0001564590-22-004803 | 10-K | XBRL Viewer

Subsequent Events	12 Months Ended
Dec. 31, 2021
Subsequent Events [Abstract]
Subsequent Events	15. SUBSEQUENT EVENTS Subsequent to the year ended December 31, 2021 and through trade date of February 10, 2022, the Company repurchased an additional 1.2 million shares of common stock at an average price of $515.83 per share for a total value of $634.1 million. On January 24, 2022, the Board of Directors of the Company declared a quarterly dividend of $1.04 per share of common stock to be paid on February 28, 2022 to shareholders of record as of the close of trading on February 18, 2022.

Subsequent Events

12 Months Ended

Dec. 31, 2021

15. SUBSEQUENT EVENTS

Subsequent to the year ended December 31, 2021 and through trade date of February 10, 2022, the Company repurchased an additional 1.2 million shares of common stock at an average price of $515.83 per share for a total value of $634.1 million.

On January 24, 2022, the Board of Directors of the Company declared a quarterly dividend of $1.04 per share of common stock to be paid on February 28, 2022 to shareholders of record as of the close of trading on February 18, 2022.

Income Taxes - Reconciliation of U.S. Federal Statutory Income Tax Rate to the Effective Tax Rate (Detail)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
U.S. federal statutory income tax rate	21.00%	21.00%	21.00%
U.S. state and local income taxes, net of U.S. federal income tax benefits	2.90%	3.14%	2.51%
Change in tax rates applicable to non-U.S. earnings	(5.09%)	(3.30%)	(3.74%)
Foreign Derived Intangible Income (FDII), net of GILTI	(1.09%)	(3.84%)	1.05%
Domestic tax credits and incentives	(0.59%)	(0.59%)	(0.31%)
Valuation allowance			(0.10%)
Excess share-based compensation	(2.65%)	(3.24%)	(13.94%)
Other	0.92%	(0.87%)	0.11%
Effective income tax rate	15.40%	12.30%	6.58%

Segment Information - Operating Revenues by Geographic Area (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenues from External Customers and Long-Lived Assets [Line Items]
Operating revenues	$ 549,842	$ 517,099	$ 498,180	$ 478,423	$ 443,661	$ 425,333	$ 409,616	$ 416,780	$ 2,043,544	$ 1,695,390	$ 1,557,796
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Operating revenues									836,880	723,962	698,105
Other [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Operating revenues									85,744	71,408	65,997
Total Americas [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Operating revenues									922,624	795,370	764,102
United Kingdom [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Operating revenues									344,976	262,188	234,926
Other [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Operating revenues									454,239	364,547	325,221
Europe, the Middle East and Africa ("EMEA") [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Operating revenues									799,215	626,735	560,147
Japan [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Operating revenues									91,419	80,591	71,629
Other [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Operating revenues									230,286	192,694	161,918
Total Asia & Australia [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Operating revenues									$ 321,705	$ 273,285	$ 233,547

Employee Benefits

12 Months Ended

Dec. 31, 2021

Compensation And Retirement Disclosure [Abstract]

Employee Benefits

10. EMPLOYEE BENEFITS

The Company sponsors a 401(k) plan for eligible U.S. employees and defined contribution and defined benefit pension plans that cover substantially all of its non-U.S. employees. Eligible employees may participate in the MSCI 401(k) plan (or any other regional defined contribution plan sponsored by MSCI) immediately upon hire. Eligible employees receive 401(k) and other defined contribution plan matching contributions, which are subject to vesting and certain other limitations. Additionally, some non-US employees are eligible to participate in and receive contributions to defined benefit plans.

The following table reflects the employee benefits expense by cost, type and location in the Statement of Income for the periods indicated:

	Years Ended
	December 31,		December 31,		December 31,
(in thousands)	2021		2020		2019
Employee benefit cost type
401(k) and other defined contribution plans		25,740		21,804		19,909
Pension related net period benefit expense		5,785		4,671		4,135
Total	$	31,525	$	26,475	$	24,044

Location in the Statement of Income
Cost of revenues	$	12,231	$	9,913	$	9,387
Selling and marketing		9,489		7,910		7,368
Research and development		6,271		5,328		4,705
General and administrative		2,620		2,289		1,844
Other expense (income)		914		1,035		740
Total	$	31,525	$	26,475	$	24,044

The Company uses a measurement date of December 31^st to calculate obligations under its pension and postretirement plans. As of December 31, 2021 and 2020, the Company carried a net liability of $34.5 million and $36.1 million, respectively, in “Other non-current liabilities” on the Consolidated Statement of Financial Condition related to its future pension obligations. The fair value of the defined benefit plan assets was $30.2 million and $28.5 million at December 31, 2021 and 2020, respectively.

The Company’s retiree benefit plans include defined benefit plans for employees in Switzerland, as well as other countries where MSCI maintains an operating presence.

Our Switzerland plans are government-mandated retirement funds that provide employees with a minimum investment return, which is determined annually by the Swiss government and was 1.0% in the years ended December 31, 2021, 2020 and 2019. Under the Switzerland plans, the Company and our employees are required to make contributions into a fund managed by an independent investment fiduciary. Employer contributions must be in an amount at least equal to the employee’s contribution. Employee contributions are based on the respective employee’s age, salary and chosen contribution scale. As of December 31, 2021 and 2020, the Switzerland plans had a gross pension liability of $34.0 million and $34.8 million, respectively, and plan assets that totaled $26.1 million and $24.6 million, respectively. In the years ended December 31, 2021, 2020 and 2019, we recognized net periodic benefit expense of $0.3 million, $0.5 million and $1.0 million, respectively, related to our Switzerland plans. The discount rate for the Switzerland defined benefit pension plan was 0.30% and 0.10%, respectively, as of December 31, 2021 and 2020.

The investment strategies of the non-U.S. defined benefit plans vary according to the plan provisions and local laws. The majority of the assets in the non-U.S. plans are in the Switzerland plans. The Switzerland plans are associated with an insured collective retirement foundation, whereby assets are held in trust and the assets are comingled with those of other participating companies. Investment decisions are made by a board of the collective retirement foundation, comprised of participating company representatives and representatives from the insurer. The overall strategy is to manage risk while maximizing total returns.

- Definition

The entire disclosure for retirement benefits.

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+ Details

Shareholders' Equity (Deficit) - Schedule of Company's Common Stock Repurchases Made on Open Market (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Equity, Class of Treasury Stock [Line Items]
Dollar Value of Shares Repurchased	$ 139,580	$ 727,343	$ 102,081
Open Market Purchases of Common Stock [Member]
Equity, Class of Treasury Stock [Line Items]
Average Price Paid Per Share	$ 412.25	$ 291.76	$ 147.97
Total Number of Shares Repurchased	339	2,493	690
Dollar Value of Shares Repurchased	$ 139,580	$ 727,344	$ 102,081

Shareholders' Equity (Deficit) (Tables)

12 Months Ended

Dec. 31, 2021

Equity [Abstract]

Schedule of Company's Common Stock Repurchases Made on Open Market

The following table provides information with respect to repurchases of the Company’s common stock made on the open market:

Year Ended	Average Price Paid Per Share		Total Number of Shares Repurchased		Dollar Value of Shares Repurchased
	(in thousands, except per share data)
December 31, 2021	$	412.25		339	$	139,580
December 31, 2020	$	291.76		2,493	$	727,344
December 31, 2019	$	147.97		690	$	102,081

Schedule of Cash Dividends Declared and Distributed Per Common Share

The following table presents dividends declared per common share as well as total amounts declared, distributed and deferred for the periods indicated

	Dividends
	Per Share		Declared		Distributed		(Released)/ Deferred
2021	(in thousands, except per share data)
Three Months Ended March 31,	$	0.78	$	65,947	$	66,153	$	(206	)
Three Months Ended June 30,		0.78		64,863		64,489		374
Three Months Ended September 30,		1.04		86,476		85,961		515
Three Months Ended December 31,		1.04		86,475		85,973		502
Year Ended December 31,	$	3.64	$	303,761	$	302,576	$	1,185
2020
Three Months Ended March 31,	$	0.68	$	59,233	$	59,455	$	(222	)
Three Months Ended June 30,		0.68		57,360		57,068		292
Three Months Ended September 30,		0.78		65,830		65,454		376
Three Months Ended December 31,		0.78		65,029		64,653		376
Year Ended December 31,	$	2.92	$	247,452	$	246,630	$	822
2019
Three Months Ended March 31,	$	0.58	$	55,339	$	57,988	$	(2,649	)
Three Months Ended June 30,	0.58			49,613		49,365		248
Three Months Ended September 30,	0.68			58,176		57,882		294
Three Months Ended December 31,	0.68			58,176		57,916		260
Year Ended December 31,	$	2.52	$	221,304	$	223,151	$	(1,847	)

Summary of Activity Related to Shares of Common Stock Issued and Repurchased

The following table presents activity related to shares of common stock issued and repurchased for the periods indicated:

	Common		Treasury			Common Stock
	Stock Issued		Stock			Outstanding
Balance At December 31, 2018		130,029,926		(45,855,788	)		84,174,138
Dividend payable/paid		1,064		(585	)		479
Common stock issued and exercise of stock options		2,387,145		—			2,387,145
Shares withheld for tax withholding		—		(1,077,815	)		(1,077,815	)
Shares repurchased under stock repurchase programs		—		(689,891	)		(689,891	)
Shares issued to Directors		1,277		(403	)		874
Balance At December 31, 2019		132,419,412		(47,624,482	)		84,794,930
Dividend payable/paid		553		(337	)		216
Common stock issued		406,960		—			406,960
Shares withheld for tax withholding		—		(165,239	)		(165,239	)
Shares repurchased under stock repurchase programs		—		(2,492,994	)		(2,492,994	)
Shares issued to Directors		2,250		27,284			29,534
Balance At December 31, 2020		132,829,175		(50,255,768	)		82,573,407
Dividend payable/paid		268		(156	)		112
Common stock issued		331,427		—			331,427
Shares withheld for tax withholding		—		(133,431	)		(133,431	)
Shares repurchased under stock repurchase programs		—		(338,577	)		(338,577	)
Shares issued to Directors		1,308		5,203			6,511
Balance At December 31, 2021		133,162,178		(50,722,729	)		82,439,449

Summary of Share-based Compensation Expense

The following table presents the amount of share-based compensation expense by category for the periods indicated:

	Years Ended
	December 31,		December 31,		December 31,
(in thousands)	2021		2020		2019
Cost of revenues	$	17,285	$	14,523	$	11,190
Selling and marketing		14,411		13,545		14,943
Research and development		7,913		7,344		5,966
General and administrative		17,463		19,826		11,991
Other expense (income)		1,416		379		—
Total share-based compensation expense	$	58,488	$	55,617	$	44,090

Summary of Fair Value of PSUs on the Award Dates Estimated Under the Monte Carlo Method Assumptions

The fair value of the PSUs on the award dates were estimated under the Monte Carlo method using the following assumptions:

	Years Ended
	December 31,			December 31,			December 31,
	2021			2020			2019
Risk free interest rate		0.33	%		1.28	%		2.46	%
Historical stock price volatility		34.13	%		25.42	%		21.98	%
Term (in years)		4.0			3.8			3.7
Discount of Lack of Marketability		4.0	%		0.0	%		0.0	%

Summary of Vested and Unvested Share-Based Awards Activity

The following table presents activity concerning the Company’s vested and unvested Share-based Awards applicable to its employees (share data in thousands) for the period indicated:

				Weighted
				Average
				Grant
	Number of			Date Fair
For the Year Ended December 31, 2021	Shares			Value
Vested and unvested Share-based Awards at December 31, 2020		739		$	163.99
Granted		330		$	265.99
Conversion to common stock		(340	)	$	153.66
Canceled		(32	)	$	274.66
Vested and unvested Share-based Awards at December 31, 2021 ⁽¹⁾		697		$	217.05

⁽¹⁾	As of December 31, 2021, 639 Share-based Awards, with a weighted average grant date fair value of $213.70, were vested or expected to vest.

Summary of Unvested Share-Based Awards Activity

The following table presents activity concerning the Company’s unvested Share-based Awards related to its employees (share data in thousands):

				Weighted
				Average
				Grant
	Number of			Date Fair
For the Year Ended December 31, 2021	Shares			Value
Unvested Share-based Awards at December 31, 2020		727		$	164.58
Granted		293		$	268.91
Vested		(318	)	$	156.41
Canceled		(32	)	$	274.66
Unvested Share-based Awards at December 31, 2021		670		$	217.05

Unvested Share-based Awards expected to vest		612		$	210.15

Employee Benefits (Tables)

12 Months Ended

Dec. 31, 2021

Compensation And Retirement Disclosure [Abstract]

Schedule of Employee Benefit Expense by Cost, Type and Location

The following table reflects the employee benefits expense by cost, type and location in the Statement of Income for the periods indicated:

	Years Ended
	December 31,		December 31,		December 31,
(in thousands)	2021		2020		2019
Employee benefit cost type
401(k) and other defined contribution plans		25,740		21,804		19,909
Pension related net period benefit expense		5,785		4,671		4,135
Total	$	31,525	$	26,475	$	24,044

Location in the Statement of Income
Cost of revenues	$	12,231	$	9,913	$	9,387
Selling and marketing		9,489		7,910		7,368
Research and development		6,271		5,328		4,705
General and administrative		2,620		2,289		1,844
Other expense (income)		914		1,035		740
Total	$	31,525	$	26,475	$	24,044

Segment Information - Long-Lived Assets by Geographic Area (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 268,176	$ 289,806
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	167,870	182,776
Other [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	13,480	13,949
Total Americas [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	181,350	196,725
United Kingdom [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	19,563	19,678
Other [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	34,240	33,561
Total EMEA [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	53,803	53,239
Japan [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	1,150	1,896
Other [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	31,873	37,946
Total Asia & Australia [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 33,023	$ 39,842

Segment Information - Additional Information (Detail)	12 Months Ended
Segment Information - Additional Information (Detail)	Dec. 31, 2021 Segment Reporting_unit
Segment Reporting [Abstract]
Number of operating segments \| Segment	5
Number of reportable segments \| Reporting_unit	4

Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Statement [Abstract]
Operating revenues	$ 2,043,544	$ 1,695,390	$ 1,557,796
Operating expenses:
Cost of revenues (exclusive of depreciation and amortization)	358,684	291,704	294,961
Selling and marketing	243,185	216,496	219,298
Research and development	111,564	101,053	98,334
General and administrative	147,893	114,627	110,093
Amortization of intangible assets	80,592	56,941	49,410
Depreciation and amortization of property, equipment and leasehold improvements	28,901	29,805	29,999
Total operating expenses	970,819	810,626	802,095
Operating income	1,072,725	884,764	755,701
Interest income	(1,497)	(5,030)	(16,403)
Interest expense	159,614	156,324	148,041
Other expense (income)	56,472	47,245	20,745
Other expense (income), net	214,589	198,539	152,383
Income before provision for income taxes	858,136	686,225	603,318
Provision for income taxes	132,153	84,403	39,670
Net income	$ 725,983	$ 601,822	$ 563,648
Earnings per share:
Basic	$ 8.80	$ 7.19	$ 6.66
Diluted	$ 8.70	$ 7.12	$ 6.59
Weighted average shares outstanding:
Basic	82,508	83,716	84,644
Diluted	83,479	84,517	85,536

Introduction and Basis of Presentation - Changes in Allowance for Doubtful Accounts (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Receivables [Abstract]
Balance at beginning of year	$ 1,583	$ 1,715	$ 1,027
Addition (reduction) to credit loss expense	1,210	1,712	1,024
Adjustments and write-offs, net of recoveries	(456)	(1,844)	(336)
Balance at ending of year	$ 2,337	$ 1,583	$ 1,715

Income Taxes - Reconciliation of Unrecognized Tax Benefits (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Beginning balance	$ 16,621	$ 15,841	$ 14,091
Increases based on tax positions related to the current period	511	292	2,413
Increases based on tax positions related to prior periods	20,321	2,099
Decreases related to a lapse of applicable statute of limitations	(4,414)	(1,611)	(663)
Ending balance	$ 33,039	$ 16,621	$ 15,841

Revenue Recognition (Tables)

12 Months Ended

Dec. 31, 2021

Revenue From Contract With Customer [Abstract]

Disaggregation of Operating Revenue

The tables that follow present the disaggregated operating revenues for the periods indicated:

	For the Year Ended December 31, 2021
	Segments
(in thousands)	Index		Analytics		ESG and Climate		All Other - Private Assets		Total
Operating Revenues Types
Recurring subscriptions	$	650,629	$	533,178	$	162,609	$	79,624	$	1,426,040
Asset-based fees		553,991		—		—		—		553,991
Non-recurring		47,144		11,121		3,583		1,665		63,513
Total	$	1,251,764	$	544,299	$	166,192	$	81,289	$	2,043,544

	For the Year Ended December 31, 2020
	Segments
(in thousands)	Index		Analytics		ESG and Climate		All Other - Private Assets		Total
Operating Revenues Types
Recurring subscriptions	$	580,393	$	506,301	$	109,945	$	51,536	$	1,248,175
Asset-based fees		399,771		—		—		—		399,771
Non-recurring		36,331		7,507		1,419		2,187		47,444
Total	$	1,016,495	$	513,808	$	111,364	$	53,723	$	1,695,390

	For the Year Ended December 31, 2019
	Segments
(in thousands)	Index		Analytics		ESG and Climate		All Other - Private Assets		Total
Operating Revenues Types
Recurring subscriptions	$	530,968	$	486,282	$	89,563	$	47,227	$	1,154,040
Asset-based fees		361,927		—		—		—		361,927
Non-recurring		28,042		10,643		1,096		2,048		41,829
Total	$	920,937	$	496,925	$	90,659	$	49,275	$	1,557,796

Schedule of Change in Accounts Receivable and Deferred Revenue

The table that follows presents the change in accounts receivable and deferred revenue between the dates indicated:

	Accounts receivable		Deferred revenue
	(in thousands)
Opening (December 31, 2020)	$	558,569	$	675,870
Closing (December 31, 2021)		664,511		824,912
Increase/(decrease)	$	105,942	$	149,042

	Accounts receivable		Deferred revenue
	(in thousands)
Opening (December 31, 2019)	$	499,268	$	574,656
Closing (December 31, 2020)		558,569		675,870
Increase/(decrease)	$	59,301	$	101,214

Schedule of Remaining Performance Obligations

The remaining performance obligations for contracts that have a duration of greater than one year and the periods in which they are expected to be recognized are as follows:

	As of
	December 31,
	2021
	(in thousands)
First 12-month period	$	476,131
Second 12-month period		273,355
Third 12-month period		96,332
Periods thereafter		40,901
Total	$	886,719

Earnings Per Common Share (Tables)

12 Months Ended

Dec. 31, 2021

Earnings Per Share [Abstract]

Computation of Basic and Diluted EPS

The following table presents the computation of basic and diluted EPS:

	Years Ended
	December 31,		December 31,		December 31,
	2021		2020		2019
(in thousands, except per share data)
Net income	$	725,983	$	601,822	$	563,648

Basic weighted average common shares outstanding		82,508		83,716		84,644
Effect of dilutive securities:
Stock options, RSUs and PSUs		971		801		892
Diluted weighted average common shares outstanding		83,479		84,517		85,536

Earnings per basic common share	$	8.80	$	7.19	$	6.66

Earnings per diluted common share	$	8.70	$	7.12	$	6.59

Consolidated Statements of Shareholders' Equity (Deficit) - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment [Member]	Common Stock [Member]	Treasury Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Retained Earnings [Member] Cumulative Effect, Period of Adoption, Adjustment [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Balance at Dec. 31, 2018	$ (166,494)		$ 1,300	$ (3,272,774)	$ 1,306,428	$ 1,856,951		$ (58,399)
Net income	563,648					563,648
Dividends declared	(221,075)				230	(221,305)
Other comprehensive income (loss), net of tax	(4,180)							(4,180)
Shares withheld for tax withholding and exercises	(189,994)			(189,994)
Common stock issued	23		23
Compensation payable in common stock and options	41,138				41,138
Common stock repurchased and held in treasury	(102,081)			(102,081)
Common stock issued to Directors and (held in)/released from treasury	(935)			(935)
Exercise of stock options	3,236		1		3,235
Balance at Dec. 31, 2019	(76,714)		1,324	(3,565,784)	1,351,031	2,199,294		(62,579)
Net income	601,822					601,822
Dividends declared	(247,452)					(247,452)
Dividends paid in shares	186				186
Other comprehensive income (loss), net of tax	3,720							3,720
Shares withheld for tax withholding and exercises	(51,176)			(51,176)
Common stock issued	4		4
Compensation payable in common stock and options	51,320				51,320
Common stock repurchased and held in treasury	(727,343)			(727,343)
Common stock issued to Directors and (held in)/released from treasury	1,768			1,768
Balance at Dec. 31, 2020	(443,234)	$ 631	1,328	(4,342,535)	1,402,537	2,554,295	$ 631	(58,859)
Net income	725,983					725,983
Dividends declared	(303,761)					(303,761)
Dividends paid in shares	128				128
Other comprehensive income (loss), net of tax	64							64
Shares withheld for tax withholding and exercises	(58,794)			(58,794)
Common stock issued	4		4
Compensation payable in common stock and options	54,958				54,958
Common stock repurchased and held in treasury	(139,580)			(139,580)
Common stock issued to Directors and (held in)/released from treasury	765			765
Balance at Dec. 31, 2021	$ (163,467)		$ 1,332	$ (4,540,144)	$ 1,457,623	$ 2,976,517		$ (58,795)

