v3.25.4
INTANGIBLE ASSETS (Details) - CHF (SFr)
SFr in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Reconciliation of changes in intangible assets other than goodwill [abstract]    
Intangible assets other than goodwill at beginning of period SFr 1,084.4  
Intangible assets other than goodwill at end of period 934.5 SFr 1,084.4
Brands and customers relationships    
Reconciliation of changes in intangible assets other than goodwill [abstract]    
Intangible assets other than goodwill at beginning of period 609.1  
Intangible assets other than goodwill at end of period 292.3 609.1
Licenses and rights    
Reconciliation of changes in intangible assets other than goodwill [abstract]    
Intangible assets other than goodwill at beginning of period 265.6  
Intangible assets other than goodwill at end of period 410.9 265.6
Software    
Reconciliation of changes in intangible assets other than goodwill [abstract]    
Intangible assets other than goodwill at beginning of period 201.8  
Intangible assets other than goodwill at end of period 219.2 201.8
Other intangible assets    
Reconciliation of changes in intangible assets other than goodwill [abstract]    
Intangible assets other than goodwill at beginning of period 7.9  
Intangible assets other than goodwill at end of period 12.1 7.9
Principal amount    
Reconciliation of changes in intangible assets other than goodwill [abstract]    
Intangible assets other than goodwill at beginning of period 3,250.0 3,260.3
Additions 312.0 101.9
Retirements and disposals (22.3) (194.1)
Reclassifications 60.2 76.4
Other 11.6 5.5
Intangible assets other than goodwill at end of period 3,611.5 3,250.0
Principal amount | Brands and customers relationships    
Reconciliation of changes in intangible assets other than goodwill [abstract]    
Intangible assets other than goodwill at beginning of period 1,957.7 1,955.8
Additions 3.1 0.0
Retirements and disposals 0.0 0.0
Reclassifications 0.0 0.0
Other 0.2 1.9
Intangible assets other than goodwill at end of period 1,961.0 1,957.7
Principal amount | Licenses and rights    
Reconciliation of changes in intangible assets other than goodwill [abstract]    
Intangible assets other than goodwill at beginning of period 500.6 652.1
Additions 218.7 2.0
Retirements and disposals 0.0 (153.5)
Reclassifications 0.0 0.0
Other (1.6) 0.0
Intangible assets other than goodwill at end of period 717.7 500.6
Principal amount | Software    
Reconciliation of changes in intangible assets other than goodwill [abstract]    
Intangible assets other than goodwill at beginning of period 778.9 635.2
Additions 82.4 99.9
Retirements and disposals (22.2) (32.6)
Reclassifications 60.2 76.4
Other 0.6 0.0
Intangible assets other than goodwill at end of period 899.9 778.9
Principal amount | Other intangible assets    
Reconciliation of changes in intangible assets other than goodwill [abstract]    
Intangible assets other than goodwill at beginning of period 12.8 17.2
Additions 7.8 0.0
Retirements and disposals (0.1) (8.0)
Reclassifications 0.0 0.0
Other 12.4 3.6
Intangible assets other than goodwill at end of period 32.9 12.8
Accumulated depreciation and impairment    
Reconciliation of changes in intangible assets other than goodwill [abstract]    
Intangible assets other than goodwill at beginning of period (2,165.6) (1,730.4)
Retirements and disposals 22.3 194.1
Reclassifications 0.0 (65.5)
Other (14.9) (13.9)
Amortisation (518.8) (549.9)
Intangible assets other than goodwill at end of period (2,677.0) (2,165.6)
Accumulated depreciation and impairment | Brands and customers relationships    
Reconciliation of changes in intangible assets other than goodwill [abstract]    
Intangible assets other than goodwill at beginning of period (1,348.6) (1,026.9)
Retirements and disposals 0.0 0.0
Reclassifications 0.0 0.0
Other 0.1 0.0
Amortisation (320.2) (321.7)
Intangible assets other than goodwill at end of period (1,668.7) (1,348.6)
Accumulated depreciation and impairment | Licenses and rights    
Reconciliation of changes in intangible assets other than goodwill [abstract]    
Intangible assets other than goodwill at beginning of period (235.0) (319.5)
Retirements and disposals 0.0 153.5
Reclassifications 0.0 0.0
Other (0.2) 0.0
Amortisation (71.6) (69.0)
Intangible assets other than goodwill at end of period (306.8) (235.0)
Accumulated depreciation and impairment | Software    
Reconciliation of changes in intangible assets other than goodwill [abstract]    
Intangible assets other than goodwill at beginning of period (577.1) (375.3)
Retirements and disposals 22.2 32.6
Reclassifications 0.0 (65.5)
Other (3.5) (13.9)
Amortisation (122.3) (155.0)
Intangible assets other than goodwill at end of period (680.7) (577.1)
Accumulated depreciation and impairment | Other intangible assets    
Reconciliation of changes in intangible assets other than goodwill [abstract]    
Intangible assets other than goodwill at beginning of period (4.9) (8.7)
Retirements and disposals 0.1 8.0
Reclassifications 0.0 0.0
Other (11.3) 0.0
Amortisation (4.7) (4.2)
Intangible assets other than goodwill at end of period SFr (20.8) SFr (4.9)