Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Operating activities
Net income	$ 17,028	$ 13,477
Adjustments to reconcile net income to net cash used in operating activities:
Provision for credit losses	2,375	2,530
Depreciation and amortization	3,724	2,968
Deferred tax (benefit)/expense	(216)	(161)
Other	1,611	1,163
Originations and purchases of loans held-for-sale	(43,141)	(58,119)
Proceeds from sales, securitizations and paydowns of loans held-for-sale	41,657	53,053
Net change in:
Trading assets	(42,859)	(22,914)
Securities borrowed	(3,132)	5,845
Accrued interest and accounts receivable	(8,083)	(11,940)
Other assets	(716)	11,212
Trading liabilities	21,997	(12,827)
Accounts payable and other liabilities	12,574	(10,497)
Other operating adjustments	(2,243)	7,724
Net cash provided by/(used in) operating activities	576	(18,486)
Net change in:
Federal funds sold and securities purchased under resale agreements	(28,109)	11,364
Held-to-maturity securities:
Proceeds from paydowns and maturities	1,458	2,289
Purchases	(7,426)	0
Available-for-sale securities:
Proceeds from paydowns and maturities	19,718	29,481
Proceeds from sales	25,228	42,972
Purchases	(27,453)	(45,613)
Proceeds from sales and securitizations of loans held-for-investment	12,963	7,762
Other changes in loans, net	(33,441)	(24,266)
All other investing activities, net	(1,912)	550
Net cash provided by/(used in) investing activities	(38,974)	24,539
Net change in:
Deposits	10,100	53,122
Federal funds purchased and securities loaned or sold under repurchase agreements	16,396	(43)
Short-term borrowings	12,151	18,222
Beneficial interests issued by consolidated VIEs	(165)	(1,067)
Proceeds from long-term borrowings	41,166	35,530
Payments of long-term borrowings	(50,171)	(47,743)
Treasury stock repurchased	(9,639)	(5,839)
Dividends paid	(4,716)	(4,386)
All other financing activities, net	(1,356)	115
Net cash provided by financing activities	13,766	47,911
Effect of exchange rate changes on cash and due from banks and deposits with banks	(1,492)	5,408
Net increase/(decrease) in cash and due from banks and deposits with banks	(26,124)	59,372
Cash and due from banks and deposits with banks at the beginning of the period	431,304	391,154
Cash and due from banks and deposits with banks at the end of the period	405,180	450,526
Cash interest paid	9,151	6,322
Cash income taxes paid, net	$ 3,906	$ 1,736