v3.26.1
Commitments and Contingencies - Schedule of Loan Commitments and Letters of Credit (Details) - USD ($)
$ in Millions
Mar. 31, 2026
Dec. 31, 2025
Total letters of credit and unfunded lending commitments    
Loss Contingencies [Line Items]    
Total letters of credit and unfunded lending commitments $ 36,448 $ 18,601
Letters of credit    
Loss Contingencies [Line Items]    
Total letters of credit and unfunded lending commitments 1,145 601
Commitments to fund commercial and industrial loans    
Loss Contingencies [Line Items]    
Total letters of credit and unfunded lending commitments 20,853 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 7,820 5,329
Commitments under home equity lines of credit    
Loss Contingencies [Line Items]    
Total letters of credit and unfunded lending commitments 4,034 1,904
Unused credit card lines    
Loss Contingencies [Line Items]    
Total letters of credit and unfunded lending commitments 842 411
Other loan commitments    
Loss Contingencies [Line Items]    
Total letters of credit and unfunded lending commitments $ 1,754 $ 1,047