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	9 Months Ended
Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income from discontinued operations, net of tax	$ 1.5	$ 7.8	$ 1.5	$ 8.6
Waterloo [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net sales		27.8		78.2
Loss from discontinued operations before income taxes		(17.2)		(15.6)
Income taxes		(25.0)		(24.2)
Income from discontinued operations, net of tax		$ 7.8		$ 8.6

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

9 Months Ended

Sep. 30, 2016

Sep. 30, 2015

Sep. 30, 2016

Sep. 30, 2015

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

Income from discontinued operations, net of tax

$ 1.5

$ 7.8

$ 1.5

$ 8.6

Waterloo [Member]

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

Net sales

27.8

78.2

Loss from discontinued operations before income taxes

(17.2)

(15.6)

Income taxes

(25.0)

(24.2)

Income from discontinued operations, net of tax

$ 7.8

$ 8.6

- 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.

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- 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