XML 129 R120.htm IDEA: XBRL DOCUMENT v3.20.1

12. FINANCIAL INSTRUMENTS (Details 14) R$ in Thousands	Dec. 31, 2019 BRL (R$)
Borrowings And Financing [Member]
Disclosure of detailed information about financial instruments [line items]
Contractual maturities	R$ 28,090,703
Borrowings And Financing [Member] | 2020 [member]
Disclosure of detailed information about financial instruments [line items]
Contractual maturities	5,152,234
Borrowings And Financing [Member] | 2021 [member]
Disclosure of detailed information about financial instruments [line items]
Contractual maturities	6,888,149
Borrowings And Financing [Member] | Later than two years and not later than five years [member]
Disclosure of detailed information about financial instruments [line items]
Contractual maturities	9,087,030
Borrowings And Financing [Member] | Later than five years [member]
Disclosure of detailed information about financial instruments [line items]
Contractual maturities	6,963,290
Leases [Member]
Disclosure of detailed information about financial instruments [line items]
Contractual maturities	474,390
Leases [Member] | 2020 [member]
Disclosure of detailed information about financial instruments [line items]
Contractual maturities	35,040
Leases [Member] | 2021 [member]
Disclosure of detailed information about financial instruments [line items]
Contractual maturities	44,873
Leases [Member] | Later than two years and not later than five years [member]
Disclosure of detailed information about financial instruments [line items]
Contractual maturities	44,872
Leases [Member] | Later than five years [member]
Disclosure of detailed information about financial instruments [line items]
Contractual maturities	349,605
Trade Payables [Member]
Disclosure of detailed information about financial instruments [line items]
Contractual maturities	3,012,654
Trade Payables [Member] | 2020 [member]
Disclosure of detailed information about financial instruments [line items]
Contractual maturities	3,012,654
Trade Payables - Drawee Risk [Member]
Disclosure of detailed information about financial instruments [line items]
Contractual maturities	1,121,312
Trade Payables - Drawee Risk [Member] | 2020 [member]
Disclosure of detailed information about financial instruments [line items]
Contractual maturities	1,121,312
Dividends And Interest On Equity [Member]
Disclosure of detailed information about financial instruments [line items]
Contractual maturities	13,252
Dividends And Interest On Equity [Member] | 2020 [member]
Disclosure of detailed information about financial instruments [line items]
Contractual maturities	R$ 13,252

X

- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

+ References

No definition available.

+ Details

Name:	ifrs-full_DisclosureOfFinancialInstrumentsLineItems
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The amount refers to contractual maturities.

+ References

No definition available.

+ Details

Name:	sid_ContractualMaturities
Namespace Prefix:	sid_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Details

Name:	ifrs-full_ClassesOfFinancialLiabilitiesAxis=sid_BorrowingsAndFinancingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_MaturityAxis=ifrs-full_NotLaterThanOneYearMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_MaturityAxis=ifrs-full_LaterThanOneYearAndNotLaterThanTwoYearsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_MaturityAxis=ifrs-full_LaterThanTwoYearsAndNotLaterThanFiveYearsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_MaturityAxis=ifrs-full_LaterThanFiveYearsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ClassesOfFinancialLiabilitiesAxis=sid_LeasesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ClassesOfFinancialLiabilitiesAxis=sid_TradePayablesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ClassesOfFinancialLiabilitiesAxis=sid_TradePayablesDraweeRiskMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ClassesOfFinancialLiabilitiesAxis=sid_DividendsAndInterestOnEquityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: