Income Taxes - Income Tax Provision (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Current income tax expense
U.S. federal	$ (1)	$ 13	$ 284
U.S. state and local	0	(5)	14
Non-U.S.	118	51	63
Total current	117	59	361
Deferred income tax expense
U.S. federal	20	95	(87)
U.S. state and local	13	6	(5)
Non-U.S.	9	31	9
Total deferred	42	132	(83)
Total income tax provision	$ 159	$ 191	$ 278