Business and Basis of Presentation Agreement and Plan of Merger (Details) (Newdex, Inc., USD $) In Millions, except Share data, unless otherwise specified	Sep. 30, 2012
Dex One
Merger Disclosures [Line Items]
Merger, Reverse Stock Split of Acquiree Common Stock, Numerator	1
Merger, Reverse Stock Split of Acquiree CommonStock, Denominator	5
Merger, Number of Shares of Acquiree Common Stock to be Converted to Acquirer Common Stock	0.2
Merger, Par or Stated Value of Acquiree Common Stock to be Converted to Acquirer Common Stock	$ 0.001
Merger, Percentage of Common Stock Held by Acquiree Shareholders Subsequent to Merger	60.00%
Merger, Percentage of Lenders Approval Needed for Completion of Merger	100.00%
Merger, Expense Reimbursement Required if Merger Agreement is Terminated	$ 7.5
Super Media, Inc.
Merger Disclosures [Line Items]
Merger, Number of Shares of Acquiree Common Stock to be Converted to Acquirer Common Stock	0.4386
Merger, Percentage of Common Stock Held by Acquiree Shareholders Subsequent to Merger	40.00%