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Shareholders' equity Dividends Declared (Details) | 3 Months Ended | 6 Months Ended
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Jun. 30, 2021 SFr / shares | Jun. 30, 2021 $ / shares | Jun. 30, 2020 SFr / shares | Jun. 30, 2020 $ / shares | Jun. 30, 2021 SFr / shares | Jun. 30, 2021 $ / shares | Jun. 30, 2020 SFr / shares | Jun. 30, 2020 $ / shares
United States of America, Dollars |  |  |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |  |
Common Stock, Dividends, Per Share, Declared | $ / shares |  | $ 0.80 |  | $ 0.78 |  | $ 1.58 |  | $ 1.53
Switzerland, Francs |  |  |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |  |
Common Stock, Dividends, Per Share, Declared | SFr / shares | SFr 0.71 |  | SFr 0.75 |  | SFr 1.41 |  | SFr 1.47 |

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- Definition Aggregate dividends declared during the period for each share of common stock outstanding. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Details
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- Details
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