v3.25.4
EQUITY (Details) - CHF (SFr)
SFr / shares in Units, SFr in Thousands
1 Months Ended 12 Months Ended
Jul. 31, 2025
May 31, 2025
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Disclosure of classes of share capital [line items]          
Number of treasury shares purchased (in shares)     1,000,000    
Purchase of treasury shares     SFr 100    
Number of shares repurchased for share-based payment arrangement (in shares)     99,186    
Capital contributions (distributions)       SFr 1,177,700 SFr (64,200)
Dividends paid, ordinary shares   SFr 240,400      
Other Reserves          
Disclosure of classes of share capital [line items]          
Decrease through change in service agreement, equity         50,900
Other reserves, increase (decrease) through income tax effects allocated directly to equity         SFr 6,100
Other Reserves | Liberty Global Europe Holding BV          
Disclosure of classes of share capital [line items]          
Other reserves, increase (decrease) through income tax effects allocated directly to equity       25,100  
Capital contributions (distributions)       SFr 1,106,200  
Class A Common Shares          
Disclosure of classes of share capital [line items]          
Number of shares authorised (in shares)     71,276,895 69,759,702  
Par value per share (in CHF per share) SFr 0.10   SFr 0.10    
Number of shares outstanding (in shares)     70,108,614 68,858,888 69,759,702
Number of treasury shares purchased (in shares)     0 1,000,000  
Number of shares repurchased for share-based payment arrangement (in shares)     1,232,533 99,186  
Shares issued during period (in shares) 1,500,000        
Dividends paid, ordinary shares per share (in CHF per share)   SFr 3.33      
Dividends proposed or declared before financial statements authorised for issue but not recognised as distribution to owners per share (in CHF per share)     SFr 3.42    
Class B Common Shares          
Disclosure of classes of share capital [line items]          
Number of shares authorised (in shares)     25,805,386 25,977,316  
Par value per share (in CHF per share)     SFr 0.01    
Number of shares outstanding (in shares)     25,805,386 25,977,316 25,977,316
Number of treasury shares purchased (in shares)     0 0  
Number of shares repurchased for share-based payment arrangement (in shares)     0 0  
Dividends paid, ordinary shares per share (in CHF per share)   SFr 0.33      
Dividends proposed or declared before financial statements authorised for issue but not recognised as distribution to owners per share (in CHF per share)     SFr 0.34