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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
Mar. 31, 2013
Dec. 31, 2012
Mar. 31, 2013
Interactive Group [Member]
Dec. 31, 2012
Interactive Group [Member]
Mar. 31, 2013
Interactive Group [Member]
HSN, Inc. [Member]
Dec. 31, 2012
Interactive Group [Member]
HSN, Inc. [Member]
Mar. 31, 2013
Interactive Group [Member]
Equity method investment, other [Member]
Dec. 31, 2012
Interactive Group [Member]
Equity method investment, other [Member]
Mar. 31, 2013
Ventures Group [Member]
Dec. 31, 2012
Ventures Group [Member]
Mar. 31, 2013
Ventures Group [Member]
Expedia [Member]
Dec. 31, 2012
Ventures Group [Member]
Expedia [Member]
Mar. 31, 2013
Ventures Group [Member]
Equity method investment, other [Member]
Dec. 31, 2012
Ventures Group [Member]
Equity method investment, other [Member]
Mar. 31, 2013
TripAdvisor, Inc. [Member]
Mar. 31, 2012
TripAdvisor, Inc. [Member]
Mar. 31, 2013
TripAdvisor, Inc. [Member]
Ventures Group [Member]
Ownership Interest In Investee Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý 22.00% Ìý Ìý
Percentage ownership Ìý Ìý Ìý Ìý 37.00% Ìý Ìý Ìý Ìý Ìý 17.00% Ìý Ìý Ìý Ìý Ìý Ìý
Investments in affiliates, accounted for using the equity method $ 870 $ 851 $ 319 $ 304 $ 261 $ 242 $ 58 $ 62 $ 551 $ 547 $ 430 [1] $ 431 [1] $ 121 $ 116 Ìý Ìý $ 0
Equity Method Investment, Quoted Market Value Ìý Ìý Ìý Ìý 1,098 Ìý Ìý Ìý Ìý Ìý 1,385 Ìý Ìý Ìý Ìý Ìý Ìý
Revenue from Related Parties Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý Ìý $ 60 $ 52 Ìý
[1] Liberty's 22% owned consolidated subsidiary TripAdvisor, Inc. earned revenue of approximately $60 million and $52 million for the three months ended March 31, 2013 and 2012, respectively, from Expedia, Inc. (TripAdvisor's former parent).