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Income Taxes (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended				9 Months Ended
	Sep. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Mar. 31, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2012
Income Tax Examination [Line Items]
Income tax expense	$ 12.2		$ 13.4		$ 38.1	$ 27.4
Income before income tax	$ 40.2		$ 49.0		$ 101.4	$ 99.1
Effective Income Tax Rate Reconciliation, Percent	30.30%		27.30%		37.60%	27.60%
Deferred State and Local Income Tax Expense (Benefit)					$ 0.8
State and Local Jurisdiction | Minimum
Income Tax Examination [Line Items]
Statutes of limitation, period					2 years
State and Local Jurisdiction | Maximum
Income Tax Examination [Line Items]
Statutes of limitation, period					5 years
Domestic Tax Authority | Internal Revenue Service (IRS) | Earliest Tax Year
Income Tax Examination [Line Items]
Open tax year					2015
Foreign Tax Authority | Minimum
Income Tax Examination [Line Items]
Statutes of limitation, period					2 years
Foreign Tax Authority | Maximum
Income Tax Examination [Line Items]
Statutes of limitation, period					5 years
Foreign Tax Authority | Australian Taxation Office | Earliest Tax Year
Income Tax Examination [Line Items]
Open tax year					2014
Foreign Tax Authority | Secretariat of the Federal Revenue Bureau of Brazil
Income Tax Examination [Line Items]
Income tax expense	$ 1.6				$ 1.6
Income Tax Examination, Interest Expense	0.3		$ 0.3		$ 0.9	$ 0.9
Foreign Tax Authority | Secretariat of the Federal Revenue Bureau of Brazil | Earliest Tax Year
Income Tax Examination [Line Items]
Open tax year					2013
Foreign Tax Authority | Secretariat of the Federal Revenue Bureau of Brazil | Tax Year 2007 to 2010
Income Tax Examination [Line Items]
Unrecognized Tax Benefits	$ 33.4				$ 33.4
Foreign Tax Authority | Secretariat of the Federal Revenue Bureau of Brazil | Tax Year 2007 to 2012
Income Tax Examination [Line Items]
Unrecognized Tax Benefits							$ 44.5
Income Tax Contingency, Potential Assessment, Acquisition, Fair Value of Liabilities Accrued							$ 43.3
Foreign Tax Authority | Secretariat of the Federal Revenue Bureau of Brazil | Tax Year 2008 to 2010
Income Tax Examination [Line Items]
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions		$ 5.6
Unrecognized Tax Benefits		27.5
Foreign Tax Authority | Secretariat of the Federal Revenue Bureau of Brazil | Tax Year 2011
Income Tax Examination [Line Items]
Effective Income Tax Rate Reconciliation, Prior Year Income Taxes, Amount				$ 5.6
Foreign Tax Authority | Secretariat of the Federal Revenue Bureau of Brazil | Minimum
Income Tax Examination [Line Items]
Penalty rate	75.00%				75.00%
Foreign Tax Authority | Secretariat of the Federal Revenue Bureau of Brazil | Maximum | Tax Year 2007
Income Tax Examination [Line Items]
Penalty rate	150.00%				150.00%
Foreign Tax Authority | Canada Revenue Agency | Earliest Tax Year
Income Tax Examination [Line Items]
Open tax year					2014
Foreign Tax Authority | Federal Ministry of Finance, Germany | Earliest Tax Year
Income Tax Examination [Line Items]
Open tax year					2014
Foreign Tax Authority | Swedish Tax Agency (Skatteverket) | Earliest Tax Year
Income Tax Examination [Line Items]
Open tax year					2013
Foreign Tax Authority | Her Majesty's Revenue and Customs (HMRC) | Earliest Tax Year
Income Tax Examination [Line Items]
Open tax year					2017
Income tax expense (benefit) | Foreign Tax Authority | Secretariat of the Federal Revenue Bureau of Brazil | Tax Year 2008 to 2010
Income Tax Examination [Line Items]
Quantifying Misstatement in Current Year Financial Statements, Amount		5.6
Net income (loss) | Foreign Tax Authority | Secretariat of the Federal Revenue Bureau of Brazil | Tax Year 2008 to 2010
Income Tax Examination [Line Items]
Quantifying Misstatement in Current Year Financial Statements, Amount		$ (5.6)

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