v3.26.1
Asset Quality - Schedule of Amortized Cost Basis of Modified Loans That Subsequently Defaulted (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Financial receivable, modifications, subsequent default, recorded investment $ 2 $ 4 $ 44 $ 22
Interest Rate Reduction        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Financial receivable, modifications, subsequent default, recorded investment 0 0 0 0
Term Extension        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Financial receivable, modifications, subsequent default, recorded investment 2 1 41 20
Other        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Financial receivable, modifications, subsequent default, recorded investment 0 2 2 2
Combination        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Financial receivable, modifications, subsequent default, recorded investment 0 1 1 0
Commercial and Industrial        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Financial receivable, modifications, subsequent default, recorded investment       3
Commercial and Industrial | Interest Rate Reduction        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Financial receivable, modifications, subsequent default, recorded investment       0
Commercial and Industrial | Term Extension        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Financial receivable, modifications, subsequent default, recorded investment       1
Commercial and Industrial | Other        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Financial receivable, modifications, subsequent default, recorded investment       2
Commercial and Industrial | Combination        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Financial receivable, modifications, subsequent default, recorded investment       0
Total commercial loans        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Financial receivable, modifications, subsequent default, recorded investment 2 3 43 22
Total commercial loans | Interest Rate Reduction        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Financial receivable, modifications, subsequent default, recorded investment 0 0 0 0
Total commercial loans | Term Extension        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Financial receivable, modifications, subsequent default, recorded investment 2 1 41 20
Total commercial loans | Other        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Financial receivable, modifications, subsequent default, recorded investment 0 2 2 2
Total commercial loans | Combination        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Financial receivable, modifications, subsequent default, recorded investment 0 0 0 0
Total commercial loans | Commercial and Industrial        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Financial receivable, modifications, subsequent default, recorded investment 2 3 2  
Total commercial loans | Commercial and Industrial | Interest Rate Reduction        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Financial receivable, modifications, subsequent default, recorded investment 0 0 0  
Total commercial loans | Commercial and Industrial | Term Extension        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Financial receivable, modifications, subsequent default, recorded investment 2 1 2  
Total commercial loans | Commercial and Industrial | Other        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Financial receivable, modifications, subsequent default, recorded investment 0 2 0  
Total commercial loans | Commercial and Industrial | Combination        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Financial receivable, modifications, subsequent default, recorded investment $ 0 0 0  
Total commercial loans | Commercial mortgage        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Financial receivable, modifications, subsequent default, recorded investment     41  
Total commercial loans | Commercial mortgage | Interest Rate Reduction        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Financial receivable, modifications, subsequent default, recorded investment     0  
Total commercial loans | Commercial mortgage | Term Extension        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Financial receivable, modifications, subsequent default, recorded investment     39  
Total commercial loans | Commercial mortgage | Other        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Financial receivable, modifications, subsequent default, recorded investment     2  
Total commercial loans | Commercial mortgage | Combination        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Financial receivable, modifications, subsequent default, recorded investment     0  
Total consumer loans        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Financial receivable, modifications, subsequent default, recorded investment   1 1  
Total consumer loans | Interest Rate Reduction        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Financial receivable, modifications, subsequent default, recorded investment   0 0  
Total consumer loans | Term Extension        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Financial receivable, modifications, subsequent default, recorded investment   0 0  
Total consumer loans | Other        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Financial receivable, modifications, subsequent default, recorded investment   0 0  
Total consumer loans | Combination        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Financial receivable, modifications, subsequent default, recorded investment   1 1  
Total consumer loans | Home equity loans        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Financial receivable, modifications, subsequent default, recorded investment     1  
Total consumer loans | Home equity loans | Interest Rate Reduction        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Financial receivable, modifications, subsequent default, recorded investment     0  
Total consumer loans | Home equity loans | Term Extension        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Financial receivable, modifications, subsequent default, recorded investment     0  
Total consumer loans | Home equity loans | Other        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Financial receivable, modifications, subsequent default, recorded investment     0  
Total consumer loans | Home equity loans | Combination        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Financial receivable, modifications, subsequent default, recorded investment     $ 1  
Total consumer loans | Credit cards        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Financial receivable, modifications, subsequent default, recorded investment   1    
Total consumer loans | Credit cards | Interest Rate Reduction        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Financial receivable, modifications, subsequent default, recorded investment   0    
Total consumer loans | Credit cards | Term Extension        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Financial receivable, modifications, subsequent default, recorded investment   0    
Total consumer loans | Credit cards | Other        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Financial receivable, modifications, subsequent default, recorded investment   0    
Total consumer loans | Credit cards | Combination        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Financial receivable, modifications, subsequent default, recorded investment   $ 1    
Total commercial real estate loans | Commercial mortgage        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Financial receivable, modifications, subsequent default, recorded investment       19
Total commercial real estate loans | Commercial mortgage | Interest Rate Reduction        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Financial receivable, modifications, subsequent default, recorded investment       0
Total commercial real estate loans | Commercial mortgage | Term Extension        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Financial receivable, modifications, subsequent default, recorded investment       19
Total commercial real estate loans | Commercial mortgage | Other        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Financial receivable, modifications, subsequent default, recorded investment       0
Total commercial real estate loans | Commercial mortgage | Combination        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Financial receivable, modifications, subsequent default, recorded investment       0
Total commercial real estate loans | Total commercial real estate loans        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Financial receivable, modifications, subsequent default, recorded investment       19
Total commercial real estate loans | Total commercial real estate loans | Interest Rate Reduction        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Financial receivable, modifications, subsequent default, recorded investment       0
Total commercial real estate loans | Total commercial real estate loans | Term Extension        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Financial receivable, modifications, subsequent default, recorded investment       19
Total commercial real estate loans | Total commercial real estate loans | Other        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Financial receivable, modifications, subsequent default, recorded investment       0
Total commercial real estate loans | Total commercial real estate loans | Combination        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Financial receivable, modifications, subsequent default, recorded investment       $ 0