Derivative Financial Instruments (Schedule Of Derivative Instruments, Gains/(Losses) In Statement Of Financial Performance) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Foreign Exchange Contracts [Member]
Derivative [Line Items]
Undesignated derivatives recognized in Other income/ (expense), net	$ (21)	$ (33)
Cash Flow Hedging [Member] | Foreign Exchange Contracts [Member]
Derivative [Line Items]
Effective portion recognized in other comprehensive loss, net of taxes	12	67
Effective portion reclassified out of Accumulated other comprehensive loss into earnings, net of taxes	42	25
Forward points recognized in other income/(expense), net	37	(3)
Cash Flow Hedging [Member] | Commodity Contracts [Member]
Derivative [Line Items]
Effective portion recognized in other comprehensive loss, net of taxes	(25)	(30)
Effective portion reclassified out of Accumulated other comprehensive loss into earnings, net of taxes	$ (26)	$ (16)