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Accrued liabilities and provisions - Additional information (Details)
$ in Millions
 6 Months Ended
Mar. 21, 2024
USD ($)
shares
Jun. 30, 2024
employee
item
director
Disclosure of accrued liabilities and provisions [Line Items]    
Legal fees | $ $ 9  
McDermott International Ltd    
Disclosure of accrued liabilities and provisions [Line Items]    
Threshold maximum percentage of ownership interest considered for conversion of preferred stock into common stock 19.90%  
Refineria de Cartagena | Office of comptroller general    
Disclosure of accrued liabilities and provisions [Line Items]    
Number of former officials | item   8
Number of former presidents | item   3
Number of former financial vice-presidents | item   5
Refineria de Cartagena | Prosecutor's office, process 1    
Disclosure of accrued liabilities and provisions [Line Items]    
Number of former employees under investigate process | employee   3
Number of former board members under investigation process | director   1
Refineria de Cartagena | Prosecutor's office, process 2    
Disclosure of accrued liabilities and provisions [Line Items]    
Number of former employees under investigate process | employee   1
Number of former board members under investigation process | director   3
Refineria de Cartagena | Prosecutor's office, process 3    
Disclosure of accrued liabilities and provisions [Line Items]    
Number of ex-workers of who acted as ex-president in property and ex-president in charge | item   2
Refineria de Cartagena | Prosecutor's office, process 4    
Disclosure of accrued liabilities and provisions [Line Items]    
Number of former employees under investigate process | employee   1
Refineria de Cartagena | McDermott International Ltd    
Disclosure of accrued liabilities and provisions [Line Items]    
Number of stocks issued | shares 75,000  
Chicago Bridge and Iron Company | Prosecutor's office, process 1    
Disclosure of accrued liabilities and provisions [Line Items]    
Number of employees under investigation process | employee   2
Letters of credits one | Refineria de Cartagena    
Disclosure of accrued liabilities and provisions [Line Items]    
Maximum credit loan | $ $ 70  
Letters of credits two | Refineria de Cartagena    
Disclosure of accrued liabilities and provisions [Line Items]    
Maximum credit loan | $ $ 95