Wells Fargo & Company (WFC) 10-Q 6 May 15 2015 Q1 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	3 Months Ended
	Mar. 31, 2015	Apr. 30, 2015
Document and Entity Information [Abstract]
Entity Registrant Name	WELLS FARGO & COMPANY/MN
Entity Central Index Key	72971
Document Type	10-Q
Document Period End Date	31-Mar-15
Amendment Flag	FALSE
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q1
Current Fiscal Year End Date	-19
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		5,149,204,973

Consolidated_Statement_of_Inco

Consolidated Statement of Income (Unaudited) (USD $)	3 Months Ended
In Millions, except Per Share data, unless otherwise specified	Mar. 31, 2015		Mar. 31, 2014
Interest income
Trading assets	$445		$374
Investment securities	2,144		2,110
Mortgages held for sale	177		170
Loans held for sale	5		2
Loans	8,938		8,746
Other interest income	254		210
Total interest income	11,963		11,612
Interest expense
Deposits	258		279
Short-term borrowings	18		12
Long-term debt	604		619
Other interest expense	97		87
Total interest expense	977		997
Net interest income	10,986		10,615
Provision for credit losses	608		325
Net interest income after provision for credit losses	10,378		10,290
Noninterest income
Service charges on deposit accounts	1,215		1,215
Trust and investment fees	3,677		3,412
Card fees	871		784
Other fees	1,078		1,047
Mortgage banking	1,547		1,510
Insurance	430		432
Net gains from trading activities	408		432
Net gains on debt securities	278	[1]	83	[1]
Net gains from equity investments	370	[2]	847	[2]
Lease income	132		133
Other	286		115
Total noninterest income	10,292		10,010
Noninterest expense
Salaries	3,851		3,728
Commission and incentive compensation	2,685		2,416
Employee benefits	1,477		1,372
Equipment	494		490
Net occupancy	723		742
Core deposit and other intangibles	312		341
FDIC and other deposit assessments	248		243
Other	2,717		2,616
Total noninterest expense	12,507		11,948
Income before income tax expense	8,163		8,352
Income tax expense	2,279		2,277
Net income before noncontrolling interests	5,884		6,075
Less: Net income from noncontrolling interests	80		182
Wells Fargo net income	5,804		5,893
Less: Preferred stock dividends and other	343		286
Wells Fargo net income applicable to common stock	$5,461		$5,607
Per share information
Earnings per common share (in dollars per share)	$1.06		$1.07
Diluted earnings per common share (in dollars per share)	$1.04		$1.05
Dividends declared per common share (in dollars per share)	$0.35		$0.30
Average common shares outstanding (in shares)	5,160.40		5,262.80
Diluted average common shares outstanding (in shares)	5,243.60		5,353.30
[1]	Total other-than-temporary impairment (OTTI) losses (reversal of losses) were $(6) million and $(14) million for first quarter 2015 and 2014, respectively. Of total OTTI, losses of $31 million and $7 million were recognized in earnings, and reversal of losses of $(37) million and $(21) million were recognized as non-credit-related OTTI in other comprehensive income for first quarter 2015 and 2014, respectively.
[2]	Includes OTTI losses of $42 million and $128 million for first quarter 2015 and 2014, respectively.

Consolidated_Statement_of_Inco1

Consolidated Statement of Income (Unaudited) (Parenthetical) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Noninterest income
Total recorded as part of gross realized losses	$31	$9
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net, Available-for-sale Equity Securities and Nonmarketable Equity Securities	42	128
Total debt securities [Member]
Noninterest income
Total OTTI losses (reversal of losses) recorded on debt securities	-6	-14
Total recorded as part of gross realized losses	31	7
Total reversal of losses recognized in OCI as non-credit-related impairment	($37)	($21)

Consolidated_Statement_of_Comp

Consolidated Statement of Comprehensive Income (Unaudited) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Statement of Comprehensive Income [Abstract]
Wells Fargo net income	$5,804	$5,893
Investment securities:
Net unrealized gains arising during the period	393	2,725
Reclassification of net gains to net income	-300	-394
Derivatives and hedging activities:
Net unrealized gains arising during the period	952	44
Reclassification of net gains on cash flow hedges to net income	-234	-106
Defined benefit plans adjustments:
Net actuarial losses arising during the period	-11	0
Amortization of net actuarial loss, settlements and other to net income	43	18
Foreign currency translation adjustments:
Net unrealized losses arising during the period	-55	-17
Reclassification of net losses to net income	0	6
Other comprehensive income, before tax	788	2,276
Income tax expense related to other comprehensive income	-228	-831
Other comprehensive income, net of tax	560	1,445
Less: Other comprehensive income from noncontrolling interests	301	79
Wells Fargo other comprehensive income, net of tax	259	1,366
Wells Fargo comprehensive income	6,063	7,259
Comprehensive income from noncontrolling interests	381	261
Total comprehensive income	$6,444	$7,520

Consolidated_Balance_Sheet

Consolidated Balance Sheet (USD $)	Mar. 31, 2015		Dec. 31, 2014
In Millions, unless otherwise specified
Assets
Cash and due from banks	$19,793		$19,571
Federal funds sold, securities purchased under resale agreements and other short-term investments	291,317		258,429
Trading assets	79,278		78,255
Investment securities:
Available-for-sale, at fair value	257,603		257,442
Held-to-maturity, at cost (fair value $68,781 and $56,359)	67,133		55,483
Mortgages held for sale (includes $19,015 and $15,565 carried at fair value)	23,606	[1]	19,536	[1]
Loans held for sale (includes $1 and $1 carried at fair value)	681	[1]	722	[1]
Loans (includes $5,730 and $5,788 carried at fair value)	861,231	[1]	862,551	[1]
Allowance for loan losses	-12,176		-12,319
Net loans	849,055		850,232
Mortgage servicing rights:
Measured at fair value	11,739		12,738
Amortized	1,252		1,242
Premises and equipment, net	8,696		8,743
Goodwill	25,705		25,705
Other assets (includes $2,549 and $2,512 carried at fair value)	101,879	[1]	99,057	[1]
Total assets	1,737,737	[2]	1,687,155	[2]
Liabilities
Noninterest-bearing deposits	335,858		321,963
Interest-bearing deposits	860,805		846,347
Total deposits	1,196,663		1,168,310
Short-term borrowings	77,697		63,518
Accrued expenses and other liabilities	90,121		86,122
Long-term debt	183,292		183,943
Total liabilities	1,547,773	[3]	1,501,893	[3]
Wells Fargo stockholders' equity:
Preferred stock	21,998		19,213
Common stock – $1-2/3 par value, authorized 9,000,000,000 shares; issued 5,481,811,474 and 5,481,811,474 shares	9,136		9,136
Additional paid-in capital	59,980		60,537
Retained earnings	110,676		107,040
Cumulative other comprehensive income	3,777		3,518
Treasury stock – 318,869,849 shares and 311,462,276 shares	-14,556		-13,690
Unearned ESOP shares	-2,215		-1,360
Total Wells Fargo stockholders' equity	188,796		184,394
Noncontrolling interests	1,168		868
Total equity	189,964		185,262
Total liabilities and equity	$1,737,737		$1,687,155
[1]	Parenthetical amounts represent assets and liabilities for which we have elected the fair value option.
[2]	Our consolidated assets at March 31, 2015, and December 31, 2014, include the following assets of certain variable interest entities (VIEs) that can only be used to settle the liabilities of those VIEs: Cash and due from banks, $155 million and $117 million; Investment securities, $749 million and $875 million; Net loans, $4.8 billion and $4.5 billion; Other assets, $314 million and $316 million, and Total assets, $6.0 billion and 5.8 billion, respectively.
[3]	Our consolidated liabilities at March 31, 2015, and December 31, 2014, include the following VIE liabilities for which the VIE creditors do not have recourse to Wells Fargo: Accrued expenses and other liabilities, $48 million and $49 million; Long-term debt, $1.6 billion and $1.6 billion; and Total liabilities, $1.6 billion and $1.7 billion, respectively.

Consolidated_Balance_Sheet_Par

Consolidated Balance Sheet (Parenthetical) (USD $)	Mar. 31, 2015		Dec. 31, 2014
Assets
Cash and due from banks	$19,793,000,000		$19,571,000,000
Investment securities	326,384,000,000		313,801,000,000
Held-to-maturity, at fair value	68,781,000,000		56,359,000,000
Mortgages held for sale, carried at fair value	19,015,000,000		15,565,000,000
Loans held for sale, carried at fair value	1,000,000		1,000,000
Mortgages held for sale (includes $19,015 and $15,565 carried at fair value) (1)	5,730,000,000		5,788,000,000
Net loans	849,055,000,000		850,232,000,000
Other assets	101,879,000,000	[1]	99,057,000,000	[1]
Other assets, carried at fair value	2,549,000,000		2,512,000,000
Total assets	1,737,737,000,000	[2]	1,687,155,000,000	[2]
Liabilities
Accrued expenses and other liabilities	90,121,000,000		86,122,000,000
Long-term debt	183,292,000,000		183,943,000,000
Total liabilities	1,547,773,000,000	[3]	1,501,893,000,000	[3]
Wells Fargo stockholders' equity:
Common stock, par value	$1.67		$1.67
Common stock, shares issued	5,481,811,474		5,481,811,474
Common stock, shares authorized	9,000,000,000		9,000,000,000
Treasury stock, shares	318,869,849		311,462,276
VIEs that we consolidate [Member]
Assets
Cash and due from banks	155,000,000		117,000,000
Investment securities	749,000,000		875,000,000
Net loans	4,800,000,000		4,500,000,000
Other assets	314,000,000		316,000,000
Total assets	6,048,000,000		5,817,000,000
Liabilities
Accrued expenses and other liabilities	48,000,000		49,000,000
Long-term debt	1,562,000,000		1,628,000,000
Total liabilities	1,610,000,000		1,677,000,000
Vies That We Consolidate No Recourse [Member]
Liabilities
Accrued expenses and other liabilities	48,000,000		49,000,000
Long-term debt	1,600,000,000		1,600,000,000
Total liabilities	$1,600,000,000		$1,700,000,000
[1]	Parenthetical amounts represent assets and liabilities for which we have elected the fair value option.
[2]	Our consolidated assets at March 31, 2015, and December 31, 2014, include the following assets of certain variable interest entities (VIEs) that can only be used to settle the liabilities of those VIEs: Cash and due from banks, $155 million and $117 million; Investment securities, $749 million and $875 million; Net loans, $4.8 billion and $4.5 billion; Other assets, $314 million and $316 million, and Total assets, $6.0 billion and 5.8 billion, respectively.
[3]	Our consolidated liabilities at March 31, 2015, and December 31, 2014, include the following VIE liabilities for which the VIE creditors do not have recourse to Wells Fargo: Accrued expenses and other liabilities, $48 million and $49 million; Long-term debt, $1.6 billion and $1.6 billion; and Total liabilities, $1.6 billion and $1.7 billion, respectively.

Consolidated_Statement_of_Chan

Consolidated Statement of Changes in Equity (Unaudited) (USD $)		Total	Total Wells Fargo stockholders' equity [Member]	Preferred stock [Member]	Common stock [Member]	Additional paid-in capital [Member]	Retained Earnings [Member]	Cumulative other comprehensive income [Member]	Treasury stock [Member]	Unearned ESOP Shares [Member]	Noncontrolling interests [Member]
In Millions, except Share data, unless otherwise specified
Beginning Balance at Dec. 31, 2013		$171,008	$170,142	$16,267	$9,136	$60,296	$92,361	$1,386	($8,104)	($1,200)	$866
Beginning balance, shares at Dec. 31, 2013				10,881,195	5,257,162,705
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		5,893	5,893				5,893
Net income attributable to noncontrolling interests		182									182
Net income		6,075
Other comprehensive income (loss) attributable to parent, net of tax		1,366	1,366					1,366
Other comprehensive income (loss) attributable to noncontrolling interest, net of tax		79									79
Other comprehensive income, net of tax		1,445
Noncontrolling interests, adjustments to Additional Paid in Capital			-1			-1
Noncontrolling interests											-312
Total change in noncontrolling interests		-313
Common stock issued		994	994			-185			1,179
Common stock, shares issued					35,873,142
Common stock repurchased		-1,025	-1,025			500			-1,525
Common stock repurchased, shares					-33,500,073
Preferred stock issued to ESOP		0	0	1,217		108				-1,325
Preferred stock issued to ESOP, shares				1,217,000
Preferred stock released by ESOP		305	305			-27				332
Preferred stock converted to common shares		0	0	-305		75			230
Preferred stock converted to common shares, shares				-305,336	6,190,932
Common stock warrants repurchased/exercised		0	0
Preferred stock issued		0	0
Preferred stock, shares issued
Common stock dividends		-1,579	-1,579			22	-1,601
Preferred stock dividends		-285	-285				-285
Tax benefit from stock incentive compensation		269	269			269
Stock incentive compensation expense		374	374			374
Net change in deferred compensation and related plans		-799	-799			-813			14
Net change		5,461	5,512	912	0	322	4,007	1,366	-102	-993	-51
Net change, shares				911,664	8,564,001
Ending Balance at Mar. 31, 2014		176,469	175,654	17,179	9,136	60,618	96,368	2,752	-8,206	-2,193	815
Ending balance, shares at Mar. 31, 2014				11,792,859	5,265,726,706
Beginning Balance at Dec. 31, 2014		185,262	184,394	19,213	9,136	60,537	107,040	3,518	-13,690	-1,360	868
Beginning balance, shares at Dec. 31, 2014				11,138,818	5,170,349,198
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		5,804	5,804				5,804
Net income attributable to noncontrolling interests		80									80
Net income		5,884
Other comprehensive income (loss) attributable to parent, net of tax		259	259					259
Other comprehensive income (loss) attributable to noncontrolling interest, net of tax		301									301
Other comprehensive income, net of tax		560
Noncontrolling interests, adjustments to Additional Paid in Capital			1			1
Noncontrolling interests											-81
Total change in noncontrolling interests		-80
Common stock issued		1,327	1,327			-342			1,669
Common stock, shares issued					40,259,205
Common stock repurchased		-2,592	-2,592						-2,592
Common stock repurchased, shares	[1]				-48,426,207
Preferred stock issued to ESOP		0	0	826		74				-900
Preferred stock issued to ESOP, shares				826,598
Preferred stock released by ESOP		41	41			-4				45
Preferred stock converted to common shares		0	0	-41		7			34
Preferred stock converted to common shares, shares				-41,313	759,429
Common stock warrants repurchased/exercised		-8	-8			-8
Preferred stock issued		1,997	1,997	2,000		-3
Preferred stock, shares issued				80,000
Common stock dividends		-1,805	-1,805			19	-1,824
Preferred stock dividends		-344	-344				-344
Tax benefit from stock incentive compensation		354	354			354
Stock incentive compensation expense		376	376			376
Net change in deferred compensation and related plans		-1,008	-1,008			-1,031			23
Net change		4,702	4,402	2,785	0	-557	3,636	259	-866	-855	300
Net change, shares				865,285	-7,407,573
Ending Balance at Mar. 31, 2015		$189,964	$188,796	$21,998	$9,136	$59,980	$110,676	$3,777	($14,556)	($2,215)	$1,168
Ending balance, shares at Mar. 31, 2015				12,004,103	5,162,941,625
[1]	For the first three months of 2015, includes $750 million related to a private forward repurchase transaction entered into in first quarter 2015 that settled in second quarter 2015 for 14.0 million shares of common stock.

Consolidated_Statement_of_Chan1

Consolidated Statement of Changes in Equity (Unaudited) (Parenthetical) (Private Forward Repurchase Transaction [Member], USD $)	1 Months Ended
	Apr. 30, 2015	Mar. 31, 2015	Jan. 31, 2015
Consolidated Statement of Changes in Equity (Textuals) [Abstract]
Private forward repurchase contract		$750,000,000	$750,000,000
Subsequent Event [Member]
Consolidated Statement of Changes in Equity (Textuals) [Abstract]
Common stock repurchased, shares	14,000,000

Consolidated_Statement_of_Cash

Consolidated Statement of Cash Flows (Unaudited) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Cash flows from operating activities:
Net income before noncontrolling interests	$5,884	$6,075
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses	608	325
Changes in fair value of MSRs, MHFS and LHFS carried at fair value	725	410
Depreciation, amortization and accretion	727	571
Other net gains	-2,301	-351
Stock-based compensation	708	692
Excess tax benefits related to stock incentive compensation	-354	-269
Originations of MHFS	-41,628	-29,798
Proceeds from sales of and principal collected on mortgages originated for sale	31,266	26,480
Proceeds from sales of and principal collected on LHFS	6	121
Purchases of LHFS	-23	-96
Net change in:
Trading assets	5,777	4,190
Deferred income taxes	-435	408
Accrued interest receivable	-300	-139
Accrued interest payable	76	221
Other assets	-2,053	-3,545
Other accrued expenses and liabilities	3,832	-2,454
Net cash provided by operating activities	2,515	2,841
Net change in:
Federal funds sold, securities purchased under resale agreements and other short-term investments	-33,026	-8,878
Available-for-sale securities:
Sales proceeds	4,230	877
Prepayments and maturities	7,004	7,709
Purchases	-14,634	-6,178
Held-to-maturity securities:
Paydowns and maturities	1,204	1,566
Purchases	-8,068	-7,276
Nonmarketable equity investments:
Sales proceeds	598	943
Purchases	-281	-945
Loans:
Loans originated by banking subsidiaries, net of principal collected	-2,584	-10,628
Proceeds from sales (including participations) of loans held for investment	2,596	3,592
Purchases (including participations) of loans	-1,109	-1,189
Principal collected on nonbank entities’ loans	2,328	3,266
Loans originated by nonbank entities	-2,223	-2,936
Proceeds from sales of foreclosed assets and short sales	1,874	2,212
Net cash from purchases and sales of MSRs	-21	-40
Other, net	-812	-320
Net cash used by investing activities	-42,924	-18,225
Net change in:
Deposits	28,591	15,399
Short-term borrowings	14,174	3,808
Long-term debt:
Proceeds from issuance	5,286	3,110
Repayment	-5,640	-4,214
Preferred stock:
Proceeds from issuance	1,997	0
Cash dividends paid	-364	-352
Common stock:
Proceeds from issuance	614	617
Repurchased	-2,592	-1,025
Cash dividends paid	-1,762	-1,545
Excess tax benefits related to stock incentive compensation	354	269
Net change in noncontrolling interests	-47	-923
Other, net	20	52
Net cash provided by financing activities	40,631	15,196
Net change in cash and due from banks	222	-188
Cash and due from banks at beginning of period	19,571	19,919
Cash and due from banks at end of period	19,793	19,731
Supplemental cash flow disclosures:
Cash paid for interest	901	776
Cash paid for income taxes	$352	$81

Summary_of_Significant_Account

Summary of Significant Accounting Policies	3 Months Ended
	Mar. 31, 2015
Accounting Policies [Abstract]
Summary of Significant Accounting Policies
	Note 1:  Summary of Significant Accounting Policies
	Wells Fargo & Company is a diversified financial services company. We provide banking, insurance, trust and investments, mortgage banking, investment banking, retail banking, brokerage, and consumer and commercial finance through banking stores, the internet and other distribution channels to consumers, businesses and institutions in all 50 states, the District of Columbia, and in foreign countries. When we refer to “Wells Fargo,” “the Company,” “we,” “our” or “us,” we mean Wells Fargo & Company and Subsidiaries (consolidated). Wells Fargo & Company (the Parent) is a financial holding company and a bank holding company. We also hold a majority interest in a real estate investment trust, which has publicly traded preferred stock outstanding.
	Our accounting and reporting policies conform with U.S. generally accepted accounting principles (GAAP) and practices in the financial services industry. For discussion of our significant accounting policies, see Note 1 (Summary of Significant Accounting Policies) in our Annual Report on Form 10-K for the year ended December 31, 2014 (2014 Form 10-K). There were no material changes to these policies in first quarter 2015. To prepare the financial statements in conformity with GAAP, management must make estimates based on assumptions about future economic and market conditions (for example, unemployment, market liquidity, real estate prices, etc.) that affect the reported amounts of assets and liabilities at the date of the financial statements and income and expenses during the reporting period and the related disclosures. Although our estimates contemplate current conditions and how we expect them to change in the future, it is reasonably possible that actual conditions could be worse than anticipated in those estimates, which could materially affect our results of operations and financial condition. Management has made significant estimates in several areas, including allowance for credit losses and purchased credit-impaired (PCI) loans (Note 5 (Loans and Allowance for Credit Losses)), valuations of residential mortgage servicing rights (MSRs) (Note 7 (Securitizations and Variable Interest Entities) and Note 8 (Mortgage Banking Activities)) and financial instruments (Note 13 (Fair Values of Assets and Liabilities)), and income taxes. Actual results could differ from those estimates.
	These unaudited interim financial statements reflect all adjustments that are, in the opinion of management, necessary for a fair statement of the results for the periods presented. These adjustments are of a normal recurring nature, unless otherwise disclosed in this Form 10-Q. The results of operations in the interim financial statements do not necessarily indicate the results that may be expected for the full year. The interim financial information should be read in conjunction with our 2014 Form 10-K.
	Accounting Standards Adopted in 2015
	In first quarter 2015, we adopted the following new accounting guidance:
	•	Accounting Standards Update (ASU or Update) 2014-11, Transfers and Servicing (Topic 860): Repurchase-to-Maturity Transactions, Repurchase Financings, and Disclosures;
	•	ASU 2014-08, Presentation of Financial Statements (Topic 205) and Property, Plant, and Equipment (Topic 360): Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity; and
	•	ASU 2014-01, Investments - Equity Method and Joint Ventures (Topic 323): Accounting for Investments in Qualified Affordable Housing Projects.
	ASU 2014-11 requires repurchase-to-maturity transactions to be accounted for as secured borrowings versus sales. The guidance also requires separate accounting for transfers of financial assets that are executed contemporaneously with repurchase agreements. The Update also includes new disclosures for transfers accounted for as sales and for repurchase agreements and similar arrangements, such as classes of collateral pledged for gross obligations and the remaining contractual maturity of repurchase agreements. We adopted the accounting changes in first quarter 2015 with no impact to our consolidated financial statements or disclosures. The collateral and remaining contractual maturity disclosures for repurchase and similar agreements are required in second quarter 2015.
	ASU 2014-08 changes the definition and reporting requirements for discontinued operations. Under the new guidance, an entity’s disposal of a component or group of components must be reported in discontinued operations if the disposal is a strategic shift that has or will have a significant effect on the entity’s operations and financial results. We adopted these changes in first quarter 2015 with prospective application. This Update did not have a material impact on our consolidated financial statements.
	ASU 2014-01 amends the accounting guidance for investments in affordable housing projects that qualify for the low-income housing tax credits. The Update requires incremental disclosures for all entities that invest in qualified affordable housing projects. Additionally companies may make an accounting election to amortize the cost of their investments in proportion to the tax benefits received if certain criteria are met and present the amortization as a component of income tax expense. We adopted the new disclosure requirements in first quarter 2015 (see Note 6 (Other Assets)) and will continue our previous accounting for these investments rather than make the alternative election to amortize the initial cost of the investments in proportion to the tax benefits received.
	Private Share Repurchases
	From time to time we enter into private forward repurchase transactions with unrelated third parties to complement our open-market common stock repurchase strategies, to allow us to manage our share repurchases in a manner consistent with our capital plans, currently submitted under the 2015 Comprehensive Capital Analysis and Review (CCAR), and to provide an economic benefit to the Company.
	Our payments to the counterparties for these contracts are recorded in permanent equity in the quarter paid and are not subject to re-measurement. The classification of the up-front payments as permanent equity assures that we have appropriate repurchase timing consistent with our 2015 Capital Plan, which contemplated a fixed dollar amount available per quarter for share repurchases pursuant to Federal Reserve Board (FRB) supervisory guidance. In return, the counterparty agrees to deliver a variable number of shares based on a per share discount to the volume-weighted average stock price over the contract period. There are no scenarios where the contracts would not either physically settle in shares or allow us to choose the settlement method. Our total number of outstanding shares of common stock is not reduced until settlement of the private share repurchase contract.
	In January 2015, we entered into a $750 million private forward repurchase contract with an unrelated third party. This contract settled in April 2015 for 14.0 million shares of common stock. We did not have any unsettled private share repurchase contracts at March 31, 2014.
	SUPPLEMENTAL CASH FLOW INFORMATION  Significant noncash activities are presented below.
		Quarter ended March 31,
	(in millions)	2015		2014
	Trading assets retained from securitization of MHFS	$	6,874	5,348
	Transfers from loans to MHFS	2,202		2,602
	Transfers from loans to foreclosed and other assets	911		1,216
	Transfers from available-for-sale to held-to-maturity securities	4,972		—
	SUBSEQUENT EVENTS  We have evaluated the effects of events that have occurred subsequent to March 31, 2015, and there have been no material events that would require recognition in our first quarter 2015 consolidated financial statements or disclosure in the Notes to the consolidated financial statements.

Business_Combinations

Business Combinations	3 Months Ended
	Mar. 31, 2015
Business Combinations [Abstract]
Business Combinations
	Note 2:  Business Combinations
	We regularly explore opportunities to acquire financial services companies and businesses. Generally, we do not make a public announcement about an acquisition opportunity until a definitive agreement has been signed. For information on additional contingent consideration related to acquisitions, which is considered to be a guarantee, see Note 10 (Guarantees, Pledged Assets and Collateral).
	We completed no acquisitions during first quarter 2015 and had no business combinations pending as of March 31, 2015.

Federal_Funds_Sold_Securities_

Federal Funds Sold, Securities Purchased under Resale Agreements and Other Short-Term Investments	3 Months Ended
	Mar. 31, 2015
Federal Funds Sold, Securities Purchased under Resale Agreements and Other Short-Term Investments [Abstract]
Federal Funds Sold, Securities Purchased under Resale Agreements and Other Short-Term Investments
	Note 3:  Federal Funds Sold, Securities Purchased under Resale Agreements and Other Short-Term Investments
	The following table provides the detail of federal funds sold, securities purchased under short-term resale agreements (generally less than one year) and other short-term investments. The majority of interest-earning deposits at March 31, 2015 and December 31, 2014 , were held at the Federal Reserve.
	(in millions)	Mar 31,		Dec 31
		2015		2014
	Federal funds sold and securities purchased under resale agreements	$	40,161	36,856
	Interest-earning deposits	250,354		219,220
	Other short-term investments	802		2,353
	Total	$	291,317	258,429
	As part of maintaining our memberships in certain clearing organizations, we are required to stand ready to provide liquidity meant to sustain market clearing activity in the event unforeseen events occur or are deemed likely to occur. This includes commitments we have entered into to purchase securities under resale agreements from a central clearing organization that, at its option, require us to provide funding under such agreements. We do not have any outstanding amounts funded, and the amount of our unfunded contractual commitment was $1.9 billion and $2.6 billion as of March 31, 2015 and December 31, 2014, respectively.
	We have classified securities purchased under long-term resale agreements (generally one year or more), which totaled $14.8 billion and $14.9 billion at March 31, 2015 and December 31, 2014 , respectively, in loans. For additional information on the collateral we receive from other entities under resale agreements and securities borrowings, see the “Offsetting of Resale and Repurchase Agreements and Securities Borrowing and Lending Agreements” section of Note 10 (Guarantees, Pledged Assets and Collateral).

Investment_Securities

Investment Securities	3 Months Ended
	Mar. 31, 2015
Investments, Debt and Equity Securities [Abstract]
Investment Securities
	Note 4:  Investment Securities
	The following table provides the amortized cost and fair value by major categories of available-for-sale securities, which are carried at fair value, and held-to-maturity debt securities, which are carried at amortized cost. The net unrealized gains (losses) for available-for-sale securities are reported on an after-tax basis as a component of cumulative OCI.
	(in millions)	Amortized Cost			Gross		Gross			Fair
					unrealized		unrealized			value
					gains		losses
	March 31, 2015
	Available-for-sale securities:
	Securities of U.S. Treasury and federal agencies	$	29,782		282		(33	)		30,031
	Securities of U.S. states and political subdivisions	46,973			1,342		(935	)		47,380
	Mortgage-backed securities:
	Federal agencies	100,222			3,256		(261	)		103,217
	Residential	7,790			951		(18	)		8,723
	Commercial	15,415			627		(53	)		15,989
	Total mortgage-backed securities	123,427			4,834		(332	)		127,929
	Corporate debt securities	14,508			767		(142	)		15,133
	Collateralized loan and other debt obligations (1)	27,352			448		(78	)		27,722
	Other (2)	5,715			213		(24	)		5,904
	Total debt securities	247,757			7,886		(1,544	)		254,099
	Marketable equity securities:
	Perpetual preferred securities	1,601			163		(72	)		1,692
	Other marketable equity securities	318			1,495		(1	)		1,812
	Total marketable equity securities	1,919			1,658		(73	)		3,504
	Total available-for-sale securities	249,676			9,544		(1,617	)		257,603
	Held-to-maturity securities:
	Securities of U.S. Treasury and federal agencies	44,244			1,441		(9	)		45,676
	Securities of U.S. states and political subdivisions	2,092			30		(1	)		2,121
	Federal agency mortgage-backed securities	14,311			182		(21	)		14,472
	Collateralized loans and other debt obligations (1)	1,404			1		(2	)		1,403
	Other (2)	5,082			27		—			5,109
	Total held-to-maturity securities	67,133			1,681		(33	)		68,781
	Total	$	316,809		11,225		(1,650	)		326,384
	December 31, 2014
	Available-for-sale securities:
	Securities of U.S. Treasury and federal agencies	$	25,898		44		(138	)		25,804
	Securities of U.S. states and political subdivisions	43,939			1,504		(499	)		44,944
	Mortgage-backed securities:
	Federal agencies	107,850			2,990		(751	)		110,089
	Residential	8,213			1,080		(24	)		9,269
	Commercial	16,248			803		(57	)		16,994
	Total mortgage-backed securities	132,311			4,873		(832	)		136,352
	Corporate debt securities	14,211			745		(170	)		14,786
	Collateralized loan and other debt obligations (1)	25,137			408		(184	)		25,361
	Other (2)	6,251			295		(27	)		6,519
	Total debt securities	247,747			7,869		(1,850	)		253,766
	Marketable equity securities:
	Perpetual preferred securities	1,622			148		(70	)		1,700
	Other marketable equity securities	284			1,694		(2	)		1,976
	Total marketable equity securities	1,906			1,842		(72	)		3,676
	Total available-for-sale securities	249,653			9,711		(1,922	)		257,442
	Held-to-maturity securities:
	Securities of U.S. Treasury and federal agencies	40,886			670		(8	)		41,548
	Securities of U.S. states and political subdivisions	1,962			27		—			1,989
	Federal agency mortgage-backed securities	5,476			165		—			5,641
	Collateralized loans and other debt obligations (1)	1,404			—		(13	)		1,391
	Other (2)	5,755			35		—			5,790
	Total held-to-maturity securities	55,483			897		(21	)		56,359
	Total	$	305,136		10,608		(1,943	)		313,801
	-1	The available-for-sale portfolio includes collateralized debt obligations (CDOs) with a cost basis and fair value of $363 million and $487 million, respectively, at March 31, 2015, and $364 million and $500 million, respectively, at December 31, 2014. The held-to-maturity portfolio only includes collateralized loan obligations.
	-2	The “Other” category of available-for-sale securities mostly includes asset-backed securities collateralized by credit cards, student loans, home equity loans and auto leases or loans and cash. Included in the “Other” category of held-to-maturity securities are asset-backed securities collateralized by auto leases or loans and cash with both a cost basis and fair value of $3.1 billion at March 31, 2015, and $3.8 billion at December 31, 2014. Also included in the “Other” category of held-to-maturity securities are asset-backed securities collateralized by dealer floorplan loans with a cost basis of $1.9 billion and fair value of $2.0 billion at both March 31, 2015 and December 31, 2014.
	Gross Unrealized Losses and Fair Value
	The following table shows the gross unrealized losses and fair value of securities in the investment securities portfolio by length of time that individual securities in each category have been in a continuous loss position. Debt securities on which we have taken credit-related OTTI write-downs are categorized as being “less than 12 months” or “12 months or more” in a continuous loss position based on the point in time that the fair value declined to below the cost basis and not the period of time since the credit-related OTTI write-down.
		Less than 12 months					12 months or more						Total
	(in millions)	Gross			Fair		Gross			Fair			Gross			Fair
unrealized		value	unrealized		value		unrealized			value
losses			losses				losses
March 31, 2015
Available-for-sale securities:
Securities of U.S. Treasury and federal agencies	$	(7	)	1,722		(26	)		4,013			(33	)		5,735
Securities of U.S. states and political subdivisions	(579		)	17,860		(356	)		3,685			(935	)		21,545
Mortgage-backed securities:
Federal agencies	(73		)	14,416		(188	)		11,410			(261	)		25,826
Residential	(12		)	919		(6	)		260			(18	)		1,179
Commercial	(11		)	2,312		(42	)		1,490			(53	)		3,802
Total mortgage-backed securities	(96		)	17,647		(236	)		13,160			(332	)		30,807
Corporate debt securities	(91		)	1,464		(51	)		723			(142	)		2,187
Collateralized loan and other debt obligations	(17		)	6,079		(61	)		3,949			(78	)		10,028
Other	(20		)	843		(4	)		239			(24	)		1,082
Total debt securities	(810		)	45,615		(734	)		25,769			(1,544	)		71,384
Marketable equity securities:
Perpetual preferred securities	(3		)	82		(69	)		615			(72	)		697
Other marketable equity securities	(1		)	16		—			—			(1	)		16
Total marketable equity securities	(4		)	98		(69	)		615			(73	)		713
Total available-for-sale securities	(814		)	45,713		(803	)		26,384			(1,617	)		72,097
Held-to-maturity securities:
Securities of U.S. Treasury and federal agencies	(9		)	1,529		—			—			(9	)		1,529
Securities of U.S. states and political subdivisions	(1		)	298		—			—			(1	)		298
Federal agency mortgage-backed securities	(21		)	8,100		—			—			(21	)		8,100
Collateralized loan and other debt obligations	(2		)	1,229		—			—			(2	)		1,229
Total held-to-maturity securities	(33		)	11,156		—			—			(33	)		11,156
Total	$	(847	)	56,869		(803	)		26,384			(1,650	)		83,253
December 31, 2014
Available-for-sale securities:
Securities of U.S. Treasury and federal agencies	$	(16	)	7,138		(122	)		5,719			(138	)		12,857
Securities of U.S. states and political subdivisions	(198		)	10,228		(301	)		3,725			(499	)		13,953
Mortgage-backed securities:
Federal agencies	(16		)	1,706		(735	)		37,854			(751	)		39,560
Residential	(18		)	946		(6	)		144			(24	)		1,090
Commercial	(9		)	2,202		(48	)		1,532			(57	)		3,734
Total mortgage-backed securities	(43		)	4,854		(789	)		39,530			(832	)		44,384
Corporate debt securities	(102		)	1,674		(68	)		1,265			(170	)		2,939
Collateralized loan and other debt obligations	(99		)	12,755		(85	)		3,958			(184	)		16,713
Other	(23		)	708		(4	)		277			(27	)		985
Total debt securities	(481		)	37,357		(1,369	)		54,474			(1,850	)		91,831
Marketable equity securities:
Perpetual preferred securities	(2		)	92		(68	)		633			(70	)		725
Other marketable equity securities	(2		)	41		—			—			(2	)		41
Total marketable equity securities	(4		)	133		(68	)		633			(72	)		766
Total available-for-sale securities	(485		)	37,490		(1,437	)		55,107			(1,922	)		92,597
Held-to-maturity securities:
Securities of U.S. Treasury and federal agencies	(8		)	1,889		—			—			(8	)		1,889
Collateralized loan and other debt obligations	(13		)	1,391		—			—			(13	)		1,391
Total held-to-maturity securities	(21		)	3,280		—			—			(21	)		3,280
Total	$	(506	)	40,770		(1,437	)		55,107			(1,943	)		95,877
We have assessed each security with gross unrealized losses included in the previous table for credit impairment. As part of that assessment we evaluated and concluded that we do not intend to sell any of the securities and that it is more likely than not that we will not be required to sell prior to recovery of the amortized cost basis. For debt securities, we evaluate, where necessary, whether credit impairment exists by comparing the present value of the expected cash flows to the securities’ amortized cost basis. For equity securities, we consider numerous factors in determining whether impairment exists, including our intent and ability to hold the securities for a period of time sufficient to recover the cost basis of the securities.
For descriptions of the factors we consider when analyzing securities for impairment, see Note 1 (Summary of Significant Accounting Policies) and Note 5 (Investment Securities) to Financial Statements in our 2014 Form 10-K. There have been no material changes to our methodologies for assessing impairment in the first three months of 2015.
The following table shows the gross unrealized losses and fair value of debt and perpetual preferred investment securities by those rated investment grade and those rated less than investment grade, according to their lowest credit rating by Standard & Poor’s Rating Services (S&P) or Moody’s Investors Service (Moody’s). Credit ratings express opinions about the credit quality of a security. Securities rated investment grade, that is those rated BBB- or higher by S&P or Baa3 or higher by Moody’s, are generally considered by the rating agencies and market participants to be low credit risk. Conversely, securities rated below investment grade, labeled as “speculative grade” by the rating agencies, are considered to be distinctively higher credit risk than investment grade securities. We have also included securities not rated by S&P or Moody’s in the table below based on our internal credit grade of the securities (used for credit risk management purposes) equivalent to the credit rating assigned by major credit agencies. The unrealized losses and fair value of unrated securities categorized as investment grade based on internal credit grades were $25 million and $2.1 billion, respectively, at March 31, 2015, and $25 million and $1.6 billion, respectively, at December 31, 2014. If an internal credit grade was not assigned, we categorized the security as non-investment grade.
	Investment grade					Non-investment grade
(in millions)	Gross			Fair		Gross			Fair
	unrealized			value		unrealized			value
	losses					losses
March 31, 2015
Available-for-sale securities:
Securities of U.S. Treasury and federal agencies	$	(33	)	5,735		—			—
Securities of U.S. states and political subdivisions	(895		)	21,229		(40	)		316
Mortgage-backed securities:
Federal agencies	(261		)	25,826		—			—
Residential	(1		)	134		(17	)		1,045
Commercial	(25		)	3,423		(28	)		379
Total mortgage-backed securities	(287		)	29,383		(45	)		1,424
Corporate debt securities	(16		)	1,186		(126	)		1,001
Collateralized loan and other debt obligations	(68		)	9,947		(10	)		81
Other	(20		)	847		(4	)		235
Total debt securities	(1,319		)	68,327		(225	)		3,057
Perpetual preferred securities	(72		)	697		—			—
Total available-for-sale securities	(1,391		)	69,024		(225	)		3,057
Held-to-maturity securities:
Securities of U.S. Treasury and federal agencies	(9		)	1,529		—			—
Securities of U.S. states and political subdivisions	(1		)	298		—			—
Federal agency mortgage-backed securities	(21		)	8,100		—			—
Collateralized loan and other debt obligations	(2		)	1,229		—			—
Total held-to-maturity securities	(33		)	11,156		—			—
Total	$	(1,424	)	80,180		(225	)		3,057
December 31, 2014
Available-for-sale securities:
Securities of U.S. Treasury and federal agencies	$	(138	)	12,857		—			—
Securities of U.S. states and political subdivisions	(459		)	13,600		(40	)		353
Mortgage-backed securities:
Federal agencies	(751		)	39,560		—			—
Residential	—			139		(24	)		951
Commercial	(24		)	3,366		(33	)		368
Total mortgage-backed securities	(775		)	43,065		(57	)		1,319
Corporate debt securities	(39		)	1,807		(131	)		1,132
Collateralized loan and other debt obligations	(172		)	16,609		(12	)		104
Other	(23		)	782		(4	)		203
Total debt securities	(1,606		)	88,720		(244	)		3,111
Perpetual preferred securities	(70		)	725		—			—
Total available-for-sale securities	(1,676		)	89,445		(244	)		3,111
Held-to-maturity securities:
Securities of U.S. Treasury and federal agencies	(8		)	1,889		—			—
Collateralized loan and other debt obligations	(13		)	1,391		—			—
Total held-to-maturity securities	(21		)	3,280		—			—
Total	$	(1,697	)	92,725		(244	)		3,111
Contractual Maturities
The following table shows the remaining contractual maturities and contractual weighted-average yields (taxable-equivalent basis) of available-for-sale debt securities. The remaining contractual principal maturities for MBS do not consider prepayments. Remaining expected maturities will differ from contractual maturities because borrowers may have the right to prepay obligations before the underlying mortgages mature.
						Remaining contractual maturity
	Total					Within one year							After one year						After five years				After ten years
													through five years						through ten years
(in millions)	amount			Yield		Amount				Yield			Amount				Yield		Amount		Yield		Amount		Yield
March 31, 2015
Available-for-sale securities (1):
Securities of U.S. Treasury and federal agencies	$	30,031		1.47	%	$	56			1.09	%		$	26,702			1.42	%	$	3,273	1.85	%	$	—	—	%
Securities of U.S. states and political subdivisions	47,380			5.72		3,820				1.71			6,469				2.26		3,179		5.21		33,912		6.87
Mortgage-backed securities:
Federal agencies	103,217			3.27		—				—			399				1.94		712		3.99		102,106		3.27
Residential	8,723			4.52		—				—			14				5.1		72		5.64		8,637		4.51
Commercial	15,989			5.23		—				—			60				2.63		—		—		15,929		5.24
Total mortgage-backed securities	127,929			3.6		—				—			473				2.12		784		4.14		126,672		3.6
Corporate debt securities	15,133			4.89		675				4.09			7,923				4.61		5,163		5.21		1,372		5.71
Collateralized loan and other debt obligations	27,722			1.91		—				—			857				0.75		10,765		1.79		16,100		2.05
Other	5,904			1.8		275				1.53			1,277				2.59		945		1.24		3,407		1.68
Total available-for-sale debt securities at fair value	$	254,099		3.59	%	$	4,826			2.03	%		$	43,701			2.15	%	$	24,109	3.04	%	$	181,463	4.05	%
December 31, 2014
Available-for-sale securities (1):													`
Securities of U.S. Treasury and federal agencies	$	25,804		1.49	%	$	181			1.47	%		$	22,348			1.44	%	$	3,275	1.83	%	$	—	—	%
Securities of U.S. states and political subdivisions	44,944			5.66		3,568				1.71			7,050				2.19		3,235		5.13		31,091		6.96
Mortgage-backed securities:
Federal agencies	110,089			3.27		—				—			276				2.86		1,011		3.38		108,802		3.27
Residential	9,269			4.5		—				—			9				4.81		83		5.63		9,177		4.49
Commercial	16,994			5.16		1				0.28			62				2.71		5		1.3		16,926		5.17
Total mortgage-backed securities	136,352			3.59		1				0.28			347				2.88		1,099		3.54		134,905		3.59
Corporate debt securities	14,786			4.9		600				4.32			7,634				4.54		5,209		5.3		1,343		5.7
Collateralized loan and other debt obligations	25,361			1.83		23				1.95			944				0.71		8,472		1.67		15,922		1.99
Other	6,519			1.79		274				1.55			1,452				2.56		1,020		1.32		3,773		1.64
Total available-for-sale debt securities at fair value	$	253,766		3.6	%	$	4,647			2.03	%		$	39,775			2.2	%	$	22,310	3.12	%	$	187,034	3.99	%
-1	Weighted-average yields displayed by maturity bucket are weighted based on fair value and predominantly represent contractual coupon rates without effect for any related hedging derivatives.
The following table shows the amortized cost and weighted-average yields of held-to-maturity debt securities by contractual maturity.
						Remaining contractual maturity
	Total					Within one year							After one year						After five years				After ten years
													through five years						through ten years
(in millions)	amount			Yield		Amount				Yield			Amount				Yield		Amount		Yield		Amount		Yield
March 31, 2015
Held-to-maturity securities (1):
Amortized cost:
Securities of U.S. Treasury and federal agencies	$	44,244		2.12	%	$	—			—	%		$	—			—	%	$	44,244	2.12	%	$	—	—	%
Securities of U.S. states and political subdivisions	2,092			5.7		—				—			—				—		65		7.7		2,027		5.64
Federal agency mortgage-backed securities	14,311			3.47		—				—			—				—		—		—		14,311		3.47
Collateralized loan and other debt obligations	1,404			1.97		—				—			—				—		—		—		1,404		1.97
Other	5,082			1.56		200				1.62			3,553				1.62		1,329		1.4		—		—
Total held-to-maturity debt securities at amortized cost	$	67,133		2.47	%	$	200			1.62	%		$	3,553			1.62	%	$	45,638	2.11	%	$	17,742	3.6	%
December 31, 2014
Held-to-maturity securities (1):
Amortized cost:
Securities of U.S. Treasury and federal agencies	$	40,886		2.12	%	$	—			—	%		$	—			—	%	$	40,886	2.12	%	$	—	—	%
Securities of U.S. states and political subdivisions	1,962			5.6		—				—			—				—		9		6.6		1,953		5.59
Federal agency mortgage-backed securities	5,476			3.89		—				—			—				—		—		—		5,476		3.89
Collateralized loan and other debt obligations	1,404			1.96		—				—			—				—		—		—		1,404		1.96
Other	5,755			1.64		192				1.61			4,214				1.72		1,349		1.41		—		—
Total held-to-maturity debt securities at amortized cost	$	55,483		2.37	%	$	192			1.61	%		$	4,214			1.72	%	$	42,244	2.1	%	$	8,833	3.96	%
-1	Weighted-average yields displayed by maturity bucket are weighted based on amortized cost and predominantly represent contractual coupon rates.
The following table shows the fair value of held-to-maturity debt securities by contractual maturity.
				Remaining contractual maturity
	Total			Within one year			After one year				After five years				After ten years
							through five years				through ten years
(in millions)	amount			Amount			Amount				Amount				Amount
March 31, 2015
Held-to-maturity securities:
Fair value:
Securities of U.S. Treasury and federal agencies	$	45,676		$	—		$	—			$	45,676			$	—
Securities of U.S. states and political subdivisions	2,121			—			—				67				2,054
Federal agency mortgage-backed securities	14,472			—			—				—				14,472
Collateralized loan and other debt obligations	1,403			—			—				—				1,403
Other	5,109			201			3,574				1,334				—
Total held-to-maturity debt securities at fair value	$	68,781		$	201		$	3,574			$	47,077			$	17,929
December 31, 2014
Held-to-maturity securities:
Fair value:
Securities of U.S. Treasury and federal agencies	$	41,548		$	—		$	—			$	41,548			$	—
Securities of U.S. states and political subdivisions	1,989			—			—				9				1,980
Federal agency mortgage-backed securities	5,641			—			—				—				5,641
Collateralized loan and other debt obligations	1,391			—			—				—				1,391
Other	5,790			193			4,239				1,358				—
Total held-to-maturity debt securities at fair value	$	56,359		$	193		$	4,239			$	42,915			$	9,012
Realized Gains and Losses
The following table shows the gross realized gains and losses on sales and OTTI write-downs related to the available-for-sale securities portfolio, which includes marketable equity securities,
as well as net realized gains and losses on nonmarketable equity investments (see Note 6 (Other Assets)).
	Quarter ended March 31,
(in millions)	2015			2014
Gross realized gains	$	348		391
Gross realized losses	(20		)	(3	)
OTTI write-downs	(31		)	(9	)
Net realized gains from available-for-sale securities	297			379
Net realized gains from nonmarketable equity investments	351			551
Net realized gains from debt securities and equity investments	$	648		930
Other-Than-Temporary Impairment
The following table shows the detail of total OTTI write-downs included in earnings for available-for-sale debt securities, marketable equity securities and nonmarketable equity investments. There were no OTTI write-downs on held-to-maturity securities during first quarter 2015 and 2014.
	Quarter ended March 31,
(in millions)	2015			2014
OTTI write-downs included in earnings
Debt securities:
Securities of U.S. states and political subdivisions	$	16		—
Mortgage-backed securities:
Residential	15			5
Commercial	—			2
Total debt securities	31			7
Equity securities:
Marketable equity securities:
Other marketable equity securities	—			2
Total marketable equity securities	—			2
Total investment securities	31			9
Nonmarketable equity investments	42			126
Total OTTI write-downs included in earnings	$	73		135
Other-Than-Temporarily Impaired Debt Securities
The following table shows the detail of OTTI write-downs on available-for-sale debt securities included in earnings and the related changes in OCI for the same securities.
	Quarter ended March 31,
(in millions)	2015			2014
OTTI on debt securities
Recorded as part of gross realized losses:
Credit-related OTTI	$	20		7
Intent-to-sell OTTI	11			—
Total recorded as part of gross realized losses	31			7
Changes to OCI for losses (reversal of losses) in non-credit-related OTTI (1):
Securities of U.S. states and political subdivisions	(1		)	—
Residential mortgage-backed securities	(21		)	(9	)
Commercial mortgage-backed securities	(15		)	(12	)
Total changes to OCI for non-credit-related OTTI	(37		)	(21	)
Total OTTI losses (reversal of losses) recorded on debt securities	$	(6	)	(14	)
-1	Represents amounts recorded to OCI for impairment, due to factors other than credit, on debt securities that have also had credit-related OTTI write-downs during the period. Increases represent initial or subsequent non-credit-related OTTI on debt securities. Decreases represent partial to full reversal of impairment due to recoveries in the fair value of securities due to non-credit factors.
The following table presents a rollforward of the OTTI credit loss that has been recognized in earnings as a write-down of available-for-sale debt securities we still own (referred to as "credit-impaired" debt securities) and do not intend to sell. Recognized credit loss represents the difference between the present value of expected future cash flows discounted using the security’s current effective interest rate and the amortized cost basis of the security prior to considering credit loss.
	Quarter ended March 31,
(in millions)	2015			2014
Credit loss recognized, beginning of year	$	1,025		1,171
Additions:
For securities with previous credit impairments	20			7
Total additions	20			7
Reductions:
For securities sold, matured, or intended/required to be sold	(14		)	(29	)
For recoveries of previous credit impairments (1)	(2		)	(6	)
Total reductions	(16		)	(35	)
Credit loss recognized, end of year	$	1,029		1,143
-1	Recoveries of previous credit impairments result from increases in expected cash flows subsequent to credit loss recognition. Such recoveries are reflected prospectively as interest yield adjustments using the effective interest method.

