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Property, plant and equipment (Details 2) - USD ($)
$ in Millions
Jun. 30, 2025
Dec. 31, 2024
IfrsStatementLineItems [Line Items]    
Right-of-use assets $ 36,458 $ 27,688
Platforms [Member]    
IfrsStatementLineItems [Line Items]    
Right-of-use assets 24,714 17,772
Vessels [Member]    
IfrsStatementLineItems [Line Items]    
Right-of-use assets 9,955 8,326
Properties [Member]    
IfrsStatementLineItems [Line Items]    
Right-of-use assets 1,789 1,590
Gross carrying amount [member]    
IfrsStatementLineItems [Line Items]    
Right-of-use assets 55,814 42,366
Gross carrying amount [member] | Platforms [Member]    
IfrsStatementLineItems [Line Items]    
Right-of-use assets 31,274 22,484
Gross carrying amount [member] | Vessels [Member]    
IfrsStatementLineItems [Line Items]    
Right-of-use assets 21,778 17,542
Gross carrying amount [member] | Properties [Member]    
IfrsStatementLineItems [Line Items]    
Right-of-use assets 2,762 2,340
Accumulated depreciation and amortisation [member]    
IfrsStatementLineItems [Line Items]    
Right-of-use assets (19,356) (14,678)
Accumulated depreciation and amortisation [member] | Platforms [Member]    
IfrsStatementLineItems [Line Items]    
Right-of-use assets (6,560) (4,712)
Accumulated depreciation and amortisation [member] | Vessels [Member]    
IfrsStatementLineItems [Line Items]    
Right-of-use assets (11,823) (9,216)
Accumulated depreciation and amortisation [member] | Properties [Member]    
IfrsStatementLineItems [Line Items]    
Right-of-use assets $ (973) $ (750)