Cash, Cash Equivalents, Restricted Cash And Restricted Cash Equivalents

No definition available.

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

- Definition

Excess Tax Benefit from Share-based Compensation, Operating Activities, Reclassification from Financing

+ References

No definition available.

+ Details

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

- Definition

Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Cash
-URI http://asc.fasb.org/extlink&oid=6506951

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section 45
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6676-107765

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3044-108585

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Cash Equivalents
-URI http://asc.fasb.org/extlink&oid=6507016

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.1)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_CashAndCashEquivalentsAtCarryingValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount after tax of increase (decrease) to equity or (increase) decrease to net assets, resulting from the cumulative effect adjustment of a new accounting principle applied in the period of adoption.

+ References

No definition available.

+ Details

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

- Definition

The carrying amounts of cash and cash equivalent items which are restricted as to withdrawal or usage. Restrictions may include legally restricted deposits held as compensating balances against short-term borrowing arrangements, contracts entered into with others, or entity statements of intention with regard to particular deposits; however, time deposits and short-term certificates of deposit are not generally included in legally restricted deposits. Excludes compensating balance arrangements that are not agreements which legally restrict the use of cash amounts shown on the balance sheet. For a classified balance sheet represents the current portion only (the noncurrent portion has a separate concept); there is a separate and distinct element for unclassified presentations.

+ References

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 210.5-02.1)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_StatementEquityComponentsAxis=us-gaap_RetainedEarningsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementEquityComponentsAxis=us-gaap_AdditionalPaidInCapitalMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AdjustmentsForNewAccountingPronouncementsAxis=pcln_AccountingStandardsUpdate201618Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AdjustmentsForNewAccountingPronouncementsAxis=pcln_AccountingStandardsUpdate201616Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BalanceSheetLocationAxis=us-gaap_OtherNoncurrentAssetsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BalanceSheetLocationAxis=us-gaap_OtherCurrentAssetsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BalanceSheetLocationAxis=pcln_DeferredIncomeTaxesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	pcln_AccountingStandardsUpdate201609Axis=pcln_AccountingStandardsUpdate201609UnrecognizedEquityDeductionscomponentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AdjustmentsForNewAccountingPronouncementsAxis=pcln_AccountingStandardsUpdate201609Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	pcln_AccountingStandardsUpdate201609Axis=pcln_AccountingStandardsUpdate201609ForfeitureRateComponentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

BASIS OF PRESENTATION Basis of Presentation (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Jan. 01, 2017	Dec. 31, 2016
Cumulative Effect of New Accounting Principle in Period of Adoption	$ 299,305
Cash and cash equivalents	2,434,020			$ 2,081,075
Excess tax benefits on stock-based awards and other equity deductions	0	$ 18,073
Retained Earnings
Cumulative Effect of New Accounting Principle in Period of Adoption	290,317
Additional Paid-In Capital
Cumulative Effect of New Accounting Principle in Period of Adoption	8,988
Accounting Standards Update 2016-18 [Member]
Restricted cash included in prepaid expenses and other current assets	928			932
Total cash, cash equivalents and restricted cash as shown in the Unaudited Consolidated Statements of Cash Flows	$ 2,434,948			$ 2,082,007
Accounting Standards Update 2016-16 [Member] \| Retained Earnings
Cumulative Effect of New Accounting Principle in Period of Adoption			$ (4,200)
Accounting Standards Update 2016-16 [Member] \| Other Noncurrent Assets [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption			6,600
Accounting Standards Update 2016-16 [Member] \| Other Current Assets [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption			3,300
Accounting Standards Update 2016-16 [Member] \| Deferred Income Taxes [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption			(5,700)
Accounting Standards Update 2016-09, Unrecognized Equity Deductions component [Member] \| Accounting Standards Update 2016-09 [Member] \| Retained Earnings
Cumulative Effect of New Accounting Principle in Period of Adoption			301,400
Accounting Standards Update 2016-09, Unrecognized Equity Deductions component [Member] \| Accounting Standards Update 2016-09 [Member] \| Deferred Income Taxes [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption			(301,400)
Accounting Standards Update 2016-09, Forfeiture Rate Component [Member] \| Accounting Standards Update 2016-09 [Member] \| Retained Earnings
Cumulative Effect of New Accounting Principle in Period of Adoption			(6,900)
Accounting Standards Update 2016-09, Forfeiture Rate Component [Member] \| Accounting Standards Update 2016-09 [Member] \| Additional Paid-In Capital
Cumulative Effect of New Accounting Principle in Period of Adoption			9,000
Accounting Standards Update 2016-09, Forfeiture Rate Component [Member] \| Accounting Standards Update 2016-09 [Member] \| Deferred Income Taxes [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption			$ (2,100)