XML 63 R56.htm IDEA: XBRL DOCUMENT
v3.19.3

CONTINGENCIES (Details) | Jun. 13, 2019 plaintiff | Aug. 31, 2018 plaintiff | Aug. 14, 2018 USD ($) plaintiff | Sep. 30, 2019 USD ($) lawsuit
--- | --- | --- | --- | ---
Loss Contingencies [Line Items] |  |  |  |
Loss contingency reserve | $ |  |  |  | $ 0
Number of lawsuits with possible material impact (one or more) | lawsuit |  |  |  | 1
Tinder Optionholder Litigation |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Number of plaintiffs | 6 | 6 | 10 |
Number of plaintiffs who filed a notice of discontinuance of their claims without prejudice |  | 4 |  |
Number of plaintiffs that were granted motion to dismiss merger-related claim for breach of contract | 2 |  |  |
Tinder Optionholder Litigation | Pending Litigation |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Damages sought | $ |  |  | $ 2,000,000,000 |

X
- Definition Loss Contingency, Number Of Plaintiffs Who Filed A Notice Of Discontinuance Of Their Claims Without Prejudice + References No definition available. + Details
Name: | iac_LossContingencyNumberOfPlaintiffsWhoFiledANoticeOfDiscontinuanceOfTheirClaimsWithoutPrejudice
Namespace Prefix: | iac_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Loss Contingency, Number of Plaintiffs Granted Motion to Dismiss Merger-Related Claim for Breach of Contract + References No definition available. + Details
Name: | iac_LossContingencyNumberofPlaintiffsGrantedMotiontoDismissMergerRelatedClaimforBreachofContract
Namespace Prefix: | iac_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of Lawsuits with Possible Material Impact + References No definition available. + Details
Name: | iac_NumberofLawsuitswithPossibleMaterialImpact
Namespace Prefix: | iac_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_LossContingenciesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of loss contingency liability. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=118942415&loc=d3e14326-108349 + Details
Name: | us-gaap_LossContingencyAccrualAtCarryingValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The value (monetary amount) of the award the plaintiff seeks in the legal matter. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118942415&loc=d3e14557-108349 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118942415&loc=d3e14435-108349 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=118942415&loc=d3e14326-108349 + Details
Name: | us-gaap_LossContingencyDamagesSoughtValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Number of plaintiffs that have filed claims pertaining to a loss contingency. + References No definition available. + Details
Name: | us-gaap_LossContingencyNumberOfPlaintiffs
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_LitigationCaseAxis=iac_TinderOptionholderLitigationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LitigationStatusAxis=us-gaap_PendingLitigationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |