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Revenues - Schedule of Changes in the Deferred Revenue Balances (Detail) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024 | Dec. 31, 2024
Change in Contract with Customer, Liability [Abstract] |  |  |  |  |
Beginning Balance | $ 1,635 | $ 1,482 | $ 1,511 | $ 1,381 |
Revenue recognized that was included in the deferred revenue balance at the beginning of the period | (735) | (671) | (1,279) | (1,147) |
Increases due to amounts billable excluding amounts recognized as revenue during the period | 578 | 502 | 1,149 | 1,098 |
Reclassification to liabilities held-for-sale | (23) | 0 | (23) | 0 |
Increases due to acquisitions during the period | 0 | 5 | 15 | 5 |
Effect of exchange rate changes | (28) | 41 | 54 | 22 |
Total changes in deferred revenue | (208) | (123) | (84) | (22) |
Ending Balance | 1,427 | 1,359 | 1,427 | 1,359 |
Deferred revenue | 1,369 | 1,300 | 1,369 | 1,300 | $ 1,454
Non-current portion of deferred revenue | 58 | 59 | 58 | 59 | $ 57
MA |  |  |  |  |
Change in Contract with Customer, Liability [Abstract] |  |  |  |  |
Beginning Balance | 1,285 | 1,146 | 1,243 | 1,111 |
Revenue recognized that was included in the deferred revenue balance at the beginning of the period | (612) | (551) | (1,074) | (950) |
Increases due to amounts billable excluding amounts recognized as revenue during the period | 491 | 410 | 910 | 860 |
Reclassification to liabilities held-for-sale | (23) | 0 | (23) | 0 |
Increases due to acquisitions during the period | 0 | 5 | 15 | 5 |
Effect of exchange rate changes | (27) | 37 | 43 | 21 |
Total changes in deferred revenue | (171) | (99) | (129) | (64) |
Ending Balance | 1,114 | 1,047 | 1,114 | 1,047 |
Deferred revenue | 1,113 | 1,047 | 1,113 | 1,047 |
Non-current portion of deferred revenue | 1 | 0 | 1 | 0 |
MIS |  |  |  |  |
Change in Contract with Customer, Liability [Abstract] |  |  |  |  |
Beginning Balance | 350 | 336 | 268 | 270 |
Revenue recognized that was included in the deferred revenue balance at the beginning of the period | (123) | (120) | (205) | (197) |
Increases due to amounts billable excluding amounts recognized as revenue during the period | 87 | 92 | 239 | 238 |
Reclassification to liabilities held-for-sale | 0 | 0 | 0 | 0 |
Increases due to acquisitions during the period | 0 |  |  | 0 |
Effect of exchange rate changes | (1) | 4 | 11 | 1 |
Total changes in deferred revenue | (37) | (24) | 45 | 42 |
Ending Balance | 313 | 312 | 313 | 312 |
Deferred revenue | 256 | 253 | 256 | 253 |
Non-current portion of deferred revenue | $ 57 | $ 59 | $ 57 | $ 59 |

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