v2.4.0.6

CONTINGENCIES (Details) | 12 Months Ended
--- | ---
Dec. 31, 2011 lawsuit
CONTINGENCIES |
Minimum number of lawsuits that could have material impact on the liquidity, results of operations, or financial condition | 1

X
- Details
Name: | iaci_ContingenciesDisclosureAbstract
Namespace Prefix: | iaci_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the minimum number of lawsuits or other contingencies that could have a material impact on the liquidity, results of operations, or financial condition of the entity. + References No definition available. + Details
Name: | iaci_LossContingencyMinimumNumberOfLawsuitsThatCouldHaveAMaterialImpact
Namespace Prefix: | iaci_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration