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Income Taxes - Additional Information (Detail)
CAD in Millions, $ in Millions
 3 Months Ended 12 Months Ended
Jun. 30, 2015
USD ($)
Dec. 31, 2016
USD ($)
Sep. 30, 2016
USD ($)
Jun. 30, 2016
USD ($)
Dec. 31, 2015
USD ($)
Sep. 30, 2015
USD ($)
Jun. 30, 2015
USD ($)
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Dec. 31, 2016
CAD
Income Tax [Line Items]                      
U.S. Federal statutory income tax rate               35.00%      
Valuation allowance               $ (2.2) $ 159.0    
Increase (decrease) in non-cash deferred income tax asset valuation allowance               6.7 9.8    
Aggregate letter of credit outstanding amount | CAD                     CAD 7.9
Income taxes   $ 5.0     $ 5.7     5.0 5.7    
Amount of interest and penalties   2.5     2.3     2.5 2.3 $ 2.8  
Benefits if uncertain tax position recognized   10.6     7.8     10.6 $ 7.8 8.8  
Decrease in unrecognized tax benefits excluding interest related to certain adjustments   6.3           $ 6.3      
US-Canada APA                      
Income Tax [Line Items]                      
U.S.-Canada Advance Pricing Agreement, description               Tax authorities are examining certain of our U.S. and non-U.S. tax returns and have or may propose tax deficiencies, including penalties and interest. Because of the inherent uncertainties involved in settlement initiatives and court and tax proceedings, we cannot guarantee that these tax matters will be resolved in our favor, and therefore our potential exposure, if any, is also uncertain.  In 2011 and 2012 we received notices of re-assessment from the Canadian federal and provincial tax authorities related to the years 2002 through 2004. We objected to the re-assessments and believed the position was without merit. Accordingly, we appealed the re-assessments and in connection with such appeal we were required to post letters of credit aggregating Cdn. $7.9 million. In 2014, the Appeals Division of the Canadian Revenue Authority ruled in our favor and reversed in their entirety such notices of re-assessment. As a result, we recognized a non-cash income tax benefit of $3.0 million related to the release of a portion of our reserve for uncertain tax positions in 2014 related to the completion of this Canadian income tax audit. In addition, the related letters of credit have been cancelled.  Also during 2014, we recognized a non-cash income tax benefit of $3.1 million related to the release of a portion of our reserve for uncertain tax positions in conjunction with the completion of an audit of our U.S. income tax return for 2009.  As a result of ongoing audits in certain jurisdictions, in 2008 we filed Advance Pricing Agreement Requests with the tax authorities in the U.S., Canada and Germany. These requests have been under review with the respective tax authorities since 2008 and prior to the third quarter of 2016, it was uncertain whether an agreement would be reached between the tax authorities and whether we would agree to execute and finalize such agreements. During the third quarter of 2016, Contran, as the ultimate parent of our U.S. Consolidated income tax group, executed and finalized an Advance Pricing Agreement with the U.S. Internal Revenue Service and our Canadian subsidiary executed and finalized an Advance Pricing Agreement with the Competent Authority for Canada (collectively, the “U.S.-Canada APA”) effective for tax years 2005 – 2015.      
U.S.-Canada APA   2.2 $ (5.6)         $ (3.4)      
US-Canada APA | Canadian Subsidiary                      
Income Tax [Line Items]                      
Income tax payable   2.3           2.3     CAD 3.0
Income taxes   2.3           2.3      
Canadian Income Tax Audit                      
Income Tax [Line Items]                      
Non-cash income tax benefit recognized related to release of portion of reserve for uncertain tax positions                   3.0  
U.S. Income Tax Audit                      
Income Tax [Line Items]                      
Non-cash income tax benefit recognized related to release of portion of reserve for uncertain tax positions                   $ 3.1  
Germany and Belgian                      
Income Tax [Line Items]                      
Valuation allowance $ 150.3 (4.3) $ (0.8) $ 2.9 6.4 $ 2.3 $ 150.3        
Increase (decrease) in non-cash deferred income tax asset valuation allowance         $ 8.7 $ 8.7   (2.2)      
Corporate Purposes | Germany                      
Income Tax [Line Items]                      
Net operating loss carryforwards   638.0           638.0      
Corporate Purposes | Belgium                      
Income Tax [Line Items]                      
Net operating loss carryforwards   93.0           93.0      
Trade Tax Purposes | Germany                      
Income Tax [Line Items]                      
Net operating loss carryforwards   $ 71.0           $ 71.0      
Canada Revenue Agency | US-Canada APA | Canadian Subsidiary | Earliest Tax Year                      
Income Tax [Line Items]                      
Effective tax year               2005      
Canada Revenue Agency | US-Canada APA | Canadian Subsidiary | Latest Tax Year                      
Income Tax [Line Items]                      
Effective tax year               2015