v3.26.1
Collateralized Transactions - Contractual Maturity (Details) - USD ($)
$ in Millions
May 31, 2026
Nov. 30, 2025
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]    
Securities Lending Arrangements $ 3,104.6 $ 2,540.8
Repurchase Agreements 18,500.0 18,261.2
Obligation to Return Securities Received as Collateral, at Fair Value 310.8 200.5
Total 21,915.4 21,002.5
Overnight and Continuous    
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]    
Securities Lending Arrangements 2,687.9 2,072.7
Repurchase Agreements 2,007.7 2,108.1
Obligation to Return Securities Received as Collateral, at Fair Value 310.8 200.5
Total 5,006.4 4,381.3
Up to 30 Days    
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]    
Securities Lending Arrangements 236.3 123.8
Repurchase Agreements 8,299.2 9,569.4
Obligation to Return Securities Received as Collateral, at Fair Value 0.0 0.0
Total 8,535.5 9,693.2
31-90 Days    
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]    
Securities Lending Arrangements 101.2 81.3
Repurchase Agreements 4,116.7 2,959.8
Obligation to Return Securities Received as Collateral, at Fair Value 0.0 0.0
Total 4,217.9 3,041.1
Greater than 90 Days    
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]    
Securities Lending Arrangements 79.2 263.0
Repurchase Agreements 4,076.4 3,623.9
Obligation to Return Securities Received as Collateral, at Fair Value 0.0 0.0
Total $ 4,155.6 $ 3,886.9