MSCI (MSCI) 10-Q 31 Oct 23 2023 Q3 Quarterly report Financial data

Cover Page

Cover Page - shares	9 Months Ended
	Sep. 30, 2023	Oct. 24, 2023
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2023
Document Transition Report	false
Entity File Number	001-33812
Entity Registrant Name	MSCI INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	13-4038723
Entity Address, Address Line One	7 World Trade Center
Entity Address, Address Line Two	250 Greenwich Street, 49th Floor
Entity Address, City or Town	New York
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	10007
City Area Code	212
Local Phone Number	804-3900
Title of 12(b) Security	Common stock, par value $0.01 per share
Trading Symbol	MSCI
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		79,091,190
Entity Central Index Key	0001408198
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q3
Current Fiscal Year End Date	--12-31
Amendment Flag	false

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents (includes restricted cash of $3,839 and $368 at September 30, 2023 and December 31, 2022, respectively)	$ 928,552	$ 993,564
Accounts receivable (net of allowances of $3,030 and $2,652 at September 30, 2023 and December 31, 2022, respectively)	603,266	663,236
Prepaid income taxes	54,544	36,654
Prepaid and other assets	52,967	54,520
Total current assets	1,639,329	1,747,974
Property, equipment and leasehold improvements, net	58,036	53,853
Right of use assets	117,533	126,584
Goodwill	2,230,389	2,229,670
Intangible assets, net	536,129	558,517
Equity method investment	210,657	214,389
Deferred tax assets	34,790	29,207
Other non-current assets	38,631	37,341
Total assets	4,865,494	4,997,535
Current liabilities:
Accounts payable	10,224	15,039
Income taxes payable	19,536	8,058
Accrued compensation and related benefits	157,227	182,370
Current portion of long-term debt	8,719	8,713
Other accrued liabilities	171,458	153,461
Deferred revenue	837,479	882,886
Total current liabilities	1,204,643	1,250,527
Long-term debt	4,500,063	4,503,233
Long-term operating lease liabilities	121,941	131,575
Deferred tax liabilities	4,220	29,098
Other non-current liabilities	83,723	91,027
Total liabilities	5,914,590	6,005,460
Commitments and Contingencies (see Note 7)
Shareholders’ equity (deficit):
Preferred stock (par value $0.01; 100,000,000 shares authorized; no shares issued)	0	0
Common stock (par value $0.01; 750,000,000 common shares authorized; 133,817,103 and 133,623,005 common shares issued and 79,091,098 and 79,959,989 common shares outstanding at September 30, 2023 and December 31, 2022, respectively)	1,338	1,336
Treasury shares, at cost (54,726,005 and 53,663,016 common shares held at September 30, 2023 and December 31, 2022, respectively)	(6,447,042)	(5,938,116)
Additional paid in capital	1,571,442	1,515,874
Retained earnings	3,886,188	3,473,192
Accumulated other comprehensive loss	(61,022)	(60,211)
Total shareholders’ equity (deficit)	(1,049,096)	(1,007,925)
Total liabilities and shareholders’ equity (deficit)	$ 4,865,494	$ 4,997,535

CONDENSED CONSOLIDATED STATEM_2

CONDENSED CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Statement of Financial Position [Abstract]
Restricted cash, current	$ 3,839	$ 368
Accounts receivable, allowance for credit loss, current	$ 3,030	$ 2,652
Preferred stock, par value (in USD per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	100,000,000	100,000,000
Preferred stock, shares issued (in shares)	0	0
Common stock, par value (in USD per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	750,000,000	750,000,000
Common stock, shares issued (in shares)	133,817,103	133,623,005
Common stock, shares outstanding (in shares)	79,091,098	79,959,989
Shares repurchased (in shares)	54,726,005	53,663,016

CONDENSED CONSOLIDATED STATEM_3

CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Income Statement [Abstract]
Operating revenues	$ 625,439	$ 560,639	$ 1,838,814	$ 1,672,390
Operating expenses:
Cost of revenues (exclusive of depreciation and amortization)	105,311	98,418	324,024	301,957
Selling and marketing	66,581	65,545	201,044	192,671
Research and development	31,438	25,941	92,901	78,179
General and administrative	36,826	30,702	113,527	112,993
Amortization of intangible assets	26,722	23,375	77,543	67,274
Depreciation and amortization of property, equipment and leasehold improvements	5,252	7,127	15,911	20,426
Total operating expenses	272,130	251,108	824,950	773,500
Operating income	353,309	309,531	1,013,864	898,890
Interest income	(10,314)	(3,938)	(31,079)	(5,160)
Interest expense	46,902	44,162	139,725	125,961
Other expense (income)	(935)	103	4,032	(90)
Other expense (income), net	35,653	40,327	112,678	120,711
Income before provision for income taxes	317,656	269,204	901,186	778,179
Provision for income taxes	57,997	52,612	155,974	122,577
Net income	$ 259,659	$ 216,592	$ 745,212	$ 655,602
Earnings per share:
Basic (in USD per share)	$ 3.28	$ 2.69	$ 9.36	$ 8.09
Diluted (in USD per share)	$ 3.27	$ 2.68	$ 9.32	$ 8.05
Weighted average shares outstanding:
Basic (in USD per share)	79,116	80,500	79,580	81,001
Diluted (in USD per share)	79,500	80,874	79,959	81,481

CONDENSED CONSOLIDATED STATEM_4

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 259,659	$ 216,592	$ 745,212	$ 655,602
Other comprehensive income (loss):
Foreign currency translation adjustments	(5,832)	(10,978)	1,046	(25,724)
Income tax effect	771	1,453	(660)	3,921
Foreign currency translation adjustments, net	(5,061)	(9,525)	386	(21,803)
Pension and other post-retirement adjustments	756	293	(1,338)	7,779
Income tax effect	(72)	(79)	141	(1,193)
Pension and other post-retirement adjustments, net	684	214	(1,197)	6,586
Other comprehensive (loss) income, net of tax	(4,377)	(9,311)	(811)	(15,217)
Comprehensive income	$ 255,282	$ 207,281	$ 744,401	$ 640,385

CONDENSED CONSOLIDATED STATEM_5

CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (DEFICIT) - USD ($) $ in Thousands	Total	Common Stock	Treasury Stock	Additional Paid in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)
Beginning Balance at Dec. 31, 2021	$ (163,467)	$ 1,332	$ (4,540,144)	$ 1,457,623	$ 2,976,517	$ (58,795)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	228,423				228,423
Dividends declared	(87,280)				(87,280)
Dividends paid in shares	77			77
Other comprehensive income (loss), net of tax	(2,022)					(2,022)
Common stock issued	4	4
Shares withheld for tax withholding	(105,000)		(105,000)
Compensation payable in common stock	22,754			22,754
Common stock repurchased and held in treasury	(772,657)		(772,657)
Common stock issued to Directors and (held in)/released from treasury	(21)		(21)
Ending Balance at Mar. 31, 2022	(879,189)	1,336	(5,417,822)	1,480,454	3,117,660	(60,817)
Beginning Balance at Dec. 31, 2021	(163,467)	1,332	(4,540,144)	1,457,623	2,976,517	(58,795)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	655,602
Ending Balance at Sep. 30, 2022	(1,077,391)	1,336	(5,867,881)	1,504,274	3,358,892	(74,012)
Beginning Balance at Mar. 31, 2022	(879,189)	1,336	(5,417,822)	1,480,454	3,117,660	(60,817)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	210,587				210,587
Dividends declared	(84,593)				(84,593)
Dividends paid in shares	22			22
Other comprehensive income (loss), net of tax	(3,884)					(3,884)
Common stock issued	0
Shares withheld for tax withholding	(3,862)		(3,862)
Compensation payable in common stock	11,858			11,858
Common stock repurchased and held in treasury	(276,994)		(276,994)
Common stock issued to Directors and (held in)/released from treasury	(391)		(391)
Ending Balance at Jun. 30, 2022	(1,026,446)	1,336	(5,699,069)	1,492,334	3,243,654	(64,701)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	216,592				216,592
Dividends declared	(101,354)				(101,354)
Dividends paid in shares	27			27
Other comprehensive income (loss), net of tax	(9,311)					(9,311)
Common stock issued	0
Shares withheld for tax withholding	(3,741)		(3,741)
Compensation payable in common stock	11,913			11,913
Common stock repurchased and held in treasury	(165,044)		(165,044)
Common stock issued to Directors and (held in)/released from treasury	(27)		(27)
Ending Balance at Sep. 30, 2022	(1,077,391)	1,336	(5,867,881)	1,504,274	3,358,892	(74,012)
Beginning Balance at Dec. 31, 2022	(1,007,925)	1,336	(5,938,116)	1,515,874	3,473,192	(60,211)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	238,728				238,728
Dividends declared	(111,986)				(111,986)
Dividends paid in shares	44			44
Other comprehensive income (loss), net of tax	2,775					2,775
Common stock issued	2	2
Shares withheld for tax withholding	(43,960)		(43,960)
Compensation payable in common stock	20,988			20,988
Common stock repurchased and held in treasury	0
Common stock issued to Directors and (held in)/released from treasury	(30)		(30)
Ending Balance at Mar. 31, 2023	(901,364)	1,338	(5,982,106)	1,536,906	3,599,934	(57,436)
Beginning Balance at Dec. 31, 2022	(1,007,925)	1,336	(5,938,116)	1,515,874	3,473,192	(60,211)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	745,212
Ending Balance at Sep. 30, 2023	(1,049,096)	1,338	(6,447,042)	1,571,442	3,886,188	(61,022)
Beginning Balance at Mar. 31, 2023	(901,364)	1,338	(5,982,106)	1,536,906	3,599,934	(57,436)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	246,825				246,825
Dividends declared	(110,383)				(110,383)
Dividends paid in shares	33			33
Other comprehensive income (loss), net of tax	791					791
Common stock issued	0
Shares withheld for tax withholding	(611)		(611)
Compensation payable in common stock	16,426			16,426
Common stock repurchased and held in treasury	(444,655)		(444,655)
Common stock issued to Directors and (held in)/released from treasury	(730)		(730)
Ending Balance at Jun. 30, 2023	(1,193,668)	1,338	(6,428,102)	1,553,365	3,736,376	(56,645)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	259,659				259,659
Dividends declared	(109,847)				(109,847)
Dividends paid in shares	30			30
Other comprehensive income (loss), net of tax	(4,377)					(4,377)
Common stock issued	0
Shares withheld for tax withholding	(871)		(871)
Compensation payable in common stock	18,047			18,047
Common stock repurchased and held in treasury	(18,039)		(18,039)
Common stock issued to Directors and (held in)/released from treasury	(30)		(30)
Ending Balance at Sep. 30, 2023	$ (1,049,096)	$ 1,338	$ (6,447,042)	$ 1,571,442	$ 3,886,188	$ (61,022)

CONDENSED CONSOLIDATED STATEM_6

CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (DEFICIT) (Parenthetical) - $ / shares	3 Months Ended						9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022
Statement of Stockholders' Equity [Abstract]
Dividend declared per common share (in USD per share)	$ 1.38	$ 1.38	$ 1.38	$ 1.25	$ 1.04	$ 1.04	$ 4.14	$ 3.33

CONDENSED CONSOLIDATED STATEM_7

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Cash flows from operating activities
Net income	$ 745,212	$ 655,602
Adjustments to reconcile net income to net cash provided by operating activities:
Amortization of intangible assets	77,543	67,274
Stock-based compensation expense	55,375	46,432
Depreciation and amortization of property, equipment and leasehold improvements	15,911	20,426
Amortization of right of use assets	17,484	18,555
Loss on impairment of right of use assets, net	0	705
Amortization of debt origination fees	3,791	3,868
Deferred taxes	(30,973)	59,324
Other adjustments	1,199	(3,654)
Changes in assets and liabilities:
Accounts receivable	58,132	127,043
Prepaid income taxes	(17,654)	(77,908)
Prepaid and other assets	1,687	(1,678)
Other non-current assets	(4,837)	32,547
Accounts payable	(5,719)	(8,144)
Income taxes payable	11,425	(52,939)
Accrued compensation and related benefits	(25,599)	(58,042)
Other accrued liabilities	15,118	31,297
Deferred revenue	(43,571)	(66,982)
Long-term operating lease liabilities	(16,027)	(19,492)
Other non-current liabilities	(11,195)	6,105
Other	(226)	(397)
Net cash provided by operating activities	847,076	779,942
Cash flows from investing activities
Capitalized software development costs	(50,080)	(44,425)
Capital expenditures	(18,942)	(8,012)
Other	(389)	24
Net cash used in investing activities	(69,411)	(52,413)
Cash flows from financing activities
Repurchase of common stock held in treasury	(504,161)	(1,327,298)
Payment of dividends	(331,640)	(272,759)
Repayment of borrowings	(6,563)	(5,000)
Proceeds from borrowings, inclusive of premium	0	355,000
Payment of debt issuance costs in connection with debt	0	(2,559)
Payment of contingent consideration	0	(211)
Net cash (used in) provided by financing activities	(842,364)	(1,252,827)
Effect of exchange rate changes	(313)	(29,039)
Net (decrease) increase in cash, cash equivalents and restricted cash	(65,012)	(554,337)
Cash, cash equivalents and restricted cash, beginning of period	993,564	1,421,449
Cash, cash equivalents and restricted cash, end of period	928,552	867,112
Supplemental disclosure of cash flow information:
Cash paid for interest	125,068	107,162
Cash paid for income taxes, net of refunds received	197,746	154,725
Supplemental disclosure of non-cash investing activities
Property, equipment and leasehold improvements in other accrued liabilities	4,734	1,926
Supplemental disclosure of non-cash financing activities
Cash dividends declared, but not yet paid	$ 1,453	$ 3,270

INTRODUCTION AND BASIS OF PRESE

INTRODUCTION AND BASIS OF PRESENTATION	9 Months Ended
	Sep. 30, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
INTRODUCTION AND BASIS OF PRESENTATION	INTRODUCTION AND BASIS OF PRESENTATION 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 and Use of Estimates The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they should be read in conjunction with the audited consolidated financial statements and notes included in our Annual Report on Form 10-K for the fiscal year ended December 31, 2022. If not materially different, certain note disclosures included therein have been omitted from these interim condensed consolidated financial statements. In the opinion of management, all adjustments, which consist of normal recurring adjustments necessary for a fair statement of the interim consolidated financial statements, have been included. The results of operations for interim periods are not necessarily indicative of results for the entire year. The Company’s unaudited condensed consolidated financial statements are prepared in accordance with GAAP. The Company makes certain estimates and judgments that can affect the reported amounts of assets and liabilities as of the date of the unaudited condensed 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 unaudited condensed consolidated financial statements are reasonable; however, actual results could differ materially from these estimates. Inter-company balances and transactions are eliminated in consolidation. Concentrations For the nine months ended September 30, 2023 and 2022, BlackRock, Inc. (“BlackRock”) accounted for 10.1% and 10.5% of the Company’s consolidated operating revenues, respectively. For the nine months ended September 30, 2023 and 2022, BlackRock accounted for 17.0% and 17.7% of the Index segment’s operating revenues, respectively. No single customer represented 10.0% or more of operating revenues within the Analytics, ESG and Climate or All Other – Private Assets segments for the nine months ended September 30, 2023 and 2022. Restricted Cash Restricted cash primarily relates to security deposits for certain operating leases that are legally restricted and unavailable for our general operations. Allowance for Credit Losses Changes in the allowance for credit losses from December 31, 2021 to September 30, 2023 were as follows: (in thousands) Amount Balance as of December 31, 2021 $ 2,337 Addition (reduction) to credit loss expense 910 Write-offs, net of recoveries (595) Balance as of December 31, 2022 $ 2,652 Addition (reduction) to credit loss expense 1,300 Write-offs, net of recoveries (922) Balance as of September 30, 2023 $ 3,030

RECENT ACCOUNTING PRONOUNCEMENT

RECENT ACCOUNTING PRONOUNCEMENTS	9 Months Ended
	Sep. 30, 2023
Accounting Changes and Error Corrections [Abstract]
RECENT ACCOUNTING PRONOUNCEMENTS	RECENT ACCOUNTING PRONOUNCEMENTSThere are no recently issued accounting standards updates that are currently expected to have a material impact on the Company.

REVENUE RECOGNITION

REVENUE RECOGNITION	9 Months Ended
	Sep. 30, 2023
Revenue from Contract with Customer [Abstract]
REVENUE RECOGNITION	REVENUE RECOGNITION MSCI’s operating revenues are reported by product type, which generally reflects the timing of recognition. The Company’s operating revenue 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 Three Months Ended September 30, 2023 Segments (in thousands) Index Analytics ESG and Climate All Other - Private Assets Total Operating Revenue Types Recurring subscriptions $ 206,453 $ 151,269 $ 71,744 $ 35,531 $ 464,997 Asset-based fees 141,066 — — — 141,066 Non-recurring 14,603 2,999 1,294 480 19,376 Total $ 362,122 $ 154,268 $ 73,038 $ 36,011 $ 625,439 For the Nine Months Ended September 30, 2023 Segments (in thousands) Index Analytics ESG and Climate All Other - Private Assets Total Operating Revenue Types Recurring subscriptions $ 603,845 $ 443,276 $ 207,523 $ 111,292 $ 1,365,936 Asset-based fees 412,354 — — — 412,354 Non-recurring 47,621 7,943 3,792 1,168 60,524 Total $ 1,063,820 $ 451,219 $ 211,315 $ 112,460 $ 1,838,814 For the Three Months Ended September 30, 2022 Segments (in thousands) Index Analytics ESG and Climate All Other - Private Assets Total Operating Revenue Types Recurring subscriptions $ 185,531 $ 142,751 $ 56,353 $ 35,581 $ 420,216 Asset-based fees 125,620 — — — 125,620 Non-recurring 11,089 2,164 1,242 308 14,803 Total $ 322,240 $ 144,915 $ 57,595 $ 35,889 $ 560,639 For the Nine Months Ended September 30, 2022 Segments (in thousands) Index Analytics ESG and Climate All Other - Private Assets Total Operating Revenue Types Recurring subscriptions $ 539,740 $ 420,047 $ 160,962 $ 106,276 $ 1,227,025 Asset-based fees 402,889 — — — 402,889 Non-recurring 31,319 6,349 3,790 1,018 42,476 Total $ 973,948 $ 426,396 $ 164,752 $ 107,294 $ 1,672,390 The tables that follow present the change in accounts receivable, net of allowances, and current deferred revenue between the dates indicated: (in thousands) Accounts receivable, net of allowances Deferred revenue Opening (December 31, 2022) $ 663,236 $ 882,886 Closing (September 30, 2023) 603,266 837,479 Increase/(decrease) $ (59,970) $ (45,407) (in thousands) Accounts receivable, net of allowances Deferred revenue Opening (December 31, 2021) $ 664,511 $ 824,912 Closing (September 30, 2022) 525,360 735,710 Increase/(decrease) $ (139,151) $ (89,202) The amounts of revenues recognized in the periods that were included in the opening current deferred revenue, which reflects contract liability amounts, were $171.8 million and $798.0 million for the three and nine months ended September 30, 2023, respectively and $149.4 million and $722.0 million for the three and nine months ended September 30, 2022, respectively. The difference between the opening and closing balances of the Company’s deferred revenue is primarily driven by an increase in the amortization of deferred revenue to operating revenues, partially offset by an increase in billings. As of September 30, 2023 and December 31, 2022, the Company carried a long-term deferred revenue balance of $28.0 million and $29.4 million, respectively, in “Other non-current liabilities” on the Unaudited Condensed 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 September 30, (in thousands) 2023 First 12-month period $ 695,027 Second 12-month period 420,056 Third 12-month period 182,375 Periods thereafter 135,442 Total $ 1,432,900

EARNINGS PER COMMON SHARE

EARNINGS PER COMMON SHARE	9 Months Ended
	Sep. 30, 2023
Earnings Per Share [Abstract]
EARNINGS PER COMMON SHARE	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. Diluted EPS reflects the assumed conversion of all dilutive securities, including, when applicable, restricted stock units (“RSUs”), performance stock units (“PSUs”) and performance stock options (“PSOs”). The following table presents the computation of basic and diluted EPS: Three Months Ended Nine Months Ended (in thousands, except per share data) 2023 2022 2023 2022 Net income $ 259,659 $ 216,592 $ 745,212 $ 655,602 Basic weighted average common shares outstanding 79,116 80,500 79,580 81,001 Effect of dilutive securities: PSUs, RSUs and PSOs 384 374 379 480 Diluted weighted average common shares outstanding 79,500 80,874 79,959 81,481 Earnings per common share: Basic $ 3.28 $ 2.69 $ 9.36 $ 8.09 Diluted $ 3.27 $ 2.68 $ 9.32 $ 8.05

PROPERTY, EQUIPMENT AND LEASEHO

PROPERTY, EQUIPMENT AND LEASEHOLD IMPROVEMENTS, NET	9 Months Ended
	Sep. 30, 2023
Property, Plant and Equipment [Abstract]
PROPERTY, EQUIPMENT AND LEASEHOLD IMPROVEMENTS, NET	PROPERTY, EQUIPMENT AND LEASEHOLD IMPROVEMENTS, NET Property, equipment and leasehold improvements, net consisted of the following as of the dates indicated: As of September 30, December 31, (in thousands) 2023 2022 Computer & related equipment $ 193,113 $ 181,710 Furniture & fixtures 15,643 14,078 Leasehold improvements 58,019 54,040 Work-in-process 860 2,373 Subtotal 267,635 252,201 Accumulated depreciation and amortization (209,599) (198,348) Property, equipment and leasehold improvements, net $ 58,036 $ 53,853 Depreciation and amortization expense of property, equipment and leasehold improvements was $5.3 million and $7.1 million for the three months ended September 30, 2023 and 2022, respectively.

