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Tax - Reconciliation Between Total Tax Rate and Tax Rate Before Exceptional Items and System Fund (Detail) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Disclosure of reconciliation between tax rate and tax rate before exceptional items and System Fund [abstract] |  |  |
Group income statement | $ 540 | $ 361 | $ (280)
Exceptional items (note 6) | 95 | 29 | 263
Foreign exchange gains (note 7) | (10) |  |
System Fund | 105 | 11 | 102
Profit/(loss) before exceptional items and System Fund | 730 | 401 | 85
Group income statement | 164 | 96 | (20)
Exceptional items (note 6) | 26 | 29 | 52
Foreign exchange gains (note 7) | 4 |  |
System Fund revenue | 0 |  |
Income tax expense before exceptional items and System Fund | $ 194 | $ 125 | $ 32
Group income statement | 30.40% | 26.60% | 7.10%
Average effective tax rate before exceptional items and System Fund | 26.60% | 31.20% | 37.60%

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