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Fair Value Of Assets And Liabilities Narrative (Details) (Financial assets and liabilities measured on a recurring basis, USD $)
In Millions, unless otherwise specified
Jun. 29, 2012
Sep. 30, 2011
Estimate of Fair Value, Fair Value Disclosure
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value of debt $ 5,784.3 $ 5,505.7
Carrying (Reported) Amount, Fair Value Disclosure
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Carrying value of debt $ 5,782.0 $ 5,637.7