v2.4.0.6

RELATED PARTY TRANSACTIONS (Details)	Dec. 31, 2011
RELATED PARTY TRANSACTIONS
Ownership interest held by each of the Company and Expedia in aircraft (as a percent)	50.00%
Ownership interest held by each of the Company and Expedia in an entity employing aircraft flight crew (as a percent)	50.00%

X

- Definition

Represents the percentage of ownership interest in an aircraft that is held by the entity and a similar percentage of ownership that is held by the related party.

+ References

No definition available.

+ Details

Name:	iaci_PercentageOfOwnershipInterestHeldEachByEntityAndByRelatedPartyInAircraft
Namespace Prefix:	iaci_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Represents the percentage of ownership interest in another entity employing aircraft flight crew that is held by the reporting entity and a similar percentage of ownership that is held by the related party.

+ References

No definition available.

+ Details

Name:	iaci_PercentageOfOwnershipInterestHeldEachByEntityAndByRelatedPartyInAnotherEntityEmployingFlightCrew
Namespace Prefix:	iaci_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	us-gaap_RelatedPartyTransactionsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration