Variable Interest Entities - Variable Interests in Non-Consolidated Variable Interest Entities (Details) - USD ($) $ in Thousands	Aug. 31, 2022	Nov. 30, 2021
Variable Interest Entity [Line Items]
Assets	$ 51,182,848	$ 54,768,900
Liabilities	43,325,251	47,690,292
Nonconsolidated VIEs
Variable Interest Entity [Line Items]
Assets	2,332,100	1,798,800
Liabilities	100	2,000
Maximum Exposure to Loss	3,967,800	3,862,700
VIE Assets	36,039,200	26,367,800
Nonconsolidated VIEs | CLOs
Variable Interest Entity [Line Items]
Assets	501,900	582,200
Liabilities	100	2,000
Maximum Exposure to Loss	1,827,500	2,557,100
VIE Assets	9,128,900	10,277,500
Nonconsolidated VIEs | Asset-backed vehicles
Variable Interest Entity [Line Items]
Assets	468,400	281,900
Liabilities	0	0
Maximum Exposure to Loss	632,800	359,300
VIE Assets	4,488,000	3,474,600
Nonconsolidated VIEs | Related party private equity vehicles
Variable Interest Entity [Line Items]
Assets	29,600	27,100
Liabilities	0	0
Maximum Exposure to Loss	40,300	37,800
VIE Assets	82,700	78,900
Nonconsolidated VIEs | Other investment vehicles
Variable Interest Entity [Line Items]
Assets	1,332,200	907,600
Liabilities	0	0
Maximum Exposure to Loss	1,467,200	908,500
VIE Assets	$ 22,339,600	$ 12,536,800