v3.25.4
SHARE-BASED COMPENSATION - Summary of Weighted-Average Strike Price (Details)
12 Months Ended
Dec. 31, 2025
shares
SFr / shares
Dec. 31, 2024
shares
SFr / shares
Disclosure of terms and conditions of share-based payment arrangement [line items]    
Beginning balance (in shares) 1,282,251 0
Granted (in shares) 415,519 1,400,785
Settled (in shares) (206,743) (99,186)
Forfeited (in shares) (50,396) (19,348)
Ending balance (in shares) 1,440,631 1,282,251
SARs    
Disclosure of terms and conditions of share-based payment arrangement [line items]    
Beginning balance (in shares) 461,244 0
Granted (in shares) 0 471,729
Settled (in shares) (79,474) 0
Forfeited (in shares) (21,238) (10,485)
Ending balance (in shares) 360,532 461,244
Weighted average strike price, beginning balance period (in chf per share) | SFr / shares SFr 33.88 SFr 0
Weighted average strike price, granted (in chf per share) | SFr / shares 0 33.88
Weighted average strike price, settled (in chf per share) | SFr / shares 33.74 0
Weighted average strike price, forfeited (in chf per share) | SFr / shares 33.57 33.57
Weighted average strike price, ending balance (in chf per share) | SFr / shares SFr 33.93 SFr 33.88