Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 49,552	$ 37,676	$ 48,334
Other comprehensive income/(loss), after–tax
Unrealized gains/(losses) on investment securities	5,381	(11,764)	(5,540)
Translation adjustments, net of hedges	329	(611)	(461)
Fair value hedges	(101)	98	(19)
Cash flow hedges	1,724	(5,360)	(2,679)
Defined benefit pension and OPEB plans	373	(1,241)	922
DVA on fair value option elected liabilities	(808)	1,621	(293)
Total other comprehensive income/(loss), after–tax	6,898	(17,257)	(8,070)
Comprehensive income	$ 56,450	$ 20,419	$ 40,264