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Stockholders' Equity - Accumulated Other Comprehensive Loss Primarily Comprised of Accumulated Foreign Currency Translation Adjustments (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2013 | Dec. 31, 2012
Equity [Abstract] |  |
Unrealized tax benefits | $ 0.4 | $ 0.1

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- Definition Other comprehensive income available for sale cumulated securities tax. + References No definition available. + Details
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Namespace Prefix: | trip_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration