XML 244 R185.htm IDEA: XBRL DOCUMENT
v3.23.1

EMPLOYEE BENEFITS (Details) - BRL (R$) R$ in Thousands | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | --- | --- | ---
IfrsStatementLineItems [Line Items] |  |  |  |
Actuarial assets | R$ (35,477) | R$ (59,111) |  |
Actuarial liabilities | 537,290 | 584,288 | R$ 678,880 |
Defined benefit plans other than multi-employer plans, state plans and plans that share risks between entities under common control [member] |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |
Actuarial assets | (35,477) | (59,111) | 65,727 |
Post Employment Healthcare Benefits [Member] |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |
Actuarial liabilities | R$ 537,290 | R$ 584,288 | R$ 678,880 | R$ 892,396

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

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

X
- Details
Name: | ifrs-full_DefinedBenefitPlansAxis=ifrs-full_DefinedBenefitPlansOtherThanMultiemployerPlansStatePlansAndPlansThatShareRisksBetweenEntitiesUnderCommonControlMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_DefinedBenefitPlansAxis=sid_PostEmploymentHealthcareBenefitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |