Financial Instruments, Derivatives and Hedging Activities (Details 3) (Derivatives in Cash Flow Hedging Relationships, USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Gains or losses on derivatives
Amount of Gains (Losses) Recognized in OCI on Derivatives	$ (13)	$ (45)
Amount of Gains (Losses) Reclassified from AOCI into Income	18	(7)
Cost of Sales
Gains or losses on derivatives
Amount of Gains (Losses) Reclassified from AOCI into Income	19	(6)
Financing Costs, net
Gains or losses on derivatives
Amount of Gains (Losses) Reclassified from AOCI into Income	(1)	(1)
Commodity contracts
Gains or losses on derivatives
Losses expected to be reclassified into earnings during the next 12 months on commodity hedging contracts, net of tax	25
Losses expected to be reclassified into earnings during the next 12 months on commodity hedging contracts, income tax effect	13
Commodity and foreign currency contracts
Gains or losses on derivatives
Amount of Gains (Losses) Recognized in OCI on Derivatives	(13)	(45)
T-Locks
Gains or losses on derivatives
Losses expected to be reclassified into earnings during next 12 months on Treasury Lock Agreements, net of tax	2
Losses expected to be reclassified into earnings during the next 12 months on Treasury Lock Agreements, income tax effect	$ 1