Variable Interest Entities - Variable Interests in Non-Consolidated Variable Interest Entities (Details) - USD ($) $ in Thousands	Feb. 28, 2022	Nov. 30, 2021
Variable Interest Entity [Line Items]
Assets	$ 55,899,398	$ 54,768,900
Liabilities	48,132,387	47,690,292
Nonconsolidated VIEs
Variable Interest Entity [Line Items]
Assets	2,602,900	1,798,800
Liabilities	2,900	2,000
Maximum Exposure to Loss	5,381,200	3,862,700
VIE Assets	28,243,800	26,367,800
Nonconsolidated VIEs | CLOs
Variable Interest Entity [Line Items]
Assets	851,100	582,200
Liabilities	2,900	2,000
Maximum Exposure to Loss	3,500,200	2,557,100
VIE Assets	8,461,200	10,277,500
Nonconsolidated VIEs | Asset-backed vehicles
Variable Interest Entity [Line Items]
Assets	485,800	281,900
Liabilities	0	0
Maximum Exposure to Loss	510,600	359,300
VIE Assets	5,022,500	3,474,600
Nonconsolidated VIEs | Related party private equity vehicles
Variable Interest Entity [Line Items]
Assets	26,200	27,100
Liabilities	0	0
Maximum Exposure to Loss	36,900	37,800
VIE Assets	74,700	78,900
Nonconsolidated VIEs | Other investment vehicles
Variable Interest Entity [Line Items]
Assets	1,239,800	907,600
Liabilities	0	0
Maximum Exposure to Loss	1,333,500	908,500
VIE Assets	$ 14,685,400	$ 12,536,800