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Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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

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Debt - Summary of Long Term Debt (Details) € in Millions, $ in Millions	Dec. 31, 2019 USD ($)	Dec. 31, 2019 EUR (€)	Dec. 31, 2018 USD ($)	Sep. 30, 2018	May 31, 2013
Debt Instrument [Line Items]
Total debt	$ 200.8		$ 239.1
Deferred financing costs	(3.0)		(3.5)
Less: Debt payable within one year	2.6		2.3
Long-term debt	$ 198.2		236.8
Senior notes \| 2021 Senior Notes (5.25% fixed rate) due May 2021
Debt Instrument [Line Items]
Fixed rate of interest (as a percent)	5.25%	5.25%			5.25%
Total debt	$ 175.0		175.0
Secured debt \| Global Revolving Credit Facilities (variable rates) due December 2023
Debt Instrument [Line Items]
Total debt	$ 21.6		57.9
Secured debt \| Second German Loan Agreement (2.45% fixed rate) due in quarterly installments ending September 2022
Debt Instrument [Line Items]
Fixed rate of interest (as a percent)	2.45%	2.45%
Total debt	$ 3.5	€ 3.1	4.8
Secured debt \| Third German Loan Agreement (1.45% fixed rate)
Debt Instrument [Line Items]
Fixed rate of interest (as a percent)	1.45%	1.45%		1.45%
Total debt	$ 3.7	€ 3.3	$ 4.9