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Participative shareholders' debentures (Details 1) - USD ($)
$ in Millions
 6 Months Ended 12 Months Ended
Jun. 30, 2023
Dec. 31, 2022
Jun. 30, 2022
Dec. 31, 2021
Jun. 30, 2021
Dec. 31, 2020
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Participative Shareholders Debentures                  
Remuneration date Oct. 02, 2023 Apr. 03, 2023 Oct. 03, 2022 Apr. 01, 2022 Oct. 01, 2021 Apr. 01, 2021      
Remuneration paid to the participative stockholders debentures $ 106 $ 127 $ 137 $ 234 $ 225 $ 193 $ 233 $ 371 $ 418