CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (Unaudited) - USD ($) $ in Millions	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Noncontrolling Interest
Beginning Balance at Dec. 31, 2014	$ 1,571	$ 1	$ 989	$ 566	$ (11)	$ 26
Beginning Balance (in shares) at Dec. 31, 2014		51,143,723
Increase (Decrease) in Stockholders' Equity
Total comprehensive (loss) income	(79)			(91)	1	11
Distributions to noncontrolling interest	(5)					(5)
Stock compensation expense	7		7
Stock issued under share-based payment plans	2		2
Stock issued under share-based payment plans (in shares)		202,901
Repurchase of Common stock	(1)	$ (1)	5	(5)
Repurchase of Common stock (in shares)		(1,574,252)
Conversion of Convertible Notes	(18)	$ 1	(19)
Conversion of Convertible Notes (in shares)		10,075,653
Recognition of deferred taxes related to Convertible notes	2		2
Ending Balance at Sep. 30, 2015	1,479	$ 1	986	470	(10)	32
Ending Balance (in shares) at Sep. 30, 2015		59,848,025
Beginning Balance at Dec. 31, 2015	$ 1,348	$ 1	911	416	(10)	30
Beginning Balance (in shares) at Dec. 31, 2015	55,007,983	55,007,983
Increase (Decrease) in Stockholders' Equity
Total comprehensive (loss) income	$ (59)			(69)	1	9
Distributions to noncontrolling interest	(3)					(3)
Stock compensation expense	6		6
Stock issued under share-based payment plans	(9)		(9)
Stock issued under share-based payment plans (in shares)		86,354
Repurchase of Common stock	(23)	$ 0	(23)	0
Repurchase of Common stock (in shares)		(1,508,772)
Ending Balance at Sep. 30, 2016	$ 1,260	$ 1	$ 885	$ 347	$ (9)	$ 36
Ending Balance (in shares) at Sep. 30, 2016	53,585,565	53,585,565