XML 102 R83.htm IDEA: XBRL DOCUMENT
v3.21.1

9. OTHER CURRENT AND NON-CURRENT ASSETS (Details Narrative) R$ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 BRL (R$)
OtherCurrentAndNonCurrentAssetsLineItems [Line Items] |
Receivable for indemnification | R$ 147,612
financial result | 369,571
Eletrobras's compulsory loan [member] |
OtherCurrentAndNonCurrentAssetsLineItems [Line Items] |
Recovery of additional credits | R$ 350,000

X
- Definition The amount of financial result. + References No definition available. + Details
Name: | sid_FinancialResult
Namespace Prefix: | sid_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount of recovery of additional credits. + References No definition available. + Details
Name: | sid_GainOnRecoveryOfCredits
Namespace Prefix: | sid_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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

X
- Definition The amount of receivable for indemnification. + References No definition available. + Details
Name: | sid_ReceivableForIndemnification
Namespace Prefix: | sid_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | ifrs-full_ClassesOfAssetsAxis=sid_MonetaryAdjustmentRelatedToTheEletrobrassCompulsoryLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |