Variable Interest Entities and Securitization Activities - Assets and Liabilities by Balance Sheet Caption (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2018
Assets
Cash and due from banks	$ 35,721	$ 30,541	$ 36,641
Restricted cash	30,739	35,356	$ 33,202
Trading assets at fair value	277,423	266,299
Customer and other receivables	59,514	53,298
Goodwill	7,139	6,688
Intangible assets	2,211	2,163
Other assets	19,581	15,641
Total assets	902,604	853,531
Liabilities
Other secured financings	6,352	5,245
Other liabilities and accrued expenses	19,348	17,204
Total liabilities	819,054	772,125
Noncontrolling interests	1,168	1,160
Consolidated VIEs
Assets
Cash and due from banks	104	77
Restricted cash	173	171
Trading assets at fair value	374	314
Customer and other receivables	10	25
Goodwill	0	18
Intangible assets	114	128
Other assets	398	402
Total assets	1,173	1,135
Liabilities
Other secured financings	32	64
Other liabilities and accrued expenses	41	22
Total liabilities	73	86
Noncontrolling interests	$ 160	$ 106