Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2014

Intangible Assets, Net (Excluding Goodwill) [Abstract]

Schedule of Finite-Lived Intangible Assets

The following table sets forth the details of the Company's intangible assets at March 31, 2014 and December 31, 2013.

	At March 31, 2014						At December 31, 2013
	Gross		Accumulated Amortization		Net		Gross		Accumulated Amortization		Net
	(in millions)
Directory services agreements	$	666	$	150	$	516	$	666	$	97	$	569
Client relationships	924		423		501		924		348		576
Trademarks and domain names	222		44		178		222		29		193
Patented technologies	42		7		35		42		4		38
Advertising commitment	11		7		4		11		6		5
Total intangible assets	$	1,865	$	631	$	1,234	$	1,865	$	484	$	1,381