Accumulated Other Comprehensive Income (Loss) - Summary of Accumulated Other Comprehensive Income, Net of Taxes (Details) - USD ($) $ in Thousands	Nov. 30, 2022	Nov. 30, 2021		Nov. 30, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total accumulated other comprehensive loss	$ 10,295,479	$ 10,579,640	[1]	$ 9,438,525
Net unrealized gains (losses) on available for sale securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total accumulated other comprehensive loss	(5,892)	269		513
Net unrealized foreign exchange losses
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total accumulated other comprehensive loss	(220,071)	(166,499)		(156,718)
Net unrealized losses related to instrument specific credit risk
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total accumulated other comprehensive loss	(104,526)	(153,672)		(71,151)
Net minimum pension liability
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total accumulated other comprehensive loss	(48,930)	(52,241)		(61,561)
Total accumulated other comprehensive loss
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total accumulated other comprehensive loss	$ (379,419)	$ (372,143)		$ (288,917)

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