Annual report pursuant to Section 13 and 15(d)

Goodwill and Other Intangible Assets (Intangibles Not Subject to Amortization) (Details)

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Goodwill and Other Intangible Assets (Intangibles Not Subject to Amortization) (Details) - USD ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
SIRIUS XM    
Indefinite-lived Intangible Assets [Line Items]    
Indefinite-Lived Trade Names $ 931  
Braves Holdings    
Indefinite-lived Intangible Assets [Line Items]    
Indefinite-Lived Franchise Rights $ 143 $ 143