Earnings Per Common Share - Earnings Per Common Share (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Earnings Per Share [Abstract]
Net earnings to common	$ 2,962	$ 5,284	$ 9,579	$ 17,342
Weighted average basic shares (in shares)	352.8	348.3	353.0	351.8
Effect of dilutive RSUs (in shares)	6.4	5.6	5.6	5.1
Weighted average diluted shares (in shares)	359.2	353.9	358.6	356.9
Basic EPS (in dollars per share)	$ 8.35	$ 15.14	$ 27.03	$ 49.23
Diluted EPS (in dollars per share)	$ 8.25	$ 14.93	$ 26.71	$ 48.59