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Lease liability (Details 2) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
IfrsStatementLineItems [Line Items]    
Discount rate 6.0085%  
Average Period 14 years 4 months 24 days  
Recoverable taxes $ 509  
Lease liabilities $ 37,149 $ 33,799
Scenario Previously Report [Member] | Vessels [Member]    
IfrsStatementLineItems [Line Items]    
Discount rate 5.2316%  
Average Period 4 years 6 months  
Recoverable taxes $ 243  
Lease liabilities $ 9,875 8,311
Scenario Previously Report [Member] | Others [Member]    
IfrsStatementLineItems [Line Items]    
Discount rate 5.235%  
Average Period 3 years 3 months 18 days  
Recoverable taxes $ 44  
Lease liabilities $ 440 264
After Readjustment [Member] | Vessels [Member] | Foreign countries [member]    
IfrsStatementLineItems [Line Items]    
Discount rate 5.7706%  
Average Period 3 years 3 months 18 days  
Lease liabilities $ 964 1,127
After Readjustment [Member] | Vessels [Member] | Country Of Brazil [Member]    
IfrsStatementLineItems [Line Items]    
Discount rate 11.0131%  
Average Period 2 years 4 months 24 days  
Recoverable taxes $ 138  
Lease liabilities $ 1,313 1,506
After Readjustment [Member] | Others [Member] | Country Of Brazil [Member]    
IfrsStatementLineItems [Line Items]    
Discount rate 11.5059%  
Average Period 4 years 6 months  
Recoverable taxes $ 62  
Lease liabilities $ 531 1,025
After Readjustment [Member] | Platforms [Member] | Foreign countries [member]    
IfrsStatementLineItems [Line Items]    
Discount rate 6.366%  
Average Period 18 years  
Lease liabilities $ 23,292 20,336
After Readjustment [Member] | Properties [Member] | Country Of Brazil [Member]    
IfrsStatementLineItems [Line Items]    
Discount rate 8.6458%  
Average Period 22 years 9 months 18 days  
Recoverable taxes $ 22  
Lease liabilities $ 734 $ 1,230