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Fair Value of Financial Instruments - Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - Fair Value, Measurements, Recurring - USD ($)
$ in Millions
Apr. 30, 2021
Oct. 31, 2020
Fair Value, Inputs, Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash and cash equivalents $ 435.7 $ 394.2
Insurance deposits 0.7 0.7
Assets held in funded deferred compensation plan 2.9 2.6
Fair Value, Inputs, Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Credit facility 645.1 725.3
Interest rate swap liabilities $ 9.5 $ 15.5