Schedule I (PARENT COMPANY ONLY) - CONDENSED STATEMENTS OF CASH FLOWS (Details) - USD ($) $ in Thousands	12 Months Ended
	Nov. 30, 2022	Nov. 30, 2021		Nov. 30, 2020
Cash flows from operating activities:
Net earnings	$ 781,710	$ 1,677,376	[1]	$ 768,410	[1]
Adjustments to reconcile net earnings to net cash provided by (used in) operating activities:
Deferred income taxes	(70,396)	96,890		64,667
Share-based compensation	43,919	78,160		40,038
(Income) loss on investments in and loans to related parties	36,287	(149,885)		75,177
Other adjustments	(601,303)	(89,004)		320,611
Net change in assets and liabilities:
Financial instruments owned	(773,523)	(1,314,603)		(877,088)
Other assets	(230,722)	(225,916)		167,889
Financial instruments sold, not yet purchased	1,875,957	992,199		(1,014,535)
Accrued expenses and other liabilities	(715,432)	527,910		1,179,136
Net cash provided by operating activities	1,804,849	1,582,290		2,055,439
Cash flows from investing activities:
Contributions to investments in and loans to related parties	(351,645)	(2,339,447)		(1,666,323)
Capital distributions from investments and repayments of loans from related parties	286,578	2,310,186		1,552,161
Originations and purchases of automobile loans, notes and other receivables	(527,929)	(611,486)		(813,867)
Other	8,641	(1,174)		4,215
Net cash used in investing activities	(60,539)	(409,865)		(165,683)
Cash flows from financing activities:
Proceeds from short-term borrowings	3,659,098	1,005,000		1,619,820
Payments on short-term borrowings	(3,338,000)	(1,556,090)		(1,368,255)
Proceeds from issuance of long-term debt, net of issuance costs	1,198,565	2,488,493		1,516,693
Repayment of long-term debt	(824,894)	(1,646,224)		(1,716,276)
Purchase of common shares for treasury	(859,593)	(269,400)		(816,871)
Dividends paid	(280,104)	(222,798)		(160,940)
Net cash provided by (used in) financing activities	(2,843,225)	994,294		(723,525)
Net increase (decrease) in cash, cash equivalents and restricted cash	(1,121,060)	2,163,332		1,184,537
Cash, cash equivalents and restricted cash at beginning of period	11,828,304	9,664,972		8,480,435
Cash, cash equivalents and restricted cash at end of period	10,707,244	11,828,304		9,664,972
Cash paid during the period for:
Interest	1,164,093	936,272		1,080,368
Income taxes, net	214,066	727,126		25
Parent company
Cash flows from operating activities:
Net earnings	785,449	1,674,352		775,239
Adjustments to reconcile net earnings to net cash provided by (used in) operating activities:
Deferred income taxes	(38,875)	27,933		(1,787)
Share-based compensation	43,919	78,160		40,038
Amortization	1,322	(24,379)		(36,708)
Undistributed earnings of subsidiaries	(905,915)	(1,714,959)		(877,871)
(Income) loss on investments in and loans to related parties	71,405	(101,302)		42,412
Other adjustments	(560,325)	(203,947)		187,486
Net change in assets and liabilities:
Financial instruments owned	200,903	(76,852)		78,592
Other assets	129,322	(171,933)		(4,069)
Financial instruments sold, not yet purchased	1,382	3,491		(2,307)
Income taxes receivable/payable, net	(158,732)	(62,531)		65,057
Accrued expenses and other liabilities	233,217	(126,894)		446,386
Net cash provided by operating activities	(196,928)	(698,861)		712,468
Cash flows from investing activities:
Contributions to investments in and loans to related parties	(118)	0		(50,000)
Capital distributions from investments and repayments of loans from related parties	22	50,000		0
Originations and purchases of automobile loans, notes and other receivables	0	(50,000)		(23,000)
Principal collections of loan receivables	0	0		23,000
Distribution (to) from subsidiaries, net	2,921,528	456,220		441,063
Proceeds from sales of subsidiaries	0	0		180,664
Other	0	(611)		0
Net cash used in investing activities	2,921,432	455,609		571,727
Cash flows from financing activities:
Proceeds from short-term borrowings	4,068	0		11,820
Payments on short-term borrowings	0	5,090		20,263
Proceeds from issuance of long-term debt, net of issuance costs	400,059	1,681,058		1,169,722
Repayment of long-term debt	(202,172)	(1,256,495)		(1,494,696)
Advances (to) from subsidiaries, net	30,428	(341,327)		1,159,495
Issuances of common shares	2,752	2,107		1,034
Purchase of common shares for treasury	(859,593)	(269,400)		(816,871)
Dividends paid	(280,104)	(222,798)		(160,940)
Net cash provided by (used in) financing activities	(904,562)	(411,945)		(150,699)
Net increase (decrease) in cash, cash equivalents and restricted cash	1,819,942	(655,197)		1,133,496
Cash, cash equivalents and restricted cash at beginning of period	649,204	1,304,401		170,905
Cash, cash equivalents and restricted cash at end of period	2,469,146	649,204		1,304,401
Cash paid during the period for:
Interest	484,349	381,117		324,782
Income taxes, net	124,516	625,072		1,811
Investments contributed to subsidiary	0	5,451		51,190
Dividends received from subsidiaries	$ 0	$ 1,970		$ 40,805

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