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Schedule of share repurchase programs of subsidiary CSN Mineracao (Details) R$ / shares in Units, R$ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 BRL (R$) R$ / shares shares
IfrsStatementLineItems [Line Items] |
Sale of shares | shares | 105,407,300
Treasury balance | R$ | R$ 651,017,574
First Program [Member] |
IfrsStatementLineItems [Line Items] |
Boards authorization | Mar. 24, 2021
Authorized quantity | shares | 58,415,015
Description of program period | rom 3/25/2021 to 9/24/2021
Repurchase average buyback price | R$ 6.1451
Minimum buyback price | 5.5825
Maximum buyback price | R$ 6.7176
Sale of shares | shares | 52,940,500
Treasury balance | R$ | R$ 325,324,667
Second Program [Member] |
IfrsStatementLineItems [Line Items] |
Boards authorization | Nov. 03, 2021
Authorized quantity | shares | 53,000,000
Description of program period | from 11/04/2021 to 9/24/2022
Repurchase average buyback price | R$ 6.2076
Minimum buyback price | 5.0392
Maximum buyback price | R$ 6.1208
Sale of shares | shares | 52,466,800
Treasury balance | R$ | R$ 325,692,908

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