Consolidated Statements of Shareholders' Equity - USD ($) $ in Millions	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Deficit [Member]	Accumulated Other Comprehensive Loss [Member]	Treasury Stock, at Cost [Member]	Noncontrolling Interest [Member]
Total shareholders’ equity at Dec. 31, 2012	$ 832
Beginning Balance, value at Dec. 31, 2012		$ 1	$ 2,150	$ (559)	$ (850)	$ (17)
Beginning Balance, Noncontrolling Interests at Dec. 31, 2012							$ 107
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	49			41			8
Other comprehensive (loss) income	220				224		(4)
Equity rights offering	500	1	499
Ending Balance, value at Dec. 31, 2013		2	2,649	(518)	(626)	(17)
Ending Balance, Noncontrolling Interest at Dec. 31, 2013							111
Total shareholders’ equity at Dec. 31, 2013	1,601
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(161)			(168)			7
Other comprehensive (loss) income	(531)				(516)		(15)
Ending Balance, value at Dec. 31, 2014	806	2	2,649	(686)	(1,142)	(17)
Ending Balance, Noncontrolling Interest at Dec. 31, 2014	103						103
Total shareholders’ equity at Dec. 31, 2014	909
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(104)			(110)			6
Capital investment in minority interest subsidiary	28						28
Other comprehensive (loss) income	(181)				(176)		(5)
Equity rights offering	250		250
Ending Balance, value at Dec. 31, 2015	770	$ 2	$ 2,899	$ (796)	$ (1,318)	$ (17)
Ending Balance, Noncontrolling Interest at Dec. 31, 2015	132						$ 132
Total shareholders’ equity at Dec. 31, 2015	$ 902