Revenues - Consolidated Revenue Information by Geographic Area (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Segment Reporting Information [Line Items]
Revenue	$ 1,470	$ 1,522
MA
Segment Reporting Information [Line Items]
Revenue	737	695
MIS
Segment Reporting Information [Line Items]
Revenue	733	827
United States
Segment Reporting Information [Line Items]
Revenue	770	823
United States | MA
Segment Reporting Information [Line Items]
Revenue	324	310
United States | MIS
Segment Reporting Information [Line Items]
Revenue	446	513
Non-U.S.
Segment Reporting Information [Line Items]
Revenue	700	699
Non-U.S. | MA
Segment Reporting Information [Line Items]
Revenue	413	385
Non-U.S. | MIS
Segment Reporting Information [Line Items]
Revenue	287	314
EMEA
Segment Reporting Information [Line Items]
Revenue	451	457
EMEA | MA
Segment Reporting Information [Line Items]
Revenue	278	264
EMEA | MIS
Segment Reporting Information [Line Items]
Revenue	173	193
Asia-Pacific
Segment Reporting Information [Line Items]
Revenue	151	141
Asia-Pacific | MA
Segment Reporting Information [Line Items]
Revenue	80	67
Asia-Pacific | MIS
Segment Reporting Information [Line Items]
Revenue	71	74
Americas
Segment Reporting Information [Line Items]
Revenue	98	101
Americas | MA
Segment Reporting Information [Line Items]
Revenue	55	54
Americas | MIS
Segment Reporting Information [Line Items]
Revenue	$ 43	$ 47