| 
           Intangible Assets (Changes In The Carrying Amount Of Goodwill) (Details) (USD $) 
        In Millions, unless otherwise specified  | 
        6 Months Ended | ||||
|---|---|---|---|---|---|
| 
           Jun. 30, 2014 
         | 
        
           Jun. 30, 2013 
         | 
      ||||
| Payments to Acquire Businesses, Net of Cash Acquired | $ 152 | $ 32 | |||
| Goodwill [Roll Forward] | |||||
| Balance, beginning of the year | 9,332 | ||||
| Foreign currency translation adjustments | 12 | ||||
| Acquisitions | 105 | [1] | |||
| Balance, ending of the year | 9,439 | ||||
| Goodwill, Impairment Loss | 10 | ||||
| 
           QVC 
         | 
        |||||
| Goodwill [Roll Forward] | |||||
| Balance, beginning of the year | 5,312 | ||||
| Foreign currency translation adjustments | 12 | ||||
| Acquisitions | 0 | ||||
| Balance, ending of the year | 5,324 | ||||
| Goodwill, Impairment Loss | 0 | ||||
| 
           E-commerce 
         | 
        |||||
| Goodwill [Roll Forward] | |||||
| Balance, beginning of the year | 560 | ||||
| Foreign currency translation adjustments | 0 | ||||
| Acquisitions | 0 | ||||
| Balance, ending of the year | 550 | ||||
| Goodwill, Impairment Loss | 10 | ||||
| 
           TripAdvisor, Inc. 
         | 
        |||||
| Payments to Acquire Businesses, Net of Cash Acquired | 152 | ||||
| Goodwill [Roll Forward] | |||||
| Balance, beginning of the year | 3,460 | ||||
| Foreign currency translation adjustments | 0 | ||||
| Acquisitions | 105 | [1] | |||
| Balance, ending of the year | 3,565 | ||||
| Cash Acquired from Acquisition | 6 | ||||
| Finite-lived Intangible Assets Acquired | 66 | ||||
| Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent | 17 | ||||
| Goodwill, Impairment Loss | $ 0 | ||||
          
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