v3.26.1
LOANS, LEASES, AND ALLOWANCE FOR CREDIT LOSSES (Summary of Selected Information on Modified Loans) (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Financing Receivable, Modifications [Line Items]    
Amortized cost basis $ 225 $ 300
Percentage of total loans 0.40% 0.50%
Unfunded lending commitments on troubled debt restructuring $ 18 $ 8
Interest rate reduction    
Financing Receivable, Modifications [Line Items]    
Amortized cost basis 0 0
Maturity or term extension    
Financing Receivable, Modifications [Line Items]    
Amortized cost basis 220 282
Principal forgiveness    
Financing Receivable, Modifications [Line Items]    
Amortized cost basis 0 0
Payment deferral    
Financing Receivable, Modifications [Line Items]    
Amortized cost basis 0 8
Multiple modification types    
Financing Receivable, Modifications [Line Items]    
Amortized cost basis 5 10
Commercial:    
Financing Receivable, Modifications [Line Items]    
Amortized cost basis $ 84 $ 40
Percentage of total loans 0.30% 0.10%
Commercial: | Interest rate reduction    
Financing Receivable, Modifications [Line Items]    
Amortized cost basis $ 0 $ 0
Commercial: | Maturity or term extension    
Financing Receivable, Modifications [Line Items]    
Amortized cost basis 81 40
Commercial: | Principal forgiveness    
Financing Receivable, Modifications [Line Items]    
Amortized cost basis 0 0
Commercial: | Payment deferral    
Financing Receivable, Modifications [Line Items]    
Amortized cost basis 0 0
Commercial: | Multiple modification types    
Financing Receivable, Modifications [Line Items]    
Amortized cost basis 3 0
Commercial: | Commercial and industrial    
Financing Receivable, Modifications [Line Items]    
Amortized cost basis $ 65 $ 35
Percentage of total loans 0.40% 0.20%
Commercial: | Commercial and industrial | Interest rate reduction    
Financing Receivable, Modifications [Line Items]    
Amortized cost basis $ 0 $ 0
Commercial: | Commercial and industrial | Maturity or term extension    
Financing Receivable, Modifications [Line Items]    
Amortized cost basis 62 35
Commercial: | Commercial and industrial | Principal forgiveness    
Financing Receivable, Modifications [Line Items]    
Amortized cost basis 0 0
Commercial: | Commercial and industrial | Payment deferral    
Financing Receivable, Modifications [Line Items]    
Amortized cost basis 0 0
Commercial: | Commercial and industrial | Multiple modification types    
Financing Receivable, Modifications [Line Items]    
Amortized cost basis 3 0
Commercial: | Owner-occupied    
Financing Receivable, Modifications [Line Items]    
Amortized cost basis $ 19 $ 5
Percentage of total loans 0.20% 0.10%
Commercial: | Owner-occupied | Interest rate reduction    
Financing Receivable, Modifications [Line Items]    
Amortized cost basis $ 0 $ 0
Commercial: | Owner-occupied | Maturity or term extension    
Financing Receivable, Modifications [Line Items]    
Amortized cost basis 19 5
Commercial: | Owner-occupied | Principal forgiveness    
Financing Receivable, Modifications [Line Items]    
Amortized cost basis 0 0
Commercial: | Owner-occupied | Payment deferral    
Financing Receivable, Modifications [Line Items]    
Amortized cost basis 0 0
Commercial: | Owner-occupied | Multiple modification types    
Financing Receivable, Modifications [Line Items]    
Amortized cost basis 0 0
Commercial real estate:    
Financing Receivable, Modifications [Line Items]    
Amortized cost basis   $ 250
Percentage of total loans   1.80%
Commercial real estate: | Interest rate reduction    
Financing Receivable, Modifications [Line Items]    
Amortized cost basis   $ 0
Commercial real estate: | Maturity or term extension    
Financing Receivable, Modifications [Line Items]    
Amortized cost basis   242
Commercial real estate: | Principal forgiveness    
Financing Receivable, Modifications [Line Items]    
Amortized cost basis   0
Commercial real estate: | Payment deferral    
Financing Receivable, Modifications [Line Items]    
Amortized cost basis   8
Commercial real estate: | Multiple modification types    
Financing Receivable, Modifications [Line Items]    
Amortized cost basis   0
Commercial real estate: | Term    
Financing Receivable, Modifications [Line Items]    
Amortized cost basis $ 139 $ 219
Percentage of total loans 1.20% 2.00%
Commercial real estate: | Term | Interest rate reduction    
Financing Receivable, Modifications [Line Items]    
Amortized cost basis $ 0 $ 0
Commercial real estate: | Term | Maturity or term extension    
Financing Receivable, Modifications [Line Items]    
Amortized cost basis 139 211
Commercial real estate: | Term | Principal forgiveness    
Financing Receivable, Modifications [Line Items]    
Amortized cost basis 0 0
Commercial real estate: | Term | Payment deferral    
Financing Receivable, Modifications [Line Items]    
Amortized cost basis 0 8
Commercial real estate: | Term | Multiple modification types    
Financing Receivable, Modifications [Line Items]    
Amortized cost basis 0 0
Commercial real estate: | Construction and land development    
Financing Receivable, Modifications [Line Items]    
Amortized cost basis   $ 31
Percentage of total loans   1.10%
Commercial real estate: | Construction and land development | Interest rate reduction    
Financing Receivable, Modifications [Line Items]    
Amortized cost basis   $ 0
Commercial real estate: | Construction and land development | Maturity or term extension    
Financing Receivable, Modifications [Line Items]    
Amortized cost basis   31
Commercial real estate: | Construction and land development | Principal forgiveness    
Financing Receivable, Modifications [Line Items]    
Amortized cost basis   0
Commercial real estate: | Construction and land development | Payment deferral    
Financing Receivable, Modifications [Line Items]    
Amortized cost basis   0
Commercial real estate: | Construction and land development | Multiple modification types    
Financing Receivable, Modifications [Line Items]    
Amortized cost basis   0
Consumer:    
Financing Receivable, Modifications [Line Items]    
Amortized cost basis   $ 10
Percentage of total loans   0.10%
Consumer: | Interest rate reduction    
Financing Receivable, Modifications [Line Items]    
Amortized cost basis   $ 0
Consumer: | Maturity or term extension    
Financing Receivable, Modifications [Line Items]    
Amortized cost basis   0
Consumer: | Principal forgiveness    
Financing Receivable, Modifications [Line Items]    
Amortized cost basis   0
Consumer: | Payment deferral    
Financing Receivable, Modifications [Line Items]    
Amortized cost basis   0
Consumer: | Multiple modification types    
Financing Receivable, Modifications [Line Items]    
Amortized cost basis   10
Consumer: | 1-4 family residential    
Financing Receivable, Modifications [Line Items]    
Amortized cost basis $ 2 $ 10
Percentage of total loans 0.00% 0.10%
Consumer: | 1-4 family residential | Interest rate reduction    
Financing Receivable, Modifications [Line Items]    
Amortized cost basis $ 0 $ 0
Consumer: | 1-4 family residential | Maturity or term extension    
Financing Receivable, Modifications [Line Items]    
Amortized cost basis 0 0
Consumer: | 1-4 family residential | Principal forgiveness    
Financing Receivable, Modifications [Line Items]    
Amortized cost basis 0 0
Consumer: | 1-4 family residential | Payment deferral    
Financing Receivable, Modifications [Line Items]    
Amortized cost basis 0 0
Consumer: | 1-4 family residential | Multiple modification types    
Financing Receivable, Modifications [Line Items]    
Amortized cost basis $ 2 $ 10