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, unless otherwise specified
3 Months Ended
Jun. 30, 2013
Dec. 31, 2013
Dec. 31, 2012
Investments in available-for-sale securities   $ 1,501 $ 1,819
Proceeds from Sale of Available-for-sale Securities 1,099    
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    
Interactive Group [Member]
     
Investments in available-for-sale securities   4 4
Interactive Group [Member] | Other AFS Debt Securities [Member]
     
Investments in available-for-sale securities   4 4
Ventures Group [Member]
     
Investments in available-for-sale securities   1,497 1,815
Ventures Group [Member] | Time Warner Inc [Member]
     
Investments in available-for-sale securities   306 [1] 1,042
Ventures Group [Member] | Time Warner Cable Inc [Member]
     
Investments in available-for-sale securities   741 531
Ventures Group [Member] | Other Investments [Member]
     
Investments in available-for-sale securities   262 [1] 143
Ventures Group [Member] | TripAdvisor AFS Securities [Member]
     
Investments in available-for-sale securities   $ 188 $ 99
[1] Liberty sold 17.4 million shares of Time Warner Inc. and 2.0 million shares of AOL Inc. for proceeds of $1,099 million during 2013 in connection with the redemption of the 3.125% Exchangeable Senior Debentures, as discussed in note 11.