Consolidated Statement of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Operating Activities:
Net income	$ 987	$ 823
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Deferred income tax (benefit) expense	(32)	52
Amortization of other intangible assets	98	99
Other non-cash adjustments for depreciation, amortization and accretion, net	362	285
(Gains) losses related to investment securities, net	(1)	4
Change in trading account assets, net	(41)	(449)
Change in accrued interest and fees receivable, net	(53)	(143)
Change in collateral deposits, net	2,612	(7,544)
Change in unrealized (gains) losses on foreign exchange derivatives, net	(139)	829
Change in other assets, net	(307)	28
Change in accrued expenses and other liabilities, net	1,343	1,331
Other, net	183	158
Net cash provided by (used in) operating activities	5,012	(4,527)
Investing Activities:
Net decrease (increase) in interest-bearing deposits with banks	169	(23,205)
Net decrease (increase) in securities purchased under resale agreements	1,394	(2,057)
Proceeds from sales of available-for-sale securities	305	9,634
Proceeds from maturities of available-for-sale securities	13,621	13,440
Purchases of available-for-sale securities	(15,981)	(14,991)
Proceeds from maturities of available-for-sale securities	2,344	1,889
Purchases of held-to-maturity securities	(2,649)	(622)
Net increase in loans and leases	(1,023)	(370)
Purchases of equity investments and other long-term assets	(214)	(298)
Purchases of premises and equipment, net	(328)	(301)
Other, net	76	44
Net cash used in investing activities	(2,286)	(16,837)
Financing Activities:
Net increase in time deposits	10,524	1,026
Net (decrease) increase in all other deposits	(9,021)	20,525
Net (decrease) increase in other short-term borrowings	(191)	2,422
Proceeds from issuance of long-term debt, net of issuance costs	1,492	0
Payments for long-term debt and obligations under capital leases	(1,420)	(930)
Proceeds from issuance of preferred stock, net	493	742
Proceeds from exercises of common stock options	0	4
Purchases of common stock	(715)	(783)
Excess tax benefit related to stock-based compensation	3	46
Repurchases of common stock for employee tax withholding	(72)	(151)
Payments for cash dividends	(353)	(308)
Net cash provided by financing activities	740	22,593
Net increase	3,466	1,229
Cash and due from banks at beginning of period	1,207	1,855
Cash and due from banks at end of period	$ 4,673	$ 3,084