XML 194 R135.htm IDEA: XBRL DOCUMENT v3.23.1

FINANCIAL INSTRUMENTS (Details 10) - Cash flow hedges [member] - Currency risk [member] R$ in Thousands	12 Months Ended
	Dec. 31, 2022 BRL (R$) Number
IfrsStatementLineItems [Line Items]
Designated amounts	R$ 8,382,746
Amortized part	(3,972,986)
Effect on Result	(1,426,299)	[1]
Impact on Shareholders' equity	R$ 4,434,697
Export prepayments in us$ to third parties [member]
IfrsStatementLineItems [Line Items]
Designation date	07/23/2015
Hedging instrument	Export prepayments in US$ to third parties
Hedged item	Part of the highly probable future monthly iron ore exports
Type of hedged risk	Foreign exchange - R$ vs. US$ spot rate
Hedged period	August 2018 - October 2022
Exchange rate on designation | Number	3.2850
Designated amounts	R$ 30,000
Amortized part	(30,000)
Effect on Result	R$ (11,832)	[1]
ExportPrepaymentsInUsToThirdPartiesOneMember
IfrsStatementLineItems [Line Items]
Designation date	07/24/2015
Hedging instrument	Export prepayments in US$ to third parties
Hedged item	Part of the highly probable future monthly iron ore exports
Type of hedged risk	Foreign exchange - R$ vs. US$ spot rate
Hedged period	August 2018 - October 2022
Exchange rate on designation | Number	3.3254
Designated amounts	R$ 100,000
Amortized part	(100,000)
Effect on Result	(39,382)	[1]
Impact on Shareholders' equity
ExportPrepaymentsInUsToThirdPartiesTwoMember
IfrsStatementLineItems [Line Items]
Designation date	07/27/2015
Hedging instrument	Export prepayments in US$ to third parties
Hedged item	Part of the highly probable future monthly iron ore exports
Type of hedged risk	Foreign exchange - R$ vs. US$ spot rate
Hedged period	August 2018 - October 2022
Exchange rate on designation | Number	3.3557
Designated amounts	R$ 25,000
Amortized part	(25,000)
Effect on Result	(1,583)	[1]
Impact on Shareholders' equity
ExportPrepaymentsInUsToThirdPartiesThreeMember
IfrsStatementLineItems [Line Items]
Designation date	07/27/2015
Hedging instrument	Export prepayments in US$ to third parties
Hedged item	Part of the highly probable future monthly iron ore exports
Type of hedged risk	Foreign exchange - R$ vs. US$ spot rate
Hedged period	August 2018 - October 2022
Exchange rate on designation | Number	3.3557
Designated amounts	R$ 70,000
Amortized part	(70,000)
Effect on Result	(26,068)	[1]
Impact on Shareholders' equity
ExportPrepaymentsInUsToThirdPartiesFourMember
IfrsStatementLineItems [Line Items]
Designation date	07/27/2015
Hedging instrument	Export prepayments in US$ to third parties
Hedged item	Part of the highly probable future monthly iron ore exports
Type of hedged risk	Foreign exchange - R$ vs. US$ spot rate
Hedged period	August 2018 - October 2022
Exchange rate on designation | Number	3.3557
Designated amounts	R$ 30,000
Amortized part	(30,000)
Effect on Result	(20,038)	[1]
Impact on Shareholders' equity
Export Prepayments In Us To Third Parties Five [Member]
IfrsStatementLineItems [Line Items]
Designation date	07/28/2015
Hedging instrument	Export prepayments in US$ to third parties
Hedged item	Part of the highly probable future monthly iron ore exports
Type of hedged risk	Foreign exchange - R$ vs. US$ spot rate
Hedged period	August 2018 - October 2022
Exchange rate on designation | Number	3.3815
Designated amounts	R$ 30,000
Amortized part	(30,000)
Effect on Result	(11,253)	[1]
Impact on Shareholders' equity
Export pepayments in us$ to third parties [member]
IfrsStatementLineItems [Line Items]
Designation date	3/8/2015
Hedging instrument	Export prepayments in US$ to third parties
Hedged item	Part of the highly probable future monthly iron ore exports
Type of hedged risk	Foreign exchange - R$ vs. US$ spot rate
Hedged period	July 2018 - October 2022
Exchange rate on designation | Number	3.3940
Designated amounts	R$ 355,000
Amortized part	(355,000)
Effect on Result	(22,356)	[1]
Impact on Shareholders' equity
Bond [Member]
IfrsStatementLineItems [Line Items]
Designation date	2/4/2018
Hedging instrument	Bonds
Hedged item	Part of the highly probable future monthly iron ore exports
Type of hedged risk	Foreign exchange - R$ vs. US$ spot rate
Hedged period	July 2018 - February 2023
Exchange rate on designation | Number	3.3104
Designated amounts	R$ 1,170,045
Amortized part	(1,093,045)
Effect on Result	(389,596)	[1]
Impact on Shareholders' equity	R$ 290,375
Bonds and export prepayments in us$ [member]
IfrsStatementLineItems [Line Items]
Designation date	07/31/2019
Hedging instrument	Bonds and Export prepayments in US$ to third parties
Hedged item	Part of the highly probable future monthly iron ore exports
Type of hedged risk	Foreign exchange - R$ vs. US$ spot rate
Hedged period	January 2020 - April 2026
Exchange rate on designation | Number	3.7649
Designated amounts	R$ 1,342,761
Amortized part	(829,661)
