Revenues - Revenue Recognition Timing (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Revenue recognized	$ 6,218	$ 5,371	$ 4,829
At Point in Time
Disaggregation of Revenue [Line Items]
Revenue recognized	2,741	2,303	1,941
Over Time
Disaggregation of Revenue [Line Items]
Revenue recognized	3,477	3,068	2,888
MIS
Disaggregation of Revenue [Line Items]
Revenue recognized	3,812	3,292	2,875
MIS | At Point in Time
Disaggregation of Revenue [Line Items]
Revenue recognized	2,640	2,182	1,809
MIS | Over Time
Disaggregation of Revenue [Line Items]
Revenue recognized	1,172	1,110	1,066
MA
Disaggregation of Revenue [Line Items]
Revenue recognized	2,406	2,079	1,954
MA | At Point in Time
Disaggregation of Revenue [Line Items]
Revenue recognized	101	121	132
MA | Over Time
Disaggregation of Revenue [Line Items]
Revenue recognized	$ 2,305	$ 1,958	$ 1,822