Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies - Additional Information (Detail)

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Commitments and Contingencies - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Sep. 28, 2013
Sep. 29, 2012
Sep. 24, 2011
Commitments And Contingencies Disclosure [Abstract]      
Outstanding letters of credit $ 17.5    
Estimated annual purchase commitments for fiscal 2014 106.8    
Estimated annual purchase commitments for fiscal 2015 48.8    
Estimated annual purchase commitments for fiscal 2016 28.8    
Estimated annual purchase commitments for fiscal 2017 16.1    
Estimated annual purchase commitments for fiscal 2018 11.6    
Estimated annual purchase commitments for thereafter 6.6    
Minimum operating lease agreement terms 1 year    
Maximum operating lease agreement terms 9 years    
Operating lease rental expense $ 22.4 $ 23.6 $ 24.4