Debt - Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 31, 2013	Dec. 31, 2012
Debt Instrument [Line Items]
Accrued interest related to senior notes	$ 10,000,000	$ 31,000,000
Credit Facility
Debt Instrument [Line Items]
Unsecured revolving credit facility	1,000,000,000
Line of credit facility, expiration date	2017-11
Interest, on drawn amount	LIBOR plus 150 basis points
Commitment fee on undrawn amounts	0.20%
Basis points added to LIBOR rate	1.50%
Letters of credit issued under the credit facility	22,000,000	25,000,000
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%
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%
Senior notes redemption price percentage at the option of company	100.00%
Fair value of senior notes	832,000,000	832,000,000
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 holder	100.00%
Redemption at option of holder	Repayable in whole or in part on August 15, 2013, at the option of the holders of such 7.456% Notes, at 100% of the principal amount plus accrued interest
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	$ 599,000,000	$ 598,000,000