Income Taxes - Schedule of Difference between Provision and U.S. Statutory Income Tax Rate (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Income (loss) before income taxes, inclusive of equity in loss of affiliate	$ 753	$ 541	$ (346)
Taxes at the U.S. federal statutory income tax rate	158	114	(121)
Effect of foreign operations	85	103	(23)
Tax impact of partnership structure	124	109	275
Change in valuation allowances	135	59	69
Tax Cuts and Jobs Act enactment	0	25	(32)
Other - net	(26)	(8)	(22)
Provision for income taxes	$ 476	$ 402	$ 146
Actual income tax rate	63.20%	74.30%	(42.20%)