Moody's (MCO) 10-Q 1 May 20 2020 Q1 Quarterly report Financial data

Cover Page

Cover Page shares in Millions	3 Months Ended
	Mar. 31, 2020shares
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2020
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 Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding (in shares)	187.5
Entity Central Index Key	0001059556
Document Fiscal Period Focus	Q1
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2020
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% 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% 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

CONSOLIDATED STATEMENTS OF OPER

CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Income Statement [Abstract]
Revenue	$ 1,290	$ 1,142
Expenses
Operating	340	342
Selling, general and administrative	301	281
Restructuring	(1)	6
Depreciation and amortization	49	50
Acquisition-Related Expenses	0	1
Loss pursuant to the divestiture of MAKS	9	0
Total expenses	698	680
Operating income	592	462
Non-operating (expense) income, net
Interest expense, net	(40)	(52)
Other non-operating income, net	12	2
Total non-operating expense, net	(28)	(50)
Income before provisions for income taxes	564	412
Provision for income taxes	77	38
Net income	487	374
Less: Net (loss) income attributable to noncontrolling interests	(1)	1
Net income attributable to Moody's	$ 488	$ 373
Earnings per share attributable to Moody's common shareholders
Basic (in usd per share)	$ 2.60	$ 1.96
Diluted (in usd per share)	$ 2.57	$ 1.93
Weighted average number of shares outstanding
Basic (in shares)	187.5	190.4
Diluted (in shares)	189.6	192.8

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Statement of Comprehensive Income [Abstract]
Net Income	$ 487	$ 374
Foreign Currency Adjustments:
Foreign currency translation adjustment - Pre Tax	(175)	(27)
Foreign currency translation adjustments - Tax	5	0
Foreign currency translation adjustments - Net of Tax	(170)	(27)
Net gains on net investment hedges - Pre Tax	119	30
Net gains on net investment hedges, Tax	(30)	(7)
Net gains on net investment hedges, Net of Tax	89	23
Cash Flow Hedges:
Net realized and unrealized (losses) gains on cash flow hedges - Pre Tax	(48)	0
Net realized and unrealized (losses) gains on cash flow hedges - Tax	12	0
Net realized and unrealized (losses) gains on cash flow hedges - Net of Tax	(36)	0
Reclassification of losses (gains) included in net income - Pre Tax	1	0
Reclassification of losses (gains) included in net income - Tax	0	0
Reclassification of losses (gains) included in net income - Net of Tax	1	0
Pension and Other Retirement Benefits:
Amortization of actuarial losses and prior service costs included in net income - Pre Tax	2	1
Amortization of actuarial losses and prior service costs included in net income - Tax	(1)	(1)
Amortization of actuarial losses and prior service costs included in net income - Net of Tax	1	0
Net actuarial (losses) gains and prior service costs - Pre Tax	(1)	1
Net actuarial (losses) gains and prior service costs - Tax	0	0
Net actuarial (losses) gains and prior service costs - Net of Tax	(1)	1
Total other comprehensive income (loss) - Pre Tax	(102)	5
Total other comprehensive income (loss) - Tax	(14)	(8)
Total other comprehensive income (loss) - Net of Tax	(116)	(3)
Comprehensive income	371	371
Less: comprehensive income (loss) attributable to noncontrolling interests	(2)	8
Comprehensive Income Attributable to Moody's	$ 373	$ 363

CONSOLIDATED BALANCE SHEETS (UN

CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 2,141	$ 1,832
Short-term investments	90	98
Accounts receivable, net of allowance for credit losses of $42 in 2020 and $20 in 2019	1,413	1,419
Other current assets	350	330
Total current assets	3,994	3,679
Property and equipment, net of accumulated depreciation of $853 in 2020 and $839 in 2019	285	292
Operating lease right-of-use assets	437	456
Goodwill	4,122	3,722
Intangible assets, net	1,709	1,498
Deferred tax assets, net	165	229
Other assets	594	389
Total assets	11,306	10,265
Current liabilities:
Accounts payable and accrued liabilities	664	773
Current portion of operating lease liabilities	89	89
Commercial Paper	485	0
Deferred revenue	1,113	1,050
Total current liabilities	2,351	1,912
Non-current portion of deferred revenue	109	112
Long-term debt	6,303	5,581
Deferred tax liabilities, net	424	357
Uncertain tax positions	448	477
Operating lease liabilities	463	485
Other liabilities	403	504
Total liabilities	10,501	9,428
Contingencies (Note 20)	0	0
Redeemable noncontrolling interest	6	6
Shareholders' equity:
Preferred stock, par value $.01 per share; 10,000,000 shares authorized; no shares issued and outstanding	0	0
Common stock	3	3
Capital surplus	616	642
Retained earnings	10,041	9,656
Treasury stock, at cost; 155,386,192 and 155,215,143 shares of shares of common stock at March 31, 2020 and December 31, 2019	(9,524)	(9,250)
Accumulated other comprehensive loss	(554)	(439)
Total Moody's shareholders' equity	582	612
Noncontrolling interests	217	219
Total shareholders' equity	799	831
Total liabilities, noncontrolling interests and shareholders' equity	11,306	10,265
Series Common Stock
Shareholders' equity:
Common stock	$ 0	$ 0

CONSOLIDATED BALANCE SHEETS (_2

CONSOLIDATED BALANCE SHEETS (UNAUDITED) (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Accounts receivable, allowances	$ 42	$ 20
Accumulated depreciation, property and equipment	$ 853	$ 839
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
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
Treasury stock, shares (in shares)	155,386,192	155,215,143
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

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash flows from operating activities
Net Income	$ 487	$ 374
Reconciliation of net income to net cash provided by operating activities:
Depreciation and amortization	49	50
Stock-based compensation	37	36
Deferred income taxes	57	14
Loss pursuant to the divestiture of MAKS	9	0
Changes in assets and liabilities:
Accounts receivable	(7)	(8)
Other current assets	(38)	(6)
Other assets	2	(14)
Restructuring liability	(12)	(3)
Accounts payable and accrued liabilities	(186)	(180)
Deferred revenue	64	104
Unrecognized tax benefits and other non-current tax liabilities	(18)	(22)
Other liabilities	(99)	22
Net cash provided by operating activities	345	367
Cash flows from investing activities
Capital additions	(21)	(20)
Purchases of investments	(78)	(38)
Sales and maturities of investments	23	51
Cash paid for acquisitions, net of cash acquired	(696)	0
Net cash used in investing activities	(772)	(7)
Cash flows from financing activities
Issuance of notes	700	0
Repayment of notes	0	(450)
Issuance of commercial paper	789	402
Repayment of commercial paper	(305)	(85)
Proceeds from stock-based compensation plans	16	14
Repurchase of shares related to stock-based compensation	(71)	(51)
Treasury shares	(253)	(448)
Dividends	(105)	(94)
Debt issuance costs	(6)	0
Payment for noncontrolling interest	0	(12)
Cash paid for ASR contract relating to shares retained by Counterparty until final settlement	0	(125)
Net cash provided by (used in) financing activities	765	(849)
Effect of exchange rate changes on cash and cash equivalents	(29)	1
Increase (decrease) in cash and cash equivalents	309	(488)
Cash and cash equivalents, beginning of period	1,832	1,685
Cash and cash equivalents, end of period	$ 2,141	$ 1,197

CONSOLIDATED STATEMENT OF SHARE

CONSOLIDATED STATEMENT OF SHAREHOLDERS' EQUITY (UNAUDITED) - USD ($) shares in Millions, $ in Millions	Total	Common Stock	Capital Surplus	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Loss	Total Moody's Shareholders' Equity	Non- Controlling Interests
Beginning Balance (in shares) at Dec. 31, 2018		342.9			151.6
Beginning Balance at Dec. 31, 2018	$ 656	$ 3	$ 601	$ 8,594	$ (8,313)	$ (426)	$ 459	$ 197
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	374			373			373	1
Dividends	(94)			(94)			(94)
Stock-based compensation	36		36				36
Shares issued for stock-based compensation plans at average cost, net	(60)		(67)		$ 7		(60)
Shares issued for stock-based compensation plans at average cost, net (in shares)					1
Purchase of noncontrolling interest	(12)		(9)				(9)	(3)
Treasury shares repurchased	(448)				$ (448)		(448)
Treasury shares repurchased (in shares)					(2.7)
Cash paid for ASR contract relating to shares retained by Counterparty until final settlement	(125)		(125)				(125)
Currency translation adjustment, net of net investment hedge activity (net of tax of)	(3)					(10)	(10)	7
Net actuarial gains (losses) and prior service costs	1					1	1
Amortization of prior service costs and actuarial losses	0
Ending Balance (in shares) at Mar. 31, 2019		342.9			153.3
Ending Balance at Mar. 31, 2019	325	$ 3	436	8,893	$ (8,754)	(455)	123	202
Beginning Balance (in shares) at Dec. 31, 2019		342.9			155.2
Beginning Balance at Dec. 31, 2019	831	$ 3	642	9,656	$ (9,250)	(439)	612	219
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	487			488			488	(1)
Dividends	(101)			(101)			(101)
Stock-based compensation	37		37				37
Shares issued for stock-based compensation plans at average cost, net	(84)		(63)		$ (21)		(84)
Shares issued for stock-based compensation plans at average cost, net (in shares)					0.9
Treasury shares repurchased	(253)				$ (253)		(253)
Treasury shares repurchased (in shares)					(1.1)
Cash paid for ASR contract relating to shares retained by Counterparty until final settlement	0
Currency translation adjustment, net of net investment hedge activity (net of tax of)	(81)					(80)	(80)	(1)
Net actuarial gains (losses) and prior service costs	(1)					(1)	(1)
Amortization of prior service costs and actuarial losses	1					1	1
Net realized and unrealized gain on cash flow hedges (net of tax)	(35)					(35)	(35)
Ending Balance (in shares) at Mar. 31, 2020		342.9			155.4
Ending Balance at Mar. 31, 2020	$ 799	$ 3	$ 616	$ 10,041	$ (9,524)	$ (554)	$ 582	$ 217

CONSOLIDATED STATEMENT OF SHA_2

CONSOLIDATED STATEMENT OF SHAREHOLDERS' EQUITY (UNAUDITED) (Parenthetical) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Statement of Stockholders' Equity [Abstract]
Dividends declared per share attributable to Moody's common shareholders (in USD per share)	$ 0.56	$ 0.50
Currency translation adjustment, tax	$ 25	$ 7
Amortization of actuarial losses and prior service costs included in net income, tax	1	$ 1
Net realized and unrealized gain on cash flow hedges, tax	$ 12

DESCRIPTION OF BUSINESS AND BAS

DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION	3 Months Ended
	Mar. 31, 2020
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 provider of (i) credit ratings and assessment services; (ii) credit, capital markets and economic research, data and analytical tools; (iii) software solutions that support financial risk management activities; (iv) quantitatively derived credit scores; (v) learning solutions and certification services; and (vi) company information and business intelligence products. Moody’s reports in two reportable segments: MIS and MA. MIS, the credit rating agency, publishes credit ratings and provides assessment services on a wide range of debt obligations and the entities that issue such obligations in markets worldwide. Revenue is primarily derived from the originators and issuers of such transactions who use MIS ratings in the distribution of their debt issues to investors. Additionally, MIS earns revenue from certain non-ratings-related operations which consist primarily of financial instrument pricing services in the Asia-Pacific region, revenue from ICRA’s non-ratings operations and revenue from providing ESG research, data and assessments. The revenue from these operations is included in the MIS Other LOB and is not material to the results of the MIS segment. MA provides financial intelligence and analytical tools to assist businesses in making decisions. MA’s portfolio of solutions consists of specialized research, data, software, and professional services, which are assembled to support the financial analysis and risk management activities of institutional customers worldwide. These interim financial statements have been prepared in accordance with the instructions to Form 10-Q and should be read in conjunction with the Company’s consolidated financial statements and related notes in the Company’s 2019 annual report on Form 10-K filed with the SEC on February 24, 2020. The results of interim periods are not necessarily indicative of results for the full year or any subsequent period. In the opinion of management, all adjustments (including normal recurring accruals) considered necessary for a fair presentation of financial position, results of operations and cash flows at the dates and for the periods presented have been included. The year-end consolidated balance sheet data was derived from audited financial statements, but does not include all disclosures required by accounting principles generally accepted in the United States of America. Certain reclassifications have been made to prior period amounts to conform to the current presentation. Adoption of New Accounting Standards On January 1, 2020, the Company adopted ASU No. 2016-13, “Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments.” The Company has implemented policies and procedures in compliance with the “expected credit loss” impairment model, which included (1) refinement of the grouping of receivables with similar risk characteristics; and (2) processes to identify information that can be used to develop reasonable and supportable forecasts of factors that could affect the collectability of the reported amount of the receivable. As the Company's accounts receivable are short-term in nature, the adoption of this ASU did not have a material impact to the Company's allowance for bad debts or its policies and procedures for determining the allowance. Refer to Note 2 for further information on how the Company determines its reserves for expected credit losses. The Company recorded a $2 million cumulative-effect adjustment to retained earnings to increase its allowance for credit losses upon adoption. On January 1, 2020, the Company adopted ASU No. 2018-15, “Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement that is a Service Contract.” This ASU requires implementation costs incurred by customers in cloud computing arrangements (i.e., hosting arrangements) to be capitalized under the same provisions of authoritative guidance for internal-use software, and amortized over the non-cancellable term of the cloud computing arrangements plus any option renewal periods that are reasonably certain to be exercised by the customer or for which the exercise is controlled by the service provider. The Company will be required to present the amortization of capitalized implementation costs in the same line item in the statement of operations as the fees associated with the hosting service (i.e. operating and SG&A expense) and classify the related payments in the 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). This ASU also requires capitalization of implementation costs in the balance sheet to be consistent with the location of prepayment of fees for the hosting element (i.e. within other current assets or other assets).The Company adopted this ASU prospectively to all implementation costs incurred after the date of adoption and it did not have a material impact on the Company's current financial statements. The future impact to the Company's financial statements will relate to the aforementioned classification of these capitalized costs and related amortization. In March 2020, FASB issued ASU No. 2020-04, "Facilitation of the Effects of Reference Rate Reform on Financial Reporting". The ASU provides temporary optional expedients and exceptions to the U.S. GAAP guidance on contract modifications and hedge accounting to ease the financial reporting burdens related to the expected market transition from the London Interbank Offered Rate (LIBOR) and other interbank offered rates to alternative reference rates. This guidance was effective beginning on March 12, 2020, and the Company may elect to apply the amendments prospectively through December 31, 2022 as the transition from LIBOR is completed. COVID-19 The Company is closely monitoring the impact of the pandemic of the novel strain of coronavirus, COVID-19, on all aspects of its business. Moody’s has transitioned to remote work for all employees globally to help reduce the spread of COVID-19. The Company experienced disruption in certain sectors of its business late in the first quarter of 2020 (including a decline in leveraged finance related issuance volumes) resulting from market volatility associated with the COVID-19 crisis. However, at the date of the filing of this quarterly report on Form 10-Q, the Company is unable to predict either the potential near-term or longer-term impact that the COVID-19 crisis may have on its financial position and operating results due to numerous uncertainties regarding the duration and severity of the crisis. As a result, it is reasonably possible that the Company could experience material impacts including, but not limited to: reductions in revenue and cash flows; additional credit losses related to accounts receivables; asset impairment charges; changes in the effectiveness of certain hedging instruments; and changes in the funded status of defined benefit pension plans. While it is reasonably possible that the COVID-19 crisis will have a material impact on the results of operations and cash flows of the Company in 2020, Moody's believes that it has adequate liquidity to maintain its operations with minimal disruption in the near term and to maintain compliance with its debt covenants. In March, 2020, in order to maximize liquidity and to increase available cash on hand through this period of uncertainty, the Company issued $700 million in 5-year Senior Notes and began drawing on its CP Program as more fully discussed in Note 16. In addition, the Company is reducing discretionary spending, including suspending its share repurchase program until further notice. The Coronavirus Aid, Relief, and Economic Security Act (“CARES Act”) was enacted on March 27, 2020 in the United States. The Company intends on utilizing certain provisions in the CARES Act and other IRS guidance which permit the deferral of certain income and payroll tax remittances.

SUMMARY OF SIGNIFICANT ACCOUNTI

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	3 Months Ended
	Mar. 31, 2020
Accounting Policies [Abstract]
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES On January 1, 2020, the Company adopted the New Credit Losses Accounting Standard as more fully discussed in Note 1. Accordingly, the Company revised its accounts receivable allowances accounting policy to reflect the provisions of the new standard, which is discussed below along with the capitalized software accounting policy, which was also updated this quarter to reflect the New Internal Use Software Accounting Standard. All other significant accounting policies described in the Form 10-K for the year ended December 31, 2019 remain unchanged. Accounts Receivable Allowances On January 1, 2020, the Company adopted ASU No. 2016-13, “Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments” as more fully described in Note 1. As the Company's accounts receivable are short-term in nature, the adoption of this ASU did not have a material impact to the Company's allowance for bad debts or its policies and procedures for determining the allowance. In order to determine an estimate of expected credit losses, receivables are segmented based on similar risk characteristics including historical credit loss patterns and industry or class of customers 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. The reserve rate 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. As of March 31, 2020, Moody's assessment included consideration of the current COVID-19 pandemic and its estimated impact on the Company's accounts receivable allowances. This assessment involved the utilization of significant judgment regarding the expected severity and duration of the market disruption caused by the COVID-19 pandemic, as well as judgment regarding which industries, classes of customers and geographies would be most significantly impacted. During the three months ended March 31, 2020, the Company recorded a provision for expected credited losses of $24 million. The increase in the provision for expected credit losses for the current period was primarily attributable to the aforementioned estimated effects of COVID-19. 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 the Company’s financial systems, website and other systems. Such costs generally consist of direct costs for third-party perpetual license fees, professional services provided by third parties and employee compensation, 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 (i.e., hosting 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. Following the January 1, 2020 adoption of ASU No. 2018-15, “Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement that is a Service Contract" (as further discussed in Note 1), the Company classifies the amortization of capitalized implementation costs in the same line item in the statement of operations as the fees associated with the hosting service (i.e., operating and SG&A expense). In addition, the capitalization of implementation costs is reflected in the balance sheet consistent with the location of prepayment of fees for the hosting element (i.e. within other current assets or other assets). The implementation costs incurred prior to adoption of this ASU have been included within property and equipment, net in the balance sheet with the amortization of such balance included within depreciation and amortization in the statement of operations. 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

REVENUES	3 Months Ended
	Mar. 31, 2020
Revenue from Contract with Customer [Abstract]
REVENUES	REVENUES Revenue by Category The following table presents the Company’s revenues disaggregated by LOB: Three Months Ended 2020 2019 MIS: Corporate finance (CFG) Investment-grade $ 144 $ 97 High-yield 75 57 Bank loans 89 73 Other accounts (1) 145 128 Total CFG 453 355 Structured finance (SFG) Asset-backed securities 22 23 RMBS 27 24 CMBS 17 18 Structured credit 29 35 Other accounts 1 1 Total SFG 96 101 Financial institutions (FIG) Banking 86 80 Insurance 30 29 Managed investments 6 4 Other accounts 3 3 Total FIG 125 116 Public, project and infrastructure finance (PPIF) Public finance / sovereign 57 46 Project and infrastructure 52 47 Total PPIF 109 93 Total ratings revenue 783 665 MIS Other 11 5 Total external revenue 794 670 Intersegment royalty 37 32 Total MIS 831 702 MA: Research, data and analytics (RD&A) 358 308 Enterprise risk solutions (ERS) 138 122 Professional services (PS) (2) — 42 Total external revenue 496 472 Intersegment revenue 2 2 Total MA 498 474 Eliminations (39) (34) Total MCO $ 1,290 $ 1,142 (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. (2) Subsequent to the divestiture of MAKS in 2019, revenue from the MALS reporting unit, which previous to 2020 was reported in the PS LOB, will now be reported as part of the RD&A LOB. Prior periods have not been reclassified as the amounts were not material. The following table presents the Company’s revenues disaggregated by LOB and geographic area: Three Months Ended March 31, 2020 Three Months Ended March 31, 2019 U.S. Non-U.S Total U.S. Non-U.S Total MIS: Corporate finance (CFG) $ 314 $ 139 $ 453 $ 243 $ 112 $ 355 Structured finance (SFG) 61 35 96 62 39 101 Financial institutions (FIG) 60 65 125 46 70 116 Public, project and infrastructure finance (PPIF) 68 41 109 60 33 93 Total ratings revenue 503 280 783 411 254 665 MIS Other — 11 11 — 5 5 Total MIS 503 291 794 411 259 670 MA: Research, data and analytics (RD&A) 158 200 358 135 173 308 Enterprise risk solutions (ERS) 53 85 138 48 74 122 Professional services (PS) (1) — — — 18 24 42 Total MA 211 285 496 201 271 472 Total MCO $ 714 $ 576 $ 1,290 $ 612 $ 530 $ 1,142 (1) Subsequent to the divestiture of MAKS in 2019, the RD&A LOB now includes revenue from Moody's Analytics Learning Solutions (MALS) beginning in the first quarter of 2020. MALS revenue was previously reported as part of the PS LOB and prior year revenue by LOB has not been reclassified as the amounts were not material. The following table presents the Company’s reportable segment revenues disaggregated by segment and geographic region: Three Months Ended 2020 2019 MIS: U.S. $ 503 $ 411 Non-U.S.: EMEA 171 149 Asia-Pacific 81 79 Americas 39 31 Total Non-U.S. 291 259 Total MIS 794 670 MA: U.S. 211 201 Non-U.S.: EMEA 192 184 Asia-Pacific 55 53 Americas 38 34 Total Non-U.S. 285 271 Total MA 496 472 Total MCO $ 1,290 $ 1,142 The following tables summarize the split between transaction and relationship revenue. In the MIS segment, excluding MIS Other, transaction revenue represents the initial rating of a new debt issuance as well as other one-time fees while relationship revenue represents the recurring monitoring fees of a rated debt obligation and/or entities that issue such obligations, as well as revenue from programs such as commercial paper, medium-term notes and shelf registrations. In MIS Other, transaction revenue represents revenue from professional services and outsourcing engagements and relationship revenue represents subscription-based revenues. In the MA segment, relationship revenue represents subscription-based revenues and software maintenance revenue. Transaction revenue in MA represents perpetual software license fees and revenue from software implementation services, risk management advisory projects, training and certification services, and outsourced research and analytical engagements. Three Months Ended March 31, 2020 2019 Transaction Relationship Total Transaction Relationship Total Corporate Finance $ 338 $ 115 $ 453 $ 249 $ 106 $ 355 75 % 25 % 100 % 70 % 30 % 100 % Structured Finance $ 50 $ 46 $ 96 $ 57 $ 44 $ 101 52 % 48 % 100 % 56 % 44 % 100 % Financial Institutions $ 60 $ 65 $ 125 $ 48 $ 68 $ 116 48 % 52 % 100 % 41 % 59 % 100 % Public, Project and Infrastructure Finance $ 69 $ 40 $ 109 $ 55 $ 38 $ 93 63 % 37 % 100 % 59 % 41 % 100 % MIS Other $ 2 $ 9 $ 11 $ 1 $ 4 $ 5 18 % 82 % 100 % 20 % 80 % 100 % Total MIS $ 519 $ 275 $ 794 $ 410 $ 260 $ 670 65 % 35 % 100 % 61 % 39 % 100 % Research, data and analytics $ 18 $ 340 $ 358 $ 5 $ 303 $ 308 5 % 95 % 100 % 2 % 98 % 100 % Enterprise risk solutions $ 32 $ 106 $ 138 $ 24 $ 98 $ 122 23 % 77 % 100 % 20 % 80 % 100 % Professional services $ — $ — $ — $ 42 $ — $ 42 — % — % — % 100 % — % 100 % Total MA $ 50 (1) $ 446 $ 496 $ 71 (1) $ 401 $ 472 10 % 90 % 100 % 15 % 85 % 100 % Total Moody's Corporation $ 569 $ 721 $ 1,290 $ 481 $ 661 $ 1,142 44 % 56 % 100 % 42 % 58 % 100 % (1) Revenue from software implementation services and risk management advisory projects, while classified by management as transactional revenue, is recognized over time under the New Revenue Accounting Standard (please also refer to the following table). The following table presents the timing of revenue recognition: Three Months Ended March 31, 2020 MIS MA Total Revenue recognized at a point in time $ 519 $ 39 $ 558 Revenue recognized over time 275 457 732 Total $ 794 $ 496 $ 1,290 Three Months Ended March 31, 2019 MIS MA Total Revenue recognized at a point in time $ 410 $ 30 $ 440 Revenue recognized over time 260 442 702 Total $ 670 $ 472 $ 1,142 Unbilled receivables, deferred revenue and remaining performance obligations Unbilled receivables At March 31, 2020 and December 31, 2019, accounts receivable, net included $404 million and $346 million, respectively, of unbilled receivables, net related to the MIS segment. 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. In addition, 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. Consequently, at March 31, 2020 and December 31, 2019, accounts receivable, net included $59 million and $53 million, respectively, of unbilled receivables, net related to the MA segment. 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 three months ended March 31, 2020 are as follows: Three Months Ended March 31, 2020 MIS MA Total Balance at January 1, 2020 $ 322 $ 840 $ 1,162 Changes in deferred revenue Revenue recognized that was included in the deferred revenue balance at the beginning of the period (99) (336) (435) Increases due to amounts billable excluding amounts recognized as revenue during the period 161 343 504 Increases due to RDC acquisition during the period — 20 20 Effect of exchange rate changes (5) (24) (29) Total changes in deferred revenue 57 3 60 Balance at March 31, 2020 $ 379 $ 843 $ 1,222 Deferred revenue - current $ 275 $ 838 $ 1,113 Deferred revenue - noncurrent $ 104 $ 5 $ 109 Three Months Ended March 31, 2019 MIS MA Total Balance at January 1, 2019 $ 326 $ 750 $ 1,076 Changes in deferred revenue Revenue recognized that was included in the deferred revenue balance at the beginning of the period (93) (307) (400) Increases due to amounts billable excluding amounts recognized as revenue during the period 155 347 502 Effect of exchange rate changes — 5 5 Total changes in deferred revenue 62 45 107 Balance at March 31, 2019 $ 388 $ 795 $ 1,183 Deferred revenue - current $ 271 $ 791 1,062 Deferred revenue - noncurrent $ 117 $ 4 121 The increase in deferred revenue during both the three months ended March 31, 2020 and 2019 is primarily due to the significant portion of contract renewals that occur during the first quarter within both segments. Remaining performance obligations 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 March 31, 2020, the aggregate amount of the transaction price allocated to remaining performance obligations was approximately $136 million. The Company expects to recognize into revenue approximately 20% of this balance within one year, approximately 50% of this balance between one to five years and the remaining amount thereafter. With respect to the remaining performance obligations for the MIS segment, the Company has applied a practical expedient set forth in ASC Topic 606 permitting the omission from the amounts stated above relating to unsatisfied performance obligations for contracts with an original expected length of one year or less. Remaining performance obligations in the MA segment include both amounts recorded as deferred revenue on the balance sheet as of March 31, 2020 as well as amounts not yet invoiced to customers as of March 31, 2020, largely reflecting future revenue related to signed multi-year arrangements for hosted and installed subscription based products. As of March 31, 2020, the aggregate amount of the transaction price allocated to remaining performance obligations was approximately $2.0 billion. The Company expects to recognize into revenue approximately 70% of this balance within one year, approximately 20% of this balance between one to two years and the remaining amount thereafter.

STOCK-BASED COMPENSATION

STOCK-BASED COMPENSATION	3 Months Ended
	Mar. 31, 2020
Share-based Payment Arrangement, Noncash Expense [Abstract]
STOCK-BASED COMPENSATION	STOCK-BASED COMPENSATION Presented below is a summary of the stock-based compensation cost and associated tax benefit included in the accompanying consolidated statements of operations: Three Months Ended 2020 2019 Stock-based compensation cost $ 37 $ 36 Tax benefit $ 7 $ 8 During the first three months of 2020, the Company granted 0.1 million employee stock options, which had a weighted average grant date fair value of $60.53 per share based on the Black-Scholes option-pricing model. The Company also granted 0.5 million shares of restricted stock in the first three months of 2020, which had a weighted average grant date fair value of $280.42 per share. Both the employee stock options and restricted stock generally vest ratably over four years. Additionally, the Company granted 0.1 million shares of performance-based awards whereby the number of shares that ultimately vest are based on the achievement of certain non-market based performance metrics of the Company over three years. The weighted average grant date fair value of these awards was $273.85 per share. The following weighted average assumptions were used in determining the fair value for options granted in 2020: Expected dividend yield 0.80 % Expected stock volatility 22.43 % Risk-free interest rate 1.45 % Expected holding period 5.7 years Unrecognized stock-based compensation expense at March 31, 2020 was $10 million and $252 million for stock options and unvested restricted stock, respectively, which is expected to be recognized over a weighted average period of 2.6 years and 2.8 years, respectively. Additionally, there was $31 million of unrecognized stock-based compensation expense relating to the aforementioned non-market based performance-based awards, which is expected to be recognized over a weighted average period of 2.3 years. The following tables summarize information relating to stock option exercises and restricted stock vesting: Three Months Ended 2020 2019 Exercise of stock options: Proceeds from stock option exercises $ 13 $ 12 Aggregate intrinsic value $ 46 $ 36 Tax benefit realized upon exercise $ 11 $ 9 Number of shares exercised 0.2 0.3 Vesting of restricted stock: Fair value of shares vested $ 191 $ 147 Tax benefit realized upon vesting $ 44 $ 34 Number of shares vested 0.8 0.8 Vesting of performance-based restricted stock: Fair value of shares vested $ 70 $ 48 Tax benefit realized upon vesting $ 17 $ 12 Number of shares vested 0.3 0.3

INCOME TAXES

INCOME TAXES	3 Months Ended
	Mar. 31, 2020
Income Tax Disclosure [Abstract]
INCOME TAXES	INCOME TAXES Moody’s ETR was 13.7% and 9.2% for the three months ended March 31, 2020 and 2019, respectively. The increase in the ETR is primarily due to favorable IRS regulations issued in the first quarter of 2019 which did not occur in the first quarter of 2020. The Company’s quarterly tax expense differs from the tax computed by applying its estimated annual effective tax rate to this quarter’s pre-tax earnings due to Excess Tax Benefits from stock compensation of $40 million and net reductions to tax positions of $23 million. The Company classifies interest related to UTPs in interest expense, net in its consolidated statements of operations. Penalties, if incurred, would be recognized in other non-operating (expense) income, net. The Company had a decrease in its UTPs of $28 million ($29 million, net of federal tax) during the first quarter of 2020. Moody’s Corporation and subsidiaries are subject to U.S. federal income tax as well as income tax in various state, local and foreign jurisdictions. The Company’s U.S. federal income tax return for 2016 remains open to examination and 2017 and 2018 are currently under examination. The Company’s New York State tax returns for 2011 through 2016 are currently under examination and the Company’s New York City tax return for 2014 is currently under examination. The Company’s U.K. tax return for 2012 is currently under examination and its returns for 2013 through 2018 remain open to examination. For ongoing audits, it is possible the balance of UTPs could decrease in the next twelve months as a result of the settlement of these audits, which might involve the payment of additional taxes, the adjustment of certain deferred taxes and/or the recognition of tax benefits. It is also possible that new issues might be raised by tax authorities which could necessitate increases to the balance of UTPs. As the Company is unable to predict the timing or outcome of these audits, it is therefore 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 the applicable provisions of Topic 740 of the ASC regarding UTPs. The following table shows the amount the Company paid for income taxes: Three Months Ended March 31, 2020 2019 Income taxes paid $ 29 $ 37

WEIGHTED AVERAGE SHARES OUTSTAN

WEIGHTED AVERAGE SHARES OUTSTANDING	3 Months Ended
	Mar. 31, 2020
Earnings Per Share [Abstract]
WEIGHTED AVERAGE SHARES OUTSTANDING	WEIGHTED AVERAGE SHARES OUTSTANDING Below is a reconciliation of basic to diluted shares outstanding: Three Months Ended March 31, 2020 2019 Basic 187.5 190.4 Dilutive effect of shares issuable under stock-based compensation plans 2.1 2.4 Diluted 189.6 192.8 Anti-dilutive options to purchase common shares and restricted stock as well as contingently issuable restricted stock which are excluded from the table above 0.3 0.4 The calculation of diluted EPS requires certain assumptions regarding the use of both cash proceeds and assumed proceeds that would be received upon the exercise of stock options and vesting of restricted stock outstanding as of March 31, 2020 and 2019.

ACCELERATED SHARE REPURCHASE PR

ACCELERATED SHARE REPURCHASE PROGRAM	3 Months Ended
	Mar. 31, 2020
Other Liabilities Disclosure [Abstract]
ACCELERATED SHARE REPURCHASE PROGRAM	ACCELERATED SHARE REPURCHASE PROGRAM On February 20, 2019, the Company entered into an ASR agreement with a financial institution counterparty to repurchase $500 million of its outstanding common stock. The Company paid $500 million to the counterparty and received an initial delivery of 2.2 million shares of its common stock. Final settlement of the ASR agreement was completed on April 26, 2019 and the Company received delivery of an additional 0.6 million shares of the Company’s common stock. In total, the Company repurchased 2.8 million shares of the Company’s common stock during the term of the ASR Agreement, based on the volume-weighted average price (net of discount) of $180.33/share over the duration of the program. The initial share repurchase and final share settlement were recorded as a reduction to shareholders’ equity.

CASH EQUIVALENTS AND INVESTMENT

CASH EQUIVALENTS AND INVESTMENTS	3 Months Ended
	Mar. 31, 2020
Cash and Cash Equivalents [Abstract]
CASH EQUIVALENTS AND INVESTMENTS	CASH EQUIVALENTS AND INVESTMENTS The table below provides additional information on the Company’s cash equivalents and investments: As of March 31, 2020 Balance sheet location Cost Gains/(Losses) Fair Value Cash and cash equivalents Short-term investments Other assets Certificates of deposit and money market deposit accounts (1) $ 1,276 $ — $ 1,276 $ 1,176 $ 87 $ 13 Mutual funds $ 46 $ (7) $ 39 $ — $ 3 $ 36 As of December 31, 2019 Balance sheet location Cost Gains/(Losses) Fair Value Cash and cash equivalents Short-term investments Other assets Certificates of deposit and money market deposit accounts (1) $ 971 $ — $ 971 $ 866 $ 95 $ 10 Mutual funds $ 3 $ — $ 3 $ — $ 3 $ — (1) Consists of time deposits and money market deposit accounts. The remaining contractual maturities for the certificates of deposits classified as short-term investments were one month to 12 months at both March 31, 2020 and December 31, 2019. The remaining contractual maturities for the certificates of deposits classified in other assets are 13 months to 23 months at March 31, 2020 and 13 months to 18 months at December 31, 2019. 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 invested in Corporate-Owned Life Insurance (COLI) in the first quarter of 2020. As of March 31, 2020, the cash surrender value of the COLI was $11 million.

ACQUISITIONS AND OTHER STRATEGI

ACQUISITIONS AND OTHER STRATEGIC INITIATIVES	3 Months Ended
	Mar. 31, 2020
Business Combinations [Abstract]
ACQUISITIONS AND OTHER STRATEGIC INITIATIVES	ACQUISITIONS AND OTHER STRATEGIC INITIATIVES The business combinations described below are accounted for using the acquisition method of accounting whereby assets acquired and liabilities assumed were recognized at fair value on the date of the transaction. Any excess of the purchase price over the fair value of the assets acquired and liabilities assumed was recorded to goodwill. Goodwill typically results through expected synergies from combining operations of an acquiree and an acquirer, anticipated new customer acquisition and products, as well as from intangible assets that do not qualify for separate recognition. RDC On February 13, 2020, the Company acquired 100% of RDC, a provider of anti-money laundering and know-your-customer data and due diligence services. The table below details the total consideration relating to the acquisition: Cash paid at closing $ 700 Additional consideration to be paid to sellers in 2020 (1) 2 Total consideration $ 702 (1) Represents additional consideration due to sellers following finalization of customary post-closing completion adjustments. Shown below is the preliminary purchase price allocation, which summarizes the fair value of the assets and liabilities assumed, at the date of acquisition: (Amounts in millions) Current assets $ 24 Intangible assets: Customer relationships (25 year weighted average life) $ 174 Database (10 year weighted average life) 86 Product technology (4 year weighted average life) 17 Trade name (3 year weighted average life) 3 Total intangible assets (19 year weighted average life) 280 Goodwill 494 Other assets 2 Liabilities: Accounts payable and accrued liabilities $ (5) Deferred revenue (20) Deferred tax liabilities (71) Other liabilities (2) Total liabilities (98) Net assets acquired $ 702 The Company has performed a preliminary valuation analysis of the fair market value of assets and liabilities of the RDC business. The final purchase price allocation will be determined when the Company has completed and fully reviewed the detailed valuations. The final allocation could differ materially from the preliminary allocation. The final allocation may include changes in allocations to acquired intangible assets as well as goodwill and other changes to assets and liabilities including reserves for UTPs and deferred tax liabilities. The estimated useful lives of acquired intangibles assets are also preliminary. Current assets in the table above include acquired cash of $6 million. Additionally, current assets include accounts receivable of approximately $14 million. Goodwill The goodwill recognized as a result of this acquisition includes, among other things, the value of combining the complementary product portfolios of the Company and RDC, which is expected to extend the Company’s reach to new and evolving market segments as well as cost savings synergies, expected new customer acquisitions and products. Goodwill, which has been assigned to the MA segment, is not deductible for tax purposes. RDC will be subsumed into the Bureau van Dijk reporting unit for purposes of the Company’s annual goodwill impairment assessment. Transaction costs Transaction costs directly related to the RDC acquisition were not material. Other Acquisitions and Strategic Initiatives In March 2020, the Company acquired 100% of the shares of RBA International (RBA), a provider of online retail bank training and certifications. The acquisition deepens the capabilities of MALS, a unit of MA that offers online and classroom-based training services, as well as credentialing and certification. RBA revenue is reported in the RD&A LOB. The purchase price for this acquisition was not material and the near term impact to the Company's financial statements is not expected to be material.

DERIVATIVE INSTRUMENTS AND HEDG

DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES	3 Months Ended
	Mar. 31, 2020
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 the aforementioned 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 3-month LIBOR. 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 statement 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 March 31, As of December 31, Floating Interest Rate 2012 Senior Notes due 2022 Pay Floating/Receive Fixed $ 330 $ 330 3-month USD LIBOR 2017 Senior Notes due 2021 Pay Floating/Receive Fixed $ 500 $ 500 3-month USD LIBOR 2017 Senior Notes due 2023 Pay Floating/Receive Fixed $ 250 $ 250 3-month USD LIBOR 2017 Senior Notes due 2028 Pay Floating/Receive Fixed $ 500 $ — 3-month USD LIBOR Total $ 1,580 $ 1,080 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.

GOODWILL AND OTHER ACQUIRED INT

GOODWILL AND OTHER ACQUIRED INTANGIBLE ASSETS	3 Months Ended
	Mar. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
GOODWILL AND OTHER ACQUIRED INTANGIBLE ASSETS	GOODWILL AND OTHER ACQUIRED INTANGIBLE ASSETS The following table summarizes the activity in goodwill for the periods indicated: Three Months Ended March 31, 2020 MIS MA Consolidated Gross goodwill Accumulated impairment charge Net goodwill Gross goodwill Accumulated impairment charge Net goodwill Gross goodwill Accumulated impairment charge Net goodwill Balance at beginning of year $ 315 $ — $ 315 $ 3,419 $ (12) $ 3,407 $ 3,734 $ (12) $ 3,722 Additions/ adjustments (1) — — — 497 — 497 497 — 497 Foreign currency translation adjustments (1) — (1) (96) — (96) (97) — (97) Ending balance $ 314 $ — $ 314 $ 3,820 $ (12) $ 3,808 $ 4,134 $ (12) $ 4,122 Year Ended December 31, 2019 MIS MA Consolidated Gross goodwill Accumulated impairment charge Net goodwill Gross goodwill Accumulated impairment charge Net goodwill Gross goodwill Accumulated impairment charge Net goodwill Balance at beginning of year $ 258 $ — $ 258 $ 3,535 $ (12) $ 3,523 $ 3,793 $ (12) $ 3,781 Additions/ adjustments (2) 53 — 53 61 — 61 114 — 114 Foreign currency translation adjustments 4 — 4 (14) — (14) (10) — (10) Divestiture of MAKS — — — (163) — (163) (163) — (163) Ending balance $ 315 $ — $ 315 $ 3,419 $ (12) $ 3,407 $ 3,734 $ (12) $ 3,722 (1) The 2020 additions/adjustments for the MA segment in the table above relate to the acquisition of RDC and RBA. (2) The 2019 additions/adjustments for the MIS segment in the table above relate to the acquisitions of Vigeo Eiris and Four Twenty Seven. The 2019 additions/adjustments for the MA segment in the table above relate to the acquisition of RiskFirst and ABS Suite. Acquired intangible assets and related amortization consisted of: March 31, December 31, Customer relationships $ 1,460 $ 1,325 Accumulated amortization (244) (235) Net customer relationships 1,216 1,090 Trade secrets 30 30 Accumulated amortization (28) (29) Net trade secrets 2 1 Software/product technology 361 372 Accumulated amortization (133) (131) Net software/product technology 228 241 Trade names 149 150 Accumulated amortization (31) (30) Net trade names 118 120 Other (1) 177 80 Accumulated amortization (32) (34) Net other 145 46 Total acquired intangible assets, net $ 1,709 $ 1,498 (1) Other intangible assets primarily consist of databases, covenants not to compete, and acquired ratings methodologies and models. Amortization expense relating to acquired intangible assets is as follows: Three Months Ended 2020 2019 Amortization expense $ 28 $ 26 Estimated future amortization expense for acquired intangible assets subject to amortization is as follows: Year Ending December 31, 2020 (After March 31,) $ 89 2021 116 2022 115 2023 111 2024 104 Thereafter 1,174 Total estimated future amortization $ 1,709 Matters concerning the ICRA reporting unit On August 29, 2019, the board of directors of ICRA terminated the employment of ICRA's CEO and on September 28, 2019, the shareholders of ICRA voted to remove the former CEO from his position on ICRA's board of directors. ICRA has reported that the Securities and Exchange Board of India (SEBI) issued an adjudication order dated December 26, 2019 imposing a penalty of INR 25 lakh (approximately $35,000) on ICRA in connection with credit ratings assigned to one of ICRA’s customers and the customer’s subsidiaries. ICRA has further reported that: (i) it is appealing that order; and (ii) it has received a related "show cause" notice from SEBI asking ICRA to demonstrate why the penalty imposed should not be increased. In addition, ICRA has disclosed that it is addressing anonymous allegations that were forwarded to ICRA by SEBI, as well as certain additional allegations made during the course of the ongoing internal examination into those anonymous allegations. As of the date of this quarterly report on Form 10-Q, the Company is unable to estimate the financial impact, if any, that may result from a potential unfavorable conclusion of these matters or any other ICRA inquiry. An unfavorable resolution of such matters may negatively impact ICRA’s future operating results, which could result in an impairment of goodwill and amortizable intangible assets in future quarters. During the first quarter of 2020, the average market capitalization of ICRA declined to a level that resulted in a significant decline in headroom (amount by which the fair value of a reporting unit exceeds its carrying value) from amounts reported in the Company's Form 10-K for the year ended December 31, 2019. While the current fair value of the ICRA reporting unit results in no impairment of goodwill at March 31, 2020, further declines in ICRA's average market capitalization could result in impairment in future quarters.

FAIR VALUE

FAIR VALUE	3 Months Ended
	Mar. 31, 2020
Fair Value Disclosures [Abstract]
FAIR VALUE	FAIR VALUE The table below presents information about items that are carried at fair value at March 31, 2020 and December 31, 2019: Fair value Measurement as of March 31, 2020 Description Balance Level 1 Level 2 Assets: Derivatives (1) $ 259 $ — $ 259 Mutual funds 39 39 — Total $ 298 $ 39 $ 259 Liabilities: Derivatives (1) $ 58 $ — $ 58 Total $ 58 $ — $ 58 Fair value Measurement as of December 31, 2019 Description Balance Level 1 Level 2 Assets: Derivatives (1) $ 92 $ — $ 92 Mutual funds 3 3 — Total $ 95 $ 3 $ 92 (1) Represents FX forwards on certain assets and liabilities as well as interest rate swaps, cross-currency swaps and forward contracts as more fully described in Note 10 to the condensed consolidated financial statements. The following are descriptions of the methodologies utilized by the Company to estimate the fair value of its derivative contracts, mutual funds and money market mutual funds: Derivatives: In determining the fair value of the derivative contracts in the table 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. Mutual funds and money market mutual funds: The mutual funds in the table above are deemed to be equity securities with readily determinable fair values with changes in the 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 AND STATEME

OTHER BALANCE SHEET AND STATEMENT OF OPERATIONS INFORMATION	3 Months Ended
	Mar. 31, 2020
Other Balance Sheet And Statement Of Operations Information [Abstract]
OTHER BALANCE SHEET AND STATEMENT OF OPERATIONS INFORMATION	OTHER BALANCE SHEET AND STATEMENT OF OPERATIONS INFORMATION The following tables contain additional detail related to certain balance sheet captions: March 31, 2020 December 31, 2019 Other current assets: Prepaid taxes $ 98 $ 79 Prepaid expenses 80 71 Capitalized costs to obtain and fulfill sales contracts 85 91 Other 87 89 Total other current assets $ 350 $ 330 Other assets: Investments in non-consolidated affiliates $ 121 $ 117 Deposits for real-estate leases 14 13 Indemnification assets related to acquisitions 16 16 Mutual funds and fixed deposits 49 10 Company owned life insurance (at contract value) 11 — Costs to obtain sales contracts 117 119 Cross currency and interest rate swaps 230 83 Other 36 31 Total other assets $ 594 $ 389 March 31, 2020 December 31, 2019 Accounts payable and accrued liabilities: Salaries and benefits $ 160 $ 152 Incentive compensation 37 208 Customer credits, advanced payments and advanced billings 41 28 Dividends 3 7 Professional service fees 59 43 Interest accrued on debt 35 63 Accounts payable 26 38 Income taxes 91 73 Pension and other retirement employee benefits 7 7 Accrued royalties 20 25 Foreign exchange forwards on certain assets and liabilities 10 — Restructuring liability 9 21 Treasury lock forward contracts 47 — Other 119 108 Total accounts payable and accrued liabilities $ 664 $ 773 Other liabilities: Pension and other retirement employee benefits $ 196 $ 299 Interest accrued on UTPs 89 82 MAKS indemnification provisions 41 43 Income tax liability - non-current portion 51 51 Cross currency and interest rate swaps 1 — Restructuring liability 3 3 Other 22 26 Total other liabilities $ 403 $ 504 Loss pursuant to the Divestiture of MAKS: The $9 million loss in the first quarter of 2020 relates to customary post-closing completion adjustments pursuant to the fourth quarter 2019 divestiture of MAKS. Other Non-Operating Income (Expense): The following table summarizes the components of other non-operating income (expense): Three Months Ended March 31, 2020 2019 FX gain (loss) $ 13 $ (6) Net periodic pension costs - other components 3 4 Income from investments in non-consolidated affiliates (3) 1 Other (1) 3 Total $ 12 $ 2

COMPREHENSIVE INCOME AND ACCUMU

COMPREHENSIVE INCOME AND ACCUMULATED OTHER COMPREHENSIVE INCOME	3 Months Ended
	Mar. 31, 2020
Equity [Abstract]
COMPREHENSIVE INCOME AND ACCUMULATED OTHER COMPREHENSIVE INCOME	COMPREHENSIVE INCOME AND ACCUMULATED OTHER COMPREHENSIVE INCOME The following table provides details about the reclassifications out of AOCI: Three Months Ended March 31, Location in the consolidated statement of operations Losses on cash flow hedges 2020 2019 Interest rate contract $ (1) $ — Other non-operating income, net Income tax effect of item above — — Provision for income taxes Total net losses on cash flow hedges (1) — Pension and other retirement benefits Amortization of actuarial losses and prior service costs included in net income (1) (1) Operating expense Amortization of actuarial losses and prior service costs included in net income (1) — SG&A expense Total before income taxes (2) (1) Income tax effect of item above 1 1 Provision for income taxes Total pension and other retirement benefits (1) — Total net losses included in Net Income attributable to reclassifications out of AOCI $ (2) $ — The following tables show changes in AOCI by component (net of tax): Three Months Ended March 31, 2020 Pension and Other Retirement Benefits Cash Flow Hedges Foreign Currency Translation Adjustments Net Investment Hedges Total Balance December 31, 2019 $ (92) $ — $ (401) $ 54 $ (439) Other comprehensive income/(loss) before reclassifications (1) (36) (169) 89 (117) Amounts reclassified from AOCI 1 1 — — 2 Other comprehensive income/(loss) — (35) (169) 89 (115) Balance March 31, 2020 $ (92) $ (35) $ (570) $ 143 $ (554)

PENSION AND OTHER RETIREMENT BE

PENSION AND OTHER RETIREMENT BENEFITS	3 Months Ended
	Mar. 31, 2020
Retirement Benefits [Abstract]
PENSION AND OTHER RETIREMENT BENEFITS	PENSION AND OTHER RETIREMENT BENEFITS Moody’s maintains funded and unfunded noncontributory DBPPs. The U.S. plans provide defined benefits using a cash balance formula based on years of service and career average salary for its employees 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”. The non-U.S. defined benefit pension plans are immaterial. Effective January 1, 2008, the Company no longer offers DBPPs to U.S. employees hired or rehired on or after January 1, 2008. New U.S. employees will instead receive a retirement contribution of similar benefit value under the Company’s Profit Participation Plan. Current participants of the Company’s DBPPs continue to accrue benefits based on existing plan formulas. The components of net periodic benefit expense related to the Retirement Plans are as follows: Three Months Ended March 31, Pension Plans Other Retirement Plans 2020 2019 2020 2019 Components of net periodic expense Service cost $ 5 $ 4 $ 1 $ 1 Interest cost 4 5 — — Expected return on plan assets (5) (5) — — Amortization of net actuarial loss from earlier periods 2 1 — — Amortization of net prior service costs from earlier periods — — — — Net periodic expense $ 6 $ 5 $ 1 $ 1 The Company made a contribution of $99 million to its funded pension plan as well as payments of $3 million related to its unfunded U.S. DBPPs during the three months ended March 31, 2020. Additionally, the Company anticipates making payments of $3 million and $1 million to its unfunded U.S. DBPPs and U.S. other retirement plans, respectively, during the remainder of 2020.

INDEBTEDNESS

INDEBTEDNESS	3 Months Ended
	Mar. 31, 2020
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 the 2012 Senior Notes, the 2017 Senior Notes due 2021, the 2017 Senior Notes due 2023, and the 2017 Senior Notes due 2028 which are 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: March 31, 2020 Notes Payable: Principal Amount Fair Value of Interest Rate Swaps (1) Unamortized (Discount) Premium Unamortized Debt Issuance Costs Carrying Value 4.50% 2012 Senior Notes, due 2022 $ 500 $ 18 $ (1) $ (1) $ 516 4.875% 2013 Senior Notes, due 2024 500 — (1) (1) 498 5.25% 2014 Senior Notes (30-Year), due 2044 600 — 3 (5) 598 1.75% 2015 Senior Notes, due 2027 549 — — (3) 546 2.75% 2017 Senior Notes, due 2021 500 21 — (1) 520 2.625% 2017 Senior Notes, due 2023 500 15 (1) (2) 512 3.25% 2017 Senior Notes, due 2028 500 31 (4) (3) 524 3.25% 2018 Senior Notes, due 2021 300 — — (1) 299 4.25% 2018 Senior Notes, due 2029 400 — (3) (3) 394 4.875% 2018 Senior Notes, due 2048 400 — (7) (4) 389 0.950% 2019 Senior Notes, due 2030 823 — (3) (6) 814 3.75% 2020 Senior Note, due 2025 700 — (1) (6) 693 Commercial Paper 487 — (2) — 485 Total debt $ 6,759 $ 85 $ (20) $ (36) $ 6,788 Current portion (485) Total long-term debt $ 6,303 December 31, 2019 Notes Payable: Principal Amount Fair Value of Interest Rate Swaps (1) Unamortized (Discount) Premium Unamortized Debt Issuance Costs Carrying Value 4.50% 2012 Senior Notes, due 2022 $ 500 $ 9 $ (1) $ (1) $ 507 4.875% 2013 Senior Notes, due 2024 500 — (1) (2) 497 5.25% 2014 Senior Notes (30-Year), due 2044 600 — 4 (5) 599 1.75% 2015 Senior Notes, due 2027 561 — — (3) 558 2.75% 2017 Senior Notes, due 2021 500 11 (1) (2) 508 2.625% 2017 Senior Notes, due 2023 500 7 (1) (2) 504 3.25% 2017 Senior Notes, due 2028 500 — (4) (3) 493 3.25% 2018 Senior Notes, due 2021 300 — — (1) 299 4.25% 2018 Senior Notes, due 2029 400 — (3) (3) 394 4.875% 2018 Senior Notes, due 2048 400 — (7) (4) 389 0.950% 2019 Senior Notes, due 2030 842 — (3) (6) 833 Total long-term debt $ 5,603 $ 27 $ (17) $ (32) $ 5,581 (1) The Company has entered into interest rate swaps on the 2012 Senior Notes, the 2017 Senior Notes due 2021, the 2017 Senior Notes due 2023 and the 2017 Senior Notes due 2028 which are more fully discussed in Note 10 above. These amounts represent the cumulative amount of fair value hedging adjustments included in the carrying amount of the hedged debt. Commercial Paper As of March 31, 2020, the Company has CP borrowings outstanding of $485 million with a weighted average maturity date at the time of issuance of 77 days. At March 31, 2020, the weighted average remaining maturity and interest rate on CP outstanding was 58 days and 2.38% respectively. Notes Payable On March 25, 2020, the Company issued $700 million aggregate principal amount of senior unsecured rate notes in a public offering. The 2020 Senior Notes (5-year) bear interest at an annual fixed rate of 3.75% and mature on March 24, 2025. At March 31, 2020, the Company was in compliance with all covenants contained within all of the debt agreements. All 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 March 31, 2020, there were no such cross defaults. The repayment schedule for the Company’s borrowings is as follows: Year Ending December 31, 2012 Senior Notes due 2022 2013 Senior Notes due 2024 2014 Senior Notes (30-Year) due 2044 2015 Senior Notes due 2027 2017 Senior Notes due 2021 2017 Senior Notes due 2023 2017 Senior Notes due 2028 2018 Senior Notes due 2021 2018 Senior Notes due 2029 2018 Senior Notes due 2048 2019 Senior Notes due 2030 2020 Senior Note due 2025 Commercial Paper Total 2020 (After March 31,) $ — $ — $ — $ — $ — $ — $ — $ — $ — $ — $ — $ — $ 487 $ 487 2021 — — — — 500 — — 300 — — — — — $ 800 2022 500 — — — — — — — — — — — — $ 500 2023 — — — — — 500 — — — — — — — $ 500 2024 — 500 — — — — — — — — — — — $ 500 Thereafter — — 600 549 — — 500 — 400 400 823 700 — $ 3,972 Total $ 500 $ 500 $ 600 $ 549 $ 500 $ 500 $ 500 $ 300 $ 400 $ 400 $ 823 $ 700 $ 487 $ 6,759 Interest expense, net The following table summarizes the components of interest as presented in the consolidated statements of operations: Three Months Ended 2020 2019 Income $ 4 $ 5 Expense on borrowings (31) (46) UTPs and other tax related liabilities (8) (6) Net periodic pension costs - interest component (5) (5) Total $ (40) $ (52) The following table shows the cash paid for interest: Three Months Ended 2020 2019 Interest paid $ 49 $ 73 The fair value and carrying value of the Company’s debt as of March 31, 2020 and December 31, 2019 are as follows: March 31, 2020 December 31, 2019 Carrying Amount Estimated Fair Value Carrying Amount Estimated Fair Value 4.50% 2012 Senior Notes, due 2022 $ 516 $ 521 $ 507 $ 531 4.875% 2013 Senior Notes, due 2024 498 536 497 551 5.25% 2014 Senior Notes (30-Year), due 2044 598 738 599 757 1.75% 2015 Senior Notes, due 2027 546 577 558 604 2.75% 2017 Senior Notes, due 2021 520 497 508 507 2.625% 2017 Senior Notes, due 2023 512 496 504 507 3.25% 2017 Senior Notes, due 2028 524 509 493 523 3.25% 2018 Senior Notes, due 2021 299 301 299 306 4.25% 2018 Senior Notes, due 2029 394 445 394 453 4.875% 2018 Senior Notes, due 2048 389 463 389 492 0.950% 2019 Senior Notes, due 2030 814 769 833 847 3.75% 2020 Senior Note, due 2025 693 732 — — Total $ 6,303 $ 6,584 $ 5,581 $ 6,078 The fair value of the Company’s long-term debt is estimated based on quoted market prices for similar instruments. Accordingly, the inputs used to estimate the fair value of the Company’s long-term debt are classified as Level 2 inputs within the fair value hierarchy.

LEASES

LEASES	3 Months Ended
	Mar. 31, 2020
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: Three Months Ended March 31, 2020 Three Months Ended Operating lease cost $ 24 $ 25 Sublease Income (1) — Variable lease cost 5 4 Total lease cost $ 28 $ 29 The following tables present other information related to the Company’s operating leases: Three Months Ended Three Months Ended Cash paid for amounts included in the measurement of operating lease liabilities $ 26 $ 26 Right-of-use assets obtained in exchange for new operating lease liabilities $ 9 $ 9 March 31, 2020 March 31, 2019 Weighted-average remaining lease term 6.7 years 7.3 years Weighted-average discount rate applied to operating leases 3.6 % 3.6 % The following table presents a maturity analysis of the future minimum lease payments included within the Company’s operating lease liabilities at March 31, 2020: Year Ending December 31, Operating Leases 2020 (After March 31) $ 80 2021 103 2022 90 2023 84 2024 78 After 2024 186 Total lease payments (undiscounted) 621 Less: Interest 69 Present value of lease liabilities: $ 552 Lease liabilities - current $ 89 Lease liabilities - noncurrent $ 463

CONTINGENCIES

CONTINGENCIES	3 Months Ended
	Mar. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
CONTINGENCIES	CONTINGENCIES Given the nature of their 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. Moody’s also is subject to ongoing tax audits as addressed in Note 5 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	3 Months Ended
	Mar. 31, 2020
Segment Reporting [Abstract]
SEGMENT INFORMATION	SEGMENT INFORMATION The Company is organized into two operating segments: MIS and MA and accordingly, the Company reports in two reportable segments: MIS and MA. The MIS segment consists of five LOBs. The CFG, SFG, FIG and PPIF 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 ESG research, data and assessments. The MA segment develops a wide range of products and services that support the risk management activities of institutional participants in global financial markets. Beginning i n the first quarter of 2020, t he MA segment now consists of two LOBs - RD&A and ERS. Subsequent to the divestiture of MAKS in the fourth quarter of 2019, the MALS business, which was historically part of the PS LOB through December 31, 2019, was reclassified to the RD&A LOB. Prior year revenue by LOB has not been reclassified as the amounts relating to the MALS business were not material. Revenue for MIS and expenses for MA include an intersegment royalty charged to MA for the rights to use and distribute content, data and products developed by MIS. The royalty rate charged by MIS approximates the fair value of the aforementioned content, data and products and is generally based on comparable market transactions. Also, 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. These fees charged by MA are generally equal to the costs incurred by MA to produce these products and services. 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 allocated to each segment based on the segment’s share of full-year 2018 actual revenue which comprises a “Baseline Pool” that will remain fixed over time. In subsequent periods, incremental overhead costs (or reductions thereof) will be allocated to each segment based on the prevailing shares of total revenue represented by each segment. “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. Consequently, it is not practical to show assets by reportable segment. Financial Information by Segment The table below shows revenue, Adjusted Operating Income and operating income by reportable segment. Adjusted Operating Income is a financial metric utilized by the Company’s chief operating decision maker to assess the profitability of each reportable segment. Refer to Note 3 for further details on the components of the Company’s revenue. Three Months Ended March 31, 2020 2019 MIS MA Eliminations Consolidated MIS MA Eliminations Consolidated Revenue $ 831 $ 498 $ (39) $ 1,290 $ 702 $ 474 $ (34) $ 1,142 Total Expenses 343 394 (39) 698 336 378 (34) 680 Operating income 488 104 — 592 366 96 — 462 Add: Restructuring (1) — — (1) 3 3 — 6 Depreciation and amortization 16 33 — 49 17 33 — 50 Acquisition-Related Expenses — — — — — 1 — 1 Loss pursuant to the divestiture of MAKS — 9 — 9 — — — — Adjusted Operating Income $ 503 $ 146 $ — $ 649 $ 386 $ 133 $ — $ 519 Consolidated Revenue Information by Geographic Area Consolidated Revenue Information by Geographic Area: Three Months Ended March 31, 2020 2019 United States $ 714 $ 612 Non-U.S.: EMEA 363 333 Asia-Pacific 136 132 Americas 77 65 Total Non-U.S. 576 530 Total $ 1,290 $ 1,142

RECENTLY ISSUED ACCOUNTING STAN

RECENTLY ISSUED ACCOUNTING STANDARDS	3 Months Ended
	Mar. 31, 2020
Accounting Changes and Error Corrections [Abstract]
RECENTLY ISSUED ACCOUNTING STANDARDS	RECENTLY ISSUED ACCOUNTING STANDARDS In August 2018, the FASB issued ASU No. 2018-14, “Compensation—Retirement Benefits—Defined Benefit Plans—General (Subtopic 715- 20): Disclosure Framework—Changes to the Disclosure Requirements for Defined Benefit Plans”. This ASU eliminates requirements for certain disclosures and requires additional disclosures under defined benefit pension plans and other postretirement plans. The ASU is effective for all entities for fiscal years beginning after December 15, 2020 on a retrospective basis to all periods presented, with early adoption permitted. The Company will comply with the new disclosure requirements set forth in this ASU upon adoption. In April 2019, the FASB issued ASU No. 2019-04, “Codification Improvements to Topic 326, Financial Instruments—Credit Losses, Topic 815, Derivatives and Hedging, and Topic 825 Financial Instruments”. This ASU clarifies and improves guidance related to the recently issued standards updates on credit losses, hedging, and recognition and measurement of financial instruments. This ASU is effective for fiscal years beginning after December 15, 2020, with early adoption permitted. The Company does not anticipate that the adoption of this ASU will have a significant impact on its consolidated financial statements. In December 2019, the FASB issued ASU No. 2019-12, "Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes". This ASU simplifies the accounting for income taxes by eliminating certain exceptions to the general principles in Topic 740, Income Taxes, and clarifies certain aspects of the existing guidance to promote consistency among reporting entities. Most amendments within this ASU are required to be applied on a prospective basis, while certain amendments must be applied on a retrospective or modified retrospective basis. This ASU is effective for fiscal years beginning after December 15, 2020, with early adoption permitted. The Company is currently evaluating the impact of this ASU on its financial statements.

SUBSEQUENT EVENTS

SUBSEQUENT EVENTS	3 Months Ended
	Mar. 31, 2020
Subsequent Events [Abstract]
SUBSEQUENT EVENTS	SUBSEQUENT EVENTOn April 20, 2020, the Board approved the declaration of a quarterly dividend of $0.56 per share of Moody’s common stock, payable on June 10, 2020 to shareholders of record at the close of business on May 20, 2020.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2020
Accounting Policies [Abstract]
Accounts Receivable Allowances	Accounts Receivable Allowances On January 1, 2020, the Company adopted ASU No. 2016-13, “Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments” as more fully described in Note 1. As the Company's accounts receivable are short-term in nature, the adoption of this ASU did not have a material impact to the Company's allowance for bad debts or its policies and procedures for determining the allowance. In order to determine an estimate of expected credit losses, receivables are segmented based on similar risk characteristics including historical credit loss patterns and industry or class of customers 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. The reserve rate 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.
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 the Company’s financial systems, website and other systems. Such costs generally consist of direct costs for third-party perpetual license fees, professional services provided by third parties and employee compensation, 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.
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)	3 Months Ended
	Mar. 31, 2020
Revenue from Contract with Customer [Abstract]
Disaggregation of Revenue	The following table presents the Company’s revenues disaggregated by LOB: Three Months Ended 2020 2019 MIS: Corporate finance (CFG) Investment-grade $ 144 $ 97 High-yield 75 57 Bank loans 89 73 Other accounts (1) 145 128 Total CFG 453 355 Structured finance (SFG) Asset-backed securities 22 23 RMBS 27 24 CMBS 17 18 Structured credit 29 35 Other accounts 1 1 Total SFG 96 101 Financial institutions (FIG) Banking 86 80 Insurance 30 29 Managed investments 6 4 Other accounts 3 3 Total FIG 125 116 Public, project and infrastructure finance (PPIF) Public finance / sovereign 57 46 Project and infrastructure 52 47 Total PPIF 109 93 Total ratings revenue 783 665 MIS Other 11 5 Total external revenue 794 670 Intersegment royalty 37 32 Total MIS 831 702 MA: Research, data and analytics (RD&A) 358 308 Enterprise risk solutions (ERS) 138 122 Professional services (PS) (2) — 42 Total external revenue 496 472 Intersegment revenue 2 2 Total MA 498 474 Eliminations (39) (34) Total MCO $ 1,290 $ 1,142 (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. (2) Subsequent to the divestiture of MAKS in 2019, revenue from the MALS reporting unit, which previous to 2020 was reported in the PS LOB, will now be reported as part of the RD&A LOB. Prior periods have not been reclassified as the amounts were not material. The following table presents the Company’s revenues disaggregated by LOB and geographic area: Three Months Ended March 31, 2020 Three Months Ended March 31, 2019 U.S. Non-U.S Total U.S. Non-U.S Total MIS: Corporate finance (CFG) $ 314 $ 139 $ 453 $ 243 $ 112 $ 355 Structured finance (SFG) 61 35 96 62 39 101 Financial institutions (FIG) 60 65 125 46 70 116 Public, project and infrastructure finance (PPIF) 68 41 109 60 33 93 Total ratings revenue 503 280 783 411 254 665 MIS Other — 11 11 — 5 5 Total MIS 503 291 794 411 259 670 MA: Research, data and analytics (RD&A) 158 200 358 135 173 308 Enterprise risk solutions (ERS) 53 85 138 48 74 122 Professional services (PS) (1) — — — 18 24 42 Total MA 211 285 496 201 271 472 Total MCO $ 714 $ 576 $ 1,290 $ 612 $ 530 $ 1,142 (1) Subsequent to the divestiture of MAKS in 2019, the RD&A LOB now includes revenue from Moody's Analytics Learning Solutions (MALS) beginning in the first quarter of 2020. MALS revenue was previously reported as part of the PS LOB and prior year revenue by LOB has not been reclassified as the amounts were not material. The following tables summarize the split between transaction and relationship revenue. In the MIS segment, excluding MIS Other, transaction revenue represents the initial rating of a new debt issuance as well as other one-time fees while relationship revenue represents the recurring monitoring fees of a rated debt obligation and/or entities that issue such obligations, as well as revenue from programs such as commercial paper, medium-term notes and shelf registrations. In MIS Other, transaction revenue represents revenue from professional services and outsourcing engagements and relationship revenue represents subscription-based revenues. In the MA segment, relationship revenue represents subscription-based revenues and software maintenance revenue. Transaction revenue in MA represents perpetual software license fees and revenue from software implementation services, risk management advisory projects, training and certification services, and outsourced research and analytical engagements. Three Months Ended March 31, 2020 2019 Transaction Relationship Total Transaction Relationship Total Corporate Finance $ 338 $ 115 $ 453 $ 249 $ 106 $ 355 75 % 25 % 100 % 70 % 30 % 100 % Structured Finance $ 50 $ 46 $ 96 $ 57 $ 44 $ 101 52 % 48 % 100 % 56 % 44 % 100 % Financial Institutions $ 60 $ 65 $ 125 $ 48 $ 68 $ 116 48 % 52 % 100 % 41 % 59 % 100 % Public, Project and Infrastructure Finance $ 69 $ 40 $ 109 $ 55 $ 38 $ 93 63 % 37 % 100 % 59 % 41 % 100 % MIS Other $ 2 $ 9 $ 11 $ 1 $ 4 $ 5 18 % 82 % 100 % 20 % 80 % 100 % Total MIS $ 519 $ 275 $ 794 $ 410 $ 260 $ 670 65 % 35 % 100 % 61 % 39 % 100 % Research, data and analytics $ 18 $ 340 $ 358 $ 5 $ 303 $ 308 5 % 95 % 100 % 2 % 98 % 100 % Enterprise risk solutions $ 32 $ 106 $ 138 $ 24 $ 98 $ 122 23 % 77 % 100 % 20 % 80 % 100 % Professional services $ — $ — $ — $ 42 $ — $ 42 — % — % — % 100 % — % 100 % Total MA $ 50 (1) $ 446 $ 496 $ 71 (1) $ 401 $ 472 10 % 90 % 100 % 15 % 85 % 100 % Total Moody's Corporation $ 569 $ 721 $ 1,290 $ 481 $ 661 $ 1,142 44 % 56 % 100 % 42 % 58 % 100 % (1) Revenue from software implementation services and risk management advisory projects, while classified by management as transactional revenue, is recognized over time under the New Revenue Accounting Standard (please also refer to the following table). The following table presents the timing of revenue recognition: Three Months Ended March 31, 2020 MIS MA Total Revenue recognized at a point in time $ 519 $ 39 $ 558 Revenue recognized over time 275 457 732 Total $ 794 $ 496 $ 1,290 Three Months Ended March 31, 2019 MIS MA Total Revenue recognized at a point in time $ 410 $ 30 $ 440 Revenue recognized over time 260 442 702 Total $ 670 $ 472 $ 1,142
Company's Reportable Segment Revenues Disaggregated by Segment and Geographic Region	The following table presents the Company’s reportable segment revenues disaggregated by segment and geographic region: Three Months Ended 2020 2019 MIS: U.S. $ 503 $ 411 Non-U.S.: EMEA 171 149 Asia-Pacific 81 79 Americas 39 31 Total Non-U.S. 291 259 Total MIS 794 670 MA: U.S. 211 201 Non-U.S.: EMEA 192 184 Asia-Pacific 55 53 Americas 38 34 Total Non-U.S. 285 271 Total MA 496 472 Total MCO $ 1,290 $ 1,142
Schedule of Changes in the Deferred Revenue Balances	Significant changes in the deferred revenue balances during the three months ended March 31, 2020 are as follows: Three Months Ended March 31, 2020 MIS MA Total Balance at January 1, 2020 $ 322 $ 840 $ 1,162 Changes in deferred revenue Revenue recognized that was included in the deferred revenue balance at the beginning of the period (99) (336) (435) Increases due to amounts billable excluding amounts recognized as revenue during the period 161 343 504 Increases due to RDC acquisition during the period — 20 20 Effect of exchange rate changes (5) (24) (29) Total changes in deferred revenue 57 3 60 Balance at March 31, 2020 $ 379 $ 843 $ 1,222 Deferred revenue - current $ 275 $ 838 $ 1,113 Deferred revenue - noncurrent $ 104 $ 5 $ 109 Three Months Ended March 31, 2019 MIS MA Total Balance at January 1, 2019 $ 326 $ 750 $ 1,076 Changes in deferred revenue Revenue recognized that was included in the deferred revenue balance at the beginning of the period (93) (307) (400) Increases due to amounts billable excluding amounts recognized as revenue during the period 155 347 502 Effect of exchange rate changes — 5 5 Total changes in deferred revenue 62 45 107 Balance at March 31, 2019 $ 388 $ 795 $ 1,183 Deferred revenue - current $ 271 $ 791 1,062 Deferred revenue - noncurrent $ 117 $ 4 121

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	3 Months Ended
	Mar. 31, 2020
Share-based Payment Arrangement, Noncash Expense [Abstract]
Stock-Based Compensation Cost and Associated Tax Benefit	Presented below is a summary of the stock-based compensation cost and associated tax benefit included in the accompanying consolidated statements of operations: Three Months Ended 2020 2019 Stock-based compensation cost $ 37 $ 36 Tax benefit $ 7 $ 8
Weighted Average Assumptions used in Determining Fair Value for Options Granted	The following weighted average assumptions were used in determining the fair value for options granted in 2020: Expected dividend yield 0.80 % Expected stock volatility 22.43 % Risk-free interest rate 1.45 % Expected holding period 5.7 years
Stock Option Exercises and Restricted Stock Vesting	The following tables summarize information relating to stock option exercises and restricted stock vesting: Three Months Ended 2020 2019 Exercise of stock options: Proceeds from stock option exercises $ 13 $ 12 Aggregate intrinsic value $ 46 $ 36 Tax benefit realized upon exercise $ 11 $ 9 Number of shares exercised 0.2 0.3 Vesting of restricted stock: Fair value of shares vested $ 191 $ 147 Tax benefit realized upon vesting $ 44 $ 34 Number of shares vested 0.8 0.8 Vesting of performance-based restricted stock: Fair value of shares vested $ 70 $ 48 Tax benefit realized upon vesting $ 17 $ 12 Number of shares vested 0.3 0.3

Income Taxes (Tables)

Income Taxes (Tables)	3 Months Ended
	Mar. 31, 2020
Income Tax Disclosure [Abstract]
Income Taxes Paid	The following table shows the amount the Company paid for income taxes: Three Months Ended March 31, 2020 2019 Income taxes paid $ 29 $ 37

Weighted Average Shares Outst_2

Weighted Average Shares Outstanding (Tables)	3 Months Ended
	Mar. 31, 2020
Earnings Per Share [Abstract]
Reconciliation of Basic to Diluted Shares Outstanding	Below is a reconciliation of basic to diluted shares outstanding: Three Months Ended March 31, 2020 2019 Basic 187.5 190.4 Dilutive effect of shares issuable under stock-based compensation plans 2.1 2.4 Diluted 189.6 192.8 Anti-dilutive options to purchase common shares and restricted stock as well as contingently issuable restricted stock which are excluded from the table above 0.3 0.4

CASH EQUIVALENTS AND INVESTME_2

CASH EQUIVALENTS AND INVESTMENTS (Tables)	3 Months Ended
	Mar. 31, 2020
Cash and Cash Equivalents [Abstract]
Schedule of Cash and Cash Equivalents and Investments	The table below provides additional information on the Company’s cash equivalents and investments: As of March 31, 2020 Balance sheet location Cost Gains/(Losses) Fair Value Cash and cash equivalents Short-term investments Other assets Certificates of deposit and money market deposit accounts (1) $ 1,276 $ — $ 1,276 $ 1,176 $ 87 $ 13 Mutual funds $ 46 $ (7) $ 39 $ — $ 3 $ 36 As of December 31, 2019 Balance sheet location Cost Gains/(Losses) Fair Value Cash and cash equivalents Short-term investments Other assets Certificates of deposit and money market deposit accounts (1) $ 971 $ — $ 971 $ 866 $ 95 $ 10 Mutual funds $ 3 $ — $ 3 $ — $ 3 $ — (1) Consists of time deposits and money market deposit accounts. The remaining contractual maturities for the certificates of deposits classified as short-term investments were one month to 12 months at both March 31, 2020 and December 31, 2019. The remaining contractual maturities for the certificates of deposits classified in other assets are 13 months to 23 months at March 31, 2020 and 13 months to 18 months at December 31, 2019. Time deposits with a maturity of less than 90 days at time of purchase are classified as cash and cash equivalents.

Acquisitions and Other Strate_2

Acquisitions and Other Strategic Initiatives (Tables)	3 Months Ended
	Mar. 31, 2020
Business Combinations [Abstract]
Schedule of Business Acquisitions, by Acquisition	The table below details the total consideration relating to the acquisition: Cash paid at closing $ 700 Additional consideration to be paid to sellers in 2020 (1) 2 Total consideration $ 702 (1) Represents additional consideration due to sellers following finalization of customary post-closing completion adjustments.
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed	Shown below is the preliminary purchase price allocation, which summarizes the fair value of the assets and liabilities assumed, at the date of acquisition: (Amounts in millions) Current assets $ 24 Intangible assets: Customer relationships (25 year weighted average life) $ 174 Database (10 year weighted average life) 86 Product technology (4 year weighted average life) 17 Trade name (3 year weighted average life) 3 Total intangible assets (19 year weighted average life) 280 Goodwill 494 Other assets 2 Liabilities: Accounts payable and accrued liabilities $ (5) Deferred revenue (20) Deferred tax liabilities (71) Other liabilities (2) Total liabilities (98) Net assets acquired $ 702

DERIVATIVE INSTRUMENTS AND HE_2

DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Tables)	3 Months Ended
	Mar. 31, 2020
Derivative [Line Items]
Schedule of Interest Rate Swap	The following table summarizes the Company’s interest rate swaps designated as fair value hedges: Notional Amount Hedged Item Nature of Swap As of March 31, As of December 31, Floating Interest Rate 2012 Senior Notes due 2022 Pay Floating/Receive Fixed $ 330 $ 330 3-month USD LIBOR 2017 Senior Notes due 2021 Pay Floating/Receive Fixed $ 500 $ 500 3-month USD LIBOR 2017 Senior Notes due 2023 Pay Floating/Receive Fixed $ 250 $ 250 3-month USD LIBOR 2017 Senior Notes due 2028 Pay Floating/Receive Fixed $ 500 $ — 3-month USD LIBOR Total $ 1,580 $ 1,080
Gains and Losses on Derivatives Designated as Hedging Instruments	The following table summarizes the impact to the statement 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/(loss) recognized in the consolidated statements of operations Three Months Ended March 31, 2020 2019 Interest expense, net $ (40) $ (52) Location on Consolidated Statements of Operations Net interest settlements and accruals on interest rate swaps Interest expense, net $ 3 $ — Fair value changes on interest rate swaps Interest expense, net $ 58 $ 11 Fair value changes on hedged debt Interest expense, net $ (58) $ (11)
Amount of Gain/(Loss) Recognized in AOCI on Derivative Net Investment Hedging Relationships (Effectiveness Portion)	The following tables provide information on the gains/(losses) on the Company’s net investment and cash flow hedges: Derivative and Non-Derivative Instruments in Net Investment Hedging Relationships Amount of Gain/(Loss) Recognized in AOCI on Derivative, net of Tax Amount of Gain/(Loss) Reclassified from AOCI into Income, net of Tax Gain/(Loss) Recognized in Income on Derivative (Amount Excluded from Effectiveness Testing) Three Months Ended Three Months Ended Three Months Ended 2020 2019 2020 2019 2020 2019 Cross currency swaps $ 66 $ 15 $ — $ — $ 16 $ 8 Long-term debt 23 8 — — — — Total net investment hedges $ 89 $ 23 $ — $ — $ 16 $ 8 Derivatives in Cash Flow Hedging Relationships Interest rate contracts (36) — (1) — — — Total cash flow hedges $ (36) $ — $ (1) $ — $ — $ — Total $ 53 $ 23 $ (1) $ — $ 16 $ 8
Components of Accumulated Other Comprehensive Income	The cumulative amount of net investment hedge and cash flow hedge gains (losses) remaining in AOCI is as follows: Cumulative Gains/(Losses), net of tax March 31, 2020 December 31, 2019 Net investment hedges Cross currency swaps $ 107 $ 41 FX forwards 26 26 Long-term debt 10 (13) Total net investment hedges $ 143 $ 54 Cash flow hedges Interest rate contracts $ (37) $ (2) Cross currency swaps 2 2 Total cash flow hedges (35) — Total net gain in AOCI $ 108 $ 54 The following tables show changes in AOCI by component (net of tax): Three Months Ended March 31, 2020 Pension and Other Retirement Benefits Cash Flow Hedges Foreign Currency Translation Adjustments Net Investment Hedges Total Balance December 31, 2019 $ (92) $ — $ (401) $ 54 $ (439) Other comprehensive income/(loss) before reclassifications (1) (36) (169) 89 (117) Amounts reclassified from AOCI 1 1 — — 2 Other comprehensive income/(loss) — (35) (169) 89 (115) Balance March 31, 2020 $ (92) $ (35) $ (570) $ 143 $ (554) Three Months Ended March 31, 2019 Pension and Other Retirement Benefits Cash Flow Hedges Foreign Currency Translation Adjustments Net Investment Hedges Total Balance December 31, 2018 $ (53) $ — $ (406) $ 33 $ (426) Other comprehensive income/(loss) before reclassifications 1 — (34) 24 (9) Amounts reclassified from AOCI — — — — — Adoption of ASU 2018-02 (17) — — (3) (20) Other comprehensive income/(loss) (16) — (34) 21 (29) Balance March 31, 2019 $ (69) $ — $ (440) $ 54 $ (455)
Summary of Notional Amounts of Outstanding Foreign Exchange Forwards	The following table summarizes the notional amounts of the Company’s outstanding foreign exchange forwards: March 31, 2020 December 31, 2019 Notional amount of currency pair: Sell Buy Sell Buy Contracts to sell USD for GBP $ 451 £ 379 $ 235 £ 178 Contracts to sell USD for Japanese Yen $ 29 ¥ 3,200 $ 29 ¥ 3,200 Contracts to sell USD for Canadian dollars $ 94 $ 130 $ 83 $ 110 Contracts to sell USD for Singapore dollars $ 59 S$ 86 $ 41 S$ 56 Contracts to sell USD for Euros $ 61 € 55 $ 421 € 378 Contracts to sell EUR for GBP € — £ — € 25 £ 21 NOTE: € = Euro, £ = British pound, $ = U.S. dollar, ¥ = Japanese Yen, C$ = Canadian dollar, S$= Singapore dollars
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 net losses on the Company’s derivatives which are not designated as hedging instruments: Derivatives not designated as accounting hedges Location on Statement of Operations Three Months Ended 2020 2019 Foreign exchange forwards Other non-operating expense, net $ (40) $ 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 instrument as well as the carrying value of its non-derivative debt instruments designated and qualifying as net investment hedges: Derivative and Non-Derivative Instruments Balance Sheet Location March 31, 2020 December 31, 2019 Assets: Derivatives designated as accounting hedges: Cross-currency swaps designated as net investment hedges Other assets $ 145 $ 56 Interest rate swaps designated as fair value hedges Other assets 85 27 Total derivatives designated as accounting hedges 230 83 Derivatives not designated as accounting hedges: FX forwards on certain assets and liabilities Other current assets 29 9 Total assets $ 259 $ 92 Liabilities: Derivatives designated as accounting hedges: Cross-currency swaps designated as net investment hedges Other liabilities $ 1 $ — Interest rate forward contracts designated as cash flow hedges Accounts payable and accrued liabilities 47 — Total derivatives designated as accounting hedges 48 — Non-derivatives designated as accounting hedges: Long-term debt designated as net investment hedge Long-term debt 1,372 1,403 Derivatives not designated as accounting hedges: FX forwards on certain assets and liabilities Accounts payable and accrued liabilities 10 — Total liabilities $ 1,430 $ 1,403
Designated as Hedging Instrument
Derivative [Line Items]
Schedule of Interest Rate Swap	The following table provides information on the cross-currency swaps designated as net investment hedges under ASC Topic 815: March 31, 2020 Pay Receive Nature of Swap Notional Amount Weighted Average Interest Rate Notional Amount Weighted Average Interest Rate Pay Fixed/Receive Fixed € 1,079 1.43% $ 1,220 3.96% Pay Floating/Receive Floating 1,381 Based on 3-month EURIBOR 1,580 Based on 3-month USD LIBOR Total € 2,460 $ 2,800 December 31, 2019 Pay Receive Nature of Swap Notional Amount Weighted Average Interest Rate Notional Amount Weighted Average Interest Rate Pay Fixed/Receive Fixed € 1,079 1.43% $ 1,220 3.96% Pay Floating/Receive Floating 931 Based on 3-month EURIBOR 1,080 Based on 3-month USD LIBOR Total € 2,010 $ 2,300

GOODWILL AND OTHER ACQUIRED I_2

GOODWILL AND OTHER ACQUIRED INTANGIBLE ASSETS (Tables)	3 Months Ended
	Mar. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Activity in Goodwill	The following table summarizes the activity in goodwill for the periods indicated: Three Months Ended March 31, 2020 MIS MA Consolidated Gross goodwill Accumulated impairment charge Net goodwill Gross goodwill Accumulated impairment charge Net goodwill Gross goodwill Accumulated impairment charge Net goodwill Balance at beginning of year $ 315 $ — $ 315 $ 3,419 $ (12) $ 3,407 $ 3,734 $ (12) $ 3,722 Additions/ adjustments (1) — — — 497 — 497 497 — 497 Foreign currency translation adjustments (1) — (1) (96) — (96) (97) — (97) Ending balance $ 314 $ — $ 314 $ 3,820 $ (12) $ 3,808 $ 4,134 $ (12) $ 4,122 Year Ended December 31, 2019 MIS MA Consolidated Gross goodwill Accumulated impairment charge Net goodwill Gross goodwill Accumulated impairment charge Net goodwill Gross goodwill Accumulated impairment charge Net goodwill Balance at beginning of year $ 258 $ — $ 258 $ 3,535 $ (12) $ 3,523 $ 3,793 $ (12) $ 3,781 Additions/ adjustments (2) 53 — 53 61 — 61 114 — 114 Foreign currency translation adjustments 4 — 4 (14) — (14) (10) — (10) Divestiture of MAKS — — — (163) — (163) (163) — (163) Ending balance $ 315 $ — $ 315 $ 3,419 $ (12) $ 3,407 $ 3,734 $ (12) $ 3,722 (1) The 2020 additions/adjustments for the MA segment in the table above relate to the acquisition of RDC and RBA. (2) The 2019 additions/adjustments for the MIS segment in the table above relate to the acquisitions of Vigeo Eiris and Four Twenty Seven. The 2019 additions/adjustments for the MA segment in the table above relate to the acquisition of RiskFirst and ABS Suite.
Acquired Intangible Assets and Related Amortization	Acquired intangible assets and related amortization consisted of: March 31, December 31, Customer relationships $ 1,460 $ 1,325 Accumulated amortization (244) (235) Net customer relationships 1,216 1,090 Trade secrets 30 30 Accumulated amortization (28) (29) Net trade secrets 2 1 Software/product technology 361 372 Accumulated amortization (133) (131) Net software/product technology 228 241 Trade names 149 150 Accumulated amortization (31) (30) Net trade names 118 120 Other (1) 177 80 Accumulated amortization (32) (34) Net other 145 46 Total acquired intangible assets, net $ 1,709 $ 1,498 (1) Other intangible assets primarily consist of databases, 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: Three Months Ended 2020 2019 Amortization expense $ 28 $ 26
Estimated Future Amortization Expense for Acquired Intangible Assets Subject to Amortization	Estimated future amortization expense for acquired intangible assets subject to amortization is as follows: Year Ending December 31, 2020 (After March 31,) $ 89 2021 116 2022 115 2023 111 2024 104 Thereafter 1,174 Total estimated future amortization $ 1,709

FAIR VALUE (Tables)

FAIR VALUE (Tables)	3 Months Ended
	Mar. 31, 2020
Fair Value Disclosures [Abstract]
Financial Instruments Carried at Fair Value on Recurring Basis	The table below presents information about items that are carried at fair value at March 31, 2020 and December 31, 2019: Fair value Measurement as of March 31, 2020 Description Balance Level 1 Level 2 Assets: Derivatives (1) $ 259 $ — $ 259 Mutual funds 39 39 — Total $ 298 $ 39 $ 259 Liabilities: Derivatives (1) $ 58 $ — $ 58 Total $ 58 $ — $ 58 Fair value Measurement as of December 31, 2019 Description Balance Level 1 Level 2 Assets: Derivatives (1) $ 92 $ — $ 92 Mutual funds 3 3 — Total $ 95 $ 3 $ 92 (1) Represents FX forwards on certain assets and liabilities as well as interest rate swaps, cross-currency swaps and forward contracts as more fully described in Note 10 to the condensed consolidated financial statements.

OTHER BALANCE SHEET AND STATE_2

OTHER BALANCE SHEET AND STATEMENT OF OPERATIONS INFORMATION (Tables)	3 Months Ended
	Mar. 31, 2020
Other Balance Sheet And Statement Of Operations Information [Abstract]
Additional Details Related to Certain Balance Sheet Captions	The following tables contain additional detail related to certain balance sheet captions: March 31, 2020 December 31, 2019 Other current assets: Prepaid taxes $ 98 $ 79 Prepaid expenses 80 71 Capitalized costs to obtain and fulfill sales contracts 85 91 Other 87 89 Total other current assets $ 350 $ 330 Other assets: Investments in non-consolidated affiliates $ 121 $ 117 Deposits for real-estate leases 14 13 Indemnification assets related to acquisitions 16 16 Mutual funds and fixed deposits 49 10 Company owned life insurance (at contract value) 11 — Costs to obtain sales contracts 117 119 Cross currency and interest rate swaps 230 83 Other 36 31 Total other assets $ 594 $ 389 March 31, 2020 December 31, 2019 Accounts payable and accrued liabilities: Salaries and benefits $ 160 $ 152 Incentive compensation 37 208 Customer credits, advanced payments and advanced billings 41 28 Dividends 3 7 Professional service fees 59 43 Interest accrued on debt 35 63 Accounts payable 26 38 Income taxes 91 73 Pension and other retirement employee benefits 7 7 Accrued royalties 20 25 Foreign exchange forwards on certain assets and liabilities 10 — Restructuring liability 9 21 Treasury lock forward contracts 47 — Other 119 108 Total accounts payable and accrued liabilities $ 664 $ 773 Other liabilities: Pension and other retirement employee benefits $ 196 $ 299 Interest accrued on UTPs 89 82 MAKS indemnification provisions 41 43 Income tax liability - non-current portion 51 51 Cross currency and interest rate swaps 1 — Restructuring liability 3 3 Other 22 26 Total other liabilities $ 403 $ 504
Other Non-Operating	The following table summarizes the components of other non-operating income (expense): Three Months Ended March 31, 2020 2019 FX gain (loss) $ 13 $ (6) Net periodic pension costs - other components 3 4 Income from investments in non-consolidated affiliates (3) 1 Other (1) 3 Total $ 12 $ 2

COMPREHENSIVE INCOME AND ACCU_2

COMPREHENSIVE INCOME AND ACCUMULATED OTHER COMPREHENSIVE INCOME (Tables)	3 Months Ended
	Mar. 31, 2020
Equity [Abstract]
Reclassifications out of AOCI	The following table provides details about the reclassifications out of AOCI: Three Months Ended March 31, Location in the consolidated statement of operations Losses on cash flow hedges 2020 2019 Interest rate contract $ (1) $ — Other non-operating income, net Income tax effect of item above — — Provision for income taxes Total net losses on cash flow hedges (1) — Pension and other retirement benefits Amortization of actuarial losses and prior service costs included in net income (1) (1) Operating expense Amortization of actuarial losses and prior service costs included in net income (1) — SG&A expense Total before income taxes (2) (1) Income tax effect of item above 1 1 Provision for income taxes Total pension and other retirement benefits (1) — Total net losses included in Net Income attributable to reclassifications out of AOCI $ (2) $ —
Components of Accumulated Other Comprehensive Income	The cumulative amount of net investment hedge and cash flow hedge gains (losses) remaining in AOCI is as follows: Cumulative Gains/(Losses), net of tax March 31, 2020 December 31, 2019 Net investment hedges Cross currency swaps $ 107 $ 41 FX forwards 26 26 Long-term debt 10 (13) Total net investment hedges $ 143 $ 54 Cash flow hedges Interest rate contracts $ (37) $ (2) Cross currency swaps 2 2 Total cash flow hedges (35) — Total net gain in AOCI $ 108 $ 54 The following tables show changes in AOCI by component (net of tax): Three Months Ended March 31, 2020 Pension and Other Retirement Benefits Cash Flow Hedges Foreign Currency Translation Adjustments Net Investment Hedges Total Balance December 31, 2019 $ (92) $ — $ (401) $ 54 $ (439) Other comprehensive income/(loss) before reclassifications (1) (36) (169) 89 (117) Amounts reclassified from AOCI 1 1 — — 2 Other comprehensive income/(loss) — (35) (169) 89 (115) Balance March 31, 2020 $ (92) $ (35) $ (570) $ 143 $ (554) Three Months Ended March 31, 2019 Pension and Other Retirement Benefits Cash Flow Hedges Foreign Currency Translation Adjustments Net Investment Hedges Total Balance December 31, 2018 $ (53) $ — $ (406) $ 33 $ (426) Other comprehensive income/(loss) before reclassifications 1 — (34) 24 (9) Amounts reclassified from AOCI — — — — — Adoption of ASU 2018-02 (17) — — (3) (20) Other comprehensive income/(loss) (16) — (34) 21 (29) Balance March 31, 2019 $ (69) $ — $ (440) $ 54 $ (455)

PENSION AND OTHER RETIREMENT _2

PENSION AND OTHER RETIREMENT BENEFITS (Tables)	3 Months Ended
	Mar. 31, 2020
Retirement Benefits [Abstract]
Components of Net Periodic Benefit Expense Related to Post-Retirement Plans	The components of net periodic benefit expense related to the Retirement Plans are as follows: Three Months Ended March 31, Pension Plans Other Retirement Plans 2020 2019 2020 2019 Components of net periodic expense Service cost $ 5 $ 4 $ 1 $ 1 Interest cost 4 5 — — Expected return on plan assets (5) (5) — — Amortization of net actuarial loss from earlier periods 2 1 — — Amortization of net prior service costs from earlier periods — — — — Net periodic expense $ 6 $ 5 $ 1 $ 1

INDEBTEDNESS (Tables)

INDEBTEDNESS (Tables)	3 Months Ended
	Mar. 31, 2020
Debt Disclosure [Abstract]
Summary of Total Indebtedness	The following table summarizes total indebtedness: March 31, 2020 Notes Payable: Principal Amount Fair Value of Interest Rate Swaps (1) Unamortized (Discount) Premium Unamortized Debt Issuance Costs Carrying Value 4.50% 2012 Senior Notes, due 2022 $ 500 $ 18 $ (1) $ (1) $ 516 4.875% 2013 Senior Notes, due 2024 500 — (1) (1) 498 5.25% 2014 Senior Notes (30-Year), due 2044 600 — 3 (5) 598 1.75% 2015 Senior Notes, due 2027 549 — — (3) 546 2.75% 2017 Senior Notes, due 2021 500 21 — (1) 520 2.625% 2017 Senior Notes, due 2023 500 15 (1) (2) 512 3.25% 2017 Senior Notes, due 2028 500 31 (4) (3) 524 3.25% 2018 Senior Notes, due 2021 300 — — (1) 299 4.25% 2018 Senior Notes, due 2029 400 — (3) (3) 394 4.875% 2018 Senior Notes, due 2048 400 — (7) (4) 389 0.950% 2019 Senior Notes, due 2030 823 — (3) (6) 814 3.75% 2020 Senior Note, due 2025 700 — (1) (6) 693 Commercial Paper 487 — (2) — 485 Total debt $ 6,759 $ 85 $ (20) $ (36) $ 6,788 Current portion (485) Total long-term debt $ 6,303 December 31, 2019 Notes Payable: Principal Amount Fair Value of Interest Rate Swaps (1) Unamortized (Discount) Premium Unamortized Debt Issuance Costs Carrying Value 4.50% 2012 Senior Notes, due 2022 $ 500 $ 9 $ (1) $ (1) $ 507 4.875% 2013 Senior Notes, due 2024 500 — (1) (2) 497 5.25% 2014 Senior Notes (30-Year), due 2044 600 — 4 (5) 599 1.75% 2015 Senior Notes, due 2027 561 — — (3) 558 2.75% 2017 Senior Notes, due 2021 500 11 (1) (2) 508 2.625% 2017 Senior Notes, due 2023 500 7 (1) (2) 504 3.25% 2017 Senior Notes, due 2028 500 — (4) (3) 493 3.25% 2018 Senior Notes, due 2021 300 — — (1) 299 4.25% 2018 Senior Notes, due 2029 400 — (3) (3) 394 4.875% 2018 Senior Notes, due 2048 400 — (7) (4) 389 0.950% 2019 Senior Notes, due 2030 842 — (3) (6) 833 Total long-term debt $ 5,603 $ 27 $ (17) $ (32) $ 5,581 (1) The Company has entered into interest rate swaps on the 2012 Senior Notes, the 2017 Senior Notes due 2021, the 2017 Senior Notes due 2023 and the 2017 Senior Notes due 2028 which are more fully discussed in Note 10 above. These amounts represent the cumulative amount of fair value hedging adjustments included in the carrying amount of the hedged debt.
Principal Payments Due on Long-Term Borrowings	The repayment schedule for the Company’s borrowings is as follows: Year Ending December 31, 2012 Senior Notes due 2022 2013 Senior Notes due 2024 2014 Senior Notes (30-Year) due 2044 2015 Senior Notes due 2027 2017 Senior Notes due 2021 2017 Senior Notes due 2023 2017 Senior Notes due 2028 2018 Senior Notes due 2021 2018 Senior Notes due 2029 2018 Senior Notes due 2048 2019 Senior Notes due 2030 2020 Senior Note due 2025 Commercial Paper Total 2020 (After March 31,) $ — $ — $ — $ — $ — $ — $ — $ — $ — $ — $ — $ — $ 487 $ 487 2021 — — — — 500 — — 300 — — — — — $ 800 2022 500 — — — — — — — — — — — — $ 500 2023 — — — — — 500 — — — — — — — $ 500 2024 — 500 — — — — — — — — — — — $ 500 Thereafter — — 600 549 — — 500 — 400 400 823 700 — $ 3,972 Total $ 500 $ 500 $ 600 $ 549 $ 500 $ 500 $ 500 $ 300 $ 400 $ 400 $ 823 $ 700 $ 487 $ 6,759
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: Three Months Ended 2020 2019 Income $ 4 $ 5 Expense on borrowings (31) (46) UTPs and other tax related liabilities (8) (6) Net periodic pension costs - interest component (5) (5) Total $ (40) $ (52)
Interest Paid	The following table shows the cash paid for interest: Three Months Ended 2020 2019 Interest paid $ 49 $ 73
Fair Value and Carrying Value of Long-Term Debt	The fair value and carrying value of the Company’s debt as of March 31, 2020 and December 31, 2019 are as follows: March 31, 2020 December 31, 2019 Carrying Amount Estimated Fair Value Carrying Amount Estimated Fair Value 4.50% 2012 Senior Notes, due 2022 $ 516 $ 521 $ 507 $ 531 4.875% 2013 Senior Notes, due 2024 498 536 497 551 5.25% 2014 Senior Notes (30-Year), due 2044 598 738 599 757 1.75% 2015 Senior Notes, due 2027 546 577 558 604 2.75% 2017 Senior Notes, due 2021 520 497 508 507 2.625% 2017 Senior Notes, due 2023 512 496 504 507 3.25% 2017 Senior Notes, due 2028 524 509 493 523 3.25% 2018 Senior Notes, due 2021 299 301 299 306 4.25% 2018 Senior Notes, due 2029 394 445 394 453 4.875% 2018 Senior Notes, due 2048 389 463 389 492 0.950% 2019 Senior Notes, due 2030 814 769 833 847 3.75% 2020 Senior Note, due 2025 693 732 — — Total $ 6,303 $ 6,584 $ 5,581 $ 6,078

LEASES (Tables)

LEASES (Tables)	3 Months Ended
	Mar. 31, 2020
Leases [Abstract]
Components of Lease Cost	The following table presents the components of the Company’s lease cost: Three Months Ended March 31, 2020 Three Months Ended Operating lease cost $ 24 $ 25 Sublease Income (1) — Variable lease cost 5 4 Total lease cost $ 28 $ 29
Schedule of Operating Leases Information	The following tables present other information related to the Company’s operating leases: Three Months Ended Three Months Ended Cash paid for amounts included in the measurement of operating lease liabilities $ 26 $ 26 Right-of-use assets obtained in exchange for new operating lease liabilities $ 9 $ 9 March 31, 2020 March 31, 2019 Weighted-average remaining lease term 6.7 years 7.3 years Weighted-average discount rate applied to operating leases 3.6 % 3.6 %
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 March 31, 2020: Year Ending December 31, Operating Leases 2020 (After March 31) $ 80 2021 103 2022 90 2023 84 2024 78 After 2024 186 Total lease payments (undiscounted) 621 Less: Interest 69 Present value of lease liabilities: $ 552 Lease liabilities - current $ 89 Lease liabilities - noncurrent $ 463

SEGMENT INFORMATION (Tables)

SEGMENT INFORMATION (Tables)	3 Months Ended
	Mar. 31, 2020
Segment Reporting Information [Line Items]
Financial Information by Segment	The table below shows revenue, Adjusted Operating Income and operating income by reportable segment. Adjusted Operating Income is a financial metric utilized by the Company’s chief operating decision maker to assess the profitability of each reportable segment. Refer to Note 3 for further details on the components of the Company’s revenue. Three Months Ended March 31, 2020 2019 MIS MA Eliminations Consolidated MIS MA Eliminations Consolidated Revenue $ 831 $ 498 $ (39) $ 1,290 $ 702 $ 474 $ (34) $ 1,142 Total Expenses 343 394 (39) 698 336 378 (34) 680 Operating income 488 104 — 592 366 96 — 462 Add: Restructuring (1) — — (1) 3 3 — 6 Depreciation and amortization 16 33 — 49 17 33 — 50 Acquisition-Related Expenses — — — — — 1 — 1 Loss pursuant to the divestiture of MAKS — 9 — 9 — — — — Adjusted Operating Income $ 503 $ 146 $ — $ 649 $ 386 $ 133 $ — $ 519
Company's Reportable Segment Revenues Disaggregated by Segment and Geographic Region	The following table presents the Company’s reportable segment revenues disaggregated by segment and geographic region: Three Months Ended 2020 2019 MIS: U.S. $ 503 $ 411 Non-U.S.: EMEA 171 149 Asia-Pacific 81 79 Americas 39 31 Total Non-U.S. 291 259 Total MIS 794 670 MA: U.S. 211 201 Non-U.S.: EMEA 192 184 Asia-Pacific 55 53 Americas 38 34 Total Non-U.S. 285 271 Total MA 496 472 Total MCO $ 1,290 $ 1,142
Operating Segments
Segment Reporting Information [Line Items]
Company's Reportable Segment Revenues Disaggregated by Segment and Geographic Region	Consolidated Revenue Information by Geographic Area: Three Months Ended March 31, 2020 2019 United States $ 714 $ 612 Non-U.S.: EMEA 363 333 Asia-Pacific 136 132 Americas 77 65 Total Non-U.S. 576 530 Total $ 1,290 $ 1,142

Description of Business and B_2

Description of Business and Basis of Presentation - Additional Information (Detail)	Mar. 25, 2020USD ($)	Mar. 31, 2020USD ($)	Mar. 31, 2020USD ($)segment	Jan. 01, 2020USD ($)	Dec. 31, 2019USD ($)
New Accounting Pronouncement, Early Adoption [Line Items]
Number of reportable segments | segment			2
Principal amount		$ 6,759,000,000	$ 6,759,000,000		$ 5,603,000,000
3.75% 2020 Senior Note, due 2025
New Accounting Pronouncement, Early Adoption [Line Items]
Principal amount	$ 700,000,000	$ 700,000,000	$ 700,000,000
Debt instrument, term	5 years	5 years
Credit Losses Accounting Standard
New Accounting Pronouncement, Early Adoption [Line Items]
Adoption of new ASU				$ (2,000,000)
Retained Earnings | Credit Losses Accounting Standard
New Accounting Pronouncement, Early Adoption [Line Items]
Adoption of new ASU				$ (2,000,000)

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Details) $ in Millions	3 Months Ended
	Mar. 31, 2020USD ($)
Accounting Policies [Abstract]
Expected credit losses	$ 24

Revenues - Revenue by Category

Revenues - Revenue by Category (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Disaggregation of Revenue [Line Items]
Revenue	$ 1,290	$ 1,142
Eliminations
Disaggregation of Revenue [Line Items]
Revenue	(39)	(34)
MIS
Disaggregation of Revenue [Line Items]
Revenue	794	670
MIS | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	831	702
MIS | Eliminations
Disaggregation of Revenue [Line Items]
Revenue	37	32
MIS | Corporate Finance (CFG)
Disaggregation of Revenue [Line Items]
Revenue	453	355
MIS | Corporate Finance (CFG) | Investment-grade
Disaggregation of Revenue [Line Items]
Revenue	144	97
MIS | Corporate Finance (CFG) | High-yield
Disaggregation of Revenue [Line Items]
Revenue	75	57
MIS | Corporate Finance (CFG) | Bank loans
Disaggregation of Revenue [Line Items]
Revenue	89	73
MIS | Corporate Finance (CFG) | Other accounts
Disaggregation of Revenue [Line Items]
Revenue	145	128
MIS | Structured Finance (SFG)
Disaggregation of Revenue [Line Items]
Revenue	96	101
MIS | Structured Finance (SFG) | Other accounts
Disaggregation of Revenue [Line Items]
Revenue	1	1
MIS | Structured Finance (SFG) | Asset-backed securities
Disaggregation of Revenue [Line Items]
Revenue	22	23
MIS | Structured Finance (SFG) | RMBS
Disaggregation of Revenue [Line Items]
Revenue	27	24
MIS | Structured Finance (SFG) | CMBS
Disaggregation of Revenue [Line Items]
Revenue	17	18
MIS | Structured Finance (SFG) | Structured credit
Disaggregation of Revenue [Line Items]
Revenue	29	35
MIS | Financial Institutions (FIG)
Disaggregation of Revenue [Line Items]
Revenue	125	116
MIS | Financial Institutions (FIG) | Other accounts
Disaggregation of Revenue [Line Items]
Revenue	3	3
MIS | Financial Institutions (FIG) | Banking
Disaggregation of Revenue [Line Items]
Revenue	86	80
MIS | Financial Institutions (FIG) | Insurance
Disaggregation of Revenue [Line Items]
Revenue	30	29
MIS | Financial Institutions (FIG) | Managed investments
Disaggregation of Revenue [Line Items]
Revenue	6	4
MIS | Public, Project And Infrastructure Finance (PPIF)
Disaggregation of Revenue [Line Items]
Revenue	109	93
MIS | Public, Project And Infrastructure Finance (PPIF) | Public finance / sovereign
Disaggregation of Revenue [Line Items]
Revenue	57	46
MIS | Public, Project And Infrastructure Finance (PPIF) | Project and infrastructure
Disaggregation of Revenue [Line Items]
Revenue	52	47
MIS | Rating Revenue
Disaggregation of Revenue [Line Items]
Revenue	783	665
MIS | MIS Other
Disaggregation of Revenue [Line Items]
Revenue	11	5
MA
Disaggregation of Revenue [Line Items]
Revenue	496	472
MA | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	498	474
MA | Eliminations
Disaggregation of Revenue [Line Items]
Revenue	2	2
MA | Research, Data And Analytics (RD&A)
Disaggregation of Revenue [Line Items]
Revenue	358	308
MA | Enterprise Risk Solutions (ERS)
Disaggregation of Revenue [Line Items]
Revenue	138	122
MA | Professional Services (PS)
Disaggregation of Revenue [Line Items]
Revenue	$ 0	$ 42

