Moody's (MCO) 10-K 14 Feb 25 2024 FY Annual report Financial data

Cover Page

Cover Page - USD ($) shares in Millions, $ in Billions	12 Months Ended
	Dec. 31, 2024	Jan. 31, 2025	Jun. 30, 2024
Entity Information [Line Items]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2024
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	1-14037
Entity Registrant Name	MOODY’S CORPORATION
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	13-3998945
Entity Address, Address Line One	7 World Trade Center at 250 Greenwich Street
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	553-0300
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
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
ICFR Auditor Attestation Flag	true
Document Financial Statement Error Correction [Flag]	false
Entity Shell Company	false
Entity Public Float			$ 77
Entity Common Stock, Shares Outstanding (in shares)		180
Documents Incorporated by Reference	Portions of the Registrant’s definitive proxy statement for use in connection with its annual meeting of stockholders scheduled to be held on April 15, 2025, are incorporated by reference into Part III of this Form 10-K.
Entity Central Index Key	0001059556
Document Fiscal Period Focus	FY
Amendment Flag	false
Document Fiscal Year Focus	2024
Common Stock, par value $0.01 per share
Entity Information [Line Items]
Title of 12(b) Security	Common Stock, par value $0.01 per share
Trading Symbol	MCO
Security Exchange Name	NYSE
1.75% 2015 Senior Notes, due 2027
Entity Information [Line Items]
Title of 12(b) Security	1.75% Senior Notes Due 2027
Trading Symbol	MCO 27
Security Exchange Name	NYSE
0.950% 2019 Senior Notes, due 2030
Entity Information [Line Items]
Title of 12(b) Security	0.950% Senior Notes Due 2030
Trading Symbol	MCO 30
Security Exchange Name	NYSE

Audit Information

Audit Information	12 Months Ended
	Dec. 31, 2024
Audit Information [Abstract]
Auditor Name	KPMG LLP
Auditor Location	New York, NY
Auditor Firm ID	185

CONSOLIDATED STATEMENTS OF OPER

CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income Statement [Abstract]
Revenue	$ 7,088	$ 5,916	$ 5,468
Expenses
Operating	1,945	1,687	1,613
Selling, general and administrative	1,735	1,632	1,527
Depreciation and amortization	431	373	331
Restructuring	59	87	114
Charges related to asset abandonment	43	0	0
Total expenses	4,213	3,779	3,585
Operating income	2,875	2,137	1,883
Non-operating (expense) income, net
Interest expense, net	(237)	(251)	(231)
Other non-operating income, net	61	49	38
Gain on extinguishment of debt	0	0	70
Non-operating (expense) income, net	(176)	(202)	(123)
Income before provision for income taxes	2,699	1,935	1,760
Provision for income taxes	640	327	386
Net income	2,059	1,608	1,374
Less: Net income attributable to noncontrolling interests	1	1	0
Net income attributable to Moody’s	$ 2,058	$ 1,607	$ 1,374
Earnings per share
Basic (in USD per share)	$ 11.32	$ 8.77	$ 7.47
Diluted (in USD per share)	$ 11.26	$ 8.73	$ 7.44
Weighted average shares outstanding
Basic (in shares)	181.8	183.2	183.9
Diluted (in shares)	182.7	184	184.7

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 2,059	$ 1,608	$ 1,374
Foreign Currency Adjustments:
Foreign currency translation adjustment - Pre Tax	(309)	213	(439)
Foreign currency translation adjustment - Tax	(3)	(1)	2
Foreign currency translation adjustment - Net of Tax	(312)	212	(437)
Foreign currency translation adjustments - reclassification of losses included in net income - Pre Tax	0	0	20
Foreign currency translation adjustments - reclassification of losses included in net income - Tax	0	0	0
Foreign currency translation adjustments - reclassification of losses included in net income - Net of Tax	0	0	20
Net (losses) gains on net investment hedges - Pre Tax	299	(177)	219
Net (losses) gains on net investment hedges - Tax	(77)	45	(55)
Net (losses) gains on net investment hedges - Net of Tax	222	(132)	164
Cash Flow Hedges:
Reclassification of losses included in net income - Pre Tax	3	2	2
Reclassification of losses included in net income - Tax	(1)	(1)	0
Reclassification of losses included in net income - Net of Tax	2	1	2
Pension and Other Retirement Benefits:
Amortization of actuarial losses/prior service costs and settlement charge included in net income - Pre Tax	(2)	(3)	3
Amortization of actuarial losses and prior service costs and settlement charge included in net income - Tax	0	0	(1)
Amortization of actuarial losses and prior service costs and settlement charge included in net income - Net of Tax	(2)	(3)	2
Net actuarial (losses) gains and prior service costs - Pre Tax	25	(8)	(1)
Net actuarial (losses) gains and prior service costs - Tax	(6)	2	1
Net actuarial (losses) gains and prior service costs - Net of Tax	19	(6)	0
Total other comprehensive (loss) income - Pre Tax	16	27	(196)
Total other comprehensive (loss)income - Tax	(87)	45	(53)
Total Other Comprehensive Income (Loss)	(71)	72	(249)
Comprehensive Income	1,988	1,680	1,125
Less: comprehensive loss attributable to noncontrolling interests	0	(4)	(16)
Comprehensive Income Attributable to Moody’s	$ 1,988	$ 1,684	$ 1,141

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 2,408	$ 2,130
Short-term investments	566	63
Accounts receivable, net of allowances for credit losses of $32 in 2024 and $35 in 2023	1,801	1,659
Other current assets	515	489
Total current assets	5,290	4,341
Property and equipment, net of accumulated depreciation of $1,453 in 2024 and $1,272 in 2023	656	603
Operating lease right-of-use assets	216	277
Goodwill	5,994	5,956
Intangible assets, net	1,890	2,049
Deferred tax assets, net	293	258
Other assets	1,166	1,138
Total assets	15,505	14,622
Current liabilities:
Accounts payable and accrued liabilities	1,344	1,076
Current portion of operating lease liabilities	102	108
Current portion of long-term debt	697	0
Deferred revenue	1,454	1,316
Total current liabilities	3,597	2,500
Non-current portion of deferred revenue	57	65
Total long-term debt	6,731	7,001
Deferred tax liabilities, net	449	402
Uncertain tax positions	211	196
Operating lease liabilities	216	306
Other liabilities	517	676
Total liabilities	11,778	11,146
Contingencies
Shareholders’ equity:
Preferred stock, par value $0.01 per share; 10,000,000 shares authorized; no shares issued and outstanding	0	0
Capital surplus	1,451	1,228
Retained earnings	16,071	14,659
Treasury stock, at cost; 162,593,213 and 160,430,754 shares of common stock at December 31, 2024 and December 31, 2023, respectively	(13,322)	(12,005)
Accumulated other comprehensive loss	(638)	(567)
Total Moody’s shareholders’ equity	3,565	3,318
Noncontrolling interests	162	158
Total shareholders’ equity	3,727	3,476
Total liabilities and shareholders’ equity	15,505	14,622
Series Common Stock
Shareholders’ equity:
Common stock	0	0
Common Stock
Shareholders’ equity:
Common stock	$ 3	$ 3

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Accounts receivable, allowances	$ 32	$ 35
Property and equipment, accumulated depreciation	$ 1,453	$ 1,272
Preferred stock, par value (in usd per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	10,000,000	10,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Treasury stock, shares (in shares)	162,593,213	160,430,754
Series Common Stock
Common stock, par value (in usd per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	10,000,000	10,000,000
Common stock, shares issued (in shares)	0	0
Common stock, shares outstanding (in shares)	0	0
Common Stock
Common stock, par value (in usd per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	1,000,000,000	1,000,000,000
Common stock, shares issued (in shares)	342,902,272	342,902,272

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Cash flows from operating activities
Net income	$ 2,059	$ 1,608	$ 1,374
Reconciliation of net income to net cash provided by operating activities:
Depreciation and amortization	431	373	331
Stock-based compensation	220	193	169
Deferred income taxes	(62)	(38)	48
Non-cash restructuring and asset impairment/abandonment-related charges	32	35	29
Provision for credit losses on accounts receivable	15	22	25
FX translation losses reclassified to net income	0	0	20
Gain on extinguishment of debt	0	0	(70)
Gain on previously held/sold investments in non-consolidated affiliates	(7)	(4)	0
Changes in assets and liabilities:
Accounts receivable	(187)	(12)	9
Other current assets	(36)	119	(223)
Other assets	(17)	(69)	(48)
Lease obligations	(33)	(26)	(19)
Accounts payable and accrued liabilities	225	76	(161)
Deferred revenue	154	24	20
Unrecognized tax positions and other non-current tax liabilities	18	(129)	(33)
Other liabilities	26	(21)	3
Net cash provided by operating activities	2,838	2,151	1,474
Cash flows from investing activities
Capital additions	(317)	(271)	(283)
Purchases of investments	(651)	(143)	(246)
Sales and maturities of investments	135	162	216
Purchases of investments in non-consolidated affiliates	(4)	(5)	(74)
Sales of/distributions from investments in non-consolidated affiliates	2	13	2
Cash paid for acquisitions, net of cash acquired	(221)	(3)	(97)
Receipts from settlements of net investment hedges	0	0	220
Net cash used in investing activities	(1,056)	(247)	(262)
Cash flows from financing activities
Issuance of notes	496	0	988
Repayment of notes	0	(500)	(626)
Proceeds from stock-based compensation plans	73	50	26
Repurchase of shares related to stock-based compensation	(91)	(71)	(87)
Treasury shares	(1,292)	(490)	(983)
Dividends	(620)	(564)	(515)
Dividends to noncontrolling interests	(7)	(9)	(1)
Debt issuance costs, extinguishment costs and related fees	(5)	0	(10)
Net cash used in financing activities	(1,446)	(1,584)	(1,208)
Effect of exchange rate changes on cash and cash equivalents	(58)	41	(46)
Increase (decrease) in cash and cash equivalents	278	361	(42)
Cash and cash equivalents, beginning of period	2,130	1,769	1,811
Cash and cash equivalents, end of period	$ 2,408	$ 2,130	$ 1,769

CONSOLIDATED STATEMENT OF SHARE

CONSOLIDATED STATEMENT OF SHAREHOLDERS' EQUITY - USD ($) $ in Millions		Total	Total Moody’s Shareholders’ Equity	Common Stock	Capital Surplus	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Loss	Non- Controlling Interests
Common stock, shares, issued, beginning balance (in shares) at Dec. 31, 2021				342,900,000
Treasury stock, common, shares, beginning balance (in shares) at Dec. 31, 2021							(157,300,000)
Beginning Balance at Dec. 31, 2021		$ 2,916	$ 2,727	$ 3	$ 885	$ 12,762	$ (10,513)	$ (410)	$ 189
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		1,374	1,374			1,374			0
Dividends		(521)	(518)			(518)			(3)
Stock-based compensation		169	169		169
Shares issued for stock-based compensation plans at average cost, net		(61)	(61)		(32)		$ (29)
Shares issued for stock-based compensation plans at average cost, net (in shares)							600,000
Shares issued as consideration to acquire kompany	[1]	44	44		35		$ 9
Shares issued as consideration to acquire kompany (in shares)	[1]						100,000
Treasury shares repurchased		(983)	(983)		(3)		$ (980)
Treasury shares repurchased (in shares)							(3,100,000)
Currency translation adjustment, net of net investment hedge activity		(253)	(237)					(237)	(16)
Net actuarial gains (losses) and prior service cost		0
Amortization of prior service costs/ actuarial losses and settlement charge		2	2					2
Net realized and unrealized gain (loss) on cash flow hedges		2	2					2
Common stock, shares, issued, ending balance (in shares) at Dec. 31, 2022				342,900,000
Treasury stock, common, shares, ending balance (in shares) at Dec. 31, 2022							(159,700,000)
Ending Balance at Dec. 31, 2022		2,689	2,519	$ 3	1,054	13,618	$ (11,513)	(643)	170
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		1,608	1,607			1,607			1
Dividends		(575)	(566)			(566)			(9)
Stock-based compensation		193	193		193
Shares issued for stock-based compensation plans at average cost, net		(19)	(19)		(19)		$ 0
Shares issued for stock-based compensation plans at average cost, net (in shares)							800,000
Treasury shares repurchased		(492)	(492)		0		$ (492)
Treasury shares repurchased (in shares)							(1,500,000)
Currency translation adjustment, net of net investment hedge activity		80	84					84	(4)
Net actuarial gains (losses) and prior service cost		(6)	(6)					(6)
Amortization of prior service costs/ actuarial losses and settlement charge		(3)	(3)					(3)
Net realized and unrealized gain (loss) on cash flow hedges		$ 1	1					1
Common stock, shares, issued, ending balance (in shares) at Dec. 31, 2023				342,900,000
Treasury stock, common, shares, ending balance (in shares) at Dec. 31, 2023		(160,430,754)					(160,400,000)
Ending Balance at Dec. 31, 2023		$ 3,476	3,318	$ 3	1,228	14,659	$ (12,005)	(567)	158
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		2,059	2,058			2,058			1
Dividends		(653)	(646)			(646)			(7)
Stock-based compensation		225	225		225
Shares issued for stock-based compensation plans at average cost, net		(18)	(18)		(2)		$ (16)
Shares issued for stock-based compensation plans at average cost, net (in shares)							700,000
Noncontrolling Interest, Increase from Business Combination		10	0						10
Treasury shares repurchased		(1,301)	(1,301)		0		$ (1,301)
Treasury shares repurchased (in shares)							(2,900,000)
Currency translation adjustment, net of net investment hedge activity		(90)	(90)					(90)	0
Net actuarial gains (losses) and prior service cost		19	19					19
Amortization of prior service costs/ actuarial losses and settlement charge		(2)	(2)					(2)
Net realized and unrealized gain (loss) on cash flow hedges		$ 2	2					2
Common stock, shares, issued, ending balance (in shares) at Dec. 31, 2024				342,900,000
Treasury stock, common, shares, ending balance (in shares) at Dec. 31, 2024		(162,593,213)					(162,600,000)
Ending Balance at Dec. 31, 2024		$ 3,727	$ 3,565	$ 3	$ 1,451	$ 16,071	$ (13,322)	$ (638)	$ 162
[1]Represents a non-cash investing activity relating to the issuance of common stock to fund a portion of the purchase price for kompany.

CONSOLIDATED STATEMENT OF SHA_2

CONSOLIDATED STATEMENT OF SHAREHOLDERS' EQUITY (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Statement of Stockholders' Equity [Abstract]
Dividends declared per share attributable to Moody's common shareholders (in USD per share)	$ 3.40	$ 3.08	$ 2.80
Currency translation adjustment, tax	$ (80)	$ 44	$ (53)
Amortization of actuarial losses and prior service costs included in net income, tax	0	0	1
Net actuarial gains (losses) and prior service cost, tax	6	(2)	$ (1)
Amortization of losses on cash flow hedges	$ 1	$ 1

DESCRIPTION OF BUSINESS AND BAS

DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION	12 Months Ended
	Dec. 31, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION	DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION Moody’s is a global provider of integrated perspectives on risk that empowers organizations and investors to make better decisions. Moody’s reports in two reportable segments: MA and MIS. MA is a global provider of: i) data and information; ii) research and insights; and iii) decision solutions, which help companies make better and faster decisions. MA leverages its industry expertise across multiple risks such as credit, market, financial crime, supply chain, catastrophe and climate to deliver integrated risk assessment solutions that enable business leaders to identify, measure and manage the implications of interrelated risks and opportunities. MIS publishes credit ratings and provides assessment services on a wide range of debt obligations, programs and facilities, and the entities that issue such obligations in markets worldwide, including various corporate, financial institution and governmental obligations, and structured finance securities. Certain reclassifications have been made to prior period amounts to conform to the current presentation. Adoption of New Accounting Standards in 2024 In November 2023, the FASB issued ASU 2023-07, "Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures" ("ASU No. 2023-07"), which expands segment disclosure requirements for public entities. ASU No. 2023-07 requires entities to disclose significant segment expenses by reportable segment if they are regularly provided to the CODM and included in each reported measure of segment profit or loss. In addition, this ASU permits entities to disclose more than one measure of segment profit or loss used by the CODM. Additionally, disclosure of the CODM’s title and position will be required on an annual basis, as well as an explanation of how the CODM uses the reported measure(s). Furthermore, all existing annual disclosures about segment profit or loss and assets must be provided on an interim basis in addition to disclosure of significant segment expenses and other segment items. This ASU is effective for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024, and requires retrospective application to all prior periods presented in the financial statements. The Company adopted this ASU retrospectively for all periods presented with the new required disclosures presented in Note 20. Reclassification of Previously Reported Revenue by LOB In the first quarter of 2024, pursuant to the integration of RMS into the Company's order-to-cash systems, the Company reclassified certain prior year revenue by geography disclosures. The impact of the reclassification was not material, and prior year revenue by LOB disclosures have been reclassified to conform to this new presentation, which is disclosed in Note 3.

SUMMARY OF SIGNIFICANT ACCOUNTI

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	12 Months Ended
	Dec. 31, 2024
Accounting Policies [Abstract]
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Basis of Consolidation The consolidated financial statements include those of Moody’s Corporation and its majority- and wholly-owned subsidiaries. The effects of all intercompany transactions have been eliminated. Investments in companies for which the Company has significant influence over operating and financial policies but not a controlling interest are accounted for on an equity basis whereby the Company records its proportional share of the investment’s net income or loss as part of other non-operating income (expense), net and any dividends received reduce the carrying amount of the investment. Equity investments without a readily determinable fair value for which the Company does not have significant influence are accounted for under the ASC Topic 321 measurement alternative; these investments are recorded at initial cost, less impairment, adjusted upward or downward for any observable price changes in similar investments. The Company applies the guidelines set forth in ASC Topic 810 assessing its interests in voting and variable interest entities to decide whether to consolidate an entity. The Company has reviewed the potential variable interest entities and determined that there are no consolidation requirements under ASC Topic 810. The Company consolidates its ICRA subsidiaries on a three month lag. Cash and Cash Equivalents Cash equivalents principally consist of investments in money market deposit accounts and money market funds as well as certificates of deposit with maturities of three months or less when purchased. Short-term Investments Short-term investments are securities with maturities greater than 90 days at the time of purchase that are available for operations in the next 12 months. The Company’s short-term investments primarily consist of certificates of deposit and their cost approximates fair value due to the short-term nature of the instruments. Interest and dividends on these investments are recorded into income when earned. Property and Equipment Property and equipment are stated at cost and are depreciated using the straight-line method over their estimated useful lives. Expenditures for maintenance and repairs that do not extend the economic useful life of the related assets are charged to expense as incurred. Computer Software Developed or Obtained for Internal Use The Company capitalizes costs related to software developed or obtained for internal use. These assets, included in property and equipment in the consolidated balance sheets, relate to MA's SaaS-based solutions as well as the Company’s financial, website and other systems. Such costs generally consist of employee compensation, direct costs for third-party license fees and professional services provided by third parties, in each case incurred either during the application development stage or in connection with upgrades and enhancements that increase functionality. Such costs are depreciated over their estimated useful lives on a straight-line basis. Costs incurred during the preliminary project stage of development as well as maintenance costs are expensed as incurred. The Company also capitalizes implementation costs incurred in cloud computing arrangements (e.g., hosted arrangements) and depreciates the costs over the non-cancellable term of the cloud computing arrangements plus any option renewal periods that are reasonably certain to be exercised or for which the exercise is controlled by the service provider. The Company classifies the amortization of capitalized implementation costs in the same line item in the consolidated statement of operations as the fees associated with the hosting service (i.e., operating and SG&A expense) and classifies the related payments in the consolidated statement of cash flows in the same manner as payments made for fees associated with the hosting service (i.e. cash flows from operating activities). In addition, the capitalization of implementation costs is reflected in the consolidated balance sheets consistent with the location of prepayment of fees for the hosting element (i.e., within other current assets or other assets). Goodwill and Other Acquired Intangible Assets Moody’s evaluates its goodwill for impairment at the reporting unit level, defined as an operating segment (i.e., MA and MIS), or one level below an operating segment (i.e., a component of an operating segment), annually as of July 31 or more frequently if impairment indicators arise in accordance with ASC Topic 350. The Company evaluates the recoverability of goodwill using a two-step impairment test approach at the reporting unit level. In the first step, the Company assesses various qualitative factors to determine whether the fair value of a reporting unit may be less than its carrying amount. If a determination is made based on the qualitative factors that an impairment does not exist, the Company is not required to perform further testing. If the aforementioned qualitative assessment results in the Company concluding that it is more likely than not that the fair value of a reporting unit may be less than its carrying amount, the fair value of the reporting unit will be quantitatively determined and compared to its carrying value including goodwill. If the fair value of the reporting unit exceeds the carrying value of the net assets assigned to that unit, goodwill is not impaired and the Company is not required to perform further testing. If the fair value of the reporting unit is less than the carrying value, the Company will record a goodwill impairment charge for the amount by which the carrying value exceeds the reporting unit’s fair value. The Company evaluates its reporting units on an annual basis, or more frequently if there are changes in the reporting structure of the Company due to acquisitions, realignments or if there are indicators of potential impairment. For the reporting units where the Company is consistently able to conclude that no impairment exists using only a qualitative approach, the Company’s accounting policy is to perform the second step of the aforementioned goodwill impairment assessment at least once every three years. For purposes of assessing the recoverability of goodwill, the Company has four reporting units: two reporting units within MA consisting of businesses that offer: i) data and data-driven analytical solutions; and ii) risk-management software, workflow and CRE solutions and two within the Company’s ratings business (one for the ICRA business and one that encompasses all of Moody’s other ratings operations). Impairment of long-lived assets and definite-lived intangible assets Long-lived assets (including ROU Assets) and amortizable intangible assets are reviewed for recoverability whenever events or changes in circumstances indicate that the carrying amount may not be recoverable. Under the first step of the recoverability assessment, the Company compares the estimated undiscounted future cash flows attributable to the asset or asset group to their carrying value. If the undiscounted future cash flows are greater than the carrying value, no further assessment is required. If the undiscounted future cash flows are less than the carrying value, Moody's proceeds with step two of the assessment. Under step two of this assessment, Moody's is required to determine the fair value of the asset or asset group (reduced by the estimated cost to sell the asset for assets or disposal groups classified as held-for-sale) and recognize an impairment loss if the carrying amount exceeds its fair value. Stock-Based Compensation The Company records compensation expense over the requisite service period for all share-based payment award transactions granted to employees based on the fair value of the equity instrument at the time of grant. This includes shares issued under stock option and restricted stock plans. Derivative Instruments and Hedging Activities Based on the Company’s risk management policy, the Company may use derivative financial instruments to reduce exposure to changes in foreign exchange rates and interest rates. The Company does not enter into derivative financial instruments for speculative purposes. All derivative financial instruments are recorded on the consolidated balance sheets at their respective fair values on a gross basis. The changes in the value of derivatives that qualify as fair value hedges are recorded in the same income statement line item in earnings in which the corresponding adjustment to the carrying value of the hedged item is presented. The entire change in the fair value of derivatives that qualify as cash flow hedges is recorded to OCI and such amounts are reclassified from AOCI(L) to the same income statement line in earnings in the same period or periods during which the hedged transaction affects income. The Company assesses effectiveness for net investment hedges using the spot-method. The entire change in the fair value of derivatives that qualify as net investment hedges is initially recorded to OCI. Those changes in fair value attributable to components included in the assessment of hedge effectiveness in a net investment hedge are recorded in the currency translation adjustment component of OCI and remain in AOCI(L) until the period in which the hedged item affects earnings. Those changes in fair value attributable to components excluded from the assessment of hedge effectiveness in a net investment hedge are recorded to OCI and amortized to earnings using a systematic and rational method over the duration of the hedge. Any changes in the fair value of derivatives that the Company does not designate as hedging instruments under ASC Topic 815 are recorded in the consolidated statements of operations in the period in which they occur. Cash flows from derivatives are recognized in the consolidated statements of cash flows in a manner consistent with the recognition of the underlying hedged item. Revenue Recognition and Costs to Obtain or Fulfill a Contract with a Customer Revenue recognition: Revenue is recognized when control of promised goods or services is transferred to the customer, in an amount that reflects the consideration the Company expects to be entitled to in exchange for those goods or services. When contracts with customers contain multiple performance obligations, the Company accounts for individual performance obligations separately if they are distinct. The transaction price is allocated to each distinct performance obligation on a relative SSP basis. The Company determines the SSP by using the price charged for a deliverable when sold separately or uses management’s best estimate of SSP for goods or services not sold separately using estimation techniques that maximize observable data points, including: internal factors relevant to its pricing practices such as costs and margin objectives; standalone sales prices of similar products; pricing policies; percentage of the fee charged for a primary product or service relative to a related product or service; and geography. Sales, usage-based, value added and other taxes are excluded from revenues. MA Revenue In the MA segment, products and services offered by the Company include hosted research and data subscriptions, installed and hosted software subscriptions, perpetual installed software licenses and related maintenance, or PCS, and professional services. Subscription and PCS contracts are generally invoiced in advance of the contractual coverage period, which is principally one year, but can range from 3-5 years. Professional services are invoiced as those services are provided. Payment terms and conditions vary by contract type, but primarily include a requirement of payment within 30 to 60 days. Revenue from research, data and other hosted subscriptions is recognized ratably over the related subscription period as MA's performance obligation to provide access to these products is progressively fulfilled over the stated term of the contract. A large portion of these services are invoiced in the months of November, December and January. Revenue from installed software subscriptions, which includes PCS, is bifurcated into a software license performance obligation and a PCS performance obligation, which follow the patterns of recognition described above, except for those installed subscriptions where the software license and PCS performance obligations were determined to be incapable of being distinct from each other in accordance with ASC 606-10-25-19 and ASC 606-10-25-20. In such instances, revenue is recognized over time. Revenue from the sale of a software license, when considered distinct from the related software implementation services, is generally recognized at the time the product master or first copy is delivered or transferred to the customer. PCS is generally recognized ratably over the contractual period commencing when the software license is fully delivered. For implementation services and other service projects for which fees are fixed, the Company determined progress towards completion is most accurately measured on a percentage-of-completion basis (input method) as this approach utilizes the most directly observable data points and is therefore used to recognize the related revenue. For implementation services where price varies based on time expended, a time-based measure of progress towards completion of the performance obligation is utilized. Revenue from professional services rendered is generally recognized over time as the services are performed. Products and services offered within the MA segment are sold either stand-alone or together in various combinations. In instances where an arrangement contains multiple performance obligations, the Company accounts for the individual performance obligations separately if they are considered distinct. Revenue is generally allocated to all performance obligations based upon the relative SSP at contract inception. For certain performance obligations, judgment is required to determine the SSP. Revenue is recognized for each performance obligation based upon the conditions for revenue recognition noted above. In the MA segment, customers usually pay a fixed fee for the products and services based on signed contracts. However, accounting for variable consideration is applied mainly for: i) estimates for cancellation rights and price concessions and ii) T&M based services. The Company estimates the variable consideration associated with cancellation rights and price concessions based on the expected amount to be provided to customers and reduces the amount of revenue to be recognized. MIS Revenue In the MIS segment, revenue arrangements with multiple elements are generally comprised of two distinct performance obligations, a rating and the related monitoring service. Revenue attributed to ratings of issued securities is generally recognized when the rating is delivered to the issuer. Revenue attributed to monitoring of issuers or issued securities is recognized ratably over the period in which the monitoring is performed, generally one year. In the case of certain structured finance products, primarily CMBS, issuers can elect to pay all of the annual monitoring fees upfront. These fees are deferred and recognized over the future monitoring periods based on the expected lives of the rated securities. MIS arrangements generally have standard contractual terms for which the stated payments are due at conclusion of the ratings process for ratings and either upfront or in arrears for monitoring services; and are signed by customers either on a per issue basis or at the beginning of the relationship with the customer. In situations when customer fees for an arrangement may be variable, the Company estimates the variable consideration at inception using the expected value method based on analysis of similar contracts in the same line of business, which is constrained based on the Company’s assessment of the realization of the adjustment amount. The Company allocates the transaction price within arrangements that include multiple performance obligations based upon the relative SSP of each service. The SSP for both rating and monitoring services is generally based upon observable selling prices where the rating or monitoring service is sold separately to similar customers. Costs to Obtain or Fulfill a Contract with a Customer: Costs to obtain a contract with a customer Costs incurred to obtain customer contracts, such as sales commissions, are deferred and recorded within other current assets and other assets when such costs are determined to be incremental to obtaining a contract, would not have been incurred otherwise and the Company expects to recover those costs. These costs are amortized to expense on a systematic basis consistent with the transfer of the products or services to the customer. Depending on the line of business to which the contract relates, this may be based upon the average economic life of the products sold or average period for which services are provided, inclusive of anticipated contract renewals. Determining the estimated economic life of the products sold requires judgment with respect to anticipated future technological changes. Costs to obtain customer contracts are only incurred in the MA segment. Cost to fulfill a contract with a customer Costs incurred to fulfill customer contracts, are deferred and recorded within other current assets and other assets when such costs relate directly to a contract, generate or enhance resources of the Company that will be used in satisfying performance obligations in the future and the Company expects to recover those costs. The Company capitalizes royalty costs within the MA segment related to third-party information data providers associated with hosted company information and business intelligence products. These costs are amortized to expense consistent with the recognition pattern of the related revenue over time. In addition, the Company capitalizes work-in-process costs for in-progress MIS ratings, which is recognized consistent with the rendering of the related services to the customers, as ratings are issued. Accounts Receivable Allowances In order to determine an estimate of expected credit losses, receivables are segmented based on similar risk characteristics including historical credit loss patterns to calculate reserve rates. The Company uses an aging method for developing its allowance for credit losses by which receivable balances are stratified based on aging category. A reserve rate is calculated for each aging category which is generally based on historical information, and is adjusted, when necessary, for current conditions (e.g., macroeconomic or industry related) and reasonable and supportable forecasts about the future. The Company also considers customer specific information (e.g., bankruptcy or financial difficulty) when estimating its expected credit losses, as well as the economic environment of the customers, both from an industry and geographic perspective, in evaluating the need for allowances. Expected credit losses are reflected as additions to the accounts receivable allowance. Actual uncollectible account write-offs are recorded against the allowance. Leases The Company has operating leases, which substantially all relate to the lease of office space. The Company’s leases which are classified as finance leases are not material to the consolidated financial statements. The Company determines if an arrangement meets the definition of a lease at contract inception. The Company recognizes in its consolidated balance sheets a lease liability and an ROU Asset for all leases with a lease term greater than 12 months. In determining the length of the lease term, the Company utilizes judgment in assessing the likelihood of whether it is reasonably certain that it will exercise an option to extend or early-terminate a lease, if such options are provided in the lease agreement. ROU Assets represent the Company’s right to use an underlying asset for the lease term and lease liabilities represent the Company’s obligation to make lease payments arising from the lease. ROU Assets and lease liabilities are recognized at the lease commencement date based on the present value of lease payments over the lease term. As substantially all of the Company’s leases do not provide an implicit interest rate, the Company uses its estimated secured incremental borrowing rates at the lease commencement date in determining the present value of lease payments. These secured incremental borrowing rates are attributable to the currency in which the lease is denominated. At commencement, the Company’s initial measurement of the ROU Asset is calculated as the present value of the remaining lease payments (i.e., lease liability), with additive adjustments reflecting: initial direct costs (e.g., broker commissions) and prepaid lease payments (if any); and reduced by any lease incentives provided by the lessor if: (i) received before lease commencement or (ii) receipt of the lease incentive is contingent upon future events for which the occurrence is both probable and within the Company’s control. Lease expense for minimum operating lease payments is recognized on a straight-line basis over the lease term. This straight-line lease expense represents a single lease cost which is comprised of both an interest accretion component relating to the lease liability and amortization of the ROU Assets. The Company records this single lease cost in operating and SG&A expenses. However, in situations where an operating lease ROU Asset has been impaired, the subsequent amortization of the ROU Asset is then recorded on a straight-line basis over the remaining lease term and is combined with accretion expense on the lease liability to result in single operating lease cost (which subsequent to impairment will no longer follow a straight-line recognition pattern). The Company has lease agreements which include lease and non-lease components. For the Company’s office space leases, the lease components (e.g., fixed rent payments) and non-lease components (e.g., fixed common-area maintenance costs) are combined and accounted for as a single lease component. Variable lease payments (e.g., variable common-area-maintenance costs) are only included in the initial measurement of the lease liability to the extent those payments depend on an index or a rate. Variable lease payments not included in the lease liability are recognized in net income in the period in which the obligation for those payments is incurred. Contingencies Moody’s is involved in legal and tax proceedings, governmental, regulatory and legislative investigations and inquiries, claims and litigation that are incidental to the Company’s business, including claims based on ratings assigned by MIS. Moody’s is also subject to ongoing tax audits in the normal course of business. Management periodically assesses the Company’s liabilities and contingencies in connection with these matters based upon the latest information available. Moody’s discloses material pending legal proceedings pursuant to SEC rules and other pending matters as it may determine to be appropriate. For claims, litigation and proceedings and governmental investigations and inquiries not related to income taxes, the Company records liabilities in the consolidated financial statements when it is both probable that a liability has been incurred and the amount of loss can be reasonably estimated and periodically adjusts these as appropriate. When the reasonable estimate of the loss is within a range of amounts, the minimum amount of the range is accrued unless some higher amount within the range is a better estimate than another amount within the range. In instances when a loss is reasonably possible but uncertainties exist related to the probable outcome and/or the amount or range of loss, management does not record a liability but discloses the contingency if material. As additional information becomes available, the Company adjusts its assessments and estimates of such matters accordingly. Moody’s also discloses material pending legal proceedings pursuant to SEC rules and other pending matters as it may determine to be appropriate. In view of the inherent difficulty of assessing the potential outcome of legal proceedings, governmental, regulatory and legislative investigations and inquiries, claims and litigation and similar matters and contingencies, particularly when the claimants seek large or indeterminate damages or assert novel legal theories or the matters involve a large number of parties, the Company often cannot predict what the eventual outcome of the pending matters will be or the timing of any resolution of such matters. The Company also may be unable to predict the impact (if any) that any such matters may have on how its business is conducted, on its competitive position or on its financial position, results of operations or cash flows. As the process to resolve any pending matters progresses, management will continue to review the latest information available and assess its ability to predict the outcome of such matters and the effects, if any, on its operations and financial condition and to accrue for and disclose such matters as and when required. However, because such matters are inherently unpredictable and unfavorable developments or resolutions can occur, the ultimate outcome of such matters, including the amount of any loss, may differ from those estimates. Operating Expenses Operating expenses include costs associated with the development and production of the Company’s products and services and their delivery to customers. These expenses principally include employee compensation and benefits and travel costs that are incurred in connection with these activities. Operating expenses are charged to income as incurred. Selling, General and Administrative Expenses SG&A expenses include such items as compensation and benefits for corporate officers and staff and compensation and other expenses related to sales. They also include items such as office rent, business insurance and professional fees. SG&A expenses are charged to income as incurred. Foreign Currency Translation For all operations outside the U.S. where the Company has designated the local currency as the functional currency, assets and liabilities are translated into U.S. dollars using end of year exchange rates, and revenue and expenses are translated using average exchange rates for the year. For these foreign operations, currency translation adjustments are recorded to other comprehensive income. Comprehensive Income Comprehensive income represents the change in net assets of a business enterprise during a period due to transactions and other events and circumstances from non-owner sources including: foreign currency translation impacts; net actuarial gains and losses and net prior service costs related to pension and other retirement plans; and gains and losses on derivative instruments designated as net investment hedges or cash flow hedges. Comprehensive income items, including cumulative translation adjustments of entities that are less-than-wholly-owned subsidiaries, will be reclassified to noncontrolling interests and thereby, adjusting AOCI(L) proportionately in accordance with the percentage of ownership interest of the non-controlling shareholder. Additionally, the Company reclassifies the income tax effects from AOCI(L) at such time as the earnings or loss of the related activity are recognized in earnings. Income Taxes The Company accounts for income taxes under the asset and liability method in accordance with ASC Topic 740. Therefore, income tax expense is based on reported income before income taxes and deferred income taxes reflect the effect of temporary differences between the amounts of assets and liabilities that are recognized for financial reporting purposes and the amounts that are recognized for income tax purposes. The Company classifies interest related to unrecognized tax benefits as a component of interest expense in its consolidated statements of operations. Penalties are recognized in other non-operating expenses. For UTPs, the Company first determines whether it is more-likely-than-not (defined as a likelihood of more than fifty percent) that a tax position will be sustained based on its technical merits as of the reporting date, assuming that taxing authorities will examine the position and have full knowledge of all relevant information. A tax position that meets this more-likely-than-not threshold is then measured and recognized at the largest amount of benefit that is greater than fifty percent likely to be realized upon effective settlement with a taxing authority. The Company has provided deferred taxes for those entities whose earnings are not considered indefinitely reinvested. Fair Value of Financial Instruments The Company’s financial instruments include cash, cash equivalents, trade receivables and payables, and certain short-term investments consisting primarily of certificates of deposit and money market deposits, all of which are short-term in nature and, accordingly, approximate fair value. The Company also invests in mutual funds, which are accounted for as equity securities with readily determinable fair values under ASC Topic 321. The Company measures these investments at fair value with both realized gains and losses and unrealized holding gains and losses for these investments included in net income. Also, the Company uses derivative instruments to manage certain financial exposures that occur in the normal course of business. These derivative instruments are carried at fair value in the Company’s consolidated balance sheets. Fair value is defined by the ASC Topic 820 as the price that would be received from selling an asset or paid to transfer a liability (i.e., an exit price) in an orderly transaction between market participants at the measurement date. The determination of this fair value is based on the principal or most advantageous market in which the Company could commence transactions and considers assumptions that market participants would use when pricing the asset or liability, such as inherent risk, transfer restrictions and risk of nonperformance. Also, determination of fair value assumes that market participants will consider the highest and best use of the asset. The ASC establishes a fair value hierarchy whereby the inputs contained in valuation techniques used to measure fair value are categorized into three broad levels as follows: Level 1: quoted market prices in active markets that the reporting entity has the ability to access at the date of the fair value measurement; Level 2: inputs other than quoted market prices described in Level 1 that are observable for the asset or liability, either directly or indirectly, such as quoted prices in active markets for similar assets or liabilities, quoted prices for identical or similar assets or liabilities in markets that are not active or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities; Level 3: unobservable inputs that are supported by little or no market activity and that are significant to the fair value measurement of the assets or liabilities. Concentration of Credit Risk Financial instruments that potentially subject the Company to concentration of credit risk principally consist of cash and cash equivalents, short-term investments, trade receivables and derivatives. For cash and cash equivalents, short-term investments and derivatives, the Company manages its credit exposure by limiting the amount of counterparty risk with any particular financial institution; limits are assigned to each counterparty based on perceived quality of credit and are monitored daily. Cash equivalents are held among various money market deposit accounts, money market funds, and certificates of deposits as of December 31, 2024 and 2023. Short-term investments primarily consist of certificates of deposit as of December 31, 2024 and 2023. Derivatives primarily consist of foreign exchange forwards or swap contracts (interest rate swaps and cross-currency swaps) as of December 31, 2024 and 2023. For trade receivables, no customer accounted for 10% or more of accounts receivable at December 31, 2024 or 2023. Earnings per Share of Common Stock Basic shares outstanding is calculated based on the weighted average number of shares of common stock outstanding during th

REVENUES

REVENUES	12 Months Ended
	Dec. 31, 2024
Revenue from Contract with Customer [Abstract]
REVENUES	REVENUES Revenue by Category The following table presents the Company’s revenues disaggregated by LOB: Year Ended December 31, 2024 2023 2022 MA: Decision Solutions (DS) Banking $ 551 $ 521 $ 481 Insurance 598 550 504 KYC 367 312 260 Total DS 1,516 1,383 1,245 Research and Insights (R&I) 926 884 812 Data and Information (D&I) 853 789 712 Total external revenue 3,295 3,056 2,769 Intersegment revenue 13 13 8 Total MA 3,308 3,069 2,777 MIS: Corporate finance (CFG) Investment-grade 488 335 294 High-yield 285 150 108 Bank loans 527 292 275 Other accounts (1) 650 627 592 Total CFG 1,950 1,404 1,269 Structured finance (SFG) Asset-backed securities 130 121 116 RMBS 98 92 106 CMBS 94 60 98 Structured credit 193 129 140 Other accounts (SFG) 3 3 2 Total SFG 518 405 462 Financial institutions (FIG) Banking 450 378 337 Insurance 214 123 113 Managed investments 49 32 28 Other accounts (FIG) 14 12 13 Total FIG 727 545 491 Public, project and infrastructure finance (PPIF) Public finance / sovereign 240 205 197 Project and infrastructure 324 271 234 Total PPIF 564 476 431 Total ratings revenue 3,759 2,830 2,653 MIS Other 34 30 46 Total external revenue 3,793 2,860 2,699 Intersegment royalty 193 186 174 Total MIS 3,986 3,046 2,873 Eliminations (206) (199) (182) Total MCO $ 7,088 $ 5,916 $ 5,468 (1) Other includes: recurring monitoring fees of a rated debt obligation and/or entities that issue such obligations as well as fees from programs such as commercial paper, medium term notes, and ICRA corporate finance revenue. The following table presents the Company’s revenues disaggregated by LOB and geographic area: Year Ended December 31, 2024 Year Ended December 31, 2023 Year Ended December 31, 2022 U.S. Non-U.S. Total U.S. Non-U.S. Total U.S. Non-U.S. Total MA: Decision Solutions $ 570 $ 946 $ 1,516 $ 550 $ 833 $ 1,383 $ 511 $ 734 $ 1,245 Research and Insights 514 412 926 490 394 884 470 342 812 Data and Information 306 547 853 281 508 789 250 462 712 Total MA 1,390 1,905 3,295 1,321 1,735 3,056 1,231 1,538 2,769 MIS: Corporate finance 1,333 617 1,950 952 452 1,404 832 437 1,269 Structured finance 368 150 518 252 153 405 308 154 462 Financial institutions 386 341 727 253 292 545 223 268 491 Public, project and infrastructure finance 359 205 564 292 184 476 266 165 431 Total ratings revenue 2,446 1,313 3,759 1,749 1,081 2,830 1,629 1,024 2,653 MIS Other — 34 34 1 29 30 5 41 46 Total MIS 2,446 1,347 3,793 1,750 1,110 2,860 1,634 1,065 2,699 Total MCO $ 3,836 $ 3,252 $ 7,088 $ 3,071 $ 2,845 $ 5,916 $ 2,865 $ 2,603 $ 5,468 The following table presents the Company's reportable segment revenues disaggregated by segment and geographic region: Year Ended December 31, 2024 2023 2022 MA: U.S. $ 1,390 $ 1,321 $ 1,231 Non-U.S.: EMEA 1,306 1,207 1,060 Asia-Pacific 345 299 268 Americas 254 229 210 Total Non-U.S. 1,905 1,735 1,538 Total MA 3,295 3,056 2,769 MIS: U.S. 2,446 1,750 1,634 Non-U.S.: EMEA 868 679 648 Asia-Pacific 284 271 271 Americas 195 160 146 Total Non-U.S. 1,347 1,110 1,065 Total MIS 3,793 2,860 2,699 Total MCO $ 7,088 $ 5,916 $ 5,468 The following table summarizes the split between transaction and recurring revenue: Year Ended December 31, 2024 2023 2022 Transaction Recurring Total Transaction Recurring Total Transaction Recurring Total Decision Solutions Banking $ 117 $ 434 $ 551 $ 130 $ 391 $ 521 $ 124 $ 357 $ 481 21 % 79 % 100 % 25 % 75 % 100 % 26 % 74 % 100 % Insurance $ 23 $ 575 $ 598 $ 38 $ 512 $ 550 $ 28 $ 476 $ 504 4 % 96 % 100 % 7 % 93 % 100 % 6 % 94 % 100 % KYC $ 2 $ 365 $ 367 $ 1 $ 311 $ 312 $ 1 $ 259 $ 260 1 % 99 % 100 % — % 100 % 100 % — % 100 % 100 % Total Decision Solutions $ 142 $ 1,374 $ 1,516 $ 169 $ 1,214 $ 1,383 $ 153 $ 1,092 $ 1,245 9 % 91 % 100 % 12 % 88 % 100 % 12 % 88 % 100 % Research and Insights $ 15 $ 911 $ 926 $ 16 $ 868 $ 884 $ 17 $ 795 $ 812 2 % 98 % 100 % 2 % 98 % 100 % 2 % 98 % 100 % Data and Information $ 4 $ 849 $ 853 $ 3 $ 786 $ 789 $ — $ 712 $ 712 — % 100 % 100 % — % 100 % 100 % — % 100 % 100 % Total MA (1) $ 161 $ 3,134 $ 3,295 $ 188 $ 2,868 $ 3,056 $ 170 $ 2,599 $ 2,769 5 % 95 % 100 % 6 % 94 % 100 % 6 % 94 % 100 % Corporate Finance $ 1,415 $ 535 $ 1,950 $ 887 $ 517 $ 1,404 $ 772 $ 497 $ 1,269 73 % 27 % 100 % 63 % 37 % 100 % 61 % 39 % 100 % Structured Finance $ 292 $ 226 $ 518 $ 190 $ 215 $ 405 $ 262 $ 200 $ 462 56 % 44 % 100 % 47 % 53 % 100 % 57 % 43 % 100 % Financial Institutions $ 418 $ 309 $ 727 $ 254 $ 291 $ 545 $ 211 $ 280 $ 491 57 % 43 % 100 % 47 % 53 % 100 % 43 % 57 % 100 % Public, Project and Infrastructure Finance $ 384 $ 180 $ 564 $ 301 $ 175 $ 476 $ 263 $ 168 $ 431 68 % 32 % 100 % 63 % 37 % 100 % 61 % 39 % 100 % MIS Other $ 8 $ 26 $ 34 $ 6 $ 24 $ 30 $ 4 $ 42 $ 46 24 % 76 % 100 % 20 % 80 % 100 % 9 % 91 % 100 % Total MIS $ 2,517 $ 1,276 $ 3,793 $ 1,638 $ 1,222 $ 2,860 $ 1,512 $ 1,187 $ 2,699 66 % 34 % 100 % 57 % 43 % 100 % 56 % 44 % 100 % Total Moody’s Corporation $ 2,678 $ 4,410 $ 7,088 $ 1,826 $ 4,090 $ 5,916 $ 1,682 $ 3,786 $ 5,468 38 % 62 % 100 % 31 % 69 % 100 % 31 % 69 % 100 % (1) Revenue from software implementation services and risk management advisory projects, while classified by management as transactional revenue, is recognized over time under GAAP . The following table presents the timing of revenue recognition: Year Ended December 31, 2024 Year Ended December 31, 2023 Year Ended December 31, 2022 MA MIS Total MA MIS Total MA MIS Total Revenue recognized at a point in time $ 101 $ 2,517 $ 2,618 $ 102 $ 1,638 $ 1,740 $ 97 $ 1,512 $ 1,609 Revenue recognized over time 3,194 1,276 4,470 2,954 1,222 4,176 2,672 1,187 3,859 Total $ 3,295 $ 3,793 $ 7,088 $ 3,056 $ 2,860 $ 5,916 $ 2,769 $ 2,699 $ 5,468 Unbilled Receivables, Deferred Revenue and Remaining Performance Obligations Unbilled receivables For certain MA arrangements, the timing of when the Company has the unconditional right to consideration and recognizes revenue occurs prior to invoicing the customer. In addition, certain MIS arrangements contain contractual terms whereby the customers are billed in arrears for annual monitoring services, requiring revenue to be accrued as an unbilled receivable as such services are provided. The following table presents the Company's unbilled receivables, which are included within accounts receivable, net, at December 31, 2024 and December 31, 2023: As of December 31, 2024 As of December 31, 2023 MA MIS MA MIS Unbilled Receivables $ 122 $ 426 $ 119 $ 415 Deferred revenue The Company recognizes deferred revenue when a contract requires a customer to pay consideration to the Company in advance of when revenue related to that contract is recognized. This deferred revenue is relieved when the Company satisfies the related performance obligation and revenue is recognized. Significant changes in the deferred revenue balances during the year ended December 31, 2024 are as follows: Year Ended December 31, 2024 MA MIS Total Balance at December 31, 2023 $ 1,111 $ 270 $ 1,381 Changes in deferred revenue Revenue recognized that was included in the deferred revenue balance at the beginning of the period (1,044) (209) (1,253) Increases due to amounts billable excluding amounts recognized as revenue during the period 1,200 211 1,411 Increases due to acquisitions during the period 9 — 9 Effect of exchange rate changes (33) (4) (37) Total changes in deferred revenue 132 (2) 130 Balance at December 31, 2024 $ 1,243 $ 268 $ 1,511 Deferred revenue - current $ 1,243 $ 211 $ 1,454 Deferred revenue - non-current $ — $ 57 $ 57 Significant changes in the deferred revenue balances during the year ended December 31, 2023 are as follows: Year Ended December 31, 2023 MA MIS Total Balance at December 31, 2022 $ 1,055 $ 278 $ 1,333 Changes in deferred revenue Revenue recognized that was included in the deferred revenue balance at the beginning of the period (980) (211) (1,191) Increases due to amounts billable excluding amounts recognized as revenue during the period 1,015 200 1,215 Effect of exchange rate changes 21 3 24 Total changes in deferred revenue 56 (8) 48 Balance at December 31, 2023 $ 1,111 $ 270 $ 1,381 Deferred revenue - current $ 1,109 $ 207 $ 1,316 Deferred revenue - non-current $ 2 $ 63 $ 65 Significant changes in the deferred revenue balances during the year ended December 31, 2022 are as follows: Year Ended December 31, 2022 MA MIS Total Balance at December 31, 2021 $ 1,039 $ 296 $ 1,335 Changes in deferred revenue Revenue recognized that was included in the deferred revenue balance at the beginning of the period (996) (210) (1,206) Increases due to amounts billable excluding amounts recognized as revenue during the period 1,018 202 1,220 Increases due to acquisitions during the period 1 — 1 Effect of exchange rate changes (7) (10) (17) Total changes in deferred revenue 16 (18) (2) Balance at December 31, 2022 $ 1,055 $ 278 $ 1,333 Deferred revenue—current $ 1,053 $ 205 $ 1,258 Deferred revenue—non-current $ 2 $ 73 $ 75 For the MA segment, for the year ended December 31, 2024, the increase in deferred revenue was primarily due to organic growth. The change in deferred revenue for both segments was not significant for the years ended December 31, 2023 and 2022. Remaining performance obligations Remaining performance obligations in the MA segment include both amounts recorded as deferred revenue on the consolidated balance sheet as of December 31, 2024 as well as amounts not yet invoiced to customers as of December 31, 2024, largely reflecting future revenue related to signed multi-year arrangements for hosted and installed subscription-based products. As of December 31, 2024, the aggregate amount of the transaction price allocated to remaining performance obligations was approximately $4.4 billion. The Company expects to recognize into revenue approximately 55% of this balance within one year, approximately 25% of this balance between one Remaining performance obligations in the MIS segment largely reflect deferred revenue related to monitoring fees for certain structured finance products, primarily CMBS, where the issuers can elect to pay the monitoring fees for the life of the security in advance. As of December 31, 2024, the aggregate amount of the transaction price allocated to remaining performance obligations was approximately $102 million. The Company expects to recognize into revenue approximately 25% of this balance within one year, approximately 50% of this balance between one Costs to Obtain or Fulfill a Contract with a Customer MA Costs to Obtain a Contract with a Customer As of December 31, 2024 2023 Capitalized costs to obtain sales contracts $ 294 $ 268 Year ended December 31, 2024 2023 2022 Amortization of capitalized costs to obtain sales contracts $ 110 $ 102 $ 80 Amortization of costs incurred to obtain customer contracts is included within SG&A expenses in the consolidated statements of operations. Costs incurred to obtain customer contracts are only in the MA segment. MA and MIS Costs to Fulfill a Contract with a Customer As of December 31, 2024 As of December 31, 2023 MA MIS Total MA MIS Total Capitalized costs to fulfill sales contracts $ 39 $ 12 $ 51 $ 35 $ 9 $ 44 Year Ended Year Ended Year Ended MA MIS Total MA MIS Total MA MIS Total Amortization of capitalized costs to fulfill sales contracts $ 77 $ 43 $ 120 $ 70 $ 44 $ 114 $ 69 $ 54 $ 123

RECONCILIATION OF WEIGHTED AVER

RECONCILIATION OF WEIGHTED AVERAGE SHARES OUTSTANDING	12 Months Ended
	Dec. 31, 2024
Earnings Per Share [Abstract]
RECONCILIATION OF WEIGHTED AVERAGE SHARES OUTSTANDING	RECONCILIATION OF WEIGHTED AVERAGE SHARES OUTSTANDING Below is a reconciliation of basic to diluted shares outstanding: Year Ended December 31, 2024 2023 2022 Basic 181.8 183.2 183.9 Dilutive effect of shares issuable under stock-based compensation plans 0.9 0.8 0.8 Diluted 182.7 184.0 184.7 Antidilutive options to purchase common shares and restricted stock as well as contingently issuable restricted stock which are excluded from the table above 0.4 0.5 0.5

CASH EQUIVALENTS AND INVESTMENT

CASH EQUIVALENTS AND INVESTMENTS	12 Months Ended
	Dec. 31, 2024
Cash and Cash Equivalents [Abstract]
CASH EQUIVALENTS AND INVESTMENTS	CASH EQUIVALENTS AND INVESTMENTS The tables below provide additional information on the Company’s cash equivalents and investments: As of December 31, 2024 Cost Gross Unrealized Gains Fair Value Consolidated Balance Sheet location Cash and cash equivalents Short-term investments Other assets Certificates of deposit and money market deposit accounts/funds (1) $ 1,911 $ — $ 1,911 $ 1,345 $ 566 $ — Mutual funds $ 88 $ 10 $ 98 $ — $ — $ 98 As of December 31, 2023 Cost Gross Unrealized Gains Fair Value Consolidated Balance Sheet location Cash and cash equivalents Short-term investments Other assets Certificates of deposit and money market deposit accounts/funds (1) $ 1,178 $ — $ 1,178 $ 1,112 $ 63 $ 3 Mutual funds $ 91 $ 6 $ 97 $ — $ — $ 97 (1) Consists of time deposits, money market deposit accounts and money market funds. The remaining contractual maturities for the certificates of deposits classified as short-term investments are 1 month to 12 months at both December 31, 2024 and December 31, 2023. The remaining contractual maturities for the certificates of deposit classified in other assets are 14 months at December 31, 2023. Time deposits with a maturity of less than 90 days at time of purchase are classified as cash and cash equivalents. In addition, the Company is invested in COLI. As of December 31, 2024 and December 31, 2023, the contract value of the COLI was $48 million and $47 million, respectively.

DERIVATIVE INSTRUMENTS AND HEDG

DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES	12 Months Ended
	Dec. 31, 2024
Derivative Instruments and Hedging Activities Disclosure [Abstract]
DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES	DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES The Company is exposed to global market risks, including risks from changes in FX rates and changes in interest rates. Accordingly, the Company uses derivatives in certain instances to manage financial exposures that occur in the normal course of business. The Company does not hold or issue derivatives for speculative purposes. Derivatives and non-derivative instruments designated as accounting hedges: Fair Value Hedges Interest Rate Swaps The Company has entered into interest rate swaps to convert the fixed interest rate on certain of its long-term debt to a floating interest rate based on the SOFR. The purpose of these hedges is to mitigate the risk associated with changes in the fair value of the long-term debt, thus the Company has designated these swaps as fair value hedges. The fair value of the swaps is adjusted quarterly with a corresponding adjustment to the carrying value of the debt. The changes in the fair value of the swaps and the underlying hedged item generally offset and the net cash settlements on the swaps are recorded each period within interest expense, net in the Company’s consolidated statements of operations. The following table summarizes the Company’s interest rate swaps designated as fair value hedges: Notional Amount Hedged Item Nature of Swap As of December 31, 2024 As of December 31, 2023 Floating Interest Rate 2014 Senior Notes due 2044 Pay Floating/Receive Fixed $ 300 $ 300 SOFR 2017 Senior Notes due 2028 Pay Floating/Receive Fixed 500 500 SOFR 2018 Senior Notes due 2029 Pay Floating/Receive Fixed 400 400 SOFR 2018 Senior Notes due 2048 Pay Floating/Receive Fixed 300 300 SOFR 2020 Senior Notes due 2025 Pay Floating/Receive Fixed 300 300 SOFR 2022 Senior Notes due 2052 Pay Floating/Receive Fixed 500 500 SOFR 2022 Senior Notes due 2032 Pay Floating/Receive Fixed 250 250 SOFR Total $ 2,550 $ 2,550 Refer to Note 16 for information on the cumulative amount of fair value hedging adjustments included in the carrying amount of the above hedged items. The following table summarizes the impact to the statements of operations of the Company’s interest rate swaps designated as fair value hedges: Total amounts of financial statement line item presented in the statements of operations in which the effects of fair value hedges are recorded Amount of income (expense) recognized in the Consolidated Statements of Operations Year Ended December 31, 2024 2023 2022 Interest expense, net $ (237) $ (251) $ (231) Description Location on consolidated Statements of Operations Net interest settlements and accruals on interest rate swaps Interest expense, net $ (96) $ (89) $ (8) Fair value changes on interest rate swaps Interest expense, net $ 14 $ 56 $ (228) Fair value changes on hedged debt Interest expense, net $ (14) $ (56) $ 228 Net Investment Hedges Debt designated as net investment hedges The Company has designated €500 million of the 2015 Senior Notes Due 2027 and €750 million of the 2019 Senior Notes due 2030 as net investment hedges to mitigate FX exposure related to a portion of the Company’s euro net investment in certain foreign subsidiaries against changes in euro/USD exchange rates. These hedges are designated as accounting hedges under the applicable sections of ASC Topic 815 and will end upon the repayment of the notes in 2027 and 2030, respectively, unless terminated early at the discretion of the Company. Cross currency swaps designated as net investment hedges The Company enters into cross-currency swaps to mitigate FX exposure related to a portion of the Company’s euro net investment in certain foreign subsidiaries against changes in euro/USD exchange rates. The following tables provide information on the cross-currency swaps designated as net investment hedges under ASC Topic 815: December 31, 2024 Pay Receive Nature of Swap Notional Amount Weighted Average Interest Rate Notional Amount Weighted Average Interest Rate Pay Fixed/Receive Fixed € 965 2.91% $ 1,014 4.41% Pay Floating/Receive Floating 2,138 Based on ESTR 2,250 Based on SOFR Total € 3,103 $ 3,264 December 31, 2023 Pay Receive Nature of Swap Notional Amount Weighted Average Interest Rate Notional Amount Weighted Average Interest Rate Pay Fixed/Receive Fixed € 765 3.67% $ 800 5.25% Pay Floating/Receive Floating 2,138 Based on ESTR 2,250 Based on SOFR Total € 2,903 $ 3,050 As of December 31, 2024, these hedges will expire and the notional amounts will be settled as follows unless terminated early at the discretion of the Company: Year Ending December 31, Notional Amount (Pay) Notional Amount (Receive) 2026 € 450 $ 500 2027 531 550 2028 588 600 2029 573 614 2031 481 500 2032 480 500 Total € 3,103 $ 3,264 The following table provides information on the gains (losses) on the Company’s net investment and cash flow hedges: Amount of Gain (Loss) Recognized in AOCL on Derivative, net of Tax Amount of Gain (Loss) Reclassified from AOCL into Income, net of tax Gain (Loss) Recognized in Income on Derivative (Amount Excluded from Effectiveness Testing) Derivative and Non-Derivative Instruments in Net Investment Hedging Relationships Year Ended December 31, Year Ended December 31, Year Ended December 31, 2024 2023 2022 2024 2023 2022 2024 2023 2022 Cross currency swaps $ 157 $ (97) $ 99 $ — $ — $ — $ 47 $ 54 $ 56 Long-term debt 65 (35) 65 — — — — — — Total net investment hedges $ 222 $ (132) $ 164 $ — $ — $ — $ 47 $ 54 $ 56 Derivatives in Cash Flow Hedging Relationships Cross currency swaps $ — $ — $ — $ — $ 1 $ — $ — $ — $ — Interest rate contracts — — — (2) (2) (2) — — — Total cash flow hedges $ — $ — $ — $ (2) $ (1) $ (2) $ — $ — $ — Total $ 222 $ (132) $ 164 $ (2) $ (1) $ (2) $ 47 $ 54 $ 56 The cumulative amount of net investment hedge and cash flow hedge gains (losses) remaining in AOCL is as follows: Cumulative Gains (Losses), net of tax December 31, 2024 December 31, 2023 Net investment hedges Cross currency swaps $ 178 $ 21 FX forwards 29 29 Long-term debt 68 3 Total net investment hedges 275 53 Cash flow hedges Interest rate contracts (43) (45) Cross currency swaps 1 1 Total cash flow hedges (42) (44) Total net gain in AOCL $ 233 $ 9 Derivatives not designated as accounting hedges: Foreign exchange forwards The Company also enters into foreign exchange forward contracts to mitigate the change in fair value on certain assets and liabilities denominated in currencies other than a subsidiary’s functional currency. These forward contracts are not designated as accounting hedges under the applicable sections of ASC Topic 815. Accordingly, changes in the fair value of these contracts are recognized immediately in other non-operating income, net in the Company’s consolidated statements of operations along with the FX gain or loss recognized on the assets and liabilities denominated in a currency other than the subsidiary’s functional currency. These contracts have expiration dates at various times through July 2025. The following table summarizes the notional amounts of the Company’s outstanding foreign exchange forwards: December 31, 2024 December 31, 2023 Notional amount of currency pair (1) : Sell Buy Sell Buy Contracts to sell USD for GBP $ 604 £ 470 $ 513 £ 407 Contracts to sell USD for JPY $ 29 ¥ 4,000 $ 14 ¥ 2,000 Contracts to sell USD for CAD $ 35 C$ 50 $ 147 C$ 200 Contracts to sell USD for SGD $ 45 S$ 59 $ 50 S$ 67 Contracts to sell USD for EUR $ — € — $ 60 € 55 Contracts to sell USD for INR $ 23 ₹ 1,900 $ 23 ₹ 1,900 Contracts to sell EUR for USD € 12 $ 12 € — $ — Contracts to sell USD for AUD $ — A$ — $ 5 A$ 8 Contracts to sell CAD for USD C$ — $ — C$ 25 $ 19 (1) € = euro, £ = British pound, S$ = Singapore dollar, $ = U.S. dollar, ¥ = Japanese yen, C$ = Canadian dollar, ₹= Indian rupee, A$ = Australian dollar Total Return Swaps The Company has entered into total return swaps to mitigate market-driven changes in the value of certain liabilities associated with the Company's deferred compensation plans. The fair value of these swaps at December 31, 2024 and related gains in the year ended December 31, 2024 were not material. The notional amount of the total return swaps at December 31, 2024 and December 31, 2023 was $66 million and $58 million, respectively. The following table summarizes the impact to the consolidated statements of operations relating to the gains (losses) on the Company’s derivatives which are not designated as hedging instruments: Year Ended December 31, Derivatives not designated as accounting hedges Location on Consolidated Statements of Operations 2024 2023 2022 FX forwards Other non-operating income, net $ (24) $ 15 $ (72) Total return swaps Operating expense $ 5 $ 2 $ — Total return swaps SG&A expense $ 1 $ 1 $ — The table below shows the classification between assets and liabilities on the Company’s consolidated balance sheets for the fair value of the derivative instruments as well as the carrying value of its non-derivative debt instruments designated and qualifying as net investment hedges: Derivative and Non-derivative Instruments Consolidated Balance Sheet Location December 31, 2024 December 31, 2023 Assets: Derivatives designated as accounting hedges: Cross currency swaps designated as net investment hedges Other assets $ 58 $ 3 Total derivatives designated as accounting hedges 58 3 Derivatives not designated as accounting hedges: FX forwards on certain assets and liabilities Other current assets — 13 Total assets $ 58 $ 16 Liabilities: Derivatives designated as accounting hedges: Interest rate swaps designated as fair value hedges Accounts payable and accrued liabilities $ 3 $ — Cross currency swaps designated as net investment hedges Other liabilities 26 183 Interest rate swaps designated as fair value hedges Other liabilities 166 183 Total derivatives designated as accounting hedges 195 366 Non-derivatives designated as accounting hedges: Long-term debt designated as net investment hedge Long-term debt 1,294 1,381 Derivatives not designated as accounting hedges: FX forwards on certain assets and liabilities Accounts payable and accrued liabilities 21 — Total liabilities $ 1,510 $ 1,747

PROPERTY AND EQUIPMENT, NET

PROPERTY AND EQUIPMENT, NET	12 Months Ended
	Dec. 31, 2024
Property, Plant and Equipment [Abstract]
PROPERTY AND EQUIPMENT, NET	PROPERTY AND EQUIPMENT, NET Property and equipment, net consisted of: December 31, 2024 2023 Office and computer equipment (3 - 10 year estimated useful life) $ 400 $ 354 Office furniture and fixtures (3 - 10 year estimated useful life) 57 57 Internal-use computer software (1 - 10 year estimated useful life) 1,417 1,232 Leasehold improvements and building (1 - 20 year estimated useful life) 235 232 Total property and equipment, at cost 2,109 1,875 Less: accumulated depreciation and amortization (1,453) (1,272) Total property and equipment, net $ 656 $ 603 The increase in internal-use computer software in the table above primarily relates to capitalized software development costs pursuant to MA's strategic shift to SaaS-based solutions. Depreciation and amortization expense related to the above assets for the years ended December 31, 2024, 2023, and 2022 was $233 million, $175 million, and $131 million, respectively, of which $180 million, $121 million, and $79 million, respectively, related to amortization of internal-use computer software. The amounts for the year ended December 31, 2024 exclude incremental amortization expense of $26 million associated with internal-use computer software which is presented within charges related to asset abandonment on the consolidated statement of operations, as more fully discussed in Note 22 to the consolidated financial statements.

GOODWILL AND OTHER ACQUIRED INT

GOODWILL AND OTHER ACQUIRED INTANGIBLE ASSETS	12 Months Ended
	Dec. 31, 2024
Goodwill and Intangible Assets Disclosure [Abstract]
GOODWILL AND OTHER ACQUIRED INTANGIBLE ASSETS	GOODWILL AND OTHER ACQUIRED INTANGIBLE ASSETS The following tables summarize the activity in goodwill: Year Ended December 31, 2024 MA MIS Consolidated Gross Accumulated Net Gross Accumulated Net Gross Accumulated Net Balance at beginning of year $ 5,681 $ (12) $ 5,669 $ 287 $ — $ 287 $ 5,968 $ (12) $ 5,956 Additions/ adjustments (1) 112 — 112 97 — 97 209 — 209 Foreign currency translation adjustments (167) — (167) (4) — (4) (171) — (171) Ending Balance $ 5,626 $ (12) $ 5,614 $ 380 $ — $ 380 $ 6,006 $ (12) $ 5,994 Year Ended December 31, 2023 MA MIS Consolidated Gross Accumulated Net Gross Accumulated Net Gross Accumulated Net Balance at beginning of year $ 5,474 $ (12) $ 5,462 $ 377 $ — $ 377 $ 5,851 $ (12) $ 5,839 Additions/ adjustments (2) 90 — 90 (87) — (87) 3 — 3 Foreign currency translation adjustments 117 — 117 (3) — (3) 114 — 114 Ending balance $ 5,681 $ (12) $ 5,669 $ 287 $ — $ 287 $ 5,968 $ (12) $ 5,956 (1) The 2024 additions/adjustments primarily relate to certain immaterial acquisitions in 2024 (most notably GCR, Numerated and Praedicat). (2) The 2023 additions/adjustments primarily relate to a reallocation of goodwill pursuant to a realignment of certain components of the Company's ESG business in the first quarter of 2023 Acquired intangible assets and related accumulated amortization consisted of: December 31, 2024 2023 Customer relationships $ 2,035 $ 2,065 Accumulated amortization (631) (556) Net customer relationships 1,404 1,509 Software/product technology 695 674 Accumulated amortization (419) (364) Net software/product technology 276 310 Database 166 179 Accumulated amortization (89) (82) Net database 77 97 Trade names 199 199 Accumulated amortization (83) (72) Net trade names 116 127 Other (1) 67 52 Accumulated amortization (50) (46) Net other 17 6 Total $ 1,890 $ 2,049 (1) Other intangible assets primarily consist of trade secrets, covenants not to compete, and acquired ratings methodologies and models. Amortization expense relating to acquired intangible assets is as follows: Year Ended December 31, 2024 2023 2022 Amortization expense (1) $ 198 $ 198 $ 200 (1) Amount for the year ended December 31, 2024 excludes incremental amortization expense of $5 million associated with amortizable intangible assets which is presented within charges related to asset abandonment on the consolidated statement of operations, as more fully discussed in Note 22 to the consolidated financial statements. Estimated future annual amortization expense for intangible assets subject to amortization is as follows: Year Ending December 31, 2025 $ 202 2026 196 2027 178 2028 166 2029 133 Thereafter 1,015 Total estimated future amortization $ 1,890

RESTRUCTURING

RESTRUCTURING	12 Months Ended
	Dec. 31, 2024
Restructuring and Related Activities [Abstract]
RESTRUCTURING	RESTRUCTURING On December 19, 2024, the CEO of Moody’s approved the Strategic and Operational Efficiency Restructuring Program. The Company estimates that upon completion, the program will result in annualized savings of $250 million to $300 million. This program relates to the Company's strategy to realign its operations toward high priority growth areas and to consolidate certain functions to simplify the organization to enable improved operating efficiency and leverage. This program will primarily include a reduction in staff, the rationalization and exit of certain leased office spaces and the retirement of certain legacy software applications. The program includes $170 million to $200 million of expected pre-tax personnel-related restructuring charges, an amount that includes severance costs, expense related to the modification of equity awards and other related costs primarily determined under the Company’s existing severance plans. In addition, the program is expected to result in $10 million to $20 million of non-cash charges from the exit from certain leased office spaces and $20 million to $30 million of non-cash charges related to incremental amortization of internally developed software due to a reduction in the useful life of the software assets. The savings generated from the Strategic and Operational Efficiency Restructuring Program are expected to strengthen the Company's operating margin, with a portion being deployed to support strategic investments. The Strategic and Operational Efficiency Restructuring Program is expected to be substantially complete by the end of 2026. Cash outlays associated with this program are expected to be $170 million to $200 million, which are expected to be paid through 2027. On June 30, 2022, the CEO of Moody’s approved the 2022 - 2023 Geolocation Restructuring Program. This program related to the Company's post-COVID-19 geolocation strategy and other strategic initiatives and included the rationalization and exit of certain leased office spaces and a reduction in staff, including the relocation of certain job functions. Cumulative charges related to this program are shown in the table below. The savings generated from the 2022 - 2023 Geolocation Restructuring Program will strengthen the Company's operating margin, with a portion being deployed to support strategic investments, including the Company's workplace of the future program and employee retention initiatives. The 2022 - 2023 Geolocation Restructuring Program was substantially complete at the end of 2023. Total expenses included in the accompanying consolidated statements of operations related to the aforementioned restructuring programs are outlined below: Year ended December 31, Cumulative expense incurred 2024 2023 2022 2022 - 2023 Geolocation Restructuring Program Employee Termination Costs $ 14 $ 51 $ 85 $ 150 Real Estate Related Costs (1) — 36 27 63 Other Costs (2) — — 1 1 Total 2022-2023 Geolocation Restructuring Program Costs $ 14 $ 87 $ 113 $ 214 Strategic and Operational Efficiency Restructuring Program Employee Termination Costs (3) $ 41 $ — $ — $ 41 Other Costs (2) 4 — — 4 Total Strategic and Operational Efficiency Restructuring Program Costs $ 45 $ — $ — $ 45 Total Restructuring $ 59 $ 87 $ 113 (1) For the year ended December 31, 2023, primarily includes ROU Asset impairment charges. For the year ended December 31, 2022, primarily includes ROU Asset and leasehold improvement impairment charges and the non-cash acceleration of amortization of abandoned ROU Assets and leasehold improvements. The fair value of the impaired assets in both periods was determined by utilizing the present value of the estimated future cash flows attributable to the assets. The fair value of those assets subsequent to the impairment for the year ended December 31, 2023 was $4 million and was categorized as Level 3 within the ASC Topic 820 fair value hierarchy. The fair value of those assets subsequent to the impairment for the year ended December 31, 2022 was $0. (2) Primarily includes professional service fees related to execution of the restructuring program. (3) Primarily includes severance costs and expense related to the modification of equity awards. Changes to the restructuring liability for the aforementioned restructuring programs were as follows: 2024 2023 2022 Balance as of January 1 $ 36 $ 64 $ — 2022 - 2023 Geolocation Restructuring Program: Cost incurred and adjustments 14 51 86 Cash payments (42) (79) (22) Strategic and Operational Efficiency Restructuring Program: Cost incurred and adjustments 44 — — Cash payments (5) — — Balance as of December 31 (1) $ 47 $ 36 $ 64 (1) Restructuring liability is primarily comprised of employee termination costs and other severance-related charges. As of December 31, 2024, substantially all of the remaining $47 million restructuring liability is expected to be paid out in 2025.

FAIR VALUE

FAIR VALUE	12 Months Ended
	Dec. 31, 2024
Fair Value Disclosures [Abstract]
FAIR VALUE	FAIR VALUE The tables below present information about items that are carried at fair value at December 31, 2024 and 2023: Fair value Measurement as of December 31, 2024 Description Balance Level 1 Level 2 Assets: Derivatives (1) $ 58 $ — $ 58 Money market funds/mutual funds 108 108 — Total $ 166 $ 108 $ 58 Liabilities: Derivatives (1) $ 216 $ — $ 216 Total $ 216 $ — $ 216 Fair Value Measurement as of December 31, 2023 Description Balance Level 1 Level 2 Assets: Derivatives (1) $ 16 $ — $ 16 Money market funds/mutual funds 107 107 — Total $ 123 $ 107 $ 16 Liabilities: Derivatives (1) $ 366 $ — $ 366 Total $ 366 $ — $ 366 (1) Represents fair value of certain derivative contracts as more fully described in Note 6 to the consolidated financial statements. The following are descriptions of the methodologies utilized by the Company to estimate the fair value of its derivative contracts, money market mutual funds and mutual funds: Derivatives: In determining the fair value of the derivative contracts in the tables above, the Company utilizes industry standard valuation models. Where applicable, these models project future cash flows and discount the future amounts to a present value using spot rates, forward points, currency volatilities, interest rates as well as the risk of non-performance of the Company and the counterparties with whom it has derivative contracts. The Company established strict counterparty credit guidelines and only enters into transactions with financial institutions that adhere to these guidelines. Accordingly, the risk of counterparty default is deemed to be minimal. Money market funds and mutual funds: The money market funds and mutual funds in the tables above are deemed to be equity securities with readily determinable fair values with changes in fair value recognized through net income under ASC Topic 321. The fair value of these instruments is determined using Level 1 inputs as defined in the ASC Topic 820.

OTHER BALANCE SHEET INFORMATION

OTHER BALANCE SHEET INFORMATION	12 Months Ended
	Dec. 31, 2024
Other Balance Sheet Information [Abstract]
OTHER BALANCE SHEET INFORMATION	OTHER BALANCE SHEET INFORMATION The following tables contain additional detail related to certain balance sheet captions: December 31, 2024 2023 Other current assets: Prepaid taxes $ 81 $ 115 Prepaid expenses 179 133 Capitalized costs to obtain and fulfill sales contracts 131 116 Foreign exchange forwards on certain assets and liabilities — 13 Interest receivable on interest rate and cross currency swaps 77 79 Other 47 33 Total other current assets $ 515 $ 489 December 31, 2024 2023 Other assets: Investments in non-consolidated affiliates $ 465 $ 521 Deposits for real-estate leases 15 16 Indemnification assets related to acquisitions 109 111 Mutual funds, certificates of deposit and money market deposit accounts/funds 98 100 Company owned life insurance (at contract value) 48 47 Capitalized costs to obtain sales contracts 214 196 Derivative instruments designated as accounting hedges 58 3 Pension and other retirement employee benefits 60 41 Other 99 103 Total other assets $ 1,166 $ 1,138 December 31, 2024 2023 Accounts payable and accrued liabilities: Salaries and benefits $ 133 $ 130 Incentive compensation 452 345 Customer credits, advanced payments and advanced billings 142 105 Dividends 32 7 Professional service fees 38 46 Interest accrued on debt 92 83 Accounts payable 53 23 Income taxes 144 108 Pension and other retirement employee benefits 11 15 Accrued royalties 25 24 FX forwards on certain assets and liabilities 21 — Restructuring liability 46 35 Derivative instruments designated as accounting hedges 3 — Interest payable on interest rate and cross currency swaps 60 67 Other 92 88 Total accounts payable and accrued liabilities $ 1,344 $ 1,076 December 31, 2024 2023 Other liabilities: Pension and other retirement employee benefits $ 195 $ 190 Interest accrued on UTPs 47 36 MAKS indemnification provisions 19 19 Income tax liability – non-current portion 12 15 Derivative instruments designated as accounting hedges 192 366 Other 52 50 Total other liabilities $ 517 $ 676 Investments in non-consolidated affiliates: The following table provides additional detail regarding Moody's investments in non-consolidated affiliates, as included in other assets in the consolidated balance sheets: December 31, 2024 2023 Equity method investments (1) $ 127 $ 186 Investments measured using the measurement alternative (2) 328 327 Other 10 8 Total investments in non-consolidated affiliates $ 465 $ 521 (1) Equity securities in which the Company has significant influence over the investee but does not have a controlling financial interest in accordance with ASC Topic 323. (2) Equity securities without readily determinable fair value for which the Company has elected to apply the measurement alternative in accordance with ASC Topic 321, which is more fully discussed in Note 2. Moody's holds various investments accounted for under the equity method, the most significant of which is the Company's minority investment in CCXI. Moody's also holds various investments measured using the measurement alternative, the most significant of which is the Company's minority interest in BitSight. Refer to Note 22 for disclosure on earnings from non-consolidated affiliates, which are included within other non-operating income, net.

COMPREHENSIVE INCOME AND ACCUMU

COMPREHENSIVE INCOME AND ACCUMULATED OTHER COMPREHENSIVE INCOME	12 Months Ended
	Dec. 31, 2024
Equity [Abstract]
COMPREHENSIVE INCOME AND ACCUMULATED OTHER COMPREHENSIVE INCOME	COMPREHENSIVE INCOME AND ACCUMULATED OTHER COMPREHENSIVE INCOME The amounts reclassified out of AOCL, as shown in the consolidated statements of comprehensive income, were not material for all periods presented. The following tables show changes in AOCL by component (net of tax): Year Ended December 31, 2024 Pension and Gains (Losses) on Cash Flow Hedges Foreign Net Investment Hedges Total Balance at December 31, 2023 $ (56) $ (44) $ (520) $ 53 $ (567) Other comprehensive income (loss) before reclassifications 19 — (312) 222 (71) Amounts reclassified from AOCL (2) 2 — — — Other comprehensive income (loss) 17 2 (312) 222 (71) Balance at December 31, 2024 $ (39) $ (42) $ (832) $ 275 $ (638) Year Ended December 31, 2023 Pension and Gains (Losses) on Cash Flow Hedges Foreign Net Investment Hedges Total Balance at December 31, 2022 $ (47) $ (45) $ (736) $ 185 $ (643) Other comprehensive income (loss) before reclassifications (6) — 216 (132) 78 Amounts reclassified from AOCL (3) 1 — — (2) Other comprehensive income (loss) (9) 1 216 (132) 76 Balance at December 31, 2023 $ (56) $ (44) $ (520) $ 53 $ (567) Year Ended December 31, 2022 Pension and Gains (Losses) on Cash Flow Hedges Foreign Net Investment Hedges Total Balance at December 31, 2021 $ (49) $ (47) $ (335) $ 21 $ (410) Other comprehensive income (loss) before reclassifications — — (421) 164 (257) Amounts reclassified from AOCL 2 2 20 — 24 Other comprehensive income (loss) 2 2 (401) 164 (233) Balance at December 31, 2022 $ (47) $ (45) $ (736) $ 185 $ (643)

PENSION AND OTHER RETIREMENT BE

PENSION AND OTHER RETIREMENT BENEFITS	12 Months Ended
	Dec. 31, 2024
Retirement Benefits [Abstract]
PENSION AND OTHER RETIREMENT BENEFITS	PENSION AND OTHER RETIREMENT BENEFITS U.S. Plans Moody’s maintains funded and unfunded noncontributory DBPPs. The DBPPs provide defined benefits using a cash balance formula based on years of service and career average salary or final average pay for selected executives. The Company also provides certain healthcare and life insurance benefits for retired U.S. employees. The retirement healthcare plans are contributory; the life insurance plans are noncontributory. Moody’s funded and unfunded U.S. pension plans, the U.S. retirement healthcare plans and the U.S. retirement life insurance plans are collectively referred to herein as the “Retirement Plans.” The U.S. retirement healthcare plans and the U.S. retirement life insurance plans are collectively referred to herein as the “Other Retirement Plans.” Through 2007, substantially all U.S. employees were eligible to participate in the Company’s DBPPs. Effective January 1, 2008, the Company no longer offers DBPPs to U.S. employees hired or rehired on or after January 1, 2008, and new hires in the U.S. instead will receive a retirement contribution in similar benefit value under the Company’s Profit Participation Plan. Current participants of the Company’s Retirement Plans and Other Retirement Plans continue to accrue benefits based on existing plan benefit formulas. The following is a summary of changes in benefit obligations and fair value of plan assets for the Retirement Plans for the years ended December 31: Pension Plans Other Retirement Plans 2024 2023 2024 2023 Change in benefit obligation: Benefit obligation, beginning of the period $ (484) $ (462) $ (42) $ (39) Service cost (10) (11) (3) (3) Interest cost (22) (22) (2) (2) Plan participants’ contributions — — (2) (1) Benefits paid 24 30 3 2 Actuarial (loss) gain — (4) — 2 Assumption changes 28 (15) 4 (1) Benefit obligation, end of the period $ (464) $ (484) $ (42) $ (42) Change in plan assets: Fair value of plan assets, beginning of the period $ 449 $ 420 $ — $ — Actual return on plan assets 24 48 — — Benefits paid (24) (30) (3) (2) Employer contributions 11 11 1 1 Plan participants’ contributions — — 2 1 Fair value of plan assets, end of the period $ 460 $ 449 $ — $ — Funded status of the plans $ (4) $ (35) $ (42) $ (42) Amounts recorded on the consolidated balance sheets: Pension and retirement benefits asset – non current $ 60 $ 40 $ — $ — Pension and retirement benefits liability – current (8) (13) (2) (2) Pension and retirement benefits liability – non current (56) (62) (40) (40) Net amount recognized $ (4) $ (35) $ (42) $ (42) Accumulated benefit obligation, end of the period $ (436) $ (453) The net decrease in the pension benefit obligation from assumption changes in 2024 primarily resulted from increases to the discount rates used to measure the obligation. The net increase in the pension benefit obligation from assumption changes and actuarial losses in 2023 primarily resulted from decreases to the discount rates and an increase to the annuity conversion rate used to measure the obligation. The following information is for those pension plans with an accumulated benefit obligation in excess of plan assets: December 31, 2024 2023 Aggregate projected benefit obligation $ 65 $ 75 Aggregate accumulated benefit obligation $ 57 $ 67 The following table summarizes the pre-tax net actuarial losses and prior service costs recognized in AOCL for the Company’s Retirement Plans as of December 31: Pension Plans Other Retirement Plans 2024 2023 2024 2023 Net actuarial gains (losses) $ (61) $ (82) $ 13 $ 10 Net prior service credits 1 1 — — Total recognized in AOCL – pre-tax $ (60) $ (81) $ 13 $ 10 Net periodic pension expenses (income) recognized for the Retirement Plans are as follows for the years ended December 31: Pension Plans Other Retirement Plans 2024 2023 2022 2024 2023 2022 Components of net periodic expense (income) Service cost $ 10 $ 11 $ 14 $ 3 $ 3 $ 4 Interest cost 22 22 15 2 2 1 Expected return on plan assets (30) (32) (26) — — — Amortization of net actuarial (gains) losses and prior service credits from earlier periods — (1) 3 (1) (1) — (Gain) loss on settlement of pension obligations (1) (2) — — — — Net periodic expense (income) $ 1 $ (2) $ 6 $ 4 $ 4 $ 5 The following table summarizes the pre-tax amounts recorded in OCI related to the Company’s Retirement Plans for the years ended December 31: Pension Plans Other Retirement Plans 2024 2023 2022 2024 2023 2022 Amortization of net actuarial (gains) losses and prior service credit $ (1) $ (1) $ 3 $ (1) $ (1) $ — (Gain) loss on settlement of pension obligations (1) (2) — — — — Net actuarial gain (loss) arising during the period 22 (3) (19) 4 1 13 Total recognized in OCI – pre-tax $ 20 $ (6) $ (16) $ 3 $ — $ 13 ADDITIONAL INFORMATION: Assumptions—Retirement Plans Weighted-average assumptions used to determine benefit obligations at December 31: Pension Plans Other Retirement Plans 2024 2023 2024 2023 Discount rate 5.43 % 4.73 % 5.40 % 4.75 % Rate of compensation increase 3.60 % 3.60 % — — Cash balance plan interest crediting rate 4.78 % 4.50 % — — Weighted-average assumptions used to determine net periodic benefit expense for years ended December 31: Pension Plans Other Retirement Plans 2024 2023 2022 2024 2023 2022 Discount rate 4.73 % 4.93 % 2.60 % 4.75 % 4.90 % 2.65 % Expected return on plan assets 6.10 % 6.55 % 5.05 % — — — Rate of compensation increase 3.60 % 3.63 % 3.63 % — — — Cash balance plan interest crediting rate 4.50 % 4.50 % 4.50 % — — — The expected rate of return on plan assets represents the Company’s best estimate of the long-term return on plan assets and is determined by using a building block approach, which generally weighs the underlying long-term expected rate of return for each major asset class based on their respective allocation target within the plan portfolio, net of plan paid expenses. As the assumption reflects a long-term time horizon, the plan performance in any one particular year does not, by itself, significantly influence the Company’s evaluation. For 2024, the expected rate of return used in calculating the net periodic benefit costs was 6.10%. For 2025, the Company’s expected rate of return assumption is 6.60% to reflect the Company’s current view of long-term capital market outlook. Plan Assets Moody’s investment objective for the assets in the funded pension plan is to earn total returns that will minimize future contribution requirements over the long-term within a prudent level of risk. The Company works with its independent investment consultants to determine asset allocation targets for its pension plan investment portfolio based on its assessment of business and financial conditions, demographic and actuarial data, funding characteristics, and related risk factors. Other relevant factors, including historical and forward looking views of inflation and capital market returns, are also considered. Risk management practices include monitoring plan asset performance, diversification across asset classes and investment styles and periodic rebalancing toward asset allocation targets. The Company’s Asset Management Committee is responsible for overseeing the investment activities of the plan, which includes selecting acceptable asset classes, defining allowable ranges of holdings by asset class and by individual investment managers, defining acceptable securities within each asset class, and establishing investment performance expectations. Ongoing monitoring of the plan includes reviews of investment performance and managers on a regular basis, annual liability measurements, and periodic asset/liability studies. The Company’s investment policy uses risk-controlled investment strategies by increasing the plan’s asset allocation to fixed income securities and specifying ranges of acceptable target allocation by asset class based on different levels of the plan’s accounting funded status. In addition, the investment policy also requires the investment-grade fixed income assets to be rebalanced between shorter and longer duration bonds as the interest rate environment changes. This investment policy is designed to help protect the plan’s funded status and to limit volatility of the Company’s contributions. Based on the policy, the Company’s current target asset allocation is approximately 35% (range of 23% to 46%) in equity securities, 61% (range of 44% to 77%) in fixed income securities and 5% (range of 2% to 8%) in other investments and the plan will use a combination of active and passive investment strategies and different investment styles for its investment portfolios within each asset class. The plan’s equity investments are diversified across U.S. and non-U.S. stocks of small, medium and large capitalization. The plan’s fixed income investments are diversified principally across U.S. and non-U.S. government and corporate bonds, which are expected to help reduce plan exposure to interest rate variation and to better align assets with obligations. The plan also invests in other fixed income investments such as debts rated below investment grade, emerging market debt, and convertible securities. The plan’s other investment, which is made through a private real estate debt fund, is expected to provide additional diversification benefits and absolute return enhancement to the plan assets. Fair value of the assets in the Company’s funded pension plan by asset category at December 31, 2024 and 2023 are as follows: Fair Value Measurement as of December 31, 2024 Asset Category Balance Level 1 Level 2 Measured using NAV practical expedient (1) % of total Cash and cash equivalents $ 2 $ — $ 2 $ — — % Common/collective trust funds—equity securities U.S. large-cap 114 — 114 — 25 % U.S. small and mid-cap 25 — 25 — 5 % Total equity investments 139 — 139 — 30 % Emerging markets bond fund 30 — — 30 7 % Common/collective trust funds and corporate bonds—fixed income securities Intermediate-term investment grade U.S. government/ corporate bonds 57 — 57 — 12 % Mutual funds Long duration corporate bonds 146 — 146 — 32 % U.S. Treasury Inflation-Protected Securities (TIPs) 26 26 — — 6 % Emerging markets equity mutual fund 21 — 21 — 5 % Private investment fund—high yield securities 15 — — 15 3 % Total fixed-income investments 295 26 224 45 65 % Other investment—private real estate fund 24 — — 24 5 % Total Assets $ 460 $ 26 $ 365 $ 69 100 % Fair Value Measurement as of December 31, 2023 Asset Category Balance Level 1 Level 2 Measured using NAV practical expedient (1) % of total Cash and cash equivalents $ 5 $ — $ 5 $ — 1 % Common/collective trust funds—equity securities U.S. large-cap 106 — 106 — 24 % U.S. small and mid-cap 21 — 21 — 5 % Emerging markets 20 — 20 — 4 % Total equity investments 147 — 147 — 33 % Emerging markets bond fund 29 — — 29 6 % Common/collective trust funds and corporate bonds—fixed income securities Intermediate-term investment grade U.S. government/ corporate bonds 60 — 60 — 13 % Mutual funds Long duration corporate bonds 144 — 144 — 32 % U.S. Treasury Inflation-Protected Securities (TIPs) 25 25 — — 6 % Private investment fund—high yield securities 14 — — 14 3 % Total fixed-income investments 272 25 204 43 60 % Other investment—private real estate debt fund 25 — — 25 6 % Total Assets $ 449 $ 25 $ 356 $ 68 100 % (1) Investments are measured using the net asset value per share (or its equivalent) practical expedient and have not been categorized in the fair value hierarchy. The fair value amounts presented in the table are intended to permit a reconciliation of the fair value hierarchy to the value of the total plan assets. Cash and cash equivalents are primarily comprised of investments in money market mutual funds. In determining fair value, Level 1 investments are valued based on quoted market prices in active markets. Investments in common/collective trust and private mutual funds are valued using the NAV per unit in each fund. The NAV is based on the value of the underlying investments owned by each fund, minus its liabilities, and then divided by the number of shares outstanding. Common/collective trust funds and the private mutual fund are categorized in Level 2 to the extent that they are considered to have a readily determinable fair value. Investments for which fair value is estimated by using the NAV per share (or its equivalent) as a practical expedient are not categorized in the fair value hierarchy. Except for the Company’s U.S. funded pension plan, all of Moody’s Retirement Plans are unfunded and therefore have no plan assets. Cash Flows The Company did not contribute to its U.S. funded pension plan during the years ended December 31, 2024 and 2023, and does not anticipate making a contribution to the funded plan in 2025. For its unfunded plans, actual contributions in 2024 were not material and expected payments in 2025 are not expected to be material. Estimated Future Benefits Payable Estimated future benefits payments for the Retirement Plans are as follows as of the year ended December 31, 2024: Year Ending December 31, Pension Plans Other Retirement Plans 2025 $ 28 $ 2 2026 28 2 2027 30 3 2028 31 3 2029 32 3 2030 - 2034 174 19 Defined Contribution Plans Moody’s has a Profit Participation Plan covering substantially all U.S. employees. The Profit Participation Plan provides for an employee salary deferral and the Company matches employee contributions, equal to 50% of employee contribution up to a maximum of 3% of the employee’s pay. Effective January 1, 2008, all new hires are automatically enrolled in the Profit Participation Plan when they meet eligibility requirements unless they decline participation. As the Company’s U.S. DBPPs are closed to new entrants effective January 1, 2008, all eligible new hires will instead receive a retirement contribution into the Profit Participation Plan in value similar to the pension benefits. Additionally, effective January 1, 2008, the Company implemented a deferred compensation plan in the U.S., which is unfunded and provides for employee deferral of compensation and Company matching contributions related to compensation in excess of the IRS limitations on benefits and contributions under qualified retirement plans. Total expenses associated with U.S. defined contribution plans were $73 million, $71 million and $35 million in the years ended December 31, 2024, 2023 and 2022, respectively. Effective January 1, 2008, Moody’s has designated the Moody’s Stock Fund, an investment option under the Profit Participation Plan, as an Employee Stock Ownership Plan and, as a result, participants in the Moody’s Stock Fund may receive dividends in cash or may reinvest such dividends into the Moody’s Stock Fund. Dividend payments relating to the Moody’s Stock Fund were immaterial in each of the years ended December 31, 2024, 2023, and 2022. The Company records the dividends as a reduction of retained earnings in the Consolidated Statements of Shareholders’ Equity. The Moody’s Stock Fund held approximately 304,076 and 315,400 shares of Moody’s common stock at December 31, 2024 and 2023, respectively. Non-U.S. Plans

STOCK-BASED COMPENSATION PLANS

STOCK-BASED COMPENSATION PLANS	12 Months Ended
	Dec. 31, 2024
Share-Based Payment Arrangement [Abstract]
STOCK-BASED COMPENSATION PLANS	STOCK-BASED COMPENSATION PLANS Under the 1998 Plan, 33.0 million shares of the Company’s common stock have been reserved for issuance. The 2001 Plan, which is shareholder approved, permits the granting of up to 54.6 million shares, of which not more than 10.7 million shares are available for grants of awards other than stock options. The stock plans also provide for the granting of restricted stock. The stock plans provide that options are exercisable not later than ten years from the grant date. The vesting period for awards under the stock plans is generally determined by the Board at the date of the grant and has been four years except for employees who are at or near retirement eligibility, as defined, for which vesting is between one two The Company maintains the Directors’ Plan for its Board, which permits the granting of awards in the form of non-qualified stock options, restricted stock or performance shares. The vesting period is determined by the Board at the date of the grant and is generally one year for both options and restricted stock. Under the Directors’ Plan, 1.7 million shares of common stock were reserved for issuance. Any director of the Company who is not an employee of the Company or any of its subsidiaries as of the date that an award is granted is eligible to participate in the Directors’ Plan. Presented below is a summary of the stock-based compensation expense and associated tax benefit in the accompanying consolidated statements of operations: Year Ended December 31, 2024 2023 2022 Stock-based compensation expense $ 221 $ 193 $ 169 Tax benefit $ 48 $ 45 $ 41 The fair value of each employee stock option award is estimated on the date of grant using the Black-Scholes option-pricing model that uses the assumptions noted below. The expected dividend yield is derived from the annual dividend rate on the date of grant. The expected stock volatility is based on an assessment of historical weekly stock prices of the Company as well as implied volatility from Moody’s traded options. The risk-free interest rate is based on U.S. government zero coupon bonds with maturities similar to the expected holding period. The expected holding period is determined by examining historical and projected post-vesting exercise behavior activity. The following weighted average assumptions were used for options granted: Year Ended December 31, 2024 2023 2022 Expected dividend yield 0.91 % 1.04 % 0.86 % Expected stock volatility 28 % 29 % 27 % Risk-free interest rate 4.34 % 4.19 % 1.91 % Expected holding period (in years) 5.9 5.8 5.6 Grant date fair value $ 120.42 $ 94.71 $ 84.00 A summary of option activity as of December 31, 2024 and changes during the year then ended is presented below: Options Shares Weighted Average Exercise Price Per Share Weighted Average Remaining Contractual Term Aggregate Intrinsic Value Outstanding, December 31, 2023 0.8 $ 212.29 Granted 0.2 $ 372.52 Exercised (0.3) $ 173.64 Outstanding, December 31, 2024 0.7 $ 267.64 5.9 years $ 140 Vested and expected to vest, December 31, 2024 0.7 $ 267.26 5.9 years $ 139 Exercisable, December 31, 2024 0.4 $ 207.94 4.0 years $ 99 The aggregate intrinsic value in the table above represents the total pre-tax intrinsic value (the difference between Moody’s closing stock price on the last trading day of the year ended December 31, 2024 and the exercise prices, multiplied by the number of in-the-money options) that would have been received by the option holders had all option holders exercised their options as of December 31, 2024. This amount varies based on the fair value of Moody’s stock. As of December 31, 2024, there was $12 million of total unrecognized compensation expense related to options. The expense is expected to be recognized over a weighted average period of 1.9 years. The following table summarizes information relating to stock option exercises: Year Ended December 31, 2024 2023 2022 Proceeds from stock option exercises $ 53 $ 32 $ 8 Aggregate intrinsic value $ 76 $ 58 $ 9 Tax benefit realized upon exercise $ 13 $ 14 $ 2 A summary of nonvested restricted stock activity for the year ended December 31, 2024 is presented below: Nonvested Restricted Stock Shares Weighted Average Grant Date Fair Value Per Share Balance, December 31, 2023 1.3 $ 300.39 Granted 0.6 $ 373.54 Vested (0.5) $ 300.20 Forfeited (0.1) $ 327.53 Balance, December 31, 2024 1.3 $ 330.84 As of December 31, 2024, there was $234 million of total unrecognized compensation expense related to nonvested restricted stock. The expense is expected to be recognized over a weighted average period of 2.4 years. The following table summarizes information relating to the vesting of restricted stock awards: Year Ended December 31, 2024 2023 2022 Fair value of shares vested $ 199 $ 164 $ 180 Tax benefit realized upon vesting $ 48 $ 40 $ 42 A summary of performance-based restricted stock activity for the year ended December 31, 2024 is presented below: Performance-based restricted stock Shares Weighted Average Grant Date Fair Value Per Share Balance, December 31, 2023 0.3 $ 308.12 Granted 0.1 $ 354.67 Vested (0.1) $ 331.60 Balance, December 31, 2024 0.3 $ 330.78 The following table summarizes information relating to the vesting of the Company’s performance-based restricted stock awards: Year Ended December 31, 2024 2023 2022 Fair value of shares vested $ 40 $ 24 $ 50 Tax benefit realized upon vesting $ 9 $ 3 $ 7 As of December 31, 2024, there was $56 million of total unrecognized compensation expense related to this plan. The expense is expected to be recognized over a weighted average period of 2.0 years. The Company has a policy of issuing treasury stock to satisfy shares issued under stock-based compensation plans. In addition, the Company also sponsors the ESPP. Under the ESPP, 6.0 million shares of common stock were reserved for issuance. The ESPP permits eligible employees to purchase common stock of the Company on a monthly basis at a discount to the average of the high and the low trading prices on the New York Stock Exchange on the last trading day of each month. This discount was 5% in 2024, 2023, and 2022, resulting in the ESPP qualifying for non-compensatory status under ASC Topic 718. Accordingly, no compensation expense was recognized for the ESPP in 2024, 2023, and 2022. The employee purchases are funded through after-tax payroll deductions, which plan participants can elect from one percent to ten percent of compensation, subject to the annual federal limit.

INCOME TAXES

INCOME TAXES	12 Months Ended
	Dec. 31, 2024
Income Tax Disclosure [Abstract]
INCOME TAXES	INCOME TAXES Components of the Company’s income tax provision are as follows: Year Ended December 31, 2024 2023 2022 Current: Federal $ 280 $ 76 $ 106 State and Local 106 67 17 Non-U.S. 316 222 215 Total current 702 365 338 Deferred: Federal (21) (14) 57 State and Local (6) (4) 10 Non-U.S. (35) (20) (19) Total deferred (62) (38) 48 Total provision for income taxes $ 640 $ 327 $ 386 A reconciliation of the U.S. federal statutory tax rate to the Company’s ETR on income before provision for income taxes is as follows: Year Ended December 31, 2024 2023 2022 U.S. statutory tax rate 21.0 % 21.0 % 21.0 % State and local taxes, net of federal tax benefit 3.7 % 2.5 % 0.8 % Foreign operations (0.3) % 0.4 % (0.2) % Release of UTP reserves (0.4) % (5.7) % — % Other (0.3) % (1.3) % 0.3 % ETR 23.7 % 16.9 % 21.9 % Income tax paid $ 613 $ 344 $ 488 The decrease in the ETR in 2023 resulted primarily from the favorable resolution of uncertain tax positions in various U.S. and non-U.S. jurisdictions. The source of income before provision for income taxes is as follows: Year Ended December 31, 2024 2023 2022 U.S. $ 1,446 $ 892 $ 804 Non-U.S. 1,253 1,043 956 Income before provision for income taxes $ 2,699 $ 1,935 $ 1,760 The components of deferred tax assets and liabilities are as follows: December 31, 2024 2023 Deferred tax assets: Account receivable allowances $ 10 $ 9 Accumulated depreciation and amortization 9 19 Stock-based compensation 60 60 Accrued compensation and benefits 50 53 Capitalized costs 20 25 Operating lease liabilities 84 103 Deferred revenue 211 200 Net operating loss 58 38 Restructuring 6 7 Uncertain tax positions 33 29 Self-insured related reserves 7 6 Interest expense carryforward 20 8 Other 12 5 Total deferred tax assets 580 562 Deferred tax liabilities: Accumulated depreciation and amortization of intangible assets and capitalized software (522) (551) ROU Assets (56) (67) Capital gains (13) (20) Self-insured related income (7) (6) Deferred tax on unremitted foreign earnings (20) (14) Gain on net investment hedges - OCI (82) (5) Other (11) (19) Total deferred tax liabilities (711) (682) Net deferred tax liabilities (131) (120) Valuation allowance (25) (24) Total net deferred tax liabilities $ (156) $ (144) On December 22, 2017, the Tax Act was signed into law, which resulted in significant changes to U.S. corporate tax laws. The Tax Act includes a mandatory one-time deemed repatriation tax (“transition tax”) on previously untaxed accumulated earnings of foreign subsidiaries and beginning in 2018 reduced the statutory federal corporate income tax rate from 35% to 21%. Accordingly, the Company determined the transition tax to be $236 million, with the remaining balance due of $12 million as of December 31, 2024. As a result of the Tax Act, all previously net undistributed foreign earnings have now been subject to U.S. tax. The Company regularly evaluates which entities it will indefinitely reinvest earnings. The Company has provided deferred taxes for those entities whose earnings are not considered indefinitely reinvested. The Company’s annual tax expense for the year ended December 31, 2024 includes excess tax benefits from stock-based compensation of $27 million, the favorable resolution of certain U.S. and non-U.S. UTPs of $11 million, and other net decreases to tax positions of $2 million. The Company had valuation allowances of $25 million and $24 million at December 31, 2024 and 2023, respectively, related to foreign net operating losses for which realization is uncertain. A reconciliation of the beginning and ending amount of UTPs is as follows: Year Ended December 31, 2024 2023 2022 Balance as of January 1 $ 196 $ 322 $ 388 Additions for tax positions related to the current year 33 21 12 Additions for tax positions of prior years 11 3 12 Reductions for tax positions of prior years (11) (17) (27) Settlements with taxing authorities (3) (108) (30) Lapse of statute of limitations (15) (25) (33) Balance as of December 31 $ 211 $ 196 $ 322 Moody’s Corporation and subsidiaries are subject to U.S. federal income tax as well as income tax in various state, local and multiple foreign jurisdictions. The Company’s U.S. federal income tax returns for 2021 through 2023 remain open to examination. The Company’s New York City tax returns for 2018 through 2022 are currently under examination and 2023 is open for examination. The Company’s U.K. tax returns from 2017 to 2023 remain open to examination. As of December 31, 2024, the Company had $211 million of UTPs. Given the number of years and nature of matters that remain subject to examination in various tax jurisdictions both in the U.S. and internationally, the Company is unable to estimate a range of possible changes to its UTPs for 2025. It is also possible that new issues might be raised by tax authorities which might necessitate increases to the balance of UTPs. As the Company is unable to predict the timing of conclusion of these audits, the Company is unable to estimate the amount of changes to the balance of UTPs at this time. However, the Company believes that it has adequately provided for its financial exposure relating to all open tax years, by tax jurisdiction, in accordance with ASC Topic 740. The Company classifies interest related to UTPs in interest expense in its consolidated statements of operations. Penalties, if incurred, are recognized in other non-operating (expense) income, net. Refer to Note 16 for disclosure of interest (expense) income relating to UTPs and other tax-related liabilities. As of December 31, 2024, 2023 and 2022 the amount of accrued interest recorded in the Company’s consolidated balance sheets related to UTPs was $47 million, $36 million and $47 million, respectively. In August 2022, the U.S. Congress passed the Inflation Reduction Act, which included a corporate minimum tax on book earnings of 15%, an excise tax on corporate share repurchases of 1%, and certain climate change and energy tax credit incentives. The adoption of a corporate minimum tax of 15% did not have a significant impact on Moody’s ETR. The excise tax of 1% on corporate share buybacks is recorded to shareholders' equity and does not have an impact on the Company’s ETR. Effective in 2024, multiple foreign jurisdictions in which the Company operates have enacted legislation to adopt a minimum tax rate described in the Global Anti-Base Erosion tax model rules (referred to as GloBE or Pillar II) issued by the OECD. A minimum ETR of 15% would apply to multinational companies with consolidated revenue above €750 million. Under the GloBE rules, a company would be required to determine a combined ETR for all entities located in a jurisdiction. If the jurisdictional tax rate is less than 15%, an additional tax generally will be due to bring the jurisdictional effective tax rate up to 15%. As of December 31, 2024, the Pillar II minimum tax did not have a material impact on the Company's full year results of operations or financial position.

INDEBTEDNESS

INDEBTEDNESS	12 Months Ended
	Dec. 31, 2024
Debt Disclosure [Abstract]
INDEBTEDNESS	INDEBTEDNESS The Company’s debt is recorded at its carrying amount, which represents the issuance amount plus or minus any issuance premium or discount, except for certain debt as depicted in the table below, which is recorded at the carrying amount adjusted for the fair value of an interest rate swap used to hedge the fair value of the note. The following table summarizes total indebtedness: December 31, 2024 Notes Payable: Principal Amount Fair Value of Interest Rate Swaps (1) Unamortized (Discount) Premium Unamortized Debt Issuance Costs Carrying Value 5.25% 2014 Senior Notes, due 2044 $ 600 $ (32) $ 3 $ (4) $ 567 1.75% 2015 Senior Notes, due 2027 518 — — (1) 517 3.25% 2017 Senior Notes, due 2028 500 (13) (2) (1) 484 4.25% 2018 Senior Notes, due 2029 400 (35) (1) (1) 363 4.875% 2018 Senior Notes, due 2048 400 (35) (6) (3) 356 0.950% 2019 Senior Notes, due 2030 776 — (1) (3) 772 3.75% 2020 Senior Notes, due 2025 700 (3) — — 697 3.25% 2020 Senior Notes, due 2050 300 — (4) (3) 293 2.55% 2020 Senior Notes, due 2060 300 — (2) (3) 295 2.00% 2021 Senior Notes, due 2031 600 — (6) (4) 590 2.75% 2021 Senior Notes, due 2041 600 — (12) (5) 583 3.10% 2021 Senior Notes, due 2061 500 — (7) (5) 488 3.75% 2022 Senior Notes, due 2052 500 (43) (8) (5) 444 4.25% 2022 Senior Notes, due 2032 500 (8) (2) (3) 487 5.00% 2024 Senior Notes, due 2034 500 — (4) (4) 492 Total debt $ 7,694 $ (169) $ (52) $ (45) $ 7,428 Current portion (697) Total long-term debt $ 6,731 December 31, 2023 Notes Payable: Principal Amount Fair Value of Interest Rate Swaps (1) Unamortized (Discount) Premium Unamortized Debt Issuance Costs Carrying Value 5.25% 2014 Senior Notes, due 2044 $ 600 $ (34) $ 3 $ (4) $ 565 1.75% 2015 Senior Notes due 2027 552 — — (1) 551 3.25% 2017 Senior Notes, due 2028 500 (26) (2) (2) 470 4.25% 2018 Senior Notes, due 2029 400 (34) (2) (2) 362 4.875% 2018 Senior Notes, due 2048 400 (36) (6) (3) 355 0.950% 2019 Senior Notes, due 2030 829 — (2) (4) 823 3.75% 2020 Senior Notes, due 2025 700 (16) (1) (1) 682 3.25% 2020 Senior Notes, due 2050 300 — (4) (3) 293 2.55% 2020 Senior Notes, due 2060 300 — (2) (3) 295 2.00% 2021 Senior Notes, due 2031 600 — (6) (4) 590 2.75% 2021 Senior Notes, due 2041 600 — (12) (5) 583 3.10% 2021 Senior Notes, due 2061 500 — (7) (5) 488 3.75% 2022 Senior Note, due 2052 500 (29) (8) (5) 458 4.25% 2022 Senior Note, due 2032 500 (8) (2) (4) 486 Total long-term debt $ 7,281 $ (183) $ (51) $ (46) $ 7,001 (1) The fair value of interest rate swaps in the tables above represents the cumulative amount of fair value hedging adjustments included in the carrying amount of the hedged debt. Credit Facility On May 6, 2024, the Company entered into a five-year senior, unsecured revolving credit facility with the capacity to borrow up to $1.25 billion, which expires in May 2029. The 2024 Credit Facility replaces the Company's $1.25 billion 2021 Credit Facility that was scheduled to mature in December 2026. Further information on the key terms of these revolving credit facilities is below: December 31, 2024 December 31, 2023 Issue Date Capacity Maturity Drawn Undrawn Drawn Undrawn 2021 Credit Facility December 17, 2021 $ 1,250 December 17, 2026 (Terminated in 2024) $ — $ — $ — $ 1,250 2024 Credit Facility May 6, 2024 $ 1,250 May 6, 2029 $ — $ 1,250 $ — $ — Interest on borrowings under the 2024 Credit Facility is payable at rates that are based on an adjusted term SOFR Rate plus a premium that can range from 80.5 BPS to 122.5 BPS, depending on the Company’s index debt ratings, as set forth in the 2024 Credit Facility. The Company also has the option to choose other rates, such as those based on adjusted Daily Simple SOFR or an alternate base rate, as set forth in the 2024 Credit Facility. Regardless of borrowing activity under the 2024 Credit Facility, the Company pays quarterly fees for the 2024 Credit Facility that can range from 7 BPS of the 2024 Credit Facility amount to 15 BPS, depending on the Company’s index debt ratings. The 2024 Credit Facility contains certain customary covenants and also contains a financial covenant that requires the Company to maintain a total debt to EBITDA Ratio of (i) not more than 4 to 1 at the end of any fiscal quarter or (ii) not more than 4.5 to 1 as of the end of the first three consecutive quarters immediately following any acquisition with consideration in excess of $500 million, subject to certain conditions as set forth in the 2024 Credit Facility. Commercial Paper On August 3, 2016, the Company entered into a private placement commercial paper program under which the Company may issue CP notes up to a maximum amount of $1.0 billion. Borrowings under the CP Program are backstopped by the 2024 Credit Facility. Amounts under the CP Program may be re-borrowed. The maturity of the CP Notes will vary, but may not exceed 397 days from the date of issue. The CP Notes are sold at a discount from par, or alternatively, sold at par and bear interest at rates that will vary based upon market conditions. The rates of interest will depend on whether the CP Notes will be a fixed or floating rate. The interest on a floating rate may be based on the following: (a) certificate of deposit rate; (b) commercial paper rate; (c) the federal funds rate; (d) the SOFR; (e) prime rate; (f) Treasury rate; or (g) such other base rate as may be specified in a supplement to the private placement agreement. The CP Program contains certain events of default including, among other things: non-payment of principal, interest or fees; entrance into any form of moratorium; and bankruptcy and insolvency events, subject in certain instances to cure periods. As of December 31, 2024, the Company has no CP borrowings outstanding. Notes Payable At December 31, 2024, the Company was in compliance with all covenants contained within all of the debt agreements. All of the debt agreements contain cross default provisions which state that default under one of the aforementioned debt instruments could in turn permit lenders under other debt instruments to declare borrowings outstanding under those instruments to be immediately due and payable. As of December 31, 2024, there were no such cross defaults. The repayment schedule for the Company’s borrowings is as follows: Year Ending December 31, Total 2025 $ 700 2026 — 2027 518 2028 500 2029 400 Thereafter 5,576 Total $ 7,694 Interest expense, net The following table summarizes the components of interest as presented in the consolidated statements of operations and the cash paid for interest: Year Ended December 31, 2024 2023 2022 Expense on borrowings (1) $ (300) $ (296) $ (216) (Expense) income on UTPs and other tax related liabilities (2) (13) 8 (13) Net periodic pension costs - interest component (26) (26) (17) Income 102 63 15 Interest expense, net $ (237) $ (251) $ (231) Interest paid (3) $ 280 $ 281 $ 198 (1) Expense on borrowings includes interest on long-term debt, as well as realized gains/losses related to interest rate swaps and cross currency swaps, which are more fully discussed in Note 6. (2) The amount for the year ended December 31, 2023 includes a $22 million reduction of tax-related interest expense primarily related to the resolutions of tax matters. (3) Interest paid includes net settlements on interest rate swaps more fully discussed in Note 6. The fair value and carrying value of the Company’s debt as of December 31, 2024 and 2023 are as follows: December 31, 2024 December 31, 2023 Carrying Amount Estimated Fair Value Carrying Amount Estimated Fair Value Total debt $ 7,428 $ 6,601 $ 7,001 $ 6,402 The fair value of the Company’s debt is estimated based on quoted prices in active markets as of the reporting date, which are considered Level 1 inputs within the fair value hierarchy.

CAPITAL STOCK

CAPITAL STOCK	12 Months Ended
	Dec. 31, 2024
Stockholders' Equity Note [Abstract]
CAPITAL STOCK	CAPITAL STOCK Authorized Capital Stock The total number of shares of all classes of stock that the Company has authority to issue under its Restated Certificate of Incorporation is 1.02 billion shares with a par value of $0.01, of which 1.0 billion are shares of common stock, 10.0 million are shares of preferred stock and 10.0 million are shares of series common stock. The preferred stock and series common stock can be issued with varying terms, as determined by the Board. Share Repurchase Program The Company first implemented a systematic share repurchase program in the third quarter of 2005 through an SEC Rule 10b5-1 program and has maintained its program since. Moody’s may also purchase opportunistically when conditions warrant. As a result, Moody’s share repurchase activity will continue to vary from quarter to quarter. The table below summarizes the Company’s remaining authority under its share repurchase program as of December 31, 2024: Date Authorized Amount Authorized Remaining Authority October 15, 2024 $ 1,500 $ 1,500 February 5, 2024 1,000 67 Total Remaining Authority at December 31, 2024 $ 1,567 During 2024, Moody’s repurchased 2.9 million shares of its common stock under its share repurchase program and issued a net 0.7 million shares under employee stock-based compensation plans. The net amount includes shares withheld for employee payroll taxes. Dividends The Company’s cash dividends were: Dividends Per Share Year ended December 31, 2024 2023 2022 Declared Paid Declared Paid Declared Paid First quarter $ 0.85 $ 0.85 $ 0.77 $ 0.77 $ 0.70 $ 0.70 Second quarter 0.85 0.85 0.77 0.77 0.70 0.70 Third quarter 0.85 0.85 0.77 0.77 0.70 0.70 Fourth quarter 0.85 0.85 0.77 0.77 0.70 0.70 Total $ 3.40 $ 3.40 $ 3.08 $ 3.08 $ 2.80 $ 2.80 On February 12, 2025, the Board approved the declaration of a quarterly dividend of $0.94 per share of Moody’s common stock, payable on March 14, 2025 to shareholders of record at the close of business on February 25, 2025. The continued payment of dividends at the rate noted above, or at all, is subject to the discretion of the Board.

LEASES

LEASES	12 Months Ended
	Dec. 31, 2024
Leases [Abstract]
LEASES	LEASES The Company has operating leases, substantially all of which relate to the lease of office space. The Company's leases which are classified as finance leases are not material to the consolidated financial statements. Certain of the Company's leases include options to renew, with renewal terms that can extend the lease term from one year to 20 years at the Company's discretion. The following table presents the components of the Company’s lease cost: Year ended December 31, 2024 2023 2022 Operating lease cost $ 88 $ 93 $ 102 Sublease income (7) (7) (7) Variable lease cost 22 22 20 Total lease cost $ 103 $ 108 $ 115 During 2023 and 2022, the Company recorded charges of $32 million and $23 million, respectively, related to the exit of certain real estate leases that resulted in ROU Asset impairment. The charges were recorded within restructuring expense in the consolidated statements of operations. Refer to Note 9 for further details. The following tables present other information related to the Company’s operating leases: Year ended December 31, 2024 2023 2022 Cash paid for amounts included in the measurement of operating lease liabilities $ 120 $ 119 $ 118 Right-of-use assets obtained in exchange for new operating lease liabilities $ 21 $ 40 $ 35 December 31, 2024 2023 2022 Weighted-average remaining lease term (in years) 3.8 4.4 4.9 Weighted-average discount rate applied to operating leases 3.2 % 3.2 % 3.1 % The following table presents a maturity analysis of the future minimum lease payments included within the Company’s operating lease liabilities at December 31, 2024: Year Ending December 31, Operating Leases 2025 $ 111 2026 91 2027 74 2028 23 2029 19 Thereafter 20 Total lease payments (undiscounted) 338 Less: Interest 20 Present value of lease liabilities: $ 318 Lease liabilities - current $ 102 Lease liabilities - noncurrent $ 216 As of December 31, 2024, the Company has entered into an additional operating lease that has not yet commenced, with a lease obligation of approximately $140 million related to the lease of office space. Accordingly, the ROU Assets and operating lease liabilities at December 31, 2024 do not reflect the amounts for this lease. This operating lease will commence in 2025 with a lease term of 15 years.

CONTINGENCIES

CONTINGENCIES	12 Months Ended
	Dec. 31, 2024
Commitments and Contingencies Disclosure [Abstract]
CONTINGENCIES	CONTINGENCIES Given the nature of the Company's activities, Moody’s and its subsidiaries are subject to legal and tax proceedings, governmental, regulatory and legislative investigations, subpoenas and other inquiries, and claims and litigation by governmental and private parties that are based on ratings assigned by MIS or that are otherwise incidental to the Company’s business. Moody’s and MIS also are subject to periodic reviews, inspections, examinations and investigations by regulators in the U.S. and other jurisdictions, any of which may result in claims, legal proceedings, assessments, fines, penalties or restrictions on business activities. On September 3, 2024, MIS settled charges by the SEC for failure to comply with record preservation requirements applicable to MIS. The settlement followed an investigation relating to certain business communications sent over electronic messaging channels that had not been approved by MIS. The SEC has settled similar charges with other NRSROs and other registrants subject to record preservation requirements. The terms of MIS’s settlement included the payment of a $20 million civil monetary penalty. As previously disclosed, the Company had accrued that amount in its consolidated financial statements. Moody’s also is subject to ongoing tax audits as addressed in Note 15 to the consolidated financial statements. Management periodically assesses the Company’s liabilities and contingencies in connection with these matters based upon the latest information available. For claims, litigation and proceedings and governmental investigations and inquiries not related to income taxes, the Company records liabilities in the consolidated financial statements when it is both probable that a liability has been incurred and the amount of loss can be reasonably estimated and periodically adjusts these as appropriate. When the reasonable estimate of the loss is within a range of amounts, the minimum amount of the range is accrued unless some higher amount within the range is a better estimate than another amount within the range. In instances when a loss is reasonably possible but uncertainties exist related to the probable outcome and/or the amount or range of loss, management does not record a liability but discloses the contingency if material. As additional information becomes available, the Company adjusts its assessments and estimates of such matters accordingly. Moody’s also discloses material pending legal proceedings pursuant to SEC rules and other pending matters as it may determine to be appropriate. In view of the inherent difficulty of assessing the potential outcome of legal proceedings, governmental, regulatory and legislative investigations and inquiries, claims and litigation and similar matters and contingencies, particularly when the claimants seek large or indeterminate damages or assert novel legal theories or the matters involve a large number of parties, the Company often cannot predict what the eventual outcome of the pending matters will be or the timing of any resolution of such matters. The Company also may be unable to predict the impact (if any) that any such matters may have on how its business is conducted, on its competitive position or on its financial position, results of operations or cash flows. As the process to resolve any pending matters progresses, management will continue to review the latest information available and assess its ability to predict the outcome of such matters and the effects, if any, on its operations and financial condition and to accrue for and disclose such matters as and when required. However, because such matters are inherently unpredictable and unfavorable developments or resolutions can occur, the ultimate outcome of such matters, including the amount of any loss, may differ from those estimates.

SEGMENT INFORMATION

SEGMENT INFORMATION	12 Months Ended
	Dec. 31, 2024
Segment Reporting [Abstract]
SEGMENT INFORMATION	SEGMENT INFORMATION The Company is organized into two operating segments: MA and MIS and accordingly, the Company reports in two reportable segments: MA and MIS. The MA segment develops a wide range of products and services that support the risk management activities of institutional participants in global financial markets. The MA segment consists of three LOBs - DS, R&I, and D&I. The MIS segment consists of five LOBs. The CFG, FIG, PPIF and SFG LOBs generate revenue principally from fees for the assignment and ongoing monitoring of credit ratings on debt obligations and the entities that issue such obligations in markets worldwide. The MIS Other LOB primarily consists of financial instruments pricing services in the Asia-Pacific region, ICRA non-ratings revenue and revenue from providing professional services. Revenue for MA and expenses for MIS include an intersegment fee charged to MIS from MA for certain MA products and services utilized in MIS’s ratings process. Additionally, revenue for MIS and expenses for MA include intersegment fees charged to MA for the rights to use and distribute content, data and products developed by MIS. These intersegment fees are generally based on the market value of the products and services being transferred between the segments. Overhead expenses include costs such as rent and occupancy, information technology and support staff such as finance, human resources and legal. Such costs and corporate expenses that exclusively benefit one segment are fully charged to that segment. For overhead costs and corporate expenses that benefit both segments, costs are generally allocated to each segment based on historical revenue amounts. “Eliminations” in the following table represent intersegment revenue/expense. Moody’s does not report the Company’s assets by reportable segment, as this metric is not used by the chief operating decision maker to allocate resources to the segments. Financial Information by Segment The table below presents revenue, significant expenses regularly provided to the CODM and Adjusted Operating Income by reportable segment. The CODM, identified as the Company's CEO, utilizes the Adjusted Operating Income measure to assess the profitability of the Company and each of its reportable segments each quarter. Adjusted Operating Income is also used in our budgeting and forecasting processes, enabling the allocation of capital resources across the Company's strategic initiatives. Year Ended December 31, 2024 2023 MA MIS Eliminations Consolidated MA MIS Eliminations Consolidated Total external revenue $ 3,295 $ 3,793 $ — $ 7,088 $ 3,056 $ 2,860 $ — $ 5,916 Intersegment revenue 13 193 (206) — 13 186 (199) — Revenue 3,308 3,986 (206) 7,088 3,069 3,046 (199) 5,916 Compensation expense 1,370 1,169 — 2,539 1,238 1,003 — 2,241 Non-compensation expense 731 410 — 1,141 708 370 — 1,078 Intersegment expense 193 13 (206) — 186 13 (199) — Operating, SG&A 2,294 1,592 (206) 3,680 2,132 1,386 (199) 3,319 Adjusted Operating Income 1,014 2,394 — 3,408 937 1,660 — 2,597 Add: Depreciation and amortization 353 78 — 431 298 75 — 373 Restructuring 42 17 — 59 59 28 — 87 Charges related to asset abandonment 43 — — 43 — — — — Operating Income $ 2,875 $ 2,137 Non-operating (expense) income, net $ (176) $ (202) Income before provision for income taxes $ 2,699 $ 1,935 Year Ended December 31, 2022 MA MIS Eliminations Consolidated Total external revenue $ 2,769 $ 2,699 $ — $ 5,468 Intersegment revenue 8 174 (182) — Revenue 2,777 2,873 (182) 5,468 Compensation expense 1,116 940 — 2,056 Non-compensation expense 647 437 — 1,084 Intersegment expense 174 8 (182) — Operating, SG&A 1,937 1,385 (182) 3,140 Adjusted Operating Income 840 1,488 — 2,328 Add: Depreciation and amortization 250 81 — 331 Restructuring 49 65 — 114 Operating income $ 1,883 Non-operating (expense) income, net $ (123) Income before provision for income taxes $ 1,760 The table below shows cumulative restructuring expense incurred through December 31, 2024 by reportable segment. MA MIS Total 2022 - 2023 Geolocation Restructuring Program $ 116 $ 98 $ 214 Strategic and Operational Efficiency Restructuring Program $ 34 $ 11 $ 45 The costs expected to be incurred related to the Strategic and Operational Efficiency Restructuring Program are $125 million to $155 million for the MA segment and $75 million to $95 million for the MIS segment, which include allocations of charges associated with corporate functions. The restructuring programs are more fully discussed in Note 9. CONSOLIDATED REVENUE AND LONG-LIVED ASSETS INFORMATION BY GEOGRAPHIC AREA Year Ended December 31, 2024 2023 2022 Revenue: U.S. $ 3,836 $ 3,071 $ 2,865 Non-U.S.: EMEA 2,174 1,886 1,708 Asia-Pacific 629 570 539 Americas 449 389 356 Total Non-U.S. 3,252 2,845 2,603 Total $ 7,088 $ 5,916 $ 5,468 Long-lived assets at December 31: U.S. $ 4,395 $ 4,323 $ 4,408 Non-U.S. 4,361 4,562 4,489 Total $ 8,756 $ 8,885 $ 8,897

VALUATION AND QUALIFYING ACCOUN

VALUATION AND QUALIFYING ACCOUNTS	12 Months Ended
	Dec. 31, 2024
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]
VALUATION AND QUALIFYING ACCOUNTS	VALUATION AND QUALIFYING ACCOUNTS Accounts receivable allowances represent estimates for uncollectible accounts. The valuation allowance on deferred tax assets relates to foreign net operating tax losses for which realization is uncertain. Below is a summary of activity: Year Ended December 31, Balance at Beginning of the Year Charged to costs and expenses Deductions (1) Balance at End of the Year 2024 Allowances for credit losses $ (35) $ (15) $ 18 $ (32) Deferred tax assets—valuation allowance $ (24) $ (2) $ 1 $ (25) 2023 Allowances for credit losses $ (40) $ (22) $ 27 $ (35) Deferred tax assets—valuation allowance $ (21) $ (2) $ (1) $ (24) 2022 Allowances for credit losses $ (32) $ (25) $ 17 $ (40) Deferred tax assets—valuation allowance $ (18) $ (4) $ 1 $ (21) (1) Reflects write-off of uncollectible accounts receivable or expiration of foreign net operating tax losses.

