v3.25.4
Insurance business - Effect of contracts initially recognised in the year (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Life direct participating and investment DPF contracts    
Disclosure of actual claims compared with previous estimates [line items]    
Profitable contracts issued $ 0 $ 0
Onerous contracts issued (8) (16)
Total (8) (16)
Life direct participating and investment DPF contracts | Estimates of present value of cash outflows    
Disclosure of actual claims compared with previous estimates [line items]    
Profitable contracts issued 19,675 16,878
Onerous contracts issued 295 495
Total 19,970 17,373
Life direct participating and investment DPF contracts | – insurance acquisition cash flows    
Disclosure of actual claims compared with previous estimates [line items]    
Profitable contracts issued 984 805
Onerous contracts issued 29 38
Total 1,013 843
Life direct participating and investment DPF contracts | – claims and other insurance service expenses payable    
Disclosure of actual claims compared with previous estimates [line items]    
Profitable contracts issued 18,691 16,073
Onerous contracts issued 266 457
Total 18,957 16,530
Life direct participating and investment DPF contracts | Estimates of present value of cash inflows    
Disclosure of actual claims compared with previous estimates [line items]    
Profitable contracts issued (23,290) (19,326)
Onerous contracts issued (288) (481)
Total (23,578) (19,807)
Life direct participating and investment DPF contracts | Risk adjustment for non-financial risk    
Disclosure of actual claims compared with previous estimates [line items]    
Profitable contracts issued 51 48
Onerous contracts issued 1 2
Total 52 50
Life direct participating and investment DPF contracts | Contractual service margin    
Disclosure of actual claims compared with previous estimates [line items]    
Profitable contracts issued 3,564 2,400
Onerous contracts issued 0 0
Total 3,564 2,400
Life other contracts    
Disclosure of actual claims compared with previous estimates [line items]    
Profitable contracts issued 0 0
Onerous contracts issued (6) (19)
Total (6) (19)
Life other contracts | Estimates of present value of cash outflows    
Disclosure of actual claims compared with previous estimates [line items]    
Profitable contracts issued 1,465 1,484
Onerous contracts issued 183 476
Total 1,648 1,960
Life other contracts | – insurance acquisition cash flows    
Disclosure of actual claims compared with previous estimates [line items]    
Profitable contracts issued 48 125
Onerous contracts issued 19 65
Total 67 190
Life other contracts | – claims and other insurance service expenses payable    
Disclosure of actual claims compared with previous estimates [line items]    
Profitable contracts issued 1,417 1,359
Onerous contracts issued 164 411
Total 1,581 1,770
Life other contracts | Estimates of present value of cash inflows    
Disclosure of actual claims compared with previous estimates [line items]    
Profitable contracts issued (1,669) (1,731)
Onerous contracts issued (180) (460)
Total (1,849) (2,191)
Life other contracts | Risk adjustment for non-financial risk    
Disclosure of actual claims compared with previous estimates [line items]    
Profitable contracts issued 15 27
Onerous contracts issued 3 3
Total 18 30
Life other contracts | Contractual service margin    
Disclosure of actual claims compared with previous estimates [line items]    
Profitable contracts issued 189 220
Onerous contracts issued 0 0
Total $ 189 $ 220