Accumulated Other Comprehensive Income (Loss) - Schedule of Accumulated Other Comprehensive Income Reclassifications (Details) - USD ($) $ in Thousands	12 Months Ended
	Nov. 30, 2022	Nov. 30, 2021		Nov. 30, 2020
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Revenues	$ 7,149,263	$ 8,945,464	[1]	$ 6,880,447	[1]
Selling, general and other expenses, which includes pension expense	(2,589,044)	(3,554,760)	[1]	(2,944,071)	[1]
Total reclassifications for the period, net of tax	(781,710)	(1,677,376)	[1]	(768,410)	[1]
Principal transactions
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Revenues	833,757	1,617,336	[1]	1,928,143	[1]
Net unrealized gains (losses) on instrument specific credit risk at fair value, net of income tax benefit (expense) of $41, $(599), and $(146), respectively
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassification for the period, tax	41	(599)		(146)
Net minimum pension liability
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassification for the period, tax	845	1,054		957
Amount Reclassified from Accumulated Other Comprehensive Income (Loss)
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total reclassifications for the period, net of tax	(2,612)	(1,277)		(2,475)
Amount Reclassified from Accumulated Other Comprehensive Income (Loss) | Net unrealized gains (losses) on instrument specific credit risk at fair value, net of income tax benefit (expense) of $41, $(599), and $(146), respectively | Principal transactions
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Revenues	(129)	1,861		397
Amount Reclassified from Accumulated Other Comprehensive Income (Loss) | Net minimum pension liability
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Selling, general and other expenses, which includes pension expense	$ (2,483)	$ (3,138)		$ (2,872)

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