v3.25.1
Fee Income from Contracts with Customers - Disaggregation (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Disaggregation of Revenue [Line Items]    
Other non-fee revenue $ 193 $ 223
Total other revenues 516 539
Total Fee Income    
Disaggregation of Revenue [Line Items]    
Total fee income from contracts with customers 323 316
Credit card fees, net    
Disaggregation of Revenue [Line Items]    
Total fee income from contracts with customers 14 15
Trust and investment management fees    
Disaggregation of Revenue [Line Items]    
Total fee income from contracts with customers 41 36
Account services    
Disaggregation of Revenue [Line Items]    
Total fee income from contracts with customers 79 75
Credit facilities    
Disaggregation of Revenue [Line Items]    
Total fee income from contracts with customers 77 91
Other fees    
Disaggregation of Revenue [Line Items]    
Total fee income from contracts with customers 9 10
Other fees and commissions    
Disaggregation of Revenue [Line Items]    
Total fee income from contracts with customers 165 176
Servicing and other fees from HSBC affiliates    
Disaggregation of Revenue [Line Items]    
Total fee income from contracts with customers 102 88
Insurance    
Disaggregation of Revenue [Line Items]    
Total fee income from contracts with customers $ 1 $ 1