XML 128 R109.htm IDEA: XBRL DOCUMENT
v3.21.1

14. FINANCIAL INSTRUMENTS (Details 1) - BRL (R$) R$ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Disclosure of detailed information about financial instruments [line items] |  |
Current financial assets at fair value through profit or loss | R$ 3,310,174 | R$ 2,120,018
Non-current financial assets at fair value through profit or loss | 59,879 | 51,503
Total Financial assets at fair value through profit or loss | 3,370,053 | 2,171,521
Current financial liabilities at fair value through profit or loss | 8,722 |
Non-current financial liabilities at fair value through profit or loss | 97,535 |
Total financial liabilites at fair value through profit or loss | 106,257 |
Level 1 [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Current financial assets at fair value through profit or loss | 3,370,053 | 2,165,954
Total Financial assets at fair value through profit or loss | 3,370,053 | 2,171,521
Level 2 [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-current financial liabilities at fair value through profit or loss | 106,257 |
Total financial liabilites at fair value through profit or loss | 106,257 |
Financial investments [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Current financial assets at fair value through profit or loss | 3,305,109 | 2,114,620
Financial investments [member] | Level 1 [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Current financial assets at fair value through profit or loss | 3,305,109 | 2,114,620
Derivative financial instruments [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Current financial assets at fair value through profit or loss |  | 1,364
Non-current financial assets at fair value through profit or loss |  | 4,203
Current financial liabilities at fair value through profit or loss | 8,722 |
Non-current financial liabilities at fair value through profit or loss | 97,535 |
Derivative financial instruments [member] | Level 2 [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Current financial assets at fair value through profit or loss |  | 1,364
Non-current financial assets at fair value through profit or loss |  | 4,203
Current financial liabilities at fair value through profit or loss | 8,722 |
Non-current financial liabilities at fair value through profit or loss | 97,535 |
Derivative financial instruments [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Current financial assets at fair value through profit or loss |  | 1,364
Non-current financial assets at fair value through profit or loss |  | 4,203
Current financial liabilities at fair value through profit or loss | 8,722 |
Non-current financial liabilities at fair value through profit or loss | 97,535 |
Trading securities [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Current financial assets at fair value through profit or loss | 5,065 | 4,034
Trading securities [member] | Level 1 [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Current financial assets at fair value through profit or loss | 5,065 | 4,034
Investments [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-current financial assets at fair value through profit or loss |  |
Investments [member] | Level 1 [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-current financial assets at fair value through profit or loss | 59,879 | 47,300
Investments [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-current financial assets at fair value through profit or loss | R$ 59,879 | R$ 47,300

X
- Definition The amount of current financial assets measured at fair value through profit or loss. [Refer: Financial assets at fair value through profit or loss] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2020-01-01 -Paragraph 8 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2020-en-r&anchor=para_8_a&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_CurrentFinancialAssetsAtFairValueThroughProfitOrLoss
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of current financial liabilities measured at fair value through profit or loss. [Refer: Financial liabilities at fair value through profit or loss] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2020-01-01 -Paragraph 8 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2020-en-r&anchor=para_8_e&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_CurrentFinancialLiabilitiesAtFairValueThroughProfitOrLoss
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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 of financial assets that are measured at fair value and for which gains (losses) are recognised in profit or loss. A financial asset shall be measured at fair value through profit or loss unless it is measured at amortised cost or at fair value through other comprehensive income. A gain (loss) on a financial asset measured at fair value shall be recognised in profit or loss unless it is part of a hedging relationship, it is an investment in an equity instrument for which the entity has elected to present gains and losses in other comprehensive income or it is a financial asset measured at fair value through other comprehensive income. [Refer: At fair value [member]; Financial assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2020-01-01 -Paragraph 8 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2020-en-r&anchor=para_8_a&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_FinancialAssetsAtFairValueThroughProfitOrLoss
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of financial liabilities that meet either of the following conditions: (a) they meet the definition of held for trading; or (b) upon initial recognition they are designated by the entity as at fair value through profit or loss. An entity may use this designation only when permitted by paragraph 4.3.5 of IFRS 9 (embedded derivatives) or when doing so results in more relevant information, because either: (a) it eliminates or significantly reduces a measurement or recognition inconsistency (sometimes referred to as ‘an accounting mismatch’) that would otherwise arise from measuring assets or liabilities or recognising the gains and losses on them on different bases; or (b) a group of financial liabilities or financial assets and financial liabilities is managed and its performance is evaluated on a fair value basis, in accordance with a documented risk management or investment strategy, and information about the group is provided internally on that basis to the entity’s key management personnel (as defined in IAS 24). [Refer: At fair value [member]; Key management personnel of entity or parent [member]; Derivatives [member]; Financial assets; Financial liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2020-01-01 -Paragraph 8 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2020-en-r&anchor=para_8_e&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_FinancialLiabilitiesAtFairValueThroughProfitOrLoss
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of non-current financial assets measured at fair value through profit or loss. [Refer: Financial assets at fair value through profit or loss] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2020-01-01 -Paragraph 8 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2020-en-r&anchor=para_8_a&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_NoncurrentFinancialAssetsAtFairValueThroughProfitOrLoss
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of non-current financial liabilities measured at fair value through profit or loss. [Refer: Financial liabilities at fair value through profit or loss] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2020-01-01 -Paragraph 8 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2020-en-r&anchor=para_8_e&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_NoncurrentFinancialLiabilitiesAtFairValueThroughProfitOrLoss
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | ifrs-full_LevelsOfFairValueHierarchyAxis=ifrs-full_Level1OfFairValueHierarchyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_LevelsOfFairValueHierarchyAxis=ifrs-full_Level2OfFairValueHierarchyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialAssetsAxis=sid_FinancialInvestmentes1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialAssetsAxis=ifrs-full_DerivativesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialAssetsAxis=sid_Derivatives1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialAssetsAxis=ifrs-full_TradingEquitySecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialAssetsAxis=ifrs-full_InvestmentPropertyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialAssetsAxis=sid_InvestmentProperty1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |