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16. INVESTMENTS (Details 7) - Centroeste [member] R$ in Millions	Dec. 31, 2020 BRL (R$)
Disclosure of detailed information about business combination [line items]
Fair value on the acquisition date	R$ 120
Equity interest held by the Company before the acquisition of control	51.00%
Previously held interest, valued at fair value on the date control was obtained	R$ 61
Carrying value of the investment	(24)
Remeasurement of previously held equity interest in subsidiaries acquired	R$ 37

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The acquisition-date fair value of equity interest in the acquiree held by the acquirer immediately before the acquisition date in a business combination achieved in stages. [Refer: Business combinations [member]]

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The fair value, at acquisition date, of the consideration transferred in a business combination. [Refer: Business combinations [member]]

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