CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Millions, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Statement of Comprehensive Income [Abstract]
Net Income (Loss)	$ 1,147		$ 223		$ (1,213)		$ 1,666
Other Comprehensive Income (Loss), net of taxes
Reclassification of previously deferred derivative losses to (gains) losses on derivatives, net (1)	1	[1]	2	[1]	4	[1]	5	[1]
Adjustments for pension and other postretirement plans
Amortization of net actuarial (gain) loss to general and administrative expense (2)	5	[2]	18	[2]	14	[2]	56	[2]
Amortization of net prior service (credit) cost to general and administrative expense	0		1		0		1
Total adjustments for pension and other postretirement plans	5		19		14		57
Total	6		21		18		62
Comprehensive Income (Loss)	1,153		244		(1,195)		1,728
Comprehensive income attributable to noncontrolling interests	60		41		142		95
Comprehensive Income (Loss) Attributable to Common Stockholders	$ 1,093		$ 203		$ (1,337)		$ 1,633

[1] Net of income tax benefit (expense) of $(1) million for the three months ended September 30, 2014 and 2013, and $(3) million for the nine months ended September 30, 2014 and 2013.

[2] Net of income tax benefit (expense) of $(2) million for the three months ended September 30, 2014, $(11) million for the three months ended September 30, 2013, $(7) million for the nine months ended September 30, 2014, and $(32) million for the nine months ended September 30, 2013.