Quarterly report pursuant to Section 13 or 15(d)

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 (Details) (USD $)
In Millions, unless otherwise specified
Sep. 30, 2013
Dec. 31, 2012
Investments in available-for-sale securities and other cost investments $ 1,275 $ 1,392
Time Warner Inc [Member]
   
Investments in available-for-sale securities and other cost investments 291 [1] 211
Time Warner Cable Inc [Member]
   
Investments in available-for-sale securities and other cost investments 264 [1] 230
Viacom, Inc. [Member]
   
Investments in available-for-sale securities and other cost investments 303 [1] 192
Century Link, Inc. [Member]
   
Investments in available-for-sale securities and other cost investments 57 [1] 70
Barnes & Noble, Inc. [Member]
   
Investments in available-for-sale securities and other cost investments 231 262
Other AFS Equity Securities [Member]
   
Investments in available-for-sale securities and other cost investments 40 58
SIRIUS XM Debt Securities [Member]
   
Investments in available-for-sale securities and other cost investments 0 [2] 249
Live Nation [Member]
   
Investments in available-for-sale securities and other cost investments 24 25
Other Investments [Member]
   
Investments in available-for-sale securities and other cost investments 31 39
Other AFS Debt Securities [Member]
   
Investments in available-for-sale securities and other cost investments 34 56
Fair Value Opition Securities [Member]
   
Investments in available-for-sale securities and other cost investments 1,220 1,079
AFS and cost method investments [Member]
   
Investments in available-for-sale securities and other cost investments $ 55 $ 313
[1] See note 10 for details regarding the number and fair value of shares pledged as collateral pursuant to certain margin loan agreements as of September 30, 2013.
[2] During the three months ended March 31, 2013, as discussed in note 2, Liberty acquired an additional 50 million common shares and acquired a controlling interest in SIRIUS XM and as a result consolidates SIRIUS XM as of such date. Therefore, the related SIRIUS XM debt securities are considered effectively settled upon consolidation.