Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (139)	$ (170)	$ (5,096)	$ (577)
Postretirement and postemployment plans
Change in actuarial loss and other	8	19	12	(5)
Income tax provision (benefit)	0	(7)	0	2
Postretirement and postemployment plans, net of tax	8	12	12	(3)
Derivative hedges
Net unrecognized gain (loss)	(14)	0	(13)	0
Income tax provision	0	0	0	0
Derivative hedges, net of tax	(14)	0	(13)	0
Foreign currency hedges
Net recognized gain reclassified to discontinued operations	0	0	34	0
Income tax benefit (provision)	0	0	(4)	0
Foreign currency hedges, net of tax	0	0	30	0
Other, Net of Tax	0	(2)	0	(2)
Other comprehensive income (loss)	(6)	10	29	(5)
Comprehensive income (loss)	$ (145)	$ (160)	$ (5,067)	$ (582)