XML 124 R101.htm IDEA: XBRL DOCUMENT
v3.20.4

Income and other taxes - Change in deferred income tax liabilities (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Net |  |
Net, beginning of period | $ (161,206) | $ (217,153)
Deferred income tax recovery included in net income | 87,301 | 34,335
Deferred income tax recovery (expense) included in other comprehensive income | (2,325) | 22,049
Other | 362 | (437)
Net, end of period | (75,868) | (161,206)
Deferred tax assets |  |
Deferred tax assets, beginning of period | 111,614 | 60,065
Deferred income tax recovery included in net income | 28,243 | 28,875
Deferred income tax recovery (expense) included in other comprehensive income | (2,333) | 21,871
Other | 0 | 803
Deferred tax assets, end of period | 137,524 | 111,614
Deferred tax liabilities |  |
Deferred tax liabilities, beginning of period | (272,820) | (277,218)
Deferred income tax recovery included in net income | 59,058 | 5,460
Deferred income tax recovery (expense) included in other comprehensive income | 8 | 178
Other | 362 | (1,240)
Deferred tax liabilities, end of period | (213,392) | (272,820)
Previously stated |  |
Net |  |
Net, beginning of period | (161,206) | (221,682)
Net, end of period |  | (161,206)
Deferred tax assets |  |
Deferred tax assets, beginning of period | 111,614 | 59,532
Deferred tax assets, end of period |  | 111,614
Deferred tax liabilities |  |
Deferred tax liabilities, beginning of period | (272,820) | (281,214)
Deferred tax liabilities, end of period |  | (272,820)
Adjustment on adoption of IFRS 16 |  |
Net |  |
Net, beginning of period | 0 | 4,529
Net, end of period |  | 0
Deferred tax assets |  |
Deferred tax assets, beginning of period | 0 | 533
Deferred tax assets, end of period |  | 0
Deferred tax liabilities |  |
Deferred tax liabilities, beginning of period | $ 0 | 3,996
Deferred tax liabilities, end of period |  | $ 0

X
- Definition The amounts of income taxes recoverable in future periods in respect of: (a) deductible temporary differences; (b) the carryforward of unused tax losses; and (c) the carryforward of unused tax credits. [Refer: Temporary differences [member]; Unused tax credits [member]; Unused tax losses [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2020-01-01 -Paragraph 81 -Subparagraph g -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2020-en-r&anchor=para_81_g_i&doctype=Standard -URIDate 2020-01-01 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 54 -Subparagraph o -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_54_o&doctype=Standard -URIDate 2020-01-01 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 56 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_56&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_DeferredTaxAssets
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of tax expense or income relating to changes in deferred tax liabilities and deferred tax assets, recognised in profit or loss. [Refer: Deferred tax assets; Deferred tax expense (income); Deferred tax liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2020-01-01 -Paragraph 81 -Subparagraph g -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2020-en-r&anchor=para_81_g_ii&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_DeferredTaxExpenseIncomeRecognisedInProfitOrLoss
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amounts of income taxes payable in future periods in respect of taxable temporary differences. [Refer: Temporary differences [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2020-01-01 -Paragraph 81 -Subparagraph g -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2020-en-r&anchor=para_81_g_i&doctype=Standard -URIDate 2020-01-01 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 54 -Subparagraph o -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_54_o&doctype=Standard -URIDate 2020-01-01 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 56 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_56&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_DeferredTaxLiabilities
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of deferred tax liabilities or assets. [Refer: Deferred tax liabilities; Deferred tax assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2020-01-01 -Paragraph 81 -Subparagraph g -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2020-en-r&anchor=para_81_g_i&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_DeferredTaxLiabilityAsset
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

X
- Definition Deferred Tax Assets [Abstract] + References No definition available. + Details
Name: | mx_DeferredTaxAssetsAbstract
Namespace Prefix: | mx_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Deferred Tax Assets, Deferred Tax Expense (Income) Recognized In Profit Or Loss + References No definition available. + Details
Name: | mx_DeferredTaxAssetsDeferredTaxExpenseIncomeRecognizedInProfitOrLoss
Namespace Prefix: | mx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Deferred Tax Assets, Income Tax Relating To Components Of Other Comprehensive Income + References No definition available. + Details
Name: | mx_DeferredTaxAssetsIncomeTaxRelatingToComponentsOfOtherComprehensiveIncome
Namespace Prefix: | mx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Deferred Tax Assets, Other Increase (Decrease) + References No definition available. + Details
Name: | mx_DeferredTaxAssetsOtherIncreaseDecrease
Namespace Prefix: | mx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Deferred Tax Expense (Income) Recognised In Other Comprehensive Income (Loss) + References No definition available. + Details
Name: | mx_DeferredTaxExpenseIncomeRecognisedInOtherComprehensiveIncomeLoss
Namespace Prefix: | mx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Deferred Tax Liabilities [Abstract] + References No definition available. + Details
Name: | mx_DeferredTaxLiabilities1Abstract
Namespace Prefix: | mx_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Deferred Tax Liabilities, Deferred Tax Expense (Income) Recognized In Profit Or Loss + References No definition available. + Details
Name: | mx_DeferredTaxLiabilitiesDeferredTaxExpenseIncomeRecognizedInProfitOrLoss
Namespace Prefix: | mx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Deferred Tax Liabilities, Income Tax Relating To Components Of Other Comprehensive Income + References No definition available. + Details
Name: | mx_DeferredTaxLiabilitiesIncomeTaxRelatingToComponentsOfOtherComprehensiveIncome
Namespace Prefix: | mx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Deferred Tax Liabilities, Other Increase (Decrease) + References No definition available. + Details
Name: | mx_DeferredTaxLiabilitiesOtherIncreaseDecrease
Namespace Prefix: | mx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Other Increase (Decrease) In Deferred Tax Liability (Asset) + References No definition available. + Details
Name: | mx_OtherIncreaseDecreaseInDeferredTaxLiabilityAsset
Namespace Prefix: | mx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | ifrs-full_RetrospectiveApplicationAndRetrospectiveRestatementAxis=ifrs-full_PreviouslyStatedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_RetrospectiveApplicationAndRetrospectiveRestatementAxis=mx_IncreaseDecreaseDueToApplicationOfIFRS16Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |