CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Statement of Comprehensive Income [Abstract]
Net Income (Loss)	$ 941		$ 2,445		$ (2,568)
Other Comprehensive Income (Loss), net of taxes
Reclassification of previously deferred derivative losses to (gains) losses on derivatives, net (1)	7	[1]	8	[1]	10	[1]
Adjustments for pension and other postretirement plans
Net gain (loss) incurred during period (2)	264	[2]	(99)	[2]	(136)	[2]
Prior service credit (cost) incurred during period (3)	0	[3]	0	[3]	7	[3]
Amortization of net actuarial (gain) loss to general and administrative expense (4)	83	[4]	61	[4]	54	[4]
Amortization of net prior service (credit) cost to general and administrative expense	1		2		2
Total adjustments for pension and other postretirement plans	348		(36)		(73)
Total	355		(28)		(63)
Comprehensive Income (Loss)	1,296		2,417		(2,631)
Comprehensive income attributable to noncontrolling interests	140		54		81
Comprehensive Income (Loss) Attributable to Common Stockholders	$ 1,156		$ 2,363		$ (2,712)

[1] Net of income tax benefit (expense) of $(4) million in 2013, $(4) million in 2012, and $(5) million in 2011.

[2] Net of income tax benefit (expense) of $(152) million in 2013, $56 million in 2012, and $77 million in 2011.

[3] Net of income tax benefit (expense) of $(5) million in 2011.

[4] Net of income tax benefit (expense) of $(49) million in 2013, $(32) million in 2012, and $(31) million in 2011.