Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
U.S. and foreign income (loss) before income taxes [Abstract]
U.S.	$ (10)	$ (7)	$ (3)
Mainland China	1,014	941	979
Other Foreign	104	69	(26)
Income Before Income Taxes	$ 1,108	$ 1,003	$ 950