Consolidated Statements of Financial Condition - USD ($) $ in Thousands	Aug. 31, 2024	Nov. 30, 2023
Assets
Cash and cash equivalents	$ 10,573,471	$ 8,526,363
Cash and securities segregated and on deposit for regulatory purposes or deposited with clearing and depository organizations (includes $68,966 and $110,198 of securities at fair value)	1,360,324	1,414,593
Financial instruments owned, at fair value (includes securities pledged of $17,691,280 and $17,158,747)	24,038,659	21,747,473
Investments in and loans to related parties	1,349,629	1,239,345
Securities borrowed	7,056,550	7,192,091
Securities purchased under agreements to resell	6,993,024	5,950,549
Securities received as collateral, at fair value	272,619	8,800
Receivables:
Brokers, dealers and clearing organizations	2,583,719	2,380,732
Customers	2,060,450	1,705,425
Fees, interest and other	661,038	630,142
Premises and equipment	1,229,028	1,065,680
Assets held for sale (includes pledged assets of $181,900 at fair value at November 30, 2023)	0	1,545,472
Goodwill	1,832,958	1,847,856
Other assets (includes assets pledged of $365,942 and $244,604)	3,263,629	2,650,640
Total assets	63,275,098	57,905,161
Liabilities and Equity
Short-term borrowings	1,725,864	989,715
Financial instruments sold, not yet purchased, at fair value	12,307,086	11,251,154
Securities loaned	2,550,101	1,840,518
Securities sold under agreements to repurchase	9,603,530	10,920,606
Other secured financings (includes $3,965 and $3,898 at fair value)	1,739,323	1,430,199
Obligation to return securities received as collateral, at fair value	272,619	8,800
Payables:
Brokers, dealers and clearing organizations	4,421,053	3,737,810
Customers	3,898,469	3,960,557
Lease liabilities	642,527	544,650
Liabilities held for sale	0	1,173,648
Accrued expenses and other liabilities	3,076,747	2,546,211
Long-term debt (includes $2,122,890 and $1,708,443 at fair value)	12,922,012	9,698,752
Total liabilities	53,159,331	48,102,620
Mezzanine Equity
Redeemable noncontrolling interests	406	406
Equity [Abstract]
Preferred shares, par value of $1 per share, authorized 70,000 shares; 55,125 and 42,000 shares issued and outstanding; liquidation preference of $17,500 per share	55	42
Additional paid-in capital	2,086,227	2,044,859
Accumulated other comprehensive loss	(369,965)	(395,545)
Retained earnings	8,124,134	7,849,844
Total Jefferies Financial Group Inc. shareholders’ equity	10,045,946	9,709,827
Noncontrolling interests	69,415	92,308
Total equity	10,115,361	9,802,135
Total liabilities and equity	63,275,098	57,905,161
Voting Common Stock
Equity [Abstract]
Common shares and Non-voting common shares	205,495	210,627
Nonvoting Common Stock
Equity [Abstract]
Common shares and Non-voting common shares	$ 0	$ 0