Consolidated Statement of Cash Flows (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Operating Activities:
Net income	$ 1,545	$ 1,583
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Deferred income tax (benefit) expense	(17)	77
Amortization of other intangible assets	162	160
Other non-cash adjustments for depreciation, amortization and accretion, net	351	324
(Gains) losses related to investment securities, net	(4)	9
Change in trading account assets, net	(190)	(279)
Change in accrued interest and fees receivable, net	(195)	(124)
Change in collateral deposits, net	(3,533)	(2,765)
Change in unrealized losses on foreign exchange derivatives, net	(2,316)	1,304
Change in other assets, net	1,563	(888)
Change in accrued expenses and other liabilities, net	1,430	(279)
Other, net	240	303
Net cash used in operating activities	(964)	(575)
Investing Activities:
Net (increase) decrease in interest-bearing deposits with banks	(22,689)	12,127
Net decrease (increase) in securities purchased under resale agreements	3,627	(811)
Proceeds from sales of available-for-sale securities	8,205	8,090
Proceeds from maturities of available-for-sale securities	28,562	29,540
Purchases of available-for-sale securities	(35,393)	(29,005)
Proceeds from maturities of available-for-sale securities	2,383	1,474
Purchases of held-to-maturity securities	(3,271)	(6,424)
Net increase in loans	(4,927)	(3,304)
Purchases of equity investments and other long-term assets	(169)	(100)
Divestitures	0	18
Purchases of premises and equipment	(298)	(259)
Other, net	63	84
Net cash (used in) provided by investing activities	(23,907)	11,430
Financing Activities:
Net increase (decrease) in time deposits	6,266	(14,750)
Net increase in all other deposits	19,434	4,768
Net increase in short-term borrowings	1,957	967
Proceeds from issuance of long-term debt, net of issuance costs	0	1,492
Payments for long-term debt and obligations under capital leases	(779)	(127)
Proceeds from issuance of preferred stock	742	0
Proceeds from exercises of common stock options	10	109
Purchases of common stock	(1,240)	(1,480)
Repurchases of common stock for employee tax withholding	(197)	(163)
Payments for cash dividends	(396)	(365)
Net cash provided by (used in) financing activities	25,797	(9,549)
Net increase	926	1,306
Cash and due from banks at beginning of period	3,220	2,590
Cash and due from banks at end of period	$ 4,146	$ 3,896