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Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2015	Mar. 31, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Income Tax Contingency [Line Items]
Effective income tax rate	34.60%		30.70%	46.00%
Effective income tax rate reconciliation, excluding European Segment reorganization costs (percent)				33.40%	32.90%
U.S. federal income tax rate	35.00%		35.00%	35.00%
Unrecognized tax benefits	$ 14.8			$ 14.8
Recognized tax benefits	5.2			5.2
Accrued interest and penalties related to uncertain tax positions	$ 1.1			$ 1.1
European Segment
Income Tax Contingency [Line Items]
Exit taxes related to European reorganization		$ 7.6

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Recognized Tax Benefits

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns.

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Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

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