Consolidated Statement Of Comprehensive Income (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Net income	$ (974)	$ 526	$ 151
Unrealized net gain (loss) on derivative hedging instruments, net of income taxes (benefit)	22	3	(2)
Reclassification adjustments for derivative (gains) losses included in net income, net of income taxes (benefit)	(4)	4	(8)
Pension and other postretirement activity, net of income taxes (benefit)	(32)	46	(4)
Total other comprehensive income (loss), net of taxes	50	(39)	(6)
Comprehensive Income (Loss)	(924)	487	145
Less: Comprehensive Income Attributable to Noncontrolling Interest	8	1	10
Comprehensive Income (Loss)	$ (932)	$ 486	$ 135