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This amount represents the square footage of the Company's leased office space excluding our corporate headquarter buildings.

+ References

No definition available.

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- Definition

Letter of credit held as collateral under lease agreement.

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- Definition

Number of location under lease.

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No definition available.

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- Definition

Operating leases final base rent per square foot per annum.

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No definition available.

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Operating leases initial base rent per square foot per annum.

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- Definition

Threshold percentage of damages sought to consolidated assets requiring disclosure.

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- Definition

Area of a real estate property.

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- Definition

Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

+ References

No definition available.

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- Definition

Date which lease or group of leases is set to expire, in CCYY-MM-DD format.

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- Definition

Term of the lessee's leasing arrangement renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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No definition available.

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Term of the lessee's leasing arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

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No definition available.

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- Definition

Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 20

-Section 50

-Paragraph 2

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 10

-Section 55

-Paragraph 40

-Subparagraph (Note 3)

-URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697

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- Definition

Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Commitments and Contingencies - Additional Information (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended			1 Months Ended
	Dec. 31, 2014 Location	Dec. 31, 2013	Dec. 31, 2012	Jun. 30, 2013
Commitment And Contingencies [Line Items]
Rental expense	$ 17us-gaap_LeaseAndRentalExpense	$ 11us-gaap_LeaseAndRentalExpense	$ 8us-gaap_LeaseAndRentalExpense
Lease expiration date	Dec. 01, 2030
Leased area				280,000us-gaap_AreaOfRealEstateProperty
Aggregate future minimum lease payments, total	114
Aggregate future minimum lease payments in 2015	19
Aggregate future minimum lease payments in 2020 and thereafter	42
Leased location	40trip_NumberOfLocationUnderLease
Criteria percentage of damages claims	10.00%
Letter of Credit
Commitment And Contingencies [Line Items]
Letter of credit issued	1
North America And Europe And Asia Pacific
Commitment And Contingencies [Line Items]
Lease expiration date	Nov. 01, 2024
Leased area	470,000
New Corporate Headquarters
Commitment And Contingencies [Line Items]
Initial term of Lease				15 years 7 months
Initial base rent				33.00
Increase in base rent				34.50
Extended Lease Term				5 years
Aggregate future minimum lease payments, total	143
Aggregate future minimum lease payments in 2015	1
Aggregate future minimum lease payments in 2016	9
Aggregate future minimum lease payments in 2017	9
Aggregate future minimum lease payments in 2018	9
Aggregate future minimum lease payments in 2019	9
Aggregate future minimum lease payments in 2020 and thereafter	106
Security Deposits	$ 1
Newton, Massachusetts
Commitment And Contingencies [Line Items]
Lease expiration date	Apr. 01, 2015
Headquarters \| Newton, Massachusetts
Commitment And Contingencies [Line Items]
Leased area	119,000