XML 192 R133.htm IDEA: XBRL DOCUMENT
v3.23.1

FINANCIAL INSTRUMENTS (Details 8) R$ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 BRL (R$)
IfrsStatementLineItems [Line Items] |
Cash flow hedge accounting - Platts | R$ 341,269
Income tax and social contribution on cash flow hedge accounting | (116,031)
Fair Value of cash flow accounting - Platts, net | 225,238
Movement [Member] |
IfrsStatementLineItems [Line Items] |
Cash flow hedge accounting - Platts | 393,559
Income tax and social contribution on cash flow hedge accounting | (133,810)
Fair Value of cash flow accounting - Platts, net | 259,749
Realization [Member] |
IfrsStatementLineItems [Line Items] |
Cash flow hedge accounting - Platts | (52,290)
Income tax and social contribution on cash flow hedge accounting | 17,779
Fair Value of cash flow accounting - Platts, net | R$ (34,511)

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

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

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

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

X
- Details
Name: | ifrs-full_TypesOfHedgesAxis=sid_MovementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TypesOfHedgesAxis=sid_RealizationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |