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Lawsuits, Claims, Commitments and Contingencies (Details) - USD ($)
$ in Millions
1 Months Ended 12 Months Ended
Mar. 26, 2021
Dec. 31, 2021
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Jun. 30, 2022
Federal            
Lawsuits, commitments and contingencies            
Potential cash tax           $ 1,200
State            
Lawsuits, commitments and contingencies            
Potential cash tax           28
Anadarko            
Lawsuits, commitments and contingencies            
Tentative cash tax refund       $ 881    
Potential accrued interest           $ 347
Arbitration filed by Andes Petroleum Ecuador Ltd            
Lawsuits, commitments and contingencies            
Proceeds from settlement       $ 1,000    
Recovery of amount awarded in settlement amount (as a percent)       60.00%    
Percentage of judgment amount claimed 40.00%   40.00%      
Own economic interest (as a percent)     60.00%      
Amount awarded to other party in litigation $ 391 $ 558        
Tronox Settlement            
Lawsuits, commitments and contingencies            
Payments for settlement         $ 5,200