XML 175 R156.htm IDEA: XBRL DOCUMENT
v3.21.1

22. RELATED-PARTY BALANCES AND TRANSACTIONS (Details 3) - BRL (R$) R$ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019
Disclosure of transactions between related parties [line items] |  |
Borrowings | R$ 23,205,332 | R$ 15,695,779
Tax foreclosure | 35,692 | 41,004
Others | 5,462 | 10,857
Total | 23,246,486 | 15,747,640
Local currency [member] |  |
Disclosure of transactions between related parties [line items] |  |
Borrowings | 19,877,378 | 12,033,973
Tax foreclosure |  |
Others |  |
Total | 19,877,378 | 12,033,973
Guarantees [member] | Foreign currency [member] | Euro [member] |  |
Disclosure of transactions between related parties [line items] |  |
Borrowings |  | 24,000
Total |  | 24,000
Guarantees [member] | Foreign currency [member] | Euro [member] | CSN steel s.l. [member] |  |
Disclosure of transactions between related parties [line items] |  |
Borrowings |  | 24,000
Total |  | 24,000
Guarantees [member] | Foreign currency [member] | USD |  |
Disclosure of transactions between related parties [line items] |  |
Borrowings | 3,825,000 | 2,958,603
Tax foreclosure |  |
Others |  |
Total | R$ 3,825,000 | 2,958,603
Guarantees [member] | Foreign currency [member] | USD | CSN islands XII [member] |  |
Disclosure of transactions between related parties [line items] |  |
Maturities | Perpetual |
Borrowings | R$ 1,000,000 | 1,000,000
Tax foreclosure |  |
Others |  |
Total | R$ 1,000,000 | 1,000,000
Guarantees [member] | Foreign currency [member] | USD | CSN resources [member] |  |
Disclosure of transactions between related parties [line items] |  |
Maturities | Up to 04/17/2026 |
Borrowings | R$ 1,525,000 | 1,958,603
Tax foreclosure |  |
Others |  |
Total | R$ 1,525,000 | 1,958,603
Guarantees [member] | Foreign currency [member] | USD | CSN inova ventures [member] |  |
Disclosure of transactions between related parties [line items] |  |
Maturities | 1/28/2028 |
Borrowings | R$ 1,300,000 |
Total | 1,300,000 |
Guarantees [member] | Local currency [member] |  |
Disclosure of transactions between related parties [line items] |  |
Borrowings | 3,327,954 | 3,661,806
Tax foreclosure | 35,692 | 41,004
Others | 5,462 | 10,857
Total | R$ 3,369,108 | 3,713,667
Guarantees [member] | Local currency [member] | Transnordestina logistica s.a [member] |  |
Disclosure of transactions between related parties [line items] |  |
Maturities | Up to 09/19/2056 and Indefinite |
Borrowings | R$ 2,478,105 | 2,428,194
Tax foreclosure | 35,496 | 37,406
Others | 3,298 | 8,702
Total | R$ 2,516,899 | 2,474,302
Guarantees [member] | Local currency [member] | FTL - ferrovia transnordestina [member] |  |
Disclosure of transactions between related parties [line items] |  |
Maturities | Up to 04/01/2021 |
Borrowings |  | 43,118
Tax foreclosure |  |
Others |  |
Total |  | 43,118
Guarantees [member] | Local currency [member] | Cia metalurgica prada [member] |  |
Disclosure of transactions between related parties [line items] |  |
Maturities | Indefinite |
Tax foreclosure | R$ 196 | 457
Others | 244 | 235
Total | R$ 440 | 692
Guarantees [member] | Local currency [member] | CSN energia [member] |  |
Disclosure of transactions between related parties [line items] |  |
Maturities | Up to 11/26/2023 and indefinite |
Tax foreclosure |  | 3,141
Others | 1,920 | 1,920
Total | R$ 1,920 | 5,061
Guarantees [member] | Local currency [member] | CSN mineracao [member] |  |
Disclosure of transactions between related parties [line items] |  |
Maturities | Up to 12/21/2024 |
Borrowings | R$ 846,749 | 1,184,048
Tax foreclosure |  |
Others |  |
Total | R$ 846,749 | 1,184,048
Guarantees [member] | Local currency [member] | Estanho de rondonia [member] |  |
Disclosure of transactions between related parties [line items] |  |
Maturities | 7/15/2022 |
Borrowings | R$ 1,154 | 1,902
Total | R$ 1,154 | 1,902
Guarantees [member] | Local currency [member] | Minerios nacional s.a. [member] |  |
Disclosure of transactions between related parties [line items] |  |
Maturities | Up to 09/10/2021 |
Borrowings | R$ 1,946 | 4,544
Tax foreclosure |  |
Others |  |
Total | R$ 1,946 | R$ 4,544

X
- Definition The maturity of borrowings. [Refer: Borrowings] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 7 -IssueDate 2020-01-01 -Paragraph 7 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2020-en-r&anchor=para_7&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_BorrowingsMaturity
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
Name: | ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount refers to borrowings relaetd party. + References No definition available. + Details
Name: | sid_BorrowingsRelaetdParty
Namespace Prefix: | sid_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount refers to others guarantees. + References No definition available. + Details
Name: | sid_OthersGuarantees
Namespace Prefix: | sid_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount refers to tax foreclosure. + References No definition available. + Details
Name: | sid_TaxForeclosure
Namespace Prefix: | sid_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount refers to total guarantees. + References No definition available. + Details
Name: | sid_TotalGuarantees
Namespace Prefix: | sid_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | sid_TypeOfFunctionalCurrencyAxis=sid_LocalCurrencyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ContinuingInvolvementInDerecognisedFinancialAssetsByTypeOfInstrumentAxis=ifrs-full_GuaranteesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | sid_TypeOfFunctionalCurrencyAxis=sid_ForeignCurrencyMember
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: |

X
- Details
Name: | ifrs-full_JointOperationsAxis=sid_CSNSteelSLMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | ifrs-full_JointOperationsAxis=sid_CSNIslandsXIIMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_JointOperationsAxis=sid_CSNResourcesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_JointOperationsAxis=sid_CSNInovaVenturesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_JointOperationsAxis=sid_TransnordestinaLogisticaSAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_JointOperationsAxis=sid_FTLFerroviaTransnordestinaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_JointOperationsAxis=sid_CiaMetalurgicaPradaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_JointOperationsAxis=sid_CSNEnergiaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_JointOperationsAxis=sid_CSNMineracaoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_JointOperationsAxis=sid_EstanhoDeRondoniaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_JointOperationsAxis=sid_MineriosNacionalSAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |