Other Expense (Income) - Development and Licensing Income (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Development and licensing income [Line Items]
Development and licensing income	$ 0.2	$ 0.2	$ 0.4	$ 0.4
Deferred income	40.4		40.4		$ 34.9
SmartDose
Development and licensing income [Line Items]
Development and licensing income	$ 0.2	$ 0.2	$ 0.4	$ 0.4