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
Mar. 31, 2014
Dec. 31, 2013
Open Option Contracts Written [Line Items]    
Investments in available-for-sale securities and other cost investments $ 1,470 $ 1,501
Interactive Group
   
Open Option Contracts Written [Line Items]    
Cost Method Investments 4 4
Investments in available-for-sale securities and other cost investments 4  
Ventures Group
   
Open Option Contracts Written [Line Items]    
Investments in available-for-sale securities and other cost investments 1,466 1,497
TripAdvisor AFS Securities | Ventures Group
   
Open Option Contracts Written [Line Items]    
Investments in available-for-sale securities and other cost investments 284 188
Other Investments | Ventures Group
   
Open Option Contracts Written [Line Items]    
Investments in available-for-sale securities and other cost investments 145 262
Time Warner Cable Inc | Fair Value Option, Other Eligible Items | Ventures Group
   
Open Option Contracts Written [Line Items]    
Investments in available-for-sale securities and other cost investments 750 741
Time Warner Inc | Fair Value Option, Other Eligible Items | Ventures Group
   
Open Option Contracts Written [Line Items]    
Investments in available-for-sale securities and other cost investments $ 287 $ 306