Quarterly report pursuant to Section 13 or 15(d)

Investments In Available-For-Sale Securities And Other Cost Investments (Details)

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Investments In Available-For-Sale Securities And Other Cost Investments (Details) - USD ($)
shares in Millions, $ in Millions
9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Dec. 31, 2015
Schedule of Investments [Line Items]      
Investments in available-for-sale securities and other cost investments $ 1,249   $ 533
Proceeds from Sale of Available-for-sale Securities 61 $ 175  
Viacom, Inc.      
Schedule of Investments [Line Items]      
Available for sale securities number of shares sold   1.8  
Proceeds from Sale of Available-for-sale Securities   $ 122  
Liberty Braves Group      
Schedule of Investments [Line Items]      
Investments in available-for-sale securities and other cost investments 8   8
Proceeds from Sale of Available-for-sale Securities   24  
Liberty Braves Group | AFS and cost method investments      
Schedule of Investments [Line Items]      
Investments in available-for-sale securities and other cost investments 8   8
Liberty Media Group      
Schedule of Investments [Line Items]      
Investments in available-for-sale securities and other cost investments 1,241   525
Proceeds from Sale of Available-for-sale Securities 61 $ 151  
Liberty Media Group | Fair Value Option Securities      
Schedule of Investments [Line Items]      
Investments in available-for-sale securities and other cost investments 420   450
Liberty Media Group | AFS and cost method investments      
Schedule of Investments [Line Items]      
Investments in available-for-sale securities and other cost investments 821   75
Liberty Media Group | Other equity securities | Fair Value Option Securities      
Schedule of Investments [Line Items]      
Investments in available-for-sale securities and other cost investments 11   74
Liberty Media Group | Other Debt Obligations | Fair Value Option Securities      
Schedule of Investments [Line Items]      
Investments in available-for-sale securities and other cost investments     25
Liberty Media Group | Other AFS Equity Securities | AFS and cost method investments      
Schedule of Investments [Line Items]      
Investments in available-for-sale securities and other cost investments 51   51
Liberty Media Group | Time Warner Inc | Fair Value Option Securities      
Schedule of Investments [Line Items]      
Investments in available-for-sale securities and other cost investments 339   275
Liberty Media Group | Viacom, Inc. | Fair Value Option Securities      
Schedule of Investments [Line Items]      
Investments in available-for-sale securities and other cost investments 70   76
Liberty Media Group | Live Nation debt securities | AFS and cost method investments      
Schedule of Investments [Line Items]      
Investments in available-for-sale securities and other cost investments 24   $ 24
Liberty Media Group | Formula 1 | AFS and cost method investments      
Schedule of Investments [Line Items]      
Investments in available-for-sale securities and other cost investments $ 746