XML 64 R51.htm IDEA: XBRL DOCUMENT v3.21.1

Basis of preparation and presentation of the consolidated financial statements (Narrative) (Details) $ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($) Mg	Dec. 31, 2020 MXN ($) Mg	Dec. 31, 2019 USD ($) Mg	Dec. 31, 2019 MXN ($) Mg
Disclosure of subsidiaries [line items]
Coke inventory | Mg	136,541	136,541	136,541	136,541
Coke inventory, value		$ 953,000		$ 747,000
Bottom of range [Member]
Disclosure of subsidiaries [line items]
Percentage range of changes in fair value or cash flows of hedging instrument	80.00%
Top of range [Member]
Disclosure of subsidiaries [line items]
Percentage range of changes in fair value or cash flows of hedging instrument	125.00%
USD [Member]
Disclosure of subsidiaries [line items]
Average price of coke per metric tons	$ 350		$ 290
ICH (Holding Company) share in SimRep Corporation and Subsidiaries [Member]
Disclosure of subsidiaries [line items]
Percentage of equity owned	0.59%

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

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

Average price of coke per metric tons.

+ References

No definition available.

+ Details

Name:	simecb_AveragePriceOfCokePerMetricTons
Namespace Prefix:	simecb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Coke inventory.

+ References

No definition available.

+ Details

Name:	simecb_CokeInventory
Namespace Prefix:	simecb_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Coke inventory, value.

+ References

No definition available.

+ Details

Name:	simecb_CokeInventoryValue
Namespace Prefix:	simecb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Percentage range of changes in fair value or cash flows of hedging instrument.

+ References

No definition available.

+ Details

Name:	simecb_PercentageRangeOfChangesInFairValueOrCashFlowsOfHedgingInstrument
Namespace Prefix:	simecb_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	ifrs-full_RangeAxis=ifrs-full_BottomOfRangeMember
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:	srt_CurrencyAxis=currency_USD
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=simecb_ICHHoldingCompanyShareInSimRepCorporationAndSubsidiariesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: