CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - 6 months ended Jun. 30, 2016 - USD ($) $ in Millions	Common Stock [Member]	Preferred Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Common Stock in Treasury [Member]	Total
Balance, shares at Dec. 31, 2015	390,138,549	1,725,000
Balance at Dec. 31, 2015	$ 4		$ 3,409	$ (1,082)	$ (48)	$ (1)	$ 2,282
Comprehensive loss:
Net loss				(1,725)			(1,725)
Other comprehensive income					7		7
Comprehensive loss							(1,718)
Stock-based compensation			42				42
Preferred stock dividend, shares	3,024,737
Preferred stock dividend			(27)				(27)
Issuance of restricted stock, shares	84,165
Cancellation of restricted stock, shares	(89,095)
Tax withholding - stock compensation, shares	(661,531)
Tax withholding - stock compensation			(6)				(6)
Balance, shares at Jun. 30, 2016	392,496,825	1,725,000
Balance at Jun. 30, 2016	$ 4		$ 3,418	$ (2,807)	$ (41)	$ (1)	$ 573