Derivatives (Details) (USD $)			3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		1 Months Ended	3 Months Ended		9 Months Ended		1 Months Ended	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2012 Cash flow hedge	Sep. 30, 2011 Cash flow hedge	Sep. 30, 2012 Cash flow hedge	Sep. 30, 2011 Cash flow hedge	Sep. 30, 2012 Cash flow hedge Foreign currency forward/option contracts	Sep. 30, 2011 Cash flow hedge Foreign currency forward/option contracts	Sep. 30, 2012 Cash flow hedge Foreign currency forward/option contracts	Sep. 30, 2011 Cash flow hedge Foreign currency forward/option contracts	Sep. 30, 2012 Cash flow hedge Foreign currency forward/option contracts Cost of Sales	Sep. 30, 2011 Cash flow hedge Foreign currency forward/option contracts Cost of Sales	Sep. 30, 2012 Cash flow hedge Foreign currency forward/option contracts Cost of Sales	Sep. 30, 2011 Cash flow hedge Foreign currency forward/option contracts Cost of Sales	Sep. 30, 2012 Cash flow hedge Foreign currency forward contracts	Sep. 30, 2011 Cash flow hedge Foreign currency forward contracts	Sep. 30, 2012 Cash flow hedge Foreign currency forward contracts	Sep. 30, 2011 Cash flow hedge Foreign currency forward contracts	Sep. 30, 2012 Cash flow hedge Foreign currency forward contracts Interest expense	Sep. 30, 2011 Cash flow hedge Foreign currency forward contracts Interest expense	Sep. 30, 2012 Cash flow hedge Foreign currency forward contracts Interest expense	Sep. 30, 2011 Cash flow hedge Foreign currency forward contracts Interest expense	Sep. 30, 2012 Cash flow hedge Commodity price swap contracts	Sep. 30, 2011 Cash flow hedge Commodity price swap contracts	Sep. 30, 2012 Cash flow hedge Commodity price swap contracts	Sep. 30, 2011 Cash flow hedge Commodity price swap contracts	Sep. 30, 2012 Cash flow hedge Commodity price swap contracts Cost of Sales	Sep. 30, 2011 Cash flow hedge Commodity price swap contracts Cost of Sales	Sep. 30, 2012 Cash flow hedge Commodity price swap contracts Cost of Sales	Sep. 30, 2011 Cash flow hedge Commodity price swap contracts Cost of Sales	Aug. 31, 2011 Cash flow hedge Interest rate swap contracts	Sep. 30, 2012 Cash flow hedge Interest rate swap contracts	Sep. 30, 2011 Cash flow hedge Interest rate swap contracts	Sep. 30, 2012 Cash flow hedge Interest rate swap contracts	Sep. 30, 2011 Cash flow hedge Interest rate swap contracts	Aug. 31, 2011 Cash flow hedge Interest rate swap contracts Fixed rate Medium-term note due 2016	Sep. 30, 2012 Cash flow hedge Interest rate swap contracts Interest expense	Sep. 30, 2011 Cash flow hedge Interest rate swap contracts Interest expense	Sep. 30, 2012 Cash flow hedge Interest rate swap contracts Interest expense	Sep. 30, 2011 Cash flow hedge Interest rate swap contracts Interest expense
Derivatives in Cash Flow Hedging Relationships
Maximum length of time hedged in cash flow hedge							12 months																12 months
Dollar equivalent gross notional amount, foreign exchange forward and option contracts designated as cash flow hedges							$ 6,500,000,000		$ 6,500,000,000
Dollar equivalent gross notional amount, natural gas commodity price swaps designated as cash flow hedges																							19,000,000		19,000,000
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			21,000,000	(12,000,000)	22,000,000	(74,000,000)	(38,000,000)	49,000,000	(20,000,000)	(12,000,000)					57,000,000	(56,000,000)	45,000,000	(55,000,000)					2,000,000	2,000,000	(3,000,000)	0					(7,000,000)	0	(7,000,000)	0	(7,000,000)
Pretax Gain (Loss) Recognized in Income on Effective Portion of Derivative as a Result of Reclassification from Accumulated Other Comprehensive Income			78,000,000	(97,000,000)	66,000,000	(133,000,000)					22,000,000	(41,000,000)	31,000,000	(75,000,000)					58,000,000	(56,000,000)	45,000,000	(54,000,000)					(1,000,000)	0	(9,000,000)	(4,000,000)							(1,000,000)	0	(1,000,000)	0
Accumulated other comprehensive income (loss), unrealized gain (loss) on cash flow hedges	(6,000,000)	22,000,000																													(4,000,000)	(3,000,000)		(3,000,000)
The time period estimated for the anticipated transfer of gains (losses), net from accumulated other comprehensive income into earnings			12 months
Ineffective portion of gain (loss) on derivative and amount excluded from effectiveness testing recognized in income			$ 0	$ 0	$ 0	$ 0					$ 0	$ 0	$ 0	$ 0					$ 0	$ 0	$ 0	$ 0					$ 0	$ 0	$ 0	$ 0							$ 0	$ 0	$ 0	$ 0
Term of debt instrument																																				5 years
Term of interest rate swap																															5 years