GOODWILL AND INTANGIBLE ASSETS,

GOODWILL AND INTANGIBLE ASSETS, NET	9 Months Ended
	Sep. 30, 2023
Goodwill and Intangible Assets Disclosure [Abstract]
GOODWILL AND INTANGIBLE ASSETS, NET	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, 2022 $ 1,201,622 $ 290,976 $ 48,047 $ 689,025 $ 2,229,670 Foreign exchange translation adjustment 445 — — 274 719 Goodwill at September 30, 2023 $ 1,202,067 $ 290,976 $ 48,047 $ 689,299 $ 2,230,389 The Company completed its annual goodwill impairment test as of July 1, 2023 on its Index, Analytics, ESG and Climate, and Real Assets reporting units, which are also four of the Company’s operating segments, and no impairments were noted. The Company determined that it was not more likely than not that the fair value of its reporting units is less than their respective carrying values. See Note 11, “Segment Information,” for further descriptions of the Company’s operating segments. Intangible Assets, Net The following table presents the amount of amortization expense related to intangible assets by category for the periods indicated: Three Months Ended Nine Months Ended (in thousands) 2023 2022 2023 2022 Amortization expense of acquired intangible assets $ 15,748 $ 15,810 $ 47,430 $ 47,562 Amortization expense of internally developed capitalized software 10,974 7,565 30,113 19,712 Total amortization of intangible assets expense $ 26,722 $ 23,375 $ 77,543 $ 67,274 The gross carrying and accumulated amortization amounts related to the Company’s intangible assets were as follows: As of September 30, December 31, (in thousands) 2023 2022 Gross intangible assets: Customer relationships $ 532,500 $ 532,500 Proprietary data 220,778 220,778 Acquired technology and software 209,220 209,220 Trademarks 208,190 208,190 Internally developed capitalized software 220,251 165,928 Subtotal 1,390,939 1,336,616 Foreign exchange translation adjustment (12,478) (13,214) Total gross intangible assets $ 1,378,461 $ 1,323,402 Accumulated amortization: Customer relationships $ (331,275) $ (308,437) Proprietary data (56,125) (41,783) Acquired technology and software (182,920) (179,833) Trademarks (169,207) (162,044) Internally developed capitalized software (106,888) (77,259) Subtotal (846,415) (769,356) Foreign exchange translation adjustment 4,083 4,471 Total accumulated amortization $ (842,332) $ (764,885) Net intangible assets: Customer relationships $ 201,225 $ 224,063 Proprietary data 164,653 178,995 Acquired technology and software 26,300 29,387 Trademarks 38,983 46,146 Internally developed capitalized software 113,363 88,670 Subtotal 544,524 567,260 Foreign exchange translation adjustment (8,395) (8,743) Total net intangible assets $ 536,129 $ 558,517 The following table presents the estimated amortization expense for the remainder of the year ending December 31, 2023 and succeeding years: Years Ending December 31, Amortization Remainder of 2023 $ 28,555 2024 109,796 2025 84,575 2026 49,965 2027 36,755 Thereafter 226,483 Total $ 536,129

COMMITMENTS AND CONTINGENCIES

COMMITMENTS AND CONTINGENCIES	9 Months Ended
	Sep. 30, 2023
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS AND CONTINGENCIES	COMMITMENTS AND CONTINGENCIES As of September 30, 2023, the Company had outstanding an aggregate of $4,200.0 million in senior unsecured notes (collectively, the “Senior Notes”) and an aggregate of $341.3 million in senior unsecured tranche A term loans (the “Tranche A Term Loans”) under the term loan A facility (the “TLA Facility”), as presented in the table below: Principal Carrying Carrying Fair Fair (in thousands) Maturity Date September 30, 2023 September 30, 2023 December 31, 2022 September 30, 2023 December 31, 2022 Debt 4.000% senior unsecured notes due 2029 November 15, 2029 $ 1,000,000 $ 993,364 $ 992,546 $ 872,670 $ 876,240 3.625% senior unsecured notes due 2030 September 1, 2030 900,000 895,421 894,925 755,433 751,113 3.875% senior unsecured notes due 2031 February 15, 2031 1,000,000 991,887 991,067 867,600 833,130 3.625% senior unsecured notes due 2031 November 1, 2031 600,000 594,688 594,195 491,928 500,880 3.250% senior unsecured notes due 2033 August 15, 2033 700,000 693,364 692,862 537,551 542,696 Variable rate Tranche A Term Loans due 2027 February 16, 2027 341,250 340,057 346,352 339,544 346,073 Total debt (1) $ 4,541,250 $ 4,508,781 $ 4,511,947 $ 3,864,726 $ 3,850,132 ___________________________ (1) Includes $8.7 million of current-portion of long-term debt. Maturities of the Company’s principal debt payments as of September 30, 2023 are as follows: Maturity of Principal Debt Payments Amounts Remainder of 2023 $ 2,187 2024 10,938 2025 19,687 2026 26,250 2027 282,188 Thereafter 4,200,000 Total debt $ 4,541,250 Interest payments attributable to the Company’s outstanding indebtedness are due as presented in the following table: Interest payment frequency First interest Senior Notes and Tranche A Term Loans 4.000% senior unsecured notes due 2029 Semi-Annual May 15 3.625% senior unsecured notes due 2030 Semi-Annual March 1 3.875% senior unsecured notes due 2031 Semi-Annual June 1 3.625% senior unsecured notes due 2031 Semi-Annual May 1 3.250% senior unsecured notes due 2033 Semi-Annual February 15 Variable rate Tranche A Term Loans due 2027 Variable July 11 The fair market value of the Company’s debt obligations represent Level 2 valuations. The Company utilized the market approach and obtained security pricing from a vendor who used broker quotes and third-party pricing services to determine fair values. Credit Agreement. Since November 20, 2014, the Company has maintained a revolving credit agreement with a syndicate of banks. On June 9, 2022, the Company, the guarantors party thereto and the lenders and agents party thereto, entered into an Amended and Restated Credit Agreement (the “Credit Agreement”), amending and restating in its entirety the Company’s prior revolving credit agreement (the “Prior Revolving Credit Agreement”). The Credit Agreement makes available to the Company an aggregate of $500.0 million of revolving loan commitments, which may be drawn until February 16, 2027, and the TLA Facility. At September 30, 2023, the revolving loan commitments were undrawn. As noted above, at September 30, 2023, the commitments under the TLA Facility were drawn in full, and the resulting Tranche A Term Loans mature on February 16, 2027. The obligations under the Credit Agreement are general unsecured obligations of the Company and the guarantors. Interest on the Tranche A Term Loans under the TLA Facility accrues, at a variable rate, based on the secured overnight funding rate (“SOFR”) or the alternate base rate (“Base Rate”), plus, in each case, an applicable margin and will be due on each Interest Payment Date (as defined in the Credit Agreement). The applicable margin is calculated by reference to the Company’s Consolidated Leverage Ratio (as defined in the Credit Agreement) and ranges between 1.50% to 2.00% for SOFR loans, and 0.50% to 1.00% for Base Rate loans. At September 30, 2023, the interest rate on the TLA Facility was 7.42%. In connection with the closings of the Senior Notes offerings, entry into the Prior Revolving Credit Agreement and the subsequent amendments thereto and entry into the Credit Agreement, 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 September 30, 2023, $34.2 million of the deferred financing fees and premium remain unamortized, $0.5 million of which is included in “Prepaid and other assets,” $1.2 million of which is included in “Other non-current assets” and $32.5 million of which is included in “Long-term debt” on the Unaudited Condensed Consolidated Statement of Financial Condition.

LEASES

LEASES	9 Months Ended
	Sep. 30, 2023
Leases [Abstract]
LEASES	LEASES The components of lease expense (income) of the Company’s operating leases are as follows: Three Months Ended Nine Months Ended (in thousands) 2023 2022 2023 2022 Operating lease expenses $ 7,278 $ 7,308 $ 21,570 $ 22,439 Variable lease costs 1,022 808 2,843 2,411 Short-term lease costs 108 123 547 333 Sublease income (1,276) $ (1,251) $ (3,827) $ (3,354) Total lease costs $ 7,132 $ 6,988 $ 21,133 $ 21,829 Maturities of the Company’s operating lease liabilities as of September 30, 2023 are as follows: Maturity of Lease Liabilities Operating (in thousands) Leases Remainder of 2023 $ 6,098 2024 27,182 2025 24,202 2026 22,408 2027 17,691 Thereafter 67,096 Total lease payments $ 164,677 Less: Interest (20,632) Present value of lease liabilities $ 144,045 Other accrued liabilities $ 22,104 Long-term operating lease liabilities $ 121,941 Weighted-average remaining lease term and discount rate for the Company’s operating leases are as follows: As of September 30, December 31, Lease Term and Discount Rate 2023 2022 Weighted-average remaining lease term (years) 7.30 7.86 Weighted-average discount rate 3.58 % 3.40 % Other information related to the Company’s operating leases are as follows: Other Information Nine Months Ended (in thousands) 2023 2022 Operating cash flows used for operating leases $ 22,918 $ 22,025 Right of use assets obtained in exchange for new $ 8,896 $ 14,929

SHAREHOLDERS' EQUITY (DEFICIT)

SHAREHOLDERS' EQUITY (DEFICIT)	9 Months Ended
	Sep. 30, 2023
Equity [Abstract]
SHAREHOLDERS' EQUITY (DEFICIT)	SHAREHOLDERS’ EQUITY (DEFICIT) Return of capital On July 28, 2022, the Board of Directors authorized a stock repurchase program (the “2022 Repurchase Program”) for the purchase of up to $1,000.0 million worth of shares of MSCI’s common stock in addition to the $539.1 million of authorization then remaining under a previously existing share repurchase program that was replaced by, and incorporated into, the 2022 Repurchase Program for a total of $1,539.1 million of stock repurchase authorization available under the 2022 Repurchase Program. Share repurchases made pursuant to the 2022 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 September 30, 2023, there was $845.7 million of available authorization remaining under the 2022 Repurchase Program. The following table provides information with respect to repurchases of the Company’s common stock made on the open market: Nine months ended (in thousands, except per share data) Average Total Dollar Value of Shares Repurchased (1) September 30, 2023 $ 468.26 980 $ 458,721 September 30, 2022 $ 473.26 2,567 $ 1,214,695 ___________________________ (1) As of January 1, 2023, the Company’s share repurchases in excess of issuances are subject to a 1% excise tax enacted by the Inflation Reduction Act. The values in this column exclude the 1% excise tax incurred on share repurchases. Any excise tax incurred is recognized as part of the cost of the shares acquired in the Unaudited Condensed Consolidated Statement of Shareholders’ Equity (Deficit) The following table presents dividends declared per common share as well as total amounts declared, distributed and deferred for the periods indicated: Dividends (in thousands, except per share data) Per Share Declared Distributed (Released)/Deferred 2023 Three Months Ended March 31, $ 1.38 $ 111,986 $ 112,189 $ (203) Three Months Ended June 30, 1.38 110,383 110,147 236 Three Months Ended September 30, 1.38 109,847 109,408 439 Total $ 4.14 $ 332,216 $ 331,744 $ 472 2022 Three Months Ended March 31, $ 1.04 $ 87,280 $ 87,846 $ (566) Three Months Ended June 30, 1.04 84,593 84,189 404 Three Months Ended September 30, 1.25 101,354 100,849 505 Total $ 3.33 $ 273,227 $ 272,884 $ 343 Common Stock The following table presents activity related to shares of common stock issued and repurchased during the nine months ended September 30, 2023: Common Stock Treasury Common Stock Issued Stock Outstanding Balance at December 31, 2022 133,623,005 (53,663,016) 79,959,989 Dividend payable/paid 24 — 24 Common stock issued 181,875 — 181,875 Shares withheld for tax withholding — (78,844) (78,844) Shares repurchased under stock repurchase programs — — — Shares issued to directors 58 (58) — Balance at March 31, 2023 133,804,962 (53,741,918) 80,063,044 Dividend payable/paid — — — Common stock issued 2,698 — 2,698 Shares withheld for tax withholding — (1,270) (1,270) Shares repurchased under stock repurchase programs — (941,360) (941,360) Shares issued to directors 5,306 (1,515) 3,791 Balance at June 30, 2023 133,812,966 (54,686,063) 79,126,903 Dividend payable/paid — — — Common stock issued 4,081 — 4,081 Shares withheld for tax withholding — (1,623) (1,623) Shares repurchased under stock repurchase programs — (38,263) (38,263) Shares issued to directors 56 (56) — Balance at September 30, 2023 133,817,103 (54,726,005) 79,091,098

