Consolidated Statement of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Operating Activities:
Net income	$ 1,980	$ 2,022	$ 2,050
Adjustments to reconcile net income to net cash used in operating activities:
Deferred income tax (benefit) expense	(168)	60	128
Amortization of other intangible assets	197	222	214
Other non-cash adjustments for depreciation, amortization and accretion, net	596	477	461
Losses (gains) related to investment securities, net	6	(4)	9
Change in trading account assets, net	75	(81)	(206)
Change in accrued interest and fees receivable, net	(104)	(119)	(153)
Change in collateral deposits, net	(6,662)	(4,362)	(4,046)
Change in unrealized losses (gains) on foreign exchange derivatives, net	982	(2,042)	(128)
Change in other assets, net	1,164	3,612	(819)
Change in accrued expenses and other liabilities, net	(48)	(635)	133
Other, net	579	289	333
Net cash used in operating activities	(1,403)	(561)	(2,024)
Investing Activities:
Net decrease (increase) in interest-bearing deposits with banks	18,185	(29,266)	(13,494)
Net (increase) decrease in securities purchased under resale agreements	(1,014)	3,840	(1,214)
Proceeds from sales of available for sale securities	12,309	9,766	10,261
Proceeds from maturities of available for sale securities	28,025	36,120	37,529
Purchases of available for sale securities	(25,397)	(43,146)	(39,097)
Proceeds from maturities of available for sale securities	3,842	3,217	2,080
Purchases of held to maturity securities	(9,398)	(3,778)	(8,415)
Net increase in loans	(561)	(4,785)	(1,214)
Purchases of equity investments and other long-term assets	(366)	(182)	(272)
Purchases of premises and equipment, net	(703)	(427)	(388)
Other, net	73	149	139
Net cash provided by (used in) investing activities	24,995	(28,492)	(14,085)
Financing Activities:
Net (decrease) increase in time deposits	(9,878)	54,404	(14,507)
Net (decrease) increase in all other deposits	(7,535)	(27,632)	32,594
Net (decrease) increase in other short-term borrowings	(7,074)	1,575	(1,155)
Proceeds from issuance of long-term debt, net of issuance costs	2,983	994	2,485
Payments for long-term debt and obligations under capital leases	(1,155)	(788)	(134)
Proceeds from issuance of preferred stock	742	1,470	0
Proceeds from exercises of common stock options	4	14	121
Purchases of common stock	(1,520)	(1,650)	(2,040)
Excess tax benefit related to stock-based compensation	70	72	50
Repurchases of common stock for employee tax withholding	(222)	(232)	(189)
Payments for cash dividends	(655)	(539)	(486)
Net cash (used in) provided by financing activities	(24,240)	27,688	16,739
Net (decrease) increase	(648)	(1,365)	630
Cash and due from banks at beginning of period	1,855	3,220	2,590
Cash and due from banks at end of period	1,207	1,855	3,220
Supplemental disclosure:
Interest paid	385	398	416
Income taxes paid, net	$ 211	$ 358	$ 406