Segment Information - Consolidated Revenue Information by Geographic Area (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Segment Reporting Information [Line Items]
Revenue	$ 1,553	$ 1,435	$ 3,153	$ 2,725
United States
Segment Reporting Information [Line Items]
Revenue	831	837	1,716	1,551
Non-U.S.
Segment Reporting Information [Line Items]
Revenue	722	598	1,437	1,174
EMEA
Segment Reporting Information [Line Items]
Revenue	481	373	959	736
Asia-Pacific
Segment Reporting Information [Line Items]
Revenue	155	144	311	280
Americas
Segment Reporting Information [Line Items]
Revenue	$ 86	$ 81	$ 167	$ 158