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) (USD $)
In Millions, unless otherwise specified
6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Dec. 31, 2012
Cash proceeds from dispositions $ 1,136 $ 348  
Investments in available-for-sale securities and other cost investments 1,365   1,819
Time Warner Inc [Member]
     
Sale of Available for Sale Securities, Shares 17.4    
AOL Inc [Member]
     
Sale of Available for Sale Securities, Shares 2.0    
Time Warner [Member]
     
Cash proceeds from dispositions 1,099    
Interactive Group [Member]
     
Cash proceeds from dispositions 0 0  
Cost Method Investments 4   4
Investments in available-for-sale securities and other cost investments 4   4
Ventures Group [Member]
     
Cash proceeds from dispositions 1,136 348  
Investments in available-for-sale securities and other cost investments 1,361   1,815
Ventures Group [Member] | Time Warner Inc [Member]
     
Investments in available-for-sale securities and other cost investments 254 [1]   1,042
Ventures Group [Member] | Time Warner Cable Inc [Member]
     
Investments in available-for-sale securities and other cost investments 615   531
Ventures Group [Member] | AOL Inc [Member]
     
Investments in available-for-sale securities and other cost investments 0 [1]   59
Ventures Group [Member] | TripAdvisor AFS Securities [Member]
     
Investments in available-for-sale securities and other cost investments 220   99
Ventures Group [Member] | Other Investments [Member]
     
Investments in available-for-sale securities and other cost investments $ 272   $ 84
[1] Liberty sold 17.4 million shares of Time Warner Inc. and 2 million shares of AOL Inc. for proceeds of $1,099 million during the six months ended June 30, 2013 in connection with the redemption of the 3.125% Exchangeable Senior Debentures, as discussed in note 9.