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Stock Based Awards and Other Equity Instruments (Details 3) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2012
RSUs [Member] |
Summary of the unrecognized compensation expense, net of estimated forfeitures and the weighted average period remaining |
Unrecognized compensation expense (net of forfeitures), RSUs | $ 4,486
Weighted average period remaining (in years), RSUs | 1 year 9 months 18 days
Stock Options [Member] |
Summary of the unrecognized compensation expense, net of estimated forfeitures and the weighted average period remaining |
Unrecognized compensation expense (net of forfeitures), Stock Options | $ 59,686
Weighted average period remaining (in years), Stock Options | 3 years

X
- Definition The weighted average remaining vesting period over which unamortized cost of stock options will be recognized to the profit and loss statement. + References No definition available. + Details
Name: | trip_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityAwardOptionsOutstandingWeightedAverageRemainingVestPeriod
Namespace Prefix: | trip_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The weighted average remaining vesting period over which unamortized cost of RSU's will be recognized to the profit and loss statement. + References No definition available. + Details
Name: | trip_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingVestPeriod
Namespace Prefix: | trip_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | trip_SummaryOfUnrecognizedCompensationExpenseNetOfEstimatedForfeituresAndWeightedAveragePeriodRemainingAbstract
Namespace Prefix: | trip_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Aggregate unrecognized cost of share-based awards, other than options, made to employees under an equity-based compensation plan, that have yet to vest. + References No definition available. + Details
Name: | us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Aggregate unrecognized cost of option awards made to employees under a stock option plan or plans, that have yet to vest. + References No definition available. + Details
Name: | us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant