XML 86 R75.htm IDEA: XBRL DOCUMENT
v3.20.4

Income taxes (Narrative) (Details) R$ in Thousands, $ in Thousands, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 MXN ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2019 MXN ($) | Dec. 31, 2019 BRL (R$) | Dec. 31, 2018 MXN ($) | Dec. 31, 2018 BRL (R$) | Dec. 31, 2017 | Dec. 31, 2016
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |  |  |  |  |  |
Effective tax rate |  | 54.26% | 54.26% | 54.26% | 17.92% | 17.92% | 37.21% |
Amount of tax payments and expenses increase (decrease) |  |  | $ 2,323,700 |  |  |  |  |
GV do Brasil Industria e Comercio of Aco LTDA [Member] |  |  |  |  |  |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |  |  |  |  |  |
Tax losses |  |  | 985,000 |  | $ 1,025,000 |  |  |
Companhia Siderurgica do Espirito Santo S.A. [Member] |  |  |  |  |  |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |  |  |  |  |  |
Tax losses |  |  | 94,000 |  |  |  |  |
USD [Member] |  |  |  |  |  |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |  |  |  |  |  |
Tax losses |  |  | $ 9,268,569 |  |  |  |  |
Brazil, Brazil Real [Member] | GV do Brasil Industria e Comercio of Aco LTDA [Member] |  |  |  |  |  |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |  |  |  |  |  |
Tax losses | R$ |  |  |  | R$ 210,345 |  | R$ 202,008 |  |
Brazil, Brazil Real [Member] | Companhia Siderurgica do Espirito Santo S.A. [Member] |  |  |  |  |  |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |  |  |  |  |  |
Tax losses | R$ |  |  |  | R$ 20,042 |  |  |  |
Mexican companies [Member] |  |  |  |  |  |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |  |  |  |  |  |
Effective tax rate |  | 30.00% | 30.00% | 30.00% | 30.00% | 30.00% |  |
Description of decree issued by finance ministry |  | As of November 18, 2015, the Finance Ministry (SHCP) issued a decree in which a fiscal incentive is given to those who pay income tax (ISR) under terms of the Titles II or IV, Chapter II, Section I of the Law of ISR. Taxpayers who had business income of up to 100 million pesos, | As of November 18, 2015, the Finance Ministry (SHCP) issued a decree in which a fiscal incentive is given to those who pay income tax (ISR) under terms of the Titles II or IV, Chapter II, Section I of the Law of ISR. Taxpayers who had business income of up to 100 million pesos, | As of November 18, 2015, the Finance Ministry (SHCP) issued a decree in which a fiscal incentive is given to those who pay income tax (ISR) under terms of the Titles II or IV, Chapter II, Section I of the Law of ISR. Taxpayers who had business income of up to 100 million pesos, |  |  |  |
Percentage of investment of new fixed assets |  | 69.00% | 69.00% | 69.00% |  |  | 85.00% | 82.00%
Amount of tax payments and expenses increase (decrease) |  |  | $ 2,323,700 |  |  |  |  |
Mexican companies [Member] | Income Tax Estimated Recovery [Member] |  |  |  |  |  |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |  |  |  |  |  |
Amount of tax payments and expenses increase (decrease) | $ 554,400 |  |  |  |  |  |  |
Republic [Member] | USD [Member] |  |  |  |  |  |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |  |  |  |  |  |
Tax losses |  | $ 249,700 |  |  |  |  |  |
Expiration period |  | expire between 2033 and 2038 | expire between 2033 and 2038 | expire between 2033 and 2038 |  |  |  |
State and local [Member] | USD [Member] |  |  |  |  |  |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |  |  |  |  |  |
Tax losses |  | $ 323,600 |  |  |  |  |  |
Expiration period |  | expire between 2020 and 2039 | expire between 2020 and 2039 | expire between 2020 and 2039 |  |  |  |
Canada [Member] | USD [Member] |  |  |  |  |  |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |  |  |  |  |  |
Tax losses |  | $ 5,500 |  |  |  |  |  |
Expiration period |  | expire between 2032 and 2039 | expire between 2032 and 2039 | expire between 2032 and 2039 |  |  |  |

X
- Definition The applicable income tax rate. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2019-01-01 -Paragraph 81 -Subparagraph c -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2019-en-r&anchor=para_81_c_ii&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_ApplicableTaxRate
Namespace Prefix: | ifrs-full_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The description of the expiry date (if any) of deductible temporary differences, unused tax losses and unused tax credits for which no deferred tax asset is recognised in the statement of financial position. [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 2019-01-01 -Paragraph 81 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2019-en-r&anchor=para_81_e&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_DescriptionOfExpiryDateOfTemporaryDifferencesUnusedTaxLossesAndUnusedTaxCredits
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition The amount that represents the difference between the tax expense (income) and the product of the accounting profit multiplied by the applicable tax rate(s) that relates to tax losses. [Refer: Accounting profit] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2019-01-01 -Paragraph 81 -Subparagraph c -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2019-en-r&anchor=para_81_c_i&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_TaxEffectOfTaxLosses
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of tax payments and expenses increase (decrease) during the year. + References No definition available. + Details
Name: | simecb_AmountOfTaxPaymentsAndExpensesIncreaseDecrease
Namespace Prefix: | simecb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Description of decree issued by finance ministry. + References No definition available. + Details
Name: | simecb_DescriptionOfDecreeIssuedByFinanceMinistry
Namespace Prefix: | simecb_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of investment of new fixed assets. + References No definition available. + Details
Name: | simecb_PercentageOfInvestmentOfNewFixedAssets
Namespace Prefix: | simecb_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis=simecb_GVDOBrasilIndustriaComercioOfAcoLTDAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis=simecb_CompanhiaSiderurgicaDoEspiritoSantoSAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

X
- Details
Name: | ifrs-full_GeographicalAreasAxis=ifrs-full_CountryOfDomicileMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_NonadjustingEventsAfterReportingPeriodAxis=simecb_IncomeTaxEstimatedRecoveryMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_GeographicalAreasAxis=simecb_RepublicMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_GeographicalAreasAxis=simecb_StateAndLocalMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_GeographicalAreasAxis=country_CA
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |