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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
Mar. 31, 2023
Mar. 31, 2022
Net earnings:    
Net earnings $ 995 $ 989
Attributable to participating securities (8) (16)
Basic and diluted earnings $ 987 $ 973
Common shares:    
Common shares outstanding - total 651 663
Attributable to participating securities (6) (7)
Common shares outstanding - basic 645 656
Dilutive effect of potential common shares issuable 2 2
Common shares outstanding - diluted 647 658
Net earnings per share:    
Basic $ 1.53 $ 1.48
Diluted $ 1.53 $ 1.48