v3.25.4
FINANCIAL INSTRUMENTS & RISK - Liabilities Arising From Financing Activities (Details) - CHF (SFr)
SFr in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Changes in liabilities arising from financing activities [abstract]      
Liabilities arising from financing activities at beginning of period SFr 6,450.3 SFr 7,402.2 SFr 7,274.5
Cash flows from financing activities:      
Interest paid (261.3) (420.2) (422.5)
Borrowing of debt 1,260.8 0.0 0.0
Vendor financing additions 405.7 363.4 271.2
Repayments of debt and lease liabilities (1,344.4) (1,179.1) (107.6)
Principal payments on operating-related vendor financing (360.1) (327.9) (171.8)
Principal payments on capital-related vendor financing (70.6) (49.1) (124.8)
Payment of financing costs and debt premiums (19.3) 0.0 0.1
Net cash received related to derivative instruments (151.3) 52.3 117.1
Total cash flows from financing activities (540.5) (1,560.6) (438.3)
Losses on debt extinguishment 29.2 3.9  
Realized and unrealized (gains) losses on derivative instruments, net 290.1 (249.6) 524.4
Interest accruals 313.3 428.0 426.6
Assets acquired under leases 173.4 126.3 56.2
Assets acquired under capital-related vendor financing arrangements, including VAT 62.1 52.1 77.6
Effect of changes in foreign exchange rates (423.5) 287.4 (466.7)
Other related party charges   (51.8) 1.7
Other changes 223.3 (51.5) (53.7)
Liabilities arising from financing activities at end of period 6,577.7 6,450.3 7,402.2
Debt and accrued interest      
Changes in liabilities arising from financing activities [abstract]      
Liabilities arising from financing activities at beginning of period 4,734.2 5,537.3 5,942.1
Cash flows from financing activities:      
Interest paid (198.5) (359.2) (364.1)
Borrowing of debt 1,260.8    
Vendor financing additions 405.7 363.4 271.2
Repayments of debt and lease liabilities (1,223.4) (1,064.7) 0.0
Principal payments on operating-related vendor financing (360.1) (327.9) (171.8)
Principal payments on capital-related vendor financing (70.6) (49.1) (124.8)
Payment of financing costs and debt premiums (16.6)   0.1
Total cash flows from financing activities (202.7) (1,437.5) (389.4)
Losses on debt extinguishment 21.7 3.9  
Interest accruals 246.9 358.2 358.7
Assets acquired under capital-related vendor financing arrangements, including VAT 62.1 52.1 77.6
Effect of changes in foreign exchange rates (423.5) 271.8 (453.4)
Other related party charges   (51.8) 1.7
Other changes (3.0) 0.2 0.1
Liabilities arising from financing activities at end of period 4,435.7 4,734.2 5,537.3
Derivatives      
Changes in liabilities arising from financing activities [abstract]      
Liabilities arising from financing activities at beginning of period 432.9 607.3 (15.5)
Cash flows from financing activities:      
Net cash received related to derivative instruments (151.3) 52.3 117.1
Total cash flows from financing activities (151.3) 52.3 117.1
Realized and unrealized (gains) losses on derivative instruments, net 290.1 (249.6) 524.4
Effect of changes in foreign exchange rates   15.6 (13.3)
Other changes (1.2) 7.3 (5.4)
Liabilities arising from financing activities at end of period 570.5 432.9 607.3
Lease liabilities      
Changes in liabilities arising from financing activities [abstract]      
Liabilities arising from financing activities at beginning of period 1,219.3 1,257.6 1,347.9
Cash flows from financing activities:      
Interest paid (61.3) (61.0) (58.4)
Repayments of debt and lease liabilities (121.0) (114.4) (107.6)
Total cash flows from financing activities (182.3) (175.4) (166.0)
Interest accruals 61.3 69.8 67.9
Assets acquired under leases 173.4 126.3 56.2
Effect of changes in foreign exchange rates   0.0  
Other changes 5.5 (59.0) (48.4)
Liabilities arising from financing activities at end of period 1,277.2 1,219.3 SFr 1,257.6
Other (Assets)/ Liabilities      
Changes in liabilities arising from financing activities [abstract]      
Liabilities arising from financing activities at beginning of period 63.9    
Cash flows from financing activities:      
Interest paid (1.5)    
Payment of financing costs and debt premiums (2.7)    
Total cash flows from financing activities (4.2)    
Losses on debt extinguishment 7.5    
Interest accruals 5.1    
Other changes 222.0    
Liabilities arising from financing activities at end of period SFr 294.3 SFr 63.9