Consolidated Statement of Cash Flows (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013
Operating Activities
Net income (a)	$ 2,112	[1]	$ 2,110	[1]
Adjustments to reconcile net income to net cash provided (used) by operating activities
Provision for credit losses (benefit)	166		393
Depreciation and amortization	476		583
Deferred income taxes (a)	104	[1]	792	[1]
Net gains on sales of securities	(4)		(75)
Net other-than-temporary impairments	3		14
Changes in fair value of mortgage servicing rights	250		(254)
Gain on sale of Visa Class B common shares	(116)		(83)
Noncash charges on trust preferred securities redemptions			30
Undistributed earnings of BlackRock	(193)		(173)
Excess tax benefits from share-based payment arrangements	(36)		(18)
Net change in
Trading securities and other short-term investments	839		463
Loans held for sale	(99)		(755)
Other assets	(262)		133
Accrued expenses and other liabilities (a)	381	[1]	(1,281)	[1]
Other (a)	(151)	[1]	(83)	[1]
Net cash provided (used) by operating activities	3,470		1,796
Sales
Securities available for sale	3,359		3,814
Loans	1,295		888
Repayments/maturities
Securities available for sale	3,434		5,232
Securities held to maturity	992		1,191
Purchases
Securities available for sale	(3,608)		(6,785)
Securities held to maturity			(224)
Loans	(369)		(603)
Net change in
Federal funds sold and resale agreements	459		(155)
Interest-earning deposits with banks	(4,741)		187
Loans	(6,837)		(4,494)
Other (b)	(266)	[2]	306	[2]
Net cash provided (used) by investing activities	(6,282)		(643)
Net change in
Noninterest-bearing deposits	723		(3,226)
Interest-bearing deposits	928		2,409
Federal funds purchased and repurchase agreements	(1,156)		978
Commercial paper	(268)		(2,170)
Other borrowed funds	(494)		(153)
Sales/issuances
Federal Home Loan Bank borrowings	7,650		5,000
Bank notes and senior debt	3,636		2,442
Subordinated debt	745		744
Commercial paper	4,532		5,244
Other borrowed funds	380		402
Preferred stock issuance, value			496
Common and treasury stock	179		131
Repayments Maturities Financing [Abstract]
Federal Home Loan Bank borrowings	(5,539)		(5,956)
Bank notes and senior debt	(2,200)		(1,425)
Subordinated debt	22		(705)
Commercial paper	(4,262)		(5,127)
Other borrowed funds	(354)		(314)
Preferred stock			(150)
Excess tax benefits from share-based payment arrangements - financing	36		18
Redemption of noncontrolling interests			(375)
Acquisition of treasury stock	(291)		(23)
Preferred stock cash dividends paid	(115)		(118)
Common stock cash dividends paid	(491)		(444)
Net cash provided (used) by financing activities	3,661		(2,322)
Net Increase (Decrease) In Cash And Due From Banks	849		(1,169)
Cash and due from banks at beginning of period	4,043	[3]	5,220
Cash and due from banks at end of period	4,892	[3]	4,051
Supplemental Disclosures
Interest paid	418		440
Income taxes paid	551		214
Income taxes refunded	9		1
Non-cash Investing and Financing Items
Transfer from (to) loans to (from) loans held for sale, net	390		13
Transfer from loans to foreclosed assets	$ 315		$ 378

[1] Amounts for 2013 periods have been updated to reflect the first quarter 2014 adoption of Accounting Standards Update (ASU) 2014-01 related to investments in low income housing tax credits.

[2] (b) Includes the impact of the consolidation of a variable interest entity as of March 31, 2013.

[3] Amounts represent the assets or liabilities of consolidated variable interest entities (VIEs).