Stock-Based Compensation (Narrative) (Details) (USD $)
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3 Months Ended | 12 Months Ended | 12 Months Ended | 3 Months Ended | 3 Months Ended | 12 Months Ended | 3 Months Ended | 12 Months Ended | 3 Months Ended | 12 Months Ended | |||||||||||||||||
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Sep. 30, 2012
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Dec. 31, 2013
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Dec. 31, 2012
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Dec. 31, 2011
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Aug. 09, 2012
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Jun. 24, 2010
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May 01, 2007
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Dec. 31, 2000
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Dec. 31, 2013
Minimum [Member]
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Dec. 31, 2013
Maximum [Member]
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Dec. 31, 2012
Interactive Group [Member]
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Dec. 31, 2013
Interactive Group [Member]
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Dec. 31, 2012
Interactive Group [Member]
Series A [Member]
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Dec. 31, 2013
Interactive Group [Member]
Series A [Member]
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Dec. 31, 2012
Interactive Group [Member]
Series A [Member]
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Dec. 31, 2011
Interactive Group [Member]
Series A [Member]
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Dec. 31, 2012
Ventures Group [Member]
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Dec. 31, 2013
Ventures Group [Member]
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Dec. 31, 2012
Ventures Group [Member]
Series A [Member]
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Mar. 31, 2012
Ventures Group [Member]
Series A [Member]
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Dec. 31, 2013
Ventures Group [Member]
Series A [Member]
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Dec. 31, 2013
TripAdvisor, Inc. [Member]
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Dec. 31, 2013
Option Exchange [Member]
Interactive Group [Member]
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Dec. 31, 2013
Option Exchange [Member]
Ventures Group [Member]
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Dec. 31, 2012
Option Exchange [Member]
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Dec. 31, 2013
2012 Plan [Member]
Minimum [Member]
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Dec. 31, 2013
2012 Plan [Member]
Maximum [Member]
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Stockholders' Equity Note, Stock Split, Conversion Ratio | 0.05 | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized | Ìý | Ìý | Ìý | Ìý | 40,000,000 | 42,900,000 | 4,200,000 | 2,900,000 | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
Options granted | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 20,100,000 | 4,300,000 | 3,400,000 | 6,200,000 | Ìý | 7,000 | 900,000 | 0 | 7,000 | 2,800,000 | Ìý | Ìý | Ìý | Ìý | Ìý |
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 1 year 3 months 19 days | 9 years | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 5 years | 10 years |
Weighted average grant-date fair value of options | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | $ 7.15 | $ 8.26 | $ 8.44 | $ 7.32 | Ìý | Ìý | $ 26.58 | $ 27.29 | $ 57.37 | $ 28.30 | Ìý | Ìý | Ìý | Ìý | Ìý |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | (195,000) | Ìý | Ìý | Ìý | 1,500,000 | Ìý | Ìý | Ìý | Ìý | Ìý |
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | $ 52.81 | Ìý | Ìý | Ìý | $ 23.81 | Ìý | Ìý | Ìý | Ìý | Ìý |
Stock-based compensation, vesting period (in years) | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 4 years | 5 years |
Weighted average period of recognition related to unvested Liberty equity awards (in years) | Ìý | 1 year 6 months | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 3 years | Ìý | Ìý | Ìý | Ìý | Ìý |
Dividend rate to estimate fair value | Ìý | 0.00% | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
Total unrecognized compensation cost related to unvested Liberty equity awards | Ìý | $ 109,000,000 | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | $ 104,000,000 | Ìý | Ìý | Ìý | Ìý | Ìý |
Share-based Compensation Arrangement by Share-based Payment Award, Plan Modification, Incremental Compensation Cost | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 17,000,000 | Ìý | Ìý | Ìý | Ìý | Ìý | 4,000,000 | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Total Intrinsic Value | Ìý | 76,000,000 | 339,000,000 | 33,000,000 | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 242,000,000 | Ìý | Ìý |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 1,500,000 | Ìý | Ìý | Ìý | Ìý | Ìý | 100,000 | Ìý | Ìý | Ìý | Ìý | 4,600,000 | 300,000 | Ìý | Ìý | Ìý |
Vested Restricted Stock | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 2,000,000 | 100,000 | Ìý | Ìý | Ìý |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | $ 17.09 | Ìý | Ìý | Ìý | Ìý | Ìý | $ 13.36 | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Total Fair Value | Ìý | 16,000,000 | 12,000,000 | 14,000,000 | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | $ 116.03 | Ìý | Ìý | Ìý | $ 58.03 | Ìý | Ìý | Ìý | Ìý | Ìý |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 30,607,000 | Ìý | Ìý | 1,155,000 | Ìý | Ìý | Ìý | 966,000 | 9,500,000 | Ìý | Ìý | Ìý | Ìý | Ìý |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 492,000 | Ìý | Ìý | Ìý | 3,500,000 | Ìý | Ìý | Ìý | Ìý | Ìý |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price | Ìý | $ 40.18 | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | $ 56.26 | $ 57.42 | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price | Ìý | $ 30.11 | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | $ 55.47 | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 348,277,000 | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 62,981,000 | 404,000,000 | Ìý | Ìý | Ìý | Ìý | Ìý |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value | Ìý | 186,000,000 | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 181,315,000 | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 33,042,000 | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Share-based Awards Other than Options | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | $ 33,000,000 | Ìý | Ìý | Ìý | Ìý | Ìý |