Revenues - Revenues disaggregat

Revenues - Revenues disaggregated by Line of Business and Geographical Area (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Disaggregation of Revenue [Line Items]
Revenue	$ 1,290	$ 1,142
United States
Disaggregation of Revenue [Line Items]
Revenue	714	612
Non-U.S.
Disaggregation of Revenue [Line Items]
Revenue	576	530
MIS
Disaggregation of Revenue [Line Items]
Revenue	794	670
MIS | United States
Disaggregation of Revenue [Line Items]
Revenue	503	411
MIS | Non-U.S.
Disaggregation of Revenue [Line Items]
Revenue	291	259
MIS | Corporate Finance (CFG)
Disaggregation of Revenue [Line Items]
Revenue	453	355
MIS | Corporate Finance (CFG) | United States
Disaggregation of Revenue [Line Items]
Revenue	314	243
MIS | Corporate Finance (CFG) | Non-U.S.
Disaggregation of Revenue [Line Items]
Revenue	139	112
MIS | Structured Finance (SFG)
Disaggregation of Revenue [Line Items]
Revenue	96	101
MIS | Structured Finance (SFG) | United States
Disaggregation of Revenue [Line Items]
Revenue	61	62
MIS | Structured Finance (SFG) | Non-U.S.
Disaggregation of Revenue [Line Items]
Revenue	35	39
MIS | Financial Institutions (FIG)
Disaggregation of Revenue [Line Items]
Revenue	125	116
MIS | Financial Institutions (FIG) | United States
Disaggregation of Revenue [Line Items]
Revenue	60	46
MIS | Financial Institutions (FIG) | Non-U.S.
Disaggregation of Revenue [Line Items]
Revenue	65	70
MIS | Public, Project And Infrastructure Finance (PPIF)
Disaggregation of Revenue [Line Items]
Revenue	109	93
MIS | Public, Project And Infrastructure Finance (PPIF) | United States
Disaggregation of Revenue [Line Items]
Revenue	68	60
MIS | Public, Project And Infrastructure Finance (PPIF) | Non-U.S.
Disaggregation of Revenue [Line Items]
Revenue	41	33
MIS | Rating Revenue
Disaggregation of Revenue [Line Items]
Revenue	783	665
MIS | Rating Revenue | United States
Disaggregation of Revenue [Line Items]
Revenue	503	411
MIS | Rating Revenue | Non-U.S.
Disaggregation of Revenue [Line Items]
Revenue	280	254
MIS | MIS Other
Disaggregation of Revenue [Line Items]
Revenue	11	5
MIS | MIS Other | United States
Disaggregation of Revenue [Line Items]
Revenue	0	0
MIS | MIS Other | Non-U.S.
Disaggregation of Revenue [Line Items]
Revenue	11	5
MA
Disaggregation of Revenue [Line Items]
Revenue	496	472
MA | United States
Disaggregation of Revenue [Line Items]
Revenue	211	201
MA | Non-U.S.
Disaggregation of Revenue [Line Items]
Revenue	285	271
MA | Research, Data And Analytics (RD&A)
Disaggregation of Revenue [Line Items]
Revenue	358	308
MA | Research, Data And Analytics (RD&A) | United States
Disaggregation of Revenue [Line Items]
Revenue	158	135
MA | Research, Data And Analytics (RD&A) | Non-U.S.
Disaggregation of Revenue [Line Items]
Revenue	200	173
MA | Enterprise Risk Solutions (ERS)
Disaggregation of Revenue [Line Items]
Revenue	138	122
MA | Enterprise Risk Solutions (ERS) | United States
Disaggregation of Revenue [Line Items]
Revenue	53	48
MA | Enterprise Risk Solutions (ERS) | Non-U.S.
Disaggregation of Revenue [Line Items]
Revenue	85	74
MA | Professional Services
Disaggregation of Revenue [Line Items]
Revenue	0	42
MA | Professional Services | United States
Disaggregation of Revenue [Line Items]
Revenue	0	18
MA | Professional Services | Non-U.S.
Disaggregation of Revenue [Line Items]
Revenue	$ 0	$ 24

Revenues - Consolidated Revenue

Revenues - Consolidated Revenue Information by Geographic Area (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Segment Reporting Information [Line Items]
Revenue	$ 1,290	$ 1,142
MIS
Segment Reporting Information [Line Items]
Revenue	794	670
MA
Segment Reporting Information [Line Items]
Revenue	496	472
United States
Segment Reporting Information [Line Items]
Revenue	714	612
United States | MIS
Segment Reporting Information [Line Items]
Revenue	503	411
United States | MA
Segment Reporting Information [Line Items]
Revenue	211	201
EMEA
Segment Reporting Information [Line Items]
Revenue	363	333
EMEA | MIS
Segment Reporting Information [Line Items]
Revenue	171	149
EMEA | MA
Segment Reporting Information [Line Items]
Revenue	192	184
Asia-Pacific
Segment Reporting Information [Line Items]
Revenue	136	132
Asia-Pacific | MIS
Segment Reporting Information [Line Items]
Revenue	81	79
Asia-Pacific | MA
Segment Reporting Information [Line Items]
Revenue	55	53
Americas
Segment Reporting Information [Line Items]
Revenue	77	65
Americas | MIS
Segment Reporting Information [Line Items]
Revenue	39	31
Americas | MA
Segment Reporting Information [Line Items]
Revenue	38	34
Non-U.S.
Segment Reporting Information [Line Items]
Revenue	576	530
Non-U.S. | MIS
Segment Reporting Information [Line Items]
Revenue	291	259
Non-U.S. | MA
Segment Reporting Information [Line Items]
Revenue	$ 285	$ 271

Revenues - Transaction and Rela

Revenues - Transaction and Relationship Revenue (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Disaggregation of Revenue [Line Items]
Revenue	$ 1,290	$ 1,142
Percentage of Revenues	100.00%	100.00%
MIS
Disaggregation of Revenue [Line Items]
Revenue	$ 794	$ 670
Percentage of Revenues	100.00%	100.00%
MA
Disaggregation of Revenue [Line Items]
Revenue	$ 496	$ 472
Percentage of Revenues	100.00%	100.00%
Corporate Finance (CFG) | MIS
Disaggregation of Revenue [Line Items]
Revenue	$ 453	$ 355
Percentage of Revenues	100.00%	100.00%
Structured Finance (SFG) | MIS
Disaggregation of Revenue [Line Items]
Revenue	$ 96	$ 101
Percentage of Revenues	100.00%	100.00%
Financial Institutions (FIG) | MIS
Disaggregation of Revenue [Line Items]
Revenue	$ 125	$ 116
Percentage of Revenues	100.00%	100.00%
Public, Project And Infrastructure Finance (PPIF) | MIS
Disaggregation of Revenue [Line Items]
Revenue	$ 109	$ 93
Percentage of Revenues	100.00%	100.00%
MIS Other | MIS
Disaggregation of Revenue [Line Items]
Revenue	$ 11	$ 5
Percentage of Revenues	100.00%	100.00%
Research, Data And Analytics (RD&A) | MA
Disaggregation of Revenue [Line Items]
Revenue	$ 358	$ 308
Percentage of Revenues	100.00%	100.00%
Enterprise Risk Solutions (ERS) | MA
Disaggregation of Revenue [Line Items]
Revenue	$ 138	$ 122
Percentage of Revenues	100.00%	100.00%
Professional Services | MA
Disaggregation of Revenue [Line Items]
Revenue	$ 0	$ 42
Percentage of Revenues		100.00%
Transaction Revenue
Disaggregation of Revenue [Line Items]
Revenue	$ 569	$ 481
Percentage of Revenues	44.00%	42.00%
Transaction Revenue | MIS
Disaggregation of Revenue [Line Items]
Revenue	$ 519	$ 410
Percentage of Revenues	65.00%	61.00%
Transaction Revenue | MA
Disaggregation of Revenue [Line Items]
Revenue	$ 50	$ 71
Percentage of Revenues	10.00%	15.00%
Transaction Revenue | Corporate Finance (CFG) | MIS
Disaggregation of Revenue [Line Items]
Revenue	$ 338	$ 249
Percentage of Revenues	75.00%	70.00%
Transaction Revenue | Structured Finance (SFG) | MIS
Disaggregation of Revenue [Line Items]
Revenue	$ 50	$ 57
Percentage of Revenues	52.00%	56.00%
Transaction Revenue | Financial Institutions (FIG) | MIS
Disaggregation of Revenue [Line Items]
Revenue	$ 60	$ 48
Percentage of Revenues	48.00%	41.00%
Transaction Revenue | Public, Project And Infrastructure Finance (PPIF) | MIS
Disaggregation of Revenue [Line Items]
Revenue	$ 69	$ 55
Percentage of Revenues	63.00%	59.00%
Transaction Revenue | MIS Other | MIS
Disaggregation of Revenue [Line Items]
Revenue	$ 2	$ 1
Percentage of Revenues	18.00%	20.00%
Transaction Revenue | Research, Data And Analytics (RD&A) | MA
Disaggregation of Revenue [Line Items]
Revenue	$ 18	$ 5
Percentage of Revenues	5.00%	2.00%
Transaction Revenue | Enterprise Risk Solutions (ERS) | MA
Disaggregation of Revenue [Line Items]
Revenue	$ 32	$ 24
Percentage of Revenues	23.00%	20.00%
Transaction Revenue | Professional Services | MA
Disaggregation of Revenue [Line Items]
Revenue		$ 42
Percentage of Revenues		100.00%
Relationship Revenue
Disaggregation of Revenue [Line Items]
Revenue	$ 721	$ 661
Percentage of Revenues	56.00%	58.00%
Relationship Revenue | MIS
Disaggregation of Revenue [Line Items]
Revenue	$ 275	$ 260
Percentage of Revenues	35.00%	39.00%
Relationship Revenue | MA
Disaggregation of Revenue [Line Items]
Revenue	$ 446	$ 401
Percentage of Revenues	90.00%	85.00%
Relationship Revenue | Corporate Finance (CFG) | MIS
Disaggregation of Revenue [Line Items]
Revenue	$ 115	$ 106
Percentage of Revenues	25.00%	30.00%
Relationship Revenue | Structured Finance (SFG) | MIS
Disaggregation of Revenue [Line Items]
Revenue	$ 46	$ 44
Percentage of Revenues	48.00%	44.00%
Relationship Revenue | Financial Institutions (FIG) | MIS
Disaggregation of Revenue [Line Items]
Revenue	$ 65	$ 68
Percentage of Revenues	52.00%	59.00%
Relationship Revenue | Public, Project And Infrastructure Finance (PPIF) | MIS
Disaggregation of Revenue [Line Items]
Revenue	$ 40	$ 38
Percentage of Revenues	37.00%	41.00%
Relationship Revenue | MIS Other | MIS
Disaggregation of Revenue [Line Items]
Revenue	$ 9	$ 4
Percentage of Revenues	82.00%	80.00%
Relationship Revenue | Research, Data And Analytics (RD&A) | MA
Disaggregation of Revenue [Line Items]
Revenue	$ 340	$ 303
Percentage of Revenues	95.00%	98.00%
Relationship Revenue | Enterprise Risk Solutions (ERS) | MA
Disaggregation of Revenue [Line Items]
Revenue	$ 106	$ 98
Percentage of Revenues	77.00%	80.00%
Relationship Revenue | Professional Services | MA
Disaggregation of Revenue [Line Items]
Revenue		$ 0
Percentage of Revenues		0.00%

Revenues - Revenue Recognition

Revenues - Revenue Recognition Timing (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Disaggregation of Revenue [Line Items]
Revenue recognized	$ 1,290	$ 1,142
At Point in Time
Disaggregation of Revenue [Line Items]
Revenue recognized	558	440
Over Time
Disaggregation of Revenue [Line Items]
Revenue recognized	732	702
MIS
Disaggregation of Revenue [Line Items]
Revenue recognized	794	670
MIS | At Point in Time
Disaggregation of Revenue [Line Items]
Revenue recognized	519	410
MIS | Over Time
Disaggregation of Revenue [Line Items]
Revenue recognized	275	260
MA
Disaggregation of Revenue [Line Items]
Revenue recognized	496	472
MA | At Point in Time
Disaggregation of Revenue [Line Items]
Revenue recognized	39	30
MA | Over Time
Disaggregation of Revenue [Line Items]
Revenue recognized	$ 457	$ 442

Revenues - Additional Informati

Revenues - Additional Information (Detail) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
MIS
Disaggregation of Revenue [Line Items]
Unbilled Receivables	$ 404	$ 346
MA
Disaggregation of Revenue [Line Items]
Unbilled Receivables	$ 59	$ 53

Revenues - Schedule of Changes

Revenues - Schedule of Changes in the Deferred Revenue Balances (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Change in Contract with Customer, Liability [Abstract]
Beginning Balance	$ 1,162	$ 1,076
Revenue recognized that was included in the deferred revenue balance at the beginning of the period	(435)	(400)
Increases due to amounts billable excluding amounts recognized as revenue during the period	504	502
Increases due to RDC acquisition during the period	20
Effect of exchange rate changes	(29)	5
Total changes in deferred revenue	60	107
Ending Balance	1,222	1,183
Deferred revenue - current	1,113	1,062	$ 1,050
Deferred revenue - noncurrent	109	121	$ 112
MIS
Change in Contract with Customer, Liability [Abstract]
Beginning Balance	322	326
Revenue recognized that was included in the deferred revenue balance at the beginning of the period	(99)	(93)
Increases due to amounts billable excluding amounts recognized as revenue during the period	161	155
Increases due to RDC acquisition during the period	0
Effect of exchange rate changes	(5)	0
Total changes in deferred revenue	57	62
Ending Balance	379	388
Deferred revenue - current	275	271
Deferred revenue - noncurrent	104	117
MA
Change in Contract with Customer, Liability [Abstract]
Beginning Balance	840	750
Revenue recognized that was included in the deferred revenue balance at the beginning of the period	(336)	(307)
Increases due to amounts billable excluding amounts recognized as revenue during the period	343	347
Increases due to RDC acquisition during the period	20
Effect of exchange rate changes	(24)	5
Total changes in deferred revenue	3	45
Ending Balance	843	795
Deferred revenue - current	838	791
Deferred revenue - noncurrent	$ 5	$ 4

Revenues - Expected Recognition

Revenues - Expected Recognition Period for Remaining Performance Obligations (Detail) $ in Millions	Mar. 31, 2020USD ($)
MIS
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 136
MIS | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, percentage	20.00%
Revenue, remaining performance obligation, period	1 year
MIS | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, percentage	50.00%
Revenue, remaining performance obligation, period	4 years
MA
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 2,000
MA | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, percentage	70.00%
Revenue, remaining performance obligation, period	1 year
MA | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, percentage	20.00%
Revenue, remaining performance obligation, period	1 year

Stock-Based Compensation - Stoc

Stock-Based Compensation - Stock-Based Compensation Cost and Associated Tax Benefit (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Share-based Payment Arrangement, Noncash Expense [Abstract]
Stock-based compensation cost	$ 37	$ 36
Tax benefit	$ 7	$ 8

Stock-Based Compensation - Addi

Stock-Based Compensation - Additional Information (Detail) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2020USD ($)$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee stock options, granted (in shares) | shares	0.1
Employee stock options, weighted average grant date fair value (in usd per share) | $ / shares	$ 60.53
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Other than options, shares granted (in shares) | shares	0.5
Other than options, weighted average grant date fair value (in usd per share) | $ / shares	$ 280.42
Award vesting period (in years)	4 years
Unrecognized compensation expense | $	$ 252
Weighted average period to recognize expense	2 years 9 months 18 days
Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)	4 years
Unrecognized compensation expense | $	$ 10
Weighted average period to recognize expense	2 years 7 months 6 days
Performance Based Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Other than options, shares granted (in shares) | shares	0.1
Other than options, weighted average grant date fair value (in usd per share) | $ / shares	$ 273.85
Award vesting period (in years)	3 years
Unrecognized compensation expense | $	$ 31
Weighted average period to recognize expense	2 years 3 months 18 days

Stock-Based Compensation - Weig

Stock-Based Compensation - Weighted Average Assumptions used in Determining Fair Value for Options Granted (Detail)	3 Months Ended
	Mar. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Expected dividend yield	0.80%
Expected stock volatility	22.43%
Risk-free interest rate	1.45%
Expected holding period	5 years 8 months 12 days

Stock-Based Compensation - St_2

Stock-Based Compensation - Stock Option Exercises and Restricted Stock Vesting (Detail) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Proceeds from stock option exercises	$ 13	$ 12
Aggregate intrinsic value	46	36
Tax benefit realized upon exercise	$ 11	$ 9
Number of shares exercised (shares)	0.2	0.3
Restricted Stock
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Fair value of shares vested	$ 191	$ 147
Tax benefit realized upon vesting	$ 44	$ 34
Number of shares vested (shares)	0.8	0.8
Performance Based Restricted Stock
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Fair value of shares vested	$ 70	$ 48
Tax benefit realized upon vesting	$ 17	$ 12
Number of shares vested (shares)	0.3	0.3

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Income Tax Contingency [Line Items]
Effective tax rate (percent)	13.70%	9.20%
Excess tax benefits from stock compensation	$ 40
Decrease to tax positions	23
Overall increase (decrease) in unrecognized tax benefits (UTPs)	(28)
Net of Federal Tax
Income Tax Contingency [Line Items]
Overall increase (decrease) in unrecognized tax benefits (UTPs)	$ (29)

Income Taxes - Income Taxes Pai

Income Taxes - Income Taxes Paid (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Income Tax Disclosure [Abstract]
Income taxes paid	$ 29	$ 37

Weighted Average Shares Outst_3

Weighted Average Shares Outstanding - Reconciliation of Basic to Diluted Shares Outstanding (Detail) - shares shares in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Earnings Per Share [Abstract]
Basic (in shares)	187.5	190.4
Dilutive effect of shares issuable under stock-based compensation plans (in shares)	2.1	2.4
Diluted (in shares)	189.6	192.8
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)	0.3	0.4

Accelerated Share Repurhase Pro

Accelerated Share Repurhase Program - Additional Information (Detail) - USD ($) $ / shares in Units, shares in Millions	Apr. 26, 2019	Feb. 20, 2019	Mar. 31, 2020
Accelerated Share Repurchases [Line Items]
Accelerated share repurchases, final price paid per share (in usd per share)			$ 180.33
February 20, 2019
Accelerated Share Repurchases [Line Items]
Accelerated share repurchase payment		$ 500,000,000
February 20, 2019 | Accelerated Share Repurchases
Accelerated Share Repurchases [Line Items]
Treasury shares repurchased (in shares)		2.2
April 26, 2019 | Accelerated Share Repurchases
Accelerated Share Repurchases [Line Items]
Treasury shares repurchased (in shares)	0.6		2.8

Cash Equivalents and Investme_3

Cash Equivalents and Investments (Detail) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Cash and Cash Equivalents [Line Items]
Fair Value	$ 39	$ 3
Cash and cash equivalents	2,141	1,832
Short-term investments	90	98
Certificates of deposit and money market deposit accounts
Cash and Cash Equivalents [Line Items]
Cost	1,276	971
Gains/(Losses)	0	0
Fair Value	1,276	971
Cash and cash equivalents	1,176	866
Short-term investments	87	95
Other assets	13	10
Mutual funds
Cash and Cash Equivalents [Line Items]
Cost	46	3
Gains/(Losses)	(7)	0
Fair Value	39	3
Cash and cash equivalents	0	0
Short-term investments	3	3
Other assets	$ 36	$ 0

Cash Equivalents and Investme_4

Cash Equivalents and Investments (Footnote) (Detail)	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Short-term Investments | Certificates of deposit and money market deposit accounts | Minimum
Cash and Cash Equivalents [Line Items]
Securities maturity period	1 month	1 month
Short-term Investments | Certificates of deposit and money market deposit accounts | Maximum
Cash and Cash Equivalents [Line Items]
Securities maturity period	12 months	12 months
Other assets | Certificates of deposit and money market deposit accounts | Minimum
Cash and Cash Equivalents [Line Items]
Securities maturity period	13 months	13 months
Other assets | Certificates of deposit and money market deposit accounts | Maximum
Cash and Cash Equivalents [Line Items]
Securities maturity period	23 months	18 months
Cash and Cash Equivalents | Mutual funds | Maximum
Cash and Cash Equivalents [Line Items]
Securities maturity period	90 days

Cash Equivalents and Investme_5

Cash Equivalents and Investments (Narrative) (Detail) $ in Millions	Mar. 31, 2020USD ($)
Cash and Cash Equivalents [Abstract]
Cash surrender value of life insurance	$ 11

Acquisitions and Other Strate_3

Acquisitions and Other Strategic Initiatives - Narrative (Details) - USD ($) $ in Millions	Mar. 31, 2020	Feb. 13, 2020
Regulatory Data Corporation
Business Acquisition [Line Items]
Business acquisition interests acquired		100.00%
Acquired cash included in current assets		$ 6
Accounts receivable gross included in current assets		$ 14
RBA International
Business Acquisition [Line Items]
Business acquisition interests acquired	100.00%

