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Income Taxes - Additional Information (Detail) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Spanish tax settlement        
Income Taxes [Line Items]        
Effective tax rate 22.00% 20.80% 20.40% 22.70%
Foreign Tax Authority        
Income Taxes [Line Items]        
Provision for uncertain tax positions $ 28.2   $ 28.2  
2007-2012 | Minimum        
Income Taxes [Line Items]        
Income tax examination, years under examination     2007  
2007-2012 | Maximum        
Income Taxes [Line Items]        
Income tax examination, years under examination     2016  
Other Liabilities        
Income Taxes [Line Items]        
Unrecognized tax benefits that would impact effective tax rate 18.9   $ 18.9  
Accrued interest and penalties 1.7   1.7  
Other Current Liabilities        
Income Taxes [Line Items]        
Unrecognized tax benefits that would impact effective tax rate 6.9   6.9  
Accrued interest and penalties $ 0.7   $ 0.7