DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION	9 Months Ended
DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION	Sep. 30, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION	DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION Moody’s is a global risk assessment firm that empowers organizations and investors to make better decisions. Moody’s reports in two reportable segments: MA and MIS. MA is a global provider of: i) data and information; ii) research and insights; and iii) decision solutions, which help companies make better and faster decisions. MA leverages its industry expertise across multiple risks such as credit, market, financial crime, supply chain, catastrophe and climate to deliver risk assessment solutions that enable business leaders to identify, measure and manage the implications of interrelated risks and opportunities. MIS publishes credit ratings and provides assessment services on a wide range of debt obligations, programs and facilities, and the entities that issue such obligations in markets worldwide, including various corporate, financial institution and governmental obligations, and structured finance securities. 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 2022 annual report on Form 10-K filed with the SEC on February 15, 2023. 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 GAAP. Certain reclassifications have been made to prior period amounts to conform to the current presentation. Adoption of New Accounting Standards in 2023 In January 2021, the FASB issued ASU 2021-01, “Reference Rate Reform - Scope,” which clarified the scope and application of the original guidance, ASU No. 2020-04, "Facilitation of the Effects of Reference Rate Reform on Financial Reporting" ("ASU No. 2020-04"), issued in March 2020 (codified into ASC Topic 848 "Reference Rate Reform"). ASU No. 2020-04 provides temporary optional expedients and exceptions to the GAAP guidance on contract modifications and hedge accounting to ease the financial reporting burdens related to the expected market transition from LIBOR and other interbank offered rates to alternative reference rates. In December 2022, the FASB issued ASU 2022-06, "Reference Rate Reform—Deferral of the Sunset Date of Topic 848," which deferred the sunset date of Topic 848 to December 31, 2024. These ASU's were effective upon issuance and the amendments may be applied prospectively through December 31, 2024 as the transition from LIBOR is completed. During the first quarter of 2023, the Company modified the contractual terms of certain of its interest rate swaps designated as fair value hedges and cross-currency swaps designated as net investment hedges. These modifications replaced the previous LIBOR/EURIBOR-based reference rates included in the swap agreements to SOFR/ESTR-based rates. Pursuant to the modification of the contractual terms of these instruments, the Company utilized the optional expedients set forth in ASC Topic 848 relating to derivative instruments used in hedging relationships. The aggregate notional amounts of these swaps is disclosed in Note 8. Reclassification of Previously Reported Revenue by LOB In the second quarter of 2023, the Company expanded its disaggregation of revenue disclosures for MA's Decision Solutions LOB to enhance insight and transparency into this business. In conjunction with this new presentation, the Company reclassified certain immaterial revenue relating to structured finance solutions from the Decision Solutions LOB to the Research & Insights LOB. Prior year revenue by LOB disclosures have been reclassified to conform to this new presentation, which is disclosed in Note 2.