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Short-Term Debt (Details) $ in Thousands, $ in Millions | Dec. 31, 2021 MXN ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 MXN ($) | Dec. 31, 2020 USD ($) | Nov. 15, 2007
--- | --- | --- | --- | --- | ---
Short-Term Debt (Details) [Line Items] |  |  |  |  |
Annual rate | 10.00% | 10.00% |  |  |
Principal amount outstanding | $ 6,196 |  | $ 6,020 |  |
Medium-term notes of Simec [Member] |  |  |  |  |
Short-Term Debt (Details) [Line Items] |  |  |  |  |
Annual rate |  |  |  |  | 10.50%
Medium-term notes of Simec [Member] | USD [Member] |  |  |  |  |
Short-Term Debt (Details) [Line Items] |  |  |  |  |
Principal amount outstanding |  | $ 0.3 |  | $ 0.3 |

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- Definition The interest rate on borrowings. [Refer: Borrowings] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 7 -IssueDate 2021-01-01 -Paragraph 7 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2021-en-r&anchor=para_7&doctype=Standard -URIDate 2021-03-24 + Details
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Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- References No definition available. + Details
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Namespace Prefix: | simecb_
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Balance Type: | credit
Period Type: | instant

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

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_CurrencyAxis=simecb_USDMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |