XML 94 R71.htm IDEA: XBRL DOCUMENT
v3.20.4

Long-term debt - Narrative (Details) | 12 Months Ended
--- | ---
Dec. 31, 2020 USD ($) vessel semi-annual_payment | Dec. 31, 2019 USD ($)
Disclosure of detailed information about borrowings [line items] |  |
Accretion of deferred financing costs | $ 3,600,000 | $ 3,600,000
Debt instruments issued | 29,430,000 | 29,849,000
Repayments of borrowings | 295,917,000 | 388,216,000
Long-term debt | $ 2,363,372,000 | 1,768,853,000
Egypt limited recourse debt facilities |  |
Disclosure of detailed information about borrowings [line items] |  |
Number of semi-annual principal payments | semi-annual_payment | 24 |
Long-term debt | $ 46,948,000 | 75,165,000
Egypt limited recourse debt facilities | Egypt entity |  |
Disclosure of detailed information about borrowings [line items] |  |
Percentage of gas requirements (greater than) | 70.00% |
Egypt limited recourse debt facilities | Bottom of range | LIBOR |  |
Disclosure of detailed information about borrowings [line items] |  |
Basis spread, percent | 1.60% |
Egypt limited recourse debt facilities | Top of range | LIBOR |  |
Disclosure of detailed information about borrowings [line items] |  |
Basis spread, percent | 1.90% |
Other limited recourse debt facilities |  |
Disclosure of detailed information about borrowings [line items] |  |
Long-term debt | $ 160,964,000 | 158,026,000
Other limited recourse debt facilities | 50% owned subsidiary |  |
Disclosure of detailed information about borrowings [line items] |  |
Ownership rate | 50.00% |
Other limited recourse debt facilities, 5.08% due 5.08% due September 15, 2036 |  |
Disclosure of detailed information about borrowings [line items] |  |
Number of vessels to be acquired | vessel | 1 |
Long-term debt | $ 12,839,000 | 0
Other limited recourse debt facilities, 5.08% due 5.08% due September 15, 2036 | 50% owned subsidiary |  |
Disclosure of detailed information about borrowings [line items] |  |
Notional amount | $ 13,000,000 |
Other limited recourse debt facilities, 5.08% due 5.08% due September 15, 2036 | Fixed interest rate |  |
Disclosure of detailed information about borrowings [line items] |  |
Borrowings, interest rate | 5.08% |
Unsecured debt due October 15, 2027 |  |
Disclosure of detailed information about borrowings [line items] |  |
Notional amount | $ 700,000,000 |
Borrowings, interest rate | 5.125% |
Debt instruments issued | $ 700,000,000 |
Long-term debt | $ 691,434,000 | 0
Unsecured debt due October 15, 2027 | Fixed interest rate |  |
Disclosure of detailed information about borrowings [line items] |  |
Borrowings, interest rate | 5.125% |
Unsecured debt due March 1, 2022 |  |
Disclosure of detailed information about borrowings [line items] |  |
Repayments of borrowings | $ 250,000,000 |
Construction facilities |  |
Disclosure of detailed information about borrowings [line items] |  |
Long-term debt | 173,000,000 |
Undrawn borrowing facilities | $ 627,000,000 | 800,000,000
Debt covenant, debt to capitalization ratio | 60.00% |
Revolving credit facility |  |
Disclosure of detailed information about borrowings [line items] |  |
Undrawn borrowing facilities | $ 300,000,000 | $ 300,000,000
Debt covenant, EBITDA to interest coverage ratio | 2 |
Debt covenant, debt to capitalization ratio | 57.50% |
Default payment accelerated by a creditor, amount of indebtedness (or more) | $ 50,000,000 |
Default that permits a creditor to demand repayment, amount of indebtedness (or more) | $ 50,000,000 |
Revolving credit facility | Bottom of range |  |
Disclosure of detailed information about borrowings [line items] |  |
Debt covenant, EBITDA to interest coverage ratio | 1.25 |
Amended revolving credit facility |  |
Disclosure of detailed information about borrowings [line items] |  |
Debt covenant, debt to capitalization ratio | 60.00% |

X
- Definition The amount of outstanding funds that the entity is obligated to repay. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_55&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_Borrowings
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The adjustment to the basis (reference rate) used for calculation of the interest rate on borrowings. [Refer: Borrowings] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 7 -IssueDate 2020-01-01 -Paragraph 7 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2020-en-r&anchor=para_7&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_BorrowingsAdjustmentToInterestRateBasis
Namespace Prefix: | ifrs-full_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The interest rate on borrowings. [Refer: Borrowings] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 7 -IssueDate 2020-01-01 -Paragraph 7 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2020-en-r&anchor=para_7&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_BorrowingsInterestRate
Namespace Prefix: | ifrs-full_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The amount of instruments issued by the entity that represent indebtedness. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_55&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_DebtSecurities
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
Name: | ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The nominal or face amount of a financial instrument, used to calculate payments made on that instrument. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_112_c&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_NotionalAmount
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

X
- Definition The proportion of ownership interest in a subsidiary attributable to the entity. [Refer: Subsidiaries [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 27 -IssueDate 2020-01-01 -Paragraph 17 -Subparagraph b -Clause iii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=27&code=ifrs-tx-2020-en-r&anchor=para_17_b_iii&doctype=Standard -URIDate 2020-01-01 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 27 -IssueDate 2020-01-01 -Paragraph 16 -Subparagraph b -Clause iii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=27&code=ifrs-tx-2020-en-r&anchor=para_16_b_iii&doctype=Standard -URIDate 2020-01-01 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2020-01-01 -Paragraph 19B -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2020-en-r&anchor=para_19B_c&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_ProportionOfOwnershipInterestInSubsidiary
Namespace Prefix: | ifrs-full_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The cash outflow to settle borrowings, classified as financing activities. [Refer: Borrowings] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 7 -IssueDate 2020-01-01 -Paragraph 17 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=7&code=ifrs-tx-2020-en-r&anchor=para_17_d&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_RepaymentsOfBorrowingsClassifiedAsFinancingActivities
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The amount of undrawn borrowing facilities that may be available for future operating activities and to settle capital commitments. [Refer: Capital commitments] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 7 -IssueDate 2020-01-01 -Paragraph 50 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=7&code=ifrs-tx-2020-en-r&anchor=para_50_a&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_UndrawnBorrowingFacilities
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amortization Of Debt Issuance Costs + References No definition available. + Details
Name: | mx_AmortizationOfDebtIssuanceCosts
Namespace Prefix: | mx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Borrowings, Covenant, Average Gas Delivery, Percentage Above Gas Requirement + References No definition available. + Details
Name: | mx_BorrowingsCovenantAverageGasDeliveryPercentageAboveGasRequirement
Namespace Prefix: | mx_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Debt Default, Accelerated By Creditor, Long-Term Debt, Amount + References No definition available. + Details
Name: | mx_DebtDefaultAcceleratedByCreditorLongTermDebtAmount
Namespace Prefix: | mx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Debt Default, Creditor Is Permitted To Demand Repayment, Long-Term Debt, Amount + References No definition available. + Details
Name: | mx_DebtDefaultCreditorIsPermittedToDemandRepaymentLongTermDebtAmount
Namespace Prefix: | mx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Debt Instrument, Covenant, Debt To Capitalization Ratio + References No definition available. + Details
Name: | mx_DebtInstrumentCovenantDebtToCapitalizationRatio
Namespace Prefix: | mx_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Debt Instrument, Covenant, EBITDA To Interest Coverage Ratio + References No definition available. + Details
Name: | mx_DebtInstrumentCovenantEBITDAToInterestCoverageRatio
Namespace Prefix: | mx_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number Of Vessels + References No definition available. + Details
Name: | mx_NumberOfVessels
Namespace Prefix: | mx_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of Semi-Annual Principal Payments + References No definition available. + Details
Name: | mx_NumberofSemiAnnualPrincipalPayments
Namespace Prefix: | mx_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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

X
- Details
Name: | dei_LegalEntityAxis=mx_EgyptEntityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_RangeAxis=ifrs-full_BottomOfRangeMember
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_RangeAxis=ifrs-full_TopOfRangeMember
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_SignificantInvestmentsInSubsidiariesAxis=mx_FiftyPercentOwnedSubsidiaryMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=mx_OtherLimitedRecourseDebtFacilities508Member
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_BorrowingsByNameAxis=mx_UnsecuredDebtDueMarchOneTwoThousandTwentyTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=mx_RevolvingCreditFacility1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=mx_AmendedRevolvingCreditFacility1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |