Collateralized Transactions - Contractual Maturity (Details) - USD ($) $ in Thousands	Feb. 29, 2024	Nov. 30, 2023
Transfer Of Certain Financial Assets Accounted For As Secured Borrowings [Line Items]
Securities lending arrangements	$ 2,709,170	$ 1,840,518
Repurchase agreements	17,212,651	19,841,194
Obligation to return securities received as collateral, at fair value	110,897	8,800
Total	20,032,718	21,690,512
Overnight and Continuous
Transfer Of Certain Financial Assets Accounted For As Secured Borrowings [Line Items]
Securities lending arrangements	1,759,779	1,068,665
Repurchase agreements	7,615,647	10,548,263
Obligation to return securities received as collateral, at fair value	110,897	8,800
Total	9,486,323	11,625,728
Up to 30 Days
Transfer Of Certain Financial Assets Accounted For As Secured Borrowings [Line Items]
Securities lending arrangements	24,000	0
Repurchase agreements	2,897,392	2,442,446
Obligation to return securities received as collateral, at fair value	0	0
Total	2,921,392	2,442,446
31-90 Days
Transfer Of Certain Financial Assets Accounted For As Secured Borrowings [Line Items]
Securities lending arrangements	399,915	244,158
Repurchase agreements	2,755,338	1,939,891
Obligation to return securities received as collateral, at fair value	0	0
Total	3,155,253	2,184,049
Greater than 90 Days
Transfer Of Certain Financial Assets Accounted For As Secured Borrowings [Line Items]
Securities lending arrangements	525,476	527,695
Repurchase agreements	3,944,274	4,910,594
Obligation to return securities received as collateral, at fair value	0	0
Total	$ 4,469,750	$ 5,438,289