Loans_and_Allowance_for_Credit

Loans and Allowance for Credit Losses	3 Months Ended
	Mar. 31, 2015
Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract]
Loans and Allowance for Credit Losses
	Note 5:  Loans and Allowance for Credit Losses
	The following table presents total loans outstanding by portfolio segment and class of financing receivable. Outstanding balances include a total net reduction of $4.2 billion and $4.5 billion at March 31, 2015, and December 31, 2014, respectively, for unearned income, net deferred loan fees, and unamortized discounts and premiums.
	(in millions)	Mar 31,				Dec 31,
		2015				2014
	Commercial:
	Commercial and industrial	$	271,088			271,795
	Real estate mortgage	111,848				111,996
	Real estate construction	19,981				18,728
	Lease financing	12,382				12,307
	Total commercial	415,299				414,826
	Consumer:
	Real estate 1-4 family first mortgage	265,213				265,386
	Real estate 1-4 family junior lien mortgage	57,839				59,717
	Credit card	30,078				31,119
	Automobile	56,339				55,740
	Other revolving credit and installment	36,463				35,763
	Total consumer	445,932				447,725
	Total loans	$	861,231			862,551
	Our foreign loans are reported by respective class of financing receivable in the table above. Substantially all of our foreign loan portfolio is commercial loans. Loans are classified as foreign primarily based on whether the borrower’s primary address is outside of the United States. The following table presents total commercial foreign loans outstanding by class of financing receivable.
	(in millions)	Mar 31,				Dec 31,
		2015				2014
	Commercial foreign loans:
	Commercial and industrial	$	45,325			44,707
	Real estate mortgage	5,171				4,776
	Real estate construction	241				218
	Lease financing	307				336
	Total commercial foreign loans	$	51,044			50,037
	Loan Purchases, Sales, and Transfers
	The following table summarizes the proceeds paid or received for purchases and sales of loans and transfers from loans held for investment to mortgages/loans held for sale at lower of cost or fair value. This loan activity primarily includes loans purchased and sales of whole loan or participating interests, whereby we receive or transfer a portion of a loan after origination. The table excludes PCI loans and loans recorded at fair value, including loans originated for sale because their loan activity normally does not impact the allowance for credit losses.
										Quarter ended March 31,
		2015								2014
	(in millions)	Commercial				Consumer		Total		Commercial		Consumer		Total
	Purchases (1)	$	1,091			—		1,091		1,014		168		1,182
	Sales	(206		)		(29	)	(235	)	(1,641	)	(50	)	(1,691	)
	Transfers to MHFS/LHFS (1)	(7		)		(2	)	(9	)	(35	)	(5	)	(40	)
	-1	The “Purchases” and “Transfers to MHFS/LHFS" categories exclude activity in government insured/guaranteed real estate 1-4 family first mortgage loans. As servicer, we are able to buy delinquent insured/guaranteed loans out of the Government National Mortgage Association (GNMA) pools. These loans are predominantly insured by the Federal Housing Administration (FHA) or guaranteed by the Department of Veterans Affairs (VA). Accordingly, these loans have limited impact on the allowance for loan losses. On a net basis, such purchases net of transfers to MHFS were $1.1 billion and $1.5 billion for first quarter 2015 and 2014, respectively.
	Commitments to Lend
	A commitment to lend is a legally binding agreement to lend funds to a customer, usually at a stated interest rate, if funded, and for specific purposes and time periods. We generally require a fee to extend such commitments. Certain commitments are subject to loan agreements with covenants regarding the financial performance of the customer or borrowing base formulas on an ongoing basis that must be met before we are required to fund the commitment. We may reduce or cancel consumer commitments, including home equity lines and credit card lines, in accordance with the contracts and applicable law.
	We may, as a representative for other lenders, advance funds or provide for the issuance of letters of credit under syndicated loan or letter of credit agreements. Any advances are generally repaid in less than a week and would normally require default of both the customer and another lender to expose us to loss. These temporary advance arrangements totaled approximately $89 billion at March 31, 2015 and $87 billion at December 31, 2014.
	We issue commercial letters of credit to assist customers in purchasing goods or services, typically for international trade. At March 31, 2015, and December 31, 2014, we had $1.0 billion and $1.2 billion, respectively, of outstanding issued commercial letters of credit. We also originate multipurpose lending commitments under which borrowers have the option to draw on the facility for different purposes in one of several forms, including a standby letter of credit. See Note 10 (Guarantees, Pledged Assets and Collateral) for additional information on standby letters of credit.
	When we make commitments, we are exposed to credit risk. The maximum credit risk for these commitments will generally be lower than the contractual amount because a significant portion of these commitments are expected to expire without being used by the customer. In addition, we manage the potential risk in commitments to lend by limiting the total amount of commitments, both by individual customer and in total, by monitoring the size and maturity structure of these commitments and by applying the same credit standards for these commitments as for all of our credit activities.
	For loans and commitments to lend, we generally require collateral or a guarantee. We may require various types of collateral, including commercial and consumer real estate, autos, other short-term liquid assets such as accounts receivable or inventory and long-lived assets, such as equipment and other business assets. Collateral requirements for each loan or commitment may vary based on the loan product and our assessment of a customer’s credit risk according to the specific credit underwriting, including credit terms and structure.
	The contractual amount of our unfunded credit commitments, including unissued standby and commercial letters of credit, is summarized by portfolio segment and class of financing receivable in the following table. The table excludes the standby and commercial letters of credit and temporary advance arrangements described above.
	(in millions)	Mar 31,				Dec 31,
		2015				2014
	Commercial:
	Commercial and industrial	$	280,803			278,093
	Real estate mortgage	6,359				6,134
	Real estate construction	15,692				15,587
	Lease financing	3				3
	Total commercial	302,857				299,817
	Consumer:
	Real estate 1-4 family first mortgage	37,487				32,055
	Real estate 1-4 family	45,196				45,492
	junior lien mortgage
	Credit card	96,437				95,062
	Other revolving credit and installment	25,635				24,816
	Total consumer	204,755				197,425
	Total unfunded	$	507,612			497,242
	credit commitments
	Allowance for Credit Losses
	The allowance for credit losses consists of the allowance for loan losses and the allowance for unfunded credit commitments. Changes in the allowance for credit losses were:
		Three months ended March 31,
(in millions)	2015			2014
Balance, beginning of period	13,169			14,971
Provision for credit losses	608			325
Interest income on certain impaired loans (1)	(52	)		(56	)
Loan charge-offs:
Commercial:
Commercial and industrial	(133	)		(163	)
Real estate mortgage	(23	)		(20	)
Real estate construction	(1	)		(1	)
Lease financing	(3	)		(4	)
Total commercial	(160	)		(188	)
Consumer:
Real estate 1-4 family first mortgage	(130	)		(223	)
Real estate 1-4 family junior lien mortgage	(179	)		(249	)
Credit card	(278	)		(267	)
Automobile	(195	)		(180	)
Other revolving credit and installment	(154	)		(177	)
Total consumer	(936	)		(1,096	)
Total loan charge-offs	(1,096	)		(1,284	)
Loan recoveries:
Commercial:
Commercial and industrial	69			114
Real estate mortgage	34			42
Real estate construction	10			24
Lease financing	3			3
Total commercial	116			183
Consumer:
Real estate 1-4 family first mortgage	47			53
Real estate 1-4 family junior lien mortgage	56			57
Credit card	39			36
Automobile	94			90
Other revolving credit and installment	36			40
Total consumer	272			276
Total loan recoveries	388			459
Net loan charge-offs (2)	(708	)		(825	)
Allowances related to business combinations/other	(4	)		(1	)
Balance, end of period	13,013			14,414
Components:
Allowance for loan losses	12,176			13,695
Allowance for unfunded credit commitments	837			719
Allowance for credit losses (3)	13,013			14,414
Net loan charge-offs (annualized) as a percentage of average total loans (2)	0.33			0.41
Allowance for loan losses as a percentage of total loans (3)	1.41			1.66
Allowance for credit losses as a percentage of total loans (3)	1.51			1.74
-1	Certain impaired loans with an allowance calculated by discounting expected cash flows using the loan’s effective interest rate over the remaining life of the loan recognize reductions in the allowance as interest income.
-2	For PCI loans, charge-offs are only recorded to the extent that losses exceed the purchase accounting estimates.
-3	The allowance for credit losses includes $9 million and $21 million at March 31, 2015 and 2014, respectively, related to PCI loans acquired from Wachovia. Loans acquired from Wachovia are included in total loans net of related purchase accounting net write-downs.
The following table summarizes the activity in the allowance for credit losses by our commercial and consumer portfolio segments.
							2015						2014
(in millions)	Commercial				Consumer		Total		Commercial		Consumer		Total
Quarter ended March 31,
Balance, beginning of period	$	6,377			6,792		13,169		6,103		8,868		14,971
Provision for credit losses	9				599		608		263		62		325
Interest income on certain impaired loans	(5		)		(47	)	(52	)	(6	)	(50	)	(56	)
Loan charge-offs	(160		)		(936	)	(1,096	)	(188	)	(1,096	)	(1,284	)
Loan recoveries	116				272		388		183		276		459
Net loan charge-offs	(44		)		(664	)	(708	)	(5	)	(820	)	(825	)
Allowance related to business combinations/other	(4		)		—		(4	)	(1	)	—		(1	)
Balance, end of period	$	6,333			6,680		13,013		6,354		8,060		14,414
The following table disaggregates our allowance for credit losses and recorded investment in loans by impairment methodology.
	Allowance for credit losses								Recorded investment in loans
(in millions)	Commercial				Consumer		Total		Commercial		Consumer		Total
March 31, 2015
Collectively evaluated (1)	$	5,550			3,705		9,255		410,519		403,241		813,760
Individually evaluated (2)	774				2,975		3,749		3,702		21,380		25,082
PCI (3)	9				—		9		1,078		21,311		22,389
Total	$	6,333			6,680		13,013		415,299		445,932		861,231
December 31, 2014
Collectively evaluated (1)	$	5,482			3,706		9,188		409,560		404,263		813,823
Individually evaluated (2)	884				3,086		3,970		3,759		21,649		25,408
PCI (3)	11				—		11		1,507		21,813		23,320
Total	$	6,377			6,792		13,169		414,826		447,725		862,551
-1	Represents loans collectively evaluated for impairment in accordance with Accounting Standards Codification (ASC) 450-20,Loss Contingencies(formerly FAS 5), and pursuant to amendments by ASU 2010-20 regarding allowance for non-impaired loans.
-2	Represents loans individually evaluated for impairment in accordance with ASC 310-10, Receivables (formerly FAS 114), and pursuant to amendments by ASU 2010-20 regarding allowance for impaired loans.
-3	Represents the allowance and related loan carrying value determined in accordance with ASC 310-30, Receivables – Loans and Debt Securities Acquired with Deteriorated Credit Quality (formerly SOP 03-3) and pursuant to amendments by ASU 2010-20 regarding allowance for PCI loans.
Credit Quality
We monitor credit quality by evaluating various attributes and utilize such information in our evaluation of the appropriateness of the allowance for credit losses. The following sections provide the credit quality indicators we most closely monitor. The credit quality indicators are generally based on information as of our financial statement date, with the exception of updated Fair Isaac Corporation (FICO) scores and updated loan-to-value (LTV)/combined LTV (CLTV), which are obtained at least quarterly. Generally, these indicators are updated in the second month of each quarter, with updates no older than December 31, 2014. See the “Purchased Credit-Impaired Loans” section of this Note for credit quality information on our PCI portfolio.
COMMERCIAL CREDIT QUALITY INDICATORS  In addition to monitoring commercial loan concentration risk, we manage a consistent process for assessing commercial loan credit quality. Generally, commercial loans are subject to individual risk assessment using our internal borrower and collateral quality ratings. Our ratings are aligned to Pass and Criticized categories. The Criticized category includes Special Mention, Substandard, and Doubtful categories which are defined by bank regulatory agencies.
The following table provides a breakdown of outstanding commercial loans by risk category. Of the $7.5 billion in criticized commercial real estate (CRE) loans at March 31, 2015, $1.5 billion has been placed on nonaccrual status and written down to net realizable collateral value. CRE loans have a high level of monitoring in place to manage these assets and mitigate loss exposure.
(in millions)	Commercial				Real		Real		Lease		Total
	and				estate		estate		financing
	industrial				mortgage		construction
March 31, 2015
By risk category:
Pass	$	254,884			104,252		19,025		11,956		390,117
Criticized	16,135				6,710		833		426		24,104
Total commercial loans (excluding PCI)	271,019				110,962		19,858		12,382		414,221
Total commercial PCI loans (carrying value)	69				886		123		—		1,078
Total commercial loans	$	271,088			111,848		19,981		12,382		415,299
December 31, 2014
By risk category:
Pass	$	255,611			103,319		17,661		11,723		388,314
Criticized	16,109				7,416		896		584		25,005
Total commercial loans (excluding PCI)	271,720				110,735		18,557		12,307		413,319
Total commercial PCI loans (carrying value)	75				1,261		171		—		1,507
Total commercial loans	$	271,795			111,996		18,728		12,307		414,826
The following table provides past due information for commercial loans, which we monitor as part of our credit risk management practices.
(in millions)	Commercial				Real		Real		Lease		Total
	and				estate		estate		financing
	industrial				mortgage		construction
March 31, 2015
By delinquency status:
Current-29 DPD and still accruing	$	269,892			109,300		19,666		12,334		411,192
30-89 DPD and still accruing	433				295		10		25		763
90+ DPD and still accruing	31				43		—		—		74
Nonaccrual loans	663				1,324		182		23		2,192
Total commercial loans (excluding PCI)	271,019				110,962		19,858		12,382		414,221
Total commercial PCI loans (carrying value)	69				886		123		—		1,078
Total commercial loans	$	271,088			111,848		19,981		12,382		415,299
December 31, 2014
By delinquency status:
Current-29 DPD and still accruing	$	270,624			109,032		18,345		12,251		410,252
30-89 DPD and still accruing	527				197		25		32		781
90+ DPD and still accruing	31				16		—		—		47
Nonaccrual loans	538				1,490		187		24		2,239
Total commercial loans (excluding PCI)	271,720				110,735		18,557		12,307		413,319
Total commercial PCI loans (carrying value)	75				1,261		171		—		1,507
Total commercial loans	$	271,795			111,996		18,728		12,307		414,826
CONSUMER CREDIT QUALITY INDICATORS  We have various classes of consumer loans that present unique risks. Loan delinquency, FICO credit scores and LTV for loan types are common credit quality indicators that we monitor and utilize in our evaluation of the appropriateness of the allowance for credit losses for the consumer portfolio segment.
Many of our loss estimation techniques used for the allowance for credit losses rely on delinquency-based models; therefore, delinquency is an important indicator of credit quality and the establishment of our allowance for credit losses. The following table provides the outstanding balances of our consumer portfolio by delinquency status.
(in millions)	Real estate				Real estate		Credit		Automobile		Other		Total
	1-4 family				1-4 family		card				revolving
	first				junior lien						credit and
	mortgage				mortgage						installment
March 31, 2015
By delinquency status:
Current-29 DPD	$	210,505			56,460		29,401		55,340		36,085		387,791
30-59 DPD	2,065				337		188		792		169		3,551
60-89 DPD	852				198		137		150		95		1,432
90-119 DPD	417				116		124		51		81		789
120-179 DPD	511				170		227		5		18		931
180+ DPD	4,122				470		1		1		15		4,609
Government insured/guaranteed loans (1)	25,518				—		—		—		—		25,518
Total consumer loans (excluding PCI)	243,990				57,751		30,078		56,339		36,463		424,621
Total consumer PCI loans (carrying value)	21,223				88		—		—		—		21,311
Total consumer loans	$	265,213			57,839		30,078		56,339		36,463		445,932
December 31, 2014
By delinquency status:
Current-29 DPD	$	208,642			58,182		30,356		54,365		35,356		386,901
30-59 DPD	2,415				398		239		1,056		180		4,288
60-89 DPD	993				220		160		235		111		1,719
90-119 DPD	488				158		136		78		82		942
120-179 DPD	610				194		227		5		21		1,057
180+ DPD	4,258				464		1		1		13		4,737
Government insured/guaranteed loans (1)	26,268				—		—		—		—		26,268
Total consumer loans (excluding PCI)	243,674				59,616		31,119		55,740		35,763		425,912
Total consumer PCI loans (carrying value)	21,712				101		—		—		—		21,813
Total consumer loans	$	265,386			59,717		31,119		55,740		35,763		447,725
-1	Represents loans whose repayments are predominantly insured by the FHA or guaranteed by the VA and student loans whose repayments are predominantly guaranteed by agencies on behalf of the U.S. Department of Education under the Federal Family Education Loan Program (FFELP). Loans insured/guaranteed by the FHA/VA and 90+ DPD totaled $15.0 billion at March 31, 2015, compared with $16.2 billion at December 31, 2014.
Of the $6.3 billion of consumer loans not government insured/guaranteed that are 90 days or more past due at March 31, 2015, $767 million was accruing, compared with $6.7 billion past due and $873 million accruing at December 31, 2014.
Real estate 1-4 family first mortgage loans 180 days or more past due totaled $4.1 billion, or 1.7% of total first mortgages (excluding PCI), at March 31, 2015, compared with $4.3 billion, or 1.7%, at December 31, 2014.
The following table provides a breakdown of our consumer portfolio by updated FICO. We obtain FICO scores at loan origination and the scores are updated at least quarterly. The majority of our portfolio is underwritten with a FICO score of 680 and above. FICO is not available for certain loan types and may not be obtained if we deem it unnecessary due to strong collateral and other borrower attributes, primarily security-based loans of $6.1 billion at March 31, 2015, and $5.9 billion at December 31, 2014.
(in millions)	Real estate				Real estate		Credit		Automobile		Other		Total
	1-4 family				1-4 family		card				revolving
	first				junior lien						credit and
	mortgage				mortgage						installment
March 31, 2015
By updated FICO:
< 600	$	10,734			3,902		2,744		8,814		929		27,123
600-639	7,790				2,732		2,582		6,256		1,048		20,408
640-679	13,725				5,169		4,800		9,477		2,372		35,543
680-719	24,563				8,673		6,087		10,181		4,344		53,848
720-759	35,288				11,884		6,203		7,606		5,840		66,821
760-799	82,421				17,151		4,938		7,254		7,810		119,574
800+	41,069				7,352		2,498		6,226		6,008		63,153
No FICO available	2,882				888		226		525		2,045		6,566
FICO not required	—				—		—		—		6,067		6,067
Government insured/guaranteed loans (1)	25,518				—		—		—		—		25,518
Total consumer loans (excluding PCI)	243,990				57,751		30,078		56,339		36,463		424,621
Total consumer PCI loans (carrying value)	21,223				88		—		—		—		21,311
Total consumer loans	$	265,213			57,839		30,078		56,339		36,463		445,932
December 31, 2014
By updated FICO:
< 600	$	11,166			4,001		2,639		8,825		894		27,525
600-639	7,866				2,794		2,588		6,236		1,058		20,542
640-679	13,894				5,324		4,931		9,352		2,366		35,867
680-719	24,412				8,970		6,285		9,994		4,389		54,050
720-759	35,490				12,171		6,407		7,475		5,896		67,439
760-799	82,123				17,897		5,234		7,315		7,673		120,242
800+	39,219				7,581		2,758		6,184		5,819		61,561
No FICO available	3,236				878		277		359		1,814		6,564
FICO not required	—				—		—		—		5,854		5,854
Government insured/guaranteed loans (1)	26,268				—		—		—		—		26,268
Total consumer loans (excluding PCI)	243,674				59,616		31,119		55,740		35,763		425,912
Total consumer PCI loans (carrying value)	21,712				101		—		—		—		21,813
Total consumer loans	$	265,386			59,717		31,119		55,740		35,763		447,725
-1	Represents loans whose repayments are predominantly insured by the FHA or guaranteed by the VA and student loans whose repayments are predominantly guaranteed by agencies on behalf of the U.S. Department of Education under FFELP.
LTV refers to the ratio comparing the loan’s unpaid principal balance to the property’s collateral value. CLTV refers to the combination of first mortgage and junior lien mortgage (including unused line amounts for credit line products) ratios. LTVs and CLTVs are updated quarterly using a cascade approach which first uses values provided by automated valuation models (AVMs) for the property. If an AVM is not available, then the value is estimated using the original appraised value adjusted by the change in Home Price Index (HPI) for the property location. If an HPI is not available, the original appraised value is used. The HPI value is normally the only method considered for high value properties, generally with an original value of $1 million or more, as the AVM values have proven less accurate for these properties.
The following table shows the most updated LTV and CLTV distribution of the real estate 1-4 family first and junior lien mortgage loan portfolios. We consider the trends in residential real estate markets as we monitor credit risk and establish our allowance for credit losses. In the event of a default, any loss should be limited to the portion of the loan amount in excess of the net realizable value of the underlying real estate collateral value. Certain loans do not have an LTV or CLTV primarily due to industry data availability and portfolios acquired from or serviced by other institutions.
	March 31, 2015								December 31, 2014
(in millions)	Real estate				Real estate		Total		Real estate		Real estate		Total
	1-4 family				1-4 family				1-4 family		1-4 family
	first				junior lien				first		junior lien
	mortgage				mortgage				mortgage		mortgage
	by LTV				by CLTV				by LTV		by CLTV
By LTV/CLTV:
0-60%	$	95,988			14,717		110,705		95,719		15,603		111,322
60.01-80%	87,147				17,427		104,574		86,112		17,651		103,763
80.01-100%	25,544				13,833		39,377		25,170		14,004		39,174
100.01-120% (1)	5,908				7,023		12,931		6,133		7,254		13,387
> 120% (1)	2,682				3,784		6,466		2,856		4,058		6,914
No LTV/CLTV available	1,203				967		2,170		1,416		1,046		2,462
Government insured/guaranteed loans (2)	25,518				—		25,518		26,268		—		26,268
Total consumer loans (excluding PCI)	243,990				57,751		301,741		243,674		59,616		303,290
Total consumer PCI loans (carrying value)	21,223				88		21,311		21,712		101		21,813
Total consumer loans	$	265,213			57,839		323,052		265,386		59,717		325,103
-1	Reflects total loan balances with LTV/CLTV amounts in excess of 100%. In the event of default, the loss content would generally be limited to only the amount in excess of 100% LTV/CLTV.
-2	Represents loans whose repayments are predominantly insured by the FHA or guaranteed by the VA.
NONACCRUAL LOANS  The following table provides loans on nonaccrual status. PCI loans are excluded from this table because they continue to earn interest from accretable yield, independent of performance in accordance with their contractual terms.
(in millions)	Mar 31,				Dec 31,
	2015				2014
Commercial:
Commercial and industrial	$	663			538
Real estate mortgage	1,324				1,490
Real estate construction	182				187
Lease financing	23				24
Total commercial (1)	2,192				2,239
Consumer:
Real estate 1-4 family first mortgage (2)	8,345				8,583
Real estate 1-4 family junior lien mortgage	1,798				1,848
Automobile	133				137
Other revolving credit and installment	42				41
Total consumer	10,318				10,609
Total nonaccrual loans	$	12,510			12,848
(excluding PCI)
-1	Includes LHFS of $1 million at both March 31, 2015 and December 31, 2014.
-2	Includes MHFS of $144 million and $177 million at March 31, 2015, and December 31, 2014, respectively.
LOANS IN PROCESS OF FORECLOSURE  Our recorded investment in consumer mortgage loans collateralized by residential real estate property that are in process of foreclosure was $12.4 billion and $12.7 billion at March 31, 2015 and December 31, 2014, respectively, which included $6.5 billion and $6.6 billion, respectively, of loans that are government insured/guaranteed. We commence the foreclosure process on consumer real estate loans when a borrower becomes 120 days delinquent in accordance with Consumer Finance Protection Bureau Guidelines. Foreclosure procedures and timelines vary depending on whether the property address resides in a judicial or non-judicial state. Judicial states require the foreclosure to be processed through the state’s courts while non-judicial states are processed without court intervention. Foreclosure timelines vary according to state law.
LOANS 90 DAYS OR MORE PAST DUE AND STILL ACCRUING  Certain loans 90 days or more past due as to interest or principal are still accruing, because they are (1) well-secured and in the process of collection or (2) real estate 1‑4 family mortgage loans or consumer loans exempt under regulatory rules from being classified as nonaccrual until later delinquency, usually 120 days past due. PCI loans of $3.6 billion at March 31, 2015, and $3.7 billion at December 31, 2014, are not included in these past due and still accruing loans even though they are 90 days or more contractually past due. These PCI loans are considered to be accruing because they continue to earn interest from accretable yield, independent of performance in accordance with their contractual terms.
The following table shows non-PCI loans 90 days or more past due and still accruing by class for loans not government insured/guaranteed.
(in millions)	Mar 31, 2015				Dec 31, 2014
Loans 90 days or more past due and still accruing:
Total (excluding PCI):	$	16,344			17,810
Less: FHA insured/guaranteed by the VA (1)(2)	15,453				16,827
Less: Student loans guaranteed under the FFELP (3)	50				63
Total, not government insured/guaranteed	$	841			920
By segment and class, not government insured/guaranteed:
Commercial:
Commercial and industrial	$	31			31
Real estate mortgage	43				16
Real estate construction	—				—
Total commercial	74				47
Consumer:
Real estate 1-4 family first mortgage (2)	221				260
Real estate 1-4 family junior lien mortgage (2)	55				83
Credit card	352				364
Automobile	47				73
Other revolving credit and installment	92				93
Total consumer	767				873
Total, not government insured/guaranteed	$	841			920
-1	Represents loans whose repayments are predominantly insured by the FHA or guaranteed by the VA.
-2	Includes mortgage loans held for sale 90 days or more past due and still accruing.
-3	Represents loans whose repayments are predominantly guaranteed by agencies on behalf of the U.S. Department of Education under the FFELP.
IMPAIRED LOANS The table below summarizes key information for impaired loans. Our impaired loans predominantly include loans on nonaccrual status in the commercial portfolio segment and loans modified in a TDR, whether on accrual or nonaccrual status. These impaired loans generally have estimated losses which are included in the allowance for credit losses. We have impaired loans with no allowance for credit losses when loss content has been previously recognized through charge-offs and we do not anticipate additional charge-offs or losses, or certain loans are currently performing in accordance with their terms and for which no loss has been estimated. Impaired loans exclude PCI loans. The table below includes trial modifications that totaled$432 million at March 31, 2015, and $452 million at December 31, 2014.
For additional information on our impaired loans and allowance for credit losses, see Note 1 (Summary of Significant Accounting Policies) in our 2014 Form 10-K.
					Recorded investment
(in millions)	Unpaid				Impaired		Impaired loans		Related
	principal				loans		with related		allowance for
	balance (1)						allowance for		credit losses
							credit losses
March 31, 2015
Commercial:
Commercial and industrial	$	1,727			1,071		899		234
Real estate mortgage	3,008				2,349		2,279		486
Real estate construction	433				258		238		47
Lease financing	33				24		24		7
Total commercial	5,201				3,702		3,440		774
Consumer:
Real estate 1-4 family first mortgage	21,007				18,347		12,119		2,218
Real estate 1-4 family junior lien mortgage	2,835				2,529		1,980		648
Credit card	326				326		326		95
Automobile	188				123		48		7
Other revolving credit and installment	62				55		46		7
Total consumer (2)	24,418				21,380		14,519		2,975
Total impaired loans (excluding PCI)	$	29,619			25,082		17,959		3,749
December 31, 2014
Commercial:
Commercial and industrial	$	1,524			926		757		240
Real estate mortgage	3,190				2,483		2,405		591
Real estate construction	491				331		308		45
Lease financing	33				19		19		8
Total commercial	5,238				3,759		3,489		884
Consumer:
Real estate 1-4 family first mortgage	21,324				18,600		12,433		2,322
Real estate 1-4 family junior lien mortgage	3,094				2,534		2,009		653
Credit card	338				338		338		98
Automobile	190				127		55		8
Other revolving credit and installment	60				50		42		5
Total consumer (2)	25,006				21,649		14,877		3,086
Total impaired loans (excluding PCI)	$	30,244			25,408		18,366		3,970
-1	Excludes the unpaid principal balance for loans that have been fully charged off or otherwise have zero recorded investment.
-2	Periods ended March 31, 2015 and December 31, 2014 each include the recorded investment of $2.1 billion of government insured/guaranteed loans that are predominantly insured by the FHA or guaranteed by the VA and generally do not have an allowance.
Commitments to lend additional funds on loans whose terms have been modified in a TDR amounted to $310 million and $341 million at March 31, 2015 and December 31, 2014, respectively.
The following tables provide the average recorded investment in impaired loans and the amount of interest income recognized on impaired loans by portfolio segment and class.
	Quarter ended March 31,
	2015							2014
(in millions)	Average				Recognized			Average		Recognized
	recorded				interest			recorded		interest
	investment				income			investment		income
Commercial:
Commercial and industrial	$	1,000			20			1,282		21
Real estate mortgage	2,421				43			3,237		29
Real estate construction	291				4			575		7
Lease financing	21				—			33		—
Total commercial	3,733				67			5,127		57
Consumer:
Real estate 1-4 family first mortgage	18,486				231			19,479		237
Real estate 1-4 family junior lien mortgage	2,522				35			2,557		35
Credit card	332				10			415		12
Automobile	126				4			179		7
Other revolving credit and installment	45				1			35		1
Total consumer	21,511				281			22,665		292
Total impaired loans (excluding PCI)	$	25,244			348			27,792		349
Interest income:
Cash basis of accounting					$	108				99
Other (1)					240					250
Total interest income					$	348				349
-1	Includes interest recognized on accruing TDRs, interest recognized related to certain impaired loans which have an allowance calculated using discounting, and amortization of purchase accounting adjustments related to certain impaired loans.
TROUBLED DEBT RESTRUCTURINGS (TDRs)  When, for economic or legal reasons related to a borrower’s financial difficulties, we grant a concession for other than an insignificant period of time to a borrower that we would not otherwise consider, the related loan is classified as a TDR. We do not consider any loans modified through a loan resolution such as foreclosure or short sale to be a TDR.
We may require some consumer borrowers experiencing financial difficulty to make trial payments generally for a period of three to four months, according to the terms of a planned permanent modification, to determine if they can perform according to those terms. These arrangements represent trial modifications, which we classify and account for as TDRs. While loans are in trial payment programs, their original terms are not considered modified and they continue to advance through delinquency status and accrue interest according to their original terms. The planned modifications for these arrangements predominantly involve interest rate reductions or other interest rate concessions; however, the exact concession type and resulting financial effect are usually not finalized and do not take effect until the loan is permanently modified. The trial period terms are developed in accordance with our proprietary programs or the U.S. Treasury’s Making Home Affordable programs for real estate 1-4 family first lien (i.e. Home Affordable Modification Program – HAMP) and junior lien (i.e. Second Lien Modification Program – 2MP) mortgage loans.
At March 31, 2015, the loans in trial modification period were $139 million under HAMP, $36 million under 2MP and $257 million under proprietary programs, compared with $149 million, $34 million and $269 million at December 31, 2014, respectively. Trial modifications with a recorded investment of $155 million at March 31, 2015, and $167 million at December 31, 2014, were accruing loans and $277 million and $285 million, respectively, were nonaccruing loans. Our experience is that substantially all of the mortgages that enter a trial payment period program are successful in completing the program requirements and are then permanently modified at the end of the trial period. Our allowance process considers the impact of those modifications that are probable to occur.
The following table summarizes our TDR modifications for the periods presented by primary modification type and includes the financial effects of these modifications. For those loans that modify more than once, the table reflects each modification that occurred during the period. Loans that both modify and resolve within the period, as well as changes in recorded investment during the period for loans modified in prior periods, are not included in the table.
	Primary modification type (1)										Financial effects of modifications
(in millions)	Principal (2)				Interest		Other		Total		Charge-		Weighted		Recorded
					rate		concessions (3)				offs (4)		average		investment
					reduction								interest		related to
													rate		interest rate
													reduction		reduction (5)
Quarter ended March 31, 2015
Commercial:
Commercial and industrial	$	—			10		224		234		2		0.76	%	$	10
Real estate mortgage	—				21		309		330		1		1.35		21
Real estate construction	11				1		44		56		—		0.17		1
Total commercial	11				32		577		620		3		1.14		32
Consumer:
Real estate 1-4 family first mortgage	104				83		516		703		15		2.46		165
Real estate 1-4 family junior lien mortgage	7				20		51		78		12		3.18		27
Credit card	—				45		—		45		—		11.29		44
Automobile	1				1		27		29		10		9.06		1
Other revolving credit and installment	—				5		2		7		—		5.82		5
Trial modifications (6)	—				—		(2	)	(2	)	—		—		—
Total consumer	112				154		594		860		37		4.27		242
Total	$	123			186		1,171		1,480		40		3.9	%	$	274
Quarter ended March 31, 2014
Commercial:
Commercial and industrial	$	—			13		265		278		11		3.06	%	$	13
Real estate mortgage	3				39		294		336		—		1.29		39
Real estate construction	—				1		143		144		—		1.49		1
Total commercial	3				53		702		758		11		1.71		53
Consumer:
Real estate 1-4 family first mortgage	173				108		757		1,038		32		2.73		246
Real estate 1-4 family junior lien mortgage	18				34		63		115		18		3.24		50
Credit card	—				36		—		36		—		10.12		36
Automobile	1				1		23		25		10		9.58		1
Other revolving credit and installment	—				1		1		2		—		4.9		1
Trial modifications (6)	—				—		(29	)	(29	)	—		—		—
Total consumer	192				180		815		1,187		60		3.63		334
Total	$	195			233		1,517		1,945		71		3.37	%	$	387
-1	Amounts represent the recorded investment in loans after recognizing the effects of the TDR, if any. TDRs may have multiple types of concessions, but are presented only once in the first modification type based on the order presented in the table above. The reported amounts include loans remodified of $522 million and $612 million, for quarters ended March 31, 2015 and 2014.
-2	Principal modifications include principal forgiveness at the time of the modification, contingent principal forgiveness granted over the life of the loan based on borrower performance, and principal that has been legally separated and deferred to the end of the loan, with a zero percent contractual interest rate.
-3	Other concessions include loan renewals, term extensions and other interest and noninterest adjustments, but exclude modifications that also forgive principal and/or reduce the contractual interest rate.
-4	Charge-offs include write-downs of the investment in the loan in the period it is contractually modified. The amount of charge-off will differ from the modification terms if the loan has been charged down prior to the modification based on our policies. In addition, there may be cases where we have a charge-off/down with no legal principal modification. Modifications resulted in legally forgiving principal (actual, contingent or deferred) of $26 million and $48 million for the quarters ended March 31, 2015 and 2014, respectively.
-5	Reflects the effect of reduced interest rates on loans with principal or interest rate reduction primary modification type.
-6	Trial modifications are granted a delay in payments due under the original terms during the trial payment period. However, these loans continue to advance through delinquency status and accrue interest according to their original terms. Any subsequent permanent modification generally includes interest rate related concessions; however, the exact concession type and resulting financial effect are usually not known until the loan is permanently modified. Trial modifications for the period are presented net of previously reported trial modifications that became permanent in the current period.
The table below summarizes permanent modification TDRs that have defaulted in the current period within 12 months of their permanent modification date. We are reporting these defaulted TDRs based on a payment default definition of 90 days past due for the commercial portfolio segment and 60 days past due for the consumer portfolio segment.
	Recorded investment of defaults
	Quarter ended March 31,
(in millions)	2015				2014
Commercial:
Commercial and industrial	$	8			14
Real estate mortgage	23				42
Real estate construction	1				3
Total commercial	32				59
Consumer:
Real estate 1-4 family first mortgage	52				79
Real estate 1-4 family junior lien mortgage	4				7
Credit card	13				13
Automobile	3				4
Other revolving credit and installment	1				—
Total consumer	73				103
Total	$	105			162
Purchased Credit-Impaired Loans
Substantially all of our PCI loans were acquired from Wachovia on December 31, 2008, at which time we acquired commercial and consumer loans with a carrying value of $18.7 billion and $40.1 billion, respectively. The unpaid principal balance on December 31, 2008 was $98.2 billion for the total of commercial and consumer PCI loans. The following table presents PCI loans net of any remaining purchase accounting adjustments. Real estate 1-4 family first mortgage PCI loans are predominantly Pick-a-Pay loans.
(in millions)	Mar 31,				Dec 31,
	2015				2014
Commercial:
Commercial and industrial	$	69			75
Real estate mortgage	886				1,261
Real estate construction	123				171
Total commercial	1,078				1,507
Consumer:
Real estate 1-4 family first mortgage	21,223				21,712
Real estate 1-4 family junior lien mortgage	88				101
Total consumer	21,311				21,813
Total PCI loans (carrying value)	$	22,389			23,320
Total PCI loans (unpaid principal balance)	$	31,596			32,924
ACCRETABLE YIELD The excess of cash flows expected to be collected over the carrying value of PCI loans is referred to as the accretable yield and is recognized in interest income using an effective yield method over the remaining life of the loan, or pools of loans. The accretable yield is affected by:
•	changes in interest rate indices for variable rate PCI loans – expected future cash flows are based on the variable rates in effect at the time of the regular evaluations of cash flows expected to be collected;
•	changes in prepayment assumptions – prepayments affect the estimated life of PCI loans which may change the amount of interest income, and possibly principal, expected to be collected; and
•	changes in the expected principal and interest payments over the estimated life – updates to expected cash flows are driven by the credit outlook and actions taken with borrowers. Changes in expected future cash flows from loan modifications are included in the regular evaluations of cash flows expected to be collected.
The change in the accretable yield related to PCI loans since the merger with Wachovia is presented in the following table.
(in millions)
Balance, December 31, 2008	$	10,447
Addition of accretable yield due to acquisitions	132
Accretion into interest income (1)	(12,783		)
Accretion into noninterest income due to sales (2)	(430		)
Reclassification from nonaccretable difference for loans with improving credit-related cash flows	8,568
Changes in expected cash flows that do not affect nonaccretable difference (3)	11,856
Balance, December 31, 2014	17,790
Addition of accretable yield due to acquisitions	—
Accretion into interest income (1)	(398		)
Accretion into noninterest income due to sales (2)	(28		)
Reclassification from nonaccretable difference for loans with improving credit-related cash flows	22
Changes in expected cash flows that do not affect nonaccretable difference (3)	(61		)
Balance, March 31, 2015	$	17,325
-1	Includes accretable yield released as a result of settlements with borrowers, which is included in interest income.
-2	Includes accretable yield released as a result of sales to third parties, which is included in noninterest income.
-3	Represents changes in cash flows expected to be collected due to the impact of modifications, changes in prepayment assumptions, changes in interest rates on variable rate PCI loans and sales to third parties.
PCI ALLOWANCE  Based on our regular evaluation of estimates of cash flows expected to be collected, we may establish an allowance for a PCI loan or pool of loans, with a charge to income though the provision for losses. The following table summarizes the changes in allowance for PCI loan losses since the merger with Wachovia.
(in millions)	Commercial				Pick-a-Pay		Other		Total
							consumer
31-Dec-08	$	—			—		—		—
Provision for loan losses	1,629				—		104		1,733
Charge-offs	(1,618		)		—		(104	)	(1,722	)
Balance, December 31, 2014	11				—		—		11
Provision for loan losses	5				—		—		5
Charge-offs	(7		)		—		—		(7	)
Balance, March 31, 2015	$	9			—		—		9
COMMERCIAL PCI CREDIT QUALITY INDICATORS  The following table provides a breakdown of commercial PCI loans by risk category.
(in millions)	Commercial				Real		Real		Total
	and				estate		estate
	industrial				mortgage		construction
March 31, 2015
By risk category:
Pass	$	13			407		84		504
Criticized	56				479		39		574
Total commercial PCI loans	$	69			886		123		1,078
December 31, 2014
By risk category:
Pass	$	21			783		118		922
Criticized	54				478		53		585
Total commercial PCI loans	$	75			1,261		171		1,507
The following table provides past due information for commercial PCI loans.
(in millions)	Commercial				Real		Real		Total
	and				estate		estate
	industrial				mortgage		construction
March 31, 2015
By delinquency status:
Current-29 DPD and still accruing	$	69			811		114		994
30-89 DPD and still accruing	—				9		—		9
90+ DPD and still accruing	—				66		9		75
Total commercial PCI loans	$	69			886		123		1,078
December 31, 2014
By delinquency status:
Current-29 DPD and still accruing	$	75			1,135		161		1,371
30-89 DPD and still accruing	—				48		5		53
90+ DPD and still accruing	—				78		5		83
Total commercial PCI loans	$	75			1,261		171		1,507
CONSUMER PCI CREDIT QUALITY INDICATORS  Our consumer PCI loans were aggregated into several pools of loans at acquisition. Below, we have provided credit quality indicators based on the unpaid principal balance (adjusted for write-downs) of the individual loans included in the pool, but we have not allocated the remaining purchase accounting adjustments, which were established at a pool level. The following table provides the delinquency status of consumer PCI loans.
	March 31, 2015								December 31, 2014
(in millions)	Real estate				Real estate		Total		Real estate		Real estate		Total
	1-4 family				1-4 family				1-4 family		1-4 family
	first				junior lien				first		junior lien
	mortgage				mortgage				mortgage		mortgage
By delinquency status:
Current-29 DPD and still accruing	$	19,187			226		19,413		19,236		168		19,404
30-59 DPD and still accruing	1,782				7		1,789		1,987		7		1,994
60-89 DPD and still accruing	863				3		866		1,051		3		1,054
90-119 DPD and still accruing	364				3		367		402		2		404
120-179 DPD and still accruing	378				2		380		440		3		443
180+ DPD and still accruing	3,596				18		3,614		3,654		83		3,737
Total consumer PCI loans (adjusted unpaid principal balance)	$	26,170			259		26,429		26,770		266		27,036
Total consumer PCI loans (carrying value)	$	21,223			88		21,311		21,712		101		21,813
The following table provides FICO scores for consumer PCI loans.
	March 31, 2015								December 31, 2014
(in millions)	Real estate				Real estate		Total		Real estate		Real estate		Total
	1-4 family				1-4 family				1-4 family		1-4 family
	first				junior lien				first		junior lien
	mortgage				mortgage				mortgage		mortgage
By FICO:
< 600	$	7,398			74		7,472		7,708		75		7,783
600-639	5,267				45		5,312		5,416		53		5,469
640-679	6,552				60		6,612		6,718		69		6,787
680-719	4,083				42		4,125		4,008		39		4,047
720-759	1,706				19		1,725		1,728		13		1,741
760-799	850				9		859		875		6		881
800+	220				1		221		220		1		221
No FICO available	94				9		103		97		10		107
Total consumer PCI loans (adjusted unpaid principal balance)	$	26,170			259		26,429		26,770		266		27,036
Total consumer PCI loans (carrying value)	$	21,223			88		21,311		21,712		101		21,813
The following table shows the distribution of consumer PCI loans by LTV for real estate 1-4 family first mortgages and by CLTV for real estate 1-4 family junior lien mortgages.
	March 31, 2015								December 31, 2014
(in millions)	Real estate				Real estate		Total		Real estate		Real estate		Total
	1-4 family				1-4 family				1-4 family		1-4 family
	first				junior lien				first		junior lien
	mortgage				mortgage				mortgage		mortgage
	by LTV				by CLTV				by LTV		by CLTV
By LTV/CLTV:
0-60%	$	4,541			28		4,569		4,309		34		4,343
60.01-80%	11,204				72		11,276		11,264		71		11,335
80.01-100%	7,302				89		7,391		7,751		92		7,843
100.01-120% (1)	2,242				43		2,285		2,437		44		2,481
> 120% (1)	875				25		900		1,000		24		1,024
No LTV/CLTV available	6				2		8		9		1		10
Total consumer PCI loans (adjusted unpaid principal balance)	$	26,170			259		26,429		26,770		266		27,036
Total consumer PCI loans (carrying value)	$	21,223			88		21,311		21,712		101		21,813
-1	Reflects total loan balances with LTV/CLTV amounts in excess of 100%. In the event of default, the loss content would generally be limited to only the amount in excess of 100% LTV/CLTV.

Other_Assets

Other Assets	3 Months Ended
	Mar. 31, 2015
Other Assets [Abstract]
Other Assets
	Note 6:  Other Assets
	The components of other assets were:
	(in millions)	Mar 31,			Dec 31,
		2015			2014
	Nonmarketable equity investments:
	Cost method:
	Private equity and other	$	2,187		2,300
	Federal bank stock	4,725			4,733
	Total cost method	6,912			7,033
	Equity method:
	LIHTC investments (1)	7,464			7,278
	Private equity and other	5,121			5,132
	Total equity method	12,585			12,410
	Fair value (2)	2,549			2,512
	Total nonmarketable equity investments	22,046			21,955
	Corporate/bank-owned life insurance	19,050			18,982
	Accounts receivable (3)	30,600			27,151
	Interest receivable	5,095			4,871
	Core deposit intangibles	3,305			3,561
	Customer relationship and other amortized intangibles	800			857
	Foreclosed assets:
	Residential real estate:
	Government insured/guaranteed (3)	772			982
	Non-government insured/guaranteed	646			671
	Non-residential real estate	911			956
	Operating lease assets	3,277			2,714
	Due from customers on acceptances	222			201
	Other (4)	15,155			16,156
	Total other assets	$	101,879		99,057
	-1	Represents low income housing tax credit investments.
	-2	Represents nonmarketable equity investments for which we have elected the fair value option. See Note 13 (Fair Values of Assets and Liabilities) for additional information.
	-3	Certain government-guaranteed residential real estate mortgage loans upon foreclosure are included in Accounts receivable effective January 1, 2014. Both principal and interest related to these foreclosed real estate assets are collectible because the loans were predominantly insured by the FHA or guaranteed by the VA. For more information on ASU 2014-14 and the classification of certain government-guaranteed mortgage loans upon foreclosure, see Note 1 (Summary of Significant Accounting Policies) to Financial Statements in our 2014 10-K.
	-4	Includes derivatives designated as hedging instruments, derivatives not designated as hedging instruments, and derivative loan commitments, which are carried at fair value. See Note 12 (Derivatives) for additional information.
	Income (expense) related to nonmarketable equity investments was:
		Quarter ended Mar 31,
	(in millions)	2015			2014
	Net realized gains from nonmarketable equity investments	$	351		551
	All other	(148		)	(223	)
	Total	$	203		328
	Low Income Housing Tax Credit Investments We invest in affordable housing projects that qualify for the low income housing tax credit, which is designed to promote private development of low income housing. These investments generate a return primarily through realization of federal tax credits.
	Total low income housing tax credit (LIHTC) investments were $7.5 billion and $7.3 billion at March 31, 2015 and December 31, 2014, respectively. In first quarter 2015 we recognized pre-tax losses of $178 million related to our LIHTC investments. We also recognized total tax benefits of $276 million, which included tax credits of $209 million recorded in income taxes. We are periodically required to provide additional financial support during the investment period. Our liability for these unfunded commitments was $2.7 billion at March 31, 2015, of which predominantly all is expected to be paid over the next three years. This liability is included in Long-term debt.

Securitizations_and_Variable_I

Securitizations and Variable Interest Entities	3 Months Ended
	Mar. 31, 2015
Securitizations and Variable Interest Entities [Abstract]
Securitizations and Variable Interest Entities
	Note 7: Securitizations and Variable Interest Entities
	Involvement with SPEs
	In the normal course of business, we enter into various types of on- and off-balance sheet transactions with special purpose entities (SPEs), which are corporations, trusts or partnerships that are established for a limited purpose. Generally, SPEs are formed in connection with securitization transactions and are considered variable interest entities (VIEs). For further description of our involvement with SPEs, see Note 8 (Securitizations and Variable Interest Entities) to Financial Statements in our 2014 Form 10-K.
	We have segregated our involvement with VIEs between those VIEs which we consolidate, those which we do not consolidate and those for which we account for the transfers of financial assets as secured borrowings. Secured borrowings are transactions involving transfers of our financial assets to third parties that are accounted for as financings with the assets pledged as collateral. Accordingly, the transferred assets remain recognized on our balance sheet. Subsequent tables within this Note further segregate these transactions by structure type.
	The following table provides the classifications of assets and liabilities in our balance sheet for our transactions with VIEs.
	(in millions)	VIEs that we			VIEs		Transfers that				Total
		do not			that we		we account
		consolidate			consolidate		for as secured
							borrowings
	March 31, 2015
	Cash	$	—		155			36			191
	Trading assets	1,741			—			204			1,945
	Investment securities (1)	16,624			749			3,612			20,985
	Loans	12,415			4,830			5,032			22,277
	Mortgage servicing rights	11,589			—			—			11,589
	Other assets	7,607			314			42			7,963
	Total assets	49,976			6,048			8,926			64,950
	Short-term borrowings	—			—			2,513			2,513
	Accrued expenses and other liabilities	825			48		-2	1			874
	Long-term debt	2,690			1,562		-2	4,764			9,016
	Total liabilities	3,515			1,610			7,278			12,403
	Noncontrolling interests	—			111			—			111
	Net assets	$	46,461		4,327			1,648			52,436
	December 31, 2014
	Cash	$	—		117			4			121
	Trading assets	2,165			—			204			2,369
	Investment securities (1)	18,271			875			4,592			23,738
	Loans	13,195			4,509			5,280			22,984
	Mortgage servicing rights	12,562			—			—			12,562
	Other assets	7,456			316			52			7,824
	Total assets	53,649			5,817			10,132			69,598
	Short-term borrowings	—			—			3,141			3,141
	Accrued expenses and other liabilities	848			49		-2	1			898
	Long-term debt	2,585			1,628		-2	4,990			9,203
	Total liabilities	3,433			1,677			8,132			13,242
	Noncontrolling interests	—			103			—			103
	Net assets	$	50,216		4,037			2,000			56,253
	-1	Excludes certain debt securities related to loans serviced for the Federal National Mortgage Association (FNMA), Federal Home Loan Mortgage Corporation (FHLMC) and GNMA.
	-2	There were no VIE liabilities with recourse to the general credit of Wells Fargo for the periods presented.
	Transactions with Unconsolidated VIEs
	Our transactions with VIEs include securitizations of residential mortgage loans, CRE loans, student loans, auto loans and leases and dealer floorplan loans; investment and financing activities involving collateralized debt obligations (CDOs) backed by asset-backed and CRE securities, collateralized loan obligations (CLOs) backed by corporate loans, and other types of structured financing. We have various forms of involvement with VIEs, including servicing, holding senior or subordinated interests, entering into liquidity arrangements, credit default swaps and other derivative contracts. Involvements with these unconsolidated VIEs are recorded on our balance sheet primarily in trading assets, investment securities, loans, MSRs, other assets and other liabilities, as appropriate.
	The following tables provide a summary of unconsolidated VIEs with which we have significant continuing involvement, but we are not the primary beneficiary. We do not consider our continuing involvement in an unconsolidated VIE to be significant when it relates to third-party sponsored VIEs for which we were not the transferor (unless we are servicer and have other significant forms of involvement) or if we were the sponsor only or sponsor and servicer but do not have any other forms of significant involvement.
	Significant continuing involvement includes transactions where we were the sponsor or transferor and have other significant forms of involvement. Sponsorship includes transactions with unconsolidated VIEs where we solely or materially participated in the initial design or structuring of the entity or marketing of the transaction to investors. When we transfer assets to a VIE and account for the transfer as a sale, we are considered the transferor. We consider investments in securities (other than those held temporarily in trading), loans, guarantees, liquidity agreements, written options and servicing of collateral to be other forms of involvement that may be significant. We have excluded certain transactions with unconsolidated VIEs from the balances presented in the following table where we have determined that our continuing involvement is not significant due to the temporary nature and size of our variable interests, because we were not the transferor or because we were not involved in the design of the unconsolidated VIEs. We also exclude from the table secured borrowing transactions with unconsolidated VIEs (for information on these transactions, see the Transactions with Consolidated VIEs and Secured Borrowings section in this Note).
					Carrying value - asset (liability)
	(in millions)	Total			Debt and				Servicing			Derivatives			Other			Net
		VIE			equity				assets						commitments			assets
		assets			interests (1)										and
															guarantees
	March 31, 2015
	Residential mortgage loan securitizations:
	Conforming (2)	$	1,244,678		2,870				10,716			—			(562	)		13,024
	Other/nonconforming	30,561			1,530				195			—			(7	)		1,718
	Commercial mortgage securitizations	192,361			7,442				660			250			(23	)		8,329
	Collateralized debt obligations:
	Debt securities	4,628			6				—			160			(102	)		64
	Loans (3)	5,105			4,981				—			—			—			4,981
	Asset-based finance structures	17,341			11,881				—			(75	)		—			11,806
	Tax credit structures	23,688			8,007				—			—			(2,690	)		5,317
	Collateralized loan obligations	1,672			488				—			—			—			488
	Investment funds	2,149			49				—			—			—			49
	Other (4)	12,300			696				18			(23	)		(6	)		685
	Total	$	1,534,483		37,950				11,589			312			(3,390	)		46,461
					Maximum exposure to loss
				Debt and				Servicing			Derivatives			Other			Total
				equity				assets						commitments			exposure
				interests (1)										and
														guarantees
Residential mortgage loan securitizations:
Conforming				$	2,870			10,716			—			2,215			15,801
Other/nonconforming				1,530				195			—			347			2,072
Commercial mortgage securitizations				7,442				660			250			6,209			14,561
Collateralized debt obligations:
Debt securities				6				—			160			102			268
Loans (3)				4,981				—			—			—			4,981
Asset-based finance structures				11,881				—			91			658			12,630
Tax credit structures				8,007				—			—			774			8,781
Collateralized loan obligations				488				—			—			—			488
Investment funds				49				—			—			—			49
Other (4)				696				18			122			157			993
Total				$	37,950			11,589			623			10,462			60,624
(continued on following page)
(continued from previous page)
				Carrying value - asset (liability)
(in millions)	Total			Debt and				Servicing			Derivatives			Other			Net
	VIE			equity				assets						commitments			assets
	assets			interests (1)										and
														guarantees
December 31, 2014
Residential mortgage loan securitizations:
Conforming (2)	$	1,268,200		2,846				11,684			—			(581	)		13,949
Other/nonconforming	32,213			1,644				209			—			(8	)		1,845
Commercial mortgage securitizations	196,510			8,756				650			251			(32	)		9,625
Collateralized debt obligations:
Debt securities	5,039			11				—			163			(105	)		69
Loans (3)	5,347			5,221				—			—			—			5,221
Asset-based finance structures	18,954			13,044				—			(71	)		—			12,973
Tax credit structures	22,859			7,809				—			—			(2,585	)		5,224
Collateralized loan obligations	1,251			518				—			—			—			518
Investment funds	2,764			49				—			—			—			49
Other (4)	12,912			747				19			(18	)		(5	)		743
Total	$	1,566,049		40,645				12,562			325			(3,316	)		50,216
				Maximum exposure to loss
				Debt and				Servicing			Derivatives			Other			Total
				equity				assets						commitments			exposure
				interests (1)										and
														guarantees
Residential mortgage loan securitizations:
Conforming				$	2,846			11,684			—			2,507			17,037
Other/nonconforming				1,644				209			—			345			2,198
Commercial mortgage securitizations				8,756				650			251			5,715			15,372
Collateralized debt obligations:
Debt securities				11				—			163			105			279
Loans (3)				5,221				—			—			—			5,221
Asset-based finance structures				13,044				—			89			656			13,789
Tax credit structures				7,809				—			—			725			8,534
Collateralized loan obligations				518				—			—			38			556
Investment funds				49				—			—			—			49
Other (4)				747				19			150			156			1,072
Total				$	40,645			12,562			653			10,247			64,107
-1	Includes total equity interests of $8.2 billion and $8.1 billion at March 31, 2015, and December 31, 2014, respectively. Also includes debt interests in the form of both loans and securities. Excludes certain debt securities held related to loans serviced for FNMA, FHLMC and GNMA.
-2	Excludes assets and related liabilities with a recorded carrying value on our balance sheet of $1.1 billion and $1.7 billion at March 31, 2015, and December 31, 2014, respectively, for certain delinquent loans that are eligible for repurchase primarily from GNMA loan securitizations. The recorded carrying value represents the amount that would be payable if the Company was to exercise the repurchase option. The carrying amounts are excluded from the table because the loans eligible for repurchase do not represent interests in the VIEs.
-3	Represents senior loans to trusts that are collateralized by asset-backed securities. The trusts invest primarily in senior tranches from a diversified pool of primarily U.S. asset securitizations, of which all are current and 71% and 70% were rated as investment grade by the primary rating agencies at March 31, 2015, and December 31, 2014, respectively. These senior loans are accounted for at amortized cost and are subject to the Company’s allowance and credit charge-off policies.
-4	Includes structured financing and credit-linked note structures. Also contains investments in auction rate securities (ARS) issued by VIEs that we do not sponsor and, accordingly, are unable to obtain the total assets of the entity.
In the two preceding tables, “Total VIE assets” represents the remaining principal balance of assets held by unconsolidated VIEs using the most current information available. For VIEs that obtain exposure to assets synthetically through derivative instruments, the remaining notional amount of the derivative is included in the asset balance. “Carrying value” is the amount in our consolidated balance sheet related to our involvement with the unconsolidated VIEs. “Maximum exposure to loss” from our involvement with off-balance sheet entities, which is a required disclosure under GAAP, is determined as the carrying value of our involvement with off-balance sheet (unconsolidated) VIEs plus the remaining undrawn liquidity and lending commitments, the notional amount of net written derivative contracts, and generally the notional amount of, or stressed loss estimate for, other commitments and guarantees. It represents estimated loss that would be incurred under severe, hypothetical circumstances, for which we believe the possibility is extremely remote, such as where the value of our interests and any associated collateral declines to zero, without any consideration of recovery or offset from any economic hedges. Accordingly, this required disclosure is not an indication of expected loss.
For complete descriptions of our types of transactions with unconsolidated VIEs with which we have a significant continuing involvement, but we are not the primary beneficiary, see Note 8 (Securitizations and Variable Interest Entities) to Financial Statements in our 2014 Form 10-K.
OTHER TRANSACTIONS WITH VIEs  Auction rate securities (ARS) are debt instruments with long-term maturities, which re-price more frequently, and preferred equities with no maturity. At March 31, 2015, we held in our available-for-sale securities portfolio $541 million of ARS issued by VIEs compared with $567 million at December 31, 2014. We acquired the ARS pursuant to agreements entered into in 2008 and 2009.
We do not consolidate the VIEs that issued the ARS because we do not have power over the activities of the VIEs.
TRUST PREFERRED SECURITIES  VIEs that we wholly own issue debt securities or preferred equity to third party investors. All of the proceeds of the issuance are invested in debt securities or preferred equity that we issue to the VIEs. The VIEs’ operations and cash flows relate only to the issuance, administration and repayment of the securities held by third parties. We do not consolidate these VIEs because the sole assets of the VIEs are receivables from us, even though we own all of the voting equity shares of the VIEs, have fully guaranteed the obligations of the VIEs and may have the right to redeem the third party securities under certain circumstances. In our consolidated balance sheet at March 31, 2015, and December 31, 2014, we reported the debt securities issued to the VIEs as long-term junior subordinated debt with a carrying value of $2.2 billion and $2.1 billion, respectively, and the preferred equity securities issued to the VIEs as preferred stock with a carrying value of $2.5 billion at both dates. These amounts are in addition to the involvements in these VIEs included in the preceding table.
Loan Sales and Securitization Activity
We periodically transfer consumer and CRE loans and other types of financial assets in securitization and whole loan sale transactions. We typically retain the servicing rights from these sales and may continue to hold other beneficial interests in the transferred financial assets. We may also provide liquidity to investors in the beneficial interests and credit enhancements in the form of standby letters of credit. Through these transfers we may be exposed to liability under limited amounts of recourse as well as standard representations and warranties we make to purchasers and issuers. The following table presents the cash flows for our transfers accounted for as sales.
	2015						2014
(in millions)	Mortgage			Other			Mortgage			Other
	loans			financial			loans			financial
				assets						assets
Quarter ended March 31,
Proceeds from securitizations and whole loan sales	$	41,909		21			37,614			—
Fees from servicing rights retained	935			2			1,028			2
Cash flows from other interests held (1)	266			12			293			21
Repurchases of assets/loss reimbursements (2):
Non-agency securitizations and whole loan transactions	6			—			3			—
Agency securitizations (3)	62			—			76			—
Servicing advances, net of repayments	$	(100	)	—			(273	)		—
-1	Cash flows from other interests held include principal and interest payments received on retained bonds and excess cash flows received on interest-only strips.
-2	Consists of cash paid to repurchase loans from investors and cash paid to investors to reimburse them for losses on individual loans that are already liquidated. In addition, during first quarter 2014 we paid $78 million to third-party investors to settle repurchase liabilities on pools of loans. There were no first quarter 2015 loan pool settlements.
-3	Represent loans repurchased from GNMA, FNMA, and FHLMC under representation and warranty provisions included in our loan sales contracts. First quarter 2015 and 2014 exclude $3.3 billion and $4.1 billion, respectively, in delinquent insured/guaranteed loans that we service and have exercised our option to purchase out of GNMA pools. These loans are predominantly insured by the FHA or guaranteed by the VA.
In first quarter 2015 and 2014, we recognized net gains of $111 million and $29 million, respectively, from transfers accounted for as sales of financial assets. These net gains primarily relate to commercial mortgage securitizations and residential mortgage securitizations where the loans were not already carried at fair value.
Sales with continuing involvement during first quarter 2015 and 2014 predominantly related to securitizations of residential mortgages that are sold to the government-sponsored entities (GSEs), including FNMA, FHLMC and GNMA (conforming residential mortgage securitizations). During first quarter 2015 and 2014, we transferred $39.5 billion and $33.6 billion respectively, in fair value of residential mortgages to unconsolidated VIEs and third-party investors and recorded the transfers as sales. Substantially all of these transfers did not result in a gain or loss because the loans were already carried at fair value. In connection with all of these transfers, in first quarter 2015 we recorded a $308 million servicing asset, measured at fair value using a Level 3 measurement technique, securities of $517 million, classified as Level 2, and a $10 million liability for repurchase losses which reflects management’s estimate of probable losses related to various representations and warranties for the loans transferred, initially measured at fair value. In first quarter 2014, we recorded a $289 million servicing asset and a $10 million liability.
We used the following key weighted-average assumptions to measure residential mortgage servicing rights at the date of securitization:
	Residential mortgage
	servicing rights
	2015			2014
Quarter ended March 31,
Prepayment speed (1)	13		%	12.1
Discount rate	7.5			7.8
Cost to service ($ per loan) (2)	$	237		230
-1	The prepayment speed assumption for residential mortgage servicing rights includes a blend of prepayment speeds and default rates. Prepayment speed assumptions are influenced by mortgage interest rate inputs as well as our estimation of drivers of borrower behavior.
-2	Includes costs to service and unreimbursed foreclosure costs, which can vary period to period depending on the mix of modified government-guaranteed loans sold to GNMA.
During first quarter 2015 and 2014, we transferred $3.2 billion and $1.3 billion, respectively, in fair value of commercial mortgages to unconsolidated VIEs and third-party investors and recorded the transfers as sales, which resulted in a gain of $77 million and $24 million for the same periods, respectively, because the loans were carried at lower of cost or market value (LOCOM). In connection with these transfers, in first quarter 2015, we recorded a servicing asset of $50 million, initially measured at fair value using a Level 3 measurement technique. In first quarter 2014, we recorded a servicing asset of $3 million, using a Level 3 measurement technique.
Retained Interests from Unconsolidated VIEs
The following table provides key economic assumptions and the sensitivity of the current fair value of residential mortgage servicing rights and other retained interests to immediate adverse changes in those assumptions. “Other interests held” relate predominantly to residential and commercial mortgage loan securitizations. Residential mortgage-backed securities retained in securitizations issued through GSEs, such as FNMA, FHLMC and GNMA, are excluded from the table because these securities have a remote risk of credit loss due to the GSE guarantee. These securities also have economic characteristics similar to GSE mortgage-backed securities that we purchase, which are not included in the table. Subordinated interests include only those bonds whose credit rating was below AAA by a major rating agency at issuance. Senior interests include only those bonds whose credit rating was AAA by a major rating agency at issuance. The information presented excludes trading positions held in inventory.
				Other interests held
	Residential			Interest-only			Consumer				Commercial (2)
	mortgage			strips
	servicing
($ in millions, except cost to service amounts)	rights (1)						Subordinated				Subordinated			Senior
							bonds				bonds			bonds
Fair value of interests held at March 31, 2015	$	11,739		122			36				295			555
Expected weighted-average life (in years)	5.4			3.8			5.3				2.7			6
Key economic assumptions:
Prepayment speed assumption (3)	13.2		%	12			8.1
Decrease in fair value from:
10% adverse change	$	715		2			—
25% adverse change	1,695			6			—
Discount rate assumption	7.4		%	15.4			3.6				4.4			2.4
Decrease in fair value from:
100 basis point increase	$	563		3			2				7			28
200 basis point increase	1,072			5			3				14			55
Cost to service assumption ($ per loan)	174
Decrease in fair value from:
10% adverse change	559
25% adverse change	1,397
Credit loss assumption							0.3		%		3.9			—
Decrease in fair value from:
10% higher losses							$	—			1			—
25% higher losses							—				7			—
Fair value of interests held at December 31, 2014	$	12,738		117			36				294			546
Expected weighted-average life (in years)	5.7			3.9			5.5				2.9			6.2
Key economic assumptions:
Prepayment speed assumption (3)	12.5		%	11.4			7.1
Decrease in fair value from:
10% adverse change	$	738		2			—
25% adverse change	1,754			6			—
Discount rate assumption	7.6		%	18.7			3.9				4.7			2.8
Decrease in fair value from:
100 basis point increase	$	617		2			2				8			29
200 basis point increase	1,178			4			3				15			55
Cost to service assumption ($ per loan)	179
Decrease in fair value from:
10% adverse change	579
25% adverse change	1,433
Credit loss assumption							0.4		%		4.1			—
Decrease in fair value from:
10% higher losses							$	—			3			—
25% higher losses							—				10			—
-1	See narrative following this table for a discussion of commercial mortgage servicing rights.
-2	Prepayment speed assumptions do not significantly impact the value of commercial mortgage securitization bonds as the underlying commercial mortgage loans experience significantly lower prepayments due to certain contractual restrictions, impacting the borrower’s ability to prepay the mortgage.
-3	The prepayment speed assumption for residential mortgage servicing rights includes a blend of prepayment speeds and default rates. Prepayment speed assumptions are influenced by mortgage interest rate inputs as well as our estimation of drivers of borrower behavior.
In addition to residential mortgage servicing rights (MSRs) included in the previous table, we have a small portfolio of commercial MSRs with a fair value of $1.5 billion at March 31, 2015, and $1.6 billion at December 31, 2014. The nature of our commercial MSRs, which are carried at LOCOM, is different from our residential MSRs. Prepayment activity on serviced loans does not significantly impact the value of commercial MSRs because, unlike residential mortgages, commercial mortgages experience significantly lower prepayments due to certain contractual restrictions, impacting the borrower’s ability to prepay the mortgage. Additionally, for our commercial MSR portfolio, we are typically master/primary servicer, but not the special servicer, who is separately responsible for the servicing and workout of delinquent and foreclosed loans. It is the special servicer, similar to our role as servicer of residential mortgage loans, who is affected by higher servicing and foreclosure costs due to an increase in delinquent and foreclosed loans. Accordingly, prepayment speeds and costs to service are not key assumptions for commercial MSRs as they do not significantly impact the valuation. The primary economic driver impacting the fair value of our commercial MSRs is forward interest rates, which are derived from market observable yield curves used to price capital markets instruments. Market interest rates most significantly affect interest earned on custodial deposit balances. The sensitivity of the current fair value to an immediate adverse 25% change in the assumption about interest earned on deposit balances at March 31, 2015, and December 31, 2014, results in a decrease in fair value of $162 million and $185 million, respectively. See Note 8 (Mortgage Banking Activities) for further information on our commercial MSRs.
We also have a loan to an unconsolidated third party VIE that we extended in fourth quarter 2014 in conjunction with our sale of government guaranteed student loans. The loan is carried at amortized cost and approximates fair value at March 31, 2015, and December 31, 2014. The carrying amount of the loan at March 31, 2015, and December 31, 2014, was $6.1 billion and $6.5 billion, respectively. The estimated fair value of the loan is considered a Level 3 measurement that is determined using discounted cash flows that are based on changes in the discount rate due to changes in the risk premium component (credit spreads). The primary economic assumption impacting the fair value of our loan is the discount rate. Changes in the credit loss assumption are not expected to affect the estimated fair value of the loan due to the government guarantee of the underlying collateral. The sensitivity of the current fair value to an immediate adverse increase of 200 basis points in the risk premium component of the discount rate assumption is a decrease in fair value of $101 million and $130 million at March 31, 2015, and December 31, 2014, respectively.
The sensitivities in the preceding paragraphs and table are hypothetical and caution should be exercised when relying on this data. Changes in value based on variations in assumptions generally cannot be extrapolated because the relationship of the change in the assumption to the change in value may not be linear. Also, the effect of a variation in a particular assumption on the value of the other interests held is calculated independently without changing any other assumptions. In reality, changes in one factor may result in changes in others (for example, changes in prepayment speed estimates could result in changes in the credit losses), which might magnify or counteract the sensitivities.
Off-Balance Sheet Loans
The following table presents information about the principal balances of off-balance sheet loans that were sold or securitized, including residential mortgage loans sold to FNMA, FHLMC, GNMA and other investors, for which we have some form of continuing involvement (primarily servicer). Delinquent loans include loans 90 days or more past due and loans in bankruptcy, regardless of delinquency status. For loans sold or securitized where servicing is our only form of continuing involvement, we would only experience a loss if we were required to repurchase a delinquent loan or foreclosed asset due to a breach in representations and warranties associated with our loan sale or servicing contracts.
													Net charge-offs
	Total loans						Delinquent loans and foreclosed assets (1)						Quarter ended
	Mar 31,			Dec 31,			Mar 31,			Dec 31,			Mar 31,
(in millions)	2015			2014			2015			2014			2015			2014
Commercial:
Real estate mortgage	$	110,560		114,081			8,051			7,949			52			634
Total commercial	110,560			114,081			8,051			7,949			52			634
Consumer:
Real estate 1-4 family first mortgage	1,296,484			1,322,136			26,477			28,639			205			144
Real estate 1-4 family junior lien mortgage	—			1			—			—			—			—
Other revolving credit and installment	1,553			1,599			70			75			—			—
Total consumer	1,298,037			1,323,736			26,547			28,714			205			144
Total off-balance sheet sold or securitized loans (2)	$	1,408,597		1,437,817			34,598			36,663			257			778
-1	Includes $5.2 billion and $3.3 billion of commercial foreclosed assets and $2.6 billion and $2.7 billion of consumer foreclosed assets at March 31, 2015, and December 31, 2014, respectively.
-2	At March 31, 2015, and December 31, 2014, the table includes total loans of $1.3 trillion at both dates and delinquent loans of $15.9 billion and $16.5 billion, respectively for FNMA, FHLMC and GNMA. Net charge-offs exclude loans sold to FNMA, FHLMC and GNMA as we do not service or manage the underlying real estate upon foreclosure and, as such, do not have access to net charge-off information.
Transactions with Consolidated VIEs and Secured Borrowings
The following table presents a summary of financial assets and liabilities for asset transfers accounted for as secured borrowings and involvements with consolidated VIEs. “Assets” are presented using GAAP measurement methods, which may include fair value, credit impairment or other adjustments, and therefore in some instances will differ from “Total VIE assets.” For VIEs that obtain exposure synthetically through derivative instruments, the remaining notional amount of the derivative is included in “Total VIE assets.” On the consolidated balance sheet, we separately disclose the consolidated assets of certain VIEs that can only be used to settle the liabilities of those VIEs.
				Carrying value
(in millions)	Total VIE			Assets			Liabilities			Noncontrolling			Net assets
	assets									interests
March 31, 2015
Secured borrowings:
Municipal tender option bond securitizations	$	4,355		3,858			(2,514	)		—			1,344
Commercial real estate loans	181			181			—			—			181
Residential mortgage securitizations	4,651			4,887			(4,764	)		—			123
Total secured borrowings	9,187			8,926			(7,278	)		—			1,648
Consolidated VIEs:
Nonconforming residential mortgage loan securitizations	4,841			4,296			(1,452	)		—			2,844
Commercial real estate loans	529			529			—			—			529
Structured asset finance	46			46			(24	)		—			22
Investment funds	810			809			(1	)		—			808
Other	423			368			(133	)		(111	)		124
Total consolidated VIEs	6,649			6,048			(1,610	)		(111	)		4,327
Total secured borrowings and consolidated VIEs	$	15,836		14,974			(8,888	)		(111	)		5,975
December 31, 2014
Secured borrowings:
Municipal tender option bond securitizations	$	5,422		4,837			(3,143	)		—			1,694
Commercial real estate loans	250			250			(63	)		—			187
Residential mortgage securitizations	4,804			5,045			(4,926	)		—			119
Total secured borrowings	10,476			10,132			(8,132	)		—			2,000
Consolidated VIEs:
Nonconforming residential mortgage loan securitizations	5,041			4,491			(1,509	)		—			2,982
Structured asset finance	47			47			(23	)		—			24
Investment funds	904			904			(2	)		—			902
Other	431			375			(143	)		(103	)		129
Total consolidated VIEs	6,423			5,817			(1,677	)		(103	)		4,037
Total secured borrowings and consolidated VIEs	$	16,899		15,949			(9,809	)		(103	)		6,037
In addition to the structure types included in the previous table, at both March 31, 2015, and December 31, 2014, we had approximately $6.0 billion of private placement debt financing issued through a consolidated VIE. The issuance is classified as long-term debt in our consolidated financial statements. At March 31, 2015, we pledged approximately $613 million in loans (principal and interest eligible to be capitalized) and $5.8 billion in available-for-sale securities to collateralize the VIE’s borrowings, compared with $637 million and $5.7 billion, respectively, at December 31, 2014. These assets were not transferred to the VIE, and accordingly we have excluded the VIE from the previous table.
For complete descriptions of our accounting for transfers accounted for as secured borrowings and involvements with consolidated VIEs see Note 8 (Securitizations and Variable Interest Entities) to Financial Statements in our 2014 Form 10-K.

