Subsequent Event - Summary of Discontinued Operation on Assets and Liabilities of Business (Detail) - Disposition by Sale - Business Services - Print Logistics $ in Millions	Jun. 30, 2018 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash and cash equivalents	$ 5.2
Accounts receivable	35.3
Prepaid expenses and other current assets	1.7
Goodwill	32.4	[1]
Other noncurrent assets	5.9	[2]
Current assets held for sale	80.5
Accounts payable	29.3
Accrued liabilities	6.5
Other noncurrent liabilities	0.7
Current liabilities held for sale	$ 36.5

[1] Includes $100.9 million of goodwill, offset by $68.5 million of accumulated goodwill impairment losses.

[2] Includes net property, plant and equipment, net other intangible assets and other noncurrent assets.