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Business Description and Basis of Presentation - Additional Information (Details) | 6 Months Ended
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Jun. 30, 2016 Market Brand Segment
Accounting Policies [Abstract] |
Number of markets with localized versions of website | Market | 47
Number of other media brands with websites | Brand | 23
Number of reportable segment | Segment | 2

X
- Definition Number of markets with localized websites. + References No definition available. + Details
Name: | trip_NumberOfMarketsWithLocalizedWebsites
Namespace Prefix: | trip_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of other travel brands. + References No definition available. + Details
Name: | trip_NumberOfOtherTravelBrands
Namespace Prefix: | trip_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_AccountingPoliciesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. + References No definition available. + Details
Name: | us-gaap_NumberOfReportableSegments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration