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Provision for decommissioning costs (Details) - USD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
IfrsStatementLineItems [Line Items]    
Provision for decommissioning costs $ 26,203  
Current 1,696 $ 2,032
Onshore [Member]    
IfrsStatementLineItems [Line Items]    
Provision for decommissioning costs 493 447
Shallow Waters [Member]    
IfrsStatementLineItems [Line Items]    
Provision for decommissioning costs 7,266 6,253
Deep And Ultradeep Postsalt [Member]    
IfrsStatementLineItems [Line Items]    
Provision for decommissioning costs 12,071 10,873
Pre Salt [Member]    
IfrsStatementLineItems [Line Items]    
Provision for decommissioning costs 6,373 5,630
Provision Total [Member]    
IfrsStatementLineItems [Line Items]    
Provision for decommissioning costs 26,203 23,203
Non-current $ 24,507 $ 21,171