Mortgage_Banking_Activities

Mortgage Banking Activities	3 Months Ended
	Mar. 31, 2015
Mortgage Banking Activities [Abstract]
Mortgage Banking Activities
	Note 8:  Mortgage Banking Activities
	Mortgage banking activities, included in the Community Banking and Wholesale Banking operating segments, consist of residential and commercial mortgage originations, sale activity and servicing.
	We apply the amortization method to commercial MSRs and apply the fair value method to residential MSRs. The changes in MSRs measured using the fair value method were:
		Quarter ended March 31,
	(in millions)	2015			2014
	Fair value, beginning of period	$	12,738		15,580
	Servicing from securitizations or asset transfers	308			289
	Sales	(1		)	—
	Net additions	307			289
	Changes in fair value:
	Due to changes in valuation model inputs or assumptions:
	Mortgage interest rates (1)	(572		)	(509	)
	Servicing and foreclosure costs (2)	(18		)	(34	)
	Prepayment estimates and other (3)	(183		)	102
	Net changes in valuation model inputs or assumptions	(773		)	(441	)
	Other changes in fair value (4)	(533		)	(475	)
	Total changes in fair value	(1,306		)	(916	)
	Fair value, end of period	$	11,739		14,953
	-1	Includes prepayment speed changes as well as other valuation changes due to changes in mortgage interest rates (such as changes in estimated interest earned on custodial deposit balances).
	-2	Includes costs to service and unreimbursed foreclosure costs.
	-3	Represents changes driven by other valuation model inputs or assumptions including prepayment speed estimation changes and other assumption updates. Prepayment speed estimation changes are influenced by observed changes in borrower behavior and other external factors that occur independent of interest rate changes.
	-4	Represents changes due to collection/realization of expected cash flows over time.
	The changes in amortized MSRs were:
		Quarter ended March 31,
	(in millions)	2015			2014
	Balance, beginning of period	$	1,242		1,229
	Purchases	22			40
	Servicing from securitizations or asset transfers	50			14
	Amortization	(62		)	(64	)
	Balance, end of period (1)	$	1,252		1,219
	Fair value of amortized MSRs:
	Beginning of period	$	1,637		1,575
	End of period	1,522			1,624
	-1	Commercial amortized MSRs are evaluated for impairment purposes by the following risk strata: agency (GSEs) and non-agency. There was no valuation allowance recorded for the periods presented on the commercial amortized MSRs.
	We present the components of our managed servicing portfolio in the following table at unpaid principal balance for loans serviced and subserviced for others and at book value for owned loans serviced.
	(in billions)	Mar 31, 2015			Dec 31, 2014
	Residential mortgage servicing:
	Serviced for others	$	1,374		1,405
	Owned loans serviced	344			342
	Subserviced for others	5			5
	Total residential servicing	1,723			1,752
	Commercial mortgage servicing:
	Serviced for others	461			456
	Owned loans serviced	112			112
	Subserviced for others	7			7
	Total commercial servicing	580			575
	Total managed servicing portfolio	$	2,303		2,327
	Total serviced for others	$	1,835		1,861
	Ratio of MSRs to related loans serviced for others	0.71		%	0.75	%
	The components of mortgage banking noninterest income were:
		Quarter ended March 31,
	(in millions)	2015			2014
	Servicing income, net:
	Servicing fees:
	Contractually specified servicing fees	$	1,020		1,082
	Late charges	53			56
	Ancillary fees	71			80
	Unreimbursed direct servicing costs (1)	(134		)	(148	)
	Net servicing fees	1,010			1,070
	Changes in fair value of MSRs carried at fair value:
	Due to changes in valuation model inputs or assumptions (2)	(773		)	(441	)
	Other changes in fair value (3)	(533		)	(475	)
	Total changes in fair value of MSRs carried at fair value	(1,306		)	(916	)
Amortization	(62		)	(64	)
Net derivative gains (losses) from economic hedges (4)	881			848
Total servicing income, net	523			938
Net gains on mortgage loan origination/sales activities	1,024			572
Total mortgage banking noninterest income	$	1,547		1,510
Market-related valuation changes to MSRs, net of hedge results (2) + (4)	$	108		407
-1	Primarily associated with foreclosure expenses and unreimbursed interest advances to investors.
-2	Refer to the changes in fair value of MSRs table in this Note for more detail.
-3	Represents changes due to collection/realization of expected cash flows over time.
-4	Represents results from economic hedges used to hedge the risk of changes in fair value of MSRs. See Note 12 (Derivatives Not Designated as Hedging Instruments) for additional discussion and detail.
The table below summarizes the changes in our liability for mortgage loan repurchase losses. This liability is in “Accrued expenses and other liabilities” in our consolidated balance sheet and the provision for repurchase losses reduces net gains on mortgage loan origination/sales activities in “Mortgage banking” in our consolidated income statement.
Because of the uncertainty in the various estimates underlying the mortgage repurchase liability, there is a range of losses in excess of the recorded mortgage repurchase liability that is reasonably possible. The estimate of the range of possible loss for representations and warranties does not represent a probable loss, and is based on currently available information, significant judgment, and a number of assumptions that are subject to change. The high end of this range of reasonably possible losses in excess of our recorded liability was $936 million at March 31, 2015, and was determined based upon modifying the assumptions (particularly to assume significant changes in investor repurchase demand practices) utilized in our best estimate of probable loss to reflect what we believe to be the high end of reasonably possible adverse assumptions.
	Quarter ended March 31,
(in millions)	2015			2014
Balance, beginning of period	$	615		899
Provision for repurchase losses:
Loan sales	10			10
Change in estimate (1)	(26		)	(4	)
Total additions (reductions)	(16		)	6
Losses	(13		)	(106	)
Balance, end of period	$	586		799
-1	Results from changes in investor demand, mortgage insurer practices, credit and the financial stability of correspondent lenders.

Intangible_Assets

Intangible Assets	3 Months Ended
	Mar. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible Assets
	Note 9:  Intangible Assets
	The gross carrying value of intangible assets and accumulated amortization was:
		March 31, 2015					December 31, 2014
	(in millions)	Gross		Accumulated		Net	Gross	Accumulated		Net
		carrying		amortization		carrying	carrying	amortization		carrying
		value				value	value			value
	Amortized intangible assets (1):
	MSRs (2)	$	2,975	(1,723	)	1,252	2,906	(1,664	)	1,242
	Core deposit intangibles	12,834		(9,529	)	3,305	12,834	(9,273	)	3,561
	Customer relationship and other intangibles	3,179		(2,379	)	800	3,179	(2,322	)	857
	Total amortized intangible assets	$	18,988	(13,631	)	5,357	18,919	(13,259	)	5,660
	Unamortized intangible assets:
	MSRs (carried at fair value) (2)	$	11,739				12,738
	Goodwill	25,705					25,705
	Trademark	14					14
	-1	Excludes fully amortized intangible assets.
	-2	See Note 8 (Mortgage Banking Activities) for additional information on MSRs.
	The following table provides the current year and estimated future amortization expense for amortized intangible assets. We based our projections of amortization expense shown below on existing asset balances at March 31, 2015. Future amortization expense may vary from these projections.
	(in millions)	Amortized MSRs		Core deposit		Customer	Total
				intangibles		relationship and
						other
						intangibles
	Three months ended March 31, 2015 (actual)	$	62	256		57	375
	Estimate for the remainder of 2015	$	189	766		169	1,124
	Estimate for year ended December 31,
	2016	213		919		211	1,343
	2017	167		851		197	1,215
	2018	137		769		188	1,094
	2019	121		—		12	133
	2020	107		—		8	115
	For our goodwill impairment analysis, we allocate all of the goodwill to the individual operating segments. We identify reporting units that are one level below an operating segment (referred to as a component), and distinguish these reporting units based on how the segments and components are managed, taking into consideration the economic characteristics, nature of the products and customers of the components. At the time we acquire a business, we allocate goodwill to applicable reporting units based on their relative fair value, and if we have a significant business reorganization, we may reallocate the goodwill. See Note 18 (Operating Segments) for further information on management reporting.
	The following table shows the allocation of goodwill to our reportable operating segments for purposes of goodwill impairment testing.
	(in millions)	Community		Wholesale		Wealth,	Consolidated
		Banking		Banking		Brokerage and	Company
						Retirement
	December 31, 2013 and March 31, 2014	$	17,922	7,344		371	25,637
	December 31, 2014 and March 31, 2015	$	17,914	7,420		371	25,705

Guarantees_Pledged_Assets_and_

Guarantees, Pledged Assets and Collateral	3 Months Ended
	Mar. 31, 2015
Guarantees [Abstract]
Guarantees, Pledged Assets and Collateral
	Note 10:  Guarantees, Pledged Assets and Collateral
	Guarantees are contracts that contingently require us to make payments to a guaranteed party based on an event or a change in an underlying asset, liability, rate or index. Guarantees are generally in the form of standby letters of credit, securities lending and other indemnifications, written put options, recourse obligations, and other types of arrangements. For complete descriptions of our guarantees, see Note 14 (Guarantees, Pledged Assets and Collateral) to Financial Statements in our 2014 Form 10-K. The following table shows carrying value, maximum exposure to loss on our guarantees and the related non-investment grade amounts.
		31-Mar-15
					Maximum exposure to loss
	(in millions)	Carrying			Expires in		Expires after	Expires after	Expires	Total	Non-
		value			one year		one year	three years	after five		investment
					or less		through	through	years		grade
							three years	five years
	Standby letters of credit (1)	$	57		16,267		10,695	5,644	640	33,246	8,433
	Securities lending and other indemnifications (2)	—			—		—	—	6,153	6,153	—
	Written put options (3)	611			8,421		5,642	3,081	2,308	19,452	8,399
	Loans and MHFS sold with recourse (4)	63			115		641	702	5,716	7,174	4,367
	Factoring guarantees (5)	—			2,043		—	—	—	2,043	2,043
	Other guarantees	24			42		52	22	2,197	2,313	69
	Total guarantees	$	755		26,888		17,030	9,449	17,014	70,381	23,311
		31-Dec-14
					Maximum exposure to loss
	(in millions)	Carrying			Expires in		Expires after	Expires after	Expires	Total	Non-
		value			one year		one year	three years	after five		investment
					or less		through	through	years		grade
							three years	five years
	Standby letters of credit (1)	$	41		16,271		10,269	6,295	645	33,480	8,447
	Securities lending and other indemnifications (2)	—			—		2	2	5,948	5,952	—
	Written put options (3)	469			7,644		5,256	2,822	2,409	18,131	7,902
	Loans and MHFS sold with recourse (4)	72			131		486	822	5,386	6,825	3,945
	Factoring guarantees (5)	—			3,460		—	—	—	3,460	3,460
	Other guarantees	24			9		85	22	2,158	2,274	69
	Total guarantees	$	606		27,515		16,098	9,963	16,546	70,122	23,823
	-1	Total maximum exposure to loss includes direct pay letters of credit (DPLCs) of $14.4 billion and $15.0 billion at March 31, 2015 and December 31, 2014, respectively. We issue DPLCs to provide credit enhancements for certain bond issuances. Beneficiaries (bond trustees) may draw upon these instruments to make scheduled principal and interest payments, redeem all outstanding bonds because a default event has occurred, or for other reasons as permitted by the agreement. We also originate multipurpose lending commitments under which borrowers have the option to draw on the facility in one of several forms, including as a standby letter of credit. Total maximum exposure to loss includes the portion of these facilities for which we have issued standby letters of credit under the commitments.
	-2	Includes $33 million and $211 million at March 31, 2015 and December 31, 2014, respectively, in debt and equity securities lent from participating institutional client portfolios to third-party borrowers. Also includes indemnifications provided to certain third-party clearing agents. Outstanding customer obligations under these arrangements were $1.1 billion and $950 million with related collateral of $5.4 billion and $5.6 billion at March 31, 2015 and December 31, 2014, respectively. Estimated maximum exposure to loss was $6.1 billion and $5.7 billion as of the same periods, respectively.
	-3	Written put options, which are in the form of derivatives, are also included in the derivative disclosures in Note 12 (Derivatives).
	-4	Represent recourse provided, predominantly to the GSEs, on loans sold under various programs and arrangements. Under these arrangements, we repurchased $1 million of loans associated with these agreements in both first quarter 2015 and 2014.
	-5	Consists of guarantees made under certain factoring arrangements to purchase trade receivables from third parties, generally upon their request, if receivable debtors default on their payment obligations.
	“Maximum exposure to loss” and “Non-investment grade” are required disclosures under GAAP. Non-investment grade represents those guarantees on which we have a higher risk of being required to perform under the terms of the guarantee. If the underlying assets under the guarantee are non-investment grade (that is, an external rating that is below investment grade or an internal credit default grade that is equivalent to a below investment grade external rating), we consider the risk of performance to be high. Internal credit default grades are determined based upon the same credit policies that we use to evaluate the risk of payment or performance when making loans and other extensions of credit. These credit policies are further described in Note 5 (Loans and Allowance for Credit Losses).
	Maximum exposure to loss represents the estimated loss that would be incurred under an assumed hypothetical circumstance, despite what we believe is its extremely remote possibility, where the value of our interests and any associated collateral declines to zero. Maximum exposure to loss estimates in the table above do not reflect economic hedges or collateral we could use to offset or recover losses we may incur under our guarantee agreements. Accordingly, this required disclosure is not an indication of expected loss. We believe the carrying value, which is either fair value for derivative-related products or the allowance for lending-related commitments, is more representative of our exposure to loss than maximum exposure to loss.
	Pledged Assets
	As part of our liquidity management strategy, we pledge assets to secure trust and public deposits, borrowings and letters of credit from the FHLB and FRB, securities sold under agreements to repurchase (repurchase agreements), and for other purposes as required or permitted by law or insurance statutory requirements. The types of collateral we pledge include securities issued by federal agencies, GSEs, domestic and foreign companies and various commercial and consumer loans. The following table provides the total carrying amount of pledged assets by asset type. The table excludes pledged consolidated VIE assets of $6.0 billion and $5.8 billion at March 31, 2015, and December 31, 2014, respectively, which can only be used to settle the liabilities of those entities. The table also excludes $8.9 billion and $10.1 billion in assets pledged in transactions accounted for as secured borrowings at March 31, 2015 and December 31, 2014, respectively. See Note 7 (Securitizations and Variable Interest Entities) for additional information on consolidated VIE assets and secured borrowings.
	(in millions)	Mar. 31,			Dec. 31,
		2015			2014
	Trading assets and other (1)	$	69,685		49,685
	Investment securities (2)	94,333			101,997
	Mortgages held for sale and Loans (3)	426,953			418,338
	Total pledged assets	$	590,971		570,020
	-1	Represent assets pledged to collateralize repurchase agreements and other securities financings. Balance includes $69.2 billion and $49.4 billion at March 31, 2015, and December 31, 2014, respectively, under agreements that permit the secured parties to sell or repledge the collateral.
	-2	Includes carrying value of $5.8 billion and $6.6 billion (fair value of $5.8 billion and $6.8 billion) in collateral for repurchase agreements at March 31, 2015, and December 31, 2014, respectively, which are pledged under agreements that do not permit the secured parties to sell or repledge the collateral. Also includes $2.7 billion and $164 million in collateral pledged under repurchase agreements at March 31, 2015, and December 31, 2014, respectively, that permit the secured parties to sell or repledge the collateral.
	-3	Includes mortgages held for sale of $11.1 billion and $8.7 billion at March 31, 2015 and December 31, 2014, respectively. Balance consists of mortgages held for sale and loans that are pledged under agreements that do not permit the secured parties to sell or repledge the collateral. Amounts exclude $1.1 billion and $1.7 billion at March 31, 2015 and December 31, 2014, respectively, of pledged loans recorded on our balance sheet representing certain delinquent loans that are eligible for repurchase primarily from GNMA loan securitizations. See Note 7 (Securitizations and Variable Interest Entities) for additional information.
	Offsetting of Resale and Repurchase Agreements and Securities Borrowing and Lending Agreements
	The table below presents resale and repurchase agreements subject to master repurchase agreements (MRA) and securities borrowing and lending agreements subject to master securities lending agreements (MSLA). We account for transactions subject to these agreements as collateralized financings, and those with a single counterparty are presented net on our balance sheet, provided certain criteria are met that permit balance sheet netting. Most transactions subject to these agreements do not meet those criteria and thus are not eligible for balance sheet netting.
	Collateral we pledged consists of non-cash instruments, such as securities or loans, and is not netted on the balance sheet against the related collateralized liability. Collateral we received includes securities or loans and is not recognized on our balance sheet. Collateral received or pledged may be increased or decreased over time to maintain certain contractual thresholds as the assets underlying each arrangement fluctuate in value. Generally, these agreements require collateral to exceed the asset or liability recognized on the balance sheet. The following table includes the amount of collateral pledged or received related to exposures subject to enforceable MRAs or MSLAs. While these agreements are typically over-collateralized, U.S. GAAP requires disclosure in this table to limit the amount of such collateral to the amount of the related recognized asset or liability for each counterparty.
	In addition to the amounts included in the table below, we also have balance sheet netting related to derivatives that is disclosed within Note 12 (Derivatives).
	(in millions)	Mar 31,			Dec 31,
		2015			2014
	Assets:
	Resale and securities borrowing agreements
	Gross amounts recognized	$	69,122		58,148
	Gross amounts offset in consolidated balance sheet (1)	(14,247		)	(6,477	)
	Net amounts in consolidated balance sheet (2)	54,875			51,671
	Collateral not recognized in consolidated balance sheet (3)	(54,592		)	(51,624	)
	Net amount (4)	$	283		47
	Liabilities:
	Repurchase and securities lending agreements
	Gross amounts recognized	$	77,643		56,583
	Gross amounts offset in consolidated balance sheet (1)	(14,247		)	(6,477	)
Net amounts in consolidated balance sheet (5)	63,396			50,106
Collateral pledged but not netted in consolidated balance sheet (6)	(62,540		)	(49,713	)
Net amount (7)	$	856		393
-1	Represents recognized amount of resale and repurchase agreements with counterparties subject to enforceable MRAs or MSLAs that have been offset in the consolidated balance sheet.
-2	At March 31, 2015 and December 31, 2014, includes $40.1 billion and $36.8 billion, respectively, classified on our consolidated balance sheet in Federal funds sold, securities purchased under resale agreements and other short-term investments and $14.8 billion and $14.9 billion, respectively, in Loans.
-3	Represents the fair value of collateral we have received under enforceable MRAs or MSLAs, limited for table presentation purposes to the amount of the recognized asset due from each counterparty. At March 31, 2015 and December 31, 2014, we have received total collateral with a fair value of $76.4 billion and $64.5 billion, respectively, all of which, we have the right to sell or repledge. These amounts include securities we have sold or repledged to others with a fair value of $52.7 billion at March 31, 2015 and $40.8 billion at December 31, 2014.
-4	Represents the amount of our exposure that is not collateralized and/or is not subject to an enforceable MRA or MSLA.
-5	Amount is classified in Short-term borrowings on our consolidated balance sheet.
-6	Represents the fair value of collateral we have pledged, related to enforceable MRAs or MSLAs, limited for table presentation purposes to the amount of the recognized liability owed to each counterparty. At March 31, 2015 and December 31, 2014, we have pledged total collateral with a fair value of $78.2 billion and $56.5 billion, respectively, of which, the counterparty does not have the right to sell or repledge $6.3 billion as of March 31, 2015 and $6.9 billion as of December 31, 2014.
-7	Represents the amount of our obligation that is not covered by pledged collateral and/or is not subject to an enforceable MRA or MSLA.

Legal_Actions

Legal Actions	3 Months Ended
	Mar. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Legal Actions
	Note 11:  Legal Actions
	The following supplements our discussion of certain matters previously reported in Note 15 (Legal Actions) to Financial Statements in our 2014 Form 10-K for events occurring during first quarter 2015.
	ORDER OF POSTING LITIGATION  A series of putative class actions have been filed against Wachovia Bank, N.A. and Wells Fargo Bank, N.A., as well as many other banks, challenging the high to low order in which the banks post debit card transactions to consumer deposit accounts. There are currently several such cases pending against Wells Fargo Bank (including the Wachovia Bank cases to which Wells Fargo succeeded), most of which have been consolidated in multi-district litigation proceedings in the U.S. District Court for the Southern District of Florida. The bank defendants moved to compel these cases to arbitration under Supreme Court authority. On November 22, 2011, the Judge denied the motion. The bank defendants appealed the decision to the U.S. Court of Appeals for the Eleventh Circuit. On October 26, 2012, the Eleventh Circuit affirmed the District Court’s denial of the motion. Wells Fargo renewed its motion to compel arbitration with respect to the unnamed putative class members. On April 8, 2013, the District Court denied the motion and Wells Fargo appealed the decision to the Eleventh Circuit. On February 10, 2015, the Eleventh Circuit vacated the order based on the District Court's lack of jurisdiction until class certification has been determined, and remanded to the District Court for further proceedings.
	On August 10, 2010, the U.S. District Court for the Northern District of California issued an order in Gutierrez v. Wells Fargo Bank, N.A., a case that was not consolidated in the multi-district proceedings, enjoining the bank’s use of the high to low posting method for debit card transactions with respect to the plaintiff class of California depositors, directing the bank to establish a different posting methodology and ordering remediation of approximately $203 million. On October 26, 2010, a final judgment was entered in Gutierrez. On October 28, 2010, Wells Fargo appealed to the U.S. Court of Appeals for the Ninth Circuit. On December 26, 2012, the Ninth Circuit reversed the order requiring Wells Fargo to change its order of posting and vacated the portion of the order granting remediation of approximately $203 million on the grounds of federal preemption. The Ninth Circuit affirmed the District Court’s finding that Wells Fargo violated a California state law prohibition on fraudulent representations and remanded the case to the District Court for further proceedings. On August 5, 2013, the District Court entered a judgment against Wells Fargo in the approximate amount of $203 million, together with post-judgment interest thereon from October 25, 2010, and, effective as of July 15, 2013, enjoined Wells Fargo from making or disseminating additional misrepresentations about its order of posting of transactions. On August 7, 2013, Wells Fargo appealed the judgment to the Ninth Circuit. On October 29, 2014, the Ninth Circuit affirmed the trial court’s judgment against Wells Fargo for approximately $203 million, but limited the injunction to debit card transactions. Wells Fargo filed a petition for writ of certiorari to the United States Supreme Court on April 10, 2015.
	SECURITIES LENDING LITIGATION  Wells Fargo Bank, N.A. was involved in four separate actions brought by securities lending customers of Wells Fargo and Wachovia Bank in various courts. In general, each of the cases alleges losses based on claims that Wells Fargo violated fiduciary and contractual duties in its investment of collateral for loaned securities. Blue Cross/Blue Shield of Minnesota, et al., v. Wells Fargo Bank, N.A. resulted in verdicts dismissing the claims against Wells Fargo. Plaintiffs have appealed the verdicts. Wells Fargo has resolved one of the other cases and the remaining cases are expected to go to trial in 2015.
	OUTLOOK  When establishing a liability for contingent litigation losses, the Company determines a range of potential losses for each matter that is both probable and estimable, and records the amount it considers to be the best estimate within the range. The high end of the range of reasonably possible potential litigation losses in excess of the Company’s liability for probable and estimable losses was approximately $1.2 billion as of March 31, 2015. For these matters and others where an unfavorable outcome is reasonably possible but not probable, there may be a range of possible losses in excess of the established liability that cannot be estimated. Based on information currently available, advice of counsel, available insurance coverage and established reserves, Wells Fargo believes that the eventual outcome of the actions against Wells Fargo and/or its subsidiaries, including the matters described above, will not, individually or in the aggregate, have a material adverse effect on Wells Fargo’s consolidated financial position. However, in the event of unexpected future developments, it is possible that the ultimate resolution of those matters, if unfavorable, may be material to Wells Fargo’s results of operations for any particular period.

Derivatives

Derivatives	3 Months Ended
	Mar. 31, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives
	Note 12:  Derivatives
	We primarily use derivatives to manage exposure to market risk, including interest rate risk, credit risk and foreign currency risk, and to assist customers with their risk management objectives. We designate certain derivatives as hedging instruments in a qualifying hedge accounting relationship (fair value or cash flow hedge). Our remaining derivatives consist of economic hedges that do not qualify for hedge accounting and derivatives held for customer accommodation, trading, or other purposes. For more information on our derivative activities, see Note 16 (Derivatives) to Financial Statements in our 2014 Form 10-K.
	The following table presents the total notional or contractual amounts and fair values for our derivatives. Derivative transactions can be measured in terms of the notional amount, but this amount is not recorded on the balance sheet and is not, when viewed in isolation, a meaningful measure of the risk profile of the instruments. The notional amount is generally not exchanged but is used only as the basis on which interest and other payments are determined. Derivatives designated as qualifying hedging instruments and economic hedges are recorded on the balance sheet at fair value in other assets or other liabilities. Customer accommodation, trading and other derivatives are recorded on the balance sheet at fair value in trading assets, other assets or other liabilities.
		March 31, 2015										December 31, 2014
		Notional or							Fair value			Notional or					Fair value
		contractual										contractual
	(in millions)	amount			Asset				Liability			amount		Asset			Liability
					derivatives				derivatives					derivatives			derivatives
	Derivatives designated as hedging instruments
	Interest rate contracts (1)	$	161,185		8,349				2,956			148,967		6,536			2,435
	Foreign exchange contracts (1)	26,369			688				2,739			26,778		752			1,347
	Total derivatives designated as qualifying hedging instruments				9,037				5,695					7,288			3,782
	Derivatives not designated as hedging instruments
	Economic hedges:
	Interest rate contracts (2)	238,419			775				643			221,527		697			487
	Equity contracts	5,959			432				50			5,219		367			96
	Foreign exchange contracts	16,722			462				58			14,405		275			28
	Subtotal				1,669				751					1,339			611
	Customer accommodation, trading and other derivatives:
	Interest rate contracts	4,886,284			74,070				74,584			4,378,767		56,465			57,137
	Commodity contracts	76,664			6,879				7,523			88,640		7,461			7,702
	Equity contracts	139,526			8,698				6,733			138,422		8,638			6,942
	Foreign exchange contracts	256,071			8,601				8,819			253,742		6,377			6,452
	Credit contracts - protection sold	13,207			172				851			12,304		151			943
	Credit contracts - protection purchased	17,936			710				194			16,659		755			168
	Other contracts	1,954			—				52			1,994		—			44
	Subtotal				99,130				98,756					79,847			79,388
	Total derivatives not designated as hedging instruments				100,799				99,507					81,186			79,999
	Total derivatives before netting				109,836				105,202					88,474			83,781
	Netting (3)				(88,129		)		(86,777	)				(65,869	)		(65,043	)
	Total				$	21,707			18,425					22,605			18,738
	-1	Notional amounts presented exclude $1.9 billion of interest rate contracts at both March 31, 2015 and December 31, 2014, for certain derivatives that are combined for designation as a hedge on a single instrument. The notional amount for foreign exchange contracts at March 31, 2015, and December 31, 2014 excludes $2.4 billion and $2.7 billion, respectively, for certain derivatives that are combined for designation as a hedge on a single instrument.
	-2	Includes economic hedge derivatives used to hedge the risk of changes in the fair value of residential MSRs, MHFS, loans, derivative loan commitments and other interests held.
	-3	Represents balance sheet netting of derivative asset and liability balances, related cash collateral and portfolio level counterparty valuation adjustments. See the next table in this Note for further information.
	The following table provides information on the gross fair values of derivative assets and liabilities, the balance sheet netting adjustments and the resulting net fair value amount recorded on our balance sheet, as well as the non-cash collateral associated with such arrangements. We execute the majority of our derivative transactions under master netting arrangements. We reflect all derivative balances and related cash collateral subject to enforceable master netting arrangements on a net basis within the balance sheet. The “Gross amounts recognized” column in the following table includes $90.0 billion and $95.9 billion of gross derivative assets and liabilities, respectively, at March 31, 2015, and $69.6 billion and $75.0 billion, respectively, at December 31, 2014, with counterparties subject to enforceable master netting arrangements that are carried on the balance sheet net of offsetting amounts. The remaining gross derivative assets and liabilities of $19.8 billion and $9.3 billion, respectively, at March 31, 2015 and $18.9 billion and $8.8 billion, respectively, at December 31, 2014, include those with counterparties subject to master netting arrangements for which we have not assessed the enforceability because they are with counterparties where we do not currently have positions to offset, those subject to master netting arrangements where we have not been able to confirm the enforceability and those not subject to master netting arrangements. As such,we do not net derivative balances or collateral within the balance sheet for these counterparties.
	We determine the balance sheet netting adjustments based on the terms specified within each master netting arrangement. We disclose the balance sheet netting amounts within the column titled “Gross amounts offset in consolidated balance sheet.” Balance sheet netting adjustments are determined at the counterparty level for which there may be multiple contract types. For disclosure purposes, we allocate these adjustments to the contract type for each counterparty proportionally based upon the “Gross amounts recognized” by counterparty. As a result, the net amounts disclosed by contract type may not represent the actual exposure upon settlement of the contracts.Balance sheet netting does not include non-cash collateral that we receive and pledge. For disclosure purposes, we present the fair value of this non-cash collateral in the column titled “Gross amounts not offset in consolidated balance sheet (Disclosure-only netting)” within the table. We determine and allocate the Disclosure-only netting amounts in the same manner as balance sheet netting amounts.
	The “Net amounts” column within the following table represents the aggregate of our net exposure to each counterparty after considering the balance sheet and Disclosure-only netting adjustments. We manage derivative exposure by monitoring the credit risk associated with each counterparty using counterparty specific credit risk limits, using master netting arrangements and obtaining collateral. Derivative contracts executed in over-the-counter markets include bilateral contractual arrangements that are not cleared through a central clearing organization but are typically subject to master netting arrangements. The percentage of our bilateral derivative transactions outstanding at period end in such markets, based on gross fair value, is provided within the following table. Other derivative contracts executed in over-the-counter or exchange-traded markets are settled through a central clearing organization and are excluded from this percentage. In addition to the netting amounts included in the table, we also have balance sheet netting related to resale and repurchase agreements that are disclosed within Note 10 (Guarantees, Pledged Assets and Collateral).
	(in millions)	Gross			Gross amounts			Net amounts in			Gross amounts		Net			Percent
		amounts			offset in			consolidated			not offset in		amounts			exchanged in
		recognized			consolidated			balance			consolidated					over-the-counter
					balance			sheet (2)			balance sheet					market (4)
					sheet (1)						(Disclosure-only
											netting) (3)
	March 31, 2015
	Derivative assets
	Interest rate contracts	$	83,194		(77,500	)		5,694			(877	)	4,817			35	%
	Commodity contracts	6,879			(1,308	)		5,571			(1	)	5,570			29
	Equity contracts	9,130			(2,992	)		6,138			(447	)	5,691			54
	Foreign exchange contracts	9,751			(5,586	)		4,165			(13	)	4,152			98
	Credit contracts-protection sold	172			(117	)		55			—		55			71
	Credit contracts-protection purchased	710			(626	)		84			(2	)	82			100
	Total derivative assets	$	109,836		(88,129	)		21,707			(1,340	)	20,367
	Derivative liabilities
	Interest rate contracts	$	78,183		(73,377	)		4,806			(3,593	)	1,213			31	%
	Commodity contracts	7,523			(1,411	)		6,112			(189	)	5,923			83
	Equity contracts	6,783			(2,511	)		4,272			(334	)	3,938			84
	Foreign exchange contracts	11,616			(8,530	)		3,086			(273	)	2,813			100
	Credit contracts-protection sold	851			(826	)		25			(22	)	3			100
	Credit contracts-protection purchased	194			(122	)		72			(72	)	—			65
	Other contracts	52			—			52			—		52			100
	Total derivative liabilities	$	105,202		(86,777	)		18,425			(4,483	)	13,942
	December 31, 2014
	Derivative assets
Interest rate contracts	$	63,698		(56,051	)		7,647			(769	)	6,878			45	%
Commodity contracts	7,461			(1,233	)		6,228			(72	)	6,156			27
Equity contracts	9,005			(2,842	)		6,163			(405	)	5,758			54
Foreign exchange contracts	7,404			(4,923	)		2,481			(85	)	2,396			98
Credit contracts-protection sold	151			(131	)		20			—		20			90
Credit contracts-protection purchased	755			(689	)		66			(1	)	65			100
Total derivative assets	$	88,474		(65,869	)		22,605			(1,332	)	21,273
Derivative liabilities
Interest rate contracts	$	60,059		(54,394	)		5,665			(4,244	)	1,421			44	%
Commodity contracts	7,702			(1,459	)		6,243			(33	)	6,210			81
Equity contracts	7,038			(2,845	)		4,193			(484	)	3,709			82
Foreign exchange contracts	7,827			(5,511	)		2,316			(270	)	2,046			100
Credit contracts-protection sold	943			(713	)		230			(199	)	31			100
Credit contracts-protection purchased	168			(121	)		47			(18	)	29			86
Other contracts	44			—			44			—		44			100
Total derivative liabilities	$	83,781		(65,043	)		18,738			(5,248	)	13,490
-1	Represents amounts with counterparties subject to enforceable master netting arrangements that have been offset in the consolidated balance sheet, including related cash collateral and portfolio level counterparty valuation adjustments. Counterparty valuation adjustments were $313 million and $266 million related to derivative assets and $50 million and $56 million related to derivative liabilities at March 31, 2015 and December 31, 2014, respectively. Cash collateral totaled $6.8 billion and $5.7 billion , netted against derivative assets and liabilities, respectively, at March 31, 2015, and $5.2 billion and $4.6 billion, respectively, at December 31, 2014.
-2	Net derivative assets of $17.1 billion and $16.9 billion are classified in Trading assets at March 31, 2015 and December 31, 2014, respectively. $4.6 billion and $5.7 billion are classified in Other assets in the consolidated balance sheet at March 31, 2015 and December 31, 2014, respectively. Net derivative liabilities are classified in Accrued expenses and other liabilities in the consolidated balance sheet.
-3	Represents non-cash collateral pledged and received against derivative assets and liabilities with the same counterparty that are subject to enforceable master netting arrangements. U.S. GAAP does not permit netting of such non-cash collateral balances in the consolidated balance sheet but requires disclosure of these amounts.
-4	Represents derivatives executed in over-the-counter markets that are not settled through a central clearing organization. Over-the-counter percentages are calculated based on gross amounts recognized as of the respective balance sheet date. The remaining percentage represents derivatives settled through a central clearing organization, which are executed in either over-the-counter or exchange-traded markets.
Fair Value Hedges
We use derivatives to hedge against changes in fair value of certain financial instruments, including available-for-sale debt securities, mortgages held for sale, and long-term debt. For more information on fair value hedges, see Note 16 (Derivatives) to Financial Statements in our 2014 Form 10-K.
The following table shows the net gains (losses) recognized in the income statement related to derivatives in fair value hedging relationships. The entire derivative gain or loss is included in the assessment of hedge effectiveness for all fair value hedge relationships, except for those involving foreign-currency denominated available-for-sale securities and long-term debt hedged with foreign currency forward derivatives for which the time value component of the derivative gain or loss related to the changes in the difference between the spot and forward price is excluded from the assessment of hedge effectiveness.
	Interest rate									Foreign exchange					Total net
	contracts hedging:									contracts hedging:					gains
															(losses)
															on fair
															value
(in millions)	Available-			Mortgages			Long-term			Available-		Long-term			hedges
	for-sale			held for			debt			for-sale		debt
	securities			sale						securities
Quarter ended March 31, 2015
Net interest income (expense) recognized on derivatives	$	(186	)	(3	)		472			1		61			345
Gains (losses) recorded in noninterest income
Recognized on derivatives	(666		)	(13	)		1,258			280		(1,887	)		(1,028	)
Recognized on hedged item	661			10			(1,150	)		(269	)	1,949			1,201
Net recognized on fair value hedges (ineffective portion) (1)	$	(5	)	(3	)		108			11		62			173
Quarter ended March 31, 2014
Net interest income (expense) recognized on derivatives	$	(175	)	(3	)		448			(2	)	73			341
Gains (losses) recorded in noninterest income
Recognized on derivatives	(505		)	(15	)		988			(14	)	74			528
Recognized on hedged item	497			11			(853	)		11		(74	)		(408	)
Net recognized on fair value hedges (ineffective portion) (1)	$	(8	)	(4	)		135			(3	)	—			120
-1	Included $(1) million and $0 million, respectively, for the quarters ended March 31, 2015 and 2014, of the time value component recognized as net interest income (expense) on forward derivatives hedging foreign currency available-for-sale securities and long-term debt that were excluded from the assessment of hedge effectiveness.
Cash Flow Hedges
We use derivatives to hedge certain financial instruments against future interest rate increases and to limit the variability of cash flows on certain financial instruments due to changes in the benchmark interest rate. For more information on cash flow hedges, see Note 16 (Derivatives) to Financial Statements in our 2014 Form 10-K.
Based upon current interest rates, we estimate that $852 million (pre tax) of deferred net gains on derivatives in OCI at March 31, 2015, will be reclassified into net interest income during the next twelve months. Future changes to interest rates may significantly change actual amounts reclassified to earnings. We are hedging our exposure to the variability of future cash flows for all forecasted transactions for a maximum of 7 years.
The following table shows the net gains (losses) recognized related to derivatives in cash flow hedging relationships.
	Quarter ended March 31,
(in millions)	2015			2014
Gains (losses) (pre tax) recognized in OCI on derivatives	$	952		44
Gains (pre tax) reclassified from cumulative OCI into net income (1)	234			106
Gains (losses) (pre tax) recognized in noninterest income for hedge ineffectiveness (2)	1			—
-1	See Note 17 (Other Comprehensive Income) for detail on components of net income.
-2	None of the change in value of the derivatives was excluded from the assessment of hedge effectiveness.
Derivatives Not Designated as Hedging Instruments
We use economic hedges primarily to hedge the risk of changes in the fair value of certain residential MHFS, certain loans held for investment, residential MSRs measured at fair value, derivative loan commitments and other interests held. The resulting gain or loss on these economic hedge derivatives is reflected in mortgage banking noninterest income, net gains (losses) from equity investments and other noninterest income.
The derivatives used to hedge MSRs measured at fair value, resulted in net derivative gains of $881 million in first quarter 2015, and $848 million in first quarter 2014, which are included in mortgage banking noninterest income. The aggregate fair value of these derivatives was a net asset of $489 million at March 31, 2015, and $492 million at December 31, 2014. The change in fair value of these derivatives for each period end is due to changes in the underlying market indices and interest rates as well as the purchase and sale of derivative financial instruments throughout the period as part of our dynamic MSR risk management process.
Interest rate lock commitments for mortgage loans that we intend to sell are considered derivatives. The aggregate fair value of derivative loan commitments on the balance sheet was a net asset of $200 million and $98 million at March 31, 2015, and December 31, 2014, respectively, and is included in the caption “Interest rate contracts” under “Customer accommodation, trading and other derivatives” in the first table in this Note.
For more information on economic hedges and other derivatives, see Note 16 (Derivatives) to Financial Statements in our 2014 Form 10-K.
The following table shows the net gains recognized in the income statement related to derivatives not designated as hedging instruments.
	Quarter ended March 31,
(in millions)	2015			2014
Net gains (losses) recognized on economic hedges derivatives:
Interest rate contracts
Recognized in noninterest income:
Mortgage banking (1)	$	647		366
Other (2)	(64		)	(59	)
Equity contracts (3)	(20		)	76
Foreign exchange contracts (2)	648			69
Subtotal (4)	1,211			452
Net gains (losses) recognized on customer accommodation, trading and other derivatives:
Interest rate contracts
Recognized in noninterest income:
Mortgage banking (5)	387			290
Other (6)	(93		)	(391	)
Commodity contracts (6)	31			50
Equity contracts (6)	189			(94	)
Foreign exchange contracts (6)	110			262
Credit contracts (6)	(8		)	27
Other (4)(6)	(8		)	(7	)
Subtotal (4)	608			137
Net gains recognized related to derivatives not designated as hedging instruments	$	1,819		589
-1	Predominantly mortgage banking noninterest income including gains (losses) on the derivatives used as economic hedges of MSRs measured at fair value, interest rate lock commitments and mortgages held for sale.
-2	Predominantly included in other noninterest income.
-3	Predominantly included in net gains (losses) from equity investments in noninterest income.
-4	Prior period has been revised to conform with current period presentation.
-5	Predominantly mortgage banking noninterest income including gains (losses) on interest rate lock commitments.
-6	Predominantly included in net gains from trading activities in noninterest income.
Credit Derivatives
Credit derivative contracts are arrangements whose value is derived from the transfer of credit risk of a reference asset or entity from one party (the purchaser of credit protection) to another party (the seller of credit protection). We use credit derivatives primarily to assist customers with their risk management objectives. We may also use credit derivatives in structured product transactions or liquidity agreements written to special purpose vehicles. The maximum exposure of sold credit derivatives is managed through posted collateral, purchased credit derivatives and similar products in order to achieve our desired credit risk profile. This credit risk management provides an ability to recover a significant portion of any amounts that would be paid under the sold credit derivatives. We would be
required to perform under the noted credit derivatives in the event of default by the referenced obligors. Events of default include events such as bankruptcy, capital restructuring or lack of principal and/or interest payment. In certain cases, other triggers may exist, such as the credit downgrade of the referenced obligors or the inability of the special purpose vehicle for which we have provided liquidity to obtain funding.
The following table provides details of sold and purchased credit derivatives.
				Notional amount
(in millions)	Fair value			Protection			Protection			Protection		Net			Other			Range of
	liability			sold (A)			sold -			purchased		protection			protection			maturities
							non-			with		sold			purchased
							investment			identical		(A) - (B)
							grade			underlyings (B)
March 31, 2015
Credit default swaps on:
Corporate bonds	$	15		5,978			2,269			4,457		1,521			2,622			2015 - 2021
Structured products	586			971			790			572		399			236			2017 - 2052
Credit protection on:
Default swap index	—			2,906			427			2,106		800			1,286			2015 - 2020
Commercial mortgage-backed securities index	230			965			—			747		218			384			2047 - 2052
Asset-backed securities index	19			51			1			1		50			78			2045 - 2046
Other	1			2,336			2,336			—		2,336			5,447			2015 - 2025
Total credit derivatives	$	851		13,207			5,823			7,883		5,324			10,053
December 31, 2014
Credit default swaps on:
Corporate bonds	$	23		6,344			2,904			4,894		1,450			2,831			2015 - 2021
Structured products	654			1,055			874			608		447			277			2017 - 2052
Credit protection on:
Default swap index	—			1,659			292			777		882			1,042			2015 - 2019
Commercial mortgage-backed securities index	246			1,058			—			608		450			355			2047 - 2063
Asset-backed securities index	19			52			1			1		51			81			2045 - 2046
Other	1			2,136			2,136			—		2,136			5,185			2015 - 2025
Total credit derivatives	$	943		12,304			6,207			6,888		5,416			9,771
Protection sold represents the estimated maximum exposure to loss that would be incurred under an assumed hypothetical circumstance, where the value of our interests and any associated collateral declines to zero, without any consideration of recovery or offset from any economic hedges. We believe this hypothetical circumstance to be an extremely remote possibility and accordingly, this required disclosure is not an indication of expected loss. The amounts under non-investment grade represent the notional amounts of those credit derivatives on which we have a higher risk of being required to perform under the terms of the credit derivative and are a function of the underlying assets.
We consider the risk of performance to be high if the underlying assets under the credit derivative have an external rating that is below investment grade or an internal credit default grade that is equivalent thereto. We believe the net protection sold, which is representative of the net notional amount of protection sold and purchased with identical underlyings, in combination with other protection purchased, is more representative of our exposure to loss than either non-investment grade or protection sold. Other protection purchased represents additional protection, which may offset the exposure to loss for protection sold, that was not purchased with an identical underlying of the protection sold.
Credit-Risk Contingent Features
Certain of our derivative contracts contain provisions whereby if the credit rating of our debt were to be downgraded by certain major credit rating agencies, the counterparty could demand additional collateral or require termination or replacement of derivative instruments in a net liability position. The aggregate fair value of all derivative instruments with such credit-risk-related contingent features that are in a net liability position was $13.4 billion at March 31, 2015, and $13.6 billion at December 31, 2014, for which we posted $9.3 billion and $10.5 billion, respectively, in collateral in the normal course of business. If the credit rating of our debt had been downgraded below investment grade, which is the credit-risk-related contingent feature that if triggered requires the maximum amount of collateral to be posted, on March 31, 2015, or December 31, 2014, we would have been required to post additional collateral of $4.1 billion or $3.1 billion, respectively, or potentially settle the contract in an amount equal to its fair value. Some contracts require that we provide more collateral than the fair value of derivatives that are in a net liability position if a downgrade occurs.
Counterparty Credit Risk
By using derivatives, we are exposed to counterparty credit risk if counterparties to the derivative contracts do not perform as expected. If a counterparty fails to perform, our counterparty credit risk is equal to the amount reported as a derivative asset on our balance sheet. The amounts reported as a derivative asset are derivative contracts in a gain position, and to the extent subject to legally enforceable master netting arrangements, net of derivatives in a loss position with the same counterparty and cash collateral received. We minimize counterparty credit risk through credit approvals, limits, monitoring procedures, executing master netting arrangements and obtaining collateral, where appropriate. To the extent the master netting arrangements and other criteria meet the applicable requirements, including determining the legal enforceability of the arrangement, it is our policy to present derivative balances and related cash collateral amounts net on the balance sheet. We incorporate credit valuation adjustments (CVA) to reflect counterparty credit risk in determining the fair value of our derivatives. Such adjustments, which consider the effects of enforceable master netting agreements and collateral arrangements, reflect market-based views of the credit quality of each counterparty. Our CVA calculation is determined based on observed credit spreads in the credit default swap market and indices indicative of the credit quality of the counterparties to our derivatives.

