Discontinued Operations - Summary of Operating Results and Summary of Major Classes of Assets and Liabilities Reflected as Discontinued Operations on Consolidated Comprehensive Income and Balance Sheet (Detail) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2015	Jun. 30, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income from discontinued operations, net of tax	$ 1.4	$ 0.8
Waterloo [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net sales	27.5	50.4
Income from discontinued operations before income taxes	2.4	1.6
Income taxes	1.0	0.8
Income from discontinued operations, net of tax	$ 1.4	$ 0.8

Discontinued Operations - Summary of Operating Results and Summary of Major Classes of Assets and Liabilities Reflected as Discontinued Operations on Consolidated Comprehensive Income and Balance Sheet (Detail) - USD ($)
$ in Millions

3 Months Ended

6 Months Ended

Jun. 30, 2015

Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]

Income from discontinued operations, net of tax

$ 1.4

$ 0.8

Waterloo [Member]

Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]

Net sales

27.5

50.4

Income from discontinued operations before income taxes

2.4

1.6

Income taxes

1.0

0.8

Income from discontinued operations, net of tax

$ 1.4

$ 0.8

- Definition

Amount before tax of income (loss) from a discontinued operation. Includes, but is not limited to, the income (loss) from operations during the phase-out period, gain (loss) on disposal, gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and adjustments to a prior period gain (loss) on disposal.

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- Definition

Amount of tax expense (benefit) related to a discontinued operation. Includes, but is not limited to, tax expense (benefit) related to income (loss) from operations during the phase-out period, tax expense (benefit) related to gain (loss) on disposal, tax expense (benefit) related to gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and tax expense (benefit) related to adjustments of a prior period gain (loss) on disposal.

+ References + Details

- Definition

Amount after tax of income (loss) from a discontinued operation including the portion attributable to the noncontrolling interest. Includes, but is not limited to, the income (loss) from operations during the phase-out period, gain (loss) on disposal, gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and adjustments to a prior period gain (loss) on disposal.

+ References + Details