v3.26.1
Loans - Summary of Past Due Status of Loans With Payment Modifications (Details) - Commercial loans - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Financing Receivable, Past Due [Line Items]    
Modified loans, past due $ 316 $ 353
Commercial mortgages    
Financing Receivable, Past Due [Line Items]    
Modified loans, past due 101 95
Business and corporate banking    
Financing Receivable, Past Due [Line Items]    
Modified loans, past due 215 258
30 - 89 Days    
Financing Receivable, Past Due [Line Items]    
Modified loans, past due 0 0
30 - 89 Days | Commercial mortgages    
Financing Receivable, Past Due [Line Items]    
Modified loans, past due 0 0
30 - 89 Days | Business and corporate banking    
Financing Receivable, Past Due [Line Items]    
Modified loans, past due 0 0
90+ Days    
Financing Receivable, Past Due [Line Items]    
Modified loans, past due 7 27
90+ Days | Commercial mortgages    
Financing Receivable, Past Due [Line Items]    
Modified loans, past due 0 18
90+ Days | Business and corporate banking    
Financing Receivable, Past Due [Line Items]    
Modified loans, past due 7 9
Current    
Financing Receivable, Past Due [Line Items]    
Modified loans, past due 309 326
Current | Commercial mortgages    
Financing Receivable, Past Due [Line Items]    
Modified loans, past due 101 77
Current | Business and corporate banking    
Financing Receivable, Past Due [Line Items]    
Modified loans, past due $ 208 $ 249