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Equity (Details 3) $ in Millions | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2020 SFr / shares | Dec. 31, 2019 SFr / shares | Dec. 31, 2018 SFr / shares
Statement of changes in equity [abstract] |  |  |  |  |  |
Dividends payable, amount per share | SFr / shares |  |  |  | SFr 2.95 | SFr 2.85 | SFr 2.80
Dividends recognised as distributions to owners | $ | $ 6,987 | $ 6,645 | $ 6,966 |  |  |

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