Quarterly report pursuant to Section 13 or 15(d)

Hedging Transactions And Derivative Financial Instruments (Schedule Of Fair Value Assets And Liabilities Relating To Foreign Currency Forward Contracts) (Details)

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Hedging Transactions And Derivative Financial Instruments (Schedule Of Fair Value Assets And Liabilities Relating To Foreign Currency Forward Contracts) (Details) (Contracts Designated As Cash Flow Hedging Instruments [Member], Foreign Currency Forward Contracts [Member], USD $)
In Millions, unless otherwise specified
Mar. 31, 2012
Dec. 31, 2011
Contracts Designated As Cash Flow Hedging Instruments [Member] | Foreign Currency Forward Contracts [Member]
   
Hedging Transactions And Derivative Financial Instruments [Line Items]    
Contracts designated as cash flow hedging instruments $ 1 $ (2)