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v3.23.1

LEASE LIABILITIES (Details Narrative) | 12 Months Ended
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Dec. 31, 2022
Bottom of range [member] | Operational Facilities [Member] |
IfrsStatementLineItems [Line Items] |
Lease agreement remaining term | 1 year
Top of range [member] | Operational Facilities [Member] |
IfrsStatementLineItems [Line Items] |
Lease agreement remaining term | 13 years
Two Year Arrangement [Member] |
IfrsStatementLineItems [Line Items] |
Average increment rate | 14.00%
Five Year Arrangement [Member] |
IfrsStatementLineItems [Line Items] |
Average increment rate | 18.02%

X
- References No definition available. + Details
Name: | sid_AverageIncrementalRate
Namespace Prefix: | sid_
Data Type: | dtr-types:percentItemType
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
- References No definition available. + Details
Name: | sid_LeaseAgreementRemainingTerm
Namespace Prefix: | sid_
Data Type: | xbrli:durationItemType
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_ClassesOfPropertyPlantAndEquipmentAxis=sid_OperationalFacilitiesMember
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: | ifrs-full_RangeAxis=sid_TwoYearArrangementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_RangeAxis=sid_FiveYearArrangementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |