CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - 3 months ended Mar. 31, 2018 - USD ($) $ in Millions		Common Stock Outstanding [Member]	Preferred Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Income [Member]	Common Stock in Treasury [Member]	Total
Balance, shares at Dec. 31, 2017		512,134,311	1,725,000
Balance at Dec. 31, 2017		$ 5		$ 4,698	$ (2,679)	$ (44)	$ (1)	$ 1,979
Comprehensive income:
Net income					208			208	[1]
Other comprehensive income
Comprehensive income	[1]							208
Stock-based compensation				7				7
Issuance of common stock, shares		74,998,614
Issuance of common stock		$ 1		(1)
Conversion of preferred stock, shares			(1,725,000)
Issuance of restricted stock, shares		5,076
Cancellation of restricted stock, shares		(160,168)
Performance units vested, shares		214,866
Tax withholding - stock compensation, shares		(338,808)
Tax withholding - stock compensation				(1)				(1)
Balance, shares at Mar. 31, 2018		586,853,891
Balance at Mar. 31, 2018		$ 6		$ 4,703	$ (2,471)	$ (44)	$ (1)	$ 2,193

[1] In 2018, deferred tax activity incurred in other comprehensive income was offset by a valuation allowance.