v3.26.1
Asset Quality - Schedule of Amortized Cost Basis of Modified Loans That Subsequently Defaulted (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Financial receivable, modifications, subsequent default, recorded investment $ 42 $ 20
Interest Rate Reduction    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Financial receivable, modifications, subsequent default, recorded investment 0 0
Term Extension    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Financial receivable, modifications, subsequent default, recorded investment 39 19
Other    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Financial receivable, modifications, subsequent default, recorded investment 2 0
Combination    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Financial receivable, modifications, subsequent default, recorded investment 1 1
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 | Interest Rate Reduction    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Financial receivable, modifications, subsequent default, recorded investment   0
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 | Other    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Financial receivable, modifications, subsequent default, recorded investment   0
Total commercial real estate loans | Combination    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Financial receivable, modifications, subsequent default, recorded investment   0
Total commercial real estate loans | Commercial mortgage    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Financial receivable, modifications, subsequent default, recorded investment 41 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 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 39 19
Total commercial real estate loans | Commercial mortgage | Other    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Financial receivable, modifications, subsequent default, recorded investment 2 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 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 41  
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 39  
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 2  
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  
Total commercial loans    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Financial receivable, modifications, subsequent default, recorded investment 41 19
Total commercial loans | Interest Rate Reduction    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Financial receivable, modifications, subsequent default, recorded investment 0 0
Total commercial loans | Term Extension    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Financial receivable, modifications, subsequent default, recorded investment 39 19
Total commercial loans | Other    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Financial receivable, modifications, subsequent default, recorded investment 2 0
Total commercial loans | Combination    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Financial receivable, modifications, subsequent default, recorded investment 0 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