Acquisitions and Dispositions - Fair Value, Valuation Techniques and Related Unobservable Inputs (Detail) (Consolidated Graphics, Esselte and MultiCorpora, Fair Value, Inputs, Level 3, Fair Value, Measurements, Nonrecurring, USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015
Customer Relationships
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Fair Value	$ 178.2
Valuation Technique	Excess earnings
Customer Relationships | Minimum
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Discount rate	17.00%
Attrition rate	5.00%
Customer Relationships | Maximum
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Discount rate	21.00%
Attrition rate	9.50%
Trade Names
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Fair Value	26.5
Valuation Technique	Relief-from-royalty method
Discount rate	19.00%
Trade Names | Minimum
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Royalty rate (after-tax)	0.50%
Trade Names | Maximum
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Royalty rate (after-tax)	1.50%
Technology
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Fair Value	$ 1.1
Valuation Technique	Excess earnings
Discount rate	17.00%