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Earnings Per Share And Stockholders' Equity - Narrative (Details)
$ / shares in Units, $ in Millions
1 Months Ended
Oct. 15, 2020
USD ($)
Aug. 08, 2019
$ / shares
shares
Jul. 31, 2020
shares
Jun. 30, 2020
Apr. 30, 2020
shares
Mar. 31, 2020
Aug. 03, 2020
USD ($)
$ / shares
shares
Jun. 26, 2020
Class of Stock [Line Items]                
Volume weighted average price       90.00%   90.00%    
Volume weighted average price calculation period       10 days   10 days    
Common stock issued (in shares)     11,600,000   17,300,000      
Subsequent Event                
Class of Stock [Line Items]                
Payments of preferred stock dividends | $ $ 200              
Common Stock | Warrant                
Class of Stock [Line Items]                
Warrant, rate conversion               0.125
Warrants issued (in shares)             116,000,000  
Exercise price of warrant (usd per share) | $ / shares             $ 22.00  
Fair value of Common Stock Warrants | $             $ 767  
Anadarko | Series A Preferred Stock                
Class of Stock [Line Items]                
Issued as part of the Merger (in shares)   100,000            
Face value (in usd per share) | $ / shares   $ 100,000            
Preferred stock accrual rate per annum   8.00%            
Preferred stock accrual rate per annum on unpaid amounts   9.00%