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Significant Events (Details) $ in Millions | Jun. 11, 2021 USD ($)
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Disclosure of non-adjusting events after reporting period [text block] [Abstract] |
Purchase fixed assets | $ 10.0

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- Definition The fair value, at the acquisition date, of equity interests of the acquirer transferred as consideration in a business combination. [Refer: Business combinations [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 3 -IssueDate 2021-01-01 -Paragraph B64 -Subparagraph f -Clause iv -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2021-en-r&anchor=para_B64_f_iv&doctype=Appendix&subtype=B -URIDate 2021-03-24 + Details
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Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- References No definition available. + Details
Name: | simecb_DisclosureOfNonAdjustingEventsAfterReportingPeriodTextBlockAbstract
Namespace Prefix: | simecb_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration