Schedule of Purchase Price Allocation for Acquisitions (Detail) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Business Acquisition [Line Items]
Goodwill	$ 1,435.0	$ 1,436.4
U.S. Print and Related Services
Business Acquisition [Line Items]
Goodwill	1,306.9	1,309.3
Less: fair value of contingent consideration	2.9
Presort, Meisel, XPO and Edgar Online Acquisitions | U.S. Print and Related Services
Business Acquisition [Line Items]
Accounts receivable		18.3
Inventories		2.0
Prepaid expenses and other current assets		4.3
Property, plant and equipment		10.4
Amortizable other intangible assets		37.5
Other noncurrent assets		15.1
Goodwill		55.6
Accounts payable and accrued liabilities		(21.5)
Other noncurrent liabilities		(0.1)
Deferred taxes-net		10.4
Total purchase price-net of cash acquired		132.0
Less: debt assumed		1.4
Less: fair value of contingent consideration		3.5
Net cash paid		$ 127.1