Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 14,300	$ 2,865
Other comprehensive income/(loss), after–tax
Unrealized gains/(losses) on investment securities	(4,339)	1,119
Translation adjustments, net of hedges	(250)	(330)
Fair value hedges	(28)	88
Cash flow hedges	(2,249)	2,465
Defined benefit pension and OPEB plans	68	33
DVA on fair value option elected liabilities	(147)	2,474
Total other comprehensive income/(loss), after–tax	(6,945)	5,849
Comprehensive income	$ 7,355	$ 8,714