INCOME TAXES

INCOME TAXES	9 Months Ended
	Sep. 30, 2023
Income Tax Disclosure [Abstract]
INCOME TAXES	INCOME TAXES The Company’s provision for income taxes was $156.0 million and $122.6 million for the nine months ended September 30, 2023 and 2022, respectively. The effective tax rate of 17.3% for the nine months ended September 30, 2023 reflects the Company’s estimate of the effective tax rate for the period and was impacted by certain favorable discrete items totaling $19.8 million, related to $11.4 million of excess tax benefits recognized on share-based compensation vested during the period and $8.4 million related to prior-year items. The effective tax rate of 15.8% for the nine months ended September 30, 2022 reflects the Company’s estimate of the effective tax rate for the period and was impacted by certain favorable discrete items totaling $28.2 million, primarily related to $28.4 million of excess tax benefits recognized on share-based compensation vested during the period. The Company is under or open to examination by the IRS and other tax authorities in certain jurisdictions, including foreign jurisdictions, such as the United Kingdom, Switzerland and India, and states in the United States in which the Company has significant operations, such as New York and California. The tax years currently under or open to examination vary by jurisdiction but include years from 2008 onwards. 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 $22.9 million in the next twelve months as a result of the resolution of prior-year items. During the three and nine months ended September 30, 2023, the Company’s unrecognized tax benefits increased $0.4 million and decreased $4.4 million, respectively, principally due to the resolution of prior-year items.

SEGMENT INFORMATION

SEGMENT INFORMATION	9 Months Ended
	Sep. 30, 2023
Segment Reporting [Abstract]
SEGMENT INFORMATION	SEGMENT INFORMATION The Company has five operating segments: Index, Analytics, ESG and Climate, Real Assets and The Burgiss Group, LLC (“Burgiss”), which are presented as the following four reportable segments: Index, Analytics, ESG and Climate and All Other – Private Assets. The Index operating segment offers equity and fixed income indexes. The indexes are used in many areas of the investment process, including for developing indexed financial products (e.g., Exchange Traded Funds (“ETFs”), mutual funds, annuities, futures, options, structured products and 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 Assets operating segment offers data, benchmarks, return-analytics, climate assessments and market insights for tangible assets such as real estate and infrastructure. In addition, Real Assets performance and risk analytics range from enterprise-wide to property-specific analysis. The Real Assets operating segment also provides business intelligence products to real estate owners, managers, developers and brokers worldwide. As of September 30, 2023, the Burgiss operating segment represents the Company’s equity method investment in Burgiss, a global provider of investment decision support tools for private capital. See Note 12, “Subsequent Events” for additional information on the Company’s acquisition of the remaining interest in Burgiss. The Chief Operating Decision Maker (“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 certain non-recurring acquisition-related integration and transaction costs, 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 following table presents operating revenues by reportable segment for the periods indicated: Three Months Ended Nine Months Ended (in thousands) 2023 2022 2023 2022 Operating revenues Index $ 362,122 $ 322,240 $ 1,063,820 $ 973,948 Analytics 154,268 144,915 451,219 426,396 ESG and Climate 73,038 57,595 211,315 164,752 All Other - Private Assets 36,011 35,889 112,460 107,294 Total $ 625,439 $ 560,639 $ 1,838,814 $ 1,672,390 The following table presents segment profitability and a reconciliation to net income for the periods indicated: Three Months Ended Nine Months Ended (in thousands) 2023 2022 2023 2022 Index Adjusted EBITDA $ 277,672 $ 245,967 $ 808,424 $ 737,012 Analytics Adjusted EBITDA 71,781 67,634 197,710 181,484 ESG and Climate Adjusted EBITDA 25,440 15,910 66,114 42,334 All Other - Private Assets Adjusted EBITDA 11,396 11,450 36,076 29,819 Total operating segment profitability 386,289 340,961 1,108,324 990,649 Amortization of intangible assets 26,722 23,375 77,543 67,274 Depreciation and amortization of property, equipment and leasehold improvements 5,252 7,127 15,911 20,426 Acquisition-related integration and transaction costs (1) 1,006 928 1,006 4,059 Operating income 353,309 309,531 1,013,864 898,890 Other expense (income), net 35,653 40,327 112,678 120,711 Provision for income taxes 57,997 52,612 155,974 122,577 Net income $ 259,659 $ 216,592 $ 745,212 $ 655,602 ___________________________ (1) Represents transaction expenses and other costs directly related to the acquisition and integration of acquired businesses, including professional fees, severance expenses, regulatory filing fees and other costs, in each case that are incurred no later than 12 months after the close of the relevant acquisition. Operating revenues by geography are primarily based on the shipping address of the ultimate customer utilizing the product. The following table presents operating revenues by geographic area for the periods indicated: Three Months Ended Nine Months Ended (in thousands) 2023 2022 2023 2022 Operating revenues Americas: United States $ 246,089 $ 233,196 $ 740,939 $ 696,284 Other 28,243 24,450 83,353 70,559 Total Americas 274,332 257,646 824,292 766,843 Europe, the Middle East and Africa ("EMEA"): United Kingdom 105,036 88,681 296,388 264,854 Other 142,826 125,607 420,996 379,695 Total EMEA 247,862 214,288 717,384 644,549 Asia & Australia: Japan 24,956 21,784 75,258 67,817 Other 78,289 66,921 221,880 193,181 Total Asia & Australia 103,245 88,705 297,138 260,998 Total $ 625,439 $ 560,639 $ 1,838,814 $ 1,672,390 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 September 30, December 31, (in thousands) 2023 2022 Long-lived assets Americas: United States $ 201,309 $ 179,453 Other 11,974 11,971 Total Americas 213,283 191,424 EMEA: United Kingdom 18,346 19,674 Other 21,808 23,099 Total EMEA 40,154 42,773 Asia & Australia: Japan 1,268 652 Other 33,017 32,962 Total Asia & Australia 34,285 33,614 Total $ 287,722 $ 267,811

SUBSEQUENT EVENTS

SUBSEQUENT EVENTS	9 Months Ended
	Sep. 30, 2023
Subsequent Events [Abstract]
SUBSEQUENT EVENTS	SUBSEQUENT EVENTS On October 30, 2023, the Board of Directors declared a quarterly cash dividend of $1.38 per share for the three months ending December 31, 2023 (“fourth quarter 2023”). The fourth quarter 2023 dividend is payable on November 30, 2023 to shareholders of record as of the close of trading on November 9, 2023. On October 2, 2023, the Company acquired the remaining 66.4% interest in Burgiss for $696.8 million in cash. The Company’s existing 33.6% interest had a fair value at acquisition date of $353.2 million which resulted non-taxable gain of approximately $140 million, to be recorded during the three months ending December 31, 2023. The results of Burgiss will be included in the Company’s All Other - Private Assets reportable segment. The acquisition of Burgiss will provide the Company with comprehensive data and deep expertise in all private assets, enabling investors to evaluate fundamental information, measure and compare performance, understand exposures, manage risk, and conduct robust analytics. The acquisition will also expand the Company’s robust suite of multi-asset class technology solutions with the industry leading Burgiss Caissa Platform, developed exclusively for institutional investors and providing a comprehensive view of the drivers of performance and risk in both public and private investments in total portfolios.

Pay vs Performance Disclosure

Pay vs Performance Disclosure - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022
Pay vs Performance Disclosure
Net income	$ 259,659	$ 246,825	$ 238,728	$ 216,592	$ 210,587	$ 228,423	$ 745,212	$ 655,602

Insider Trading Arrangements

Insider Trading Arrangements	3 Months Ended
	Sep. 30, 2023
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

INTRODUCTION AND BASIS OF PRE_2

INTRODUCTION AND BASIS OF PRESENTATION (Policies)	9 Months Ended
	Sep. 30, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation and Use of Estimates The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they should be read in conjunction with the audited consolidated financial statements and notes included in our Annual Report on Form 10-K for the fiscal year ended December 31, 2022. If not materially different, certain note disclosures included therein have been omitted from these interim condensed consolidated financial statements. In the opinion of management, all adjustments, which consist of normal recurring adjustments necessary for a fair statement of the interim consolidated financial statements, have been included. The results of operations for interim periods are not necessarily indicative of results for the entire year.
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 unaudited condensed 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 unaudited condensed consolidated financial statements are reasonable; however, actual results could differ materially from these estimates. Inter-company balances and transactions are eliminated in consolidation.
Concentrations	Concentrations For the nine months ended September 30, 2023 and 2022, BlackRock, Inc. (“BlackRock”) accounted for 10.1% and 10.5% of the Company’s consolidated operating revenues, respectively. For the nine months ended September 30, 2023 and 2022, BlackRock accounted for 17.0% and 17.7% of the Index segment’s operating revenues, respectively. No single customer represented 10.0% or more of operating revenues within the Analytics, ESG and Climate or All Other – Private Assets segments for the nine months ended September 30, 2023 and 2022.
Restricted Cash	Restricted CashRestricted cash primarily relates to security deposits for certain operating leases that are legally restricted and unavailable for our general operations.

INTRODUCTION AND BASIS OF PRE_3

INTRODUCTION AND BASIS OF PRESENTATION (Tables)	9 Months Ended
	Sep. 30, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Changes in Allowance for Doubtful Accounts	Changes in the allowance for credit losses from December 31, 2021 to September 30, 2023 were as follows: (in thousands) Amount Balance as of December 31, 2021 $ 2,337 Addition (reduction) to credit loss expense 910 Write-offs, net of recoveries (595) Balance as of December 31, 2022 $ 2,652 Addition (reduction) to credit loss expense 1,300 Write-offs, net of recoveries (922) Balance as of September 30, 2023 $ 3,030

REVENUE RECOGNITION (Tables)

