Derivative Financial Instruments (Schedule Of Notional Amounts And Fair Values Of Derivative Instruments) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011		Dec. 31, 2010
Derivative [Line Items]
Derivatives, notional amounts	$ 3,631	[1]	$ 3,666	[1]
Total derivatives, assets	216		298
Net recorded balance, assets	155		227
Net recorded balance, liabilities	(131)		(115)
Total derivatives, liabilities	(192)		(186)
Derivatives Designated As Hedging Instruments [Member] | Foreign Exchange Contracts [Member]
Derivative [Line Items]
Derivatives, notional amounts	2,536	[1]	2,001	[1]
Total derivatives, assets	185		266
Total derivatives, liabilities	(33)		(15)
Derivatives Designated As Hedging Instruments [Member] | Interest Rate Contracts [Member]
Derivative [Line Items]
Derivatives, notional amounts	388	[1]	875	[1]
Total derivatives, assets	29		24
Derivatives Designated As Hedging Instruments [Member] | Commodity Contracts [Member]
Derivative [Line Items]
Derivatives, notional amounts	102	[1]	144	[1]
Total derivatives, liabilities	(112)		(113)
Derivatives Not Receiving Hedge Accounting Treatment [Member] | Foreign Exchange Contracts [Member]
Derivative [Line Items]
Derivatives, notional amounts	605	[1]	646	[1]
Total derivatives, assets	2		8
Total derivatives, liabilities	(47)		(58)
Netting Arrangements [Member]
Derivative [Line Items]
Netting arrangements, assets	(61)		(71)
Netting arrangements, liabilities	$ 61		$ 71

[1] Notional amounts represent the gross contract/notional amount of the derivatives outstanding.