Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 11,687	$ 9,443	$ 37,935	$ 16,995
Other comprehensive income/(loss), after–tax
Unrealized gains/(losses) on investment securities	(434)	514	(4,099)	4,377
Translation adjustments, net of hedges	(187)	127	(373)	(61)
Fair value hedges	9	(69)	(42)	35
Cash flow hedges	(450)	(70)	(2,108)	2,629
Defined benefit pension and OPEB plans	6	(12)	83	14
DVA on fair value option elected liabilities	(551)	(339)	(484)	377
Total other comprehensive income/(loss), after–tax	(1,607)	151	(7,023)	7,371
Comprehensive income	$ 10,080	$ 9,594	$ 30,912	$ 24,366