CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) [Abstract]
Net income (loss)		$ (1,739)	$ 211	$ (2,449)	$ 612
Change in derivatives:
Settlements	[1]	(31)	(11)	(89)	29
Ineffectiveness	[2]	1	(2)	1	(1)
Change in fair value of derivative instruments	[3]	8	48	21	(1)
Total change in derivatives		(22)	35	(67)	27
Change in value of pension and other postretirement liabilities:
Amortization of prior service cost and net loss included in net periodic pension cost	[4]	1		1
Change in currency translation adjustment		(5)	(4)	(9)	(4)
Comprehensive income (loss)		$ (1,765)	$ 242	$ (2,524)	$ 635

[1] Net of ($19), ($7), ($56) and $19 million in taxes for the three months ended September 30, 2015 and 2014, and nine months ended September 30, 2015 and 2014, respectively.

[2] Net of ($1) million in taxes for the three months ended September 30, 2014.

[3] Net of $5, $32, $13 and ($1) million in taxes for the three months ended September 30, 2015 and 2014, and nine months ended September 30, 2015 and 2014, respectively.

[4] Net of $1 million in taxes for the nine months ended September 30, 2015.