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Shareholders' equity Dividends Declared (Details)
3 Months Ended
Mar. 31, 2023
$ / shares
Mar. 31, 2023
SFr / shares
Mar. 31, 2022
$ / shares
Mar. 31, 2022
SFr / shares
United States of America, Dollars        
Equity, Class of Treasury Stock [Line Items]        
Common Stock, Dividends, Per Share, Declared | $ / shares $ 0.83   $ 0.80  
Switzerland, Francs        
Equity, Class of Treasury Stock [Line Items]        
Common Stock, Dividends, Per Share, Declared | SFr / shares   SFr 0.77   SFr 0.74