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Product Warranties - Product Warranty (Detail) - USD ($)
$ in Millions
6 Months Ended
Mar. 26, 2016
Mar. 28, 2015
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]    
Balance at Beginning of Period $ 5.4 $ 6.3
Provisions 7.3 2.9
Settlements/ Adjustments (3.3) (3.5)
Balance at End of Period $ 9.4 $ 5.7