Fair Value Measurements and Financial Instruments (Details 3) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Fair Value Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount	$ 2,338	$ 2,078	$ 2,338	$ 2,078
Activity related to fair value hedges [Abstract]
Gain (loss) on derivative	(13)	18	(8)	17
Gain (loss) on hedged items	13	(18)	8	(17)
Fair Value Hedging [Member] | Foreign Currency Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount	1,250	740	1,250	740
Activity related to fair value hedges [Abstract]
Gain (loss) on derivative	0	9	12	10
Gain (loss) on hedged items	0	(9)	(12)	(10)
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	(13)	9	(20)	7
Gain (loss) on hedged items	13	(9)	20	(7)
Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount	432	378	432	378
Activity related to cash flow hedges [Abstract]
Gain (loss) recognized in OCI	4	0	11	8
Gain (loss) reclassified into Cost of sales	1	1	5	1
Cash Flow Hedging [Member] | Foreign Currency Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount	420	349	420	349
Activity related to cash flow hedges [Abstract]
Gain (loss) recognized in OCI	3	(3)	11	3
Gain (loss) reclassified into Cost of sales	1	0	4	1
Cash Flow Hedging [Member] | Commodity Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount	12	29	12	29
Activity related to cash flow hedges [Abstract]
Gain (loss) recognized in OCI	1	3	0	5
Gain (loss) reclassified into Cost of sales	0	1	1	0
Net Investment Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount	917	972	917	972
Activity related to net investment hedges [Abstract]
Gain (loss) on instruments	(8)	37	19	12
Gain (loss) on hedged items	8	(37)	(18)	(17)
Net Investment Hedging [Member] | Foreign Currency Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount	538	563	538	563
Activity related to net investment hedges [Abstract]
Gain (loss) on instruments	(4)	27	10	8
Gain (loss) on hedged items	4	(27)	(9)	(13)
Net Investment Hedging [Member] | Foreign Currency Denominated Debt [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount	379	409	379	409
Activity related to net investment hedges [Abstract]
Gain (loss) on instruments	(4)	10	9	4
Gain (loss) on hedged items	4	(10)	(9)	(4)
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	0	2	6	(1)
Gain (loss) on hedged item	$ 0	$ (2)	$ (6)	$ 1