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Hedging Transaction and Derivative Instruments - Fair Value of Derivatives Qualifying as Hedging Instrument (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Derivative Instruments, Gain (Loss) [Line Items]
Document Fiscal Year Focus	2018
Unrealized net gains (losses) arising during period	$ (2.0)	$ 3.4	$ (2.5)
Foreign Exchange Contract [Member] | Designated as Hedging Instrument | Cash Flow Hedging | Other expense (income), net
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivatives	0.0	(0.3)	(0.3)
Foreign Currency Economic Hedge | Not Designated as Hedging Instrument | Not Designated as Hedging Instrument, Economic Hedge [Member] | Other expense (income), net
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivatives	(0.9)	0.3	(2.0)
Interest Rate Swap [Member] | Designated as Hedging Instrument | Cash Flow Hedging | Other expense (income), net
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivatives	0.0	0.0	0.0
Cash flow hedges | Foreign Exchange Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	(2.5)	3.6	(2.5)
Cash flow hedges | Interest Rate Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	$ 0.1	$ 0.3	$ (0.7)

X

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This is focus fiscal year of the document report in CCYY format. For a 2006 annual report, which may also provide financial information from prior periods, fiscal 2006 should be given as the fiscal year focus. Example: 2006.

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Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

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Amount before tax of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).

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