OTHER NON-OPERATING (EXPENSE) I

OTHER NON-OPERATING (EXPENSE) INCOME, NET	12 Months Ended
	Dec. 31, 2024
Other Income and Expenses [Abstract]
OTHER NON-OPERATING (EXPENSE) INCOME, NET	OTHER STATEMENTS OF OPERATIONS INFORMATION Other non-operating income, net The following table summarizes the components of other non-operating income, net as presented in the consolidated statements of operations: Year Ended December 31, 2024 2023 2022 FX loss (1) $ — $ (30) $ (10) Net periodic pension income - non-service and non-interest cost components 30 35 24 Income/gain from investments in non-consolidated affiliates 15 19 17 Gain on previously held equity method investments (2) 7 — — Gain (loss) on investments 13 14 (14) Other (4) 11 21 Total $ 61 $ 49 $ 38 (1) The amount for the year ended December 31, 2023 includes a $23 million loss recorded pursuant to an immaterial out-of-period adjustment relating to the 2022 fiscal year. The amount for the year ended December 31, 2022 includes FX translation losses of $20 million reclassified to earnings resulting from the Company no longer conducting commercial operations in Russia. (2) The amount for the year ended December 31, 2024 reflects non-cash gains relating to the step-acquisitions of Praedicat and GCR. Charges related to asset abandonment: During the year ended December 31, 2024, the Company recorded charges related to asset abandonment of $43 million pursuant to the Company's decision to outsource the production of certain sustainability content utilized in our product offerings. These charges consist of: i) $12 million related to severance incurred pursuant to a reduction in staff; and ii) $31 million in incremental amortization expense related to the change in estimated useful lives of certain internally developed software and amortizable intangible assets that are associated with the sustainability content offerings for which production is being outsourced.

Pay vs Performance Disclosure

Pay vs Performance Disclosure - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Pay vs Performance Disclosure
Net Income (Loss) Attributable to Parent	$ 2,058	$ 1,607	$ 1,374

Insider Trading Arrangements

Insider Trading Arrangements	3 Months Ended
	Dec. 31, 2024
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

Insider Trading Policies and Pr

Insider Trading Policies and Procedures	12 Months Ended
	Dec. 31, 2024
Insider Trading Policies and Procedures [Line Items]
Insider Trading Policies and Procedures Adopted	true

Cybersecurity Risk Management a

Cybersecurity Risk Management and Strategy Disclosure	12 Months Ended
	Dec. 31, 2024
Cybersecurity Risk Management, Strategy, and Governance [Line Items]
Cybersecurity Risk Management Processes for Assessing, Identifying, and Managing Threats [Text Block]	CYBERSECURITY AND RISK MANAGEMENT Governance Management The Company maintains a dedicated internal cybersecurity team that interacts with executive management and its business units to identify, assess, manage, and respond to cybersecurity risks and incidents relating to the Company’s information systems and operations. In addition, this internal cybersecurity team is responsible for managing detection, mitigation and remediation of cybersecurity incidents. The internal cybersecurity team is managed by the CISO, who reports to the CAO, who is a member of the executive leadership team. At December 31, 2024, the Company’s internal cybersecurity team consisted of members located in various countries and time zones across the world. The team has members with experience in governance, risk management and compliance, threat monitoring, threat emulation, penetration testing and cyber incident management. Team members have both individual responsibilities and a team focus, covering areas such as network, endpoint device, and e-mail security engineering as well as operations and threat management, monitoring, and response. The Cyber Committee, chaired by the CISO, and whose members include the CTSO, CAO and Chief Risk & Resiliency Officer, as well as other members of senior management and the legal team, is responsible for identifying cybersecurity risks and threats, recommending mitigating actions to strengthen cybersecurity resilience, and meeting risk tolerance thresholds established by senior management. The Cyber Committee also validates that the Company has appropriate people, process and technology capabilities to identify, mitigate and report on cybersecurity risks to the executive leadership team and the Board of Directors. The Cyber Committee meets regularly to allow members of the internal cybersecurity team to present concerns and recommendations for decisions on preventing, identifying, mitigating, and remediating risks and threats. To the extent warranted, the Cyber Committee may additionally be convened on an ad hoc basis. The Cyber Committee makes decisions regarding the reporting of cybersecurity concerns to the executive leadership team, who escalate issues to the Board and/or the Audit Committee as necessary. In the case of incidents that arise, the Cyber Committee, under the direction of the Board and/or executive leadership team when appropriate, works to involve all appropriate personnel with the aim of resolving the incident, performing any required remediation/reporting, and taking appropriate steps to comply with applicable laws and regulations. The process that the Cyber Committee follows upon emergence of incidents is documented in the Company’s Incident Response Plan. Additionally, cybersecurity risks and the adequacy of associated mitigations are analyzed by senior leadership as part of the enterprise risk assessments that are reported to and discussed by the Board. The CISO has extensive cybersecurity knowledge and skills, gained from over 20 years’ experience working in regulated industries. The CISO holds a number of cybersecurity related certifications, including the Certified Information Systems Security Professional and Certified Information Security Manager. In addition to the CISO, the CTSO has been a close partner and advocate for cybersecurity at the Company, and is consulted or informed on all decisions or risks that affect the Company's technology systems and/or implicate cybersecurity. The CAO is responsible for overseeing the cybersecurity team at the executive leadership level. Board of Directors and Audit Committee The Board provides oversight of management’s efforts to assess and manage cybersecurity risks and respond to cybersecurity incidents and threats. In addition, the Audit Committee of the Board of Directors regularly receives reports from management regarding the Company’s financial and compliance risks, including, but not limited to, risks relating to internal controls and cybersecurity risks. The Board receives regular updates from the CISO, CTSO, and CAO regarding matters related to technology and cybersecurity. The Company has protocols, as discussed below, by which certain cybersecurity concerns, incidents and threats are escalated within the Company and, where appropriate, reported in a timely manner to the Board. Risk Management and Strategy The objective of the Company's comprehensive cybersecurity program is to assess, identify, and manage risks from cybersecurity incidents and threats. The Company's cybersecurity program leverages the NIST Framework and it incorporates training and awareness coupled with ongoing monitoring and assessment. The cybersecurity program is an important part of the Company’s enterprise risk management (ERM), with the head of the Company’s ERM program (the Chief Risk & Resiliency Officer) sitting on the Cyber Committee, and sets forth a process for escalating certain incidents to the Company’s ERM group integrated into the Company’s Incident Response Plan. As part of the cybersecurity program, the Company’s cybersecurity environment is monitored by automated tools on an ongoing basis and an internal cybersecurity team that reviews threats, alerts, and incidents. The Company’s Incident Response Plan provides governance and guidance in responding to information security incidents and is tested regularly for calibration against existing and emerging threats. The Incident Response Plan describes the process to be followed by the Cyber Committee in connection with the oversight of the cybersecurity environment and specific events that occur from time to time. The cybersecurity program undergoes periodic internal and external reviews. In addition, the Company's Internal Controls Department performs an independent assessment of the design and operating effectiveness of the Company’s network of cybersecurity controls in accordance with the NIST Framework. The results of the assessment are periodically shared with the Cyber Committee. The Company’s cybersecurity environment is also subject to routine vulnerability assessment processes. Internal and external teams, including the Cyber Committee, conduct activities such as penetration testing, red teaming, tabletop exercises and phishing drills. Results are measured and assessed for possible improvements. In addition to these ongoing efforts, the Company has a set of third-party risk management tools through which it monitors for cybersecurity risks and threats associated with its third-party service providers. The Incident Response Plan includes processes that define how the Company manages and responds to such risks or threats associated with its third-party service providers. The Company contracts with reputable third parties to conduct annual external assessments of its cybersecurity program and its components. Government agencies and their contracted agents also conduct periodic reviews in certain jurisdictions where the Company operates. Insurance agents, customers and other market participants routinely assess the Company’s security posture relative to their own standards. Security Policy and Requirements The Company has an Information Security Policy and Information Security Standards, which, taken together, describe the standards and minimum requirements that are expected of all business and information security personnel to protect the Company’s information and technology assets. The policy provides a framework guided by security principles designed to address the confidentiality, integrity and availability of the Company’s information assets in the context of internal, external, deliberate and accidental threats, while supporting the Company’s information creation and sharing needs. The Company is subject to various privacy laws in the jurisdictions where it operates including CCPA and GDPR, as well as U.S. Federal regulation by the FTC, for certain privacy-related aspects of its business, and the Sarbanes-Oxley Act of 2002. The Company is audited in connection with requirements set forth in the Sarbanes-Oxley Act of 2002, and Moody’s Analytics obtains third-party audits in connection with the ISO 27001 certification and SOC 1 and SOC 2 attestation reports, respectively, for certain products. As previously mentioned, the Company also aligns with NIST standards in connection with information security, which it uses to evaluate its cybersecurity readiness and resilience, and is required to make various filings and comply with requirements in certain jurisdictions in which it operates. The Company’s cybersecurity program also includes an information security training and awareness program called InfoSafe for all employees. The program includes annual certification to having read and understood the Company's IT Use Policy, continuing education on phishing awareness, regular communications about cybersecurity best practices, and participation in annual events like Cybersecurity Awareness Month. Employees are expected to complete annual cybersecurity training, and compliance is monitored. The Company uses general and targeted phishing simulations to help employees better recognize and respond to potential threats. The training program is further enhanced by cybersecurity experts speaking at educational events. The Company also offers specialized training modules on emerging cybersecurity threats for its software development teams. The Company’s IT Use Policy outlines a detailed escalation process under which employees are to immediately report any suspected cybersecurity incident. The cybersecurity threat landscape is dynamic and volatile, and requires significant investment on the part of the Company in terms of talent recruitment and retention, as well as procuring and deploying the correct tools to address threats. Additional information on cybersecurity risks is discussed in Item 1A of Part I, “Risk Factors,” under the heading “Technology Risks,” which should be read in conjunction with the foregoing information.
Cybersecurity Risk Management Processes Integrated [Flag]	true
Cybersecurity Risk Management Processes Integrated [Text Block]	The objective of the Company's comprehensive cybersecurity program is to assess, identify, and manage risks from cybersecurity incidents and threats. The Company's cybersecurity program leverages the NIST Framework and it incorporates training and awareness coupled with ongoing monitoring and assessment. The cybersecurity program is an important part of the Company’s enterprise risk management (ERM), with the head of the Company’s ERM program (the Chief Risk & Resiliency Officer) sitting on the Cyber Committee, and sets forth a process for escalating certain incidents to the Company’s ERM group integrated into the Company’s Incident Response Plan. As part of the cybersecurity program, the Company’s cybersecurity environment is monitored by automated tools on an ongoing basis and an internal cybersecurity team that reviews threats, alerts, and incidents. The Company’s Incident Response Plan provides governance and guidance in responding to information security incidents and is tested regularly for calibration against existing and emerging threats. The Incident Response Plan describes the process to be followed by the Cyber Committee in connection with the oversight of the cybersecurity environment and specific events that occur from time to time. The cybersecurity program undergoes periodic internal and external reviews. In addition, the Company's Internal Controls Department performs an independent assessment of the design and operating effectiveness of the Company’s network of cybersecurity controls in accordance with the NIST Framework. The results of the assessment are periodically shared with the Cyber Committee. The Company’s cybersecurity environment is also subject to routine vulnerability assessment processes. Internal and external teams, including the Cyber Committee, conduct activities such as penetration testing, red teaming, tabletop exercises and phishing drills. Results are measured and assessed for possible improvements. In addition to these ongoing efforts, the Company has a set of third-party risk management tools through which it monitors for cybersecurity risks and threats associated with its third-party service providers. The Incident Response Plan includes processes that define how the Company manages and responds to such risks or threats associated with its third-party service providers. The Company contracts with reputable third parties to conduct annual external assessments of its cybersecurity program and its components. Government agencies and their contracted agents also conduct periodic reviews in certain jurisdictions where the Company operates. Insurance agents, customers and other market participants routinely assess the Company’s security posture relative to their own standards.
Cybersecurity Risk Management Third Party Engaged [Flag]	true
Cybersecurity Risk Third Party Oversight and Identification Processes [Flag]	true
Cybersecurity Risk Materially Affected or Reasonably Likely to Materially Affect Registrant [Flag]	false
Cybersecurity Risk Board of Directors Oversight [Text Block]	The Cyber Committee, chaired by the CISO, and whose members include the CTSO, CAO and Chief Risk & Resiliency Officer, as well as other members of senior management and the legal team, is responsible for identifying cybersecurity risks and threats, recommending mitigating actions to strengthen cybersecurity resilience, and meeting risk tolerance thresholds established by senior management. The Cyber Committee also validates that the Company has appropriate people, process and technology capabilities to identify, mitigate and report on cybersecurity risks to the executive leadership team and the Board of Directors. The Cyber Committee meets regularly to allow members of the internal cybersecurity team to present concerns and recommendations for decisions on preventing, identifying, mitigating, and remediating risks and threats. To the extent warranted, the Cyber Committee may additionally be convened on an ad hoc basis. The Cyber Committee makes decisions regarding the reporting of cybersecurity concerns to the executive leadership team, who escalate issues to the Board and/or the Audit Committee as necessary. In the case of incidents that arise, the Cyber Committee, under the direction of the Board and/or executive leadership team when appropriate, works to involve all appropriate personnel with the aim of resolving the incident, performing any required remediation/reporting, and taking appropriate steps to comply with applicable laws and regulations. The process that the Cyber Committee follows upon emergence of incidents is documented in the Company’s Incident Response Plan. Additionally, cybersecurity risks and the adequacy of associated mitigations are analyzed by senior leadership as part of the enterprise risk assessments that are reported to and discussed by the Board. The CISO has extensive cybersecurity knowledge and skills, gained from over 20 years’ experience working in regulated industries. The CISO holds a number of cybersecurity related certifications, including the Certified Information Systems Security Professional and Certified Information Security Manager. In addition to the CISO, the CTSO has been a close partner and advocate for cybersecurity at the Company, and is consulted or informed on all decisions or risks that affect the Company's technology systems and/or implicate cybersecurity. The CAO is responsible for overseeing the cybersecurity team at the executive leadership level. Board of Directors and Audit Committee The Board provides oversight of management’s efforts to assess and manage cybersecurity risks and respond to cybersecurity incidents and threats. In addition, the Audit Committee of the Board of Directors regularly receives reports from management regarding the Company’s financial and compliance risks, including, but not limited to, risks relating to internal controls and cybersecurity risks. The Board receives regular updates from the CISO, CTSO, and CAO regarding matters related to technology and cybersecurity. The Company has protocols, as discussed below, by which certain cybersecurity concerns, incidents and threats are escalated within the Company and, where appropriate, reported in a timely manner to the Board.
Cybersecurity Risk Board Committee or Subcommittee Responsible for Oversight [Text Block]	The Cyber Committee, chaired by the CISO, and whose members include the CTSO, CAO and Chief Risk & Resiliency Officer, as well as other members of senior management and the legal team, is responsible for identifying cybersecurity risks and threats, recommending mitigating actions to strengthen cybersecurity resilience, and meeting risk tolerance thresholds established by senior management. The Cyber Committee also validates that the Company has appropriate people, process and technology capabilities to identify, mitigate and report on cybersecurity risks to the executive leadership team and the Board of Directors. The Cyber Committee meets regularly to allow members of the internal cybersecurity team to present concerns and recommendations for decisions on preventing, identifying, mitigating, and remediating risks and threats. To the extent warranted, the Cyber Committee may additionally be convened on an ad hoc basis. The Cyber Committee makes decisions regarding the reporting of cybersecurity concerns to the executive leadership team, who escalate issues to the Board and/or the Audit Committee as necessary. In the case of incidents that arise, the Cyber Committee, under the direction of the Board and/or executive leadership team when appropriate, works to involve all appropriate personnel with the aim of resolving the incident, performing any required remediation/reporting, and taking appropriate steps to comply with applicable laws and regulations. The process that the Cyber Committee follows upon emergence of incidents is documented in the Company’s Incident Response Plan. Additionally, cybersecurity risks and the adequacy of associated mitigations are analyzed by senior leadership as part of the enterprise risk assessments that are reported to and discussed by the Board.
Cybersecurity Risk Process for Informing Board Committee or Subcommittee Responsible for Oversight [Text Block]	The Cyber Committee, chaired by the CISO, and whose members include the CTSO, CAO and Chief Risk & Resiliency Officer, as well as other members of senior management and the legal team, is responsible for identifying cybersecurity risks and threats, recommending mitigating actions to strengthen cybersecurity resilience, and meeting risk tolerance thresholds established by senior management. The Cyber Committee also validates that the Company has appropriate people, process and technology capabilities to identify, mitigate and report on cybersecurity risks to the executive leadership team and the Board of Directors. The Cyber Committee meets regularly to allow members of the internal cybersecurity team to present concerns and recommendations for decisions on preventing, identifying, mitigating, and remediating risks and threats. To the extent warranted, the Cyber Committee may additionally be convened on an ad hoc basis. The Cyber Committee makes decisions regarding the reporting of cybersecurity concerns to the executive leadership team, who escalate issues to the Board and/or the Audit Committee as necessary. In the case of incidents that arise, the Cyber Committee, under the direction of the Board and/or executive leadership team when appropriate, works to involve all appropriate personnel with the aim of resolving the incident, performing any required remediation/reporting, and taking appropriate steps to comply with applicable laws and regulations. The process that the Cyber Committee follows upon emergence of incidents is documented in the Company’s Incident Response Plan. Additionally, cybersecurity risks and the adequacy of associated mitigations are analyzed by senior leadership as part of the enterprise risk assessments that are reported to and discussed by the Board.
Cybersecurity Risk Role of Management [Text Block]	Management The Company maintains a dedicated internal cybersecurity team that interacts with executive management and its business units to identify, assess, manage, and respond to cybersecurity risks and incidents relating to the Company’s information systems and operations. In addition, this internal cybersecurity team is responsible for managing detection, mitigation and remediation of cybersecurity incidents. The internal cybersecurity team is managed by the CISO, who reports to the CAO, who is a member of the executive leadership team. At December 31, 2024, the Company’s internal cybersecurity team consisted of members located in various countries and time zones across the world. The team has members with experience in governance, risk management and compliance, threat monitoring, threat emulation, penetration testing and cyber incident management. Team members have both individual responsibilities and a team focus, covering areas such as network, endpoint device, and e-mail security engineering as well as operations and threat management, monitoring, and response. The Cyber Committee, chaired by the CISO, and whose members include the CTSO, CAO and Chief Risk & Resiliency Officer, as well as other members of senior management and the legal team, is responsible for identifying cybersecurity risks and threats, recommending mitigating actions to strengthen cybersecurity resilience, and meeting risk tolerance thresholds established by senior management. The Cyber Committee also validates that the Company has appropriate people, process and technology capabilities to identify, mitigate and report on cybersecurity risks to the executive leadership team and the Board of Directors. The Cyber Committee meets regularly to allow members of the internal cybersecurity team to present concerns and recommendations for decisions on preventing, identifying, mitigating, and remediating risks and threats. To the extent warranted, the Cyber Committee may additionally be convened on an ad hoc basis. The Cyber Committee makes decisions regarding the reporting of cybersecurity concerns to the executive leadership team, who escalate issues to the Board and/or the Audit Committee as necessary. In the case of incidents that arise, the Cyber Committee, under the direction of the Board and/or executive leadership team when appropriate, works to involve all appropriate personnel with the aim of resolving the incident, performing any required remediation/reporting, and taking appropriate steps to comply with applicable laws and regulations. The process that the Cyber Committee follows upon emergence of incidents is documented in the Company’s Incident Response Plan. Additionally, cybersecurity risks and the adequacy of associated mitigations are analyzed by senior leadership as part of the enterprise risk assessments that are reported to and discussed by the Board. The CISO has extensive cybersecurity knowledge and skills, gained from over 20 years’ experience working in regulated industries. The CISO holds a number of cybersecurity related certifications, including the Certified Information Systems Security Professional and Certified Information Security Manager. In addition to the CISO, the CTSO has been a close partner and advocate for cybersecurity at the Company, and is consulted or informed on all decisions or risks that affect the Company's technology systems and/or implicate cybersecurity. The CAO is responsible for overseeing the cybersecurity team at the executive leadership level. Board of Directors and Audit Committee The Board provides oversight of management’s efforts to assess and manage cybersecurity risks and respond to cybersecurity incidents and threats. In addition, the Audit Committee of the Board of Directors regularly receives reports from management regarding the Company’s financial and compliance risks, including, but not limited to, risks relating to internal controls and cybersecurity risks. The Board receives regular updates from the CISO, CTSO, and CAO regarding matters related to technology and cybersecurity. The Company has protocols, as discussed below, by which certain cybersecurity concerns, incidents and threats are escalated within the Company and, where appropriate, reported in a timely manner to the Board.
Cybersecurity Risk Management Positions or Committees Responsible [Flag]	true
Cybersecurity Risk Management Positions or Committees Responsible [Text Block]	The Board receives regular updates from the CISO, CTSO, and CAO regarding matters related to technology and cybersecurity. The Company has protocols, as discussed below, by which certain cybersecurity concerns, incidents and threats are escalated within the Company and, where appropriate, reported in a timely manner to the Board.
Cybersecurity Risk Management Expertise of Management Responsible [Text Block]	The CISO has extensive cybersecurity knowledge and skills, gained from over 20 years’ experience working in regulated industries. The CISO holds a number of cybersecurity related certifications, including the Certified Information Systems Security Professional and Certified Information Security Manager. In addition to the CISO, the CTSO has been a close partner and advocate for cybersecurity at the Company, and is consulted or informed on all decisions or risks that affect the Company's technology systems and/or implicate cybersecurity
Cybersecurity Risk Process for Informing Management or Committees Responsible [Text Block]	The Board receives regular updates from the CISO, CTSO, and CAO regarding matters related to technology and cybersecurity. The Company has protocols, as discussed below, by which certain cybersecurity concerns, incidents and threats are escalated within the Company and, where appropriate, reported in a timely manner to the Board.
Cybersecurity Risk Management Positions or Committees Responsible Report to Board [Flag]	true

SUMMARY OF SIGNIFICANT ACCOUN_2

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	12 Months Ended
	Dec. 31, 2024
Accounting Policies [Abstract]
Adoption of New Accounting Standards in 2023	Adoption of New Accounting Standards in 2024 In November 2023, the FASB issued ASU 2023-07, "Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures" ("ASU No. 2023-07"), which expands segment disclosure requirements for public entities. ASU No. 2023-07 requires entities to disclose significant segment expenses by reportable segment if they are regularly provided to the CODM and included in each reported measure of segment profit or loss. In addition, this ASU permits entities to disclose more than one measure of segment profit or loss used by the CODM. Additionally, disclosure of the CODM’s title and position will be required on an annual basis, as well as an explanation of how the CODM uses the reported measure(s). Furthermore, all existing annual disclosures about segment profit or loss and assets must be provided on an interim basis in addition to disclosure of significant segment expenses and other segment items. This ASU is effective for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024, and requires retrospective application to all prior periods presented in the financial statements. The Company adopted this ASU retrospectively for all periods presented with the new required disclosures presented in Note 20. Reclassification of Previously Reported Revenue by LOB In the first quarter of 2024, pursuant to the integration of RMS into the Company's order-to-cash systems, the Company reclassified certain prior year revenue by geography disclosures. The impact of the reclassification was not material, and prior year revenue by LOB disclosures have been reclassified to conform to this new presentation, which is disclosed in Note 3. Recently Issued Accounting Pronouncements In December 2023, the FASB issued ASU 2023-09, "Income Taxes (Topic 740): Improvements to Income Tax Disclosures" ("ASU No. 2023-09"), which is intended to enhance the transparency and decision usefulness of income tax disclosures. The amendments in ASU No. 2023-09 require entities to disclose additional income tax information, primarily related to greater disaggregation of the entity's ETR reconciliation and income taxes paid by jurisdiction disclosures. This ASU is effective for annual periods beginning after December 15, 2024, and should be applied on a prospective basis; however, retrospective application is permitted. The Company is currently evaluating the impact of adopting this ASU on its consolidated financial statements and disclosures. In November 2024, the FASB issued ASU 2024-03, "Income Statement—Reporting Comprehensive Income—Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses" ("ASU No. 2024-03"). The amendments in this ASU require more detailed disclosures about specific expense categories in the notes to financial statements (including employee compensation, depreciation and intangible asset amortization) and apply to both interim and annual reporting periods. ASU No. 2024-03 also requires disclosure of total selling expenses for both interim and annual reporting periods, with an additional requirement to provide an entity’s definition of selling expenses in annual reporting. This ASU is effective in fiscal years beginning after December 15, 2026, and interim periods within fiscal years beginning after December 15, 2027. Early adoption is permitted. The amendments in this ASU should be applied either (1) prospectively for annual and interim reporting periods beginning after the aforementioned effective dates or (2) retrospectively to any or all prior periods presented in the financial statements. The Company is currently evaluating the impact of adopting this ASU on its consolidated financial statements and disclosures.
Basis of Consolidation	Basis of Consolidation The consolidated financial statements include those of Moody’s Corporation and its majority- and wholly-owned subsidiaries. The effects of all intercompany transactions have been eliminated. Investments in companies for which the Company has significant influence over operating and financial policies but not a controlling interest are accounted for on an equity basis whereby the Company records its proportional share of the investment’s net income or loss as part of other non-operating income (expense), net and any dividends received reduce the carrying amount of the investment. Equity investments without a readily determinable fair value for which the Company does not have significant influence are accounted for under the ASC Topic 321 measurement alternative; these investments are recorded at initial cost, less impairment, adjusted upward or downward for any observable price changes in similar investments. The Company applies the guidelines set forth in ASC Topic 810 assessing its interests in voting and variable interest entities to decide whether to consolidate an entity. The Company has reviewed the potential variable interest entities and determined that there are no consolidation requirements under ASC Topic 810. The Company consolidates its ICRA subsidiaries on a three month lag.
Cash and Cash Equivalents	Cash and Cash Equivalents Cash equivalents principally consist of investments in money market deposit accounts and money market funds as well as certificates of deposit with maturities of three months or less when purchased.
Short-term Investments	Short-term Investments Short-term investments are securities with maturities greater than 90 days at the time of purchase that are available for operations in the next 12 months. The Company’s short-term investments primarily consist of certificates of deposit and their cost approximates fair value due to the short-term nature of the instruments. Interest and dividends on these investments are recorded into income when earned.
Property and Equipment	Property and Equipment Property and equipment are stated at cost and are depreciated using the straight-line method over their estimated useful lives. Expenditures for maintenance and repairs that do not extend the economic useful life of the related assets are charged to expense as incurred.
Computer Software Developed or Obtained for Internal Use	Computer Software Developed or Obtained for Internal Use The Company capitalizes costs related to software developed or obtained for internal use. These assets, included in property and equipment in the consolidated balance sheets, relate to MA's SaaS-based solutions as well as the Company’s financial, website and other systems. Such costs generally consist of employee compensation, direct costs for third-party license fees and professional services provided by third parties, in each case incurred either during the application development stage or in connection with upgrades and enhancements that increase functionality. Such costs are depreciated over their estimated useful lives on a straight-line basis. Costs incurred during the preliminary project stage of development as well as maintenance costs are expensed as incurred.
Goodwill and Other Acquired Intangible Assets	Goodwill and Other Acquired Intangible Assets Moody’s evaluates its goodwill for impairment at the reporting unit level, defined as an operating segment (i.e., MA and MIS), or one level below an operating segment (i.e., a component of an operating segment), annually as of July 31 or more frequently if impairment indicators arise in accordance with ASC Topic 350. The Company evaluates the recoverability of goodwill using a two-step impairment test approach at the reporting unit level. In the first step, the Company assesses various qualitative factors to determine whether the fair value of a reporting unit may be less than its carrying amount. If a determination is made based on the qualitative factors that an impairment does not exist, the Company is not required to perform further testing. If the aforementioned qualitative assessment results in the Company concluding that it is more likely than not that the fair value of a reporting unit may be less than its carrying amount, the fair value of the reporting unit will be quantitatively determined and compared to its carrying value including goodwill. If the fair value of the reporting unit exceeds the carrying value of the net assets assigned to that unit, goodwill is not impaired and the Company is not required to perform further testing. If the fair value of the reporting unit is less than the carrying value, the Company will record a goodwill impairment charge for the amount by which the carrying value exceeds the reporting unit’s fair value. The Company evaluates its reporting units on an annual basis, or more frequently if there are changes in the reporting structure of the Company due to acquisitions, realignments or if there are indicators of potential impairment. For the reporting units where the Company is consistently able to conclude that no impairment exists using only a qualitative approach, the Company’s accounting policy is to perform the second step of the aforementioned goodwill impairment assessment at least once every three years. For purposes of assessing the recoverability of goodwill, the Company has four reporting units: two reporting units within MA consisting of businesses that offer: i) data and data-driven analytical solutions; and ii) risk-management software, workflow and CRE solutions and two within the Company’s ratings business (one for the ICRA business and one that encompasses all of Moody’s other ratings operations).
Impairment of long-lived assets and definite-lived intangible assets	Impairment of long-lived assets and definite-lived intangible assets Long-lived assets (including ROU Assets) and amortizable intangible assets are reviewed for recoverability whenever events or changes in circumstances indicate that the carrying amount may not be recoverable.
Stock-Based Compensation	Stock-Based Compensation The Company records compensation expense over the requisite service period for all share-based payment award transactions granted to employees based on the fair value of the equity instrument at the time of grant. This includes shares issued under stock option and restricted stock plans.
Derivative Instruments and Hedging Activities	Derivative Instruments and Hedging Activities
Revenue Recognition and Costs to Obtain or Fulfill a Contract with a Customer	Revenue Recognition and Costs to Obtain or Fulfill a Contract with a Customer Revenue recognition: Revenue is recognized when control of promised goods or services is transferred to the customer, in an amount that reflects the consideration the Company expects to be entitled to in exchange for those goods or services. When contracts with customers contain multiple performance obligations, the Company accounts for individual performance obligations separately if they are distinct. The transaction price is allocated to each distinct performance obligation on a relative SSP basis. The Company determines the SSP by using the price charged for a deliverable when sold separately or uses management’s best estimate of SSP for goods or services not sold separately using estimation techniques that maximize observable data points, including: internal factors relevant to its pricing practices such as costs and margin objectives; standalone sales prices of similar products; pricing policies; percentage of the fee charged for a primary product or service relative to a related product or service; and geography. Sales, usage-based, value added and other taxes are excluded from revenues. MA Revenue In the MA segment, products and services offered by the Company include hosted research and data subscriptions, installed and hosted software subscriptions, perpetual installed software licenses and related maintenance, or PCS, and professional services. Subscription and PCS contracts are generally invoiced in advance of the contractual coverage period, which is principally one year, but can range from 3-5 years. Professional services are invoiced as those services are provided. Payment terms and conditions vary by contract type, but primarily include a requirement of payment within 30 to 60 days. Revenue from research, data and other hosted subscriptions is recognized ratably over the related subscription period as MA's performance obligation to provide access to these products is progressively fulfilled over the stated term of the contract. A large portion of these services are invoiced in the months of November, December and January. Revenue from installed software subscriptions, which includes PCS, is bifurcated into a software license performance obligation and a PCS performance obligation, which follow the patterns of recognition described above, except for those installed subscriptions where the software license and PCS performance obligations were determined to be incapable of being distinct from each other in accordance with ASC 606-10-25-19 and ASC 606-10-25-20. In such instances, revenue is recognized over time. Revenue from the sale of a software license, when considered distinct from the related software implementation services, is generally recognized at the time the product master or first copy is delivered or transferred to the customer. PCS is generally recognized ratably over the contractual period commencing when the software license is fully delivered. For implementation services and other service projects for which fees are fixed, the Company determined progress towards completion is most accurately measured on a percentage-of-completion basis (input method) as this approach utilizes the most directly observable data points and is therefore used to recognize the related revenue. For implementation services where price varies based on time expended, a time-based measure of progress towards completion of the performance obligation is utilized. Revenue from professional services rendered is generally recognized over time as the services are performed. Products and services offered within the MA segment are sold either stand-alone or together in various combinations. In instances where an arrangement contains multiple performance obligations, the Company accounts for the individual performance obligations separately if they are considered distinct. Revenue is generally allocated to all performance obligations based upon the relative SSP at contract inception. For certain performance obligations, judgment is required to determine the SSP. Revenue is recognized for each performance obligation based upon the conditions for revenue recognition noted above. In the MA segment, customers usually pay a fixed fee for the products and services based on signed contracts. However, accounting for variable consideration is applied mainly for: i) estimates for cancellation rights and price concessions and ii) T&M based services. The Company estimates the variable consideration associated with cancellation rights and price concessions based on the expected amount to be provided to customers and reduces the amount of revenue to be recognized. MIS Revenue In the MIS segment, revenue arrangements with multiple elements are generally comprised of two distinct performance obligations, a rating and the related monitoring service. Revenue attributed to ratings of issued securities is generally recognized when the rating is delivered to the issuer. Revenue attributed to monitoring of issuers or issued securities is recognized ratably over the period in which the monitoring is performed, generally one year. In the case of certain structured finance products, primarily CMBS, issuers can elect to pay all of the annual monitoring fees upfront. These fees are deferred and recognized over the future monitoring periods based on the expected lives of the rated securities. MIS arrangements generally have standard contractual terms for which the stated payments are due at conclusion of the ratings process for ratings and either upfront or in arrears for monitoring services; and are signed by customers either on a per issue basis or at the beginning of the relationship with the customer. In situations when customer fees for an arrangement may be variable, the Company estimates the variable consideration at inception using the expected value method based on analysis of similar contracts in the same line of business, which is constrained based on the Company’s assessment of the realization of the adjustment amount. The Company allocates the transaction price within arrangements that include multiple performance obligations based upon the relative SSP of each service. The SSP for both rating and monitoring services is generally based upon observable selling prices where the rating or monitoring service is sold separately to similar customers. Costs to Obtain or Fulfill a Contract with a Customer: Costs to obtain a contract with a customer Costs incurred to obtain customer contracts, such as sales commissions, are deferred and recorded within other current assets and other assets when such costs are determined to be incremental to obtaining a contract, would not have been incurred otherwise and the Company expects to recover those costs. These costs are amortized to expense on a systematic basis consistent with the transfer of the products or services to the customer. Depending on the line of business to which the contract relates, this may be based upon the average economic life of the products sold or average period for which services are provided, inclusive of anticipated contract renewals. Determining the estimated economic life of the products sold requires judgment with respect to anticipated future technological changes. Costs to obtain customer contracts are only incurred in the MA segment. Cost to fulfill a contract with a customer Costs incurred to fulfill customer contracts, are deferred and recorded within other current assets and other assets when such costs relate directly to a contract, generate or enhance resources of the Company that will be used in satisfying performance obligations in the future and the Company expects to recover those costs. The Company capitalizes royalty costs within the MA segment related to third-party information data providers associated with hosted company information and business intelligence products. These costs are amortized to expense consistent with the recognition pattern of the related revenue over time. In addition, the Company capitalizes work-in-process costs for in-progress MIS ratings, which is recognized consistent with the rendering of the related services to the customers, as ratings are issued.
Accounts Receivable Allowances	Accounts Receivable Allowances In order to determine an estimate of expected credit losses, receivables are segmented based on similar risk characteristics including historical credit loss patterns to calculate reserve rates. The Company uses an aging method for developing its allowance for credit losses by which receivable balances are stratified based on aging category. A reserve rate is calculated for each aging category which is generally based on historical information, and is adjusted, when necessary, for current conditions (e.g., macroeconomic or industry related) and reasonable and supportable forecasts about the future. The Company also considers customer specific information (e.g., bankruptcy or financial difficulty) when estimating its expected credit losses, as well as the economic environment of the customers, both from an industry and geographic perspective, in evaluating the need for allowances. Expected credit losses are reflected as additions to the accounts receivable allowance. Actual uncollectible account write-offs are recorded against the allowance.
Leases	Leases The Company has operating leases, which substantially all relate to the lease of office space. The Company’s leases which are classified as finance leases are not material to the consolidated financial statements. The Company determines if an arrangement meets the definition of a lease at contract inception. The Company recognizes in its consolidated balance sheets a lease liability and an ROU Asset for all leases with a lease term greater than 12 months. In determining the length of the lease term, the Company utilizes judgment in assessing the likelihood of whether it is reasonably certain that it will exercise an option to extend or early-terminate a lease, if such options are provided in the lease agreement. ROU Assets represent the Company’s right to use an underlying asset for the lease term and lease liabilities represent the Company’s obligation to make lease payments arising from the lease. ROU Assets and lease liabilities are recognized at the lease commencement date based on the present value of lease payments over the lease term. As substantially all of the Company’s leases do not provide an implicit interest rate, the Company uses its estimated secured incremental borrowing rates at the lease commencement date in determining the present value of lease payments. These secured incremental borrowing rates are attributable to the currency in which the lease is denominated. At commencement, the Company’s initial measurement of the ROU Asset is calculated as the present value of the remaining lease payments (i.e., lease liability), with additive adjustments reflecting: initial direct costs (e.g., broker commissions) and prepaid lease payments (if any); and reduced by any lease incentives provided by the lessor if: (i) received before lease commencement or (ii) receipt of the lease incentive is contingent upon future events for which the occurrence is both probable and within the Company’s control. Lease expense for minimum operating lease payments is recognized on a straight-line basis over the lease term. This straight-line lease expense represents a single lease cost which is comprised of both an interest accretion component relating to the lease liability and amortization of the ROU Assets. The Company records this single lease cost in operating and SG&A expenses. However, in situations where an operating lease ROU Asset has been impaired, the subsequent amortization of the ROU Asset is then recorded on a straight-line basis over the remaining lease term and is combined with accretion expense on the lease liability to result in single operating lease cost (which subsequent to impairment will no longer follow a straight-line recognition pattern). The Company has lease agreements which include lease and non-lease components. For the Company’s office space leases, the lease components (e.g., fixed rent payments) and non-lease components (e.g., fixed common-area maintenance costs) are combined and accounted for as a single lease component. Variable lease payments (e.g., variable common-area-maintenance costs) are only included in the initial measurement of the lease liability to the extent those payments depend on an index or a rate. Variable lease payments not included in the lease liability are recognized in net income in the period in which the obligation for those payments is incurred.
Contingencies	Contingencies Moody’s is involved in legal and tax proceedings, governmental, regulatory and legislative investigations and inquiries, claims and litigation that are incidental to the Company’s business, including claims based on ratings assigned by MIS. Moody’s is also subject to ongoing tax audits in the normal course of business. Management periodically assesses the Company’s liabilities and contingencies in connection with these matters based upon the latest information available. Moody’s discloses material pending legal proceedings pursuant to SEC rules and other pending matters as it may determine to be appropriate. For claims, litigation and proceedings and governmental investigations and inquiries not related to income taxes, the Company records liabilities in the consolidated financial statements when it is both probable that a liability has been incurred and the amount of loss can be reasonably estimated and periodically adjusts these as appropriate. When the reasonable estimate of the loss is within a range of amounts, the minimum amount of the range is accrued unless some higher amount within the range is a better estimate than another amount within the range. In instances when a loss is reasonably possible but uncertainties exist related to the probable outcome and/or the amount or range of loss, management does not record a liability but discloses the contingency if material. As additional information becomes available, the Company adjusts its assessments and estimates of such matters accordingly. Moody’s also discloses material pending legal proceedings pursuant to SEC rules and other pending matters as it may determine to be appropriate. In view of the inherent difficulty of assessing the potential outcome of legal proceedings, governmental, regulatory and legislative investigations and inquiries, claims and litigation and similar matters and contingencies, particularly when the claimants seek large or indeterminate damages or assert novel legal theories or the matters involve a large number of parties, the Company often cannot predict what the eventual outcome of the pending matters will be or the timing of any resolution of such matters. The Company also may be unable to predict the impact (if any) that any such matters may have on how its business is conducted, on its competitive position or on its financial position, results of operations or cash flows. As the process to resolve any pending matters progresses, management will continue to review the latest information available and assess its ability to predict the outcome of such matters and the effects, if any, on its operations and financial condition and to accrue for and disclose such matters as and when required. However, because such matters are inherently unpredictable and unfavorable developments or resolutions can occur, the ultimate outcome of such matters, including the amount of any loss, may differ from those estimates.
Operating Expenses	Operating Expenses Operating expenses include costs associated with the development and production of the Company’s products and services and their delivery to customers. These expenses principally include employee compensation and benefits and travel costs that are incurred in connection with these activities. Operating expenses are charged to income as incurred.
Selling, General and Administrative Expenses	Selling, General and Administrative Expenses SG&A expenses include such items as compensation and benefits for corporate officers and staff and compensation and other expenses related to sales. They also include items such as office rent, business insurance and professional fees. SG&A expenses are charged to income as incurred.
Foreign Currency Translation	Foreign Currency Translation For all operations outside the U.S. where the Company has designated the local currency as the functional currency, assets and liabilities are translated into U.S. dollars using end of year exchange rates, and revenue and expenses are translated using average exchange rates for the year. For these foreign operations, currency translation adjustments are recorded to other comprehensive income.
Comprehensive Income	Comprehensive Income Comprehensive income represents the change in net assets of a business enterprise during a period due to transactions and other events and circumstances from non-owner sources including: foreign currency translation impacts; net actuarial gains and losses and net prior service costs related to pension and other retirement plans; and gains and losses on derivative instruments designated as net investment hedges or cash flow hedges. Comprehensive income items, including cumulative translation adjustments of entities that are less-than-wholly-owned subsidiaries, will be reclassified to noncontrolling interests and thereby, adjusting AOCI(L) proportionately in accordance with the percentage of ownership interest of the non-controlling shareholder. Additionally, the Company reclassifies the income tax effects from AOCI(L) at such time as the earnings or loss of the related activity are recognized in earnings.
Income Taxes	Income Taxes The Company accounts for income taxes under the asset and liability method in accordance with ASC Topic 740. Therefore, income tax expense is based on reported income before income taxes and deferred income taxes reflect the effect of temporary differences between the amounts of assets and liabilities that are recognized for financial reporting purposes and the amounts that are recognized for income tax purposes. The Company classifies interest related to unrecognized tax benefits as a component of interest expense in its consolidated statements of operations. Penalties are recognized in other non-operating expenses. For UTPs, the Company first determines whether it is more-likely-than-not (defined as a likelihood of more than fifty percent) that a tax position will be sustained based on its technical merits as of the reporting date, assuming that taxing authorities will examine the position and have full knowledge of all relevant information. A tax position that meets this more-likely-than-not threshold is then measured and recognized at the largest amount of benefit that is greater than fifty percent likely to be realized upon effective settlement with a taxing authority. The Company has provided deferred taxes for those entities whose earnings are not considered indefinitely reinvested.
Fair Value of Financial Instruments	Fair Value of Financial Instruments The Company’s financial instruments include cash, cash equivalents, trade receivables and payables, and certain short-term investments consisting primarily of certificates of deposit and money market deposits, all of which are short-term in nature and, accordingly, approximate fair value. The Company also invests in mutual funds, which are accounted for as equity securities with readily determinable fair values under ASC Topic 321. The Company measures these investments at fair value with both realized gains and losses and unrealized holding gains and losses for these investments included in net income. Also, the Company uses derivative instruments to manage certain financial exposures that occur in the normal course of business. These derivative instruments are carried at fair value in the Company’s consolidated balance sheets. Fair value is defined by the ASC Topic 820 as the price that would be received from selling an asset or paid to transfer a liability (i.e., an exit price) in an orderly transaction between market participants at the measurement date. The determination of this fair value is based on the principal or most advantageous market in which the Company could commence transactions and considers assumptions that market participants would use when pricing the asset or liability, such as inherent risk, transfer restrictions and risk of nonperformance. Also, determination of fair value assumes that market participants will consider the highest and best use of the asset. The ASC establishes a fair value hierarchy whereby the inputs contained in valuation techniques used to measure fair value are categorized into three broad levels as follows: Level 1: quoted market prices in active markets that the reporting entity has the ability to access at the date of the fair value measurement; Level 2: inputs other than quoted market prices described in Level 1 that are observable for the asset or liability, either directly or indirectly, such as quoted prices in active markets for similar assets or liabilities, quoted prices for identical or similar assets or liabilities in markets that are not active or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities; Level 3: unobservable inputs that are supported by little or no market activity and that are significant to the fair value measurement of the assets or liabilities.
Concentration of Credit Risk	Concentration of Credit Risk Financial instruments that potentially subject the Company to concentration of credit risk principally consist of cash and cash equivalents, short-term investments, trade receivables and derivatives. For cash and cash equivalents, short-term investments and derivatives, the Company manages its credit exposure by limiting the amount of counterparty risk with any particular financial institution; limits are assigned to each counterparty based on perceived quality of credit and are monitored daily. Cash equivalents are held among various money market deposit accounts, money market funds, and certificates of deposits as of December 31, 2024 and 2023. Short-term investments primarily consist of certificates of deposit as of December 31, 2024 and 2023. Derivatives primarily consist of foreign exchange forwards or swap contracts (interest rate swaps and cross-currency swaps) as of December 31, 2024 and 2023. For trade receivables, no customer accounted for 10% or more of accounts receivable at December 31, 2024 or 2023.
Earnings per Share of Common Stock	Earnings per Share of Common Stock Basic shares outstanding is calculated based on the weighted average number of shares of common stock outstanding during the reporting period. Diluted shares outstanding is calculated giving effect to all potentially dilutive common shares, assuming that such shares were outstanding and dilutive during the reporting period.
Pension and Other Retirement Benefits	Pension and Other Retirement Benefits Moody’s maintains various noncontributory DBPPs as well as other contributory and noncontributory retirement plans. The expense and assets/liabilities that the Company reports for its pension and other retirement benefits are dependent on many assumptions concerning the outcome of future events and circumstances. These assumptions represent the Company’s best estimates and may vary by plan. The differences between the assumptions for the expected long-term rate of return on plan assets and actual experience is spread over a five-year period to the market-related value of plan assets, which is used in determining the expected return on assets component of annual pension expense. All other actuarial gains and losses are generally deferred and amortized over the estimated average future working life of active plan participants. The Company recognizes as an asset or liability in its consolidated balance sheet the funded status of its defined benefit retirement plans, measured on a plan-by-plan basis. Changes in the funded status due to actuarial gains/losses are recorded as part of other comprehensive income during the period the changes occur.
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenue and expenses during the period. Actual results could differ from those estimates.

REVENUES (Tables)

REVENUES (Tables)	12 Months Ended
	Dec. 31, 2024
Revenue from Contract with Customer [Abstract]
Disaggregation of Revenue	The following table presents the Company’s revenues disaggregated by LOB: Year Ended December 31, 2024 2023 2022 MA: Decision Solutions (DS) Banking $ 551 $ 521 $ 481 Insurance 598 550 504 KYC 367 312 260 Total DS 1,516 1,383 1,245 Research and Insights (R&I) 926 884 812 Data and Information (D&I) 853 789 712 Total external revenue 3,295 3,056 2,769 Intersegment revenue 13 13 8 Total MA 3,308 3,069 2,777 MIS: Corporate finance (CFG) Investment-grade 488 335 294 High-yield 285 150 108 Bank loans 527 292 275 Other accounts (1) 650 627 592 Total CFG 1,950 1,404 1,269 Structured finance (SFG) Asset-backed securities 130 121 116 RMBS 98 92 106 CMBS 94 60 98 Structured credit 193 129 140 Other accounts (SFG) 3 3 2 Total SFG 518 405 462 Financial institutions (FIG) Banking 450 378 337 Insurance 214 123 113 Managed investments 49 32 28 Other accounts (FIG) 14 12 13 Total FIG 727 545 491 Public, project and infrastructure finance (PPIF) Public finance / sovereign 240 205 197 Project and infrastructure 324 271 234 Total PPIF 564 476 431 Total ratings revenue 3,759 2,830 2,653 MIS Other 34 30 46 Total external revenue 3,793 2,860 2,699 Intersegment royalty 193 186 174 Total MIS 3,986 3,046 2,873 Eliminations (206) (199) (182) Total MCO $ 7,088 $ 5,916 $ 5,468 (1) Other includes: recurring monitoring fees of a rated debt obligation and/or entities that issue such obligations as well as fees from programs such as commercial paper, medium term notes, and ICRA corporate finance revenue. The following table presents the Company’s revenues disaggregated by LOB and geographic area: Year Ended December 31, 2024 Year Ended December 31, 2023 Year Ended December 31, 2022 U.S. Non-U.S. Total U.S. Non-U.S. Total U.S. Non-U.S. Total MA: Decision Solutions $ 570 $ 946 $ 1,516 $ 550 $ 833 $ 1,383 $ 511 $ 734 $ 1,245 Research and Insights 514 412 926 490 394 884 470 342 812 Data and Information 306 547 853 281 508 789 250 462 712 Total MA 1,390 1,905 3,295 1,321 1,735 3,056 1,231 1,538 2,769 MIS: Corporate finance 1,333 617 1,950 952 452 1,404 832 437 1,269 Structured finance 368 150 518 252 153 405 308 154 462 Financial institutions 386 341 727 253 292 545 223 268 491 Public, project and infrastructure finance 359 205 564 292 184 476 266 165 431 Total ratings revenue 2,446 1,313 3,759 1,749 1,081 2,830 1,629 1,024 2,653 MIS Other — 34 34 1 29 30 5 41 46 Total MIS 2,446 1,347 3,793 1,750 1,110 2,860 1,634 1,065 2,699 Total MCO $ 3,836 $ 3,252 $ 7,088 $ 3,071 $ 2,845 $ 5,916 $ 2,865 $ 2,603 $ 5,468 The following table presents the Company's reportable segment revenues disaggregated by segment and geographic region: Year Ended December 31, 2024 2023 2022 MA: U.S. $ 1,390 $ 1,321 $ 1,231 Non-U.S.: EMEA 1,306 1,207 1,060 Asia-Pacific 345 299 268 Americas 254 229 210 Total Non-U.S. 1,905 1,735 1,538 Total MA 3,295 3,056 2,769 MIS: U.S. 2,446 1,750 1,634 Non-U.S.: EMEA 868 679 648 Asia-Pacific 284 271 271 Americas 195 160 146 Total Non-U.S. 1,347 1,110 1,065 Total MIS 3,793 2,860 2,699 Total MCO $ 7,088 $ 5,916 $ 5,468 The following table summarizes the split between transaction and recurring revenue: Year Ended December 31, 2024 2023 2022 Transaction Recurring Total Transaction Recurring Total Transaction Recurring Total Decision Solutions Banking $ 117 $ 434 $ 551 $ 130 $ 391 $ 521 $ 124 $ 357 $ 481 21 % 79 % 100 % 25 % 75 % 100 % 26 % 74 % 100 % Insurance $ 23 $ 575 $ 598 $ 38 $ 512 $ 550 $ 28 $ 476 $ 504 4 % 96 % 100 % 7 % 93 % 100 % 6 % 94 % 100 % KYC $ 2 $ 365 $ 367 $ 1 $ 311 $ 312 $ 1 $ 259 $ 260 1 % 99 % 100 % — % 100 % 100 % — % 100 % 100 % Total Decision Solutions $ 142 $ 1,374 $ 1,516 $ 169 $ 1,214 $ 1,383 $ 153 $ 1,092 $ 1,245 9 % 91 % 100 % 12 % 88 % 100 % 12 % 88 % 100 % Research and Insights $ 15 $ 911 $ 926 $ 16 $ 868 $ 884 $ 17 $ 795 $ 812 2 % 98 % 100 % 2 % 98 % 100 % 2 % 98 % 100 % Data and Information $ 4 $ 849 $ 853 $ 3 $ 786 $ 789 $ — $ 712 $ 712 — % 100 % 100 % — % 100 % 100 % — % 100 % 100 % Total MA (1) $ 161 $ 3,134 $ 3,295 $ 188 $ 2,868 $ 3,056 $ 170 $ 2,599 $ 2,769 5 % 95 % 100 % 6 % 94 % 100 % 6 % 94 % 100 % Corporate Finance $ 1,415 $ 535 $ 1,950 $ 887 $ 517 $ 1,404 $ 772 $ 497 $ 1,269 73 % 27 % 100 % 63 % 37 % 100 % 61 % 39 % 100 % Structured Finance $ 292 $ 226 $ 518 $ 190 $ 215 $ 405 $ 262 $ 200 $ 462 56 % 44 % 100 % 47 % 53 % 100 % 57 % 43 % 100 % Financial Institutions $ 418 $ 309 $ 727 $ 254 $ 291 $ 545 $ 211 $ 280 $ 491 57 % 43 % 100 % 47 % 53 % 100 % 43 % 57 % 100 % Public, Project and Infrastructure Finance $ 384 $ 180 $ 564 $ 301 $ 175 $ 476 $ 263 $ 168 $ 431 68 % 32 % 100 % 63 % 37 % 100 % 61 % 39 % 100 % MIS Other $ 8 $ 26 $ 34 $ 6 $ 24 $ 30 $ 4 $ 42 $ 46 24 % 76 % 100 % 20 % 80 % 100 % 9 % 91 % 100 % Total MIS $ 2,517 $ 1,276 $ 3,793 $ 1,638 $ 1,222 $ 2,860 $ 1,512 $ 1,187 $ 2,699 66 % 34 % 100 % 57 % 43 % 100 % 56 % 44 % 100 % Total Moody’s Corporation $ 2,678 $ 4,410 $ 7,088 $ 1,826 $ 4,090 $ 5,916 $ 1,682 $ 3,786 $ 5,468 38 % 62 % 100 % 31 % 69 % 100 % 31 % 69 % 100 % (1) Revenue from software implementation services and risk management advisory projects, while classified by management as transactional revenue, is recognized over time under GAAP . The following table presents the timing of revenue recognition: Year Ended December 31, 2024 Year Ended December 31, 2023 Year Ended December 31, 2022 MA MIS Total MA MIS Total MA MIS Total Revenue recognized at a point in time $ 101 $ 2,517 $ 2,618 $ 102 $ 1,638 $ 1,740 $ 97 $ 1,512 $ 1,609 Revenue recognized over time 3,194 1,276 4,470 2,954 1,222 4,176 2,672 1,187 3,859 Total $ 3,295 $ 3,793 $ 7,088 $ 3,056 $ 2,860 $ 5,916 $ 2,769 $ 2,699 $ 5,468
Unbilled Receivables	The following table presents the Company's unbilled receivables, which are included within accounts receivable, net, at December 31, 2024 and December 31, 2023: As of December 31, 2024 As of December 31, 2023 MA MIS MA MIS Unbilled Receivables $ 122 $ 426 $ 119 $ 415
Schedule of Changes in the Deferred Revenue Balances	Significant changes in the deferred revenue balances during the year ended December 31, 2024 are as follows: Year Ended December 31, 2024 MA MIS Total Balance at December 31, 2023 $ 1,111 $ 270 $ 1,381 Changes in deferred revenue Revenue recognized that was included in the deferred revenue balance at the beginning of the period (1,044) (209) (1,253) Increases due to amounts billable excluding amounts recognized as revenue during the period 1,200 211 1,411 Increases due to acquisitions during the period 9 — 9 Effect of exchange rate changes (33) (4) (37) Total changes in deferred revenue 132 (2) 130 Balance at December 31, 2024 $ 1,243 $ 268 $ 1,511 Deferred revenue - current $ 1,243 $ 211 $ 1,454 Deferred revenue - non-current $ — $ 57 $ 57 Significant changes in the deferred revenue balances during the year ended December 31, 2023 are as follows: Year Ended December 31, 2023 MA MIS Total Balance at December 31, 2022 $ 1,055 $ 278 $ 1,333 Changes in deferred revenue Revenue recognized that was included in the deferred revenue balance at the beginning of the period (980) (211) (1,191) Increases due to amounts billable excluding amounts recognized as revenue during the period 1,015 200 1,215 Effect of exchange rate changes 21 3 24 Total changes in deferred revenue 56 (8) 48 Balance at December 31, 2023 $ 1,111 $ 270 $ 1,381 Deferred revenue - current $ 1,109 $ 207 $ 1,316 Deferred revenue - non-current $ 2 $ 63 $ 65 Significant changes in the deferred revenue balances during the year ended December 31, 2022 are as follows: Year Ended December 31, 2022 MA MIS Total Balance at December 31, 2021 $ 1,039 $ 296 $ 1,335 Changes in deferred revenue Revenue recognized that was included in the deferred revenue balance at the beginning of the period (996) (210) (1,206) Increases due to amounts billable excluding amounts recognized as revenue during the period 1,018 202 1,220 Increases due to acquisitions during the period 1 — 1 Effect of exchange rate changes (7) (10) (17) Total changes in deferred revenue 16 (18) (2) Balance at December 31, 2022 $ 1,055 $ 278 $ 1,333 Deferred revenue—current $ 1,053 $ 205 $ 1,258 Deferred revenue—non-current $ 2 $ 73 $ 75 For the MA segment, for the year ended December 31, 2024, the increase in deferred revenue was primarily due to organic growth. The change in deferred revenue for both segments was not significant for the years ended December 31, 2023 and 2022.
Capitalized Contract Cost	MA Costs to Obtain a Contract with a Customer As of December 31, 2024 2023 Capitalized costs to obtain sales contracts $ 294 $ 268 Year ended December 31, 2024 2023 2022 Amortization of capitalized costs to obtain sales contracts $ 110 $ 102 $ 80 MA and MIS Costs to Fulfill a Contract with a Customer As of December 31, 2024 As of December 31, 2023 MA MIS Total MA MIS Total Capitalized costs to fulfill sales contracts $ 39 $ 12 $ 51 $ 35 $ 9 $ 44 Year Ended Year Ended Year Ended MA MIS Total MA MIS Total MA MIS Total Amortization of capitalized costs to fulfill sales contracts $ 77 $ 43 $ 120 $ 70 $ 44 $ 114 $ 69 $ 54 $ 123

RECONCILIATION OF WEIGHTED AV_2

RECONCILIATION OF WEIGHTED AVERAGE SHARES OUTSTANDING (Tables)	12 Months Ended
	Dec. 31, 2024
Earnings Per Share [Abstract]
Reconciliation of Basic to Diluted Shares Outstanding	Below is a reconciliation of basic to diluted shares outstanding: Year Ended December 31, 2024 2023 2022 Basic 181.8 183.2 183.9 Dilutive effect of shares issuable under stock-based compensation plans 0.9 0.8 0.8 Diluted 182.7 184.0 184.7 Antidilutive options to purchase common shares and restricted stock as well as contingently issuable restricted stock which are excluded from the table above 0.4 0.5 0.5

CASH EQUIVALENTS AND INVESTME_2

CASH EQUIVALENTS AND INVESTMENTS (Tables)	12 Months Ended
	Dec. 31, 2024
Cash and Cash Equivalents [Abstract]
Cash and Cash Equivalents	The tables below provide additional information on the Company’s cash equivalents and investments: As of December 31, 2024 Cost Gross Unrealized Gains Fair Value Consolidated Balance Sheet location Cash and cash equivalents Short-term investments Other assets Certificates of deposit and money market deposit accounts/funds (1) $ 1,911 $ — $ 1,911 $ 1,345 $ 566 $ — Mutual funds $ 88 $ 10 $ 98 $ — $ — $ 98 As of December 31, 2023 Cost Gross Unrealized Gains Fair Value Consolidated Balance Sheet location Cash and cash equivalents Short-term investments Other assets Certificates of deposit and money market deposit accounts/funds (1) $ 1,178 $ — $ 1,178 $ 1,112 $ 63 $ 3 Mutual funds $ 91 $ 6 $ 97 $ — $ — $ 97 (1) Consists of time deposits, money market deposit accounts and money market funds. The remaining contractual maturities for the certificates of deposits classified as short-term investments are 1 month to 12 months at both December 31, 2024 and December 31, 2023. The remaining contractual maturities for the certificates of deposit classified in other assets are 14 months at December 31, 2023. Time deposits with a maturity of less than 90 days at time of purchase are classified as cash and cash equivalents.

DERIVATIVE INSTRUMENTS AND HE_2

DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Tables)	12 Months Ended
	Dec. 31, 2024
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Instruments	The following table summarizes the Company’s interest rate swaps designated as fair value hedges: Notional Amount Hedged Item Nature of Swap As of December 31, 2024 As of December 31, 2023 Floating Interest Rate 2014 Senior Notes due 2044 Pay Floating/Receive Fixed $ 300 $ 300 SOFR 2017 Senior Notes due 2028 Pay Floating/Receive Fixed 500 500 SOFR 2018 Senior Notes due 2029 Pay Floating/Receive Fixed 400 400 SOFR 2018 Senior Notes due 2048 Pay Floating/Receive Fixed 300 300 SOFR 2020 Senior Notes due 2025 Pay Floating/Receive Fixed 300 300 SOFR 2022 Senior Notes due 2052 Pay Floating/Receive Fixed 500 500 SOFR 2022 Senior Notes due 2032 Pay Floating/Receive Fixed 250 250 SOFR Total $ 2,550 $ 2,550 December 31, 2024 Pay Receive Nature of Swap Notional Amount Weighted Average Interest Rate Notional Amount Weighted Average Interest Rate Pay Fixed/Receive Fixed € 965 2.91% $ 1,014 4.41% Pay Floating/Receive Floating 2,138 Based on ESTR 2,250 Based on SOFR Total € 3,103 $ 3,264 December 31, 2023 Pay Receive Nature of Swap Notional Amount Weighted Average Interest Rate Notional Amount Weighted Average Interest Rate Pay Fixed/Receive Fixed € 765 3.67% $ 800 5.25% Pay Floating/Receive Floating 2,138 Based on ESTR 2,250 Based on SOFR Total € 2,903 $ 3,050
Gains and Losses on Derivatives Designated as Hedging Instruments	The following table summarizes the impact to the statements of operations of the Company’s interest rate swaps designated as fair value hedges: Total amounts of financial statement line item presented in the statements of operations in which the effects of fair value hedges are recorded Amount of income (expense) recognized in the Consolidated Statements of Operations Year Ended December 31, 2024 2023 2022 Interest expense, net $ (237) $ (251) $ (231) Description Location on consolidated Statements of Operations Net interest settlements and accruals on interest rate swaps Interest expense, net $ (96) $ (89) $ (8) Fair value changes on interest rate swaps Interest expense, net $ 14 $ 56 $ (228) Fair value changes on hedged debt Interest expense, net $ (14) $ (56) $ 228
Schedule of Net Investment Hedges, Notional Amount That Will Be Settled At Expiry	As of December 31, 2024, these hedges will expire and the notional amounts will be settled as follows unless terminated early at the discretion of the Company: Year Ending December 31, Notional Amount (Pay) Notional Amount (Receive) 2026 € 450 $ 500 2027 531 550 2028 588 600 2029 573 614 2031 481 500 2032 480 500 Total € 3,103 $ 3,264
Amount of Gain/(Loss) Recognized in AOCI on Derivative Net Investment Hedging Relationships	The following table provides information on the gains (losses) on the Company’s net investment and cash flow hedges: Amount of Gain (Loss) Recognized in AOCL on Derivative, net of Tax Amount of Gain (Loss) Reclassified from AOCL into Income, net of tax Gain (Loss) Recognized in Income on Derivative (Amount Excluded from Effectiveness Testing) Derivative and Non-Derivative Instruments in Net Investment Hedging Relationships Year Ended December 31, Year Ended December 31, Year Ended December 31, 2024 2023 2022 2024 2023 2022 2024 2023 2022 Cross currency swaps $ 157 $ (97) $ 99 $ — $ — $ — $ 47 $ 54 $ 56 Long-term debt 65 (35) 65 — — — — — — Total net investment hedges $ 222 $ (132) $ 164 $ — $ — $ — $ 47 $ 54 $ 56 Derivatives in Cash Flow Hedging Relationships Cross currency swaps $ — $ — $ — $ — $ 1 $ — $ — $ — $ — Interest rate contracts — — — (2) (2) (2) — — — Total cash flow hedges $ — $ — $ — $ (2) $ (1) $ (2) $ — $ — $ — Total $ 222 $ (132) $ 164 $ (2) $ (1) $ (2) $ 47 $ 54 $ 56
Components of Accumulated Other Comprehensive Income	The cumulative amount of net investment hedge and cash flow hedge gains (losses) remaining in AOCL is as follows: Cumulative Gains (Losses), net of tax December 31, 2024 December 31, 2023 Net investment hedges Cross currency swaps $ 178 $ 21 FX forwards 29 29 Long-term debt 68 3 Total net investment hedges 275 53 Cash flow hedges Interest rate contracts (43) (45) Cross currency swaps 1 1 Total cash flow hedges (42) (44) Total net gain in AOCL $ 233 $ 9 The following tables show changes in AOCL by component (net of tax): Year Ended December 31, 2024 Pension and Gains (Losses) on Cash Flow Hedges Foreign Net Investment Hedges Total Balance at December 31, 2023 $ (56) $ (44) $ (520) $ 53 $ (567) Other comprehensive income (loss) before reclassifications 19 — (312) 222 (71) Amounts reclassified from AOCL (2) 2 — — — Other comprehensive income (loss) 17 2 (312) 222 (71) Balance at December 31, 2024 $ (39) $ (42) $ (832) $ 275 $ (638) Year Ended December 31, 2023 Pension and Gains (Losses) on Cash Flow Hedges Foreign Net Investment Hedges Total Balance at December 31, 2022 $ (47) $ (45) $ (736) $ 185 $ (643) Other comprehensive income (loss) before reclassifications (6) — 216 (132) 78 Amounts reclassified from AOCL (3) 1 — — (2) Other comprehensive income (loss) (9) 1 216 (132) 76 Balance at December 31, 2023 $ (56) $ (44) $ (520) $ 53 $ (567) Year Ended December 31, 2022 Pension and Gains (Losses) on Cash Flow Hedges Foreign Net Investment Hedges Total Balance at December 31, 2021 $ (49) $ (47) $ (335) $ 21 $ (410) Other comprehensive income (loss) before reclassifications — — (421) 164 (257) Amounts reclassified from AOCL 2 2 20 — 24 Other comprehensive income (loss) 2 2 (401) 164 (233) Balance at December 31, 2022 $ (47) $ (45) $ (736) $ 185 $ (643)
Summary of Notional Amounts of Outstanding Derivative Positions	The following table summarizes the notional amounts of the Company’s outstanding foreign exchange forwards: December 31, 2024 December 31, 2023 Notional amount of currency pair (1) : Sell Buy Sell Buy Contracts to sell USD for GBP $ 604 £ 470 $ 513 £ 407 Contracts to sell USD for JPY $ 29 ¥ 4,000 $ 14 ¥ 2,000 Contracts to sell USD for CAD $ 35 C$ 50 $ 147 C$ 200 Contracts to sell USD for SGD $ 45 S$ 59 $ 50 S$ 67 Contracts to sell USD for EUR $ — € — $ 60 € 55 Contracts to sell USD for INR $ 23 ₹ 1,900 $ 23 ₹ 1,900 Contracts to sell EUR for USD € 12 $ 12 € — $ — Contracts to sell USD for AUD $ — A$ — $ 5 A$ 8 Contracts to sell CAD for USD C$ — $ — C$ 25 $ 19 (1) € = euro, £ = British pound, S$ = Singapore dollar, $ = U.S. dollar, ¥ = Japanese yen, C$ = Canadian dollar, ₹= Indian rupee, A$ = Australian dollar
Gains and Losses Recognized in Consolidated Statement of Operations on Derivatives Not Designated as Hedging instruments	The following table summarizes the impact to the consolidated statements of operations relating to the gains (losses) on the Company’s derivatives which are not designated as hedging instruments: Year Ended December 31, Derivatives not designated as accounting hedges Location on Consolidated Statements of Operations 2024 2023 2022 FX forwards Other non-operating income, net $ (24) $ 15 $ (72) Total return swaps Operating expense $ 5 $ 2 $ — Total return swaps SG&A expense $ 1 $ 1 $ —
Fair Value of Derivative Instruments	The table below shows the classification between assets and liabilities on the Company’s consolidated balance sheets for the fair value of the derivative instruments as well as the carrying value of its non-derivative debt instruments designated and qualifying as net investment hedges: Derivative and Non-derivative Instruments Consolidated Balance Sheet Location December 31, 2024 December 31, 2023 Assets: Derivatives designated as accounting hedges: Cross currency swaps designated as net investment hedges Other assets $ 58 $ 3 Total derivatives designated as accounting hedges 58 3 Derivatives not designated as accounting hedges: FX forwards on certain assets and liabilities Other current assets — 13 Total assets $ 58 $ 16 Liabilities: Derivatives designated as accounting hedges: Interest rate swaps designated as fair value hedges Accounts payable and accrued liabilities $ 3 $ — Cross currency swaps designated as net investment hedges Other liabilities 26 183 Interest rate swaps designated as fair value hedges Other liabilities 166 183 Total derivatives designated as accounting hedges 195 366 Non-derivatives designated as accounting hedges: Long-term debt designated as net investment hedge Long-term debt 1,294 1,381 Derivatives not designated as accounting hedges: FX forwards on certain assets and liabilities Accounts payable and accrued liabilities 21 — Total liabilities $ 1,510 $ 1,747

PROPERTY AND EQUIPMENT, NET (Ta

PROPERTY AND EQUIPMENT, NET (Tables)	12 Months Ended
	Dec. 31, 2024
Property, Plant and Equipment [Abstract]
Property and Equipment, Net	Property and equipment, net consisted of: December 31, 2024 2023 Office and computer equipment (3 - 10 year estimated useful life) $ 400 $ 354 Office furniture and fixtures (3 - 10 year estimated useful life) 57 57 Internal-use computer software (1 - 10 year estimated useful life) 1,417 1,232 Leasehold improvements and building (1 - 20 year estimated useful life) 235 232 Total property and equipment, at cost 2,109 1,875 Less: accumulated depreciation and amortization (1,453) (1,272) Total property and equipment, net $ 656 $ 603

GOODWILL AND OTHER ACQUIRED I_2

GOODWILL AND OTHER ACQUIRED INTANGIBLE ASSETS (Tables)	12 Months Ended
	Dec. 31, 2024
Goodwill and Intangible Assets Disclosure [Abstract]
Activity in Goodwill	The following tables summarize the activity in goodwill: Year Ended December 31, 2024 MA MIS Consolidated Gross Accumulated Net Gross Accumulated Net Gross Accumulated Net Balance at beginning of year $ 5,681 $ (12) $ 5,669 $ 287 $ — $ 287 $ 5,968 $ (12) $ 5,956 Additions/ adjustments (1) 112 — 112 97 — 97 209 — 209 Foreign currency translation adjustments (167) — (167) (4) — (4) (171) — (171) Ending Balance $ 5,626 $ (12) $ 5,614 $ 380 $ — $ 380 $ 6,006 $ (12) $ 5,994 Year Ended December 31, 2023 MA MIS Consolidated Gross Accumulated Net Gross Accumulated Net Gross Accumulated Net Balance at beginning of year $ 5,474 $ (12) $ 5,462 $ 377 $ — $ 377 $ 5,851 $ (12) $ 5,839 Additions/ adjustments (2) 90 — 90 (87) — (87) 3 — 3 Foreign currency translation adjustments 117 — 117 (3) — (3) 114 — 114 Ending balance $ 5,681 $ (12) $ 5,669 $ 287 $ — $ 287 $ 5,968 $ (12) $ 5,956 (1) The 2024 additions/adjustments primarily relate to certain immaterial acquisitions in 2024 (most notably GCR, Numerated and Praedicat). (2) The 2023 additions/adjustments primarily relate to a reallocation of goodwill pursuant to a realignment of certain components of the Company's ESG business in the first quarter of 2023
Acquired Intangible Assets and Related Amortization	Acquired intangible assets and related accumulated amortization consisted of: December 31, 2024 2023 Customer relationships $ 2,035 $ 2,065 Accumulated amortization (631) (556) Net customer relationships 1,404 1,509 Software/product technology 695 674 Accumulated amortization (419) (364) Net software/product technology 276 310 Database 166 179 Accumulated amortization (89) (82) Net database 77 97 Trade names 199 199 Accumulated amortization (83) (72) Net trade names 116 127 Other (1) 67 52 Accumulated amortization (50) (46) Net other 17 6 Total $ 1,890 $ 2,049 (1) Other intangible assets primarily consist of trade secrets, covenants not to compete, and acquired ratings methodologies and models.
Amortization Expense Relating to Acquired Intangible Assets	Amortization expense relating to acquired intangible assets is as follows: Year Ended December 31, 2024 2023 2022 Amortization expense (1) $ 198 $ 198 $ 200 (1) Amount for the year ended December 31, 2024 excludes incremental amortization expense of $5 million associated with amortizable intangible assets which is presented within charges related to asset abandonment on the consolidated statement of operations, as more fully discussed in Note 22 to the consolidated financial statements.
Estimated Future Amortization Expense for Acquired Intangible Assets Subject to Amortization	Estimated future annual amortization expense for intangible assets subject to amortization is as follows: Year Ending December 31, 2025 $ 202 2026 196 2027 178 2028 166 2029 133 Thereafter 1,015 Total estimated future amortization $ 1,890

RESTRUCTURING (Tables)

RESTRUCTURING (Tables)	12 Months Ended
	Dec. 31, 2024
Restructuring and Related Activities [Abstract]
Restructuring Expenses Included in Consolidated Statements of Operations	Total expenses included in the accompanying consolidated statements of operations related to the aforementioned restructuring programs are outlined below: Year ended December 31, Cumulative expense incurred 2024 2023 2022 2022 - 2023 Geolocation Restructuring Program Employee Termination Costs $ 14 $ 51 $ 85 $ 150 Real Estate Related Costs (1) — 36 27 63 Other Costs (2) — — 1 1 Total 2022-2023 Geolocation Restructuring Program Costs $ 14 $ 87 $ 113 $ 214 Strategic and Operational Efficiency Restructuring Program Employee Termination Costs (3) $ 41 $ — $ — $ 41 Other Costs (2) 4 — — 4 Total Strategic and Operational Efficiency Restructuring Program Costs $ 45 $ — $ — $ 45 Total Restructuring $ 59 $ 87 $ 113 (1) For the year ended December 31, 2023, primarily includes ROU Asset impairment charges. For the year ended December 31, 2022, primarily includes ROU Asset and leasehold improvement impairment charges and the non-cash acceleration of amortization of abandoned ROU Assets and leasehold improvements. The fair value of the impaired assets in both periods was determined by utilizing the present value of the estimated future cash flows attributable to the assets. The fair value of those assets subsequent to the impairment for the year ended December 31, 2023 was $4 million and was categorized as Level 3 within the ASC Topic 820 fair value hierarchy. The fair value of those assets subsequent to the impairment for the year ended December 31, 2022 was $0. (2) Primarily includes professional service fees related to execution of the restructuring program. (3) Primarily includes severance costs and expense related to the modification of equity awards. The table below shows cumulative restructuring expense incurred through December 31, 2024 by reportable segment. MA MIS Total 2022 - 2023 Geolocation Restructuring Program $ 116 $ 98 $ 214 Strategic and Operational Efficiency Restructuring Program $ 34 $ 11 $ 45
Changes to the Restructuring Liability	Changes to the restructuring liability for the aforementioned restructuring programs were as follows: 2024 2023 2022 Balance as of January 1 $ 36 $ 64 $ — 2022 - 2023 Geolocation Restructuring Program: Cost incurred and adjustments 14 51 86 Cash payments (42) (79) (22) Strategic and Operational Efficiency Restructuring Program: Cost incurred and adjustments 44 — — Cash payments (5) — — Balance as of December 31 (1) $ 47 $ 36 $ 64 (1) Restructuring liability is primarily comprised of employee termination costs and other severance-related charges.

FAIR VALUE (Tables)

FAIR VALUE (Tables)	12 Months Ended
	Dec. 31, 2024
Fair Value Disclosures [Abstract]
Financial Instruments Carried at Fair Value on Recurring Basis	The tables below present information about items that are carried at fair value at December 31, 2024 and 2023: Fair value Measurement as of December 31, 2024 Description Balance Level 1 Level 2 Assets: Derivatives (1) $ 58 $ — $ 58 Money market funds/mutual funds 108 108 — Total $ 166 $ 108 $ 58 Liabilities: Derivatives (1) $ 216 $ — $ 216 Total $ 216 $ — $ 216 Fair Value Measurement as of December 31, 2023 Description Balance Level 1 Level 2 Assets: Derivatives (1) $ 16 $ — $ 16 Money market funds/mutual funds 107 107 — Total $ 123 $ 107 $ 16 Liabilities: Derivatives (1) $ 366 $ — $ 366 Total $ 366 $ — $ 366 (1) Represents fair value of certain derivative contracts as more fully described in Note 6 to the consolidated financial statements.

OTHER BALANCE SHEET INFORMATI_2

OTHER BALANCE SHEET INFORMATION (Tables)	12 Months Ended
	Dec. 31, 2024
Other Balance Sheet Information [Abstract]
Additional Details Related to Certain Balance Sheet Captions	The following tables contain additional detail related to certain balance sheet captions: December 31, 2024 2023 Other current assets: Prepaid taxes $ 81 $ 115 Prepaid expenses 179 133 Capitalized costs to obtain and fulfill sales contracts 131 116 Foreign exchange forwards on certain assets and liabilities — 13 Interest receivable on interest rate and cross currency swaps 77 79 Other 47 33 Total other current assets $ 515 $ 489 December 31, 2024 2023 Other assets: Investments in non-consolidated affiliates $ 465 $ 521 Deposits for real-estate leases 15 16 Indemnification assets related to acquisitions 109 111 Mutual funds, certificates of deposit and money market deposit accounts/funds 98 100 Company owned life insurance (at contract value) 48 47 Capitalized costs to obtain sales contracts 214 196 Derivative instruments designated as accounting hedges 58 3 Pension and other retirement employee benefits 60 41 Other 99 103 Total other assets $ 1,166 $ 1,138 December 31, 2024 2023 Accounts payable and accrued liabilities: Salaries and benefits $ 133 $ 130 Incentive compensation 452 345 Customer credits, advanced payments and advanced billings 142 105 Dividends 32 7 Professional service fees 38 46 Interest accrued on debt 92 83 Accounts payable 53 23 Income taxes 144 108 Pension and other retirement employee benefits 11 15 Accrued royalties 25 24 FX forwards on certain assets and liabilities 21 — Restructuring liability 46 35 Derivative instruments designated as accounting hedges 3 — Interest payable on interest rate and cross currency swaps 60 67 Other 92 88 Total accounts payable and accrued liabilities $ 1,344 $ 1,076 December 31, 2024 2023 Other liabilities: Pension and other retirement employee benefits $ 195 $ 190 Interest accrued on UTPs 47 36 MAKS indemnification provisions 19 19 Income tax liability – non-current portion 12 15 Derivative instruments designated as accounting hedges 192 366 Other 52 50 Total other liabilities $ 517 $ 676
Investments in and Advances to Affiliates	The following table provides additional detail regarding Moody's investments in non-consolidated affiliates, as included in other assets in the consolidated balance sheets: December 31, 2024 2023 Equity method investments (1) $ 127 $ 186 Investments measured using the measurement alternative (2) 328 327 Other 10 8 Total investments in non-consolidated affiliates $ 465 $ 521 (1) Equity securities in which the Company has significant influence over the investee but does not have a controlling financial interest in accordance with ASC Topic 323. (2) Equity securities without readily determinable fair value for which the Company has elected to apply the measurement alternative in accordance with ASC Topic 321, which is more fully discussed in Note 2.

COMPREHENSIVE INCOME AND ACCU_2

COMPREHENSIVE INCOME AND ACCUMULATED OTHER COMPREHENSIVE INCOME (Tables)	12 Months Ended
	Dec. 31, 2024
Equity [Abstract]
Components of Accumulated Other Comprehensive Income	The cumulative amount of net investment hedge and cash flow hedge gains (losses) remaining in AOCL is as follows: Cumulative Gains (Losses), net of tax December 31, 2024 December 31, 2023 Net investment hedges Cross currency swaps $ 178 $ 21 FX forwards 29 29 Long-term debt 68 3 Total net investment hedges 275 53 Cash flow hedges Interest rate contracts (43) (45) Cross currency swaps 1 1 Total cash flow hedges (42) (44) Total net gain in AOCL $ 233 $ 9 The following tables show changes in AOCL by component (net of tax): Year Ended December 31, 2024 Pension and Gains (Losses) on Cash Flow Hedges Foreign Net Investment Hedges Total Balance at December 31, 2023 $ (56) $ (44) $ (520) $ 53 $ (567) Other comprehensive income (loss) before reclassifications 19 — (312) 222 (71) Amounts reclassified from AOCL (2) 2 — — — Other comprehensive income (loss) 17 2 (312) 222 (71) Balance at December 31, 2024 $ (39) $ (42) $ (832) $ 275 $ (638) Year Ended December 31, 2023 Pension and Gains (Losses) on Cash Flow Hedges Foreign Net Investment Hedges Total Balance at December 31, 2022 $ (47) $ (45) $ (736) $ 185 $ (643) Other comprehensive income (loss) before reclassifications (6) — 216 (132) 78 Amounts reclassified from AOCL (3) 1 — — (2) Other comprehensive income (loss) (9) 1 216 (132) 76 Balance at December 31, 2023 $ (56) $ (44) $ (520) $ 53 $ (567) Year Ended December 31, 2022 Pension and Gains (Losses) on Cash Flow Hedges Foreign Net Investment Hedges Total Balance at December 31, 2021 $ (49) $ (47) $ (335) $ 21 $ (410) Other comprehensive income (loss) before reclassifications — — (421) 164 (257) Amounts reclassified from AOCL 2 2 20 — 24 Other comprehensive income (loss) 2 2 (401) 164 (233) Balance at December 31, 2022 $ (47) $ (45) $ (736) $ 185 $ (643)

PENSION AND OTHER RETIREMENT _2

PENSION AND OTHER RETIREMENT BENEFITS (Tables)	12 Months Ended
	Dec. 31, 2024
Retirement Benefits [Abstract]
Summary of Changes in Benefit Obligations and Fair Value of Plan Assets for Retirement Plans	The following is a summary of changes in benefit obligations and fair value of plan assets for the Retirement Plans for the years ended December 31: Pension Plans Other Retirement Plans 2024 2023 2024 2023 Change in benefit obligation: Benefit obligation, beginning of the period $ (484) $ (462) $ (42) $ (39) Service cost (10) (11) (3) (3) Interest cost (22) (22) (2) (2) Plan participants’ contributions — — (2) (1) Benefits paid 24 30 3 2 Actuarial (loss) gain — (4) — 2 Assumption changes 28 (15) 4 (1) Benefit obligation, end of the period $ (464) $ (484) $ (42) $ (42) Change in plan assets: Fair value of plan assets, beginning of the period $ 449 $ 420 $ — $ — Actual return on plan assets 24 48 — — Benefits paid (24) (30) (3) (2) Employer contributions 11 11 1 1 Plan participants’ contributions — — 2 1 Fair value of plan assets, end of the period $ 460 $ 449 $ — $ — Funded status of the plans $ (4) $ (35) $ (42) $ (42) Amounts recorded on the consolidated balance sheets: Pension and retirement benefits asset – non current $ 60 $ 40 $ — $ — Pension and retirement benefits liability – current (8) (13) (2) (2) Pension and retirement benefits liability – non current (56) (62) (40) (40) Net amount recognized $ (4) $ (35) $ (42) $ (42) Accumulated benefit obligation, end of the period $ (436) $ (453)
Accumulated Benefit Obligation in Excess of Plan Assets	The following information is for those pension plans with an accumulated benefit obligation in excess of plan assets: December 31, 2024 2023 Aggregate projected benefit obligation $ 65 $ 75 Aggregate accumulated benefit obligation $ 57 $ 67
Summary of Pre-Tax Net Actuarial Losses and Prior Service Cost Recognized in AOCI	The following table summarizes the pre-tax net actuarial losses and prior service costs recognized in AOCL for the Company’s Retirement Plans as of December 31: Pension Plans Other Retirement Plans 2024 2023 2024 2023 Net actuarial gains (losses) $ (61) $ (82) $ 13 $ 10 Net prior service credits 1 1 — — Total recognized in AOCL – pre-tax $ (60) $ (81) $ 13 $ 10
Components of Net Periodic Benefit Expense Related to Retirement Plans	Net periodic pension expenses (income) recognized for the Retirement Plans are as follows for the years ended December 31: Pension Plans Other Retirement Plans 2024 2023 2022 2024 2023 2022 Components of net periodic expense (income) Service cost $ 10 $ 11 $ 14 $ 3 $ 3 $ 4 Interest cost 22 22 15 2 2 1 Expected return on plan assets (30) (32) (26) — — — Amortization of net actuarial (gains) losses and prior service credits from earlier periods — (1) 3 (1) (1) — (Gain) loss on settlement of pension obligations (1) (2) — — — — Net periodic expense (income) $ 1 $ (2) $ 6 $ 4 $ 4 $ 5
Summary of Pre-Tax Amounts Recorded in OCI	The following table summarizes the pre-tax amounts recorded in OCI related to the Company’s Retirement Plans for the years ended December 31: Pension Plans Other Retirement Plans 2024 2023 2022 2024 2023 2022 Amortization of net actuarial (gains) losses and prior service credit $ (1) $ (1) $ 3 $ (1) $ (1) $ — (Gain) loss on settlement of pension obligations (1) (2) — — — — Net actuarial gain (loss) arising during the period 22 (3) (19) 4 1 13 Total recognized in OCI – pre-tax $ 20 $ (6) $ (16) $ 3 $ — $ 13
Weighted-average Assumptions Used to Determine Benefit Obligations and Net Periodic Benefit Expenses	Weighted-average assumptions used to determine benefit obligations at December 31: Pension Plans Other Retirement Plans 2024 2023 2024 2023 Discount rate 5.43 % 4.73 % 5.40 % 4.75 % Rate of compensation increase 3.60 % 3.60 % — — Cash balance plan interest crediting rate 4.78 % 4.50 % — — Weighted-average assumptions used to determine net periodic benefit expense for years ended December 31: Pension Plans Other Retirement Plans 2024 2023 2022 2024 2023 2022 Discount rate 4.73 % 4.93 % 2.60 % 4.75 % 4.90 % 2.65 % Expected return on plan assets 6.10 % 6.55 % 5.05 % — — — Rate of compensation increase 3.60 % 3.63 % 3.63 % — — — Cash balance plan interest crediting rate 4.50 % 4.50 % 4.50 % — — —
Summary of Pension Plan Assets by Category Based on Hierarchy of Fair Value Measurements	Fair value of the assets in the Company’s funded pension plan by asset category at December 31, 2024 and 2023 are as follows: Fair Value Measurement as of December 31, 2024 Asset Category Balance Level 1 Level 2 Measured using NAV practical expedient (1) % of total Cash and cash equivalents $ 2 $ — $ 2 $ — — % Common/collective trust funds—equity securities U.S. large-cap 114 — 114 — 25 % U.S. small and mid-cap 25 — 25 — 5 % Total equity investments 139 — 139 — 30 % Emerging markets bond fund 30 — — 30 7 % Common/collective trust funds and corporate bonds—fixed income securities Intermediate-term investment grade U.S. government/ corporate bonds 57 — 57 — 12 % Mutual funds Long duration corporate bonds 146 — 146 — 32 % U.S. Treasury Inflation-Protected Securities (TIPs) 26 26 — — 6 % Emerging markets equity mutual fund 21 — 21 — 5 % Private investment fund—high yield securities 15 — — 15 3 % Total fixed-income investments 295 26 224 45 65 % Other investment—private real estate fund 24 — — 24 5 % Total Assets $ 460 $ 26 $ 365 $ 69 100 % Fair Value Measurement as of December 31, 2023 Asset Category Balance Level 1 Level 2 Measured using NAV practical expedient (1) % of total Cash and cash equivalents $ 5 $ — $ 5 $ — 1 % Common/collective trust funds—equity securities U.S. large-cap 106 — 106 — 24 % U.S. small and mid-cap 21 — 21 — 5 % Emerging markets 20 — 20 — 4 % Total equity investments 147 — 147 — 33 % Emerging markets bond fund 29 — — 29 6 % Common/collective trust funds and corporate bonds—fixed income securities Intermediate-term investment grade U.S. government/ corporate bonds 60 — 60 — 13 % Mutual funds Long duration corporate bonds 144 — 144 — 32 % U.S. Treasury Inflation-Protected Securities (TIPs) 25 25 — — 6 % Private investment fund—high yield securities 14 — — 14 3 % Total fixed-income investments 272 25 204 43 60 % Other investment—private real estate debt fund 25 — — 25 6 % Total Assets $ 449 $ 25 $ 356 $ 68 100 % (1) Investments are measured using the net asset value per share (or its equivalent) practical expedient and have not been categorized in the fair value hierarchy. The fair value amounts presented in the table are intended to permit a reconciliation of the fair value hierarchy to the value of the total plan assets.
Estimated Future Benefits Payments for Retirement Plans	Estimated future benefits payments for the Retirement Plans are as follows as of the year ended December 31, 2024: Year Ending December 31, Pension Plans Other Retirement Plans 2025 $ 28 $ 2 2026 28 2 2027 30 3 2028 31 3 2029 32 3 2030 - 2034 174 19

STOCK-BASED COMPENSATION PLANS

STOCK-BASED COMPENSATION PLANS (Tables)	12 Months Ended
	Dec. 31, 2024
Share-Based Payment Arrangement [Abstract]
Stock-Based Compensation Cost and Associated Tax Benefit	Presented below is a summary of the stock-based compensation expense and associated tax benefit in the accompanying consolidated statements of operations: Year Ended December 31, 2024 2023 2022 Stock-based compensation expense $ 221 $ 193 $ 169 Tax benefit $ 48 $ 45 $ 41
Weighted Average Assumptions used in Determining Fair Value for Options Granted	The following weighted average assumptions were used for options granted: Year Ended December 31, 2024 2023 2022 Expected dividend yield 0.91 % 1.04 % 0.86 % Expected stock volatility 28 % 29 % 27 % Risk-free interest rate 4.34 % 4.19 % 1.91 % Expected holding period (in years) 5.9 5.8 5.6 Grant date fair value $ 120.42 $ 94.71 $ 84.00
Share-based Payment Arrangement, Option and Stock Appreciation Rights, Activity	A summary of option activity as of December 31, 2024 and changes during the year then ended is presented below: Options Shares Weighted Average Exercise Price Per Share Weighted Average Remaining Contractual Term Aggregate Intrinsic Value Outstanding, December 31, 2023 0.8 $ 212.29 Granted 0.2 $ 372.52 Exercised (0.3) $ 173.64 Outstanding, December 31, 2024 0.7 $ 267.64 5.9 years $ 140 Vested and expected to vest, December 31, 2024 0.7 $ 267.26 5.9 years $ 139 Exercisable, December 31, 2024 0.4 $ 207.94 4.0 years $ 99
Stock Option Exercises and Restricted Stock Vesting	The following table summarizes information relating to stock option exercises: Year Ended December 31, 2024 2023 2022 Proceeds from stock option exercises $ 53 $ 32 $ 8 Aggregate intrinsic value $ 76 $ 58 $ 9 Tax benefit realized upon exercise $ 13 $ 14 $ 2
Share-based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity	A summary of nonvested restricted stock activity for the year ended December 31, 2024 is presented below: Nonvested Restricted Stock Shares Weighted Average Grant Date Fair Value Per Share Balance, December 31, 2023 1.3 $ 300.39 Granted 0.6 $ 373.54 Vested (0.5) $ 300.20 Forfeited (0.1) $ 327.53 Balance, December 31, 2024 1.3 $ 330.84 A summary of performance-based restricted stock activity for the year ended December 31, 2024 is presented below: Performance-based restricted stock Shares Weighted Average Grant Date Fair Value Per Share Balance, December 31, 2023 0.3 $ 308.12 Granted 0.1 $ 354.67 Vested (0.1) $ 331.60 Balance, December 31, 2024 0.3 $ 330.78
Share-based Compensation Arrangements by Share-based Payment Award, Restricted Stock Units, Vested and Expected to Vest	The following table summarizes information relating to the vesting of restricted stock awards: Year Ended December 31, 2024 2023 2022 Fair value of shares vested $ 199 $ 164 $ 180 Tax benefit realized upon vesting $ 48 $ 40 $ 42 The following table summarizes information relating to the vesting of the Company’s performance-based restricted stock awards: Year Ended December 31, 2024 2023 2022 Fair value of shares vested $ 40 $ 24 $ 50 Tax benefit realized upon vesting $ 9 $ 3 $ 7

INCOME TAXES (Tables)

INCOME TAXES (Tables)	12 Months Ended
	Dec. 31, 2024
Income Tax Disclosure [Abstract]
Provision for Income Taxes	Components of the Company’s income tax provision are as follows: Year Ended December 31, 2024 2023 2022 Current: Federal $ 280 $ 76 $ 106 State and Local 106 67 17 Non-U.S. 316 222 215 Total current 702 365 338 Deferred: Federal (21) (14) 57 State and Local (6) (4) 10 Non-U.S. (35) (20) (19) Total deferred (62) (38) 48 Total provision for income taxes $ 640 $ 327 $ 386
Reconciliation of United States Federal Statutory Tax Rate to Effective Tax Rate on Income before Provision for Income Taxes	A reconciliation of the U.S. federal statutory tax rate to the Company’s ETR on income before provision for income taxes is as follows: Year Ended December 31, 2024 2023 2022 U.S. statutory tax rate 21.0 % 21.0 % 21.0 % State and local taxes, net of federal tax benefit 3.7 % 2.5 % 0.8 % Foreign operations (0.3) % 0.4 % (0.2) % Release of UTP reserves (0.4) % (5.7) % — % Other (0.3) % (1.3) % 0.3 % ETR 23.7 % 16.9 % 21.9 % Income tax paid $ 613 $ 344 $ 488
Source of Income before Provision for Income Taxes	The source of income before provision for income taxes is as follows: Year Ended December 31, 2024 2023 2022 U.S. $ 1,446 $ 892 $ 804 Non-U.S. 1,253 1,043 956 Income before provision for income taxes $ 2,699 $ 1,935 $ 1,760
Components of Deferred Tax Assets and Liabilities	The components of deferred tax assets and liabilities are as follows: December 31, 2024 2023 Deferred tax assets: Account receivable allowances $ 10 $ 9 Accumulated depreciation and amortization 9 19 Stock-based compensation 60 60 Accrued compensation and benefits 50 53 Capitalized costs 20 25 Operating lease liabilities 84 103 Deferred revenue 211 200 Net operating loss 58 38 Restructuring 6 7 Uncertain tax positions 33 29 Self-insured related reserves 7 6 Interest expense carryforward 20 8 Other 12 5 Total deferred tax assets 580 562 Deferred tax liabilities: Accumulated depreciation and amortization of intangible assets and capitalized software (522) (551) ROU Assets (56) (67) Capital gains (13) (20) Self-insured related income (7) (6) Deferred tax on unremitted foreign earnings (20) (14) Gain on net investment hedges - OCI (82) (5) Other (11) (19) Total deferred tax liabilities (711) (682) Net deferred tax liabilities (131) (120) Valuation allowance (25) (24) Total net deferred tax liabilities $ (156) $ (144)
Schedule of Unrecognized Tax Benefits Roll Forward	A reconciliation of the beginning and ending amount of UTPs is as follows: Year Ended December 31, 2024 2023 2022 Balance as of January 1 $ 196 $ 322 $ 388 Additions for tax positions related to the current year 33 21 12 Additions for tax positions of prior years 11 3 12 Reductions for tax positions of prior years (11) (17) (27) Settlements with taxing authorities (3) (108) (30) Lapse of statute of limitations (15) (25) (33) Balance as of December 31 $ 211 $ 196 $ 322

INDEBTEDNESS (Tables)

INDEBTEDNESS (Tables)	12 Months Ended
	Dec. 31, 2024
Debt Disclosure [Abstract]
Summary of Total Indebtedness	The following table summarizes total indebtedness: December 31, 2024 Notes Payable: Principal Amount Fair Value of Interest Rate Swaps (1) Unamortized (Discount) Premium Unamortized Debt Issuance Costs Carrying Value 5.25% 2014 Senior Notes, due 2044 $ 600 $ (32) $ 3 $ (4) $ 567 1.75% 2015 Senior Notes, due 2027 518 — — (1) 517 3.25% 2017 Senior Notes, due 2028 500 (13) (2) (1) 484 4.25% 2018 Senior Notes, due 2029 400 (35) (1) (1) 363 4.875% 2018 Senior Notes, due 2048 400 (35) (6) (3) 356 0.950% 2019 Senior Notes, due 2030 776 — (1) (3) 772 3.75% 2020 Senior Notes, due 2025 700 (3) — — 697 3.25% 2020 Senior Notes, due 2050 300 — (4) (3) 293 2.55% 2020 Senior Notes, due 2060 300 — (2) (3) 295 2.00% 2021 Senior Notes, due 2031 600 — (6) (4) 590 2.75% 2021 Senior Notes, due 2041 600 — (12) (5) 583 3.10% 2021 Senior Notes, due 2061 500 — (7) (5) 488 3.75% 2022 Senior Notes, due 2052 500 (43) (8) (5) 444 4.25% 2022 Senior Notes, due 2032 500 (8) (2) (3) 487 5.00% 2024 Senior Notes, due 2034 500 — (4) (4) 492 Total debt $ 7,694 $ (169) $ (52) $ (45) $ 7,428 Current portion (697) Total long-term debt $ 6,731 December 31, 2023 Notes Payable: Principal Amount Fair Value of Interest Rate Swaps (1) Unamortized (Discount) Premium Unamortized Debt Issuance Costs Carrying Value 5.25% 2014 Senior Notes, due 2044 $ 600 $ (34) $ 3 $ (4) $ 565 1.75% 2015 Senior Notes due 2027 552 — — (1) 551 3.25% 2017 Senior Notes, due 2028 500 (26) (2) (2) 470 4.25% 2018 Senior Notes, due 2029 400 (34) (2) (2) 362 4.875% 2018 Senior Notes, due 2048 400 (36) (6) (3) 355 0.950% 2019 Senior Notes, due 2030 829 — (2) (4) 823 3.75% 2020 Senior Notes, due 2025 700 (16) (1) (1) 682 3.25% 2020 Senior Notes, due 2050 300 — (4) (3) 293 2.55% 2020 Senior Notes, due 2060 300 — (2) (3) 295 2.00% 2021 Senior Notes, due 2031 600 — (6) (4) 590 2.75% 2021 Senior Notes, due 2041 600 — (12) (5) 583 3.10% 2021 Senior Notes, due 2061 500 — (7) (5) 488 3.75% 2022 Senior Note, due 2052 500 (29) (8) (5) 458 4.25% 2022 Senior Note, due 2032 500 (8) (2) (4) 486 Total long-term debt $ 7,281 $ (183) $ (51) $ (46) $ 7,001 (1) The fair value of interest rate swaps in the tables above represents the cumulative amount of fair value hedging adjustments included in the carrying amount of the hedged debt.
Schedule of Credit Facilities	The 2024 Credit Facility replaces the Company's $1.25 billion 2021 Credit Facility that was scheduled to mature in December 2026. Further information on the key terms of these revolving credit facilities is below: December 31, 2024 December 31, 2023 Issue Date Capacity Maturity Drawn Undrawn Drawn Undrawn 2021 Credit Facility December 17, 2021 $ 1,250 December 17, 2026 (Terminated in 2024) $ — $ — $ — $ 1,250 2024 Credit Facility May 6, 2024 $ 1,250 May 6, 2029 $ — $ 1,250 $ — $ —
Principal Payments Due on Long-term Borrowings	The repayment schedule for the Company’s borrowings is as follows: Year Ending December 31, Total 2025 $ 700 2026 — 2027 518 2028 500 2029 400 Thereafter 5,576 Total $ 7,694
Summary of Components of Interest as Presented in Consolidated Statements of Operations	The following table summarizes the components of interest as presented in the consolidated statements of operations and the cash paid for interest: Year Ended December 31, 2024 2023 2022 Expense on borrowings (1) $ (300) $ (296) $ (216) (Expense) income on UTPs and other tax related liabilities (2) (13) 8 (13) Net periodic pension costs - interest component (26) (26) (17) Income 102 63 15 Interest expense, net $ (237) $ (251) $ (231) Interest paid (3) $ 280 $ 281 $ 198 (1) Expense on borrowings includes interest on long-term debt, as well as realized gains/losses related to interest rate swaps and cross currency swaps, which are more fully discussed in Note 6. (2) The amount for the year ended December 31, 2023 includes a $22 million reduction of tax-related interest expense primarily related to the resolutions of tax matters. (3) Interest paid includes net settlements on interest rate swaps more fully discussed in Note 6.
Fair Value and Carrying Value of Long-term Debt	The fair value and carrying value of the Company’s debt as of December 31, 2024 and 2023 are as follows: December 31, 2024 December 31, 2023 Carrying Amount Estimated Fair Value Carrying Amount Estimated Fair Value Total debt $ 7,428 $ 6,601 $ 7,001 $ 6,402

CAPITAL STOCK (Tables)

CAPITAL STOCK (Tables)	12 Months Ended
	Dec. 31, 2024
Stockholders' Equity Note [Abstract]
Share Repurchase Programs	The table below summarizes the Company’s remaining authority under its share repurchase program as of December 31, 2024: Date Authorized Amount Authorized Remaining Authority October 15, 2024 $ 1,500 $ 1,500 February 5, 2024 1,000 67 Total Remaining Authority at December 31, 2024 $ 1,567
Dividends Paid	The Company’s cash dividends were: Dividends Per Share Year ended December 31, 2024 2023 2022 Declared Paid Declared Paid Declared Paid First quarter $ 0.85 $ 0.85 $ 0.77 $ 0.77 $ 0.70 $ 0.70 Second quarter 0.85 0.85 0.77 0.77 0.70 0.70 Third quarter 0.85 0.85 0.77 0.77 0.70 0.70 Fourth quarter 0.85 0.85 0.77 0.77 0.70 0.70 Total $ 3.40 $ 3.40 $ 3.08 $ 3.08 $ 2.80 $ 2.80

LEASES (Tables)

LEASES (Tables)	12 Months Ended
	Dec. 31, 2024
Leases [Abstract]
Components of Lease Cost	The following table presents the components of the Company’s lease cost: Year ended December 31, 2024 2023 2022 Operating lease cost $ 88 $ 93 $ 102 Sublease income (7) (7) (7) Variable lease cost 22 22 20 Total lease cost $ 103 $ 108 $ 115
Schedule of Operating Leases Information	The following tables present other information related to the Company’s operating leases: Year ended December 31, 2024 2023 2022 Cash paid for amounts included in the measurement of operating lease liabilities $ 120 $ 119 $ 118 Right-of-use assets obtained in exchange for new operating lease liabilities $ 21 $ 40 $ 35 December 31, 2024 2023 2022 Weighted-average remaining lease term (in years) 3.8 4.4 4.9 Weighted-average discount rate applied to operating leases 3.2 % 3.2 % 3.1 %
Lessee, Operating Lease, Liability, Maturity	The following table presents a maturity analysis of the future minimum lease payments included within the Company’s operating lease liabilities at December 31, 2024: Year Ending December 31, Operating Leases 2025 $ 111 2026 91 2027 74 2028 23 2029 19 Thereafter 20 Total lease payments (undiscounted) 338 Less: Interest 20 Present value of lease liabilities: $ 318 Lease liabilities - current $ 102 Lease liabilities - noncurrent $ 216

SEGMENT INFORMATION (Tables)

SEGMENT INFORMATION (Tables)	12 Months Ended
	Dec. 31, 2024
Segment Reporting [Abstract]
Financial Information by Segment	The table below presents revenue, significant expenses regularly provided to the CODM and Adjusted Operating Income by reportable segment. The CODM, identified as the Company's CEO, utilizes the Adjusted Operating Income measure to assess the profitability of the Company and each of its reportable segments each quarter. Adjusted Operating Income is also used in our budgeting and forecasting processes, enabling the allocation of capital resources across the Company's strategic initiatives. Year Ended December 31, 2024 2023 MA MIS Eliminations Consolidated MA MIS Eliminations Consolidated Total external revenue $ 3,295 $ 3,793 $ — $ 7,088 $ 3,056 $ 2,860 $ — $ 5,916 Intersegment revenue 13 193 (206) — 13 186 (199) — Revenue 3,308 3,986 (206) 7,088 3,069 3,046 (199) 5,916 Compensation expense 1,370 1,169 — 2,539 1,238 1,003 — 2,241 Non-compensation expense 731 410 — 1,141 708 370 — 1,078 Intersegment expense 193 13 (206) — 186 13 (199) — Operating, SG&A 2,294 1,592 (206) 3,680 2,132 1,386 (199) 3,319 Adjusted Operating Income 1,014 2,394 — 3,408 937 1,660 — 2,597 Add: Depreciation and amortization 353 78 — 431 298 75 — 373 Restructuring 42 17 — 59 59 28 — 87 Charges related to asset abandonment 43 — — 43 — — — — Operating Income $ 2,875 $ 2,137 Non-operating (expense) income, net $ (176) $ (202) Income before provision for income taxes $ 2,699 $ 1,935 Year Ended December 31, 2022 MA MIS Eliminations Consolidated Total external revenue $ 2,769 $ 2,699 $ — $ 5,468 Intersegment revenue 8 174 (182) — Revenue 2,777 2,873 (182) 5,468 Compensation expense 1,116 940 — 2,056 Non-compensation expense 647 437 — 1,084 Intersegment expense 174 8 (182) — Operating, SG&A 1,937 1,385 (182) 3,140 Adjusted Operating Income 840 1,488 — 2,328 Add: Depreciation and amortization 250 81 — 331 Restructuring 49 65 — 114 Operating income $ 1,883 Non-operating (expense) income, net $ (123) Income before provision for income taxes $ 1,760
Restructuring Expenses Included in Consolidated Statements of Operations	Total expenses included in the accompanying consolidated statements of operations related to the aforementioned restructuring programs are outlined below: Year ended December 31, Cumulative expense incurred 2024 2023 2022 2022 - 2023 Geolocation Restructuring Program Employee Termination Costs $ 14 $ 51 $ 85 $ 150 Real Estate Related Costs (1) — 36 27 63 Other Costs (2) — — 1 1 Total 2022-2023 Geolocation Restructuring Program Costs $ 14 $ 87 $ 113 $ 214 Strategic and Operational Efficiency Restructuring Program Employee Termination Costs (3) $ 41 $ — $ — $ 41 Other Costs (2) 4 — — 4 Total Strategic and Operational Efficiency Restructuring Program Costs $ 45 $ — $ — $ 45 Total Restructuring $ 59 $ 87 $ 113 (1) For the year ended December 31, 2023, primarily includes ROU Asset impairment charges. For the year ended December 31, 2022, primarily includes ROU Asset and leasehold improvement impairment charges and the non-cash acceleration of amortization of abandoned ROU Assets and leasehold improvements. The fair value of the impaired assets in both periods was determined by utilizing the present value of the estimated future cash flows attributable to the assets. The fair value of those assets subsequent to the impairment for the year ended December 31, 2023 was $4 million and was categorized as Level 3 within the ASC Topic 820 fair value hierarchy. The fair value of those assets subsequent to the impairment for the year ended December 31, 2022 was $0. (2) Primarily includes professional service fees related to execution of the restructuring program. (3) Primarily includes severance costs and expense related to the modification of equity awards. The table below shows cumulative restructuring expense incurred through December 31, 2024 by reportable segment. MA MIS Total 2022 - 2023 Geolocation Restructuring Program $ 116 $ 98 $ 214 Strategic and Operational Efficiency Restructuring Program $ 34 $ 11 $ 45
Company's Reportable Segment Revenues Disaggregated by Segment and Geographic Region	CONSOLIDATED REVENUE AND LONG-LIVED ASSETS INFORMATION BY GEOGRAPHIC AREA Year Ended December 31, 2024 2023 2022 Revenue: U.S. $ 3,836 $ 3,071 $ 2,865 Non-U.S.: EMEA 2,174 1,886 1,708 Asia-Pacific 629 570 539 Americas 449 389 356 Total Non-U.S. 3,252 2,845 2,603 Total $ 7,088 $ 5,916 $ 5,468 Long-lived assets at December 31: U.S. $ 4,395 $ 4,323 $ 4,408 Non-U.S. 4,361 4,562 4,489 Total $ 8,756 $ 8,885 $ 8,897

VALUATION AND QUALIFYING ACCO_2

VALUATION AND QUALIFYING ACCOUNTS (Tables)	12 Months Ended
	Dec. 31, 2024
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]
Summary of Activity for Valuation Allowances	Below is a summary of activity: Year Ended December 31, Balance at Beginning of the Year Charged to costs and expenses Deductions (1) Balance at End of the Year 2024 Allowances for credit losses $ (35) $ (15) $ 18 $ (32) Deferred tax assets—valuation allowance $ (24) $ (2) $ 1 $ (25) 2023 Allowances for credit losses $ (40) $ (22) $ 27 $ (35) Deferred tax assets—valuation allowance $ (21) $ (2) $ (1) $ (24) 2022 Allowances for credit losses $ (32) $ (25) $ 17 $ (40) Deferred tax assets—valuation allowance $ (18) $ (4) $ 1 $ (21) (1) Reflects write-off of uncollectible accounts receivable or expiration of foreign net operating tax losses.

OTHER NON-OPERATING (EXPENSE)_2

OTHER NON-OPERATING (EXPENSE) INCOME, NET (Tables)	12 Months Ended
	Dec. 31, 2024
Other Income and Expenses [Abstract]
Schedule of Other Nonoperating Income (Expense)	The following table summarizes the components of other non-operating income, net as presented in the consolidated statements of operations: Year Ended December 31, 2024 2023 2022 FX loss (1) $ — $ (30) $ (10) Net periodic pension income - non-service and non-interest cost components 30 35 24 Income/gain from investments in non-consolidated affiliates 15 19 17 Gain on previously held equity method investments (2) 7 — — Gain (loss) on investments 13 14 (14) Other (4) 11 21 Total $ 61 $ 49 $ 38 (1) The amount for the year ended December 31, 2023 includes a $23 million loss recorded pursuant to an immaterial out-of-period adjustment relating to the 2022 fiscal year. The amount for the year ended December 31, 2022 includes FX translation losses of $20 million reclassified to earnings resulting from the Company no longer conducting commercial operations in Russia. (2) The amount for the year ended December 31, 2024 reflects non-cash gains relating to the step-acquisitions of Praedicat and GCR.

Description of Business and B_2

Description of Business and Basis of Presentation - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2024 segment
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of reportable segments	2

Summary of Significant Accoun_3

Summary of Significant Accounting Policies - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2024 reportingUnit customer	Dec. 31, 2023 customer
Capitalized Contract Cost [Line Items]
Number of reporting units	4
Number of customers greater than 10% or more of accounts receivable | customer	0	0
MIS
Capitalized Contract Cost [Line Items]
Number of reporting units	2
MA
Capitalized Contract Cost [Line Items]
Number of reporting units	2
Subscription and Maintenance Contracts | MA | Minimum
Capitalized Contract Cost [Line Items]
Revenue, contractual coverage period (years)	3 years
General customer contract payment condition (days)	30 days
Subscription and Maintenance Contracts | MA | Maximum
Capitalized Contract Cost [Line Items]
Revenue, contractual coverage period (years)	5 years
General customer contract payment condition (days)	60 days

Revenues - Revenue by Category

Revenues - Revenue by Category (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Disaggregation of Revenue [Line Items]
Revenue	$ 7,088	$ 5,916	$ 5,468
Eliminations
Disaggregation of Revenue [Line Items]
Revenue	(206)	(199)	(182)
Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	7,088	5,916	5,468
Eliminations
Disaggregation of Revenue [Line Items]
Revenue	(206)	(199)	(182)
MA
Disaggregation of Revenue [Line Items]
Revenue	3,295	3,056	2,769
MA | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	3,308	3,069	2,777
MA | Eliminations
Disaggregation of Revenue [Line Items]
Revenue	13	13	8
MA | Total Decision Solutions | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	1,516	1,383	1,245
MA | Total Decision Solutions | Banking | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	551	521	481
MA | Total Decision Solutions | Insurance | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	598	550	504
MA | Total Decision Solutions | KYC | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	367	312	260
MA | Research and Insights | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	926	884	812
MA | Data and Information | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	853	789	712
MIS
Disaggregation of Revenue [Line Items]
Revenue	3,793	2,860	2,699
MIS | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	3,986	3,046	2,873
MIS | Eliminations
Disaggregation of Revenue [Line Items]
Revenue	193	186	174
MIS | Corporate finance (CFG) | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	1,950	1,404	1,269
MIS | Corporate finance (CFG) | Investment-grade | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	488	335	294
MIS | Corporate finance (CFG) | High-yield | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	285	150	108
MIS | Corporate finance (CFG) | Bank loans | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	527	292	275
MIS | Corporate finance (CFG) | Other accounts | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	650	627	592
MIS | Structured finance (SFG) | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	518	405	462
MIS | Structured finance (SFG) | Asset-backed securities | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	130	121	116
MIS | Structured finance (SFG) | RMBS | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	98	92	106
MIS | Structured finance (SFG) | CMBS | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	94	60	98
MIS | Structured finance (SFG) | Structured credit | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	193	129	140
MIS | Structured finance (SFG) | Other accounts | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	3	3	2
MIS | Financial institutions (FIG) | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	727	545	491
MIS | Financial institutions (FIG) | Banking | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	450	378	337
MIS | Financial institutions (FIG) | Insurance | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	214	123	113
MIS | Financial institutions (FIG) | Managed investments | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	49	32	28
MIS | Financial institutions (FIG) | Other accounts | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	14	12	13
MIS | Public, project and infrastructure finance (PPIF) | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	564	476	431
MIS | Public, project and infrastructure finance (PPIF) | Public finance / sovereign | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	240	205	197
MIS | Public, project and infrastructure finance (PPIF) | Project and infrastructure | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	324	271	234
MIS | Rating Revenue | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	3,759	2,830	2,653
MIS | MIS Other | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	$ 34	$ 30	$ 46

Revenues - Revenues Disaggregat

Revenues - Revenues Disaggregated by Line of Business and Geographical Area (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Disaggregation of Revenue [Line Items]
Revenue	$ 7,088	$ 5,916	$ 5,468
Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	7,088	5,916	5,468
U.S.
Disaggregation of Revenue [Line Items]
Revenue	3,836	3,071	2,865
Non-U.S.
Disaggregation of Revenue [Line Items]
Revenue	3,252	2,845	2,603
MA
Disaggregation of Revenue [Line Items]
Revenue	3,295	3,056	2,769
MA | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	3,308	3,069	2,777
MA | U.S.
Disaggregation of Revenue [Line Items]
Revenue	1,390	1,321	1,231
MA | U.S. | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	1,390	1,321	1,231
MA | Non-U.S.
Disaggregation of Revenue [Line Items]
Revenue	1,905	1,735	1,538
MA | Non-U.S. | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	1,905	1,735	1,538
MA | Total Decision Solutions | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	1,516	1,383	1,245
MA | Total Decision Solutions | U.S. | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	570	550	511
MA | Total Decision Solutions | Non-U.S. | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	946	833	734
MA | Research and Insights | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	926	884	812
MA | Research and Insights | U.S. | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	514	490	470
MA | Research and Insights | Non-U.S. | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	412	394	342
MA | Data and Information | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	853	789	712
MA | Data and Information | U.S. | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	306	281	250
MA | Data and Information | Non-U.S. | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	547	508	462
MIS
Disaggregation of Revenue [Line Items]
Revenue	3,793	2,860	2,699
MIS | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	3,986	3,046	2,873
MIS | U.S.
Disaggregation of Revenue [Line Items]
Revenue	2,446	1,750	1,634
MIS | U.S. | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	2,446	1,750	1,634
MIS | Non-U.S.
Disaggregation of Revenue [Line Items]
Revenue	1,347	1,110	1,065
MIS | Non-U.S. | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	1,347	1,110	1,065
MIS | Rating Revenue | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	3,759	2,830	2,653
MIS | Rating Revenue | U.S. | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	2,446	1,749	1,629
MIS | Rating Revenue | Non-U.S. | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	1,313	1,081	1,024
MIS | Corporate finance (CFG) | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	1,950	1,404	1,269
MIS | Corporate finance (CFG) | U.S. | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	1,333	952	832
MIS | Corporate finance (CFG) | Non-U.S. | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	617	452	437
MIS | Structured finance (SFG) | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	518	405	462
MIS | Structured finance (SFG) | U.S. | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	368	252	308
MIS | Structured finance (SFG) | Non-U.S. | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	150	153	154
MIS | Financial institutions (FIG) | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	727	545	491
MIS | Financial institutions (FIG) | U.S. | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	386	253	223
MIS | Financial institutions (FIG) | Non-U.S. | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	341	292	268
MIS | Public, project and infrastructure finance (PPIF) | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	564	476	431
MIS | Public, project and infrastructure finance (PPIF) | U.S. | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	359	292	266
MIS | Public, project and infrastructure finance (PPIF) | Non-U.S. | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	205	184	165
MIS | MIS Other | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	34	30	46
MIS | MIS Other | U.S. | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	0	1	5
MIS | MIS Other | Non-U.S. | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	$ 34	$ 29	$ 41

Revenues - Consolidated Revenue

Revenues - Consolidated Revenue Information by Geographic Area (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting Information [Line Items]
Revenue	$ 7,088	$ 5,916	$ 5,468
Operating Segments
Segment Reporting Information [Line Items]
Revenue	7,088	5,916	5,468
MA
Segment Reporting Information [Line Items]
Revenue	3,295	3,056	2,769
MA | Operating Segments
Segment Reporting Information [Line Items]
Revenue	3,308	3,069	2,777
MIS
Segment Reporting Information [Line Items]
Revenue	3,793	2,860	2,699
MIS | Operating Segments
Segment Reporting Information [Line Items]
Revenue	3,986	3,046	2,873
U.S.
Segment Reporting Information [Line Items]
Revenue	3,836	3,071	2,865
U.S. | MA
Segment Reporting Information [Line Items]
Revenue	1,390	1,321	1,231
U.S. | MA | Operating Segments
Segment Reporting Information [Line Items]
Revenue	1,390	1,321	1,231
U.S. | MIS
Segment Reporting Information [Line Items]
Revenue	2,446	1,750	1,634
U.S. | MIS | Operating Segments
Segment Reporting Information [Line Items]
Revenue	2,446	1,750	1,634
Non-U.S.
Segment Reporting Information [Line Items]
Revenue	3,252	2,845	2,603
Non-U.S. | MA
Segment Reporting Information [Line Items]
Revenue	1,905	1,735	1,538
Non-U.S. | MA | Operating Segments
Segment Reporting Information [Line Items]
Revenue	1,905	1,735	1,538
Non-U.S. | MIS
Segment Reporting Information [Line Items]
Revenue	1,347	1,110	1,065
Non-U.S. | MIS | Operating Segments
Segment Reporting Information [Line Items]
Revenue	1,347	1,110	1,065
EMEA
Segment Reporting Information [Line Items]
Revenue	2,174	1,886	1,708
EMEA | MA | Operating Segments
Segment Reporting Information [Line Items]
Revenue	1,306	1,207	1,060
EMEA | MIS | Operating Segments
Segment Reporting Information [Line Items]
Revenue	868	679	648
Asia-Pacific
Segment Reporting Information [Line Items]
Revenue	629	570	539
Asia-Pacific | MA | Operating Segments
Segment Reporting Information [Line Items]
Revenue	345	299	268
Asia-Pacific | MIS | Operating Segments
Segment Reporting Information [Line Items]
Revenue	284	271	271
Americas
Segment Reporting Information [Line Items]
Revenue	449	389	356
Americas | MA | Operating Segments
Segment Reporting Information [Line Items]
Revenue	254	229	210
Americas | MIS | Operating Segments
Segment Reporting Information [Line Items]
Revenue	$ 195	$ 160	$ 146

Revenues - Transaction and Rela

Revenues - Transaction and Relationship Revenue (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Disaggregation of Revenue [Line Items]
Revenue	$ 7,088	$ 5,916	$ 5,468
Percentage of Revenues	100%	100%	100%
Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	$ 7,088	$ 5,916	$ 5,468
MA
Disaggregation of Revenue [Line Items]
Revenue	3,295	3,056	2,769
MA | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	$ 3,308	$ 3,069	$ 2,777
Percentage of Revenues	100%	100%	100%
MIS
Disaggregation of Revenue [Line Items]
Revenue	$ 3,793	$ 2,860	$ 2,699
MIS | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	$ 3,986	$ 3,046	$ 2,873
Percentage of Revenues	100%	100%	100%
Banking | MA | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	$ 551	$ 521	$ 481
Percentage of Revenues	100%	100%	100%
Insurance | MA | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	$ 598	$ 550	$ 504
Percentage of Revenues	100%	100%	100%
KYC | MA | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	$ 367	$ 312	$ 260
Percentage of Revenues	100%	100%	100%
Corporate finance (CFG) | MIS | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	$ 1,950	$ 1,404	$ 1,269
Percentage of Revenues	100%	100%	100%
Structured finance (SFG) | MIS | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	$ 518	$ 405	$ 462
Percentage of Revenues	100%	100%	100%
Financial institutions (FIG) | MIS | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	$ 727	$ 545	$ 491
Percentage of Revenues	100%	100%	100%
Public, project and infrastructure finance (PPIF) | MIS | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	$ 564	$ 476	$ 431
Percentage of Revenues	100%	100%	100%
MIS Other | MIS | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	$ 34	$ 30	$ 46
Percentage of Revenues	100%	100%	100%
Total Decision Solutions | MA | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	$ 1,516	$ 1,383	$ 1,245
Percentage of Revenues	100%	100%	100%
Research and Insights | MA | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	$ 926	$ 884	$ 812
Percentage of Revenues	100%	100%	100%
Data and Information | MA | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	$ 853	$ 789	$ 712
Percentage of Revenues	100%	100%	100%
Transaction Revenue
Disaggregation of Revenue [Line Items]
Revenue	$ 2,678	$ 1,826	$ 1,682
Percentage of Revenues	38%	31%	31%
Transaction Revenue | MA
Disaggregation of Revenue [Line Items]
Revenue	$ 161	$ 188	$ 170
Transaction Revenue | MA | Operating Segments
Disaggregation of Revenue [Line Items]
Percentage of Revenues	5%	6%	6%
Transaction Revenue | MIS
Disaggregation of Revenue [Line Items]
Revenue	$ 2,517	$ 1,638	$ 1,512
Transaction Revenue | MIS | Operating Segments
Disaggregation of Revenue [Line Items]
Percentage of Revenues	66%	57%	56%
Transaction Revenue | Banking | MA | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	$ 117	$ 130	$ 124
Percentage of Revenues	21%	25%	26%
Transaction Revenue | Insurance | MA | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	$ 23	$ 38	$ 28
Percentage of Revenues	4%	7%	6%
Transaction Revenue | KYC | MA | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	$ 2	$ 1	$ 1
Percentage of Revenues	1%	0%	0%
Transaction Revenue | Corporate finance (CFG) | MIS | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	$ 1,415	$ 887	$ 772
Percentage of Revenues	73%	63%	61%
Transaction Revenue | Structured finance (SFG) | MIS | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	$ 292	$ 190	$ 262
Percentage of Revenues	56%	47%	57%
Transaction Revenue | Financial institutions (FIG) | MIS | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	$ 418	$ 254	$ 211
Percentage of Revenues	57%	47%	43%
Transaction Revenue | Public, project and infrastructure finance (PPIF) | MIS | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	$ 384	$ 301	$ 263
Percentage of Revenues	68%	63%	61%
Transaction Revenue | MIS Other | MIS | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	$ 8	$ 6	$ 4
Percentage of Revenues	24%	20%	9%
Transaction Revenue | Total Decision Solutions | MA | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	$ 142	$ 169	$ 153
Percentage of Revenues	9%	12%	12%
Transaction Revenue | Research and Insights | MA | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	$ 15	$ 16	$ 17
Percentage of Revenues	2%	2%	2%
Transaction Revenue | Data and Information | MA | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	$ 4	$ 3	$ 0
Percentage of Revenues	0%	0%	0%
Relationship Revenue
Disaggregation of Revenue [Line Items]
Revenue	$ 4,410	$ 4,090	$ 3,786
Percentage of Revenues	62%	69%	69%
Relationship Revenue | MA
Disaggregation of Revenue [Line Items]
Revenue	$ 3,134	$ 2,868	$ 2,599
Relationship Revenue | MA | Operating Segments
Disaggregation of Revenue [Line Items]
Percentage of Revenues	95%	94%	94%
Relationship Revenue | MIS
Disaggregation of Revenue [Line Items]
Revenue	$ 1,276	$ 1,222	$ 1,187
Relationship Revenue | MIS | Operating Segments
Disaggregation of Revenue [Line Items]
Percentage of Revenues	34%	43%	44%
Relationship Revenue | Banking | MA | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	$ 434	$ 391	$ 357
Percentage of Revenues	79%	75%	74%
Relationship Revenue | Insurance | MA | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	$ 575	$ 512	$ 476
Percentage of Revenues	96%	93%	94%
Relationship Revenue | KYC | MA | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	$ 365	$ 311	$ 259
Percentage of Revenues	99%	100%	100%
Relationship Revenue | Corporate finance (CFG) | MIS | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	$ 535	$ 517	$ 497
Percentage of Revenues	27%	37%	39%
Relationship Revenue | Structured finance (SFG) | MIS | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	$ 226	$ 215	$ 200
Percentage of Revenues	44%	53%	43%
Relationship Revenue | Financial institutions (FIG) | MIS | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	$ 309	$ 291	$ 280
Percentage of Revenues	43%	53%	57%
Relationship Revenue | Public, project and infrastructure finance (PPIF) | MIS | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	$ 180	$ 175	$ 168
Percentage of Revenues	32%	37%	39%
Relationship Revenue | MIS Other | MIS | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	$ 26	$ 24	$ 42
Percentage of Revenues	76%	80%	91%
Relationship Revenue | Total Decision Solutions | MA | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	$ 1,374	$ 1,214	$ 1,092
Percentage of Revenues	91%	88%	88%
Relationship Revenue | Research and Insights | MA | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	$ 911	$ 868	$ 795
Percentage of Revenues	98%	98%	98%
Relationship Revenue | Data and Information | MA | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	$ 849	$ 786	$ 712
Percentage of Revenues	100%	100%	100%

Revenues - Revenue Recognition

Revenues - Revenue Recognition Timing (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Disaggregation of Revenue [Line Items]
Revenue recognized	$ 7,088	$ 5,916	$ 5,468
Operating Segments
Disaggregation of Revenue [Line Items]
Revenue recognized	7,088	5,916	5,468
Revenue recognized at a point in time
Disaggregation of Revenue [Line Items]
Revenue recognized	2,618	1,740	1,609
Revenue recognized over time
Disaggregation of Revenue [Line Items]
Revenue recognized	4,470	4,176	3,859
MA
Disaggregation of Revenue [Line Items]
Revenue recognized	3,295	3,056	2,769
MA | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue recognized	3,308	3,069	2,777
MA | Revenue recognized at a point in time | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue recognized	101	102	97
MA | Revenue recognized over time | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue recognized	3,194	2,954	2,672
MIS
Disaggregation of Revenue [Line Items]
Revenue recognized	3,793	2,860	2,699
MIS | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue recognized	3,986	3,046	2,873
MIS | Revenue recognized at a point in time | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue recognized	2,517	1,638	1,512
MIS | Revenue recognized over time | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue recognized	$ 1,276	$ 1,222	$ 1,187

Revenues - Unbilled Receivables

Revenues - Unbilled Receivables (Detail) - Accounts Receivable - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
MA
Disaggregation of Revenue [Line Items]
Unbilled Receivables	$ 122	$ 119
MIS
Disaggregation of Revenue [Line Items]
Unbilled Receivables	$ 426	$ 415

Revenues - Schedule of Changes

Revenues - Schedule of Changes in the Deferred Revenue Balances (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Change in Contract with Customer, Liability [Abstract]
Beginning Balance	$ 1,381	$ 1,333	$ 1,335
Revenue recognized that was included in the deferred revenue balance at the beginning of the period	(1,253)	(1,191)	(1,206)
Increases due to amounts billable excluding amounts recognized as revenue during the period	1,411	1,215	1,220
Increases due to acquisitions during the period	9		1
Effect of exchange rate changes	(37)	24	(17)
Total changes in deferred revenue	130	48	(2)
Ending Balance	1,511	1,381	1,333
Deferred revenue - current	1,454	1,316	1,258
Deferred revenue - non-current	57	65	75
MA
Change in Contract with Customer, Liability [Abstract]
Beginning Balance	1,111	1,055	1,039
Revenue recognized that was included in the deferred revenue balance at the beginning of the period	(1,044)	(980)	(996)
Increases due to amounts billable excluding amounts recognized as revenue during the period	1,200	1,015	1,018
Increases due to acquisitions during the period	9		1
Effect of exchange rate changes	(33)	21	(7)
Total changes in deferred revenue	132	56	16
Ending Balance	1,243	1,111	1,055
Deferred revenue - current	1,243	1,109	1,053
Deferred revenue - non-current	0	2	2
MIS
Change in Contract with Customer, Liability [Abstract]
Beginning Balance	270	278	296
Revenue recognized that was included in the deferred revenue balance at the beginning of the period	(209)	(211)	(210)
Increases due to amounts billable excluding amounts recognized as revenue during the period	211	200	202
Increases due to acquisitions during the period	0		0
Effect of exchange rate changes	(4)	3	(10)
Total changes in deferred revenue	(2)	(8)	(18)
Ending Balance	268	270	278
Deferred revenue - current	211	207	205
Deferred revenue - non-current	$ 57	$ 63	$ 73

Revenues - Expected Recognition

Revenues - Expected Recognition Period for Remaining Performance Obligations (Detail) $ in Millions	Dec. 31, 2024 USD ($)
MA
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 4,400
MA | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, percentage	55%
Revenue, remaining performance obligation, period	1 year
MA | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, percentage	25%
MA | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01 | Minimum
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, period	1 year
MA | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01 | Maximum
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, period	2 years
MIS
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 102
MIS | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, percentage	25%
Revenue, remaining performance obligation, period	1 year
MIS | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01 | Minimum
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, period	1 year
MIS | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01 | Maximum
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, period	5 years
MIS | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, percentage	50%

Revenues - Costs to Fulfill a C

Revenues - Costs to Fulfill a Contract with a Customer (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Capitalized Costs To Fulfill Sales Contracts | Selling, General and Administrative Expenses
Disaggregation of Revenue [Line Items]
Deferred cost balance	$ 51	$ 44
Capitalized Costs To Fulfill Sales Contracts | Operating Expense
Disaggregation of Revenue [Line Items]
Capitalized contract cost, amortization	120	114	$ 123
MA | Capitalized Costs To Obtain Sales Contracts
Disaggregation of Revenue [Line Items]
Deferred cost balance	294	268
MA | Capitalized Costs To Obtain Sales Contracts | Selling, General and Administrative Expenses
Disaggregation of Revenue [Line Items]
Capitalized contract cost, amortization	110	102	80
MA | Capitalized Costs To Fulfill Sales Contracts | Selling, General and Administrative Expenses
Disaggregation of Revenue [Line Items]
Deferred cost balance	39	35
MA | Royalty Cost | Operating Expense
Disaggregation of Revenue [Line Items]
Capitalized contract cost, amortization	77	70	69
MIS | Capitalized Costs To Fulfill Sales Contracts | Selling, General and Administrative Expenses
Disaggregation of Revenue [Line Items]
Deferred cost balance	12	9
MIS | Capitalization of Work-In-Process for In-Progress Ratings | Operating Expense
Disaggregation of Revenue [Line Items]
Capitalized contract cost, amortization	$ 43	$ 44	$ 54

Reconciliation of Weighted Av_3

Reconciliation of Weighted Average Shares Outstanding - Reconciliation of Basic to Diluted Shares Outstanding (Detail) - shares shares in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Earnings Per Share [Abstract]
Basic (in shares)	181.8	183.2	183.9
Dilutive effect of shares issuable under stock-based compensation plans (in shares)	0.9	0.8	0.8
Diluted (in shares)	182.7	184	184.7
Anti-dilutive options to purchase common shares and restricted stock as well as contingently issuable restricted stock which are excluded from the table above (in shares)	0.4	0.5	0.5

Cash Equivalents and Investme_3

Cash Equivalents and Investments (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	$ 2,408	$ 2,130
Short-term investments	566	63
Other assets	1,166	1,138
Certificates of deposit and money market deposit accounts/funds
Cash and Cash Equivalents [Line Items]
Cost	1,911	1,178
Gross Unrealized Gains	0	0
Fair Value	1,911	1,178
Cash and cash equivalents	1,345	1,112
Short-term investments	566	63
Other assets	0	3
Mutual funds
Cash and Cash Equivalents [Line Items]
Cost	88	91
Gross Unrealized Gains	10	6
Fair Value	98	97
Cash and cash equivalents	0	0
Short-term investments	0	0
Other assets	$ 98	$ 97

Cash Equivalents and Investme_4

Cash Equivalents and Investments - Footnote (Detail) - Certificates of deposit and money market deposit accounts/funds	Dec. 31, 2024	Dec. 31, 2023
Short-term Investments | Minimum
Cash and Cash Equivalents [Line Items]
Securities maturity period	1 month	1 month
Short-term Investments | Maximum
Cash and Cash Equivalents [Line Items]
Securities maturity period	12 months	12 months
Other assets
Cash and Cash Equivalents [Line Items]
Securities maturity period		14 months
Cash and cash equivalent | Maximum
Cash and Cash Equivalents [Line Items]
Securities maturity period	90 days

Cash Equivalents and Investme_5

Cash Equivalents and Investments - Narrative (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Cash and Cash Equivalents [Abstract]
Company owned life insurance (at contract value)	$ 48	$ 47

Derivative Instruments And He_3

Derivative Instruments And Hedging Activities - Schedule of Interest Rate Swap (Details) - Fair Value Hedging - Interest Rate Swap - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Derivative [Line Items]
Notional Amount	$ 2,550	$ 2,550
2014 Senior Notes due 2044
Derivative [Line Items]
Notional Amount	$ 300	$ 300
Floating  Interest Rate	SOFR	SOFR
2017 Senior Notes due 2028
Derivative [Line Items]
Notional Amount	$ 500	$ 500
Floating  Interest Rate	SOFR	SOFR
2018 Senior Notes due 2029
Derivative [Line Items]
Notional Amount	$ 400	$ 400
Floating  Interest Rate	SOFR	SOFR
2018 Senior Notes due 2048
Derivative [Line Items]
Notional Amount	$ 300	$ 300
Floating  Interest Rate	SOFR	SOFR
2020 Senior Notes due 2025
Derivative [Line Items]
Notional Amount	$ 300	$ 300
Floating  Interest Rate	SOFR	SOFR
2022 Senior Notes due 2052
Derivative [Line Items]
Notional Amount	$ 500	$ 500
Floating  Interest Rate	SOFR	SOFR
2022 Senior Notes due 2032
Derivative [Line Items]
Notional Amount	$ 250	$ 250
Floating  Interest Rate	SOFR	SOFR

Derivative Instruments And He_4

Derivative Instruments And Hedging Activities - Summary of Net Gain (Loss) on Interest Rate Swaps Designated in Fair Value Hedge (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Derivative Instruments, Gain (Loss) [Line Items]
Interest expense, net	$ (237)	$ (251)	$ (231)
Derivative, gain (loss), statement of income or comprehensive income	Interest expense, net	Interest expense, net	Interest expense, net
Designated as Hedging Instrument | Interest Rate Swap
Derivative Instruments, Gain (Loss) [Line Items]
Fair value changes on interest rate swaps	$ 14	$ 56	$ (228)
Fair value changes on hedged debt	(14)	(56)	228
Designated as Hedging Instrument | Interest Rate Swap | Fair Value hedge Net Interest Settlements and Accruals
Derivative Instruments, Gain (Loss) [Line Items]
Net interest settlements and accruals on interest rate swaps	$ (96)	$ (89)	$ (8)

Derivative Instruments And He_5

Derivative Instruments And Hedging Activities - Additional Information (Detail) $ in Millions	Dec. 31, 2024 USD ($)	Dec. 31, 2024 EUR (€)	Dec. 31, 2023 USD ($)
Not Designated as Accounting Hedges | Total Return Swap
Derivative [Line Items]
Notional Amount | $	$ 66		$ 58
Net Investment Hedging | Designated as Hedging Instrument | Currency Swap
Derivative [Line Items]
Notional Amount	$ 3,264	€ 3,103,000,000
2015 Senior Notes, due 2027 | Net Investment Hedging | Designated as Hedging Instrument | Currency Swap
Derivative [Line Items]
Notional Amount		500,000,000
0.950% 2019 Senior Note, due 2030 | Net Investment Hedging | Designated as Hedging Instrument | Currency Swap
Derivative [Line Items]
Notional Amount		€ 750,000,000

Derivative Instruments And He_6

Derivative Instruments And Hedging Activities - Summary of Notional Amounts of Outstanding Cross Currency Swap (Detail) - Currency Swap - Net Investment Hedging € in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2024 EUR (€)	Dec. 31, 2023 EUR (€)
Currency Paid
Derivative [Line Items]
Notional Amount | €			€ 3,103	€ 2,903
Currency Paid | Fixed Pay Weighted Average Interest Rate
Derivative [Line Items]
Notional Amount | €			€ 965	€ 765
Weighted Average Interest Rate	2.91%	3.67%	2.91%	3.67%
Currency Paid | Euro Short-Term Rate
Derivative [Line Items]
Notional Amount | €			€ 2,138	€ 2,138
Floating  Interest Rate	Based on ESTR	Based on ESTR
Currency Received
Derivative [Line Items]
Notional Amount | $	$ 3,264	$ 3,050
Currency Received | Fixed Received Weighted Average Interest Rate
Derivative [Line Items]
Notional Amount | $	$ 1,014	$ 800
Weighted Average Interest Rate	4.41%	5.25%	4.41%	5.25%
Currency Received | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Derivative [Line Items]
Notional Amount | $	$ 2,250	$ 2,250
Floating  Interest Rate	Based on SOFR	Based on SOFR

Derivative Instruments And He_7

Derivative Instruments And Hedging Activities - Schedule of Notional Amount of Net Investment Hedges (Detail) - Dec. 31, 2024 - Designated as Hedging Instrument - Currency Swap € in Millions, $ in Millions	USD ($)	EUR (€)
2026
Derivative [Line Items]
Notional Amount	$ 500	€ 450
2027
Derivative [Line Items]
Notional Amount	550	531
2028
Derivative [Line Items]
Notional Amount	600	588
2029
Derivative [Line Items]
Notional Amount	614	573
2031
Derivative [Line Items]
Notional Amount	500	481
2032
Derivative [Line Items]
Notional Amount	500	480
Net Investment Hedging
Derivative [Line Items]
Notional Amount	$ 3,264	€ 3,103

Derivative Instruments And He_8

Derivative Instruments And Hedging Activities - Gains (Losses) Recognized in AOCI and Reclassified from AOCI on Derivatives (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Derivative Instruments, Gain (Loss) [Line Items]
Total, amount of gain/loss) recognized in AOCI on derivative, net of tax	$ 222	$ (132)	$ 164
Cash flow hedging relationships, amount of gain/(loss) reclassified from AOCI into income, net of tax	(2)	(1)	(2)
Total, amount of gain/loss) reclassified from AOCI into income, net of tax	(2)	(1)	(2)
Gain (Loss) Recognized in Income on Derivative (Amount Excluded from Effectiveness Testing)	47	54	56
Net Investment Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Net investment hedging relationships, amount of gain/(loss) recognized in AOCI on derivative, net of tax	222	(132)	164
Net investment hedging relationships, amount of gain/(loss) reclassified from AOCI into income, net of tax	0	0	0
Gain (Loss) Recognized in Income on Derivative (Amount Excluded from Effectiveness Testing)	47	54	56
Cash Flow Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Cash flow hedging relationships, amount of gain/(loss) recognized in AOCI on derivative, net of tax	0	0	0
Cash flow hedging relationships, amount of gain/(loss) reclassified from AOCI into income, net of tax	(2)	(1)	(2)
Gain (Loss) Recognized in Income on Derivative (Amount Excluded from Effectiveness Testing)	0	0	0
Currency Swap | Net Investment Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Net investment hedging relationships, amount of gain/(loss) recognized in AOCI on derivative, net of tax	157	(97)	99
Net investment hedging relationships, amount of gain/(loss) reclassified from AOCI into income, net of tax	0	0	0
Gain (Loss) Recognized in Income on Derivative (Amount Excluded from Effectiveness Testing)	47	54	56
Currency Swap | Cash Flow Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Cash flow hedging relationships, amount of gain/(loss) recognized in AOCI on derivative, net of tax	0	0	0
Cash flow hedging relationships, amount of gain/(loss) reclassified from AOCI into income, net of tax	0	1	0
Gain (Loss) Recognized in Income on Derivative (Amount Excluded from Effectiveness Testing)	0	0	0
Long-term debt | Net Investment Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Net investment hedging relationships, amount of gain/(loss) recognized in AOCI on derivative, net of tax	65	(35)	65
Net investment hedging relationships, amount of gain/(loss) reclassified from AOCI into income, net of tax	0	0	0
Gain (Loss) Recognized in Income on Derivative (Amount Excluded from Effectiveness Testing)	0	0	0
Interest Rate Contract [Member] | Cash Flow Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Cash flow hedging relationships, amount of gain/(loss) recognized in AOCI on derivative, net of tax	0	0	0
Cash flow hedging relationships, amount of gain/(loss) reclassified from AOCI into income, net of tax	(2)	(2)	(2)
Gain (Loss) Recognized in Income on Derivative (Amount Excluded from Effectiveness Testing)	$ 0	$ 0	$ 0

Derivative Instruments And He_9

Derivative Instruments And Hedging Activities - Cumulative Amount of Unrecognized Hedge Losses Recorded in AOCI (Detail) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Derivative [Line Items]
Cumulative Gains (Losses), net of tax	$ (638)	$ (567)
Designated as Hedging Instrument
Derivative [Line Items]
Cumulative Gains (Losses), net of tax	233	9
Net Investment Hedging | Designated as Hedging Instrument
Derivative [Line Items]
Cumulative Gains (Losses), net of tax	275	53
Net Investment Hedging | Currency Swap | Designated as Hedging Instrument
Derivative [Line Items]
Cumulative Gains (Losses), net of tax	178	21
Net Investment Hedging | Foreign Exchange Forward | Designated as Hedging Instrument
Derivative [Line Items]
Cumulative Gains (Losses), net of tax	29	29
Net Investment Hedging | Long-term debt | Designated as Hedging Instrument
Derivative [Line Items]
Cumulative Gains (Losses), net of tax	68	3
Cash Flow Hedging | Designated as Hedging Instrument
Derivative [Line Items]
Cumulative Gains (Losses), net of tax	(42)	(44)
Cash Flow Hedging | Currency Swap | Designated as Hedging Instrument
Derivative [Line Items]
Cumulative Gains (Losses), net of tax	1	1
Cash Flow Hedging | Interest Rate Contract [Member] | Designated as Hedging Instrument
Derivative [Line Items]
Cumulative Gains (Losses), net of tax	$ (43)	$ (45)

Derivative Instruments And H_10

Derivative Instruments And Hedging Activities - Summary of Notional Amounts of Outstanding Foreign Exchange Forwards (Detail) - Not Designated as Accounting Hedges € in Millions, ₨ in Millions, ¥ in Millions, £ in Millions, $ in Millions, $ in Millions, $ in Millions, $ in Millions	Dec. 31, 2024 USD ($)	Dec. 31, 2024 EUR (€)	Dec. 31, 2024 GBP (£)	Dec. 31, 2024 JPY (¥)	Dec. 31, 2024 CAD ($)	Dec. 31, 2024 SGD ($)	Dec. 31, 2024 INR (₨)	Dec. 31, 2024 AUD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2023 EUR (€)	Dec. 31, 2023 GBP (£)	Dec. 31, 2023 JPY (¥)	Dec. 31, 2023 CAD ($)	Dec. 31, 2023 SGD ($)	Dec. 31, 2023 INR (₨)	Dec. 31, 2023 AUD ($)
Contracts to sell USD for GBP
Derivative [Line Items]
Notional Amount	$ 604		£ 470						$ 513		£ 407
Contracts to sell USD for JPY
Derivative [Line Items]
Notional Amount	29			¥ 4,000					14			¥ 2,000
Contracts to sell USD for CAD
Derivative [Line Items]
Notional Amount	35				$ 50				147				$ 200
Contracts to sell USD for SGD
Derivative [Line Items]
Notional Amount	45					$ 59			50					$ 67
Contracts to sell USD for EUR
Derivative [Line Items]
Notional Amount	0	€ 0							60	€ 55
Contracts to sell USD for INR
Derivative [Line Items]
Notional Amount	23						₨ 1,900		23						₨ 1,900
Contracts to sell EUR for USD
Derivative [Line Items]
Notional Amount	12	€ 12							0	€ 0
Contracts to sell USD for AUD
Derivative [Line Items]
Notional Amount	0							$ 0	5							$ 8
Contracts to sell CAD for USD
Derivative [Line Items]
Notional Amount	$ 0				$ 0				$ 19				$ 25

Derivative Instruments And H_11

Derivative Instruments And Hedging Activities - Summary of Net Gain (Loss) on Foreign Exchange Forwards Not Designated as Hedging Instruments (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Foreign Exchange Forward | Other Nonoperating Income (Expense)
Derivative Instruments, Gain (Loss) [Line Items]
Foreign exchange forwards amount of gain (loss) recognized in income	$ (24)	$ 15	$ (72)
Foreign Exchange Forward | Other Nonoperating Income (Expense) | RMS
Derivative Instruments, Gain (Loss) [Line Items]
Foreign exchange forwards amount of gain (loss) recognized in income	5	2	0
Total Return Swap | Operating Expense
Derivative Instruments, Gain (Loss) [Line Items]
Foreign exchange forwards amount of gain (loss) recognized in income	5	2	0
Total Return Swap | Selling, General and Administrative Expenses
Derivative Instruments, Gain (Loss) [Line Items]
Foreign exchange forwards amount of gain (loss) recognized in income	$ 1	$ 1	$ 0

Derivative Instruments And H_12

Derivative Instruments And Hedging Activities - Fair Value of Derivative Instruments (Detail) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Derivatives, Fair Value [Line Items]
Assets	$ 58	$ 16
Liabilities	$ 1,510	$ 1,747
Derivative asset, statement of financial position	Other current assets, Other assets	Other current assets, Other assets
Derivative liability, statement of financial position	Accounts payable and accrued liabilities, Other liabilities	Accounts payable and accrued liabilities, Other liabilities
Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Assets	$ 58	$ 3
Liabilities	195	366
Designated as Hedging Instrument | Long-term debt | Net Investment Hedging
Derivatives, Fair Value [Line Items]
Liabilities	1,294	1,381
Designated as Hedging Instrument | Currency Swap | Other assets | Net Investment Hedging
Derivatives, Fair Value [Line Items]
Assets	58	3
Designated as Hedging Instrument | Currency Swap | Accounts payable and accrued liabilities | Net Investment Hedging
Derivatives, Fair Value [Line Items]
Liabilities	3	0
Designated as Hedging Instrument | Currency Swap | Other liabilities | Net Investment Hedging
Derivatives, Fair Value [Line Items]
Liabilities	26	183
Designated as Hedging Instrument | Interest Rate Swap | Other liabilities | Fair Value Hedging
Derivatives, Fair Value [Line Items]
Liabilities	166	183
Not Designated as Accounting Hedges | Foreign Exchange Forward | Other current assets
Derivatives, Fair Value [Line Items]
Assets	0	13
Not Designated as Accounting Hedges | Foreign Exchange Forward | Accounts payable and accrued liabilities
Derivatives, Fair Value [Line Items]
Liabilities	$ 21	$ 0

Property and Equipment, Net (De

Property and Equipment, Net (Detail) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Property, Plant and Equipment [Line Items]
Total property and equipment, at cost	$ 2,109	$ 1,875
Less: accumulated depreciation and amortization	(1,453)	(1,272)
Total property and equipment, net	656	603
Office and Computer Equipment
Property, Plant and Equipment [Line Items]
Total property and equipment, at cost	$ 400	354
Office and Computer Equipment | Minimum
Property, Plant and Equipment [Line Items]
Property plant and equipment useful life	3 years
Office and Computer Equipment | Maximum
Property, Plant and Equipment [Line Items]
Property plant and equipment useful life	10 years
Office Furniture and Fixtures
Property, Plant and Equipment [Line Items]
Total property and equipment, at cost	$ 57	57
Office Furniture and Fixtures | Minimum
Property, Plant and Equipment [Line Items]
Property plant and equipment useful life	3 years
Office Furniture and Fixtures | Maximum
Property, Plant and Equipment [Line Items]
Property plant and equipment useful life	10 years
Internal-use Computer Software
Property, Plant and Equipment [Line Items]
Total property and equipment, at cost	$ 1,417	1,232
Internal-use Computer Software | Minimum
Property, Plant and Equipment [Line Items]
Property plant and equipment useful life	1 year
Internal-use Computer Software | Maximum
Property, Plant and Equipment [Line Items]
Property plant and equipment useful life	10 years
Leasehold Improvements and Building
Property, Plant and Equipment [Line Items]
Total property and equipment, at cost	$ 235	$ 232
Leasehold Improvements and Building | Minimum
Property, Plant and Equipment [Line Items]
Property plant and equipment useful life	1 year
Leasehold Improvements and Building | Maximum
Property, Plant and Equipment [Line Items]
Property plant and equipment useful life	20 years

Property and Equipment, Net - A

Property and Equipment, Net - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Property, Plant and Equipment [Line Items]
Depreciation and amortization expense related to property and equipment	$ 233	$ 175	$ 131
Charges related to asset abandonment	43	0	0
Accelerated Amortization Charges
Property, Plant and Equipment [Line Items]
Charges related to asset abandonment	31
Internal-use Computer Software
Property, Plant and Equipment [Line Items]
Depreciation and amortization expense related to property and equipment	180	$ 121	$ 79
Internal-use Computer Software | Accelerated Amortization Charges
Property, Plant and Equipment [Line Items]
Charges related to asset abandonment	$ 26
Internal-use Computer Software | Weighted Average
Property, Plant and Equipment [Line Items]
Property plant and equipment useful life	4 years 4 months 24 days

Goodwill And Other Acquired I_3

Goodwill And Other Acquired Intangible Assets - Activity in Goodwill (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Goodwill [Roll Forward]
Beginning balance, goodwill gross	$ 5,968	$ 5,851
Beginning balance, accumulated impairment charge	(12)	(12)
Beginning balance, goodwill net	5,956	5,839
Additions/adjustments	209	3
Foreign currency translation adjustments	(171)	114
Ending balance, goodwill gross	6,006	5,968
Ending balance, accumulated impairment charge	(12)	(12)
Ending balance, goodwill net	5,994	5,956
MA
Goodwill [Roll Forward]
Beginning balance, goodwill gross	5,681	5,474
Beginning balance, accumulated impairment charge	(12)	(12)
Beginning balance, goodwill net	5,669	5,462
Additions/adjustments	112	90
Foreign currency translation adjustments	(167)	117
Ending balance, goodwill gross	5,626	5,681
Ending balance, accumulated impairment charge	(12)	(12)
Ending balance, goodwill net	5,614	5,669
MIS
Goodwill [Roll Forward]
Beginning balance, goodwill gross	287	377
Beginning balance, accumulated impairment charge	0	0
Beginning balance, goodwill net	287	377
Additions/adjustments	97	(87)
Foreign currency translation adjustments	(4)	(3)
Ending balance, goodwill gross	380	287
Ending balance, accumulated impairment charge	0	0
Ending balance, goodwill net	$ 380	$ 287

Goodwill And Other Acquired I_4

Goodwill And Other Acquired Intangible Assets - Acquired Intangible Assets and Related Amortization (Detail) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets, net	$ 1,890	$ 2,049
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets, gross	2,035	2,065
Accumulated amortization	(631)	(556)
Acquired intangible assets, net	1,404	1,509
Software/product technology
Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets, gross	695	674
Accumulated amortization	(419)	(364)
Acquired intangible assets, net	276	310
Database
Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets, gross	166	179
Accumulated amortization	(89)	(82)
Acquired intangible assets, net	77	97
Trade names
Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets, gross	199	199
Accumulated amortization	(83)	(72)
Acquired intangible assets, net	116	127
Other
Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets, gross	67	52
Accumulated amortization	(50)	(46)
Acquired intangible assets, net	$ 17	$ 6

Goodwill And Other Acquired I_5

Goodwill And Other Acquired Intangible Assets - Amortization Expense Relating to Acquired Intangible Assets (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Finite-Lived Intangible Assets [Line Items]
Amortization expense	$ 198	$ 198	$ 200
Charges related to asset abandonment	43	$ 0	$ 0
Accelerated Amortization Charges
Finite-Lived Intangible Assets [Line Items]
Charges related to asset abandonment	31
Accelerated Amortization Charges | Amortization of Intangible Assets
Finite-Lived Intangible Assets [Line Items]
Charges related to asset abandonment	$ 5

Goodwill And Other Acquired I_6

Goodwill And Other Acquired Intangible Assets - Estimated Future Amortization Expense for Acquired Intangible Assets Subject to Amortization (Detail) $ in Millions	Dec. 31, 2024 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
2025	$ 202
2026	196
2027	178
2028	166
2029	133
Thereafter	1,015
Total estimated future amortization	$ 1,890

Restructuring - Additional Info

Restructuring - Additional Information (Detail) - USD ($) $ in Millions		12 Months Ended			36 Months Ended
	Dec. 19, 2024	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2027	Dec. 31, 2021
Restructuring Cost and Reserve [Line Items]
Remaining restructuring liability		$ 47	$ 36	$ 64		$ 0
Strategic and Operational Efficiency Restructuring Program
Restructuring Cost and Reserve [Line Items]
Payments for restructuring		5	0	0
Strategic and Operational Efficiency Restructuring Program | Minimum | Forecast
Restructuring Cost and Reserve [Line Items]
Payments for restructuring					$ 170
Strategic and Operational Efficiency Restructuring Program | Maximum | Forecast
Restructuring Cost and Reserve [Line Items]
Payments for restructuring					$ 200
Strategic and Operational Efficiency Restructuring Program | Employee Severance | Minimum
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost		170
Strategic and Operational Efficiency Restructuring Program | Employee Severance | Maximum
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost		200
Strategic and Operational Efficiency Restructuring Program | Real Estate | Minimum
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost		10
Strategic and Operational Efficiency Restructuring Program | Real Estate | Maximum
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost		20
Strategic and Operational Efficiency Restructuring Program | Accelerated Amortization Charges | Minimum
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost		20
Strategic and Operational Efficiency Restructuring Program | Accelerated Amortization Charges | Maximum
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost		30
2022 - 2023 Geolocation Restructuring Program
Restructuring Cost and Reserve [Line Items]
Payments for restructuring		$ 42	$ 79	$ 22
Estimated Annual Savings | Strategic and Operational Efficiency Restructuring Program | Minimum
Restructuring Cost and Reserve [Line Items]
Effect on future earnings, amount	$ 250
Estimated Annual Savings | Strategic and Operational Efficiency Restructuring Program | Maximum
Restructuring Cost and Reserve [Line Items]
Effect on future earnings, amount	$ 300

Restructuring - Restructuring E

Restructuring - Restructuring Expenses Included in Consolidated Statements of Operations (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Restructuring Cost and Reserve [Line Items]
Restructuring	$ 59	$ 87	$ 114
Operating lease right-of-use assets	216	277
Real Estate
Restructuring Cost and Reserve [Line Items]
Operating lease right-of-use assets		4	0
2022 - 2023 Geolocation Restructuring Program
Restructuring Cost and Reserve [Line Items]
Restructuring	14	87	113
Cumulative expense incurred	214
2022 - 2023 Geolocation Restructuring Program | Employee Severance
Restructuring Cost and Reserve [Line Items]
Restructuring	14	51	85
Cumulative expense incurred	150
2022 - 2023 Geolocation Restructuring Program | Real Estate
Restructuring Cost and Reserve [Line Items]
Restructuring	0	36	27
Cumulative expense incurred	63
2022 - 2023 Geolocation Restructuring Program | Other Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring	0	0	1
Cumulative expense incurred	1
Strategic and Operational Efficiency Restructuring Program
Restructuring Cost and Reserve [Line Items]
Restructuring	45	0	0
Cumulative expense incurred	45
Strategic and Operational Efficiency Restructuring Program | Employee Severance
Restructuring Cost and Reserve [Line Items]
Restructuring	41	0	0
Cumulative expense incurred	41
Strategic and Operational Efficiency Restructuring Program | Other Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring	4	$ 0	$ 0
Cumulative expense incurred	$ 4

Restructuring - Restructuring_2

Restructuring - Restructuring Expenses Included in Consolidated Statements of Operations (Footnote) (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Restructuring Cost and Reserve [Line Items]
Operating lease right-of-use assets	$ 216	$ 277
Real Estate
Restructuring Cost and Reserve [Line Items]
Operating lease right-of-use assets		$ 4	$ 0

Restructuring - Changes in Rest

Restructuring - Changes in Restructuring Liability (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Restructuring Reserve [Roll Forward]
Restructuring liability, beginning balance	$ 36	$ 64	$ 0
Restructuring liability, ending balance	$ 47	36	64
Restructuring, incurred cost, statement of income or comprehensive income	Restructuring Charges
2022 - 2023 Geolocation Restructuring Program
Restructuring Reserve [Roll Forward]
Cost incurred and adjustments	$ 14	51	86
Cash payments	(42)	(79)	(22)
Strategic and Operational Efficiency Restructuring Program
Restructuring Reserve [Roll Forward]
Cost incurred and adjustments	44	0	0
Cash payments	$ (5)	$ 0	$ 0

Fair Value - Financial Instrume

Fair Value - Financial Instruments Carried at Fair Value on Recurring Basis (Detail) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Assets:
Derivatives	$ 58	$ 16
Total	166	123
Liabilities:
Derivatives	216	366
Total	216	366
Money market funds/mutual funds
Assets:
Money market funds/mutual funds	108	107
Level 1
Assets:
Derivatives	0	0
Total	108	107
Liabilities:
Derivatives	0	0
Total	0	0
Level 1 | Money market funds/mutual funds
Assets:
Money market funds/mutual funds	108	107
Level 2
Assets:
Derivatives	58	16
Total	58	16
Liabilities:
Derivatives	216	366
Total	216	366
Level 2 | Money market funds/mutual funds
Assets:
Money market funds/mutual funds	$ 0	$ 0

Other Balance Sheet Informati_3

Other Balance Sheet Information - Additional Details Related to Certain Balance Sheet Captions (Detail) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Other current assets:
Prepaid taxes	$ 81	$ 115
Prepaid expenses	179	133
Capitalized costs to obtain and fulfill sales contracts	131	116
Foreign exchange forwards on certain assets and liabilities	0	13
Interest receivable on interest rate and cross currency swaps	77	79
Other	47	33
Total other current assets	515	489
Other assets:
Investments in non-consolidated affiliates	465	521
Deposits for real-estate leases	15	16
Indemnification assets related to acquisitions	109	111
Mutual funds, certificates of deposit and money market deposit accounts/funds	98	100
Company owned life insurance (at contract value)	48	47
Capitalized costs to obtain sales contracts	214	196
Derivative instruments designated as accounting hedges	58	3
Pension and other retirement employee benefits	60	41
Other	99	103
Total other assets	1,166	1,138
Accounts payable and accrued liabilities:
Salaries and benefits	133	130
Incentive compensation	452	345
Customer credits, advanced payments and advanced billings	142	105
Dividends	32	7
Professional service fees	38	46
Accounts payable	53	23
Income taxes	144	108
Pension and other retirement employee benefits	11	15
Accrued royalties	25	24
FX forwards on certain assets and liabilities	21	0
Restructuring liability	46	35
Derivative instruments designated as accounting hedges	3	0
Other	92	88
Total accounts payable and accrued liabilities	1,344	1,076
Other liabilities:
Pension and other retirement employee benefits	195	190
Interest accrued on UTPs	47	36	$ 47
MAKS indemnification provisions	19	19
Income tax liability – non-current portion	12	15
Derivative instruments designated as accounting hedges	192	366
Other	52	50
Total other liabilities	517	676
Debt
Accounts payable and accrued liabilities:
Interest accrued	92	83
Swap
Accounts payable and accrued liabilities:
Interest accrued	$ 60	$ 67

Other Balance Sheet Informati_4

Other Balance Sheet Information - Investments in Non-Consolidated Affiliates (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Equity Method Investments and Joint Ventures [Abstract]
Equity method investments	$ 127	$ 186
Investments measured using the measurement alternative	328	327
Other	10	8
Total investments in non-consolidated affiliates	$ 465	$ 521

Comprehensive Income And Accu_3

Comprehensive Income And Accumulated Other Comprehensive Income - Changes in Components of Accumulated Other Comprehensive Income (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	$ 3,476	$ 2,689	$ 2,916
Ending Balance	3,727	3,476	2,689
Total
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	(567)	(643)	(410)
Other comprehensive income (loss) before reclassifications	(71)	78	(257)
Amounts reclassified from AOCL	0	(2)	24
Other comprehensive income (loss)	(71)	76	(233)
Ending Balance	(638)	(567)	(643)
Foreign  Currency Translation Adjustments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	(520)	(736)	(335)
Other comprehensive income (loss) before reclassifications	(312)	216	(421)
Amounts reclassified from AOCL	0	0	20
Other comprehensive income (loss)	(312)	216	(401)
Ending Balance	(832)	(520)	(736)
Gains (Losses) on Cash Flow Hedges
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	(44)	(45)	(47)
Other comprehensive income (loss) before reclassifications	0	0	0
Amounts reclassified from AOCL	2	1	2
Other comprehensive income (loss)	2	1	2
Ending Balance	(42)	(44)	(45)
Net Investment Hedges
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	53	185	21
Other comprehensive income (loss) before reclassifications	222	(132)	164
Amounts reclassified from AOCL	0	0	0
Other comprehensive income (loss)	222	(132)	164
Ending Balance	275	53	185
Pension and  Other Retirement Benefits
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	(56)	(47)	(49)
Other comprehensive income (loss) before reclassifications	19	(6)	0
Amounts reclassified from AOCL	(2)	(3)	2
Other comprehensive income (loss)	17	(9)	2
Ending Balance	$ (39)	$ (56)	$ (47)

Pension And Other Retirement _3

Pension And Other Retirement Benefits - Summary of Changes in Benefit Obligations and Fair Value of Plan Assets for Post-Retirement Plans (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Change in benefit obligation:
Interest cost	$ (26)	$ (26)	$ (17)
Amounts recorded on the consolidated balance sheets:
Pension and retirement benefits asset – non current	60	41
Pension and retirement benefits liability – current	(11)	(15)
Pension and retirement benefits liability – non current	(195)	(190)
U.S. | Pension Plans
Change in benefit obligation:
Benefit obligation, beginning of the period	(484)	(462)
Service cost	(10)	(11)	(14)
Interest cost	(22)	(22)	(15)
Plan participants’ contributions	0	0
Benefits paid	24	30
Actuarial (loss) gain	0	(4)
Assumption changes	28	(15)
Benefit obligation, end of the period	(464)	(484)	(462)
Change in plan assets:
Fair value of plan assets, beginning of the period	449	420
Actual return on plan assets	24	48
Benefits paid	(24)	(30)
Employer contributions	11	11
Plan participants’ contributions	0	0
Fair value of plan assets, end of the period	460	449	420
Funded status of the plans	(4)	(35)
Amounts recorded on the consolidated balance sheets:
Pension and retirement benefits asset – non current	60	40
Pension and retirement benefits liability – current	(8)	(13)
Pension and retirement benefits liability – non current	(56)	(62)
Net amount recognized	(4)	(35)
Accumulated benefit obligation, end of the period	(436)	(453)
U.S. | Other Retirement Plans
Change in benefit obligation:
Benefit obligation, beginning of the period	(42)	(39)
Service cost	(3)	(3)	(4)
Interest cost	(2)	(2)	(1)
Plan participants’ contributions	(2)	(1)
Benefits paid	3	2
Actuarial (loss) gain	0	2
Assumption changes	4	(1)
Benefit obligation, end of the period	(42)	(42)	(39)
Change in plan assets:
Fair value of plan assets, beginning of the period	0	0
Actual return on plan assets	0	0
Benefits paid	(3)	(2)
Employer contributions	1	1
Plan participants’ contributions	2	1
Fair value of plan assets, end of the period	0	0	$ 0
Funded status of the plans	(42)	(42)
Amounts recorded on the consolidated balance sheets:
Pension and retirement benefits asset – non current	0	0
Pension and retirement benefits liability – current	(2)	(2)
Pension and retirement benefits liability – non current	(40)	(40)
Net amount recognized	$ (42)	$ (42)

Pension And Other Retirement _4

Pension And Other Retirement Benefits - Accumulated Benefit Obligation in Excess of Plan Assets (Detail) - Pension Plans - U.S. Plans - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Defined Benefit Plan Disclosure [Line Items]
Aggregate projected benefit obligation	$ 65	$ 75
Aggregate accumulated benefit obligation	$ 57	$ 67

Pension And Other Retirement _5

Pension And Other Retirement Benefits - Summary of Pre-Tax Net Actuarial Losses and Prior Service Cost Recognized in Accumulated Other Comprehensive Income (Loss) (Detail) - U.S. Plans - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Pension Plans
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Net actuarial gains (losses)	$ (61)	$ (82)
Net prior service credits	1	1
Total recognized in AOCL – pre-tax	(60)	(81)
Other Retirement Plans
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Net actuarial gains (losses)	13	10
Net prior service credits	0	0
Total recognized in AOCL – pre-tax	$ 13	$ 10

Pension And Other Retirement _6

Pension And Other Retirement Benefits - Components of Net Periodic Benefit Expense Related to Retirement Plans (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Defined Benefit Plan Disclosure [Line Items]
Interest cost	$ 26	$ 26	$ 17
U.S. Plans | Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	10	11	14
Interest cost	22	22	15
Expected return on plan assets	(30)	(32)	(26)
Amortization of net actuarial (gains) losses and prior service credits from earlier periods	0	(1)	3
Loss on settlement of pension obligation	(1)	(2)	0
Net periodic expense (income)	1	(2)	6
U.S. Plans | Other Retirement Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	3	3	4
Interest cost	2	2	1
Expected return on plan assets	0	0	0
Amortization of net actuarial (gains) losses and prior service credits from earlier periods	(1)	(1)	0
Loss on settlement of pension obligation	0	0	0
Net periodic expense (income)	$ 4	$ 4	$ 5

Pension And Other Retirement _7

Pension And Other Retirement Benefits - Summary Of Pre Tax Amounts Recognized In Other Comprehensive Income (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Defined Benefit Plan Disclosure [Line Items]
Net actuarial gain (loss) arising during the period	$ 25	$ (8)	$ (1)
U.S. Plans | Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Amortization of net actuarial (gains) losses and prior service credit	(1)	(1)	3
(Gain) loss on settlement of pension obligations	(1)	(2)	0
Net actuarial gain (loss) arising during the period	22	(3)	(19)
Total recognized in OCI – pre-tax	20	(6)	(16)
U.S. Plans | Other Retirement Plans
Defined Benefit Plan Disclosure [Line Items]
Amortization of net actuarial (gains) losses and prior service credit	(1)	(1)	0
(Gain) loss on settlement of pension obligations	0	0	0
Net actuarial gain (loss) arising during the period	4	1	13
Total recognized in OCI – pre-tax	$ 3	$ 0	$ 13

Pension And Other Retirement _8

Pension And Other Retirement Benefits - Weighted-Average Assumptions Used to Determine Benefit Obligations (Detail) - U.S. Plans	Dec. 31, 2024	Dec. 31, 2023
Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Discount rate	5.43%	4.73%
Rate of compensation increase	3.60%	3.60%
Cash balance plan interest crediting rate	4.78%	4.50%
Other Retirement Plans
Defined Benefit Plan Disclosure [Line Items]
Discount rate	5.40%	4.75%
Rate of compensation increase	0%	0%
Cash balance plan interest crediting rate	0%	0%

Pension And Other Retirement _9

Pension And Other Retirement Benefits - Weighted-Average Assumptions Used to Determine Net Periodic Benefit Expense (Detail) - U.S. Plans	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Discount rate	4.73%	4.93%	2.60%
Expected return on plan assets	6.10%	6.55%	5.05%
Rate of compensation increase	3.60%	3.63%	3.63%
Cash balance plan interest crediting rate	4.50%	4.50%	4.50%
Other Retirement Plans
Defined Benefit Plan Disclosure [Line Items]
Discount rate	4.75%	4.90%	2.65%
Expected return on plan assets	0%	0%	0%
Rate of compensation increase	0%	0%	0%
Cash balance plan interest crediting rate	0%	0%	0%

Pension and Other Retirement_10

Pension and Other Retirement Benefits - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Defined Benefit Plans and Other Postretirement Benefit Plans [Abstract]
Moody's shares held in ESOP		304,076	315,400
U.S. Plans
Defined Benefit Plans and Other Postretirement Benefit Plans [Abstract]
Employee contribution percentage of employee contribution in participation		50%
Maximum employee contribution in profit participation plan		3%
Defined contribution compensation expense		$ 73	$ 71	$ 35
U.S. Plans | Pension Plans
Defined Benefit Plans and Other Postretirement Benefit Plans [Abstract]
Expected rate of return		6.10%	6.55%	5.05%
Employer contributions		$ 11	$ 11
U.S. Plans | Other Retirement Plans
Defined Benefit Plans and Other Postretirement Benefit Plans [Abstract]
Expected rate of return		0%	0%	0%
Employer contributions		$ 1	$ 1
U.S. Plans | Equity Securities | Pension Plans
Defined Benefit Plans and Other Postretirement Benefit Plans [Abstract]
Plan asset, target asset allocation percentage		35%
U.S. Plans | Equity Securities | Pension Plans | Minimum
Defined Benefit Plans and Other Postretirement Benefit Plans [Abstract]
Plan asset, target asset allocation percentage		23%
U.S. Plans | Equity Securities | Pension Plans | Maximum
Defined Benefit Plans and Other Postretirement Benefit Plans [Abstract]
Plan asset, target asset allocation percentage		46%
U.S. Plans | Fixed Income Securities | Pension Plans
Defined Benefit Plans and Other Postretirement Benefit Plans [Abstract]
Plan asset, target asset allocation percentage		61%
U.S. Plans | Fixed Income Securities | Pension Plans | Minimum
Defined Benefit Plans and Other Postretirement Benefit Plans [Abstract]
Plan asset, target asset allocation percentage		44%
U.S. Plans | Fixed Income Securities | Pension Plans | Maximum
Defined Benefit Plans and Other Postretirement Benefit Plans [Abstract]
Plan asset, target asset allocation percentage		77%
U.S. Plans | Other Investments | Pension Plans
Defined Benefit Plans and Other Postretirement Benefit Plans [Abstract]
Plan asset, target asset allocation percentage		5%
U.S. Plans | Other Investments | Pension Plans | Minimum
Defined Benefit Plans and Other Postretirement Benefit Plans [Abstract]
Plan asset, target asset allocation percentage		2%
U.S. Plans | Other Investments | Pension Plans | Maximum
Defined Benefit Plans and Other Postretirement Benefit Plans [Abstract]
Plan asset, target asset allocation percentage		8%
Non-U.S. Plans
Defined Benefit Plans and Other Postretirement Benefit Plans [Abstract]
Defined contribution compensation expense		$ 50	$ 42	$ 37
Forecast | U.S. Plans | Pension Plans
Defined Benefit Plans and Other Postretirement Benefit Plans [Abstract]
Expected rate of return	6.60%

Pension And Other Retirement_11

Pension And Other Retirement Benefits - Summary of Pension Plan Assets by Category Based on Hierarchy of Fair Value Measurements (Detail) - Pension Plans - U.S. Plans - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Defined Benefit Plan Disclosure [Line Items]
Total assets	$ 460	$ 449	$ 420
Percent of total assets	100%	100%
Level 1
Defined Benefit Plan Disclosure [Line Items]
Total assets	$ 26	$ 25
Level 2
Defined Benefit Plan Disclosure [Line Items]
Total assets	365	356
Measured using NAV practical expedient
Defined Benefit Plan Disclosure [Line Items]
Total assets	69	68
Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Total assets	$ 2	$ 5
Percent of total assets	0%	1%
Cash and cash equivalents | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total assets	$ 2	$ 5
Total equity investments
Defined Benefit Plan Disclosure [Line Items]
Total assets	$ 139	$ 147
Percent of total assets	30%	33%
Total equity investments | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total assets	$ 139	$ 147
U.S. large-cap
Defined Benefit Plan Disclosure [Line Items]
Total assets	$ 114	$ 106
Percent of total assets	25%	24%
U.S. large-cap | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total assets	$ 114	$ 106
U.S. small and mid-cap
Defined Benefit Plan Disclosure [Line Items]
Total assets	$ 25	$ 21
Percent of total assets	5%	5%
U.S. small and mid-cap | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total assets	$ 25	$ 21
Emerging markets
Defined Benefit Plan Disclosure [Line Items]
Total assets		$ 20
Percent of total assets		4%
Emerging markets | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total assets		$ 20
Total fixed-income investments
Defined Benefit Plan Disclosure [Line Items]
Total assets	$ 295	$ 272
Percent of total assets	65%	60%
Total fixed-income investments | Level 1
Defined Benefit Plan Disclosure [Line Items]
Total assets	$ 26	$ 25
Total fixed-income investments | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total assets	224	204
Total fixed-income investments | Measured using NAV practical expedient
Defined Benefit Plan Disclosure [Line Items]
Total assets	45	43
Emerging markets bond fund
Defined Benefit Plan Disclosure [Line Items]
Total assets	$ 30	$ 29
Percent of total assets	7%	6%
Emerging markets bond fund | Measured using NAV practical expedient
Defined Benefit Plan Disclosure [Line Items]
Total assets	$ 30	$ 29
Intermediate-term investment grade U.S. government/ corporate bonds
Defined Benefit Plan Disclosure [Line Items]
Total assets	$ 57	$ 60
Percent of total assets	12%	13%
Intermediate-term investment grade U.S. government/ corporate bonds | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total assets	$ 57	$ 60
Long duration corporate bonds
Defined Benefit Plan Disclosure [Line Items]
Total assets	$ 146	$ 144
Percent of total assets	32%	32%
Long duration corporate bonds | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total assets	$ 146	$ 144
U.S. Treasury Inflation-Protected Securities (TIPs)
Defined Benefit Plan Disclosure [Line Items]
Total assets	$ 26	$ 25
Percent of total assets	6%	6%
U.S. Treasury Inflation-Protected Securities (TIPs) | Level 1
Defined Benefit Plan Disclosure [Line Items]
Total assets	$ 26	$ 25
Emerging markets equity mutual fund
Defined Benefit Plan Disclosure [Line Items]
Total assets	$ 21
Percent of total assets	5%
Emerging markets equity mutual fund | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total assets	$ 21
Private investment fund—high yield securities
Defined Benefit Plan Disclosure [Line Items]
Total assets	$ 15	$ 14
Percent of total assets	3%	3%
Private investment fund—high yield securities | Measured using NAV practical expedient
Defined Benefit Plan Disclosure [Line Items]
Total assets	$ 15	$ 14
Other investment—private real estate fund
Defined Benefit Plan Disclosure [Line Items]
Total assets	$ 24	$ 25
Percent of total assets	5%	6%
Other investment—private real estate fund | Measured using NAV practical expedient
Defined Benefit Plan Disclosure [Line Items]
Total assets	$ 24	$ 25

Pension And Other Retirement_12

Pension And Other Retirement Benefits - Estimated Future Benefits Payments for Retirement Plans (Detail) - U.S. Plans $ in Millions	Dec. 31, 2024 USD ($)
Pension Plans
Defined Benefit Plan Disclosure [Line Items]
2025	$ 28
2026	28
2027	30
2028	31
2029	32
2030 - 2034	174
Other Retirement Plans
Defined Benefit Plan Disclosure [Line Items]
2025	2
2026	2
2027	3
2028	3
2029	3
2030 - 2034	$ 19

Stock-Based Compensation Plan_2

Stock-Based Compensation Plans - Additional Information (Detail) - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Equity Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense	$ 12
Weighted average period to recognize expense	1 year 10 months 24 days
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense	$ 234
Weighted average period to recognize expense	2 years 4 months 24 days
Performance Based Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense	$ 56
Weighted average period to recognize expense	2 years
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserve for issuance or grant (shares)	6
Discount allowed to employees on purchase of shares under ESPP plan	5%	5%	5%
1998 and 2001 Plan | Equity Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)	4 years
1998 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserve for issuance or grant (shares)	33
2001 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserve for issuance or grant (shares)	54.6
2001 Plan | Instruments Other Than Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserve for issuance or grant (shares)	10.7
Directors' Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserve for issuance or grant (shares)	1.7
Award vesting period (in years)	1 year
Minimum | Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee subscription rate as a percentage of compensation	1%
Minimum | 1998 and 2001 Plan | Equity Option | Employees at or Near Retirement Eligibility
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)	1 year
Minimum | 1998 and 2001 Plan | Performance Based Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)	2 years
Maximum | Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee subscription rate as a percentage of compensation	10%
Maximum | 1998 and 2001 Plan | Equity Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration period	10 years
Maximum | 1998 and 2001 Plan | Equity Option | Employees at or Near Retirement Eligibility
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)	4 years
Maximum | 1998 and 2001 Plan | Performance Based Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)	4 years

Stock-Based Compensation Plan_3

Stock-Based Compensation Plans - Stock-Based Compensation Cost and Associated Tax Benefit (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Share-Based Payment Arrangement [Abstract]
Compensation expense	$ 221	$ 193	$ 169
Tax benefit	$ 48	$ 45	$ 41

Stock-Based Compensation Plan_4

Stock-Based Compensation Plans - Weighted Average Assumptions used in Determining Fair Value for Options Granted (Detail) - $ / shares	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Share-Based Payment Arrangement [Abstract]
Expected dividend yield	0.91%	1.04%	0.86%
Expected stock volatility	28%	29%	27%
Risk-free interest rate	4.34%	4.19%	1.91%
Expected holding period (in years)	5 years 10 months 24 days	5 years 9 months 18 days	5 years 7 months 6 days
Weighted average grant date fair value per share (in USD per share)	$ 120.42	$ 94.71	$ 84

Stock-Based Compensation Plan_5

Stock-Based Compensation Plans - Summary of Option Activity (Details) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2024 USD ($) $ / shares shares
Shares
Shares, outstanding, beginning balance (in shares) | shares	0.8
Shares, granted (in shares) | shares	0.2
Shares, exercised (in shares) | shares	(0.3)
Shares, outstanding, ending balance (in shares) | shares	0.7
Shares, vested and expected to vest (in shares) | shares	0.7
Shares, exercisable (in shares) | shares	0.4
Weighted Average Exercise Price Per Share
Weighted average exercise price per share, beginning balance (in USD per share) | $ / shares	$ 212.29
Weighted average exercise price per share, granted (in USD per share) | $ / shares	372.52
Weighted average exercise price per share, exercised (in USD per share) | $ / shares	173.64
Weighted average exercise price per share, ending balance (in USD per share) | $ / shares	267.64
Weighted average exercise price per share, vested and expected to vest (in USD per share) | $ / shares	267.26
Weighted average exercise price per share, exercisable (in USD per share) | $ / shares	$ 207.94
Weighted Average Remaining Contractual Term
Weighted average remaining contractual term, outstanding (in years)	5 years 10 months 24 days
Weighted average remaining contractual term, vested and expected to vest (in years)	5 years 10 months 24 days
Weighted average remaining contractual term (in years)	4 years
Aggregate Intrinsic Value
Aggregate intrinsic value, outstanding | $	$ 140
Aggregate intrinsic value, vested and expected to vest | $	139
Aggregate intrinsic value, exercisable | $	$ 99

Stock-Based Compensation Plan_6

Stock-Based Compensation Plans - Stock Option Exercises and Restricted Stock Vesting (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Proceeds from stock option exercises	$ 53	$ 32	$ 8
Aggregate intrinsic value	76	58	9
Tax benefit realized upon exercise	13	14	2
Restricted Stock
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Fair value of shares vested	199	164	180
Tax benefit realized upon vesting	48	40	42
Performance Based Restricted Stock
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Fair value of shares vested	40	24	50
Tax benefit realized upon vesting	$ 9	$ 3	$ 7

Stock-Based Compensation Plan_7

Stock-Based Compensation Plans - Summary of Nonvested Restricted Stock (Details) - Non Vested Restricted Stock shares in Millions	12 Months Ended
	Dec. 31, 2024 $ / shares shares
Shares
Shares, beginning balance (in shares) | shares	1.3
Shares, granted (in shares) | shares	0.6
Shares, vested (in shares) | shares	(0.5)
Shares, forfeited (in shares) | shares	(0.1)
Shares, ending balance (in shares) | shares	1.3
Weighted Average Grant Date Fair Value Per Share
Weighted average grant date fair value per share, beginning balance (in USD per share) | $ / shares	$ 300.39
Weighted average grant date fair value per share, granted (in USD per share) | $ / shares	373.54
Weighted average grant date fair value per share, vested (in USD per share) | $ / shares	300.20
Weighted average grant date fair value per share, forfeited (in USD per share) | $ / shares	327.53
Weighted average grant date fair value per share, ending balance (in USD per share) | $ / shares	$ 330.84

Stock-Based Compensation Plan_8

Stock-Based Compensation Plans - Summary of Performance Based Restricted Stock (Details) - Performance Based Restricted Stock shares in Millions	12 Months Ended
	Dec. 31, 2024 $ / shares shares
Performance-Based Restricted Stock
Shares, beginning balance (in shares) | shares	0.3
Shares, granted (in shares) | shares	0.1
Shares, vested (in shares) | shares	(0.1)
Shares, ending balance (in shares) | shares	0.3
Performance based restricted stock, Weighted Average Grant Date Fair Value Per Share
Weighted average grant date fair value per share, beginning balance (in USD per share) | $ / shares	$ 308.12
Weighted average grant date fair value per share, granted (in USD per share) | $ / shares	354.67
Weighted average grant date fair value per share, vested (in USD per share) | $ / shares	331.60
Weighted average grant date fair value per share, ending balance (in USD per share) | $ / shares	$ 330.78

Income Taxes - Provision for In

Income Taxes - Provision for Income Taxes (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Current:
Federal	$ 280	$ 76	$ 106
State and Local	106	67	17
Non-U.S.	316	222	215
Total current	702	365	338
Deferred:
Federal	(21)	(14)	57
State and Local	(6)	(4)	10
Non-U.S.	(35)	(20)	(19)
Total deferred	(62)	(38)	48
Total provision for income taxes	$ 640	$ 327	$ 386

Income Taxes - Reconciliation o

Income Taxes - Reconciliation of United States Federal Statutory Tax Rate to Effective Tax Rate on Income Before Provision for Income Taxes (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income Tax Disclosure [Abstract]
U.S. statutory tax rate	21%	21%	21%
State and local taxes, net of federal tax benefit	3.70%	2.50%	0.80%
Foreign operations	(0.30%)	0.40%	(0.20%)
Release of UTP reserves	(0.40%)	(5.70%)	0%
Other	(0.30%)	(1.30%)	0.30%
ETR	23.70%	16.90%	21.90%
Income tax paid	$ 613	$ 344	$ 488

Income Taxes - Source of income

Income Taxes - Source of income Before Provision for Income Taxes (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income Tax Disclosure [Abstract]
U.S.	$ 1,446	$ 892	$ 804
Non-U.S.	1,253	1,043	956
Income before provision for income taxes	$ 2,699	$ 1,935	$ 1,760

Income Taxes - Components of De

Income Taxes - Components of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Deferred tax assets:
Account receivable allowances	$ 10	$ 9
Accumulated depreciation and amortization	9	19
Stock-based compensation	60	60
Accrued compensation and benefits	50	53
Capitalized costs	20	25
Operating lease liabilities	84	103
Deferred revenue	211	200
Net operating loss	58	38
Restructuring	6	7
Uncertain tax positions	33	29
Self-insured related reserves	7	6
Interest expense carryforward	20	8
Other	12	5
Total deferred tax assets	580	562
Deferred tax liabilities:
Accumulated depreciation and amortization of intangible assets and capitalized software	(522)	(551)
ROU Assets	(56)	(67)
Capital gains	(13)	(20)
Self-insured related income	(7)	(6)
Deferred tax on unremitted foreign earnings	(20)	(14)
Gain on net investment hedges - OCI	(82)	(5)
Other	(11)	(19)
Total deferred tax liabilities	(711)	(682)
Net deferred tax liabilities	(131)	(120)
Valuation allowance	(25)	(24)	$ (21)	$ (18)
Total net deferred tax liabilities	$ (156)	$ (144)

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Sep. 30, 2018
Income Tax Disclosure [Abstract]
Revision of estimated repatriation tax liability resulting from tax reform legislation					$ 236
Revision of estimated repatriation tax liability resulting from tax reform legislation, due at end of year	$ 12
Excess tax benefits from stock compensation	(27)
Unrecognized tax benefits, reduction resulting from lapse of applicable statute of limitations and settlement	11
Unrecognized tax benefits, decrease resulting from current period tax positions	2
Valuation allowance	25	$ 24	$ 21	$ 18
Unrecognized tax benefits	211	196	322	$ 388
Interest accrued on UTPs	$ 47	$ 36	$ 47
Inflation reduction act impact on ETR	In August 2022, the U.S. Congress passed the Inflation Reduction Act, which included a corporate minimum tax on book earnings of 15%, an excise tax on corporate share repurchases of 1%, and certain climate change and energy tax credit incentives. The adoption of a corporate minimum tax of 15% did not have a significant impact on Moody’s ETR. The excise tax of 1% on corporate share buybacks is recorded to shareholders' equity and does not have an impact on the Company’s ETR.

Income Taxes - Reconciliation_2

Income Taxes - Reconciliation of Uncertain Tax Positions (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Reconciliation of Unrecognized Tax Benefits
Unrecognized tax positions, beginning balance	$ 196	$ 322	$ 388
Additions for tax positions related to the current year	33	21	12
Additions for tax positions of prior years	11	3	12
Reductions for tax positions of prior years	(11)	(17)	(27)
Settlements with taxing authorities	(3)	(108)	(30)
Lapse of statute of limitations	(15)	(25)	(33)
Unrecognized tax positions, ending balance	$ 211	$ 196	$ 322

Indebtedness - Summary of Total

Indebtedness - Summary of Total Indebtedness (Detail) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Principal Amount	$ 7,694	$ 7,281
Fair Value of Interest Rate Swap	(169)	(183)
Unamortized (Discount) Premium	(52)	(51)
Unamortized Debt Issuance Costs	(45)	(46)
Carrying Amount	7,428	7,001
Current portion	(697)	0
Long-term debt	$ 6,731	$ 7,001
5.25% 2014 Senior Notes, due 2044
Debt Instrument [Line Items]
Notes payable, interest rate	5.25%	5.25%
Principal Amount	$ 600	$ 600
Fair Value of Interest Rate Swap	(32)	(34)
Unamortized (Discount) Premium	3	3
Unamortized Debt Issuance Costs	(4)	(4)
Carrying Amount	$ 567	$ 565
1.75% 2015 Senior Notes, due 2027
Debt Instrument [Line Items]
Notes payable, interest rate	1.75%	1.75%
Principal Amount	$ 518	$ 552
Fair Value of Interest Rate Swap	0	0
Unamortized (Discount) Premium	0	0
Unamortized Debt Issuance Costs	(1)	(1)
Carrying Amount	$ 517	$ 551
3.25% 2017 Senior Notes, due 2028
Debt Instrument [Line Items]
Notes payable, interest rate	3.25%	3.25%
Principal Amount	$ 500	$ 500
Fair Value of Interest Rate Swap	(13)	(26)
Unamortized (Discount) Premium	(2)	(2)
Unamortized Debt Issuance Costs	(1)	(2)
Carrying Amount	$ 484	$ 470
4.25% 2018 Senior Notes, due 2029
Debt Instrument [Line Items]
Notes payable, interest rate	4.25%	4.25%
Principal Amount	$ 400	$ 400
Fair Value of Interest Rate Swap	(35)	(34)
Unamortized (Discount) Premium	(1)	(2)
Unamortized Debt Issuance Costs	(1)	(2)
Carrying Amount	$ 363	$ 362
4.875% 2018 Senior Notes, due 2048
Debt Instrument [Line Items]
Notes payable, interest rate	4.875%	4.875%
Principal Amount	$ 400	$ 400
Fair Value of Interest Rate Swap	(35)	(36)
Unamortized (Discount) Premium	(6)	(6)
Unamortized Debt Issuance Costs	(3)	(3)
Carrying Amount	$ 356	$ 355
0.950% 2019 Senior Notes, due 2030
Debt Instrument [Line Items]
Notes payable, interest rate	0.95%	0.95%
Principal Amount	$ 776	$ 829
Fair Value of Interest Rate Swap	0	0
Unamortized (Discount) Premium	(1)	(2)
Unamortized Debt Issuance Costs	(3)	(4)
Carrying Amount	$ 772	$ 823
3.75% 2020 Senior Notes, due 2025
Debt Instrument [Line Items]
Notes payable, interest rate	3.75%	3.75%
Principal Amount	$ 700	$ 700
Fair Value of Interest Rate Swap	(3)	(16)
Unamortized (Discount) Premium	0	(1)
Unamortized Debt Issuance Costs	0	(1)
Carrying Amount	$ 697	$ 682
3.25% 2020 Senior Notes, due 2050
Debt Instrument [Line Items]
Notes payable, interest rate	3.25%	3.25%
Principal Amount	$ 300	$ 300
Fair Value of Interest Rate Swap	0	0
Unamortized (Discount) Premium	(4)	(4)
Unamortized Debt Issuance Costs	(3)	(3)
Carrying Amount	$ 293	$ 293
2.55% 2020 Senior Notes, due 2060
Debt Instrument [Line Items]
Notes payable, interest rate	2.55%	2.55%
Principal Amount	$ 300	$ 300
Fair Value of Interest Rate Swap	0	0
Unamortized (Discount) Premium	(2)	(2)
Unamortized Debt Issuance Costs	(3)	(3)
Carrying Amount	$ 295	$ 295
2.00% 2021 Senior Notes, due 2031
Debt Instrument [Line Items]
Notes payable, interest rate	2%	2%
Principal Amount	$ 600	$ 600
Fair Value of Interest Rate Swap	0	0
Unamortized (Discount) Premium	(6)	(6)
Unamortized Debt Issuance Costs	(4)	(4)
Carrying Amount	$ 590	$ 590
2.75% 2021 Senior Notes, due 2041
Debt Instrument [Line Items]
Notes payable, interest rate	2.75%	2.75%
Principal Amount	$ 600	$ 600
Fair Value of Interest Rate Swap	0	0
Unamortized (Discount) Premium	(12)	(12)
Unamortized Debt Issuance Costs	(5)	(5)
Carrying Amount	$ 583	$ 583
3.10% 2021 Senior Notes, due 2061
Debt Instrument [Line Items]
Notes payable, interest rate	3.10%	3.10%
Principal Amount	$ 500	$ 500
Fair Value of Interest Rate Swap	0	0
Unamortized (Discount) Premium	(7)	(7)
Unamortized Debt Issuance Costs	(5)	(5)
Carrying Amount	$ 488	$ 488
3.75% 2022 Senior Notes, due 2052
Debt Instrument [Line Items]
Notes payable, interest rate	3.75%	3.75%
Principal Amount	$ 500	$ 500
Fair Value of Interest Rate Swap	(43)	(29)
Unamortized (Discount) Premium	(8)	(8)
Unamortized Debt Issuance Costs	(5)	(5)
Carrying Amount	$ 444	$ 458
4.25% 2022 Senior Notes, due 2032
Debt Instrument [Line Items]
Notes payable, interest rate	4.25%	4.25%
Principal Amount	$ 500	$ 500
Fair Value of Interest Rate Swap	(8)	(8)
Unamortized (Discount) Premium	(2)	(2)
Unamortized Debt Issuance Costs	(3)	(4)
Carrying Amount	$ 487	$ 486
5.00% 2024 Senior Notes, due 2034
Debt Instrument [Line Items]
Notes payable, interest rate	5%
Principal Amount	$ 500
Fair Value of Interest Rate Swap	0
Unamortized (Discount) Premium	(4)
Unamortized Debt Issuance Costs	(4)
Carrying Amount	$ 492

Indebtedness - Schedule of Cred

Indebtedness - Schedule of Credit Facilities (Details) - USD ($)	Dec. 31, 2024	May 06, 2024	Dec. 31, 2023	Dec. 17, 2021
2021 Credit Facility
Line of Credit Facility [Line Items]
Maximum Borrowing Capacity				$ 1,250,000,000
Drawn	$ 0		$ 0
Undrawn	0		1,250,000,000
2024 Credit Facility
Line of Credit Facility [Line Items]
Maximum Borrowing Capacity		$ 1,250,000,000
Drawn	0		0
Undrawn	$ 1,250,000,000		$ 0

Indebtedness - Additional Infor

Indebtedness - Additional Information (Detail) - USD ($)		12 Months Ended
	May 06, 2024	Dec. 31, 2024	Dec. 17, 2021	Aug. 03, 2016
Debt Instrument [Line Items]
Debt instrument, covenant compliance		At December 31, 2024, the Company was in compliance with all covenants contained within all of the debt agreements. All of the debt agreements contain cross default provisions which state that default under one of the aforementioned debt instruments could in turn permit lenders under other debt instruments to declare borrowings outstanding under those instruments to be immediately due and payable. As of December 31, 2024, there were no such cross defaults.
2024 Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 1,250,000,000
Term	5 years
2024 Credit Facility | Term Loan Facility Any Fiscal Quarter
Debt Instrument [Line Items]
Debt/EBITDA ratio		4
2024 Credit Facility | First Three Consecutive Quarters immediately following Any Acquisition
Debt Instrument [Line Items]
Debt/EBITDA ratio		4.5
2024 Credit Facility | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate (percent)		0.805%
Facility fee basis points		0.07%
Contingent consideration arising from acquisitions, payment or settlement		$ 500,000,000
2024 Credit Facility | Maximum
Debt Instrument [Line Items]
Basis spread on variable rate (percent)		1.225%
Facility fee basis points		0.15%
2021 Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity			$ 1,250,000,000
Commercial Paper
Debt Instrument [Line Items]
Maximum borrowing capacity				$ 1,000,000,000
Commercial paper		$ 0
Commercial Paper | Maximum
Debt Instrument [Line Items]
Term		397 days

Indebtedness - Principal Paymen

Indebtedness - Principal Payments Due on Long-Term Borrowings (Detail) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Debt Disclosure [Abstract]
2025	$ 700
2026	0
2027	518
2028	500
2029	400
Thereafter	5,576
Total principal payment	$ 7,694	$ 7,281

Indebtedness - Summary of Compo

Indebtedness - Summary of Components of Interest as Presented in Consolidated Statements of Operations (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Debt Disclosure [Abstract]
Expense on borrowings	$ (300)	$ (296)	$ (216)
(Expense) income on UTPs and other tax related liabilities	(13)	8	(13)
Net periodic pension costs--interest component	(26)	(26)	(17)
Income	102	63	15
Interest expense, net	(237)	(251)	(231)
Interest paid	280	$ 281	$ 198
Unrecognized tax benefits, decrease in interest on income taxes expense due to resolution of tax matters	$ 22

Indebtedness - Fair Value and C

Indebtedness - Fair Value and Carrying Value of Long-Term Debt (Detail) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Carrying Amount	$ 7,428	$ 7,001
Level 2
Debt Instrument [Line Items]
Estimated Fair Value	$ 6,601	$ 6,402

Capital Stock - Additional Info

Capital Stock - Additional Information (Detail) - $ / shares		12 Months Ended
	Feb. 12, 2025	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Class of Stock [Line Items]
All classes of stock, shares authorized (in shares)		1,020,000,000
Shares of all classes of stock, par value (in usd per share)		$ 0.01
Preferred stock, shares authorized (in shares)		10,000,000	10,000,000
Shares issued during the period for stock-based compensation plans (in shares)		700,000
Subsequent Event | O 2024 Q4 Dividends
Class of Stock [Line Items]
Dividend declared, declaration date	Feb. 12, 2025
Quarterly dividend declared (in dollars per share)	$ 0.94
Dividend declared, payable date	Mar. 14, 2025
Dividend declared, record date	Feb. 25, 2025
Common Stock
Class of Stock [Line Items]
Common stock, shares authorized (in shares)		1,000,000,000	1,000,000,000
Series Common Stock
Class of Stock [Line Items]
Common stock, shares authorized (in shares)		10,000,000	10,000,000
Treasury Stock
Class of Stock [Line Items]
Treasury shares repurchased (in shares)		2,900,000	1,500,000	3,100,000

Capital Stock - Share Repurchas

Capital Stock - Share Repurchase Programs (Detail) $ in Millions	Dec. 31, 2024 USD ($)
Equity, Class of Treasury Stock [Line Items]
Remaining Authority	$ 1,567
October 15. 2024
Equity, Class of Treasury Stock [Line Items]
Amount Authorized	1,500
Remaining Authority	1,500
February 5. 2024
Equity, Class of Treasury Stock [Line Items]
Amount Authorized	1,000
Remaining Authority	$ 67

Capital Stock - Dividends Paid

Capital Stock - Dividends Paid (Detail) - $ / shares	3 Months Ended												12 Months Ended
	Dec. 31, 2024	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Stockholders' Equity Note [Abstract]
Dividends declared per share (in USD per share)	$ 0.85	$ 0.85	$ 0.85	$ 0.85	$ 0.77	$ 0.77	$ 0.77	$ 0.77	$ 0.70	$ 0.70	$ 0.70	$ 0.70	$ 3.40	$ 3.08	$ 2.80
Dividends per share paid (in USD per share)	$ 0.85	$ 0.85	$ 0.85	$ 0.85	$ 0.77	$ 0.77	$ 0.77	$ 0.77	$ 0.70	$ 0.70	$ 0.70	$ 0.70	$ 3.40	$ 3.08	$ 2.80

Leases - Additional Information

Leases - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Lessee, Lease, Description [Line Items]
Restructuring Charges	$ 59	$ 87	$ 114
Unrecorded unconditional purchase obligation	$ 140
Lessee, Operating Lease, Lease Not yet Commenced, Term of Contract	15 years
2022 - 2023 Geolocation Restructuring Program
Lessee, Lease, Description [Line Items]
Restructuring Charges	$ 14	87	113
Real Estate | 2022 - 2023 Geolocation Restructuring Program
Lessee, Lease, Description [Line Items]
Restructuring Charges	$ 0	36	27
Restructuring Charges
Lessee, Lease, Description [Line Items]
Impairment of right-of-use		$ 32	$ 23
Minimum
Lessee, Lease, Description [Line Items]
Operating lease, renewal term	1 year
Maximum
Lessee, Lease, Description [Line Items]
Operating lease, renewal term	20 years

Leases - Components of Lease Co

Leases - Components of Lease Cost (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Lease, Cost [Abstract]
Operating lease cost	$ 88	$ 93	$ 102
Sublease income	(7)	(7)	(7)
Variable lease cost	22	22	20
Total lease cost	$ 103	$ 108	$ 115

Leases - Operating Leases Infor

Leases - Operating Leases Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Leases [Abstract]
Cash paid for amounts included in the measurement of operating lease liabilities	$ 120	$ 119	$ 118
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 21	$ 40	$ 35
Weighted-average remaining lease term (in years)	3 years 9 months 18 days	4 years 4 months 24 days	4 years 10 months 24 days
Weighted-average discount rate applied to operating leases (percent)	3.20%	3.20%	3.10%

Leases - Operating Leases, Futu

Leases - Operating Leases, Future Minimum Payment (Detail) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Leases [Abstract]
2025	$ 111
2026	91
2027	74
2028	23
2029	19
Thereafter	20
Total lease payments (undiscounted)	338
Less: Interest	20
Present value of lease liabilities:	318
Lease liabilities - current	102	$ 108
Lease liabilities - noncurrent	$ 216	$ 306

Contingencies - Additional Info

Contingencies - Additional Information (Detail) $ in Millions	Sep. 03, 2024 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Payments for Legal Settlements	$ 20

Segment Information - Additiona

Segment Information - Additional Information (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2024 USD ($) segment lineOfBusiness
Segment Reporting Information [Line Items]
Number of operating segments | segment	2
Number of reportable segments | segment	2
MA
Segment Reporting Information [Line Items]
Number of lines of business | lineOfBusiness	3
MIS
Segment Reporting Information [Line Items]
Number of lines of business | lineOfBusiness	5
Strategic and Operational Efficiency Restructuring Program | MA | Minimum
Segment Reporting Information [Line Items]
Restructuring and related cost, expected cost	$ 125
Strategic and Operational Efficiency Restructuring Program | MA | Maximum
Segment Reporting Information [Line Items]
Restructuring and related cost, expected cost	155
Strategic and Operational Efficiency Restructuring Program | MIS | Minimum
Segment Reporting Information [Line Items]
Restructuring and related cost, expected cost	75
Strategic and Operational Efficiency Restructuring Program | MIS | Maximum
Segment Reporting Information [Line Items]
Restructuring and related cost, expected cost	$ 95

Segment Information - Financial

Segment Information - Financial Information by Segment (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting Information, Operating Income (Loss) [Abstract]
Revenue	$ 7,088	$ 5,916	$ 5,468
Compensation expense	2,539	2,241	2,056
Non-compensation expense	1,141	1,078	1,084
Operating, SG&A	3,680	3,319	3,140
Adjusted Operating Income	3,408	2,597	2,328
Depreciation and amortization	431	373	331
Restructuring	59	87	114
Charges related to asset abandonment	43	0	0
Operating income	2,875	2,137	1,883
Non-operating (expense) income, net	(176)	(202)	(123)
Income before provision for income taxes	2,699	1,935	1,760
Eliminations
Segment Reporting Information, Operating Income (Loss) [Abstract]
Revenue	(206)	(199)	(182)
Intersegment expense	(206)	(199)	(182)
Operating, SG&A	(206)	(199)	(182)
Adjusted Operating Income	0	0	0
Depreciation and amortization	0	0	0
Restructuring	0	0	0
Operating Segments
Segment Reporting Information, Operating Income (Loss) [Abstract]
Revenue	7,088	5,916	5,468
MA
Segment Reporting Information, Operating Income (Loss) [Abstract]
Revenue	3,295	3,056	2,769
Compensation expense	1,370	1,238	1,116
Non-compensation expense	731	708	647
MA | Eliminations
Segment Reporting Information, Operating Income (Loss) [Abstract]
Revenue	13	13	8
Intersegment expense	193	186	174
MA | Operating Segments
Segment Reporting Information, Operating Income (Loss) [Abstract]
Revenue	3,308	3,069	2,777
Operating, SG&A	2,294	2,132	1,937
Adjusted Operating Income	1,014	937	840
Depreciation and amortization	353	298	250
Restructuring	42	59	49
Charges related to asset abandonment	43	0
MIS
Segment Reporting Information, Operating Income (Loss) [Abstract]
Revenue	3,793	2,860	2,699
Compensation expense	1,169	1,003	940
Non-compensation expense	410	370	437
MIS | Eliminations
Segment Reporting Information, Operating Income (Loss) [Abstract]
Revenue	193	186	174
Intersegment expense	13	13	8
MIS | Operating Segments
Segment Reporting Information, Operating Income (Loss) [Abstract]
Revenue	3,986	3,046	2,873
Operating, SG&A	1,592	1,386	1,385
Adjusted Operating Income	2,394	1,660	1,488
Depreciation and amortization	78	75	81
Restructuring	17	28	$ 65
Charges related to asset abandonment	$ 0	$ 0

Segment Information - Cumulativ

Segment Information - Cumulative Restructuring Expense (Details) $ in Millions	Dec. 31, 2024 USD ($)
2022 - 2023 Geolocation Restructuring Program
Segment Reporting Information [Line Items]
Cumulative expense incurred	$ 214
Strategic and Operational Efficiency Restructuring Program
Segment Reporting Information [Line Items]
Cumulative expense incurred	45
MA | 2022 - 2023 Geolocation Restructuring Program
Segment Reporting Information [Line Items]
Cumulative expense incurred	116
MA | Strategic and Operational Efficiency Restructuring Program
Segment Reporting Information [Line Items]
Cumulative expense incurred	34
MIS | 2022 - 2023 Geolocation Restructuring Program
Segment Reporting Information [Line Items]
Cumulative expense incurred	98
MIS | Strategic and Operational Efficiency Restructuring Program
Segment Reporting Information [Line Items]
Cumulative expense incurred	$ 11

Segment Information - Consolida

Segment Information - Consolidated Revenue Information by Geographic Area (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting Information [Line Items]
Revenue	$ 7,088	$ 5,916	$ 5,468
Long-lived assets	8,756	8,885	8,897
U.S.
Segment Reporting Information [Line Items]
Revenue	3,836	3,071	2,865
Long-lived assets	4,395	4,323	4,408
Non-U.S.
Segment Reporting Information [Line Items]
Revenue	3,252	2,845	2,603
Long-lived assets	4,361	4,562	4,489
EMEA
Segment Reporting Information [Line Items]
Revenue	2,174	1,886	1,708
Asia-Pacific
Segment Reporting Information [Line Items]
Revenue	629	570	539
Americas
Segment Reporting Information [Line Items]
Revenue	$ 449	$ 389	$ 356

Valuation and Qualifying Acco_3

Valuation and Qualifying Accounts - Summary of Activity for Valuation Allowances (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance, accounts receivable allowance	$ (35)	$ (40)	$ (32)
Charged to costs and expenses	(15)	(22)	(25)
Deductions, accounts receivable allowance	18	27	17
Ending balance, accounts receivable allowance	(32)	(35)	(40)
Deferred Tax Assets, Valuation Allowance [Roll Forward]
Beginning balance, deferred tax assets valuation allowance	(24)	(21)	(18)
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	(2)	(2)	(4)
Deductions, deferred tax assets valuation allowance	1	(1)	1
Ending balance, deferred tax assets valuation allowance	$ (25)	$ (24)	$ (21)

OTHER NON-OPERATING (EXPENSE)_3

OTHER NON-OPERATING (EXPENSE) INCOME, NET (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Other Income and Expenses [Abstract]
FX (loss) gain	$ 0	$ (30)	$ (10)
Net periodic pension income - non-service and non-interest cost components	30	35	24
Income from investments in non-consolidated affiliates	15	19	17
Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Gain	7	0	0
Gain (loss) on investments	13	14	(14)
Other	(4)	11	21
Total	61	49	38
Loss recorded pursuant to an immaterial out-of-period adjustment, net of tax		23
FX translation losses reclassified to net income	$ 0	$ 0	$ 20

OTHER NON-OPERATING (EXPENSE)_4

OTHER NON-OPERATING (EXPENSE) INCOME, NET - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Restructuring Cost and Reserve [Line Items]
Charges related to asset abandonment	$ 43	$ 0	$ 0
Employee Severance
Restructuring Cost and Reserve [Line Items]
Charges related to asset abandonment	12
Accelerated Amortization Charges
Restructuring Cost and Reserve [Line Items]
Charges related to asset abandonment	$ 31