Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Earnings of foreign entities	$ 8.7	$ 6.9
Effective tax rates, percentage	72.00%	29.00%
Increase (decrease) in valuation allowance of deferred tax assets		$ (10.1)
Unrecognized tax benefit for uncertain tax positions	$ 24.5		$ 24.3
Accrued interest and penalties related to income tax liabilities	1.8		$ 1.9
Decrease in unrecognized tax benefits due to expiration of statutes of limitations and settlement of various audits	$ 1.6