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Product Warranties - Product Warranty (Detail) - USD ($)
$ in Millions
6 Months Ended
Apr. 01, 2017
Mar. 26, 2016
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]    
Balance at Beginning of Period $ 5.0 $ 5.4
Provisions 4.6 7.3
Standard and Extended Product Warranty Accrual, Additions from Business Acquisition 9.9 0.0
Settlements/ Adjustments (4.1) (3.3)
Balance at End of Period $ 15.4 $ 9.4