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Segment Information - Consolidated Revenue Information by Geographic Area (Detail) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Revenue	$ 1,233	$ 1,240	$ 1,214	$ 1,142	$ 1,060	$ 1,081	$ 1,175	$ 1,127	$ 4,829	$ 4,443	$ 4,204
Long-lived assets	5,968				5,667				5,968	5,667	5,710
U.S.
Segment Reporting Information [Line Items]
Revenue									2,544	2,330	2,348
Long-lived assets	1,290				982				1,290	982	673
Non-U.S.
Segment Reporting Information [Line Items]
Revenue									2,285	2,113	1,856
Long-lived assets	$ 4,678				$ 4,685				4,678	4,685	5,037
EMEA
Segment Reporting Information [Line Items]
Revenue									1,446	1,377	1,132
Asia-Pacific
Segment Reporting Information [Line Items]
Revenue									551	493	471
Americas
Segment Reporting Information [Line Items]
Revenue									$ 288	$ 243	$ 253