Fair_Values_of_Assets_and_Liab

Fair Values of Assets and Liabilities	3 Months Ended
	Mar. 31, 2015
Fair Value Disclosures [Abstract]
Fair Values of Assets and Liabilities
	Note 13:  Fair Values of Assets and Liabilities
	We use fair value measurements to record fair value adjustments to certain assets and liabilities and to determine fair value disclosures. Assets and liabilities recorded at fair value on a recurring basis are presented in the recurring table in this Note. From time to time, we may be required to record at fair value other assets on a nonrecurring basis, such as certain residential and commercial MHFS, certain LHFS, loans held for investment and certain other assets. These nonrecurring fair value adjustments typically involve application of lower-of-cost-or-market accounting or write-downs of individual assets.
	See Note 1 (Summary of Significant Accounting Policies) to Financial Statements in our 2014 Form 10-K for discussion of how we determine fair value. For descriptions of the valuation methodologies we use for assets and liabilities recorded at fair value on a recurring or nonrecurring basis and for estimating fair value for financial instruments that are not recorded at fair value, see Note 17 (Fair Values of Assets and Liabilities) to Financial Statements in our 2014 Form 10-K.
	FAIR VALUE HIERARCHY  We group our assets and liabilities measured at fair value in three levels based on the markets in which the assets and liabilities are traded and the reliability of the assumptions used to determine fair value. These levels are:
	•	Level 1 – Valuation is based upon quoted prices for identical instruments traded in active markets.
	•	Level 2 – Valuation is based upon quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active, and model-based valuation techniques for which all significant assumptions are observable in the market.
	•	Level 3 – Valuation is generated from techniques that use significant assumptions not observable in the market. These unobservable assumptions reflect estimates of assumptions that market participants would use in pricing the asset or liability. Valuation techniques include use of option pricing models, discounted cash flow models and similar techniques.
	Fair Value Measurements from Vendors
	For certain assets and liabilities, we obtain fair value measurements from vendors, which predominantly consist of third party pricing services, and record the unadjusted fair value in our financial statements. For additional information, see Note 17 (Fair Values of Assets and Liabilities) to Financial Statements in our 2014 Form 10-K. The detail by level is shown in the table below. Fair value measurements obtained from brokers or third party pricing services that we have adjusted to determine the fair value recorded in our financial statements are not included in the following table.
		Brokers										Third party pricing services
	(in millions)	Level 1				Level 2			Level 3			Level 1			Level 2		Level 3
	March 31, 2015
	Trading assets (excluding derivatives)	$	—			—			—			—			68		—
	Available-for-sale securities:
	Securities of U.S. Treasury and federal agencies	—				—			—			24,023			6,008		—
	Securities of U.S. states and political subdivisions	—				27			—			—			45,359		59
	Mortgage-backed securities	—				187			—			—			127,606		104
	Other debt securities (1)	—				1,002			626			—			43,676		520
	Total debt securities	—				1,216			626			24,023			222,649		683
	Total marketable equity securities	—				—			—			—			570		—
	Total available-for-sale securities	—				1,216			626			24,023			223,219		683
	Derivatives (trading and other assets)	—				—			—			—			286		—
	Derivatives (liabilities)	—				—			—			—			(281	)	—
	Other liabilities	—				—			—			—			—		—
	December 31, 2014
	Trading assets (excluding derivatives)	$	—			—			—			2			105		—
	Available-for-sale securities:
	Securities of U.S. Treasury and federal agencies	—				—			—			19,899			5,905		—
	Securities of U.S. states and political subdivisions	—				—			—			—			42,666		61
	Mortgage-backed securities	—				152			—			—			135,997		133
	Other debt securities (1)	—				1,035			601			—			41,933		541
	Total debt securities	—				1,187			601			19,899			226,501		735
	Total marketable equity securities	—				—			—			—			569		—
	Total available-for-sale securities	—				1,187			601			19,899			227,070		735
	Derivatives (trading and other assets)	—				1			—			—			290		—
	Derivatives (liabilities)	—				(1	)		—			—			(292	)	—
	Other liabilities	—				—			—			—			(1	)	—
	-1	Includes corporate debt securities, collateralized loan and other debt obligations, asset-backed securities, and other debt securities.
	Assets and Liabilities Recorded at Fair Value on a Recurring Basis
	The following two tables present the balances of assets and liabilities recorded at fair value on a recurring basis.
	(in millions)	Level 1				Level 2			Level 3			Netting			Total
	March 31, 2015
	Trading assets (excluding derivatives)
	Securities of U.S. Treasury and federal agencies	$	10,161			4,430			—			—			14,591
	Securities of U.S. states and political subdivisions	—				3,034			6			—			3,040
	Collateralized loan and other debt obligations (1)	—				288			381			—			669
	Corporate debt securities	—				8,455			31			—			8,486
	Mortgage-backed securities	—				19,575			—			—			19,575
	Asset-backed securities	—				780			81			—			861
	Equity securities	13,676				122			10			—			13,808
	Total trading securities (2)	23,837				36,684			509			—			61,030
	Other trading assets	—				1,117			64			—			1,181
	Total trading assets (excluding derivatives)	23,837				37,801			573			—			62,211
	Securities of U.S. Treasury and federal agencies	24,023				6,008			—			—			30,031
	Securities of U.S. states and political subdivisions	—				45,400			1,980		-3	—			47,380
	Mortgage-backed securities:
	Federal agencies	—				103,217			—			—			103,217
	Residential	—				8,723			—			—			8,723
	Commercial	—				15,885			104			—			15,989
	Total mortgage-backed securities	—				127,825			104			—			127,929
	Corporate debt securities	83				14,738			312			—			15,133
	Collateralized loan and other debt obligations (4)	—				26,669			1,053		-3	—			27,722
	Asset-backed securities:
Auto loans and leases	—				33			249		-3	—			282
Home equity loans	—				567			—			—			567
Other asset-backed securities	—				3,827			1,206		-3	—			5,033
Total asset-backed securities	—				4,427			1,455			—			5,882
Other debt securities	—				22			—			—			22
Total debt securities	24,106				225,089			4,904			—			254,099
Marketable equity securities:
Perpetual preferred securities (5)	482				570			640		-3	—			1,692
Other marketable equity securities	1,788				24			—			—			1,812
Total marketable equity securities	2,270				594			640			—			3,504
Total available-for-sale securities	26,376				225,683			5,544			—			257,603
Mortgages held for sale	—				16,917			2,098			—			19,015
Loans held for sale	—				1			—			—			1
Loans	—				—			5,730			—			5,730
Mortgage servicing rights (residential)	—				—			11,739			—			11,739
Derivative assets:
Interest rate contracts	83				82,639			472			—			83,194
Commodity contracts	—				6,858			21			—			6,879
Equity contracts	4,234				3,711			1,185			—			9,130
Foreign exchange contracts	54				9,697			—			—			9,751
Credit contracts	—				449			433			—			882
Netting	—				—			—			(88,129	)	-6	(88,129	)
Total derivative assets (7)	4,371				103,354			2,111			(88,129	)		21,707
Other assets	—				—			2,628			—			2,628
Total assets recorded at fair value	$	54,584			383,756			30,423			(88,129	)		380,634
Derivative liabilities:
Interest rate contracts	$	(30	)		(78,119	)		(34	)		—			(78,183	)
Commodity contracts	—				(7,500	)		(23	)		—			(7,523	)
Equity contracts	(1,054		)		(4,358	)		(1,371	)		—			(6,783	)
Foreign exchange contracts	(52		)		(11,564	)		—			—			(11,616	)
Credit contracts	—				(458	)		(587	)		—			(1,045	)
Other derivative contracts	—				—			(52	)		—			(52	)
Netting	—				—			—			86,777		-6	86,777
Total derivative liabilities (7)	(1,136		)		(101,999	)		(2,067	)		86,777			(18,425	)
Short sale liabilities:
Securities of U.S. Treasury and federal agencies	(11,032		)		(1,377	)		—			—			(12,409	)
Securities of U.S. states and political subdivisions	—				(18	)		—			—			(18	)
Corporate debt securities	—				(4,552	)		—			—			(4,552	)
Equity securities	(2,476		)		(3	)		—			—			(2,479	)
Other securities	—				(316	)		(15	)		—			(331	)
Total short sale liabilities	(13,508		)		(6,266	)		(15	)		—			(19,789	)
Other liabilities (excluding derivatives)	—				—			(27	)		—			(27	)
Total liabilities recorded at fair value	$	(14,644	)		(108,265	)		(2,109	)		86,777			(38,241	)
-1	The entire balance only consists of collateralized loan obligations.
-2	Net gains from trading activities recognized in the income statement for the quarters ended March 31, 2015 and 2014 include $(430) million and $(3) million in net unrealized losses on trading securities held at March 31, 2015 and 2014, respectively.
-3	Balances consist of securities that are mostly investment grade based on ratings received from the ratings agencies or internal credit grades categorized as investment grade if external ratings are not available. The securities are classified as Level 3 due to limited market activity.
-4	Includes collateralized debt obligations of $487 million.
-5	Perpetual preferred securities include ARS and corporate preferred securities. See Note 7 (Securitizations and Variable Interest Entities) for additional information.
-6	Represents balance sheet netting of derivative asset and liability balances, related cash collateral and portfolio level counterparty valuation adjustments. See Note 12 (Derivatives) for additional information.
-7	Derivative assets and derivative liabilities include contracts qualifying for hedge accounting, economic hedges, and derivatives included in trading assets and trading liabilities, respectively.
(continued on following page)
(continued from previous page)
(in millions)	Level 1				Level 2			Level 3			Netting			Total
December 31, 2014
Trading assets (excluding derivatives)
Securities of U.S. Treasury and federal agencies	$	10,506			3,886			—			—			14,392
Securities of U.S. states and political subdivisions	—				1,537			7			—			1,544
Collateralized loan and other debt obligations (1)	—				274			445			—			719
Corporate debt securities	—				7,517			54			—			7,571
Mortgage-backed securities	—				16,273			—			—			16,273
Asset-backed securities	—				776			79			—			855
Equity securities	18,512				38			10			—			18,560
Total trading securities (2)	29,018				30,301			595			—			59,914
Other trading assets	—				1,398			55			—			1,453
Total trading assets (excluding derivatives)	29,018				31,699			650			—			61,367
Securities of U.S. Treasury and federal agencies	19,899				5,905			—			—			25,804
Securities of U.S. states and political subdivisions	—				42,667			2,277		-3	—			44,944
Mortgage-backed securities:
Federal agencies	—				110,089			—			—			110,089
Residential	—				9,245			24			—			9,269
Commercial	—				16,885			109			—			16,994
Total mortgage-backed securities	—				136,219			133			—			136,352
Corporate debt securities	83				14,451			252			—			14,786
Collateralized loan and other debt obligations (4)	—				24,274			1,087		-3	—			25,361
Asset-backed securities:
Auto loans and leases	—				31			245		-3	—			276
Home equity loans	—				662			—			—			662
Other asset-backed securities	—				4,189			1,372		-3	—			5,561
Total asset-backed securities	—				4,882			1,617			—			6,499
Other debt securities	—				20			—			—			20
Total debt securities	19,982				228,418			5,366			—			253,766
Marketable equity securities:
Perpetual preferred securities (5)	468				569			663		-3	—			1,700
Other marketable equity securities	1,952				24			—			—			1,976
Total marketable equity securities	2,420				593			663			—			3,676
Total available-for-sale securities	22,402				229,011			6,029			—			257,442
Mortgages held for sale	—				13,252			2,313			—			15,565
Loans held for sale	—				1			—			—			1
Loans	—				—			5,788			—			5,788
Mortgage servicing rights (residential)	—				—			12,738			—			12,738
Derivative assets:
Interest rate contracts	27				63,306			365			—			63,698
Commodity contracts	—				7,438			23			—			7,461
Equity contracts	4,102				3,544			1,359			—			9,005
Foreign exchange contracts	65				7,339			—			—			7,404
Credit contracts	—				440			466			—			906
Netting	—				—			—			(65,869	)	-6	(65,869	)
Total derivative assets (7)	4,194				82,067			2,213			(65,869	)		22,605
Other assets	—				—			2,593			—			2,593
Total assets recorded at fair value	$	55,614			356,030			32,324			(65,869	)		378,099
Derivative liabilities:
Interest rate contracts	$	(29	)		(59,958	)		(72	)		—			(60,059	)
Commodity contracts	—				(7,680	)		(22	)		—			(7,702	)
Equity contracts	(1,290		)		(4,305	)		(1,443	)		—			(7,038	)
Foreign exchange contracts	(60		)		(7,767	)		—			—			(7,827	)
Credit contracts	—				(456	)		(655	)		—			(1,111	)
Other derivative contracts	—				—			(44	)		—			(44	)
Netting	—				—			—			65,043		-6	65,043
Total derivative liabilities (7)	(1,379		)		(80,166	)		(2,236	)		65,043			(18,738	)
Short sale liabilities:
Securities of U.S. Treasury and federal agencies	(7,043		)		(1,636	)		—			—			(8,679	)
Securities of U.S. states and political subdivisions	—				(26	)		—			—			(26	)
Corporate debt securities	—				(5,055	)		—			—			(5,055	)
Equity securities	(2,259		)		(2	)		—			—			(2,261	)
Other securities	—				(73	)		(6	)		—			(79	)
Total short sale liabilities	(9,302		)		(6,792	)		(6	)		—			(16,100	)
Other liabilities (excluding derivatives)	—				—			(28	)		—			(28	)
Total liabilities recorded at fair value	$	(10,681	)		(86,958	)		(2,270	)		65,043			(34,866	)
-1	The entire balance only consists of collateralized loan obligations.
-2	Net gains from trading activities recognized in the income statement for the year ended December 31, 2014, include $211 million in net unrealized losses on trading securities held at December 31, 2014.
-3	Balances consist of securities that are mostly investment grade based on ratings received from the ratings agencies or internal credit grades categorized as investment grade if external ratings are not available. The securities are classified as Level 3 due to limited market activity.
-4	Includes collateralized debt obligations of $500 million.
-5	Perpetual preferred securities include ARS and corporate preferred securities. See Note 7 (Securitizations and Variable Interest Entities) for additional information.
-6	Represents balance sheet netting of derivative asset and liability balances, related cash collateral and portfolio level counterparty valuation adjustments. See Note 12 (Derivatives) for additional information.
-7	Derivative assets and derivative liabilities include contracts qualifying for hedge accounting, economic hedges, and derivatives included in trading assets and trading liabilities, respectively.
Changes in Fair Value Levels
We monitor the availability of observable market data to assess the appropriate classification of financial instruments within the fair value hierarchy and transfer between Level 1, Level 2, and Level 3 accordingly. Observable market data includes but is not limited to quoted prices and market transactions. Changes in economic conditions or market liquidity generally will drive changes in availability of observable market data. Changes in availability of observable market data, which also may result in changing the valuation technique used, are generally the cause of transfers between Level 1, Level 2, and Level 3.
Transfers into and out of Level 1, Level 2, and Level 3 for the periods presented are provided within the following table. The amounts reported as transfers represent the fair value as of the beginning of the quarter in which the transfer occurred.
	Transfers Between Fair Value Levels
	Level 1							Level 2						Level 3 (1)
(in millions)	In				Out			In			Out			In		Out		Total
Quarter ended March 31, 2015
Trading assets (excluding derivatives)	$	15			(2	)		10			(16	)		1		(8	)	—
Available-for-sale securities	—				—			52			—			—		(52	)	—
Mortgages held for sale	—				—			67			(42	)		42		(67	)	—
Loans	—				—			—			—			—		—		—
Net derivative assets and liabilities (2)	—				—			34			12			(12	)	(34	)	—
Short sale liabilities	(1		)		—			—			1			—		—		—
Total transfers	$	14			(2	)		163			(45	)		31		(161	)	—
Quarter ended March 31, 2014
Trading assets (excluding derivatives	$	—			—			2			(28	)		28		(2	)	—
Available-for-sale securities	—				(8	)		8			(95	)		95		—		—
Mortgages held for sale	—				—			24			(57	)		57		(24	)	—
Loans	—				—			49			—			—		(49	)	—
Net derivative assets and liabilities (2)	—				—			45			(3	)		3		(45	)	—
Short sale liabilities	—				—			—			—			—		—		—
Total transfers	$	—			(8	)		128			(183	)		183		(120	)	—
-1	All transfers in and out of Level 3 are disclosed within the recurring Level 3 rollforward table in this Note.
-2	Includes net derivative assets that were transferred from Level 3 to Level 2 due to increased observable market data. Also includes net derivative liabilities that were transferred from Level 2 to Level 3 due to a decrease in observable market data.
The changes in Level 3 assets and liabilities measured at fair value on a recurring basis for the quarter ended March 31, 2015, are summarized as follows:
					Total net gains						Purchases,									Net unrealized
					(losses) included in						sales,									gains (losses)
											issuances									included in
											and									income related
											settlements,									to assets and
											net (1)									liabilities held
(in millions)	Balance,				Net			Other						Transfers		Transfers		Balance,		at period end		-2
	beginning				income			compre-						into		out of		end of
	of period							hensive						Level 3		Level 3		period
								income
Quarter ended March 31, 2015
Trading assets (excluding derivatives):
Securities of U.S. states and	$	7			—			—			(1	)		—		—		6		—
political subdivisions
Collateralized loan and other	445				21			—			(85	)		—		—		381		(3	)
debt obligations
Corporate debt securities	54				2			—			(18	)		—		(7	)	31		—
Mortgage-backed securities	—				—			—			—			—		—		—		—
Asset-backed securities	79				16			—			(14	)		—		—		81		16
Equity securities	10				—			—			—			—		—		10		—
Total trading securities	595				39			—			(118	)		—		(7	)	509		13
Other trading assets	55				6			—			3			1		(1	)	64		8
Total trading assets	650				45			—			(115	)		1		(8	)	573		21		-3
(excluding derivatives)
Available-for-sale securities:
Securities of U.S. states and	2,277				(1	)		(3	)		(241	)		—		(52	)	1,980		(5	)
political subdivisions
Mortgage-backed securities:
Residential	24				4			(6	)		(22	)		—		—		—		—
Commercial	109				1			(1	)		(5	)		—		—		104		—
Total mortgage-backed securities	133				5			(7	)		(27	)		—		—		104		—
Corporate debt securities	252				—			—			60			—		—		312		—
Collateralized loan and other	1,087				29			(16	)		(47	)		—		—		1,053		—
debt obligations
Asset-backed securities:
Auto loans and leases	245				—			4			—			—		—		249		—
Home equity loans	—				—			—			—			—		—		—		—
Other asset-backed securities	1,372				1			(11	)		(156	)		—		—		1,206		—
Total asset-backed securities	1,617				1			(7	)		(156	)		—		—		1,455		—
Total debt securities	5,366				34			(33	)		(411	)		—		(52	)	4,904		(5	)	-4
Marketable equity securities:
Perpetual preferred securities	663				3			(2	)		(24	)		—		—		640		—
Total marketable	663				3			(2	)		(24	)		—		—		640		—		-5
equity securities
Total available-for-sale	6,029				37			(35	)		(435	)		—		(52	)	5,544		(5	)
securities
Mortgages held for sale	2,313				38			—			(228	)		42		(67	)	2,098		22		-6
Loans	5,788				(6	)		—			(52	)		—		—		5,730		(2	)	-6
Mortgage servicing rights (residential) (7)	12,738				(1,306	)		—			307			—		—		11,739		(773	)	-6
Net derivative assets and liabilities:
Interest rate contracts	293				482			—			(337	)		—		—		438		214
Commodity contracts	1				(1	)		—			—			(2	)	—		(2	)	(2	)
Equity contracts	(84		)		(7	)		—			(51	)		(10	)	(34	)	(186	)	(33	)
Foreign exchange contracts	—				—			—			—			—		—		—		—
Credit contracts	(189		)		(2	)		—			37			—		—		(154	)	(1	)
Other derivative contracts	(44		)		(8	)		—			—			—		—		(52	)	(9	)
Total derivative contracts	(23		)		464			—			(351	)		(12	)	(34	)	44		169		-8
Other assets	2,593				38			—			(3	)		—		—		2,628		37		-3
Short sale liabilities	(6		)		—			—			(9	)		—		—		(15	)	—		-3
Other liabilities (excluding derivatives)	(28		)		1			—			—			—		—		(27	)	—		-6
-1	See next page for detail.
-2	Represents only net gains (losses) that are due to changes in economic conditions and management’s estimates of fair value and excludes changes due to the collection/realization of cash flows over time.
-3	Included in net gains (losses) from trading activities and other noninterest income in the income statement.
-4	Included in net gains (losses) from debt securities in the income statement.
-5	Included in net gains (losses) from equity investments in the income statement.
-6	Included in mortgage banking and other noninterest income in the income statement.
-7	For more information on the changes in mortgage servicing rights, see Note 8 (Mortgage Banking Activities).
-8	Included in mortgage banking, trading activities, equity investments and other noninterest income in the income statement.
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The following table presents gross purchases, sales, issuances and settlements related to the changes in Level 3 assets and liabilities measured at fair value on a recurring basis for the quarter ended March 31, 2015.
(in millions)	Purchases				Sales			Issuances			Settlements			Net
Quarter ended March 31, 2015
Trading assets (excluding derivatives):
Securities of U.S. states and political subdivisions	$	—			(1	)		—			—			(1	)
Collateralized loan and other debt obligations	400				(485	)		—			—			(85	)
Corporate debt securities	15				(33	)		—			—			(18	)
Mortgage-backed securities	—				—			—			—			—
Asset-backed securities	—				(5	)		—			(9	)		(14	)
Equity securities	—				—			—			—			—
Total trading securities	415				(524	)		—			(9	)		(118	)
Other trading assets	3				—			—			—			3
Total trading assets (excluding derivatives)	418				(524	)		—			(9	)		(115	)
Available-for-sale securities:
Securities of U.S. states and political subdivisions	—				(20	)		55			(276	)		(241	)
Mortgage-backed securities:
Residential	—				(22	)		—			—			(22	)
Commercial	—				(5	)		—			—			(5	)
Total mortgage-backed securities	—				(27	)		—			—			(27	)
Corporate debt securities	60				—			—			—			60
Collateralized loan and other debt obligations	44				(3	)		—			(88	)		(47	)
Asset-backed securities:
Auto loans and leases	—				—			—			—			—
Home equity loans	—				—			—			—			—
Other asset-backed securities	—				(1	)		59			(214	)		(156	)
Total asset-backed securities	—				(1	)		59			(214	)		(156	)
Total debt securities	104				(51	)		114			(578	)		(411	)
Marketable equity securities:
Perpetual preferred securities	—				—			—			(24	)		(24	)
Total marketable equity securities	—				—			—			(24	)		(24	)
Total available-for-sale securities	104				(51	)		114			(602	)		(435	)
Mortgages held for sale	53				(291	)		120			(110	)		(228	)
Loans	66				—			95			(213	)		(52	)
Mortgage servicing rights (residential)	—				(1	)		308			—			307
Net derivative assets and liabilities:
Interest rate contracts	—				—			—			(337	)		(337	)
Commodity contracts	—				—			—			—			—
Equity contracts	—				(32	)		—			(19	)		(51	)
Foreign exchange contracts	—				—			—			—			—
Credit contracts	2				—			—			35			37
Other derivative contracts	—				—			—			—			—
Total derivative contracts	2				(32	)		—			(321	)		(351	)
Other assets	—				—			—			(3	)		(3	)
Short sale liabilities	6				(15	)		—			—			(9	)
Other liabilities (excluding derivatives)	—				—			—			—			—
The changes in Level 3 assets and liabilities measured at fair value on a recurring basis for the quarter ended March 31, 2014, are summarized as follows:
	Balance,				Total net gains						Purchases,									Net unrealized
	beginning				(losses) included in						sales,									gains (losses)
	of period										issuances									included in
											and									income related
											settlements,									to assets and
											net (1)									liabilities held
(in millions)					Net			Other						Transfers		Transfers		Balance,		at period end		-2
					income			compre-						into		out of		end of
								hensive						Level 3		Level 3		period
								income
Quarter ended March 31, 2014
Trading assets (excluding derivatives):
Securities of U.S. states and	$	39			—			—			1			—		—		40		—
political subdivisions
Collateralized loan and other	541				11			—			52			4		—		608		(10	)
debt obligations
Corporate debt securities	53				1			—			9			24		(1	)	86		—
Mortgage-backed securities	1				—			—			—			—		—		1		—
Asset-backed securities	122				14			—			(38	)		—		(1	)	97		14
Equity securities	13				—			—			—			—		—		13		—
Total trading securities	769				26			—			24			28		(2	)	845		4
Other trading assets	54				(2	)		—			—			—		—		52		1
Total trading assets	823				24			—			24			28		(2	)	897		5		-3
(excluding derivatives)
Available-for-sale securities:
Securities of U.S. states and	3,214				9			2			(132	)		6		—		3,099		—
political subdivisions
Mortgage-backed securities:
Residential	64				10			(3	)		(30	)		—		—		41		—
Commercial	138				1			11			(9	)		—		—		141		(2	)
Total mortgage-backed securities	202				11			8			(39	)		—		—		182		(2	)
Corporate debt securities	281				4			7			5			—		—		297		—
Collateralized loan and other	1,420				43			(13	)		(30	)		—		—		1,420		—
debt obligations
Asset-backed securities:
Auto loans and leases	492				—			(3	)		(215	)		—		—		274		—
Home equity loans	—				—			—			—			—		—		—		—
Other asset-backed securities	1,657				1			(4	)		(463	)		89		—		1,280		—
Total asset-backed securities	2,149				1			(7	)		(678	)		89		—		1,554		—
Total debt securities	7,266				68			(3	)		(874	)		95		—		6,552		(2	)	-4
Marketable equity securities:
Perpetual preferred securities	729				3			(4	)		(20	)		—		—		708		—
Total marketable equity securities	729				3			(4	)		(20	)		—		—		708		—		-5
Total available-for-sale	7,995				71			(7	)		(894	)		95		—		7,260		(2	)
securities
Mortgages held for sale	2,374				2			—			(46	)		57		(24	)	2,363		2		-6
Loans	5,723				2			—			13			—		(49	)	5,689		4		-6
Mortgage servicing rights (residential) (7)	15,580				(916	)		—			289			—		—		14,953		(441	)	-6
Net derivative assets and liabilities:
Interest rate contracts	(40		)		362			—			(264	)		—		—		58		77
Commodity contracts	(10		)		(31	)		—			1			(3	)	—		(43	)	(39	)
Equity contracts	(46		)		22			—			39			6		(45	)	(24	)	(36	)
Foreign exchange contracts	9				2			—			(5	)		—		—		6		(2	)
Credit contracts	(375		)		11			—			96			—		—		(268	)	1
Other derivative contracts	(3		)		(8	)		—			—			—		—		(11	)	—
Total derivative contracts	(465		)		358			—			(133	)		3		(45	)	(282	)	1		-8
Other assets	1,503				(63	)		—			600			—		—		2,040		(4	)	-3
Short sale liabilities	—				—			—			(5	)		—		—		(5	)	—		-3
Other liabilities (excluding derivatives)	(39		)		—			—			2			—		—		(37	)	—		-6
-1	See next page for detail.
-2	Represents only net gains (losses) that are due to changes in economic conditions and management’s estimates of fair value and excludes changes due to the collection/realization of cash flows over time.
-3	Included in net gains (losses) from trading activities and other noninterest income in the income statement.
-4	Included in net gains (losses) from debt securities in the income statement.
-5	Included in net gains (losses) from equity investments in the income statement.
-6	Included in mortgage banking and other noninterest income in the income statement.
-7	For more information on the changes in mortgage servicing rights, see Note 8 (Mortgage Banking Activities).
-8	Included in mortgage banking, trading activities, equity investments and other noninterest income in the income statement.
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The following table presents gross purchases, sales, issuances and settlements related to the changes in Level 3 assets and liabilities measured at fair value on a recurring basis for the quarter ended March 31, 2014.
(in millions)	Purchases				Sales			Issuances			Settlements			Net
Quarter ended March 31, 2014
Trading assets (excluding derivatives):
Securities of U.S. states and political subdivisions	$	5			(4	)		—			—			1
Collateralized loan and other debt obligations	324				(270	)		—			(2	)		52
Corporate debt securities	15				(6	)		—			—			9
Mortgage-backed securities	—				—			—			—			—
Asset-backed securities	10				(38	)		—			(10	)		(38	)
Equity securities	—				—			—			—			—
Total trading securities	354				(318	)		—			(12	)		24
Other trading assets	—				—			—			—			—
Total trading assets (excluding derivatives)	354				(318	)		—			(12	)		24
Available-for-sale securities:
Securities of U.S. states and political subdivisions	73				(55	)		11			(161	)		(132	)
Mortgage-backed securities:
Residential	—				(28	)		—			(2	)		(30	)
Commercial	—				(8	)		—			(1	)		(9	)
Total mortgage-backed securities	—				(36	)		—			(3	)		(39	)
Corporate debt securities	—				(1	)		11			(5	)		5
Collateralized loan and other debt obligations	124				(32	)		—			(122	)		(30	)
Asset-backed securities:
Auto loans and leases	—				—			—			(215	)		(215	)
Home equity loans	—				—			—			—			—
Other asset-backed securities	12				(12	)		64			(527	)		(463	)
Total asset-backed securities	12				(12	)		64			(742	)		(678	)
Total debt securities	209				(136	)		86			(1,033	)		(874	)
Marketable equity securities:
Perpetual preferred securities	—				—			—			(20	)		(20	)
Total marketable equity securities	—				—			—			(20	)		(20	)
Total available-for-sale securities	209				(136	)		86			(1,053	)		(894	)
Mortgages held for sale	47				(21	)		—			(72	)		(46	)
Loans	1				—			102			(90	)		13
Mortgage servicing rights (residential)	—				—			289			—			289
Net derivative assets and liabilities:
Interest rate contracts	—				—			—			(264	)		(264	)
Commodity contracts	—				—			—			1			1
Equity contracts	—				(58	)		—			97			39
Foreign exchange contracts	—				—			—			(5	)		(5	)
Credit contracts	—				—			—			96			96
Other derivative contracts	—				—			—			—			—
Total derivative contracts	—				(58	)		—			(75	)		(133	)
Other assets	608				—			—			(8	)		600
Short sale liabilities	(5		)		—			—			—			(5	)
Other liabilities (excluding derivatives)	—				—			—			2			2
The following table provides quantitative information about the valuation techniques and significant unobservable inputs used in the valuation of substantially all of our Level 3 assets and liabilities measured at fair value on a recurring basis for which we use an internal model.
The significant unobservable inputs for Level 3 assets and liabilities that are valued using fair values obtained from third party vendors are not included in the table, as the specific inputs applied are not provided by the vendor. In addition, the table excludes the valuation techniques and significant unobservable inputs for certain classes of Level 3 assets and liabilities measured using an internal model that we consider, both individually and in the aggregate, insignificant relative to our overall Level 3 assets and liabilities. We made this determination based upon an evaluation of each class, which considered the magnitude of the positions, nature of the unobservable inputs and potential for significant changes in fair value due to changes in those inputs. For information on how changes in significant unobservable inputs affect the fair values of Level 3 assets and liabilities, see Note 17 (Fair Values of Assets and Liabilities) to Financial Statements in our 2014 Form 10-K.
($ in millions, except cost to service amounts)	Fair Value				Valuation Technique(s)		Significant		Range of						Weighted
	Level 3						Unobservable Input		Inputs						Average (1)
March 31, 2015
Trading and available-for-sale securities:
Securities of U.S. states and
political subdivisions:
Government, healthcare and	$	1,634			Discounted cash flow		Discount rate		0.5			-	5.8		%	1.7
other revenue bonds
	59				Vendor priced
Auction rate securities and other	293				Discounted cash flow		Discount rate		2			-	7.6			4
municipal bonds
							Weighted average life		1.8			-	19.3		yrs	7.6
Collateralized loan and other debt	462				Market comparable pricing		Comparability adjustment		(53.3		)	-	18.7		%	2.8
obligations (2)
	972				Vendor priced
Asset-backed securities:
Auto loans and leases	249				Discounted cash flow		Discount rate		(0.3		)	-	(0.3	)		(0.3	)
Other asset-backed securities:
Diversified payment rights (3)	617				Discounted cash flow		Discount rate		1			-	6.4			2.8
Other commercial and consumer	632			-4	Discounted cash flow		Discount rate		1.8			-	16.3			5.6
							Weighted average life		1.5			-	9.6		yrs	4.7
	38				Vendor priced
Marketable equity securities:	640			-5	Discounted cash flow		Discount rate		4			-	9		%	6.3
perpetual preferred
							Weighted average life		1			-	11.6		yrs	9.7
Mortgages held for sale (residential)	2,024				Discounted cash flow		Default rate		0.6			-	15		%	2.4
							Discount rate		1.1			-	6.2			5
							Loss severity		0.1			-	26.5			18.1
							Prepayment rate		2			-	18.6			9.8
	74				Market comparable pricing		Comparability adjustment		(93.2		)	-	9.6			(31.2	)
Loans	5,730			-6	Discounted cash flow		Discount rate		0			-	3.6			3
							Prepayment rate		0.4			-	100			12.2
							Utilization rate		0			-	1			0.4
Mortgage servicing rights (residential)	11,739				Discounted cash flow		Cost to service per loan (7)		$	86		-	662			174
							Discount rate		5.3			-	17.4		%	7.4
							Prepayment rate (8)		8.3			-	24.6			13.2
Net derivative assets and (liabilities):
Interest rate contracts	238				Discounted cash flow		Default rate		0			-	0.05			0.02
							Loss severity		50			-	50			50
Interest rate contracts: derivative loan	200				Discounted cash flow		Fall-out factor		1			-	99			24.2
commitments
							Initial-value servicing		(30.3		)	-	110.7		bps	44.8
Equity contracts	110				Discounted cash flow		Conversion factor		(11.2		)	-	0		%	(7.6	)
							Weighted average life		0.8			-	2.8		yrs	1.1
	(296		)		Option model		Correlation factor		(50.0		)	-	96.9		%	59
							Volatility factor		8.3			-	100			28.1
Credit contracts	(157		)		Market comparable pricing		Comparability adjustment		(28.7		)	-	34.6			1.7
	3				Option model		Credit spread		0			-	15.2			0.8
							Loss severity		11.5			-	72.5			50.1
Other assets: nonmarketable equity investments	2,549				Market comparable pricing		Comparability adjustment		(22.0		)	-	(4.8	)		(13.3	)
Insignificant Level 3 assets, net of liabilities	504			-9
Total level 3 assets, net of liabilities	$	28,314		-10
-1	Weighted averages are calculated using outstanding unpaid principal balance for cash instruments such as loans and securities, and notional amounts for derivative instruments.
-2	Includes $487 million of collateralized debt obligations.
-3	Securities backed by specified sources of current and future receivables generated from foreign originators.
-4	Consists primarily of investments in asset-backed securities that are revolving in nature, in which the timing of advances and repayments of principal are uncertain.
-5	Consists of auction rate preferred equity securities with no maturity date that are callable by the issuer.
-6	Consists predominantly of reverse mortgage loans securitized with GNMA that were accounted for as secured borrowing transactions.
-7	The high end of the range of inputs is for servicing modified loans. For non-modified loans the range is $86 - $302.
-8	Includes a blend of prepayment speeds and expected defaults. Prepayment speeds are influenced by mortgage interest rates as well as our estimation of drivers of borrower behavior.
-9	Represents the aggregate amount of Level 3 assets and liabilities measured at fair value on a recurring basis that are individually and in the aggregate insignificant. The amount includes corporate debt securities, mortgage-backed securities, other marketable equity securities, certain other assets, other liabilities and certain net derivative assets and liabilities, such as commodity contracts, foreign exchange contracts and other derivative contracts.
-10	Consists of total Level 3 assets of $30.4 billion and total Level 3 liabilities of $2.1 billion, before netting of derivative balances.
($ in millions, except cost to service amounts)	Fair Value				Valuation Technique(s)		Significant		Range of						Weighted
	Level 3						Unobservable Input		Inputs						Average (1)
31-Dec-14
Trading and available-for-sale securities:
Securities of U.S. states and
political subdivisions:
Government, healthcare and	$	1,900			Discounted cash flow		Discount rate		0.4			-	5.6		%	1.5
other revenue bonds
	61				Vendor priced
Auction rate securities and other	323				Discounted cash flow		Discount rate		1.5			-	7.6			3.9
municipal bonds
							Weighted average life		1.3			-	19.4		yrs	6.4
Collateralized loan and other debt	565				Market comparable pricing		Comparability adjustment		(53.9		)	-	25		%	0.9
obligations (2)
	967				Vendor priced
Asset-backed securities:
Auto loans and leases	245				Discounted cash flow		Discount rate		0.4			-	0.4			0.4
Other asset-backed securities:
Diversified payment rights (3)	661				Discounted cash flow		Discount rate		0.9			-	7.1			2.9
Other commercial and consumer	750			-4	Discounted cash flow		Discount rate		1.9			-	21.5			5
							Weighted average life		1.6			-	10.7		yrs	4
	40				Vendor priced
Marketable equity securities:	663			-5	Discounted cash flow		Discount rate		4.1			-	9.3		%	6.6
perpetual preferred
							Weighted average life		1			-	11.8		yrs	9.7
Mortgages held for sale (residential)	2,235				Discounted cash flow		Default rate		0.4			-	15		%	2.6
							Discount rate		1.1			-	7.7			5.2
							Loss severity		0.1			-	26.4			18.3
							Prepayment rate		2			-	15.5			8.1
	78				Market comparable pricing		Comparability adjustment		(93.0		)	-	10			(30.0	)
Loans	5,788			-6	Discounted cash flow		Discount rate		0			-	3.8			3.1
							Prepayment rate		0.6			-	100			11.2
							Utilization rate		0			-	1			0.4
Mortgage servicing rights (residential)	12,738				Discounted cash flow		Cost to service per		$	86		-	683			179
							loan (7)
							Discount rate		5.9			-	16.9		%	7.6
							Prepayment rate (8)		8			-	22			12.5
Net derivative assets and (liabilities):
Interest rate contracts	196				Discounted cash flow		Default rate		0			-	0.02			0.01
							Loss severity		50			-	50			50
Interest rate contracts: derivative loan	97				Discounted cash flow		Fall-out factor		1			-	99			24.5
commitments
							Initial-value servicing		(31.1		)	-	113.3		bps	46.5
Equity contracts	162				Discounted cash flow		Conversion factor		(11.2		)	-	0		%	(8.4	)
							Weighted average life		1			-	2		yrs	1.3
	(246		)		Option model		Correlation factor		(56.0		)	-	96.3		%	42.1
							Volatility factor		8.3			-	80.9			28.3
Credit contracts	(192		)		Market comparable pricing		Comparability adjustment		(28.6		)	-	26.3			1.8
	3				Option model		Credit spread		0			-	17			0.9
							Loss severity		11.5			-	72.5			48.7
Other assets: nonmarketable equity investments	2,512				Market comparable pricing		Comparability adjustment		(19.7		)	-	(4.0	)		(14.7	)
Insignificant Level 3 assets, net of liabilities	507			-9
Total level 3 assets, net of liabilities	$	30,054		-10
-1	Weighted averages are calculated using outstanding unpaid principal balance for cash instruments such as loans and securities, and notional amounts for derivative instruments.
-2	Includes $500 million of collateralized debt obligations.
-3	Securities backed by specified sources of current and future receivables generated from foreign originators.
-4	Consists primarily of investments in asset-backed securities that are revolving in nature, in which the timing of advances and repayments of principal are uncertain.
-5	Consists of auction rate preferred equity securities with no maturity date that are callable by the issuer.
-6	Consists predominantly of reverse mortgage loans securitized with GNMA that were accounted for as secured borrowing transactions.
-7	The high end of the range of inputs is for servicing modified loans. For non-modified loans the range is $86 - $270.
-8	Includes a blend of prepayment speeds and expected defaults. Prepayment speeds are influenced by mortgage interest rates as well as our estimation of drivers of borrower behavior.
-9	Represents the aggregate amount of Level 3 assets and liabilities measured at fair value on a recurring basis that are individually and in the aggregate insignificant. The amount includes corporate debt securities, mortgage-backed securities, asset-backed securities backed by home equity loans, other marketable equity securities, certain other assets, other liabilities and certain net derivative assets and liabilities, such as commodity contracts, foreign exchange contracts and other derivative contracts.
-10	Consists of total Level 3 assets of $32.3 billion and total Level 3 liabilities of $2.3 billion, before netting of derivative balances.
The valuation techniques used for our Level 3 assets and liabilities, as presented in the previous tables, are described as follows:
•	Discounted cash flow - Discounted cash flow valuation techniques generally consist of developing an estimate of future cash flows that are expected to occur over the life of an instrument and then discounting those cash flows at a rate of return that results in the fair value amount.
•	Market comparable pricing - Market comparable pricing valuation techniques are used to determine the fair value of certain instruments by incorporating known inputs, such as recent transaction prices, pending transactions, or prices of other similar investments that require significant adjustment to reflect differences in instrument characteristics.
•	Option model - Option model valuation techniques are generally used for instruments in which the holder has a contingent right or obligation based on the occurrence of a future event, such as the price of a referenced asset going above or below a predetermined strike price. Option models estimate the likelihood of the specified event occurring by incorporating assumptions such as volatility estimates, price of the underlying instrument and expected rate of return.
•
•	Vendor-priced  – Prices obtained from third party pricing vendors or brokers that are used to record the fair value of the asset or liability, of which the related valuation technique and significant unobservable inputs are not provided.
Significant unobservable inputs presented in the previous table are those we consider significant to the fair value of the Level 3 asset or liability. We consider unobservable inputs to be significant, if by their exclusion, the fair value of the Level 3 asset or liability would be impacted by a predetermined percentage change or based on qualitative factors, such as nature of the instrument, type of valuation technique used, and the significance of the unobservable inputs relative to other inputs used within the valuation. Following is a description of the significant unobservable inputs provided in the table.
•	Comparability adjustment – is an adjustment made to observed market data, such as a transaction price in order to reflect dissimilarities in underlying collateral, issuer, rating, or other factors used within a market valuation approach, expressed as a percentage of an observed price.
•	Conversion Factor – is the risk-adjusted rate in which a particular instrument may be exchanged for another instrument upon settlement, expressed as a percentage change from a specified rate.
•	Correlation factor - is the likelihood of one instrument changing in price relative to another based on an established relationship expressed as a percentage of relative change in price over a period over time.
•	Cost to service - is the expected cost per loan of servicing a portfolio of loans, which includes estimates for unreimbursed expenses (including delinquency and foreclosure costs) that may occur as a result of servicing such loan portfolios.
•	Credit spread – is the portion of the interest rate in excess of a benchmark interest rate, such as OIS, LIBOR or U.S. Treasury rates, that when applied to an investment captures changes in the obligor’s creditworthiness.
•	Default rate – is an estimate of the likelihood of not collecting contractual amounts owed expressed as a constant default rate (CDR).
•	Discount rate – is a rate of return used to present value the future expected cash flow to arrive at the fair value of an instrument. The discount rate consists of a benchmark rate component and a risk premium component. The benchmark rate component, for example, OIS, LIBOR or U.S. Treasury rates, is generally observable within the market and is necessary to appropriately reflect the time value of money. The risk premium component reflects the amount of compensation market participants require due to the uncertainty inherent in the instruments’ cash flows resulting from risks such as credit and liquidity.
•	Fall-out factor - is the expected percentage of loans associated with our interest rate lock commitment portfolio that are likely of not funding.
•	Initial-value servicing - is the estimated value of the underlying loan, including the value attributable to the embedded servicing right, expressed in basis points of outstanding unpaid principal balance.
•	Loss severity – is the percentage of contractual cash flows lost in the event of a default.
•	Prepayment rate – is the estimated rate at which forecasted prepayments of principal of the related loan or debt instrument are expected to occur, expressed as a constant prepayment rate (CPR).
•	Utilization rate – is the estimated rate in which incremental portions of existing reverse mortgage credit lines are expected to be drawn by borrowers, expressed as an annualized rate.
•	Volatility factor – is the extent of change in price an item is estimated to fluctuate over a specified period of time expressed as a percentage of relative change in price over a period over time.
•	Weighted average life – is the weighted average number of years an investment is expected to remain outstanding based on its expected cash flows reflecting the estimated date the issuer will call or extend the maturity of the instrument or otherwise reflecting an estimate of the timing of an instrument’s cash flows whose timing is not contractually fixed.
Assets and Liabilities Recorded at Fair Value on a Nonrecurring Basis
We may be required, from time to time, to measure certain assets at fair value on a nonrecurring basis in accordance with GAAP. These adjustments to fair value usually result from application of LOCOM accounting or write-downs of individual assets. The following table provides the fair value hierarchy and carrying amount of all assets that were still held as of March 31, 2015, and December 31, 2014, and for which a nonrecurring fair value adjustment was recorded during the periods presented.
	March 31, 2015													December 31, 2014
(in millions)	Level 1				Level 2			Level 3			Total			Level 1		Level 2		Level 3		Total
Mortgages held for sale (LOCOM) (1)	$	—			2,070			986			3,056			—		2,197		1,098		3,295
Loans:
Commercial	—				115			—			115			—		243		—		243
Consumer	—				537			7			544			—		2,018		5		2,023
Total loans (2)	—				652			7			659			—		2,261		5		2,266
Other assets (3)	—				186			113			299			—		417		460		877
-1	Mostly real estate 1-4 family first mortgage loans.
-2	Represents carrying value of loans for which adjustments are based on the appraised value of the collateral.
-3	Includes the fair value of foreclosed real estate, other collateral owned and nonmarketable equity investments.
The following table presents the increase (decrease) in value of certain assets for which a nonrecurring fair value adjustment has been recognized during the periods presented.
	Quarter ended Mar 31,
(in millions)	2015				2014
Mortgages held for sale (LOCOM)	$	31			46
Loans:
Commercial	(35		)		(36	)
Consumer	(341		)		(468	)
Total loans (1)	(376		)		(504	)
Other assets (2)	(61		)		—
Total	$	(406	)		(458	)
-1	Represents write-downs of loans based on the appraised value of the collateral.
-2	Includes the losses on foreclosed real estate and other collateral owned that were measured at fair value subsequent to their initial classification as foreclosed assets. Also includes impairment losses on nonmarketable equity investments.
The table below provides quantitative information about the valuation techniques and significant unobservable inputs used in the valuation of substantially all of our Level 3 assets and liabilities that are measured at fair value on a nonrecurring basis using an internal model. The table is limited to financial instruments that had nonrecurring fair value adjustments during the periods presented.
We have excluded from the table classes of Level 3 assets and liabilities measured using an internal model that we consider, both individually and in the aggregate, insignificant relative to our overall Level 3 nonrecurring measurements. We made this determination based upon an evaluation of each class which considered the magnitude of the positions, nature of the unobservable inputs and potential for significant changes in fair value due to changes in those inputs.
($ in millions)	Fair Value				Valuation Technique(s) (1)		Significant		Range of inputs					Weighted
	Level 3						Unobservable Inputs (1)							Average (2)
March 31, 2015
Residential mortgages held for sale (LOCOM)	$	986		-3	Discounted cash flow		Default rate	-5	0.2	—	3.7	%		2.6	%
							Discount rate		1.5	—	8.5			3.5
							Loss severity		1.2	—	37.8			3.8
							Prepayment rate	-6	2	—	100			59.6
Insignificant level 3 assets	120
Total	$	1,106
December 31, 2014
Residential mortgages held for sale (LOCOM)	$	1,098		-3	Discounted cash flow		Default rate	-5	0.9	—	3.8	%		2.1	%
							Discount rate		1.5	—	8.5			3.6
							Loss severity		0	—	29.8			3.8
							Prepayment rate	-6	2	—	100			65.5
Other assets: private equity fund investments (4)	171				Market comparable pricing		Comparability adjustment		6	—	6			6
Insignificant level 3 assets	294
Total	$	1,563
-1	Refer to the narrative following the recurring quantitative Level 3 table of this Note for a definition of the valuation technique(s) and significant unobservable inputs.
-2	For residential MHFS, weighted averages are calculated using outstanding unpaid principal balance of the loans.
-3	Consists of approximately $926 million and $1.0 billion government insured/guaranteed loans purchased from GNMA-guaranteed mortgage securitizations, at March 31, 2015 and December 31, 2014, respectively and $60 million and $78 million of other mortgage loans which are not government insured/guaranteed at March 31, 2015 and December 31, 2014, respectively.
-4	Represents a single investment. For additional information, see the “Alternative Investments” section in this Note.
-5	Applies only to non-government insured/guaranteed loans.
-6	Includes the impact on prepayment rate of expected defaults for the government insured/guaranteed loans, which affects the frequency and timing of early resolution of loans.
Alternative Investments
The following table summarizes our investments in various types of funds for which we use net asset values (NAVs) per share as a practical expedient to measure fair value on recurring and nonrecurring bases. The investments are included in trading assets, available-for-sale securities, and other assets. The table excludes those investments that are probable of being sold at an amount different from the funds’ NAVs.
(in millions)	Fair				Unfunded			Redemption		Redemption
	value				commitments			frequency		notice
										period
31-Mar-15
Offshore funds	$	60			—			Daily - Quarterly		1 - 60 days
Hedge funds	1				—			Daily - Quarterly		1-90 days
Private equity funds (1)(2)	1,235				236			N/A		N/A
Venture capital funds (2)	68				9			N/A		N/A
Total (3)	$	1,364			245
31-Dec-14
Offshore funds	$	125			—			Daily - Quarterly		1 - 60 days
Hedge funds	1				—			Daily - Quarterly		1-90 days
Private equity funds (1)(2)	1,313				243			N/A		N/A
Venture capital funds (2)	68				9			N/A		N/A
Total (3)	$	1,507			252
N/A - Not applicable
-1	Excludes a private equity fund investment of $172 million and $171 million at March 31, 2015, and December 31, 2014, respectively. This investment was sold in April 2015 for an amount different from the fund’s NAV.
-2	Includes certain investments subject to the Volcker Rule that we may have to divest.
-3	March 31, 2015, and December 31, 2014, each include $1.3 billion of fair value for nonmarketable equity investments carried at cost for which we use NAVs as a practical expedient to determine nonrecurring fair value adjustments. The fair values of investments that had nonrecurring fair value adjustments were $75 million and $108 million at March 31, 2015, and December 31, 2014, respectively.
Offshore funds primarily invest in foreign mutual funds. Redemption restrictions are in place for these investments with a fair value of $24 million at both March 31, 2015, and December 31, 2014, due to lock-up provisions that will remain in effect until February 2016.
Private equity funds invest in equity and debt securities issued by private and publicly-held companies in connection with leveraged buyouts, recapitalizations and expansion opportunities. These investments do not allow redemptions. Alternatively, we receive distributions as the underlying assets of the funds liquidate, which we expect to occur over the next 6 years.
Venture capital funds invest in domestic and foreign companies in a variety of industries, including information technology, financial services and healthcare. These investments can never be redeemed with the funds. Instead, we receive distributions as the underlying assets of the fund liquidate, which we expect to occur over the next 5 years.
Fair Value Option
The fair value option is an irrevocable election, generally only permitted upon initial recognition of financial assets or liabilities, to measure eligible financial instruments at fair value with changes in fair value reflected in earnings. We may elect the fair value option to align the measurement model with how the financial assets or liabilities are managed or to reduce complexity or accounting asymmetry. For more information, including the basis for our fair value option elections, see Note 17 (Fair Values of Assets and Liabilities) to Financial Statements in our 2014 Form 10-K.
The following table reflects differences between the fair value carrying amount of certain assets and liabilities for which we have elected the fair value option and the contractual aggregate unpaid principal amount at maturity.
	March 31, 2015										December 31, 2014
(in millions)	Fair value				Aggregate			Fair value			Fair value			Aggregate		Fair value
	carrying				unpaid			carrying			carrying			unpaid		carrying
	amount				principal			amount			amount			principal		amount
								less								less
								aggregate								aggregate
								unpaid								unpaid
								principal								principal
Trading assets - loans:
Total loans	$	1,110			1,132			(22	)		1,387			1,410		(23	)
Nonaccrual loans	—				—			—			—			1		(1	)
Mortgages held for sale:
Total loans	19,015				18,551			464			15,565			15,246		319
Nonaccrual loans	129				213			(84	)		160			252		(92	)
Loans 90 days or more past due and still accruing	26				29			(3	)		27			30		(3	)
Loans held for sale:
Total loans	1				10			(9	)		1			10		(9	)
Nonaccrual loans	1				10			(9	)		1			10		(9	)
Loans:
Total loans	5,730				5,475			255			5,788			5,527		261
Nonaccrual loans	431				442			(11	)		367			376		(9	)
Other assets (1)	2,549				n/a			n/a			2,512			n/a		n/a
-1	Consists of nonmarketable equity investments carried at fair value. See Note 6 (Other Assets) for more information.
The assets and liabilities accounted for under the fair value option are initially measured at fair value. Gains and losses from initial measurement and subsequent changes in fair value are recognized in earnings. The changes in fair value related to initial measurement and subsequent changes in fair value included in earnings for these assets and liabilities measured at fair value are shown below by income statement line item.
	2015										2014
(in millions)	Mortgage banking noninterest income				Net gains			Other			Mortgage			Net gains		Other
					(losses)			noninterest			banking			(losses)		noninterest
					from			income			noninterest			from		income
					trading						income			trading
					activities									activities
Quarter ended March 31,
Trading assets - loans	$	—			15			1			—			12		—
Mortgages held for sale	581				—			—			506			—		—
Loans	—				—			(4	)		—			—		—
Other assets	—				—			38			—			—		(61	)
Other interests held (1)	—				—			—			—			(1	)	(1	)
-1	Consists of retained interests in securitizations and changes in fair value of letters of credit.
For performing loans, instrument-specific credit risk gains or losses were derived principally by determining the change in fair value of the loans due to changes in the observable or implied credit spread. Credit spread is the market yield on the loans less the relevant risk-free benchmark interest rate. For nonperforming loans, we attribute all changes in fair value to instrument-specific credit risk. The following table shows the estimated gains and losses from earnings attributable to instrument-specific credit risk related to assets accounted for under the fair value option.
	Quarter ended March 31,
(in millions)	2015				2014
Gains (losses) attributable to instrument-specific credit risk:
Trading assets - loans	$	15			12
Mortgages held for sale	17				10
Total	$	32			22
Disclosures about Fair Value of Financial Instruments
The table below is a summary of fair value estimates for financial instruments, excluding financial instruments recorded at fair value on a recurring basis, which are included within the Assets and Liabilities Recorded at Fair Value on a Recurring Basis table included earlier in this Note. The carrying amounts in the following table are recorded on the balance sheet under the indicated captions, except for nonmarketable equity investments, which are included in Other Assets.
We have not included assets and liabilities that are not financial instruments in our disclosure, such as the value of the long-term relationships with our deposit, credit card and trust customers, amortized MSRs, premises and equipment, goodwill and other intangibles, deferred taxes and other liabilities. The total of the fair value calculations presented does not represent, and should not be construed to represent, the underlying value of the Company.
					Estimated fair value
(in millions)	Carrying amount				Level 1			Level 2			Level 3			Total
March 31, 2015
Financial assets
Cash and due from banks (1)	$	19,793			19,793			—			—			19,793
Federal funds sold, securities purchased under resale agreements and other short-term investments (1)	291,317				7,100			284,217			—			291,317
Held-to-maturity securities	67,133				45,676			17,996			5,109			68,781
Mortgages held for sale (2)	4,591				—			3,608			986			4,594
Loans held for sale (2)	680				—			697			—			697
Loans, net (3)	831,427				—			60,086			784,517			844,603
Nonmarketable equity investments (cost method)	6,912				—			—			8,599			8,599
Financial liabilities
Deposits	1,196,663				—			1,163,086			33,653			1,196,739
Short-term borrowings (1)	77,697				—			77,697			—			77,697
Long-term debt (4)	183,283				—			175,239			9,787			185,026
December 31, 2014
Financial assets
Cash and due from banks (1)	$	19,571			19,571			—			—			19,571
Federal funds sold, securities purchased under resale agreements and other short-term investments (1)	258,429				8,991			249,438			—			258,429
Held-to-maturity securities	55,483				41,548			9,021			5,790			56,359
Mortgages held for sale (2)	3,971				—			2,875			1,098			3,973
Loans held for sale (2)	721				—			739			—			739
Loans, net (3)	832,671				—			60,052			784,786			844,838
Nonmarketable equity investments (cost method)	7,033				—			—			8,377			8,377
Financial liabilities
Deposits	1,168,310				—			1,132,845			35,566			1,168,411
Short-term borrowings (1)	63,518				—			63,518			—			63,518
Long-term debt (4)	183,934				—			174,996			10,479			185,475
-1	Amounts consist of financial instruments in which carrying value approximates fair value.
-2	Balance reflects MHFS and LHFS, as applicable, other than those MHFS and LHFS for which we elected the fair value option.
-3	Loans exclude balances for which the fair value option was elected and also exclude lease financing with a carrying amount of $12.4 billion and $12.3 billion at March 31, 2015 and December 31, 2014, respectively.
-4	The carrying amount and fair value exclude obligations under capital leases of $9 million at both March 31, 2015 and December 31, 2014.
Loan commitments, standby letters of credit and commercial and similar letters of credit are not included in the table above. A reasonable estimate of the fair value of these instruments is the carrying value of deferred fees plus the related allowance, which totaled $940 million and $945 million at March 31, 2015 and December 31, 2014, respectively.

