Income Taxes - Income Tax Expense (Benefit) Attributable to Continuing Operations (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Current
U.S. federal and state	$ 12	$ (5)	$ 23
Non-U.S.	80	134	106
Total current	92	129	129
Deferred
U.S. federal and state	(9)	(177)	(1)
Non-U.S.	(1)	(22)	(9)
Total deferred	(10)	(199)	(10)
Total expense (benefit)	$ 82	$ (70)	$ 119