Shareholders' equity Dividends Declared (Details)	3 Months Ended
	Mar. 31, 2024 $ / shares	Mar. 31, 2024 SFr / shares	Mar. 31, 2023 $ / shares	Mar. 31, 2023 SFr / shares
United States of America, Dollars
Equity, Class of Treasury Stock [Line Items]
Common Stock, Dividends, Per Share, Declared | $ / shares	$ 0.86		$ 0.83
Switzerland, Francs
Equity, Class of Treasury Stock [Line Items]
Common Stock, Dividends, Per Share, Declared | SFr / shares		SFr 0.75		SFr 0.77