Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Net income (loss)	$ (5,769)	$ (667)	$ 3,501
Other comprehensive income, net of income taxes:
Defined benefit and other postretirement plans adjustments	(92)	105	(84)
Unrealized loss on cash flow hedges	0	(67)	0
Other	1	(2)	(7)
Other comprehensive income (loss), net of income taxes	(91)	36	(92)
Comprehensive income (loss)	(5,860)	(631)	3,410
Comprehensive (income) loss attributable to noncontrolling interest	6	(4)	(1)
Comprehensive income (loss) attributable to company shareholders	$ (5,854)	$ (635)	$ 3,409