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Credit Facility - Term Loan Maturities (Details)
$ in Millions
3 Months Ended 6 Months Ended
Apr. 30, 2021
USD ($)
Apr. 30, 2021
USD ($)
Debt Instrument [Line Items]    
Debt instrument, periodic payment, principal $ 30.0 $ 60.0
Term Loan    
Term Loan Maturities    
Debt maturities, 2021 60.0 60.0
Debt maturities, 2022 $ 560.0 $ 560.0