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Borrowings - Narrative (Details) - USD ($)
$ in Thousands
 9 Months Ended
Aug. 31, 2025
Nov. 30, 2024
Debt Instrument [Line Items]    
Interest rate on short-term borrowings outstanding 5.18% 6.25%
Increase of long-term debt $ 2,480,000  
Long-term debt 16,013,634 $ 13,530,565
Structured Notes    
Debt Instrument [Line Items]    
Net proceeds from long term debt 527,200  
Drawdown of Unsecured Credit Facility    
Debt Instrument [Line Items]    
Net proceeds from long term debt 350,000  
Unsecured Debt    
Debt Instrument [Line Items]    
Long-term debt 13,468,282 12,076,096
Net proceeds from long term debt 1,000,000  
Net repayments 775,400  
Unsecured Debt | Subsidiaries    
Debt Instrument [Line Items]    
Long-term debt 59,155 31,892
Secured Debt | Subsidiaries    
Debt Instrument [Line Items]    
Long-term debt 2,486,197 $ 1,422,577
Net proceeds from long term debt 1,010,000  
Foreign Currency Borrowing | Subsidiaries    
Debt Instrument [Line Items]    
Currency losses on foreign currency borrowings $ 326,400