Property, Plant And Equipment, Intangible Assets And Goodwill (Schedule Of Definite-Lived Intangible Assets) (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 3,007,986	$ 3,056,369
Accumulated Amortization	(1,981,618)	(1,849,642)
Transit, street furniture and other outdoor contractual rights [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	663,303	716,723
Accumulated Amortization	(465,834)	(476,523)
Customer/advertiser relationships [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,222,519	1,222,518
Accumulated Amortization	(861,346)	(765,596)
Talent contracts [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	319,384	319,384
Accumulated Amortization	(245,378)	(223,936)
Representation contracts [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	242,413	238,313
Accumulated Amortization	(218,940)	(206,338)
Permanent easements [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	171,825	171,271
Accumulated Amortization	0	0
Other [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	388,542	388,160
Accumulated Amortization	$ (190,120)	$ (177,249)