Derivatives (Details) (USD $)			3 Months Ended												1 Months Ended	3 Months Ended
	Mar. 31, 2012	Dec. 31, 2011	Mar. 31, 2012 Cash flow hedge	Mar. 31, 2011 Cash flow hedge	Mar. 31, 2012 Cash flow hedge Foreign currency forward/option contracts	Mar. 31, 2011 Cash flow hedge Foreign currency forward/option contracts	Mar. 31, 2011 Cash flow hedge Foreign currency forward/option contracts Cost of Sales	Mar. 31, 2012 Cash flow hedge Foreign currency forward contracts	Mar. 31, 2011 Cash flow hedge Foreign currency forward contracts	Mar. 31, 2011 Cash flow hedge Foreign currency forward contracts Interest expense	Mar. 31, 2012 Cash flow hedge Commodity price swap contracts	Mar. 31, 2011 Cash flow hedge Commodity price swap contracts	Mar. 31, 2012 Cash flow hedge Commodity price swap contracts Cost of Sales	Mar. 31, 2011 Cash flow hedge Commodity price swap contracts Cost of Sales	Aug. 31, 2011 Cash flow hedge Interest rate swap contracts Y	Mar. 31, 2012 Cash flow hedge Interest rate swap contracts
Derivatives gain (loss)
Maximum length of time hedged (in months)					12 months						12 months
Term of interest rate swap (in years)															5 years
Dollar equivalent gross notional amount, foreign exchange forward and option contracts designated as cash flow hedges					$ 5,200,000,000
Dollar equivalent gross notional amount, natural gas commodity price swaps designated as cash flow hedges											23,000,000
Dollar equivalent gross notional amount, forecasted debt issuance contracts designated as cash flow hedges															400,000,000
Principal amount															1,000,000,000
Pretax Gain (Loss) Recognized in Other Comprehensive Income on Effective portion of Derivative			(28,000,000)	(27,000,000)	(24,000,000)	(34,000,000)		1,000,000	8,000,000		(5,000,000)	(1,000,000)				(7,000,000)
Accumulated other comprehensive income (loss), unrealized gain (loss) on cash flow hedges	7,000,000	22,000,000														(4,000,000)
The time period estimated for the anticipated transfer of gains (losses), net from accumulated other comprehensive income into earnings (in months)			12 months													5 years
Debt instrument term															5
Pretax Gain (Loss) Recognized in Income on Effective Portion of Derivative as a Result of Reclassification from Accumulated Other Comprehensive Income			$ (4,000,000)				$ (6,000,000)			$ 10,000,000			$ (4,000,000)	$ (4,000,000)