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Property, plant and equipment (Details 2) - USD ($)
$ in Millions
Jun. 30, 2024
Dec. 31, 2023
IfrsStatementLineItems [Line Items]    
Right-of-use assets $ 26,422 $ 30,380
Gross carrying amount [member]    
IfrsStatementLineItems [Line Items]    
Right-of-use assets 40,499 44,829
Accumulated depreciation and amortisation [member]    
IfrsStatementLineItems [Line Items]    
Right-of-use assets (14,077) (14,449)
Platforms [Member]    
IfrsStatementLineItems [Line Items]    
Right-of-use assets 16,422 19,056
Platforms [Member] | Gross carrying amount [member]    
IfrsStatementLineItems [Line Items]    
Right-of-use assets 21,226 23,859
Platforms [Member] | Accumulated depreciation and amortisation [member]    
IfrsStatementLineItems [Line Items]    
Right-of-use assets (4,804) (4,803)
Vessels [Member]    
IfrsStatementLineItems [Line Items]    
Right-of-use assets 8,042 9,204
Vessels [Member] | Gross carrying amount [member]    
IfrsStatementLineItems [Line Items]    
Right-of-use assets 16,556 18,000
Vessels [Member] | Accumulated depreciation and amortisation [member]    
IfrsStatementLineItems [Line Items]    
Right-of-use assets (8,514) (8,796)
Properties [Member]    
IfrsStatementLineItems [Line Items]    
Right-of-use assets 1,958 2,120
Properties [Member] | Gross carrying amount [member]    
IfrsStatementLineItems [Line Items]    
Right-of-use assets 2,717 2,970
Properties [Member] | Accumulated depreciation and amortisation [member]    
IfrsStatementLineItems [Line Items]    
Right-of-use assets $ (759) $ (850)