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Other Expense (Income) - Other Items (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2020
Development and licensing income [Line Items]          
Loss on sale of investments $ 0.9        
Loss on investment activity     $ 1.8    
Impairment charge     2.2    
Deferred income 38.1   38.1   $ 57.1
SmartDose          
Development and licensing income [Line Items]          
Development and licensing income $ 0.2 $ 0.2 $ 0.6 $ 0.6