Consolidated Statement of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Operating Activities:
Net income	$ 502	$ 368
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Deferred income tax (benefit)	(3)	(23)
Amortization of other intangible assets	52	49
Other non-cash adjustments for depreciation, amortization and accretion, net	212	183
Losses (gains) related to investment securities, net	40	(2)
Change in trading account assets, net	79	(24)
Change in accrued interest and fees receivable, net	(46)	(25)
Change in collateral deposits, net	(68)	(776)
Change in unrealized losses on foreign exchange derivatives, net	2,334	2,366
Change in other assets, net	(1,606)	(874)
Change in accrued expenses and other liabilities, net	1,908	1,293
Other, net	105	317
Net cash provided by operating activities	3,509	2,852
Investing Activities:
Net decrease in interest-bearing deposits with banks	4,146	10,306
Net (increase) in securities purchased under resale agreements	(225)	(318)
Proceeds from sales of available-for-sale securities	2,165	226
Proceeds from maturities of available-for-sale securities	6,836	6,544
Purchases of available-for-sale securities	(6,287)	(6,947)
Proceeds from maturities of held-to-maturity securities	670	618
Purchases of held-to-maturity securities	(1,311)	(1,782)
Net (increase) in loans and leases	(2,769)	(378)
Purchases of equity investments and other long-term assets	(18)	(80)
Purchases of premises and equipment, net	(164)	(168)
Proceeds from sale of joint venture investment	172	0
Other, net	(5)	6
Net cash provided by investing activities	3,210	8,027
Financing Activities:
Net (decrease) increase in time deposits	(5,793)	3,087
Net increase (decrease) in all other deposits	2,095	(9,202)
Net (decrease) in other short-term borrowings	(805)	(323)
Payments for long-term debt and obligations under capital leases	(11)	(1,410)
Purchases of common stock	(354)	(268)
Excess tax benefit related to stock-based compensation	0	3
Repurchases of common stock for employee tax withholding	(55)	(54)
Payments for cash dividends	(201)	(184)
Net cash used in financing activities	(5,124)	(8,351)
Net increase	1,595	2,528
Cash and due from banks at beginning of period	1,314	1,207
Cash and due from banks at end of period	$ 2,909	$ 3,735