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EQUITY - Common and preferred shares outstanding (Details) - shares
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Common shares      
EQUITY      
Authorized capital 1,500,000,000    
Reconciliations of common and preferred outstanding shares      
Balance at beginning of the year 571,929,945 571,929,945 571,929,945
Share Bonus 28,596,497    
Balance at end of year 600,526,442 571,929,945 571,929,945
Preferred shares      
EQUITY      
Authorized capital 3,000,000,000    
Shares exercise period, excluding public offerings 30 days    
Shares exercise period for public offering 10 days    
Reconciliations of common and preferred outstanding shares      
Balance at beginning of the year 1,091,630,395 1,133,816,901 1,129,231,487
Acquisition of Treasury shares   (44,564,000)  
Share Bonus 54,691,436    
Exercise of long-term incentive plan 2,674,136 2,377,494 4,585,414
Balance at end of year 1,148,995,967 1,091,630,395 1,133,816,901