XML 313 R105.htm IDEA: XBRL DOCUMENT
v3.22.1

The CGUs with intangible assets in this situation are shown below: (Details) - BRL (R$) R$ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
IfrsStatementLineItems [Line Items] |  |
Cash generating unity | R$ 3,942,845 | R$ 3,821,688
Packaging [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Cash generating unity | 158,748 | 158,748
Long Stel [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Cash generating unity | 449,204 | 451,127
Mining [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Cash generating unity | 3,236,402 | 3,196,588
Other Steel [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Cash generating unity | 15,225 | 15,225
Cement [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Cash generating unity | 83,266 |
Goodwill [member] |  |
IfrsStatementLineItems [Line Items] |  |
Cash generating unity | 3,729,236 | 3,606,156
Goodwill [member] | Packaging [Member] | Steel [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Cash generating unity | 158,748 | 158,748
Goodwill [member] | Long Stel [Member] | Steel [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Cash generating unity | 235,595 | 235,595
Goodwill [member] | Mining [Member] | Minning [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Cash generating unity | 3,236,402 | 3,196,588
Goodwill [member] | Other Steel [Member] | Steel [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Cash generating unity | 15,225 | 15,225
Goodwill [member] | Other Steel [Member] | Cement [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Cash generating unity | 83,266 |
Brand names [member] |  |
IfrsStatementLineItems [Line Items] |  |
Cash generating unity | 213,609 | 215,532
Brand names [member] | Long Stel [Member] | Steel [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Cash generating unity | R$ 213,609 | R$ 215,532

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- Definition The amount by which a cash-generating unit's (group of units') recoverable amount exceeds its carrying amount. [Refer: Carrying amount [member]; Cash-generating units [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2021-01-01 -Paragraph 134 -Subparagraph f -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=36&code=ifrs-tx-2021-en-r&anchor=para_134_f_i&doctype=Standard -URIDate 2021-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2021-01-01 -Paragraph 135 -Subparagraph e -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=36&code=ifrs-tx-2021-en-r&anchor=para_135_e_i&doctype=Standard -URIDate 2021-03-24 + Details
Name: | ifrs-full_AmountByWhichUnitsRecoverableAmountExceedsItsCarryingAmount
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- References No definition available. + Details
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Namespace Prefix: | sid_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | ifrs-full_IndividualAssetsOrCashgeneratingUnitsAxis=sid_PackagingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_IndividualAssetsOrCashgeneratingUnitsAxis=sid_LongStelMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_IndividualAssetsOrCashgeneratingUnitsAxis=sid_MiningMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_IndividualAssetsOrCashgeneratingUnitsAxis=sid_OtherSteelMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_IndividualAssetsOrCashgeneratingUnitsAxis=sid_CementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_SegmentsAxis=sid_SteelMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_SegmentsAxis=sid_MinningMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_SegmentsAxis=sid_CementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis=ifrs-full_BrandNamesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |