Consolidated Statements of Changes in Stockholders' Equity (Unaudited) - USD ($) $ in Millions	Total	Preferred stock	Common stock	Additional paid-in capital	Retained earnings	Accumulated other comprehensive income/(loss)	Treasury stock, at cost
Beginning balance at Dec. 31, 2024		$ 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				(692)
Other				4
Net income	$ 14,643				14,643
Preferred stock dividends					(255)
Common stock dividends ($1.50 and $1.40 per share, respectively)					(3,938)
Other comprehensive income/(loss), after-tax	3,345					3,345
Repurchase							(7,611)
Reissuance							1,171
Ending balance at Mar. 31, 2025	351,420	20,045	4,105	90,223	386,616	(9,111)	(140,458)
Beginning balance at Dec. 31, 2025	362,438	20,045	4,105	91,114	416,055	(4,290)	(164,591)
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				(1,027)
Other				0
Net income	16,494				16,494
Preferred stock dividends					(276)
Common stock dividends ($1.50 and $1.40 per share, respectively)					(4,067)
Other comprehensive income/(loss), after-tax	(2,399)					(2,399)
Repurchase							(8,378)
Reissuance							1,253
Ending balance at Mar. 31, 2026	$ 364,038	$ 20,045	$ 4,105	$ 90,087	$ 428,206	$ (6,689)	$ (171,716)