v3.25.2
LOANS, LEASES, AND ALLOWANCE FOR CREDIT LOSSES (Narrative) (Details) - USD ($)
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Dec. 31, 2024
Financing Receivable, Allowance for Credit Losses [Line Items]          
Net unamortized purchase premiums, discounts, and deferred loan fees and cost $ 52,000,000   $ 52,000,000   $ 43,000,000
Accrued interest receivable $ 279,000,000   $ 279,000,000   $ 281,000,000
Financing Receivable, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration] Other assets   Other assets   Other assets
Total loans $ 60,833,000,000   $ 60,833,000,000   $ 59,410,000,000
Loans held for sale 172,000,000   172,000,000   74,000,000
Principal balance of loans sold, serviced loans 693,000,000   693,000,000   615,000,000
Total income from loans sold 2,000,000 $ 2,000,000 5,000,000 $ 3,000,000  
Interest income 0 0 0 0  
Financing receivable, commitments threshold for risk classification approach 1,000,000   1,000,000    
Real estate acquired through foreclosure (prior year less than) 1,000,000   1,000,000   1,000,000
Mortgage loans in process of foreclosure 18,000,000   18,000,000   14,000,000
Nonaccrual          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Financing receivable, commitments threshold for evaluating individually 1,000,000   1,000,000    
Doubtful          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Total loans         14,000,000
Doubtful | Maximum          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Total loans 1,000,000   1,000,000    
Payment deferral          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Modified, still in default (prior year approximately) 0 $ 3,000,000 2,000,000 27,000,000  
Principal forgiveness          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Modified, principal forgiveness (year to date less than)     1,000,000 $ 1,000,000  
Asset Pledged as Collateral without Right          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Loans held for sale 41,600,000,000   41,600,000,000   40,400,000,000
Commercial:          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Total loans 31,646,000,000   31,646,000,000   30,965,000,000
Commercial real estate:          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Total loans 13,611,000,000   13,611,000,000   13,477,000,000
Consumer:          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Total loans 15,576,000,000   15,576,000,000   14,968,000,000
Land Acquisition and Development | Commercial real estate:          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Total loans 261,000,000   261,000,000   260,000,000
Commercial and industrial | Commercial:          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Total loans 17,526,000,000   17,526,000,000   16,891,000,000
Commercial and industrial | Commercial: | Nonaccrual          
Financing Receivable, Allowance for Credit Losses [Line Items]          
Total loans $ 113,000,000   $ 113,000,000   $ 114,000,000