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Revenues - Schedule of Changes in the Deferred Revenue Balances (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Change in Contract with Customer, Liability [Abstract]      
Beginning Balance $ 1,381 $ 1,333 $ 1,335
Revenue recognized that was included in the deferred revenue balance at the beginning of the period (1,253) (1,191) (1,206)
Increases due to amounts billable excluding amounts recognized as revenue during the period 1,411 1,215 1,220
Increases due to acquisitions during the period 9   1
Effect of exchange rate changes (37) 24 (17)
Total changes in deferred revenue 130 48 (2)
Ending Balance 1,511 1,381 1,333
Deferred revenue - current 1,454 1,316 1,258
Deferred revenue - non-current 57 65 75
MA      
Change in Contract with Customer, Liability [Abstract]      
Beginning Balance 1,111 1,055 1,039
Revenue recognized that was included in the deferred revenue balance at the beginning of the period (1,044) (980) (996)
Increases due to amounts billable excluding amounts recognized as revenue during the period 1,200 1,015 1,018
Increases due to acquisitions during the period 9   1
Effect of exchange rate changes (33) 21 (7)
Total changes in deferred revenue 132 56 16
Ending Balance 1,243 1,111 1,055
Deferred revenue - current 1,243 1,109 1,053
Deferred revenue - non-current 0 2 2
MIS      
Change in Contract with Customer, Liability [Abstract]      
Beginning Balance 270 278 296
Revenue recognized that was included in the deferred revenue balance at the beginning of the period (209) (211) (210)
Increases due to amounts billable excluding amounts recognized as revenue during the period 211 200 202
Increases due to acquisitions during the period 0   0
Effect of exchange rate changes (4) 3 (10)
Total changes in deferred revenue (2) (8) (18)
Ending Balance 268 270 278
Deferred revenue - current 211 207 205
Deferred revenue - non-current $ 57 $ 63 $ 73