Quarterly Results of Operations - Summary of Quarterly Results of Operations (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Quarterly Financial Information Disclosure [Abstract]
Operating revenues	$ 549,842	$ 517,099	$ 498,180	$ 478,423	$ 443,661	$ 425,333	$ 409,616	$ 416,780	$ 2,043,544	$ 1,695,390	$ 1,557,796
Cost of revenues	95,903	89,674	87,327	85,780	75,935	70,704	70,456	74,609
Selling and marketing	68,708	59,819	58,191	56,467	56,662	52,668	51,617	55,549	243,185	216,496	219,298
Research and development	30,819	28,352	27,531	24,862	27,056	24,901	22,534	26,562	111,564	101,053	98,334
General and administrative	44,873	38,110	30,182	34,728	27,872	27,613	28,309	30,833	147,893	114,627	110,093
Amortization of intangible assets	21,023	14,105	30,396	15,068	14,770	14,333	14,062	13,776	80,592	56,941	49,410
Depreciation and amortization of property, equipment and leasehold improvements	7,929	6,809	7,020	7,143	7,281	7,494	7,463	7,567	28,901	29,805	29,999
Total operating expenses	269,255	236,869	240,647	224,048	209,576	197,713	194,441	208,896	970,819	810,626	802,095
Operating income	280,587	280,230	257,533	254,375	234,085	227,620	215,175	207,884	1,072,725	884,764	755,701
Interest income	(368)	(396)	(347)	(386)	(301)	(475)	(771)	(3,483)	(1,497)	(5,030)	(16,403)
Interest expense	40,336	42,137	39,557	37,584	37,330	37,536	41,227	40,231	159,614	156,324	148,041
Other expense (income)	(5,144)	37,839	22,628	1,149	1,890	1,516	35,552	8,287	56,472	47,245	20,745
Other expense (income), net	34,824	79,580	61,838	38,347	38,919	38,577	76,008	45,035	214,589	198,539	152,383
Income before provision for income taxes	245,763	200,650	195,695	216,028	195,166	189,043	139,167	162,849	858,136	686,225	603,318
Provision for income taxes	51,898	30,774	30,272	19,209	38,950	6,685	24,044	14,724	132,153	84,403	39,670
Net income	$ 193,865	$ 169,876	$ 165,423	$ 196,819	$ 156,216	$ 182,358	$ 115,123	$ 148,125	$ 725,983	$ 601,822	$ 563,648
Earnings per basic common share	$ 2.35	$ 2.06	$ 2.01	$ 2.38	$ 1.89	$ 2.18	$ 1.38	$ 1.75	$ 8.80	$ 7.19	$ 6.66
Earnings per diluted common share	$ 2.32	$ 2.03	$ 1.99	$ 2.36	$ 1.87	$ 2.16	$ 1.36	$ 1.73	$ 8.70	$ 7.12	$ 6.59
Weighted average shares outstanding used in computing per share data
Basic	82,473	82,470	82,454	82,640	82,737	83,602	83,666	84,870	82,508	83,716	84,644
Diluted	83,578	83,554	83,295	83,493	83,707	84,479	84,349	85,548	83,479	84,517	85,536

Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Examination [Line Items]
Interest carryforwards	$ 11,215,000	$ 7,901,000
Valuation allowance	36,000
Decrease in unrecognized tax benefit	31,600,000
Total amount of unrecognized tax benefits	33,000,000.0	16,600,000	$ 15,800,000
Unrecognized tax benefits, interest on income tax expense(benefit)	0	0	(400,000)
Penalties recognized during the year	300,000	400,000	0
Amount of accrued interest	$ 900,000	900,000	$ 900,000
Minimum [Member]
Income Tax Examination [Line Items]
Tax years under examination	2008
Maximum [Member]
Income Tax Examination [Line Items]
Tax years under examination	2020
Other Non-Current Assets [Member]
Income Tax Examination [Line Items]
Prepayments of taxes	$ 36,500,000
Domestic Tax Authority [Member]
Income Tax Examination [Line Items]
Interest carryforwards	0	700,000
Net operating loss carryforwards	69,700,000	8,700,000
Net operating loss carryforwards, tax value	$ 17,900,000	1,800,000
Expiration period	2026
Foreign Tax Authority [Member]
Income Tax Examination [Line Items]
Interest carryforwards	$ 11,200,000	7,200,000
Net operating loss carryforwards, tax value	$ 300,000	$ 1,200,000
Expiration period	2023

Commitment and Contingencies

12 Months Ended

Dec. 31, 2021

Commitments And Contingencies Disclosure [Abstract]

Commitments and Contingencies

6. COMMITMENTS AND CONTINGENCIES

Senior Unsecured Notes. The Company had an aggregate of $4,200.0 million in senior unsecured notes (collectively, the “Senior Notes”) outstanding at December 31, 2021, as presented in the table below:

		Principal amount outstanding at		Carrying value at		Carrying value at		Fair Value at		Fair Value at
	Maturity Date	December 31, 2021		December 31, 2021		December 31, 2020		December 31, 2021		December 31, 2020
	(in thousands)
Long-term debt
4.750% senior unsecured notes due 2026	August 1, 2026		-		-		496,257		-		522,325
5.375% senior unsecured notes due 2027	May 15, 2027		-		-		495,819		-		538,100
4.000% senior unsecured notes due 2029	November 15, 2029		1,000,000		991,455		990,364		1,047,950		1,073,040
3.625% senior unsecured notes due 2030	September 1, 2030		900,000		894,263		395,458		924,777		419,428
3.875% senior unsecured notes due 2031	February 15, 2031		1,000,000		989,973		988,879		1,046,620		1,063,430
3.625% senior unsecured notes due 2031	November 1, 2031		600,000		593,538		-		625,536		-
3.250% senior unsecured notes due 2033	August 15, 2033		700,000		692,193		-		710,906		-
Total long-term debt		$	4,200,000	$	4,161,422	$	3,366,777	$	4,355,789	$	3,616,323

Interest payments attributable to the Senior Notes are due as presented in the following table:

	First semi-annual interest payment date	Second semi- annual interest payment date
Senior Notes
4.000% senior unsecured notes due 2029	May 15	November 15
3.625% senior unsecured notes due 2030	March 1	September 1
3.875% senior unsecured notes due 2031	June 1	December 1
3.625% senior unsecured notes due 2031⁽¹⁾	May 1	November 1
3.250% senior unsecured notes due 2033⁽²⁾	February 15	August 15

⁽¹⁾The first payment occurred on November 1, 2021.

⁽²⁾The first payment occuring on February 15, 2022.

The fair market value of the Company’s debt obligations represent Level 2 valuations. The Company utilizes the market approach and obtains security pricing from a vendor who uses broker quotes and third-party pricing services to determine fair values.

The $1,000.0 million aggregate principal amount of 4.000% senior unsecured notes due 2029 (the “2029 Senior Notes”) are scheduled to mature and be paid in full on November 15, 2029. At any time prior to November 15, 2024, the Company may redeem all or part of the 2029 Senior Notes at a redemption price equal to the sum of (i) 100% of the principal amount thereof, plus (ii) a make-whole premium as of the date of redemption, plus (iii) accrued and unpaid interest and additional interest, if any, thereon, to the date of redemption. In addition, the Company may redeem all or part of the 2029 Senior Notes, together with accrued and unpaid interest, on or after November 15, 2024, at redemption prices set forth in the indenture governing the 2029 Senior Notes. At any time prior to November 15, 2022, the Company may use the proceeds of certain equity offerings to redeem up to 35% of the aggregate principal amount of the 2029 Senior Notes, including any permitted additional notes, at a redemption price equal to 104.000% of the principal amount plus accrued and unpaid interest, if any, to the redemption date, so long as at least 50% of the aggregate principal amount of all notes (excluding any additional notes, if any) issued under the indenture governing the 2029 Senior Notes remain outstanding after each such redemption occurs.

The $1,000.0 million aggregate principal amount of 3.875% senior unsecured notes due 2031 (the “2031A Senior Notes”) are scheduled to mature and be paid in full on February 15, 2031. At any time prior to June 1, 2025, the Company may redeem all or part of the 2031A Senior Notes at a redemption price equal to the sum of (i) 100% of the principal amount thereof, plus (ii) a make-whole premium as of the date of redemption, plus (iii) accrued and unpaid interest, if any, to, but excluding, the redemption date. In addition, the Company may redeem all or part of the 2031A Senior Notes, together with accrued and unpaid interest, on or after June 1, 2025, at redemption prices set forth in the indenture governing the 2031A Senior Notes. At any time prior to June 1, 2023, the Company may use the proceeds of certain equity offerings to redeem up to 35% of the aggregate principal amount of the 2031A Senior Notes, including any permitted additional notes, at a redemption price equal to 103.875% of the principal amount plus accrued and unpaid interest, if any, to, but excluding, the redemption date, so long as at least 50% of the aggregate principal amount of all notes (excluding any additional notes, if any) issued under the indenture governing the 2031A Senior Notes remain outstanding after each such redemption occurs.

On March 26, 2021, the Company issued $500.0 million aggregate principal amount of 3.625% senior unsecured notes due 2030 (the “Additional 2030 Senior Notes”) in a private offering that was exempt from the registration requirements of the Securities Act. The Additional 2030 Senior Notes constitute a further issuance of, are fully fungible with, rank equally with and form a single series with the $400.0 million aggregate principal amount of the 3.625% senior unsecured notes due 2030 issued by the Company on March 4, 2020 (the “Initial 2030 Senior Notes,” and together with the Additional 2030 Senior Notes, the “2030 Senior Notes”). In connection with the completion of the offering of the Additional 2030 Senior Notes, the Company announced that it intended to use a portion of the net proceeds from the offering, together with available cash, for the pre-maturity redemption of all $500.0 million aggregate principal amount outstanding of its 4.750% senior unsecured notes due 2026 (the “2026 Senior Notes”). On April 12, 2021 the Company completed the pre-maturity redemption of all of its 2026 Senior Notes. The pre-maturity redemption of the 2026 Senior Notes resulted in an approximately $21.8 million loss on extinguishment that was recorded in other expense (income), which includes an applicable premium of approximately $18.2 million (as set forth in the indenture governing the terms of the 2026 Senior Notes) and the write-off of approximately $3.6 million of unamortized debt issuance costs associated with the 2026 Senior Notes.

The 2030 Senior Notes are scheduled to mature and be paid in full on September 1, 2030. At any time prior to March 1, 2025, the Company may redeem all or part of the 2030 Senior Notes at a redemption price equal to the sum of (i) 100% of the principal amount thereof, plus (ii) a make-whole premium as of the date of redemption, plus (iii) accrued and unpaid interest and additional interest, if any, thereon, to the date of redemption. In addition, the Company may redeem all or part of the 2030 Senior Notes, together with accrued and unpaid interest, on or after March 1, 2025, at redemption prices set forth in the indenture governing the 2030 Senior Notes. At any time prior to March 1, 2023, the Company may use the proceeds of certain equity offerings to redeem up to 35% of the aggregate principal amount of the 2030 Senior Notes, including any permitted additional notes, at a redemption price equal to 103.625% of the principal amount plus accrued and unpaid interest, if any, to the redemption date, so long as at least 50% of the aggregate principal amount of the Initial 2030 Senior Notes (excluding the Additional 2030 Senior Notes and any additional notes, if any) issued under the indenture governing the 2030 Senior Notes remain outstanding after each such redemption occurs.

On May 14, 2021, the Company issued $600.0 million aggregate principal amount of 3.625% Senior Unsecured Notes due 2031 (the “2031B Senior Notes”) in a private offering that was exempt from the registration requirements of the Securities Act. The 2031B Senior Notes are scheduled to mature and be paid in full on November 1, 2031. At any time prior to November 1, 2026, the Company may redeem all or part of the 2031B Senior Notes at a redemption price equal to the sum of (i) 100% of the principal amount thereof, plus (ii) a make-whole premium as of the date of redemption, plus (iii) accrued and unpaid interest, if any, thereon, to the date of redemption. In addition, the Company may redeem all or part of the 2031B Senior Notes, together with accrued and unpaid interest, on or after November 1, 2026, at redemption prices set forth in the indenture governing the 2031B Senior Notes. At any time prior to November 1, 2024, the Company may use the proceeds of certain equity offerings to redeem up to 35% of the aggregate principal amount of the 2031B Senior Notes, including any permitted additional notes, at a redemption price equal to 103.625% of the principal amount plus accrued and unpaid interest, if any, to the redemption date, so long as at least 50% of the aggregate principal amount of all notes (excluding any additional notes, if any) issued under the indenture governing the 2031B Senior Notes remain outstanding after each such redemption occurs.

On August 17, 2021, the Company issued $700.0 million aggregate principal amount of 3.250% Senior Unsecured Notes due 2033 (the “2033 Senior Notes”) in a private offering that was exempt from the registration requirements of the Securities Act. In connection with the completion of the offering, the Company announced that it intended to use a portion of the net proceeds from the offering for the pre-maturity redemption of all $500.0 million aggregate principal amount outstanding of its 5.375% senior unsecured notes due 2027 (the “2027 Senior Notes”). On September 2, 2021 the Company completed the pre-maturity redemption of all of its 2027 Senior Notes. The pre-maturity redemption of the 2027 Senior Notes resulted in an approximately $37.3 million loss on extinguishment that was recorded in other expense (income), which includes an applicable premium of approximately $33.6 million (as set forth in the indenture governing the terms of the 2027 Senior Notes) and the write-off of approximately $3.7 million of unamortized debt issuance costs associated with the 2027 Senior Notes.

The 2033 Senior Notes are scheduled to mature and be paid in full on August 15, 2033. At any time prior to August 15, 2027, the Company may redeem all or part of the 2033 Senior Notes at a redemption price equal to the sum of (i) 100% of the principal amount thereof, plus (ii) a make-whole premium as of the date of redemption, plus (iii) accrued and unpaid interest and additional interest, if any, thereon, to the date of redemption. In addition, the

Company may redeem all or part of the 2033 Senior Notes, together with accrued and unpaid interest, on or after August 15, 2027, at redemption prices set forth in the indenture governing the 2033 Senior Notes. At any time prior to August 15, 2024, the Company may use the proceeds of certain equity offerings to redeem up to 35% of the aggregate principal amount of the 2033 Senior Notes, including any permitted additional notes, at a redemption price equal to 103.250% of the principal amount plus accrued and unpaid interest, if any, to the redemption date, so long as at least 50% of the aggregate principal amount of all notes (excluding any additional notes, if any) issued under the indenture governing the 2033 Senior Notes remain outstanding after each such redemption occurs.

Revolver. Since November 20, 2014, the Company has maintained a revolving credit agreement with a syndicate of banks (as amended, the “Revolving Credit Agreement”). On March 29, 2021, the Company entered into Amendment No. 4 (the “Fourth Amendment”) to the Revolving Credit Agreement. The Fourth Amendment, among other things, (i) increased aggregate commitments available to be borrowed by $100.0 million to an aggregate of $500.0 million of availability thereunder until November 2024, at which point the aggregate commitments will be $467.5 million, and (ii) extended the term to March 2026. At December 31, 2021, the Revolving Credit Agreement was undrawn.

In connection with the closings of the Senior Notes offerings, entry into the Revolving Credit Agreement and the subsequent amendments, the Company paid certain financing fees which, together with the existing fees related to prior credit facilities, are being amortized over their related lives. At December 31, 2021, $40.6 million of the deferred financing fees and premium remain unamortized, $0.5 million of which is included in “Prepaid and other assets,” $1.5 million of which is included in “Other non-current assets” and $38.6 million of which is included in “Long-term debt” on the Consolidated Statement of Financial Condition.

Revenue Recognition - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenue Recognition [Line Items]
Revenue recognized during period included in deferred revenue	$ 672.5	$ 555.8	$ 522.7
Revenue, performance obligations and revenue recognition, description	For contracts that have a duration of one year or less, the Company has not disclosed either the remaining performance obligation as of the end of the reporting period or when the Company expects to recognize the revenue.
Other Non-Current Liabilities [Member]
Revenue Recognition [Line Items]
Long-term deferred revenue	$ 23.4	$ 7.1	$ 4.3

Introduction and Basis of Presentation

12 Months Ended

Dec. 31, 2021

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Introduction and Basis of Presentation

1. INTRODUCTION AND BASIS OF PRESENTATION

Organization

MSCI Inc., together with its wholly owned subsidiaries (the “Company” or “MSCI”) is a leading provider of critical decision support tools and solutions for the global investment community. Our mission-critical offerings help investors address the challenges of a transforming investment landscape and power better investment decisions. Leveraging our knowledge of the global investment process and our expertise in research, data and technology, we enable our clients to understand and analyze key drivers of risk and return and confidently and efficiently build more effective portfolios. Our products and services include indexes; portfolio construction and risk management tools; environmental, social and governance (“ESG”) and climate solutions; and real estate market and transaction data and analysis.

Basis of Presentation

The consolidated financial statements and accompanying notes to financial statements, which include the accounts of MSCI Inc. and its wholly owned subsidiaries, are prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”).

Certain prior period amounts have been reclassified to conform to the current period presentation. Effective January 1, 2021, the ESG and Climate operating segment is being presented as a separate reportable segment. The operating segments of Real Estate and The Burgiss Group, LLC (“Burgiss”) do not individually meet the segment reporting thresholds and have been combined and presented as part of the All Other – Private Assets reportable segment. As of December 31, 2021, the Company had an approximately $218.8 million equity method investment in Burgiss, representing a 33.6% equity ownership.

Significant Accounting Policies

Basis of Financial Statements and Use of Estimates

The Company makes certain estimates and judgments that can affect the reported amounts of assets and liabilities as of the date of the consolidated financial statements, as well as the reported amounts of operating revenues and expenses during the periods presented. Significant estimates and judgments made by management include such examples as assessment of impairment of goodwill and intangible assets and income taxes. The Company believes that estimates used in the preparation of these consolidated financial statements are reasonable; however, actual results could differ materially from these estimates. Inter-company balances and transactions are eliminated in consolidation.

Revenue Recognition

Performance Obligations and Transaction Price

The Company recognizes revenues for products and services when performance obligations are satisfied. For revenue arrangements containing multiple products or services, the Company accounts for the individual products or services as a separate performance obligation if they are distinct. A product or service is distinct if a client can benefit from it either on its own or together with other resources that are readily available to the client, and the Company’s promise to transfer the product or service to the client is separately identifiable from other promises in the contract. If both criteria are not met, the promised products or services are accounted for as a combined performance obligation.

The transaction price is the amount of consideration to which an entity expects to be entitled in exchange for transferring products or services to the client. The Company allocates the transaction price to each performance obligation identified in the contract based on the best estimate of a relative standalone selling price of each distinct product or service in the contract. To allocate the transaction price to each performance obligation on a relative standalone selling price basis, at contract inception the Company determines the standalone selling prices of the distinct products or services underlying each performance obligation in proportion to the total transaction price. This standalone selling price may be the contract price but is more often than not the best estimate of the price the

Company would receive for selling the product or service separately in similar circumstances and to other similar customers. A client can receive a discount for purchasing a bundle of products or services if the sum of the standalone selling price of those promised products or services in the contract exceeds the promised consideration in the contract.

For services where the transaction price is variable based upon assets under management (“AUM”), volume of trades, fee levels or number of investments linked to MSCI’s indexes, the transaction price is based upon pricing models and is not allocated at the inception of the contract but rather falls within the sales and usage-based royalty exception under which the price and associated revenue are based upon actual known performance or best estimates of actual performance during the performance period.

Revenue is recognized when a client obtains control of promised products or services in an amount that reflects the consideration the entity expects to receive in exchange for those products or services. Determining when control has transferred can sometimes require management’s judgment (e.g., implementation services), which could affect the timing of revenue recognition. Revenue is recognized exclusive of any applicable sales or other indirect taxes.

Disaggregation of Revenue

Revenues are characterized by type, which broadly reflects the nature of how they are recognized or earned. Our revenue types are recurring subscriptions, asset-based fees and non-recurring revenues. We also group our revenues by segment.

Revenues By Type

Recurring subscription revenues represent fees earned from clients primarily under renewable contracts or agreements and are generally paid annually or quarterly in advance and recognized in most cases ratably over the term of the license or service pursuant to the contract terms. Revenues from subscription agreements for the receipt of periodic benchmark reports, digests and other publications, which are most often associated with our real estate offerings, are generally billed and recognized upon delivery of such reports or data updates.

Asset-based fees are principally recognized based on the estimated AUM linked to our indexes from independent third-party sources or the most recently reported information provided by the client. Asset-based fees also include revenues related to futures and options contracts linked to our indexes, which are primarily based on trading volumes and fee levels. Asset-based fees are generally variable based upon AUM or the volume of trades or fee levels and are generally billed quarterly in arrears.

Non-recurring revenues primarily represent fees earned on products and services where we do not have renewal clauses within the contract and revenues for providing customized reports, historical data sets, certain derivative financial products and certain implementation and consulting services. Based on the nature of the services provided, non-recurring revenues are generally billed upon delivery and recognized upon delivery or over the service period.

Revenues By Segment

Index segment operating revenues consist of fees earned for licenses of index data subscriptions, performance obligations to deliver the data are satisfied over time and, accordingly, revenue is recognized ratably over the term of the agreement pursuant to the contract terms. With respect to licenses to create indexed investment products, such as ETFs, passively managed funds, or licenses which allow certain exchanges to use MSCI’s indexes as the basis for futures and options contracts, MSCI’s performance obligation allows customers to use the Company’s intellectual property (e.g., the indexes) as the basis of the funds or other investment products the customers create over the term of the agreement. The fees earned for these rights are typically variable, in which case they are accrued under the sales and usage-based royalty exception pursuant to the level of performance achieved, which is measured based on AUM, volume of trades or other variable factors. The level of performance achieved is based on information obtained from independent third-party sources or best estimates taking into account the most recently reported information from the client.

Analytics segment operating revenues are recognized as MSCI satisfies performance obligations through providing access to its proprietary models or hosted applications and, in some cases, delivery of managed services, which are typically satisfied over time, and accordingly, operating revenues are recognized ratably over the term of the service period. For implementation services, MSCI meets its performance obligation once the implementation is

complete and the related service is available for the client to use. Operating revenues are recognized at the point in time when the implementation service is completed.

ESG and Climate segment operating revenues are recognized as MSCI’s performance obligations to provide data to or update data for clients are satisfied. The majority of these performance obligations are satisfied over the term of the license period, with operating revenues recognized ratably. For custom ESG research data, the performance obligation is typically satisfied, and revenue is recognized, at the point in time when the data is updated and available to the client.

All Other – Private Assets segment operating revenues are recognized based on performance obligations satisfied over time and at a point in time. Operating revenues for many Real Estate products including Market Information products and publications, subscriptions to Enterprise Analytics, Global Intel, and Income Analytics, Climate Value-at-Risk solutions and licenses to transaction and market insights data, are recognized over time as publications, analysis, insights and data are updated and made available to clients throughout the year. Operating revenues for select Real Estate products, including benchmark reports, are recognized at the point in time when the Company satisfies the performance obligation through delivery to the client.

Share-Based Compensation

Certain of the Company’s employees have received share-based compensation under various compensation programs. The Company’s compensation expense reflects the fair value method of accounting for share-based payments under ASC Subtopic 718-10, “Compensation—Stock Compensation.” ASC Subtopic 718-10 requires measurement of compensation cost for equity-based awards at fair value and recognition of compensation cost over the service period, net of estimated forfeitures per the Company’s policy.

The fair value of MSCI restricted stock units (“RSUs”) is measured using the price of MSCI’s common stock. Restricted stock units that are subject to the achievement of multi-year total shareholder return targets (“PSUs”) are performance awards with a market condition. The fair value of PSUs is determined using a Monte Carlo simulation model that creates a normal distribution of future stock prices, which is then used to value the awards based on their individual terms. From time to time, the Company awards restricted stock units subject to performance conditions that are not linked to a market condition but are based on performance measures that impact the amount of shares that each recipient will receive upon vesting. The fair value of such awards is measured using the price of MSCI’s common stock.

Research and Development

The Company accounts for research and development costs in accordance with several accounting pronouncements, including ASC Subtopic 730-10, “Research and Development.” ASC Subtopic 730-10 requires that research and development costs generally be expensed as incurred. The majority of the Company’s research and development costs are incurred in developing, reviewing and enhancing the methodologies and data models offered within its product portfolio by monitoring investment trends and drivers globally, as well as analyzing product-specific needs in areas such as capitalization-weighted, factor and specialized indexes, and instrument valuation, risk modeling, portfolio construction, asset allocation and value-at-risk simulation.

Internal Use Software

The Company applies the provisions of ASC Subtopic 350-40, “Internal Use Software,” and accounts for the cost of computer software developed for internal use by capitalizing qualifying costs, which are substantially incurred during the application development stage. The amounts capitalized are included in Intangible Assets on the Consolidated Statement of Financial Condition and include external direct costs of services used in developing internal-use software and payroll and payroll-related costs of employees directly associated with the development activities. Additionally, costs incurred relating to upgrades and enhancements to the software are capitalized if it is determined that these upgrades or enhancements provide additional functionality to the software.

Capitalized software development costs are typically amortized on a straight-line basis over the estimated useful life of the related product, which is typically three to five years, beginning with the date the software is placed into service.

Costs incurred in the preliminary and post-implementation stages of MSCI’s products are expensed as incurred.

Income Taxes

Provision for income taxes is provided for using the asset and liability method, under which deferred tax assets and deferred tax liabilities are determined based on the temporary differences between the financial statement and income tax bases of assets and liabilities using currently enacted tax rates. The Company elects to account for Global Intangible Low-Taxed Income (“GILTI”) in the year the tax is incurred. The Company recognizes interest and penalties related to income tax matters within “Provision for income taxes” in the Consolidated Statement of Income.

The Company regularly evaluates the likelihood of additional assessments in each of the taxing jurisdictions in which it is required to file income tax returns. The Company has recorded additional tax expense related to open tax years, which the Company’s management believes is adequate in relation to the potential for assessments. These amounts have been recorded in “Other non-current liabilities” on the Consolidated Statement of Financial Condition. The Company’s management believes the resolution of tax matters will not have a material effect on the Company’s consolidated financial condition. However, to the extent the Company is required to pay amounts in excess of its reserves, a resolution could have a material impact on its Consolidated Statement of Income for a particular future period. In addition, an unfavorable tax settlement could require use of cash and result in an increase in the effective tax rate in the period in which such resolution occurs.

Deferred Revenue

Deferred revenues represent both cash received and the amounts billed to clients for products and services in advance of satisfying performance obligations. Deferred revenue generally results in ratable recognition of operating revenues over the license or subscription period, as the performance obligations are satisfied.

Accounts Receivable and Allowance for Doubtful Accounts

The Company’s clients generally pay subscription fees annually or quarterly in advance. MSCI’s policy is to record to a receivable when a client is billed. For products and services that are provided in advance of billing, such as for our asset-based fee products, unbilled revenue (or a “contract asset”) is included in Accounts Receivable on the Company’s Consolidated Statement of Financial Condition.

The Company recognizes an allowance for doubtful accounts at the time invoices are sent to clients by applying an estimate of the uncollectable amount based on client profiles, credit considerations and historical write-offs. The Company does not require collateral from clients to mitigate credit risk.

Changes in the allowance for doubtful accounts from December 31, 2018 to December 31, 2021 were as follows:

	Amount
	(in thousands)
Balance as of December 31, 2018	$	1,027
Addition (reduction) to credit loss expense		1,024
Write-offs, net of recoveries		(336	)
Balance as of December 31, 2019	$	1,715
Addition (reduction) to credit loss expense		1,712
Adjustments and write-offs, net of recoveries		(1,844	)
Balance as of December 31, 2020	$	1,583
Addition (reduction) to credit loss expense		1,210
Adjustments and write-offs, net of recoveries		(456	)
Balance as of December 31, 2021	$	2,337

Goodwill

Goodwill is recorded as part of the Company’s acquisitions of businesses when the purchase price exceeds the fair value of the net tangible and separately identifiable intangible assets acquired. The Company’s goodwill is not amortized, but rather is subject to an impairment test each year, or more often if conditions indicate impairment may have occurred, pursuant to ASC Subtopic 350-10, “Intangibles—Goodwill and Other.”

The Company tests goodwill for impairment on an annual basis on July 1^st and on an interim basis when certain events and circumstances exist. The test for impairment is performed at the reporting unit level. Goodwill impairment is determined by comparing the fair value of a reporting unit with its carrying value. If the estimated fair value exceeds the carrying value, goodwill at the reporting unit level is not deemed to be impaired. If the estimated fair value is below carrying value, an impairment charge will be recorded up to, but not more than, the total amount of goodwill allocated to the reporting unit.

The Company completed its annual goodwill impairment test as of July 1, 2021 on its Index, Analytics, ESG and Climate and Real Estate reporting units, and no impairments were noted. The Company performed a quantitative test for impairment and determined that the estimated fair value of the Company’s reporting units substantially exceeded their respective carrying values.

Based on the results of the annual goodwill impairment testing performed and given there were no impairment triggers identified as part of interim assessments, no impairment of goodwill was recorded during the years ended December 31, 2021, 2020 and 2019.

Intangible Assets

The Company amortizes definite-lived intangible assets over their estimated useful lives. Definite-lived intangible assets are reviewed for impairment whenever events or changes in circumstances indicate that the carrying value of the asset may not be recoverable. The Company also reviews the useful lives on a quarterly basis to determine if the period of economic benefit has changed. If the carrying value of an intangible asset exceeds its fair value, an impairment charge would be recognized in an amount equal to the amount by which the carrying value of the intangible asset exceeds its fair value. There were no events or changes in circumstances that would indicate that the carrying value of the definite-lived intangible assets may not be recoverable during the years ended December 31, 2021 and 2020.

The Company had no indefinite-lived intangible assets.

Foreign Currency Translation

Assets and liabilities of operations having non-U.S. dollar functional currencies are translated at year-end exchange rates, and income statement accounts are translated at weighted average exchange rates for the year. Gains or losses resulting from translating foreign currency financial statements, net of any related tax effects, are reflected in accumulated other comprehensive loss, a separate component of shareholders’ equity (deficit). Gains or losses resulting from foreign currency transactions incurred in currencies other than the local functional currency are included in non-operating “Other expense (income)” on the Consolidated Statement of Income.

Leases

MSCI leases office space, data centers and certain equipment under non-cancellable operating lease agreements and determines if an arrangement is a lease at inception. The Company does not currently have any financing lease arrangements.

Right of use assets represent the Company’s right to use an underlying asset for the lease term and lease liabilities represent the Company’s obligation to make lease payments arising from the lease. Right of use assets are recognized on the commencement date based on the present value of lease payments over the lease term adjusted for initial direct costs and lease incentives received or deemed probable of being received. MSCI uses its incremental borrowing rate based on the information available on the commencement date in determining the present value of lease payments. The lease terms include options to extend or terminate the lease when it is reasonably certain that the Company will exercise that option.

Right of use assets and associated leasehold improvements are tested for impairment when there is a trigger for impairment testing at the appropriate asset group level. When a trigger exists, the asset group is tested for recoverability by comparing the estimated undiscounted cash flows to the asset group’s carrying value. If the asset group fails the recoverability test, the Company will measure impairment loss as the difference between the fair value and carrying value of the asset group.

Lease expense is recognized on a straight-line basis over the lease term and is included in “Operating expenses” in the Consolidated Statement of Income. In situations where a right of use asset has been impaired, the subsequent amortization of the right of use asset is then recorded on a straight-line basis over the remaining lease term and is combined with accretion expense on the lease liability to result in single operating lease cost.

Some of the Company’s lease agreements include rental payments adjusted periodically for inflation which are accounted for as variable lease amounts but are not reflected as a component of the Company’s lease liability. Certain leases also require the Company to pay real estate taxes, insurance, maintenance and other operating expenses associated with the leased premises or equipment which are also not reflected as a component of the Company’s lease liability. The Company also subleases a small portion of its leased office space to third parties and thereby applies sublessor accounting. Sublease income is presented in “Operating expenses” as an offset.

Property, Equipment and Leasehold Improvements

Property, equipment and leasehold improvements are stated at cost less accumulated depreciation and amortization. Depreciation and amortization of furniture and fixtures, and computer and communications equipment are accounted for using the straight-line method over the estimated useful life, and for leasehold improvements, over the shorter of the estimated useful life or the lease term.

Treasury Stock

The Company holds repurchased shares of common stock as treasury stock. The Company accounts for treasury stock under the cost method and includes treasury stock as a component of shareholders’ equity (deficit).

Accrued Compensation

A significant portion of the Company’s employee incentive compensation programs are discretionary. The Company makes significant estimates in determining its accrued compensation and benefits expenses. Accrued cash incentive estimates reflect an assessment of performance versus targets and other key performance indicators at the Company, operating segment and employee level. The Company also reviews compensation and benefits expenses throughout the year to determine how overall performance compares to management’s expectations. These and other factors, including historical performance, are taken into account in accruing discretionary cash compensation estimates quarterly.

Concentrations

For the years ended December 31, 2021, 2020 and 2019, BlackRock, Inc. accounted for 12.7%, 11.0%, and 11.5% of the Company’s consolidated operating revenues, respectively. For the years ended December 31, 2021, 2020 and 2019, BlackRock, Inc. accounted for 20.4%, 18.0% and 18.9% of the Index segment’s operating revenues, respectively. No single customer accounted for 10.0% or more of operating revenues within the Analytics, ESG and Climate and All Other – Private Assets segments for the years ended December 31, 2021, 2020 and 2019.

Property, Equipment and Leasehold Improvements, Net

12 Months Ended

Dec. 31, 2021

Property Plant And Equipment [Abstract]

Property, Equipment and Leasehold Improvements, Net

8. PROPERTY, EQUIPMENT AND LEASEHOLD IMPROVEMENTS, NET

Property, equipment and leasehold improvements, net at December 31, 2021 and 2020 consisted of the following:

		As of
	Estimated	December 31,			December 31,
	Useful Lives	2021			2020
		(in thousands)
Computer & related equipment	2 to 5 years	$	179,557		$	186,786
Furniture & fixtures	7 years		14,194			15,276
Leasehold improvements	1 to 21 years		56,308			56,537
Work-in-process	—		2,699			2,996
Subtotal			252,758			261,595
Accumulated depreciation and amortization			(186,043	)		(181,149	)
Property, equipment and leasehold improvements, net		$	66,715		$	80,446

Depreciation and amortization expense of property, equipment and leasehold improvements was $28.9 million, $29.8 million and $30.0 million for the years ended December 31, 2021, 2020 and 2019, respectively.

Income Taxes - Significant Components of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Deferred tax assets:
Capitalized expenses	$ 94,265
Unearned revenue	56,810	$ 46,530
Lease liabilities	39,507	40,786
Employee compensation and benefit plans	20,216	20,602
Interest expense carryforwards	11,215	7,901
Loss carryforwards	18,173	3,071
Pension	2,229	3,066
Other	3,509
Subtotal	245,924	121,956
Less: valuation allowance	(36)
Total deferred tax assets	245,888	121,956
Deferred tax liabilities:
Intangible assets	(147,118)	(51,862)
Right of use assets	(32,106)	(35,634)
Property, equipment and leasehold improvements, net	(27,136)	(20,197)
Unremitted foreign earnings	(3,059)	(1,279)
Other		(2,131)
Total deferred tax liabilities	209,419	111,103
Net deferred tax assets	$ 36,469	$ 10,853

Employee Benefits - Schedule of Employee Benefit Expense by Cost, Type and Location (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Total	$ 31,525	$ 26,475	$ 24,044
401(k) and Other Defined Contribution Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
401(k) and other defined contribution plans	25,740	21,804	19,909
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension related net period benefit expense	5,785	4,671	4,135
Cost of Revenues [Member]
Defined Benefit Plan Disclosure [Line Items]
Total	12,231	9,913	9,387
Selling and Marketing [Member]
Defined Benefit Plan Disclosure [Line Items]
Total	9,489	7,910	7,368
Research and Development [Member]
Defined Benefit Plan Disclosure [Line Items]
Total	6,271	5,328	4,705
General and Administrative [Member]
Defined Benefit Plan Disclosure [Line Items]
Total	2,620	2,289	1,844
Other expense (income) [Member]
Defined Benefit Plan Disclosure [Line Items]
Total	$ 914	$ 1,035	$ 740

Leases - Summary of Future Minimum Commitments Under Operating Leases (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Maturity of Lease Liabilities
2022	$ 28,271
2023	29,427
2024	23,924
2025	22,717
2026	20,447
Thereafter	73,539
Total lease payments	198,325
Less: Interest	(24,972)
Present value of lease liabilities	173,353
Other accrued liabilities	$ 23,324
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	us-gaap:AccountsPayableAndAccruedLiabilitiesCurrent
Long-term operating lease liabilities	$ 150,029	$ 152,342

Income Taxes - Summary of Deferred Tax Asset Valuation Allowance (Detail) - Valuation Allowance of Deferred Tax Assets - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2019
Valuation And Qualifying Accounts Disclosure [Line Items]
Beginning balance		$ 632
Additions charged to cost and expenses	$ 36
Deductions		$ (632)
Ending balance	$ 36

Revenue Recognition - Schedule of Remaining Performance Obligations (Detail) $ in Thousands	Dec. 31, 2021 USD ($)
Revenue Recognition [Line Items]
Remaining performance obligations	$ 886,719
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2022-01-01
Revenue Recognition [Line Items]
Remaining performance obligations	476,131
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2023-01-01
Revenue Recognition [Line Items]
Remaining performance obligations	273,355
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2024-01-01
Revenue Recognition [Line Items]
Remaining performance obligations	96,332
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2025-01-01
Revenue Recognition [Line Items]
Remaining performance obligations	$ 40,901

Acquisitions (Tables)

12 Months Ended

Dec. 31, 2021

Business Combinations [Abstract]

Components of Preliminary Purchase Price Allocation

The components of the preliminary purchase price allocation were as follows:

	Estimated Useful Life	Fair Value
		(in thousands)
Accounts receivable		$	9,645
Other current assets			3,721
Property, equipment and leasehold improvements, net			1,205
Right of use assets			6,441
Other non-current assets			3,270
Deferred revenue			(35,194	)
Other current liabilities			(14,518	)
Long-term operating lease liabilities			(4,849	)
Deferred tax liabilities			(85,196	)
Intangible assets:
Proprietary data	11 Years		185,500
Customer relationships	20 Years		175,700
Acquired technology and software	9 Years		31,500
Trademarks	2 Years		890
Goodwill			670,874
Purchase price, net of cash acquired		$	948,989

Leases - Summary of Other Information Under Operating Lease (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Operating cash flows used for operating leases	$ 30,972	$ 30,061	$ 29,886
Right of use assets obtained in exchange for new operating lease liabilities	$ 26,004	$ 11,472	$ 210,784

Revenue Recognition - Schedule of Remaining Performance Obligations (Parenthetical) (Detail)	Dec. 31, 2021
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2022-01-01
Revenue Recognition [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	12 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2023-01-01
Revenue Recognition [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	12 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2024-01-01
Revenue Recognition [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	12 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2025-01-01
Revenue Recognition [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period

Revenue Recognition - Schedule of Remaining Performance Obligations (Detail 1) $ in Thousands	Dec. 31, 2021 USD ($)
Revenue From Contract With Customer [Abstract]
Remaining performance obligations	$ 886,719

Property, Equipment and Leasehold Improvements, Net - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Property Plant And Equipment [Abstract]
Depreciation and amortization of property, equipment and leasehold improvements	$ 7,929	$ 6,809	$ 7,020	$ 7,143	$ 7,281	$ 7,494	$ 7,463	$ 7,567	$ 28,901	$ 29,805	$ 29,999

Shareholders' Equity (Deficit) - Summary of Share-based Compensation Expense (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total share-based compensation expense	$ 58,488	$ 55,617	$ 44,090
Cost of Revenues [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total share-based compensation expense	17,285	14,523	11,190
Selling and Marketing [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total share-based compensation expense	14,411	13,545	14,943
Research and Development [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total share-based compensation expense	7,913	7,344	5,966
General and Administrative [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total share-based compensation expense	17,463	19,826	$ 11,991
Other expense (income) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total share-based compensation expense	$ 1,416	$ 379

Shareholders' Equity (Deficit) - Summary of Vested and Unvested Share-Based Awards Activity (Detail) shares in Thousands	12 Months Ended
	Dec. 31, 2021 $ / shares shares
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Vested and unvested Share-based Awards at the beginning of period, Number of Shares \| shares	739
Granted, Number of Shares \| shares	330
Conversion to common stock, Number of Shares \| shares	(340)
Canceled, Number of Shares \| shares	(32)
Vested and unvested Share-based Awards at the end of period, Number of Shares \| shares	697
Vested and unvested Share-based Awards at the beginning of period, Weighted Average Grant Date Fair Value \| $ / shares	$ 163.99
Granted, Weighted Average Grant Date Fair Value \| $ / shares	265.99
Conversion to common stock, Weighted Average Grant Date Fair Value \| $ / shares	153.66
Canceled, Weighted Average Grant Date Fair Value \| $ / shares	274.66
Vested and unvested Share-based Awards at the end of period, Weighted Average Grant Date Fair Value \| $ / shares	$ 217.05

Property, Equipment and Leasehold Improvements, Net - Schedule of Property, Equipment and Leasehold Improvements, Net (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Computer & related equipment	$ 179,557	$ 186,786
Furniture & fixtures	14,194	15,276
Leasehold improvements	56,308	56,537
Work-in-process	2,699	2,996
Subtotal	252,758	261,595
Accumulated depreciation and amortization	(186,043)	(181,149)
Property, equipment and leasehold improvements, net	$ 66,715	$ 80,446
Computer & Related Equipment [Member] \| Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated Useful Lives	2 years
Computer & Related Equipment [Member] \| Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated Useful Lives	5 years
Furniture & Fixtures [Member]
Property, Plant and Equipment [Line Items]
Estimated Useful Lives	7 years
Leasehold improvements [Member] \| Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated Useful Lives	1 year
Leasehold improvements [Member] \| Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated Useful Lives	21 years

Shareholders' Equity (Deficit) - Schedule of Cash Dividends Declared and Distributed Per Common Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended												12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement Of Stockholders Equity [Abstract]
Dividend declared per common share	$ 1.04	$ 1.04	$ 0.78	$ 0.78	$ 0.78	$ 0.78	$ 0.68	$ 0.68	$ 0.68	$ 0.68	$ 0.58	$ 0.58	$ 3.64	$ 2.92	$ 2.52
Cash dividends declared, Amount	$ 86,475	$ 86,476	$ 64,863	$ 65,947	$ 65,029	$ 65,830	$ 57,360	$ 59,233	$ 58,176	$ 58,176	$ 49,613	$ 55,339	$ 303,761	$ 247,452	$ 221,304
Cash dividends distributed, Amount	85,973	85,961	64,489	66,153	64,653	65,454	57,068	59,455	57,916	57,882	49,365	57,988	302,576	246,630	223,151
Cash dividends (released)/deferred, Amount	$ 502	$ 515	$ 374	$ (206)	$ 376	$ 376	$ 292	$ (222)	$ 260	$ 294	$ 248	$ (2,649)	$ 1,185	$ 822	$ (1,847)

Income Taxes - Reconciliation of U.S. Federal Statutory Income Tax Rate to the Effective Tax Rate (Parenthetical) (Detail)	12 Months Ended
	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Percentage of Foreign Derived Intangible Income related to favorable impact on prior years from final regulations	(3.00%)

Consolidated Statements of Financial Condition - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 1,421,449	$ 1,300,521
Accounts receivable, net of allowances	664,511	558,569
Prepaid income taxes	5,951	20,097
Prepaid and other assets	51,499	46,411
Total current assets	2,143,410	1,925,598
Property, equipment and leasehold improvements, net	66,715	80,446
Right of use assets	144,584	153,330
Goodwill	2,236,386	1,566,022
Intangible assets, net	593,341	234,748
Equity method investment	218,763	190,898
Deferred tax assets	40,119	23,627
Other non-current assets	63,385	23,978
Total assets	5,506,703	4,198,647
Current liabilities:
Accounts payable	13,448	14,253
Income taxes payable	59,635	26,195
Accrued compensation and related benefits	207,640	161,557
Other accrued liabilities	145,302	143,894
Deferred revenue	824,912	675,870
Total current liabilities	1,250,937	1,021,769
Long-term debt	4,161,422	3,366,777
Long-term operating lease liabilities	150,029	152,342
Deferred tax liabilities	3,650	12,774
Other non-current liabilities	104,132	88,219
Total liabilities	5,670,170	4,641,881
Commitments and Contingencies (see Note 6 and Note 10)
Shareholders' equity (deficit):
Preferred Stock (par value $0.01, 100,000,000 shares authorized, no shares issued)
Common stock (par value $0.01; 750,000,000 common shares authorized; 133,162,178 and 132,829,175 common shares issued and 82,439,449 and 82,573,407 common shares outstanding at December 31, 2021 and December 31, 2020, respectively)	1,332	1,328
Treasury shares, at cost (50,722,729 and 50,255,768 common shares held at December 31, 2021 and December 31, 2020, respectively)	(4,540,144)	(4,342,535)
Additional paid-in capital	1,457,623	1,402,537
Retained earnings	2,976,517	2,554,295
Accumulated other comprehensive loss	(58,795)	(58,859)
Total shareholders' equity (deficit)	(163,467)	(443,234)
Total liabilities and shareholders' equity (deficit)	$ 5,506,703	$ 4,198,647

Revenue Recognition - Schedule of Change in Accounts Receivable and Deferred Revenue (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenue From Contract With Customer [Abstract]
Accounts receivable, balance	$ 664,511	$ 558,569	$ 499,268
Accounts receivable, Increase/(decrease)	105,942	59,301
Deferred revenue	824,912	675,870	$ 574,656
Deferred revenue, Increase/(decrease)	$ 149,042	$ 101,214

Income Taxes - Summary of Provision for Income Taxes (Benefits) by Taxing Jurisdiction (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Current, U.S. federal									$ 133,281	$ 39,665	$ 31,493
Current, U.S. state and local									49,475	29,942	6,841
Current, Non U.S.									60,766	70,441	22,103
Current provision for income taxes (benefits)									243,522	140,048	60,437
Deferred, U.S. federal									(79,812)	(44,507)	(11,941)
Deferred, U.S. state and local									(25,981)	(8,911)	(4,001)
Deferred, Non U.S.									(5,576)	(2,227)	(4,825)
Deferred provision for income taxes (benefits)									(111,369)	(55,645)	(20,767)
Provision for income taxes	$ 51,898	$ 30,774	$ 30,272	$ 19,209	$ 38,950	$ 6,685	$ 24,044	$ 14,724	$ 132,153	$ 84,403	$ 39,670

Segment Information (Tables)

12 Months Ended

Dec. 31, 2021

Segment Reporting [Abstract]

Operating Revenues by Reportable Segment

The following table presents operating revenues by reportable segment for the periods indicated:

		Years Ended
		December 31,		December 31,		December 31,
		2021		2020		2019
	(in thousands)
Operating revenues
Index		$	1,251,764	$	1,016,495	$	920,937
Analytics			544,299		513,808		496,925
ESG and Climate			166,192		111,364		90,659
All Other - Private Assets			81,289		53,723		49,275
Total		$	2,043,544	$	1,695,390	$	1,557,796

Segment Profitability and Reconciliation to Net Income

The following table presents segment profitability and a reconciliation to net income for the periods indicated:

		Years Ended
		December 31,		December 31,		December 31,
		2021		2020		2019
	(in thousands)
Index Adjusted EBITDA		$	951,312	$	766,493	$	670,188
Analytics Adjusted EBITDA			198,799		172,924		152,113
ESG and Climate Adjusted EBITDA			29,748		22,851		21,813
All Other - Private Assets Adjusted EBITDA			16,931		9,242		6,385
Total operating segment profitability			1,196,790		971,510		850,499
Amortization of intangible assets			80,592		56,941		49,410
Depreciation and amortization of property, equipment and leasehold improvements			28,901		29,805		29,999
Impairment related to sublease of leased property			7,702		—		—
Acquisition-related integration and transaction costs ⁽¹⁾			6,870		—		—
2016 Multi-Year PSUs grant payroll tax expense			—		—		15,389
Operating income			1,072,725		884,764		755,701
Other expense (income), net			214,589		198,539		152,383
Provision for income taxes			132,153		84,403		39,670
Net income		$	725,983	$	601,822	$	563,648

⁽¹⁾	Incremental and non-recurring costs attributable to acquisitions directly related to the execution of the transaction and integration of the acquired business that have occurred no later than 12 months after the close of the transaction.

Operating Revenues by Geographic Area

Operating revenues by geography are based on the shipping address of the ultimate customer utilizing the product. The following table presents revenue by geographic area for the periods indicated:

	Years Ended
	December 31,		December 31,		December 31,
(in thousands)	2021			2020	2019
Operating revenues
Americas:
United States	$	836,880	$	723,962	$	698,105
Other		85,744		71,408		65,997
Total Americas		922,624		795,370		764,102
Europe, the Middle East and Africa ("EMEA"):
United Kingdom		344,976		262,188		234,926
Other		454,239		364,547		325,221
Total EMEA		799,215		626,735		560,147
Asia & Australia:
Japan		91,419		80,591		71,629
Other		230,286		192,694		161,918
Total Asia & Australia		321,705		273,285		233,547
Total	$	2,043,544	$	1,695,390	$	1,557,796

Long-Lived Assets by Geographic Area

Long-lived assets consist of property, equipment and leasehold improvements, right of use assets and internally developed capitalized software, net of accumulated depreciation and amortization. The following table presents long-lived assets by geographic area on the dates indicated:

	As of
	December 31,		December 31,
	2021		2020
	(in thousands)
Long-lived assets
Americas:
United States	$	167,870	$	182,776
Other		13,480		13,949
Total Americas		181,350		196,725
EMEA:
United Kingdom		19,563		19,678
Other		34,240		33,561
Total EMEA		53,803		53,239
Asia & Australia:
Japan		1,150		1,896
Other		31,873		37,946
Total Asia & Australia		33,023		39,842
Total	$	268,176	$	289,806

Introduction and Basis of Presentation (Policies)

12 Months Ended

Dec. 31, 2021

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Basis of Presentation

Basis of Financial Statements and Use of Estimates

Revenue Recognition

Performance Obligations and Transaction Price

Disaggregation of Revenue

Revenues By Type

Revenues By Segment

complete and the related service is available for the client to use. Operating revenues are recognized at the point in time when the implementation service is completed.

Share-Based Compensation

Research and Development

Internal Use Software

Costs incurred in the preliminary and post-implementation stages of MSCI’s products are expensed as incurred.

Income Taxes

Deferred Revenue

Accounts Receivable and Allowance for Doubtful Accounts

Changes in the allowance for doubtful accounts from December 31, 2018 to December 31, 2021 were as follows:

	Amount
	(in thousands)
Balance as of December 31, 2018	$	1,027
Addition (reduction) to credit loss expense		1,024
Write-offs, net of recoveries		(336	)
Balance as of December 31, 2019	$	1,715
Addition (reduction) to credit loss expense		1,712
Adjustments and write-offs, net of recoveries		(1,844	)
Balance as of December 31, 2020	$	1,583
Addition (reduction) to credit loss expense		1,210
Adjustments and write-offs, net of recoveries		(456	)
Balance as of December 31, 2021	$	2,337

Goodwill

Intangible Assets

The Company had no indefinite-lived intangible assets.

Foreign Currency Translation

Leases

Property, Equipment and Leasehold Improvements

Treasury Stock

Accrued Compensation

Concentrations

Recent Accounting Standards Updates

In October 2021, the FASB issued Accounting Standards Update No. 2021-08, “Business Combinations (Topic 805): Accounting for Contract Assets and Contract Liabilities from Contracts with Customers,” or ASU 2021-08, which requires contract assets and contract liabilities acquired in a business combination to be recognized in accordance with ASC Topic 606. The Company early adopted ASU 2021-08 as of the issuance date and is therefore required to retrospectively apply the standard to business combinations which occurred this fiscal year. The Company’s adoption of the standard resulted in recognition of an additional $7.0 million in deferred revenue and a reduction in deferred tax liabilities of $1.8 million as of September 13, 2021, associated with the acquisition of Real Capital Analytics, Inc. (“RCA”).

Commitments and Contingencies - Schedule of Senior Unsecured Notes (Parenthetical) (Detail)	Dec. 31, 2021	Aug. 17, 2021	May 14, 2021	Mar. 26, 2021	May 26, 2020	Mar. 04, 2020
4.75% Senior Unsecured Notes Due 2026 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	4.75%			4.75%
5.375% Senior Unsecured Notes Due 2027 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	5.375%	5.375%
4.000% Senior Unsecured Notes Due 2029 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	4.00%
3.625% Senior Unsecured Notes Due 2030 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	3.625%			3.625%		3.625%
3.875% Senior Unsecured Notes Due 2031 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	3.875%				3.875%
3.625% Senior Unsecured Notes Due 2031 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	3.625%		3.625%
3.250% Senior Unsecured Notes Due 2033 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	3.25%	3.25%

Segment Information - Segment Profitability and Reconciliation to Net Income (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Adjusted EBITDA									$ 1,196,790	$ 971,510	$ 850,499
Amortization of intangible assets	$ 21,023	$ 14,105	$ 30,396	$ 15,068	$ 14,770	$ 14,333	$ 14,062	$ 13,776	80,592	56,941	49,410
Depreciation and amortization of property, equipment and leasehold improvements	7,929	6,809	7,020	7,143	7,281	7,494	7,463	7,567	28,901	29,805	29,999
Impairment related to sublease of leased property									7,702
Acquisition-related integration and transaction costs									6,870
2016 Multi-Year PSUs grant payroll tax expense											15,389
Operating income	280,587	280,230	257,533	254,375	234,085	227,620	215,175	207,884	1,072,725	884,764	755,701
Other expense (income), net	34,824	79,580	61,838	38,347	38,919	38,577	76,008	45,035	214,589	198,539	152,383
Provision for income taxes	51,898	30,774	30,272	19,209	38,950	6,685	24,044	14,724	132,153	84,403	39,670
Net income	$ 193,865	$ 169,876	$ 165,423	$ 196,819	$ 156,216	$ 182,358	$ 115,123	$ 148,125	725,983	601,822	563,648
Index [Member]
Segment Reporting Information [Line Items]
Adjusted EBITDA									951,312	766,493	670,188
Analytics [Member]
Segment Reporting Information [Line Items]
Adjusted EBITDA									198,799	172,924	152,113
ESG and Climate [Member]
Segment Reporting Information [Line Items]
Adjusted EBITDA									29,748	22,851	21,813
All Other - Private Assets [Member]
Segment Reporting Information [Line Items]
Adjusted EBITDA									$ 16,931	$ 9,242	$ 6,385

Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2021

Commitments And Contingencies Disclosure [Abstract]

Schedule of Senior Unsecured Notes

The Company had an aggregate of $4,200.0 million in senior unsecured notes (collectively, the “Senior Notes”) outstanding at December 31, 2021, as presented in the table below:

		Principal amount outstanding at		Carrying value at		Carrying value at		Fair Value at		Fair Value at
	Maturity Date	December 31, 2021		December 31, 2021		December 31, 2020		December 31, 2021		December 31, 2020
	(in thousands)
Long-term debt
4.750% senior unsecured notes due 2026	August 1, 2026		-		-		496,257		-		522,325
5.375% senior unsecured notes due 2027	May 15, 2027		-		-		495,819		-		538,100
4.000% senior unsecured notes due 2029	November 15, 2029		1,000,000		991,455		990,364		1,047,950		1,073,040
3.625% senior unsecured notes due 2030	September 1, 2030		900,000		894,263		395,458		924,777		419,428
3.875% senior unsecured notes due 2031	February 15, 2031		1,000,000		989,973		988,879		1,046,620		1,063,430
3.625% senior unsecured notes due 2031	November 1, 2031		600,000		593,538		-		625,536		-
3.250% senior unsecured notes due 2033	August 15, 2033		700,000		692,193		-		710,906		-
Total long-term debt		$	4,200,000	$	4,161,422	$	3,366,777	$	4,355,789	$	3,616,323

Schedule of Interest Payments Due Attributable to Senior Notes

Interest payments attributable to the Senior Notes are due as presented in the following table:

	First semi-annual interest payment date	Second semi- annual interest payment date
Senior Notes
4.000% senior unsecured notes due 2029	May 15	November 15
3.625% senior unsecured notes due 2030	March 1	September 1
3.875% senior unsecured notes due 2031	June 1	December 1
3.625% senior unsecured notes due 2031⁽¹⁾	May 1	November 1
3.250% senior unsecured notes due 2033⁽²⁾	February 15	August 15

⁽¹⁾The first payment occurred on November 1, 2021.

⁽²⁾The first payment occuring on February 15, 2022.

- Definition

Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer.

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+ Details

Employee Benefits - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Fair value of the defined benefit plan assets	$ 30.2	$ 28.5
Switzerland Defined Benefit Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Minimum investment return rate	1.00%	1.00%	1.00%
Defined benefit plan, net pension liability	$ 34.0	$ 34.8
Defined benefit plan, assets	26.1	24.6
Pension related net period benefit expense	$ 0.3	$ 0.5	$ 1.0
Discount rate	0.30%	0.10%
Other Non-Current Liabilities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, non-current liability	$ 34.5	$ 36.1

Earnings Per Common Share - Computation of Basic and Diluted EPS (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Earnings Per Share [Abstract]
Net income	$ 193,865	$ 169,876	$ 165,423	$ 196,819	$ 156,216	$ 182,358	$ 115,123	$ 148,125	$ 725,983	$ 601,822	$ 563,648
Basic weighted average common shares outstanding	82,473	82,470	82,454	82,640	82,737	83,602	83,666	84,870	82,508	83,716	84,644
Effect of dilutive securities:
Stock options, RSUs and PSUs									971	801	892
Diluted weighted average common shares outstanding	83,578	83,554	83,295	83,493	83,707	84,479	84,349	85,548	83,479	84,517	85,536
Earnings per basic common share	$ 2.35	$ 2.06	$ 2.01	$ 2.38	$ 1.89	$ 2.18	$ 1.38	$ 1.75	$ 8.80	$ 7.19	$ 6.66
Earnings per diluted common share	$ 2.32	$ 2.03	$ 1.99	$ 2.36	$ 1.87	$ 2.16	$ 1.36	$ 1.73	$ 8.70	$ 7.12	$ 6.59

- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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+ Details

Shareholders' Equity (Deficit) - Summary of Fair Value of PSUs on the Award Dates Estimated Under the Monte Carlo Method Assumptions (Detail)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Risk free interest rate	0.33%	1.28%	2.46%
Historical stock price volatility	34.13%	25.42%	21.98%
Term (in years)	4 years	3 years 9 months 18 days	3 years 8 months 12 days
Discount of Lack of Marketability	4.00%	0.00%	0.00%

Goodwill and Intangible Assets, Net - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Goodwill [Line Items]
Amortization of intangible assets	$ 21,023	$ 14,105	$ 30,396	$ 15,068	$ 14,770	$ 14,333	$ 14,062	$ 13,776	$ 80,592	$ 56,941	$ 49,410
Gross intangible assets	1,270,848				878,273				1,270,848	878,273
Accumulated amortization	677,507				$ 643,525				677,507	$ 643,525
Write Off of Internally Developed Capitalized Software [Member]
Goodwill [Line Items]
Amortization of intangible assets									16,013
Gross intangible assets	46,300								46,300
Accumulated amortization	$ 30,300								$ 30,300

Leases - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Lessee Lease Description [Line Items]
Operating lease, expense	$ 30,600	$ 32,800	$ 35,600
Operating lease, existence of option to extend	true
Operating lease, options to extend	Some of these leases have options to extend which, if exercised, would extend the maximum term to approximately 25 years.
Operating lease, existence of option to terminate	true
Operating lease, options to terminate	Some of the leases also provide for early termination, the exercise of which would shorten the term of those leases by up to 5 years.
Loss on impairment of right of use assets	$ 8,385
General and Administrative Expense [Member]
Lessee Lease Description [Line Items]
Loss on impairment of right of use assets	$ 8,400
Maximum [Member]
Lessee Lease Description [Line Items]
Operating lease, remaining lease terms	11 years
Operating lease, extended term	25 years
Operating lease, early termination term	5 years

Subsequent Events - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands, shares in Millions		1 Months Ended	3 Months Ended												12 Months Ended
	Jan. 24, 2022	Feb. 10, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Subsequent Event [Line Items]
Common stock repurchased, total value															$ 139,580	$ 727,343	$ 102,081
Quarterly dividend declared			$ 1.04	$ 1.04	$ 0.78	$ 0.78	$ 0.78	$ 0.78	$ 0.68	$ 0.68	$ 0.68	$ 0.68	$ 0.58	$ 0.58	$ 3.64	$ 2.92	$ 2.52
Subsequent Event [Member]
Subsequent Event [Line Items]
Common stock repurchased, shares		1.2
Common stock repurchased, average price per share		$ 515.83
Common stock repurchased, total value		$ 634,100
Quarterly dividend declared	$ 1.04
Quarterly dividend declared date	Jan. 24, 2022
Quarterly dividend payable date	Feb. 28, 2022
Quarterly dividend record date	Feb. 18, 2022

Income Taxes - Summary of Components of Income Before Provision for Income Taxes (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Domestic									$ 417,679	$ 353,049	$ 351,177
Foreign									440,457	333,176	252,141
Income before provision for income taxes	$ 245,763	$ 200,650	$ 195,695	$ 216,028	$ 195,166	$ 189,043	$ 139,167	$ 162,849	$ 858,136	$ 686,225	$ 603,318

- Definition

Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.

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+ Details

Income Taxes (Tables)

12 Months Ended

Dec. 31, 2021

Income Tax Disclosure [Abstract]

Summary of Provision for Income Taxes (Benefits) by Taxing Jurisdiction

The provision for income taxes (benefits) by taxing jurisdiction consisted of:

	Years Ended
	December 31,			December 31,			December 31,
	2021			2020			2019
	(in thousands)
Current
U.S. federal	$	133,281		$	39,665		$	31,493
U.S. state and local		49,475			29,942			6,841
Non U.S.		60,766			70,441			22,103
		243,522			140,048			60,437
Deferred
U.S. federal		(79,812	)		(44,507	)		(11,941	)
U.S. state and local		(25,981	)		(8,911	)		(4,001	)
Non U.S.		(5,576	)		(2,227	)		(4,825	)
		(111,369	)		(55,645	)		(20,767	)

Provision for income taxes	$	132,153		$	84,403		$	39,670

Reconciliation of U.S. Federal Statutory Income Tax Rate to the Effective Tax Rate

The following table reconciles the U.S. federal statutory income tax rate to the effective income tax rate:

	Years Ended
	December 31,			December 31,			December 31,
	2021			2020			2019
U.S. federal statutory income tax rate		21.00	%		21.00	%		21.00	%
U.S. state and local income taxes, net of U.S. federal income tax benefits		2.90	%		3.14	%		2.51	%
Change in tax rates applicable to non-U.S. earnings		(5.09	%)		(3.30	%)		(3.74	%)
Foreign Derived Intangible Income (FDII), net of GILTI ⁽¹⁾		(1.09	%)		(3.84	%)		1.05	%
Domestic tax credits and incentives		(0.59	%)		(0.59	%)		(0.31	%)
Valuation allowance		—	%		—	%		(0.10	%)
Excess share-based compensation		(2.65	%)		(3.24	%)		(13.94	%)
Other		0.92	%		(0.87	%)		0.11	%
Effective income tax rate		15.40	%		12.30	%		6.58	%

⁽¹⁾	The year ended December 31, 2020 includes (3.00%) released during the year related to the favorable impact on prior years from final regulations clarifying certain provisions of the Tax Cuts and Jobs Act (“Tax Reform”).

Significant Components of Deferred Tax Assets and Liabilities

Significant components of the Company’s deferred tax assets and liabilities as of December 31, 2021 and 2020, were as follows:

	As of
	December 31,			December 31,
	2021			2020
	(in thousands)
Deferred tax assets:
Capitalized expenses	$	94,265		$	—
Unearned revenue		56,810			46,530
Lease liabilities		39,507			40,786
Employee compensation and benefit plans		20,216			20,602
Interest expense carryforwards		11,215			7,901
Loss carryforwards		18,173			3,071
Pension		2,229			3,066
Other		3,509			—
Subtotal		245,924			121,956
Less: valuation allowance		(36	)		—
Total deferred tax assets	$	245,888		$	121,956
Deferred tax liabilities:
Intangible assets	$	(147,118	)	$	(51,862	)
Right of use assets		(32,106	)		(35,634	)
Property, equipment and leasehold improvements, net		(27,136	)		(20,197	)
Unremitted foreign earnings		(3,059	)		(1,279	)
Unearned revenue		—			—
Other		—			(2,131	)
Total deferred tax liabilities	$	(209,419	)	$	(111,103	)
Net deferred tax assets	$	36,469		$	10,853

Summary of Deferred Tax Asset Valuation Allowance

The following table presents changes in the Company’s deferred tax asset valuation allowance for the periods indicated:

	Years Ended
	December 31,		December 31,		December 31,
	2021		2020		2019
	(in thousands)
Beginning balance	$	—	$	—	$	632
Additions charged to cost and expenses		36		—		—
Deductions		—		—		(632	)
Ending balance	$	36	$	—	$	—

Summary of Components of Income Before Provision for Income Taxes

The following table presents the components of income before provision for income taxes generated by domestic or foreign operations for the periods indicated:

	Years Ended
	December 31,		December 31,		December 31,
	2021		2020		2019
	(in thousands)
Domestic	$	417,679	$	353,049	$	351,177
Foreign ⁽¹⁾		440,457		333,176		252,141
Total income before provision for income taxes	$	858,136	$	686,225	$	603,318

⁽¹⁾	Foreign income before provision for income taxes is defined as income generated from operations located outside the U.S., which includes income from foreign branches of U.S. companies.

