Segment Information - Consolidated Revenue Information by Geographic Area (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Segment Reporting Information [Line Items]
Revenue	$ 1,435	$ 1,214	$ 2,725	$ 2,356
United States
Segment Reporting Information [Line Items]
Revenue	837	638	1,551	1,250
Non-U.S.
Segment Reporting Information [Line Items]
Revenue	598	576	1,174	1,106
EMEA
Segment Reporting Information [Line Items]
Revenue	373	362	736	695
Asia-Pacific
Segment Reporting Information [Line Items]
Revenue	144	141	280	273
Americas
Segment Reporting Information [Line Items]
Revenue	$ 81	$ 73	$ 158	$ 138