XML 322 R114.htm IDEA: XBRL DOCUMENT
v3.22.1

Schedule of other Operating Income and Expenses (Details) R$ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 BRL (R$) Number shares | Dec. 31, 2020 BRL (R$) Number shares | Dec. 31, 2019 BRL (R$)
IfrsStatementLineItems [Line Items] |  |  |
Closing Balance | R$ 2,383,059 | R$ 3,305,109 |
Net cash received | 1,307,347 |  |
Net gain from the transaction | 505,844 |  |
Fair value adjustment recognized in profit or loss | R$ 385,297 | R$ 1,190,489 | R$ (136,004)
Ordinary Shares One [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Quantity (in shares) | shares | 106,620,851 | 107,156,651 |
Equity interest (%) | 15.12% | 15.19% |
Share price | Number | 14.51 | 15.69 |
Closing Balance | R$ 1,547,069 | R$ 1,681,288 |
Quantity (in shares) | shares | (535,800) |  |
Equity interest (%) | 23.57 |  |
Net cash received | R$ 12,627 |  |
Net gain from the transaction | 3,569 |  |
Fair value adjustment recognized in profit or loss | R$ (121,593) | R$ 623,652 | (168,236)
Preference shares [member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Quantity (in shares) | shares | 55,144,456 | 111,144,456 |
Equity interest (%) | 10.07% | 20.29% |
Share price | Number | 15.16 | 14.61 |
Closing Balance | R$ 835,990 | R$ 1,623,821 |
Quantity (in shares) | shares | (56,000,000) |  |
Equity interest (%) | 23.12 |  |
Net cash received | R$ 1,294,720 |  |
Net gain from the transaction | 502,275 |  |
Fair value adjustment recognized in profit or loss | R$ 506,890 | R$ 566,837 | 32,232
Preference Sharesone [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Quantity (in shares) | shares | 2,705,726 | 2,065,529 |
Equity interest (%) | 11.31% | 11.31% |
Share price | Number | 70.34 | 28.99 |
Closing Balance | R$ 190,321 | R$ 59,879 |
Fair value adjustment recognized in profit or loss | 109,254 | 12,579 | 17,224
Total Shares [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Closing Balance | 2,573,380 | 3,364,988 |
Net cash received | 1,307,347 |  |
Net gain from the transaction | 505,844 |  |
Fair value adjustment recognized in profit or loss | R$ 494,551 | R$ 1,203,068 | R$ (118,780)

X
- References No definition available. + Details
Name: | sid_FairValueAdjustmentRecognizedInProfitOrloss
Namespace Prefix: | sid_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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
- References No definition available. + Details
Name: | sid_InvestmentInterestRate1
Namespace Prefix: | sid_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | sid_InvestmentInterestRate3
Namespace Prefix: | sid_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | sid_NetCashReceived
Namespace Prefix: | sid_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | sid_NetGainFromTransaction
Namespace Prefix: | sid_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | sid_NumberOfShares
Namespace Prefix: | sid_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

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

X
- References No definition available. + Details
Name: | sid_SharePrice1
Namespace Prefix: | sid_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

X
- References No definition available. + Details
Name: | sid_StockValue
Namespace Prefix: | sid_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | ifrs-full_ClassesOfShareCapitalAxis=sid_OrdinarySharesOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfShareCapitalAxis=ifrs-full_PreferenceSharesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfShareCapitalAxis=sid_PreferenceSharesoneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfShareCapitalAxis=sid_TotalSharesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |