Income Taxes - Schedule of Difference between Provision and U.S. Statutory Income Tax Rate (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Income (loss) before income taxes, inclusive of equity in loss of affiliate	$ (171)	$ 584	$ (158)
Taxes at the U.S. federal statutory income tax rate	(60)	205	(55)
Effect of foreign operations	(50)	(5)	(137)
Tax impact of partnership structure	167	0	0
Tax impact of dispositions	0	1	(26)
Nondeductible goodwill	0	0	713
Change in valuation allowances	169	28	9
Tax Cuts and Jobs Act enactment	(132)	0	0
Other - net	(23)	21	(31)
Provision for income taxes	$ 71	$ 250	$ 473
Actual income tax rate	(41.50%)	42.80%	(299.40%)