v3.25.2
Acquisitions and Dispositions - Narrative (Details) - USD ($)
$ in Millions
1 Months Ended 3 Months Ended 6 Months Ended 7 Months Ended
Nov. 22, 2024
Nov. 30, 2024
Dec. 31, 2025
Jun. 30, 2025
Mar. 31, 2025
Jun. 30, 2025
Jun. 30, 2025
Business Combination [Line Items]              
Transaction-related costs       $ 17   $ 40 $ 585
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Certain Noncore Assets | Lower 48              
Business Combination [Line Items]              
Proceeds from sale of business         $ 581    
Before-tax gain (loss) on disposition         64    
Gain (loss) on disposal, net of tax         49    
Net carrying value         517    
Disposal group including discontinued operation, net carrying value, PP&E         553    
Disposal group, including discontinued operation, liabilities         $ 36    
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Ursa And Europa Fields, Ursa Oil Pipeline Company LLC, And Shell Pipeline Company LP | Lower 48              
Business Combination [Line Items]              
Proceeds from sale of business       718      
Before-tax gain (loss) on disposition       274      
Gain (loss) on disposal, net of tax       266      
Net carrying value       444   444 444
Disposal group including discontinued operation, net carrying value, assets       536   536 536
Disposal group including discontinued operation, net carrying value, PP&E       522   522 522
Disposal group, including discontinued operation, liabilities       $ 92   $ 92 $ 92
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Lower 48 Assets In Anadarko Basin | Subsequent Event | Forecast              
Business Combination [Line Items]              
Proceeds from sale of business     $ 1,300        
Marathon Oil Corporation              
Business Combination [Line Items]              
Total consideration $ 16,500 $ 16,507          
Common stock, number of Marathon Oil shares received for each share of ConocoPhillips common stock 0.255            
Proved properties $ 13,000            
Unproved properties 11,000            
Marathon Oil Corporation | Lower 48              
Business Combination [Line Items]              
Proved properties 12,000            
Marathon Oil Corporation | Equatorial Guinea              
Business Combination [Line Items]              
Proved properties $ 1,000