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Revenues - Transaction and Relationship Revenue (Detail) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 1,813 | $ 1,472 | $ 5,416 | $ 4,436
Percentage of revenues | 100.00% | 100.00% | 100.00% | 100.00%
Transaction Revenue |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 701 | $ 437 | $ 2,151 | $ 1,403
Percentage of revenues | 39.00% | 30.00% | 40.00% | 32.00%
Recurring Revenue |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 1,112 | $ 1,035 | $ 3,265 | $ 3,033
Percentage of revenues | 61.00% | 70.00% | 60.00% | 68.00%
MA |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 831 | $ 776 | $ 2,432 | $ 2,260
MA | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 834 | $ 779 | $ 2,442 | $ 2,270
Percentage of revenues | 100.00% | 100.00% | 100.00% | 100.00%
MA | Decision Solutions (DS) |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 383 | $ 354 |  |
MA | Decision Solutions (DS) | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 383 | $ 354 | $ 1,114 | $ 1,022
Percentage of revenues | 100.00% | 100.00% | 100.00% | 100.00%
MA | Research and Insights (R&I) |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 235 | $ 222 |  |
MA | Research and Insights (R&I) | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 235 | $ 222 | $ 683 | $ 654
Percentage of revenues | 100.00% | 100.00% | 100.00% | 100.00%
MA | Data and Information (D&I) |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 213 | $ 200 |  |
MA | Data and Information (D&I) | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 213 | $ 200 | $ 635 | $ 584
Percentage of revenues | 100.00% | 100.00% | 100.00% | 100.00%
MA | Transaction Revenue |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 38 | $ 48 | $ 119 | $ 140
MA | Transaction Revenue | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Percentage of revenues | 5.00% | 6.00% | 5.00% | 6.00%
MA | Transaction Revenue | Decision Solutions (DS) | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 33 | $ 43 | $ 105 | $ 126
Percentage of revenues | 9.00% | 12.00% | 9.00% | 12.00%
MA | Transaction Revenue | Research and Insights (R&I) | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 4 | $ 4 | $ 11 | $ 12
Percentage of revenues | 2.00% | 2.00% | 2.00% | 2.00%
MA | Transaction Revenue | Data and Information (D&I) | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 1 | $ 1 | $ 3 | $ 2
Percentage of revenues | 0.00% | 1.00% | 0.00% | 0.00%
MA | Recurring Revenue |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 793 | $ 728 | $ 2,313 | $ 2,120
MA | Recurring Revenue | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Percentage of revenues | 95.00% | 94.00% | 95.00% | 94.00%
MA | Recurring Revenue | Decision Solutions (DS) | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 350 | $ 311 | $ 1,009 | $ 896
Percentage of revenues | 91.00% | 88.00% | 91.00% | 88.00%
MA | Recurring Revenue | Research and Insights (R&I) | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 231 | $ 218 | $ 672 | $ 642
Percentage of revenues | 98.00% | 98.00% | 98.00% | 98.00%
MA | Recurring Revenue | Data and Information (D&I) | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 212 | $ 199 | $ 632 | $ 582
Percentage of revenues | 100.00% | 99.00% | 100.00% | 100.00%
MIS |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 982 | $ 696 | $ 2,984 | $ 2,176
MIS | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 1,030 | $ 743 | $ 3,128 | $ 2,314
Percentage of revenues | 100.00% | 100.00% | 100.00% | 100.00%
MIS | Corporate Finance (CFG) |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 515 | $ 346 |  |
MIS | Corporate Finance (CFG) | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 515 | $ 346 | $ 1,569 | $ 1,067
Percentage of revenues | 100.00% | 100.00% | 100.00% | 100.00%
MIS | Structured Finance (SFG) |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 135 | $ 102 |  |
MIS | Structured Finance (SFG) | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 135 | $ 102 | $ 380 | $ 303
Percentage of revenues | 100.00% | 100.00% | 100.00% | 100.00%
MIS | Financial Institutions (FIG) |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 170 | $ 126 |  |
MIS | Financial Institutions (FIG) | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 170 | $ 126 | $ 560 | $ 413
Percentage of revenues | 100.00% | 100.00% | 100.00% | 100.00%
MIS | Public, Project and Infrastructure Finance (PPIF) |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 154 | $ 115 |  |
MIS | Public, Project and Infrastructure Finance (PPIF) | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 154 | $ 115 | $ 449 | $ 371
Percentage of revenues | 100.00% | 100.00% | 100.00% | 100.00%
MIS | MIS Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 8 | $ 7 |  |
MIS | MIS Other | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 8 | $ 7 | $ 26 | $ 22
Percentage of revenues | 100.00% | 100.00% | 100.00% | 100.00%
MIS | Transaction Revenue |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 663 | $ 389 | $ 2,032 | $ 1,263
MIS | Transaction Revenue | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Percentage of revenues | 68.00% | 56.00% | 68.00% | 58.00%
MIS | Transaction Revenue | Corporate Finance (CFG) | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 382 | $ 216 | $ 1,169 | $ 682
Percentage of revenues | 74.00% | 62.00% | 75.00% | 64.00%
MIS | Transaction Revenue | Structured Finance (SFG) | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 78 | $ 49 | $ 213 | $ 142
Percentage of revenues | 58.00% | 48.00% | 56.00% | 47.00%
MIS | Transaction Revenue | Financial Institutions (FIG) | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 92 | $ 52 | $ 329 | $ 195
Percentage of revenues | 54.00% | 41.00% | 59.00% | 47.00%
MIS | Transaction Revenue | Public, Project and Infrastructure Finance (PPIF) | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 109 | $ 70 | $ 315 | $ 240
Percentage of revenues | 71.00% | 61.00% | 70.00% | 65.00%
MIS | Transaction Revenue | MIS Other | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 2 | $ 2 | $ 6 | $ 4
Percentage of revenues | 25.00% | 29.00% | 23.00% | 18.00%
MIS | Recurring Revenue |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 319 | $ 307 | $ 952 | $ 913
MIS | Recurring Revenue | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Percentage of revenues | 32.00% | 44.00% | 32.00% | 42.00%
MIS | Recurring Revenue | Corporate Finance (CFG) | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 133 | $ 130 | $ 400 | $ 385
Percentage of revenues | 26.00% | 38.00% | 25.00% | 36.00%
MIS | Recurring Revenue | Structured Finance (SFG) | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 57 | $ 53 | $ 167 | $ 161
Percentage of revenues | 42.00% | 52.00% | 44.00% | 53.00%
MIS | Recurring Revenue | Financial Institutions (FIG) | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 78 | $ 74 | $ 231 | $ 218
Percentage of revenues | 46.00% | 59.00% | 41.00% | 53.00%
MIS | Recurring Revenue | Public, Project and Infrastructure Finance (PPIF) | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 45 | $ 45 | $ 134 | $ 131
Percentage of revenues | 29.00% | 39.00% | 30.00% | 35.00%
MIS | Recurring Revenue | MIS Other | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 6 | $ 5 | $ 20 | $ 18
Percentage of revenues | 75.00% | 71.00% | 77.00% | 82.00%

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