Income Taxes - Schedule of Components of Income Tax Provision (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Current:
U.S.	$ (18)	$ 55	$ (75)
Foreign	443	445	453
Total current	425	500	378
Deferred:
U.S.	(12)	(60)	(49)
Foreign	63	(38)	(183)
Total deferred	51	(98)	(232)
Provision for income taxes	$ 476	$ 402	$ 146