REVENUE RECOGNITION (Tables)	9 Months Ended
	Sep. 30, 2023
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 Three Months Ended September 30, 2023 Segments (in thousands) Index Analytics ESG and Climate All Other - Private Assets Total Operating Revenue Types Recurring subscriptions $ 206,453 $ 151,269 $ 71,744 $ 35,531 $ 464,997 Asset-based fees 141,066 — — — 141,066 Non-recurring 14,603 2,999 1,294 480 19,376 Total $ 362,122 $ 154,268 $ 73,038 $ 36,011 $ 625,439 For the Nine Months Ended September 30, 2023 Segments (in thousands) Index Analytics ESG and Climate All Other - Private Assets Total Operating Revenue Types Recurring subscriptions $ 603,845 $ 443,276 $ 207,523 $ 111,292 $ 1,365,936 Asset-based fees 412,354 — — — 412,354 Non-recurring 47,621 7,943 3,792 1,168 60,524 Total $ 1,063,820 $ 451,219 $ 211,315 $ 112,460 $ 1,838,814 For the Three Months Ended September 30, 2022 Segments (in thousands) Index Analytics ESG and Climate All Other - Private Assets Total Operating Revenue Types Recurring subscriptions $ 185,531 $ 142,751 $ 56,353 $ 35,581 $ 420,216 Asset-based fees 125,620 — — — 125,620 Non-recurring 11,089 2,164 1,242 308 14,803 Total $ 322,240 $ 144,915 $ 57,595 $ 35,889 $ 560,639 For the Nine Months Ended September 30, 2022 Segments (in thousands) Index Analytics ESG and Climate All Other - Private Assets Total Operating Revenue Types Recurring subscriptions $ 539,740 $ 420,047 $ 160,962 $ 106,276 $ 1,227,025 Asset-based fees 402,889 — — — 402,889 Non-recurring 31,319 6,349 3,790 1,018 42,476 Total $ 973,948 $ 426,396 $ 164,752 $ 107,294 $ 1,672,390
Schedule of Change in Accounts Receivable and Current Deferred Revenue	The tables that follow present the change in accounts receivable, net of allowances, and current deferred revenue between the dates indicated: (in thousands) Accounts receivable, net of allowances Deferred revenue Opening (December 31, 2022) $ 663,236 $ 882,886 Closing (September 30, 2023) 603,266 837,479 Increase/(decrease) $ (59,970) $ (45,407) (in thousands) Accounts receivable, net of allowances Deferred revenue Opening (December 31, 2021) $ 664,511 $ 824,912 Closing (September 30, 2022) 525,360 735,710 Increase/(decrease) $ (139,151) $ (89,202)
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 September 30, (in thousands) 2023 First 12-month period $ 695,027 Second 12-month period 420,056 Third 12-month period 182,375 Periods thereafter 135,442 Total $ 1,432,900

EARNINGS PER COMMON SHARE (Tabl

EARNINGS PER COMMON SHARE (Tables)	9 Months Ended
	Sep. 30, 2023
Earnings Per Share [Abstract]
Computation of Basic and Diluted EPS	The following table presents the computation of basic and diluted EPS: Three Months Ended Nine Months Ended (in thousands, except per share data) 2023 2022 2023 2022 Net income $ 259,659 $ 216,592 $ 745,212 $ 655,602 Basic weighted average common shares outstanding 79,116 80,500 79,580 81,001 Effect of dilutive securities: PSUs, RSUs and PSOs 384 374 379 480 Diluted weighted average common shares outstanding 79,500 80,874 79,959 81,481 Earnings per common share: Basic $ 3.28 $ 2.69 $ 9.36 $ 8.09 Diluted $ 3.27 $ 2.68 $ 9.32 $ 8.05

PROPERTY, EQUIPMENT AND LEASE_2

PROPERTY, EQUIPMENT AND LEASEHOLD IMPROVEMENTS, NET (Tables)	9 Months Ended
	Sep. 30, 2023
Property, Plant and Equipment [Abstract]
Schedule of Property, Equipment and Leasehold Improvements, Net	Property, equipment and leasehold improvements, net consisted of the following as of the dates indicated: As of September 30, December 31, (in thousands) 2023 2022 Computer & related equipment $ 193,113 $ 181,710 Furniture & fixtures 15,643 14,078 Leasehold improvements 58,019 54,040 Work-in-process 860 2,373 Subtotal 267,635 252,201 Accumulated depreciation and amortization (209,599) (198,348) Property, equipment and leasehold improvements, net $ 58,036 $ 53,853

GOODWILL AND INTANGIBLE ASSET_2

GOODWILL AND INTANGIBLE ASSETS, NET (Tables)	9 Months Ended
	Sep. 30, 2023
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, 2022 $ 1,201,622 $ 290,976 $ 48,047 $ 689,025 $ 2,229,670 Foreign exchange translation adjustment 445 — — 274 719 Goodwill at September 30, 2023 $ 1,202,067 $ 290,976 $ 48,047 $ 689,299 $ 2,230,389
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: Three Months Ended Nine Months Ended (in thousands) 2023 2022 2023 2022 Amortization expense of acquired intangible assets $ 15,748 $ 15,810 $ 47,430 $ 47,562 Amortization expense of internally developed capitalized software 10,974 7,565 30,113 19,712 Total amortization of intangible assets expense $ 26,722 $ 23,375 $ 77,543 $ 67,274
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 September 30, December 31, (in thousands) 2023 2022 Gross intangible assets: Customer relationships $ 532,500 $ 532,500 Proprietary data 220,778 220,778 Acquired technology and software 209,220 209,220 Trademarks 208,190 208,190 Internally developed capitalized software 220,251 165,928 Subtotal 1,390,939 1,336,616 Foreign exchange translation adjustment (12,478) (13,214) Total gross intangible assets $ 1,378,461 $ 1,323,402 Accumulated amortization: Customer relationships $ (331,275) $ (308,437) Proprietary data (56,125) (41,783) Acquired technology and software (182,920) (179,833) Trademarks (169,207) (162,044) Internally developed capitalized software (106,888) (77,259) Subtotal (846,415) (769,356) Foreign exchange translation adjustment 4,083 4,471 Total accumulated amortization $ (842,332) $ (764,885) Net intangible assets: Customer relationships $ 201,225 $ 224,063 Proprietary data 164,653 178,995 Acquired technology and software 26,300 29,387 Trademarks 38,983 46,146 Internally developed capitalized software 113,363 88,670 Subtotal 544,524 567,260 Foreign exchange translation adjustment (8,395) (8,743) Total net intangible assets $ 536,129 $ 558,517
Estimated Amortization Expense for Remainder of 2022 and Succeeding Years	The following table presents the estimated amortization expense for the remainder of the year ending December 31, 2023 and succeeding years: Years Ending December 31, Amortization Remainder of 2023 $ 28,555 2024 109,796 2025 84,575 2026 49,965 2027 36,755 Thereafter 226,483 Total $ 536,129

COMMITMENTS AND CONTINGENCIES (

COMMITMENTS AND CONTINGENCIES (Tables)	9 Months Ended
	Sep. 30, 2023
Commitments and Contingencies Disclosure [Abstract]
Schedule of Senior Unsecured Notes	As of September 30, 2023, the Company had outstanding an aggregate of $4,200.0 million in senior unsecured notes (collectively, the “Senior Notes”) and an aggregate of $341.3 million in senior unsecured tranche A term loans (the “Tranche A Term Loans”) under the term loan A facility (the “TLA Facility”), as presented in the table below: Principal Carrying Carrying Fair Fair (in thousands) Maturity Date September 30, 2023 September 30, 2023 December 31, 2022 September 30, 2023 December 31, 2022 Debt 4.000% senior unsecured notes due 2029 November 15, 2029 $ 1,000,000 $ 993,364 $ 992,546 $ 872,670 $ 876,240 3.625% senior unsecured notes due 2030 September 1, 2030 900,000 895,421 894,925 755,433 751,113 3.875% senior unsecured notes due 2031 February 15, 2031 1,000,000 991,887 991,067 867,600 833,130 3.625% senior unsecured notes due 2031 November 1, 2031 600,000 594,688 594,195 491,928 500,880 3.250% senior unsecured notes due 2033 August 15, 2033 700,000 693,364 692,862 537,551 542,696 Variable rate Tranche A Term Loans due 2027 February 16, 2027 341,250 340,057 346,352 339,544 346,073 Total debt (1) $ 4,541,250 $ 4,508,781 $ 4,511,947 $ 3,864,726 $ 3,850,132 ___________________________ (1) Includes $8.7 million of current-portion of long-term debt.
Schedule of Maturities of Long-Term Debt	Maturities of the Company’s principal debt payments as of September 30, 2023 are as follows: Maturity of Principal Debt Payments Amounts Remainder of 2023 $ 2,187 2024 10,938 2025 19,687 2026 26,250 2027 282,188 Thereafter 4,200,000 Total debt $ 4,541,250
Schedule of Interest Payments Due Attributable to Outstanding indebtedness	Interest payments attributable to the Company’s outstanding indebtedness are due as presented in the following table: Interest payment frequency First interest Senior Notes and Tranche A Term Loans 4.000% senior unsecured notes due 2029 Semi-Annual May 15 3.625% senior unsecured notes due 2030 Semi-Annual March 1 3.875% senior unsecured notes due 2031 Semi-Annual June 1 3.625% senior unsecured notes due 2031 Semi-Annual May 1 3.250% senior unsecured notes due 2033 Semi-Annual February 15 Variable rate Tranche A Term Loans due 2027 Variable July 11

LEASES (Tables)

LEASES (Tables)	9 Months Ended
	Sep. 30, 2023
Leases [Abstract]
Schedule of Components of Lease Expense (Income), Weighted-Average Remaining Lease Term and Discount Rate, and Other Information Related to the Company's Operating Leases	The components of lease expense (income) of the Company’s operating leases are as follows: Three Months Ended Nine Months Ended (in thousands) 2023 2022 2023 2022 Operating lease expenses $ 7,278 $ 7,308 $ 21,570 $ 22,439 Variable lease costs 1,022 808 2,843 2,411 Short-term lease costs 108 123 547 333 Sublease income (1,276) $ (1,251) $ (3,827) $ (3,354) Total lease costs $ 7,132 $ 6,988 $ 21,133 $ 21,829 Weighted-average remaining lease term and discount rate for the Company’s operating leases are as follows: As of September 30, December 31, Lease Term and Discount Rate 2023 2022 Weighted-average remaining lease term (years) 7.30 7.86 Weighted-average discount rate 3.58 % 3.40 % Other information related to the Company’s operating leases are as follows: Other Information Nine Months Ended (in thousands) 2023 2022 Operating cash flows used for operating leases $ 22,918 $ 22,025 Right of use assets obtained in exchange for new $ 8,896 $ 14,929
Summary of Maturities of Operating Lease Liability	Maturities of the Company’s operating lease liabilities as of September 30, 2023 are as follows: Maturity of Lease Liabilities Operating (in thousands) Leases Remainder of 2023 $ 6,098 2024 27,182 2025 24,202 2026 22,408 2027 17,691 Thereafter 67,096 Total lease payments $ 164,677 Less: Interest (20,632) Present value of lease liabilities $ 144,045 Other accrued liabilities $ 22,104 Long-term operating lease liabilities $ 121,941

SHAREHOLDERS' EQUITY (DEFICIT)

