v3.25.1
Retained Earnings and Regulatory Capital Requirements - Capital Amounts and Ratios in Accordance With Current Banking Regulations (Details)
$ in Millions
Mar. 31, 2025
USD ($)
Dec. 31, 2024
USD ($)
HSBC USA    
Common equity Tier 1 ratio:    
Capital Amount $ 13,702 $ 13,508
Well-Capitalized Ratio 0.045 0.045
Actual Ratio 0.136 0.136
Tier 1 capital ratio:    
Capital Amount $ 13,967 $ 13,773
Well-Capitalized Ratio 0.060 0.060
Actual Ratio 0.138 0.138
Total capital ratio:    
Capital Amount $ 16,410 $ 16,111
Well-Capitalized Ratio 0.100 0.100
Actual Ratio 0.162 0.162
Tier 1 leverage ratio:    
Capital Amount $ 13,967 $ 13,773
Well-Capitalized Ratio 0.040 0.040
Actual Ratio 0.080 0.080
Risk weighted assets:    
Capital Amount $ 101,078 $ 99,462
Adjusted quarterly average assets    
Capital Amount 175,341 173,041
HSBC Bank USA    
Common equity Tier 1 ratio:    
Capital Amount $ 15,762 $ 15,504
Well-Capitalized Ratio 0.065 0.065
Actual Ratio 0.165 0.164
Tier 1 capital ratio:    
Capital Amount $ 17,262 $ 17,004
Well-Capitalized Ratio 0.080 0.080
Actual Ratio 0.180 0.180
Total capital ratio:    
Capital Amount $ 19,395 $ 19,035
Well-Capitalized Ratio 0.100 0.100
Actual Ratio 0.203 0.202
Tier 1 leverage ratio:    
Capital Amount $ 17,262 $ 17,004
Well-Capitalized Ratio 0.050 0.050
Actual Ratio 0.102 0.102
Risk weighted assets:    
Capital Amount $ 95,737 $ 94,334
Adjusted quarterly average assets    
Capital Amount $ 168,708 $ 167,348