Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 991	$ 38	$ 46
Derivatives qualifying as cash flow hedges:
Gain (loss) on derivatives qualifying as cash flow hedges, net of tax of $4, $0, and $0, respectively	(5)	(15)	4
Less: Reclassification adjustment for (loss) gain on derivatives included in net income, net of tax of $2, $0, and $0, respectively	(9)	4	1
Derivatives qualifying as cash flow hedges, net of tax of $2, $0, and $0, respectively	4	(19)	3
Pension and postretirement benefits:
Changes in pension and postretirement benefits, net of tax (benefit) of $6, ($2) and $10, respectively	74	(272)	247
Less: Amortization of prior service benefit cost included in net periodic pension cost, net of tax (benefit) of ($1), ($1) and ($2), respectively	(7)	(2)	(24)
Pension and postretirement benefits, net of tax (benefit) of $7, ($1) and $12, respectively	81	(270)	271
Foreign currency translation:
Changes in foreign currency translation, net of tax of $0 in all periods	(67)	(68)	(17)
Less: Translation (loss) gain realized upon sale of foreign entities, net of tax of $0 in all periods	(6)	5	0
Foreign currency translation, net of tax of $0 in all periods	(61)	(73)	(17)
Other comprehensive income (loss), net of tax	24	(362)	257
Comprehensive income (loss)	$ 1,015	$ (324)	$ 303