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

EmploymentContracts [Abstract]

No definition available.

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
Balance Type:	na
Period Type:	duration

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

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

Pricing Parity Working Group

No definition available.

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

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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