Effect on Result	(770,870)	[1]
Impact on Shareholders' equity	R$ 745,432
Bond [member]
IfrsStatementLineItems [Line Items]
Designation date	10/1/2020
Hedging instrument	Bonds
Hedged item	Part of the highly probable future monthly iron ore exports
Type of hedged risk	Foreign exchange - R$ vs. US$ spot rate
Hedged period	March 2027 - January 2028
Exchange rate on designation | Number	4.0745
Designated amounts	R$ 1,416,000
Amortized part	(1,287,000)
Effect on Result	(67,766)	[1]
Impact on Shareholders' equity	R$ 1,362,073
Bond Two [Member]
IfrsStatementLineItems [Line Items]
Designation date	01/28/2020
Hedging instrument	Bonds
Hedged item	Part of the highly probable future monthly iron ore exports
Type of hedged risk	Foreign exchange - R$ vs. US$ spot rate
Hedged period	March 2027 - January 2028
Exchange rate on designation | Number	4.2064
Designated amounts	R$ 1,000,000
Amortized part
Effect on Result		[1]
Impact on Shareholders' equity	R$ 1,011,300
Bondsand Exportprepaymentsin U S One [Member]
IfrsStatementLineItems [Line Items]
Designation date	1/6/2022
Hedging instrument	Bonds and Export prepayments in US$ to third parties
Hedged item	Part of the highly probable future monthly iron ore exports
Type of hedged risk	Foreign exchange - R$ vs. US$ spot rate
Hedged period	June 2022 - April 2032
Exchange rate on designation | Number	4.7289
Designated amounts	R$ 1,145,300
Amortized part	(62,200)
Effect on Result	(32,290)	[1]
Impact on Shareholders' equity	R$ 529,419
ExportPrepaymentsInUsToThirdPartiesSevenMember
IfrsStatementLineItems [Line Items]
Designation date	1/6/2022
Hedging instrument	Export prepayments in US$ to third parties
Hedged item	Part of the highly probable future monthly iron ore exports
Type of hedged risk	Foreign exchange - R$ vs. US$ spot rate
Hedged period	June 2022 - May 2033
Exchange rate on designation | Number	4.7289
Designated amounts	R$ 878,640
Amortized part	(61,080)
Effect on Result	(33,265)	[1]
Impact on Shareholders' equity	R$ 399,623
Bond Three [Member]
IfrsStatementLineItems [Line Items]
Designation date	1/12/2022
Hedging instrument	Bonds
Hedged item	Part of the highly probable future monthly iron ore exports
Type of hedged risk	Foreign exchange - R$ vs. US$ spot rate
Hedged period	December 2022 - June 2031
Exchange rate on designation | Number	5.0360
Designated amounts	R$ 490,000
Impact on Shareholders' equity	R$ 89,033
Advance On Foreign Exchange Contract [Member]
IfrsStatementLineItems [Line Items]
Designation date	1/12/2022
Hedging instrument	Advance on foreign exchange contract
Hedged item	Part of the highly probable future monthly iron ore exports
Type of hedged risk	Foreign exchange - R$ vs. US$ spot rate
Hedged period	December 2022 - November 2023
Exchange rate on designation | Number	5.1643
Designated amounts	R$ 60,000
Impact on Shareholders' equity	R$ 3,204
Advance On Foreign Exchange Contract One [Member]
IfrsStatementLineItems [Line Items]
Designation date	1/12/2022
Hedging instrument	Advance on foreign exchange contract
Hedged item	Part of the highly probable future monthly iron ore exports
Type of hedged risk	Foreign exchange - R$ vs. US$ spot rate
Hedged period	December 2022 - December 2025
Exchange rate on designation | Number	5.2565
Designated amounts	R$ 100,000
Impact on Shareholders' equity	R$ (3,880)
Advance On Foreign Exchange Contract Two [Member]
IfrsStatementLineItems [Line Items]
Designation date	1/12/2022
Hedging instrument	Advance on foreign exchange contract
Hedged item	Part of the highly probable future monthly iron ore exports
Type of hedged risk	Foreign exchange - R$ vs. US$ spot rate
Hedged period	December 2022 - January 2024
Exchange rate on designation | Number	5.2660
Designated amounts	R$ 50,000
Impact on Shareholders' equity	R$ (2,415)
Advance On Foreign Exchange Contract Three [Member]
IfrsStatementLineItems [Line Items]
Designation date	1/12/2022
Hedging instrument	Advance on foreign exchange contract
Hedged item	Part of the highly probable future monthly iron ore exports
Type of hedged risk	Foreign exchange - R$ vs. US$ spot rate
Hedged period	December 2022 - November 2023
Exchange rate on designation | Number	5.3270
Designated amounts	R$ 20,000
Impact on Shareholders' equity	R$ (2,186)
Export Prepayments In Us To Third Parties Eight [Member]
IfrsStatementLineItems [Line Items]
Designation date	1/12/2022
Hedging instrument	Export prepayments in US$ to third parties
Hedged item	Part of the highly probable future monthly iron ore exports
Type of hedged risk	Foreign exchange - R$ vs. US$ spot rate
Hedged period	December 2022 - June 2027
Exchange rate on designation | Number	5.0360
Designated amounts	R$ 70,000
Impact on Shareholders' equity	R$ 12,719
[1] The realization of Hedge accounting cash flow is recognized in Other operating income and expenses, note 27.

