v3.19.3.a.u2

Derivative Instruments and Hedging Activities (Details) € in Millions	12 Months Ended
	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2019 EUR (€)	Dec. 31, 2018 EUR (€)
Derivative [Line Items]
Long-term Debt \| €				€ 299.4
Unrealized gain (loss) on derivatives, net of tax	$ 0	$ 800,000	$ 200,000
Nonoperating gains	4,700,000	2,900,000
Other non-operating expense, net [Member]
Derivative [Line Items]
Derivative instruments, net gain (loss)	6,400,000	1,100,000
Additional Foreign Currency Forward Contracts [Member]
Derivative [Line Items]
Notional amount of derivative	10,000,000
Foreign Exchange Forward [Member]
Derivative [Line Items]
Notional amount of derivative	$ 202,700,000	194,800,000		180.8	€ 170.2
Average duration of derivatives	1 month
Senior EUR Notes [Member]
Derivative [Line Items]
Long-term Debt	$ 492,500,000			439.1
Senior EUR Notes [Member] \| Designated as Hedging Instrument [Member]
Derivative [Line Items]
Unrealized gain (loss) on derivatives, net of tax	15,700,000
Tax on unrealized gain (loss) on net investment hedge	6,000,000.0
Net Investment Hedging [Member] \| Senior EUR Notes [Member] \| Designated as Hedging Instrument [Member]
Derivative [Line Items]
Long-term Debt	493,500,000	503,600,000		€ 440.0	€ 440.0
Unrealized gain (loss) on derivatives, net of tax	(9,000,000.0)	16,800,000
Tax on unrealized gain (loss) on net investment hedge	$ 2,500,000	$ (4,700,000)

Average period remaining before foreign currency exchange rate derivatives mature or expire, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Nominal or face amount used to calculate payment on derivative.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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The aggregate amount of income or expense from ancillary business-related activities (that is to say, excluding major activities considered part of the normal operations of the business).

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Amount after 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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Amount of tax expense (benefit), before reclassification adjustments, related to 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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