v3.25.4
Report of Directors Financial Review Risk Report - Sensitivity of HSBC’s insurance manufacturing subsidiaries to insurance underwriting risk factors (Details) - Insurance Risk - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Mortality and/or morbidity rates    
Disclosure of types of insurance contracts [line items]    
Percentage of reasonably possible increase in risk variable that arises from contracts within scope of IFRS 17 5.00% 5.00%
Percentage of reasonably possible decrease in risk variable that arises from contracts within scope of IFRS 17 5.00% 5.00%
Effect on CSM due to increase in risk variable $ (310) $ (282)
Effect on CSM due to decrease in risk variable 322 297
Effect on profit after tax (net) due to increase in risk variable (6) (21)
Effect on profit after tax (net) due to decrease in risk variable 3 23
Effect on total equity (net) due to increase in risk variable (6) (30)
Effect on total equity (net) due to decrease in risk variable $ 3 $ 36
Lapse rates    
Disclosure of types of insurance contracts [line items]    
Percentage of reasonably possible increase in risk variable that arises from contracts within scope of IFRS 17 10.00% 10.00%
Percentage of reasonably possible decrease in risk variable that arises from contracts within scope of IFRS 17 10.00% 10.00%
Effect on CSM due to increase in risk variable $ (85) $ (92)
Effect on CSM due to decrease in risk variable 87 102
Effect on profit after tax (net) due to increase in risk variable (15) (16)
Effect on profit after tax (net) due to decrease in risk variable 12 14
Effect on total equity (net) due to increase in risk variable (17) (20)
Effect on total equity (net) due to decrease in risk variable $ 14 $ 23
Expense rates    
Disclosure of types of insurance contracts [line items]    
Percentage of reasonably possible increase in risk variable that arises from contracts within scope of IFRS 17 10.00% 10.00%
Percentage of reasonably possible decrease in risk variable that arises from contracts within scope of IFRS 17 10.00% 10.00%
Effect on CSM due to increase in risk variable $ (48) $ (66)
Effect on CSM due to decrease in risk variable 49 68
Effect on profit after tax (net) due to increase in risk variable (14) (11)
Effect on profit after tax (net) due to decrease in risk variable 12 12
Effect on total equity (net) due to increase in risk variable (14) (15)
Effect on total equity (net) due to decrease in risk variable $ 12 $ 15