Acquisitions and Dispositions - Schedule of Purchase Price Allocation for Acquisitions (Detail) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Dec. 31, 2013
Business Acquisition [Line Items]
Goodwill	$ 1,729.1	$ 1,436.3
Less: gain on bargain purchase	9.5
Esselte Multi Corpora And Consolidated Graphics Acquisition
Business Acquisition [Line Items]
Accounts receivable	241.4
Inventories	89.6
Prepaid expenses and other current assets	17.3
Property, plant and equipment	334.1
Other intangible assets	205.0
Other noncurrent assets	11.9
Goodwill	300.1
Accounts payable and accrued liabilities	(218.0)
Other noncurrent liabilities	(57.5)
Deferred taxes-net	(96.6)
Total purchase price-net of cash acquired	827.3
Less: debt assumed	118.4
Less: value of common stock issued	319.0
Less: gain on bargain purchase	9.5
Net cash paid	$ 380.4