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SHAREHOLDERS' EQUITY - Treasury shares - Changes (Details) - BRL (R$)
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Quantity      
Balance, beginning of the year 34,765,600,000 51,911,569,000  
Repurchase 51,115,300,000 20,000,000,000  
Stock Repurchase Program, Number of Shares Authorized to be Exercised (1,005,113,000)    
Stock canceled during period, shares (60,000,000,000) (37,145,969,000)  
Balance, end of the year 24,875,787,000 34,765,600,000 51,911,569,000
Average cost per share      
Balance, beginning of the year R$ 42.69 R$ 40.84  
Repurchase 54.91 44.05  
Share Exercised, Price Paid Per Share 47.55    
Weighted Average Price Per Share of Treasury Shares Canceled During the Period 48.40 40.84  
Balance, end of the year R$ 53.84 R$ 42.69 R$ 40.84
Historical value      
Balance, beginning of the year R$ 1,484,014,000 R$ 2,120,324,000  
Shares repurchased 2,806,764,000 880,914,000 R$ (1,904,424,000)
Total amount of exercised shares (47,794,000)    
Stock Canceled During The Period Value (2,903,787,000) (1,517,224,000)  
Balance, end of the year 1,339,197,000 1,484,014,000 2,120,324,000
Market value      
Balance, beginning of the year 1,934,010,000 2,504,214,000  
Repurchase 2,806,764,000 880,914,000  
Stock Exercised During Period, Market Value (54,213,000)    
Stock Canceled During Period, Market Value (3,238,200,000) (1,570,532,000)  
Balance, end of the year R$ 1,536,826,000 R$ 1,934,010,000 R$ 2,504,214,000