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EMPLOYEE BENEFITS (Details 18) - Post Employment Healthcare Benefits [Member] R$ in Thousands | Dec. 31, 2022 BRL (R$)
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IfrsStatementLineItems [Line Items] |
Year 1 | R$ 67,596
Year 2 | 64,264
Year 3 | 60,913
Year 4 | 57,523
Year 5 | 54,116
Next 5 years | 220,269
Total forecast payments | R$ 524,681

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- References No definition available. + Details
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Namespace Prefix: | sid_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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Namespace Prefix: | sid_
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- References No definition available. + Details
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Namespace Prefix: | sid_
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Balance Type: | credit
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Namespace Prefix: | sid_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- References No definition available. + Details
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Namespace Prefix: | sid_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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Namespace Prefix: | sid_
Data Type: | xbrli:monetaryItemType
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Period Type: | instant

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Namespace Prefix: | sid_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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