Consolidated Statements of Changes in Equity - USD ($) $ in Thousands	Total		Total Jefferies Financial Group Inc. shareholders' equity	Preferred Stock	Preferred Stock Conversion Of Common Shares To Preferred Shares	Common Stock	Common Stock Conversion Of Preferred Shares To Common Shares	Common Stock Conversion Of Common Shares To Preferred Shares	Additional paid-in capital	Additional paid-in capital Conversion Of Preferred Shares To Common Shares	Additional paid-in capital Conversion Of Common Shares To Preferred Shares	Accumulated other comprehensive loss, net of tax	Retained earnings	Retained earnings Cumulative Effect, Period of Adoption, Adjustment	Noncontrolling interests	Noncontrolling interests Other Noncontrolling Interest
Balance, beginning of period at Nov. 30, 2021				$ 0		$ 243,541			$ 2,742,244			$ (372,143)	$ 7,940,113	$ 0	$ 25,885
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Conversion of shares					$ 0		$ 0	$ 0		$ 0	$ 0
Purchase of common shares for treasury						(25,595)			(833,998)
Share-based compensation expense									43,919
Change in fair value of redeemable noncontrolling interests									(1,147)
Dividend equivalents									0
Change in equity interest related to consolidated subsidiaries / vitesse energy									0						0
Other						8,184			16,763				0		1
Other comprehensive loss, net of tax	$ (7,276)	[1]										(7,276)
Net earnings attributable to Jefferies Financial Group Inc.													777,168
Dividends - common shares ($1.30, $1.20, and $1.20 per share)													(298,927)
Dividends - preferred shares													0
Distribution of Vitesse Energy, Inc.													0
Net losses attributable to noncontrolling interests	781,710														(2,397)
Contributions															64,880
Distributions															(2,629)
Deconsolidation of asset management company															(23,107)
Conversion of Vitesse Energy, Inc. redeemable noncontrolling interest																$ 0
Balance, end of period at Nov. 30, 2022	$ 10,295,479		$ 10,232,846	0		226,130			1,967,781			(379,419)	8,418,354	(14,813)	62,633
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accounting Standards Update [Extensible List]	Accounting Standards Update 2016-13 [Member]
Conversion of shares				42	42	(21,000)	4,654	(21,000)	52,400	120,346	52,458
Purchase of common shares for treasury						(4,887)			(164,515)
Share-based compensation expense									45,360
Change in fair value of redeemable noncontrolling interests									(390)
Dividend equivalents									24,140
Change in equity interest related to consolidated subsidiaries / vitesse energy									(6,307)						6,307
Other						5,730			5,986				332		341
Other comprehensive loss, net of tax	$ (16,126)	[1]										(16,126)
Net earnings attributable to Jefferies Financial Group Inc.													275,670
Dividends - common shares ($1.30, $1.20, and $1.20 per share)													(290,135)
Dividends - preferred shares	(12,600)												(12,600)
Distribution of Vitesse Energy, Inc.													(526,964)
Net losses attributable to noncontrolling interests	262,388														(14,846)
Contributions															78,247
Distributions															(31,433)
Deconsolidation of asset management company															(14,895)
Conversion of Vitesse Energy, Inc. redeemable noncontrolling interest																5,954
Balance, end of period at Nov. 30, 2023	$ 9,802,135		9,709,827	42		210,627			2,044,859			(395,545)	7,849,844	$ (644)	92,308
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accounting Standards Update [Extensible List]	Accounting Standards Update 2016-13 [Member]
Conversion of shares					$ 13		$ 0	$ (6,562)		$ 0	$ 16,393
Purchase of common shares for treasury						(1,089)			(43,223)
Share-based compensation expense									63,119
Change in fair value of redeemable noncontrolling interests									0
Dividend equivalents									19,016
Change in equity interest related to consolidated subsidiaries / vitesse energy									(2,631)						0
Other						2,528			6,666				(458)		6,639
Other comprehensive loss, net of tax	$ (27,586)	[1]										(27,586)
Net earnings attributable to Jefferies Financial Group Inc.													743,383
Dividends - common shares ($1.30, $1.20, and $1.20 per share)													(290,086)
Dividends - preferred shares	(31,900)												(31,894)
Distribution of Vitesse Energy, Inc.													0
Net losses attributable to noncontrolling interests	716,019														(27,364)
Contributions															10,039
Distributions															(13,407)
Deconsolidation of asset management company															0
Conversion of Vitesse Energy, Inc. redeemable noncontrolling interest																$ 0
Balance, end of period at Nov. 30, 2024	$ 10,224,987		$ 10,156,772	$ 55		$ 205,504			$ 2,104,199			$ (423,131)	$ 8,270,145		$ 68,215
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accounting Standards Update [Extensible List]	Accounting Standards Update 2016-13 [Member]

[1] Includes unrealized losses of $2.2 million for the year ended November 30, 2024 related to currency translation adjustments attributable to noncontrolling interests.