Revenues - Revenue Recognition Timing (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Disaggregation of Revenue [Line Items]
Revenue recognized	$ 1,522	$ 1,600
At Point in Time
Disaggregation of Revenue [Line Items]
Revenue recognized	570	774
Over Time
Disaggregation of Revenue [Line Items]
Revenue recognized	952	826
MIS
Disaggregation of Revenue [Line Items]
Revenue recognized	827	1,036
MIS | At Point in Time
Disaggregation of Revenue [Line Items]
Revenue recognized	529	745
MIS | Over Time
Disaggregation of Revenue [Line Items]
Revenue recognized	298	291
MA
Disaggregation of Revenue [Line Items]
Revenue recognized	695	564
MA | At Point in Time
Disaggregation of Revenue [Line Items]
Revenue recognized	41	29
MA | Over Time
Disaggregation of Revenue [Line Items]
Revenue recognized	$ 654	$ 535