Fair Value Measurements and Financial Instruments (Details 3) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Fair Value Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount	$ 2,369	$ 2,423
Activity related to fair value hedges [Abstract]
Gain (loss) on derivative	(8)	5
Gain (loss) on hedged items	8	(5)
Fair Value Hedging [Member] | Foreign Currency Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount	681	1,085
Activity related to fair value hedges [Abstract]
Gain (loss) on derivative	2	12
Gain (loss) on hedged items	(2)	(12)
Fair Value Hedging [Member] | Interest Rate Swap Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount	1,688	1,338
Activity related to fair value hedges [Abstract]
Gain (loss) on derivative	(10)	(7)
Gain (loss) on hedged items	10	7
Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount	416	498
Activity related to cash flow hedges [Abstract]
Gain (loss) recognized in OCI	2	7
Gain (loss) reclassified into Cost of sales	3	4
Cash Flow Hedging [Member] | Foreign Currency Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount	401	446
Activity related to cash flow hedges [Abstract]
Gain (loss) recognized in OCI	0	8
Gain (loss) reclassified into Cost of sales	2	3
Cash Flow Hedging [Member] | Commodity Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount	15	52
Activity related to cash flow hedges [Abstract]
Gain (loss) recognized in OCI	2	(1)
Gain (loss) reclassified into Cost of sales	1	1
Net Investment Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount	936	911
Activity related to net investment hedges [Abstract]
Gain (loss) on instruments	1	27
Gain (loss) on hedged items	0	(26)
Net Investment Hedging [Member] | Foreign Currency Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount	680	536
Activity related to net investment hedges [Abstract]
Gain (loss) on instruments	0	14
Gain (loss) on hedged items	1	(13)
Net Investment Hedging [Member] | Foreign Currency Denominated Debt [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount	256	375
Activity related to net investment hedges [Abstract]
Gain (loss) on instruments	1	13
Gain (loss) on hedged items	(1)	(13)
Not Designated as Hedging Instrument [Member] | Cross-Currency Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount	96	96
Activity related to derivatives not designated as hedging instruments [Abstract]
Gain (loss) on instrument	(1)	6
Gain (loss) on hedged item	$ 1	$ (6)