Revenues - Schedule of Changes in the Deferred Revenue Balances (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Change in Contract with Customer, Liability [Abstract]
Beginning Balance	$ 1,335	$ 1,187
Revenue recognized that was included in the deferred revenue balance at the beginning of the period	(526)	(482)
Increases due to amounts billable excluding amounts recognized as revenue during the period	814	626
Increases due to acquisitions during the period	1	4
Effect of exchange rate changes	(13)	(7)
Total changes in deferred revenue	276	141
Ending Balance	1,611	1,328
Deferred revenue - current	1,525	1,232	$ 1,249
Deferred revenue - non-current	86	96	$ 86
MIS
Change in Contract with Customer, Liability [Abstract]
Beginning Balance	296	313
Revenue recognized that was included in the deferred revenue balance at the beginning of the period	(95)	(96)
Increases due to amounts billable excluding amounts recognized as revenue during the period	178	174
Increases due to acquisitions during the period	0	0
Effect of exchange rate changes	(2)	(3)
Total changes in deferred revenue	81	75
Ending Balance	377	388
Deferred revenue - current	294	295
Deferred revenue - non-current	83	93
MA
Change in Contract with Customer, Liability [Abstract]
Beginning Balance	1,039	874
Revenue recognized that was included in the deferred revenue balance at the beginning of the period	(431)	(386)
Increases due to amounts billable excluding amounts recognized as revenue during the period	636	452
Increases due to acquisitions during the period	1	4
Effect of exchange rate changes	(11)	(4)
Total changes in deferred revenue	195	66
Ending Balance	1,234	940
Deferred revenue - current	1,231	937
Deferred revenue - non-current	$ 3	$ 3