Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Statement of Comprehensive Income [Abstract]
Net income	$ 24,733	$ 24,442	$ 21,745
Other comprehensive income/(loss), after–tax
Unrealized gains/(losses) on investment securities	(1,105)	(2,144)	1,975
Translation adjustments, net of hedges	(2)	(15)	(11)
Cash flow hedges	(56)	51	44
Defined benefit pension and OPEB plans	(28)	111	(1,018)
DVA on fair value option elected liabilities	(330)	0	0
Total other comprehensive income/(loss), after–tax	(1,521)	(1,997)	990
Comprehensive income	$ 23,212	$ 22,445	$ 22,735