Merger Transaction and Integration Costs (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Business Acquisition [Line Items]
Accumulated merger transaction costs	$ 42
Merger transaction costs	22	12
Merger integration costs	54	0
Total merger related costs	76	12
General and Administrative Expense
Business Acquisition [Line Items]
Merger transaction costs	22	12
Employee Severance
Business Acquisition [Line Items]
Merger integration costs	32
Dex One
Business Acquisition [Line Items]
Deferred financing costs	$ 8