Variable Interest Entities - Variable Interests in Non-Consolidated Variable Interest Entities (Details) - USD ($) $ in Thousands	Nov. 30, 2022	Nov. 30, 2021
Variable Interest Entity [Line Items]
Total assets	$ 51,057,683	$ 56,107,311	[1]
Total liabilities	40,630,743	45,377,271	[1]
Variable interest entity, not primary beneficiary
Variable Interest Entity [Line Items]
Total assets	1,986,700	2,102,200
Total liabilities	1,400	2,000
Maximum Exposure to Loss	3,717,200	4,255,300
VIE Assets	31,512,800	29,320,300
Variable interest entity, not primary beneficiary | CLOs
Variable Interest Entity [Line Items]
Total assets	133,500	582,200
Total liabilities	1,400	2,000
Maximum Exposure to Loss	1,642,500	2,557,100
VIE Assets	7,705,300	10,277,500
Variable interest entity, not primary beneficiary | Asset-backed vehicles
Variable Interest Entity [Line Items]
Total assets	561,000	281,900
Total liabilities	0	0
Maximum Exposure to Loss	690,400	359,300
VIE Assets	4,408,300	3,474,600
Variable interest entity, not primary beneficiary | Related party private equity vehicles
Variable Interest Entity [Line Items]
Total assets	24,800	27,100
Total liabilities	0	0
Maximum Exposure to Loss	35,500	37,800
VIE Assets	69,100	78,900
Variable interest entity, not primary beneficiary | Other investment vehicles
Variable Interest Entity [Line Items]
Total assets	1,172,600	1,111,500
Total liabilities	0	0
Maximum Exposure to Loss	1,254,000	1,201,600
VIE Assets	18,940,500	15,101,400
Variable interest entity, not primary beneficiary | FXCM
Variable Interest Entity [Line Items]
Total assets	94,800	99,500
Total liabilities	0	0
Maximum Exposure to Loss	94,800	99,500
VIE Assets	$ 389,600	$ 387,900

[1] See Note 1 for a description of financial statement presentation changes made as a result of our Merger with Jefferies Group.