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Investments in subsidiary undertakings, joint ventures and associates - Income statement (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Income statement:      
Revenue $ 10,740 $ 9,740 $ 8,985
Loss after tax for the year 2,415 1,712 (997)
The above loss for the year includes the following      
Depreciation and amortisation (523) (524) (494)
Interest income 3,095 2,947 2,597
Income tax credit (824) (560) (478)
Mainland China joint venture      
Income statement:      
Revenue 3,491 1,676 1,023
Loss after tax for the year 282 (733) (550)
The above loss for the year includes the following      
Depreciation and amortisation (38) (39) (43)
Interest income 582 543 569
Interest expense (2) (2) (3)
Income tax credit $ (36) $ 422 $ 140