v2.4.0.8

ORGANIZATION (Details) | 12 Months Ended
--- | ---
Dec. 31, 2013 visit brand country
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Minimum number of brands and products owned by the company | 150
More than 1 billion monthly visits to company websites | 1,000,000,000
Number of countries where the company has consumer audiences | 100

X
- Definition The number of brands and products owned by the entity. + References No definition available. + Details
Name: | iaci_NumberOfBrandsAndProducts
Namespace Prefix: | iaci_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of Monthly Visits to Company Websites + References No definition available. + Details
Name: | iaci_NumberOfMonthlyVisitsToCompanyWebsites
Namespace Prefix: | iaci_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of countries in which the entity operates as of balance sheet date. + References No definition available. + Details
Name: | us-gaap_NumberOfCountriesInWhichEntityOperates
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration