Consolidated Statement of Cash Flows (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Operating Activities:
Net income	$ 985	$ 1,043
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Deferred income tax expense	19	137
Amortization of other intangible assets	108	107
Other non-cash adjustments for depreciation, amortization and accretion, net	228	193
(Gains) losses related to investment securities, net	(4)	5
Change in trading account assets, net	(98)	(16)
Change in accrued interest and fees receivable, net	(98)	(85)
Change in collateral deposits, net	(2,416)	(3,596)
Change in unrealized losses on foreign exchange derivatives, net	(121)	(1,498)
Change in other assets, net	(475)	1,246
Change in accrued expenses and other liabilities, net	2,140	398
Other, net	178	305
Net cash provided by (used in) operating activities	446	(1,761)
Investing Activities:
Net (increase) decrease in interest-bearing deposits with banks	(34,129)	5,980
Net decrease (increase) in securities purchased under resale agreements	2,549	(553)
Proceeds from sales of available-for-sale securities	2,842	4,817
Proceeds from maturities of available-for-sale securities	18,402	20,336
Purchases of available-for-sale securities	(19,624)	(19,707)
Proceeds from maturities of available-for-sale securities	1,350	972
Purchases of held-to-maturity securities	(2,220)	(5,022)
Net increase in loans	(3,327)	(4,156)
Purchases of equity investments and other long-term assets	(133)	(90)
Purchases of premises and equipment	(234)	(228)
Other, net	46	66
Net cash (used in) provided by investing activities	(34,478)	2,415
Financing Activities:
Net increase (decrease) in time deposits	9,841	(14,481)
Net increase in all other deposits	26,725	16,820
Net increase (decrease) in short-term borrowings	1,752	(378)
Proceeds from issuance of long-term debt, net of issuance costs	0	1,492
Payments for long-term debt and obligations under capital leases	(763)	(13)
Proceeds from issuance of preferred stock	742	0
Proceeds from exercises of common stock options	9	92
Purchases of common stock	(830)	(920)
Repurchases of common stock for employee tax withholding	(166)	(135)
Payments for cash dividends	(251)	(242)
Net cash provided by financing activities	37,059	2,235
Net increase	3,027	2,889
Cash and due from banks at beginning of period	3,220	2,590
Cash and due from banks at end of period	$ 6,247	$ 5,479