Derivative Instruments and Hedging Activities - Balance Sheet (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Designated derivatives
Derivatives, Fair Value [Line Items]
Asset Derivatives	$ 27.3	$ 2.0
Foreign currency forward contracts | Designated derivatives | Prepaid expenses and other current assets
Derivatives, Fair Value [Line Items]
Asset Derivatives	1.0	2.0
Foreign currency forward contracts | Designated derivatives | Other accrued liabilities
Derivatives, Fair Value [Line Items]
Liability Derivatives	4.7	6.4
Foreign currency forward contracts | Non-designated derivatives | Prepaid expenses and other current assets
Derivatives, Fair Value [Line Items]
Asset Derivatives	3.3	1.8
Foreign currency forward contracts | Non-designated derivatives | Other accrued liabilities
Derivatives, Fair Value [Line Items]
Liability Derivatives	3.7	2.8
Cross-currency swap | Designated derivatives | Prepaid expenses and other current assets
Derivatives, Fair Value [Line Items]
Asset Derivatives	$ 26.3	$ 0.0