v3.21.1
Acquisitions and Dispositions - Acquisition of Concho Resources Inc. (Concho) - Textual (Details)
$ in Millions
3 Months Ended
Feb. 08, 2021
USD ($)
Jan. 15, 2021
USD ($)
Mar. 31, 2021
USD ($)
Mar. 31, 2020
USD ($)
Business Acquisition [Line Items]        
Other expenses     $ 24 $ (6)
Income tax provision     732 148
Sales and other operating revenues [Member] | Commodity Contract [Member]        
Business Acquisition [Line Items]        
Loss from commodity derivatives, before tax     279 (47)
Other Income [Member] | Commodity Contract [Member]        
Business Acquisition [Line Items]        
Loss from commodity derivatives, before tax     (17) (2)
Purchased commodities [Member] | Commodity Contract [Member]        
Business Acquisition [Line Items]        
Loss from commodity derivatives, before tax     $ (13) 27
Concho Resources Inc [Member]        
Business Acquisition [Line Items]        
Business Acquisition, Date of Acquisition Agreement   Jan. 15, 2021    
Business Acquisition, Name of Acquired Entity     Concho Resources Inc.  
Business Combination, Share Exchange Ratio   1.46    
Business Combination, Consideration Transferred   $ 13,125    
Capitalized Costs Proved Properties   11,900    
Capitalized Costs, Unproved Properties   $ 6,900    
Business Acquisition, Planned Restructuring Activities, Description     In the first quarter of 2021, we commenced a restructuring program, the scope of which included combining the operations of the two companies. For the three-month period ending March 31, 2021, we recognized non-recurring restructuring costs mainly for employee severance and related incremental pension benefit costs of approximately $134 million.  
Transaction related cost expensed     $ 157  
Restructuring Charges     134  
Income tax provision $ 75   75  
Net loss     (190) $ 390
Impairment of Oil and Gas Properties     10,500  
Goodwill, Impairment Loss     1,900  
Concho Resources Inc [Member] | Commodity Contract [Member]        
Business Acquisition [Line Items]        
Loss from commodity derivatives, before tax     305  
Net loss     132  
Concho Resources Inc [Member] | Sales and other operating revenues [Member] | Commodity Contract [Member]        
Business Acquisition [Line Items]        
Loss from commodity derivatives, before tax     173  
Concho Resources Inc [Member] | Sales and other operating revenues [Member] | Accelerated contracts [Member]        
Business Acquisition [Line Items]        
Loss from commodity derivatives, before tax     132  
Net loss     $ 101