Reconciliation of Unrecognized Tax Benefits

The following table presents a reconciliation of the beginning and ending amount of the gross unrecognized tax benefits, excluding interest and penalties, for the years ended December 31, 2021, 2020 and 2019:

	Years Ended
Gross unrecognized tax benefits	December 31,			December 31,			December 31,
(in thousands)	2021			2020			2019
Beginning balance	$	16,621		$	15,841		$	14,091
Increases based on tax positions related to the current period		511			292			2,413
Increases based on tax positions related to prior periods		20,321			2,099			—
Decreases based on tax positions related to prior periods		—			—			—
Decreases related to settlements with taxing authorities		—			—			—
Decreases related to a lapse of applicable statute of limitations		(4,414	)		(1,611	)		(663	)
Ending balance	$	33,039		$	16,621		$	15,841

Consolidated Statements of Cash Flows $ in Thousands	12 Months Ended
Consolidated Statements of Cash Flows $ in Thousands	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Cash flows from operating activities
Net income	$ 725,983	$ 601,822	$ 563,648
Adjustments to reconcile net income to net cash provided by operating activities:
Amortization of intangible assets	80,592	56,941	49,410
Stock-based compensation expense	54,917	51,094	41,199
Depreciation and amortization of property, equipment and leasehold improvements	28,901	29,805	29,999
Amortization of right of use assets	24,632	24,049	22,489
Loss on impairment of right of use assets	8,385
Amortization of debt origination fees	4,923	4,445	4,073
Loss on extinguishment of debt	59,103	44,930	16,794
Deferred taxes	(111,369)	(55,645)	(20,767)
Other adjustments	(146)	1,744	1,093
Changes in assets and liabilities, net of the effect of acquisitions and dispositions:
Accounts receivable	(99,203)	(57,606)	(25,923)
Prepaid income taxes	15,264	11,608	(13,200)
Prepaid and other assets	(4,240)	(410)	(7,698)
Other non-current assets	(35,445)	(3,792)	(239)
Accounts payable	(2,195)	7,482	2,584
Income taxes payable	33,903	9,576	(2,240)
Accrued compensation and related benefits	42,719	(2,641)	25,217
Other accrued liabilities	(9,249)	1,674	3,664
Deferred revenue	116,863	98,330	35,366
Long-term operating lease liabilities	(22,078)	(22,497)	(20,244)
Other non-current liabilities	21,536	6,536	3,851
Other	2,273	3,664	447
Net cash provided by operating activities	936,069	811,109	709,523
Cash flows from investing activities
Acquisition of a business, net of cash acquired	(948,989)		(18,177)
Acquisition of equity method investment	(26,361)	(190,816)
Acquisition of assets, net of cash acquired	(6,512)
Capital expenditures	(13,509)	(21,826)	(29,116)
Capitalized software development costs	(39,285)	(29,149)	(24,654)
Other	(1,057)		10
Net cash used in investing activities	(1,035,713)	(241,791)	(71,937)
Cash flows from financing activities
Proceeds from borrowings, inclusive of premium	1,803,750	1,405,000	1,000,000
Repayment of borrowings	(1,051,810)	(1,142,382)	(513,125)
Repurchase of common stock held in treasury	(198,374)	(778,519)	(292,075)
Payment of dividends	(302,449)	(246,444)	(222,922)
Payment of debt issuance costs in connection with debt	(21,612)	(16,693)	(11,781)
Proceeds from exercise of stock options			3,236
Net cash provided by (used in) financing activities	229,505	(779,038)	(36,667)
Effect of exchange rate changes	(8,933)	3,674	1,472
Net (decrease) increase in cash	120,928	(206,046)	602,391
Cash and cash equivalent, beginning of period	1,300,521	1,506,567	904,176
Cash and cash equivalent, end of period	1,421,449	1,300,521	1,506,567
Supplemental disclosure of cash flow information:
Cash paid for interest	151,335	163,391	141,484
Cash paid for income taxes, net of refunds received	222,620	113,646	72,935
Supplemental disclosure of non-cash investing activities
Property, equipment and leasehold improvements in other accrued liabilities	3,498	3,061	3,690
Supplemental disclosure of non-cash financing activities
Cash dividends declared, but not yet paid	$ 2,599	$ 1,438	$ 1,039

Income Taxes

12 Months Ended

Dec. 31, 2021

Income Tax Disclosure [Abstract]

Income Taxes

12. INCOME TAXES

The provision for income taxes (benefits) by taxing jurisdiction consisted of:

	Years Ended
	December 31,			December 31,			December 31,
	2021			2020			2019
	(in thousands)
Current
U.S. federal	$	133,281		$	39,665		$	31,493
U.S. state and local		49,475			29,942			6,841
Non U.S.		60,766			70,441			22,103
		243,522			140,048			60,437
Deferred
U.S. federal		(79,812	)		(44,507	)		(11,941	)
U.S. state and local		(25,981	)		(8,911	)		(4,001	)
Non U.S.		(5,576	)		(2,227	)		(4,825	)
		(111,369	)		(55,645	)		(20,767	)

Provision for income taxes	$	132,153		$	84,403		$	39,670

The following table reconciles the U.S. federal statutory income tax rate to the effective income tax rate:

	Years Ended
	December 31,			December 31,			December 31,
	2021			2020			2019
U.S. federal statutory income tax rate		21.00	%		21.00	%		21.00	%
U.S. state and local income taxes, net of U.S. federal income tax benefits		2.90	%		3.14	%		2.51	%
Change in tax rates applicable to non-U.S. earnings		(5.09	%)		(3.30	%)		(3.74	%)
Foreign Derived Intangible Income (FDII), net of GILTI ⁽¹⁾		(1.09	%)		(3.84	%)		1.05	%
Domestic tax credits and incentives		(0.59	%)		(0.59	%)		(0.31	%)
Valuation allowance		—	%		—	%		(0.10	%)
Excess share-based compensation		(2.65	%)		(3.24	%)		(13.94	%)
Other		0.92	%		(0.87	%)		0.11	%
Effective income tax rate		15.40	%		12.30	%		6.58	%

⁽¹⁾	The year ended December 31, 2020 includes (3.00%) released during the year related to the favorable impact on prior years from final regulations clarifying certain provisions of the Tax Cuts and Jobs Act (“Tax Reform”).

Deferred income taxes reflect the net tax effects of temporary differences between the financial reporting and tax bases of assets and liabilities and are measured using the enacted tax rates and laws that will be in effect when such differences are expected to reverse. Significant components of the Company’s deferred tax assets and liabilities as of December 31, 2021 and 2020, were as follows:

	As of
	December 31,			December 31,
	2021			2020
	(in thousands)
Deferred tax assets:
Capitalized expenses	$	94,265		$	—
Unearned revenue		56,810			46,530
Lease liabilities		39,507			40,786
Employee compensation and benefit plans		20,216			20,602
Interest expense carryforwards		11,215			7,901
Loss carryforwards		18,173			3,071
Pension		2,229			3,066
Other		3,509			—
Subtotal		245,924			121,956
Less: valuation allowance		(36	)		—
Total deferred tax assets	$	245,888		$	121,956
Deferred tax liabilities:
Intangible assets	$	(147,118	)	$	(51,862	)
Right of use assets		(32,106	)		(35,634	)
Property, equipment and leasehold improvements, net		(27,136	)		(20,197	)
Unremitted foreign earnings		(3,059	)		(1,279	)
Unearned revenue		—			—
Other		—			(2,131	)
Total deferred tax liabilities	$	(209,419	)	$	(111,103	)
Net deferred tax assets	$	36,469		$	10,853

As presented in the table above, the Company has certain loss and interest carryforward items. The tax value of the U.S. portion of the interest carryforward was zero and $0.7 million as of December 31, 2021 and December 31, 2020, respectively. The tax value of the non-U.S. portion of the interest carryforward was $11.2 million and $7.2 million as of December 31, 2021 and December 31, 2020, respectively. These carryforwards are subject to annual limitations on utilization over an indefinite life.

Net operating loss carryforwards in the U.S. were $69.7 million with a tax value of $17.9 million and $8.7 million with a tax value of $1.8 million as of December 31, 2021 and December 31, 2020, respectively. The increase in the net operating loss carryforward in the U.S. is primarily attributable to the September 13, 2021 acquisition of RCA. These carryforwards are subject to annual limitations and will begin to expire in 2026. The tax value of the non-U.S. portion of the net operating loss was $0.3 million and $1.2 million as of December 31, 2021 and December 31, 2020 respectively. These carryforwards are subject to annual limitations and will begin to expire in 2023.

The Company believes the majority of the deferred tax assets at December 31, 2021 are more likely than not to be realized based on expectations as to future taxable income in the jurisdictions in which it operates with the exception of a loss carryforward in one jurisdiction where it has established a valuation allowance of $0.04 million.

As of December 31, 2021, the Company has recorded prepayments of taxes in the amount of $36.5 million in “Other non-current assets” on the Consolidated Statements of Financial Condition, as the amounts are not anticipated to be received until after December 31, 2022.

The following table presents changes in the Company’s deferred tax asset valuation allowance for the periods indicated:

	Years Ended
	December 31,		December 31,		December 31,
	2021		2020		2019
	(in thousands)
Beginning balance	$	—	$	—	$	632
Additions charged to cost and expenses		36		—		—
Deductions		—		—		(632	)
Ending balance	$	36	$	—	$	—

The following table presents the components of income before provision for income taxes generated by domestic or foreign operations for the periods indicated:

	Years Ended
	December 31,		December 31,		December 31,
	2021		2020		2019
	(in thousands)
Domestic	$	417,679	$	353,049	$	351,177
Foreign ⁽¹⁾		440,457		333,176		252,141
Total income before provision for income taxes	$	858,136	$	686,225	$	603,318

⁽¹⁾	Foreign income before provision for income taxes is defined as income generated from operations located outside the U.S., which includes income from foreign branches of U.S. companies.

As of December 31, 2021, the Company has provided for applicable state income and foreign withholding taxes on all undistributed earnings of its foreign subsidiaries.

The Company regularly assesses the likelihood of additional assessments in each of the taxing jurisdictions in which it files income tax returns. The Company has established unrecognized tax benefits that the Company believes are adequate in relation to the potential for additional assessments. Once established, the Company adjusts unrecognized tax benefits only when more information is available or when an event occurs necessitating a change. Based on the current status of income tax audits, the Company believes it is reasonably possible that the total amount of unrecognized benefits may decrease by approximately $31.6 million in the next twelve months as a result of the resolution of tax examinations.

The Company believes the resolution of tax matters will not have a material effect on the Consolidated Statement of Financial Condition of the Company, although a resolution could have a material impact on the Company’s Consolidated Statement of Income for a particular future period and on the Company’s effective tax rate for any period in which such resolution occurs.

	Years Ended
Gross unrecognized tax benefits	December 31,			December 31,			December 31,
(in thousands)	2021			2020			2019
Beginning balance	$	16,621		$	15,841		$	14,091
Increases based on tax positions related to the current period		511			292			2,413
Increases based on tax positions related to prior periods		20,321			2,099			—
Decreases based on tax positions related to prior periods		—			—			—
Decreases related to settlements with taxing authorities		—			—			—
Decreases related to a lapse of applicable statute of limitations		(4,414	)		(1,611	)		(663	)
Ending balance	$	33,039		$	16,621		$	15,841

The total amount of unrecognized tax benefits was $33.0 million, $16.6 million and $15.8 million as of December 31, 2021, 2020 and 2019, respectively, which, if recognized, would favorably affect the effective tax rate in future periods. The increase in unrecognized tax benefits in the year ended December 31, 2021 is principally due to the filing of prior year refund claims. The Company recognizes the accrual of interest and penalties related to unrecognized tax benefits in the “Provision for income taxes” in the Consolidated Statement of Income. For the years ended December 31, 2021 and 2020, the Company recognized zero and for the year ended December 31, 2019, the Company recognized $0.4 million of interest in the Consolidated Statement of Income with respect to unrecognized tax benefits. Penalties of $0.3 million, $0.4 million and zero were recognized in the Consolidated Statement of Income and the Consolidated Statement of Financial Position for the years ended December 31, 2021, 2020 and 2019, respectively. The amount of accrued interest, which includes interest related to uncertain tax positions and accrued income tax expense, recorded on the Consolidated Statement of Financial Condition as of December 31, 2021, 2020 and 2019 was $0.9 million.

The Company is under examination by tax authorities in certain jurisdictions, including foreign jurisdictions, such as the United Kingdom, Switzerland and India, and states in the U.S. in which the Company has significant operations, such as New York and California. The tax years currently under examination vary by jurisdiction but include years ranging from 2008 through 2020.

- Definition

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 21
-URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32857-109319

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SAB Topic 11.C)
-URI http://asc.fasb.org/extlink&oid=122134291&loc=d3e330215-122817

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 17
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32809-109319

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB TOPIC 6.I.5.Q1)
-URI http://asc.fasb.org/extlink&oid=122134291&loc=d3e330036-122817

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 14
-URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32705-109319

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 270
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6424409&loc=d3e44925-109338

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-URI http://asc.fasb.org/topic&trid=2144680

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6424122&loc=d3e41874-109331

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(h)(2))
-URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690

+ Details

Leases (Tables)

12 Months Ended

Dec. 31, 2021

Leases [Abstract]

Summary of Future Minimum Commitments Under Operating Leases

Future minimum commitments for the Company’s operating leases in place as of December 31, 2021, the interest and other relevant line items in the Consolidated Statement of Financial Condition are as follows:

Maturity of Lease Liabilities	Operating
(in thousands)	Leases
2022	$	28,271
2023		29,427
2024		23,924
2025		22,717
2026		20,447
Thereafter		73,539
Total lease payments	$	198,325
Less: Interest		(24,972	)
Present value of lease liabilities	$	173,353

Other accrued liabilities	$	23,324
Long-term operating lease liabilities	$	150,029

Summary of Lease Term and Discount Rate Under Operating Leases

The following table presents the lease term and discount rate for the Company’s operating leases in place as of the periods indicated:

	As of
	December 31,			December 31,
Lease Term and Discount Rate	2021			2020
Weighted-average remaining lease term (years)		8.16			8.93
Weighted-average discount rate		3.09	%		3.34	%

Summary of Other Information Under Operating Leases

The following table presents other information for the Company’s operating leases in place for the periods indicated:

	Years Ended
Other Information	December 31,		December 31,		December 31,
(in thousands)	2021		2020		2019
Operating cash flows used for operating leases	$	30,972	$	30,061	$	29,886
Right of use assets obtained in exchange for new operating lease liabilities	$	26,004	$	11,472	$	210,784

Leases

12 Months Ended

Dec. 31, 2021

Leases [Abstract]

Leases

7. LEASES

The Company recognized $30.6 million, $32.8 million and $35.6 million of operating lease expenses for the years ended December 31, 2021, 2020 and 2019, respectively. The amounts associated with variable lease costs, short-term lease costs and sublease income were not material for any of the years ended December 31, 2021, 2020 and 2019.

The Company’s leases have remaining lease terms of up to approximately 11 years. Some of these leases have options to extend which, if exercised, would extend the maximum term to approximately 25 years. Some of the leases also provide for early termination, the exercise of which would shorten the term of those leases by up to 5 years.

The Company recorded pre-tax impairment charges for the year ended December 31, 2021 of $8.4 million associated with right of use assets. The impairment charges are included in General and administrative expenses within the consolidated statements of income.

Maturity of Lease Liabilities	Operating
(in thousands)	Leases
2022	$	28,271
2023		29,427
2024		23,924
2025		22,717
2026		20,447
Thereafter		73,539
Total lease payments	$	198,325
Less: Interest		(24,972	)
Present value of lease liabilities	$	173,353

Other accrued liabilities	$	23,324
Long-term operating lease liabilities	$	150,029

The following table presents the lease term and discount rate for the Company’s operating leases in place as of the periods indicated:

	As of
	December 31,			December 31,
Lease Term and Discount Rate	2021			2020
Weighted-average remaining lease term (years)		8.16			8.93
Weighted-average discount rate		3.09	%		3.34	%

The following table presents other information for the Company’s operating leases in place for the periods indicated:

	Years Ended
Other Information	December 31,		December 31,		December 31,
(in thousands)	2021		2020		2019
Operating cash flows used for operating leases	$	30,972	$	30,061	$	29,886
Right of use assets obtained in exchange for new operating lease liabilities	$	26,004	$	11,472	$	210,784

Goodwill and Intangible Assets, Net - Schedule of Amortization Expense Related to Intangible Assets by Category (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Finite Lived Intangible Assets [Line Items]
Amortization of intangible assets	$ 21,023	$ 14,105	$ 30,396	$ 15,068	$ 14,770	$ 14,333	$ 14,062	$ 13,776	$ 80,592	$ 56,941	$ 49,410
Acquired Intangible Assets [Member]
Finite Lived Intangible Assets [Line Items]
Amortization of intangible assets									42,242	34,049	34,773
Capitalized Software [Member]
Finite Lived Intangible Assets [Line Items]
Amortization of intangible assets									22,337	$ 22,892	$ 14,637
Write Off of Internally Developed Capitalized Software [Member]
Finite Lived Intangible Assets [Line Items]
Amortization of intangible assets									$ 16,013

Earnings Per Common Share

12 Months Ended

Dec. 31, 2021

Earnings Per Share [Abstract]

Earnings Per Common Share

4. EARNINGS PER COMMON SHARE

Basic earnings per share (“EPS”) is computed by dividing net income by the weighted average number of common shares outstanding during the period. Common shares outstanding include common stock and vested restricted stock unit awards where recipients have satisfied the explicit vesting terms. Diluted EPS reflects the assumed conversion of all dilutive securities.

The following table presents the computation of basic and diluted EPS:

	Years Ended
	December 31,		December 31,		December 31,
	2021		2020		2019
(in thousands, except per share data)
Net income	$	725,983	$	601,822	$	563,648

Basic weighted average common shares outstanding		82,508		83,716		84,644
Effect of dilutive securities:
Stock options, RSUs and PSUs		971		801		892
Diluted weighted average common shares outstanding		83,479		84,517		85,536

Earnings per basic common share	$	8.80	$	7.19	$	6.66

Earnings per diluted common share	$	8.70	$	7.12	$	6.59

Leases - Summary of Lease Term and Discount Rate Under Operating Lease (Detail)	Dec. 31, 2021	Dec. 31, 2020
Leases [Abstract]
Weighted-average remaining lease term (years)	8 years 1 month 28 days	8 years 11 months 4 days
Weighted-average discount rate	3.09%	3.34%

Introduction and Basis of Presentation (Tables)

12 Months Ended

Dec. 31, 2021

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Changes in Allowance for Doubtful Accounts

Changes in the allowance for doubtful accounts from December 31, 2018 to December 31, 2021 were as follows:

	Amount
	(in thousands)
Balance as of December 31, 2018	$	1,027
Addition (reduction) to credit loss expense		1,024
Write-offs, net of recoveries		(336	)
Balance as of December 31, 2019	$	1,715
Addition (reduction) to credit loss expense		1,712
Adjustments and write-offs, net of recoveries		(1,844	)
Balance as of December 31, 2020	$	1,583
Addition (reduction) to credit loss expense		1,210
Adjustments and write-offs, net of recoveries		(456	)
Balance as of December 31, 2021	$	2,337

Consolidated Statements of Shareholders' Equity (Deficit) (Parenthetical) - $ / shares	3 Months Ended												12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement Of Stockholders Equity [Abstract]
Dividends per common share	$ 1.04	$ 1.04	$ 0.78	$ 0.78	$ 0.78	$ 0.78	$ 0.68	$ 0.68	$ 0.68	$ 0.68	$ 0.58	$ 0.58	$ 3.64	$ 2.92	$ 2.52

Goodwill and Intangible Assets, Net

12 Months Ended

Dec. 31, 2021

Goodwill And Intangible Assets Disclosure [Abstract]

Goodwill and Intangible Assets, Net

9. GOODWILL AND INTANGIBLE ASSETS, NET

Goodwill

The following table presents goodwill by reportable segment:

(in thousands)	Index			Analytics		ESG and Climate		All Other - Private Assets				Total
Goodwill at December 31, 2019	$	1,204,694		$	290,976	$	46,612	$	20,586			$	1,562,868
Foreign exchange translation adjustment		1,064			—		1,435		655				3,154
Goodwill at December 31, 2020	$	1,205,758		$	290,976	$	48,047	$	21,241			$	1,566,022
Acquisitions		—			—		—		670,874		⁽¹⁾		670,874
Foreign exchange translation adjustment		(315	)		—		—		(195	)			(510	)
Goodwill at December 31, 2021	$	1,205,443		$	290,976	$	48,047	$	691,920			$	2,236,386

⁽¹⁾	^{Reflects the impact of the acquisition of RCA.}

Intangible Assets, Net

The following table presents the amount of amortization expense related to intangible assets by category for the periods indicated:

	Years Ended
	December 31,		December 31,		December 31,
(in thousands)	2021		2020		2019
Amortization expense of acquired intangible assets	$	42,242	$	34,049	$	34,773
Amortization expense of internally developed capitalized software		22,337		22,892		14,637
Write-off of internally developed capitalized software		16,013		—		—
Total amortization of intangible assets expense	$	80,592	$	56,941	$	49,410

Following management’s decision to discontinue development and cease related sales activities of certain Analytics segment products and transition existing customers to other product offerings, the Company wrote off $16.0 million of certain internally developed capitalized software intangible assets (consisting of $46.3 million of gross intangible assets less $30.3 million of accumulated amortization) during the year ended December 31, 2021. The non-cash charge is recorded as a component of “Amortization of intangible assets” on the Consolidated Statement of Income.

