Segment Information - Financial Information by Segment (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Segment Reporting Information, Operating Income (Loss) [Abstract]
Revenue	$ 1,470	$ 1,522
Operating, SG&A	814	788
Adjusted Operating Income	656	734
Depreciation and amortization	88	78
Restructuring	14	0
Operating income	554	656
Eliminations
Segment Reporting Information, Operating Income (Loss) [Abstract]
Revenue	(48)	(45)
Operating, SG&A	(48)	(45)
Adjusted Operating Income	0	0
Depreciation and amortization	0	0
Restructuring	0	0
MIS
Segment Reporting Information, Operating Income (Loss) [Abstract]
Revenue	733	827
MIS | Operating Segments
Segment Reporting Information, Operating Income (Loss) [Abstract]
Revenue	778	870
Operating, SG&A	336	360
Adjusted Operating Income	442	510
Depreciation and amortization	18	18
Restructuring	6	0
MIS | Eliminations
Segment Reporting Information, Operating Income (Loss) [Abstract]
Revenue	45	43
MA
Segment Reporting Information, Operating Income (Loss) [Abstract]
Revenue	737	695
MA | Operating Segments
Segment Reporting Information, Operating Income (Loss) [Abstract]
Revenue	740	697
Operating, SG&A	526	473
Adjusted Operating Income	214	224
Depreciation and amortization	70	60
Restructuring	8	0
MA | Eliminations
Segment Reporting Information, Operating Income (Loss) [Abstract]
Revenue	$ 3	$ 2