Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Discontinued operation, tax effect of discontinued operation	$ 0.3	$ 0.6	$ 0.6
Deferred income tax expense (benefit), discontinued operation		0.5	$ (0.3)
Net operating loss carryforwards	37.2
Net operating loss carryforward expiring in 2020	$ 0.1
Net operating loss carryforwards expiration year	2017
Net operating loss carryforwards, expiration term (at least)	6 years
Change in valuation allowance	$ 0.2
Undistributed earnings of non-U.S. subsidiaries	422.3
Recognized tax benefits	4.3	2.1
Liability for interest expense and penalties accrued	1.5	0.9
Increase in interest related to uncertain tax positions	0.6
International
Segment Reporting Information [Line Items]
Charges associated with exit taxes	$ 6.5	$ 7.7