Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Operating activities
Net income	$ 24,442	$ 21,745	$ 17,886
Adjustments to reconcile net income to net cash provided by/(used in) operating activities:
Provision for credit losses	3,827	3,139	225
Depreciation and amortization	4,940	4,759	5,306
Deferred tax expense	1,333	4,362	8,139
Other Noncash Income (Expense)	1,785	2,113	1,552
Originations and purchases of loans held-for-sale	(48,109)	(67,525)	(75,928)
Proceeds from sales, securitizations and paydowns of loans held-for-sale	49,363	71,407	73,566
Net change in:
Trading assets	62,212	(24,814)	89,110
Securities borrowed	12,165	1,020	7,562
Accrued interest and accounts receivable	22,664	(3,637)	(2,340)
Other assets	(3,701)	(9,166)	526
Trading liabilities	(28,972)	26,818	(9,772)
Accounts payable and other liabilities	(23,361)	6,058	(5,750)
Other operating adjustments	(5,122)	314	(2,129)
Net cash provided by operating activities	73,466	36,593	107,953
Investing activities
Deposits with banks	144,462	(168,426)	(194,363)
Federal funds sold and securities purchased under resale agreements	3,190	30,848	47,726
Held-to-maturity securities:
Proceeds from paydowns and maturities	6,099	4,169	189
Purchases	(6,204)	(10,345)	(24,214)
Available-for-sale securities:
Proceeds from paydowns and maturities	76,448	90,664	89,631
Proceeds from sales	40,444	38,411	73,312
Purchases	(70,804)	(121,504)	(130,266)
Proceeds from sales and securitizations of loans held-for-investment	18,604	20,115	12,033
Other changes in loans, net	(108,962)	(51,749)	(23,721)
All other investing activities, net	3,703	2,181	(828)
Net cash provided by/(used in) investing activities	106,980	(165,636)	(150,501)
Net change in:
Deposits	(88,678)	89,346	81,476
Federal funds purchased and securities loaned or sold under repurchase agreements	(39,415)	10,905	(58,867)
Commercial paper and other borrowed funds	(57,828)	9,242	2,784
Beneficial interests issued by consolidated variable interest entities	(5,632)	(834)	(10,433)
Proceeds from long-term borrowings	79,611	78,515	83,546
Payments of long-term borrowings	(67,247)	(65,275)	(60,497)
Proceeds from issuance of preferred stock	5,893	8,847	3,873
Redemption of preferred stock	0	0	(1,800)
Treasury stock and warrants repurchased	(5,616)	(4,760)	(4,789)
Dividends paid	(7,873)	(6,990)	(6,056)
All other financing activities, net	(726)	(768)	(913)
Net cash provided by/(used in) financing activities	(187,511)	118,228	28,324
Effect of exchange rate changes on cash and due from banks	(276)	(1,125)	272
Net decrease in cash and due from banks	(7,341)	(11,940)	(13,952)
Cash and due from banks at the beginning of the period	27,831	39,771	53,723
Cash and due from banks at the end of the period	20,490	27,831	39,771
Cash interest paid	7,220	8,194	9,573
Cash income taxes paid, net	$ 9,423	$ 1,392	$ 3,502