Income Taxes - Income Tax Expense (Benefit) Attributable to Continuing Operations (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Current
U.S. federal and state	$ (18)	$ 12	$ (5)
Non-U.S.	74	80	134
Total current	56	92	129
Deferred
U.S. federal and state	(497)	(9)	(177)
Non-U.S.	17	(1)	(22)
Total deferred	(480)	(10)	(199)
Total expense (benefit)	$ (424)	$ 82	$ (70)