Derivative Instruments and Hedging Activities (Details) (Not designated as a hedge, USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Derivative instruments and hedging activities
Total gain (loss)	$ 6	$ (2)	$ 2	$ (2)
Foreign currency exchange contracts | Other, net
Derivative instruments and hedging activities
Total gain (loss)	5	(4)	2	3
Foreign currency forward contracts | Other, net
Derivative instruments and hedging activities
Total gain (loss)	1	(1)		1
Metals contracts | Cost of sales
Derivative instruments and hedging activities
Total gain (loss)		$ 3		$ (6)