v3.25.2
Investment Securities - Narrative (Details)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2025
USD ($)
Investments
Jun. 30, 2024
USD ($)
Jun. 30, 2025
USD ($)
Investments
Jun. 30, 2024
USD ($)
Dec. 31, 2024
USD ($)
Investments
Schedule of Held-to-maturity Securities [Line Items]          
Debt Securities, Held-to-maturity, Allowance for Credit Loss $ 0.7   $ 0.7   $ 0.9
Interest Receivable 105.7   105.7   116.8
Securities Sold under Agreements to Repurchase, Fair Value of Collateral 3,315.7   3,315.7   3,460.2
Securities Loaned or Sold under Agreements to Repurchase, Fair Value Disclosure $ 3,049.9   $ 3,049.9   $ 3,092.6
Investment securities in an unrealized loss position (securities) | Investments 641   641   670
Investment Securities, Primarily Classified As Available-For-Sale, Callable, Within One Year, Amortized Cost Basis $ 1,064.8   $ 1,064.8    
Investment Securities, Primarily Classified As Available-For-Sale, Callable, Within One Year, Fair Value 1,031.2   1,031.2    
Accrued interest reversal (1.0) $ (0.2) (2.5) $ (2.0)  
Debt Securities          
Schedule of Held-to-maturity Securities [Line Items]          
Interest Receivable $ 26.5   $ 26.5   $ 29.6