v3.26.1
LOANS, LEASES, AND ALLOWANCE FOR CREDIT LOSSES (Collateral-Dependent Loans) (Details) - USD ($)
$ in Millions
Mar. 31, 2026
Dec. 31, 2025
Financing Receivable, Allowance for Credit Losses [Line Items]    
Amortized cost $ 64 $ 70
Commercial and industrial | Commercial: | Semi-trailers and semi-tractors    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Amortized cost $ 2  
Weighted average LTV 82.00%  
Commercial and industrial | Commercial: | Single family residential    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Amortized cost   $ 3
Weighted average LTV   71.00%
Owner-occupied | Commercial: | Agriculture production and industrial buildings    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Amortized cost $ 16 $ 23
Weighted average LTV 68.00% 67.00%
Municipal | Commercial: | Multifamily apartments    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Amortized cost $ 2 $ 2
Weighted average LTV 81.00% 93.00%
Term | Commercial real estate: | Office building    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Amortized cost $ 41 $ 37
Weighted average LTV 57.00% 98.00%
1-4 family residential | Consumer: | Single family residential    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Amortized cost $ 3 $ 5
Weighted average LTV 53.00% 62.00%