XML 105 R72.htm IDEA: XBRL DOCUMENT
v3.24.1.u1

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details Narrative) - R$ / shares | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
United States of America, Dollars |  |
IfrsStatementLineItems [Line Items] |  |
Exchange rates | R$ 1 |
Brazil, Brazil Real |  |
IfrsStatementLineItems [Line Items] |  |
Exchange rates | 4.8413 | R$ 5.2177
Brazil, Brazil Real | Brazilian Central Bank [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Exchange rates | 5.3516 | R$ 5.5694
Euro Member Countries, Euro |  |
IfrsStatementLineItems [Line Items] |  |
Exchange rates | R$ 1 |

X
- References No definition available. + Details
Name: | sid_ExchangeRates
Namespace Prefix: | sid_
Data Type: | dtr-types:perShareItemType
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: | 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_CategoriesOfRelatedPartiesAxis=sid_BrazilianCentralBankMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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