XML 133 R111.htm IDEA: XBRL DOCUMENT
v3.22.0.1

Financial risk management - Interest rate risk (Details) - Interest rate risk - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020
Fixed interest rate |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Long-term debt | $ 2,158,192 | $ 2,140,089
Reasonably possible change in risk variable, percent | 1.00% |
Reasonably possible change in risk variable, impact on debt | $ 155,100 | 185,200
Variable interest rate |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Long-term debt | 0 | 223,283
Unsecured notes | Fixed interest rate |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Long-term debt | 1,981,199 | 1,979,125
Other limited recourse debt facilities | Fixed interest rate |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Long-term debt | 176,993 | 160,964
Geismar 3 construction facility | Variable interest rate |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Long-term debt | 0 | 176,335
Egypt limited recourse debt facilities | Variable interest rate |  |
Disclosure of financial instruments by type of interest rate [line items] |  |
Long-term debt | $ 0 | $ 46,948

X
- 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
Name: | ifrs-full_DisclosureOfFinancialInstrumentsByTypeOfInterestRateLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of risk exposure associated with financial instruments with a shared characteristic that identifies a concentration of risks. [Refer: Financial instruments, class [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2021-01-01 -Paragraph B8 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2021-en-r&anchor=para_B8_c&doctype=Appendix&subtype=B -URIDate 2021-03-24 + Details
Name: | ifrs-full_RiskExposureAssociatedWithInstrumentsSharingCharacteristic
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

X
- Definition Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Change In Risk Variable, Debt + References No definition available. + Details
Name: | mx_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariableDebt
Namespace Prefix: | mx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Change In Risk Variable, Percent + References No definition available. + Details
Name: | mx_SensitivityAnalysisForTypesOfMarketRiskReasonablyPossibleChangeInRiskVariablePercent
Namespace Prefix: | mx_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | ifrs-full_TypesOfRisksAxis=ifrs-full_InterestRateRiskMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | ifrs-full_TypesOfInterestRatesAxis=ifrs-full_FloatingInterestRateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=mx_UnsecuredDebt1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=mx_OtherLimitedRecourseDebtFacilitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=mx_Geismar3ConstructionFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=mx_EgyptLimitedRecourseDebtFacilitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |