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Accounting policies (Details)
 12 Months Ended
Dec. 31, 2023
Plant and equipment | Bottom of range  
Disclosure of accounting policies  
Estimated, useful life 10 years
Plant and equipment | Top of range  
Disclosure of accounting policies  
Estimated, useful life 55 years
Pipelines, networks and lines | Bottom of range  
Disclosure of accounting policies  
Estimated, useful life 6 years
Pipelines, networks and lines | Top of range  
Disclosure of accounting policies  
Estimated, useful life 63 years
Buildings | Bottom of range  
Disclosure of accounting policies  
Estimated, useful life 9 years
Buildings | Top of range  
Disclosure of accounting policies  
Estimated, useful life 100 years
Other | Bottom of range  
Disclosure of accounting policies  
Estimated, useful life 3 years
Other | Top of range  
Disclosure of accounting policies  
Estimated, useful life 35 years