Income Taxes - Schedule of Reconciliation of Expected Statutory Federal Income Tax to Actual Income Tax Provision (Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Nov. 30, 2022	Nov. 30, 2021		Nov. 30, 2020
Amount
Computed expected federal income taxes	$ 221,668	$ 473,362		$ 224,087
State and local income taxes, net of Federal income tax benefit	47,364	96,884		45,457
International operations (including foreign rate differential)	18,711	18,073		13,155
Non-deductible executive compensation	12,596	20,359		12,814
Foreign tax credits, net	(20,368)	(13,963)		(8,654)
Employee share-based awards	(37,988)	893		209
Regulatory Settlement	20,184	0		0
Change in unrecognized tax benefits related to prior years	(16,915)	(27,374)		(4,522)
Interest on unrecognized tax benefits	13,902	8,651		15,600
Other, net	14,698	(156)		527
Total income tax expense	$ 273,852	$ 576,729	[1]	$ 298,673	[1]
Percent
Computed expected federal income taxes	21.00%	21.00%		21.00%
State and local income taxes, net of Federal income tax benefit	4.50%	4.30%		4.30%
International operations (including foreign rate differential)	1.80%	0.80%		1.20%
Non-deductible executive compensation	1.20%	0.90%		1.20%
Foreign tax credits, net	(1.90%)	(0.60%)		(0.80%)
Employee share-based awards	(3.60%)	0.00%		0.00%
Regulatory Settlement	1.90%	0.00%		0.00%
Change in unrecognized tax benefits related to prior years	(1.70%)	(1.20%)		(0.50%)
Interest on unrecognized tax benefits	0.013	0.004		0.015
Other, net	1.40%	0.00%		0.10%
Total income tax expense, percent	25.90%	25.60%		28.00%

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