Accumulated Other Comprehensive Loss Reclassifications (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Amount Reclassified from Accumulated Other Comprehensive Income
Cost of sales	$ (1,021)	$ (1,049)
Financing costs, net	(14)	(14)
Before tax reclassifications	(10)	(14)
Income tax benefit	3	4
Total after-tax reclassifications	(7)	(10)
Deferred Gain/(Loss) on Hedging Activities | Reclassification out of Accumulated Other Comprehensive Income | Commodity and Foreign Currency Contracts
Amount Reclassified from Accumulated Other Comprehensive Income
Cost of sales	$ (10)	(13)
Deferred Gain/(Loss) on Hedging Activities | Reclassification out of Accumulated Other Comprehensive Income | Interest Rate Contract
Amount Reclassified from Accumulated Other Comprehensive Income
Financing costs, net		$ (1)