v3.20.4
Earnings Per Common Share - Earnings Per Common Share (Detail) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Earnings Per Share [Abstract]      
Net earnings to common $ 8,915 $ 7,897 $ 9,860
Weighted average basic shares 356.4 371.6 385.4
Effect of dilutive securities:      
RSUs 3.9 3.9 3.9
Stock options     0.9
Dilutive securities 3.9 3.9 4.8
Weighted average diluted shares 360.3 375.5 390.2
Basic EPS $ 24.94 $ 21.18 $ 25.53
Diluted EPS $ 24.74 $ 21.03 $ 25.27