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Accrued liabilities and provisions - Additional information (Details)
$ in Millions, $ in Millions
 3 Months Ended 12 Months Ended 48 Months Ended
Mar. 21, 2024
country
Sep. 07, 2023
USD ($)
Jun. 28, 2019
USD ($)
Mar. 16, 2018
USD ($)
May 25, 2016
USD ($)
Mar. 08, 2016
USD ($)
Mar. 31, 2024
USD ($)
Dec. 31, 2023
COP ($)
item
Dec. 31, 2023
USD ($)
item
Dec. 31, 2022
Dec. 31, 2020
USD ($)
Dec. 31, 2018
USD ($)
Jun. 28, 2019
COP ($)
Jun. 28, 2019
USD ($)
Mar. 16, 2018
COP ($)
Mar. 16, 2018
USD ($)
Apr. 28, 2017
COP ($)
Apr. 28, 2017
USD ($)
Disclosure of accrued liabilities and provisions [Line Items]                                    
Mandatory investments, natural resources               1.00% 1.00% 1.00%                
Minimum current plans executed | item               240 240                  
Percentage of forced investment               1.00% 1.00%                  
Minimum Percentage of Execution of Forced Obligation               1.00% 1.00%                  
Minimum historical execution amount               $ 90,000                    
Unidentified expenses                       $ 22            
Unidentified project cost                 $ 269                  
Legal proceedings in process, claims made, value         $ 213                          
Legal fees             $ 9                      
Number of former officials | item               8 8                  
Number of former presidents | item               3 3                  
Number of former financial vice-presidents | item               5 5                  
McDermott International Ltd                                    
Disclosure of accrued liabilities and provisions [Line Items]                                    
Number of countries the business group is having presence | country 54                                  
Vice President                                    
Disclosure of accrued liabilities and provisions [Line Items]                                    
Number of former officials being investigated | item               5 5                  
Refineria de Cartagena                                    
Disclosure of accrued liabilities and provisions [Line Items]                                    
Amount awarded to other party   $ 1,000                                
Dismissal of claim amount by Plaintif   $ 400                                
Number of former officials being investigated | item               8 8                  
Legal proceedings in process, claims made, value           $ 2,000                        
Contingent asset claim                             $ 432,303 $ 129    
Contingent asset claim invoices provisionally paid     $ 137 $ 139             $ 122              
Legal proceedings in process, claims made, value updated including interest                         $ 503,241 $ 137        
Contingent asset non detailed counterclaim                                 $ 387,558 $ 116
Contingent Asset Compliance Letter Of Credit                                   $ 70
Refineria de Cartagena | McDermott International Ltd                                    
Disclosure of accrued liabilities and provisions [Line Items]                                    
Percentage of preferred shares issued 19.90%                                  
Refineria de Cartagena | President                                    
Disclosure of accrued liabilities and provisions [Line Items]                                    
Number of former officials being investigated | item               3 3                  
Refineria de Cartagena                                    
Disclosure of accrued liabilities and provisions [Line Items]                                    
Percentage of shares acquired             19.90%                      
Refineria de Cartagena | Letters of credits one                                    
Disclosure of accrued liabilities and provisions [Line Items]                                    
Maximum credit loan             $ 70                      
Refineria de Cartagena | Letters of credits two                                    
Disclosure of accrued liabilities and provisions [Line Items]                                    
Maximum credit loan             $ 95                      
Exploration and Production [Member]                                    
Disclosure of accrued liabilities and provisions [Line Items]                                    
Discount rate applied to cash flow projections               5.02% 5.02% 5.30%                
Transport and logistics [Member]                                    
Disclosure of accrued liabilities and provisions [Line Items]                                    
Discount rate applied to cash flow projections               5.20% 5.20% 5.58%                
Refining and petrochemicals [Member]                                    
Disclosure of accrued liabilities and provisions [Line Items]                                    
Discount rate applied to cash flow projections               5.51% 5.51% 6.36%