XML 298 R139.htm IDEA: XBRL DOCUMENT v3.25.1
Investments in subsidiary undertakings, joint ventures and associates - Reconciliation of carrying amounts (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Reconciliation of carrying amount          
Carrying amount of the Group's interest $ 2,412 $ 1,940 $ 2,412 $ 1,940  
Mainland China joint venture          
Reconciliation of carrying amount          
Total net assets 1,892 1,266 1,892 1,266  
Proportion owned by the joint venture partner $ 946 $ 633 946 633  
Interest in joint ventures held by partner (as a percent) 50.00% 50.00%      
Carrying amount of the Group's interest $ 946 $ 633 946 633  
Interest in joint ventures (as a percent) 50.00% 50.00%      
Dividends received     0 88 $ 0
Other individually immaterial joint ventures and associates          
Reconciliation of carrying amount          
Carrying amount of the Group's interest $ 1,466 $ 1,307 $ 1,466 $ 1,307