Income Taxes - Provision (Benefit) for Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current:
U.S.	$ 8	$ 12	$ 8
Non-U.S.	86	99	109
Total	94	111	117
Deferred:
U.S.	1
Non-U.S.	(6)	7	(9)
Total	(5)	7	(9)
Total:
U.S.	9	12	8
Non-U.S.	80	106	100
Provision for income taxes	89	118	108
Total	$ 89	$ 118	$ 108