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Television Distribution Rights, Net (Future Amortization Expense) (Details) - Television distribution rights
$ in Millions
Mar. 31, 2017
USD ($)
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]  
Remainder of 2017 $ 84
2018 23
2019 13
2020 11
2021 $ 3