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Schedule II - Valuation and Qualifying Accounts (Detail) - USD ($)
$ in Millions
 12 Months Ended
Mar. 30, 2019
Mar. 31, 2018
Apr. 01, 2017
Allowance for Doubtful Accounts [Member]      
Valuation And Qualifying Accounts Disclosure [Line Items]      
Balance at Beginning of Period $ 0.2 $ 0.9 $ 0.8
Additions 0.5 0.1 0.7
Deductions (0.1) (0.8) (0.6)
Balance at End of Period 0.6 0.2 0.9
Valuation Allowance for Deferred Taxes [Member]      
Valuation And Qualifying Accounts Disclosure [Line Items]      
Balance at Beginning of Period 6.4 15.0 50.4
Additions 0.3 0.3 0.5
Deductions (1.3) (8.9) (35.9)
Other 1.9    
Balance at End of Period $ 7.3 $ 6.4 $ 15.0