v2.4.1.9

RELATED PARTY TRANSACTIONS (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2014
Related Party Transactions [Abstract]
Ownership interest held by each of the Company and Expedia in aircraft (as a percent)		50.00%iaci_PercentageofOwnershipInterestHeldEachbyEntityandbyRelatedPartyinAircraftEmployingFlightCrew
IAC's total purchase price and refurbish costs in another aircraft	$ 25us-gaap_PaymentsToAcquireOtherPropertyPlantAndEquipment
Ownership interest held by each of the Company and Expedia in an entity employing aircraft flight crew (as a percent)	50.00%iaci_PercentageOfOwnershipInterestHeldEachByEntityAndByRelatedPartyInAnotherEntityEmployingFlightCrew

X

- Definition

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

+ References

No definition available.

+ Details

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

X

- Definition

Represents the percentage of the total purchase price of an aircraft paid by both the Company and a related party.

+ References

No definition available.

+ Details

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

X

- Definition

The cash outflow for acquisition of or capital improvements of property, plant and equipment, used to produce goods or deliver services, and not otherwise defined in the taxonomy.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 13

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585

+ Details

Name:	us-gaap_PaymentsToAcquireOtherPropertyPlantAndEquipment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

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