X

- Definition

The average price of a hedging instrument. [Refer: Hedging instruments [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2022-03-24
-Paragraph 23B
-Subparagraph b
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_23B_b&doctype=Standard
-URIDate 2022-03-24

+ Details

Name:	ifrs-full_AveragePriceOfHedgingInstrument
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The description of financial instruments designated as hedging instruments. Hedging instruments are designated derivatives or (for a hedge of the risk of changes in foreign currency exchange rates only) designated non-derivative financial assets or non-derivative financial liabilities whose fair value or cash flows are expected to offset changes in the fair value or cash flows of a designated hedged item. [Refer: Derivatives [member]; Derivative financial assets; Derivative financial liabilities; Financial instruments, class [member]; Financial assets]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Note Expiry date 2023-01-01
-Name IFRS
-Number 7
-IssueDate 2022-03-24
-Paragraph 22
-Subparagraph b
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2017-en-b&anchor=para_22_b&doctype=Standard&book=b
-URIDate 2022-03-24

+ Details

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

X

- Definition

The description of the nature of risks being hedged.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Note Expiry date 2023-01-01
-Name IFRS
-Number 7
-IssueDate 2022-03-24
-Paragraph 22
-Subparagraph c
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2017-en-b&anchor=para_22_c&doctype=Standard&book=b
-URIDate 2022-03-24

