Name:	pcln_TreasuryStockAcquiredRepurchaseAuthorizationAdditionalValue
Namespace Prefix:	pcln_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Maximum value of common stock to be repurchased authorized by the entity's board of directors to be funded by proceeds from the issuance of debt.

No definition available.

Name:	pcln_TreasuryStockAcquiredRepurchaseFromProceedsOfNotesValue
Namespace Prefix:	pcln_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Number of shares that have been repurchased during the period and are being held in treasury excluding the number of shares employees use to pay the employer who has or will pay the employees' income tax withholding obligations as part of a net-share settlement of share-based awards.

No definition available.

Name:	pcln_TreasuryStockSharesAcquiredExcludingSharesPaidForTaxWithholdingForShareBasedCompensation
Namespace Prefix:	pcln_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

Equity impact of the cost of common and preferred stock that were repurchased during the period excluding the value of shares employees use to pay the employer who has or will pay the employees' income tax withholding obligations as part of a net-share settlement of share-based awards. Recorded using the cost method.

No definition available.

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

The amount of adjustment to stockholders' equity associated with an employee's income tax withholding obligation as part of a net-share settlement of a share-based award.

No definition available.

Name:	us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

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

For net-share settlement of share-based awards when the employer settles employees' income tax withholding obligations, this element represents the number of shares the employees use to repay the employer.

No definition available.

Name:	us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

The amount authorized by an entity's Board of Directors under a stock repurchase plan.

No definition available.

Name:	us-gaap_StockRepurchaseProgramAuthorizedAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

The remaining repurchase amount authorized by an entity's Board of Directors under a stock repurchase plan.

No definition available.

Name:	us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Number of common and preferred shares that were previously issued and that were repurchased by the issuing entity and held in treasury on the financial statement date. This stock has no voting rights and receives no dividends.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.28,29)

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

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 29, 30

-Article 5