Represents the applicable margin added to the variable rate of the debt instrument.

Name:	pcln_DebtInstrumentApplicableMarginOverVariableRate
Namespace Prefix:	pcln
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

This element represents the term related to a revolving credit facility.

+ Details

Name:	pcln_LineOfCreditFacilityCommittedPeriod
Namespace Prefix:	pcln
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

- Definition

This element represents the maximum amount of letters of credit that can be issued under the terms of the revolving credit facility.

+ Details

Name:	pcln_LineOfCreditFacilityRevolvingCreditMaximumAmountOfLetterOfCreditToBeIssued
Namespace Prefix:	pcln
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Represents the borrowing capacity of the line of credit facility which was terminated.

+ Details

Name:	pcln_LineOfCreditFacilityTerminatedAmount
Namespace Prefix:	pcln
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate
Namespace Prefix:	us-gaap
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

+ Details

Name:	us-gaap_DebtInstrumentDescriptionOfVariableRateBasis
Namespace Prefix:	us-gaap
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

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.

+ Details

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

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

+ Details

Name:	us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(b),22(b))

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

+ Details

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Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Description of the interest rate for the amounts borrowed under the credit facility, including the terms and the method for determining the interest rate (for example, fixed or variable, LIBOR plus a percentage, increasing rate, timing of interest rate resets, remarketing provisions).

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 129

-Paragraph 2, 4

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(b),22(b))

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

+ Details

Name:	us-gaap_LineOfCreditFacilityInterestRateDescription
Namespace Prefix:	us-gaap
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

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Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

+ Details

Name:	us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage
Namespace Prefix:	us-gaap
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

DEBT (Details) (USD $)		1 Months Ended			1 Months Ended						1 Months Ended
DEBT (Details) (USD $)	Oct. 31, 2011	Oct. 31, 2011 New credit facility 2011 Revolving Credit Facility Federal funds rate	Sep. 30, 2007 Federal funds rate Minimum 2007 Revolving credit facility	Sep. 30, 2007 Federal funds rate Maximum 2007 Revolving credit facility	Sep. 30, 2007 Federal funds rate 2007 Revolving credit facility	Oct. 31, 2011 New credit facility 2011 Revolving Credit Facility LIBOR	Oct. 31, 2011 New credit facility 2011 Revolving Credit Facility LIBOR Minimum	Oct. 31, 2011 New credit facility 2011 Revolving Credit Facility LIBOR Maximum	Sep. 30, 2007 LIBOR Minimum 2007 Revolving credit facility	Sep. 30, 2007 LIBOR Maximum 2007 Revolving credit facility	Sep. 30, 2007 LIBOR 2007 Revolving credit facility	Oct. 31, 2011 New credit facility 2011 Revolving Credit Facility Maximum	Sep. 30, 2007 Maximum 2007 Revolving credit facility	Oct. 31, 2011 New credit facility 2011 Revolving Credit Facility Minimum	Sep. 30, 2007 Minimum 2007 Revolving credit facility	Sep. 30, 2007 2007 Revolving credit facility Years	Sep. 30, 2011 2007 Revolving credit facility	Dec. 31, 2010 2007 Revolving credit facility	Nov. 07, 2011 New credit facility 2011 Revolving Credit Facility	Oct. 31, 2011 New credit facility 2011 Revolving Credit Facility Years
Revolving Credit Facility
Revolving credit facility, commitment fees at the applicable rate												0.25%	0.375%	0.10%	0.25%
Basis spread on variable rate		0.50%			0.50%
Applicable margin added to base rate (as a percent)			0.25%	0.75%			1.00%	1.50%	1.25%	1.75%
Variable rate basis		Federal funds rate			Federal funds rate	LIBOR					LIBOR
Revolving credit facility																$ 175,000,000
Revolving credit facility																				1,000,000,000
Period of revolving credit facility (in years)																5				5
Interest rate terms																Borrowings under the revolving credit facility will bear interest, at the Company's option, at a rate per annum equal to the greater of (a) JPMorgan Chase Bank, National Association's prime lending rate and (b) the federal funds rate plus 1/2 of 1%, plus an applicable margin ranging from 0.25% to 0.75%; or at an adjusted LIBOR for the interest period in effect for such borrowing plus an applicable margin ranging from 1.25% to 1.75%.
Letters of credit, maximum amount issuable under credit facility																	50,000,000			100,000,000
Letters of credit issued by the company under revolving credit facility																	1,800,000	1,600,000	1,800,000
Borrowing capacity of the terminated line of credit facility	$ 175,000,000