Name:	pcln_EmploymentAgreementsCashSeverancePaymentsMaximum
Namespace Prefix:	pcln_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Name:	pcln_EmploymentcontractsAbstract
Namespace Prefix:	pcln_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

The maximum extension period, in years, for health and insurance benefits after termination for certain agreements.

No definition available.

Name:	pcln_ExtensionPeriodForHealthAndInsuranceBenefitsAfterTerminationHighEndOfRange
Namespace Prefix:	pcln_
Data Type:	xbrli:durationItemType
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Represents the number of cities from which the entity has received notices of audits or administrative procedures.

No definition available.

Name:	pcln_LossContingenciesAuditNoticesReceivedNumberOfCities
Namespace Prefix:	pcln_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

Represents the number cities and counties from which the entity has received notices of audits or administrative procedures.

No definition available.

Name:	pcln_LossContingenciesAuditNoticesReceivedNumberOfCitiesAndCounties
Namespace Prefix:	pcln_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

This element represents the number of municipalities or counties which have initiated audit proceedings.

No definition available.

Name:	pcln_LossContingencyAuditProceedingsNumberOfMunicipalitiesAndCounties
Namespace Prefix:	pcln_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

This element represents the number of states which have initiated audit proceedings.

No definition available.

Name:	pcln_LossContingencyAuditProceedingsNumberOfStates
Namespace Prefix:	pcln_
Data Type:	xbrli:integerItemType
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Loss Contingency Complaint Filed Alleging Antitrust Violations

No definition available.

Name:	pcln_LossContingencyComplaintFiledAllegingAntitrustViolations
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Data Type:	xbrli:integerItemType
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Name:	pcln_LosscontingencycomplaintsfiledallegingAntitrustviolationsAbstract
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Data Type:	xbrli:stringItemType
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This element represents the number of lawsuits in which the reporting entity was involved.

No definition available.

Name:	pcln_LossContingencyNumberOfLawsuits
Namespace Prefix:	pcln_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

Loss Contingency Other Complaints Alleging Antitrust Violations

No definition available.

Name:	pcln_LossContingencyOtherComplaintsAllegingAntitrustViolations
Namespace Prefix:	pcln_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Represents the tax assessment issued by the tax authority including interest and penalties.

No definition available.

Name:	pcln_LossContingencyTaxInterestandPenaltiesAssessed
Namespace Prefix:	pcln_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

PaymentsOfTaxAndInterestForLossContingencyRelatedToHotelOccupancyAndOtherTaxes

No definition available.

Name:	pcln_PaymentsOfTaxAndInterestForLossContingencyRelatedToHotelOccupancyAndOtherTaxes
Namespace Prefix:	pcln_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Area of a real estate property.

No definition available.

Name:	us-gaap_AreaOfRealEstateProperty
Namespace Prefix:	us-gaap_
Data Type:	num:areaItemType
Balance Type:	na
Period Type:	instant

Name:	us-gaap_LossContingenciesLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Amount of loss contingency liability.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 450

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349

Name:	us-gaap_LossContingencyAccrualAtCarryingValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41499-112717

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Data Type:	xbrli:monetaryItemType
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Period Type:	duration

Name:	us-gaap_RealEstateAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Name:	pcln_LitigationRelatedtoTravelTransactionTaxesByGeographicAreaAxis=pcln_CityOfSanFranciscoMember
Namespace Prefix:
Data Type:	na
Balance Type:
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Name:	pcln_LitigationRelatedtoTravelTransactionTaxesByGeographicAreaAxis=pcln_UsMerchantHotelBusinessMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	pcln_LitigationRelatedtoTravelTransactionTaxesByGeographicAreaAxis=stpr_CO
Namespace Prefix:
Data Type:	na
Balance Type:
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Name:	pcln_LitigationRelatedtoTravelTransactionTaxesByGeographicAreaAxis=stpr_DC
Namespace Prefix:
Data Type:	na
Balance Type:
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Name:	pcln_LitigationRelatedtoTravelTransactionTaxesByGeographicAreaAxis=stpr_HI
Namespace Prefix:
Data Type:	na
Balance Type:
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Name:	pcln_LitigationRelatedtoTravelTransactionTaxesByGeographicAreaAxis=stpr_UT
Namespace Prefix:
Data Type:	na
Balance Type:
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Name:	us-gaap_LeaseArrangementTypeAxis=pcln_DataCenterSpaceLeasesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_LeaseArrangementTypeAxis=pcln_OfficeLeasesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_LossContingenciesByNatureOfContingencyAxis=pcln_LitigationRelatedToAllegedAntiTrustViolationsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_LossContingenciesByNatureOfContingencyAxis=pcln_LitigationRelatedtoTravelTransactionTaxesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
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Name:	us-gaap_StatementGeographicalAxis=pcln_AmsterdamNetherlandsMember
Namespace Prefix:
Data Type:	na
Balance Type:
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Name:	us-gaap_StatementGeographicalAxis=pcln_BangkokThailandMember
Namespace Prefix:
Data Type:	na
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Namespace Prefix:
Data Type:	na
Balance Type:
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Namespace Prefix:
Data Type:	na
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Name:	us-gaap_StatementGeographicalAxis=pcln_SanFranciscoCaliforniaMember
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Data Type:	na
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