XML 123 R81.htm IDEA: XBRL DOCUMENT v3.20.1

Other long-term liabilities - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Subclassifications of assets, liabilities and equities [abstract]
Undiscounted amount of estimated cash flows required to settle liabilities	$ 38.1	$ 37.6

X

- References

No definition available.

+ Details

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

X

- Definition

Undiscounted Estimated Cash Flows Required To Settle Liabilities

+ References

No definition available.

+ Details

Name:	mx_UndiscountedEstimatedCashFlowsRequiredToSettleLiabilities
Namespace Prefix:	mx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration