v3.25.4
Insurance business - Discount rates (Details)
Dec. 31, 2025
Dec. 31, 2024
HK$ | HSBC Life (International) Ltd | 10-year discount rate (%)    
Disclosure of yield curve used to discount cash flows that do not vary based on returns on underlying items [line items]    
Yield used to discount cash flows that do not vary based on returns on underlying items 3.74% 4.32%
HK$ | HSBC Life (International) Ltd | 20-year discount rate (%)    
Disclosure of yield curve used to discount cash flows that do not vary based on returns on underlying items [line items]    
Yield used to discount cash flows that do not vary based on returns on underlying items 4.09% 4.42%
HK$ | Hang Seng Insurance Co Ltd | 10-year discount rate (%)    
Disclosure of yield curve used to discount cash flows that do not vary based on returns on underlying items [line items]    
Yield used to discount cash flows that do not vary based on returns on underlying items 3.85% 4.43%
HK$ | Hang Seng Insurance Co Ltd | 20-year discount rate (%)    
Disclosure of yield curve used to discount cash flows that do not vary based on returns on underlying items [line items]    
Yield used to discount cash flows that do not vary based on returns on underlying items 4.20% 4.53%
$ | HSBC Life (International) Ltd | 10-year discount rate (%)    
Disclosure of yield curve used to discount cash flows that do not vary based on returns on underlying items [line items]    
Yield used to discount cash flows that do not vary based on returns on underlying items 4.78% 5.16%
$ | HSBC Life (International) Ltd | 20-year discount rate (%)    
Disclosure of yield curve used to discount cash flows that do not vary based on returns on underlying items [line items]    
Yield used to discount cash flows that do not vary based on returns on underlying items 5.54% 5.51%
$ | Hang Seng Insurance Co Ltd | 10-year discount rate (%)    
Disclosure of yield curve used to discount cash flows that do not vary based on returns on underlying items [line items]    
Yield used to discount cash flows that do not vary based on returns on underlying items 4.82% 5.25%
$ | Hang Seng Insurance Co Ltd | 20-year discount rate (%)    
Disclosure of yield curve used to discount cash flows that do not vary based on returns on underlying items [line items]    
Yield used to discount cash flows that do not vary based on returns on underlying items 5.59% 5.60%