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Significant Accounting Policies - Additional Information (Detail) (USD $) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2013 | Jun. 30, 2013 | Dec. 31, 2012
Accounting Policies [Abstract] |  |  |
Deferred merchant payables | $ 31,251,000 | $ 31,251,000 | $ 1,303,000
Operating cash flow generated |  | 15,535,000 |
Payable balance acquired with business acquisition | $ 14,500,000 |  |

X
- Definition Acquired customer advances. + References No definition available. + Details
Name: | trip_AcquiredCustomerAdvances
Namespace Prefix: | trip_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Cash, net of commissions, received by travelers at time of booking that is due to hotels and vacation rental owners after the traveler's use. + References No definition available. + Details
Name: | trip_DeferredMerchantPayables
Namespace Prefix: | trip_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The increase in operating cash related to cash, net of commissions, received by travelers at time of booking that is due to hotels and vacation rental owners after the traveler's use. + References No definition available. + Details
Name: | trip_IncreaseDecreaseInCustomerAdvance
Namespace Prefix: | trip_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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