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Revenues - Revenue Recognition Timing (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Disaggregation of Revenue [Line Items]
Revenue recognized	$ 2,007	$ 1,813	$ 5,829	$ 5,416
At Point in Time
Disaggregation of Revenue [Line Items]
Revenue recognized	774	689	2,213	2,097
Over Time
Disaggregation of Revenue [Line Items]
Revenue recognized	1,233	1,124	3,616	3,319
MA
Disaggregation of Revenue [Line Items]
Revenue recognized	909	831	2,656	2,432
MA | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue recognized	912	834	2,665	2,442
MA | At Point in Time | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue recognized	21	26	65	65
MA | Over Time | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue recognized	888	805	2,591	2,367
MIS
Disaggregation of Revenue [Line Items]
Revenue recognized	1,098	982	3,173	2,984
MIS | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue recognized	1,148	1,030	3,322	3,128
MIS | At Point in Time | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue recognized	753	663	2,148	2,032
MIS | Over Time | Operating Segments
Disaggregation of Revenue [Line Items]
Revenue recognized	$ 345	$ 319	$ 1,025	$ 952

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