Collateralized Transactions - Contractual Maturity (Details) - USD ($) $ in Thousands	Feb. 28, 2022	Nov. 30, 2021
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities lending arrangements	$ 1,808,896	$ 1,525,721
Repurchase agreements	19,301,825	16,019,400
Obligation to return securities received as collateral, at fair value	973	7,289
Total	21,111,694	17,552,410
Overnight and Continuous
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities lending arrangements	973,963	595,628
Repurchase agreements	10,491,946	6,551,934
Obligation to return securities received as collateral, at fair value	973	7,289
Total	11,466,882	7,154,851
Up to 30 Days
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities lending arrangements	0	1,318
Repurchase agreements	2,288,295	1,798,716
Obligation to return securities received as collateral, at fair value	0	0
Total	2,288,295	1,800,034
31 to 90 Days
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities lending arrangements	292,966	539,623
Repurchase agreements	2,686,587	4,361,993
Obligation to return securities received as collateral, at fair value	0	0
Total	2,979,553	4,901,616
Greater than 90 Days
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Securities lending arrangements	541,967	389,152
Repurchase agreements	3,834,997	3,306,757
Obligation to return securities received as collateral, at fair value	0	0
Total	$ 4,376,964	$ 3,695,909