Fair Value Measurements and Financial Instruments (Details 3) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Fair Value Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount	$ 2,656	$ 2,282	$ 2,656	$ 2,282
Activity related to fair value hedges [Abstract]
Gain (loss) on derivative	(7)	(3)	(15)	14
Gain (loss) on hedged items	7	3	15	(14)
Fair Value Hedging [Member] | Foreign Currency Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount	1,568	944	1,568	944
Activity related to fair value hedges [Abstract]
Gain (loss) on derivative	(9)	(8)	3	2
Gain (loss) on hedged items	9	8	(3)	(2)
Fair Value Hedging [Member] | Interest Rate Swap Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount	1,088	1,338	1,088	1,338
Activity related to fair value hedges [Abstract]
Gain (loss) on derivative	2	5	(18)	12
Gain (loss) on hedged items	(2)	(5)	18	(12)
Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount	456	373	456	373
Activity related to cash flow hedges [Abstract]
Gain (loss) recognized in OCI	2	(1)	13	7
Gain (loss) reclassified into Cost of sales	8	3	13	4
Cash Flow Hedging [Member] | Foreign Currency Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount	441	347	441	347
Activity related to cash flow hedges [Abstract]
Gain (loss) recognized in OCI	2	(7)	13	(4)
Gain (loss) reclassified into Cost of sales	8	(1)	12	0
Cash Flow Hedging [Member] | Commodity Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount	15	26	15	26
Activity related to cash flow hedges [Abstract]
Gain (loss) recognized in OCI	0	6	0	11
Gain (loss) reclassified into Cost of sales	0	4	1	4
Net Investment Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount	795	823	795	823
Activity related to net investment hedges [Abstract]
Gain (loss) on instruments	(27)	(8)	(8)	4
Gain (loss) on hedged items	27	10	9	(7)
Net Investment Hedging [Member] | Foreign Currency Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount	557	527	557	527
Activity related to net investment hedges [Abstract]
Gain (loss) on instruments	(18)	(6)	(8)	2
Gain (loss) on hedged items	18	8	9	(5)
Net Investment Hedging [Member] | Foreign Currency Denominated Debt [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount	238	296	238	296
Activity related to net investment hedges [Abstract]
Gain (loss) on instruments	(9)	(2)	0	2
Gain (loss) on hedged items	9	2	0	(2)
Not Designated as Hedging Instrument [Member] | Cross-Currency Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount	96	96	96	96
Activity related to derivatives not designated as hedging instruments [Abstract]
Gain (loss) on instrument	(6)	(3)	0	(4)
Gain (loss) on hedged item	$ 6	$ 3	$ 0	$ 4