Fair Value Disclosures - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	May 31, 2022	May 31, 2021	May 31, 2022	May 31, 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	$ 51,300	$ 57,800	$ 64,700	$ 99,700
Transfers of assets from Level 3 to Level 2	11,700	21,800	25,000	46,100
Transfers of liabilities from Level 2 to Level 3	98,200	78,100	122,600	162,900
Transfers of liabilities from Level 3 to Level 2	28,000	154,700	44,000	17,300
Net gains/(losses) on Level 3 assets (realized and unrealized)	39,000	21,800	68,700	35,500
Net gains/(losses) on Level 3 liabilities (realized and unrealized)	159,200	(7,000)	332,300	(60,700)
Value of asset excluded from significant unobservable inputs	27,400		27,400		$ 14,300
Value of liability excluded from significant unobservable inputs	5,100		5,100		2,200
Aggregate fair value of loans and other receivables on nonaccrual status and/or 90 days or greater past due	164,400		164,400		56,900
Loans and other receivables greater than 90 days past due	33,300		33,300		$ 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	20,000	20,100	28,800	18,200
Net gains/(losses) on Level 3 assets (realized and unrealized)	877	6,557	254	9,695
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	15,100	20,900	9,700	58,300
Transfers of assets from Level 3 to Level 2	3,400			6,700
Net gains/(losses) on Level 3 assets (realized and unrealized)	(3,764)	1,981	(9,814)	4,312
Other ABS
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Transfers of assets from Level 2 to Level 3	15,800	13,500	14,000	10,500
Transfers of assets from Level 3 to Level 2		4,400	21,400	6,700
Net gains/(losses) on Level 3 assets (realized and unrealized)	(781)	3,575	835	6,373
Corporate debt securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Transfers of assets from Level 2 to Level 3			6,700
Transfers of assets from Level 3 to Level 2	3,600			17,500
Net gains/(losses) on Level 3 assets (realized and unrealized)	3,550	1,292	5,631	2,466
Net gains/(losses) on Level 3 liabilities (realized and unrealized)	3,588	22	11	(1,349)
Corporate equity securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Transfers of assets from Level 2 to Level 3			5,600	11,000
Transfers of assets from Level 3 to Level 2	3,100
Net gains/(losses) on Level 3 assets (realized and unrealized)	39,854	12,057	46,237	14,329
Net gains/(losses) on Level 3 liabilities (realized and unrealized)	234	(42)	3,592	(64)
Net derivatives
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Transfers of liabilities from Level 2 to Level 3	66,200	50,500	80,800	134,800
Transfers of liabilities from Level 3 to Level 2	20,000	154,200	5,000	17,300
Net gains/(losses) on Level 3 liabilities (realized and unrealized)	9,100	8,965	88,018	(16,813)
Structured notes
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Transfers of liabilities from Level 2 to Level 3	23,000	27,400	37,000	27,700
Transfers of liabilities from Level 3 to Level 2	3,300		38,900
Loans
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Transfers of liabilities from Level 2 to Level 3	9,100		4,800
Net gains/(losses) on Level 3 liabilities (realized and unrealized)	(10)	7	15	(1,441)
RMBS
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Transfers of assets from Level 3 to Level 2		15,300		14,700
Net gains/(losses) on Level 3 assets (realized and unrealized)	(47)	205	(111)	33
Commercial mortgage-backed securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Net gains/(losses) on Level 3 assets (realized and unrealized)	(439)	201	(463)	158
Net gains/(losses) on Level 3 liabilities (realized and unrealized)	$ 0	$ 0	$ 0	$ 0