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MARKETABLE SECURITIES (Details) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Financial Investments
Marketable securities	R$ 6,330,334	R$ 21,098,565
Current	6,150,631	21,098,565
Non Current	179,703
Investment funds
Financial Investments
Marketable securities	R$ 6,683
Percentage of basis used to calculate interest rate	61.51%
Private Funds
Financial Investments
Marketable securities	R$ 1,431,303	14,933,513
Percentage of basis used to calculate interest rate	98.73%
Public Titles Measured At Fair Value Through Profit or Loss
Financial Investments
Marketable securities	R$ 1,631,319	2,049,281
Private Securities (Compromised)
Financial Investments
Marketable securities	R$ 3,081,326	R$ 4,115,771
Percentage of basis used to calculate interest rate	98.73%
Private Securities (Compromised) - Escrow Account
Financial Investments
Marketable securities	R$ 179,703
Percentage of basis used to calculate interest rate	101.02%

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The percentage of the basis (reference rate) used for calculation of the interest rate.

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Total current and non-current debt and equity financial instruments including: (1) securities held-to-maturity, (2) trading securities, and (3) securities available-for-sale.

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Amount of investments in debt and equity securities which have original maturities over to 90 days, including, but not limited to, held-to-maturity, trading and available-for-sale expected to be converted to cash, sold or exchanged within one year or the normal operating cycle, if longer.

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Debt and equity financial instruments including securities held-to-maturity.

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