The gross carrying and accumulated amortization amounts related to the Company’s intangible assets were as follows:

		As of
	Estimated	December 31,			December 31,
	Useful Lives	2021			2020
		(in thousands)
Gross intangible assets:
Customer relationships	13 to 21 years	$	532,400		$	356,700
Proprietary data	11 to 13 years		220,639			28,627
Acquired technology and software	8 to 9 years		209,220			177,720
Trademarks	2 to 21.5 years		208,190			207,300
Internally developed capitalized software	3 to 5 years		106,181			113,188
Subtotal			1,276,630			883,535
Foreign exchange translation adjustment			(5,782	)		(5,262	)
Total gross intangible assets		$	1,270,848		$	878,273
Accumulated amortization:
Customer relationships		$	(277,865	)	$	(253,465	)
Proprietary data			(22,678	)		(15,730	)
Acquired technology and software			(175,718	)		(174,032	)
Trademarks			(152,468	)		(143,207	)
Internally developed capitalized software			(49,394	)		(57,464	)
Subtotal			(678,123	)		(643,898	)
Foreign exchange translation adjustment			616			373
Total accumulated amortization		$	(677,507	)	$	(643,525	)
Net intangible assets:
Customer relationships		$	254,535		$	103,235
Proprietary data			197,961			12,897
Acquired technology and software			33,502			3,688
Trademarks			55,722			64,093
Internally developed capitalized software			56,787			55,724
Subtotal			598,507			239,637
Foreign exchange translation adjustment			(5,166	)		(4,889	)
Total net intangible assets		$	593,341		$	234,748

Estimated amortization expense for succeeding years is presented below:

Years Ending December 31,	Amortization Expense
	(in thousands)
2022	$	87,438
2023		81,532
2024		74,370
2025		51,800
2026		36,175
Thereafter		262,026
Total	$	593,341

Recent Accounting Standards Updates - Additional Information (Details) - USD ($) $ in Thousands	Sep. 13, 2021	Dec. 31, 2021
ASU 2021-08 [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Change in accounting principle, accounting standards update, early adoption		true
Real Capital Analytics, Inc [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Deferred revenue	$ 35,194
Real Capital Analytics, Inc [Member] \| ASU 2021-08 [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Deferred revenue	7,000
Reduction in deferred tax liabilities	$ (1,800)

- Definition

Indicates (true false) whether accounting standards update was early adopted.

+ References

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+ Details

Segment Information

12 Months Ended

Dec. 31, 2021

Segment Reporting [Abstract]

Segment Information

13. SEGMENT INFORMATION

ASC Subtopic 280-10, “Segment Reporting,” establishes standards for reporting information about operating segments. Operating segments are defined as components of an enterprise about which separate financial information is available that is evaluated regularly by the chief operating decision maker, or CODM, in deciding how to allocate resources and assess performance. MSCI’s Chief Executive Officer and its President and Chief Operating Officer, who are together considered to be its CODM, review financial information presented on an operating segment basis for purposes of making operating decisions and assessing financial performance.

The CODM measures and evaluates reportable segments based on segment operating revenues as well as Adjusted EBITDA and other measures. The Company excludes the following items from segment Adjusted EBITDA: provision for income taxes, other expense (income), net, depreciation and amortization of property, equipment and leasehold improvements, amortization of intangible assets and, at times, certain other transactions or adjustments, including impairment related to sublease of leased property, certain non-recurring acquisition-related integration and transaction costs and the impact related to the vesting of multi-year restricted stock units granted in 2016 to certain senior executives that are subject to the achievement of multi-year total shareholder return targets, which are performance targets with a market condition (the “2016 Multi-Year PSUs”), that the CODM does not consider for the purposes of making decisions to allocate resources among segments or to assess segment performance. Although these amounts are excluded from segment Adjusted EBITDA, they are included in reported consolidated net income and are included in the reconciliation that follows.

The Company’s computation of segment Adjusted EBITDA may not be comparable to other similarly-titled measures computed by other companies because all companies do not calculate segment Adjusted EBITDA in the same fashion.

Operating revenues and expenses directly associated with each segment are included in determining its operating results. Other expenses that are not directly attributable to a particular segment are based upon allocation methodologies, including time estimates, revenue, headcount, sales targets, data center consumption and other relevant usage measures. Due to the integrated structure of MSCI’s business, certain costs incurred by one segment may benefit other segments. A segment may use the content and data produced by another segment without incurring an arm’s-length intersegment charge.

The CODM does not review any information regarding total assets on an operating segment basis. Operating segments do not record intersegment revenues, and, accordingly, there is none to be reported. The accounting policies for segment reporting are the same as for MSCI as a whole.

The Company has five operating segments: Index, Analytics, ESG and Climate, Real Estate and Burgiss, which are presented as the following four reportable segments: Index, Analytics, ESG and Climate and All Other – Private Assets.

Effective January 1, 2021, the Company began presenting four reportable segments with the ESG and Climate operating segment being presented as a separate reportable segment. The operating segments of Real Estate and Burgiss do not individually meet the segment reporting thresholds and have been combined and presented as part of All Other – Private Assets reportable segment. The Company’s ownership interest in Burgiss is classified as an equity-method investment. Therefore, the All Other – Private Assets segment does not include the Company’s proportionate share of operating revenues and Adjusted EBITDA related to Burgiss. The Company’s proportionate share of the income or loss from its equity-method investment in Burgiss is not a component of Adjusted EBITDA as it is reported as a component of other (expense) income, net. Prior period amounts have been recast to reflect the current presentation.

The Index operating segment offers equity and fixed income indexes. The indexes are used in many areas of the investment process, including indexed product creation (e.g., ETFs, mutual funds, annuities, futures, options, structured products, over-the-counter derivatives), performance benchmarking, portfolio construction and rebalancing, and asset allocation.

The Analytics operating segment offers risk management, performance attribution and portfolio management content, applications and services that provide clients with an integrated view of risk and return and tools for analyzing market, credit, liquidity, counterparty and climate risk across all major asset classes, spanning short-, medium- and long-term time horizons. Clients access Analytics tools and content through MSCI’s proprietary applications and application programming interfaces, third-party applications or directly through their own platforms. Additionally, the Analytics operating segment also provides various managed services to help clients operate more efficiently, including consolidation of client portfolio data from various sources, review and reconciliation of input data and results, and customized reporting.

The ESG and Climate operating segment offers products and services that help institutional investors understand how ESG and climate considerations can impact the long-term risk and return of their portfolio and individual security-level investments. In addition, the ESG and Climate operating segment provides data, ratings, research and tools to help investors navigate increasing regulation, meet new client demands and better integrate ESG and climate elements into their investment processes.

The Real Estate operating segment offers real estate market and transaction data, benchmarks, return-analytics, climate assessments and market insights for funds, investors, managers and other real estate market participants. In addition, Real Estate performance and risk analytics range from enterprise-wide to property-specific analysis. The Real Estate operating segment also provides business intelligence products to real estate owners, managers, developers and brokers worldwide. Financial results related to the acquisition of RCA have been included prospectively as a component of the Real Estate operating segment, presented as a component of the All Other – Private Assets reportable segment, as of September 13, 2021.

The Burgiss operating segment represents the Company’s equity method investment in Burgiss, a global provider of investment decision support tools for private capital.

The change in reportable segments has not resulted in any changes to MSCI’s Chief Operating Decision Maker (“CODM”) or the basis for segment profitability. The CODM continues to measure and evaluate reportable segments based on segment operating revenues as well as Adjusted EBITDA and other measures.

The following table presents operating revenues by reportable segment for the periods indicated:

		Years Ended
		December 31,		December 31,		December 31,
		2021		2020		2019
	(in thousands)
Operating revenues
Index		$	1,251,764	$	1,016,495	$	920,937
Analytics			544,299		513,808		496,925
ESG and Climate			166,192		111,364		90,659
All Other - Private Assets			81,289		53,723		49,275
Total		$	2,043,544	$	1,695,390	$	1,557,796

The following table presents segment profitability and a reconciliation to net income for the periods indicated:

		Years Ended
		December 31,		December 31,		December 31,
		2021		2020		2019
	(in thousands)
Index Adjusted EBITDA		$	951,312	$	766,493	$	670,188
Analytics Adjusted EBITDA			198,799		172,924		152,113
ESG and Climate Adjusted EBITDA			29,748		22,851		21,813
All Other - Private Assets Adjusted EBITDA			16,931		9,242		6,385
Total operating segment profitability			1,196,790		971,510		850,499
Amortization of intangible assets			80,592		56,941		49,410
Depreciation and amortization of property, equipment and leasehold improvements			28,901		29,805		29,999
Impairment related to sublease of leased property			7,702		—		—
Acquisition-related integration and transaction costs ⁽¹⁾			6,870		—		—
2016 Multi-Year PSUs grant payroll tax expense			—		—		15,389
Operating income			1,072,725		884,764		755,701
Other expense (income), net			214,589		198,539		152,383
Provision for income taxes			132,153		84,403		39,670
Net income		$	725,983	$	601,822	$	563,648

⁽¹⁾	Incremental and non-recurring costs attributable to acquisitions directly related to the execution of the transaction and integration of the acquired business that have occurred no later than 12 months after the close of the transaction.

Operating revenues by geography are based on the shipping address of the ultimate customer utilizing the product. The following table presents revenue by geographic area for the periods indicated:

	Years Ended
	December 31,		December 31,		December 31,
(in thousands)	2021			2020	2019
Operating revenues
Americas:
United States	$	836,880	$	723,962	$	698,105
Other		85,744		71,408		65,997
Total Americas		922,624		795,370		764,102
Europe, the Middle East and Africa ("EMEA"):
United Kingdom		344,976		262,188		234,926
Other		454,239		364,547		325,221
Total EMEA		799,215		626,735		560,147
Asia & Australia:
Japan		91,419		80,591		71,629
Other		230,286		192,694		161,918
Total Asia & Australia		321,705		273,285		233,547
Total	$	2,043,544	$	1,695,390	$	1,557,796

	As of
	December 31,		December 31,
	2021		2020
	(in thousands)
Long-lived assets
Americas:
United States	$	167,870	$	182,776
Other		13,480		13,949
Total Americas		181,350		196,725
EMEA:
United Kingdom		19,563		19,678
Other		34,240		33,561
Total EMEA		53,803		53,239
Asia & Australia:
Japan		1,150		1,896
Other		31,873		37,946
Total Asia & Australia		33,023		39,842
Total	$	268,176	$	289,806

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

Acquisitions

12 Months Ended

Dec. 31, 2021

Business Combinations [Abstract]

Acquisitions

5. ACQUISITIONS

On September 13, 2021, MSCI acquired all of the issued and outstanding preferred and common shares of RCA for an aggregate cash purchase price of $949.0 million. This acquisition expands MSCI’s suite of real estate solutions, providing the real estate industry with data, analytics, and support tools to manage investments and understand performance and risk, including climate risk, within their portfolios. RCA has been accounted for as a business combination using the acquisition method of accounting and has been integrated into the All Other – Private Assets reportable segment, as a component of the Real Estate operating segment. A portion of RCA’s client

agreements do not have automatic renewal clauses at the end of the subscription period. Due to the historically high retention rate and expectation that a substantial portion of the client agreements will be renewed, the associated revenue is recorded as recurring subscription revenue.

The components of the preliminary purchase price allocation were as follows:

	Estimated Useful Life	Fair Value
		(in thousands)
Accounts receivable		$	9,645
Other current assets			3,721
Property, equipment and leasehold improvements, net			1,205
Right of use assets			6,441
Other non-current assets			3,270
Deferred revenue			(35,194	)
Other current liabilities			(14,518	)
Long-term operating lease liabilities			(4,849	)
Deferred tax liabilities			(85,196	)
Intangible assets:
Proprietary data	11 Years		185,500
Customer relationships	20 Years		175,700
Acquired technology and software	9 Years		31,500
Trademarks	2 Years		890
Goodwill			670,874
Purchase price, net of cash acquired		$	948,989

The purchase price allocation is based on preliminary valuations and assessments. The estimates and assumptions used may be subject to change within the measurement period, particularly for acquired intangible assets and deferred taxes. As discussed in Note 2, the Company early adopted ASU 2021-08 which resulted in an increase to deferred revenue and goodwill and a decrease in deferred tax liabilities recorded as of the opening balance sheet date.

The Company, with the assistance of third-party valuation experts, utilized the following methodologies to estimate the fair values of acquired intangible assets: the relief from royalty method, the replacement cost method and the multi-period excess earnings method. The significant assumptions used to estimate the fair value of the acquired intangible assets included, forecasted cash flows which were determined based on certain assumptions which included, among others, projected future revenues, and expected market royalty rate, technology obsolescence rates and discount rates.

The recorded goodwill is primarily attributable to the utilization of the acquired data as well as expanded market opportunities. Goodwill attributable to the acquisition is not deductible for income tax purposes.

Revenue of RCA recognized within the consolidated financial statements subsequent to the acquisition date was $22.1 million.

Revenue Recognition - Disaggregation of Operating Revenue (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disaggregation Of Revenue [Line Items]
Operating revenues	$ 549,842	$ 517,099	$ 498,180	$ 478,423	$ 443,661	$ 425,333	$ 409,616	$ 416,780	$ 2,043,544	$ 1,695,390	$ 1,557,796
Index [Member]
Disaggregation Of Revenue [Line Items]
Operating revenues									1,251,764	1,016,495	920,937
Analytics [Member]
Disaggregation Of Revenue [Line Items]
Operating revenues									544,299	513,808	496,925
ESG and Climate [Member]
Disaggregation Of Revenue [Line Items]
Operating revenues									166,192	111,364	90,659
All Other - Private Assets [Member]
Disaggregation Of Revenue [Line Items]
Operating revenues									81,289	53,723	49,275
Recurring Subscriptions [Member]
Disaggregation Of Revenue [Line Items]
Operating revenues									1,426,040	1,248,175	1,154,040
Recurring Subscriptions [Member] \| Index [Member]
Disaggregation Of Revenue [Line Items]
Operating revenues									650,629	580,393	530,968
Recurring Subscriptions [Member] \| Analytics [Member]
Disaggregation Of Revenue [Line Items]
Operating revenues									533,178	506,301	486,282
Recurring Subscriptions [Member] \| ESG and Climate [Member]
Disaggregation Of Revenue [Line Items]
Operating revenues									162,609	109,945	89,563
Recurring Subscriptions [Member] \| All Other - Private Assets [Member]
Disaggregation Of Revenue [Line Items]
Operating revenues									79,624	51,536	47,227
Asset-based Fees [Member]
Disaggregation Of Revenue [Line Items]
Operating revenues									553,991	399,771	361,927
Asset-based Fees [Member] \| Index [Member]
Disaggregation Of Revenue [Line Items]
Operating revenues									553,991	399,771	361,927
Non-recurring [Member]
Disaggregation Of Revenue [Line Items]
Operating revenues									63,513	47,444	41,829
Non-recurring [Member] \| Index [Member]
Disaggregation Of Revenue [Line Items]
Operating revenues									47,144	36,331	28,042
Non-recurring [Member] \| Analytics [Member]
Disaggregation Of Revenue [Line Items]
Operating revenues									11,121	7,507	10,643
Non-recurring [Member] \| ESG and Climate [Member]
Disaggregation Of Revenue [Line Items]
Operating revenues									3,583	1,419	1,096
Non-recurring [Member] \| All Other - Private Assets [Member]
Disaggregation Of Revenue [Line Items]
Operating revenues									$ 1,665	$ 2,187	$ 2,048

- Definition

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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+ Details

Revenue Recognition

12 Months Ended

Dec. 31, 2021

Revenue From Contract With Customer [Abstract]

Revenue Recognition

3. REVENUE RECOGNITION

MSCI’s operating revenues are reported by product type, which generally reflects the timing of recognition. The Company’s operating revenues types are recurring subscriptions, asset-based fees and non-recurring revenues. The Company also disaggregates operating revenues by segment.

The tables that follow present the disaggregated operating revenues for the periods indicated:

	For the Year Ended December 31, 2021
	Segments
(in thousands)	Index		Analytics		ESG and Climate		All Other - Private Assets		Total
Operating Revenues Types
Recurring subscriptions	$	650,629	$	533,178	$	162,609	$	79,624	$	1,426,040
Asset-based fees		553,991		—		—		—		553,991
Non-recurring		47,144		11,121		3,583		1,665		63,513
Total	$	1,251,764	$	544,299	$	166,192	$	81,289	$	2,043,544

	For the Year Ended December 31, 2020
	Segments
(in thousands)	Index		Analytics		ESG and Climate		All Other - Private Assets		Total
Operating Revenues Types
Recurring subscriptions	$	580,393	$	506,301	$	109,945	$	51,536	$	1,248,175
Asset-based fees		399,771		—		—		—		399,771
Non-recurring		36,331		7,507		1,419		2,187		47,444
Total	$	1,016,495	$	513,808	$	111,364	$	53,723	$	1,695,390

	For the Year Ended December 31, 2019
	Segments
(in thousands)	Index		Analytics		ESG and Climate		All Other - Private Assets		Total
Operating Revenues Types
Recurring subscriptions	$	530,968	$	486,282	$	89,563	$	47,227	$	1,154,040
Asset-based fees		361,927		—		—		—		361,927
Non-recurring		28,042		10,643		1,096		2,048		41,829
Total	$	920,937	$	496,925	$	90,659	$	49,275	$	1,557,796

The table that follows presents the change in accounts receivable and deferred revenue between the dates indicated:

	Accounts receivable		Deferred revenue
	(in thousands)
Opening (December 31, 2020)	$	558,569	$	675,870
Closing (December 31, 2021)		664,511		824,912
Increase/(decrease)	$	105,942	$	149,042

	Accounts receivable		Deferred revenue
	(in thousands)
Opening (December 31, 2019)	$	499,268	$	574,656
Closing (December 31, 2020)		558,569		675,870
Increase/(decrease)	$	59,301	$	101,214

The amount of revenue recognized in the period that was included in the opening current deferred revenue, which reflects the contract liability amounts, was $672.5 million, $555.8 million and $522.7 million for the years ended December 31, 2021, 2020 and 2019 respectively. The difference between the opening and closing balances of the Company’s deferred revenue was primarily driven by an increase in billings, partially offset by an increase in amortization of deferred revenue to operating revenues. As of December 31, 2021, 2020 and 2019, the Company carried a long-term deferred revenue balance of $23.4 million, $7.1 million and $4.3 million, respectively, in “Other non-current liabilities” on the Consolidated Statement of Financial Condition.

For contracts that have a duration of one year or less, the Company has not disclosed either the remaining performance obligation as of the end of the reporting period or when the Company expects to recognize the revenue. The remaining performance obligations for contracts that have a duration of greater than one year and the periods in which they are expected to be recognized are as follows:

	As of
	December 31,
	2021
	(in thousands)
First 12-month period	$	476,131
Second 12-month period		273,355
Third 12-month period		96,332
Periods thereafter		40,901
Total	$	886,719

- Definition

The entire disclosure of revenue from contract with customer to transfer good or service and to transfer nonfinancial asset. Includes, but is not limited to, disaggregation of revenue, credit loss recognized from contract with customer, judgment and change in judgment related to contract with customer, and asset recognized from cost incurred to obtain or fulfill contract with customer. Excludes insurance and lease contracts.

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+ Details

Acquisitions - Components of Preliminary Purchase Price Allocation (Detail) - USD ($) $ in Thousands	Sep. 13, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Intangible assets:
Goodwill		$ 2,236,386	$ 1,566,022	$ 1,562,868
RCA [Member]
Business Acquisition [Line Items]
Accounts receivable	$ 9,645
Other current assets	3,721
Property, equipment and leasehold improvements, net	1,205
Right of use assets	6,441
Other non-current assets	3,270
Deferred revenue	(35,194)
Other current liabilities	(14,518)
Long-term operating lease liabilities	(4,849)
Deferred tax liabilities	(85,196)
Intangible assets:
Goodwill	670,874
Purchase price, net of cash acquired	948,989
RCA [Member] \| Proprietary Data [Member]
Intangible assets:
Intangible assets	$ 185,500
Estimated useful life	11 years
RCA [Member] \| Customer Relationships [Member]
Intangible assets:
Intangible assets	$ 175,700
Estimated useful life	20 years
RCA [Member] \| Acquired Technology and Software [Member]
Intangible assets:
Intangible assets	$ 31,500
Estimated useful life	9 years
RCA [Member] \| Trademarks [Member]
Intangible assets:
Intangible assets	$ 890
Estimated useful life	2 years

Recent Accounting Standards Updates

12 Months Ended

Dec. 31, 2021

Accounting Changes And Error Corrections [Abstract]

Recent Accounting Standards Updates

2. RECENT ACCOUNTING STANDARDS UPDATES

- Definition

The entire disclosure for change in accounting principle. Includes, but is not limited to, nature, reason, and method of adopting amendment to accounting standards or other change in accounting principle.

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-Name Accounting Standards Codification
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+ Details

Commitments and Contingencies - Schedule of Interest Payments Due Attributable to Senior Notes (Parenthetical) (Detail)	12 Months Ended
	Dec. 31, 2021	Aug. 17, 2021	May 14, 2021	Mar. 26, 2021	May 26, 2020	Mar. 04, 2020
3.625% Senior Unsecured Notes Due 2031 [Member]
Debt Instrument [Line Items]
First payment occurred date	Nov. 01, 2021
Debt instrument interest rate	3.625%		3.625%
3.250% Senior Unsecured Notes Due 2033 [Member]
Debt Instrument [Line Items]
First payment occurred date	Feb. 15, 2022
Debt instrument interest rate	3.25%	3.25%
4.000% Senior Unsecured Notes Due 2029 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	4.00%
3.625% Senior Unsecured Notes Due 2030 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	3.625%			3.625%		3.625%
3.875% Senior Unsecured Notes Due 2031 [Member]
Debt Instrument [Line Items]
Debt instrument interest rate	3.875%				3.875%

Acquisitions - Additional Information (Detail) - USD ($) $ in Thousands		3 Months Ended								12 Months Ended
	Sep. 13, 2021	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Business Acquisition [Line Items]
Operating revenues		$ 549,842	$ 517,099	$ 498,180	$ 478,423	$ 443,661	$ 425,333	$ 409,616	$ 416,780	$ 2,043,544	$ 1,695,390	$ 1,557,796
ASU 2021-08 [Member]
Business Acquisition [Line Items]
Change in Accounting Principle, Accounting Standards Update, Adopted		true								true
Change in accounting principle, accounting standards update, early adoption		true								true
RCA [Member]
Business Acquisition [Line Items]
Date of acquisition	Sep. 13, 2021
Aggregate cash purchase price	$ 949,000
Operating revenues										$ 22,100

- Definition

Indicates (true false) whether accounting standards update was adopted.

+ References

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+ Details

- Definition

Indicates (true false) whether accounting standards update was early adopted.

