v3.26.1
LOAN SERVICING - Schedule of Activity in MSR (Details) - Mortgage Servicing Rights - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Servicing Assets at Fair Value [Line Items]          
Mortgage loans sold with servicing retained $ 7,423.0   $ 7,423.0   $ 7,062.0
Mortgage loans sold with servicing retained 509.0 $ 323.0 1,066.0 $ 635.0  
Pre-tax net gains (losses) resulting from above loan sales 7.0 5.0 14.0 9.0  
Mortgage servicing fees 4.0 4.0 9.0 8.0  
Servicing Asset at Amortized Cost, Balance [Roll Forward]          
Balance at beginning of period 73.9 72.6 73.5 70.5  
Additions 6.5 2.5 11.0 6.0  
Payoffs and curtailments (1.9) (1.3) (3.7) (2.1)  
Impairment (charge) / recovery 0.0 0.1 0.1 0.0  
Amortization / other (3.2) (1.7) (5.6) (2.2)  
Balance at end of period 75.3 72.2 75.3 72.2  
Fair value, beginning of period 91.8 84.8 88.2 86.3  
Fair value, end of period $ 94.9 $ 85.5 $ 94.9 $ 85.5