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Fair Value of Financial Instruments - Narrative (Details) - USD ($)
3 Months Ended 12 Months Ended
Jul. 31, 2021
Oct. 31, 2021
Oct. 31, 2020
Oct. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Impairment loss on fixed assets   $ 9,100,000 $ 0 $ 0
Carrying value of fixed assets   111,900,000 $ 133,700,000  
Corporate | Internal Use Software        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Impairment loss on fixed assets $ 9,100,000      
Carrying value of fixed assets   $ 0