Quarterly report pursuant to Section 13 or 15(d)

Investments In Available-For-Sale Securities And Other Cost Investments (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 (Investments In Available-For-Sale Securities And Other Cost Investments) (Details)
$ in Millions
Sep. 30, 2017
USD ($)
Dec. 31, 2016
USD ($)
May 18, 2016
Schedule of Investments in available-for-sale securities and other cost investments      
Investments in available-for-sale securities and other cost investments $ 2,481 $ 1,922  
QVC Group Common Stock      
Schedule of Investments in available-for-sale securities and other cost investments      
Investments in available-for-sale securities and other cost investments 4 4  
Liberty Ventures common stock      
Schedule of Investments in available-for-sale securities and other cost investments      
Investments in available-for-sale securities and other cost investments 2,477 1,918  
Other Investments | QVC Group Common Stock      
Schedule of Investments in available-for-sale securities and other cost investments      
Investments in available-for-sale securities and other cost investments 4 4  
Other Investments | Liberty Ventures common stock      
Schedule of Investments in available-for-sale securities and other cost investments      
Investments in available-for-sale securities and other cost investments 85 73  
Charter      
Schedule of Investments in available-for-sale securities and other cost investments      
Share exchange ratio     1
Charter | Liberty Ventures common stock      
Schedule of Investments in available-for-sale securities and other cost investments      
Investments in available-for-sale securities and other cost investments 1,947 1,543  
ILG | Liberty Ventures common stock      
Schedule of Investments in available-for-sale securities and other cost investments      
Investments in available-for-sale securities and other cost investments $ 445 $ 302