Revenues - Revenue Recognition Timing (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Disaggregation of Revenue [Line Items]
Revenue recognized	$ 2,079	$ 1,924
At Point in Time
Disaggregation of Revenue [Line Items]
Revenue recognized	816	757
Over Time
Disaggregation of Revenue [Line Items]
Revenue recognized	1,263	1,167
MA
Disaggregation of Revenue [Line Items]
Revenue recognized	926	859
MA | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue recognized	929	862
MA | At Point in Time | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue recognized	26	25
MA | Over Time | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue recognized	900	834
MIS
Disaggregation of Revenue [Line Items]
Revenue recognized	1,153	1,065
MIS | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue recognized	1,204	1,114
MIS | At Point in Time | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue recognized	790	732
MIS | Over Time | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue recognized	$ 363	$ 333