v3.25.4
FINANCIAL INSTRUMENTS & RISK - Exposure of Financial Assets and Liabilities to Currency Risk (Details) - Currency risk - CHF (SFr)
SFr in Millions
Dec. 31, 2025
Dec. 31, 2024
Euro    
Related party long-term payables    
Net statement of financial position exposure SFr 1,574.2 SFr 1,606.4
US Dollar    
Related party long-term payables    
Net statement of financial position exposure 2,946.6 3,192.3
Other    
Related party long-term payables    
Net statement of financial position exposure 4.2 2.6
Trade receivables | Euro    
Related party long-term payables    
Net statement of financial position exposure 4.0 8.6
Trade receivables | US Dollar    
Related party long-term payables    
Net statement of financial position exposure 1.1 1.8
Trade receivables | Other    
Related party long-term payables    
Net statement of financial position exposure 8.2 7.5
Trade payables | Euro    
Related party long-term payables    
Net statement of financial position exposure 19.7 21.5
Trade payables | US Dollar    
Related party long-term payables    
Net statement of financial position exposure 7.8 19.2
Trade payables | Other    
Related party long-term payables    
Net statement of financial position exposure 12.1 10.3
Sunrise Holding Bank facilities | Euro    
Related party long-term payables    
Net statement of financial position exposure 0.0 653.5
Sunrise Holding Bank facilities | US Dollar    
Related party long-term payables    
Net statement of financial position exposure 1,540.5 1,577.8
Sunrise Holding Bank facilities | Other    
Related party long-term payables    
Net statement of financial position exposure 0.0 0.0
Sunrise holding SPE notes | Euro    
Related party long-term payables    
Net statement of financial position exposure 1,165.8 351.3
Sunrise holding SPE notes | US Dollar    
Related party long-term payables    
Net statement of financial position exposure 975.5 1,115.9
Sunrise holding SPE notes | Other    
Related party long-term payables    
Net statement of financial position exposure 0.0 0.0
Sunrise holding senior notes | Euro    
Related party long-term payables    
Net statement of financial position exposure 267.8 269.9
Sunrise holding senior notes | US Dollar    
Related party long-term payables    
Net statement of financial position exposure 0.0 358.1
Sunrise holding senior notes | Other    
Related party long-term payables    
Net statement of financial position exposure 0.0 0.0
Cross currency swaps | Euro    
Related party long-term payables    
Net statement of financial position exposure 117.4 232.5
Cross currency swaps | US Dollar    
Related party long-term payables    
Net statement of financial position exposure 382.4 30.5
Cross currency swaps | Other    
Related party long-term payables    
Net statement of financial position exposure 0.0 0.0
FX Forwards | Euro    
Related party long-term payables    
Net statement of financial position exposure (0.1) 0.3
FX Forwards | US Dollar    
Related party long-term payables    
Net statement of financial position exposure 0.1 (0.9)
FX Forwards | Other    
Related party long-term payables    
Net statement of financial position exposure 0.3 (0.2)
Interest Rate Options | Euro    
Related party long-term payables    
Net statement of financial position exposure 0.0 0.0
Interest Rate Options | US Dollar    
Related party long-term payables    
Net statement of financial position exposure 0.0 0.0
Interest Rate Options | Other    
Related party long-term payables    
Net statement of financial position exposure 0.0 0.0
Interest Rate Swaps | Euro    
Related party long-term payables    
Net statement of financial position exposure 7.6 86.0
Interest Rate Swaps | US Dollar    
Related party long-term payables    
Net statement of financial position exposure 41.4 93.5
Interest Rate Swaps | Other    
Related party long-term payables    
Net statement of financial position exposure SFr 0.0 SFr 0.0