SHAREHOLDERS' EQUITY (DEFICIT) (Tables)	9 Months Ended
	Sep. 30, 2023
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: Nine months ended (in thousands, except per share data) Average Total Dollar Value of Shares Repurchased (1) September 30, 2023 $ 468.26 980 $ 458,721 September 30, 2022 $ 473.26 2,567 $ 1,214,695 ___________________________ (1) As of January 1, 2023, the Company’s share repurchases in excess of issuances are subject to a 1% excise tax enacted by the Inflation Reduction Act. The values in this column exclude the 1% excise tax incurred on share repurchases. Any excise tax incurred is recognized as part of the cost of the shares acquired in the Unaudited Condensed Consolidated Statement of Shareholders’ Equity (Deficit)
Schedule of Dividends Declared Per Common Share and Total Amounts Declared, Distributed and Deferred	The following table presents dividends declared per common share as well as total amounts declared, distributed and deferred for the periods indicated: Dividends (in thousands, except per share data) Per Share Declared Distributed (Released)/Deferred 2023 Three Months Ended March 31, $ 1.38 $ 111,986 $ 112,189 $ (203) Three Months Ended June 30, 1.38 110,383 110,147 236 Three Months Ended September 30, 1.38 109,847 109,408 439 Total $ 4.14 $ 332,216 $ 331,744 $ 472 2022 Three Months Ended March 31, $ 1.04 $ 87,280 $ 87,846 $ (566) Three Months Ended June 30, 1.04 84,593 84,189 404 Three Months Ended September 30, 1.25 101,354 100,849 505 Total $ 3.33 $ 273,227 $ 272,884 $ 343
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 during the nine months ended September 30, 2023: Common Stock Treasury Common Stock Issued Stock Outstanding Balance at December 31, 2022 133,623,005 (53,663,016) 79,959,989 Dividend payable/paid 24 — 24 Common stock issued 181,875 — 181,875 Shares withheld for tax withholding — (78,844) (78,844) Shares repurchased under stock repurchase programs — — — Shares issued to directors 58 (58) — Balance at March 31, 2023 133,804,962 (53,741,918) 80,063,044 Dividend payable/paid — — — Common stock issued 2,698 — 2,698 Shares withheld for tax withholding — (1,270) (1,270) Shares repurchased under stock repurchase programs — (941,360) (941,360) Shares issued to directors 5,306 (1,515) 3,791 Balance at June 30, 2023 133,812,966 (54,686,063) 79,126,903 Dividend payable/paid — — — Common stock issued 4,081 — 4,081 Shares withheld for tax withholding — (1,623) (1,623) Shares repurchased under stock repurchase programs — (38,263) (38,263) Shares issued to directors 56 (56) — Balance at September 30, 2023 133,817,103 (54,726,005) 79,091,098

SEGMENT INFORMATION (Tables)

SEGMENT INFORMATION (Tables)	9 Months Ended
	Sep. 30, 2023
Segment Reporting [Abstract]
Operating Revenues by Reportable Segment	The following table presents operating revenues by reportable segment for the periods indicated: Three Months Ended Nine Months Ended (in thousands) 2023 2022 2023 2022 Operating revenues Index $ 362,122 $ 322,240 $ 1,063,820 $ 973,948 Analytics 154,268 144,915 451,219 426,396 ESG and Climate 73,038 57,595 211,315 164,752 All Other - Private Assets 36,011 35,889 112,460 107,294 Total $ 625,439 $ 560,639 $ 1,838,814 $ 1,672,390
Segment Profitability and Reconciliation to Net Income	The following table presents segment profitability and a reconciliation to net income for the periods indicated: Three Months Ended Nine Months Ended (in thousands) 2023 2022 2023 2022 Index Adjusted EBITDA $ 277,672 $ 245,967 $ 808,424 $ 737,012 Analytics Adjusted EBITDA 71,781 67,634 197,710 181,484 ESG and Climate Adjusted EBITDA 25,440 15,910 66,114 42,334 All Other - Private Assets Adjusted EBITDA 11,396 11,450 36,076 29,819 Total operating segment profitability 386,289 340,961 1,108,324 990,649 Amortization of intangible assets 26,722 23,375 77,543 67,274 Depreciation and amortization of property, equipment and leasehold improvements 5,252 7,127 15,911 20,426 Acquisition-related integration and transaction costs (1) 1,006 928 1,006 4,059 Operating income 353,309 309,531 1,013,864 898,890 Other expense (income), net 35,653 40,327 112,678 120,711 Provision for income taxes 57,997 52,612 155,974 122,577 Net income $ 259,659 $ 216,592 $ 745,212 $ 655,602 ___________________________ (1) Represents transaction expenses and other costs directly related to the acquisition and integration of acquired businesses, including professional fees, severance expenses, regulatory filing fees and other costs, in each case that are incurred no later than 12 months after the close of the relevant acquisition.
Operating Revenues by Geographic Area	Operating revenues by geography are primarily based on the shipping address of the ultimate customer utilizing the product. The following table presents operating revenues by geographic area for the periods indicated: Three Months Ended Nine Months Ended (in thousands) 2023 2022 2023 2022 Operating revenues Americas: United States $ 246,089 $ 233,196 $ 740,939 $ 696,284 Other 28,243 24,450 83,353 70,559 Total Americas 274,332 257,646 824,292 766,843 Europe, the Middle East and Africa ("EMEA"): United Kingdom 105,036 88,681 296,388 264,854 Other 142,826 125,607 420,996 379,695 Total EMEA 247,862 214,288 717,384 644,549 Asia & Australia: Japan 24,956 21,784 75,258 67,817 Other 78,289 66,921 221,880 193,181 Total Asia & Australia 103,245 88,705 297,138 260,998 Total $ 625,439 $ 560,639 $ 1,838,814 $ 1,672,390
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 September 30, December 31, (in thousands) 2023 2022 Long-lived assets Americas: United States $ 201,309 $ 179,453 Other 11,974 11,971 Total Americas 213,283 191,424 EMEA: United Kingdom 18,346 19,674 Other 21,808 23,099 Total EMEA 40,154 42,773 Asia & Australia: Japan 1,268 652 Other 33,017 32,962 Total Asia & Australia 34,285 33,614 Total $ 287,722 $ 267,811

INTRODUCTION AND BASIS OF PRE_4

INTRODUCTION AND BASIS OF PRESENTATION - Narrative (Details) - Blackrock Inc - Customer Concentration Risk	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Revenue from Contract with Customer, Product and Service Benchmark
Introduction And Basis Of Presentation [Line Items]
Percentage of operating revenues accounted for by major customer	10.10%	10.50%
Revenue from Contract with Customer, Segment Benchmark | Index
Introduction And Basis Of Presentation [Line Items]
Percentage of operating revenues accounted for by major customer	17%	17.70%

INTRODUCTION AND BASIS OF PRE_5

INTRODUCTION AND BASIS OF PRESENTATION - Changes in Allowance for Doubtful Accounts (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2023	Dec. 31, 2022
Accounts receivable, net of allowances
Balance at beginning of year	$ 2,652	$ 2,337
Addition (reduction) to credit loss expense	1,300	910
Write-offs, net of recoveries	(922)	(595)
Balance at ending of year	$ 3,030	$ 2,652

REVENUE RECOGNITION - Disaggreg

REVENUE RECOGNITION - Disaggregation of Operating Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Disaggregation Of Revenue [Line Items]
Operating revenues	$ 625,439	$ 560,639	$ 1,838,814	$ 1,672,390
Index
Disaggregation Of Revenue [Line Items]
Operating revenues	362,122	322,240	1,063,820	973,948
Analytics
Disaggregation Of Revenue [Line Items]
Operating revenues	154,268	144,915	451,219	426,396
ESG and Climate
Disaggregation Of Revenue [Line Items]
Operating revenues	73,038	57,595	211,315	164,752
All Other - Private Assets
Disaggregation Of Revenue [Line Items]
Operating revenues	36,011	35,889	112,460	107,294
Recurring subscriptions
Disaggregation Of Revenue [Line Items]
Operating revenues	464,997	420,216	1,365,936	1,227,025
Recurring subscriptions | Index
Disaggregation Of Revenue [Line Items]
Operating revenues	206,453	185,531	603,845	539,740
Recurring subscriptions | Analytics
Disaggregation Of Revenue [Line Items]
Operating revenues	151,269	142,751	443,276	420,047
Recurring subscriptions | ESG and Climate
Disaggregation Of Revenue [Line Items]
Operating revenues	71,744	56,353	207,523	160,962
Recurring subscriptions | All Other - Private Assets
Disaggregation Of Revenue [Line Items]
Operating revenues	35,531	35,581	111,292	106,276
Asset-based fees
Disaggregation Of Revenue [Line Items]
Operating revenues	141,066	125,620	412,354	402,889
Asset-based fees | Index
Disaggregation Of Revenue [Line Items]
Operating revenues	141,066	125,620	412,354	402,889
Asset-based fees | Analytics
Disaggregation Of Revenue [Line Items]
Operating revenues	0	0	0	0
Asset-based fees | ESG and Climate
Disaggregation Of Revenue [Line Items]
Operating revenues	0	0	0	0
Asset-based fees | All Other - Private Assets
Disaggregation Of Revenue [Line Items]
Operating revenues	0	0	0	0
Non-recurring
Disaggregation Of Revenue [Line Items]
Operating revenues	19,376	14,803	60,524	42,476
Non-recurring | Index
Disaggregation Of Revenue [Line Items]
Operating revenues	14,603	11,089	47,621	31,319
Non-recurring | Analytics
Disaggregation Of Revenue [Line Items]
Operating revenues	2,999	2,164	7,943	6,349
Non-recurring | ESG and Climate
Disaggregation Of Revenue [Line Items]
Operating revenues	1,294	1,242	3,792	3,790
Non-recurring | All Other - Private Assets
Disaggregation Of Revenue [Line Items]
Operating revenues	$ 480	$ 308	$ 1,168	$ 1,018

REVENUE RECOGNITION - Schedule

REVENUE RECOGNITION - Schedule of Change in Accounts Receivable and Current Deferred Revenue (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Accounts receivable, net of allowances
Opening	$ 663,236	$ 664,511
Closing	603,266	525,360
Increase/(decrease)	(59,970)	(139,151)
Deferred revenue
Opening	882,886	824,912
Closing	837,479	735,710
Increase/(decrease)	$ (45,407)	$ (89,202)

REVENUE RECOGNITION - Narrative

REVENUE RECOGNITION - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Revenue Recognition [Line Items]
Revenue recognized during period included in deferred revenue	$ 171.8	$ 149.4	$ 798	$ 722
Disclosure of remaining performance policy			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
Revenue Recognition [Line Items]
Long-term deferred revenue	$ 28		$ 28		$ 29.4

REVENUE RECOGNITION - Schedul_2

REVENUE RECOGNITION - Schedule of Remaining Performance Obligations (Details) $ in Thousands	Sep. 30, 2023 USD ($)
Revenue Recognition [Line Items]
Remaining performance obligations	$ 1,432,900
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2023-10-01
Revenue Recognition [Line Items]
Remaining performance obligations	$ 695,027
Remaining performance, expected timing of satisfaction	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2024-10-01
Revenue Recognition [Line Items]
Remaining performance obligations	$ 420,056
Remaining performance, expected timing of satisfaction	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2025-10-01
Revenue Recognition [Line Items]
Remaining performance obligations	$ 182,375
Remaining performance, expected timing of satisfaction	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2026-10-01
Revenue Recognition [Line Items]
Remaining performance obligations	$ 135,442
Remaining performance, expected timing of satisfaction

EARNINGS PER COMMON SHARE (Deta

EARNINGS PER COMMON SHARE (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022
Earnings Per Share [Abstract]
Net income	$ 259,659	$ 246,825	$ 238,728	$ 216,592	$ 210,587	$ 228,423	$ 745,212	$ 655,602
Basic weighted average common shares outstanding (in shares)	79,116			80,500			79,580	81,001
Effect of dilutive securities:
PSUs, RSUs and PSOs (in shares)	384			374			379	480
Diluted weighted average common shares outstanding (in USD per share)	79,500			80,874			79,959	81,481
Earnings per common share:
Basic (in USD per share)	$ 3.28			$ 2.69			$ 9.36	$ 8.09
Diluted (in USD per share)	$ 3.27			$ 2.68			$ 9.32	$ 8.05

PROPERTY, EQUIPMENT AND LEASE_3

PROPERTY, EQUIPMENT AND LEASEHOLD IMPROVEMENTS, NET - Schedule of Property, Equipment and Leasehold Improvements, Net (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Property, Plant and Equipment [Abstract]
Computer & related equipment	$ 193,113	$ 181,710
Furniture & fixtures	15,643	14,078
Leasehold improvements	58,019	54,040
Work-in-process	860	2,373
Subtotal	267,635	252,201
Accumulated depreciation and amortization	(209,599)	(198,348)
Property, equipment and leasehold improvements, net	$ 58,036	$ 53,853

