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Liabilities related to associates and joint ventures (Details Narrative)
R$ in Millions, $ in Millions
 3 Months Ended 6 Months Ended 12 Months Ended
Mar. 31, 2023
USD ($)
Mar. 31, 2023
BRL (R$)
Jun. 30, 2023
USD ($)
Jun. 30, 2022
USD ($)
Jun. 30, 2023
USD ($)
Jun. 30, 2023
BRL (R$)
Jun. 30, 2022
USD ($)
Dec. 31, 2022
USD ($)
Dec. 31, 2022
BRL (R$)
IfrsStatementLineItems [Line Items]                  
Deferred income tax assets     $ 1,078   $ 1,078        
Capitalization of expenses               $ 699 R$ 3,371
Amount claim from federal public     $ 9,673 $ 11,157 18,107   $ 21,969    
Deposits of total amount $ 2,100 R$ 10,300              
Public Civil Claim Filed By Federal Government And Others [Member]                  
IfrsStatementLineItems [Line Items]                  
Amount claim from federal public         32,000 R$ 155,000      
Public Civil Claim Filed By Federal Government And Others [Member] | Tac Gov Agreement [Member]                  
IfrsStatementLineItems [Line Items]                  
Amount claim from federal public         32,000 155,000      
Public Civil Claim Filed By Federal Government And Others [Member] | Framework Agreement [Member]                  
IfrsStatementLineItems [Line Items]                  
Amount claim from federal public         $ 32,000 R$ 155,000