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Provision for decommissioning costs (Details) - USD ($)
$ in Millions
Jun. 30, 2025
Dec. 31, 2024
IfrsStatementLineItems [Line Items]    
Current $ 2,514 $ 1,696
Onshore [Member]    
IfrsStatementLineItems [Line Items]    
Provision for decommissioning costs 559 493
Shallow Waters [Member]    
IfrsStatementLineItems [Line Items]    
Provision for decommissioning costs 8,382 7,266
Deep And Ultradeep Postsalt [Member]    
IfrsStatementLineItems [Line Items]    
Provision for decommissioning costs 13,458 12,071
Pre Salt [Member]    
IfrsStatementLineItems [Line Items]    
Provision for decommissioning costs 7,337 6,373
Provision Total [Member]    
IfrsStatementLineItems [Line Items]    
Provision for decommissioning costs 29,736 26,203
Non-current $ 27,222 $ 24,507