Other (Income)/Expense, Net (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Other Income and Expenses [Abstract]
Foreign currency transaction loss	$ 13.6
Gain in OCI on loans impacted by business conditions	5.0
Other income (expense), net	$ 2.6
Curtailment gain/(loss)		$ 0.5	$ 0.7
Restructuring, settlement and impairment provisions			$ 2.2