PROPERTY, EQUIPMENT AND LEASE_4

PROPERTY, EQUIPMENT AND LEASEHOLD IMPROVEMENTS, NET - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Property, Plant and Equipment [Abstract]
Depreciation and amortization of property, equipment and leasehold improvements	$ 5,252	$ 7,127	$ 15,911	$ 20,426

GOODWILL AND INTANGIBLE ASSET_3

GOODWILL AND INTANGIBLE ASSETS, NET - Schedule of Change to Company's Goodwill (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2023 USD ($)
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 2,229,670
Foreign exchange translation adjustment	719
Goodwill, ending balance	2,230,389
Index
Goodwill [Roll Forward]
Goodwill, beginning balance	1,201,622
Foreign exchange translation adjustment	445
Goodwill, ending balance	1,202,067
Analytics
Goodwill [Roll Forward]
Goodwill, beginning balance	290,976
Foreign exchange translation adjustment	0
Goodwill, ending balance	290,976
ESG and Climate
Goodwill [Roll Forward]
Goodwill, beginning balance	48,047
Foreign exchange translation adjustment	0
Goodwill, ending balance	48,047
All Other - Private Assets
Goodwill [Roll Forward]
Goodwill, beginning balance	689,025
Foreign exchange translation adjustment	274
Goodwill, ending balance	$ 689,299

GOODWILL AND INTANGIBLE ASSET_4

GOODWILL AND INTANGIBLE ASSETS, NET - Schedule of Amortization Expense Related to Intangible Assets by Category (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Finite Lived Intangible Assets [Line Items]
Amortization of intangible assets	$ 26,722	$ 23,375	$ 77,543	$ 67,274
Amortization expense of acquired intangible assets
Finite Lived Intangible Assets [Line Items]
Amortization of intangible assets	15,748	15,810	47,430	47,562
Amortization expense of internally developed capitalized software
Finite Lived Intangible Assets [Line Items]
Amortization of intangible assets	$ 10,974	$ 7,565	$ 30,113	$ 19,712

GOODWILL AND INTANGIBLE ASSET_5

GOODWILL AND INTANGIBLE ASSETS, NET - Schedule of Gross Carrying and Accumulated Amortization Amounts Related to Company's Intangible Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Acquired Finite Lived Intangible Assets [Line Items]
Gross intangible assets excluding foreign exchange translation adjustment	$ 1,390,939	$ 1,336,616
Foreign exchange translation adjustment	(12,478)	(13,214)
Total gross intangible assets	1,378,461	1,323,402
Accumulated amortization excluding foreign exchange translation adjustment	(846,415)	(769,356)
Foreign exchange translation adjustment	4,083	4,471
Total accumulated amortization	(842,332)	(764,885)
Net intangible assets excluding foreign exchange translation adjustment	544,524	567,260
Foreign exchange translation adjustment	(8,395)	(8,743)
Total net intangible assets	536,129	558,517
Customer relationships
Acquired Finite Lived Intangible Assets [Line Items]
Gross intangible assets excluding foreign exchange translation adjustment	532,500	532,500
Accumulated amortization excluding foreign exchange translation adjustment	(331,275)	(308,437)
Net intangible assets excluding foreign exchange translation adjustment	201,225	224,063
Proprietary data
Acquired Finite Lived Intangible Assets [Line Items]
Gross intangible assets excluding foreign exchange translation adjustment	220,778	220,778
Accumulated amortization excluding foreign exchange translation adjustment	(56,125)	(41,783)
Net intangible assets excluding foreign exchange translation adjustment	164,653	178,995
Acquired technology and software
Acquired Finite Lived Intangible Assets [Line Items]
Gross intangible assets excluding foreign exchange translation adjustment	209,220	209,220
Accumulated amortization excluding foreign exchange translation adjustment	(182,920)	(179,833)
Net intangible assets excluding foreign exchange translation adjustment	26,300	29,387
Trademarks
Acquired Finite Lived Intangible Assets [Line Items]
Gross intangible assets excluding foreign exchange translation adjustment	208,190	208,190
Accumulated amortization excluding foreign exchange translation adjustment	(169,207)	(162,044)
Net intangible assets excluding foreign exchange translation adjustment	38,983	46,146
Internally developed capitalized software
Acquired Finite Lived Intangible Assets [Line Items]
Gross intangible assets excluding foreign exchange translation adjustment	220,251	165,928
Accumulated amortization excluding foreign exchange translation adjustment	(106,888)	(77,259)
Net intangible assets excluding foreign exchange translation adjustment	$ 113,363	$ 88,670

GOODWILL AND INTANGIBLE ASSET_6

GOODWILL AND INTANGIBLE ASSETS, NET - Estimated Future Amortization Expense (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract]
Remainder of 2023	$ 28,555
2024	109,796
2025	84,575
2026	49,965
2027	36,755
Thereafter	226,483
Total net intangible assets	$ 536,129	$ 558,517

COMMITMENTS AND CONTINGENCIES -

COMMITMENTS AND CONTINGENCIES - Narrative (Details) - USD ($)		9 Months Ended
	Jun. 09, 2022	Sep. 30, 2023
Schedule Of Commitments And Contingencies [Line Items]
Debt instrument principal amount		$ 4,541,250,000
Deferred financing fees and premium remain unamortized		34,200,000
Prepaid and Other Assets
Schedule Of Commitments And Contingencies [Line Items]
Deferred financing fees and premium remain unamortized		500,000
Other Non-Current Assets
Schedule Of Commitments And Contingencies [Line Items]
Deferred financing fees and premium remain unamortized		1,200,000
Long-term Debt
Schedule Of Commitments And Contingencies [Line Items]
Deferred financing fees and premium remain unamortized		32,500,000
Variable rate Tranche A Term Loans due 2027
Schedule Of Commitments And Contingencies [Line Items]
Debt instrument principal amount		$ 341,250,000
Debt instrument maturity	Feb. 16, 2027	Feb. 16, 2027
Interest rate on TLA Facility		7.42%
Variable rate Tranche A Term Loans due 2027 | Minimum | Secured Overnight Financing Rate (SOFR)
Schedule Of Commitments And Contingencies [Line Items]
Debt instrument, basis spread on variable rate	1.50%
Variable rate Tranche A Term Loans due 2027 | Minimum | Base Rate Loans
Schedule Of Commitments And Contingencies [Line Items]
Debt instrument, basis spread on variable rate	0.50%
Variable rate Tranche A Term Loans due 2027 | Maximum | Secured Overnight Financing Rate (SOFR)
Schedule Of Commitments And Contingencies [Line Items]
Debt instrument, basis spread on variable rate	2%
Variable rate Tranche A Term Loans due 2027 | Maximum | Base Rate Loans
Schedule Of Commitments And Contingencies [Line Items]
Debt instrument, basis spread on variable rate	1%
Revolving Credit Facility | Revolving Loan Commitments
Schedule Of Commitments And Contingencies [Line Items]
Line of credit facility, maximum borrowing capacity	$ 500,000,000
Senior Unsecured Notes
Schedule Of Commitments And Contingencies [Line Items]
Debt instrument principal amount		$ 4,200,000,000
TLA Facility
Schedule Of Commitments And Contingencies [Line Items]
Debt instrument principal amount		$ 341,300,000

COMMITMENTS AND CONTINGENCIES_2

COMMITMENTS AND CONTINGENCIES - Schedule of Senior Unsecured Notes (Details) - USD ($)		9 Months Ended
	Jun. 09, 2022	Sep. 30, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Principal Amount Outstanding		$ 4,541,250,000
Carrying Value		4,508,781,000	$ 4,511,947,000
Fair Value		3,864,726,000	3,850,132,000
Current portion of long-term debt		$ 8,719,000	8,713,000
4.000% senior unsecured notes due 2029
Debt Instrument [Line Items]
Debt instrument interest rate		400%
Maturity Date		Nov. 15, 2029
Principal Amount Outstanding		$ 1,000,000,000
Carrying Value		993,364,000	992,546,000
Fair Value		$ 872,670,000	876,240,000
3.625% senior unsecured notes due 2030
Debt Instrument [Line Items]
Debt instrument interest rate		362.50%
Maturity Date		Sep. 01, 2030
Principal Amount Outstanding		$ 900,000,000
Carrying Value		895,421,000	894,925,000
Fair Value		$ 755,433,000	751,113,000
3.875% senior unsecured notes due 2031
Debt Instrument [Line Items]
Debt instrument interest rate		387.50%
Maturity Date		Feb. 15, 2031
Principal Amount Outstanding		$ 1,000,000,000
Carrying Value		991,887,000	991,067,000
Fair Value		$ 867,600,000	833,130,000
3.625% senior unsecured notes due 2031
Debt Instrument [Line Items]
Debt instrument interest rate		362.50%
Maturity Date		Nov. 01, 2031
Principal Amount Outstanding		$ 600,000,000
Carrying Value		594,688,000	594,195,000
Fair Value		$ 491,928,000	500,880,000
3.250% senior unsecured notes due 2033
Debt Instrument [Line Items]
Debt instrument interest rate		325%
Maturity Date		Aug. 15, 2033
Principal Amount Outstanding		$ 700,000,000
Carrying Value		693,364,000	692,862,000
Fair Value		$ 537,551,000	542,696,000
Variable rate Tranche A Term Loans due 2027
Debt Instrument [Line Items]
Maturity Date	Feb. 16, 2027	Feb. 16, 2027
Principal Amount Outstanding		$ 341,250,000
Carrying Value		340,057,000	346,352,000
Fair Value		$ 339,544,000	$ 346,073,000

COMMITMENTS AND CONTINGENCIES_3

COMMITMENTS AND CONTINGENCIES - Schedule of Maturities of Long-Term Debt (Details)	Sep. 30, 2023 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Remainder of 2023	$ 2,187,000
2024	10,938,000
2025	19,687,000
2026	26,250,000
2027	282,188,000
Thereafter	4,200,000,000
Total debt	$ 4,541,250,000

COMMITMENTS AND CONTINGENCIES_4

COMMITMENTS AND CONTINGENCIES - Schedule of Interest Payments Due Attributable to Outstanding Indebtedness (Details)	9 Months Ended
	Sep. 30, 2023
4.000% senior unsecured notes due 2029
Debt Instrument [Line Items]
Debt instrument interest rate	400%
Interest payment frequency	Semi-Annual
First interest payment date	--05-15
3.625% senior unsecured notes due 2030
Debt Instrument [Line Items]
Debt instrument interest rate	362.50%
Interest payment frequency	Semi-Annual
First interest payment date	--03-01
3.875% senior unsecured notes due 2031
Debt Instrument [Line Items]
Debt instrument interest rate	387.50%
Interest payment frequency	Semi-Annual
First interest payment date	--06-01
3.625% senior unsecured notes due 2031
Debt Instrument [Line Items]
Debt instrument interest rate	362.50%
Interest payment frequency	Semi-Annual
First interest payment date	--05-01
3.250% senior unsecured notes due 2033
Debt Instrument [Line Items]
Debt instrument interest rate	325%
Interest payment frequency	Semi-Annual
First interest payment date	--02-15
Variable rate Tranche A Term Loans due 2027
Debt Instrument [Line Items]
Interest payment frequency	Variable
First interest payment date	--07-11

