XML 346 R138.htm IDEA: XBRL DOCUMENT
v3.22.1

LEASE LIABILITIES (Details Narrative) | 12 Months Ended
--- | ---
Dec. 31, 2021
IfrsStatementLineItems [Line Items] |
Average increment rate | 5.88%
Railway Operation [Member] |
IfrsStatementLineItems [Line Items] |
Lease agreement remaining term | 7 years
Operational Facilities [Member] |
IfrsStatementLineItems [Line Items] |
Lease agreement remaining term | 2 years
Administrative [Member] |
IfrsStatementLineItems [Line Items] |
Lease agreement remaining term | 5 years
Sales Offices [Member] |
IfrsStatementLineItems [Line Items] |
Lease agreement remaining term | 15 years
Bottom of range [member] | Cargo Terminal T E C O N [Member] |
IfrsStatementLineItems [Line Items] |
Lease agreement remaining term | 27 years
Bottom of range [member] | Cargo Terminal T E C A R [Member] |
IfrsStatementLineItems [Line Items] |
Lease agreement remaining term | 31 years
Bottom of range [member] | Operational Facilities [Member] |
IfrsStatementLineItems [Line Items] |
Lease agreement remaining term | 2 years
Top of range [member] | Administrative [Member] |
IfrsStatementLineItems [Line Items] |
Lease agreement remaining term | 5 years
Three Year Arrangement [Member] |
IfrsStatementLineItems [Line Items] |
Average increment rate | 9.10%
Two 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: | num: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_ClassesOfPropertyPlantAndEquipmentAxis=sid_RailwayOperationMember
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_ClassesOfPropertyPlantAndEquipmentAxis=sid_AdministrativeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=sid_SalesOfficesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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_CargoTerminalTECONMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=sid_CargoTerminalTECARMember
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_ThreeYearArrangementMember
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: |