Number of businesses disposed.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.

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This element represents the amount of revenue of the acquiree since the acquisition date included in the consolidated income statement for the reporting period.

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Amount recognized for assets, including goodwill, in excess of (less than) the aggregate liabilities assumed.

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Amount before tax of gain (loss) not previously recognized resulting from the disposal of a discontinued operation.

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Amount classified as cash and cash equivalents attributable to disposal group held for sale or disposed of.

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Amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation.

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No definition available.

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Amount of gain (loss) from sale and disposal of integrated set of activities and assets capable of being conducted and managed for purpose of providing return in form of dividend, lower cost, or other economic benefit to investor, owner, member and participant.

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The cash inflow associated with the amount received from the sale of a portion of the company's business, for example a segment, division, branch or other business, during the period.

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Dispositions and Acquisition - Narrative (Detail) $ in Millions		12 Months Ended
	Jul. 02, 2018 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2016 USD ($) Business	Aug. 04, 2016 USD ($)
Business Acquisition [Line Items]
Acquisition-related expenses			$ 2.7
Precision Dialogue Holdings, LLC
Business Acquisition [Line Items]
Purchase price, net of cash acquired				$ 59.2
Sales from acquiree operations			22.4
Earning before income taxes			1.8
Disposition by Sale \| Business Services
Business Acquisition [Line Items]
Cash on disposition of business			$ 13.7
Number of businesses disposed \| Business			5
Gain (loss) on disposition of business			$ 11.9
Disposition by Sale \| Business Services \| Print Logistics
Business Acquisition [Line Items]
Cash on disposition of business	$ 60.0
Proceeds from sale of business	43.9
Cash included in disposition	$ 4.9
Pre-tax gain resulted from disposition of business		$ 3.6