Fair Value of Financial Instruments - Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Millions	Jan. 31, 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	$ 378.3	$ 394.2
Insurance deposits	0.7	0.7
Assets held in funded deferred compensation plan	2.8	2.6
Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Credit facility	695.3	725.3
Interest rate swap liabilities	$ 12.7	$ 15.5