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Subsequent events (Details) - USD ($)
$ in Millions
Jul. 31, 2024
Jul. 18, 2024
May 15, 2023
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Travel Health Business      
Subsequent Event [Line Items]      
Cash purchase price for sale of business     $ 270.2
Development-Based Milestones | Disposal Group, Disposed of by Sale, Not Discontinued Operations | Travel Health Business      
Subsequent Event [Line Items]      
Milestone payments receivable     $ 80.0
Subsequent Event | Disposal Group, Disposed of by Sale, Not Discontinued Operations | RSDL      
Subsequent Event [Line Items]      
Cash purchase price for sale of business $ 75.0    
Milestone payments receivable $ 5.0    
Disposal group, including discontinued operation, additional period 3 years    
Subsequent Event | Development-Based Milestones | Disposal Group, Disposed of by Sale, Not Discontinued Operations | Travel Health Business      
Subsequent Event [Line Items]      
Increase in contingent consideration, asset   $ 10.0  
Jansen Pharmaceuticals, Inc. | Subsequent Event      
Subsequent Event [Line Items]      
Proceeds from legal settlements $ 50.0