v3.21.2
Changes in Equity - Schedule of Changes in Equity (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Beginning Balance $ 44,276 $ 31,493 $ 29,849 $ 35,050
Net Income (Loss) 2,379 (450) 5,452 (1,883)
Other Comprehensive Income (Loss) (203) 159 95 (309)
Dividends paid (579) (454) (1,750) (1,367)
Dividends payable (609)   (609)  
Acquisition of Concho     13,125  
Repurchase of company common stock (1,243)   (2,224) (726)
Distributions to noncontrolling interests and other       (32)
Disposition       (84)
Distributed under benefit plans 94 34 176 130
Other   1 1 4
Ending Balance 44,115 30,783 44,115 30,783
Par Value - Common Stock [Member]        
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Beginning Balance 21 18 18 18
Acquisition of Concho     3  
Ending Balance 21 18 21 18
Capital in excess of par [Member]        
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Beginning Balance 60,337 47,079 47,133 46,983
Acquisition of Concho     13,122  
Distributed under benefit plans 94 34 176 130
Ending Balance 60,431 47,113 60,431 47,113
Treasury Stock [Member]        
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Beginning Balance (48,278) (47,130) (47,297) (46,405)
Repurchase of company common stock (1,243)   (2,224) (726)
Other       1
Ending Balance (49,521) (47,130) (49,521) (47,130)
Accum Other Comprehensive Income (Loss) [Member]        
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Beginning Balance (4,920) (5,825) (5,218) (5,357)
Other Comprehensive Income (Loss) (203) 159 95 (309)
Ending Balance (5,123) (5,666) (5,123) (5,666)
Retained Earnings [Member]        
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Beginning Balance 37,116 37,351 35,213 39,742
Net Income (Loss) 2,379 (450) 5,452 (1,929)
Dividends paid (579) (454) (1,750) (1,367)
Dividends payable (609)   (609)  
Other   1 1 2
Ending Balance $ 38,307 36,448 $ 38,307 36,448
Noncontrolling Interests [Member]        
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Beginning Balance       69
Net Income (Loss)       46
Distributions to noncontrolling interests and other       (32)
Disposition       (84)
Other       1
Ending Balance   $ 0   $ 0