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
Jun. 30, 2012
Dec. 31, 2011
Investments in available-for-sale securities $ 1,384 $ 1,168
Time Warner Inc [Member]
   
Investments in available-for-sale securities 839 787
Time Warner Cable Inc [Member]
   
Investments in available-for-sale securities 449 348
Other AFS Debt Securities [Member]
   
Investments in available-for-sale securities $ 96 $ 33