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Income tax (Details 5) $ in Millions	Jun. 30, 2018 ARS ($)
Income Tax
2019	$ 49
2020	35
2021	33
2022	9
2023	2,875
Do not expire	1,404
Total	$ 4,405

No definition available.

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Refers to the amount of operating income tax loss carryforwards.

No definition available.

Name:	irsa_OperatingIncomeTaxLossCarryforwards
Namespace Prefix:	irsa_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Refers to the amount of operating loss carryforwards five.

No definition available.

Name:	irsa_OperatingLossCarryforwardsFive
Namespace Prefix:	irsa_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Refers to the amount of operating loss carryforwards foure.

No definition available.

Name:	irsa_OperatingLossCarryforwardsFoure
Namespace Prefix:	irsa_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Refers to the amount of operating loss carryforwards one.

No definition available.

Name:	irsa_OperatingLossCarryforwardsOne
Namespace Prefix:	irsa_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Refers to the amount of operating loss carryforward six.

No definition available.

Name:	irsa_OperatingLossCarryforwardsSix
Namespace Prefix:	irsa_
Data Type:	xbrli:monetaryItemType
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Period Type:	instant

Refers to the amount of operating loss carryforwards three.

No definition available.

Name:	irsa_OperatingLossCarryforwardsThree
Namespace Prefix:	irsa_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Refers to the amount of operating loss carryforwards two.

No definition available.

Name:	irsa_OperatingLossCarryforwardsTwo
Namespace Prefix:	irsa_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant