v3.26.1
Loans, Leases and Allowance for Credit Losses - Collateral Dependent Loans (Details) - USD ($)
$ in Millions
Mar. 31, 2026
Dec. 31, 2025
Loans and Leases Receivable Disclosure [Line Items]    
Net loans HFI $ 58,681 $ 58,216
Asset Pledged as Collateral    
Loans and Leases Receivable Disclosure [Line Items]    
Net loans HFI 419 410
Real Estate Collateral | Asset Pledged as Collateral    
Loans and Leases Receivable Disclosure [Line Items]    
Net loans HFI 338 331
Other Collateral | Asset Pledged as Collateral    
Loans and Leases Receivable Disclosure [Line Items]    
Net loans HFI 81 79
Other commercial and industrial | Asset Pledged as Collateral    
Loans and Leases Receivable Disclosure [Line Items]    
Net loans HFI 81 79
Other commercial and industrial | Real Estate Collateral | Asset Pledged as Collateral    
Loans and Leases Receivable Disclosure [Line Items]    
Net loans HFI 0 0
Other commercial and industrial | Other Collateral | Asset Pledged as Collateral    
Loans and Leases Receivable Disclosure [Line Items]    
Net loans HFI 81 79
CRE - owner occupied | Asset Pledged as Collateral    
Loans and Leases Receivable Disclosure [Line Items]    
Net loans HFI 3 3
CRE - owner occupied | Real Estate Collateral | Asset Pledged as Collateral    
Loans and Leases Receivable Disclosure [Line Items]    
Net loans HFI 3 3
CRE - owner occupied | Other Collateral | Asset Pledged as Collateral    
Loans and Leases Receivable Disclosure [Line Items]    
Net loans HFI 0 0
Other CRE - non-owner occupied | Asset Pledged as Collateral    
Loans and Leases Receivable Disclosure [Line Items]    
Net loans HFI 250 219
Other CRE - non-owner occupied | Real Estate Collateral | Asset Pledged as Collateral    
Loans and Leases Receivable Disclosure [Line Items]    
Net loans HFI 250 219
Other CRE - non-owner occupied | Other Collateral | Asset Pledged as Collateral    
Loans and Leases Receivable Disclosure [Line Items]    
Net loans HFI 0 0
Construction and land development | Asset Pledged as Collateral    
Loans and Leases Receivable Disclosure [Line Items]    
Net loans HFI 85 109
Construction and land development | Real Estate Collateral | Asset Pledged as Collateral    
Loans and Leases Receivable Disclosure [Line Items]    
Net loans HFI 85 109
Construction and land development | Other Collateral | Asset Pledged as Collateral    
Loans and Leases Receivable Disclosure [Line Items]    
Net loans HFI $ 0 $ 0