+ Details

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

X

- Definition

The description of periods when cash flows are expected to occur for cash flow hedges. [Refer: Cash flow hedges [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Note Expiry date 2023-01-01
-Name IFRS
-Number 7
-IssueDate 2022-03-24
-Paragraph 23
-Subparagraph a
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2017-en-b&anchor=para_23_a&doctype=Standard&book=b
-URIDate 2022-03-24

+ Details

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

X

- Definition

The description of the type of a hedge used by the entity.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Note Expiry date 2023-01-01
-Name IFRS
-Number 7
-IssueDate 2022-03-24
-Paragraph 22
-Subparagraph a
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2017-en-b&anchor=para_22_a&doctype=Standard&book=b
-URIDate 2022-03-24

+ Details

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

X

- Definition

The amount of a hedged item, recognised as an asset. [Refer: Hedged items [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2022-03-24
-Paragraph 24B
-Subparagraph a
-Clause i
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_24B_a_i&doctype=Standard
-URIDate 2022-03-24

+ Details

Name:	ifrs-full_HedgedItemAssets
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

The amount of other comprehensive income, net of tax, after reclassification adjustments, related to cash flow hedges. [Refer: Cash flow hedges [member]; Other comprehensive income]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2022-03-24
-Paragraph 91
-Subparagraph a
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_91_a&doctype=Standard
-URIDate 2022-03-24

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2022-03-24
-Paragraph 7
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_7&doctype=Standard
-URIDate 2022-03-24

+ Details

Name:	ifrs-full_OtherComprehensiveIncomeNetOfTaxCashFlowHedges
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

The amount refers to effect on financial instruments designated as hedging instruments.

+ References

No definition available.

+ Details

Name:	sid_EffectOnFinancialInstrumentsDesignatedAsHedgingInstruments
Namespace Prefix:	sid_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

The amount refers to financial instruments designated as hedging instruments at fair value amortization.

+ References

No definition available.

+ Details

Name:	sid_FinancialInstrumentsDesignatedAsHedgingInstrumentsAtFairValueAmortization
Namespace Prefix:	sid_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

The amount refers to hedging relationship designation date.

+ References

No definition available.

+ Details

Name:	sid_HedgingRelationshipDesignationDate
Namespace Prefix:	sid_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	sid_IfrsStatementLineItems
Namespace Prefix:	sid_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	ifrs-full_TypesOfHedgesAxis=ifrs-full_CashFlowHedgesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_TypesOfRisksAxis=ifrs-full_CurrencyRiskMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_HedgingInstrumentsAxis=sid_ExportPrepaymentsInUsToThirdPartiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_HedgingInstrumentsAxis=sid_ExportPrepaymentsInUsToThirdPartiesOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_HedgingInstrumentsAxis=sid_ExportPrepaymentsInUsToThirdPartiesTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_HedgingInstrumentsAxis=sid_ExportPrepaymentsInUsToThirdPartiesThreeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_HedgingInstrumentsAxis=sid_ExportPrepaymentsInUsToThirdPartiesFourMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_HedgingInstrumentsAxis=sid_ExportPrepaymentsInUsToThirdPartiesFiveMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_HedgingInstrumentsAxis=sid_ExportPrepaymentsInUsToThirdPartiesSixMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_HedgingInstrumentsAxis=sid_BondMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_HedgingInstrumentsAxis=sid_BondsandExportprepaymentsinUSMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_HedgingInstrumentsAxis=sid_BondOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_HedgingInstrumentsAxis=sid_BondTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_HedgingInstrumentsAxis=sid_BondsandExportprepaymentsinUSOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_HedgingInstrumentsAxis=sid_ExportPrepaymentsInUsToThirdPartiesSevenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_HedgingInstrumentsAxis=sid_BondThreeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_HedgingInstrumentsAxis=sid_AdvanceOnForeignExchangeContractMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_HedgingInstrumentsAxis=sid_AdvanceOnForeignExchangeContractOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_HedgingInstrumentsAxis=sid_AdvanceOnForeignExchangeContractTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_HedgingInstrumentsAxis=sid_AdvanceOnForeignExchangeContractThreeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_HedgingInstrumentsAxis=sid_ExportPrepaymentsInUsToThirdPartiesEightMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: