Derivatives and Hedging Activities - Narrative (Details) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021 USD ($) derivative	Jun. 30, 2020 USD ($)	Jun. 30, 2021 USD ($) derivative	Jun. 30, 2020 USD ($)	Dec. 31, 2020 USD ($) derivative	Jun. 30, 2015 EUR (€)
4.50% Senior Notes due September 2023
Derivative [Line Items]
Debt interest rate	4.50%		4.50%
Foreign currency forward and option contracts
Derivative [Line Items]
Decrease in translated value	$ (1.8)		$ (1.8)		$ (0.3)
Foreign currency forward and option contracts | Designated as hedging instruments
Derivative [Line Items]
Maximum original maturity of foreign currency forward contracts			12 months
Net unrealized gain (loss) related to cash flow hedging activities	$ 1.2	$ (2.2)	$ 3.4	$ 2.8
Estimate of net unrealized derivative losses included in AOCI to be reclassified into earnings in next twelve months			$ 0.4
Foreign currency forward and option contracts | Derivatives not designated as hedging instruments
Derivative [Line Items]
Maximum original maturity of foreign currency forward contracts			12 months
Interest rate swaps
Derivative [Line Items]
Number of derivative instruments outstanding | derivative	0		0		0
EUR - Denominated debt | Net investment hedge | 4.50% Senior Notes due September 2023
Derivative [Line Items]
Debt instrument face amount | €						€ 400,000,000.0
Debt interest rate						4.50%
EUR - Denominated debt | Designated as hedging instruments | Net investment hedge
Derivative [Line Items]
Decrease in translated value	$ 26.0		$ 26.0
Decrease in translated value net after tax	$ 19.5		$ 19.5