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Net Earnings Per Share (Net Earnings (Loss) Per Share Computations from Continuing Operations) (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Earnings Per Share [Abstract]        
Net earnings available to common shareholders - basic $ 844 $ 687 $ 1,440 $ 1,674
Net earnings available to common shareholders - diluted $ 844 $ 687 $ 1,440 $ 1,674
Common shares:        
Average common shares outstanding - basic 626 638 628 641
Dilutive effect of potential common shares issuable 2 1 2 2
Average common shares outstanding - diluted 628 639 630 643
Net earnings per share available to common shareholders:        
Basic $ 1.35 $ 1.08 $ 2.29 $ 2.61
Diluted $ 1.34 $ 1.07 $ 2.29 $ 2.6