Preferred_Stock

Preferred Stock	3 Months Ended
	Mar. 31, 2015
Preferred Stock [Abstract]
Preferred Stock
	Note 14:  Preferred Stock
	We are authorized to issue 20 million shares of preferred stock and 4 million shares of preference stock, both without par value. Preferred shares outstanding rank senior to common shares both as to dividends and liquidation preference but have no general voting rights. We have not issued any preference shares under this authorization. If issued, preference shares would be limited to one vote per share. Our total authorized, issued and outstanding preferred stock is presented in the following two tables along with the Employee Stock Ownership Plan (ESOP) Cumulative Convertible Preferred Stock.
		31-Mar-15					31-Dec-14
		Liquidation			Shares		Liquidation			Shares
		preference			authorized		preference			authorized
		per share			and designated		per share			and designated
	DEP Shares
	Dividend Equalization Preferred Shares (DEP)	$	10		97,000		$	10		97,000
	Series G
	7.25% Class A Preferred Stock	15,000			50,000		15,000			50,000
	Series H
	Floating Class A Preferred Stock	20,000			50,000		20,000			50,000
	Series I
	Floating Class A Preferred Stock	100,000			25,010		100,000			25,010
	Series J
	8.00% Non-Cumulative Perpetual Class A Preferred Stock	1,000			2,300,000		1,000			2,300,000
	Series K
	7.98% Fixed-to-Floating Non-Cumulative Perpetual Class A Preferred Stock	1,000			3,500,000		1,000			3,500,000
	Series L
	7.50% Non-Cumulative Perpetual Convertible Class A Preferred Stock	1,000			4,025,000		1,000			4,025,000
	Series N
	5.20% Non-Cumulative Perpetual Class A Preferred Stock	25,000			30,000		25,000			30,000
	Series O
	5.125% Non-Cumulative Perpetual Class A Preferred Stock	25,000			27,600		25,000			27,600
	Series P
	5.25% Non-Cumulative Perpetual Class A Preferred Stock	25,000			26,400		25,000			26,400
	Series Q
	5.85% Fixed-to-Floating Non-Cumulative Perpetual Class A Preferred Stock	25,000			69,000		25,000			69,000
	Series R
	6.625% Fixed-to-Floating Non-Cumulative Perpetual Class A Preferred Stock	25,000			34,500		25,000			34,500
	Series S
	5.900% Fixed-to-Floating Non-Cumulative Perpetual Class A Preferred Stock	25,000			80,000		25,000			80,000
	Series T
	6.00% Non-Cumulative Perpetual Class A Preferred Stock	25,000			32,200		25,000			32,200
	Series U
	5.875% Fixed-to-Floating Non-Cumulative Perpetual Class A Preferred Stock	25,000			80,000		—			—
	ESOP
	Cumulative Convertible Preferred Stock (1)	—			2,036,572		—			1,251,287
	Total				12,463,282					11,597,997
	-1	See the ESOP Cumulative Convertible Preferred Stock section of this Note for additional information about the liquidation preference for the ESOP Cumulative Convertible Preferred Stock.
		31-Mar-15									31-Dec-14
	(in millions, except shares)	Shares		Par			Carrying		Discount		Shares		Par		Carrying	Discount
		issued and		value			value				issued and		value		value
		outstanding									outstanding
	DEP Shares
	Dividend Equalization Preferred Shares (DEP)	96,546		$	—		—		—		96,546		$	—	—	—
	Series I (1)
	Floating Class A Preferred Stock	25,010		2,501			2,501		—		25,010		2,501		2,501	—
	Series J (1)
	8.00% Non-Cumulative Perpetual Class A Preferred Stock	2,150,375		2,150			1,995		155		2,150,375		2,150		1,995	155
	Series K (1)
	7.98% Fixed-to-Floating Non-Cumulative Perpetual Class A Preferred Stock	3,352,000		3,352			2,876		476		3,352,000		3,352		2,876	476
	Series L (1)
	7.50% Non-Cumulative Perpetual Convertible Class A Preferred Stock	3,968,000		3,968			3,200		768		3,968,000		3,968		3,200	768
	Series N (1)
	5.20% Non-Cumulative Perpetual Class A Preferred Stock	30,000		750			750		—		30,000		750		750	—
	Series O (1)
	5.125% Non-Cumulative Perpetual Class A Preferred Stock	26,000		650			650		—		26,000		650		650	—
	Series P (1)
	5.25% Non-Cumulative Perpetual Class A Preferred Stock	25,000		625			625		—		25,000		625		625	—
	Series Q (1)
	5.85% Fixed-to-Floating Non-Cumulative Perpetual Class A Preferred Stock	69,000		1,725			1,725		—		69,000		1,725		1,725	—
	Series R (1)
6.625% Fixed-to-Floating Non-Cumulative Perpetual Class A Preferred Stock	33,600		840			840		—		33,600		840		840	—
Series S (1)
5.900% Fixed-to-Floating Non-Cumulative Perpetual Class A Preferred Stock	80,000		2,000			2,000		—		80,000		2,000		2,000	—
Series T (1)
6.000% Non-Cumulative Perpetual Class A Preferred Stock	32,000		800			800		—		32,000		800		800	—
Series U (1)
5.875% Fixed-to-Floating Non-Cumulative Perpetual Class A Preferred Stock	80,000		2,000			2,000		—		—		—		—	—
ESOP
Cumulative Convertible Preferred Stock	2,036,572		2,036			2,036		—		1,251,287		1,251		1,251	—
Total	12,004,103		$	23,397		21,998		1,399		11,138,818		$	20,612	19,213	1,399
-1	Preferred shares qualify as Tier 1 capital.
In January 2015, we issued 2 million Depositary Shares, each representing a 1/25th interest in a share of Non-Cumulative Perpetual Class A Preferred Stock, Series U, for an aggregate public offering price of $2.0 billion.
See Note 7 (Securitizations and Variable Interest Entities) for additional information on our trust preferred securities. We do not have a commitment to issue Series G or H preferred stock.
ESOP Cumulative Convertible Preferred Stock  All shares of our ESOP Cumulative Convertible Preferred Stock (ESOP Preferred Stock) were issued to a trustee acting on behalf of the Wells Fargo & Company 401(k) Plan (the 401(k) Plan). Dividends on the ESOP Preferred Stock are cumulative from the date of initial issuance and are payable quarterly at annual rates based upon the year of issuance. Each share of ESOP Preferred Stock released from the unallocated reserve of the 401(k) Plan is converted into shares of our common stock based on the stated value of the ESOP Preferred Stock and the then current market price of our common stock. The ESOP Preferred Stock is also convertible at the option of the holder at any time, unless previously redeemed. We have the option to redeem the ESOP Preferred Stock at any time, in whole or in part, at a redemption price per share equal to the higher of (a) $1,000 per share plus accrued and unpaid dividends or (b) the fair market value, as defined in the Certificates of Designation for the ESOP Preferred Stock.
	Shares issued and outstanding				Carrying value
	Mar. 31,		Dec. 31,		Mar. 31,			Dec. 31,		Adjustable dividend rate
(in millions, except shares)	2015		2014		2015			2014		Minimum		Maximum
ESOP Preferred Stock
$1,000 liquidation preference per share
2015	826,598		—		$	826		—		8.9	%	9.9
2014	320,019		352,158		320			352		8.7		9.7
2013	278,826		288,000		279			288		8.5		9.5
2012	189,204		189,204		189			189		10		11
2011	205,263		205,263		205			205		9		10
2010	141,011		141,011		141			141		9.5		10.5
2008	42,204		42,204		42			42		10.5		11.5
2007	24,728		24,728		25			25		10.75		11.75
2006	8,719		8,719		9			9		10.75		11.75
Total ESOP Preferred Stock (1)	2,036,572		1,251,287		$	2,036		1,251
Unearned ESOP shares (2)					$	(2,215	)	(1,360	)
-1	At March 31, 2015 and December 31, 2014, additional paid-in capital included $179 million and $109 million, respectively, related to ESOP preferred stock.
-2	We recorded a corresponding charge to unearned ESOP shares in connection with the issuance of the ESOP Preferred Stock. The unearned ESOP shares are reduced as shares of the ESOP Preferred Stock are committed to be released.

Employee_Benefits

Employee Benefits	3 Months Ended
	Mar. 31, 2015
Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]
Employee Benefits
	Note 15: Employee Benefits
	We sponsor a frozen noncontributory qualified defined benefit retirement plan called the Wells Fargo & Company Cash Balance Plan (Cash Balance Plan), which covers eligible employees of Wells Fargo. The Cash Balance Plan was frozen on July 1, 2009, and no new benefits accrue after that date.
	The net periodic benefit cost was:
		2015						2014
		Pension benefits						Pension benefits
	(in millions)	Qualified			Non-qualified	Other		Qualified		Non-qualified	Other
						benefits					benefits
	Quarter ended March 31,
	Service cost	$	—		—	2		—		—	2
	Interest cost	107			6	11		116		6	11
	Expected return on plan assets	(161		)	—	(9	)	(157	)	—	(9	)
	Amortization of net actuarial loss (gain)	27			5	(1	)	23		3	(7	)
	Amortization of prior service credit	—			—	(1	)	—		—	(1	)
	Settlement loss	—			13	—		—		—	—
	Net periodic benefit cost (income)	$	(27	)	24	2		(18	)	9	(4	)

Earnings_Per_Common_Share

Earnings Per Common Share	3 Months Ended
	Mar. 31, 2015
Earnings Per Share [Abstract]
Earnings Per Common Share
	Note 16:  Earnings Per Common Share
	The table below shows earnings per common share and diluted earnings per common share and reconciles the numerator and denominator of both earnings per common share calculations. See Note 1 (Summary of Significant Accounting Policies) for discussion of private share repurchases and the Consolidated Statement of Changes in Equity.
		Quarter ended March 31,
	(in millions, except per share amounts)	2015			2014
	Wells Fargo net income	$	5,804		5,893
	Less: Preferred stock dividends and other	343			286
	Wells Fargo net income applicable to common stock (numerator)	$	5,461		5,607
	Earnings per common share
	Average common shares outstanding (denominator)	5,160.40			5,262.80
	Per share	$	1.06		1.07
	Diluted earnings per common share
	Average common shares outstanding	5,160.40			5,262.80
	Add: Stock options	28.8			33.5
	Restricted share rights	40.2			46.5
	Warrants	14.2			10.5
	Diluted average common shares outstanding (denominator)	5,243.60			5,353.30
	Per share	$	1.04		1.05
	The following table presents any outstanding options and warrants to purchase shares of common stock that were anti-dilutive (the exercise price was higher than the weighted-average market price), and therefore not included in the calculation of diluted earnings per common share.
		Weighted-average shares
		Quarter ended March 31,
	(in millions)	2015		2014
	Options	7.1		9.6

Other_Comprehensive_Income

Other Comprehensive Income	3 Months Ended
	Mar. 31, 2015
Cumulative Other Comprehensive Income Balances [Abstract] [Abstract]
Other Comprehensive Income
	Note 17:  Other Comprehensive Income
	The following table provides the components of other comprehensive income (OCI), reclassifications to net income by income statement line item, and the related tax effects.
		Quarter ended March 31,
		2015									2014
	(in millions)	Before			Tax		Net of				Before			Tax		Net of
		tax			effect		tax				tax			effect		tax
	Investment securities:
	Net unrealized gains arising during the period	$	393		(47	)	346				2,725			(993	)	1,732
	Reclassification of net gains to net income:
	Interest income on investment securities (1)	(3		)	1		(2		)		(15	)		6		(9	)
	Net gains on debt securities	(278		)	105		(173		)		(83	)		31		(52	)
	Net gains from equity investments	(19		)	7		(12		)		(296	)		112		(184	)
	Subtotal reclassifications to net income	(300		)	113		(187		)		(394	)		149		(245	)
	Net change	93			66		159				2,331			(844	)	1,487
	Derivatives and hedging activities:
	Net unrealized gains arising during the period	952			(359	)	593				44			(17	)	27
	Reclassification of net (gains) losses to net income:
	Interest income on loans	(237		)	89		(148		)		(124	)		47		(77	)
	Interest expense on long-term debt	4			(1	)	3				18			(7	)	11
	Interest income on investment securities	(1		)	1		—				—			—		—
	Subtotal reclassifications to net income	(234		)	89		(145		)		(106	)		40		(66	)
	Net change	718			(270	)	448				(62	)		23		(39	)
	Defined benefit plans adjustments:
	Net actuarial losses arising during the period	(11		)	4		(7		)		—			—		—
	Reclassification of amounts to net periodic benefit costs (2):
	Amortization of net actuarial loss	31			(12	)	19				19			(7	)	12
	Settlements and other	12			(5	)	7				(1	)		—		(1	)
	Subtotal reclassifications to net periodic benefit costs	43			(17	)	26				18			(7	)	11
	Net change	32			(13	)	19				18			(7	)	11
	Foreign currency translation adjustments:
	Net unrealized losses arising during the period	(55		)	(11	)	(66		)		(17	)		(3	)	(20	)
	Reclassification of net losses to net income:
	Noninterest income	—			—		—				6			—		6
	Net change	(55		)	(11	)	(66		)		(11	)		(3	)	(14	)
	Other comprehensive income	$	788		(228	)	560				2,276			(831	)	1,445
	Less: Other comprehensive income from noncontrolling interests, net of tax						301									79
	Wells Fargo other comprehensive income, net of tax						$	259								1,366
	-1	Represents net unrealized gains amortized over the remaining lives of securities that were transferred from the available-for-sale portfolio to the held-to-maturity portfolio.
	-2	These items are included in the computation of net periodic benefit cost, which is recorded in employee benefits expense (see Note 15 (Employee Benefits) for additional details).
	Cumulative OCI balances were:
	(in millions)	Investment			Derivatives		Defined			Foreign			Cumulative
		securities			and		benefit			currency			other
					hedging		plans			translation			compre-
					activities		adjustments			adjustments			hensive
													income
	Quarter ended March 31, 2015
	Balance, beginning of period	$	4,926		333		(1,703	)		(38	)		3,518
	Net unrealized gains (losses) arising during the period	346			593		(7	)		(66	)		866
	Amounts reclassified from accumulated other comprehensive income	(187		)	(145	)	26			—			(306	)
	Net change	159			448		19			(66	)		560
	Less: Other comprehensive income from noncontrolling interests	301			—		—			—			301
	Balance, end of period	$	4,784		781		(1,684	)		(104	)		3,777
	Quarter ended March 31, 2014
	Balance, beginning of period	$	2,338		80		(1,053	)		21			1,386
	Net unrealized gains (losses) arising during the period	1,732			27		—			(20	)		1,739
	Amounts reclassified from accumulated other comprehensive income	(245		)	(66	)	11			6			(294	)
	Net change	1,487			(39	)	11			(14	)		1,445
	Less: Other comprehensive income from noncontrolling interests	79			—		—			—			79
	Balance, end of period	$	3,746		41		(1,042	)		7			2,752

Operating_Segments

Operating Segments	3 Months Ended
	Mar. 31, 2015
Segment Reporting [Abstract]
Operating Segments
	Note 18:  Operating Segments
	We have three reportable operating segments: Community Banking; Wholesale Banking; and Wealth, Brokerage and Retirement. The results for these operating segments are based on our management accounting process, for which there is no comprehensive, authoritative guidance equivalent to GAAP for financial accounting. The management accounting process measures the performance of the operating segments based on our management structure and is not necessarily comparable with similar information for other financial services companies. We define our operating segments by product type and customer segment. If the management structure and/or the allocation process changes, allocations, transfers and assignments may change. For a description of our operating segments, including the underlying management accounting process, see Note 24 (Operating Segments) to Financial Statements in our 2014 Form 10-K.
		Community			Wholesale				Wealth,				Other (1)				Consolidated
		Banking			Banking				Brokerage								Company
									and
									Retirement
	(income/expense in millions, average balances in billions)	2015		2014	2015		2014		2015		2014		2015		2014		2015	2014
	Quarter ended March 31,
	Net interest income (2)	$	7,561	7,275	2,921		2,891		861		768		(357	)	(319	)	10,986	10,615
	Provision (reversal of provision) for credit losses	617		419	(6	)	(93	)	(3	)	(8	)	—		7		608	325
	Noninterest income	5,223		5,318	2,991		2,689		2,872		2,700		(794	)	(697	)	10,292	10,010
	Noninterest expense	7,064		6,774	3,409		3,215		2,831		2,711		(797	)	(752	)	12,507	11,948
	Income (loss) before income tax expense (benefit)	5,103		5,400	2,509		2,458		905		765		(354	)	(271	)	8,163	8,352
	Income tax expense (benefit)	1,364		1,376	706		714		344		290		(135	)	(103	)	2,279	2,277
	Net income (loss) before noncontrolling interests	3,739		4,024	1,803		1,744		561		475		(219	)	(168	)	5,884	6,075
	Less: Net income (loss) from noncontrolling interests	74		180	6		2		—		—		—		—		80	182
	Net income (loss) (3)	$	3,665	3,844	1,797		1,742		561		475		(219	)	(168	)	5,804	5,893
	Average loans	$	506.4	505	337.6		301.9		56.9		50		(37.6	)	(33.1	)	863.3	823.8
	Average assets	993.1		892.6	594.9		517.4		195.7		190.6		(75.9	)	(74.7	)	1,707.80	1,525.90
	Average core deposits	668.9		626.5	303.4		259		161.4		156		(70.5	)	(67.7	)	1,063.20	973.8
	-1	Includes items not specific to a business segment and elimination of certain items that are included in more than one business segment, substantially all of which represents products and services for wealth management customers provided in Community Banking stores.
	-2	Net interest income is the difference between interest earned on assets and the cost of liabilities to fund those assets. Interest earned includes actual interest earned on segment assets and, if the segment has excess liabilities, interest credits for providing funding to other segments. The cost of liabilities includes interest expense on segment liabilities and, if the segment does not have enough liabilities to fund its assets, a funding charge based on the cost of excess liabilities from another segment.
	-3	Represents segment net income (loss) for Community Banking; Wholesale Banking; and Wealth, Brokerage and Retirement segments and Wells Fargo net income for the consolidated company.

Regulatory_and_Agency_Capital_

Regulatory and Agency Capital Requirements	3 Months Ended
	Mar. 31, 2015
Banking and Thrift [Abstract]
Regulatory and Agency Capital Requirements
	Note 19:  Regulatory and Agency Capital Requirements
	The Company and each of its subsidiary banks are subject to regulatory capital adequacy requirements promulgated by federal bank regulatory agencies. The Federal Reserve establishes capital requirements, including well capitalized standards, for the consolidated financial holding company, and the OCC has similar requirements for the Company’s national banks, including Wells Fargo Bank, N.A. (the Bank).
	The following table presents regulatory capital information for Wells Fargo & Company and the Bank using Basel III, which increased minimum required capital ratios, and introduced a minimum Common Equity Tier 1 (CET1) ratio. Information presented for March 31, 2015, reflects the transition to determining risk-weighted assets (RWAs) under the Basel III Standardized Approach with Transition Requirements from RWAs determined using general risk-based capital rules (General Approach) effective in 2014. The Standardized and General Approaches each apply assigned risk weights to broad risk categories but many of the risk categories and/or weights were changed by Basel III for the Standardized Approach and will generally result in higher risk-weighted assets than from those prescribed for the General Approach. We have been approved by federal banking regulators, starting in second quarter 2015, to use the Advanced Approach capital framework, which involves using our internal risk models to determine RWAs and satisfying specific risk-measurement and risk-management criteria when calculating our risk-based capital requirements. The Basel III revised definition of capital, and changes are being phased-in effective January 1, 2014, through the end of 2021.
	The Bank is an approved seller/servicer of mortgage loans and is required to maintain minimum levels of shareholders’ equity, as specified by various agencies, including the United States Department of Housing and Urban Development, GNMA, FHLMC and FNMA. At March 31, 2015, the Bank met these requirements. Other subsidiaries, including the Company’s insurance and broker-dealer subsidiaries, are also subject to various minimum capital levels, as defined by applicable industry regulations. The minimum capital levels for these subsidiaries, and related restrictions, are not significant to our consolidated operations.
		Wells Fargo & Company				Wells Fargo Bank, N.A.
		Under Basel III				Under Basel III		31-Mar-15
		Standardized			General	Standardized	General	Well-	Minimum
		Approach			Approach	Approach	Approach	capitalized	capital
		Mar 31,			Dec 31,	Mar 31,	Dec 31,	ratios (1)	ratios (1)
	(in billions, except ratios)	2015			2014	2015	2014
	Regulatory capital:
	Common equity tier 1	$	139.2		137.1	121.1	119.9
	Tier 1	158.8			154.7	121.1	119.9
	Total	196.2			192.9	144.9	144
	Assets:
	Risk-weighted	$	1,301.50		1,242.50	1,177.70	1,142.50
	Adjusted average (2)	1,675.70			1,637.00	1,523.00	1,487.60
	Regulatory capital ratios:
	Common equity tier 1 capital	10.69		%	11.04	10.28	10.49	6.5	4.5
	Tier 1 capital	12.2			12.45	10.28	10.49	8	6
	Total capital	15.08			15.53	12.31	12.61	10	8
	Tier 1 leverage (2)	9.48			9.45	7.95	8.06	5	4
	-1	As defined by the regulations issued by the Federal Reserve, OCC and FDIC.
	-2	The leverage ratio consists of Tier 1 capital divided by quarterly average total assets, excluding goodwill and certain other items. The minimum leverage ratio guideline is 3% for banking organizations that do not anticipate significant growth and that have well-diversified risk, excellent asset quality, high liquidity, good earnings, effective management and monitoring of market risk and, in general, are considered top-rated, strong banking organizations.

Summary_of_Significant_Account1

Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2015
Significant Accounting Policies [Line Items]
Nature of Operations	Wells Fargo & Company is a diversified financial services company. We provide banking, insurance, trust and investments, mortgage banking, investment banking, retail banking, brokerage, and consumer and commercial finance through banking stores, the internet and other distribution channels to consumers, businesses and institutions in all 50 states, the District of Columbia, and in foreign countries. When we refer to “Wells Fargo,” “the Company,” “we,” “our” or “us,” we mean Wells Fargo & Company and Subsidiaries (consolidated). Wells Fargo & Company (the Parent) is a financial holding company and a bank holding company. We also hold a majority interest in a real estate investment trust, which has publicly traded preferred stock outstanding.
Use of Estimates	Our accounting and reporting policies conform with U.S. generally accepted accounting principles (GAAP) and practices in the financial services industry. For discussion of our significant accounting policies, see Note 1 (Summary of Significant Accounting Policies) in our Annual Report on Form 10-K for the year ended December 31, 2014 (2014 Form 10-K). There were no material changes to these policies in first quarter 2015. To prepare the financial statements in conformity with GAAP, management must make estimates based on assumptions about future economic and market conditions (for example, unemployment, market liquidity, real estate prices, etc.) that affect the reported amounts of assets and liabilities at the date of the financial statements and income and expenses during the reporting period and the related disclosures. Although our estimates contemplate current conditions and how we expect them to change in the future, it is reasonably possible that actual conditions could be worse than anticipated in those estimates, which could materially affect our results of operations and financial condition. Management has made significant estimates in several areas, including allowance for credit losses and purchased credit-impaired (PCI) loans (Note 5 (Loans and Allowance for Credit Losses)), valuations of residential mortgage servicing rights (MSRs) (Note 7 (Securitizations and Variable Interest Entities) and Note 8 (Mortgage Banking Activities)) and financial instruments (Note 13 (Fair Values of Assets and Liabilities)), and income taxes. Actual results could differ from those estimates.
Comparability of Prior Year Financial Data	These unaudited interim financial statements reflect all adjustments that are, in the opinion of management, necessary for a fair statement of the results for the periods presented. These adjustments are of a normal recurring nature, unless otherwise disclosed in this Form 10-Q. The results of operations in the interim financial statements do not necessarily indicate the results that may be expected for the full year. The interim financial information should be read in conjunction with our 2014 Form 10-K.
Accounting Standards Adopted in 2015	Accounting Standards Adopted in 2015
	In first quarter 2015, we adopted the following new accounting guidance:
	•	Accounting Standards Update (ASU or Update) 2014-11, Transfers and Servicing (Topic 860): Repurchase-to-Maturity Transactions, Repurchase Financings, and Disclosures;
	•	ASU 2014-08, Presentation of Financial Statements (Topic 205) and Property, Plant, and Equipment (Topic 360): Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity; and
	•	ASU 2014-01, Investments - Equity Method and Joint Ventures (Topic 323): Accounting for Investments in Qualified Affordable Housing Projects.
Private Share Repurchases	Private Share Repurchases
	From time to time we enter into private forward repurchase transactions with unrelated third parties to complement our open-market common stock repurchase strategies, to allow us to manage our share repurchases in a manner consistent with our capital plans, currently submitted under the 2015 Comprehensive Capital Analysis and Review (CCAR), and to provide an economic benefit to the Company.
	Our payments to the counterparties for these contracts are recorded in permanent equity in the quarter paid and are not subject to re-measurement. The classification of the up-front payments as permanent equity assures that we have appropriate repurchase timing consistent with our 2015 Capital Plan, which contemplated a fixed dollar amount available per quarter for share repurchases pursuant to Federal Reserve Board (FRB) supervisory guidance. In return, the counterparty agrees to deliver a variable number of shares based on a per share discount to the volume-weighted average stock price over the contract period. There are no scenarios where the contracts would not either physically settle in shares or allow us to choose the settlement method. Our total number of outstanding shares of common stock is not reduced until settlement of the private share repurchase contract.
	In January 2015, we entered into a $750 million private forward repurchase contract with an unrelated third party. This contract settled in April 2015 for 14.0 million shares of common stock. We did not have any unsettled private share repurchase contracts at March 31, 2014.
Subsequent Events	SUBSEQUENT EVENTS  We have evaluated the effects of events that have occurred subsequent to March 31, 2015, and there have been no material events that would require recognition in our first quarter 2015 consolidated financial statements or disclosure in the Notes to the consolidated financial statements.
Accounting Standards Update 2014-11 [Member]
Significant Accounting Policies [Line Items]
Accounting Standards Adopted in 2015	ASU 2014-11 requires repurchase-to-maturity transactions to be accounted for as secured borrowings versus sales. The guidance also requires separate accounting for transfers of financial assets that are executed contemporaneously with repurchase agreements. The Update also includes new disclosures for transfers accounted for as sales and for repurchase agreements and similar arrangements, such as classes of collateral pledged for gross obligations and the remaining contractual maturity of repurchase agreements. We adopted the accounting changes in first quarter 2015 with no impact to our consolidated financial statements or disclosures. The collateral and remaining contractual maturity disclosures for repurchase and similar agreements are required in second quarter 2015.
Accounting Standards Update 2014-08 [Member]
Significant Accounting Policies [Line Items]
Accounting Standards Adopted in 2015	ASU 2014-08 changes the definition and reporting requirements for discontinued operations. Under the new guidance, an entity’s disposal of a component or group of components must be reported in discontinued operations if the disposal is a strategic shift that has or will have a significant effect on the entity’s operations and financial results. We adopted these changes in first quarter 2015 with prospective application. This Update did not have a material impact on our consolidated financial statements.
Accounting Standards Update 2014-01 [Member]
Significant Accounting Policies [Line Items]
Accounting Standards Adopted in 2015	ASU 2014-01 amends the accounting guidance for investments in affordable housing projects that qualify for the low-income housing tax credits. The Update requires incremental disclosures for all entities that invest in qualified affordable housing projects. Additionally companies may make an accounting election to amortize the cost of their investments in proportion to the tax benefits received if certain criteria are met and present the amortization as a component of income tax expense. We adopted the new disclosure requirements in first quarter 2015 (see Note 6 (Other Assets)) and will continue our previous accounting for these investments rather than make the alternative election to amortize the initial cost of the investments in proportion to the tax benefits received.

Summary_of_Significant_Account2

Summary of Significant Accounting Policies (Tables)	3 Months Ended
	Mar. 31, 2015
Accounting Policies [Abstract]
Supplemental Cash Flow Information	Significant noncash activities are presented below.
		Quarter ended March 31,
	(in millions)	2015		2014
	Trading assets retained from securitization of MHFS	$	6,874	5,348
	Transfers from loans to MHFS	2,202		2,602
	Transfers from loans to foreclosed and other assets	911		1,216
	Transfers from available-for-sale to held-to-maturity securities	4,972		—

Federal_Funds_Sold_Securities_1

Federal Funds Sold, Securities Purchased under Resale Agreements and Other Short-Term Investments (Tables)	3 Months Ended
	Mar. 31, 2015
Federal Funds Sold, Securities Purchased under Resale Agreements and Other Short-Term Investments [Abstract]
Federal Funds Sold, Securities Purchased under Resale Agreements and Other Short-Term Investments	The following table provides the detail of federal funds sold, securities purchased under short-term resale agreements (generally less than one year) and other short-term investments. The majority of interest-earning deposits at March 31, 2015 and December 31, 2014 , were held at the Federal Reserve.
	(in millions)	Mar 31,		Dec 31
		2015		2014
	Federal funds sold and securities purchased under resale agreements	$	40,161	36,856
	Interest-earning deposits	250,354		219,220
	Other short-term investments	802		2,353
	Total	$	291,317	258,429

Investment_Securities_Tables

Investment Securities (Tables)	3 Months Ended
	Mar. 31, 2015
Investments, Debt and Equity Securities [Abstract]
Investment Securities Major Categories	The following table provides the amortized cost and fair value by major categories of available-for-sale securities, which are carried at fair value, and held-to-maturity debt securities, which are carried at amortized cost. The net unrealized gains (losses) for available-for-sale securities are reported on an after-tax basis as a component of cumulative OCI.
	(in millions)	Amortized Cost			Gross		Gross			Fair
					unrealized		unrealized			value
					gains		losses
	March 31, 2015
	Available-for-sale securities:
	Securities of U.S. Treasury and federal agencies	$	29,782		282		(33	)		30,031
	Securities of U.S. states and political subdivisions	46,973			1,342		(935	)		47,380
	Mortgage-backed securities:
	Federal agencies	100,222			3,256		(261	)		103,217
	Residential	7,790			951		(18	)		8,723
	Commercial	15,415			627		(53	)		15,989
	Total mortgage-backed securities	123,427			4,834		(332	)		127,929
	Corporate debt securities	14,508			767		(142	)		15,133
	Collateralized loan and other debt obligations (1)	27,352			448		(78	)		27,722
	Other (2)	5,715			213		(24	)		5,904
	Total debt securities	247,757			7,886		(1,544	)		254,099
	Marketable equity securities:
	Perpetual preferred securities	1,601			163		(72	)		1,692
	Other marketable equity securities	318			1,495		(1	)		1,812
	Total marketable equity securities	1,919			1,658		(73	)		3,504
	Total available-for-sale securities	249,676			9,544		(1,617	)		257,603
	Held-to-maturity securities:
	Securities of U.S. Treasury and federal agencies	44,244			1,441		(9	)		45,676
	Securities of U.S. states and political subdivisions	2,092			30		(1	)		2,121
	Federal agency mortgage-backed securities	14,311			182		(21	)		14,472
	Collateralized loans and other debt obligations (1)	1,404			1		(2	)		1,403
	Other (2)	5,082			27		—			5,109
	Total held-to-maturity securities	67,133			1,681		(33	)		68,781
	Total	$	316,809		11,225		(1,650	)		326,384
	December 31, 2014
	Available-for-sale securities:
	Securities of U.S. Treasury and federal agencies	$	25,898		44		(138	)		25,804
	Securities of U.S. states and political subdivisions	43,939			1,504		(499	)		44,944
	Mortgage-backed securities:
	Federal agencies	107,850			2,990		(751	)		110,089
	Residential	8,213			1,080		(24	)		9,269
	Commercial	16,248			803		(57	)		16,994
	Total mortgage-backed securities	132,311			4,873		(832	)		136,352
	Corporate debt securities	14,211			745		(170	)		14,786
	Collateralized loan and other debt obligations (1)	25,137			408		(184	)		25,361
	Other (2)	6,251			295		(27	)		6,519
	Total debt securities	247,747			7,869		(1,850	)		253,766
	Marketable equity securities:
	Perpetual preferred securities	1,622			148		(70	)		1,700
	Other marketable equity securities	284			1,694		(2	)		1,976
	Total marketable equity securities	1,906			1,842		(72	)		3,676
	Total available-for-sale securities	249,653			9,711		(1,922	)		257,442
	Held-to-maturity securities:
	Securities of U.S. Treasury and federal agencies	40,886			670		(8	)		41,548
	Securities of U.S. states and political subdivisions	1,962			27		—			1,989
	Federal agency mortgage-backed securities	5,476			165		—			5,641
	Collateralized loans and other debt obligations (1)	1,404			—		(13	)		1,391
	Other (2)	5,755			35		—			5,790
	Total held-to-maturity securities	55,483			897		(21	)		56,359
	Total	$	305,136		10,608		(1,943	)		313,801
	-1	The available-for-sale portfolio includes collateralized debt obligations (CDOs) with a cost basis and fair value of $363 million and $487 million, respectively, at March 31, 2015, and $364 million and $500 million, respectively, at December 31, 2014. The held-to-maturity portfolio only includes collateralized loan obligations.
	-2	The “Other” category of available-for-sale securities mostly includes asset-backed securities collateralized by credit cards, student loans, home equity loans and auto leases or loans and cash. Included in the “Other” category of held-to-maturity securities are asset-backed securities collateralized by auto leases or loans and cash with both a cost basis and fair value of $3.1 billion at March 31, 2015, and $3.8 billion at December 31, 2014. Also included in the “Other” category of held-to-maturity securities are asset-backed securities collateralized by dealer floorplan loans with a cost basis of $1.9 billion and fair value of $2.0 billion at both March 31, 2015 and December 31, 2014.
Investment Securities Gross Unrealized Losses Over And Under 12 Months	The following table shows the gross unrealized losses and fair value of securities in the investment securities portfolio by length of time that individual securities in each category have been in a continuous loss position. Debt securities on which we have taken credit-related OTTI write-downs are categorized as being “less than 12 months” or “12 months or more” in a continuous loss position based on the point in time that the fair value declined to below the cost basis and not the period of time since the credit-related OTTI write-down.
		Less than 12 months					12 months or more						Total
	(in millions)	Gross			Fair		Gross			Fair			Gross			Fair
		unrealized			value		unrealized			value			unrealized			value
		losses					losses						losses
	March 31, 2015
	Available-for-sale securities:
	Securities of U.S. Treasury and federal agencies	$	(7	)	1,722		(26	)		4,013			(33	)		5,735
	Securities of U.S. states and political subdivisions	(579		)	17,860		(356	)		3,685			(935	)		21,545
	Mortgage-backed securities:
	Federal agencies	(73		)	14,416		(188	)		11,410			(261	)		25,826
	Residential	(12		)	919		(6	)		260			(18	)		1,179
	Commercial	(11		)	2,312		(42	)		1,490			(53	)		3,802
	Total mortgage-backed securities	(96		)	17,647		(236	)		13,160			(332	)		30,807
	Corporate debt securities	(91		)	1,464		(51	)		723			(142	)		2,187
	Collateralized loan and other debt obligations	(17		)	6,079		(61	)		3,949			(78	)		10,028
	Other	(20		)	843		(4	)		239			(24	)		1,082
	Total debt securities	(810		)	45,615		(734	)		25,769			(1,544	)		71,384
	Marketable equity securities:
	Perpetual preferred securities	(3		)	82		(69	)		615			(72	)		697
	Other marketable equity securities	(1		)	16		—			—			(1	)		16
	Total marketable equity securities	(4		)	98		(69	)		615			(73	)		713
	Total available-for-sale securities	(814		)	45,713		(803	)		26,384			(1,617	)		72,097
	Held-to-maturity securities:
	Securities of U.S. Treasury and federal agencies	(9		)	1,529		—			—			(9	)		1,529
	Securities of U.S. states and political subdivisions	(1		)	298		—			—			(1	)		298
	Federal agency mortgage-backed securities	(21		)	8,100		—			—			(21	)		8,100
	Collateralized loan and other debt obligations	(2		)	1,229		—			—			(2	)		1,229
	Total held-to-maturity securities	(33		)	11,156		—			—			(33	)		11,156
	Total	$	(847	)	56,869		(803	)		26,384			(1,650	)		83,253
	December 31, 2014
	Available-for-sale securities:
	Securities of U.S. Treasury and federal agencies	$	(16	)	7,138		(122	)		5,719			(138	)		12,857
	Securities of U.S. states and political subdivisions	(198		)	10,228		(301	)		3,725			(499	)		13,953
	Mortgage-backed securities:
	Federal agencies	(16		)	1,706		(735	)		37,854			(751	)		39,560
	Residential	(18		)	946		(6	)		144			(24	)		1,090
	Commercial	(9		)	2,202		(48	)		1,532			(57	)		3,734
	Total mortgage-backed securities	(43		)	4,854		(789	)		39,530			(832	)		44,384
	Corporate debt securities	(102		)	1,674		(68	)		1,265			(170	)		2,939
	Collateralized loan and other debt obligations	(99		)	12,755		(85	)		3,958			(184	)		16,713
	Other	(23		)	708		(4	)		277			(27	)		985
	Total debt securities	(481		)	37,357		(1,369	)		54,474			(1,850	)		91,831
	Marketable equity securities:
	Perpetual preferred securities	(2		)	92		(68	)		633			(70	)		725
	Other marketable equity securities	(2		)	41		—			—			(2	)		41
	Total marketable equity securities	(4		)	133		(68	)		633			(72	)		766
	Total available-for-sale securities	(485		)	37,490		(1,437	)		55,107			(1,922	)		92,597
	Held-to-maturity securities:
	Securities of U.S. Treasury and federal agencies	(8		)	1,889		—			—			(8	)		1,889
	Collateralized loan and other debt obligations	(13		)	1,391		—			—			(13	)		1,391
	Total held-to-maturity securities	(21		)	3,280		—			—			(21	)		3,280
	Total	$	(506	)	40,770		(1,437	)		55,107			(1,943	)		95,877
Investment Securities Gross Unrealized Losses By Investment Grade	The following table shows the gross unrealized losses and fair value of debt and perpetual preferred investment securities by those rated investment grade and those rated less than investment grade, according to their lowest credit rating by Standard & Poor’s Rating Services (S&P) or Moody’s Investors Service (Moody’s). Credit ratings express opinions about the credit quality of a security. Securities rated investment grade, that is those rated BBB- or higher by S&P or Baa3 or higher by Moody’s, are generally considered by the rating agencies and market participants to be low credit risk. Conversely, securities rated below investment grade, labeled as “speculative grade” by the rating agencies, are considered to be distinctively higher credit risk than investment grade securities. We have also included securities not rated by S&P or Moody’s in the table below based on our internal credit grade of the securities (used for credit risk management purposes) equivalent to the credit rating assigned by major credit agencies. The unrealized losses and fair value of unrated securities categorized as investment grade based on internal credit grades were $25 million and $2.1 billion, respectively, at March 31, 2015, and $25 million and $1.6 billion, respectively, at December 31, 2014. If an internal credit grade was not assigned, we categorized the security as non-investment grade.
		Investment grade					Non-investment grade
	(in millions)	Gross			Fair		Gross			Fair
		unrealized			value		unrealized			value
		losses					losses
	March 31, 2015
	Available-for-sale securities:
	Securities of U.S. Treasury and federal agencies	$	(33	)	5,735		—			—
	Securities of U.S. states and political subdivisions	(895		)	21,229		(40	)		316
	Mortgage-backed securities:
	Federal agencies	(261		)	25,826		—			—
	Residential	(1		)	134		(17	)		1,045
	Commercial	(25		)	3,423		(28	)		379
	Total mortgage-backed securities	(287		)	29,383		(45	)		1,424
	Corporate debt securities	(16		)	1,186		(126	)		1,001
	Collateralized loan and other debt obligations	(68		)	9,947		(10	)		81
	Other	(20		)	847		(4	)		235
	Total debt securities	(1,319		)	68,327		(225	)		3,057
	Perpetual preferred securities	(72		)	697		—			—
	Total available-for-sale securities	(1,391		)	69,024		(225	)		3,057
	Held-to-maturity securities:
	Securities of U.S. Treasury and federal agencies	(9		)	1,529		—			—
	Securities of U.S. states and political subdivisions	(1		)	298		—			—
	Federal agency mortgage-backed securities	(21		)	8,100		—			—
	Collateralized loan and other debt obligations	(2		)	1,229		—			—
	Total held-to-maturity securities	(33		)	11,156		—			—
	Total	$	(1,424	)	80,180		(225	)		3,057
	December 31, 2014
	Available-for-sale securities:
	Securities of U.S. Treasury and federal agencies	$	(138	)	12,857		—			—
	Securities of U.S. states and political subdivisions	(459		)	13,600		(40	)		353
	Mortgage-backed securities:
	Federal agencies	(751		)	39,560		—			—
	Residential	—			139		(24	)		951
	Commercial	(24		)	3,366		(33	)		368
	Total mortgage-backed securities	(775		)	43,065		(57	)		1,319
	Corporate debt securities	(39		)	1,807		(131	)		1,132
	Collateralized loan and other debt obligations	(172		)	16,609		(12	)		104
	Other	(23		)	782		(4	)		203
	Total debt securities	(1,606		)	88,720		(244	)		3,111
	Perpetual preferred securities	(70		)	725		—			—
	Total available-for-sale securities	(1,676		)	89,445		(244	)		3,111
	Held-to-maturity securities:
	Securities of U.S. Treasury and federal agencies	(8		)	1,889		—			—
	Collateralized loan and other debt obligations	(13		)	1,391		—			—
	Total held-to-maturity securities	(21		)	3,280		—			—
	Total	$	(1,697	)	92,725		(244	)		3,111
Debt Securities Contractual Maturities	The following table shows the remaining contractual maturities and contractual weighted-average yields (taxable-equivalent basis) of available-for-sale debt securities. The remaining contractual principal maturities for MBS do not consider prepayments. Remaining expected maturities will differ from contractual maturities because borrowers may have the right to prepay obligations before the underlying mortgages mature.
							Remaining contractual maturity
		Total					Within one year							After one year						After five years				After ten years
														through five years						through ten years
	(in millions)	amount			Yield		Amount				Yield			Amount				Yield		Amount		Yield		Amount		Yield
	March 31, 2015
	Available-for-sale securities (1):
	Securities of U.S. Treasury and federal agencies	$	30,031		1.47	%	$	56			1.09	%		$	26,702			1.42	%	$	3,273	1.85	%	$	—	—	%
	Securities of U.S. states and political subdivisions	47,380			5.72		3,820				1.71			6,469				2.26		3,179		5.21		33,912		6.87
	Mortgage-backed securities:
	Federal agencies	103,217			3.27		—				—			399				1.94		712		3.99		102,106		3.27
	Residential	8,723			4.52		—				—			14				5.1		72		5.64		8,637		4.51
	Commercial	15,989			5.23		—				—			60				2.63		—		—		15,929		5.24
	Total mortgage-backed securities	127,929			3.6		—				—			473				2.12		784		4.14		126,672		3.6
	Corporate debt securities	15,133			4.89		675				4.09			7,923				4.61		5,163		5.21		1,372		5.71
	Collateralized loan and other debt obligations	27,722			1.91		—				—			857				0.75		10,765		1.79		16,100		2.05
	Other	5,904			1.8		275				1.53			1,277				2.59		945		1.24		3,407		1.68
	Total available-for-sale debt securities at fair value	$	254,099		3.59	%	$	4,826			2.03	%		$	43,701			2.15	%	$	24,109	3.04	%	$	181,463	4.05	%
	December 31, 2014
	Available-for-sale securities (1):													`
	Securities of U.S. Treasury and federal agencies	$	25,804		1.49	%	$	181			1.47	%		$	22,348			1.44	%	$	3,275	1.83	%	$	—	—	%
	Securities of U.S. states and political subdivisions	44,944			5.66		3,568				1.71			7,050				2.19		3,235		5.13		31,091		6.96
	Mortgage-backed securities:
	Federal agencies	110,089			3.27		—				—			276				2.86		1,011		3.38		108,802		3.27
	Residential	9,269			4.5		—				—			9				4.81		83		5.63		9,177		4.49
	Commercial	16,994			5.16		1				0.28			62				2.71		5		1.3		16,926		5.17
	Total mortgage-backed securities	136,352			3.59		1				0.28			347				2.88		1,099		3.54		134,905		3.59
	Corporate debt securities	14,786			4.9		600				4.32			7,634				4.54		5,209		5.3		1,343		5.7
	Collateralized loan and other debt obligations	25,361			1.83		23				1.95			944				0.71		8,472		1.67		15,922		1.99
	Other	6,519			1.79		274				1.55			1,452				2.56		1,020		1.32		3,773		1.64
	Total available-for-sale debt securities at fair value	$	253,766		3.6	%	$	4,647			2.03	%		$	39,775			2.2	%	$	22,310	3.12	%	$	187,034	3.99	%
	-1	Weighted-average yields displayed by maturity bucket are weighted based on fair value and predominantly represent contractual coupon rates without effect for any related hedging derivatives.
	The following table shows the amortized cost and weighted-average yields of held-to-maturity debt securities by contractual maturity.
							Remaining contractual maturity
		Total					Within one year							After one year						After five years				After ten years
														through five years						through ten years
	(in millions)	amount			Yield		Amount				Yield			Amount				Yield		Amount		Yield		Amount		Yield
	March 31, 2015
	Held-to-maturity securities (1):
	Amortized cost:
	Securities of U.S. Treasury and federal agencies	$	44,244		2.12	%	$	—			—	%		$	—			—	%	$	44,244	2.12	%	$	—	—	%
	Securities of U.S. states and political subdivisions	2,092			5.7		—				—			—				—		65		7.7		2,027		5.64
	Federal agency mortgage-backed securities	14,311			3.47		—				—			—				—		—		—		14,311		3.47
	Collateralized loan and other debt obligations	1,404			1.97		—				—			—				—		—		—		1,404		1.97
	Other	5,082			1.56		200				1.62			3,553				1.62		1,329		1.4		—		—
	Total held-to-maturity debt securities at amortized cost	$	67,133		2.47	%	$	200			1.62	%		$	3,553			1.62	%	$	45,638	2.11	%	$	17,742	3.6	%
	December 31, 2014
	Held-to-maturity securities (1):
	Amortized cost:
	Securities of U.S. Treasury and federal agencies	$	40,886		2.12	%	$	—			—	%		$	—			—	%	$	40,886	2.12	%	$	—	—	%
	Securities of U.S. states and political subdivisions	1,962			5.6		—				—			—				—		9		6.6		1,953		5.59
	Federal agency mortgage-backed securities	5,476			3.89		—				—			—				—		—		—		5,476		3.89
	Collateralized loan and other debt obligations	1,404			1.96		—				—			—				—		—		—		1,404		1.96
	Other	5,755			1.64		192				1.61			4,214				1.72		1,349		1.41		—		—
	Total held-to-maturity debt securities at amortized cost	$	55,483		2.37	%	$	192			1.61	%		$	4,214			1.72	%	$	42,244	2.1	%	$	8,833	3.96	%
	-1	Weighted-average yields displayed by maturity bucket are weighted based on amortized cost and predominantly represent contractual coupon rates.
	The following table shows the fair value of held-to-maturity debt securities by contractual maturity.
					Remaining contractual maturity
		Total			Within one year			After one year				After five years				After ten years
								through five years				through ten years
	(in millions)	amount			Amount			Amount				Amount				Amount
	March 31, 2015
	Held-to-maturity securities:
	Fair value:
Securities of U.S. Treasury and federal agencies	$	45,676		$	—		$	—			$	45,676			$	—
Securities of U.S. states and political subdivisions	2,121			—			—				67				2,054
Federal agency mortgage-backed securities	14,472			—			—				—				14,472
Collateralized loan and other debt obligations	1,403			—			—				—				1,403
Other	5,109			201			3,574				1,334				—
Total held-to-maturity debt securities at fair value	$	68,781		$	201		$	3,574			$	47,077			$	17,929
December 31, 2014
Held-to-maturity securities:
Fair value:
Securities of U.S. Treasury and federal agencies	$	41,548		$	—		$	—			$	41,548			$	—
Securities of U.S. states and political subdivisions	1,989			—			—				9				1,980
Federal agency mortgage-backed securities	5,641			—			—				—				5,641
Collateralized loan and other debt obligations	1,391			—			—				—				1,391
Other	5,790			193			4,239				1,358				—
Total held-to-maturity debt securities at fair value	$	56,359		$	193		$	4,239			$	42,915			$	9,012
Investment Securities Realized Gains And Losses	The following table shows the gross realized gains and losses on sales and OTTI write-downs related to the available-for-sale securities portfolio, which includes marketable equity securities,
	as well as net realized gains and losses on nonmarketable equity investments (see Note 6 (Other Assets)).
		Quarter ended March 31,
	(in millions)	2015			2014
	Gross realized gains	$	348		391
	Gross realized losses	(20		)	(3	)
	OTTI write-downs	(31		)	(9	)
	Net realized gains from available-for-sale securities	297			379
	Net realized gains from nonmarketable equity investments	351			551
	Net realized gains from debt securities and equity investments	$	648		930
Investment Securities And Nonmarketable Equity Securities Other Than Temporary Impairment	The following table shows the detail of total OTTI write-downs included in earnings for available-for-sale debt securities, marketable equity securities and nonmarketable equity investments. There were no OTTI write-downs on held-to-maturity securities during first quarter 2015 and 2014.
		Quarter ended March 31,
	(in millions)	2015			2014
	OTTI write-downs included in earnings
	Debt securities:
	Securities of U.S. states and political subdivisions	$	16		—
	Mortgage-backed securities:
	Residential	15			5
	Commercial	—			2
	Total debt securities	31			7
	Equity securities:
	Marketable equity securities:
	Other marketable equity securities	—			2
	Total marketable equity securities	—			2
	Total investment securities	31			9
	Nonmarketable equity investments	42			126
	Total OTTI write-downs included in earnings	$	73		135
Debt Securities Other Than Temporary Impairment	The following table shows the detail of OTTI write-downs on available-for-sale debt securities included in earnings and the related changes in OCI for the same securities.
		Quarter ended March 31,
	(in millions)	2015			2014
	OTTI on debt securities
	Recorded as part of gross realized losses:
	Credit-related OTTI	$	20		7
	Intent-to-sell OTTI	11			—
	Total recorded as part of gross realized losses	31			7
	Changes to OCI for losses (reversal of losses) in non-credit-related OTTI (1):
	Securities of U.S. states and political subdivisions	(1		)	—
	Residential mortgage-backed securities	(21		)	(9	)
	Commercial mortgage-backed securities	(15		)	(12	)
	Total changes to OCI for non-credit-related OTTI	(37		)	(21	)
	Total OTTI losses (reversal of losses) recorded on debt securities	$	(6	)	(14	)
	-1	Represents amounts recorded to OCI for impairment, due to factors other than credit, on debt securities that have also had credit-related OTTI write-downs during the period. Increases represent initial or subsequent non-credit-related OTTI on debt securities. Decreases represent partial to full reversal of impairment due to recoveries in the fair value of securities due to non-credit factors.
Credit Loss Component Of Credit-Impaired Debt Securities	The following table presents a rollforward of the OTTI credit loss that has been recognized in earnings as a write-down of available-for-sale debt securities we still own (referred to as "credit-impaired" debt securities) and do not intend to sell. Recognized credit loss represents the difference between the present value of expected future cash flows discounted using the security’s current effective interest rate and the amortized cost basis of the security prior to considering credit loss.
		Quarter ended March 31,
	(in millions)	2015			2014
	Credit loss recognized, beginning of year	$	1,025		1,171
	Additions:
	For securities with previous credit impairments	20			7
	Total additions	20			7
	Reductions:
	For securities sold, matured, or intended/required to be sold	(14		)	(29	)
	For recoveries of previous credit impairments (1)	(2		)	(6	)
	Total reductions	(16		)	(35	)
	Credit loss recognized, end of year	$	1,029		1,143
	-1	Recoveries of previous credit impairments result from increases in expected cash flows subsequent to credit loss recognition. Such recoveries are reflected prospectively as interest yield adjustments using the effective interest method.

