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Income Taxes (Narrative) (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2021
Mar. 31, 2021
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Mar. 31, 2019
Mar. 31, 2018
Jun. 30, 2021
Jun. 30, 2020
Dec. 31, 2012
Income Tax Examination [Line Items]                    
Income tax expense (benefit) $ 1.7     $ 3.8       $ (4.2) $ 6.9  
Income before income tax $ 50.3     $ 9.2       $ 24.0 $ 20.3  
Effective rate (percent) 3.40%     41.30%       (17.50%) 34.00%  
Net income $ 48.6 $ (20.4)   $ 5.4 $ 8.0     $ 28.2 $ 13.4  
Domestic Tax Authority | Internal Revenue Service (IRS) | Earliest Tax Year                    
Income Tax Examination [Line Items]                    
Open tax year               2017    
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               2016    
Foreign Tax Authority | Secretariat of the Federal Revenue Bureau of Brazil                    
Income Tax Examination [Line Items]                    
Income tax expense (benefit) $ 3.1                  
Income tax examination, interest expense               $ 0.2 $ 0.2  
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 | Earliest Tax Year                    
Income Tax Examination [Line Items]                    
Open tax year               2015    
Foreign Tax Authority | Secretariat of the Federal Revenue Bureau of Brazil | Tax Year 2008 to 2010                    
Income Tax Examination [Line Items]                    
Additional reserve from a prior period     $ 1.2     $ 5.6        
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
Potential tax adjustment related to related to acquisition purchase price                   $ 43.3
Foreign Tax Authority | Secretariat of the Federal Revenue Bureau of Brazil | Tax Year 2007 | Maximum                    
Income Tax Examination [Line Items]                    
Penalty rate 150.00%             150.00%    
Foreign Tax Authority | Secretariat of the Federal Revenue Bureau of Brazil | Tax Year 2011                    
Income Tax Examination [Line Items]                    
Reversal of income tax accrued for a prior year             $ 5.6      
Foreign Tax Authority | Canada Revenue Agency | Earliest Tax Year                    
Income Tax Examination [Line Items]                    
Open tax year               2017    
Foreign Tax Authority | Federal Ministry of Finance, Germany | Earliest Tax Year                    
Income Tax Examination [Line Items]                    
Open tax year               2016    
Foreign Tax Authority | Swedish Tax Agency (Skatteverket) | Earliest Tax Year                    
Income Tax Examination [Line Items]                    
Open tax year               2016    
Foreign Tax Authority | Her Majesty's Revenue and Customs (HMRC) | Earliest Tax Year                    
Income Tax Examination [Line Items]                    
Open tax year               2018    
State and Local Jurisdiction | Minimum                    
Income Tax Examination [Line Items]                    
Statutes of limitation, period               2 years    
Other Noncurrent Liabilities | Foreign Tax Authority | Secretariat of the Federal Revenue Bureau of Brazil | Tax Year 2007 to 2010                    
Income Tax Examination [Line Items]                    
Unrecognized tax benefits $ 30.0             $ 30.0