v3.24.0.1
Intangible assets (Tables)
 12 Months Ended
Dec. 31, 2023
Intangible assets and goodwill [abstract]  
Schedule of Intangible Assets
(CHF in millions)Patents, licenses and other rightsSoftwareGoodwillTotal
Cost at January 1, 202252.8 21.4 1.8 76.0 
Accumulated Amortization at January 1, 2022(10.9)(7.6)— (18.5)
Net book amount at January 1, 202241.9 13.8 1.8 57.5 
Twelve month period ended December 31, 2022
Opening net book amounts41.9 13.8 1.8 57.5 
Additions16.4 6.3 — 22.7 
Disposals— (0.5)— (0.5)
Amortization(4.1)(5.2)— (9.3)
Net book value at December 31, 202254.2 14.4 1.8 70.3 
Cost at December 31, 202269.2 25.9 1.8 96.9 
Accumulated Amortization at December 31, 2022(15.0)(11.6)— (26.6)
Net book amount at December 31, 202254.2 14.4 1.8 70.3 
Twelve month period ended December 31, 2023
Opening net book amounts54.2 14.4 1.8 70.3 
Additions1.2 3.1 — 4.4 
Amortization(4.5)(5.5)— (10.1)
Currency Translation— (0.1)— (0.1)
Net book value at December 31, 202350.9 11.9 1.8 64.6 
Cost at December 31, 202370.4 29.0 1.8 101.2 
Accumulated Amortization at December 31, 2023(19.6)(17.1)— (36.6)
Net book amount at December 31, 202350.9 11.9 1.8 64.6