v3.26.1
Commitments and Contingencies - Schedule of Loan Commitments and Letters of Credit (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Total letters of credit and unfunded lending commitments    
Loss Contingencies [Line Items]    
Total letters of credit and unfunded lending commitments $ 36,598 $ 18,601
Letters of credit    
Loss Contingencies [Line Items]    
Total letters of credit and unfunded lending commitments 1,018 601
Commitments to fund commercial and industrial loans    
Loss Contingencies [Line Items]    
Total letters of credit and unfunded lending commitments 21,098 9,309
Commitments to fund commercial real estate, construction, and land development loans    
Loss Contingencies [Line Items]    
Total letters of credit and unfunded lending commitments 7,697 5,329
Commitments under home equity lines of credit    
Loss Contingencies [Line Items]    
Total letters of credit and unfunded lending commitments 4,066 1,904
Unused credit card lines    
Loss Contingencies [Line Items]    
Total letters of credit and unfunded lending commitments 871 411
Other loan commitments    
Loss Contingencies [Line Items]    
Total letters of credit and unfunded lending commitments $ 1,848 $ 1,047