Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Millions	Total	Preferred stock	Common stock	Additional paid-in capital	Retained earnings	Retained earnings Cumulative effect of change in accounting principles	Accumulated other comprehensive income/(loss)	Treasury stock, at cost
Beginning balance at Dec. 31, 2022		$ 27,404	$ 4,105	$ 89,044	$ 296,456	$ 449	$ (17,341)	$ (107,336)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance		0
Redemption		0
Shares issued and commitments to issue common stock for employee share-based compensation awards, and related tax effects				1,084
Other				0
Net income	$ 49,552				49,552
Preferred stock dividends					(1,501)
Common stock dividends ($5.80, $4.80 and $4.10 per share for 2025, 2024 and 2023, respectively)					(12,055)
Other comprehensive income/(loss), after-tax	6,898						6,898
Repurchase			(9,898)					(9,980)
Reissuance								1,099
Ending balance at Dec. 31, 2023	327,878	27,404	4,105	90,128	332,901	$ (161)	(10,443)	(116,217)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance		2,496
Redemption		(9,850)
Shares issued and commitments to issue common stock for employee share-based compensation awards, and related tax effects				768
Other				15
Net income	58,471				58,471
Preferred stock dividends					(1,259)
Common stock dividends ($5.80, $4.80 and $4.10 per share for 2025, 2024 and 2023, respectively)					(13,786)
Other comprehensive income/(loss), after-tax	(2,013)						(2,013)
Repurchase			(18,841)					(19,007)
Reissuance								1,206
Ending balance at Dec. 31, 2024	344,758	20,050	4,105	90,911	376,166		(12,456)	(134,018)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance		2,995
Redemption		(3,000)
Shares issued and commitments to issue common stock for employee share-based compensation awards, and related tax effects				220
Other				(17)
Net income	57,048				57,048
Preferred stock dividends					(1,099)
Common stock dividends ($5.80, $4.80 and $4.10 per share for 2025, 2024 and 2023, respectively)					(16,060)
Other comprehensive income/(loss), after-tax	8,166						8,166
Repurchase			(31,640)					(31,924)
Reissuance								1,351
Ending balance at Dec. 31, 2025	$ 362,438	$ 20,045	$ 4,105	$ 91,114	$ 416,055		$ (4,290)	$ (164,591)