Fair Value Disclosures - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Feb. 28, 2022	Feb. 28, 2021	Nov. 30, 2021
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Transfers of assets from Level 2 to Level 3	$ 64,800	$ 75,800
Transfers of assets from Level 3 to Level 2	40,500	44,700
Transfers of liabilities from Level 2 to Level 3	72,600	236,700
Transfers of liabilities from Level 3 to Level 2	72,100	13,300
Net gains/(losses) on Level 3 assets (realized and unrealized)	30,000	12,700
Net gains/(losses) on Level 3 liabilities (realized and unrealized)	161,400	(72,100)
Value of asset excluded from significant unobservable inputs	39,500		$ 14,300
Value of liability excluded from significant unobservable inputs	13,400		2,200
Aggregate fair value of loans and other receivables on nonaccrual status and/or 90 days or greater past due	42,000		56,900
Loans and other receivables greater than 90 days past due	11,900		$ 23,500
CDOs and CLOs
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Transfers of assets from Level 2 to Level 3	18,800	14,600
Transfers of assets from Level 3 to Level 2	9,000
Net gains/(losses) on Level 3 assets (realized and unrealized)	(671)	3,840
Loans and other receivables
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Transfers of assets from Level 2 to Level 3	16,100	42,900
Transfers of assets from Level 3 to Level 2	2,400	6,800
Net gains/(losses) on Level 3 assets (realized and unrealized)	(4,737)	1,642
Other ABS
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Transfers of assets from Level 2 to Level 3	12,900	7,500
Transfers of assets from Level 3 to Level 2	28,900	14,500
Net gains/(losses) on Level 3 assets (realized and unrealized)	2,033	2,361
Corporate debt securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Transfers of assets from Level 2 to Level 3	9,400
Transfers of assets from Level 3 to Level 2		17,500
Transfers of liabilities from Level 2 to Level 3	12,400
Net gains/(losses) on Level 3 assets (realized and unrealized)	(1,176)	266
Net gains/(losses) on Level 3 liabilities (realized and unrealized)	8,866	(1,430)
Corporate equity securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Transfers of assets from Level 2 to Level 3	7,400	9,900
Net gains/(losses) on Level 3 assets (realized and unrealized)	7,325	1,309
Net gains/(losses) on Level 3 liabilities (realized and unrealized)	3,447	(9)
Net derivatives
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Transfers of liabilities from Level 2 to Level 3	27,900	236,500
Transfers of liabilities from Level 3 to Level 2	28,100	13,300
Net gains/(losses) on Level 3 liabilities (realized and unrealized)	54,836	(43,727)
Structured notes
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Transfers of liabilities from Level 2 to Level 3	25,800
Transfers of liabilities from Level 3 to Level 2	44,000
Loans
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Transfers of liabilities from Level 2 to Level 3	6,200
Net gains/(losses) on Level 3 liabilities (realized and unrealized)	$ 46	$ (1,559)