XML 33 R170.htm IDEA: XBRL DOCUMENT v3.20.1

26 EMPLOYEE BENEFITS (Details) - BRL (R$) R$ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
EmployeeBenefitsLineItems [Line Items]
Actuarial assets	R$ (13,714)	R$ (99,894)
Actuarial liabilities	912,184	905,119
Benefits of Pension Plans [Member]
EmployeeBenefitsLineItems [Line Items]
Actuarial assets	13,714	99,894
Actuarial liabilities	19,788	7,982
Post-employment Healthcare Benefits [Member]
EmployeeBenefitsLineItems [Line Items]
Actuarial liabilities	R$ 892,396	R$ 897,137	R$ 866,784

X

- Definition

The amount of assets held by retirement benefit plans. [Refer: Defined benefit plans [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 26
-IssueDate 2019-01-01
-Paragraph 35
-Subparagraph a
-Clause i
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=26&code=ifrs-tx-2019-en-r&anchor=para_35_a_i&doctype=Standard
-URIDate 2019-03-27

+ Details

Name:	ifrs-full_AssetsOfBenefitPlan
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- References

No definition available.

+ Details

Name:	sid_EmployeeBenefitsLineItems
Namespace Prefix:	sid_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The amount of liabilites held by retirement benefit plans.

+ 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: