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	Sep. 30, 2021	Dec. 31, 2020
Derivatives, Fair Value [Line Items]
Assets	$ 12.6	$ 13.1
Liabilities	1,056.6	1,125.0
Not designated as hedging instrument | Foreign currency forward contracts | Accounts receivable, net
Derivatives, Fair Value [Line Items]
Assets	0.1	1.0
Not designated as hedging instrument | Foreign currency forward contracts | Accrued liabilities
Derivatives, Fair Value [Line Items]
Liabilities	2.1	0.0
Cash flow hedge | Designated as hedging instrument | Cross-currency swap | Prepaid expenses and other assets
Derivatives, Fair Value [Line Items]
Assets	12.5	12.1
Cash flow hedge | Designated as hedging instrument | Foreign currency forward contracts | Accrued liabilities
Derivatives, Fair Value [Line Items]
Liabilities	0.2	0.0
Net Investment Hedging | Designated as hedging instrument | Cross-currency swap | Accrued liabilities
Derivatives, Fair Value [Line Items]
Liabilities	15.9	30.5
Net Investment Hedging | Designated as hedging instrument | Euro Notes | Long-term debt
Derivatives, Fair Value [Line Items]
Liabilities	$ 1,038.4	$ 1,094.5