Borrowings Net of Prepaid Transaction Cost

No definition available.

Name:	iag_BorrowingsNetofPrepaidTransactionCost
Namespace Prefix:	iag_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The interest rate on borrowings. [Refer: Borrowings]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IFRS
-Number 7
-IssueDate 2025-01-01
-Paragraph 7
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2025-en-r&anchor=para_7&doctype=Standard
-URIDate 2025-03-27

+ Details

Name:	ifrs-full_BorrowingsInterestRate
Namespace Prefix:	ifrs-full_
Data Type:	dtr-2022:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The current portion of non-current borrowings. [Refer: Borrowings]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Note Expiry date 2027-01-01
-Name IAS
-Number 1
-IssueDate 2025-01-01
-Paragraph 55
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2025-en-b&anchor=para_55&doctype=Standard
-URIDate 2025-03-27

+ Details

Name:	ifrs-full_CurrentPortionOfLongtermBorrowings
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

+ References

No definition available.

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The non-current portion of non-current borrowings. [Refer: Borrowings]

+ References

+ Details

Name:	ifrs-full_LongtermBorrowings
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	ifrs-full_BorrowingsByNameAxis=iag_CreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_BorrowingsByNameAxis=iag_A575PercentSeniorSecuredNotesDue2028Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_TypesOfInterestRatesAxis=ifrs-full_FixedInterestRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_BorrowingsByNameAxis=iag_SevenPercentSeniorSecuredNotesDue2025WithEmbeddedDerivativesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_BorrowingsByNameAxis=iag_CaterpillarFinanceCorporationEquipmentLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Long-term Debt and Credit Facility - Schedule of Long Term Debt (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024	Sep. 23, 2020
Disclosure of detailed information about borrowings [line items]
Borrowings	$ 649.8	$ 1,028.9
Current portion of long-term debt	1.0	1.0
Non-current portion of long-term debt	648.8	1,027.9
Credit facility
Disclosure of detailed information about borrowings [line items]
Borrowings	200.0	220.0
5.75% senior notes
Disclosure of detailed information about borrowings [line items]
Borrowings	$ 448.8	448.4
5.75% senior notes \| Fixed interest rate
Disclosure of detailed information about borrowings [line items]
Interest rate	5.75%		5.75%
Second lien term loan
Disclosure of detailed information about borrowings [line items]
Borrowings	$ 0.0	358.4
Equipment loans
Disclosure of detailed information about borrowings [line items]
Borrowings	$ 1.0	$ 2.1