v3.25.4
LOANS, LEASES, AND ALLOWANCE FOR CREDIT LOSSES (Narrative) (Details) - USD ($)
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Financing Receivable, Allowance for Credit Losses [Line Items]      
Net unamortized purchase premiums, discounts, and deferred loan fees and cost $ 61,000,000 $ 43,000,000  
Accrued interest receivable $ 276,000,000 $ 281,000,000  
Financing Receivable, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration] Other assets Other assets  
Loans and leases, net of unearned income and fees $ 60,917,000,000 $ 59,410,000,000  
Loans held for sale 201,000,000 74,000,000  
Principal balance of loans sold, serviced loans 679,000,000 615,000,000  
Income from loans sold 12,000,000 8,000,000 $ 16,000,000
Financing receivable, commitments threshold for evaluating collectively or individually 1,000,000    
Financing receivable commitments threshold for risk classification approach 1,000,000    
Nonaccruing loan threshold for evaluating individually 1,000,000    
Real estate acquired through foreclosure (prior year less than) 1,000,000 1,000,000  
Mortgage loans in process of foreclosure 20,000,000 14,000,000  
Asset Pledged as Collateral without Right      
Financing Receivable, Allowance for Credit Losses [Line Items]      
Loans held for sale 43,200,000,000 40,400,000,000  
Doubtful      
Financing Receivable, Allowance for Credit Losses [Line Items]      
Loans and leases, net of unearned income and fees 0 14,000,000  
Commercial real estate      
Financing Receivable, Allowance for Credit Losses [Line Items]      
Loans and leases, net of unearned income and fees $ 13,396,000,000 13,477,000,000  
Financing receivable, period once past due, charged off or charged down (in days) 180 days    
Consumer      
Financing Receivable, Allowance for Credit Losses [Line Items]      
Loans and leases, net of unearned income and fees $ 15,825,000,000 14,968,000,000  
Financing receivable, period once past due, charged off or charged down (in days) 180 days    
Payment deferral      
Financing Receivable, Allowance for Credit Losses [Line Items]      
Financing receivable, modifications, subsequent default, recorded investment (prior year less than) $ 6,000,000 1,000,000  
Principal forgiveness | Maximum      
Financing Receivable, Allowance for Credit Losses [Line Items]      
Loan modifications to borrowers experiencing financial difficulty, principal amount forgiven (prior year less than) 0 1,000,000  
Land Acquisition and Development | Commercial real estate      
Financing Receivable, Allowance for Credit Losses [Line Items]      
Loans and leases, net of unearned income and fees $ 257,000,000 $ 260,000,000  
Closed-End Consumer Loans | Consumer      
Financing Receivable, Allowance for Credit Losses [Line Items]      
Financing receivable, period once past due, charged off or charged down (in days) 120 days