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
9 Months Ended 3 Months Ended 9 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Dec. 31, 2012
Jun. 30, 2013
Time Warner Inc [Member]
Jun. 30, 2013
AOL Inc [Member]
Jun. 30, 2013
Time Warner [Member]
Sep. 30, 2013
Interactive Group [Member]
Sep. 30, 2012
Interactive Group [Member]
Dec. 31, 2012
Interactive Group [Member]
Sep. 30, 2013
Ventures Group [Member]
Sep. 30, 2012
Ventures Group [Member]
Dec. 31, 2012
Ventures Group [Member]
Sep. 30, 2013
Ventures Group [Member]
Time Warner Inc [Member]
Dec. 31, 2012
Ventures Group [Member]
Time Warner Inc [Member]
Sep. 30, 2013
Ventures Group [Member]
Time Warner Cable Inc [Member]
Dec. 31, 2012
Ventures Group [Member]
Time Warner Cable Inc [Member]
Sep. 30, 2013
Ventures Group [Member]
AOL Inc [Member]
Dec. 31, 2012
Ventures Group [Member]
AOL Inc [Member]
Sep. 30, 2013
Ventures Group [Member]
TripAdvisor AFS Securities [Member]
Dec. 31, 2012
Ventures Group [Member]
TripAdvisor AFS Securities [Member]
Sep. 30, 2013
Ventures Group [Member]
Other Investments [Member]
Dec. 31, 2012
Ventures Group [Member]
Other Investments [Member]
Sale of Available for Sale Securities, Shares       17.4 2.0                                  
Cash proceeds from dispositions $ 1,136 $ 348       $ 1,099 $ 0 $ 0   $ 1,136 $ 348                      
Cost Method Investments             4   4                          
Investments in available-for-sale securities and other cost investments $ 1,343   $ 1,819       $ 4   $ 4 $ 1,339   $ 1,815 $ 289 [1] $ 1,042 $ 610 $ 531 $ 0 [1] $ 59 $ 164 $ 99 $ 276 $ 84
[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 the three months ended June 30, 2013 in connection with the redemption of the 3.125% Exchangeable Senior Debentures, as discussed in note 9.