v3.25.4
Acquisitions and Dispositions - Narrative (Details)
$ in Billions
 1 Months Ended 3 Months Ended 12 Months Ended
Nov. 22, 2024
USD ($)
shares
Oct. 04, 2023
USD ($)
Oct. 04, 2023
CAD ($)
Nov. 30, 2024
USD ($)
shares
Dec. 31, 2025
USD ($)
Jun. 30, 2025
USD ($)
Dec. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Dec. 31, 2025
USD ($)
Dec. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Oct. 31, 2024
Dec. 31, 2022
Business Combination [Line Items]                          
Operating revenues and other income                 $ 61,548,000,000 $ 56,953,000,000 $ 58,574,000,000    
Net Income (Loss)                 7,988,000,000 9,245,000,000 10,957,000,000    
Loss on forward contracts                 $ 11,000,000 (50,000,000) $ 92,000,000    
QatarEnergy LNG NFS3                          
Business Combination [Line Items]                          
Equity interest of ConocoPhillips         25.00%       25.00%       25.00%
North Field South | QatarEnergy LNG NFS3                          
Business Combination [Line Items]                          
Investment, ownership percentage                         25.00%
Port Arthur LNG                          
Business Combination [Line Items]                          
Equity interest of ConocoPhillips         30.00%     30.00% 30.00%   30.00%    
Port Arthur LNG | Sempra                          
Business Combination [Line Items]                          
Investment, ownership percentage               70.00%     70.00%    
Lower 48                          
Business Combination [Line Items]                          
Net Income (Loss)                 $ 5,264,000,000 5,175,000,000 $ 6,461,000,000    
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Certain Noncore Assets | Lower 48                          
Business Combination [Line Items]                          
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal, Statement of Income or Comprehensive Income [Extensible Enumeration]                 Gain (Loss) on Disposition of Property Plant Equipment        
Proceeds from sale of business                 $ 1,100,000,000        
Before-tax gain (loss) on disposition                 404,000,000        
Gain (loss) on disposal, net of tax                 310,000,000        
Net carrying value         $ 719,000,000       719,000,000        
Disposal group including discontinued operation, net carrying value, asset         770,000,000       770,000,000        
Disposal group including discontinued operation, net carrying value, PP&E         645,000,000       645,000,000        
Disposal group, including discontinued operation, liabilities         51,000,000       51,000,000        
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Anadarko Basin                          
Business Combination [Line Items]                          
Proceeds from sale of business         1,200,000,000                
Net carrying value         $ 1,200,000,000       $ 1,200,000,000        
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Ursa, Europa Fields, And Ursa Oil Pipeline Company LLC | Lower 48                          
Business Combination [Line Items]                          
Proceeds from sale of business           $ 699,000,000              
Before-tax gain (loss) on disposition           274,000,000              
Gain (loss) on disposal, net of tax           266,000,000              
Net carrying value           444,000,000              
Disposal group including discontinued operation, net carrying value, asset           536,000,000              
Disposal group including discontinued operation, net carrying value, PP&E           522,000,000              
Disposal group, including discontinued operation, liabilities           $ 92,000,000              
Marathon Oil Corporation                          
Business Combination [Line Items]                          
Total consideration $ 16,500,000,000     $ 16,507,000,000                  
Business acquisition, entity shares issued per acquiree share | shares 0.255     0.255                  
Proved properties $ 13,200,000,000                        
Unproved properties 10,800,000,000                        
Business acquisition, transaction-related costs             $ 587,000,000     587,000,000      
Business acquisition, employee severance expense 334,000,000                        
Operating revenues and other income                   677,000,000      
Net Income (Loss)                   $ 66,000,000      
Marathon Oil Corporation | Lower 48                          
Business Combination [Line Items]                          
Proved properties 12,100,000,000                        
Marathon Oil Corporation | Equatorial Guinea                          
Business Combination [Line Items]                          
Proved properties $ 1,100,000,000                        
Prudhoe Bay                          
Business Combination [Line Items]                          
Interest acquired             0.40%     0.40%      
Alaska Acquisition                          
Business Combination [Line Items]                          
Total consideration             $ 296,000,000            
Surmont                          
Business Combination [Line Items]                          
Total consideration   $ 3,000,000,000.0 $ 4.1                    
Proved properties   2,900,000,000                      
Unproved properties   $ 200,000,000                      
Operating revenues and other income               $ 572,000,000          
Net Income (Loss)               $ 119,000,000          
Interest acquired                       50.00%  
Interest subsequently acquired   100.00%                      
Surmont | Foreign Exchange Forward                          
Business Combination [Line Items]                          
Loss on forward contracts                     $ 112,000,000    
Kuparuk River Unit                          
Business Combination [Line Items]                          
Interest acquired             5.00%     5.00%