Derivatives (Details) In Millions, unless otherwise specified	1 Months Ended		1 Months Ended		12 Months Ended																			1 Months Ended		12 Months Ended				1 Months Ended		12 Months Ended
	Sep. 30, 2011 Fixed rate Medium term note due 2016	Dec. 31, 2014 Fixed rate Medium term note due 2016 USD ($)	Nov. 30, 2014 Fixed rate Euro Medium term note due 2026	Dec. 31, 2014 Fixed rate Euro Medium term note due 2026 EUR (€)	Dec. 31, 2014 Cash flow hedge USD ($)	Dec. 31, 2013 Cash flow hedge USD ($)	Dec. 31, 2012 Cash flow hedge USD ($)	Dec. 31, 2014 Cash flow hedge Foreign currency forward/option contracts USD ($)	Dec. 31, 2013 Cash flow hedge Foreign currency forward/option contracts USD ($)	Dec. 31, 2012 Cash flow hedge Foreign currency forward/option contracts USD ($)	Dec. 31, 2014 Cash flow hedge Foreign currency forward/option contracts Cost of Sales USD ($)	Dec. 31, 2013 Cash flow hedge Foreign currency forward/option contracts Cost of Sales USD ($)	Dec. 31, 2012 Cash flow hedge Foreign currency forward/option contracts Cost of Sales USD ($)	Dec. 31, 2013 Cash flow hedge Foreign currency forward contracts USD ($)	Dec. 31, 2012 Cash flow hedge Foreign currency forward contracts USD ($)	Dec. 31, 2013 Cash flow hedge Foreign currency forward contracts Interest expense USD ($)	Dec. 31, 2012 Cash flow hedge Foreign currency forward contracts Interest expense USD ($)	Dec. 31, 2014 Cash flow hedge Commodity price swap contracts USD ($)	Dec. 31, 2013 Cash flow hedge Commodity price swap contracts USD ($)	Dec. 31, 2012 Cash flow hedge Commodity price swap contracts USD ($)	Dec. 31, 2014 Cash flow hedge Commodity price swap contracts Cost of Sales USD ($)	Dec. 31, 2013 Cash flow hedge Commodity price swap contracts Cost of Sales USD ($)	Dec. 31, 2012 Cash flow hedge Commodity price swap contracts Cost of Sales USD ($)	Nov. 30, 2014 Cash flow hedge Interest rate swap contracts USD ($)	Aug. 31, 2011 Cash flow hedge Interest rate swap contracts USD ($)	Dec. 31, 2014 Cash flow hedge Interest rate swap contracts USD ($)	Dec. 31, 2013 Cash flow hedge Interest rate swap contracts USD ($)	Dec. 31, 2012 Cash flow hedge Interest rate swap contracts USD ($)	Dec. 31, 2014 Cash flow hedge Interest rate swap contracts EUR (€)	Aug. 31, 2011 Cash flow hedge Interest rate swap contracts Fixed rate Medium term note due 2016 USD ($)	Nov. 30, 2014 Cash flow hedge Interest rate swap contracts Fixed rate Euro Medium term note due 2026 EUR (€)	Dec. 31, 2014 Cash flow hedge Interest rate swap contracts Interest expense USD ($)	Dec. 31, 2013 Cash flow hedge Interest rate swap contracts Interest expense USD ($)	Dec. 31, 2012 Cash flow hedge 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										$ 20							$ 400				€ 500
Principal amount		1,000		750																										1,000	750
Pretax Gain (Loss) Recognized in Other Comprehensive Income on Effective portion of Derivative					171	(98)	3	183	9	(35)				(108)	42			(4)	1	(4)					(7)	(8)	0	0
Gain (Loss) on Hedged Item Recognized in Income					4	(122)	72				3	(11)	41			(108)	42				2	(2)	(10)	(8)								(1)	(1)	(1)
Accumulated other comprehensive income (loss), unrealized gain (loss) on cash flow hedges					99																			(5)	(4)	(6)
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
Term of debt instrument	5 years		12 years																											5 years	12 years
Term of derivative contract																								12 years	5 years
Amount anticipated to be reclassifed within next twelve months					$ 70