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v3.25.1

Revenues - Revenues Disaggregated by Line of Business and Geographical Area (Detail) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2025 | Mar. 31, 2024
Disaggregation of Revenue [Line Items] |  |
Revenue | $ 1,924 | $ 1,786
United States |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 1,065 | 969
Non-U.S. |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 859 | 817
MA |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 859 | 799
MA | Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 862 | 802
MA | United States |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 375 | 337
MA | United States | Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 375 | 337
MA | Non-U.S. |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 484 | 462
MA | Non-U.S. | Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 484 | 462
MA | Decision Solutions (DS) |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 405 | 365
MA | Decision Solutions (DS) | Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 405 | 365
MA | Decision Solutions (DS) | United States |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 167 | 138
MA | Decision Solutions (DS) | Non-U.S. |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 238 | 227
MA | Research and Insights (R&I) |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 236 | 222
MA | Research and Insights (R&I) | Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 236 | 222
MA | Research and Insights (R&I) | United States |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 128 | 122
MA | Research and Insights (R&I) | Non-U.S. |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 108 | 100
MA | Data and Information (D&I) |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 218 | 212
MA | Data and Information (D&I) | Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 218 | 212
MA | Data and Information (D&I) | United States |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 80 | 77
MA | Data and Information (D&I) | Non-U.S. |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 138 | 135
MIS |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 1,065 | 987
MIS | Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 1,114 | 1,034
MIS | United States |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 690 | 632
MIS | United States | Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 690 | 632
MIS | Non-U.S. |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 375 | 355
MIS | Non-U.S. | Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 375 | 355
MIS | Corporate Finance (CFG) |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 564 | 529
MIS | Corporate Finance (CFG) | Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 564 | 529
MIS | Corporate Finance (CFG) | United States |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 391 | 372
MIS | Corporate Finance (CFG) | Non-U.S. |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 173 | 157
MIS | Structured Finance (SFG) |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 138 | 114
MIS | Structured Finance (SFG) | Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 138 | 114
MIS | Structured Finance (SFG) | United States |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 100 | 76
MIS | Structured Finance (SFG) | Non-U.S. |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 38 | 38
MIS | Financial Institutions (FIG) |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 191 | 195
MIS | Financial Institutions (FIG) | Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 191 | 195
MIS | Financial Institutions (FIG) | United States |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 95 | 98
MIS | Financial Institutions (FIG) | Non-U.S. |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 96 | 97
MIS | Public, Project and Infrastructure Finance (PPIF) |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 163 | 141
MIS | Public, Project and Infrastructure Finance (PPIF) | Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 163 | 141
MIS | Public, Project and Infrastructure Finance (PPIF) | United States |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 104 | 86
MIS | Public, Project and Infrastructure Finance (PPIF) | Non-U.S. |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 59 | 55
MIS | Total ratings revenue |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 1,056 | 979
MIS | Total ratings revenue | Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 1,056 | 979
MIS | Total ratings revenue | United States |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 690 | 632
MIS | Total ratings revenue | Non-U.S. |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 366 | 347
MIS | MIS Other |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 9 | 8
MIS | MIS Other | Operating Segments |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 9 | 8
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 | $ 9 | $ 8

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