v3.25.2
Derivatives and Hedging Activities - Derivative Instruments, Gain (Loss) (Details) - Interest income on loans, including fees - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Loans HFI        
Derivative Instruments, Gain (Loss) [Line Items]        
Gain/(Loss) on Swaps $ (31.6) $ 11.2 $ (95.4) $ 83.2
Gain/(Loss) on Hedged Item 31.6 (11.4) 95.5 (83.8)
Investment securities - AFS        
Derivative Instruments, Gain (Loss) [Line Items]        
Gain/(Loss) on Swaps (38.4) 0.0 (38.4) 0.0
Gain/(Loss) on Hedged Item $ 40.2 $ 0.0 $ 40.2 $ 0.0