Annual report pursuant to Section 13 and 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) - USD ($)
$ in Millions
Dec. 31, 2017
Dec. 31, 2016
Schedule of Investments in available-for-sale securities and other cost investments    
Investments in available-for-sale securities and other cost investments $ 2,363 $ 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 3 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 2,360 1,918
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 86 73
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 1,800 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 474 302
Fair Value Option, Other Eligible Items | 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 $ 3 $ 4