Financial Instruments and Fair Value Measurements - Amount of Gains (Losses) Recognized in Accumulated Other Comprehensive Income Net of Reclassification into Earnings (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Fair Value Disclosures [Abstract]
Interest Rate Swap	$ 1.7	$ (3.3)	$ (8.6)	$ (17.0)