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Product Warranties - Product Warranty Activity (Detail) - USD ($)
$ in Millions
9 Months Ended
Jun. 26, 2021
Jun. 27, 2020
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]    
Balance at Beginning of Period $ 9.9 $ 13.9
Provisions 6.1 8.0
Standard and Extended Product Warranty Accrual, Additions from Business Acquisition 0.3 0.5
Standard Product Warranty Accrual, Period Increase (Decrease) 0.0 (6.1)
Settlements/ Adjustments (6.7) (7.2)
Balance at End of Period $ 9.6 $ 9.1