v3.25.4
RELATED-PARTY TRANSACTIONS - Summary of Related Party Balances (Details) - CHF (SFr)
SFr in Millions
Dec. 31, 2025
Dec. 31, 2024
Disclosure of transactions between related parties [line items]    
Current receivables SFr 0.1 SFr 0.0
Long-term note receivables 0.0 0.0
Other non-current assets 0.2 0.0
Total assets 0.3 0.0
Accounts payable 0.0 0.0
Accrued other liabilities 0.0 0.0
Non-current related party loan 0.0 0.0
Other non-current liabilities 0.0 0.1
Total liabilities 0.0 0.1
LG    
Disclosure of transactions between related parties [line items]    
Current receivables 0.0 1.8
Long-term note receivables 0.0 0.0
Other non-current assets 0.0 0.0
Total assets 0.0 1.8
Accounts payable 0.0 0.3
Accrued other liabilities 0.0 20.4
Non-current related party loan 0.0 0.0
Other non-current liabilities 0.0 0.0
Total liabilities SFr 0.0 SFr 20.7