Schedule of Purchase Price Allocation for Acquisitions (Detail) (Presort, Meisel, XPO and EDGAR Online acquisitions, USD $) In Millions, unless otherwise specified	Dec. 31, 2012
Presort, Meisel, XPO and EDGAR Online acquisitions
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	55.8
Accounts payable and accrued liabilities	(21.5)
Other noncurrent liabilities	(0.1)
Deferred taxes-net	10.4
Total purchase price-net of cash acquired	132.2
Less: debt assumed	1.4
Less: fair value of contingent consideration	3.5
Net cash paid	$ 127.3