Acquisitions and Dispositions - Schedule of Purchase Price Allocation for Acquisitions (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Business Acquisition [Line Items]
Goodwill	$ 1,706.6	$ 1,436.3	$ 1,436.4
Less: gain on bargain purchase	9.5
Consolidated Graphics, Esselte and MultiCorpora
Business Acquisition [Line Items]
Accounts receivable	241.9
Inventories	89.6
Prepaid expenses and other current assets	17.5
Property, plant and equipment	336.8
Other intangible assets	205.0
Other noncurrent assets	11.9
Goodwill	300.1
Accounts payable and accrued liabilities	(221.0)
Other noncurrent liabilities	(57.5)
Deferred taxes-net	(96.6)
Total purchase price-net of cash acquired	827.7
Less: debt assumed	118.4
Less: value of common stock issued	319.0
Less: gain on bargain purchase	9.5
Net cash paid	380.8
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
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