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Derivative Instruments (Narrative) (Details) (USD $)
9 Months Ended 12 Months Ended
Jul. 10, 2011
Oct. 03, 2010
Aug. 31, 2010
Apr. 30, 2010
Derivative Instruments        
Interest rate derivatives held     2 2
Converted fixed-rate term loan borrowings     $ 100,000,000 $ 200,000,000
Interest rate swaps hedge ineffectiveness $ 0 $ 0