Schedule of Finite-Lived Intangible Assets (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Amortization Expense:
Amortization Expense	$ 87,400,000	$ 45,500,000	$ 174,700,000	$ 83,700,000
Intangible Assets:
Gross intangible assets carrying value	2,530,500,000		2,530,500,000
Accumulated amortization	(523,128,000)		(523,128,000)
Net intangible assets	2,007,372,000		2,007,372,000		2,182,092,000
Directory Service Agreements
Intangible Assets:
Gross intangible assets carrying value	1,330,000,000		1,330,000,000
Accumulated amortization	(264,765,000)		(264,765,000)
Net intangible assets	1,065,235,000		1,065,235,000
Local Customer Relationships
Intangible Assets:
Gross intangible assets carrying value	560,000,000		560,000,000
Accumulated amortization	(134,529,000)		(134,529,000)
Net intangible assets	425,471,000		425,471,000
National Customer Relationships
Intangible Assets:
Gross intangible assets carrying value	175,000,000		175,000,000
Accumulated amortization	(33,794,000)		(33,794,000)
Net intangible assets	141,206,000		141,206,000
Trade Names and Trademarks
Intangible Assets:
Gross intangible assets carrying value	380,000,000		380,000,000
Accumulated amortization	(63,930,000)		(63,930,000)
Net intangible assets	316,070,000		316,070,000
Technology, Advertising Commitments & Other
Intangible Assets:
Gross intangible assets carrying value	85,500,000		85,500,000
Accumulated amortization	(26,110,000)		(26,110,000)
Net intangible assets	$ 59,390,000		$ 59,390,000