Fair Value Disclosures - Summary of Gains (Losses) Due to Changes in Instrument Specific Credit Risk for Loans and Other Receivables and Loan Commitments Measured at Fair Value under Fair Value Option (Details) - USD ($) $ in Thousands	12 Months Ended
	Nov. 30, 2022	Nov. 30, 2021	Nov. 30, 2020
Financial instruments owned:
Loans and other receivables	$ (20,529)	$ 11,682	$ (25,623)
Loans
Financial instruments sold, not yet purchased, Long-term debt and Short-term borrowings
Changes in instrument specific credit risk	0	1,077	0
Loan commitments
Financial instruments sold, not yet purchased, Long-term debt and Short-term borrowings
Changes in instrument specific credit risk	0	0	464
Short-term borrowings:
Financial instruments sold, not yet purchased, Long-term debt and Short-term borrowings
Other changes in fair value	0	0	(48)
Other secured financings:
Financial instruments sold, not yet purchased, Long-term debt and Short-term borrowings
Other changes in fair value	695	650	2,475
Long-term debt:
Financial instruments sold, not yet purchased, Long-term debt and Short-term borrowings
Changes in instrument specific credit risk	63,344	(113,027)	70,201
Other changes in fair value	$ 345,050	$ 108,739	$ (84,116)