Total Equity - Schedule of Accumulated Other Comprehensive Income Reclassifications (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Aug. 31, 2024	Aug. 31, 2023	Aug. 31, 2024	Aug. 31, 2023
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Revenues	$ 2,595,589	$ 2,040,915	$ 7,663,827	$ 5,472,661
Compensation and benefits	(889,098)	(644,059)	(2,677,962)	(1,922,985)
Net earnings	181,039	53,947	492,118	191,955
Income tax expense	(78,011)	(37,124)	(207,077)	(75,053)
Principal transactions
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Revenues	324,501	353,373	1,381,432	1,171,578
Amount Reclassified from Accumulated Other Comprehensive Income (Loss)
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net earnings	83	(29)	2,536	(739)
Amount Reclassified from Accumulated Other Comprehensive Income (Loss) | Net unrealized losses related to instrument-specific credit risk
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income tax expense	(100)		(1,000)	100
Amount Reclassified from Accumulated Other Comprehensive Income (Loss) | Net unrealized losses related to instrument-specific credit risk | Principal transactions
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Revenues	150	13	2,783	(151)
Amount Reclassified from Accumulated Other Comprehensive Income (Loss) | Net minimum pension liability
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Compensation and benefits	$ (67)	$ (42)	(247)	(588)
Income tax expense			$ 100	$ 100