XML 149 R130.htm IDEA: XBRL DOCUMENT
v3.21.1

15. OTHER PAYABLES (Details Narrative) - CSN mineracao [member] R$ in Thousands, $ in Thousands |  |  | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Aug. 28, 2020 USD ($) | Jul. 31, 2020 T | Dec. 31, 2020 | Dec. 31, 2019 T | Aug. 28, 2020 BRL (R$) | Aug. 05, 2019 USD ($) | Aug. 05, 2019 BRL (R$) | Mar. 29, 2019 USD ($) | Mar. 29, 2019 BRL (R$)
OtherPayablesLineItems [Line Items] |  |  |  |  |  |  |  |  |
Supply of iron ore |  |  |  | 22,000,000 |  |  |  |  |
Additional supply of iron ore |  | 4,000,000 |  | 11,000,000 |  |  |  |  |
Advances from customer | R$ |  |  |  |  | R$ 629,000 |  | R$ 956,440 |  | R$ 1,951,303
Contractual term | 3 years |  | 5 years |  |  |  |  |  |
USD |  |  |  |  |  |  |  |  |
OtherPayablesLineItems [Line Items] |  |  |  |  |  |  |  |  |
Advances from customer | $ | $ 115,000 |  |  |  |  | $ 250,000 |  | $ 496,000 |

X
- Definition The amount of loans and advances the entity has made to customers. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_55&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_LoansAndAdvancesToCustomers
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Represent information about the supply of iron ore. + References No definition available. + Details
Name: | sid_AdditionalSupplyOfIronOre
Namespace Prefix: | sid_
Data Type: | num:massItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount refers to contractual term. + References No definition available. + Details
Name: | sid_ContractualTerm
Namespace Prefix: | sid_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition The amount of numbers of share issued value. + References No definition available. + Details
Name: | sid_SupplyOfIronOre
Namespace Prefix: | sid_
Data Type: | num:massItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | sid_CurrencyAxisSignificantInvestmentsInSubsidiariesAxis=sid_CSNMineracaoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_CurrencyAxis=currency_USD
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |