Revenues - Schedule of Changes in the Deferred Revenue Balances (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Change in Contract with Customer, Liability [Abstract]
Beginning Balance	$ 1,187	$ 1,162	$ 1,075
Revenue recognized that was included in the deferred revenue balance at the beginning of the period	(1,030)	(1,029)	(923)
Increases due to amounts billable excluding amounts recognized as revenue during the period	1,091	1,007	991
Increases due to acquisitions during the period	94	24	9
Effect of exchange rate changes	(7)	23	10
Total changes in deferred revenue	148	25	87
Ending Balance	1,335	1,187	1,162
Deferred revenue - current	1,249	1,089	1,050
Deferred revenue - noncurrent	86	98	112
MIS
Change in Contract with Customer, Liability [Abstract]
Beginning Balance	313	322	325
Revenue recognized that was included in the deferred revenue balance at the beginning of the period	(220)	(229)	(209)
Increases due to amounts billable excluding amounts recognized as revenue during the period	207	215	202
Increases due to acquisitions during the period	0	0	3
Effect of exchange rate changes	(4)	5	1
Total changes in deferred revenue	(17)	(9)	(3)
Ending Balance	296	313	322
Deferred revenue - current	214	216	214
Deferred revenue - noncurrent	82	97	108
MA
Change in Contract with Customer, Liability [Abstract]
Beginning Balance	874	840	750
Revenue recognized that was included in the deferred revenue balance at the beginning of the period	(810)	(800)	(714)
Increases due to amounts billable excluding amounts recognized as revenue during the period	884	792	789
Increases due to acquisitions during the period	94	24	6
Effect of exchange rate changes	(3)	18	9
Total changes in deferred revenue	165	34	90
Ending Balance	1,039	874	840
Deferred revenue - current	1,035	873	836
Deferred revenue - noncurrent	$ 4	$ 1	$ 4