CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (USD $) In Millions, except Share data, unless otherwise specified	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Noncontrolling Interest
Balance at Dec. 31, 2011	$ 1,461	$ 1	$ 1,082	$ 338	$ 21	$ 19
Balance (in shares) at Dec. 31, 2011		56,361,155
Increase (Decrease) in Stockholders' Equity
Total comprehensive income (loss)	27			(24)	7	44
Distributions to noncontrolling interest	(27)					(27)
Stock compensation expense	3		3
Stock issued under share-based payment plans	(1)		(1)
Stock issued under share-based payment plans (in shares)		334,575
Conversion option related to Convertible note issuance, net	33		33
Recognition of deferred taxes related to Convertible notes	3		3
Balance at Sep. 30, 2012	1,499	1	1,120	314	28	36
Balance (in shares) at Sep. 30, 2012		56,695,730
Balance at Dec. 31, 2012	1,562	1	1,127	372	26	36
Balance (in shares) at Dec. 31, 2012	56,975,991	56,975,991
Increase (Decrease) in Stockholders' Equity
Total comprehensive income (loss)	112			90	(8)	30
Distributions to noncontrolling interest	(41)					(41)
Stock compensation expense	6		6
Stock issued under share-based payment plans	1		1
Stock issued under share-based payment plans (in shares)		256,465
Recognition of deferred taxes related to Convertible notes	3		3
Balance at Sep. 30, 2013	$ 1,643	$ 1	$ 1,137	$ 462	$ 18	$ 25
Balance (in shares) at Sep. 30, 2013	57,232,456	57,232,456