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

The weighted average exercise price of other equity instruments (ie other than share options) granted in a share-based payment arrangement. [Refer: Weighted average [member]]

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IFRS
-Number 2
-IssueDate 2023-01-01
-Paragraph 45
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2023-en-r&anchor=para_45&doctype=Standard
-URIDate 2023-03-23

Name:	ifrs-full_WeightedAverageExercisePriceOfOtherEquityInstrumentsGrantedInSharebasedPaymentArrangement2019
Namespace Prefix:	ifrs-full_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	duration

Expected Dividend As Percentage, Other Equity Instruments Granted

No definition available.

Name:	mx_ExpectedDividendAsPercentageOtherEquityInstrumentsGranted
Namespace Prefix:	mx_
Data Type:	dtr-types1:percentItemType
Balance Type:	na
Period Type:	duration

Expected Forfeiture As Percentage, Other Equity Instruments Granted

No definition available.

Name:	mx_ExpectedForfeitureAsPercentageOtherEquityInstrumentsGranted
Namespace Prefix:	mx_
Data Type:	dtr-types1:percentItemType
Balance Type:	na
Period Type:	duration

Expected Volatility, Other Equity Instruments Granted

No definition available.

Name:	mx_ExpectedVolatilityOtherEquityInstrumentsGranted
Namespace Prefix:	mx_
Data Type:	dtr-types1:percentItemType
Balance Type:	na
Period Type:	duration

Other Equity Instruments Life, Other Equity Instruments Granted

No definition available.

Name:	mx_OtherEquityInstrumentsLifeOtherEquityInstrumentsGranted
Namespace Prefix:	mx_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Risk Free Interest Rate, Other Equity Instruments Granted

No definition available.