Quarterly report pursuant to Section 13 or 15(d)

Investments In Affiliates Accounted For Using The Equity Method (Schedule Of Equity Ownership And Carrying Amount) (Details)

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Investments In Affiliates Accounted For Using The Equity Method (Schedule Of Equity Ownership And Carrying Amount) (Details) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Dec. 31, 2012
Investments in affiliates, accounted for using the equity method $ 883   $ 883   $ 851
Gains (losses) on dispositions, net (2) 288 (2) 288  
Interactive Group [Member]
          
Investments in affiliates, accounted for using the equity method 322   322   304
Gains (losses) on dispositions, net   0 (1) 0  
Interactive Group [Member] | HSN, Inc. [Member]
          
Percentage ownership 37.00%   37.00%    
Investments in affiliates, accounted for using the equity method 270   270   242
Equity Method Investment, Quoted Market Value 1,075   1,075    
Interactive Group [Member] | Equity method investment, other [Member]
          
Investments in affiliates, accounted for using the equity method 52   52   62
Ventures Group [Member]
          
Investments in affiliates, accounted for using the equity method 561   561   547
Gains (losses) on dispositions, net   288 (1) 288  
Ventures Group [Member] | Expedia [Member]
          
Percentage ownership 17.00%   17.00%    
Investments in affiliates, accounted for using the equity method 438 [1]   438 [1]   431 [1]
Equity Method Investment, Quoted Market Value 1,388   1,388    
Ventures Group [Member] | Equity method investment, other [Member]
          
Investments in affiliates, accounted for using the equity method 123   123   116
TripAdvisor, Inc. [Member]
          
Ownership Interest In Investee 22.00%   22.00%    
Revenue from Related Parties 54 56 115 107  
TripAdvisor, Inc. [Member] | Ventures Group [Member]
          
Investments in affiliates, accounted for using the equity method $ 0   $ 0    
[1] Liberty's 22% owned consolidated subsidiary TripAdvisor, Inc. earned revenue of approximately $54 million and $115 million for the three and six months ended June 30, 2013, respectively, and $56 million and $107 million for the three and six months ended June 30, 2012, respectively, from Expedia, Inc. (TripAdvisor's former parent).