CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME LOSS [Abstract]
Net loss		$ (593)	$ (788)	$ (1,725)	$ (710)
Change in derivatives:
Settlements	[1]		(33)		(58)
Change in fair value of derivative instruments	[2]		(4)		13
Total change in derivatives			(37)		(45)
Change in value of pension and other postretirement liabilities:
Amortization of prior service cost and net loss included in net periodic pension cost	[3]	(1)
Net gain incurred in period	[4]	4		4
Change in currency translation adjustment			2	3	(4)
Comprehensive loss		$ (590)	$ (823)	$ (1,718)	$ (759)

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

[2] Net of $1 million and $8 million in taxes for the three and six months ended June 30, 2015.

[3] Net of $1 million in taxes for the six months ended June 30, 2016.

[4] Net of $1 million in taxes for the three and six months ended June 30, 2016.