Financial Instruments Pre-Tax Effect Of Foreign Exchange Contracts Designated As Other Derivatives (Details) (Foreign Exchange Contract [Member], USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Foreign Currency Derivative Instruments Not Designated as Hedging Instruments	$ (186)	$ (157)	$ (124)	$ 138
Amount of gain (loss) recognized in earnings	5	11	6	14
Marketing, Administration And Research Costs [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) recognized in earnings	0	0	0	0
Marketing, Administration And Research Costs [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) recognized in earnings	0	0	0	0
Interest Expense, Net [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) recognized in earnings	(10)	3	(24)	(2)
Interest Expense, Net [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) recognized in earnings	$ 5	$ 11	$ 6	$ 14