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Fair Values of Derivative Instruments Reported on Condensed Consolidated Balance Sheet (Detail) (USD $)
In Millions, unless otherwise specified
Jun. 29, 2012
Sep. 30, 2011
Derivatives, Fair Value    
Foreign exchange forward contracts designated as hedging instruments, fair value of asset derivatives $ 0.4 $ 0
Foreign exchange forward contracts not designated as hedging instruments, fair value of asset derivatives 0.2 0
Total asset derivatives 0.6 0
Foreign exchange forward contracts designated as hedging instruments, fair value of liability derivatives 0 0
Foreign exchange forward contracts not designated as hedging instruments, fair value of liability derivatives 0 0
Total liability derivatives $ 0 $ 0