Property, Plant And Equipment, Intangible Assets And Goodwill (Schedule Of Definite-Lived Intangible Assets) (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 3,008,225	$ 3,056,369
Accumulated Amortization	(1,866,744)	(1,849,642)
Transit, street furniture and other outdoor contractual rights [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	666,821	716,723
Accumulated Amortization	(445,797)	(476,523)
Customer/advertiser relationships [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,222,518	1,222,518
Accumulated Amortization	(800,930)	(765,596)
Talent contracts [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	319,384	319,384
Accumulated Amortization	(231,083)	(223,936)
Representation contracts [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	240,017	238,313
Accumulated Amortization	(211,229)	(206,338)
Permanent easements [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	171,238	171,271
Accumulated Amortization	0	0
Other [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	388,247	388,160
Accumulated Amortization	$ (177,705)	$ (177,249)