XML 92 R81.htm IDEA: XBRL DOCUMENT
v3.19.1

6. TRADE RECEIVABLES (Details Narrative) - BRL (R$) R$ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Trade Receivables Details Narrative Abstract |  |
Trade receivables transaction costs | R$ 46,210 | R$ 186,627

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

X
- References No definition available. + Details
Name: | SID_TradeReceivablesTransactionCosts
Namespace Prefix: | SID_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration