| Dec 31, 2017 | Dec 31, 2018 | Dec 31, 2019 | Dec 31, 2020 | Dec 31, 2021 | Dec 31, 2022 |
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Net cash inflow from operating activities | 1,408 | 1,694 | 1,851 | 2,055 | 2,033 | 701 |
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Acquisitions classified as investing activities | - | 299 | 161 | 178 | 386 | 236 |
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Disposals of investments and subsidiaries | - | - | - | - | 28 | 38 |
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Purchases of property, plant and equipment | 289 | 315 | 339 | 218 | 263 | 208 |
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Purchases of other intangible assets (including capitalised computer software) | 37 | 60 | 55 | 54 | 30 | 15 |
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Proceeds on disposal of property, plant and equipment | 8 | 10 | 174 | 11 | 9 | 13 |
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Net cash (outflow)/inflow from investing activities | -500 | 185 | 1,760 | -168 | -642 | -409 |
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Repayment of lease liabilities | - | - | 250 | 300 | 321 | 310 |
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Share option proceeds | 6 | 1 | 1 | - | 4 | 1 |
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Cash consideration received from non-controlling interests | - | - | - | - | 40 | - |
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Payments from changes in ownership interests in subsidiaries that do not result in loss of control | - | - | - | - | 135 | 84 |
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Share repurchases and buybacks | 504 | 207 | 44 | 290 | 819 | 863 |
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Proceeds from issue of bonds | - | - | - | 916 | - | - |
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Repayments of borrowings, classified as financing activities | - | - | - | - | 397 | 221 |
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Payments For Financing And Share Issue Costs | 1 | 4 | 6 | 7 | 0 | 0 |
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Equity dividends paid | 752 | 747 | 751 | 122 | 315 | 365 |
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Dividends paid to non-controlling interests in subsidiary undertakings | 88 | 106 | 96 | 83 | 115 | 70 |
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Net cash outflow from financing activities | -786 | -1,614 | -2,922 | -250 | -2,057 | -1,911 |
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Net (decrease)/increase in cash and cash equivalents | 123 | 265 | 688 | 1,637 | -666 | -1,619 |
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Translation of cash and cash equivalents | -27 | -61 | -90 | -99 | -130 | 64 |
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