Segment Information - Operating Revenues by Reportable Segment (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating revenues	$ 549,842	$ 517,099	$ 498,180	$ 478,423	$ 443,661	$ 425,333	$ 409,616	$ 416,780	$ 2,043,544	$ 1,695,390	$ 1,557,796
Index [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating revenues									1,251,764	1,016,495	920,937
Analytics [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating revenues									544,299	513,808	496,925
ESG and Climate [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating revenues									166,192	111,364	90,659
All Other - Private Assets [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating revenues									$ 81,289	$ 53,723	$ 49,275

- Definition

+ References

+ Details

Shareholders' Equity (Deficit) - Summary of Unvested Share-Based Awards Activity (Detail) shares in Thousands	12 Months Ended
	Dec. 31, 2021 $ / shares shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted Average Grant Date Fair Value, balance at the beginning of the period \| $ / shares	$ 164.58
Weighted Average Grant Date Fair Value, Granted \| $ / shares	268.91
Weighted Average Grant Date Fair Value, Vested \| $ / shares	156.41
Weighted Average Grant Date Fair Value, Canceled \| $ / shares	274.66
Weighted Average Grant Date Fair Value, balance at the end of the period \| $ / shares	217.05
Weighted Average Grant Date Fair Value, Expected to vest \| $ / shares	$ 210.15
Unvested Shares [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unvested Share-based Awards at the beginning of period \| shares	727
Number of Shares, Granted \| shares	293
Number of Shares, Vested \| shares	(318)
Number of Shares, Canceled \| shares	(32)
Unvested Share-based Awards at the end of period \| shares	670
Unvested Share-based Awards expected to vest \| shares	612

Commitments and Contingencies - Schedule of Interest Payments Due Attributable to Senior Notes (Detail)	12 Months Ended
	Dec. 31, 2021
4.000% Senior Unsecured Notes Due 2029 [Member]
Debt Instrument [Line Items]
First semi-annual interest payment date	--05-15
Second semi-annual interest payment date	--11-15
3.625% Senior Unsecured Notes Due 2030 [Member]
Debt Instrument [Line Items]
First semi-annual interest payment date	--03-01
Second semi-annual interest payment date	--09-01
3.875% Senior Unsecured Notes Due 2031 [Member]
Debt Instrument [Line Items]
First semi-annual interest payment date	--06-01
Second semi-annual interest payment date	--12-01
3.625% Senior Unsecured Notes Due 2031 [Member]
Debt Instrument [Line Items]
First semi-annual interest payment date	--05-01
Second semi-annual interest payment date	--11-01
3.250% Senior Unsecured Notes Due 2033 [Member]
Debt Instrument [Line Items]
First semi-annual interest payment date	--02-15
Second semi-annual interest payment date	--08-15

Goodwill and Intangible Assets, Net - Schedule of Gross Carrying and Accumulated Amortization Amounts Related to Company's Intangible Assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Acquired Finite Lived Intangible Assets [Line Items]
Gross carrying value excluding foreign exchange translation adjustment	$ 1,276,630	$ 883,535
Foreign exchange translation adjustment	(5,782)	(5,262)
Gross intangible assets	1,270,848	878,273
Accumulated amortization excluding foreign exchange translation adjustment	(678,123)	(643,898)
Foreign exchange translation adjustment	616	373
Accumulated amortization	(677,507)	(643,525)
Net carrying value excluding foreign exchange translation adjustment	598,507	239,637
Foreign exchange translation adjustment	(5,166)	(4,889)
Net carrying value	593,341	234,748
Customer Relationships [Member]
Acquired Finite Lived Intangible Assets [Line Items]
Gross carrying value excluding foreign exchange translation adjustment	532,400	356,700
Accumulated amortization excluding foreign exchange translation adjustment	(277,865)	(253,465)
Net carrying value excluding foreign exchange translation adjustment	$ 254,535	103,235
Customer Relationships [Member] \| Minimum [Member]
Acquired Finite Lived Intangible Assets [Line Items]
Estimated Remaining Useful Lives	13 years
Customer Relationships [Member] \| Maximum [Member]
Acquired Finite Lived Intangible Assets [Line Items]
Estimated Remaining Useful Lives	21 years
Trademarks [Member]
Acquired Finite Lived Intangible Assets [Line Items]
Gross carrying value excluding foreign exchange translation adjustment	$ 208,190	207,300
Accumulated amortization excluding foreign exchange translation adjustment	(152,468)	(143,207)
Net carrying value excluding foreign exchange translation adjustment	$ 55,722	64,093
Trademarks [Member] \| Minimum [Member]
Acquired Finite Lived Intangible Assets [Line Items]
Estimated Remaining Useful Lives	2 years
Trademarks [Member] \| Maximum [Member]
Acquired Finite Lived Intangible Assets [Line Items]
Estimated Remaining Useful Lives	21 years 6 months
Acquired Technology and Software [Member]
Acquired Finite Lived Intangible Assets [Line Items]
Gross carrying value excluding foreign exchange translation adjustment	$ 209,220	177,720
Accumulated amortization excluding foreign exchange translation adjustment	(175,718)	(174,032)
Net carrying value excluding foreign exchange translation adjustment	$ 33,502	3,688
Acquired Technology and Software [Member] \| Minimum [Member]
Acquired Finite Lived Intangible Assets [Line Items]
Estimated Remaining Useful Lives	8 years
Acquired Technology and Software [Member] \| Maximum [Member]
Acquired Finite Lived Intangible Assets [Line Items]
Estimated Remaining Useful Lives	9 years
Capitalized Software [Member]
Acquired Finite Lived Intangible Assets [Line Items]
Gross carrying value excluding foreign exchange translation adjustment	$ 106,181	113,188
Accumulated amortization excluding foreign exchange translation adjustment	(49,394)	(57,464)
Net carrying value excluding foreign exchange translation adjustment	$ 56,787	55,724
Capitalized Software [Member] \| Minimum [Member]
Acquired Finite Lived Intangible Assets [Line Items]
Estimated Remaining Useful Lives	3 years
Capitalized Software [Member] \| Maximum [Member]
Acquired Finite Lived Intangible Assets [Line Items]
Estimated Remaining Useful Lives	5 years
Proprietary Data [Member]
Acquired Finite Lived Intangible Assets [Line Items]
Gross carrying value excluding foreign exchange translation adjustment	$ 220,639	28,627
Accumulated amortization excluding foreign exchange translation adjustment	(22,678)	(15,730)
Net carrying value excluding foreign exchange translation adjustment	$ 197,961	$ 12,897
Proprietary Data [Member] \| Minimum [Member]
Acquired Finite Lived Intangible Assets [Line Items]
Estimated Remaining Useful Lives	11 years
Proprietary Data [Member] \| Maximum [Member]
Acquired Finite Lived Intangible Assets [Line Items]
Estimated Remaining Useful Lives	13 years

Goodwill and Intangible Assets, Net (Tables)

12 Months Ended

Dec. 31, 2021

Goodwill And Intangible Assets Disclosure [Abstract]

Schedule of Change to Company's Goodwill

The following table presents goodwill by reportable segment:

(in thousands)	Index			Analytics		ESG and Climate		All Other - Private Assets				Total
Goodwill at December 31, 2019	$	1,204,694		$	290,976	$	46,612	$	20,586			$	1,562,868
Foreign exchange translation adjustment		1,064			—		1,435		655				3,154
Goodwill at December 31, 2020	$	1,205,758		$	290,976	$	48,047	$	21,241			$	1,566,022
Acquisitions		—			—		—		670,874		⁽¹⁾		670,874
Foreign exchange translation adjustment		(315	)		—		—		(195	)			(510	)
Goodwill at December 31, 2021	$	1,205,443		$	290,976	$	48,047	$	691,920			$	2,236,386

⁽¹⁾	^{Reflects the impact of the acquisition of RCA.}

Schedule of Amortization Expense Related to Intangible Assets by Category

The following table presents the amount of amortization expense related to intangible assets by category for the periods indicated:

	Years Ended
	December 31,		December 31,		December 31,
(in thousands)	2021		2020		2019
Amortization expense of acquired intangible assets	$	42,242	$	34,049	$	34,773
Amortization expense of internally developed capitalized software		22,337		22,892		14,637
Write-off of internally developed capitalized software		16,013		—		—
Total amortization of intangible assets expense	$	80,592	$	56,941	$	49,410

Schedule of Gross Carrying and Accumulated Amortization Amounts Related to Company's Intangible Assets

The gross carrying and accumulated amortization amounts related to the Company’s intangible assets were as follows:

		As of
	Estimated	December 31,			December 31,
	Useful Lives	2021			2020
		(in thousands)
Gross intangible assets:
Customer relationships	13 to 21 years	$	532,400		$	356,700
Proprietary data	11 to 13 years		220,639			28,627
Acquired technology and software	8 to 9 years		209,220			177,720
Trademarks	2 to 21.5 years		208,190			207,300
Internally developed capitalized software	3 to 5 years		106,181			113,188
Subtotal			1,276,630			883,535
Foreign exchange translation adjustment			(5,782	)		(5,262	)
Total gross intangible assets		$	1,270,848		$	878,273
Accumulated amortization:
Customer relationships		$	(277,865	)	$	(253,465	)
Proprietary data			(22,678	)		(15,730	)
Acquired technology and software			(175,718	)		(174,032	)
Trademarks			(152,468	)		(143,207	)
Internally developed capitalized software			(49,394	)		(57,464	)
Subtotal			(678,123	)		(643,898	)
Foreign exchange translation adjustment			616			373
Total accumulated amortization		$	(677,507	)	$	(643,525	)
Net intangible assets:
Customer relationships		$	254,535		$	103,235
Proprietary data			197,961			12,897
Acquired technology and software			33,502			3,688
Trademarks			55,722			64,093
Internally developed capitalized software			56,787			55,724
Subtotal			598,507			239,637
Foreign exchange translation adjustment			(5,166	)		(4,889	)
Total net intangible assets		$	593,341		$	234,748

Estimated Amortization Expense for Succeeding Years

Estimated amortization expense for succeeding years is presented below:

Years Ending December 31,	Amortization Expense
	(in thousands)
2022	$	87,438
2023		81,532
2024		74,370
2025		51,800
2026		36,175
Thereafter		262,026
Total	$	593,341

Goodwill and Intangible Assets, Net - Estimated Amortization Expense for Succeeding Years (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Goodwill And Intangible Assets Disclosure [Abstract]
2022	$ 87,438
2023	81,532
2024	74,370
2025	51,800
2026	36,175
Thereafter	262,026
Net carrying value	$ 593,341	$ 234,748

Commitments and Contingencies - Schedule of Senior Unsecured Notes (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2021	Aug. 17, 2021	May 14, 2021	Mar. 26, 2021	Dec. 31, 2020	May 26, 2020	Mar. 04, 2020
Debt Instrument [Line Items]
Principal amount outstanding	$ 4,200,000,000
Carrying value	4,161,422,000				$ 3,366,777,000
Fair Value	$ 4,355,789,000				3,616,323,000
4.750% Senior Unsecured Notes Due 2026 [Member]
Debt Instrument [Line Items]
Maturity Date	Aug. 01, 2026
Carrying value					496,257,000
Fair Value					522,325,000
5.375% Senior Unsecured Notes Due 2027 [Member]
Debt Instrument [Line Items]
Maturity Date	May 15, 2027
Principal amount outstanding		$ 500,000,000.0
Carrying value					495,819,000
Fair Value					538,100,000
4.000% Senior Unsecured Notes Due 2029 [Member]
Debt Instrument [Line Items]
Maturity Date	Nov. 15, 2029
Principal amount outstanding	$ 1,000,000,000
Carrying value	991,455,000				990,364,000
Fair Value	$ 1,047,950,000				1,073,040,000
3.625% Senior Unsecured Notes Due 2030 [Member]
Debt Instrument [Line Items]
Maturity Date	Sep. 01, 2030
Principal amount outstanding	$ 900,000,000			$ 500,000,000.0			$ 400,000,000.0
Carrying value	894,263,000				395,458,000
Fair Value	$ 924,777,000				419,428,000
3.875% Senior Unsecured Notes Due 2031 [Member]
Debt Instrument [Line Items]
Maturity Date	Feb. 15, 2031
Principal amount outstanding	$ 1,000,000,000					$ 1,000,000,000.0
Carrying value	989,973,000				988,879,000
Fair Value	$ 1,046,620,000				$ 1,063,430,000
3.625% Senior Unsecured Notes Due 2031 [Member]
Debt Instrument [Line Items]
Maturity Date	Nov. 01, 2031
Principal amount outstanding	$ 600,000,000		$ 600,000,000.0
Carrying value	593,538,000
Fair Value	$ 625,536,000
3.250% Senior Unsecured Notes Due 2033 [Member]
Debt Instrument [Line Items]
Maturity Date	Aug. 15, 2033
Principal amount outstanding	$ 700,000,000	$ 700,000,000.0
Carrying value	692,193,000
Fair Value	$ 710,906,000

Shareholders' Equity (Deficit) - Additional Information 1 (Detail) - USD ($)	Dec. 31, 2021	Oct. 29, 2020
2020 Repurchase Program [Member]
Equity, Class of Treasury Stock [Line Items]
Repurchase program authorizing the purchase of shares		$ 1,000,000,000.0
Stock repurchase program, remaining authorized repurchase amount	$ 1,589,200,000	1,804,500,000
2019 Repurchase Program [Member]
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program, remaining authorized repurchase amount		$ 804,500,000

Shareholders' Equity (Deficit) - Additional Information 2 (Detail) - USD ($) $ in Millions		12 Months Ended
	Feb. 12, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Windfall tax benefits for share-based compensation expense related to share-based awards and stock options		$ 22.3	$ 20.9	$ 82.5
Compensation cost related to unvested share-based awards not yet recognized		$ 52.3
Number of shares available for future grants		3,800,000
Assumed dividend yield applied in valuation		0.00%
Total fair value of Share-Based Awards converted or vested to common stock		$ 152.6	$ 133.6	401.7
Remaining stock options outstanding exercisable		0	0
Intrinsic value of the stock options exercised				$ 22.1
Minimum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Compensation cost related to unvested share-based awards not yet recognized, period for recognition		1 year
Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Compensation cost related to unvested share-based awards not yet recognized, period for recognition		5 years
Subsequent Event [Member] \| PSUs [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Post-vesting restriction period	1 year
Subsequent Event [Member] \| PSUs [Member] \| Minimum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period of awards	3 years
Subsequent Event [Member] \| Bonus Award [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares grants in period	227,684
Aggregate fair value	$ 79.6
Subsequent Event [Member] \| Bonus Award [Member] \| RSUs [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period of awards	3 years
Subsequent Event [Member] \| Bonus Award [Member] \| PSUs [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period of awards	3 years
Minimum performance period	3 years

Consolidated Statements of Financial Condition (Parenthetical) - $ / shares	Dec. 31, 2021	Dec. 31, 2020
Statement Of Financial Position [Abstract]
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	100,000,000	100,000,000
Preferred stock, shares issued	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	750,000,000	750,000,000
Common stock, shares issued	133,162,178	132,829,175
Common stock, shares outstanding	82,439,449	82,573,407
Treasury shares	50,722,729	50,255,768

Goodwill and Intangible Assets, Net - Schedule of Change to Company's Goodwill (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Goodwill [Line Items]
Goodwill, Beginning balance	$ 1,566,022	$ 1,562,868
Acquisitions	670,874
Foreign exchange translation adjustment	(510)	3,154
Goodwill, Ending balance	2,236,386	1,566,022
Index [Member]
Goodwill [Line Items]
Goodwill, Beginning balance	1,205,758	1,204,694
Foreign exchange translation adjustment	(315)	1,064
Goodwill, Ending balance	1,205,443	1,205,758
Analytics [Member]
Goodwill [Line Items]
Goodwill, Beginning balance	290,976	290,976
Goodwill, Ending balance	290,976	290,976
ESG and Climate [Member]
Goodwill [Line Items]
Goodwill, Beginning balance	48,047	46,612
Foreign exchange translation adjustment		1,435
Goodwill, Ending balance	48,047	48,047
All Other - Private Assets [Member]
Goodwill [Line Items]
Goodwill, Beginning balance	21,241	20,586
Acquisitions	670,874
Foreign exchange translation adjustment	(195)	655
Goodwill, Ending balance	$ 691,920	$ 21,241

Introduction and Basis of Presentation - Additional Information (Detail)		12 Months Ended
	Jul. 01, 2021 USD ($)	Dec. 31, 2021 USD ($) Customer	Dec. 31, 2020 USD ($) Customer	Dec. 31, 2019 USD ($) Customer
Introduction And Basis Of Presentation [Line Items]
Equity method investment \| $		$ 218,763,000	$ 190,898,000
Impairment of goodwill \| $	$ 0	$ 0	$ 0	$ 0
Sales Revenue, Services, Net \| Customer Concentration Risk
Introduction And Basis Of Presentation [Line Items]
Number of major customers accounted for 10.0% or more of revenues		1	1	1
Sales Revenue, Services, Net \| Customer Concentration Risk \| Blackrock Inc [Member]
Introduction And Basis Of Presentation [Line Items]
Percentage of operating revenues accounted for by major customer		12.70%	11.00%	11.50%
Sales Revenue, Services, Net \| Index [Member] \| Customer Concentration Risk \| Blackrock Inc [Member]
Introduction And Basis Of Presentation [Line Items]
Percentage of operating revenues accounted for by major customer		20.40%	18.00%	18.90%
Sales Revenue, Services, Net \| Analytics [Member] \| Customer Concentration Risk
Introduction And Basis Of Presentation [Line Items]
Number of major customers accounted for 10.0% or more of revenues		0	0	0
Sales Revenue, Services, Net \| ESG and Climate [Member] \| Customer Concentration Risk
Introduction And Basis Of Presentation [Line Items]
Number of major customers accounted for 10.0% or more of revenues		0	0	0
Sales Revenue, Services, Net \| All Other [Member] \| Customer Concentration Risk
Introduction And Basis Of Presentation [Line Items]
Number of major customers accounted for 10.0% or more of revenues		0	0	0
Minimum [Member] \| Software and Software Development Costs [Member]
Introduction And Basis Of Presentation [Line Items]
Estimates of useful lives		3 years
Maximum [Member] \| Software and Software Development Costs [Member]
Introduction And Basis Of Presentation [Line Items]
Estimates of useful lives		5 years
The Burgiss Group, LLC [Member]
Introduction And Basis Of Presentation [Line Items]
Equity method investment \| $		$ 218,800,000
Equity method investment, ownership percentage		33.60%

Shareholders' Equity (Deficit) - Summary of Vested and Unvested Share-Based Awards Activity (Parenthetical) (Detail) shares in Thousands	Dec. 31, 2021 $ / shares shares
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Share-based Awards, vested or expected to vest \| shares	639
Share-based Awards , vested or expected to vest, weighted average price \| $ / shares	$ 213.70

Quarterly Results of Operations

12 Months Ended

Dec. 31, 2021

Quarterly Financial Information Disclosure [Abstract]

Quarterly Results of Operations

14. QUARTERLY RESULTS OF OPERATIONS (unaudited):

	2021												2020
	First			Second			Third			Fourth			First			Second			Third			Fourth
	Quarter			Quarter			Quarter			Quarter			Quarter			Quarter			Quarter			Quarter
	(in thousands, except per share data)
Operating revenues	$	478,423		$	498,180		$	517,099		$	549,842		$	416,780		$	409,616		$	425,333		$	443,661
Cost of revenues		85,780			87,327			89,674			95,903			74,609			70,456			70,704			75,935
Selling and marketing		56,467			58,191			59,819			68,708			55,549			51,617			52,668			56,662
Research and development		24,862			27,531			28,352			30,819			26,562			22,534			24,901			27,056
General and administrative		34,728			30,182			38,110			44,873			30,833			28,309			27,613			27,872
Amortization of intangible assets		15,068			30,396			14,105			21,023			13,776			14,062			14,333			14,770
Depreciation and amortization of property, equipment and leasehold improvements		7,143			7,020			6,809			7,929			7,567			7,463			7,494			7,281
Total operating expenses		224,048			240,647			236,869			269,255			208,896			194,441			197,713			209,576
Operating income		254,375			257,533			280,230			280,587			207,884			215,175			227,620			234,085
Interest income		(386	)		(347	)		(396	)		(368	)		(3,483	)		(771	)		(475	)		(301	)
Interest expense		37,584			39,557			42,137			40,336			40,231			41,227			37,536			37,330
Other expense (income)		1,149			22,628			37,839			(5,144	)		8,287			35,552			1,516			1,890
Other expense (income), net		38,347			61,838			79,580			34,824			45,035			76,008			38,577			38,919
Income before provision for income taxes		216,028			195,695			200,650			245,763			162,849			139,167			189,043			195,166
Provision for income taxes		19,209			30,272			30,774			51,898			14,724			24,044			6,685			38,950
Net income	$	196,819		$	165,423		$	169,876		$	193,865		$	148,125		$	115,123		$	182,358		$	156,216

Earnings per basic common share	$	2.38		$	2.01		$	2.06		$	2.35		$	1.75		$	1.38		$	2.18		$	1.89

Earnings per diluted common share	$	2.36		$	1.99		$	2.03		$	2.32		$	1.73		$	1.36		$	2.16		$	1.87

Weighted average shares outstanding used in computing per share data
Basic		82,640			82,454			82,470			82,473			84,870			83,666			83,602			82,737
Diluted		83,493			83,295			83,554			83,578			85,548			84,349			84,479			83,707

Property, Equipment and Leasehold Improvements, Net (Tables)

12 Months Ended

Dec. 31, 2021

Property Plant And Equipment [Abstract]

Schedule of Property, Equipment and Leasehold Improvements, Net

Property, equipment and leasehold improvements, net at December 31, 2021 and 2020 consisted of the following:

		As of
	Estimated	December 31,			December 31,
	Useful Lives	2021			2020
		(in thousands)
Computer & related equipment	2 to 5 years	$	179,557		$	186,786
Furniture & fixtures	7 years		14,194			15,276
Leasehold improvements	1 to 21 years		56,308			56,537
Work-in-process	—		2,699			2,996
Subtotal			252,758			261,595
Accumulated depreciation and amortization			(186,043	)		(181,149	)
Property, equipment and leasehold improvements, net		$	66,715		$	80,446

Quarterly Results of Operations (Tables)

12 Months Ended

Dec. 31, 2021

Quarterly Financial Information Disclosure [Abstract]

