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Transactions with related parties (Details 2)
$ in Millions
 12 Months Ended
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2021
CHF (SFr)
Dec. 31, 2020
USD ($)
Dec. 31, 2020
CHF (SFr)
Dec. 31, 2018
USD ($)
Disclosure of transactions between related parties [line items]            
Key management personnel compensation $ 79.8 $ 70.0   $ 79.2    
Novartis Pension Fund [member]            
Disclosure of transactions between related parties [line items]            
Borrowings credit facility uncommitted           $ 500.0
Key management personnel of entity or parent [member]            
Disclosure of transactions between related parties [line items]            
Key management personnel compensation $ 70.4 $ 60.1   $ 69.4    
Dr. Alex Krauer [member]            
Disclosure of transactions between related parties [line items]            
Key management personnel compensation | SFr     SFr 60,000   SFr 60,000