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Participative shareholders? debentures (Details 1) - USD ($)
$ in Millions
 6 Months Ended 12 Months Ended
Jun. 30, 2022
Dec. 31, 2021
Jun. 30, 2021
Dec. 31, 2020
Jun. 30, 2020
Dec. 31, 2019
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Participative Shareholders Debentures                  
Remuneration date Oct. 03, 2022 Apr. 01, 2022 Oct. 01, 2021 Apr. 01, 2021 Oct. 01, 2020 Apr. 01, 2020      
Remuneration paid to the participative stockholders debentures $ 137 $ 234 $ 225 $ 193 $ 79 $ 104 $ 371 $ 418 $ 183