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Property, Plant And Equipment, Intangible Assets And Goodwill (Schedule Of Changes In Carrying Amount Of Goodwill) (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Goodwill [Line Items]      
Balance $ 4,187,424 $ 4,202,187  
Impairment 0 0  
Acquisitions 10,998 18,199  
Dispositions 0 0  
Foreign currency (20,353) (33,022)  
Other 0 60  
Assets held for sale (49,182)    
Balance 4,128,887 4,187,424 $ 4,202,187
iHM [Member]      
Goodwill [Line Items]      
Balance 3,288,481 3,270,521  
Impairment   0  
Acquisitions 0 17,900  
Dispositions 0 0  
Foreign currency 0 0  
Other 0 60  
Balance 3,288,481 3,288,481 3,270,521
Americas Outdoor Advertising [Member]      
Goodwill [Line Items]      
Balance 584,574 585,227  
Impairment   0  
Acquisitions 0 0  
Dispositions 0 0  
Foreign currency (709) (653)  
Other 0 0  
Assets held for sale (49,182)    
Balance 534,683 584,574 585,227
International Outdoor Advertising [Member]      
Goodwill [Line Items]      
Balance 232,538 264,907  
Impairment 0 0 (10,700)
Acquisitions 10,998 0  
Dispositions 0 0  
Foreign currency (19,644) (32,369)  
Other 0 0  
Balance 223,892 232,538 264,907
Other [Member]      
Goodwill [Line Items]      
Balance 81,831 81,532  
Impairment   0  
Acquisitions 0 299  
Dispositions 0 0  
Foreign currency 0 0  
Other 0 0  
Balance $ 81,831 $ 81,831 $ 81,532