Summary of Significant Accounting Policies and Related Data - Debt Issuance Costs (Details) - USD ($)	12 Months Ended
	Oct. 31, 2020	Oct. 31, 2019
Debt Instrument [Line Items]
Maximum borrowing capacity under credit facility	$ 13,400,000	$ 13,300,000
Debt issuance costs, net	3,900,000	$ 4,500,000
Line of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity under credit facility	$ 600,000,000.0
Debt instrument, term (in years)	5 years