Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Basic earnings per share
Net income	$ 57,048	$ 58,471	$ 49,552
Less: Preferred stock dividends	1,099	1,259	1,501
Net income applicable to common equity	55,949	57,212	48,051
Less: Dividends and undistributed earnings allocated to participating securities	268	344	291
Net income applicable to common stockholders	$ 55,681	$ 56,868	$ 47,760
Total weighted-average basic shares outstanding (in shares)	2,776.5	2,873.9	2,938.6
Net income per share (in dollars per share)	$ 20.05	$ 19.79	$ 16.25
Diluted earnings per share
Net income applicable to common stockholders	$ 55,681	$ 56,868	$ 47,760
Total weighted-average basic shares outstanding (in shares)	2,776.5	2,873.9	2,938.6
Add: Dilutive impact of unvested PSUs, nondividend-earning RSUs and SARs (in shares)	5.0	5.1	4.5
Total weighted-average diluted shares outstanding (in shares)	2,781.5	2,879.0	2,943.1
Net income per share (in dollars per share)	$ 20.02	$ 19.75	$ 16.23