v3.24.0.1
Earnings per share - Schedule of Earnings per Share (Details) - CHF (SFr)
SFr / shares in Units, SFr in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Earnings per share [line items]      
Net income / (loss) SFr 79,600 SFr 57,700 SFr (170,200)
Class A shares      
Earnings per share [line items]      
Weighted number of outstanding shares (in shares) 284,262,802 282,195,495 264,171,208
Number of shares with dilutive effects (in shares) 3,306,122 2,354,500 0
Weighted number of outstanding shares (diluted and undiluted) (in shares) 287,568,924 284,549,995 264,171,208
Net income / (loss) SFr 70,900 SFr 51,400 SFr (156,000)
Basic EPS (CHF) (in CHF per share) SFr 0.25 SFr 0.18 SFr (0.59)
Diluted EPS (CHF) (in CHF per share) SFr 0.25 SFr 0.18 SFr (0.59)
Class B      
Earnings per share [line items]      
Weighted number of outstanding shares (in shares) 345,437,500 345,437,500 241,333,048
Number of shares with dilutive effects (in shares) 11,446,403 6,891,423 0
Weighted number of outstanding shares (diluted and undiluted) (in shares) 356,883,903 352,328,923 241,333,048
Net income / (loss) SFr 8,600 SFr 6,300 SFr (14,200)
Basic EPS (CHF) (in CHF per share) SFr 0.02 SFr 0.02 SFr (0.06)
Diluted EPS (CHF) (in CHF per share) SFr 0.02 SFr 0.02 SFr (0.06)