CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) [Abstract]
Net income (loss)		$ (788)	$ 207	$ (710)	$ 401
Change in derivatives:
Settlements	[1]	$ (33)	$ 15	$ (58)	40
Ineffectiveness	[2]				1
Change in fair value of derivative instruments	[3]	$ (4)	$ 5	$ 13	(49)
Total change in derivatives		(37)	20	(45)	(8)
Change in currency translation adjustment		2	3	(4)
Comprehensive income (loss)		$ (823)	$ 230	$ (759)	$ 393

[1] Net of $(20), $10, $(37) and $27 million in taxes for the three months ended June 30, 2015 and 2014, and six months ended June 30, 2015 and 2014, respectively.

[2] Net of $0, $0, $0 and $1 million in taxes for the three months ended June 30, 2015 and 2014, and six months ended June 30, 2015 and 2014, respectively.

[3] Net of $1, $4, $8 and $(32) million in taxes for the three months ended June 30, 2015 and 2014, and six months ended June 30, 2015 and 2014, respectively.