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Derivative Financial Instruments and Fair Value Measurements - Fair Value of Derivative and Non-Derivative Assets and Liabilities on the Consolidated Balance Sheets (Details) - USD ($) $ in Millions | Jun. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Derivatives, Fair Value [Line Items] |  |
Assets | $ 15.7 | $ 9.7
Liabilities | 1,009.6 | 1,008.9
Cash flow hedge | Designated as hedging instrument | Cross-currency swap | Prepaid expenses and other assets |  |
Derivatives, Fair Value [Line Items] |  |
Assets | 15.7 | 9.7
Net Investment Hedging | Designated as hedging instrument | Cross-currency swap | Accrued liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Liabilities | 4.1 | 6.0
Net Investment Hedging | Designated as hedging instrument | Euro Notes | Long-term debt |  |
Derivatives, Fair Value [Line Items] |  |
Liabilities | $ 1,005.5 | $ 1,002.9

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