Fair Value, Valuation Techniques and Related Unobservable Inputs (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Acquired Finite Lived Intangible Assets [Line Items]
Fair Value		$ 37.5
Customer Relationships
Acquired Finite Lived Intangible Assets [Line Items]
Fair Value		31.4
Customer Relationships | Fair Value, Inputs, Level 3
Acquired Finite Lived Intangible Assets [Line Items]
Fair Value		3.1
Valuation Technique	With and without method	Excess earnings
Discount rate	16.00%
Customer Relationships | Fair Value, Inputs, Level 3 | Minimum
Acquired Finite Lived Intangible Assets [Line Items]
Discount rate		12.50%
Attrition rate		2.00%
Customer Relationships | Fair Value, Inputs, Level 3 | Maximum
Acquired Finite Lived Intangible Assets [Line Items]
Discount rate		15.00%
Attrition rate		15.90%
Trade Names
Acquired Finite Lived Intangible Assets [Line Items]
Fair Value		3.5
Presort, Meisel, XPO and EDGAR Online Acquisitions
Acquired Finite Lived Intangible Assets [Line Items]
Contingent consideration		3.5
Presort, Meisel, XPO and EDGAR Online Acquisitions | Fair Value, Inputs, Level 3 | Fair Value, Measurements, Nonrecurring | Contingent Consideration
Acquired Finite Lived Intangible Assets [Line Items]
Contingent consideration		3.5
Valuation Technique		Probability weighted discounted future cash flows
Discount rate		4.50%
Presort, Meisel, XPO and EDGAR Online Acquisitions | Customer Relationships | Fair Value, Inputs, Level 3 | Fair Value, Measurements, Nonrecurring
Acquired Finite Lived Intangible Assets [Line Items]
Fair Value		31.4
Valuation Technique		Excess earnings, with and without method
Presort, Meisel, XPO and EDGAR Online Acquisitions | Customer Relationships | Fair Value, Inputs, Level 3 | Fair Value, Measurements, Nonrecurring | Minimum
Acquired Finite Lived Intangible Assets [Line Items]
Discount rate		16.00%
Attrition rate		7.00%
Presort, Meisel, XPO and EDGAR Online Acquisitions | Customer Relationships | Fair Value, Inputs, Level 3 | Fair Value, Measurements, Nonrecurring | Maximum
Acquired Finite Lived Intangible Assets [Line Items]
Discount rate		17.00%
Attrition rate		20.00%
Presort, Meisel, XPO and EDGAR Online Acquisitions | Technology | Fair Value, Inputs, Level 3 | Fair Value, Measurements, Nonrecurring
Acquired Finite Lived Intangible Assets [Line Items]
Fair Value		14.5
Valuation Technique		Excess earnings, relief-from-royalty method, cost approach
Royalty rate (after-tax)		4.50%
Presort, Meisel, XPO and EDGAR Online Acquisitions | Technology | Fair Value, Inputs, Level 3 | Fair Value, Measurements, Nonrecurring | Minimum
Acquired Finite Lived Intangible Assets [Line Items]
Discount rate		16.00%
Obsolescence factor		10.00%
Presort, Meisel, XPO and EDGAR Online Acquisitions | Technology | Fair Value, Inputs, Level 3 | Fair Value, Measurements, Nonrecurring | Maximum
Acquired Finite Lived Intangible Assets [Line Items]
Discount rate		17.00%
Obsolescence factor		20.00%
Presort, Meisel, XPO and EDGAR Online Acquisitions | Trade Names | Fair Value, Inputs, Level 3 | Fair Value, Measurements, Nonrecurring
Acquired Finite Lived Intangible Assets [Line Items]
Fair Value		3.5
Valuation Technique		Relief-from-royalty method
Presort, Meisel, XPO and EDGAR Online Acquisitions | Trade Names | Fair Value, Inputs, Level 3 | Fair Value, Measurements, Nonrecurring | Minimum
Acquired Finite Lived Intangible Assets [Line Items]
Discount rate		15.50%
Royalty rate (after-tax)		0.30%
Presort, Meisel, XPO and EDGAR Online Acquisitions | Trade Names | Fair Value, Inputs, Level 3 | Fair Value, Measurements, Nonrecurring | Maximum
Acquired Finite Lived Intangible Assets [Line Items]
Discount rate		17.00%
Royalty rate (after-tax)		1.20%
Presort, Meisel, XPO and EDGAR Online Acquisitions | Noncompete Agreements | Fair Value, Inputs, Level 3 | Fair Value, Measurements, Nonrecurring
Acquired Finite Lived Intangible Assets [Line Items]
Fair Value		$ 2.6
Valuation Technique		Excess earnings, with and without method
Presort, Meisel, XPO and EDGAR Online Acquisitions | Noncompete Agreements | Fair Value, Inputs, Level 3 | Fair Value, Measurements, Nonrecurring | Minimum
Acquired Finite Lived Intangible Assets [Line Items]
Discount rate		16.00%
Presort, Meisel, XPO and EDGAR Online Acquisitions | Noncompete Agreements | Fair Value, Inputs, Level 3 | Fair Value, Measurements, Nonrecurring | Maximum
Acquired Finite Lived Intangible Assets [Line Items]
Discount rate		17.00%