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On September 30, 2021, the quantity of outstanding of shares was 808,411,566, in the period were delivered of 704,404 shares, in accordance with Restricted Share plan of Company. (Details) - shares
 9 Months Ended 12 Months Ended
Sep. 30, 2021
Dec. 31, 2020
EQUITY    
Shares at the beginning of the period 807,707,162 811,759,800
Purchase of treasury shares (4,836,000)
Delivery of restricted shares 704,404 783,362
Shares at the end of the period 808,411,566 807,707,162