Derivatives (Details) (Cash flow hedge) In Millions, unless otherwise specified	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, 2014 USD ($)	Sep. 30, 2013 USD ($)	Sep. 30, 2014 USD ($)	Sep. 30, 2013 USD ($)	Sep. 30, 2014 Foreign currency forward/option contracts USD ($)	Sep. 30, 2013 Foreign currency forward/option contracts USD ($)	Sep. 30, 2014 Foreign currency forward/option contracts USD ($)	Sep. 30, 2013 Foreign currency forward/option contracts USD ($)	Sep. 30, 2014 Foreign currency forward/option contracts Cost of Sales USD ($)	Sep. 30, 2013 Foreign currency forward/option contracts Cost of Sales USD ($)	Sep. 30, 2014 Foreign currency forward/option contracts Cost of Sales USD ($)	Sep. 30, 2013 Foreign currency forward/option contracts Cost of Sales USD ($)	Sep. 30, 2014 Foreign currency forward contracts USD ($)	Sep. 30, 2013 Foreign currency forward contracts USD ($)	Sep. 30, 2014 Foreign currency forward contracts USD ($)	Sep. 30, 2013 Foreign currency forward contracts USD ($)	Sep. 30, 2013 Foreign currency forward contracts Interest expense USD ($)	Sep. 30, 2013 Foreign currency forward contracts Interest expense USD ($)	Sep. 30, 2014 Commodity price swap contracts USD ($)	Sep. 30, 2013 Commodity price swap contracts USD ($)	Sep. 30, 2014 Commodity price swap contracts USD ($)	Sep. 30, 2013 Commodity price swap contracts USD ($)	Sep. 30, 2014 Commodity price swap contracts Cost of Sales USD ($)	Sep. 30, 2013 Commodity price swap contracts Cost of Sales USD ($)	Sep. 30, 2014 Commodity price swap contracts Cost of Sales USD ($)	Sep. 30, 2013 Commodity price swap contracts Cost of Sales USD ($)	Sep. 30, 2011 Interest rate swap contracts USD ($)	Aug. 31, 2011 Interest rate swap contracts USD ($)	Sep. 30, 2014 Interest rate swap contracts USD ($)	Sep. 30, 2013 Interest rate swap contracts USD ($)	Sep. 30, 2014 Interest rate swap contracts USD ($)	Sep. 30, 2013 Interest rate swap contracts USD ($)	Aug. 31, 2014 Interest rate swap contracts EUR (€)	Sep. 30, 2011 Interest rate swap contracts Fixed rate Medium-term note due 2016 USD ($)	Sep. 30, 2014 Interest rate swap contracts Interest expense USD ($)	Sep. 30, 2013 Interest rate swap contracts Interest expense USD ($)	Sep. 30, 2014 Interest rate swap contracts Interest expense USD ($)	Sep. 30, 2013 Interest rate swap contracts Interest expense USD ($)
Derivatives in Cash Flow Hedging Relationships
Maximum length of time hedged in cash flow hedge							24 months														12 months
Maximum length of time hedged in cash flow hedge prior to current period							12 months
Derivative notional amount					$ 2,200		$ 2,200												$ 22		$ 22							$ 400					€ 200
Principal amount																																		1,000
Pretax Gain (Loss) Recognized in Other Comprehensive Income on Effective portion of Derivative	98	5	86	(109)	103	(39)	90	2						44		(110)			(3)	0	(2)	(1)					(7)		(2)	0	(2)	0
Gain (Loss) on Hedged Item Recognized in Income	(9)	43	(8)	(121)					(7)	1	(9)	(8)					44	(111)					(1)	(1)	2	(1)									(1)	(1)	(1)	(1)
Accumulated other comprehensive income (loss), unrealized gain (loss) on cash flow hedges	53		53																								(4)		(2)		(2)
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
Term of debt instrument																																		5 years
Term of derivative contract																												5 years
Change related to revision to gain recognized in other comprehensive income and gain reclassified into income													$ (15)		$ (17)