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SHAREHOLDERS' EQUITY - Treasury Shares - Changes (Details) - BRL (R$)
R$ / shares in Units, R$ in Thousands
 6 Months Ended 12 Months Ended
Feb. 28, 2023
Jun. 30, 2023
Jun. 30, 2022
Dec. 31, 2022
Quantity        
Beginning balance   51,911,569 12,042,004 12,042,004
Realization in the restricted shares plan       130,435
Repurchase   17,701,300   40,000,000
Canceled 37,145,969 37,145,969    
Ending balance   32,466,900   51,911,569
Average cost per share        
Beginning balance   R$ 40.84 R$ 18.13 R$ 18.13
Realization in the restricted shares plan       18.13
Repurchase   43.98   47.61
Canceled R$ 40.84 40.84    
Ending balance   R$ 42.55   R$ 40.84
Historical value        
Beginning balance   R$ 2,120,324 R$ 218,265 R$ 218,265
Realization in the restricted shares plan       2,365
Repurchase   778,500 601,551 1,904,424
Canceled R$ 1,517,224 1,517,224    
Ending balance   1,381,600   2,120,324
Market value        
Beginning balance   2,504,214 R$ 656,530 656,530
Realization in the restricted shares plan       8,156
Repurchase   778,500   1,904,424
Canceled   1,570,532    
Beginning balance   R$ 1,435,686   R$ 2,504,214