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Derivative Financial Instruments - Unrealized and Realized Gains (Losses) on Derivative Contracts (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Aug. 31, 2025	Aug. 31, 2024	Aug. 31, 2025	Aug. 31, 2024
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) recognized in interest expense on fair value hedge	$ (12,486)	$ (17,303)	$ (37,188)	$ (49,099)
Net settlements	12,300	16,200	36,400	48,200
Unrealized and realized gains (losses)	423,528	166,820	1,742,353	(20,115)
Interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized and realized gains (losses)	242	72,271	(30,970)	107,103
Foreign exchange contracts
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized and realized gains (losses)	(15,402)	15,760	1,309	48,289
Equity contracts
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized and realized gains (losses)	444,317	72,741	1,762,483	(186,617)
Commodity contracts
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized and realized gains (losses)	3,476	6,270	16,932	24,702
Credit contracts
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized and realized gains (losses)	(9,105)	(222)	(7,401)	(13,592)
Net investment hedging
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) on net investment hedges recognized in other comprehensive income (loss)	(3,238)	(38,878)	(77,370)	(47,686)
Net investment hedging | Foreign exchange contracts
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) on net investment hedges recognized in other comprehensive income (loss)	(3,238)	(38,878)	(77,370)	(47,686)
Long-term debt
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) recognized in interest expense on fair value hedge	(21,388)	(61,068)	(40,047)	(62,053)
Interest rate swaps
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) recognized in interest expense on fair value hedge	$ 8,902	$ 43,765	$ 2,859	$ 12,954

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