Derivative Financial Instruments (Schedule Of Notional Amounts And Fair Values Of Derivative Instruments) (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Derivative [Line Items]
Notional amounts	$ 3,314	$ 3,631
Other assets	203	216
Netting arrangements, Other assets	(74)	(61)
Net recorded balance, Other assets	129	155
Accrued liabilities	(198)	(192)
Netting arrangements, Accrued liabilities	74	61
Net recorded balance, Accrued liabilities	(124)	(131)
Derivatives Designated As Hedging Instruments [Member] | Foreign Exchange Contracts [Member]
Derivative [Line Items]
Notional amounts	2,332	2,536
Other assets	173	185
Accrued liabilities	(33)	(33)
Derivatives Designated As Hedging Instruments [Member] | Interest Rate Contracts [Member]
Derivative [Line Items]
Notional amounts	388	388
Other assets	30	29
Accrued liabilities
Derivatives Designated As Hedging Instruments [Member] | Commodity Contracts [Member]
Derivative [Line Items]
Notional amounts	65	102
Other assets
Accrued liabilities	(97)	(112)
Derivatives Not Receiving Hedge Accounting Treatment [Member] | Foreign Exchange Contracts [Member]
Derivative [Line Items]
Notional amounts	516	605
Other assets		2
Accrued liabilities	(61)	(47)
Derivatives Not Receiving Hedge Accounting Treatment [Member] | Commodity Contracts [Member]
Derivative [Line Items]
Notional amounts	13
Accrued liabilities	$ (7)