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Income Taxes - Additional Information (Detail) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Dec. 31, 2016
Income Tax Disclosure [Abstract]          
Earnings of foreign entities $ 16.7 $ 20.7 $ 25.4 $ 27.6  
Effective tax rates, percentage 41.00% 52.00% 44.00% 21.00%  
Increase (decrease) in valuation allowance of deferred tax assets   $ (10.1)   $ (10.1)  
Unrecognized tax benefit for uncertain tax positions $ 24.7   $ 24.7   $ 24.3
Accrued interest and penalties related to income tax liabilities 1.5   1.5   $ 1.9
Decrease in unrecognized tax benefits due to expiration of statutes of limitations and settlement of various audits $ 1.4   $ 1.4