Income Taxes - Components of Income Before Tax and Benefit for Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Components of income (loss) before income taxes
United States	$ (420)	$ (158)	$ (356)
Foreign	(124)	50	17
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	(544)	(108)	(339)
Current
U.S. Federal	6	(5)	19
U.S. State	(1)	1	4
Foreign	20	32	22
Total	25	28	45
Deferred
U.S. Federal	(4)	(3)	(10)
U.S. State	(4)	(3)	(7)
Foreign	(13)	(12)	(15)
Total	(21)	(18)	(32)
Total income tax expense	$ 4	$ 10	$ 13