Accumulated Other Comprehensive Loss (Parenthetical) (Detail) - 2.5% Senior Notes Due 2022 - USD ($) $ in Millions		6 Months Ended
Dec. 31, 2015	Jun. 30, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]
Foreign currency translation losses, net of tax	$ 1	$ 9
Foreign currency translation losses, before tax	$ 2	$ 14

Cumulative translation adjustment in other comprehensive income reflecting gains or losses on foreign currency derivatives those are designated as, and are effective as, hedges of a net investment in a foreign entity, before tax effect.

No definition available.

Name:	expe_CumulativeTranslationAdjustmentForNetInvestmentHedgeBeforeTax
Namespace Prefix:	expe_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration