Derivative Financial Instruments (Schedule Of Notional Amounts And Fair Values Of Derivative Instruments) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012		Dec. 31, 2011
Derivative [Line Items]
Notional amounts	$ 3,129	[1]	$ 3,631	[1]
Other assets	241		216
Netting arrangements, Other assets	(79)		(61)
Derivatives, Assets	162		155
Accrued liabilities	(173)		(192)
Netting arrangements, Accrued liabilities	79		61
Derivatives, Liabilities	(94)		(131)
Derivatives Designated As Hedging Instruments [Member] | Foreign Exchange Contracts [Member]
Derivative [Line Items]
Notional amounts	2,079	[1]	2,536	[1]
Other assets	211		185
Accrued liabilities	(16)		(33)
Derivatives Designated As Hedging Instruments [Member] | Interest Rate Contract [Member]
Derivative [Line Items]
Notional amounts	388	[1]	388	[1]
Other assets	30		29
Accrued liabilities
Derivatives Designated As Hedging Instruments [Member] | Commodity Contracts [Member]
Derivative [Line Items]
Notional amounts	72	[1]	102	[1]
Accrued liabilities	(84)		(112)
Derivatives Not Receiving Hedge Accounting Treatment [Member] | Foreign Exchange Contracts [Member]
Derivative [Line Items]
Notional amounts	578	[1]	605	[1]
Other assets			2
Accrued liabilities	(67)		(47)
Derivatives Not Receiving Hedge Accounting Treatment [Member] | Commodity Contracts [Member]
Derivative [Line Items]
Notional amounts	12	[1]
Accrued liabilities	$ (6)

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