Revenues - Revenue Recognition Timing (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Disaggregation of Revenue [Line Items]
Revenue recognized	$ 7,718	$ 7,088	$ 5,916
Operating Segments
Disaggregation of Revenue [Line Items]
Revenue recognized	7,718	7,088	5,916
Revenue recognized at a point in time
Disaggregation of Revenue [Line Items]
Revenue recognized	2,841	2,618	1,740
Revenue recognized over time
Disaggregation of Revenue [Line Items]
Revenue recognized	4,877	4,470	4,176
MA
Disaggregation of Revenue [Line Items]
Revenue recognized	3,599	3,295	3,056
MA | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue recognized	3,611	3,308	3,069
MA | Revenue recognized at a point in time | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue recognized	100	101	102
MA | Revenue recognized over time | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue recognized	3,499	3,194	2,954
MIS
Disaggregation of Revenue [Line Items]
Revenue recognized	4,119	3,793	2,860
MIS | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue recognized	4,317	3,986	3,046
MIS | Revenue recognized at a point in time | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue recognized	2,741	2,517	1,638
MIS | Revenue recognized over time | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue recognized	$ 1,378	$ 1,276	$ 1,222