Acquisitions and Other Strate_4

Acquisitions and Other Strategic Initiatives - Total Consideration Relating to Acquisition (Details) - Regulatory Data Corporation $ in Millions	Feb. 13, 2020USD ($)
Business Acquisition [Line Items]
Cash paid at closing	$ 700
Additional consideration to be paid to sellers in 2020	2
Business Combination, Consideration Transferred, Total	$ 702

Acquisitions and Other Strate_5

Acquisitions and Other Strategic Initiatives - Purchase Price Allocation (Details) - USD ($) $ in Millions	Feb. 13, 2020	Mar. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Business Acquisition [Line Items]
Goodwill		$ 4,122	$ 3,722	$ 3,781
Regulatory Data Corporation
Business Acquisition [Line Items]
Current assets	$ 24
Total intangible assets	280
Goodwill	494
Other assets	2
Accounts payable and accrued liabilities	(5)
Deferred revenue	(20)
Deferred tax liabilities	(71)
Other liabilities	(2)
Total liabilities	(98)
Net assets acquired	$ 702
Acquired finite-lived intangible asset, useful life	19 years
Regulatory Data Corporation | Customer relationships
Business Acquisition [Line Items]
Total intangible assets	$ 174
Acquired finite-lived intangible asset, useful life	25 years
Regulatory Data Corporation | Database
Business Acquisition [Line Items]
Total intangible assets	$ 86
Acquired finite-lived intangible asset, useful life	10 years
Regulatory Data Corporation | Product technology
Business Acquisition [Line Items]
Total intangible assets	$ 17
Acquired finite-lived intangible asset, useful life	4 years
Regulatory Data Corporation | Trade names
Business Acquisition [Line Items]
Total intangible assets	$ 3
Acquired finite-lived intangible asset, useful life	3 years

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	3 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Derivative [Line Items]
Notional Amount	$ 1,580	$ 1,080
4.50% 2012 Senior Notes, due 2022
Derivative [Line Items]
Nature of Swap	Pay Floating/Receive Fixed
Notional Amount	$ 330	330
Floating Interest Rate	3-month USD LIBOR
2.75% 2017 Senior Notes, due 2021
Derivative [Line Items]
Nature of Swap	Pay Floating/Receive Fixed
Notional Amount	$ 500	500
Floating Interest Rate	3-month USD LIBOR
2.625% 2017 Senior Notes, due 2023
Derivative [Line Items]
Nature of Swap	Pay Floating/Receive Fixed
Notional Amount	$ 250	250
Floating Interest Rate	3-month USD LIBOR
2017 Senior Notes due 2028
Derivative [Line Items]
Nature of Swap	Pay Floating/Receive Fixed
Notional Amount	$ 500	$ 0
Floating Interest Rate	3-month USD LIBOR

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	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Interest expense, net	$ (40)	$ (52)
Designated as Hedging Instrument | Interest Rate Swap | Interest Expense
Derivative Instruments, Gain (Loss) [Line Items]
Fair value changes on interest rate swaps	58	11
Fair value changes on hedged debt	(58)	(11)
Designated as Hedging Instrument | Interest Rate Swap | Interest Expense | Fair Value hedge Net Interest Settlements and Accruals
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) recognized in income	$ 3	$ 0

Derivative Instruments And He_5

Derivative Instruments And Hedging Activities - Additional Information (Detail) - Designated as Hedging Instrument $ in Millions	3 Months Ended
	Mar. 31, 2020USD ($)	Mar. 31, 2020EUR (€)
2021 | Cross-currency swap
Derivative [Line Items]
Notional Amount		€ 688,000,000
2022 | Cross-currency swap
Derivative [Line Items]
Notional Amount		438,000,000
2023 | Cross-currency swap
Derivative [Line Items]
Notional Amount		442,000,000
2024 | Cross-currency swap
Derivative [Line Items]
Notional Amount		443,000,000
2026 | Cross-currency swap
Derivative [Line Items]
Notional Amount		€ 450,000,000
Cash Flow Hedging | Forward Contracts
Derivative [Line Items]
Notional Amount | $	$ 300
Forward interest rate	2.0103%	2.0103%
Debt instrument, term	30 years
1.75% 2015 Senior Notes, due 2027 | Net Investment Hedging | Cross-currency swap
Derivative [Line Items]
Notional Amount		€ 500,000,000
2019 Senior Notes Due 2030 | Net Investment Hedging | Cross-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) - Cross-currency swap - Net Investment Hedging € in Millions, $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2020USD ($)	Dec. 31, 2019USD ($)	Mar. 31, 2020EUR (€)	Dec. 31, 2019EUR (€)
3.96%
Derivative [Line Items]
Nature of Swap	Pay Fixed/Receive Fixed	Pay Fixed/Receive Fixed
3-month U.S. LIBOR
Derivative [Line Items]
Nature of Swap	Pay Floating/Receive Floating	Pay Floating/Receive Floating
Currency Paid
Derivative [Line Items]
Notional Amount | €			€ 2,460	€ 2,010
Currency Paid | 1.43%
Derivative [Line Items]
Notional Amount | €			€ 1,079	€ 1,079
Weighted Average Fixed Interest Rate	1.43%	1.43%	1.43%	1.43%
Currency Paid | 3-month EURIBOR
Derivative [Line Items]
Notional Amount | €			€ 1,381	€ 931
Weighted Average Floating Interest Rate	Based on 3-month EURIBOR	Based on 3-month EURIBOR
Currency Received
Derivative [Line Items]
Notional Amount | $	$ 2,800	$ 2,300
Currency Received | 3.96%
Derivative [Line Items]
Notional Amount | $	$ 1,220	$ 1,220
Weighted Average Fixed Interest Rate	3.96%	3.96%	3.96%	3.96%
Currency Received | 3-month U.S. LIBOR
Derivative [Line Items]
Notional Amount | $	$ 1,580	$ 1,080
Weighted Average Floating Interest Rate	Based on 3-month USD LIBOR	Based on 3-month USD LIBOR

Derivative Instruments And He_7

Derivative Instruments And Hedging Activities - Gains (Losses) Recognized in AOCI and Reclassified from AOCI on Derivatives (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Cash Flow Hedging Relationships, Amount of Gain/(Loss) Recognized in AOCI on Derivative, net of Tax	$ (36)	$ 0
Total, Amount of Gain/(Loss) Recognized in AOCI on Derivative, net of Tax	53	23
Cash Flow Hedging Relationships, Amount of Gain/(Loss) Reclassified from AOCI into Income, net of Tax	(1)	0
Total, Amount of Gain/(Loss) Reclassified from AOCI into Income, net of Tax	(1)	0
Gain/(Loss) Recognized in Income on Derivative (Amount Excluded from Effectiveness Testing)	16	8
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	89	23
Net Investment Hedging Relationships, Amount of Gain/(Loss) Reclassified from AOCI into Income, net of Tax	0	0
Gain/(Loss) Recognized in Income on Derivative (Amount Excluded from Effectiveness Testing)	16	8
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	(36)	0
Cash Flow Hedging Relationships, Amount of Gain/(Loss) Reclassified from AOCI into Income, net of Tax	(1)	0
Gain/(Loss) Recognized in Income on Derivative (Amount Excluded from Effectiveness Testing)	0	0
Cross-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	66	15
Net Investment Hedging Relationships, Amount of Gain/(Loss) Reclassified from AOCI into Income, net of Tax	0	0
Gain/(Loss) Recognized in Income on Derivative (Amount Excluded from Effectiveness Testing)	16	8
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	23	8
Net Investment Hedging Relationships, Amount of Gain/(Loss) Reclassified from AOCI into Income, net of Tax	0	0
Gain/(Loss) Recognized in Income on Derivative (Amount Excluded from Effectiveness Testing)	0	0
Interest rate contract | 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	(36)	0
Cash Flow Hedging Relationships, Amount of Gain/(Loss) Reclassified from AOCI into Income, net of Tax	(1)	0
Gain/(Loss) Recognized in Income on Derivative (Amount Excluded from Effectiveness Testing)	$ 0	$ 0

Derivative Instruments And He_8

Derivative Instruments And Hedging Activities - Cumulative Amount of Unrecognized Hedge Losses Recorded in AOCI (Detail) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Derivative [Line Items]
Accumulated other comprehensive loss	$ (554)	$ (439)
Designated as Hedging Instrument
Derivative [Line Items]
Accumulated other comprehensive loss	108	54
Net Investment Hedging
Derivative [Line Items]
Accumulated other comprehensive loss	143	54
Net Investment Hedging | FX forwards
Derivative [Line Items]
Accumulated other comprehensive loss	26	26
Net Investment Hedging | Long-term debt
Derivative [Line Items]
Accumulated other comprehensive loss	10	(13)
Net Investment Hedging | Cross-currency swap
Derivative [Line Items]
Accumulated other comprehensive loss	107	41
Cash Flow Hedging
Derivative [Line Items]
Accumulated other comprehensive loss	(35)	0
Cash Flow Hedging | Interest rate contract
Derivative [Line Items]
Accumulated other comprehensive loss	(37)	(2)
Cash Flow Hedging | Cross-currency swap
Derivative [Line Items]
Accumulated other comprehensive loss	$ 2	$ 2

Derivative Instruments And He_9

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	Mar. 31, 2020USD ($)	Mar. 31, 2020CAD ($)	Mar. 31, 2020SGD ($)	Mar. 31, 2020GBP (£)	Mar. 31, 2020EUR (€)	Mar. 31, 2020JPY (¥)	Dec. 31, 2019USD ($)	Dec. 31, 2019CAD ($)	Dec. 31, 2019SGD ($)	Dec. 31, 2019GBP (£)	Dec. 31, 2019EUR (€)	Dec. 31, 2019JPY (¥)
Contracts to sell USD for GBP
Derivative [Line Items]
Notional Amount	$ 451			£ 379			$ 235			£ 178
Contracts to sell USD for Japanese Yen
Derivative [Line Items]
Notional Amount	29					¥ 3,200	29					¥ 3,200
Contracts to sell USD for Canadian dollars
Derivative [Line Items]
Notional Amount	94	$ 130					83	$ 110
Contracts to sell USD for Singapore dollars
Derivative [Line Items]
Notional Amount	59		$ 86				41		$ 56
Contracts to sell USD for Euros
Derivative [Line Items]
Notional Amount	$ 61				€ 55		$ 421				€ 378
Contracts to sell EUR for GBP
Derivative [Line Items]
Notional Amount				£ 0	€ 0					£ 21	€ 25

Derivative Instruments And H_10

Derivative Instruments And Hedging Activities - Summary of Net Gain (Loss) on Foreign Exchange Forwards Not Designated as Hedging Instruments (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Other non-operating expense, net
Derivative Instruments, Gain (Loss) [Line Items]
Foreign exchange forwards amount of gain (loss) recognized in income	$ (40)	$ 1

Derivative Instruments And H_11

Derivative Instruments And Hedging Activities - Fair Value of Derivative Instruments (Detail) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Derivatives, Fair Value [Line Items]
Assets	$ 259	$ 92
Liabilities	1,430	1,403
Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Assets	230	83
Liabilities	48	0
Designated as Hedging Instrument | Long-term debt | Net Investment Hedging
Derivatives, Fair Value [Line Items]
Liabilities	1,372	1,403
Designated as Hedging Instrument | Cross-currency swap | Other assets | Net Investment Hedging
Derivatives, Fair Value [Line Items]
Assets	145	56
Designated as Hedging Instrument | Cross-currency swap | Other liabilities | Net Investment Hedging
Derivatives, Fair Value [Line Items]
Liabilities	1	0
Designated as Hedging Instrument | Interest Rate Swap | Other assets | Fair Value Hedging
Derivatives, Fair Value [Line Items]
Assets	85	27
Designated as Hedging Instrument | Interest Rate Swap | Accounts payable and accrued liabilities | Cash Flow Hedging
Derivatives, Fair Value [Line Items]
Liabilities	47	0
Not Designated as Accounting Hedges | FX forwards | Other current assets
Derivatives, Fair Value [Line Items]
Assets	29	9
Not Designated as Accounting Hedges | FX forwards | Accounts payable and accrued liabilities
Derivatives, Fair Value [Line Items]
Liabilities	$ 10	$ 0

Goodwill And Other Acquired I_3

Goodwill And Other Acquired Intangible Assets - Activity in Goodwill (Detail) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Goodwill [Roll Forward]
Beginning balance, Goodwill gross	$ 3,734	$ 3,793
Beginning balance, Accumulated impairment charge	(12)	(12)
Beginning balance, goodwill net	3,722	3,781
Additions/adjustments	497	114
Foreign currency translation adjustments	(97)	(10)
Divestiture of MAKS		(163)
Ending balance, Goodwill gross	4,134	3,734
Ending balance, Accumulated impairment charge	(12)	(12)
Ending balance, goodwill net	4,122	3,722
MIS
Goodwill [Roll Forward]
Beginning balance, Goodwill gross	315	258
Beginning balance, Accumulated impairment charge	0	0
Beginning balance, goodwill net	315	258
Additions/adjustments	0	53
Foreign currency translation adjustments	(1)	4
Divestiture of MAKS		0
Ending balance, Goodwill gross	314	315
Ending balance, Accumulated impairment charge	0	0
Ending balance, goodwill net	314	315
MA
Goodwill [Roll Forward]
Beginning balance, Goodwill gross	3,419	3,535
Beginning balance, Accumulated impairment charge	(12)	(12)
Beginning balance, goodwill net	3,407	3,523
Additions/adjustments	497	61
Foreign currency translation adjustments	(96)	(14)
Divestiture of MAKS		(163)
Ending balance, Goodwill gross	3,820	3,419
Ending balance, Accumulated impairment charge	(12)	(12)
Ending balance, goodwill net	$ 3,808	$ 3,407

Goodwill And Other Acquired I_4

Goodwill And Other Acquired Intangible Assets - Acquired Intangible Assets and Related Amortization (Detail) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets, net	$ 1,709	$ 1,498
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets, gross	1,460	1,325
Accumulated amortization	(244)	(235)
Acquired intangible assets, net	1,216	1,090
Trade secrets
Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets, gross	30	30
Accumulated amortization	(28)	(29)
Acquired intangible assets, net	2	1
Software/product technology
Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets, gross	361	372
Accumulated amortization	(133)	(131)
Acquired intangible assets, net	228	241
Trade names
Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets, gross	149	150
Accumulated amortization	(31)	(30)
Acquired intangible assets, net	118	120
Other
Finite-Lived Intangible Assets [Line Items]
Acquired intangible assets, gross	177	80
Accumulated amortization	(32)	(34)
Acquired intangible assets, net	$ 145	$ 46

Goodwill And Other Acquired I_5

Goodwill And Other Acquired Intangible Assets - Amortization Expense Relating to Acquired Intangible Assets (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization expense	$ 28	$ 26

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	Mar. 31, 2020USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
2020 (after March 31)	$ 89
2021	116
2022	115
2023	111
2024	104
Thereafter	1,174
Total estimated future amortization	$ 1,709

Goodwill And Other Acquired I_7

Goodwill And Other Acquired Intangible Assets - Additional Information (Details) - Dec. 26, 2019 $ in Thousands, ₨ in Millions	USD ($)	INR (₨)
Indian Credit Ratings Agency
Loss Contingencies [Line Items]
Penalty in period	$ 35	₨ 2.5

Fair Value - Financial Instrume

Fair Value - Financial Instruments Carried at Fair Value on Recurring Basis (Detail) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Assets:
Derivatives	$ 259	$ 92
Mutual funds	39	3
Total	298	95
Liabilities:
Derivatives	58
Total	58
Level 1
Assets:
Derivatives	0	0
Mutual funds	39	3
Total	39	3
Liabilities:
Derivatives	0
Total	0
Level 2
Assets:
Derivatives	259	92
Mutual funds	0	0
Total	259	$ 92
Liabilities:
Derivatives	58
Total	$ 58

Other Balance Sheet and State_3

Other Balance Sheet and Statement of Operations Information - Additional Details Related to Certain Balance Sheet Captions (Detail) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Other current assets:
Prepaid taxes	$ 98	$ 79
Prepaid expenses	80	71
Capitalized costs to obtain and fulfill sales contracts	85	91
Other	87	89
Total other current assets	350	330
Other assets:
Investments in non-consolidated affiliates	121	117
Deposits for real-estate leases	14	13
Indemnification assets related to acquisitions	16	16
Mutual funds and fixed deposits	49	10
Company owned life insurance (at contract value)	11	0
Costs to obtain sales contracts	117	119
Cross currency and interest rate swaps	230	83
Other	36	31
Total other assets	594	389
Accounts payable and accrued liabilities:
Salaries and benefits	160	152
Incentive compensation	37	208
Customer credits, advanced payments and advanced billings	41	28
Dividends	3	7
Professional service fees	59	43
Interest accrued on debt	35	63
Accounts payable	26	38
Income taxes	91	73
Pension and other retirement employee benefits	7	7
Accrued royalties	20	25
Foreign exchange forwards on certain assets and liabilities	10	0
Restructuring liability	9	21
Treasury lock forward contracts	47	0
Other	119	108
Total accounts payable and accrued liabilities	664	773
Other liabilities:
Pension and other retirement employee benefits	196	299
Interest accrued on UTPs	89	82
MAKS indemnification provisions	41	43
Income tax liability - non-current	51	51
Cross currency and interest rate swaps	1	0
Restructuring liability	3	3
Other	22	26
Total other liabilities	$ 403	$ 504

Other Balance Sheet and State_4

Other Balance Sheet and Statement of Operations Information - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Other Balance Sheet And Statement Of Operations Information [Abstract]
Loss pursuant to the divestiture of MAKS	$ 9	$ 0

Other Balance Sheet and State_5

Other Balance Sheet and Statement of Operations Information - Other Non-Operating Interest (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Other Balance Sheet And Statement Of Operations Information [Abstract]
FX gain (loss)	$ 13	$ (6)
Net periodic pension costs - other components	3	4
Income from investments in non-consolidated affiliates	(3)	1
Other	(1)	3
Total	$ 12	$ 2

Comprehensive Income And Accu_3

Comprehensive Income And Accumulated Other Comprehensive Income - Reclassification out of AOCI (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Other non-operating income, net	$ 12	$ 2
Operating expense	340	342
Selling, general and administrative	301	281
Total before income taxes	564	412
Provision for income taxes	(77)	(38)
Net income	487	374
Reclassification out of Accumulated Other Comprehensive Income
Derivative Instruments, Gain (Loss) [Line Items]
Net income	(2)	0
Losses on cash flow hedges | Reclassification out of Accumulated Other Comprehensive Income
Derivative Instruments, Gain (Loss) [Line Items]
Provision for income taxes	0	0
Net income	(1)	0
Losses on cash flow hedges | Reclassification out of Accumulated Other Comprehensive Income | Interest rate contract
Derivative Instruments, Gain (Loss) [Line Items]
Other non-operating income, net	(1)	0
Total pension and other retirement benefits | Reclassification out of Accumulated Other Comprehensive Income
Derivative Instruments, Gain (Loss) [Line Items]
Total before income taxes	(2)	(1)
Provision for income taxes	1	1
Net income	(1)	0
Amortization of actuarial losses and prior service costs included in net income | Reclassification out of Accumulated Other Comprehensive Income
Derivative Instruments, Gain (Loss) [Line Items]
Operating expense	(1)	(1)
Selling, general and administrative	$ (1)	$ 0

Comprehensive Income And Accu_4

Comprehensive Income And Accumulated Other Comprehensive Income - Changes in Components of Accumulated Other Comprehensive Income (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Jan. 01, 2019
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 612
Other comprehensive income/(loss) before reclassifications	(117)	$ (9)
Amounts reclassified from AOCI	2	0
Other comprehensive income/(loss)	(115)	(29)
Ending balance	582
Pension and Other Retirement Benefits
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(92)	(53)
Other comprehensive income/(loss) before reclassifications	(1)	1
Amounts reclassified from AOCI	1	0
Other comprehensive income/(loss)	0	(16)
Ending balance	(92)	(69)
Cash Flow Hedges
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	0	0
Other comprehensive income/(loss) before reclassifications	(36)	0
Amounts reclassified from AOCI	1	0
Other comprehensive income/(loss)	(35)	0
Ending balance	(35)	0
Foreign Currency Translation Adjustments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(401)	(406)
Other comprehensive income/(loss) before reclassifications	(169)	(34)
Amounts reclassified from AOCI	0	0
Other comprehensive income/(loss)	(169)	(34)
Ending balance	(570)	(440)
Net Investment Hedges
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	54	33
Other comprehensive income/(loss) before reclassifications	89	24
Amounts reclassified from AOCI	0	0
Other comprehensive income/(loss)	89	21
Ending balance	143	54
Total
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(439)	(426)
Ending balance	$ (554)	$ (455)
Accounting Standards Update 2018-02
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Cumulative effect of new accounting principle in period of adoption			$ (20)
Accounting Standards Update 2018-02 | Pension and Other Retirement Benefits
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Cumulative effect of new accounting principle in period of adoption			(17)
Accounting Standards Update 2018-02 | Cash Flow Hedges
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Cumulative effect of new accounting principle in period of adoption			0
Accounting Standards Update 2018-02 | Foreign Currency Translation Adjustments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Cumulative effect of new accounting principle in period of adoption			0
Accounting Standards Update 2018-02 | Net Investment Hedges
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Cumulative effect of new accounting principle in period of adoption			$ (3)

