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 | $ 25 us-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