v3.26.1
EMPLOYEE BENEFITS (Details 8)
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Plan Covering Thirty Five Percent Of The Average Salary [Member]
IfrsStatementLineItems [Line Items]
Average life expectancy of employees (in years)
18.38
18.38
Average life expectancy in years of employees who are 65 (in years)
18.38
18.38
Average life expectancy of employees (in years)
40.15
40.15
Average life expectancy in years of employees who are 40 (in years)
40.15
40.15
Average Salary Supplementation Plan [Member]
IfrsStatementLineItems [Line Items]
Average life expectancy of employees (in years)
18.75
18.75
Average life expectancy in years of employees who are 65 (in years)
21.41
21.41
Average life expectancy of employees (in years)
40.60
40.60
Average life expectancy in years of employees who are 40 (in years)
44.41
44.41
Mixed Supplementary Benefit Plan [Member]
IfrsStatementLineItems [Line Items]
Average life expectancy of employees (in years)
21.47
21.47
Average life expectancy in years of employees who are 65 (in years)
23.34
23.34
Average life expectancy of employees (in years)
44.07
44.07
Average life expectancy in years of employees who are 40 (in years)
46.68
46.68
Plan A C T Maua Prev [Member]
IfrsStatementLineItems [Line Items]
Average life expectancy of employees (in years)
21.47
21.47
Average life expectancy in years of employees who are 65 (in years)
23.34
23.34
Average life expectancy of employees (in years)
44.07
44.07
Average life expectancy in years of employees who are 40 (in years)
46.68
46.68
Maua Prev [Member]
IfrsStatementLineItems [Line Items]
Average life expectancy of employees (in years)
21.47
21.47
Average life expectancy in years of employees who are 65 (in years)
23.34
23.34
Average life expectancy of employees (in years)
44.07
44.07
Average life expectancy in years of employees who are 40 (in years)
46.68
46.68
X
- References
No definition available.
+ Details
Name:
sid_AverageLifeExpectancyOfEmployeesThatAreFemaleForty
Namespace Prefix:
sid_
Data Type:
xbrli:stringItemType
Balance Type:
na
Period Type:
duration
X
- References
No definition available.
+ Details
Name:
sid_AverageLifeExpectancyOfEmployeesThatAreFemaleSixtyFive
Namespace Prefix:
sid_
Data Type:
xbrli:stringItemType
Balance Type:
na
Period Type:
duration
X
- References
No definition available.
+ Details
Name:
sid_AverageLifeExpectancyOfEmployeesThatAreFourty
Namespace Prefix:
sid_
Data Type:
xbrli:stringItemType
Balance Type:
na
Period Type:
duration
X
- References
No definition available.
+ Details
Name:
sid_AverageLifeExpectancyOfEmployeesThatAreSixtyFive
Namespace Prefix:
sid_
Data Type:
xbrli:stringItemType
Balance Type:
na
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
- Details
Name:
ifrs-full_DefinedBenefitPlansAxis=sid_PlanCoveringThirtyFivePercentOfTheAverageSalaryMember
Namespace Prefix:
Data Type:
na
Balance Type:
Period Type:
X
- Details
Name:
ifrs-full_DefinedBenefitPlansAxis=sid_AverageSalarySupplementationPlanMember
Namespace Prefix:
Data Type:
na
Balance Type:
Period Type:
X
- Details
Name:
ifrs-full_DefinedBenefitPlansAxis=sid_MixedSupplementaryBenefitPlanMember
Namespace Prefix:
Data Type:
na
Balance Type:
Period Type:
X
- Details
Name:
ifrs-full_DefinedBenefitPlansAxis=sid_PlanACTMauaPrevMember
Namespace Prefix:
Data Type:
na
Balance Type:
Period Type:
X
- Details
Name:
ifrs-full_DefinedBenefitPlansAxis=sid_MauaPrevMember
Namespace Prefix:
Data Type:
na
Balance Type:
Period Type: