Derivative Financial Instruments (Schedule Of Notional Amounts And Fair Values Of Derivative Instruments) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012		Dec. 31, 2011
Derivative [Line Items]
Notional amounts	$ 3,224	[1]	$ 3,631	[1]
Other assets	231		216
Net recorded balance, Other assets	178		155
Accrued liabilities	(137)		(192)
Net recorded balance, Accrued liabilities	(84)		(131)
Netting Arrangements [Member]
Derivative [Line Items]
Netting arrangements, Other assets	(53)		(61)
Netting arrangements, Accrued liabilities	53		61
Foreign Exchange Contracts [Member] | Derivatives Designated As Hedging Instruments [Member]
Derivative [Line Items]
Notional amounts	2,310	[1]	2,536	[1]
Other assets	202		185
Accrued liabilities	(16)		(33)
Foreign Exchange Contracts [Member] | Derivatives Not Receiving Hedge Accounting Treatment [Member]
Derivative [Line Items]
Notional amounts	412	[1]	605	[1]
Other assets	3		2
Accrued liabilities	(42)		(47)
Interest Rate Contracts [Member] | Derivatives Designated As Hedging Instruments [Member]
Derivative [Line Items]
Notional amounts	388	[1]	388	[1]
Other assets	26		29
Commodity Contracts [Member] | Derivatives Designated As Hedging Instruments [Member]
Derivative [Line Items]
Notional amounts	99	[1]	102	[1]
Accrued liabilities	(71)		(112)
Commodity Contracts [Member] | Derivatives Not Receiving Hedge Accounting Treatment [Member]
Derivative [Line Items]
Notional amounts	15	[1]
Accrued liabilities	$ (8)

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