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Income Taxes - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 12 Months Ended
Dec. 31, 2013
Jun. 30, 2013
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Income Tax [Line Items]            
Deferred Tax Assets, Net, Current $ 12.4   $ 12.4 $ (10.6)    
Release of valuation allowance   102.4        
Accumulated undistributed earnings of certain foreign subsidiaries 59.2   59.2 87.8    
Previously undistributed earnings of foreign subsidiaries to be repatriated in the future 24.3   24.3      
Deferred tax liabilities related to previously undistributed earnings of foreign subsidiaries to be repatriated in the future 9.9   9.9      
Deferred tax asset, federal net operating loss carryforwards 7.5   7.5 20.9    
Deferred tax asset, state net operating loss carryforwards 7.7   7.7 2.2    
Deferred tax asset, foreign net operating loss carryforwards 5.2   5.2 8.2    
Deferred tax asset, capital loss carryforwards       12.8    
Deferred Tax Assets, Tax Credit Carryforwards, Alternative Motor Vehicle Credits 0.2   0.2      
Deferred tax asset, U.S. research tax credit carryforwards 7.9   7.9 6.3    
Deferred tax asset, U.S. foreign tax credits carryforwards 31.0   31.0 21.1    
Deferred tax asset, U.S. alternative minimum tax credits carryforwards 3.3   3.3 3.3    
Deferred tax asset, valuation allowance 9.8 10.4 9.8 131.8    
Total deferred tax assets 118.8   118.8 16.9    
Income taxes paid     4.0 2.9 4.2  
Unrecognized tax benefits 4.8   4.8 4.0 4.3 3.8
Unrecognized tax benefits that, if recognized, would impact our annual effective tax rate 4.8   4.8      
Unrecognized tax benefits that, interests 0.1   0.1      
Unrecognized tax benefits decrease due to potential expiration of statute of limitations and settlements with tax authorities     2.3      
Effective Income Tax Rate Reconciliation, Prior Year Income Taxes, Amount     (3.4)      
Decrease in valuation allowance 6.7          
Income tax (benefit) expense     (107.2) 3.9 3.5  
Capital Loss Carryforward
            
Income Tax [Line Items]            
Deferred tax asset, valuation allowance       12.8    
Capital Loss Carryforward | Minimum
            
Income Tax [Line Items]            
Deferred tax asset, tax credit carryforwards expiration year       2013    
Deferred Tax Asset Operating Loss Carryforwards State and Local
            
Income Tax [Line Items]            
Deferred tax asset, valuation allowance       2.2    
Deferred Tax Asset Operating Loss Carryforwards Foreign
            
Income Tax [Line Items]            
Deferred tax asset, valuation allowance       8.3    
Deferred Tax Asset Operating Loss Carryforwards Domestic
            
Income Tax [Line Items]            
Deferred tax asset, valuation allowance       108.5    
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Income Tax [Line Items]            
Deferred tax asset, tax credit carryforwards expiration year     2019 2022    
Internal Revenue Service (IRS)
            
Income Tax [Line Items]            
Deferred tax asset, net operating loss carryforwards expiration year     2026 2018    
State and Local Jurisdiction
            
Income Tax [Line Items]            
Deferred tax asset, net operating loss carryforwards expiration year     2014 2019    
Operating Loss Carryforwards 4.7   4.7      
Foreign Tax Authority
            
Income Tax [Line Items]            
Deferred tax asset, net operating loss carryforwards expiration year       2030    
Deferred tax asset, net operating loss carryforwards that has an indefinite life 0.4   0.4 0.5    
Deferred tax asset, net operating loss carryforwards subject to expiration       7.7    
Deferred tax asset, tax credit carryforwards expiration year     2015 2015    
Operating Loss Carryforwards 5.1   5.1      
Foreign Tax Authority | United Kingdom
            
Income Tax [Line Items]            
Income tax (benefit) expense     0.8      
Foreign Tax Authority | Finland
            
Income Tax [Line Items]            
Income tax (benefit) expense     $ (0.8)