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Equity Method Investments (Narrative) (Details) - USD ($)
$ in Millions
Dec. 31, 2016
Dec. 31, 2015
Schedule of Equity Method Investments [Line Items]    
Undistributed earnings from equity affiliates $ 196 $ 162
SKY Mexico [Member]    
Schedule of Equity Method Investments [Line Items]    
Company's ownership interest in investee 41.30%  
Game Show Network [Member]    
Schedule of Equity Method Investments [Line Items]    
Company's ownership interest in investee 42.00%  
Otter Media [Member]    
Schedule of Equity Method Investments [Line Items]    
Company's ownership interest in investee 48.30%