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5. TRADE RECEIVABLES (Details 1) - BRL (R$) R$ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
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TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade receivable, after allowance for doubtful debts | R$ 1,877,343 | R$ 1,984,865
Third Parties [Member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade receivable, after allowance for doubtful debts | 2,122,537 | 2,222,217
Third Parties [Member] | Current [Member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade receivable, after allowance for doubtful debts | 1,739,746 | 1,514,847
Third Parties [Member] | Past-Due Up To 30 Days [Member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade receivable, after allowance for doubtful debts | 132,845 | 177,287
Third Parties [Member] | Past-Due Up To 180 Days [Member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade receivable, after allowance for doubtful debts | 23,877 | 47,684
Third Parties [Member] | Past-Due Over 180 Days [Member] |  |
TradeAndOtherReceivablesLineItems [Line Items] |  |
Trade receivable, after allowance for doubtful debts | R$ 226,069 | R$ 482,399

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- Definition The amount of gross trade receivable. + References No definition available. + Details
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Namespace Prefix: | sid_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- References No definition available. + Details
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- Details
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- Details
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- Details
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- Details
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- Details
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