Pension and Other Retirement _3

Pension and Other Retirement Benefits - Components of Net Periodic Benefit Expense Related to Post-Retirement Plans (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Components of net periodic expense
Interest cost	$ 5	$ 5
Pension Plans
Components of net periodic expense
Service cost	5	4
Interest cost	4	5
Expected return on plan assets	(5)	(5)
Amortization of net actuarial loss from earlier periods	2	1
Amortization of net prior service costs from earlier periods	0	0
Net periodic expense	6	5
Other Retirement Plans
Components of net periodic expense
Service cost	1	1
Interest cost	0	0
Expected return on plan assets	0	0
Amortization of net actuarial loss from earlier periods	0	0
Amortization of net prior service costs from earlier periods	0	0
Net periodic expense	$ 1	$ 1

Pension and Other Retirement _4

Pension and Other Retirement Benefits - Additional Information (Detail) $ in Millions	3 Months Ended
	Mar. 31, 2020USD ($)
Other Retirement Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Estimated additional payments in 2020	$ 1
Funded Plan | Pension Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Employer contributions	99
Unfunded Plan | Pension Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined benefit payment amount	3
Estimated additional payments in 2020	$ 3

Indebtedness - Summary of Total

Indebtedness - Summary of Total Indebtedness (Detail) - USD ($)	Mar. 25, 2020	Mar. 31, 2020	Mar. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Principal Amount		$ 6,759,000,000	$ 6,759,000,000	$ 5,603,000,000
Fair Value of Interest Rate Swap		85,000,000	85,000,000	27,000,000
Unamortized (Discount) Premium		(20,000,000)	(20,000,000)	(17,000,000)
Unamortized Debt Issuance Costs		(36,000,000)	(36,000,000)	(32,000,000)
Long term debt		6,303,000,000	6,303,000,000	$ 5,581,000,000
Short-term debt		485,000,000	485,000,000
Total debt		6,788,000,000	6,788,000,000
Commercial Paper
Debt Instrument [Line Items]
Principal Amount		487,000,000	487,000,000
Unamortized (Discount) Premium		(2,000,000)	(2,000,000)
Short-term debt		$ 485,000,000	$ 485,000,000
4.50% 2012 Senior Notes, due 2022
Debt Instrument [Line Items]
Notes payable, interest rate		4.50%	4.50%	4.50%
Principal Amount		$ 500,000,000	$ 500,000,000	$ 500,000,000
Fair Value of Interest Rate Swap		18,000,000	18,000,000	9,000,000
Unamortized (Discount) Premium		(1,000,000)	(1,000,000)	(1,000,000)
Unamortized Debt Issuance Costs		(1,000,000)	(1,000,000)	(1,000,000)
Long term debt		$ 516,000,000	$ 516,000,000	$ 507,000,000
4.875% 2013 Senior Notes, due 2024
Debt Instrument [Line Items]
Notes payable, interest rate		4.875%	4.875%	4.875%
Principal Amount		$ 500,000,000	$ 500,000,000	$ 500,000,000
Unamortized (Discount) Premium		(1,000,000)	(1,000,000)	(1,000,000)
Unamortized Debt Issuance Costs		(1,000,000)	(1,000,000)	(2,000,000)
Long term debt		$ 498,000,000	$ 498,000,000	$ 497,000,000
5.25% 2014 Senior Notes (30-Year), due 2044
Debt Instrument [Line Items]
Notes payable, interest rate		5.25%	5.25%	5.25%
Debt instrument, term			30 years	30 years
Principal Amount		$ 600,000,000	$ 600,000,000	$ 600,000,000
Unamortized (Discount) Premium		3,000,000	3,000,000	4,000,000
Unamortized Debt Issuance Costs		(5,000,000)	(5,000,000)	(5,000,000)
Long term debt		$ 598,000,000	$ 598,000,000	$ 599,000,000
1.75% 2015 Senior Notes, due 2027
Debt Instrument [Line Items]
Notes payable, interest rate		1.75%	1.75%	1.75%
Principal Amount		$ 549,000,000	$ 549,000,000	$ 561,000,000
Unamortized (Discount) Premium		0	0	0
Unamortized Debt Issuance Costs		(3,000,000)	(3,000,000)	(3,000,000)
Long term debt		$ 546,000,000	$ 546,000,000	$ 558,000,000
2.75% 2017 Senior Notes, due 2021
Debt Instrument [Line Items]
Notes payable, interest rate		2.75%	2.75%	2.75%
Principal Amount		$ 500,000,000	$ 500,000,000	$ 500,000,000
Fair Value of Interest Rate Swap		21,000,000	21,000,000	11,000,000
Unamortized (Discount) Premium		0	0	(1,000,000)
Unamortized Debt Issuance Costs		(1,000,000)	(1,000,000)	(2,000,000)
Long term debt		$ 520,000,000	$ 520,000,000	$ 508,000,000
2.625% 2017 Senior Notes, due 2023
Debt Instrument [Line Items]
Notes payable, interest rate		2.625%	2.625%	2.625%
Principal Amount		$ 500,000,000	$ 500,000,000	$ 500,000,000
Fair Value of Interest Rate Swap		15,000,000	15,000,000	7,000,000
Unamortized (Discount) Premium		(1,000,000)	(1,000,000)	(1,000,000)
Unamortized Debt Issuance Costs		(2,000,000)	(2,000,000)	(2,000,000)
Long term debt		$ 512,000,000	$ 512,000,000	$ 504,000,000
3.25% 2017 Senior Notes, due 2028
Debt Instrument [Line Items]
Notes payable, interest rate		3.25%	3.25%	3.25%
Principal Amount		$ 500,000,000	$ 500,000,000	$ 500,000,000
Fair Value of Interest Rate Swap		31,000,000	31,000,000
Unamortized (Discount) Premium		(4,000,000)	(4,000,000)	(4,000,000)
Unamortized Debt Issuance Costs		(3,000,000)	(3,000,000)	(3,000,000)
Long term debt		$ 524,000,000	$ 524,000,000	$ 493,000,000
3.25% 2018 Senior Notes, due 2021
Debt Instrument [Line Items]
Notes payable, interest rate		3.25%	3.25%	3.25%
Principal Amount		$ 300,000,000	$ 300,000,000	$ 300,000,000
Fair Value of Interest Rate Swap		0	0
Unamortized (Discount) Premium		0	0	0
Unamortized Debt Issuance Costs		(1,000,000)	(1,000,000)	(1,000,000)
Long term debt		$ 299,000,000	$ 299,000,000	$ 299,000,000
4.25% 2018 Senior Notes, due 2029
Debt Instrument [Line Items]
Notes payable, interest rate		4.25%	4.25%	4.25%
Principal Amount		$ 400,000,000	$ 400,000,000	$ 400,000,000
Unamortized (Discount) Premium		(3,000,000)	(3,000,000)	(3,000,000)
Unamortized Debt Issuance Costs		(3,000,000)	(3,000,000)	(3,000,000)
Long term debt		$ 394,000,000	$ 394,000,000	$ 394,000,000
4.875% 2018 Senior Notes, due 2048
Debt Instrument [Line Items]
Notes payable, interest rate		4.875%	4.875%	4.875%
Principal Amount		$ 400,000,000	$ 400,000,000	$ 400,000,000
Unamortized (Discount) Premium		(7,000,000)	(7,000,000)	(7,000,000)
Unamortized Debt Issuance Costs		(4,000,000)	(4,000,000)	(4,000,000)
Long term debt		$ 389,000,000	$ 389,000,000	$ 389,000,000
0.950% Senior Notes Due 2030
Debt Instrument [Line Items]
Notes payable, interest rate		0.95%	0.95%	0.95%
Principal Amount		$ 823,000,000	$ 823,000,000	$ 842,000,000
Unamortized (Discount) Premium		(3,000,000)	(3,000,000)	(3,000,000)
Unamortized Debt Issuance Costs		(6,000,000)	(6,000,000)	(6,000,000)
Long term debt		$ 814,000,000	$ 814,000,000	$ 833,000,000
3.75% 2020 Senior Note, due 2025
Debt Instrument [Line Items]
Notes payable, interest rate	3.75%	3.75%	3.75%
Debt instrument, term	5 years	5 years
Principal Amount	$ 700,000,000	$ 700,000,000	$ 700,000,000
Unamortized (Discount) Premium		(1,000,000)	(1,000,000)
Unamortized Debt Issuance Costs		(6,000,000)	(6,000,000)
Long term debt		$ 693,000,000	$ 693,000,000

Indebtedness - Additional Infor

Indebtedness - Additional Information (Detail) - USD ($)	Mar. 31, 2020	Mar. 25, 2020	Mar. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Short-term debt	$ 485,000,000		$ 485,000,000
Principal amount	6,759,000,000		6,759,000,000	$ 5,603,000,000
3.75% 2020 Senior Note, due 2025
Debt Instrument [Line Items]
Principal amount	$ 700,000,000	$ 700,000,000	$ 700,000,000
Debt instrument, term		5 years	5 years
Notes payable, interest rate	3.75%	3.75%	3.75%
Commercial Paper
Debt Instrument [Line Items]
Short-term debt	$ 485,000,000		$ 485,000,000
Weighted average maturity at issuance date	77 days
Weighted average remaining maturity period	58 days
Weighted average interest rate	2.38%		2.38%
Principal amount	$ 487,000,000		$ 487,000,000

Indebtedness - Principal Paymen

Indebtedness - Principal Payments Due on Long-Term Borrowings (Detail) - USD ($)	Mar. 25, 2020	Mar. 31, 2020	Mar. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
2020 (After March 31,)		$ 487,000,000	$ 487,000,000
2021		800,000,000	800,000,000
2022		500,000,000	500,000,000
2023		500,000,000	500,000,000
2024		500,000,000	500,000,000
Thereafter		3,972,000,000	3,972,000,000
Total principal payment		6,759,000,000	6,759,000,000	$ 5,603,000,000
4.50% 2012 Senior Notes, due 2022
Debt Instrument [Line Items]
2022		500,000,000	500,000,000
Total principal payment		500,000,000	500,000,000	500,000,000
4.875% 2013 Senior Notes, due 2024
Debt Instrument [Line Items]
2024		500,000,000	500,000,000
Total principal payment		500,000,000	500,000,000	500,000,000
5.25% 2014 Senior Notes (30-Year), due 2044
Debt Instrument [Line Items]
Thereafter		600,000,000	600,000,000
Total principal payment		600,000,000	$ 600,000,000	$ 600,000,000
Debt instrument, term			30 years	30 years
1.75% 2015 Senior Notes, due 2027
Debt Instrument [Line Items]
Thereafter		549,000,000	$ 549,000,000
Total principal payment		549,000,000	549,000,000	$ 561,000,000
2.75% 2017 Senior Notes, due 2021
Debt Instrument [Line Items]
2021		500,000,000	500,000,000
Total principal payment		500,000,000	500,000,000	500,000,000
2.625% 2017 Senior Notes, due 2023
Debt Instrument [Line Items]
2023		500,000,000	500,000,000
Total principal payment		500,000,000	500,000,000	500,000,000
3.25% 2017 Senior Notes, due 2028
Debt Instrument [Line Items]
Thereafter		500,000,000	500,000,000
Total principal payment		500,000,000	500,000,000	500,000,000
3.25% 2018 Senior Notes, due 2021
Debt Instrument [Line Items]
2021		300,000,000	300,000,000
Total principal payment		300,000,000	300,000,000	300,000,000
4.25% 2018 Senior Notes, due 2029
Debt Instrument [Line Items]
Thereafter		400,000,000	400,000,000
Total principal payment		400,000,000	400,000,000	400,000,000
4.875% 2018 Senior Notes, due 2048
Debt Instrument [Line Items]
Thereafter		400,000,000	400,000,000
Total principal payment		400,000,000	400,000,000	400,000,000
0.950% Senior Notes Due 2030
Debt Instrument [Line Items]
Thereafter		823,000,000	823,000,000
Total principal payment		823,000,000	823,000,000	$ 842,000,000
3.75% 2020 Senior Note, due 2025
Debt Instrument [Line Items]
Thereafter		700,000,000	700,000,000
Total principal payment	$ 700,000,000	$ 700,000,000	700,000,000
Debt instrument, term	5 years	5 years
Commercial Paper
Debt Instrument [Line Items]
2020 (After March 31,)		$ 487,000,000	487,000,000
Total principal payment		$ 487,000,000	$ 487,000,000

Indebtedness - Summary of Compo

Indebtedness - Summary of Components of Interest as Presented in Consolidated Statements of Operations (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Debt Disclosure [Abstract]
Income	$ 4	$ 5
Expense on borrowings	(31)	(46)
UTPs and other tax related liabilities	(8)	(6)
Net periodic pension costs - interest component	(5)	(5)
Total	$ (40)	$ (52)

Indebtedness - Interest Paid (D

Indebtedness - Interest Paid (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Debt Disclosure [Abstract]
Interest paid	$ 49	$ 73

Indebtedness - Fair Value and C

Indebtedness - Fair Value and Carrying Value of Long-Term Debt (Detail) - USD ($) $ in Millions	Mar. 25, 2020	Mar. 31, 2020	Mar. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Carrying Amount		$ 6,303	$ 6,303	$ 5,581
Estimated Fair Value		6,584	6,584	6,078
4.50% 2012 Senior Notes, due 2022
Debt Instrument [Line Items]
Carrying Amount		516	516	507
Estimated Fair Value		$ 521	$ 521	$ 531
Notes payable, interest rate		4.50%	4.50%	4.50%
4.875% 2013 Senior Notes, due 2024
Debt Instrument [Line Items]
Carrying Amount		$ 498	$ 498	$ 497
Estimated Fair Value		$ 536	$ 536	$ 551
Notes payable, interest rate		4.875%	4.875%	4.875%
5.25% 2014 Senior Notes (30-Year), due 2044
Debt Instrument [Line Items]
Carrying Amount		$ 598	$ 598	$ 599
Estimated Fair Value		$ 738	$ 738	$ 757
Notes payable, interest rate		5.25%	5.25%	5.25%
Debt instrument, term			30 years	30 years
1.75% 2015 Senior Notes, due 2027
Debt Instrument [Line Items]
Carrying Amount		$ 546	$ 546	$ 558
Estimated Fair Value		$ 577	$ 577	$ 604
Notes payable, interest rate		1.75%	1.75%	1.75%
2.75% 2017 Senior Notes, due 2021
Debt Instrument [Line Items]
Carrying Amount		$ 520	$ 520	$ 508
Estimated Fair Value		$ 497	$ 497	$ 507
Notes payable, interest rate		2.75%	2.75%	2.75%
2.625% 2017 Senior Notes, due 2023
Debt Instrument [Line Items]
Carrying Amount		$ 512	$ 512	$ 504
Estimated Fair Value		$ 496	$ 496	$ 507
Notes payable, interest rate		2.625%	2.625%	2.625%
3.25% 2017 Senior Notes, due 2028
Debt Instrument [Line Items]
Carrying Amount		$ 524	$ 524	$ 493
Estimated Fair Value		$ 509	$ 509	$ 523
Notes payable, interest rate		3.25%	3.25%	3.25%
3.25% 2018 Senior Notes, due 2021
Debt Instrument [Line Items]
Carrying Amount		$ 299	$ 299	$ 299
Estimated Fair Value		$ 301	$ 301	$ 306
Notes payable, interest rate		3.25%	3.25%	3.25%
4.25% 2018 Senior Notes, due 2029
Debt Instrument [Line Items]
Carrying Amount		$ 394	$ 394	$ 394
Estimated Fair Value		$ 445	$ 445	$ 453
Notes payable, interest rate		4.25%	4.25%	4.25%
4.875% 2018 Senior Notes, due 2048
Debt Instrument [Line Items]
Carrying Amount		$ 389	$ 389	$ 389
Estimated Fair Value		$ 463	$ 463	$ 492
Notes payable, interest rate		4.875%	4.875%	4.875%
0.950% Senior Notes Due 2030
Debt Instrument [Line Items]
Carrying Amount		$ 814	$ 814	$ 833
Estimated Fair Value		$ 769	$ 769	$ 847
Notes payable, interest rate		0.95%	0.95%	0.95%
3.75% 2020 Senior Note, due 2025
Debt Instrument [Line Items]
Carrying Amount		$ 693	$ 693
Estimated Fair Value		$ 732	$ 732
Notes payable, interest rate	3.75%	3.75%	3.75%
Debt instrument, term	5 years	5 years

Leases - Additional Information

Leases - Additional Information (Detail)	Mar. 31, 2020
Minimum
Operating Leased Assets [Line Items]
Lessee, operating lease, renewal term (years)	1 year
Maximum
Operating Leased Assets [Line Items]
Lessee, operating lease, renewal term (years)	20 years

Leases - Components of Lease Co

Leases - Components of Lease Cost (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Lease, Cost [Abstract]
Operating lease cost	$ 24	$ 25
Sublease Income	(1)	0
Variable lease cost	5	4
Total lease cost	$ 28	$ 29

Leases - Operating Leases Infor

Leases - Operating Leases Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Leases [Abstract]
Cash paid for amounts included in the measurement of operating lease liabilities	$ 26	$ 26
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 9	$ 9
Weighted-average remaining lease term (years)	6 years 8 months 12 days	7 years 3 months 18 days
Weighted-average discount rate applied to operating leases (percent)	3.60%	3.60%

Leases - Operating Leases, Futu

Leases - Operating Leases, Future Minimum Payment (Detail) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Leases [Abstract]
2020 (After March 31)	$ 80
2021	103
2022	90
2023	84
2024	78
After 2024	186
Total lease payments (undiscounted)	621
Less: Interest	69
Present value of lease liabilities:	552
Lease liabilities - current	89	$ 89
Lease liabilities - noncurrent	$ 463	$ 485

Segment Information - Additiona

Segment Information - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2020segmentlineOfBusiness
Segment Reporting Information [Line Items]
Number of operating segments (segment) | segment	2
Number of reportable segments | segment	2
MIS
Segment Reporting Information [Line Items]
Number of lines of businesses | lineOfBusiness	5
MA
Segment Reporting Information [Line Items]
Number of lines of businesses | lineOfBusiness	2

Segment Information - Financial

Segment Information - Financial Information by Segment (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Segment Reporting Information, Operating Income (Loss) [Abstract]
Revenue	$ 1,290	$ 1,142
Total Expense	698	680
Operating income	592	462
Restructuring	(1)	6
Depreciation and amortization	49	50
Acquisition-Related Expenses	0	1
Loss pursuant to the divestiture of MAKS	9	0
Adjusted Operating Income	649	519
Eliminations
Segment Reporting Information, Operating Income (Loss) [Abstract]
Revenue	(39)	(34)
Total Expense	(39)	(34)
Operating income	0	0
Restructuring	0	0
Depreciation and amortization	0	0
Acquisition-Related Expenses	0	0
Loss pursuant to the divestiture of MAKS	0	0
Adjusted Operating Income	0	0
MIS
Segment Reporting Information, Operating Income (Loss) [Abstract]
Revenue	794	670
MIS | Operating Segments
Segment Reporting Information, Operating Income (Loss) [Abstract]
Revenue	831	702
Total Expense	343	336
Operating income	488	366
Restructuring	(1)	3
Depreciation and amortization	16	17
Acquisition-Related Expenses	0	0
Loss pursuant to the divestiture of MAKS	0	0
Adjusted Operating Income	503	386
MA
Segment Reporting Information, Operating Income (Loss) [Abstract]
Revenue	496	472
MA | Operating Segments
Segment Reporting Information, Operating Income (Loss) [Abstract]
Revenue	498	474
Total Expense	394	378
Operating income	104	96
Restructuring	0	3
Depreciation and amortization	33	33
Acquisition-Related Expenses	0	1
Loss pursuant to the divestiture of MAKS	9	0
Adjusted Operating Income	$ 146	$ 133

Segment Information - Consolida

Segment Information - Consolidated Revenue Information by Geographic Area (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Segment Reporting Information [Line Items]
Revenue	$ 1,290	$ 1,142
United States
Segment Reporting Information [Line Items]
Revenue	714	612
Non-U.S.
Segment Reporting Information [Line Items]
Revenue	576	530
EMEA
Segment Reporting Information [Line Items]
Revenue	363	333
Asia-Pacific
Segment Reporting Information [Line Items]
Revenue	136	132
Americas
Segment Reporting Information [Line Items]
Revenue	$ 77	$ 65

Subsequent Events - Additional

Subsequent Events - Additional Information (Detail) - Subsequent Event	Apr. 20, 2020$ / shares
Subsequent Event [Line Items]
Dividend declared, declaration date	Apr. 20, 2020
Dividend declared, per share (in USD per share)	$ 0.56
Dividend declared, payable date	Jun. 10, 2020
Dividend declared, record date	May 20, 2020

Uncategorized Items - mco-20200

Label	Element	Value
Accounting Standards Update 2016-13 [Member] | Parent [Member]
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets	us-gaap_NewAccountingPronouncementOrChangeInAccountingPrincipleCumulativeEffectOfChangeOnEquityOrNetAssets1	$ (2,000,000)
Accounting Standards Update 2018-02 [Member]
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets	us-gaap_NewAccountingPronouncementOrChangeInAccountingPrincipleCumulativeEffectOfChangeOnEquityOrNetAssets1	0
Accounting Standards Update 2018-02 [Member] | Parent [Member]
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets	us-gaap_NewAccountingPronouncementOrChangeInAccountingPrincipleCumulativeEffectOfChangeOnEquityOrNetAssets1	0
Accounting Standards Update 2018-02 [Member] | AOCI Attributable to Parent [Member]
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets	us-gaap_NewAccountingPronouncementOrChangeInAccountingPrincipleCumulativeEffectOfChangeOnEquityOrNetAssets1	(20,000,000)
Accounting Standards Update 2018-02 [Member] | Retained Earnings [Member]
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets	us-gaap_NewAccountingPronouncementOrChangeInAccountingPrincipleCumulativeEffectOfChangeOnEquityOrNetAssets1	$ 20,000,000