Loans_and_Allowance_for_Credit1

Loans and Allowance for Credit Losses (Tables)	3 Months Ended
	Mar. 31, 2015
Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract]
Loans and Allowance for Credit Losses, Loans Outstanding	The following table presents total loans outstanding by portfolio segment and class of financing receivable. Outstanding balances include a total net reduction of $4.2 billion and $4.5 billion at March 31, 2015, and December 31, 2014, respectively, for unearned income, net deferred loan fees, and unamortized discounts and premiums.
	(in millions)	Mar 31,				Dec 31,
		2015				2014
	Commercial:
	Commercial and industrial	$	271,088			271,795
	Real estate mortgage	111,848				111,996
	Real estate construction	19,981				18,728
	Lease financing	12,382				12,307
	Total commercial	415,299				414,826
	Consumer:
	Real estate 1-4 family first mortgage	265,213				265,386
	Real estate 1-4 family junior lien mortgage	57,839				59,717
	Credit card	30,078				31,119
	Automobile	56,339				55,740
	Other revolving credit and installment	36,463				35,763
	Total consumer	445,932				447,725
	Total loans	$	861,231			862,551
	Our foreign loans are reported by respective class of financing receivable in the table above. Substantially all of our foreign loan portfolio is commercial loans. Loans are classified as foreign primarily based on whether the borrower’s primary address is outside of the United States. The following table presents total commercial foreign loans outstanding by class of financing receivable.
	(in millions)	Mar 31,				Dec 31,
		2015				2014
	Commercial foreign loans:
	Commercial and industrial	$	45,325			44,707
	Real estate mortgage	5,171				4,776
	Real estate construction	241				218
	Lease financing	307				336
	Total commercial foreign loans	$	51,044			50,037
Loans and Allowance for Credit Losses, Significant Activity	The following table summarizes the proceeds paid or received for purchases and sales of loans and transfers from loans held for investment to mortgages/loans held for sale at lower of cost or fair value. This loan activity primarily includes loans purchased and sales of whole loan or participating interests, whereby we receive or transfer a portion of a loan after origination. The table excludes PCI loans and loans recorded at fair value, including loans originated for sale because their loan activity normally does not impact the allowance for credit losses.
										Quarter ended March 31,
		2015								2014
	(in millions)	Commercial				Consumer		Total		Commercial		Consumer		Total
	Purchases (1)	$	1,091			—		1,091		1,014		168		1,182
	Sales	(206		)		(29	)	(235	)	(1,641	)	(50	)	(1,691	)
	Transfers to MHFS/LHFS (1)	(7		)		(2	)	(9	)	(35	)	(5	)	(40	)
	-1	The “Purchases” and “Transfers to MHFS/LHFS" categories exclude activity in government insured/guaranteed real estate 1-4 family first mortgage loans. As servicer, we are able to buy delinquent insured/guaranteed loans out of the Government National Mortgage Association (GNMA) pools. These loans are predominantly insured by the Federal Housing Administration (FHA) or guaranteed by the Department of Veterans Affairs (VA). Accordingly, these loans have limited impact on the allowance for loan losses. On a net basis, such purchases net of transfers to MHFS were $1.1 billion and $1.5 billion for first quarter 2015 and 2014, respectively.
Loans and Allowance for Credit Losses, Commitments to Lend	The contractual amount of our unfunded credit commitments, including unissued standby and commercial letters of credit, is summarized by portfolio segment and class of financing receivable in the following table. The table excludes the standby and commercial letters of credit and temporary advance arrangements described above.
	(in millions)	Mar 31,				Dec 31,
		2015				2014
	Commercial:
	Commercial and industrial	$	280,803			278,093
	Real estate mortgage	6,359				6,134
	Real estate construction	15,692				15,587
	Lease financing	3				3
	Total commercial	302,857				299,817
	Consumer:
	Real estate 1-4 family first mortgage	37,487				32,055
	Real estate 1-4 family	45,196				45,492
	junior lien mortgage
	Credit card	96,437				95,062
	Other revolving credit and installment	25,635				24,816
	Total consumer	204,755				197,425
	Total unfunded	$	507,612			497,242
	credit commitments
Loans and Allowance for Credit Losses, Allowance for Credit Losses	Changes in the allowance for credit losses were:
		Three months ended March 31,
	(in millions)	2015			2014
	Balance, beginning of period	13,169			14,971
	Provision for credit losses	608			325
	Interest income on certain impaired loans (1)	(52	)		(56	)
	Loan charge-offs:
	Commercial:
	Commercial and industrial	(133	)		(163	)
	Real estate mortgage	(23	)		(20	)
	Real estate construction	(1	)		(1	)
	Lease financing	(3	)		(4	)
	Total commercial	(160	)		(188	)
	Consumer:
	Real estate 1-4 family first mortgage	(130	)		(223	)
	Real estate 1-4 family junior lien mortgage	(179	)		(249	)
	Credit card	(278	)		(267	)
	Automobile	(195	)		(180	)
	Other revolving credit and installment	(154	)		(177	)
	Total consumer	(936	)		(1,096	)
	Total loan charge-offs	(1,096	)		(1,284	)
	Loan recoveries:
	Commercial:
	Commercial and industrial	69			114
	Real estate mortgage	34			42
	Real estate construction	10			24
	Lease financing	3			3
	Total commercial	116			183
	Consumer:
	Real estate 1-4 family first mortgage	47			53
	Real estate 1-4 family junior lien mortgage	56			57
	Credit card	39			36
	Automobile	94			90
	Other revolving credit and installment	36			40
	Total consumer	272			276
	Total loan recoveries	388			459
	Net loan charge-offs (2)	(708	)		(825	)
	Allowances related to business combinations/other	(4	)		(1	)
	Balance, end of period	13,013			14,414
	Components:
	Allowance for loan losses	12,176			13,695
	Allowance for unfunded credit commitments	837			719
	Allowance for credit losses (3)	13,013			14,414
	Net loan charge-offs (annualized) as a percentage of average total loans (2)	0.33			0.41
	Allowance for loan losses as a percentage of total loans (3)	1.41			1.66
	Allowance for credit losses as a percentage of total loans (3)	1.51			1.74
	-1	Certain impaired loans with an allowance calculated by discounting expected cash flows using the loan’s effective interest rate over the remaining life of the loan recognize reductions in the allowance as interest income.
	-2	For PCI loans, charge-offs are only recorded to the extent that losses exceed the purchase accounting estimates.
	-3	The allowance for credit losses includes $9 million and $21 million at March 31, 2015 and 2014, respectively, related to PCI loans acquired from Wachovia. Loans acquired from Wachovia are included in total loans net of related purchase accounting net write-downs.
Loans and Allowance for Credit Losses, Allowance for Credit Losses by Category	The following table summarizes the activity in the allowance for credit losses by our commercial and consumer portfolio segments.
								2015						2014
	(in millions)	Commercial				Consumer		Total		Commercial		Consumer		Total
	Quarter ended March 31,
	Balance, beginning of period	$	6,377			6,792		13,169		6,103		8,868		14,971
	Provision for credit losses	9				599		608		263		62		325
	Interest income on certain impaired loans	(5		)		(47	)	(52	)	(6	)	(50	)	(56	)
	Loan charge-offs	(160		)		(936	)	(1,096	)	(188	)	(1,096	)	(1,284	)
	Loan recoveries	116				272		388		183		276		459
	Net loan charge-offs	(44		)		(664	)	(708	)	(5	)	(820	)	(825	)
	Allowance related to business combinations/other	(4		)		—		(4	)	(1	)	—		(1	)
	Balance, end of period	$	6,333			6,680		13,013		6,354		8,060		14,414
Loans and Allowance for Credit Losses, by Impairment Methodology	The following table disaggregates our allowance for credit losses and recorded investment in loans by impairment methodology.
		Allowance for credit losses								Recorded investment in loans
	(in millions)	Commercial				Consumer		Total		Commercial		Consumer		Total
	March 31, 2015
	Collectively evaluated (1)	$	5,550			3,705		9,255		410,519		403,241		813,760
	Individually evaluated (2)	774				2,975		3,749		3,702		21,380		25,082
	PCI (3)	9				—		9		1,078		21,311		22,389
	Total	$	6,333			6,680		13,013		415,299		445,932		861,231
	December 31, 2014
	Collectively evaluated (1)	$	5,482			3,706		9,188		409,560		404,263		813,823
	Individually evaluated (2)	884				3,086		3,970		3,759		21,649		25,408
	PCI (3)	11				—		11		1,507		21,813		23,320
	Total	$	6,377			6,792		13,169		414,826		447,725		862,551
	-1	Represents loans collectively evaluated for impairment in accordance with Accounting Standards Codification (ASC) 450-20,Loss Contingencies(formerly FAS 5), and pursuant to amendments by ASU 2010-20 regarding allowance for non-impaired loans.
	-2	Represents loans individually evaluated for impairment in accordance with ASC 310-10, Receivables (formerly FAS 114), and pursuant to amendments by ASU 2010-20 regarding allowance for impaired loans.
	-3	Represents the allowance and related loan carrying value determined in accordance with ASC 310-30, Receivables – Loans and Debt Securities Acquired with Deteriorated Credit Quality (formerly SOP 03-3) and pursuant to amendments by ASU 2010-20 regarding allowance for PCI loans.
Loans by Credit Quality Indicator	The following table provides a breakdown of outstanding commercial loans by risk category. Of the $7.5 billion in criticized commercial real estate (CRE) loans at March 31, 2015, $1.5 billion has been placed on nonaccrual status and written down to net realizable collateral value. CRE loans have a high level of monitoring in place to manage these assets and mitigate loss exposure.
	(in millions)	Commercial				Real		Real		Lease		Total
		and				estate		estate		financing
		industrial				mortgage		construction
	March 31, 2015
	By risk category:
	Pass	$	254,884			104,252		19,025		11,956		390,117
	Criticized	16,135				6,710		833		426		24,104
	Total commercial loans (excluding PCI)	271,019				110,962		19,858		12,382		414,221
	Total commercial PCI loans (carrying value)	69				886		123		—		1,078
	Total commercial loans	$	271,088			111,848		19,981		12,382		415,299
	December 31, 2014
	By risk category:
	Pass	$	255,611			103,319		17,661		11,723		388,314
	Criticized	16,109				7,416		896		584		25,005
	Total commercial loans (excluding PCI)	271,720				110,735		18,557		12,307		413,319
	Total commercial PCI loans (carrying value)	75				1,261		171		—		1,507
	Total commercial loans	$	271,795			111,996		18,728		12,307		414,826
Loans by Delinquency Status, Commercial	The following table provides past due information for commercial loans, which we monitor as part of our credit risk management practices.
	(in millions)	Commercial				Real		Real		Lease		Total
		and				estate		estate		financing
		industrial				mortgage		construction
	March 31, 2015
	By delinquency status:
	Current-29 DPD and still accruing	$	269,892			109,300		19,666		12,334		411,192
	30-89 DPD and still accruing	433				295		10		25		763
	90+ DPD and still accruing	31				43		—		—		74
	Nonaccrual loans	663				1,324		182		23		2,192
	Total commercial loans (excluding PCI)	271,019				110,962		19,858		12,382		414,221
	Total commercial PCI loans (carrying value)	69				886		123		—		1,078
	Total commercial loans	$	271,088			111,848		19,981		12,382		415,299
	December 31, 2014
	By delinquency status:
	Current-29 DPD and still accruing	$	270,624			109,032		18,345		12,251		410,252
	30-89 DPD and still accruing	527				197		25		32		781
	90+ DPD and still accruing	31				16		—		—		47
	Nonaccrual loans	538				1,490		187		24		2,239
	Total commercial loans (excluding PCI)	271,720				110,735		18,557		12,307		413,319
	Total commercial PCI loans (carrying value)	75				1,261		171		—		1,507
	Total commercial loans	$	271,795			111,996		18,728		12,307		414,826
Loans by Delinquency Status, Consumer	The following table provides the outstanding balances of our consumer portfolio by delinquency status.
	(in millions)	Real estate				Real estate		Credit		Automobile		Other		Total
		1-4 family				1-4 family		card				revolving
		first				junior lien						credit and
		mortgage				mortgage						installment
	March 31, 2015
	By delinquency status:
	Current-29 DPD	$	210,505			56,460		29,401		55,340		36,085		387,791
	30-59 DPD	2,065				337		188		792		169		3,551
	60-89 DPD	852				198		137		150		95		1,432
	90-119 DPD	417				116		124		51		81		789
	120-179 DPD	511				170		227		5		18		931
	180+ DPD	4,122				470		1		1		15		4,609
	Government insured/guaranteed loans (1)	25,518				—		—		—		—		25,518
	Total consumer loans (excluding PCI)	243,990				57,751		30,078		56,339		36,463		424,621
	Total consumer PCI loans (carrying value)	21,223				88		—		—		—		21,311
	Total consumer loans	$	265,213			57,839		30,078		56,339		36,463		445,932
	December 31, 2014
	By delinquency status:
	Current-29 DPD	$	208,642			58,182		30,356		54,365		35,356		386,901
	30-59 DPD	2,415				398		239		1,056		180		4,288
	60-89 DPD	993				220		160		235		111		1,719
	90-119 DPD	488				158		136		78		82		942
	120-179 DPD	610				194		227		5		21		1,057
	180+ DPD	4,258				464		1		1		13		4,737
	Government insured/guaranteed loans (1)	26,268				—		—		—		—		26,268
	Total consumer loans (excluding PCI)	243,674				59,616		31,119		55,740		35,763		425,912
	Total consumer PCI loans (carrying value)	21,712				101		—		—		—		21,813
	Total consumer loans	$	265,386			59,717		31,119		55,740		35,763		447,725
	-1	Represents loans whose repayments are predominantly insured by the FHA or guaranteed by the VA and student loans whose repayments are predominantly guaranteed by agencies on behalf of the U.S. Department of Education under the Federal Family Education Loan Program (FFELP). Loans insured/guaranteed by the FHA/VA and 90+ DPD totaled $15.0 billion at March 31, 2015, compared with $16.2 billion at December 31, 2014.
Loans by FICO Score, Consumer	The following table provides a breakdown of our consumer portfolio by updated FICO. We obtain FICO scores at loan origination and the scores are updated at least quarterly. The majority of our portfolio is underwritten with a FICO score of 680 and above. FICO is not available for certain loan types and may not be obtained if we deem it unnecessary due to strong collateral and other borrower attributes, primarily security-based loans of $6.1 billion at March 31, 2015, and $5.9 billion at December 31, 2014.
	(in millions)	Real estate				Real estate		Credit		Automobile		Other		Total
		1-4 family				1-4 family		card				revolving
		first				junior lien						credit and
		mortgage				mortgage						installment
	March 31, 2015
	By updated FICO:
	< 600	$	10,734			3,902		2,744		8,814		929		27,123
	600-639	7,790				2,732		2,582		6,256		1,048		20,408
	640-679	13,725				5,169		4,800		9,477		2,372		35,543
	680-719	24,563				8,673		6,087		10,181		4,344		53,848
	720-759	35,288				11,884		6,203		7,606		5,840		66,821
	760-799	82,421				17,151		4,938		7,254		7,810		119,574
	800+	41,069				7,352		2,498		6,226		6,008		63,153
	No FICO available	2,882				888		226		525		2,045		6,566
	FICO not required	—				—		—		—		6,067		6,067
	Government insured/guaranteed loans (1)	25,518				—		—		—		—		25,518
	Total consumer loans (excluding PCI)	243,990				57,751		30,078		56,339		36,463		424,621
	Total consumer PCI loans (carrying value)	21,223				88		—		—		—		21,311
	Total consumer loans	$	265,213			57,839		30,078		56,339		36,463		445,932
	December 31, 2014
	By updated FICO:
	< 600	$	11,166			4,001		2,639		8,825		894		27,525
	600-639	7,866				2,794		2,588		6,236		1,058		20,542
	640-679	13,894				5,324		4,931		9,352		2,366		35,867
	680-719	24,412				8,970		6,285		9,994		4,389		54,050
	720-759	35,490				12,171		6,407		7,475		5,896		67,439
	760-799	82,123				17,897		5,234		7,315		7,673		120,242
	800+	39,219				7,581		2,758		6,184		5,819		61,561
	No FICO available	3,236				878		277		359		1,814		6,564
	FICO not required	—				—		—		—		5,854		5,854
	Government insured/guaranteed loans (1)	26,268				—		—		—		—		26,268
	Total consumer loans (excluding PCI)	243,674				59,616		31,119		55,740		35,763		425,912
	Total consumer PCI loans (carrying value)	21,712				101		—		—		—		21,813
	Total consumer loans	$	265,386			59,717		31,119		55,740		35,763		447,725
	-1	Represents loans whose repayments are predominantly insured by the FHA or guaranteed by the VA and student loans whose repayments are predominantly guaranteed by agencies on behalf of the U.S. Department of Education under FFELP.
Loans by Loan to Value Ratio, Consumer	The following table shows the most updated LTV and CLTV distribution of the real estate 1-4 family first and junior lien mortgage loan portfolios. We consider the trends in residential real estate markets as we monitor credit risk and establish our allowance for credit losses. In the event of a default, any loss should be limited to the portion of the loan amount in excess of the net realizable value of the underlying real estate collateral value. Certain loans do not have an LTV or CLTV primarily due to industry data availability and portfolios acquired from or serviced by other institutions.
		March 31, 2015								December 31, 2014
	(in millions)	Real estate				Real estate		Total		Real estate		Real estate		Total
		1-4 family				1-4 family				1-4 family		1-4 family
		first				junior lien				first		junior lien
		mortgage				mortgage				mortgage		mortgage
		by LTV				by CLTV				by LTV		by CLTV
	By LTV/CLTV:
	0-60%	$	95,988			14,717		110,705		95,719		15,603		111,322
	60.01-80%	87,147				17,427		104,574		86,112		17,651		103,763
	80.01-100%	25,544				13,833		39,377		25,170		14,004		39,174
	100.01-120% (1)	5,908				7,023		12,931		6,133		7,254		13,387
	> 120% (1)	2,682				3,784		6,466		2,856		4,058		6,914
	No LTV/CLTV available	1,203				967		2,170		1,416		1,046		2,462
	Government insured/guaranteed loans (2)	25,518				—		25,518		26,268		—		26,268
	Total consumer loans (excluding PCI)	243,990				57,751		301,741		243,674		59,616		303,290
	Total consumer PCI loans (carrying value)	21,223				88		21,311		21,712		101		21,813
	Total consumer loans	$	265,213			57,839		323,052		265,386		59,717		325,103
	-1	Reflects total loan balances with LTV/CLTV amounts in excess of 100%. In the event of default, the loss content would generally be limited to only the amount in excess of 100% LTV/CLTV.
	-2	Represents loans whose repayments are predominantly insured by the FHA or guaranteed by the VA.
Nonaccrual Loans	The following table provides loans on nonaccrual status. PCI loans are excluded from this table because they continue to earn interest from accretable yield, independent of performance in accordance with their contractual terms.
	(in millions)	Mar 31,				Dec 31,
		2015				2014
	Commercial:
	Commercial and industrial	$	663			538
	Real estate mortgage	1,324				1,490
	Real estate construction	182				187
	Lease financing	23				24
	Total commercial (1)	2,192				2,239
	Consumer:
	Real estate 1-4 family first mortgage (2)	8,345				8,583
	Real estate 1-4 family junior lien mortgage	1,798				1,848
	Automobile	133				137
	Other revolving credit and installment	42				41
	Total consumer	10,318				10,609
	Total nonaccrual loans	$	12,510			12,848
	(excluding PCI)
	-1	Includes LHFS of $1 million at both March 31, 2015 and December 31, 2014.
	-2	Includes MHFS of $144 million and $177 million at March 31, 2015, and December 31, 2014, respectively.
90 days or More Past Due and Still Accruing Loans	The following table shows non-PCI loans 90 days or more past due and still accruing by class for loans not government insured/guaranteed.
	(in millions)	Mar 31, 2015				Dec 31, 2014
	Loans 90 days or more past due and still accruing:
	Total (excluding PCI):	$	16,344			17,810
	Less: FHA insured/guaranteed by the VA (1)(2)	15,453				16,827
	Less: Student loans guaranteed under the FFELP (3)	50				63
	Total, not government insured/guaranteed	$	841			920
	By segment and class, not government insured/guaranteed:
	Commercial:
	Commercial and industrial	$	31			31
	Real estate mortgage	43				16
	Real estate construction	—				—
	Total commercial	74				47
	Consumer:
	Real estate 1-4 family first mortgage (2)	221				260
	Real estate 1-4 family junior lien mortgage (2)	55				83
	Credit card	352				364
	Automobile	47				73
	Other revolving credit and installment	92				93
	Total consumer	767				873
	Total, not government insured/guaranteed	$	841			920
	-1	Represents loans whose repayments are predominantly insured by the FHA or guaranteed by the VA.
	-2	Includes mortgage loans held for sale 90 days or more past due and still accruing.
	-3	Represents loans whose repayments are predominantly guaranteed by agencies on behalf of the U.S. Department of Education under the FFELP.
Impaired Loans	The table below summarizes key information for impaired loans. Our impaired loans predominantly include loans on nonaccrual status in the commercial portfolio segment and loans modified in a TDR, whether on accrual or nonaccrual status. These impaired loans generally have estimated losses which are included in the allowance for credit losses. We have impaired loans with no allowance for credit losses when loss content has been previously recognized through charge-offs and we do not anticipate additional charge-offs or losses, or certain loans are currently performing in accordance with their terms and for which no loss has been estimated. Impaired loans exclude PCI loans. The table below includes trial modifications that totaled$432 million at March 31, 2015, and $452 million at December 31, 2014.
	For additional information on our impaired loans and allowance for credit losses, see Note 1 (Summary of Significant Accounting Policies) in our 2014 Form 10-K.
						Recorded investment
	(in millions)	Unpaid				Impaired		Impaired loans		Related
		principal				loans		with related		allowance for
		balance (1)						allowance for		credit losses
								credit losses
	March 31, 2015
	Commercial:
	Commercial and industrial	$	1,727			1,071		899		234
	Real estate mortgage	3,008				2,349		2,279		486
	Real estate construction	433				258		238		47
	Lease financing	33				24		24		7
	Total commercial	5,201				3,702		3,440		774
	Consumer:
	Real estate 1-4 family first mortgage	21,007				18,347		12,119		2,218
	Real estate 1-4 family junior lien mortgage	2,835				2,529		1,980		648
	Credit card	326				326		326		95
	Automobile	188				123		48		7
	Other revolving credit and installment	62				55		46		7
	Total consumer (2)	24,418				21,380		14,519		2,975
	Total impaired loans (excluding PCI)	$	29,619			25,082		17,959		3,749
	December 31, 2014
	Commercial:
	Commercial and industrial	$	1,524			926		757		240
	Real estate mortgage	3,190				2,483		2,405		591
	Real estate construction	491				331		308		45
	Lease financing	33				19		19		8
	Total commercial	5,238				3,759		3,489		884
	Consumer:
	Real estate 1-4 family first mortgage	21,324				18,600		12,433		2,322
	Real estate 1-4 family junior lien mortgage	3,094				2,534		2,009		653
	Credit card	338				338		338		98
	Automobile	190				127		55		8
	Other revolving credit and installment	60				50		42		5
	Total consumer (2)	25,006				21,649		14,877		3,086
	Total impaired loans (excluding PCI)	$	30,244			25,408		18,366		3,970
	-1	Excludes the unpaid principal balance for loans that have been fully charged off or otherwise have zero recorded investment.
	-2	Periods ended March 31, 2015 and December 31, 2014 each include the recorded investment of $2.1 billion of government insured/guaranteed loans that are predominantly insured by the FHA or guaranteed by the VA and generally do not have an allowance.
Impaired Loans, Average Recorded Investment and Interest Income	The following tables provide the average recorded investment in impaired loans and the amount of interest income recognized on impaired loans by portfolio segment and class.
		Quarter ended March 31,
		2015							2014
	(in millions)	Average				Recognized			Average		Recognized
		recorded				interest			recorded		interest
		investment				income			investment		income
	Commercial:
	Commercial and industrial	$	1,000			20			1,282		21
	Real estate mortgage	2,421				43			3,237		29
	Real estate construction	291				4			575		7
	Lease financing	21				—			33		—
	Total commercial	3,733				67			5,127		57
	Consumer:
	Real estate 1-4 family first mortgage	18,486				231			19,479		237
	Real estate 1-4 family junior lien mortgage	2,522				35			2,557		35
	Credit card	332				10			415		12
	Automobile	126				4			179		7
	Other revolving credit and installment	45				1			35		1
	Total consumer	21,511				281			22,665		292
	Total impaired loans (excluding PCI)	$	25,244			348			27,792		349
	Interest income:
	Cash basis of accounting					$	108				99
	Other (1)					240					250
	Total interest income					$	348				349
	-1	Includes interest recognized on accruing TDRs, interest recognized related to certain impaired loans which have an allowance calculated using discounting, and amortization of purchase accounting adjustments related to certain impaired loans.
Troubled Debt Restructurings, Modification by Type	The following table summarizes our TDR modifications for the periods presented by primary modification type and includes the financial effects of these modifications. For those loans that modify more than once, the table reflects each modification that occurred during the period. Loans that both modify and resolve within the period, as well as changes in recorded investment during the period for loans modified in prior periods, are not included in the table.
		Primary modification type (1)										Financial effects of modifications
	(in millions)	Principal (2)				Interest		Other		Total		Charge-		Weighted		Recorded
						rate		concessions (3)				offs (4)		average		investment
						reduction								interest		related to
														rate		interest rate
														reduction		reduction (5)
	Quarter ended March 31, 2015
	Commercial:
	Commercial and industrial	$	—			10		224		234		2		0.76	%	$	10
	Real estate mortgage	—				21		309		330		1		1.35		21
	Real estate construction	11				1		44		56		—		0.17		1
	Total commercial	11				32		577		620		3		1.14		32
	Consumer:
	Real estate 1-4 family first mortgage	104				83		516		703		15		2.46		165
	Real estate 1-4 family junior lien mortgage	7				20		51		78		12		3.18		27
	Credit card	—				45		—		45		—		11.29		44
	Automobile	1				1		27		29		10		9.06		1
	Other revolving credit and installment	—				5		2		7		—		5.82		5
	Trial modifications (6)	—				—		(2	)	(2	)	—		—		—
	Total consumer	112				154		594		860		37		4.27		242
	Total	$	123			186		1,171		1,480		40		3.9	%	$	274
	Quarter ended March 31, 2014
	Commercial:
	Commercial and industrial	$	—			13		265		278		11		3.06	%	$	13
	Real estate mortgage	3				39		294		336		—		1.29		39
	Real estate construction	—				1		143		144		—		1.49		1
	Total commercial	3				53		702		758		11		1.71		53
	Consumer:
	Real estate 1-4 family first mortgage	173				108		757		1,038		32		2.73		246
	Real estate 1-4 family junior lien mortgage	18				34		63		115		18		3.24		50
	Credit card	—				36		—		36		—		10.12		36
	Automobile	1				1		23		25		10		9.58		1
	Other revolving credit and installment	—				1		1		2		—		4.9		1
	Trial modifications (6)	—				—		(29	)	(29	)	—		—		—
	Total consumer	192				180		815		1,187		60		3.63		334
	Total	$	195			233		1,517		1,945		71		3.37	%	$	387
	-1	Amounts represent the recorded investment in loans after recognizing the effects of the TDR, if any. TDRs may have multiple types of concessions, but are presented only once in the first modification type based on the order presented in the table above. The reported amounts include loans remodified of $522 million and $612 million, for quarters ended March 31, 2015 and 2014.
	-2	Principal modifications include principal forgiveness at the time of the modification, contingent principal forgiveness granted over the life of the loan based on borrower performance, and principal that has been legally separated and deferred to the end of the loan, with a zero percent contractual interest rate.
	-3	Other concessions include loan renewals, term extensions and other interest and noninterest adjustments, but exclude modifications that also forgive principal and/or reduce the contractual interest rate.
	-4	Charge-offs include write-downs of the investment in the loan in the period it is contractually modified. The amount of charge-off will differ from the modification terms if the loan has been charged down prior to the modification based on our policies. In addition, there may be cases where we have a charge-off/down with no legal principal modification. Modifications resulted in legally forgiving principal (actual, contingent or deferred) of $26 million and $48 million for the quarters ended March 31, 2015 and 2014, respectively.
	-5	Reflects the effect of reduced interest rates on loans with principal or interest rate reduction primary modification type.
	-6	Trial modifications are granted a delay in payments due under the original terms during the trial payment period. However, these loans continue to advance through delinquency status and accrue interest according to their original terms. Any subsequent permanent modification generally includes interest rate related concessions; however, the exact concession type and resulting financial effect are usually not known until the loan is permanently modified. Trial modifications for the period are presented net of previously reported trial modifications that became permanent in the current period.
Troubled Debt Restructuring, Current Defaults	The table below summarizes permanent modification TDRs that have defaulted in the current period within 12 months of their permanent modification date. We are reporting these defaulted TDRs based on a payment default definition of 90 days past due for the commercial portfolio segment and 60 days past due for the consumer portfolio segment.
		Recorded investment of defaults
		Quarter ended March 31,
	(in millions)	2015				2014
	Commercial:
	Commercial and industrial	$	8			14
	Real estate mortgage	23				42
	Real estate construction	1				3
	Total commercial	32				59
	Consumer:
	Real estate 1-4 family first mortgage	52				79
	Real estate 1-4 family junior lien mortgage	4				7
	Credit card	13				13
	Automobile	3				4
	Other revolving credit and installment	1				—
	Total consumer	73				103
	Total	$	105			162
Purchased Credit Impaired Loans, Loans Outstanding	The following table presents PCI loans net of any remaining purchase accounting adjustments. Real estate 1-4 family first mortgage PCI loans are predominantly Pick-a-Pay loans.
	(in millions)	Mar 31,				Dec 31,
		2015				2014
	Commercial:
	Commercial and industrial	$	69			75
	Real estate mortgage	886				1,261
	Real estate construction	123				171
	Total commercial	1,078				1,507
	Consumer:
	Real estate 1-4 family first mortgage	21,223				21,712
	Real estate 1-4 family junior lien mortgage	88				101
	Total consumer	21,311				21,813
	Total PCI loans (carrying value)	$	22,389			23,320
	Total PCI loans (unpaid principal balance)	$	31,596			32,924
Purchased Credit Impaired Loans, Accretable Yield	The change in the accretable yield related to PCI loans since the merger with Wachovia is presented in the following table.
	(in millions)
	Balance, December 31, 2008	$	10,447
	Addition of accretable yield due to acquisitions	132
	Accretion into interest income (1)	(12,783		)
	Accretion into noninterest income due to sales (2)	(430		)
	Reclassification from nonaccretable difference for loans with improving credit-related cash flows	8,568
	Changes in expected cash flows that do not affect nonaccretable difference (3)	11,856
	Balance, December 31, 2014	17,790
	Addition of accretable yield due to acquisitions	—
	Accretion into interest income (1)	(398		)
	Accretion into noninterest income due to sales (2)	(28		)
	Reclassification from nonaccretable difference for loans with improving credit-related cash flows	22
	Changes in expected cash flows that do not affect nonaccretable difference (3)	(61		)
	Balance, March 31, 2015	$	17,325
	-1	Includes accretable yield released as a result of settlements with borrowers, which is included in interest income.
	-2	Includes accretable yield released as a result of sales to third parties, which is included in noninterest income.
	-3	Represents changes in cash flows expected to be collected due to the impact of modifications, changes in prepayment assumptions, changes in interest rates on variable rate PCI loans and sales to third parties.
Purchased Credit Impaired Loans, Allowance for Credit Losses	The following table summarizes the changes in allowance for PCI loan losses since the merger with Wachovia.
	(in millions)	Commercial				Pick-a-Pay		Other		Total
								consumer
	31-Dec-08	$	—			—		—		—
	Provision for loan losses	1,629				—		104		1,733
	Charge-offs	(1,618		)		—		(104	)	(1,722	)
	Balance, December 31, 2014	11				—		—		11
	Provision for loan losses	5				—		—		5
	Charge-offs	(7		)		—		—		(7	)
	Balance, March 31, 2015	$	9			—		—		9
Purchased Credit Impaired Loans by Credit Quality Indicator	The following table provides a breakdown of commercial PCI loans by risk category.
	(in millions)	Commercial				Real		Real		Total
		and				estate		estate
		industrial				mortgage		construction
	March 31, 2015
	By risk category:
	Pass	$	13			407		84		504
	Criticized	56				479		39		574
	Total commercial PCI loans	$	69			886		123		1,078
	December 31, 2014
	By risk category:
	Pass	$	21			783		118		922
	Criticized	54				478		53		585
	Total commercial PCI loans	$	75			1,261		171		1,507
Purchased Credit Impaired Loans by Delinquency Status, Commercial	The following table provides past due information for commercial PCI loans.
	(in millions)	Commercial				Real		Real		Total
		and				estate		estate
		industrial				mortgage		construction
	March 31, 2015
	By delinquency status:
	Current-29 DPD and still accruing	$	69			811		114		994
	30-89 DPD and still accruing	—				9		—		9
	90+ DPD and still accruing	—				66		9		75
	Total commercial PCI loans	$	69			886		123		1,078
	December 31, 2014
	By delinquency status:
	Current-29 DPD and still accruing	$	75			1,135		161		1,371
	30-89 DPD and still accruing	—				48		5		53
	90+ DPD and still accruing	—				78		5		83
	Total commercial PCI loans	$	75			1,261		171		1,507
Purchased Credit Impaired Loans by Delinquency Status, Consumer	The following table provides the delinquency status of consumer PCI loans.
		March 31, 2015								December 31, 2014
	(in millions)	Real estate				Real estate		Total		Real estate		Real estate		Total
		1-4 family				1-4 family				1-4 family		1-4 family
		first				junior lien				first		junior lien
		mortgage				mortgage				mortgage		mortgage
	By delinquency status:
	Current-29 DPD and still accruing	$	19,187			226		19,413		19,236		168		19,404
	30-59 DPD and still accruing	1,782				7		1,789		1,987		7		1,994
	60-89 DPD and still accruing	863				3		866		1,051		3		1,054
	90-119 DPD and still accruing	364				3		367		402		2		404
	120-179 DPD and still accruing	378				2		380		440		3		443
	180+ DPD and still accruing	3,596				18		3,614		3,654		83		3,737
	Total consumer PCI loans (adjusted unpaid principal balance)	$	26,170			259		26,429		26,770		266		27,036
	Total consumer PCI loans (carrying value)	$	21,223			88		21,311		21,712		101		21,813
Purchased Credit Impaired Loans by FICO Score, Consumer	The following table provides FICO scores for consumer PCI loans.
		March 31, 2015								December 31, 2014
	(in millions)	Real estate				Real estate		Total		Real estate		Real estate		Total
		1-4 family				1-4 family				1-4 family		1-4 family
		first				junior lien				first		junior lien
		mortgage				mortgage				mortgage		mortgage
	By FICO:
	< 600	$	7,398			74		7,472		7,708		75		7,783
	600-639	5,267				45		5,312		5,416		53		5,469
	640-679	6,552				60		6,612		6,718		69		6,787
	680-719	4,083				42		4,125		4,008		39		4,047
	720-759	1,706				19		1,725		1,728		13		1,741
	760-799	850				9		859		875		6		881
	800+	220				1		221		220		1		221
	No FICO available	94				9		103		97		10		107
	Total consumer PCI loans (adjusted unpaid principal balance)	$	26,170			259		26,429		26,770		266		27,036
	Total consumer PCI loans (carrying value)	$	21,223			88		21,311		21,712		101		21,813
Purchased Credit Impaired Loans by Loan to Value Ratio, Consumer	The following table shows the distribution of consumer PCI loans by LTV for real estate 1-4 family first mortgages and by CLTV for real estate 1-4 family junior lien mortgages.
		March 31, 2015								December 31, 2014
	(in millions)	Real estate				Real estate		Total		Real estate		Real estate		Total
		1-4 family				1-4 family				1-4 family		1-4 family
		first				junior lien				first		junior lien
		mortgage				mortgage				mortgage		mortgage
		by LTV				by CLTV				by LTV		by CLTV
	By LTV/CLTV:
	0-60%	$	4,541			28		4,569		4,309		34		4,343
	60.01-80%	11,204				72		11,276		11,264		71		11,335
	80.01-100%	7,302				89		7,391		7,751		92		7,843
	100.01-120% (1)	2,242				43		2,285		2,437		44		2,481
	> 120% (1)	875				25		900		1,000		24		1,024
	No LTV/CLTV available	6				2		8		9		1		10
	Total consumer PCI loans (adjusted unpaid principal balance)	$	26,170			259		26,429		26,770		266		27,036
	Total consumer PCI loans (carrying value)	$	21,223			88		21,311		21,712		101		21,813
	-1	Reflects total loan balances with LTV/CLTV amounts in excess of 100%. In the event of default, the loss content would generally be limited to only the amount in excess of 100% LTV/CLTV.

Other_Assets_Tables

Other Assets (Tables)	3 Months Ended
	Mar. 31, 2015
Other Assets [Abstract]
Components of Other Assets	The components of other assets were:
	(in millions)	Mar 31,			Dec 31,
		2015			2014
	Nonmarketable equity investments:
	Cost method:
	Private equity and other	$	2,187		2,300
	Federal bank stock	4,725			4,733
	Total cost method	6,912			7,033
	Equity method:
	LIHTC investments (1)	7,464			7,278
	Private equity and other	5,121			5,132
	Total equity method	12,585			12,410
	Fair value (2)	2,549			2,512
	Total nonmarketable equity investments	22,046			21,955
	Corporate/bank-owned life insurance	19,050			18,982
	Accounts receivable (3)	30,600			27,151
	Interest receivable	5,095			4,871
	Core deposit intangibles	3,305			3,561
	Customer relationship and other amortized intangibles	800			857
	Foreclosed assets:
	Residential real estate:
	Government insured/guaranteed (3)	772			982
	Non-government insured/guaranteed	646			671
	Non-residential real estate	911			956
	Operating lease assets	3,277			2,714
	Due from customers on acceptances	222			201
	Other (4)	15,155			16,156
	Total other assets	$	101,879		99,057
	-1	Represents low income housing tax credit investments.
	-2	Represents nonmarketable equity investments for which we have elected the fair value option. See Note 13 (Fair Values of Assets and Liabilities) for additional information.
	-3	Certain government-guaranteed residential real estate mortgage loans upon foreclosure are included in Accounts receivable effective January 1, 2014. Both principal and interest related to these foreclosed real estate assets are collectible because the loans were predominantly insured by the FHA or guaranteed by the VA. For more information on ASU 2014-14 and the classification of certain government-guaranteed mortgage loans upon foreclosure, see Note 1 (Summary of Significant Accounting Policies) to Financial Statements in our 2014 10-K.
	-4	Includes derivatives designated as hedging instruments, derivatives not designated as hedging instruments, and derivative loan commitments, which are carried at fair value. See Note 12 (Derivatives) for additional information.
Income Related To Nonmarketable Equity Investments [Table Text Block]	Income (expense) related to nonmarketable equity investments was:
		Quarter ended Mar 31,
	(in millions)	2015			2014
	Net realized gains from nonmarketable equity investments	$	351		551
	All other	(148		)	(223	)
	Total	$	203		328

Securitizations_and_Variable_I1

Securitizations and Variable Interest Entities (Tables)	3 Months Ended
	Mar. 31, 2015
Securitizations and Variable Interest Entities [Abstract]
Assets and Liabilities associated with Variable Interest entities	The following table provides the classifications of assets and liabilities in our balance sheet for our transactions with VIEs.
	(in millions)	VIEs that we			VIEs		Transfers that				Total
		do not			that we		we account
		consolidate			consolidate		for as secured
							borrowings
	March 31, 2015
	Cash	$	—		155			36			191
	Trading assets	1,741			—			204			1,945
	Investment securities (1)	16,624			749			3,612			20,985
	Loans	12,415			4,830			5,032			22,277
	Mortgage servicing rights	11,589			—			—			11,589
	Other assets	7,607			314			42			7,963
	Total assets	49,976			6,048			8,926			64,950
	Short-term borrowings	—			—			2,513			2,513
	Accrued expenses and other liabilities	825			48		-2	1			874
	Long-term debt	2,690			1,562		-2	4,764			9,016
	Total liabilities	3,515			1,610			7,278			12,403
	Noncontrolling interests	—			111			—			111
	Net assets	$	46,461		4,327			1,648			52,436
	December 31, 2014
	Cash	$	—		117			4			121
	Trading assets	2,165			—			204			2,369
	Investment securities (1)	18,271			875			4,592			23,738
	Loans	13,195			4,509			5,280			22,984
	Mortgage servicing rights	12,562			—			—			12,562
	Other assets	7,456			316			52			7,824
	Total assets	53,649			5,817			10,132			69,598
	Short-term borrowings	—			—			3,141			3,141
	Accrued expenses and other liabilities	848			49		-2	1			898
	Long-term debt	2,585			1,628		-2	4,990			9,203
	Total liabilities	3,433			1,677			8,132			13,242
	Noncontrolling interests	—			103			—			103
	Net assets	$	50,216		4,037			2,000			56,253
	-1	Excludes certain debt securities related to loans serviced for the Federal National Mortgage Association (FNMA), Federal Home Loan Mortgage Corporation (FHLMC) and GNMA.
	-2	There were no VIE liabilities with recourse to the general credit of Wells Fargo for the periods presented.
Transactions with Variable Interest Entity	The following tables provide a summary of unconsolidated VIEs with which we have significant continuing involvement, but we are not the primary beneficiary. We do not consider our continuing involvement in an unconsolidated VIE to be significant when it relates to third-party sponsored VIEs for which we were not the transferor (unless we are servicer and have other significant forms of involvement) or if we were the sponsor only or sponsor and servicer but do not have any other forms of significant involvement.
	Significant continuing involvement includes transactions where we were the sponsor or transferor and have other significant forms of involvement. Sponsorship includes transactions with unconsolidated VIEs where we solely or materially participated in the initial design or structuring of the entity or marketing of the transaction to investors. When we transfer assets to a VIE and account for the transfer as a sale, we are considered the transferor. We consider investments in securities (other than those held temporarily in trading), loans, guarantees, liquidity agreements, written options and servicing of collateral to be other forms of involvement that may be significant. We have excluded certain transactions with unconsolidated VIEs from the balances presented in the following table where we have determined that our continuing involvement is not significant due to the temporary nature and size of our variable interests, because we were not the transferor or because we were not involved in the design of the unconsolidated VIEs. We also exclude from the table secured borrowing transactions with unconsolidated VIEs (for information on these transactions, see the Transactions with Consolidated VIEs and Secured Borrowings section in this Note).
					Carrying value - asset (liability)
	(in millions)	Total			Debt and				Servicing			Derivatives			Other			Net
		VIE			equity				assets						commitments			assets
		assets			interests (1)										and
															guarantees
	March 31, 2015
	Residential mortgage loan securitizations:
	Conforming (2)	$	1,244,678		2,870				10,716			—			(562	)		13,024
	Other/nonconforming	30,561			1,530				195			—			(7	)		1,718
	Commercial mortgage securitizations	192,361			7,442				660			250			(23	)		8,329
	Collateralized debt obligations:
	Debt securities	4,628			6				—			160			(102	)		64
	Loans (3)	5,105			4,981				—			—			—			4,981
	Asset-based finance structures	17,341			11,881				—			(75	)		—			11,806
	Tax credit structures	23,688			8,007				—			—			(2,690	)		5,317
	Collateralized loan obligations	1,672			488				—			—			—			488
	Investment funds	2,149			49				—			—			—			49
	Other (4)	12,300			696				18			(23	)		(6	)		685
	Total	$	1,534,483		37,950				11,589			312			(3,390	)		46,461
					Maximum exposure to loss
					Debt and				Servicing			Derivatives			Other			Total
					equity				assets						commitments			exposure
					interests (1)										and
															guarantees
	Residential mortgage loan securitizations:
	Conforming				$	2,870			10,716			—			2,215			15,801
	Other/nonconforming				1,530				195			—			347			2,072
	Commercial mortgage securitizations				7,442				660			250			6,209			14,561
	Collateralized debt obligations:
	Debt securities				6				—			160			102			268
	Loans (3)				4,981				—			—			—			4,981
	Asset-based finance structures				11,881				—			91			658			12,630
	Tax credit structures				8,007				—			—			774			8,781
	Collateralized loan obligations				488				—			—			—			488
	Investment funds				49				—			—			—			49
	Other (4)				696				18			122			157			993
	Total				$	37,950			11,589			623			10,462			60,624
	(continued on following page)
	(continued from previous page)
					Carrying value - asset (liability)
	(in millions)	Total			Debt and				Servicing			Derivatives			Other			Net
		VIE			equity				assets						commitments			assets
		assets			interests (1)										and
															guarantees
	December 31, 2014
	Residential mortgage loan securitizations:
	Conforming (2)	$	1,268,200		2,846				11,684			—			(581	)		13,949
	Other/nonconforming	32,213			1,644				209			—			(8	)		1,845
	Commercial mortgage securitizations	196,510			8,756				650			251			(32	)		9,625
	Collateralized debt obligations:
	Debt securities	5,039			11				—			163			(105	)		69
	Loans (3)	5,347			5,221				—			—			—			5,221
	Asset-based finance structures	18,954			13,044				—			(71	)		—			12,973
	Tax credit structures	22,859			7,809				—			—			(2,585	)		5,224
	Collateralized loan obligations	1,251			518				—			—			—			518
	Investment funds	2,764			49				—			—			—			49
	Other (4)	12,912			747				19			(18	)		(5	)		743
	Total	$	1,566,049		40,645				12,562			325			(3,316	)		50,216
					Maximum exposure to loss
					Debt and				Servicing			Derivatives			Other			Total
					equity				assets						commitments			exposure
					interests (1)										and
						guarantees
Residential mortgage loan securitizations:
Conforming				$	2,846			11,684			—			2,507			17,037
Other/nonconforming				1,644				209			—			345			2,198
Commercial mortgage securitizations				8,756				650			251			5,715			15,372
Collateralized debt obligations:
Debt securities				11				—			163			105			279
Loans (3)				5,221				—			—			—			5,221
Asset-based finance structures				13,044				—			89			656			13,789
Tax credit structures				7,809				—			—			725			8,534
Collateralized loan obligations				518				—			—			38			556
Investment funds				49				—			—			—			49
Other (4)				747				19			150			156			1,072
Total				$	40,645			12,562			653			10,247			64,107
-1	Includes total equity interests of $8.2 billion and $8.1 billion at March 31, 2015, and December 31, 2014, respectively. Also includes debt interests in the form of both loans and securities. Excludes certain debt securities held related to loans serviced for FNMA, FHLMC and GNMA.
-2	Excludes assets and related liabilities with a recorded carrying value on our balance sheet of $1.1 billion and $1.7 billion at March 31, 2015, and December 31, 2014, respectively, for certain delinquent loans that are eligible for repurchase primarily from GNMA loan securitizations. The recorded carrying value represents the amount that would be payable if the Company was to exercise the repurchase option. The carrying amounts are excluded from the table because the loans eligible for repurchase do not represent interests in the VIEs.
-3	Represents senior loans to trusts that are collateralized by asset-backed securities. The trusts invest primarily in senior tranches from a diversified pool of primarily U.S. asset securitizations, of which all are current and 71% and 70% were rated as investment grade by the primary rating agencies at March 31, 2015, and December 31, 2014, respectively. These senior loans are accounted for at amortized cost and are subject to the Company’s allowance and credit charge-off policies.
-4	Includes structured financing and credit-linked note structures. Also contains investments in auction rate securities (ARS) issued by VIEs that we do not sponsor and, accordingly, are unable to obtain the total assets of the entity.
Cash flows with securitization trusts	The following table presents the cash flows for our transfers accounted for as sales.
		2015						2014
	(in millions)	Mortgage			Other			Mortgage			Other
		loans			financial			loans			financial
					assets						assets
	Quarter ended March 31,
	Proceeds from securitizations and whole loan sales	$	41,909		21			37,614			—
	Fees from servicing rights retained	935			2			1,028			2
	Cash flows from other interests held (1)	266			12			293			21
	Repurchases of assets/loss reimbursements (2):
	Non-agency securitizations and whole loan transactions	6			—			3			—
	Agency securitizations (3)	62			—			76			—
	Servicing advances, net of repayments	$	(100	)	—			(273	)		—
	-1	Cash flows from other interests held include principal and interest payments received on retained bonds and excess cash flows received on interest-only strips.
	-2	Consists of cash paid to repurchase loans from investors and cash paid to investors to reimburse them for losses on individual loans that are already liquidated. In addition, during first quarter 2014 we paid $78 million to third-party investors to settle repurchase liabilities on pools of loans. There were no first quarter 2015 loan pool settlements.
	-3	Represent loans repurchased from GNMA, FNMA, and FHLMC under representation and warranty provisions included in our loan sales contracts. First quarter 2015 and 2014 exclude $3.3 billion and $4.1 billion, respectively, in delinquent insured/guaranteed loans that we service and have exercised our option to purchase out of GNMA pools. These loans are predominantly insured by the FHA or guaranteed by the VA.
Key Assumptions To Measure Mortgage Servicing Assets At Date Of Securitization	We used the following key weighted-average assumptions to measure residential mortgage servicing rights at the date of securitization:
		Residential mortgage
		servicing rights
		2015			2014
	Quarter ended March 31,
	Prepayment speed (1)	13		%	12.1
	Discount rate	7.5			7.8
	Cost to service ($ per loan) (2)	$	237		230
	-1	The prepayment speed assumption for residential mortgage servicing rights includes a blend of prepayment speeds and default rates. Prepayment speed assumptions are influenced by mortgage interest rate inputs as well as our estimation of drivers of borrower behavior.
	-2	Includes costs to service and unreimbursed foreclosure costs, which can vary period to period depending on the mix of modified government-guaranteed loans sold to GNMA.
Key Assumptions To Measure Mortgage Servicing Rights And Other Interests Held At Balance Sheet Date	The following table provides key economic assumptions and the sensitivity of the current fair value of residential mortgage servicing rights and other retained interests to immediate adverse changes in those assumptions. “Other interests held” relate predominantly to residential and commercial mortgage loan securitizations. Residential mortgage-backed securities retained in securitizations issued through GSEs, such as FNMA, FHLMC and GNMA, are excluded from the table because these securities have a remote risk of credit loss due to the GSE guarantee. These securities also have economic characteristics similar to GSE mortgage-backed securities that we purchase, which are not included in the table. Subordinated interests include only those bonds whose credit rating was below AAA by a major rating agency at issuance. Senior interests include only those bonds whose credit rating was AAA by a major rating agency at issuance. The information presented excludes trading positions held in inventory.
					Other interests held
		Residential			Interest-only			Consumer				Commercial (2)
		mortgage			strips
		servicing
	($ in millions, except cost to service amounts)	rights (1)						Subordinated				Subordinated			Senior
								bonds				bonds			bonds
	Fair value of interests held at March 31, 2015	$	11,739		122			36				295			555
	Expected weighted-average life (in years)	5.4			3.8			5.3				2.7			6
	Key economic assumptions:
	Prepayment speed assumption (3)	13.2		%	12			8.1
	Decrease in fair value from:
	10% adverse change	$	715		2			—
	25% adverse change	1,695			6			—
	Discount rate assumption	7.4		%	15.4			3.6				4.4			2.4
	Decrease in fair value from:
	100 basis point increase	$	563		3			2				7			28
	200 basis point increase	1,072			5			3				14			55
	Cost to service assumption ($ per loan)	174
	Decrease in fair value from:
	10% adverse change	559
	25% adverse change	1,397
	Credit loss assumption							0.3		%		3.9			—
	Decrease in fair value from:
	10% higher losses							$	—			1			—
	25% higher losses							—				7			—
	Fair value of interests held at December 31, 2014	$	12,738		117			36				294			546
	Expected weighted-average life (in years)	5.7			3.9			5.5				2.9			6.2
	Key economic assumptions:
	Prepayment speed assumption (3)	12.5		%	11.4			7.1
	Decrease in fair value from:
	10% adverse change	$	738		2			—
	25% adverse change	1,754			6			—
	Discount rate assumption	7.6		%	18.7			3.9				4.7			2.8
	Decrease in fair value from:
	100 basis point increase	$	617		2			2				8			29
	200 basis point increase	1,178			4			3				15			55
	Cost to service assumption ($ per loan)	179
	Decrease in fair value from:
	10% adverse change	579
	25% adverse change	1,433
	Credit loss assumption							0.4		%		4.1			—
	Decrease in fair value from:
	10% higher losses							$	—			3			—
	25% higher losses							—				10			—
	-1	See narrative following this table for a discussion of commercial mortgage servicing rights.
	-2	Prepayment speed assumptions do not significantly impact the value of commercial mortgage securitization bonds as the underlying commercial mortgage loans experience significantly lower prepayments due to certain contractual restrictions, impacting the borrower’s ability to prepay the mortgage.
	-3	The prepayment speed assumption for residential mortgage servicing rights includes a blend of prepayment speeds and default rates. Prepayment speed assumptions are influenced by mortgage interest rate inputs as well as our estimation of drivers of borrower behavior.
Principal Balances - Off-Balance Sheet Securitized Loans	The following table presents information about the principal balances of off-balance sheet loans that were sold or securitized, including residential mortgage loans sold to FNMA, FHLMC, GNMA and other investors, for which we have some form of continuing involvement (primarily servicer). Delinquent loans include loans 90 days or more past due and loans in bankruptcy, regardless of delinquency status. For loans sold or securitized where servicing is our only form of continuing involvement, we would only experience a loss if we were required to repurchase a delinquent loan or foreclosed asset due to a breach in representations and warranties associated with our loan sale or servicing contracts.
														Net charge-offs
		Total loans						Delinquent loans and foreclosed assets (1)						Quarter ended
		Mar 31,			Dec 31,			Mar 31,			Dec 31,			Mar 31,
	(in millions)	2015			2014			2015			2014			2015			2014
	Commercial:
	Real estate mortgage	$	110,560		114,081			8,051			7,949			52			634
	Total commercial	110,560			114,081			8,051			7,949			52			634
	Consumer:
	Real estate 1-4 family first mortgage	1,296,484			1,322,136			26,477			28,639			205			144
	Real estate 1-4 family junior lien mortgage	—			1			—			—			—			—
	Other revolving credit and installment	1,553			1,599			70			75			—			—
	Total consumer	1,298,037			1,323,736			26,547			28,714			205			144
	Total off-balance sheet sold or securitized loans (2)	$	1,408,597		1,437,817			34,598			36,663			257			778
	-1	Includes $5.2 billion and $3.3 billion of commercial foreclosed assets and $2.6 billion and $2.7 billion of consumer foreclosed assets at March 31, 2015, and December 31, 2014, respectively.
	-2	At March 31, 2015, and December 31, 2014, the table includes total loans of $1.3 trillion at both dates and delinquent loans of $15.9 billion and $16.5 billion, respectively for FNMA, FHLMC and GNMA. Net charge-offs exclude loans sold to FNMA, FHLMC and GNMA as we do not service or manage the underlying real estate upon foreclosure and, as such, do not have access to net charge-off information.
Transactions With Consolidated Variable Interest Entities	The following table presents a summary of financial assets and liabilities for asset transfers accounted for as secured borrowings and involvements with consolidated VIEs. “Assets” are presented using GAAP measurement methods, which may include fair value, credit impairment or other adjustments, and therefore in some instances will differ from “Total VIE assets.” For VIEs that obtain exposure synthetically through derivative instruments, the remaining notional amount of the derivative is included in “Total VIE assets.” On the consolidated balance sheet, we separately disclose the consolidated assets of certain VIEs that can only be used to settle the liabilities of those VIEs.
					Carrying value
	(in millions)	Total VIE			Assets			Liabilities			Noncontrolling			Net assets
		assets									interests
	March 31, 2015
	Secured borrowings:
	Municipal tender option bond securitizations	$	4,355		3,858			(2,514	)		—			1,344
	Commercial real estate loans	181			181			—			—			181
	Residential mortgage securitizations	4,651			4,887			(4,764	)		—			123
	Total secured borrowings	9,187			8,926			(7,278	)		—			1,648
	Consolidated VIEs:
	Nonconforming residential mortgage loan securitizations	4,841			4,296			(1,452	)		—			2,844
	Commercial real estate loans	529			529			—			—			529
	Structured asset finance	46			46			(24	)		—			22
	Investment funds	810			809			(1	)		—			808
	Other	423			368			(133	)		(111	)		124
	Total consolidated VIEs	6,649			6,048			(1,610	)		(111	)		4,327
	Total secured borrowings and consolidated VIEs	$	15,836		14,974			(8,888	)		(111	)		5,975
	December 31, 2014
	Secured borrowings:
	Municipal tender option bond securitizations	$	5,422		4,837			(3,143	)		—			1,694
	Commercial real estate loans	250			250			(63	)		—			187
	Residential mortgage securitizations	4,804			5,045			(4,926	)		—			119
	Total secured borrowings	10,476			10,132			(8,132	)		—			2,000
	Consolidated VIEs:
	Nonconforming residential mortgage loan securitizations	5,041			4,491			(1,509	)		—			2,982
	Structured asset finance	47			47			(23	)		—			24
	Investment funds	904			904			(2	)		—			902
	Other	431			375			(143	)		(103	)		129
	Total consolidated VIEs	6,423			5,817			(1,677	)		(103	)		4,037
	Total secured borrowings and consolidated VIEs	$	16,899		15,949			(9,809	)		(103	)		6,037

Mortgage_Banking_Activities_Ta

Mortgage Banking Activities (Tables)	3 Months Ended
	Mar. 31, 2015
Mortgage Banking Activities [Abstract]
Changes In Mortgage Servicing Rights Carried at Fair Value	The changes in MSRs measured using the fair value method were:
		Quarter ended March 31,
	(in millions)	2015			2014
	Fair value, beginning of period	$	12,738		15,580
	Servicing from securitizations or asset transfers	308			289
	Sales	(1		)	—
	Net additions	307			289
	Changes in fair value:
	Due to changes in valuation model inputs or assumptions:
	Mortgage interest rates (1)	(572		)	(509	)
	Servicing and foreclosure costs (2)	(18		)	(34	)
	Prepayment estimates and other (3)	(183		)	102
	Net changes in valuation model inputs or assumptions	(773		)	(441	)
	Other changes in fair value (4)	(533		)	(475	)
	Total changes in fair value	(1,306		)	(916	)
	Fair value, end of period	$	11,739		14,953
	-1	Includes prepayment speed changes as well as other valuation changes due to changes in mortgage interest rates (such as changes in estimated interest earned on custodial deposit balances).
	-2	Includes costs to service and unreimbursed foreclosure costs.
	-3	Represents changes driven by other valuation model inputs or assumptions including prepayment speed estimation changes and other assumption updates. Prepayment speed estimation changes are influenced by observed changes in borrower behavior and other external factors that occur independent of interest rate changes.
	-4	Represents changes due to collection/realization of expected cash flows over time.
Changes In Amortized Mortgage Servicing Rights	The changes in amortized MSRs were:
		Quarter ended March 31,
	(in millions)	2015			2014
	Balance, beginning of period	$	1,242		1,229
	Purchases	22			40
	Servicing from securitizations or asset transfers	50			14
	Amortization	(62		)	(64	)
	Balance, end of period (1)	$	1,252		1,219
	Fair value of amortized MSRs:
	Beginning of period	$	1,637		1,575
	End of period	1,522			1,624
	-1	Commercial amortized MSRs are evaluated for impairment purposes by the following risk strata: agency (GSEs) and non-agency. There was no valuation allowance recorded for the periods presented on the commercial amortized MSRs.
Components of Managed Servicing Portfolio	We present the components of our managed servicing portfolio in the following table at unpaid principal balance for loans serviced and subserviced for others and at book value for owned loans serviced.
	(in billions)	Mar 31, 2015			Dec 31, 2014
	Residential mortgage servicing:
	Serviced for others	$	1,374		1,405
	Owned loans serviced	344			342
	Subserviced for others	5			5
	Total residential servicing	1,723			1,752
	Commercial mortgage servicing:
	Serviced for others	461			456
	Owned loans serviced	112			112
	Subserviced for others	7			7
	Total commercial servicing	580			575
	Total managed servicing portfolio	$	2,303		2,327
	Total serviced for others	$	1,835		1,861
	Ratio of MSRs to related loans serviced for others	0.71		%	0.75	%
Components of Mortgage Banking Noninterest Income	The components of mortgage banking noninterest income were:
		Quarter ended March 31,
	(in millions)	2015			2014
	Servicing income, net:
	Servicing fees:
	Contractually specified servicing fees	$	1,020		1,082
	Late charges	53			56
	Ancillary fees	71			80
	Unreimbursed direct servicing costs (1)	(134		)	(148	)
	Net servicing fees	1,010			1,070
	Changes in fair value of MSRs carried at fair value:
	Due to changes in valuation model inputs or assumptions (2)	(773		)	(441	)
	Other changes in fair value (3)	(533		)	(475	)
	Total changes in fair value of MSRs carried at fair value	(1,306		)	(916	)
	Amortization	(62		)	(64	)
	Net derivative gains (losses) from economic hedges (4)	881			848
	Total servicing income, net	523			938
	Net gains on mortgage loan origination/sales activities	1,024			572
	Total mortgage banking noninterest income	$	1,547		1,510
	Market-related valuation changes to MSRs, net of hedge results (2) + (4)	$	108		407
	-1	Primarily associated with foreclosure expenses and unreimbursed interest advances to investors.
	-2	Refer to the changes in fair value of MSRs table in this Note for more detail.
	-3	Represents changes due to collection/realization of expected cash flows over time.
	-4	Represents results from economic hedges used to hedge the risk of changes in fair value of MSRs. See Note 12 (Derivatives Not Designated as Hedging Instruments) for additional discussion and detail.
Liability for Mortgage Loan Repurchase Losses	The table below summarizes the changes in our liability for mortgage loan repurchase losses. This liability is in “Accrued expenses and other liabilities” in our consolidated balance sheet and the provision for repurchase losses reduces net gains on mortgage loan origination/sales activities in “Mortgage banking” in our consolidated income statement.
	Because of the uncertainty in the various estimates underlying the mortgage repurchase liability, there is a range of losses in excess of the recorded mortgage repurchase liability that is reasonably possible. The estimate of the range of possible loss for representations and warranties does not represent a probable loss, and is based on currently available information, significant judgment, and a number of assumptions that are subject to change. The high end of this range of reasonably possible losses in excess of our recorded liability was $936 million at March 31, 2015, and was determined based upon modifying the assumptions (particularly to assume significant changes in investor repurchase demand practices) utilized in our best estimate of probable loss to reflect what we believe to be the high end of reasonably possible adverse assumptions.
		Quarter ended March 31,
	(in millions)	2015			2014
	Balance, beginning of period	$	615		899
	Provision for repurchase losses:
	Loan sales	10			10
	Change in estimate (1)	(26		)	(4	)
	Total additions (reductions)	(16		)	6
	Losses	(13		)	(106	)
	Balance, end of period	$	586		799
	-1	Results from changes in investor demand, mortgage insurer practices, credit and the financial stability of correspondent lenders.

