Schedule of Finite-Lived Intangible Assets (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011
Amortization Expense:
Amortization Expense	$ 87,400,000	$ 50,500,000	$ 262,100,000	$ 134,200,000
Intangible Assets:
Gross intangible assets carrying value	2,530,500,000		2,530,500,000
Accumulated amortization	(610,487,000)		(610,487,000)
Net intangible assets	1,920,013,000		1,920,013,000		2,182,092,000
Directory Service Agreements
Intangible Assets:
Gross intangible assets carrying value	1,330,000,000		1,330,000,000
Accumulated amortization	(313,815,000)		(313,815,000)
Net intangible assets	1,016,185,000		1,016,185,000
Local Customer Relationships
Intangible Assets:
Gross intangible assets carrying value	560,000,000		560,000,000
Accumulated amortization	(152,638,000)		(152,638,000)
Net intangible assets	407,362,000		407,362,000
National Customer Relationships
Intangible Assets:
Gross intangible assets carrying value	175,000,000		175,000,000
Accumulated amortization	(39,940,000)		(39,940,000)
Net intangible assets	135,060,000		135,060,000
Trade Names and Trademarks
Intangible Assets:
Gross intangible assets carrying value	380,000,000		380,000,000
Accumulated amortization	(74,219,000)		(74,219,000)
Net intangible assets	305,781,000		305,781,000
Technology, Advertising Commitments & Other
Intangible Assets:
Gross intangible assets carrying value	85,500,000		85,500,000
Accumulated amortization	(29,875,000)		(29,875,000)
Net intangible assets	$ 55,625,000		$ 55,625,000