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Commitments, Contingencies And Guarantees (Narrative) (Detail) (USD $)
 12 Months Ended
Dec. 31, 2013
Signs
lawsuits
Dec. 31, 2012
Dec. 31, 2011
Stockholder Litigation [Abstract]      
Derivative lawsuits 2    
Lawsuit filing date 2012-03-31    
Breach date Dec. 31, 2009    
Binding memorandum of understanding date Mar. 28, 2013    
Stipulation of Settlement execution date Jul. 08, 2013    
Original Stipulation of Settlement 8-K filing date Jul. 09, 2013    
Settlement approval date Sep. 09, 2013    
Right to appeal expiration date Oct. 09, 2013    
Repayment demand notification date Oct. 19, 2013    
Demand repayment amount $ 200,000,000    
Repayment date Nov. 08, 2013    
Declared dividend 200,000,000    
Note amendment date Oct. 23, 2013    
Dividend declaration 8-K filing date Oct. 21, 2013    
Note amendment 8-K filing date Oct. 23, 2013    
Demand and dividend 8-K filing date Nov. 08, 2013    
Los Angeles Litigation [Abstract]      
Lawsuit date Dec. 31, 2008    
Settlement agreement date Nov. 30, 2006    
Ruling date Jan. 31, 2010    
Conversion from static to digital 83    
Upholding date Dec. 10, 2012    
Review request date 2013-01-22    
Review denial date 2013-02-27    
Invalidation date Apr. 12, 2013    
Digital modernization permits issued to Company 82    
Digital displays operating 77    
Digital displays not invalidated 2    
Digital modernization permits issued to competitor 13    
Turn off date Apr. 15, 2013    
Further proceedings conducted date Apr. 16, 2013    
Demolition denial date Nov. 22, 2013    
Attorney's fees denial date Jan. 21, 2014    
Deferred consideration payment from acquisitions 30,000,000    
Rent expense $ 1,160,000,000 $ 1,140,000,000 $ 1,160,000,000