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EARNINGS (LOSS) PER SHARE - Diluted earnings (losses) per share (Details) - BRL (R$) R$ / shares in Units, R$ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Diluted earnings per share
Net income for the year attributable to controlling shareholders	R$ 8,626,386	R$ (10,724,828)	R$ (2,817,518)
Weighted average number of shares in the year (except treasury shares) - in thousands	1,349,222	1,349,222	1,349,222
Average number of potential shares (stock options) - in thousands	327
Weighted average number of shares (diluted) - in thousands	1,349,549	1,349,222	1,349,222
Diluted earnings (loss) per common share - R$	R$ 6.39205	R$ (7.94890)	R$ (2.08825)

X

- Definition

The weighted average number of ordinary shares outstanding plus the weighted average number of ordinary shares that would be issued on the conversion of all the dilutive potential ordinary shares into ordinary shares. [Refer: Ordinary shares [member]; Weighted average [member]]

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The amount of profit (loss) attributable to ordinary equity holders of the parent entity (the numerator), divided by the weighted average number of ordinary shares outstanding during the period (the denominator), both adjusted for the effects of all dilutive potential ordinary shares. [Refer: Ordinary shares [member]; Weighted average [member]]

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