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Acquisition of Noble Energy, Inc. (Details) - USD ($)
shares in Millions, $ in Millions
 12 Months Ended
Oct. 05, 2020
Dec. 31, 2021
Dec. 31, 2020
Business Acquisition [Line Items]      
Carrying amount of long-term debt   $ 25,676  
Noble      
Business Acquisition [Line Items]      
Consideration transferred $ 4,109    
Number of shares (in shares) 58    
Carrying amount of long-term debt $ 9,231    
Provisional measurement of assets acquired and liabilities assumed      
Current assets 1,105    
Investments and long-term receivables 1,282    
Properties (includes $14,935 for oil and gas properties) 16,703    
Other assets 607    
Total assets acquired 19,697    
Current liabilities 1,829    
Long-term debt and finance leases 9,231    
Deferred income taxes 2,355    
Other liabilities 1,394    
Total liabilities assumed 14,809    
Noncontrolling interest and redeemable noncontrolling interest 779    
Net assets acquired 4,109    
Oil and gas property $ 14,935    
Unaudited pro forma summary      
Sales and other operating revenues   96,980 $ 144,303
Net income   $ (9,890) $ 1,412