Revenues - Revenue Recognition Timing (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Disaggregation of Revenue [Line Items]
Revenue recognized	$ 1,472	$ 1,275	$ 4,436	$ 4,178
At Point in Time
Disaggregation of Revenue [Line Items]
Revenue recognized	412	316	1,336	1,312
Over Time
Disaggregation of Revenue [Line Items]
Revenue recognized	1,060	959	3,100	2,866
MA
Disaggregation of Revenue [Line Items]
Revenue recognized	776	685	2,260	2,055
MA | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue recognized	779	687	2,270	2,060
MA | At Point in Time
Disaggregation of Revenue [Line Items]
Revenue recognized	24		73
MA | At Point in Time | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue recognized		20		77
MA | Over Time
Disaggregation of Revenue [Line Items]
Revenue recognized	752		2,187
MA | Over Time | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue recognized		665		1,978
MIS
Disaggregation of Revenue [Line Items]
Revenue recognized	696	590	2,176	2,123
MIS | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue recognized	743	633	2,314	2,252
MIS | At Point in Time
Disaggregation of Revenue [Line Items]
Revenue recognized	388		1,263
MIS | At Point in Time | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue recognized		296		1,235
MIS | Over Time
Disaggregation of Revenue [Line Items]
Revenue recognized	$ 308		$ 913
MIS | Over Time | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue recognized		$ 294		$ 888