LEASES - Lease, Cost (Details)

LEASES - Lease, Cost (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Leases [Abstract]
Operating lease expenses	$ 7,278	$ 7,308	$ 21,570	$ 22,439
Variable lease costs	1,022	808	2,843	2,411
Short-term lease costs	108	123	547	333
Sublease income	(1,276)	(1,251)	(3,827)	(3,354)
Total lease costs	$ 7,132	$ 6,988	$ 21,133	$ 21,829

LEASES - Summary of Maturities

LEASES - Summary of Maturities of Operating Lease Liability (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Maturity of Lease Liabilities
Remainder of 2023	$ 6,098
2024	27,182
2025	24,202
2026	22,408
2027	17,691
Thereafter	67,096
Total lease payments	164,677
Less: Interest	(20,632)
Present value of lease liabilities	144,045
Other accrued liabilities	22,104
Long-term operating lease liabilities	$ 121,941	$ 131,575

LEASES - Summary of Weighted-Av

LEASES - Summary of Weighted-Average Remaining Lease Term and Discount Rate Under Operating Leases (Details)	Sep. 30, 2023	Dec. 31, 2022
Leases [Abstract]
Weighted-average remaining lease term (years)	7 years 3 months 18 days	7 years 10 months 9 days
Weighted-average discount rate	3.58%	3.40%

LEASES - Summary of Other Infor

LEASES - Summary of Other Information Under Operating Lease (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Leases [Abstract]
Operating cash flows used for operating leases	$ 22,918	$ 22,025
Right of use assets obtained in exchange for new operating lease liabilities	$ 8,896	$ 14,929

SHAREHOLDERS' EQUITY (DEFICIT_2

SHAREHOLDERS' EQUITY (DEFICIT) - Narrative (Details) - USD ($)	Sep. 30, 2023	Jul. 28, 2022
2022 Repurchase Program
Equity, Class of Treasury Stock [Line Items]
Repurchase program authorizing the purchase of shares		$ 1,000,000,000
Stock repurchase program, remaining authorized repurchase amount	$ 845,700,000	1,539,100,000
2020 Repurchase Program
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program, remaining authorized repurchase amount		$ 539,100,000

SHAREHOLDERS' EQUITY (DEFICIT_3

SHAREHOLDERS' EQUITY (DEFICIT) - Schedule of Company's Common Stock Repurchases Made on Open Market (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022
Equity, Class of Treasury Stock [Line Items]
Dollar Value of Shares Repurchased	$ 18,039	$ 444,655	$ 0	$ 165,044	$ 276,994	$ 772,657
Excise tax percentage							1%
Open Market Purchases of Common Stock
Equity, Class of Treasury Stock [Line Items]
Average Price Paid Per Share (USD per Share)							$ 468.26	$ 473.26
Total Number of Shares Repurchased (in shares)							980	2,567
Dollar Value of Shares Repurchased							$ 458,721	$ 1,214,695

SHAREHOLDERS' EQUITY (DEFICIT_4

SHAREHOLDERS' EQUITY (DEFICIT) - Schedule of Dividends Declared Per Common Share and Total Amounts Declared, Distributed and Deferred (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022
Equity [Abstract]
Dividend declared per common share (in USD per share)	$ 1.38	$ 1.38	$ 1.38	$ 1.25	$ 1.04	$ 1.04	$ 4.14	$ 3.33
Cash dividends declared	$ 109,847	$ 110,383	$ 111,986	$ 101,354	$ 84,593	$ 87,280	$ 332,216	$ 273,227
Cash dividends distributed	109,408	110,147	112,189	100,849	84,189	87,846	331,744	272,884
Cash dividends (released)/deferred	$ 439	$ 236	$ (203)	$ 505	$ 404	$ (566)	$ 472	$ 343

SHAREHOLDERS' EQUITY (DEFICIT_5

SHAREHOLDERS' EQUITY (DEFICIT) - Summary of Activity Related to Shares of Common Stock Issued and Repurchased (Details) - shares	3 Months Ended			9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2023
Movement In Equity Shares [Roll Forward]
Beginning balance (in shares)			133,623,005	133,623,005
Beginning balance (in shares)			(53,663,016)	(53,663,016)
Beginning balance (in shares)			79,959,989	79,959,989
Ending balance (in shares)	133,817,103			133,817,103
Ending balance (in shares)	(54,726,005)			(54,726,005)
Ending balance (in shares)	79,091,098			79,091,098
Common Stock Issued
Movement In Equity Shares [Roll Forward]
Beginning balance (in shares)	133,812,966	133,804,962	133,623,005	133,623,005
Dividend payable/paid (in shares)			24
Common stock issued (in shares)	4,081	2,698	181,875
Shares issued to directors (in shares)	56	5,306	58
Ending balance (in shares)	133,817,103	133,812,966	133,804,962	133,817,103
Treasury Stock
Movement In Equity Shares [Roll Forward]
Beginning balance (in shares)	(54,686,063)	(53,741,918)	(53,663,016)	(53,663,016)
Shares withheld for tax withholding (in shares)	(1,623)	(1,270)	(78,844)
Shares repurchased under stock repurchase programs (in shares)	(38,263)	(941,360)
Shares issued to directors (in shares)	56	1,515	58
Ending balance (in shares)	(54,726,005)	(54,686,063)	(53,741,918)	(54,726,005)
Common Stock Outstanding
Movement In Equity Shares [Roll Forward]
Beginning balance (in shares)	79,126,903	80,063,044	79,959,989	79,959,989
Dividend payable/paid (in shares)			24
Common stock issued (in shares)	4,081	2,698	181,875
Shares withheld for tax withholding (in shares)	(1,623)	(1,270)	(78,844)
Shares repurchased under stock repurchase programs (in shares)	(38,263)	(941,360)
Shares issued to directors (in shares)		3,791
Ending balance (in shares)	79,091,098	79,126,903	80,063,044	79,091,098

INCOME TAXES (Details)

INCOME TAXES (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Income Tax Disclosure [Abstract]
Provision for income taxes	$ 57,997	$ 52,612	$ 155,974	$ 122,577
Effective tax rate			17.30%	15.80%
Amounts effect on effective tax rate	19,800	$ 28,200	$ 19,800	$ 28,200
Amount of excess tax benefits recognized on share-based compensation vested			11,400	$ 28,400
Tax benefit from other prior year earnings			8,400
Decrease in unrecognized tax benefits is reasonably possible	22,900		22,900
Unrecognized tax benefits, increase resulting from settlements with taxing authorities	$ 400
Unrecognized tax benefits, decrease resulting from settlements with taxing authorities			$ 4,400

SEGMENT INFORMATION - Narrative

SEGMENT INFORMATION - Narrative (Details)	9 Months Ended
	Sep. 30, 2023 segment
Segment Reporting [Abstract]
Number of operating segments	5
Number of reportable segments	4

SEGMENT INFORMATION - Operating

SEGMENT INFORMATION - Operating Revenues by Reportable Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating revenues	$ 625,439	$ 560,639	$ 1,838,814	$ 1,672,390
Index
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating revenues	362,122	322,240	1,063,820	973,948
Analytics
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating revenues	154,268	144,915	451,219	426,396
ESG and Climate
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating revenues	73,038	57,595	211,315	164,752
All Other - Private Assets
Segment Reporting, Revenue Reconciling Item [Line Items]
Operating revenues	$ 36,011	$ 35,889	$ 112,460	$ 107,294

SEGMENT INFORMATION - Segment P

SEGMENT INFORMATION - Segment Profitability and Reconciliation to Net Income (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022
Segment Reporting Information [Line Items]
Adjusted EBITDA	$ 386,289			$ 340,961			$ 1,108,324	$ 990,649
Amortization of intangible assets	26,722			23,375			77,543	67,274
Depreciation and amortization of property, equipment and leasehold improvements	5,252			7,127			15,911	20,426
Acquisition-related integration and transaction costs	1,006			928			1,006	4,059
Operating income	353,309			309,531			1,013,864	898,890
Other expense (income), net	35,653			40,327			112,678	120,711
Provision for income taxes	57,997			52,612			155,974	122,577
Net income	259,659	$ 246,825	$ 238,728	216,592	$ 210,587	$ 228,423	745,212	655,602
Index
Segment Reporting Information [Line Items]
Adjusted EBITDA	277,672			245,967			808,424	737,012
Analytics
Segment Reporting Information [Line Items]
Adjusted EBITDA	71,781			67,634			197,710	181,484
ESG and Climate
Segment Reporting Information [Line Items]
Adjusted EBITDA	25,440			15,910			66,114	42,334
All Other - Private Assets
Segment Reporting Information [Line Items]
Adjusted EBITDA	$ 11,396			$ 11,450			$ 36,076	$ 29,819

SEGMENT INFORMATION - Operati_2

SEGMENT INFORMATION - Operating Revenues by Geographic Area (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Revenues from External Customers and Long-Lived Assets [Line Items]
Operating revenues	$ 625,439	$ 560,639	$ 1,838,814	$ 1,672,390
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Operating revenues	246,089	233,196	740,939	696,284
Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Operating revenues	28,243	24,450	83,353	70,559
Total Americas
Revenues from External Customers and Long-Lived Assets [Line Items]
Operating revenues	274,332	257,646	824,292	766,843
United Kingdom
Revenues from External Customers and Long-Lived Assets [Line Items]
Operating revenues	105,036	88,681	296,388	264,854
Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Operating revenues	142,826	125,607	420,996	379,695
Total EMEA
Revenues from External Customers and Long-Lived Assets [Line Items]
Operating revenues	247,862	214,288	717,384	644,549
Japan
Revenues from External Customers and Long-Lived Assets [Line Items]
Operating revenues	24,956	21,784	75,258	67,817
Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Operating revenues	78,289	66,921	221,880	193,181
Total Asia & Australia
Revenues from External Customers and Long-Lived Assets [Line Items]
Operating revenues	$ 103,245	$ 88,705	$ 297,138	$ 260,998

SEGMENT INFORMATION - Long-Live

SEGMENT INFORMATION - Long-Lived Assets by Geographic Area (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 287,722	$ 267,811
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	201,309	179,453
Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	11,974	11,971
Total Americas
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	213,283	191,424
United Kingdom
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	18,346	19,674
Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	21,808	23,099
Total EMEA
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	40,154	42,773
Japan
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	1,268	652
Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	33,017	32,962
Total Asia & Australia
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 34,285	$ 33,614

SUBSEQUENT EVENTS (Details)

SUBSEQUENT EVENTS (Details) - USD ($) $ / shares in Units, $ in Millions			3 Months Ended						9 Months Ended
	Oct. 30, 2023	Oct. 02, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022
Subsequent Event [Line Items]
Dividend declared per common share (in USD per share)			$ 1.38	$ 1.38	$ 1.38	$ 1.25	$ 1.04	$ 1.04	$ 4.14	$ 3.33
Subsequent Event
Subsequent Event [Line Items]
Dividend declared per common share (in USD per share)	$ 1.38
Subsequent Event | Burgiss Group Limited Liability Company
Subsequent Event [Line Items]
Business acquisition, percentage of voting interests acquired		66.40%
Payments to acquire businesses, gross		$ 696.8
Existing interest in acquiree, percentage		33.60%
Fair value at acquisition date		$ 353.2
Pre-tax gain on remeasurement		$ 140