Summary of Quarterly Results of Operations

	2021												2020
	First			Second			Third			Fourth			First			Second			Third			Fourth
	Quarter			Quarter			Quarter			Quarter			Quarter			Quarter			Quarter			Quarter
	(in thousands, except per share data)
Operating revenues	$	478,423		$	498,180		$	517,099		$	549,842		$	416,780		$	409,616		$	425,333		$	443,661
Cost of revenues		85,780			87,327			89,674			95,903			74,609			70,456			70,704			75,935
Selling and marketing		56,467			58,191			59,819			68,708			55,549			51,617			52,668			56,662
Research and development		24,862			27,531			28,352			30,819			26,562			22,534			24,901			27,056
General and administrative		34,728			30,182			38,110			44,873			30,833			28,309			27,613			27,872
Amortization of intangible assets		15,068			30,396			14,105			21,023			13,776			14,062			14,333			14,770
Depreciation and amortization of property, equipment and leasehold improvements		7,143			7,020			6,809			7,929			7,567			7,463			7,494			7,281
Total operating expenses		224,048			240,647			236,869			269,255			208,896			194,441			197,713			209,576
Operating income		254,375			257,533			280,230			280,587			207,884			215,175			227,620			234,085
Interest income		(386	)		(347	)		(396	)		(368	)		(3,483	)		(771	)		(475	)		(301	)
Interest expense		37,584			39,557			42,137			40,336			40,231			41,227			37,536			37,330
Other expense (income)		1,149			22,628			37,839			(5,144	)		8,287			35,552			1,516			1,890
Other expense (income), net		38,347			61,838			79,580			34,824			45,035			76,008			38,577			38,919
Income before provision for income taxes		216,028			195,695			200,650			245,763			162,849			139,167			189,043			195,166
Provision for income taxes		19,209			30,272			30,774			51,898			14,724			24,044			6,685			38,950
Net income	$	196,819		$	165,423		$	169,876		$	193,865		$	148,125		$	115,123		$	182,358		$	156,216

Earnings per basic common share	$	2.38		$	2.01		$	2.06		$	2.35		$	1.75		$	1.38		$	2.18		$	1.89

Earnings per diluted common share	$	2.36		$	1.99		$	2.03		$	2.32		$	1.73		$	1.36		$	2.16		$	1.87

Weighted average shares outstanding used in computing per share data
Basic		82,640			82,454			82,470			82,473			84,870			83,666			83,602			82,737
Diluted		83,493			83,295			83,554			83,578			85,548			84,349			84,479			83,707

Commitments and Contingencies - Additional Information (Detail) - USD ($)			12 Months Ended
	May 14, 2021	Mar. 29, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Nov. 30, 2024	Aug. 17, 2021	Mar. 26, 2021	May 26, 2020	Mar. 04, 2020
Schedule Of Commitments And Contingencies [Line Items]
Debt instrument principal amount			$ 4,200,000,000
Loss on extinguishment of debt			59,103,000	$ 44,930,000	$ 16,794,000
Deferred financing fees and premium remain unamortized			40,600,000
Long-term Debt [Member]
Schedule Of Commitments And Contingencies [Line Items]
Deferred financing fees and premium remain unamortized			38,600,000
Other Non-Current Assets [Member]
Schedule Of Commitments And Contingencies [Line Items]
Deferred financing fees and premium remain unamortized			1,500,000
Prepaid and Other Assets [Member]
Schedule Of Commitments And Contingencies [Line Items]
Deferred financing fees and premium remain unamortized			500,000
Revolving Credit Agreement [Member]
Schedule Of Commitments And Contingencies [Line Items]
Revolving credit facility, increase in aggregate commitments		$ 100,000,000.0
Revolving credit facility, maximum borrowing		$ 500,000,000.0
Revolving Credit Agreement [Member] \| Scenario Forecast [Member]
Schedule Of Commitments And Contingencies [Line Items]
Revolving credit facility, maximum borrowing						$ 467,500,000
4.000% Senior Unsecured Notes Due 2029 [Member]
Schedule Of Commitments And Contingencies [Line Items]
Debt instrument principal amount			$ 1,000,000,000
Debt instrument interest rate			4.00%
Maturity date			Nov. 15, 2029
Redemption description			At any time prior to November 15, 2024, the Company may redeem all or part of the 2029 Senior Notes at a redemption price equal to the sum of (i) 100% of the principal amount thereof, plus (ii) a make-whole premium as of the date of redemption, plus (iii) accrued and unpaid interest and additional interest, if any, thereon, to the date of redemption.
Percentage of aggregate principal amount redeemed			35.00%
Redemption price			104.00%
4.000% Senior Unsecured Notes Due 2029 [Member] \| Minimum [Member]
Schedule Of Commitments And Contingencies [Line Items]
Percentage of principal amount outstanding after redemption			50.00%
3.875% Senior Unsecured Notes Due 2031 [Member]
Schedule Of Commitments And Contingencies [Line Items]
Debt instrument principal amount			$ 1,000,000,000						$ 1,000,000,000.0
Debt instrument interest rate			3.875%						3.875%
Maturity date			Feb. 15, 2031
Redemption description			At any time prior to June 1, 2025, the Company may redeem all or part of the 2031A Senior Notes at a redemption price equal to the sum of (i) 100% of the principal amount thereof, plus (ii) a make-whole premium as of the date of redemption, plus (iii) accrued and unpaid interest, if any, to, but excluding, the redemption date.
Percentage of aggregate principal amount redeemed			50.00%
Redemption price			103.875%
3.875% Senior Unsecured Notes Due 2031 [Member] \| Maximum [Member]
Schedule Of Commitments And Contingencies [Line Items]
Percentage of aggregate principal amount redeemed			35.00%
3.625% Senior Unsecured Notes Due 2030 [Member]
Schedule Of Commitments And Contingencies [Line Items]
Debt instrument principal amount			$ 900,000,000					$ 500,000,000.0		$ 400,000,000.0
Debt instrument interest rate			3.625%					3.625%		3.625%
Maturity date			Sep. 01, 2030
Redemption description			At any time prior to March 1, 2025, the Company may redeem all or part of the 2030 Senior Notes at a redemption price equal to the sum of (i) 100% of the principal amount thereof, plus (ii) a make-whole premium as of the date of redemption, plus (iii) accrued and unpaid interest and additional interest, if any, thereon, to the date of redemption.
Redemption price			103.625%
3.625% Senior Unsecured Notes Due 2030 [Member] \| Minimum [Member]
Schedule Of Commitments And Contingencies [Line Items]
Percentage of principal amount outstanding after redemption			50.00%
3.625% Senior Unsecured Notes Due 2030 [Member] \| Maximum [Member]
Schedule Of Commitments And Contingencies [Line Items]
Percentage of aggregate principal amount redeemed			35.00%
4.75% Senior Unsecured Notes Due 2026 [Member]
Schedule Of Commitments And Contingencies [Line Items]
Debt instrument principal amount								$ 500,000,000.0
Debt instrument interest rate			4.75%					4.75%
Redemption date			Apr. 12, 2021
4.75% Senior Unsecured Notes Due 2026 [Member] \| Other expense (income) [Member]
Schedule Of Commitments And Contingencies [Line Items]
Loss on extinguishment of debt			$ 21,800,000
Write-off of unamortized debt issuance costs			3,600,000
4.75% Senior Unsecured Notes Due 2026 [Member] \| Other expense (income) [Member] \| Indenture [Member]
Schedule Of Commitments And Contingencies [Line Items]
Loss on debt extinguishment includes applicable premium and redemption price			18,200,000
3.625% Senior Unsecured Notes Due 2031 [Member]
Schedule Of Commitments And Contingencies [Line Items]
Debt instrument principal amount	$ 600,000,000.0		$ 600,000,000
Debt instrument interest rate	3.625%		3.625%
Maturity date			Nov. 01, 2031
Redemption description			At any time prior to November 1, 2026, the Company may redeem all or part of the 2031B Senior Notes at a redemption price equal to the sum of (i) 100% of the principal amount thereof, plus (ii) a make-whole premium as of the date of redemption, plus (iii) accrued and unpaid interest, if any, thereon, to the date of redemption.
Redemption price			103.625%
Redemption date	Nov. 01, 2026
3.625% Senior Unsecured Notes Due 2031 [Member] \| Minimum [Member]
Schedule Of Commitments And Contingencies [Line Items]
Percentage of principal amount outstanding after redemption			50.00%
3.625% Senior Unsecured Notes Due 2031 [Member] \| Maximum [Member]
Schedule Of Commitments And Contingencies [Line Items]
Percentage of aggregate principal amount redeemed			35.00%
3.250% Senior Unsecured Notes Due 2033 [Member]
Schedule Of Commitments And Contingencies [Line Items]
Debt instrument principal amount			$ 700,000,000				$ 700,000,000.0
Debt instrument interest rate			3.25%				3.25%
Maturity date			Aug. 15, 2033
Redemption description			At any time prior to August 15, 2027, the Company may redeem all or part of the 2033 Senior Notes at a redemption price equal to the sum of (i) 100% of the principal amount thereof, plus (ii) a make-whole premium as of the date of redemption, plus (iii) accrued and unpaid interest and additional interest, if any, thereon, to the date of redemption.
Redemption price			103.25%
3.250% Senior Unsecured Notes Due 2033 [Member] \| Minimum [Member]
Schedule Of Commitments And Contingencies [Line Items]
Percentage of principal amount outstanding after redemption			50.00%
3.250% Senior Unsecured Notes Due 2033 [Member] \| Maximum [Member]
Schedule Of Commitments And Contingencies [Line Items]
Percentage of aggregate principal amount redeemed			35.00%
5.375% Senior Unsecured Notes Due 2027 [Member]
Schedule Of Commitments And Contingencies [Line Items]
Debt instrument principal amount							$ 500,000,000.0
Debt instrument interest rate			5.375%				5.375%
Maturity date			May 15, 2027
Redemption date			Sep. 02, 2021
5.375% Senior Unsecured Notes Due 2027 [Member] \| Other expense (income) [Member]
Schedule Of Commitments And Contingencies [Line Items]
Loss on extinguishment of debt			$ 37,300,000
Write-off of unamortized debt issuance costs			3,700,000
5.375% Senior Unsecured Notes Due 2027 [Member] \| Other expense (income) [Member] \| Indenture [Member]
Schedule Of Commitments And Contingencies [Line Items]
Loss on debt extinguishment includes applicable premium and redemption price			33,600,000
Senior Unsecured Notes [Member]
Schedule Of Commitments And Contingencies [Line Items]
Debt instrument principal amount			$ 4,200,000,000.0

Shareholders' Equity (Deficit)

12 Months Ended

Dec. 31, 2021

Equity [Abstract]

Shareholders' Equity (Deficit)

11. SHAREHOLDERS’ EQUITY (DEFICIT)

This note reflects the share repurchases and related activity as well as share-based compensation activity recognized by the Company, for all periods referenced.

Return of capital

On October 29, 2020, the Board of Directors authorized a stock repurchase program for the purchase of up to $1,000.0 million worth of shares of MSCI’s common stock in addition to the $804.5 million of authorization then remaining under a previously existing share repurchase program (the “2020 Repurchase Program”) for a total of $1,804.5 million of stock repurchase authorization.

Share repurchases made pursuant to the 2020 Repurchase Program may take place in the open market or in privately negotiated transactions from time to time based on market and other conditions. This authorization may be modified, suspended or terminated by the Board of Directors at any time without prior notice. As of December 31, 2021, there was $1,589.2 million of available authorization remaining under the 2020 Repurchase Program.

The following table provides information with respect to repurchases of the Company’s common stock made on the open market:

Year Ended	Average Price Paid Per Share		Total Number of Shares Repurchased		Dollar Value of Shares Repurchased
	(in thousands, except per share data)
December 31, 2021	$	412.25		339	$	139,580
December 31, 2020	$	291.76		2,493	$	727,344
December 31, 2019	$	147.97		690	$	102,081

The following table presents dividends declared per common share as well as total amounts declared, distributed and deferred for the periods indicated

	Dividends
	Per Share		Declared		Distributed		(Released)/ Deferred
2021	(in thousands, except per share data)
Three Months Ended March 31,	$	0.78	$	65,947	$	66,153	$	(206	)
Three Months Ended June 30,		0.78		64,863		64,489		374
Three Months Ended September 30,		1.04		86,476		85,961		515
Three Months Ended December 31,		1.04		86,475		85,973		502
Year Ended December 31,	$	3.64	$	303,761	$	302,576	$	1,185
2020
Three Months Ended March 31,	$	0.68	$	59,233	$	59,455	$	(222	)
Three Months Ended June 30,		0.68		57,360		57,068		292
Three Months Ended September 30,		0.78		65,830		65,454		376
Three Months Ended December 31,		0.78		65,029		64,653		376
Year Ended December 31,	$	2.92	$	247,452	$	246,630	$	822
2019
Three Months Ended March 31,	$	0.58	$	55,339	$	57,988	$	(2,649	)
Three Months Ended June 30,	0.58			49,613		49,365		248
Three Months Ended September 30,	0.68			58,176		57,882		294
Three Months Ended December 31,	0.68			58,176		57,916		260
Year Ended December 31,	$	2.52	$	221,304	$	223,151	$	(1,847	)

Common Stock

The following table presents activity related to shares of common stock issued and repurchased for the periods indicated:

	Common		Treasury			Common Stock
	Stock Issued		Stock			Outstanding
Balance At December 31, 2018		130,029,926		(45,855,788	)		84,174,138
Dividend payable/paid		1,064		(585	)		479
Common stock issued and exercise of stock options		2,387,145		—			2,387,145
Shares withheld for tax withholding		—		(1,077,815	)		(1,077,815	)
Shares repurchased under stock repurchase programs		—		(689,891	)		(689,891	)
Shares issued to Directors		1,277		(403	)		874
Balance At December 31, 2019		132,419,412		(47,624,482	)		84,794,930
Dividend payable/paid		553		(337	)		216
Common stock issued		406,960		—			406,960
Shares withheld for tax withholding		—		(165,239	)		(165,239	)
Shares repurchased under stock repurchase programs		—		(2,492,994	)		(2,492,994	)
Shares issued to Directors		2,250		27,284			29,534
Balance At December 31, 2020		132,829,175		(50,255,768	)		82,573,407
Dividend payable/paid		268		(156	)		112
Common stock issued		331,427		—			331,427
Shares withheld for tax withholding		—		(133,431	)		(133,431	)
Shares repurchased under stock repurchase programs		—		(338,577	)		(338,577	)
Shares issued to Directors		1,308		5,203			6,511
Balance At December 31, 2021		133,162,178		(50,722,729	)		82,439,449

Share-Based Compensation

The Company regularly issues share-based compensation to its employees and directors who are not employees of the Company. The accounting guidance for share-based compensation requires measurement of

compensation cost for share-based awards at fair value and recognition of compensation cost over the service period, net of estimated forfeitures.

In February 2022, the Company granted a portion of its employees awards in the form of RSUs, PSUs and performance stock options (“PSOs”). The total number of units and options granted was 227,684. The aggregate fair value of the awards was $79.6 million. The RSUs granted in 2022 vest at the end of a three-year service period. The PSUs granted in 2022 vest at the end of a three-year service period, are subject to a one-year sale restriction and are also subject to the achievement of an absolute total shareholder return compounded annual growth rate, measured over a three-year period. The PSOs granted in 2022 vest and become exercisable at the end of a three-year service period and are subject to a performance condition based on the combined level of achievement of a cumulative revenue performance goal and a cumulative adjusted EPS performance goal, measured over a three-year period. All of these awards are subject to forfeiture under specific criteria set in the award agreements.

In connection with awards under its equity-based compensation and benefit plans, the Company is authorized to use newly-issued shares or certain shares of common stock held in treasury.

The following table presents the amount of share-based compensation expense by category for the periods indicated:

	Years Ended
	December 31,		December 31,		December 31,
(in thousands)	2021		2020		2019
Cost of revenues	$	17,285	$	14,523	$	11,190
Selling and marketing		14,411		13,545		14,943
Research and development		7,913		7,344		5,966
General and administrative		17,463		19,826		11,991
Other expense (income)		1,416		379		—
Total share-based compensation expense	$	58,488	$	55,617	$	44,090

The windfall tax benefits for share-based compensation expense related to RSUs, PSUs and other restricted stock unit awards (together, the “Share-based Awards”) as well as stock options granted to Company employees and to directors who are not employees of the Company were $22.3 million, $20.9 million and $82.5 million for the years ended December 31, 2021, 2020 and 2019, respectively.

As of December 31, 2021, $52.3 million of compensation cost related to MSCI unvested share-based awards granted to the Company’s employees and to directors who are not employees of the Company had not yet been recognized. The unrecognized compensation cost relating to unvested stock-based awards expected to vest will be recognized primarily over the next one to five years.

In connection with awards under its equity-based compensation and benefit plans, the Company is authorized to issue shares of common stock. As of December 31, 2021, 3.8 million shares of common stock were available for future grants under these plans.

Certain Company employees have been granted Share-based Awards pursuant to a share-based compensation plan. The plan provides for the deferral of a portion of certain employees’ discretionary compensation with awards made in the form of Share-based Awards. Recipients of Share-based Awards generally have rights to receive dividend equivalents that are subject to vesting. The Company reports the target number of PSUs granted unless it has determined, based on the actual achievement of performance measures, that an employee will receive a different amount of shares underlying the PSUs, in which case the Company reports the amount of shares employees are likely to receive.

The fair value of the PSUs on the award dates were estimated under the Monte Carlo method using the following assumptions:

	Years Ended
	December 31,			December 31,			December 31,
	2021			2020			2019
Risk free interest rate		0.33	%		1.28	%		2.46	%
Historical stock price volatility		34.13	%		25.42	%		21.98	%
Term (in years)		4.0			3.8			3.7
Discount of Lack of Marketability		4.0	%		0.0	%		0.0	%

The risk-free interest rate was determined based on the yields available on U.S. Constant Maturity Treasury yield curve as of the valuation dates with a maturity commensurate with the terms. The expected stock price volatility was determined using historical volatility. Since the PSU awards are dividend-protected, the assumed dividend yield applied in the valuation was 0.0%.

The following table presents activity concerning the Company’s vested and unvested Share-based Awards applicable to its employees (share data in thousands) for the period indicated:

				Weighted
				Average
				Grant
	Number of			Date Fair
For the Year Ended December 31, 2021	Shares			Value
Vested and unvested Share-based Awards at December 31, 2020		739		$	163.99
Granted		330		$	265.99
Conversion to common stock		(340	)	$	153.66
Canceled		(32	)	$	274.66
Vested and unvested Share-based Awards at December 31, 2021 ⁽¹⁾		697		$	217.05

⁽¹⁾	As of December 31, 2021, 639 Share-based Awards, with a weighted average grant date fair value of $213.70, were vested or expected to vest.

The total fair value of Share-based Awards held by the Company’s employees that converted to MSCI common stock during the years ended December 31, 2021, 2020 and 2019 was $152.6 million, $133.6 million and $401.7 million, respectively.

The following table presents activity concerning the Company’s unvested Share-based Awards related to its employees (share data in thousands):

				Weighted
				Average
				Grant
	Number of			Date Fair
For the Year Ended December 31, 2021	Shares			Value
Unvested Share-based Awards at December 31, 2020		727		$	164.58
Granted		293		$	268.91
Vested		(318	)	$	156.41
Canceled		(32	)	$	274.66
Unvested Share-based Awards at December 31, 2021		670		$	217.05

Unvested Share-based Awards expected to vest		612		$	210.15

There were no remaining stock options outstanding that could be exercised during any of the years ended December 31, 2021 and 2020. The intrinsic value of the stock options exercised by the Company’s employees during the year ended December 31, 2019 was $22.1 million.

- Definition

The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income.

+ References

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+ Details

Shareholders' Equity (Deficit) - Summary of Activity Related to Shares of Common Stock Issued and Repurchased (Detail) - shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Common Stock Outstanding [Line Items]
Beginning balance	132,829,175
Beginning balance	50,255,768
Ending balance	133,162,178	132,829,175
Ending balance	50,722,729	50,255,768
Common Stock Issued [Member]
Common Stock Outstanding [Line Items]
Beginning balance	132,829,175	132,419,412	130,029,926
Dividend payable/paid	268	553	1,064
Common stock issued	331,427	406,960
Common stock issued and exercise of stock options			2,387,145
Shares issued to Directors	1,308	2,250	1,277
Ending balance	133,162,178	132,829,175	132,419,412
Treasury Stock [Member]
Common Stock Outstanding [Line Items]
Beginning balance	(50,255,768)	(47,624,482)	(45,855,788)
Dividend payable/paid	(156)	(337)	(585)
Shares withheld for tax withholding	(133,431)	(165,239)	(1,077,815)
Shares repurchased under stock repurchase programs	(338,577)	(2,492,994)	(689,891)
Shares issued to Directors	5,203	27,284	(403)
Ending balance	(50,722,729)	(50,255,768)	(47,624,482)
Common Stock Outstanding [Member]
Common Stock Outstanding [Line Items]
Beginning balance	82,573,407	84,794,930	84,174,138
Dividend payable/paid	112	216	479
Common stock issued	331,427	406,960
Common stock issued and exercise of stock options			2,387,145
Shares withheld for tax withholding	(133,431)	(165,239)	(1,077,815)
Shares repurchased under stock repurchase programs	(338,577)	(2,492,994)	(689,891)
Shares issued to Directors	6,511	29,534	874
Ending balance	82,439,449	82,573,407	84,794,930

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 725,983	$ 601,822	$ 563,648
Other comprehensive income (loss):
Foreign currency translation adjustments	(3,624)	4,771	2,037
Income tax effect	943	(62)	(776)
Foreign currency translation adjustments, net	(2,681)	4,709	1,261
Pension and other post-retirement adjustments	3,546	(1,675)	(6,477)
Income tax effect	(801)	686	1,036
Pension and other post-retirement adjustments, net	2,745	(989)	(5,441)
Other comprehensive income (loss), net of tax	64	3,720	(4,180)
Comprehensive income	$ 726,047	$ 605,542	$ 559,468