Income Taxes - Effective Income Tax Rate (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Effective income tax rate
U.S. federal income tax rate	$ (109)	$ (53)	$ (110)
Foreign tax rate variances	(8)	1	9
State taxes, net of federal benefit	(6)	0	(2)
Tax credits	(7)	(9)	(10)
Change in Valuation Allowances	120	79	62
Non-Controlling Interest	2	3	21
Earnings of equity investments	15	13	7
Withholding taxes	4	5	4
Goodwill impairment	0	0	13
Change in U.S. tax rate	0	0	35
Convertible debt	10	0	0
Other, net	0	3	2
Total income tax expense	$ 1	$ 42	$ 30