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Exceptional items - Summary of Tax Impacts On Exceptional Items (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Disclosure of tax impacts on exceptional items [Line Items] |  |  |
Current tax expense | $ 176 | $ 143 | $ 34
Deferred tax expense | (12) | (47) | (54)
Total current and deferred tax | 164 | 96 | (20)
Exceptional Items [member] |  |  |
Disclosure of tax impacts on exceptional items [Line Items] |  |  |
Current tax expense | 33 | (2) | 14
Deferred tax expense | (7) | 5 | 38
Total current and deferred tax | 26 | 3 | 52
Derecognition of right-of-use assets and lease liabilities | Exceptional Items [member] |  |  |
Disclosure of tax impacts on exceptional items [Line Items] |  |  |
Current tax expense | 0 | 0 | 0
Deferred tax expense | 0 | 0 | (4)
Provision for onerous contractual expenditure | Exceptional Items [member] |  |  |
Disclosure of tax impacts on exceptional items [Line Items] |  |  |
Current tax expense | 0 | 0 | 0
Deferred tax expense | 0 | 0 | 2
Reorganisation costs | Exceptional Items [member] |  |  |
Disclosure of tax impacts on exceptional items [Line Items] |  |  |
Current tax expense | 0 | 0 | 3
Deferred tax expense | 0 | 0 | 2
Costs of ceasing operations in Russia | Exceptional Items [member] |  |  |
Disclosure of tax impacts on exceptional items [Line Items] |  |  |
Current tax expense | 3 | 0 | 0
Deferred tax expense | 0 | 0 | 0
Commercial litigation and disputes | Exceptional Items [member] |  |  |
Disclosure of tax impacts on exceptional items [Line Items] |  |  |
Current tax expense | 8 | 0 | 0
Deferred tax expense | (2) | 4 | 0
Integration costs | Exceptional Items [member] |  |  |
Disclosure of tax impacts on exceptional items [Line Items] |  |  |
Current tax expense | 0 | 0 | 1
Deferred tax expense | 0 | 0 | 0
Share of losses of associate | Exceptional Items [member] |  |  |
Disclosure of tax impacts on exceptional items [Line Items] |  |  |
Current tax expense | 15 | 0 | 0
Deferred tax expense | 0 | 0 | 0
Impairment loss on financial assets | Exceptional Items [member] |  |  |
Disclosure of tax impacts on exceptional items [Line Items] |  |  |
Current tax expense | 0 | 0 | 4
Deferred tax expense | 0 | 0 | 2
Other net impairment reversals/(charges) | Exceptional Items [member] |  |  |
Disclosure of tax impacts on exceptional items [Line Items] |  |  |
Current tax expense | 1 | 0 | 6
Deferred tax expense | (5) | 1 | 37
Financial Expenses [Member] | Exceptional Items [member] |  |  |
Disclosure of tax impacts on exceptional items [Line Items] |  |  |
Current tax expense | 0 | 0 | 0
Deferred tax expense | 0 | 0 | 3
Fair value gains on contingent purchase consideration | Exceptional Items [member] |  |  |
Disclosure of tax impacts on exceptional items [Line Items] |  |  |
Current tax expense | 0 | 0 | 0
Deferred tax expense | 0 | 0 | (4)
Adjustments in respect of prior years | Exceptional Items [member] |  |  |
Disclosure of tax impacts on exceptional items [Line Items] |  |  |
Current tax expense | 6 | (2) | 0
Deferred tax expense | $ 0 | $ 0 | $ 0

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