XML 113 R90.htm IDEA: XBRL DOCUMENT
v3.24.0.1

Share-based compensation - Changes in SARs and TSARs (Details) | 12 Months Ended
--- | ---
Dec. 31, 2023 shares $ / shares | Dec. 31, 2022 shares $ / shares
SARs |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Number of outstanding units, beginning of period (in units) | shares | 407,687 | 666,256
Number of outstanding units granted (in units) | shares | 51,160 | 32,730
Number of outstanding units exercised (in units) | shares | (50,715) | (129,162)
Number of outstanding units cancelled (in units) | shares | (5,600) | (12,900)
Number of outstanding units expired (in units) | shares |  | (149,237)
Number of outstanding units, end of period (in units) | shares | 402,532 | 407,687
Exercise price of outstanding units, beginning of period (in usd per unit) | $ / shares | $ 44.67 | $ 45.7
Exercise price of outstanding units granted (in usd per unit) | $ / shares | 50.49 | 48.49
Exercise price of outstanding units exercised (in usd per unit) | $ / shares | 33.85 | 37.17
Exercise price of outstanding units cancelled (in usd per unit) | $ / shares | 53.69 | 55.70
Exercise price of outstanding units expired (in usd per unit) | $ / shares |  | 55.66
Exercise price of outstanding units, end of period (in usd per unit) | $ / shares | $ 46.65 | $ 44.67
TSARs |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Number of outstanding units, beginning of period (in units) | shares | 2,188,359 | 2,380,237
Number of outstanding units granted (in units) | shares | 169,190 | 266,090
Number of outstanding units exercised (in units) | shares | (336,535) | (290,577)
Number of outstanding units cancelled (in units) | shares | (13,544) | (21,922)
Number of outstanding units expired (in units) | shares |  | (145,469)
Number of outstanding units, end of period (in units) | shares | 2,007,470 | 2,188,359
Exercise price of outstanding units, beginning of period (in usd per unit) | $ / shares | $ 42.68 | $ 42.05
Exercise price of outstanding units granted (in usd per unit) | $ / shares | 50.49 | 48.49
Exercise price of outstanding units exercised (in usd per unit) | $ / shares | 31.88 | 35.94
Exercise price of outstanding units cancelled (in usd per unit) | $ / shares | 51.36 | 46.45
Exercise price of outstanding units expired (in usd per unit) | $ / shares |  | 55.82
Exercise price of outstanding units, end of period (in usd per unit) | $ / shares | $ 45.10 | $ 42.68

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_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of other equity instruments (ie other than share options) granted in a share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 2 -IssueDate 2023-01-01 -Paragraph 45 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2023-en-r&anchor=para_45&doctype=Standard -URIDate 2023-03-23 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2023-01-01 -Paragraph 47 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2023-en-r&anchor=para_47_b&doctype=Standard -URIDate 2023-03-23 + Details
Name: | ifrs-full_NumberOfInstrumentsOtherEquityInstrumentsGranted
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of other equity instruments (ie other than share options) exercised or vested in a share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 2 -IssueDate 2023-01-01 -Paragraph 45 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2023-en-r&anchor=para_45&doctype=Standard -URIDate 2023-03-23 + Details
Name: | ifrs-full_NumberOfOtherEquityInstrumentsExercisedOrVestedInSharebasedPaymentArrangement
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of other equity instruments (ie other than share options) expired in a share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 2 -IssueDate 2023-01-01 -Paragraph 45 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2023-en-r&anchor=para_45&doctype=Standard -URIDate 2023-03-23 + Details
Name: | ifrs-full_NumberOfOtherEquityInstrumentsExpiredInSharebasedPaymentArrangement
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of other equity instruments (ie other than share options) forfeited in a share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 2 -IssueDate 2023-01-01 -Paragraph 45 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2023-en-r&anchor=para_45&doctype=Standard -URIDate 2023-03-23 + Details
Name: | ifrs-full_NumberOfOtherEquityInstrumentsForfeitedInSharebasedPaymentArrangement
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of other equity instruments (ie other than share options) outstanding in a share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 2 -IssueDate 2023-01-01 -Paragraph 45 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2023-en-r&anchor=para_45&doctype=Standard -URIDate 2023-03-23 + Details
Name: | ifrs-full_NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

X
- Definition The weighted average exercise price of other equity instruments (ie other than share options) exercised or vested in a share-based payment arrangement. [Refer: Weighted average [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 2 -IssueDate 2023-01-01 -Paragraph 45 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2023-en-r&anchor=para_45&doctype=Standard -URIDate 2023-03-23 + Details
Name: | ifrs-full_WeightedAverageExercisePriceOfOtherEquityInstrumentsExercisedOrVestedInSharebasedPaymentArrangement2019
Namespace Prefix: | ifrs-full_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition The weighted average exercise price of other equity instruments (ie other than share options) expired in a share-based payment arrangement. [Refer: Weighted average [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 2 -IssueDate 2023-01-01 -Paragraph 45 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2023-en-r&anchor=para_45&doctype=Standard -URIDate 2023-03-23 + Details
Name: | ifrs-full_WeightedAverageExercisePriceOfOtherEquityInstrumentsExpiredInSharebasedPaymentArrangement2019
Namespace Prefix: | ifrs-full_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition The weighted average exercise price of other equity instruments (ie other than share options) forfeited in a share-based payment arrangement. [Refer: Weighted average [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 2 -IssueDate 2023-01-01 -Paragraph 45 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2023-en-r&anchor=para_45&doctype=Standard -URIDate 2023-03-23 + Details
Name: | ifrs-full_WeightedAverageExercisePriceOfOtherEquityInstrumentsForfeitedInSharebasedPaymentArrangement2019
Namespace Prefix: | ifrs-full_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition The weighted average exercise price of other equity instruments (ie other than share options) granted in a share-based payment arrangement. [Refer: Weighted average [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 2 -IssueDate 2023-01-01 -Paragraph 45 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2023-en-r&anchor=para_45&doctype=Standard -URIDate 2023-03-23 + Details
Name: | ifrs-full_WeightedAverageExercisePriceOfOtherEquityInstrumentsGrantedInSharebasedPaymentArrangement2019
Namespace Prefix: | ifrs-full_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition The weighted average exercise price of other equity instruments (ie other than share options) outstanding in a share-based payment arrangement. [Refer: Weighted average [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 2 -IssueDate 2023-01-01 -Paragraph 45 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2023-en-r&anchor=para_45&doctype=Standard -URIDate 2023-03-23 + Details
Name: | ifrs-full_WeightedAverageExercisePriceOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement2019
Namespace Prefix: | ifrs-full_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=mx_ShareAppreciationRightsSARMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=mx_TandemShareAppreciationRightsTSARMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |