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Performance B.6.1. Income tax expense (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Income tax (charge) credit      
Withholding tax $ (75) $ (81) $ (70)
Other income tax relating to the current year (203) (170) (165)
Adjustments in respect of prior years (6) (10) (39)
Total (284) (261) (274)
Deferred tax (charge) credit      
Origination and reversal of temporary differences (3) 44 168
Effect of change in tax rates 1 1 0
Tax income (expense) before valuation allowances (2) 45 168
(Increase)/decrease in unrecognised deferred tax assets and impairment 3 (209) (114)
Total 1 (164) 54
Adjustments in respect of prior years 2 1 (2)
Deferred tax expense (income) and adjustments 3 (163) 52
Income Tax Calculation:      
Profit before tax 552 175 238
Tax at the weighted average statutory rate (139) (27) (47)
Effect of:      
Items taxed at a different rate 29 10 37
Change in tax rates on deferred tax balances 1 1 0
Expenditure not deductible and income not taxable (92) (121) 1
Unrelieved withholding tax (74) (80) (68)
Accounting for associates and joint ventures 16 13 9
Movement in deferred tax on unremitted earnings (21) (2) 1
Unrecognized / recognized of previously unrecognized deferred tax assets 3 (209) (114)
Adjustments in respect of prior years (4) (9) (41)
Tax expense $ (281) $ (424) $ (222)
Weighted average statutory tax rate 25.20% 15.40% 19.70%
Effective tax rate 50.90% 242.30% 93.30%
Discontinued operations      
Income Tax Calculation:      
Profit before tax $ (3) $ 4 $ 116
Tax at the weighted average statutory rate 1 (1) (27)
Effect of:      
Items taxed at a different rate 0 0 0
Change in tax rates on deferred tax balances 0 0 0
Expenditure not deductible and income not taxable (1) 1 26
Unrelieved withholding tax 0 0 0
Accounting for associates and joint ventures 0 0 0
Movement in deferred tax on unremitted earnings 0 0 0
Unrecognized / recognized of previously unrecognized deferred tax assets 0 0 (2)
Adjustments in respect of prior years 0 0 0
Tax expense 0 0 (3)
Aggregate continuing and discontinued operations      
Income Tax Calculation:      
Profit before tax 549 179 354
Tax at the weighted average statutory rate (138) (28) (74)
Effect of:      
Items taxed at a different rate 29 10 37
Change in tax rates on deferred tax balances 1 1 0
Expenditure not deductible and income not taxable (93) (120) 27
Unrelieved withholding tax (74) (80) (68)
Accounting for associates and joint ventures 16 13 9
Movement in deferred tax on unremitted earnings (21) (2) 1
Unrecognized / recognized of previously unrecognized deferred tax assets 3 (209) (116)
Adjustments in respect of prior years (4) (9) (41)
Tax expense $ (281) $ (424) $ (225)
Weighted average statutory tax rate 25.10% 15.60% 20.90%
Effective tax rate 51.20% 236.90% 63.60%
Bottom of range      
Effect of:      
Weighted average statutory tax rate 10.00% 10.00% 10.00%
Top of range      
Effect of:      
Weighted average statutory tax rate 35.00% 35.00% 35.00%