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Financial Instruments (Schedule Of Location And Amounts Of Gains And Losses On The Derivative Instrument Designated As A Fair Value Hedge) (Details) (Interest Rate Swap Contract [Member], Interest Expense [Member], USD $)
In Millions
3 Months Ended9 Months Ended
Sep. 30, 2011
Sep. 30, 2011
Interest Rate Swap Contract [Member] | Interest Expense [Member]
  
Gain Recognized on Swap$ 7.7$ 11.7
(Loss) Recognized on Long-Term Debt$ (7.7)$ (11.7)