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Long-Term Debt - Summary of Long-Term Debt (Parenthetical) (Detail) - USD ($)
$ in Millions
Apr. 30, 2019
Mar. 29, 2019
Oct. 31, 2018
Jul. 18, 2018
Apr. 25, 2017
Term Loan [Member]          
Debt Instrument [Line Items]          
Debt issuance costs $ 2.3 $ 0.8 $ 1.9 $ 0.6 $ 2.0