Borrowings - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Feb. 28, 2025	Nov. 30, 2024
Debt Instrument [Line Items]
Interest rate on short-term borrowings outstanding	4.95%	6.25%
Increase (decrease) of long-term debt	$ 1,250,000
Long-term debt	14,785,553	$ 13,530,565
Structured Notes
Debt Instrument [Line Items]
Net proceeds from long term debt	275,700
Structured Notes | Subsidiaries
Debt Instrument [Line Items]
Net proceeds from long term debt	56,600
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	12,745,317	12,076,096
Net proceeds from long term debt	216,900
Net repayments	82,900
Unsecured Debt | Subsidiaries
Debt Instrument [Line Items]
Long-term debt	32,856	31,892
Secured Debt | Subsidiaries
Debt Instrument [Line Items]
Long-term debt	2,007,380	$ 1,422,577
Net proceeds from long term debt	$ 595,100