Debt - Additional Information (Detail) (USD $)	6 Months Ended
Jun. 30, 2014	Dec. 31, 2013
Credit Facility
Debt Instrument [Line Items]
Unsecured revolving credit facility	$ 1,000,000,000
Line of credit facility, expiration date	2017-11
Credit facility borrowings outstanding	0	0
Interest, on drawn amount	LIBOR plus 150 basis points
Commitment fee on undrawn amounts	0.20%
Letters of credit issued under the credit facility	19,000,000	19,000,000
Credit Facility \| London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Basis points added to LIBOR rate	1.50%
5.95% Senior Notes Due 2020
Debt Instrument [Line Items]
Senior unsecured notes principal amount	750,000,000
Senior notes, maturity date	2020-08
Senior notes, interest rate	5.95%
Senior notes redemption price percentage at the option of company	100.00%
Redemption at option of Company	We may redeem the 5.95% Notes at a redemption price of 100% of the principal plus accrued interest, plus a "make-whole" premium, in whole or in part.
Senior notes issued price percentage	99.893%
Fair value of senior notes	848,000,000	816,000,000
7.456% Senior Notes Due 2018
Debt Instrument [Line Items]
Senior unsecured notes principal amount	500,000,000
Senior notes, maturity date	2018-08
Senior notes, interest rate	7.456%
Senior notes redemption price percentage at the option of company	100.00%
Redemption at option of Company	At any time Expedia may redeem the 7.456% Notes at a redemption price of 100% of the principal plus accrued interest, plus a "make-whole" premium, in whole or in part.
Fair value of senior notes	594,000,000	587,000,000
Senior Notes
Debt Instrument [Line Items]
Accrued interest related to senior notes	$ 31,000,000	$ 31,000,000

Debt Instruments Maturity Date Month and Year

No definition available.

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- Definition

Line of Credit Facility Expiration Dates

+ References

No definition available.

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- Definition

Senior Notes Issued Price Percentage

+ References

No definition available.

+ Details

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- Definition

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

+ References

No definition available.

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- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 2

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- Definition

Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 10

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

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-Subparagraph (SX 210.5-02.22(a)(1))

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- Definition

Description of debt redemption features under terms of the debt agreement.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 470

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- Definition

Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

+ References

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- Definition

Amount of interest payable on debt, including, but not limited to, trade payables.

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-Name Accounting Standards Codification

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- Definition

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

+ References

No definition available.

+ Details

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- Definition

Amount borrowed under the credit facility as of the balance sheet date.

+ References

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-Name Regulation S-X (SX)

-Number 210

-Section 02

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- 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 Accounting Standards Codification

-Topic 210

-SubTopic 10

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-Paragraph 1

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

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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

+ Details

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- Definition

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

+ References

No definition available.

+ Details

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