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Commitments and Contingencies Letters of Credit Narrative (Details) - Orbitz - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Jun. 30, 2015 | Jun. 30, 2015 | Jun. 30, 2014 | Dec. 31, 2014 | Mar. 25, 2013
Letters of Credit [Line Items] |  |  |  |  |
Letters of Credit Fees | $ 0.1 | $ 0.1 | $ 0.2 | $ 0.3 |
Revolver, maximum borrowing capacity |  |  |  |  | $ 515.0
Revolver, maximum borrowing capacity | 80.0 | 80.0 |  |  |
Line Of Credit Facility Letters of Credit Maximum | 55.0 | 55.0 |  | 55.0 |
Revolving Credit Facility [Member] |  |  |  |  |
Letters of Credit [Line Items] |  |  |  |  |
Revolver, maximum borrowing capacity |  |  |  | $ 80.0 | $ 80.0
Revolver, maximum borrowing capacity | $ 80.0 | $ 80.0 |  |  |

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- Definition Credit Agreement Original Amount + References No definition available. + Details
Name: | expe_CreditAgreementOriginalAmount
Namespace Prefix: | expe_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Amount of fees incurred during period relating to letters of credits. + References No definition available. + Details
Name: | expe_LettersOfCreditFees
Namespace Prefix: | expe_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Letters of Credit [Line Items] + References No definition available. + Details
Name: | expe_LettersOfCreditLineItems
Namespace Prefix: | expe_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The amount of letters of that can be issued under the revolving credit facility. + References No definition available. + Details
Name: | expe_LineOfCreditFacilityLettersOfCreditMaximum
Namespace Prefix: | expe_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- 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 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 210.5-02.19(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

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |