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Acquisitions and Dispositions - Fair Value, Valuation Techniques and Related Unobservable Inputs (Detail) (USD $)
In Millions, unless otherwise specified
 9 Months Ended
Sep. 30, 2014
Customer Relationships
  
Acquired Finite Lived Intangible Assets [Line Items]  
Fair Value $ 178.2
Trade Names
  
Acquired Finite Lived Intangible Assets [Line Items]  
Fair Value 17.8
Consolidated Graphics, Esselte and MultiCorpora | Customer Relationships | Fair Value, Inputs, Level 3 | Fair Value, Measurements, Nonrecurring
  
Acquired Finite Lived Intangible Assets [Line Items]  
Fair Value 178.2
Valuation Technique Excess earnings
Consolidated Graphics, Esselte and MultiCorpora | Customer Relationships | Fair Value, Inputs, Level 3 | Minimum | Fair Value, Measurements, Nonrecurring
  
Acquired Finite Lived Intangible Assets [Line Items]  
Discount rate 17.00%
Attrition rate 5.00%
Consolidated Graphics, Esselte and MultiCorpora | Customer Relationships | Fair Value, Inputs, Level 3 | Maximum | Fair Value, Measurements, Nonrecurring
  
Acquired Finite Lived Intangible Assets [Line Items]  
Discount rate 21.00%
Attrition rate 9.50%
Consolidated Graphics, Esselte and MultiCorpora | Trade Names | Fair Value, Inputs, Level 3 | Fair Value, Measurements, Nonrecurring
  
Acquired Finite Lived Intangible Assets [Line Items]  
Fair Value 26.5
Valuation Technique Relief-from-royalty method
Discount rate 19.00%
Consolidated Graphics, Esselte and MultiCorpora | Trade Names | Fair Value, Inputs, Level 3 | Minimum | Fair Value, Measurements, Nonrecurring
  
Acquired Finite Lived Intangible Assets [Line Items]  
Royalty rate (after-tax) 0.50%
Consolidated Graphics, Esselte and MultiCorpora | Trade Names | Fair Value, Inputs, Level 3 | Maximum | Fair Value, Measurements, Nonrecurring
  
Acquired Finite Lived Intangible Assets [Line Items]  
Royalty rate (after-tax) 1.50%
Consolidated Graphics, Esselte and MultiCorpora | Technology | Fair Value, Inputs, Level 3 | Fair Value, Measurements, Nonrecurring
  
Acquired Finite Lived Intangible Assets [Line Items]  
Fair Value $ 1.1
Valuation Technique Excess earnings
Discount rate 17.00%