v3.25.4
Report of Directors Financial Review Risk Report - Scenario weighting (Details)
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Upside scenario    
Disclosure of sensitivity analysis for actuarial assumptions [line items]    
Probability 10.00% 10.00%
Upside scenario | UK    
Disclosure of sensitivity analysis for actuarial assumptions [line items]    
Probability 10.00% 10.00%
Upside scenario | US    
Disclosure of sensitivity analysis for actuarial assumptions [line items]    
Probability 10.00% 10.00%
Upside scenario | Hong Kong    
Disclosure of sensitivity analysis for actuarial assumptions [line items]    
Probability 10.00% 10.00%
Upside scenario | Mainland China    
Disclosure of sensitivity analysis for actuarial assumptions [line items]    
Probability 10.00% 10.00%
Upside scenario | France    
Disclosure of sensitivity analysis for actuarial assumptions [line items]    
Probability 10.00% 10.00%
Upside scenario | UAE    
Disclosure of sensitivity analysis for actuarial assumptions [line items]    
Probability 10.00% 10.00%
Upside scenario | Mexico    
Disclosure of sensitivity analysis for actuarial assumptions [line items]    
Probability 10.00% 10.00%
Central scenario    
Disclosure of sensitivity analysis for actuarial assumptions [line items]    
Probability 75.00% 75.00%
Central scenario | UK    
Disclosure of sensitivity analysis for actuarial assumptions [line items]    
Probability 75.00% 75.00%
Central scenario | US    
Disclosure of sensitivity analysis for actuarial assumptions [line items]    
Probability 75.00% 75.00%
Central scenario | Hong Kong    
Disclosure of sensitivity analysis for actuarial assumptions [line items]    
Probability 75.00% 75.00%
Central scenario | Mainland China    
Disclosure of sensitivity analysis for actuarial assumptions [line items]    
Probability 75.00% 75.00%
Central scenario | France    
Disclosure of sensitivity analysis for actuarial assumptions [line items]    
Probability 75.00% 75.00%
Central scenario | UAE    
Disclosure of sensitivity analysis for actuarial assumptions [line items]    
Probability 75.00% 75.00%
Central scenario | Mexico    
Disclosure of sensitivity analysis for actuarial assumptions [line items]    
Probability 75.00% 75.00%
Downside scenario    
Disclosure of sensitivity analysis for actuarial assumptions [line items]    
Probability 10.00% 10.00%
Downside scenario | UK    
Disclosure of sensitivity analysis for actuarial assumptions [line items]    
Probability 10.00% 10.00%
Downside scenario | US    
Disclosure of sensitivity analysis for actuarial assumptions [line items]    
Probability 10.00% 10.00%
Downside scenario | Hong Kong    
Disclosure of sensitivity analysis for actuarial assumptions [line items]    
Probability 10.00% 10.00%
Downside scenario | Mainland China    
Disclosure of sensitivity analysis for actuarial assumptions [line items]    
Probability 10.00% 10.00%
Downside scenario | France    
Disclosure of sensitivity analysis for actuarial assumptions [line items]    
Probability 10.00% 10.00%
Downside scenario | UAE    
Disclosure of sensitivity analysis for actuarial assumptions [line items]    
Probability 10.00% 10.00%
Downside scenario | Mexico    
Disclosure of sensitivity analysis for actuarial assumptions [line items]    
Probability 10.00% 10.00%
Downside 2 scenario    
Disclosure of sensitivity analysis for actuarial assumptions [line items]    
Probability 5.00% 5.00%
Downside 2 scenario | UK    
Disclosure of sensitivity analysis for actuarial assumptions [line items]    
Probability 5.00% 5.00%
Downside 2 scenario | US    
Disclosure of sensitivity analysis for actuarial assumptions [line items]    
Probability 5.00% 5.00%
Downside 2 scenario | Hong Kong    
Disclosure of sensitivity analysis for actuarial assumptions [line items]    
Probability 5.00% 5.00%
Downside 2 scenario | Mainland China    
Disclosure of sensitivity analysis for actuarial assumptions [line items]    
Probability 5.00% 5.00%
Downside 2 scenario | France    
Disclosure of sensitivity analysis for actuarial assumptions [line items]    
Probability 5.00% 5.00%
Downside 2 scenario | UAE    
Disclosure of sensitivity analysis for actuarial assumptions [line items]    
Probability 5.00% 5.00%
Downside 2 scenario | Mexico    
Disclosure of sensitivity analysis for actuarial assumptions [line items]    
Probability 5.00% 5.00%