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Financial Instruments and Fair Value Disclosures - (Mortgage Servicing Rights Unobservable Inputs) (Details) - Financial Services - Level 3
Aug. 31, 2021
Nov. 30, 2020
Mortgage prepayment rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable inputs for valuation of mortgage servicing rights 0.14 0.18
Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable inputs for valuation of mortgage servicing rights 0.14 0.12
Delinquency rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Unobservable inputs for valuation of mortgage servicing rights 0.03 0.04