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Segment Data (Schedule Of Operating Segment Results) (Detail) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Revenue	$ 1,717,579,000	$ 1,579,514,000	$ 1,599,859,000	$ 1,344,564,000	$ 1,715,797,000	$ 1,630,034,000	$ 1,630,154,000	$ 1,342,548,000	$ 6,241,516,000	$ 6,318,533,000	$ 6,243,044,000
Direct operating expenses	651,719,000	627,842,000	615,265,000	578,519,000	651,589,000	648,766,000	645,915,000	599,178,000	2,473,345,000	2,545,448,000	2,567,210,000
Selling, general and administrative expenses	432,237,000	428,967,000	424,163,000	416,188,000	418,194,000	426,902,000	417,883,000	413,146,000	1,701,555,000	1,676,125,000	1,636,738,000
Depreciation and amortization	168,824,000	166,320,000	168,394,000	170,453,000	186,100,000	175,865,000	174,062,000	174,871,000	673,991,000	710,898,000	730,828,000
Impairment charges	0	21,631,000	0	0	19,239,000	35,000	4,902,000	0	21,631,000	24,176,000	16,970,000
Corporate expenses	83,142,000	74,542,000	80,592,000	77,288,000	87,227,000	78,202,000	82,197,000	72,705,000	315,564,000	320,331,000	313,514,000
Other operating income, net	(4,693,000)	6,914,000	100,754,000	(8,974,000)	(5,678,000)	47,172,000	(1,628,000)	165,000	94,001,000	40,031,000	22,998,000
Operating income (loss)	376,964,000	$ 267,126,000	$ 412,199,000	$ 93,142,000	347,770,000	$ 347,436,000	$ 303,567,000	$ 82,813,000	1,149,431,000	1,081,586,000	1,000,782,000
Segment assets	13,821,098,000				14,002,449,000				13,821,098,000	14,002,449,000	15,045,335,000
Capital expenditures									296,380,000	318,164,000	324,526,000
Share-based compensation expense									10,923,000	10,713,000	16,715,000
Intersegment [Member]
Segment Reporting Information [Line Items]
Revenue									13,304,000	16,905,000
iHM [Member]
Segment Reporting Information [Line Items]
Revenue									3,284,320,000	3,161,503,000	3,131,595,000
Direct operating expenses									972,937,000	932,172,000	955,767,000
Selling, general and administrative expenses									1,065,716,000	1,014,432,000	982,514,000
Depreciation and amortization									240,230,000	240,868,000	262,136,000
Impairment charges									0	0	0
Corporate expenses									0	0	0
Other operating income, net									0	0	0
Operating income (loss)									1,005,437,000	974,031,000	931,178,000
Segment assets	7,534,972,000				7,720,181,000				7,534,972,000	7,720,181,000	7,933,564,000
Capital expenditures									59,007,000	50,403,000	75,742,000
Share-based compensation expense									0	0	0
iHM [Member] \| Intersegment [Member]
Segment Reporting Information [Line Items]
Revenue									0	10,000	0
Americas Outdoor Advertising [Member]
Segment Reporting Information [Line Items]
Revenue									1,349,021,000	1,350,623,000	1,385,757,000
Direct operating expenses									597,382,000	605,771,000	610,750,000
Selling, general and administrative expenses									233,254,000	233,641,000	243,456,000
Depreciation and amortization									204,514,000	203,928,000	206,031,000
Impairment charges									0	0	0
Corporate expenses									0	0	0
Other operating income, net									0	0	0
Operating income (loss)									313,871,000	307,283,000	325,520,000
Segment assets	3,567,764,000				3,664,574,000				3,567,764,000	3,664,574,000	3,823,347,000
Capital expenditures									82,165,000	109,727,000	96,590,000
Share-based compensation expense									0	0	0
Americas Outdoor Advertising [Member] \| Intersegment [Member]
Segment Reporting Information [Line Items]
Revenue									2,744,000	3,436,000	2,473,000
International Outdoor Advertising [Member]
Segment Reporting Information [Line Items]
Revenue									1,457,183,000	1,610,636,000	1,560,433,000
Direct operating expenses									897,520,000	991,117,000	983,978,000
Selling, general and administrative expenses									298,250,000	314,878,000	300,116,000
Depreciation and amortization									166,060,000	198,143,000	194,493,000
Impairment charges									0	0	0
Corporate expenses									0	0	0
Other operating income, net									0	0	0
Operating income (loss)									95,353,000	106,498,000	81,846,000
Segment assets	1,581,710,000				1,680,598,000				1,581,710,000	1,680,598,000	1,899,648,000
Capital expenditures									132,554,000	117,480,000	100,949,000
Share-based compensation expense									0	0	0
International Outdoor Advertising [Member] \| Intersegment [Member]
Segment Reporting Information [Line Items]
Revenue									0	0	0
Other [Member]
Segment Reporting Information [Line Items]
Revenue									164,296,000	212,676,000	181,993,000
Direct operating expenses									12,619,000	24,009,000	25,271,000
Selling, general and administrative expenses									110,526,000	122,448,000	118,830,000
Depreciation and amortization									26,386,000	33,543,000	39,291,000
Impairment charges									0	0	0
Corporate expenses									0	0	0
Other operating income, net									0	0	0
Operating income (loss)									14,765,000	32,676,000	(1,399,000)
Segment assets	238,599,000				277,388,000				238,599,000	277,388,000	534,363,000
Capital expenditures									6,846,000	5,744,000	9,933,000
Share-based compensation expense									0	0	0
Other [Member] \| Intersegment [Member]
Segment Reporting Information [Line Items]
Revenue									10,560,000	13,459,000	14,261,000
Corporate and other reconciling items [Member]
Segment Reporting Information [Line Items]
Revenue									0	0	0
Direct operating expenses									0	0	0
Selling, general and administrative expenses									0	0	0
Depreciation and amortization									36,801,000	34,416,000	28,877,000
Impairment charges									21,631,000	24,176,000	16,970,000
Corporate expenses									315,564,000	320,341,000	313,514,000
Other operating income, net									94,001,000	40,031,000	22,998,000
Operating income (loss)									(279,995,000)	(338,902,000)	(336,363,000)
Segment assets	1,094,345,000				659,708,000				1,094,345,000	659,708,000	854,413,000
Capital expenditures									15,808,000	34,810,000	41,312,000
Share-based compensation expense									10,923,000	10,713,000	16,715,000
Corporate and other reconciling items [Member] \| Intersegment [Member]
Segment Reporting Information [Line Items]
Revenue									0	0	0
Eliminations [Member]
Segment Reporting Information [Line Items]
Revenue									(13,304,000)	(16,905,000)	(16,734,000)
Direct operating expenses									(7,113,000)	(7,621,000)	(8,556,000)
Selling, general and administrative expenses									(6,191,000)	(9,274,000)	(8,178,000)
Depreciation and amortization									0	0	0
Impairment charges									0	0	0
Corporate expenses									0	(10,000)	0
Other operating income, net									0	0	0
Operating income (loss)									0	0	0
Segment assets	$ (196,292,000)				$ 0				(196,292,000)	0	0
Capital expenditures									0	0	0
Share-based compensation expense									0	0	0
Eliminations [Member] \| Intersegment [Member]
Segment Reporting Information [Line Items]
Revenue									$ 0	$ 0	$ 0