Financial Instruments and Fair Value Measurements - Assets and Liabilities Associated with Interest Rate Derivatives (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Assets from interest rate risk management activities:
Other long-term assets	$ 0.0	$ 1.9
Liabilities from interest rate risk management activities:
Accrued expenses and other current liabilities	4.4	2.8
Long-term interest rate swap liabilities	41.7	4.4
Total long-term liabilities from interest rate risk management activities	$ 46.1	$ 7.2

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