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Income tax (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Current tax: |  |  |
Current tax for the year | $ 17 | $ 31 | $ 32
Adjustment in respect of prior years | (5) | (28) | 2
Total current tax | 12 | 3 | 34
Deferred tax: |  |  |
Deferred tax for the year | (2) | (27) | (14)
Adjustments in respect of prior years | 3 | 3 | (1)
Total deferred tax | 1 | (24) | (15)
Income tax charge/(credit) | $ 13 | $ (21) | $ 19

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