Segment Information - Consolidated Revenue Information by Geographic Area (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Segment Reporting Information [Line Items]
Revenue	$ 1,526	$ 1,356	$ 4,679	$ 4,081
United States
Segment Reporting Information [Line Items]
Revenue	844	729	2,560	2,280
Non-U.S.
Segment Reporting Information [Line Items]
Revenue	682	627	2,119	1,801
EMEA
Segment Reporting Information [Line Items]
Revenue	439	401	1,398	1,137
Asia-Pacific
Segment Reporting Information [Line Items]
Revenue	149	156	460	436
Americas
Segment Reporting Information [Line Items]
Revenue	$ 94	$ 70	$ 261	$ 228