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Product Warranties - Product Warranty (Detail) - USD ($)
$ in Millions
9 Months Ended
Jun. 27, 2015
Jun. 28, 2014
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]    
Balance at Beginning of Period $ 6.3 $ 9.3
Provisions 4.4 5.5
Settlements/ Adjustments (5.1) (7.5)
Balance at End of Period $ 5.6 $ 7.3