Acquisitions and Dispositions - Schedule of Purchase Price Allocation for Acquisitions (Detail) - USD ($) $ in Millions	6 Months Ended		12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014	Jun. 08, 2015
Business Acquisition [Line Items]
Goodwill	$ 1,758.2		$ 1,706.6
Less: gain on bargain purchase	0.0	$ 10.5
Courier Corporation
Business Acquisition [Line Items]
Accounts receivable	34.1
Inventories	59.0
Prepaid expenses and other current assets	38.7
Property, plant and equipment	162.2
Other intangible assets	106.5
Other noncurrent assets	7.9
Goodwill	58.3
Accounts payable and accrued liabilities	(21.4)
Other noncurrent liabilities	(10.5)
Deferred taxes—net	(83.6)
Total purchase price-net of cash acquired	351.2
Less: debt assumed	78.9			$ 78.2
Less: value of common stock issued	154.2
Net cash paid	$ 118.1
Consolidated Graphics, Esselte and MultiCorpora
Business Acquisition [Line Items]
Accounts receivable			242.0
Inventories			89.6
Prepaid expenses and other current assets			17.5
Property, plant and equipment			337.0
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			828.0
Less: debt assumed			118.4
Less: value of common stock issued			319.0
Less: gain on bargain purchase			9.5
Net cash paid			$ 381.1