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Investments In Affiliates Accounted For Using The Equity Method (Schedule Of Liberty's Share Of Earnings (Losses) Of Affiliates) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Share of earnings of affiliates, net (note 7) $ 140 $ 112 $ 24
Expedia [Member]
     
Share of earnings of affiliates, net (note 7) 119 [1] 103 [1] 72 [1]
TripAdvisor, Inc. [Member]
     
Share of earnings of affiliates, net (note 7) 0 [1] 0 [1] 0 [1]
HSN, Inc. [Member]
     
Share of earnings of affiliates, net (note 7) 38 31 (37)
Other [Member]
     
Share of earnings of affiliates, net (note 7) $ (17) $ (22) $ (11)
[1] During the fourth quarter of 2011 Expedia, Inc. completed the pro-rata split-off of TripAdvisor, Inc., a wholly owned subsidiary. Therefore, the Company has a 26% ownership interest in each of Expedia, Inc. and TripAdvisor, Inc. as of December 31, 2011.