Debt Instrument, Frequency of Periodic Payments

No definition available.

Name:	iren_DebtInstrumentFrequencyOfPeriodicPayments
Namespace Prefix:	iren_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Number Of Financing Agreements Entered Into

+ References

No definition available.

+ Details

Name:	iren_NumberOfFinancingAgreementsEnteredInto
Namespace Prefix:	iren_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Face (par) amount of debt instrument at time of issuance.

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Balance Type:	credit
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

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Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- 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.

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+ Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Period between issuance and maturity of debt instrument, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of unused borrowing capacity under the long-term financing arrangement that is available to the entity as of the balance sheet date.

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- Details

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Namespace Prefix:
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Balance Type:
Period Type:

- Details

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Balance Type:
Period Type:

- Details

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Balance Type:
Period Type:

- Details

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Namespace Prefix:
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Balance Type:
Period Type:

- Details

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Namespace Prefix:
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Balance Type:
Period Type:

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Period Type:

Debt - Narrative (Details) $ in Millions	1 Months Ended	3 Months Ended
Debt - Narrative (Details) $ in Millions	Aug. 31, 2026 USD ($) payment_Installment	Sep. 30, 2026 USD ($) agreement	Jun. 30, 2026 USD ($)
Debt Instrument [Line Items]
Total principal of debt		$ 10,041	$ 7,706
Secured Debt
Debt Instrument [Line Items]
Number of financing agreements entered into \| agreement		2
DDTL Facility \| Non-recourse debt
Debt Instrument [Line Items]
Aggregate principal amount		$ 413
Unused borrowing capacity, amount		1,132
USPP Senior Notes \| Non-recourse debt
Debt Instrument [Line Items]
Aggregate principal amount		1,575
Unused borrowing capacity, amount		525
GPU Financing 2.0 \| Secured Debt
Debt Instrument [Line Items]
Aggregate principal amount	$ 2,400	2,447
Unused borrowing capacity, amount		$ 1,500
Stated interest rate	9.00%	9.00%
Debt instrument, term	30 months
Total principal of debt		$ 947
GPU Financing 3.0 \| Secured Debt
Debt Instrument [Line Items]
Aggregate principal amount	$ 363	$ 363
Stated interest rate	9.51%	9.51%
Frequency of periodic payments \| payment_Installment	36
Total principal of debt		$ 363