Derivative Instruments and Hedging Activities (Details 3) - Not designated as a hedge - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Derivative instruments and hedging activities
Total (loss) gain	$ (8)	$ 6	$ (15)	$ 1
Foreign currency exchange contracts | Other, net
Derivative instruments and hedging activities
Total (loss) gain		5	3	2
Foreign currency forward contracts | Other, net
Derivative instruments and hedging activities
Total (loss) gain	1	$ 1	(3)
Metal contracts | Cost of sales
Derivative instruments and hedging activities
Total (loss) gain	$ (9)		(14)
Interest Rate Swaps
Derivative instruments and hedging activities
Total (loss) gain			$ (1)	$ (1)