Consolidated Statement of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Operating Activities:
Net income	$ 1,807	$ 1,550
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Deferred income tax (benefit)	(217)	31
Amortization of other intangible assets	160	153
Other non-cash adjustments for depreciation, amortization and accretion, net	636	517
Losses (gains) related to investment securities, net	39	(5)
Change in trading account assets, net	(111)	(214)
Change in accrued interest and fees receivable, net	(399)	(248)
Change in collateral deposits, net	(1,232)	(615)
Change in unrealized losses on foreign exchange derivatives, net	1,136	853
Change in other assets, net	(2,063)	(457)
Change in accrued expenses and other liabilities, net	1,733	399
Other, net	368	312
Net cash provided by operating activities	1,857	2,276
Investing Activities:
Net decrease in interest-bearing deposits with banks	9,979	(3,752)
Net (increase) decrease in securities purchased under resale agreements	(1,509)	962
Proceeds from sales of available-for-sale securities	7,122	424
Proceeds from maturities of available-for-sale securities	21,619	21,564
Purchases of available-for-sale securities	(20,891)	(22,625)
Proceeds from maturities of held-to-maturity securities	2,647	7,184
Purchases of held-to-maturity securities	(3,961)	(5,581)
Net (increase) in loans and leases	(3,859)	(2,678)
Business acquisitions	0	(437)
Purchases of equity investments and other long-term assets	(32)	(265)
Purchases of premises and equipment, net	(485)	(477)
Proceeds from sale of joint venture investment	172	0
Other, net	77	129
Net cash provided by (used in) investing activities	10,879	(5,552)
Financing Activities:
Net (decrease) increase in time deposits	(16,790)	9,077
Net increase (decrease) in all other deposits	8,890	(1,938)
Net (decrease) in other short-term borrowings	(865)	(476)
Proceeds from issuance of long-term debt, net of issuance costs	747	1,492
Payments for long-term debt and obligations under capital leases	(482)	(1,430)
Proceeds from issuance of preferred stock, net	0	493
Purchases of common stock	(942)	(1,029)
Excess tax benefit related to stock-based compensation	0	6
Repurchases of common stock for employee tax withholding	(101)	(95)
Payments for cash dividends	(577)	(541)
Other, net	9	0
Net cash (used in) provided by financing activities	(10,111)	5,559
Net increase	2,625	2,283
Cash and due from banks at beginning of period	1,314	1,207
Cash and due from banks at end of period	$ 3,939	$ 3,490