v3.22.0.1
Asset Acquisitions and Dispositions (Supplemental Pro Forma Financial Information) (Details) - USD ($)
$ / shares in Units, $ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Business Acquisition [Line Items]        
Total Revenues and Other Income $ 48,349   $ 19,256 $ 36,670
Income (Loss) before income taxes 12,712   (3,140) 9,524
Net Income (Loss) Attributable to ConocoPhillips $ 8,079   $ (2,701) $ 7,189
Basic net loss $ 6.09   $ (2.51) $ 6.43
Diluted net loss $ 6.07   $ (2.51) $ 6.40
Concho Resources Incorporated [Member]        
Business Acquisition [Line Items]        
Total Revenues and Other Income   $ 6,571    
Net Income (Loss) Attributable to ConocoPhillips   $ 2,330    
Proforma - Total revenues and other income     $ 3,762  
Proforma - Income (Loss) before income taxes     787  
Proforma - Net loss attributable to ConocoPhillips     498  
Shell Permian Assets [Member]        
Business Acquisition [Line Items]        
Proforma - Total revenues and other income $ 3,220   1,685  
Proforma - Income (Loss) before income taxes 1,201   (247)  
Proforma - Net loss attributable to ConocoPhillips 920   (189)  
Combined [Member]        
Business Acquisition [Line Items]        
Proforma - Total revenues and other income 51,569   24,703  
Proforma - Income (Loss) before income taxes 13,913   (2,600)  
Proforma - Net loss attributable to ConocoPhillips $ 8,999   $ (2,392)  
Proforma - Basic net loss $ 6.78   $ (1.75)  
Proforma - Diluted net loss $ 6.76   $ (1.75)