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
Sep. 30, 2014
Dec. 31, 2013
Schedule of Investments in available-for-sale securities and other cost investments    
Investments in available-for-sale securities and other cost investments $ 1,161 $ 1,313
Interactive Group
   
Schedule of Investments in available-for-sale securities and other cost investments    
Cost Method Investments 4 4
Investments in available-for-sale securities and other cost investments 4 4
Ventures Group
   
Schedule of Investments in available-for-sale securities and other cost investments    
Investments in available-for-sale securities and other cost investments 1,157 1,309
Other Investments | Ventures Group
   
Schedule of Investments in available-for-sale securities and other cost investments    
Investments in available-for-sale securities and other cost investments 42 262
Time Warner Cable Inc | Fair Value Option, Other Eligible Items | Ventures Group
   
Schedule of Investments in available-for-sale securities and other cost investments    
Investments in available-for-sale securities and other cost investments 785 741
Time Warner Inc | Fair Value Option, Other Eligible Items | Ventures Group
   
Schedule of Investments in available-for-sale securities and other cost investments    
Investments in available-for-sale securities and other cost investments $ 330 $ 306