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Employee Benefit Plans (Details Textual) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended	2 Months Ended	12 Months Ended		10 Months Ended	12 Months Ended
	Dec. 31, 2012 Maximum [Member] Installment	Dec. 31, 2011 Trip Advisor [Member]	Dec. 31, 2012 Trip Advisor [Member]	Dec. 31, 2011 Trip Advisor [Member]	Oct. 31, 2011 Expedia [Member]	Dec. 31, 2011 Expedia [Member]	Dec. 31, 2010 Expedia [Member]
Employee Benefit Plans (Textual) [Abstract]
Percentage of Contribution of pretax salary		50.00%			50.00%
Maximum employer contribution		50.00%			50.00%
Percentage of employee contributions to the plan		6.00%			6.00%
Percentage of participant`s eligible earnings		3.00%			3.00%
Contributions vested with the employees		2 years			2 years
Contributions to plans			$ 3.1			$ 2.0	$ 1.0
Maximum Percentage of employee contributions to the plan after-tax basis				10.00%
Automatic enrollment feature pre-tax		3.00%
Common Stock available for issuance to non-employee directors			100,000
No of installments for payments upon termination	5

X

- Definition

Defined contribution plan automatic enrollment feature pre tax percentage.

+ References

No definition available.

+ Details

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Namespace Prefix:	trip_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The Company matches 50% of the first 6% of the employees salary.

+ References

No definition available.

+ Details

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Namespace Prefix:	trip_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Defined contribution plan maximum annual contribution by employee percent.

+ References

No definition available.

+ Details

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Namespace Prefix:	trip_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Defined contribution plan maximum annual contribution percent by employee.

+ References

No definition available.

+ Details

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Namespace Prefix:	trip_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Defined contribution plan maximum annual contribution percent by employee of pretax salary.

+ References

No definition available.

+ Details

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Namespace Prefix:	trip_
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Balance Type:	na
Period Type:	duration

X

- Definition

Defined contribution plan required service period for vesting under plan.

+ References

No definition available.

+ Details

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Namespace Prefix:	trip_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	trip_EmployeeBenefitPlansTextualAbstract
Namespace Prefix:	trip_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The number of annual installments that participants in the Deferred Compensation Plan will receive upon termination.

+ References

No definition available.

+ Details

Name:	trip_NumberOfInstallments
Namespace Prefix:	trip_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Aggregate number of common shares reserved for future issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 129

-Paragraph 4

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.29)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The amount of the cost recognized during the period for defined contribution plans.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 70

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6414718&loc=d3e28014-114942



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph 11

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Maximum percentage of employee gross pay, by the terms of the plan, that the employer may contribute to a defined contribution plan.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration