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OTHER INFORMATION (Detail) - USD ($)
 3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Apr. 08, 2019
Dec. 31, 2018
Class of Stock [Line Items]        
Change in deferred income tax liabilities   $ 0    
Preferred stock, shares issued 0     0
Preferred stock, par value (in dollars per share) $ 0.001     $ 0.001
Preferred stock, par value $.001 per share, 150,000,000 shares authorized, no shares issued and outstanding $ 0     $ 0
iHeart Operations, Inc. | Series A Preferred Stock        
Class of Stock [Line Items]        
Covenant terms, amount of sale or transfer of assets that would trigger equity purchase $ 100,000,000      
Subsequent Event | iHeart Operations, Inc. | Series A Preferred Stock        
Class of Stock [Line Items]        
Preferred stock, shares issued     60,000  
Preferred stock, par value (in dollars per share)     $ 0.001  
Preferred stock, liquidation preference     $ 60,000,000  
Preferred stock, par value $.001 per share, 150,000,000 shares authorized, no shares issued and outstanding     $ 60,000,000  
Subsequent Event | CCH | Series A Preferred Stock        
Class of Stock [Line Items]        
Preferred stock, shares issued     45,000  
Preferred stock, par value (in dollars per share)     $ 0.01  
Preferred stock, liquidation preference     $ 45,000,000  
Preferred stock, par value $.001 per share, 150,000,000 shares authorized, no shares issued and outstanding     $ 45,000,000  
LIBOR | iHeart Operations, Inc. | Series A Preferred Stock        
Class of Stock [Line Items]        
Basis spread on variable rate 2.00%