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5. FINANCIAL INVESTMENTS (Details) - BRL (R$) R$ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
DisclosureOfFinancialInvestmentsLineItems [Line Items] |  |  |
Current |  | R$ 3,783,362 | R$ 2,633,173
NonCurrent |  | 123,409 | 95,719
Investments [member] |  |  |
DisclosureOfFinancialInvestmentsLineItems [Line Items] |  |  |
Current | [1] | 478,253 | 518,553
Usiminas shares [member] |  |  |
DisclosureOfFinancialInvestmentsLineItems [Line Items] |  |  |
Current | [2] | 3,305,109 | 2,114,620
Bonds [member] |  |  |
DisclosureOfFinancialInvestmentsLineItems [Line Items] |  |  |
Current | [3] |  |
NonCurrent | [3] | R$ 123,409 | R$ 95,719
[1] | These are restricted financial investments and linked to a Bank Deposit Certificate (CDB) to guarantee a letter of guarantee from financial institutions and financial investments in Public Securities (LFT - Letras Financeiras do Tesouro) managed by their exclusive funds.
[2] | Part of the shares guarantees a portion of the Company's debt.
[3] | Bonds with Fibra bank due in February 2028 (see note 22).

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