Income Taxes - Effective Income Tax Rate (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Effective income tax rate
U.S. federal income tax rate	$ (78)	$ (108)	$ (109)
Foreign tax rate variances	3	(1)	(8)
State taxes, net of federal benefit	(3)	(7)	(6)
Tax credits	(3)	(6)	(7)
Change in Valuation Allowances	89	113	120
Non-Controlling Interest	0	0	2
Earnings of equity investments	0	14	15
Withholding taxes	7	3	4
Tax on divestiture	0	23	0
Convertible debt	0	0	(10)
Other, net	1	1	0
Total income tax expense	$ 16	$ 32	$ 1