Consolidated Statement Of Cash Flows (USD $) In Millions	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Operating Activities:
Net income	$ 1,539	$ 1,473
Adjustments to reconcile net income to net cash provided by operating activities:
Deferred income tax expense (benefit)	(96)	209
Amortization of other intangible assets	149	132
Other non-cash adjustments for depreciation, amortization and accretion	116	(360)
Gains related to investment securities, net	(25)	(62)
Change in trading account assets, net	(1,297)	(1,337)
Change in accrued income receivable	(199)	(270)
Change in collateral deposits, net	(1,919)	879
Change in trading liabilities, net	785	139
Other, net	(1,166)	189
Net cash (used in) provided by operating activities	(2,113)	992
Investing Activities:
Net (increase) decrease in interest-bearing deposits with banks	(14,250)	2,072
Net increase in securities purchased under resale agreements	(3,130)	(1,554)
Proceeds from sales of available-for-sale securities	11,056	17,634
Proceeds from maturities of available-for-sale securities	33,705	26,781
Purchases of available-for-sale securities	(58,901)	(49,443)
Proceeds from maturities of held-to-maturity securities	2,779	4,223
Purchases of held-to-maturity securities	(455)	(426)
Net increase in loans	(52)	(3,117)
Business acquisitions, net of cash acquired	(77)	(2,246)
Purchases of equity investments and other long-term assets	(69)	(95)
Purchases of premises and equipment	(209)	(157)
Other, net	280	326
Net cash used in investing activities	(29,323)	(6,002)
Financing Activities:
Net increase in time deposits	566	3,286
Net increase in all other deposits	36,087	11,686
Net increase (decrease) in short-term borrowings	1,606	(7,638)
Proceeds from issuance of long-term debt, net of issuance costs	1,986
Payments for long-term debt and obligations under capital leases	(2,474)	(335)
Proceeds from issuance of preferred stock	500
Proceeds from exercises of common stock options	40	8
Purchases of common stock	(450)
Repurchases of common stock for employee tax withholding	(60)	(40)
Proceeds from issuance of treasury stock for stock awards and options exercised	10
Payments for cash dividends	(199)	(15)
Net cash provided by financing activities	37,612	6,952
Net increase	6,176	1,942
Cash and due from banks at beginning of period	3,311	2,641
Cash and due from banks at end of period	$ 9,487	$ 4,583