Financial Instruments and Risk Management (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Derivative [Line Items]
Total exposure to floating rate interest rates	4.00%	0.00%
Loss written-off resulting from non-performance of counterparties	$ 2.8
Foreign Exchange Contract
Derivative [Line Items]
Notional amounts of derivative contracts	160.0
Gain (loss) in other expense from undesignated foreign currency exchange contracts	$ (5.7)	$ 42.1