Intangible_Assets_Tables

Intangible Assets (Tables)	3 Months Ended
	Mar. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Gross Carrying Value of Intangible Assets And Accumulated Amortization	The gross carrying value of intangible assets and accumulated amortization was:
		March 31, 2015					December 31, 2014
	(in millions)	Gross		Accumulated		Net	Gross	Accumulated		Net
		carrying		amortization		carrying	carrying	amortization		carrying
		value				value	value			value
	Amortized intangible assets (1):
	MSRs (2)	$	2,975	(1,723	)	1,252	2,906	(1,664	)	1,242
	Core deposit intangibles	12,834		(9,529	)	3,305	12,834	(9,273	)	3,561
	Customer relationship and other intangibles	3,179		(2,379	)	800	3,179	(2,322	)	857
	Total amortized intangible assets	$	18,988	(13,631	)	5,357	18,919	(13,259	)	5,660
	Unamortized intangible assets:
	MSRs (carried at fair value) (2)	$	11,739				12,738
	Goodwill	25,705					25,705
	Trademark	14					14
	-1	Excludes fully amortized intangible assets.
	-2	See Note 8 (Mortgage Banking Activities) for additional information on MSRs.
Amortization Expense for Intangible Assets	The following table provides the current year and estimated future amortization expense for amortized intangible assets. We based our projections of amortization expense shown below on existing asset balances at March 31, 2015. Future amortization expense may vary from these projections.
	(in millions)	Amortized MSRs		Core deposit		Customer	Total
				intangibles		relationship and
						other
						intangibles
	Three months ended March 31, 2015 (actual)	$	62	256		57	375
	Estimate for the remainder of 2015	$	189	766		169	1,124
	Estimate for year ended December 31,
	2016	213		919		211	1,343
	2017	167		851		197	1,215
	2018	137		769		188	1,094
	2019	121		—		12	133
	2020	107		—		8	115
Allocation of Goodwill to Operating Segments	The following table shows the allocation of goodwill to our reportable operating segments for purposes of goodwill impairment testing.
	(in millions)	Community		Wholesale		Wealth,	Consolidated
		Banking		Banking		Brokerage and	Company
						Retirement
	December 31, 2013 and March 31, 2014	$	17,922	7,344		371	25,637
	December 31, 2014 and March 31, 2015	$	17,914	7,420		371	25,705

Guarantees_Pledged_Assets_and_1

Guarantees, Pledged Assets and Collateral (Tables)	3 Months Ended
	Mar. 31, 2015
Guarantees [Abstract]
Schedule of Guarantor Obligations	The following table shows carrying value, maximum exposure to loss on our guarantees and the related non-investment grade amounts.
		31-Mar-15
					Maximum exposure to loss
	(in millions)	Carrying			Expires in		Expires after	Expires after	Expires	Total	Non-
		value			one year		one year	three years	after five		investment
					or less		through	through	years		grade
							three years	five years
	Standby letters of credit (1)	$	57		16,267		10,695	5,644	640	33,246	8,433
	Securities lending and other indemnifications (2)	—			—		—	—	6,153	6,153	—
	Written put options (3)	611			8,421		5,642	3,081	2,308	19,452	8,399
	Loans and MHFS sold with recourse (4)	63			115		641	702	5,716	7,174	4,367
	Factoring guarantees (5)	—			2,043		—	—	—	2,043	2,043
	Other guarantees	24			42		52	22	2,197	2,313	69
	Total guarantees	$	755		26,888		17,030	9,449	17,014	70,381	23,311
		31-Dec-14
					Maximum exposure to loss
	(in millions)	Carrying			Expires in		Expires after	Expires after	Expires	Total	Non-
		value			one year		one year	three years	after five		investment
					or less		through	through	years		grade
							three years	five years
	Standby letters of credit (1)	$	41		16,271		10,269	6,295	645	33,480	8,447
	Securities lending and other indemnifications (2)	—			—		2	2	5,948	5,952	—
	Written put options (3)	469			7,644		5,256	2,822	2,409	18,131	7,902
	Loans and MHFS sold with recourse (4)	72			131		486	822	5,386	6,825	3,945
	Factoring guarantees (5)	—			3,460		—	—	—	3,460	3,460
	Other guarantees	24			9		85	22	2,158	2,274	69
	Total guarantees	$	606		27,515		16,098	9,963	16,546	70,122	23,823
	-1	Total maximum exposure to loss includes direct pay letters of credit (DPLCs) of $14.4 billion and $15.0 billion at March 31, 2015 and December 31, 2014, respectively. We issue DPLCs to provide credit enhancements for certain bond issuances. Beneficiaries (bond trustees) may draw upon these instruments to make scheduled principal and interest payments, redeem all outstanding bonds because a default event has occurred, or for other reasons as permitted by the agreement. We also originate multipurpose lending commitments under which borrowers have the option to draw on the facility in one of several forms, including as a standby letter of credit. Total maximum exposure to loss includes the portion of these facilities for which we have issued standby letters of credit under the commitments.
	-2	Includes $33 million and $211 million at March 31, 2015 and December 31, 2014, respectively, in debt and equity securities lent from participating institutional client portfolios to third-party borrowers. Also includes indemnifications provided to certain third-party clearing agents. Outstanding customer obligations under these arrangements were $1.1 billion and $950 million with related collateral of $5.4 billion and $5.6 billion at March 31, 2015 and December 31, 2014, respectively. Estimated maximum exposure to loss was $6.1 billion and $5.7 billion as of the same periods, respectively.
	-3	Written put options, which are in the form of derivatives, are also included in the derivative disclosures in Note 12 (Derivatives).
	-4	Represent recourse provided, predominantly to the GSEs, on loans sold under various programs and arrangements. Under these arrangements, we repurchased $1 million of loans associated with these agreements in both first quarter 2015 and 2014.
	-5	Consists of guarantees made under certain factoring arrangements to purchase trade receivables from third parties, generally upon their request, if receivable debtors default on their payment obligations.
Significant Components of Assets Pledged	The following table provides the total carrying amount of pledged assets by asset type. The table excludes pledged consolidated VIE assets of $6.0 billion and $5.8 billion at March 31, 2015, and December 31, 2014, respectively, which can only be used to settle the liabilities of those entities. The table also excludes $8.9 billion and $10.1 billion in assets pledged in transactions accounted for as secured borrowings at March 31, 2015 and December 31, 2014, respectively. See Note 7 (Securitizations and Variable Interest Entities) for additional information on consolidated VIE assets and secured borrowings.
	(in millions)	Mar. 31,			Dec. 31,
		2015			2014
	Trading assets and other (1)	$	69,685		49,685
	Investment securities (2)	94,333			101,997
	Mortgages held for sale and Loans (3)	426,953			418,338
	Total pledged assets	$	590,971		570,020
	-1	Represent assets pledged to collateralize repurchase agreements and other securities financings. Balance includes $69.2 billion and $49.4 billion at March 31, 2015, and December 31, 2014, respectively, under agreements that permit the secured parties to sell or repledge the collateral.
	-2	Includes carrying value of $5.8 billion and $6.6 billion (fair value of $5.8 billion and $6.8 billion) in collateral for repurchase agreements at March 31, 2015, and December 31, 2014, respectively, which are pledged under agreements that do not permit the secured parties to sell or repledge the collateral. Also includes $2.7 billion and $164 million in collateral pledged under repurchase agreements at March 31, 2015, and December 31, 2014, respectively, that permit the secured parties to sell or repledge the collateral.
	-3	Includes mortgages held for sale of $11.1 billion and $8.7 billion at March 31, 2015 and December 31, 2014, respectively. Balance consists of mortgages held for sale and loans that are pledged under agreements that do not permit the secured parties to sell or repledge the collateral. Amounts exclude $1.1 billion and $1.7 billion at March 31, 2015 and December 31, 2014, respectively, of pledged loans recorded on our balance sheet representing certain delinquent loans that are eligible for repurchase primarily from GNMA loan securitizations. See Note 7 (Securitizations and Variable Interest Entities) for additional information.
Offsetting of Resale and Repurchase Agreements and Securities Borrowing and Lending	The table below presents resale and repurchase agreements subject to master repurchase agreements (MRA) and securities borrowing and lending agreements subject to master securities lending agreements (MSLA). We account for transactions subject to these agreements as collateralized financings, and those with a single counterparty are presented net on our balance sheet, provided certain criteria are met that permit balance sheet netting. Most transactions subject to these agreements do not meet those criteria and thus are not eligible for balance sheet netting.
	Collateral we pledged consists of non-cash instruments, such as securities or loans, and is not netted on the balance sheet against the related collateralized liability. Collateral we received includes securities or loans and is not recognized on our balance sheet. Collateral received or pledged may be increased or decreased over time to maintain certain contractual thresholds as the assets underlying each arrangement fluctuate in value. Generally, these agreements require collateral to exceed the asset or liability recognized on the balance sheet. The following table includes the amount of collateral pledged or received related to exposures subject to enforceable MRAs or MSLAs. While these agreements are typically over-collateralized, U.S. GAAP requires disclosure in this table to limit the amount of such collateral to the amount of the related recognized asset or liability for each counterparty.
	In addition to the amounts included in the table below, we also have balance sheet netting related to derivatives that is disclosed within Note 12 (Derivatives).
	(in millions)	Mar 31,			Dec 31,
		2015			2014
	Assets:
	Resale and securities borrowing agreements
	Gross amounts recognized	$	69,122		58,148
	Gross amounts offset in consolidated balance sheet (1)	(14,247		)	(6,477	)
	Net amounts in consolidated balance sheet (2)	54,875			51,671
	Collateral not recognized in consolidated balance sheet (3)	(54,592		)	(51,624	)
	Net amount (4)	$	283		47
	Liabilities:
	Repurchase and securities lending agreements
	Gross amounts recognized	$	77,643		56,583
	Gross amounts offset in consolidated balance sheet (1)	(14,247		)	(6,477	)
	Net amounts in consolidated balance sheet (5)	63,396			50,106
	Collateral pledged but not netted in consolidated balance sheet (6)	(62,540		)	(49,713	)
	Net amount (7)	$	856		393
	-1	Represents recognized amount of resale and repurchase agreements with counterparties subject to enforceable MRAs or MSLAs that have been offset in the consolidated balance sheet.
	-2	At March 31, 2015 and December 31, 2014, includes $40.1 billion and $36.8 billion, respectively, classified on our consolidated balance sheet in Federal funds sold, securities purchased under resale agreements and other short-term investments and $14.8 billion and $14.9 billion, respectively, in Loans.
	-3	Represents the fair value of collateral we have received under enforceable MRAs or MSLAs, limited for table presentation purposes to the amount of the recognized asset due from each counterparty. At March 31, 2015 and December 31, 2014, we have received total collateral with a fair value of $76.4 billion and $64.5 billion, respectively, all of which, we have the right to sell or repledge. These amounts include securities we have sold or repledged to others with a fair value of $52.7 billion at March 31, 2015 and $40.8 billion at December 31, 2014.
	-4	Represents the amount of our exposure that is not collateralized and/or is not subject to an enforceable MRA or MSLA.
	-5	Amount is classified in Short-term borrowings on our consolidated balance sheet.
	-6	Represents the fair value of collateral we have pledged, related to enforceable MRAs or MSLAs, limited for table presentation purposes to the amount of the recognized liability owed to each counterparty. At March 31, 2015 and December 31, 2014, we have pledged total collateral with a fair value of $78.2 billion and $56.5 billion, respectively, of which, the counterparty does not have the right to sell or repledge $6.3 billion as of March 31, 2015 and $6.9 billion as of December 31, 2014.
	-7	Represents the amount of our obligation that is not covered by pledged collateral and/or is not subject to an enforceable MRA or MSLA.

Derivatives_Tables

Derivatives (Tables)	3 Months Ended
	Mar. 31, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Total Notional or Contractual Amounts and Fair Values for Derivatives	The following table presents the total notional or contractual amounts and fair values for our derivatives. Derivative transactions can be measured in terms of the notional amount, but this amount is not recorded on the balance sheet and is not, when viewed in isolation, a meaningful measure of the risk profile of the instruments. The notional amount is generally not exchanged but is used only as the basis on which interest and other payments are determined. Derivatives designated as qualifying hedging instruments and economic hedges are recorded on the balance sheet at fair value in other assets or other liabilities. Customer accommodation, trading and other derivatives are recorded on the balance sheet at fair value in trading assets, other assets or other liabilities.
		March 31, 2015										December 31, 2014
		Notional or							Fair value			Notional or					Fair value
		contractual										contractual
	(in millions)	amount			Asset				Liability			amount		Asset			Liability
					derivatives				derivatives					derivatives			derivatives
	Derivatives designated as hedging instruments
	Interest rate contracts (1)	$	161,185		8,349				2,956			148,967		6,536			2,435
	Foreign exchange contracts (1)	26,369			688				2,739			26,778		752			1,347
	Total derivatives designated as qualifying hedging instruments				9,037				5,695					7,288			3,782
	Derivatives not designated as hedging instruments
	Economic hedges:
	Interest rate contracts (2)	238,419			775				643			221,527		697			487
	Equity contracts	5,959			432				50			5,219		367			96
	Foreign exchange contracts	16,722			462				58			14,405		275			28
	Subtotal				1,669				751					1,339			611
	Customer accommodation, trading and other derivatives:
	Interest rate contracts	4,886,284			74,070				74,584			4,378,767		56,465			57,137
	Commodity contracts	76,664			6,879				7,523			88,640		7,461			7,702
	Equity contracts	139,526			8,698				6,733			138,422		8,638			6,942
	Foreign exchange contracts	256,071			8,601				8,819			253,742		6,377			6,452
	Credit contracts - protection sold	13,207			172				851			12,304		151			943
	Credit contracts - protection purchased	17,936			710				194			16,659		755			168
	Other contracts	1,954			—				52			1,994		—			44
	Subtotal				99,130				98,756					79,847			79,388
	Total derivatives not designated as hedging instruments				100,799				99,507					81,186			79,999
	Total derivatives before netting				109,836				105,202					88,474			83,781
	Netting (3)				(88,129		)		(86,777	)				(65,869	)		(65,043	)
	Total				$	21,707			18,425					22,605			18,738
	-1	Notional amounts presented exclude $1.9 billion of interest rate contracts at both March 31, 2015 and December 31, 2014, for certain derivatives that are combined for designation as a hedge on a single instrument. The notional amount for foreign exchange contracts at March 31, 2015, and December 31, 2014 excludes $2.4 billion and $2.7 billion, respectively, for certain derivatives that are combined for designation as a hedge on a single instrument.
	-2	Includes economic hedge derivatives used to hedge the risk of changes in the fair value of residential MSRs, MHFS, loans, derivative loan commitments and other interests held.
	-3	Represents balance sheet netting of derivative asset and liability balances, related cash collateral and portfolio level counterparty valuation adjustments. See the next table in this Note for further information.
Balance Sheet Offsetting of Derivative Assets and Liabilities	The following table provides information on the gross fair values of derivative assets and liabilities, the balance sheet netting adjustments and the resulting net fair value amount recorded on our balance sheet, as well as the non-cash collateral associated with such arrangements. We execute the majority of our derivative transactions under master netting arrangements. We reflect all derivative balances and related cash collateral subject to enforceable master netting arrangements on a net basis within the balance sheet. The “Gross amounts recognized” column in the following table includes $90.0 billion and $95.9 billion of gross derivative assets and liabilities, respectively, at March 31, 2015, and $69.6 billion and $75.0 billion, respectively, at December 31, 2014, with counterparties subject to enforceable master netting arrangements that are carried on the balance sheet net of offsetting amounts. The remaining gross derivative assets and liabilities of $19.8 billion and $9.3 billion, respectively, at March 31, 2015 and $18.9 billion and $8.8 billion, respectively, at December 31, 2014, include those with counterparties subject to master netting arrangements for which we have not assessed the enforceability because they are with counterparties where we do not currently have positions to offset, those subject to master netting arrangements where we have not been able to confirm the enforceability and those not subject to master netting arrangements. As such,we do not net derivative balances or collateral within the balance sheet for these counterparties.
	We determine the balance sheet netting adjustments based on the terms specified within each master netting arrangement. We disclose the balance sheet netting amounts within the column titled “Gross amounts offset in consolidated balance sheet.” Balance sheet netting adjustments are determined at the counterparty level for which there may be multiple contract types. For disclosure purposes, we allocate these adjustments to the contract type for each counterparty proportionally based upon the “Gross amounts recognized” by counterparty. As a result, the net amounts disclosed by contract type may not represent the actual exposure upon settlement of the contracts.Balance sheet netting does not include non-cash collateral that we receive and pledge. For disclosure purposes, we present the fair value of this non-cash collateral in the column titled “Gross amounts not offset in consolidated balance sheet (Disclosure-only netting)” within the table. We determine and allocate the Disclosure-only netting amounts in the same manner as balance sheet netting amounts.
	The “Net amounts” column within the following table represents the aggregate of our net exposure to each counterparty after considering the balance sheet and Disclosure-only netting adjustments. We manage derivative exposure by monitoring the credit risk associated with each counterparty using counterparty specific credit risk limits, using master netting arrangements and obtaining collateral. Derivative contracts executed in over-the-counter markets include bilateral contractual arrangements that are not cleared through a central clearing organization but are typically subject to master netting arrangements. The percentage of our bilateral derivative transactions outstanding at period end in such markets, based on gross fair value, is provided within the following table. Other derivative contracts executed in over-the-counter or exchange-traded markets are settled through a central clearing organization and are excluded from this percentage. In addition to the netting amounts included in the table, we also have balance sheet netting related to resale and repurchase agreements that are disclosed within Note 10 (Guarantees, Pledged Assets and Collateral).
	(in millions)	Gross			Gross amounts			Net amounts in			Gross amounts		Net			Percent
		amounts			offset in			consolidated			not offset in		amounts			exchanged in
		recognized			consolidated			balance			consolidated					over-the-counter
					balance			sheet (2)			balance sheet					market (4)
					sheet (1)						(Disclosure-only
											netting) (3)
	March 31, 2015
	Derivative assets
	Interest rate contracts	$	83,194		(77,500	)		5,694			(877	)	4,817			35	%
	Commodity contracts	6,879			(1,308	)		5,571			(1	)	5,570			29
	Equity contracts	9,130			(2,992	)		6,138			(447	)	5,691			54
	Foreign exchange contracts	9,751			(5,586	)		4,165			(13	)	4,152			98
	Credit contracts-protection sold	172			(117	)		55			—		55			71
	Credit contracts-protection purchased	710			(626	)		84			(2	)	82			100
	Total derivative assets	$	109,836		(88,129	)		21,707			(1,340	)	20,367
	Derivative liabilities
	Interest rate contracts	$	78,183		(73,377	)		4,806			(3,593	)	1,213			31	%
	Commodity contracts	7,523			(1,411	)		6,112			(189	)	5,923			83
	Equity contracts	6,783			(2,511	)		4,272			(334	)	3,938			84
	Foreign exchange contracts	11,616			(8,530	)		3,086			(273	)	2,813			100
	Credit contracts-protection sold	851			(826	)		25			(22	)	3			100
	Credit contracts-protection purchased	194			(122	)		72			(72	)	—			65
	Other contracts	52			—			52			—		52			100
	Total derivative liabilities	$	105,202		(86,777	)		18,425			(4,483	)	13,942
	December 31, 2014
	Derivative assets
	Interest rate contracts	$	63,698		(56,051	)		7,647			(769	)	6,878			45	%
	Commodity contracts	7,461			(1,233	)		6,228			(72	)	6,156			27
	Equity contracts	9,005			(2,842	)		6,163			(405	)	5,758			54
	Foreign exchange contracts	7,404			(4,923	)		2,481			(85	)	2,396			98
	Credit contracts-protection sold	151			(131	)		20			—		20			90
	Credit contracts-protection purchased	755			(689	)		66			(1	)	65			100
	Total derivative assets	$	88,474		(65,869	)		22,605			(1,332	)	21,273
	Derivative liabilities
	Interest rate contracts	$	60,059		(54,394	)		5,665			(4,244	)	1,421			44	%
	Commodity contracts	7,702			(1,459	)		6,243			(33	)	6,210			81
	Equity contracts	7,038			(2,845	)		4,193			(484	)	3,709			82
	Foreign exchange contracts	7,827			(5,511	)		2,316			(270	)	2,046			100
	Credit contracts-protection sold	943			(713	)		230			(199	)	31			100
	Credit contracts-protection purchased	168			(121	)		47			(18	)	29			86
	Other contracts	44			—			44			—		44			100
	Total derivative liabilities	$	83,781		(65,043	)		18,738			(5,248	)	13,490
	-1	Represents amounts with counterparties subject to enforceable master netting arrangements that have been offset in the consolidated balance sheet, including related cash collateral and portfolio level counterparty valuation adjustments. Counterparty valuation adjustments were $313 million and $266 million related to derivative assets and $50 million and $56 million related to derivative liabilities at March 31, 2015 and December 31, 2014, respectively. Cash collateral totaled $6.8 billion and $5.7 billion , netted against derivative assets and liabilities, respectively, at March 31, 2015, and $5.2 billion and $4.6 billion, respectively, at December 31, 2014.
	-2	Net derivative assets of $17.1 billion and $16.9 billion are classified in Trading assets at March 31, 2015 and December 31, 2014, respectively. $4.6 billion and $5.7 billion are classified in Other assets in the consolidated balance sheet at March 31, 2015 and December 31, 2014, respectively. Net derivative liabilities are classified in Accrued expenses and other liabilities in the consolidated balance sheet.
	-3	Represents non-cash collateral pledged and received against derivative assets and liabilities with the same counterparty that are subject to enforceable master netting arrangements. U.S. GAAP does not permit netting of such non-cash collateral balances in the consolidated balance sheet but requires disclosure of these amounts.
	-4	Represents derivatives executed in over-the-counter markets that are not settled through a central clearing organization. Over-the-counter percentages are calculated based on gross amounts recognized as of the respective balance sheet date. The remaining percentage represents derivatives settled through a central clearing organization, which are executed in either over-the-counter or exchange-traded markets.
Net Gains (Losses) Recognized in the Income Statement Related to Derivatives in Fair Value Hedging Relationships	The following table shows the net gains (losses) recognized in the income statement related to derivatives in fair value hedging relationships. The entire derivative gain or loss is included in the assessment of hedge effectiveness for all fair value hedge relationships, except for those involving foreign-currency denominated available-for-sale securities and long-term debt hedged with foreign currency forward derivatives for which the time value component of the derivative gain or loss related to the changes in the difference between the spot and forward price is excluded from the assessment of hedge effectiveness.
		Interest rate									Foreign exchange					Total net
		contracts hedging:									contracts hedging:					gains
																(losses)
																on fair
																value
	(in millions)	Available-			Mortgages			Long-term			Available-		Long-term			hedges
		for-sale			held for			debt			for-sale		debt
		securities			sale						securities
	Quarter ended March 31, 2015
	Net interest income (expense) recognized on derivatives	$	(186	)	(3	)		472			1		61			345
	Gains (losses) recorded in noninterest income
	Recognized on derivatives	(666		)	(13	)		1,258			280		(1,887	)		(1,028	)
	Recognized on hedged item	661			10			(1,150	)		(269	)	1,949			1,201
	Net recognized on fair value hedges (ineffective portion) (1)	$	(5	)	(3	)		108			11		62			173
	Quarter ended March 31, 2014
	Net interest income (expense) recognized on derivatives	$	(175	)	(3	)		448			(2	)	73			341
	Gains (losses) recorded in noninterest income
	Recognized on derivatives	(505		)	(15	)		988			(14	)	74			528
	Recognized on hedged item	497			11			(853	)		11		(74	)		(408	)
	Net recognized on fair value hedges (ineffective portion) (1)	$	(8	)	(4	)		135			(3	)	—			120
	-1	Included $(1) million and $0 million, respectively, for the quarters ended March 31, 2015 and 2014, of the time value component recognized as net interest income (expense) on forward derivatives hedging foreign currency available-for-sale securities and long-term debt that were excluded from the assessment of hedge effectiveness.
Net Gains (Losses) Recognized Related to Derivatives in Cash Flow Hedging Relationships	The following table shows the net gains (losses) recognized related to derivatives in cash flow hedging relationships.
		Quarter ended March 31,
	(in millions)	2015			2014
	Gains (losses) (pre tax) recognized in OCI on derivatives	$	952		44
	Gains (pre tax) reclassified from cumulative OCI into net income (1)	234			106
	Gains (losses) (pre tax) recognized in noninterest income for hedge ineffectiveness (2)	1			—
	-1	See Note 17 (Other Comprehensive Income) for detail on components of net income.
	-2	None of the change in value of the derivatives was excluded from the assessment of hedge effectiveness.
Net Gains (Losses) Recognized in the Income Statement Related to Derivatives not Designated as Hedging Instruments	The following table shows the net gains recognized in the income statement related to derivatives not designated as hedging instruments.
		Quarter ended March 31,
	(in millions)	2015			2014
	Net gains (losses) recognized on economic hedges derivatives:
	Interest rate contracts
	Recognized in noninterest income:
	Mortgage banking (1)	$	647		366
	Other (2)	(64		)	(59	)
	Equity contracts (3)	(20		)	76
	Foreign exchange contracts (2)	648			69
	Subtotal (4)	1,211			452
	Net gains (losses) recognized on customer accommodation, trading and other derivatives:
	Interest rate contracts
	Recognized in noninterest income:
	Mortgage banking (5)	387			290
	Other (6)	(93		)	(391	)
	Commodity contracts (6)	31			50
	Equity contracts (6)	189			(94	)
	Foreign exchange contracts (6)	110			262
	Credit contracts (6)	(8		)	27
	Other (4)(6)	(8		)	(7	)
	Subtotal (4)	608			137
	Net gains recognized related to derivatives not designated as hedging instruments	$	1,819		589
	-1	Predominantly mortgage banking noninterest income including gains (losses) on the derivatives used as economic hedges of MSRs measured at fair value, interest rate lock commitments and mortgages held for sale.
	-2	Predominantly included in other noninterest income.
	-3	Predominantly included in net gains (losses) from equity investments in noninterest income.
	-4	Prior period has been revised to conform with current period presentation.
	-5	Predominantly mortgage banking noninterest income including gains (losses) on interest rate lock commitments.
	-6	Predominantly included in net gains from trading activities in noninterest income.
Details of Sold and Purchased Credit Derivatives	The following table provides details of sold and purchased credit derivatives.
					Notional amount
	(in millions)	Fair value			Protection			Protection			Protection		Net			Other			Range of
		liability			sold (A)			sold -			purchased		protection			protection			maturities
								non-			with		sold			purchased
								investment			identical		(A) - (B)
								grade			underlyings (B)
	March 31, 2015
	Credit default swaps on:
	Corporate bonds	$	15		5,978			2,269			4,457		1,521			2,622			2015 - 2021
	Structured products	586			971			790			572		399			236			2017 - 2052
	Credit protection on:
	Default swap index	—			2,906			427			2,106		800			1,286			2015 - 2020
	Commercial mortgage-backed securities index	230			965			—			747		218			384			2047 - 2052
	Asset-backed securities index	19			51			1			1		50			78			2045 - 2046
	Other	1			2,336			2,336			—		2,336			5,447			2015 - 2025
	Total credit derivatives	$	851		13,207			5,823			7,883		5,324			10,053
	December 31, 2014
	Credit default swaps on:
	Corporate bonds	$	23		6,344			2,904			4,894		1,450			2,831			2015 - 2021
	Structured products	654			1,055			874			608		447			277			2017 - 2052
	Credit protection on:
	Default swap index	—			1,659			292			777		882			1,042			2015 - 2019
	Commercial mortgage-backed securities index	246			1,058			—			608		450			355			2047 - 2063
	Asset-backed securities index	19			52			1			1		51			81			2045 - 2046
	Other	1			2,136			2,136			—		2,136			5,185			2015 - 2025
	Total credit derivatives	$	943		12,304			6,207			6,888		5,416			9,771

Fair_Values_of_Assets_and_Liab1

Fair Values of Assets and Liabilities (Tables)	3 Months Ended
	Mar. 31, 2015
Fair Value Disclosures [Abstract]
Fair Value, Measurements from Brokers or Third Party Pricing Services	The detail by level is shown in the table below. Fair value measurements obtained from brokers or third party pricing services that we have adjusted to determine the fair value recorded in our financial statements are not included in the following table.
		Brokers										Third party pricing services
	(in millions)	Level 1				Level 2			Level 3			Level 1			Level 2		Level 3
	March 31, 2015
	Trading assets (excluding derivatives)	$	—			—			—			—			68		—
	Available-for-sale securities:
	Securities of U.S. Treasury and federal agencies	—				—			—			24,023			6,008		—
	Securities of U.S. states and political subdivisions	—				27			—			—			45,359		59
	Mortgage-backed securities	—				187			—			—			127,606		104
	Other debt securities (1)	—				1,002			626			—			43,676		520
	Total debt securities	—				1,216			626			24,023			222,649		683
	Total marketable equity securities	—				—			—			—			570		—
	Total available-for-sale securities	—				1,216			626			24,023			223,219		683
	Derivatives (trading and other assets)	—				—			—			—			286		—
	Derivatives (liabilities)	—				—			—			—			(281	)	—
	Other liabilities	—				—			—			—			—		—
	December 31, 2014
	Trading assets (excluding derivatives)	$	—			—			—			2			105		—
	Available-for-sale securities:
	Securities of U.S. Treasury and federal agencies	—				—			—			19,899			5,905		—
	Securities of U.S. states and political subdivisions	—				—			—			—			42,666		61
	Mortgage-backed securities	—				152			—			—			135,997		133
	Other debt securities (1)	—				1,035			601			—			41,933		541
	Total debt securities	—				1,187			601			19,899			226,501		735
	Total marketable equity securities	—				—			—			—			569		—
	Total available-for-sale securities	—				1,187			601			19,899			227,070		735
	Derivatives (trading and other assets)	—				1			—			—			290		—
	Derivatives (liabilities)	—				(1	)		—			—			(292	)	—
	Other liabilities	—				—			—			—			(1	)	—
	-1	Includes corporate debt securities, collateralized loan and other debt obligations, asset-backed securities, and other debt securities.
Assets and Liabilities Recorded at Fair Value on a Recurring Basis	The following two tables present the balances of assets and liabilities recorded at fair value on a recurring basis.
	(in millions)	Level 1				Level 2			Level 3			Netting			Total
	March 31, 2015
	Trading assets (excluding derivatives)
	Securities of U.S. Treasury and federal agencies	$	10,161			4,430			—			—			14,591
	Securities of U.S. states and political subdivisions	—				3,034			6			—			3,040
	Collateralized loan and other debt obligations (1)	—				288			381			—			669
	Corporate debt securities	—				8,455			31			—			8,486
	Mortgage-backed securities	—				19,575			—			—			19,575
	Asset-backed securities	—				780			81			—			861
	Equity securities	13,676				122			10			—			13,808
	Total trading securities (2)	23,837				36,684			509			—			61,030
	Other trading assets	—				1,117			64			—			1,181
	Total trading assets (excluding derivatives)	23,837				37,801			573			—			62,211
	Securities of U.S. Treasury and federal agencies	24,023				6,008			—			—			30,031
	Securities of U.S. states and political subdivisions	—				45,400			1,980		-3	—			47,380
	Mortgage-backed securities:
	Federal agencies	—				103,217			—			—			103,217
	Residential	—				8,723			—			—			8,723
	Commercial	—				15,885			104			—			15,989
	Total mortgage-backed securities	—				127,825			104			—			127,929
	Corporate debt securities	83				14,738			312			—			15,133
	Collateralized loan and other debt obligations (4)	—				26,669			1,053		-3	—			27,722
	Asset-backed securities:
	Auto loans and leases	—				33			249		-3	—			282
	Home equity loans	—				567			—			—			567
	Other asset-backed securities	—				3,827			1,206		-3	—			5,033
	Total asset-backed securities	—				4,427			1,455			—			5,882
	Other debt securities	—				22			—			—			22
	Total debt securities	24,106				225,089			4,904			—			254,099
	Marketable equity securities:
	Perpetual preferred securities (5)	482				570			640		-3	—			1,692
	Other marketable equity securities	1,788				24			—			—			1,812
	Total marketable equity securities	2,270				594			640			—			3,504
	Total available-for-sale securities	26,376				225,683			5,544			—			257,603
	Mortgages held for sale	—				16,917			2,098			—			19,015
	Loans held for sale	—				1			—			—			1
	Loans	—				—			5,730			—			5,730
	Mortgage servicing rights (residential)	—				—			11,739			—			11,739
	Derivative assets:
	Interest rate contracts	83				82,639			472			—			83,194
	Commodity contracts	—				6,858			21			—			6,879
	Equity contracts	4,234				3,711			1,185			—			9,130
	Foreign exchange contracts	54				9,697			—			—			9,751
	Credit contracts	—				449			433			—			882
	Netting	—				—			—			(88,129	)	-6	(88,129	)
	Total derivative assets (7)	4,371				103,354			2,111			(88,129	)		21,707
	Other assets	—				—			2,628			—			2,628
	Total assets recorded at fair value	$	54,584			383,756			30,423			(88,129	)		380,634
	Derivative liabilities:
	Interest rate contracts	$	(30	)		(78,119	)		(34	)		—			(78,183	)
	Commodity contracts	—				(7,500	)		(23	)		—			(7,523	)
	Equity contracts	(1,054		)		(4,358	)		(1,371	)		—			(6,783	)
	Foreign exchange contracts	(52		)		(11,564	)		—			—			(11,616	)
	Credit contracts	—				(458	)		(587	)		—			(1,045	)
	Other derivative contracts	—				—			(52	)		—			(52	)
	Netting	—				—			—			86,777		-6	86,777
	Total derivative liabilities (7)	(1,136		)		(101,999	)		(2,067	)		86,777			(18,425	)
	Short sale liabilities:
	Securities of U.S. Treasury and federal agencies	(11,032		)		(1,377	)		—			—			(12,409	)
	Securities of U.S. states and political subdivisions	—				(18	)		—			—			(18	)
	Corporate debt securities	—				(4,552	)		—			—			(4,552	)
	Equity securities	(2,476		)		(3	)		—			—			(2,479	)
	Other securities	—				(316	)		(15	)		—			(331	)
Total short sale liabilities	(13,508		)		(6,266	)		(15	)		—			(19,789	)
Other liabilities (excluding derivatives)	—				—			(27	)		—			(27	)
Total liabilities recorded at fair value	$	(14,644	)		(108,265	)		(2,109	)		86,777			(38,241	)
-1	The entire balance only consists of collateralized loan obligations.
-2	Net gains from trading activities recognized in the income statement for the quarters ended March 31, 2015 and 2014 include $(430) million and $(3) million in net unrealized losses on trading securities held at March 31, 2015 and 2014, respectively.
-3	Balances consist of securities that are mostly investment grade based on ratings received from the ratings agencies or internal credit grades categorized as investment grade if external ratings are not available. The securities are classified as Level 3 due to limited market activity.
-4	Includes collateralized debt obligations of $487 million.
-5	Perpetual preferred securities include ARS and corporate preferred securities. See Note 7 (Securitizations and Variable Interest Entities) for additional information.
-6	Represents balance sheet netting of derivative asset and liability balances, related cash collateral and portfolio level counterparty valuation adjustments. See Note 12 (Derivatives) for additional information.
-7	Derivative assets and derivative liabilities include contracts qualifying for hedge accounting, economic hedges, and derivatives included in trading assets and trading liabilities, respectively.
(continued on following page)
(continued from previous page)
(in millions)	Level 1				Level 2			Level 3			Netting			Total
December 31, 2014
Trading assets (excluding derivatives)
Securities of U.S. Treasury and federal agencies	$	10,506			3,886			—			—			14,392
Securities of U.S. states and political subdivisions	—				1,537			7			—			1,544
Collateralized loan and other debt obligations (1)	—				274			445			—			719
Corporate debt securities	—				7,517			54			—			7,571
Mortgage-backed securities	—				16,273			—			—			16,273
Asset-backed securities	—				776			79			—			855
Equity securities	18,512				38			10			—			18,560
Total trading securities (2)	29,018				30,301			595			—			59,914
Other trading assets	—				1,398			55			—			1,453
Total trading assets (excluding derivatives)	29,018				31,699			650			—			61,367
Securities of U.S. Treasury and federal agencies	19,899				5,905			—			—			25,804
Securities of U.S. states and political subdivisions	—				42,667			2,277		-3	—			44,944
Mortgage-backed securities:
Federal agencies	—				110,089			—			—			110,089
Residential	—				9,245			24			—			9,269
Commercial	—				16,885			109			—			16,994
Total mortgage-backed securities	—				136,219			133			—			136,352
Corporate debt securities	83				14,451			252			—			14,786
Collateralized loan and other debt obligations (4)	—				24,274			1,087		-3	—			25,361
Asset-backed securities:
Auto loans and leases	—				31			245		-3	—			276
Home equity loans	—				662			—			—			662
Other asset-backed securities	—				4,189			1,372		-3	—			5,561
Total asset-backed securities	—				4,882			1,617			—			6,499
Other debt securities	—				20			—			—			20
Total debt securities	19,982				228,418			5,366			—			253,766
Marketable equity securities:
Perpetual preferred securities (5)	468				569			663		-3	—			1,700
Other marketable equity securities	1,952				24			—			—			1,976
Total marketable equity securities	2,420				593			663			—			3,676
Total available-for-sale securities	22,402				229,011			6,029			—			257,442
Mortgages held for sale	—				13,252			2,313			—			15,565
Loans held for sale	—				1			—			—			1
Loans	—				—			5,788			—			5,788
Mortgage servicing rights (residential)	—				—			12,738			—			12,738
Derivative assets:
Interest rate contracts	27				63,306			365			—			63,698
Commodity contracts	—				7,438			23			—			7,461
Equity contracts	4,102				3,544			1,359			—			9,005
Foreign exchange contracts	65				7,339			—			—			7,404
Credit contracts	—				440			466			—			906
Netting	—				—			—			(65,869	)	-6	(65,869	)
Total derivative assets (7)	4,194				82,067			2,213			(65,869	)		22,605
Other assets	—				—			2,593			—			2,593
Total assets recorded at fair value	$	55,614			356,030			32,324			(65,869	)		378,099
Derivative liabilities:
Interest rate contracts	$	(29	)		(59,958	)		(72	)		—			(60,059	)
Commodity contracts	—				(7,680	)		(22	)		—			(7,702	)
Equity contracts	(1,290		)		(4,305	)		(1,443	)		—			(7,038	)
Foreign exchange contracts	(60		)		(7,767	)		—			—			(7,827	)
Credit contracts	—				(456	)		(655	)		—			(1,111	)
Other derivative contracts	—				—			(44	)		—			(44	)
Netting	—				—			—			65,043		-6	65,043
Total derivative liabilities (7)	(1,379		)		(80,166	)		(2,236	)		65,043			(18,738	)
Short sale liabilities:
Securities of U.S. Treasury and federal agencies	(7,043		)		(1,636	)		—			—			(8,679	)
Securities of U.S. states and political subdivisions	—				(26	)		—			—			(26	)
Corporate debt securities	—				(5,055	)		—			—			(5,055	)
Equity securities	(2,259		)		(2	)		—			—			(2,261	)
Other securities	—				(73	)		(6	)		—			(79	)
Total short sale liabilities	(9,302		)		(6,792	)		(6	)		—			(16,100	)
Other liabilities (excluding derivatives)	—				—			(28	)		—			(28	)
Total liabilities recorded at fair value	$	(10,681	)		(86,958	)		(2,270	)		65,043			(34,866	)
-1	The entire balance only consists of collateralized loan obligations.
-2	Net gains from trading activities recognized in the income statement for the year ended December 31, 2014, include $211 million in net unrealized losses on trading securities held at December 31, 2014.
-3	Balances consist of securities that are mostly investment grade based on ratings received from the ratings agencies or internal credit grades categorized as investment grade if external ratings are not available. The securities are classified as Level 3 due to limited market activity.
-4	Includes collateralized debt obligations of $500 million.
-5	Perpetual preferred securities include ARS and corporate preferred securities. See Note 7 (Securitizations and Variable Interest Entities) for additional information.
-6	Represents balance sheet netting of derivative asset and liability balances, related cash collateral and portfolio level counterparty valuation adjustments. See Note 12 (Derivatives) for additional information.
-7	Derivative assets and derivative liabilities include contracts qualifying for hedge accounting, economic hedges, and derivatives included in trading assets and trading liabilities, respectively.
Fair Value, Transfers Between Fair Value Levels	Transfers into and out of Level 1, Level 2, and Level 3 for the periods presented are provided within the following table. The amounts reported as transfers represent the fair value as of the beginning of the quarter in which the transfer occurred.
		Transfers Between Fair Value Levels
		Level 1							Level 2						Level 3 (1)
	(in millions)	In				Out			In			Out			In		Out		Total
	Quarter ended March 31, 2015
	Trading assets (excluding derivatives)	$	15			(2	)		10			(16	)		1		(8	)	—
	Available-for-sale securities	—				—			52			—			—		(52	)	—
	Mortgages held for sale	—				—			67			(42	)		42		(67	)	—
	Loans	—				—			—			—			—		—		—
	Net derivative assets and liabilities (2)	—				—			34			12			(12	)	(34	)	—
	Short sale liabilities	(1		)		—			—			1			—		—		—
	Total transfers	$	14			(2	)		163			(45	)		31		(161	)	—
	Quarter ended March 31, 2014
	Trading assets (excluding derivatives	$	—			—			2			(28	)		28		(2	)	—
	Available-for-sale securities	—				(8	)		8			(95	)		95		—		—
	Mortgages held for sale	—				—			24			(57	)		57		(24	)	—
	Loans	—				—			49			—			—		(49	)	—
	Net derivative assets and liabilities (2)	—				—			45			(3	)		3		(45	)	—
	Short sale liabilities	—				—			—			—			—		—		—
	Total transfers	$	—			(8	)		128			(183	)		183		(120	)	—
	-1	All transfers in and out of Level 3 are disclosed within the recurring Level 3 rollforward table in this Note.
	-2	Includes net derivative assets that were transferred from Level 3 to Level 2 due to increased observable market data. Also includes net derivative liabilities that were transferred from Level 2 to Level 3 due to a decrease in observable market data.
Fair Value, Assets and Liabilities Measured on Recurring Basis, Level 3 Reconciliation	The changes in Level 3 assets and liabilities measured at fair value on a recurring basis for the quarter ended March 31, 2015, are summarized as follows:
						Total net gains						Purchases,									Net unrealized
						(losses) included in						sales,									gains (losses)
												issuances									included in
												and									income related
												settlements,									to assets and
												net (1)									liabilities held
	(in millions)	Balance,				Net			Other						Transfers		Transfers		Balance,		at period end		-2
		beginning				income			compre-						into		out of		end of
		of period							hensive						Level 3		Level 3		period
									income
	Quarter ended March 31, 2015
	Trading assets (excluding derivatives):
	Securities of U.S. states and	$	7			—			—			(1	)		—		—		6		—
	political subdivisions
	Collateralized loan and other	445				21			—			(85	)		—		—		381		(3	)
	debt obligations
	Corporate debt securities	54				2			—			(18	)		—		(7	)	31		—
	Mortgage-backed securities	—				—			—			—			—		—		—		—
	Asset-backed securities	79				16			—			(14	)		—		—		81		16
	Equity securities	10				—			—			—			—		—		10		—
	Total trading securities	595				39			—			(118	)		—		(7	)	509		13
	Other trading assets	55				6			—			3			1		(1	)	64		8
	Total trading assets	650				45			—			(115	)		1		(8	)	573		21		-3
	(excluding derivatives)
	Available-for-sale securities:
	Securities of U.S. states and	2,277				(1	)		(3	)		(241	)		—		(52	)	1,980		(5	)
	political subdivisions
	Mortgage-backed securities:
	Residential	24				4			(6	)		(22	)		—		—		—		—
	Commercial	109				1			(1	)		(5	)		—		—		104		—
	Total mortgage-backed securities	133				5			(7	)		(27	)		—		—		104		—
	Corporate debt securities	252				—			—			60			—		—		312		—
	Collateralized loan and other	1,087				29			(16	)		(47	)		—		—		1,053		—
	debt obligations
	Asset-backed securities:
	Auto loans and leases	245				—			4			—			—		—		249		—
	Home equity loans	—				—			—			—			—		—		—		—
	Other asset-backed securities	1,372				1			(11	)		(156	)		—		—		1,206		—
	Total asset-backed securities	1,617				1			(7	)		(156	)		—		—		1,455		—
	Total debt securities	5,366				34			(33	)		(411	)		—		(52	)	4,904		(5	)	-4
	Marketable equity securities:
	Perpetual preferred securities	663				3			(2	)		(24	)		—		—		640		—
	Total marketable	663				3			(2	)		(24	)		—		—		640		—		-5
	equity securities
	Total available-for-sale	6,029				37			(35	)		(435	)		—		(52	)	5,544		(5	)
	securities
	Mortgages held for sale	2,313				38			—			(228	)		42		(67	)	2,098		22		-6
	Loans	5,788				(6	)		—			(52	)		—		—		5,730		(2	)	-6
	Mortgage servicing rights (residential) (7)	12,738				(1,306	)		—			307			—		—		11,739		(773	)	-6
	Net derivative assets and liabilities:
	Interest rate contracts	293				482			—			(337	)		—		—		438		214
	Commodity contracts	1				(1	)		—			—			(2	)	—		(2	)	(2	)
	Equity contracts	(84		)		(7	)		—			(51	)		(10	)	(34	)	(186	)	(33	)
	Foreign exchange contracts	—				—			—			—			—		—		—		—
	Credit contracts	(189		)		(2	)		—			37			—		—		(154	)	(1	)
	Other derivative contracts	(44		)		(8	)		—			—			—		—		(52	)	(9	)
	Total derivative contracts	(23		)		464			—			(351	)		(12	)	(34	)	44		169		-8
	Other assets	2,593				38			—			(3	)		—		—		2,628		37		-3
	Short sale liabilities	(6		)		—			—			(9	)		—		—		(15	)	—		-3
	Other liabilities (excluding derivatives)	(28		)		1			—			—			—		—		(27	)	—		-6
	-1	See next page for detail.
	-2	Represents only net gains (losses) that are due to changes in economic conditions and management’s estimates of fair value and excludes changes due to the collection/realization of cash flows over time.
	-3	Included in net gains (losses) from trading activities and other noninterest income in the income statement.
-4	Included in net gains (losses) from debt securities in the income statement.
-5	Included in net gains (losses) from equity investments in the income statement.
-6	Included in mortgage banking and other noninterest income in the income statement.
-7	For more information on the changes in mortgage servicing rights, see Note 8 (Mortgage Banking Activities).
-8	Included in mortgage banking, trading activities, equity investments and other noninterest income in the income statement.
The changes in Level 3 assets and liabilities measured at fair value on a recurring basis for the quarter ended March 31, 2014, are summarized as follows:
	Balance,				Total net gains						Purchases,									Net unrealized
	beginning				(losses) included in						sales,									gains (losses)
	of period										issuances									included in
											and									income related
											settlements,									to assets and
											net (1)									liabilities held
(in millions)					Net			Other						Transfers		Transfers		Balance,		at period end		-2
					income			compre-						into		out of		end of
								hensive						Level 3		Level 3		period
								income
Quarter ended March 31, 2014
Trading assets (excluding derivatives):
Securities of U.S. states and	$	39			—			—			1			—		—		40		—
political subdivisions
Collateralized loan and other	541				11			—			52			4		—		608		(10	)
debt obligations
Corporate debt securities	53				1			—			9			24		(1	)	86		—
Mortgage-backed securities	1				—			—			—			—		—		1		—
Asset-backed securities	122				14			—			(38	)		—		(1	)	97		14
Equity securities	13				—			—			—			—		—		13		—
Total trading securities	769				26			—			24			28		(2	)	845		4
Other trading assets	54				(2	)		—			—			—		—		52		1
Total trading assets	823				24			—			24			28		(2	)	897		5		-3
(excluding derivatives)
Available-for-sale securities:
Securities of U.S. states and	3,214				9			2			(132	)		6		—		3,099		—
political subdivisions
Mortgage-backed securities:
Residential	64				10			(3	)		(30	)		—		—		41		—
Commercial	138				1			11			(9	)		—		—		141		(2	)
Total mortgage-backed securities	202				11			8			(39	)		—		—		182		(2	)
Corporate debt securities	281				4			7			5			—		—		297		—
Collateralized loan and other	1,420				43			(13	)		(30	)		—		—		1,420		—
debt obligations
Asset-backed securities:
Auto loans and leases	492				—			(3	)		(215	)		—		—		274		—
Home equity loans	—				—			—			—			—		—		—		—
Other asset-backed securities	1,657				1			(4	)		(463	)		89		—		1,280		—
Total asset-backed securities	2,149				1			(7	)		(678	)		89		—		1,554		—
Total debt securities	7,266				68			(3	)		(874	)		95		—		6,552		(2	)	-4
Marketable equity securities:
Perpetual preferred securities	729				3			(4	)		(20	)		—		—		708		—
Total marketable equity securities	729				3			(4	)		(20	)		—		—		708		—		-5
Total available-for-sale	7,995				71			(7	)		(894	)		95		—		7,260		(2	)
securities
Mortgages held for sale	2,374				2			—			(46	)		57		(24	)	2,363		2		-6
Loans	5,723				2			—			13			—		(49	)	5,689		4		-6
Mortgage servicing rights (residential) (7)	15,580				(916	)		—			289			—		—		14,953		(441	)	-6
Net derivative assets and liabilities:
Interest rate contracts	(40		)		362			—			(264	)		—		—		58		77
Commodity contracts	(10		)		(31	)		—			1			(3	)	—		(43	)	(39	)
Equity contracts	(46		)		22			—			39			6		(45	)	(24	)	(36	)
Foreign exchange contracts	9				2			—			(5	)		—		—		6		(2	)
Credit contracts	(375		)		11			—			96			—		—		(268	)	1
Other derivative contracts	(3		)		(8	)		—			—			—		—		(11	)	—
Total derivative contracts	(465		)		358			—			(133	)		3		(45	)	(282	)	1		-8
Other assets	1,503				(63	)		—			600			—		—		2,040		(4	)	-3
Short sale liabilities	—				—			—			(5	)		—		—		(5	)	—		-3
Other liabilities (excluding derivatives)	(39		)		—			—			2			—		—		(37	)	—		-6
-1	See next page for detail.
-2	Represents only net gains (losses) that are due to changes in economic conditions and management’s estimates of fair value and excludes changes due to the collection/realization of cash flows over time.
-3	Included in net gains (losses) from trading activities and other noninterest income in the income statement.
-4	Included in net gains (losses) from debt securities in the income statement.
-5	Included in net gains (losses) from equity investments in the income statement.
-6	Included in mortgage banking and other noninterest income in the income statement.
-7	For more information on the changes in mortgage servicing rights, see Note 8 (Mortgage Banking Activities).
-8	Included in mortgage banking, trading activities, equity investments and other noninterest income in the income statement.
Fair Value, Assets and Liabilities Measured on Recurring Basis, Level 3 Reconciliation Detail	The following table presents gross purchases, sales, issuances and settlements related to the changes in Level 3 assets and liabilities measured at fair value on a recurring basis for the quarter ended March 31, 2015.
	(in millions)	Purchases				Sales			Issuances			Settlements			Net
	Quarter ended March 31, 2015
	Trading assets (excluding derivatives):
	Securities of U.S. states and political subdivisions	$	—			(1	)		—			—			(1	)
	Collateralized loan and other debt obligations	400				(485	)		—			—			(85	)
	Corporate debt securities	15				(33	)		—			—			(18	)
	Mortgage-backed securities	—				—			—			—			—
	Asset-backed securities	—				(5	)		—			(9	)		(14	)
	Equity securities	—				—			—			—			—
	Total trading securities	415				(524	)		—			(9	)		(118	)
	Other trading assets	3				—			—			—			3
	Total trading assets (excluding derivatives)	418				(524	)		—			(9	)		(115	)
	Available-for-sale securities:
	Securities of U.S. states and political subdivisions	—				(20	)		55			(276	)		(241	)
	Mortgage-backed securities:
	Residential	—				(22	)		—			—			(22	)
	Commercial	—				(5	)		—			—			(5	)
	Total mortgage-backed securities	—				(27	)		—			—			(27	)
	Corporate debt securities	60				—			—			—			60
	Collateralized loan and other debt obligations	44				(3	)		—			(88	)		(47	)
	Asset-backed securities:
	Auto loans and leases	—				—			—			—			—
	Home equity loans	—				—			—			—			—
	Other asset-backed securities	—				(1	)		59			(214	)		(156	)
	Total asset-backed securities	—				(1	)		59			(214	)		(156	)
	Total debt securities	104				(51	)		114			(578	)		(411	)
	Marketable equity securities:
	Perpetual preferred securities	—				—			—			(24	)		(24	)
	Total marketable equity securities	—				—			—			(24	)		(24	)
	Total available-for-sale securities	104				(51	)		114			(602	)		(435	)
	Mortgages held for sale	53				(291	)		120			(110	)		(228	)
	Loans	66				—			95			(213	)		(52	)
	Mortgage servicing rights (residential)	—				(1	)		308			—			307
	Net derivative assets and liabilities:
	Interest rate contracts	—				—			—			(337	)		(337	)
	Commodity contracts	—				—			—			—			—
	Equity contracts	—				(32	)		—			(19	)		(51	)
	Foreign exchange contracts	—				—			—			—			—
	Credit contracts	2				—			—			35			37
	Other derivative contracts	—				—			—			—			—
	Total derivative contracts	2				(32	)		—			(321	)		(351	)
	Other assets	—				—			—			(3	)		(3	)
	Short sale liabilities	6				(15	)		—			—			(9	)
	Other liabilities (excluding derivatives)	—				—			—			—			—
	The following table presents gross purchases, sales, issuances and settlements related to the changes in Level 3 assets and liabilities measured at fair value on a recurring basis for the quarter ended March 31, 2014.
	(in millions)	Purchases				Sales			Issuances			Settlements			Net
	Quarter ended March 31, 2014
	Trading assets (excluding derivatives):
	Securities of U.S. states and political subdivisions	$	5			(4	)		—			—			1
	Collateralized loan and other debt obligations	324				(270	)		—			(2	)		52
	Corporate debt securities	15				(6	)		—			—			9
	Mortgage-backed securities	—				—			—			—			—
	Asset-backed securities	10				(38	)		—			(10	)		(38	)
	Equity securities	—				—			—			—			—
	Total trading securities	354				(318	)		—			(12	)		24
	Other trading assets	—				—			—			—			—
	Total trading assets (excluding derivatives)	354				(318	)		—			(12	)		24
	Available-for-sale securities:
	Securities of U.S. states and political subdivisions	73				(55	)		11			(161	)		(132	)
	Mortgage-backed securities:
	Residential	—				(28	)		—			(2	)		(30	)
	Commercial	—				(8	)		—			(1	)		(9	)
	Total mortgage-backed securities	—				(36	)		—			(3	)		(39	)
Corporate debt securities	—				(1	)		11			(5	)		5
Collateralized loan and other debt obligations	124				(32	)		—			(122	)		(30	)
Asset-backed securities:
Auto loans and leases	—				—			—			(215	)		(215	)
Home equity loans	—				—			—			—			—
Other asset-backed securities	12				(12	)		64			(527	)		(463	)
Total asset-backed securities	12				(12	)		64			(742	)		(678	)
Total debt securities	209				(136	)		86			(1,033	)		(874	)
Marketable equity securities:
Perpetual preferred securities	—				—			—			(20	)		(20	)
Total marketable equity securities	—				—			—			(20	)		(20	)
Total available-for-sale securities	209				(136	)		86			(1,053	)		(894	)
Mortgages held for sale	47				(21	)		—			(72	)		(46	)
Loans	1				—			102			(90	)		13
Mortgage servicing rights (residential)	—				—			289			—			289
Net derivative assets and liabilities:
Interest rate contracts	—				—			—			(264	)		(264	)
Commodity contracts	—				—			—			1			1
Equity contracts	—				(58	)		—			97			39
Foreign exchange contracts	—				—			—			(5	)		(5	)
Credit contracts	—				—			—			96			96
Other derivative contracts	—				—			—			—			—
Total derivative contracts	—				(58	)		—			(75	)		(133	)
Other assets	608				—			—			(8	)		600
Short sale liabilities	(5		)		—			—			—			(5	)
Other liabilities (excluding derivatives)	—				—			—			2			2
Fair Value, Assets and Liabilities Measured on Recurring Basis, Quantative Information about Valuation Techniques and Unobservable Inputs	The following table provides quantitative information about the valuation techniques and significant unobservable inputs used in the valuation of substantially all of our Level 3 assets and liabilities measured at fair value on a recurring basis for which we use an internal model.
	The significant unobservable inputs for Level 3 assets and liabilities that are valued using fair values obtained from third party vendors are not included in the table, as the specific inputs applied are not provided by the vendor. In addition, the table excludes the valuation techniques and significant unobservable inputs for certain classes of Level 3 assets and liabilities measured using an internal model that we consider, both individually and in the aggregate, insignificant relative to our overall Level 3 assets and liabilities. We made this determination based upon an evaluation of each class, which considered the magnitude of the positions, nature of the unobservable inputs and potential for significant changes in fair value due to changes in those inputs. For information on how changes in significant unobservable inputs affect the fair values of Level 3 assets and liabilities, see Note 17 (Fair Values of Assets and Liabilities) to Financial Statements in our 2014 Form 10-K.
	($ in millions, except cost to service amounts)	Fair Value				Valuation Technique(s)		Significant		Range of						Weighted
		Level 3						Unobservable Input		Inputs						Average (1)
	March 31, 2015
	Trading and available-for-sale securities:
	Securities of U.S. states and
	political subdivisions:
	Government, healthcare and	$	1,634			Discounted cash flow		Discount rate		0.5			-	5.8		%	1.7
	other revenue bonds
		59				Vendor priced
	Auction rate securities and other	293				Discounted cash flow		Discount rate		2			-	7.6			4
	municipal bonds
								Weighted average life		1.8			-	19.3		yrs	7.6
	Collateralized loan and other debt	462				Market comparable pricing		Comparability adjustment		(53.3		)	-	18.7		%	2.8
	obligations (2)
		972				Vendor priced
	Asset-backed securities:
	Auto loans and leases	249				Discounted cash flow		Discount rate		(0.3		)	-	(0.3	)		(0.3	)
	Other asset-backed securities:
	Diversified payment rights (3)	617				Discounted cash flow		Discount rate		1			-	6.4			2.8
	Other commercial and consumer	632			-4	Discounted cash flow		Discount rate		1.8			-	16.3			5.6
								Weighted average life		1.5			-	9.6		yrs	4.7
		38				Vendor priced
	Marketable equity securities:	640			-5	Discounted cash flow		Discount rate		4			-	9		%	6.3
	perpetual preferred
								Weighted average life		1			-	11.6		yrs	9.7
	Mortgages held for sale (residential)	2,024				Discounted cash flow		Default rate		0.6			-	15		%	2.4
								Discount rate		1.1			-	6.2			5
								Loss severity		0.1			-	26.5			18.1
								Prepayment rate		2			-	18.6			9.8
		74				Market comparable pricing		Comparability adjustment		(93.2		)	-	9.6			(31.2	)
	Loans	5,730			-6	Discounted cash flow		Discount rate		0			-	3.6			3
								Prepayment rate		0.4			-	100			12.2
								Utilization rate		0			-	1			0.4
	Mortgage servicing rights (residential)	11,739				Discounted cash flow		Cost to service per loan (7)		$	86		-	662			174
								Discount rate		5.3			-	17.4		%	7.4
								Prepayment rate (8)		8.3			-	24.6			13.2
	Net derivative assets and (liabilities):
	Interest rate contracts	238				Discounted cash flow		Default rate		0			-	0.05			0.02
								Loss severity		50			-	50			50
	Interest rate contracts: derivative loan	200				Discounted cash flow		Fall-out factor		1			-	99			24.2
	commitments
								Initial-value servicing		(30.3		)	-	110.7		bps	44.8
	Equity contracts	110				Discounted cash flow		Conversion factor		(11.2		)	-	0		%	(7.6	)
								Weighted average life		0.8			-	2.8		yrs	1.1
		(296		)		Option model		Correlation factor		(50.0		)	-	96.9		%	59
								Volatility factor		8.3			-	100			28.1
	Credit contracts	(157		)		Market comparable pricing		Comparability adjustment		(28.7		)	-	34.6			1.7
		3				Option model		Credit spread		0			-	15.2			0.8
								Loss severity		11.5			-	72.5			50.1
	Other assets: nonmarketable equity investments	2,549				Market comparable pricing		Comparability adjustment		(22.0		)	-	(4.8	)		(13.3	)
	Insignificant Level 3 assets, net of liabilities	504			-9
	Total level 3 assets, net of liabilities	$	28,314		-10
	-1	Weighted averages are calculated using outstanding unpaid principal balance for cash instruments such as loans and securities, and notional amounts for derivative instruments.
	-2	Includes $487 million of collateralized debt obligations.
	-3	Securities backed by specified sources of current and future receivables generated from foreign originators.
	-4	Consists primarily of investments in asset-backed securities that are revolving in nature, in which the timing of advances and repayments of principal are uncertain.
	-5	Consists of auction rate preferred equity securities with no maturity date that are callable by the issuer.
	-6	Consists predominantly of reverse mortgage loans securitized with GNMA that were accounted for as secured borrowing transactions.
	-7	The high end of the range of inputs is for servicing modified loans. For non-modified loans the range is $86 - $302.
	-8	Includes a blend of prepayment speeds and expected defaults. Prepayment speeds are influenced by mortgage interest rates as well as our estimation of drivers of borrower behavior.
	-9	Represents the aggregate amount of Level 3 assets and liabilities measured at fair value on a recurring basis that are individually and in the aggregate insignificant. The amount includes corporate debt securities, mortgage-backed securities, other marketable equity securities, certain other assets, other liabilities and certain net derivative assets and liabilities, such as commodity contracts, foreign exchange contracts and other derivative contracts.
	-10	Consists of total Level 3 assets of $30.4 billion and total Level 3 liabilities of $2.1 billion, before netting of derivative balances.
($ in millions, except cost to service amounts)	Fair Value				Valuation Technique(s)		Significant		Range of						Weighted
	Level 3						Unobservable Input		Inputs						Average (1)
31-Dec-14
Trading and available-for-sale securities:
Securities of U.S. states and
political subdivisions:
Government, healthcare and	$	1,900			Discounted cash flow		Discount rate		0.4			-	5.6		%	1.5
other revenue bonds
	61				Vendor priced
Auction rate securities and other	323				Discounted cash flow		Discount rate		1.5			-	7.6			3.9
municipal bonds
							Weighted average life		1.3			-	19.4		yrs	6.4
Collateralized loan and other debt	565				Market comparable pricing		Comparability adjustment		(53.9		)	-	25		%	0.9
obligations (2)
	967				Vendor priced
Asset-backed securities:
Auto loans and leases	245				Discounted cash flow		Discount rate		0.4			-	0.4			0.4
Other asset-backed securities:
Diversified payment rights (3)	661				Discounted cash flow		Discount rate		0.9			-	7.1			2.9
Other commercial and consumer	750			-4	Discounted cash flow		Discount rate		1.9			-	21.5			5
							Weighted average life		1.6			-	10.7		yrs	4
	40				Vendor priced
Marketable equity securities:	663			-5	Discounted cash flow		Discount rate		4.1			-	9.3		%	6.6
perpetual preferred
							Weighted average life		1			-	11.8		yrs	9.7
Mortgages held for sale (residential)	2,235				Discounted cash flow		Default rate		0.4			-	15		%	2.6
							Discount rate		1.1			-	7.7			5.2
							Loss severity		0.1			-	26.4			18.3
							Prepayment rate		2			-	15.5			8.1
	78				Market comparable pricing		Comparability adjustment		(93.0		)	-	10			(30.0	)
Loans	5,788			-6	Discounted cash flow		Discount rate		0			-	3.8			3.1
							Prepayment rate		0.6			-	100			11.2
							Utilization rate		0			-	1			0.4
Mortgage servicing rights (residential)	12,738				Discounted cash flow		Cost to service per		$	86		-	683			179
							loan (7)
							Discount rate		5.9			-	16.9		%	7.6
							Prepayment rate (8)		8			-	22			12.5
Net derivative assets and (liabilities):
Interest rate contracts	196				Discounted cash flow		Default rate		0			-	0.02			0.01
							Loss severity		50			-	50			50
Interest rate contracts: derivative loan	97				Discounted cash flow		Fall-out factor		1			-	99			24.5
commitments
							Initial-value servicing		(31.1		)	-	113.3		bps	46.5
Equity contracts	162				Discounted cash flow		Conversion factor		(11.2		)	-	0		%	(8.4	)
							Weighted average life		1			-	2		yrs	1.3
	(246		)		Option model		Correlation factor		(56.0		)	-	96.3		%	42.1
							Volatility factor		8.3			-	80.9			28.3
Credit contracts	(192		)		Market comparable pricing		Comparability adjustment		(28.6		)	-	26.3			1.8
	3				Option model		Credit spread		0			-	17			0.9
							Loss severity		11.5			-	72.5			48.7
Other assets: nonmarketable equity investments	2,512				Market comparable pricing		Comparability adjustment		(19.7		)	-	(4.0	)		(14.7	)
Insignificant Level 3 assets, net of liabilities	507			-9
Total level 3 assets, net of liabilities	$	30,054		-10
-1	Weighted averages are calculated using outstanding unpaid principal balance for cash instruments such as loans and securities, and notional amounts for derivative instruments.
-2	Includes $500 million of collateralized debt obligations.
-3	Securities backed by specified sources of current and future receivables generated from foreign originators.
-4	Consists primarily of investments in asset-backed securities that are revolving in nature, in which the timing of advances and repayments of principal are uncertain.
-5	Consists of auction rate preferred equity securities with no maturity date that are callable by the issuer.
-6	Consists predominantly of reverse mortgage loans securitized with GNMA that were accounted for as secured borrowing transactions.
-7	The high end of the range of inputs is for servicing modified loans. For non-modified loans the range is $86 - $270.
-8	Includes a blend of prepayment speeds and expected defaults. Prepayment speeds are influenced by mortgage interest rates as well as our estimation of drivers of borrower behavior.
-9	Represents the aggregate amount of Level 3 assets and liabilities measured at fair value on a recurring basis that are individually and in the aggregate insignificant. The amount includes corporate debt securities, mortgage-backed securities, asset-backed securities backed by home equity loans, other marketable equity securities, certain other assets, other liabilities and certain net derivative assets and liabilities, such as commodity contracts, foreign exchange contracts and other derivative contracts.
-10	Consists of total Level 3 assets of $32.3 billion and total Level 3 liabilities of $2.3 billion, before netting of derivative balances.
Fair Value, Assets Recorded at Fair Value on a Nonrecurring Basis	The following table provides the fair value hierarchy and carrying amount of all assets that were still held as of March 31, 2015, and December 31, 2014, and for which a nonrecurring fair value adjustment was recorded during the periods presented.
		March 31, 2015													December 31, 2014
	(in millions)	Level 1				Level 2			Level 3			Total			Level 1		Level 2		Level 3		Total
	Mortgages held for sale (LOCOM) (1)	$	—			2,070			986			3,056			—		2,197		1,098		3,295
	Loans:
	Commercial	—				115			—			115			—		243		—		243
	Consumer	—				537			7			544			—		2,018		5		2,023
	Total loans (2)	—				652			7			659			—		2,261		5		2,266
	Other assets (3)	—				186			113			299			—		417		460		877
	-1	Mostly real estate 1-4 family first mortgage loans.
	-2	Represents carrying value of loans for which adjustments are based on the appraised value of the collateral.
	-3	Includes the fair value of foreclosed real estate, other collateral owned and nonmarketable equity investments.
Changes in Fair Value of Assets Recorded at Fair Value on Nonrecurring Basis	The following table presents the increase (decrease) in value of certain assets for which a nonrecurring fair value adjustment has been recognized during the periods presented.
		Quarter ended Mar 31,
	(in millions)	2015				2014
	Mortgages held for sale (LOCOM)	$	31			46
	Loans:
	Commercial	(35		)		(36	)
	Consumer	(341		)		(468	)
	Total loans (1)	(376		)		(504	)
	Other assets (2)	(61		)		—
	Total	$	(406	)		(458	)
	-1	Represents write-downs of loans based on the appraised value of the collateral.
	-2	Includes the losses on foreclosed real estate and other collateral owned that were measured at fair value subsequent to their initial classification as foreclosed assets. Also includes impairment losses on nonmarketable equity investments.
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis, Quantative Information about Valuation Techniques and Unobservable Inputs	The table below provides quantitative information about the valuation techniques and significant unobservable inputs used in the valuation of substantially all of our Level 3 assets and liabilities that are measured at fair value on a nonrecurring basis using an internal model. The table is limited to financial instruments that had nonrecurring fair value adjustments during the periods presented.
	We have excluded from the table classes of Level 3 assets and liabilities measured using an internal model that we consider, both individually and in the aggregate, insignificant relative to our overall Level 3 nonrecurring measurements. We made this determination based upon an evaluation of each class which considered the magnitude of the positions, nature of the unobservable inputs and potential for significant changes in fair value due to changes in those inputs.
	($ in millions)	Fair Value				Valuation Technique(s) (1)		Significant		Range of inputs					Weighted
		Level 3						Unobservable Inputs (1)							Average (2)
	March 31, 2015
	Residential mortgages held for sale (LOCOM)	$	986		-3	Discounted cash flow		Default rate	-5	0.2	—	3.7	%		2.6	%
								Discount rate		1.5	—	8.5			3.5
								Loss severity		1.2	—	37.8			3.8
								Prepayment rate	-6	2	—	100			59.6
	Insignificant level 3 assets	120
	Total	$	1,106
	December 31, 2014
	Residential mortgages held for sale (LOCOM)	$	1,098		-3	Discounted cash flow		Default rate	-5	0.9	—	3.8	%		2.1	%
								Discount rate		1.5	—	8.5			3.6
								Loss severity		0	—	29.8			3.8
								Prepayment rate	-6	2	—	100			65.5
	Other assets: private equity fund investments (4)	171				Market comparable pricing		Comparability adjustment		6	—	6			6
	Insignificant level 3 assets	294
	Total	$	1,563
	-1	Refer to the narrative following the recurring quantitative Level 3 table of this Note for a definition of the valuation technique(s) and significant unobservable inputs.
	-2	For residential MHFS, weighted averages are calculated using outstanding unpaid principal balance of the loans.
	-3	Consists of approximately $926 million and $1.0 billion government insured/guaranteed loans purchased from GNMA-guaranteed mortgage securitizations, at March 31, 2015 and December 31, 2014, respectively and $60 million and $78 million of other mortgage loans which are not government insured/guaranteed at March 31, 2015 and December 31, 2014, respectively.
	-4	Represents a single investment. For additional information, see the “Alternative Investments” section in this Note.
	-5	Applies only to non-government insured/guaranteed loans.
	-6	Includes the impact on prepayment rate of expected defaults for the government insured/guaranteed loans, which affects the frequency and timing of early resolution of loans.
Fair Value Investments in Entites that Calculate Net Asset Value Per Share	The following table summarizes our investments in various types of funds for which we use net asset values (NAVs) per share as a practical expedient to measure fair value on recurring and nonrecurring bases. The investments are included in trading assets, available-for-sale securities, and other assets. The table excludes those investments that are probable of being sold at an amount different from the funds’ NAVs.
	(in millions)	Fair				Unfunded			Redemption		Redemption
		value				commitments			frequency		notice
											period
	31-Mar-15
	Offshore funds	$	60			—			Daily - Quarterly		1 - 60 days
	Hedge funds	1				—			Daily - Quarterly		1-90 days
	Private equity funds (1)(2)	1,235				236			N/A		N/A
	Venture capital funds (2)	68				9			N/A		N/A
	Total (3)	$	1,364			245
	31-Dec-14
	Offshore funds	$	125			—			Daily - Quarterly		1 - 60 days
	Hedge funds	1				—			Daily - Quarterly		1-90 days
	Private equity funds (1)(2)	1,313				243			N/A		N/A
	Venture capital funds (2)	68				9			N/A		N/A
	Total (3)	$	1,507			252
	N/A - Not applicable
	-1	Excludes a private equity fund investment of $172 million and $171 million at March 31, 2015, and December 31, 2014, respectively. This investment was sold in April 2015 for an amount different from the fund’s NAV.
	-2	Includes certain investments subject to the Volcker Rule that we may have to divest.
	-3	March 31, 2015, and December 31, 2014, each include $1.3 billion of fair value for nonmarketable equity investments carried at cost for which we use NAVs as a practical expedient to determine nonrecurring fair value adjustments. The fair values of investments that had nonrecurring fair value adjustments were $75 million and $108 million at March 31, 2015, and December 31, 2014, respectively.
Fair Value Option, Carrying Amount	The following table reflects differences between the fair value carrying amount of certain assets and liabilities for which we have elected the fair value option and the contractual aggregate unpaid principal amount at maturity.
		March 31, 2015										December 31, 2014
	(in millions)	Fair value				Aggregate			Fair value			Fair value			Aggregate		Fair value
		carrying				unpaid			carrying			carrying			unpaid		carrying
		amount				principal			amount			amount			principal		amount
									less								less
									aggregate								aggregate
									unpaid								unpaid
									principal								principal
	Trading assets - loans:
	Total loans	$	1,110			1,132			(22	)		1,387			1,410		(23	)
	Nonaccrual loans	—				—			—			—			1		(1	)
	Mortgages held for sale:
	Total loans	19,015				18,551			464			15,565			15,246		319
	Nonaccrual loans	129				213			(84	)		160			252		(92	)
	Loans 90 days or more past due and still accruing	26				29			(3	)		27			30		(3	)
	Loans held for sale:
	Total loans	1				10			(9	)		1			10		(9	)
	Nonaccrual loans	1				10			(9	)		1			10		(9	)
	Loans:
	Total loans	5,730				5,475			255			5,788			5,527		261
	Nonaccrual loans	431				442			(11	)		367			376		(9	)
	Other assets (1)	2,549				n/a			n/a			2,512			n/a		n/a
	-1	Consists of nonmarketable equity investments carried at fair value. See Note 6 (Other Assets) for more information.
Fair Value Option, Gains and Losses	The changes in fair value related to initial measurement and subsequent changes in fair value included in earnings for these assets and liabilities measured at fair value are shown below by income statement line item.
		2015										2014
	(in millions)	Mortgage banking noninterest income				Net gains			Other			Mortgage			Net gains		Other
						(losses)			noninterest			banking			(losses)		noninterest
						from			income			noninterest			from		income
						trading						income			trading
						activities									activities
	Quarter ended March 31,
	Trading assets - loans	$	—			15			1			—			12		—
	Mortgages held for sale	581				—			—			506			—		—
	Loans	—				—			(4	)		—			—		—
	Other assets	—				—			38			—			—		(61	)
	Other interests held (1)	—				—			—			—			(1	)	(1	)
	-1	Consists of retained interests in securitizations and changes in fair value of letters of credit.
Fair Value Option, Instrument Specific Credit Risk	The following table shows the estimated gains and losses from earnings attributable to instrument-specific credit risk related to assets accounted for under the fair value option.
		Quarter ended March 31,
	(in millions)	2015				2014
	Gains (losses) attributable to instrument-specific credit risk:
	Trading assets - loans	$	15			12
	Mortgages held for sale	17				10
	Total	$	32			22
Fair Value, Estimated for Financial Instruments Not Carried at Fair Value	The table below is a summary of fair value estimates for financial instruments, excluding financial instruments recorded at fair value on a recurring basis, which are included within the Assets and Liabilities Recorded at Fair Value on a Recurring Basis table included earlier in this Note. The carrying amounts in the following table are recorded on the balance sheet under the indicated captions, except for nonmarketable equity investments, which are included in Other Assets.
	We have not included assets and liabilities that are not financial instruments in our disclosure, such as the value of the long-term relationships with our deposit, credit card and trust customers, amortized MSRs, premises and equipment, goodwill and other intangibles, deferred taxes and other liabilities. The total of the fair value calculations presented does not represent, and should not be construed to represent, the underlying value of the Company.
						Estimated fair value
	(in millions)	Carrying amount				Level 1			Level 2			Level 3			Total
	March 31, 2015
	Financial assets
	Cash and due from banks (1)	$	19,793			19,793			—			—			19,793
	Federal funds sold, securities purchased under resale agreements and other short-term investments (1)	291,317				7,100			284,217			—			291,317
	Held-to-maturity securities	67,133				45,676			17,996			5,109			68,781
	Mortgages held for sale (2)	4,591				—			3,608			986			4,594
	Loans held for sale (2)	680				—			697			—			697
	Loans, net (3)	831,427				—			60,086			784,517			844,603
	Nonmarketable equity investments (cost method)	6,912				—			—			8,599			8,599
	Financial liabilities
	Deposits	1,196,663				—			1,163,086			33,653			1,196,739
	Short-term borrowings (1)	77,697				—			77,697			—			77,697
	Long-term debt (4)	183,283				—			175,239			9,787			185,026
	December 31, 2014
	Financial assets
	Cash and due from banks (1)	$	19,571			19,571			—			—			19,571
	Federal funds sold, securities purchased under resale agreements and other short-term investments (1)	258,429				8,991			249,438			—			258,429
	Held-to-maturity securities	55,483				41,548			9,021			5,790			56,359
	Mortgages held for sale (2)	3,971				—			2,875			1,098			3,973
	Loans held for sale (2)	721				—			739			—			739
	Loans, net (3)	832,671				—			60,052			784,786			844,838
	Nonmarketable equity investments (cost method)	7,033				—			—			8,377			8,377
	Financial liabilities
	Deposits	1,168,310				—			1,132,845			35,566			1,168,411
	Short-term borrowings (1)	63,518				—			63,518			—			63,518
	Long-term debt (4)	183,934				—			174,996			10,479			185,475
	-1	Amounts consist of financial instruments in which carrying value approximates fair value.
	-2	Balance reflects MHFS and LHFS, as applicable, other than those MHFS and LHFS for which we elected the fair value option.
	-3	Loans exclude balances for which the fair value option was elected and also exclude lease financing with a carrying amount of $12.4 billion and $12.3 billion at March 31, 2015 and December 31, 2014, respectively.
	-4	The carrying amount and fair value exclude obligations under capital leases of $9 million at both March 31, 2015 and December 31, 2014.

