v3.26.1
ALLOWANCE FOR CREDIT LOSSES ON LOANS AND LEASES - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Mar. 31, 2026
Dec. 31, 2025
Mar. 31, 2025
Dec. 31, 2024
Financing Receivable, Allowance for Credit Loss [Line Items]                
Percentage of increase, housing price index 4.10%   4.10%     4.30%    
Percentage of increase, commercial real estate price index 0.90%   0.90%     (0.50%)    
Percentage of increase (decline), S&P volatility in next fiscal year 19.10%   19.10%     (2.20%)    
Percentage of increase (decline), S&P volatility in next second year (7.40%)   (7.40%)     (7.90%)    
ACL on loans and leases $ 447.0   $ 447.0     $ 439.0    
Financing receivable, allowance for credit loss, period increase (decrease) 21.4              
Provision for credit losses 22.0 $ 26.0 39.8 $ 43.1        
Allowance for credit losses on loans and leases                
Financing Receivable, Allowance for Credit Loss [Line Items]                
ACL on loans and leases $ 447.3 432.1 447.3 432.1 $ 443.0 $ 439.5 $ 428.9 $ 422.8
Financing receivable, allowance for credit loss, period increase (decrease)     $ 7.8          
Financing receivable, allowance for credit loss, period increase, percentage     1.80%          
Financing receivable, allowance for credit loss, ratio 1.25%   1.25%     1.26%    
Provision for credit losses $ 21.3 25.0 $ 40.7 43.6        
Charge-offs $ 17.0 $ 21.8 $ 32.9 $ 34.3        
Financing receivable, allowance for credit loss, net charge-offs (recovery), percentage 0.19% 0.25% 0.19% 0.20%        
Allowance for credit losses on loans and leases and allowance for unfunded loan commitments                
Financing Receivable, Allowance for Credit Loss [Line Items]                
ACL on loans and leases $ 466.4 $ 453.1 $ 466.4 $ 453.1 $ 462.2 $ 459.6 $ 449.2 $ 444.2
Provision for credit losses 21.2 25.7 39.7 43.2        
Charge-offs $ 17.0 $ 21.8 $ 32.9 $ 34.3