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Investments Cost Method Investments (Details) - USD ($)
$ in Millions
6 Months Ended
Jul. 29, 2011
Jul. 29, 2008
Jun. 30, 2015
Jan. 01, 2018
Dec. 28, 2014
Oct. 27, 2009
New Cubs LLC | Payment Guarantee            
Line of Credit Facility [Line Items]            
Guarantor maximum exposure           $ 699
Newsday LLC | Indemnification Agreement            
Line of Credit Facility [Line Items]            
Guarantor maximum exposure   $ 650 $ 425   $ 425  
Reduction in Maximum Indemnification Amount after Third Anniversary $ 120          
Reduction in Maximum Indemnification Amount per year after Third Anniversary until January 1, 2018     $ 35      
Scenario, Forecast | Newsday LLC | Indemnification Agreement            
Line of Credit Facility [Line Items]            
Guarantor maximum exposure       $ 0    
Newsday Holdings LLC and Newsday LLC [Member] | Secured Debt            
Line of Credit Facility [Line Items]            
Line of Credit Assumed   $ 650