Consolidated Statement of Cash Flows (Unaudited) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Operating Activities:
Net income	$ 1,043	$ 917
Adjustments to reconcile net income to net cash provided by operating activities:
Deferred income tax expense (benefit)	137	(55)
Amortization of other intangible assets	107	99
Other non-cash adjustments for depreciation, amortization and accretion	193	98
Losses related to investment securities, net	5	16
Change in trading account assets, net	(16)	101
Change in accrued income receivable, net	(85)	(92)
Change in collateral deposits, net	(3,596)	(2,998)
Change in unrealized losses on foreign exchange derivatives, net	(1,498)	348
Change in other assets, net	1,226	1,355
Change in trading liabilities, net	0	5
Change in accrued expenses and other liabilities, net	263	(824)
Other, net	74	(33)
Net cash used in operating activities	(2,147)	(1,063)
Investing Activities:
Net decrease in interest-bearing deposits with banks	5,980	27,741
Net increase in securities purchased under resale agreements	(553)	(1,099)
Proceeds from sales of available-for-sale securities	4,817	2,451
Proceeds from maturities of available-for-sale securities	20,336	21,653
Purchases of available-for-sale securities	(19,707)	(29,397)
Proceeds from maturities of available-for-sale securities	972	1,512
Purchases of held-to-maturity securities	(5,022)	(5)
Net increase in loans	(4,156)	(2,338)
Purchases of equity investments and other long-term assets	(90)	(53)
Divestitures	18	0
Purchases of premises and equipment	(228)	(143)
Other, net	66	69
Net cash provided by investing activities	2,433	20,391
Financing Activities:
Net increase (decrease) in time deposits	(14,481)	3,000
Net increase (decrease) in all other deposits	16,820	(16,516)
Net increase (decrease) in short-term borrowings	(378)	284
Proceeds from issuance of long-term debt, net of issuance costs	1,492	0
Payments for long-term debt and obligations under capital leases	(13)	(1,762)
Proceeds related to common stock awards and option exercises	460	329
Purchases of common stock	(920)	(480)
Repurchases of common stock for employee tax withholding	(135)	(69)
Payments for cash dividends	(242)	(219)
Net cash provided by (used in) financing activities	2,603	(15,433)
Net increase	2,889	3,895
Cash and due from banks at beginning of period	2,590	2,193
Cash and due from banks at end of period	$ 5,479	$ 6,088