XML 87 R65.htm IDEA: XBRL DOCUMENT
v3.22.4

Property, plant and equipment - Owned assets (Details) $ in Thousands, t in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 USD ($) t | Dec. 31, 2021 USD ($)
Reconciliation of changes in property, plant and equipment [abstract] |  |
Value at beginning of period | $ 3,075,198 |
Value at end of period | 3,398,805 | $ 3,075,198
Buildings, plant installations and machinery |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Value at beginning of period | 2,277,224 |
Value at end of period | 2,173,129 | 2,277,224
Plants under construction |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Value at beginning of period | 561,860 |
Value at end of period | $ 1,001,888 | 561,860
Plants under construction | Methanol plant in Geismar, Louisiana |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Owned asset (in tonnes) | t | 1.8 |
Ocean-going vessels |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Value at beginning of period | $ 203,254 |
Value at end of period | 191,557 | 203,254
Other |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Value at beginning of period | 32,860 |
Value at end of period | 32,231 | 32,860
Cost |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Value at beginning of period | 5,849,255 | 5,614,798
Additions | 582,399 | 273,032
Disposals and other | 47,819 | 38,575
Value at end of period | 6,383,835 | 5,849,255
Cost | Buildings, plant installations and machinery |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Value at beginning of period | 4,908,492 | 4,861,912
Additions | 140,326 | 66,802
Disposals and other | 47,819 | 20,222
Value at end of period | 5,000,999 | 4,908,492
Cost | Plants under construction |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Value at beginning of period | 561,860 | 386,905
Additions | 440,028 | 174,955
Disposals and other | 0 | 0
Value at end of period | 1,001,888 | 561,860
Cost | Plants under construction | Methanol plant in Geismar, Louisiana |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Owned assets, capitalized interest | 94,000 | 54,000
Cost | Ocean-going vessels |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Value at beginning of period | 240,525 | 210,099
Additions | 342 | 30,426
Disposals and other | 0 | 0
Value at end of period | 240,867 | 240,525
Cost | Other |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Value at beginning of period | 138,378 | 155,882
Additions | 1,703 | 849
Disposals and other | 0 | 18,353
Value at end of period | 140,081 | 138,378
Accumulated depreciation |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Value at beginning of period | (2,774,057) | (2,562,738)
Disposals and other | (51,430) | (38,575)
Depreciation | 262,403 | 249,894
Value at end of period | (2,985,030) | (2,774,057)
Accumulated depreciation | Buildings, plant installations and machinery |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Value at beginning of period | (2,631,268) | (2,413,176)
Disposals and other | (51,430) | (20,222)
Depreciation | 248,032 | 238,314
Value at end of period | (2,827,870) | (2,631,268)
Accumulated depreciation | Plants under construction |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Value at beginning of period | 0 | 0
Disposals and other | 0 | 0
Depreciation | 0 | 0
Value at end of period | 0 | 0
Accumulated depreciation | Ocean-going vessels |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Value at beginning of period | (37,271) | (27,926)
Disposals and other | 0 | 0
Depreciation | 12,039 | 9,345
Value at end of period | (49,310) | (37,271)
Accumulated depreciation | Other |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Value at beginning of period | (105,518) | (121,636)
Disposals and other | 0 | (18,353)
Depreciation | 2,332 | 2,235
Value at end of period | $ (107,850) | $ (105,518)

X
- Definition The amount of additions to property, plant and equipment other than those acquired through business combinations. [Refer: Business combinations [member]; Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2022-03-24 -Paragraph 73 -Subparagraph e -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2022-en-r&anchor=para_73_e_i&doctype=Standard -URIDate 2022-03-24 + Details
Name: | ifrs-full_AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipment
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount of depreciation of property, plant and equipment. [Refer: Depreciation and amortisation expense; Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2022-03-24 -Paragraph 73 -Subparagraph e -Clause vii -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2022-en-r&anchor=para_73_e_vii&doctype=Standard -URIDate 2022-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2022-03-24 -Paragraph 75 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2022-en-r&anchor=para_75_a&doctype=Standard -URIDate 2022-03-24 + Details
Name: | ifrs-full_DepreciationPropertyPlantAndEquipment
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Definition The decrease in property, plant and equipment resulting from disposals. [Refer: Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2022-03-24 -Paragraph 73 -Subparagraph e -Clause ii -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2022-en-r&anchor=para_73_e_ii&doctype=Standard -URIDate 2022-03-24 + Details
Name: | ifrs-full_DisposalsPropertyPlantAndEquipment
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The amount of tangible assets that: (a) are held for use in the production or supply of goods or services, for rental to others, or for administrative purposes; and (b) are expected to be used during more than one period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2022-03-24 -Paragraph 73 -Subparagraph e -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2022-en-r&anchor=para_73_e&doctype=Standard -URIDate 2022-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph 54 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_54_a&doctype=Standard -URIDate 2022-03-24 + Details
Name: | ifrs-full_PropertyPlantAndEquipment
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | ifrs-full_ReconciliationOfChangesInPropertyPlantAndEquipmentAbstract
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Plant, processing capacity, mass + References No definition available. + Details
Name: | mx_PlantProcessingCapacityMass
Namespace Prefix: | mx_
Data Type: | dtr-types:massItemType
Balance Type: | na
Period Type: | instant

X
- Definition Property, plant and equipment, capitalized interest + References No definition available. + Details
Name: | mx_PropertyPlantAndEquipmentCapitalizedInterest
Namespace Prefix: | mx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=mx_BuildingsPlantInstallationsAndMachineryMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=ifrs-full_ConstructionInProgressMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | mx_RealEstateAndAccumulatedDepreciationDescriptionOfProperty1Axis=mx_MethanolPlantInGeismarLouisianaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=ifrs-full_ShipsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=ifrs-full_OtherPropertyPlantAndEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis=ifrs-full_GrossCarryingAmountMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis=ifrs-full_AccumulatedDepreciationAndAmortisationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |