XML 74 R63.htm IDEA: XBRL DOCUMENT v3.25.2

COMMITMENTS AND CONTINGENCIES - Prepayment agreement (Details) - Auramet International LLC ("Auramet") - Prepayment Agreement - Guarantee Obligation - Precious metal - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Other Commitments
Net proceeds from sales on a Supplier Advance Basis	$ 13.5	$ 0.0	$ 38.2	$ 4.8
Revenue from sales on a Supplier Advance Basis	8.4	$ 2.0	38.2	$ 4.8
Remaining net proceeds recorded as deferred revenue	$ 0.0		$ 0.0

X

- Definition

The cash inflow from sale of precious metals under a Supplier Advance Basis.

+ References

No definition available.

+ Details

Name:	mux_ProceedsFromSaleOfPreciousMetalsFromSupplierAdvanceBasis
Namespace Prefix:	mux_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

The revenue from sale of precious metals under a Supplier Advance Basis.

+ References

No definition available.

+ Details

Name:	mux_RevenueFromSaleOfPreciousMetalsFromSupplierAdvanceBasis
Namespace Prefix:	mux_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount of deferred income and obligation to transfer product and service to customer for which consideration has been received or is receivable, classified as current.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(20))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

+ Details

Name:	us-gaap_DeferredRevenueCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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_OtherCommitmentsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	srt_MajorCustomersAxis=mux_AurametInternationalLLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_TypeOfArrangementAxis=mux_PrepaymentAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_LossContingenciesByNatureOfContingencyAxis=us-gaap_GuaranteeObligationsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ProductOrServiceAxis=us-gaap_ProductMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: