CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - 6 months ended Jun. 30, 2018 - USD ($)		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		$ 5,000,000		$ 4,698,000,000	$ (2,679,000,000)	$ (44,000,000)	$ (1,000,000)	$ 1,979,000,000
Comprehensive income:
Net income					259,000,000			259,000,000	[1]
Other comprehensive income
Comprehensive income	[1]							259,000,000
Stock-based compensation				13,000,000				13,000,000
Conversion of preferred stock, shares		74,998,614
Conversion of preferred stock		$ 1,000,000	$ (1,725,000)	(1,000,000)
Issuance of restricted stock, shares		312,819
Cancellation of restricted stock, shares		(882,633)
Performance units vested, shares		214,866
Tax withholding - stock compensation, shares		(347,876)
Tax withholding - stock compensation				(1,000,000)				(1,000,000)
Balance, shares at Jun. 30, 2018		586,430,101
Balance at Jun. 30, 2018		$ 6,000,000		$ 4,709,000,000	$ (2,420,000,000)	$ (44,000,000)	$ (1,000,000)	$ 2,250,000,000

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