Airplane Ownership Interest

No definition available.

Name:	expe_AirplaneOwnershipInterest
Namespace Prefix:	expe_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Combined voting power of outstanding capital stock controlled.

+ References

No definition available.

+ Details

Name:	expe_CombinedVotingPowerOfOSCapitalStock
Namespace Prefix:	expe_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Common Stock Votes Percentage Of Directors To Be Elected

+ References

No definition available.

+ Details

Name:	expe_CommonStockVotesPercentageOfDirectorsToBeElected
Namespace Prefix:	expe_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of Directors Multiple

+ References

No definition available.

+ Details

Name:	expe_NumberOfDirectorsMultiple
Namespace Prefix:	expe_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of shares of TripAdvisor common stock that Liberty purchased from Mr. Diller

+ References

No definition available.

+ Details

Name:	expe_NumberOfSharesSoldInStockSale
Namespace Prefix:	expe_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Net basis in our ownership interest in the plane recorded in long-term investments and other assets

+ References

No definition available.

+ Details

Name:	expe_OwnershipInterestInPlane
Namespace Prefix:	expe_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Percentage of board members to be elected by separate class vote.

+ References

No definition available.

+ Details

Name:	expe_PercentageOfBoardMembersToBeElectedBySeparateClassVote
Namespace Prefix:	expe_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Total cost of shares issued divided by the total number of shares issued.

+ References

No definition available.

+ Details

Name:	expe_StockIssuedDuringPeriodTreasuryStockReissuedAverageCostPerShare
Namespace Prefix:	expe_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.3-04)

-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.29)

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

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 30

-Article 5

+ Details

Name:	us-gaap_CommonStockSharesOutstanding
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 13

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585

+ Details

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

- Definition

Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References

No definition available.

+ Details

Name:	us-gaap_PropertyPlantAndEquipmentUsefulLife
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Details

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

- Definition

Number of treasury shares (units) reissued during the period, excluding reissuance of shares (units) held in treasury used to satisfy equity-based compensation obligations exercised by the holders of such rights. Upon reissuance of shares (units) from treasury, either the common or preferred stock (unit) reissued is outstanding.

+ References

+ Details

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

- Definition

Equity impact of the value of treasury stock (units) reissued during the period, excluding reissuance of shares (units) held in treasury used to satisfy equity-based compensation obligations exercised by the holders of such rights. Upon reissuance of shares (units) from treasury, either the common or preferred stock (unit) reissued is outstanding.

+ References

+ Details

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

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=expe_AirplaneOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=expe_AirplaneTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_FlightEquipmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=expe_LibertyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementClassOfStockAxis=us-gaap_CommonClassBMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementClassOfStockAxis=us-gaap_CommonStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_TitleOfIndividualAxis=us-gaap_BoardOfDirectorsChairmanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Related Party Transactions - Additional Information (Detail) (USD $)	12 Months Ended			0 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 11, 2012
Related Party Transaction [Line Items]
Percentage of board members to be elected by separate class votes	25.00%
Capital expenditures	$ 328,387,000	$ 308,581,000	$ 235,697,000
Stock issued, aggregate value	20,404,000	25,273,000
Liberty
Related Party Transaction [Line Items]
TripAdvisor Stock Sale (number of shares)				4,799,848
Percentage of total number of directors on Board that Liberty Interactive can nominate	20.00%
Number of directors multiple	5
Common stock issued from treasury stock	264,608	467,672
Treasury stock reissued, price per share	$ 77.11	$ 54.04
Stock issued, aggregate value	20,404,000	25,273,000
Aircraft
Related Party Transaction [Line Items]
Ownership interest of airplanes	36,000,000	38,000,000
Airplane One \| Expedia, Inc
Related Party Transaction [Line Items]
Airplane ownership interest	50.00%
Airplane One \| IAC
Related Party Transaction [Line Items]
Airplane ownership interest	50.00%
Airplane Two \| Expedia, Inc
Related Party Transaction [Line Items]
Airplane ownership interest	50.00%
Estimated useful life (in years)		10 years
Capital expenditures		$ 25,000,000
Airplane Two \| IAC
Related Party Transaction [Line Items]
Airplane ownership interest	50.00%
Common stock
Related Party Transaction [Line Items]
Common stock, Shares outstanding	114,267,000	116,886,000
Common stock \| Liberty \| Liberty USA Holdings, LLC.
Related Party Transaction [Line Items]
Common stock, Shares outstanding	10,500,000
Class B Common Stock
Related Party Transaction [Line Items]
Common stock, Shares outstanding	12,800,000	12,800,000
Class B Common Stock \| Liberty \| Liberty USA Holdings, LLC.
Related Party Transaction [Line Items]
Common stock, Shares outstanding	12,800,000
Board of Directors Chairman
Related Party Transaction [Line Items]
Combined voting power	59.00%