Schedule I (PARENT COMPANY ONLY) - Condensed Statements of Cash Flows (Details) - USD ($) $ in Thousands	12 Months Ended
	Nov. 30, 2024	Nov. 30, 2023	Nov. 30, 2022
Cash flows from operating activities:
Net earnings	$ 716,019	$ 262,388	$ 781,710
Adjustments to reconcile net earnings to net cash provided by (used in) operating activities:
Deferred income taxes	(4,131)	10,462	(70,396)
Share-based compensation	63,119	45,360	43,919
(Income) loss on investments in and loans to related parties	(86,466)	192,197	36,287
Other adjustments	264,680	(99,784)	(601,303)
Net change in assets and liabilities:
Financial instruments owned	(2,416,306)	(2,843,554)	(773,523)
Other assets	(339,141)	(551,926)	(230,722)
Financial instruments sold, not yet purchased	(234,747)	(8,894)	1,875,957
Accrued expenses and other liabilities	925,006	(318,798)	(715,434)
Net cash (used in) provided by operating activities from continuing operations	(140,466)	(1,933,626)	1,804,847
Cash flows from investing activities:
Contributions to investments in and loans to related parties	(1,080,358)	(251,751)	(351,645)
Capital distributions from investments and repayments of loans from related parties	936,684	116,750	286,578
Cash flows from financing activities:
Proceeds from short-term borrowings	6,219,084	5,413,000	3,659,098
Payments on short-term borrowings	(6,743,153)	(5,010,868)	(3,338,000)
Proceeds from issuance of long-term debt, net of issuance costs	5,952,286	2,209,672	1,198,565
Repayment of long-term debt	(2,427,653)	(1,282,369)	(824,894)
Purchase of common shares for treasury	(44,312)	(169,402)	(859,593)
Dividends paid	(302,964)	(278,595)	(280,104)
Net increase (decrease) in cash, cash equivalents, and restricted cash	3,348,078	(830,795)	(1,121,060)
Cash, cash equivalents, and restricted cash at beginning of period	9,830,758	10,707,244	11,828,304
Cash and cash equivalents at end of period	13,165,612	9,830,758	10,707,244
Cash paid during the period for:
Interest	3,440,878	2,348,061	1,164,093
Income taxes, net	257,503	159,359	214,066
Parent company
Cash flows from operating activities:
Net earnings	743,383	277,688	785,449
Adjustments to reconcile net earnings to net cash provided by (used in) operating activities:
Deferred income taxes	16,777	53,728	(38,875)
Share-based compensation	63,119	45,360	43,919
Amortization	7,046	1,040	1,322
Undistributed earnings of subsidiaries	(666,013)	(235,425)	(905,915)
(Income) loss on investments in and loans to related parties	(36,403)	6,808	71,405
Other adjustments	149,077	(438,649)	(560,325)
Net change in assets and liabilities:
Financial instruments owned	(37,374)	17,303	200,903
Other assets	175,338	(67,626)	129,322
Financial instruments sold, not yet purchased	4,445	(4,183)	1,382
Income taxes receivable/payable, net	(179,259)	(189,608)	(158,732)
Accrued expenses and other liabilities	79,561	49,916	233,217
Net cash (used in) provided by operating activities from continuing operations	319,697	(483,648)	(196,928)
Cash flows from investing activities:
Contributions to investments in and loans to related parties	(950,123)	(211)	(118)
Capital distributions from investments and repayments of loans from related parties	934,594	0	22
Distribution (to) from subsidiaries, net	190,919	887,895	2,921,528
Net cash (used in) provided by operating activities from continuing operations	175,390	887,684	2,921,432
Net cash provided by investing activities from discontinued operations	29,294	0	0
Cash flows from financing activities:
Proceeds from short-term borrowings	0	0	4,068
Payments on short-term borrowings	0	(10,868)	0
Proceeds from issuance of long-term debt, net of issuance costs	5,336,634	1,718,992	400,059
Repayment of long-term debt	(1,936,085)	(813,182)	(202,172)
Advances (to) from subsidiaries, net	(4,180,659)	(828,114)	30,428
Issuances of common shares	0	0	2,752
Purchase of common shares for treasury	(44,313)	(169,402)	(859,593)
Proceeds from conversion of common to preferred shares	9,844	31,500	0
Dividends paid	(302,964)	(278,595)	(280,104)
Net cash used in financing activities from continuing operations	(1,117,543)	(349,669)	(904,562)
Net increase (decrease) in cash, cash equivalents, and restricted cash	(593,162)	54,367	1,819,942
Cash, cash equivalents, and restricted cash at beginning of period	2,523,513	2,469,146	649,204
Cash and cash equivalents at end of period	1,930,351	2,523,513	2,469,146
Cash paid during the period for:
Interest	632,040	176,981	484,349
Income taxes, net	$ 186,177	$ 95,634	$ 124,516