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, 2012	$ 1,562	$ 1	$ 1,127	$ 372	$ 26	$ 36
Balance (in shares) at Dec. 31, 2012		56,975,991
Increase (Decrease) in Stockholders' Equity
Total comprehensive income (loss)	59			52	(5)	12
Distributions to noncontrolling interest	(15)					(15)
Stock compensation expense	2		2
Stock issued under share-based payment plans	(1)		(1)
Stock issued under share-based payment plans (in shares)		113,350
Recognition of deferred taxes related to Convertible notes	1		1
Balance at Mar. 31, 2013	1,608	1	1,129	424	21	33
Balance (in shares) at Mar. 31, 2013		57,089,341
Balance at Dec. 31, 2013	1,690	1	1,142	507	16	24
Balance (in shares) at Dec. 31, 2013	57,265,517	57,265,517
Increase (Decrease) in Stockholders' Equity
Total comprehensive income (loss)	(51)			(42)	(7)	(2)
Stock compensation expense	3		3
Stock issued under share-based payment plans	1		1
Stock issued under share-based payment plans (in shares)		113,595
Recognition of deferred taxes related to Convertible notes	1		1
Balance at Mar. 31, 2014	$ 1,644	$ 1	$ 1,147	$ 465	$ 9	$ 22
Balance (in shares) at Mar. 31, 2014	57,379,112	57,379,112