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Close-down, restoration and environmental provisions - Undiscounted close-down and environmental restoration obligation (Details) - USD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Disclosure of other provisions [Line Items]    
Undiscounted close-down, restoration and environmental obligations $ 23,038 $ 23,372
Impact of discounting (7,307) (6,222)
Total closure obligation 15,731 17,150
Due within 1 year    
Disclosure of other provisions [Line Items]    
Undiscounted close-down, restoration and environmental obligations 1,183 1,523
Between 1 and 3 years    
Disclosure of other provisions [Line Items]    
Undiscounted close-down, restoration and environmental obligations 2,497 2,365
Between 3 and 5 years    
Disclosure of other provisions [Line Items]    
Undiscounted close-down, restoration and environmental obligations 1,880 2,005
Later than five years    
Disclosure of other provisions [Line Items]    
Undiscounted close-down, restoration and environmental obligations 17,478 17,479
Australia    
Disclosure of other provisions [Line Items]    
Total closure obligation 8,546 9,187
US    
Disclosure of other provisions [Line Items]    
Total closure obligation 4,419 4,682
Canada    
Disclosure of other provisions [Line Items]    
Total closure obligation 1,517 1,722
Other countries    
Disclosure of other provisions [Line Items]    
Total closure obligation 1,249 1,559
Decommissioning, decontamination and demolition    
Disclosure of other provisions [Line Items]    
Total closure obligation 3,065 3,591
Closure and rehabilitation earthworks    
Disclosure of other provisions [Line Items]    
Total closure obligation 4,628 4,609
Long-term water management costs    
Disclosure of other provisions [Line Items]    
Total closure obligation 1,316 1,236
Post-closure monitoring and maintenance    
Disclosure of other provisions [Line Items]    
Total closure obligation 1,581 1,806
Indirect costs, owners' costs and contingency    
Disclosure of other provisions [Line Items]    
Total closure obligation 5,141 5,908
Operating sites    
Disclosure of other provisions [Line Items]    
Total closure obligation 11,715 12,021
Non-operating sites    
Disclosure of other provisions [Line Items]    
Total closure obligation $ 4,016 $ 5,129