Derivatives and Risk Management - Derivatives and Risk Management Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2019	May 28, 2019
Foreign Currency Forward & Foreign Currency Option Contracts [Member]
Derivative [Line Items]
Derivative, Notional Amount	$ 185.8	$ 180.1
Currency Swap [Member]
Derivative [Line Items]
Derivative, Notional Amount		224.2
Interest Rate Swap [Member] | Debt [Member]
Derivative [Line Items]
Derivative, Liquidation Proceeds, Monetary Amount	$ 5.6
Fair Value Liability At Date Of Dedesignation			$ 9.7
Derivative, Amount of Hedged Item, Through May 2020		1,000.0
Derivative, Amount of Hedged Item, Through May 2021		900.0
Derivative, Amount of Hedged Item, Through May 2022		750.0
Derivative, Amount of Hedged Item, Through May 2023		600.0
Derivative, Amount of Hedged Item, Through May 2024		$ 500.0