XML 142 R110.htm IDEA: XBRL DOCUMENT v3.25.1

FINANCIAL INSTRUMENTS (Details 3) - Currency risk [member]	Dec. 31, 2024
United States of America, Dollars
IfrsStatementLineItems [Line Items]
Exchange rate	6.1923
United States of America, Dollars | Probable Scenario [Member]
IfrsStatementLineItems [Line Items]
Exchange rate	5.7779
United States of America, Dollars | Scenario I [Member]
IfrsStatementLineItems [Line Items]
Exchange rate	6.2560
United States of America, Dollars | Scenario I I [Member]
IfrsStatementLineItems [Line Items]
Exchange rate	5.0799
Euro Member Countries, Euro
IfrsStatementLineItems [Line Items]
Exchange rate	6.4363
Euro Member Countries, Euro | Probable Scenario [Member]
IfrsStatementLineItems [Line Items]
Exchange rate	6.0656
Euro Member Countries, Euro | Scenario I [Member]
IfrsStatementLineItems [Line Items]
Exchange rate	6.4654
Euro Member Countries, Euro | Scenario I I [Member]
IfrsStatementLineItems [Line Items]
Exchange rate	5.3780
USD x EUR [Member]
IfrsStatementLineItems [Line Items]
Exchange rate	1.0394
USD x EUR [Member] | Probable Scenario [Member]
IfrsStatementLineItems [Line Items]
Exchange rate	1.0498
USD x EUR [Member] | Scenario I [Member]
IfrsStatementLineItems [Line Items]
Exchange rate	1.0471
USD x EUR [Member] | Scenario I I [Member]
IfrsStatementLineItems [Line Items]
Exchange rate	0.8606

X

- Definition

The spot exchange rate at the end of the reporting period. Exchange rate is the ratio of exchange for two currencies. Spot exchange rate is the exchange rate for immediate delivery.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2024-01-01
-Paragraph 112
-Subparagraph c
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_112_c&doctype=Standard
-URIDate 2024-03-27

+ Details

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

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_CurrencyInWhichInformationIsDisplayedAxis=sid_CurrencyOfUSDMember
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_ProbabilityOfDefaultAxis=sid_ProbableScenarioMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ProbabilityOfDefaultAxis=sid_ScenarioIMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ProbabilityOfDefaultAxis=sid_ScenarioIIMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_CurrencyInWhichInformationIsDisplayedAxis=sid_CurrencyOfEURMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_CurrencyInWhichInformationIsDisplayedAxis=sid_USDXEURMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: