Collateralized Transactions - Summary of Repurchase Agreements and Securities Borrowing and Lending Arrangements (Details) - USD ($) $ in Thousands	Nov. 30, 2024	Nov. 30, 2023
Securities borrowing arrangements
Gross Amounts	$ 7,213,400	$ 7,192,100
Netting in Consolidated Statements of Financial Condition	0	0
Net Amounts in Consolidated Statements of Financial Condition	7,213,421	7,192,091
Additional amounts available for setoff	(325,400)	(327,700)
Available collateral	(1,537,300)	(1,642,900)
Net amount	5,350,700	5,221,400
Reverse repurchase agreements
Gross Amounts	11,930,700	14,871,100
Netting in Consolidated Statements of Financial Condition	(5,751,000)	(8,920,600)
Net Amounts in Consolidated Statements of Financial Condition	6,179,653	5,950,549
Additional amounts available for setoff	(1,475,900)	(1,304,000)
Available collateral	(4,574,000)	(4,582,600)
Net amount	129,800	63,900
Securities lending arrangements
Gross Amounts	2,540,900	1,840,500
Netting in Consolidated Statements of Financial Condition	0	0
Net Amounts in Consolidated Statements of Financial Condition	2,540,861	1,840,518
Additional amounts available for setoff	(325,400)	(327,700)
Available collateral	(2,091,400)	(1,396,100)
Net amount	124,100	116,700
Repurchase agreements
Gross Amounts	18,088,900	19,841,200
Netting in Consolidated Statements of Financial Condition	(5,751,000)	(8,920,600)
Net Amounts in Consolidated Statements of Financial Condition	12,337,935	10,920,606
Additional amounts available for setoff	(1,475,900)	(1,304,000)
Available collateral	(10,274,600)	(9,035,400)
Net amount	587,400	581,200
Securities borrowing arrangements	5,310,000	5,170,000
Securities borrowing arrangements, collateral	5,190,000	5,040,000
Repurchase agreements	645,000	505,000
Repurchase agreements, pledged securities collateral	656,900	520,400
Obligation to return securities received as collateral, at fair value
Securities lending arrangements
Gross Amounts	185,600	8,800
Netting in Consolidated Statements of Financial Condition	0	0
Net Amounts in Consolidated Statements of Financial Condition	185,600	8,800
Additional amounts available for setoff	0	0
Available collateral	(185,600)	(8,800)
Net amount	0	0
Securities received as collateral, at fair value
Securities borrowing arrangements
Gross Amounts	185,600	8,800
Netting in Consolidated Statements of Financial Condition	0	0
Net Amounts in Consolidated Statements of Financial Condition	185,600	8,800
Additional amounts available for setoff	0	0
Available collateral	(185,600)	(8,800)
Net amount	$ 0	$ 0