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Financial Instruments and Fair Value Disclosure (Narrative) (Details) - Financial Services - Mortgage servicing rights - Level 3
Nov. 30, 2022
Mortgage prepayment rate  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Mortgage servicing rights, key assumptions 0.08
Discount rate  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Mortgage servicing rights, key assumptions 0.13
Delinquency rate  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Mortgage servicing rights, key assumptions 0.07