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Earnings per share (Tables)
12 Months Ended
Dec. 31, 2022
Earnings per share [abstract]  
Schedule of Earnings per share
20222022202120212020
Class AClass BClass AClass BClass A
Weighted number of outstanding shares282,195,495 345,437,500 264,171,208 241,333,048 265,684,627 
Weighted number of shares with dilutive effects2,354,500 6,891,423 — — — 
Weighted number of outstanding shares (diluted and undiluted)284,549,995 352,328,923 264,171,208 241,333,048 265,684,627 
Net income / (loss) (mCHF)51.4 6.3 (156.0)(14.2)(27.5)
Basic EPS (CHF)0.18 0.02 (0.59)(0.06)(0.10)
Diluted EPS (CHF)0.18 0.02 (0.59)(0.06)(0.10)