Annual report pursuant to Section 13 and 15(d)

Intangible Assets (Changes In The Carrying Amount Of Goodwill) (Details)

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Intangible Assets (Changes In The Carrying Amount Of Goodwill) (Details) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Goodwill [Roll Forward]    
Balance, beginning of the year $ 5,978 $ 5,983
Goodwill, Acquired During Period 3,689 4
Foreign currency translation adjustments (26) (9)
Other (3)  
Balance, ending of the year 9,556 5,978
Goodwill, Impairment Loss (82)  
QVC [Member]
    
Goodwill [Roll Forward]    
Balance, beginning of the year 5,354 5,363
Goodwill, Acquired During Period 21   
Foreign currency translation adjustments (26) (9)
Other 0  
Balance, ending of the year 5,349 5,354
Goodwill, Impairment Loss 0  
E-commerce [Member]
    
Goodwill [Roll Forward]    
Balance, beginning of the year 624 620
Goodwill, Acquired During Period 19 4
Foreign currency translation adjustments 0 0
Other (3)  
Balance, ending of the year 558 624
Goodwill, Impairment Loss (82)  
TripAdvisor, Inc. [Member]
    
Goodwill [Roll Forward]    
Balance, beginning of the year 0 0
Goodwill, Acquired During Period 3,649 0
Foreign currency translation adjustments 0 0
Other 0  
Balance, ending of the year 3,649 0
Goodwill, Impairment Loss $ 0