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Schedule of earnings per share - basic and diluted (Details) - BRL (R$)
R$ / shares in Units, R$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
IfrsStatementLineItems [Line Items]      
Basic and diluted earnings R$ 4,952,573 R$ 3,904,202 R$ 1,989,946
Ordinary shares [member]      
IfrsStatementLineItems [Line Items]      
Basic and diluted earnings R$ 1,899,620 R$ 1,975,751 R$ 1,007,102
Weighted average of shares 1,176,755,935 1,450,310,800 1,450,310,800
Basic and diluted earnings per share attributable to shareholders of parent company R$ 1.61429 R$ 1.36229 R$ 0.69440
Class A Preferred Shares [Member]      
IfrsStatementLineItems [Line Items]      
Basic and diluted earnings R$ 5,908 R$ 5,883 R$ 2,809
Weighted average of shares 3,171,194 3,268,067 3,273,682
Basic and diluted earnings per share attributable to shareholders of parent company R$ 1.86252 R$ 1.80062 R$ 0.85790
Class B Preferred Shares [Member]      
IfrsStatementLineItems [Line Items]      
Basic and diluted earnings R$ 3,047,045 R$ 1,922,568 R$ 980,035
Weighted average of shares 1,556,626,621 1,282,974,883 1,282,969,268
Basic and diluted earnings per share attributable to shareholders of parent company R$ 1.95747 R$ 1.49852 R$ 0.76388
Continuing Operations 1 [Member]      
IfrsStatementLineItems [Line Items]      
Basic and diluted earnings R$ 3,767,197 R$ 3,823,981 R$ 2,078,267
Weighted average of shares 2,736,553,750 2,736,553,750 2,736,553,750
Continuing Operations 1 [Member] | Ordinary shares [member]      
IfrsStatementLineItems [Line Items]      
Basic and diluted earnings R$ 1,417,379 R$ 1,935,144 R$ 1,051,809
Weighted average of shares 1,176,755,935 1,450,310,800 1,450,310,800
Basic and diluted earnings per share attributable to shareholders of parent company R$ 1.20448 R$ 1.33430 R$ 0.72523
Continuing Operations 1 [Member] | Class A Preferred Shares [Member]      
IfrsStatementLineItems [Line Items]      
Basic and diluted earnings R$ 4,478 R$ 5,783 R$ 2,920
Weighted average of shares 3,171,194 3,268,067 3,273,682
Basic and diluted earnings per share attributable to shareholders of parent company R$ 1.41173 R$ 1.76982 R$ 0.89086
Continuing Operations 1 [Member] | Class B Preferred Shares [Member]      
IfrsStatementLineItems [Line Items]      
Basic and diluted earnings R$ 2,345,340 R$ 1,883,054 R$ 1,023,538
Weighted average of shares 1,556,626,621 1,282,974,883 1,282,969,268
Basic and diluted earnings per share attributable to shareholders of parent company R$ 1.50668 R$ 1.46773 R$ 0.79778
Discontinued operations [member]      
IfrsStatementLineItems [Line Items]      
Basic and diluted earnings R$ 1,185,376 R$ 80,221 R$ (88,321)
Weighted average of shares 2,736,553,750 2,736,553,750 2,736,553,750
Discontinued operations [member] | Ordinary shares [member]      
IfrsStatementLineItems [Line Items]      
Basic and diluted earnings R$ 482,241 R$ 40,607 R$ (44,707)
Weighted average of shares 1,176,755,935 1,450,310,800 1,450,310,800
Basic and diluted earnings per share attributable to shareholders of parent company R$ 0.40981 R$ 0.02800 R$ (0.03083)
Discontinued operations [member] | Class A Preferred Shares [Member]      
IfrsStatementLineItems [Line Items]      
Basic and diluted earnings R$ 1,430 R$ 100 R$ (111)
Weighted average of shares 3,171,194 3,268,067 3,273,682
Basic and diluted earnings per share attributable to shareholders of parent company R$ 0.45079 R$ 0.03080 R$ (0.03391)
Discontinued operations [member] | Class B Preferred Shares [Member]      
IfrsStatementLineItems [Line Items]      
Basic and diluted earnings R$ 701,705 R$ 39,514 R$ (43,503)
Weighted average of shares 1,556,626,621 1,282,974,883 1,282,969,268
Basic and diluted earnings per share attributable to shareholders of parent company R$ 0.45079 R$ 0.03080 R$ (0.03391)