Derivative Financial Instruments and Fair Value Measurements - Impact of Changes in Fair Values of Derivatives Designated as Cash Flow Hedges on OCI, AOCI and Earnings (Details) - Cross-currency swap - Cash flow hedge - Designated as hedging instrument - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Derivative [Line Items]
Gain (Loss) Recognized in OCI	$ 2.2	$ (0.9)	$ (3.1)	$ 4.8
Interest and Other Expenses , Net
Derivative [Line Items]
Gain (Loss) Reclassified from AOCI into Income	$ (2.0)	$ (1.0)	$ 3.2	$ 4.7