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Product Warranties (Changes In Product Warranty Liability) (Detail)
$ in Millions
3 Months Ended
Mar. 29, 2019
USD ($)
Movement in Standard Product Warranty Accrual [Roll Forward]  
Balance as of fiscal year end 2018 $ 15.3
Accruals for warranties issued 3.4
Changes in estimates 0.3
Warranty settlements (in cash or in kind) (4.9)
Balance as of the end of the first quarter of fiscal 2019 $ 14.1