Merger Transaction and Integration Costs (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Business Acquisition [Line Items]
Merger integration costs (less than $1 million for Q1 2013)	$ 18	$ 1
Accumulated merger transaction costs	42
Merger transaction costs	0	10
Total merger related costs	18	10
Dex One
Business Acquisition [Line Items]
Deferred financing costs	8
General and Administrative Expense
Business Acquisition [Line Items]
Merger transaction costs		10
Employee Severance
Business Acquisition [Line Items]
Merger integration costs (less than $1 million for Q1 2013)	$ 10