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COMMITMENTS AND CONTINGENCIES - Accrued Product Warranty (Detail) - USD ($)
$ in Millions
3 Months Ended
Dec. 28, 2018
Dec. 29, 2017
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]    
Accrued product warranty, at beginning of period $ 44.8 $ 41.3
Charged to cost of revenues 13.3 14.4
Actual product warranty expenditures (11.8) (8.6)
Accrued product warranty, at end of period $ 46.3 $ 47.1