Preferred_Stock_Tables

Preferred Stock (Tables)	3 Months Ended
	Mar. 31, 2015
Preferred Stock [Abstract]
Detail of Preferred Stock	Our total authorized, issued and outstanding preferred stock is presented in the following two tables along with the Employee Stock Ownership Plan (ESOP) Cumulative Convertible Preferred Stock.
		31-Mar-15					31-Dec-14
		Liquidation			Shares		Liquidation			Shares
		preference			authorized		preference			authorized
		per share			and designated		per share			and designated
	DEP Shares
	Dividend Equalization Preferred Shares (DEP)	$	10		97,000		$	10		97,000
	Series G
	7.25% Class A Preferred Stock	15,000			50,000		15,000			50,000
	Series H
	Floating Class A Preferred Stock	20,000			50,000		20,000			50,000
	Series I
	Floating Class A Preferred Stock	100,000			25,010		100,000			25,010
	Series J
	8.00% Non-Cumulative Perpetual Class A Preferred Stock	1,000			2,300,000		1,000			2,300,000
	Series K
	7.98% Fixed-to-Floating Non-Cumulative Perpetual Class A Preferred Stock	1,000			3,500,000		1,000			3,500,000
	Series L
	7.50% Non-Cumulative Perpetual Convertible Class A Preferred Stock	1,000			4,025,000		1,000			4,025,000
	Series N
	5.20% Non-Cumulative Perpetual Class A Preferred Stock	25,000			30,000		25,000			30,000
	Series O
	5.125% Non-Cumulative Perpetual Class A Preferred Stock	25,000			27,600		25,000			27,600
	Series P
	5.25% Non-Cumulative Perpetual Class A Preferred Stock	25,000			26,400		25,000			26,400
	Series Q
	5.85% Fixed-to-Floating Non-Cumulative Perpetual Class A Preferred Stock	25,000			69,000		25,000			69,000
	Series R
	6.625% Fixed-to-Floating Non-Cumulative Perpetual Class A Preferred Stock	25,000			34,500		25,000			34,500
	Series S
	5.900% Fixed-to-Floating Non-Cumulative Perpetual Class A Preferred Stock	25,000			80,000		25,000			80,000
	Series T
	6.00% Non-Cumulative Perpetual Class A Preferred Stock	25,000			32,200		25,000			32,200
	Series U
	5.875% Fixed-to-Floating Non-Cumulative Perpetual Class A Preferred Stock	25,000			80,000		—			—
	ESOP
	Cumulative Convertible Preferred Stock (1)	—			2,036,572		—			1,251,287
	Total				12,463,282					11,597,997
	-1	See the ESOP Cumulative Convertible Preferred Stock section of this Note for additional information about the liquidation preference for the ESOP Cumulative Convertible Preferred Stock.
		31-Mar-15									31-Dec-14
	(in millions, except shares)	Shares		Par			Carrying		Discount		Shares		Par		Carrying	Discount
		issued and		value			value				issued and		value		value
		outstanding									outstanding
	DEP Shares
	Dividend Equalization Preferred Shares (DEP)	96,546		$	—		—		—		96,546		$	—	—	—
	Series I (1)
	Floating Class A Preferred Stock	25,010		2,501			2,501		—		25,010		2,501		2,501	—
	Series J (1)
	8.00% Non-Cumulative Perpetual Class A Preferred Stock	2,150,375		2,150			1,995		155		2,150,375		2,150		1,995	155
	Series K (1)
	7.98% Fixed-to-Floating Non-Cumulative Perpetual Class A Preferred Stock	3,352,000		3,352			2,876		476		3,352,000		3,352		2,876	476
	Series L (1)
	7.50% Non-Cumulative Perpetual Convertible Class A Preferred Stock	3,968,000		3,968			3,200		768		3,968,000		3,968		3,200	768
	Series N (1)
	5.20% Non-Cumulative Perpetual Class A Preferred Stock	30,000		750			750		—		30,000		750		750	—
	Series O (1)
	5.125% Non-Cumulative Perpetual Class A Preferred Stock	26,000		650			650		—		26,000		650		650	—
	Series P (1)
	5.25% Non-Cumulative Perpetual Class A Preferred Stock	25,000		625			625		—		25,000		625		625	—
	Series Q (1)
	5.85% Fixed-to-Floating Non-Cumulative Perpetual Class A Preferred Stock	69,000		1,725			1,725		—		69,000		1,725		1,725	—
	Series R (1)
	6.625% Fixed-to-Floating Non-Cumulative Perpetual Class A Preferred Stock	33,600		840			840		—		33,600		840		840	—
	Series S (1)
5.900% Fixed-to-Floating Non-Cumulative Perpetual Class A Preferred Stock	80,000		2,000			2,000		—		80,000		2,000		2,000	—
Series T (1)
6.000% Non-Cumulative Perpetual Class A Preferred Stock	32,000		800			800		—		32,000		800		800	—
Series U (1)
5.875% Fixed-to-Floating Non-Cumulative Perpetual Class A Preferred Stock	80,000		2,000			2,000		—		—		—		—	—
ESOP
Cumulative Convertible Preferred Stock	2,036,572		2,036			2,036		—		1,251,287		1,251		1,251	—
Total	12,004,103		$	23,397		21,998		1,399		11,138,818		$	20,612	19,213	1,399
-1	Preferred shares qualify as Tier 1 capital.
Detail of Employee Stock Ownership Plan Preferred Stock
		Shares issued and outstanding				Carrying value
		Mar. 31,		Dec. 31,		Mar. 31,			Dec. 31,		Adjustable dividend rate
	(in millions, except shares)	2015		2014		2015			2014		Minimum		Maximum
	ESOP Preferred Stock
	$1,000 liquidation preference per share
	2015	826,598		—		$	826		—		8.9	%	9.9
	2014	320,019		352,158		320			352		8.7		9.7
	2013	278,826		288,000		279			288		8.5		9.5
	2012	189,204		189,204		189			189		10		11
	2011	205,263		205,263		205			205		9		10
	2010	141,011		141,011		141			141		9.5		10.5
	2008	42,204		42,204		42			42		10.5		11.5
	2007	24,728		24,728		25			25		10.75		11.75
	2006	8,719		8,719		9			9		10.75		11.75
	Total ESOP Preferred Stock (1)	2,036,572		1,251,287		$	2,036		1,251
	Unearned ESOP shares (2)					$	(2,215	)	(1,360	)
	-1	At March 31, 2015 and December 31, 2014, additional paid-in capital included $179 million and $109 million, respectively, related to ESOP preferred stock.
	-2	We recorded a corresponding charge to unearned ESOP shares in connection with the issuance of the ESOP Preferred Stock. The unearned ESOP shares are reduced as shares of the ESOP Preferred Stock are committed to be released.

Employee_Benefits_Tables

Employee Benefits (Tables)	3 Months Ended
	Mar. 31, 2015
Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]
Components of Net Periodic Benefit Cost	The net periodic benefit cost was:
		2015						2014
		Pension benefits						Pension benefits
	(in millions)	Qualified			Non-qualified	Other		Qualified		Non-qualified	Other
						benefits					benefits
	Quarter ended March 31,
	Service cost	$	—		—	2		—		—	2
	Interest cost	107			6	11		116		6	11
	Expected return on plan assets	(161		)	—	(9	)	(157	)	—	(9	)
	Amortization of net actuarial loss (gain)	27			5	(1	)	23		3	(7	)
	Amortization of prior service credit	—			—	(1	)	—		—	(1	)
	Settlement loss	—			13	—		—		—	—
	Net periodic benefit cost (income)	$	(27	)	24	2		(18	)	9	(4	)

Earnings_Per_Common_Share_Tabl

Earnings Per Common Share (Tables)	3 Months Ended
	Mar. 31, 2015
Earnings Per Share [Abstract]
Earnings Per Common Share	The table below shows earnings per common share and diluted earnings per common share and reconciles the numerator and denominator of both earnings per common share calculations. See Note 1 (Summary of Significant Accounting Policies) for discussion of private share repurchases and the Consolidated Statement of Changes in Equity.
		Quarter ended March 31,
	(in millions, except per share amounts)	2015			2014
	Wells Fargo net income	$	5,804		5,893
	Less: Preferred stock dividends and other	343			286
	Wells Fargo net income applicable to common stock (numerator)	$	5,461		5,607
	Earnings per common share
	Average common shares outstanding (denominator)	5,160.40			5,262.80
	Per share	$	1.06		1.07
	Diluted earnings per common share
	Average common shares outstanding	5,160.40			5,262.80
	Add: Stock options	28.8			33.5
	Restricted share rights	40.2			46.5
	Warrants	14.2			10.5
	Diluted average common shares outstanding (denominator)	5,243.60			5,353.30
	Per share	$	1.04		1.05
Antidilutive Warrants And Options Outstanding	The following table presents any outstanding options and warrants to purchase shares of common stock that were anti-dilutive (the exercise price was higher than the weighted-average market price), and therefore not included in the calculation of diluted earnings per common share.
		Weighted-average shares
		Quarter ended March 31,
	(in millions)	2015		2014
	Options	7.1		9.6

Other_Comprehensive_Income_Tab

Other Comprehensive Income (Tables)	3 Months Ended
	Mar. 31, 2015
Cumulative Other Comprehensive Income Balances [Abstract] [Abstract]
Components of other comprehensive income, reclassifications to net income by income statement line item, and the related tax effects	The following table provides the components of other comprehensive income (OCI), reclassifications to net income by income statement line item, and the related tax effects.
		Quarter ended March 31,
		2015									2014
	(in millions)	Before			Tax		Net of				Before			Tax		Net of
		tax			effect		tax				tax			effect		tax
	Investment securities:
	Net unrealized gains arising during the period	$	393		(47	)	346				2,725			(993	)	1,732
	Reclassification of net gains to net income:
	Interest income on investment securities (1)	(3		)	1		(2		)		(15	)		6		(9	)
	Net gains on debt securities	(278		)	105		(173		)		(83	)		31		(52	)
	Net gains from equity investments	(19		)	7		(12		)		(296	)		112		(184	)
	Subtotal reclassifications to net income	(300		)	113		(187		)		(394	)		149		(245	)
	Net change	93			66		159				2,331			(844	)	1,487
	Derivatives and hedging activities:
	Net unrealized gains arising during the period	952			(359	)	593				44			(17	)	27
	Reclassification of net (gains) losses to net income:
	Interest income on loans	(237		)	89		(148		)		(124	)		47		(77	)
	Interest expense on long-term debt	4			(1	)	3				18			(7	)	11
	Interest income on investment securities	(1		)	1		—				—			—		—
	Subtotal reclassifications to net income	(234		)	89		(145		)		(106	)		40		(66	)
	Net change	718			(270	)	448				(62	)		23		(39	)
	Defined benefit plans adjustments:
	Net actuarial losses arising during the period	(11		)	4		(7		)		—			—		—
	Reclassification of amounts to net periodic benefit costs (2):
	Amortization of net actuarial loss	31			(12	)	19				19			(7	)	12
	Settlements and other	12			(5	)	7				(1	)		—		(1	)
	Subtotal reclassifications to net periodic benefit costs	43			(17	)	26				18			(7	)	11
	Net change	32			(13	)	19				18			(7	)	11
	Foreign currency translation adjustments:
	Net unrealized losses arising during the period	(55		)	(11	)	(66		)		(17	)		(3	)	(20	)
	Reclassification of net losses to net income:
	Noninterest income	—			—		—				6			—		6
	Net change	(55		)	(11	)	(66		)		(11	)		(3	)	(14	)
	Other comprehensive income	$	788		(228	)	560				2,276			(831	)	1,445
	Less: Other comprehensive income from noncontrolling interests, net of tax						301									79
	Wells Fargo other comprehensive income, net of tax						$	259								1,366
	-1	Represents net unrealized gains amortized over the remaining lives of securities that were transferred from the available-for-sale portfolio to the held-to-maturity portfolio.
	-2	These items are included in the computation of net periodic benefit cost, which is recorded in employee benefits expense (see Note 15 (Employee Benefits) for additional details).
Cumulative other comprehensive income	Cumulative OCI balances were:
	(in millions)	Investment			Derivatives		Defined			Foreign			Cumulative
		securities			and		benefit			currency			other
					hedging		plans			translation			compre-
					activities		adjustments			adjustments			hensive
													income
	Quarter ended March 31, 2015
	Balance, beginning of period	$	4,926		333		(1,703	)		(38	)		3,518
	Net unrealized gains (losses) arising during the period	346			593		(7	)		(66	)		866
	Amounts reclassified from accumulated other comprehensive income	(187		)	(145	)	26			—			(306	)
	Net change	159			448		19			(66	)		560
	Less: Other comprehensive income from noncontrolling interests	301			—		—			—			301
	Balance, end of period	$	4,784		781		(1,684	)		(104	)		3,777
	Quarter ended March 31, 2014
	Balance, beginning of period	$	2,338		80		(1,053	)		21			1,386
	Net unrealized gains (losses) arising during the period	1,732			27		—			(20	)		1,739
	Amounts reclassified from accumulated other comprehensive income	(245		)	(66	)	11			6			(294	)
	Net change	1,487			(39	)	11			(14	)		1,445
	Less: Other comprehensive income from noncontrolling interests	79			—		—			—			79
	Balance, end of period	$	3,746		41		(1,042	)		7			2,752

Operating_Segments_Tables

Operating Segments (Tables)	3 Months Ended
	Mar. 31, 2015
Segment Reporting [Abstract]
Financial Information of Operating Segment
		Community			Wholesale				Wealth,				Other (1)				Consolidated
		Banking			Banking				Brokerage								Company
									and
									Retirement
	(income/expense in millions, average balances in billions)	2015		2014	2015		2014		2015		2014		2015		2014		2015	2014
	Quarter ended March 31,
	Net interest income (2)	$	7,561	7,275	2,921		2,891		861		768		(357	)	(319	)	10,986	10,615
	Provision (reversal of provision) for credit losses	617		419	(6	)	(93	)	(3	)	(8	)	—		7		608	325
	Noninterest income	5,223		5,318	2,991		2,689		2,872		2,700		(794	)	(697	)	10,292	10,010
	Noninterest expense	7,064		6,774	3,409		3,215		2,831		2,711		(797	)	(752	)	12,507	11,948
	Income (loss) before income tax expense (benefit)	5,103		5,400	2,509		2,458		905		765		(354	)	(271	)	8,163	8,352
	Income tax expense (benefit)	1,364		1,376	706		714		344		290		(135	)	(103	)	2,279	2,277
	Net income (loss) before noncontrolling interests	3,739		4,024	1,803		1,744		561		475		(219	)	(168	)	5,884	6,075
	Less: Net income (loss) from noncontrolling interests	74		180	6		2		—		—		—		—		80	182
	Net income (loss) (3)	$	3,665	3,844	1,797		1,742		561		475		(219	)	(168	)	5,804	5,893
	Average loans	$	506.4	505	337.6		301.9		56.9		50		(37.6	)	(33.1	)	863.3	823.8
	Average assets	993.1		892.6	594.9		517.4		195.7		190.6		(75.9	)	(74.7	)	1,707.80	1,525.90
	Average core deposits	668.9		626.5	303.4		259		161.4		156		(70.5	)	(67.7	)	1,063.20	973.8
	-1	Includes items not specific to a business segment and elimination of certain items that are included in more than one business segment, substantially all of which represents products and services for wealth management customers provided in Community Banking stores.
	-2	Net interest income is the difference between interest earned on assets and the cost of liabilities to fund those assets. Interest earned includes actual interest earned on segment assets and, if the segment has excess liabilities, interest credits for providing funding to other segments. The cost of liabilities includes interest expense on segment liabilities and, if the segment does not have enough liabilities to fund its assets, a funding charge based on the cost of excess liabilities from another segment.
	-3	Represents segment net income (loss) for Community Banking; Wholesale Banking; and Wealth, Brokerage and Retirement segments and Wells Fargo net income for the consolidated company.

Regulatory_and_Agency_Capital_1

Regulatory and Agency Capital Requirements (Tables)	3 Months Ended
	Mar. 31, 2015
Banking and Thrift [Abstract]
Regulatory And Agency Capital Requirements	The following table presents regulatory capital information for Wells Fargo & Company and the Bank using Basel III, which increased minimum required capital ratios, and introduced a minimum Common Equity Tier 1 (CET1) ratio. Information presented for March 31, 2015, reflects the transition to determining risk-weighted assets (RWAs) under the Basel III Standardized Approach with Transition Requirements from RWAs determined using general risk-based capital rules (General Approach) effective in 2014. The Standardized and General Approaches each apply assigned risk weights to broad risk categories but many of the risk categories and/or weights were changed by Basel III for the Standardized Approach and will generally result in higher risk-weighted assets than from those prescribed for the General Approach. We have been approved by federal banking regulators, starting in second quarter 2015, to use the Advanced Approach capital framework, which involves using our internal risk models to determine RWAs and satisfying specific risk-measurement and risk-management criteria when calculating our risk-based capital requirements. The Basel III revised definition of capital, and changes are being phased-in effective January 1, 2014, through the end of 2021.
	The Bank is an approved seller/servicer of mortgage loans and is required to maintain minimum levels of shareholders’ equity, as specified by various agencies, including the United States Department of Housing and Urban Development, GNMA, FHLMC and FNMA. At March 31, 2015, the Bank met these requirements. Other subsidiaries, including the Company’s insurance and broker-dealer subsidiaries, are also subject to various minimum capital levels, as defined by applicable industry regulations. The minimum capital levels for these subsidiaries, and related restrictions, are not significant to our consolidated operations.
		Wells Fargo & Company				Wells Fargo Bank, N.A.
		Under Basel III				Under Basel III		31-Mar-15
		Standardized			General	Standardized	General	Well-	Minimum
		Approach			Approach	Approach	Approach	capitalized	capital
		Mar 31,			Dec 31,	Mar 31,	Dec 31,	ratios (1)	ratios (1)
	(in billions, except ratios)	2015			2014	2015	2014
	Regulatory capital:
	Common equity tier 1	$	139.2		137.1	121.1	119.9
	Tier 1	158.8			154.7	121.1	119.9
	Total	196.2			192.9	144.9	144
	Assets:
	Risk-weighted	$	1,301.50		1,242.50	1,177.70	1,142.50
	Adjusted average (2)	1,675.70			1,637.00	1,523.00	1,487.60
	Regulatory capital ratios:
	Common equity tier 1 capital	10.69		%	11.04	10.28	10.49	6.5	4.5
	Tier 1 capital	12.2			12.45	10.28	10.49	8	6
	Total capital	15.08			15.53	12.31	12.61	10	8
	Tier 1 leverage (2)	9.48			9.45	7.95	8.06	5	4
	-1	As defined by the regulations issued by the Federal Reserve, OCC and FDIC.
	-2	The leverage ratio consists of Tier 1 capital divided by quarterly average total assets, excluding goodwill and certain other items. The minimum leverage ratio guideline is 3% for banking organizations that do not anticipate significant growth and that have well-diversified risk, excellent asset quality, high liquidity, good earnings, effective management and monitoring of market risk and, in general, are considered top-rated, strong banking organizations.

Summary_of_Significant_Account3

Summary of Significant Accounting Policies (Details) (USD $)	3 Months Ended		1 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Apr. 30, 2015	Jan. 31, 2015
Supplemental cash flow information - Noncash activities
Trading assets retained from securitization of MHFS	$6,874,000,000	$5,348,000,000
Transfers from loans to MHFS	2,202,000,000	2,602,000,000
Transfers from loans to foreclosed and other assets	911,000,000	1,216,000,000
Transfers from available-for-sale to held-to-maturity securities	4,972,000,000	0
Private Forward Repurchase Transaction [Member]
Summary Of Significant Accounting Policies Textuals [Abstract]
Private forward repurchase contract	$750,000,000			$750,000,000
Subsequent Event [Member] | Private Forward Repurchase Transaction [Member]
Summary Of Significant Accounting Policies Textuals [Abstract]
Common stock repurchased, shares			14,000,000

Business_Combinations_Details

Business Combinations (Details)	3 Months Ended
	Mar. 31, 2015
	business
Business Acquisition [Line Items]
Business acquisition, number completed during period	0
Pending Acquisition [Member]
Business Acquisition [Line Items]
Business acquisition, number completed during period	0

Federal_Funds_Sold_Securities_2

Federal Funds Sold, Securities Purchased under Resale Agreements and Other Short-Term Investments (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
Federal Funds Sold, Securities Purchased under Resale Agreements and Other Short-Term Investments [Line Items]
Federal funds sold and securities purchased under resale agreements	$40,161,000,000	$36,856,000,000
Interest-earning deposits	250,354,000,000	219,220,000,000
Other short-term investments	802,000,000	2,353,000,000
Total	291,317,000,000	258,429,000,000
Federal Funds Sold, Securities Purchased under Resale Agreements and Other Short-Term Investments Textual [Abstract]
Funded contractual commitments	0	0
Unfunded contractual commitments	1,900,000,000	2,600,000,000
Loans [Member]
Federal Funds Sold, Securities Purchased under Resale Agreements and Other Short-Term Investments Textual [Abstract]
Securities purchased under long-term resale agreements	$14,800,000,000	$14,900,000,000

Investment_Securities_Textuals

Investment Securities Textuals (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Investment Securities (Textual) [Abstract]
Cost, available-for-sale securities	$249,676,000,000		$249,653,000,000
Available-for-sale, at fair value	257,603,000,000		257,442,000,000
Held-to-maturity securities	67,133,000,000		55,483,000,000
Held-to-maturity, at fair value	68,781,000,000		56,359,000,000
Gross unrealized losses, investment securities	1,650,000,000		1,943,000,000
Fair value, investment securities	326,384,000,000		313,801,000,000
OTTI write-downs on held-to-maturity securities	0	0
Collateralized debt obligations [Member]
Investment Securities (Textual) [Abstract]
Cost, available-for-sale securities	363,000,000		364,000,000
Available-for-sale, at fair value	487,000,000		500,000,000
Asset-backed Securities Collateralized by Auto Leases or Loans and Cash Reserves [Member]
Investment Securities (Textual) [Abstract]
Held-to-maturity securities	3,100,000,000		3,800,000,000
Held-to-maturity, at fair value	3,100,000,000		3,800,000,000
Asset-backed Securities Collateralized by Dealer Floorplan Loans [Member]
Investment Securities (Textual) [Abstract]
Held-to-maturity securities	1,900,000,000		1,900,000,000
Held-to-maturity, at fair value	2,000,000,000		2,000,000,000
Investment grade [Member]
Investment Securities (Textual) [Abstract]
Available-for-sale, at fair value	69,024,000,000		89,445,000,000
Held-to-maturity, at fair value	11,156,000,000		3,280,000,000
Gross unrealized losses, investment securities	1,424,000,000		1,697,000,000
Fair value, investment securities	80,180,000,000		92,725,000,000
Unrated investment grade securities [Member]
Investment Securities (Textual) [Abstract]
Gross unrealized losses, investment securities	25,000,000		25,000,000
Fair value, investment securities	$2,100,000,000		$1,600,000,000

Investment_Securities_Major_Ca

Investment Securities, Major Categories (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Millions, unless otherwise specified
Available-for-sale securities:
Amortized Cost	$249,676	$249,653
Gross unrealized gains	9,544	9,711
Gross unrealized losses	-1,617	-1,922
Fair value	257,603	257,442
Held-to-maturity securities:
Amortized Cost	67,133	55,483
Gross unrealized gains	1,681	897
Gross unrealized losses	-33	-21
Fair value	68,781	56,359
Total investment securities:
Amortized Cost	316,809	305,136
Gross unrealized gains	11,225	10,608
Gross unrealized losses	-1,650	-1,943
Fair value	326,384	313,801
Total debt securities [Member]
Available-for-sale securities:
Amortized Cost	247,757	247,747
Gross unrealized gains	7,886	7,869
Gross unrealized losses	-1,544	-1,850
Fair value	254,099	253,766
Held-to-maturity securities:
Fair value	68,781	56,359
Securities of U.S. Treasury and federal agencies [Member]
Available-for-sale securities:
Amortized Cost	29,782	25,898
Gross unrealized gains	282	44
Gross unrealized losses	-33	-138
Fair value	30,031	25,804
Held-to-maturity securities:
Amortized Cost	44,244	40,886
Gross unrealized gains	1,441	670
Gross unrealized losses	-9	-8
Fair value	45,676	41,548
Securities of U.S. states and political subdivisions [Member]
Available-for-sale securities:
Amortized Cost	46,973	43,939
Gross unrealized gains	1,342	1,504
Gross unrealized losses	-935	-499
Fair value	47,380	44,944
Held-to-maturity securities:
Amortized Cost	2,092	1,962
Gross unrealized gains	30	27
Gross unrealized losses	-1	0
Fair value	2,121	1,989
Mortgage-backed securities: [Member]
Available-for-sale securities:
Amortized Cost	123,427	132,311
Gross unrealized gains	4,834	4,873
Gross unrealized losses	-332	-832
Fair value	127,929	136,352
Federal agencies [Member]
Available-for-sale securities:
Amortized Cost	100,222	107,850
Gross unrealized gains	3,256	2,990
Gross unrealized losses	-261	-751
Fair value	103,217	110,089
Held-to-maturity securities:
Amortized Cost	14,311	5,476
Gross unrealized gains	182	165
Gross unrealized losses	-21	0
Fair value	14,472	5,641
Residential [Member]
Available-for-sale securities:
Amortized Cost	7,790	8,213
Gross unrealized gains	951	1,080
Gross unrealized losses	-18	-24
Fair value	8,723	9,269
Commercial [Member]
Available-for-sale securities:
Amortized Cost	15,415	16,248
Gross unrealized gains	627	803
Gross unrealized losses	-53	-57
Fair value	15,989	16,994
Corporate debt securities [Member]
Available-for-sale securities:
Amortized Cost	14,508	14,211
Gross unrealized gains	767	745
Gross unrealized losses	-142	-170
Fair value	15,133	14,786
Collateralized loan and other debt obligations [Member]
Available-for-sale securities:
Amortized Cost	27,352	25,137
Gross unrealized gains	448	408
Gross unrealized losses	-78	-184
Fair value	27,722	25,361
Held-to-maturity securities:
Amortized Cost	1,404	1,404
Gross unrealized gains	1	0
Gross unrealized losses	-2	-13
Fair value	1,403	1,391
Other [Member]
Available-for-sale securities:
Amortized Cost	5,715	6,251
Gross unrealized gains	213	295
Gross unrealized losses	-24	-27
Fair value	5,904	6,519
Held-to-maturity securities:
Amortized Cost	5,082	5,755
Gross unrealized gains	27	35
Gross unrealized losses	0	0
Fair value	5,109	5,790
Total marketable equity securities [Member]
Available-for-sale securities:
Amortized Cost	1,919	1,906
Gross unrealized gains	1,658	1,842
Gross unrealized losses	-73	-72
Fair value	3,504	3,676
Perpetual preferred securities [Member]
Available-for-sale securities:
Amortized Cost	1,601	1,622
Gross unrealized gains	163	148
Gross unrealized losses	-72	-70
Fair value	1,692	1,700
Other marketable equity securities [Member]
Available-for-sale securities:
Amortized Cost	318	284
Gross unrealized gains	1,495	1,694
Gross unrealized losses	-1	-2
Fair value	$1,812	$1,976

Investment_Securities_Gross_Un

Investment Securities, Gross Unrealized Losses and Fair Value (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Millions, unless otherwise specified
Available-for-sale securities:
Less than 12 months, Gross unrealized losses, available-for-sale	($814)	($485)
Less than 12 months, Fair value, available-for-sale	45,713	37,490
12 months or more, Gross unrealized losses, available-for-sale	-803	-1,437
12 months or more, Fair value, available-for-sale	26,384	55,107
Total, Gross unrealized losses, available-for-sale	-1,617	-1,922
Total, Fair value, available-for-sale	72,097	92,597
Held-to-maturity securities:
Less than 12 months, Gross unrealized losses, held-to-maturity	-33	-21
Less than 12 months, Fair value, held-to-maturity	11,156	3,280
12 months or more, Gross unrealized losses, held-to-maturity	0	0
12 months or more, Fair value, held-to-maturity	0	0
Total, Gross unrealized losses, held-to-maturity	-33	-21
Total, Fair value, held-to-maturity	11,156	3,280
Total investment securities:
Less than 12 months, Gross unrealized losses, investment securities	-847	-506
Less than 12 months, Fair value, investment securities	56,869	40,770
12 months or more, Gross unrealized losses, investment securities	-803	-1,437
12 months or more, Fair value, investment securities	26,384	55,107
Total, Gross unrealized losses, investment securities	-1,650	-1,943
Total, Fair value, investment securities	83,253	95,877
Total debt securities [Member]
Available-for-sale securities:
Less than 12 months, Gross unrealized losses, available-for-sale	-810	-481
Less than 12 months, Fair value, available-for-sale	45,615	37,357
12 months or more, Gross unrealized losses, available-for-sale	-734	-1,369
12 months or more, Fair value, available-for-sale	25,769	54,474
Total, Gross unrealized losses, available-for-sale	-1,544	-1,850
Total, Fair value, available-for-sale	71,384	91,831
Securities of U.S. Treasury and federal agencies [Member]
Available-for-sale securities:
Less than 12 months, Gross unrealized losses, available-for-sale	-7	-16
Less than 12 months, Fair value, available-for-sale	1,722	7,138
12 months or more, Gross unrealized losses, available-for-sale	-26	-122
12 months or more, Fair value, available-for-sale	4,013	5,719
Total, Gross unrealized losses, available-for-sale	-33	-138
Total, Fair value, available-for-sale	5,735	12,857
Held-to-maturity securities:
Less than 12 months, Gross unrealized losses, held-to-maturity	-9	-8
Less than 12 months, Fair value, held-to-maturity	1,529	1,889
12 months or more, Gross unrealized losses, held-to-maturity	0	0
12 months or more, Fair value, held-to-maturity	0	0
Total, Gross unrealized losses, held-to-maturity	-9	-8
Total, Fair value, held-to-maturity	1,529	1,889
Securities of U.S. states and political subdivisions [Member]
Available-for-sale securities:
Less than 12 months, Gross unrealized losses, available-for-sale	-579	-198
Less than 12 months, Fair value, available-for-sale	17,860	10,228
12 months or more, Gross unrealized losses, available-for-sale	-356	-301
12 months or more, Fair value, available-for-sale	3,685	3,725
Total, Gross unrealized losses, available-for-sale	-935	-499
Total, Fair value, available-for-sale	21,545	13,953
Held-to-maturity securities:
Less than 12 months, Gross unrealized losses, held-to-maturity	-1
Less than 12 months, Fair value, held-to-maturity	298
12 months or more, Gross unrealized losses, held-to-maturity	0
12 months or more, Fair value, held-to-maturity	0
Total, Gross unrealized losses, held-to-maturity	-1
Total, Fair value, held-to-maturity	298
Mortgage-backed securities: [Member]
Available-for-sale securities:
Less than 12 months, Gross unrealized losses, available-for-sale	-96	-43
Less than 12 months, Fair value, available-for-sale	17,647	4,854
12 months or more, Gross unrealized losses, available-for-sale	-236	-789
12 months or more, Fair value, available-for-sale	13,160	39,530
Total, Gross unrealized losses, available-for-sale	-332	-832
Total, Fair value, available-for-sale	30,807	44,384
Federal agencies [Member]
Available-for-sale securities:
Less than 12 months, Gross unrealized losses, available-for-sale	-73	-16
Less than 12 months, Fair value, available-for-sale	14,416	1,706
12 months or more, Gross unrealized losses, available-for-sale	-188	-735
12 months or more, Fair value, available-for-sale	11,410	37,854
Total, Gross unrealized losses, available-for-sale	-261	-751
Total, Fair value, available-for-sale	25,826	39,560
Held-to-maturity securities:
Less than 12 months, Gross unrealized losses, held-to-maturity	-21
Less than 12 months, Fair value, held-to-maturity	8,100
12 months or more, Gross unrealized losses, held-to-maturity	0
12 months or more, Fair value, held-to-maturity	0
Total, Gross unrealized losses, held-to-maturity	-21
Total, Fair value, held-to-maturity	8,100
Residential [Member]
Available-for-sale securities:
Less than 12 months, Gross unrealized losses, available-for-sale	-12	-18
Less than 12 months, Fair value, available-for-sale	919	946
12 months or more, Gross unrealized losses, available-for-sale	-6	-6
12 months or more, Fair value, available-for-sale	260	144
Total, Gross unrealized losses, available-for-sale	-18	-24
Total, Fair value, available-for-sale	1,179	1,090
Commercial [Member]
Available-for-sale securities:
Less than 12 months, Gross unrealized losses, available-for-sale	-11	-9
Less than 12 months, Fair value, available-for-sale	2,312	2,202
12 months or more, Gross unrealized losses, available-for-sale	-42	-48
12 months or more, Fair value, available-for-sale	1,490	1,532
Total, Gross unrealized losses, available-for-sale	-53	-57
Total, Fair value, available-for-sale	3,802	3,734
Corporate debt securities [Member]
Available-for-sale securities:
Less than 12 months, Gross unrealized losses, available-for-sale	-91	-102
Less than 12 months, Fair value, available-for-sale	1,464	1,674
12 months or more, Gross unrealized losses, available-for-sale	-51	-68
12 months or more, Fair value, available-for-sale	723	1,265
Total, Gross unrealized losses, available-for-sale	-142	-170
Total, Fair value, available-for-sale	2,187	2,939
Collateralized loan and other debt obligations [Member]
Available-for-sale securities:
Less than 12 months, Gross unrealized losses, available-for-sale	-17	-99
Less than 12 months, Fair value, available-for-sale	6,079	12,755
12 months or more, Gross unrealized losses, available-for-sale	-61	-85
12 months or more, Fair value, available-for-sale	3,949	3,958
Total, Gross unrealized losses, available-for-sale	-78	-184
Total, Fair value, available-for-sale	10,028	16,713
Held-to-maturity securities:
Less than 12 months, Gross unrealized losses, held-to-maturity	-2	-13
Less than 12 months, Fair value, held-to-maturity	1,229	1,391
12 months or more, Gross unrealized losses, held-to-maturity	0	0
12 months or more, Fair value, held-to-maturity	0	0
Total, Gross unrealized losses, held-to-maturity	-2	-13
Total, Fair value, held-to-maturity	1,229	1,391
Other [Member]
Available-for-sale securities:
Less than 12 months, Gross unrealized losses, available-for-sale	-20	-23
Less than 12 months, Fair value, available-for-sale	843	708
12 months or more, Gross unrealized losses, available-for-sale	-4	-4
12 months or more, Fair value, available-for-sale	239	277
Total, Gross unrealized losses, available-for-sale	-24	-27
Total, Fair value, available-for-sale	1,082	985
Total marketable equity securities [Member]
Available-for-sale securities:
Less than 12 months, Gross unrealized losses, available-for-sale	-4	-4
Less than 12 months, Fair value, available-for-sale	98	133
12 months or more, Gross unrealized losses, available-for-sale	-69	-68
12 months or more, Fair value, available-for-sale	615	633
Total, Gross unrealized losses, available-for-sale	-73	-72
Total, Fair value, available-for-sale	713	766
Perpetual preferred securities [Member]
Available-for-sale securities:
Less than 12 months, Gross unrealized losses, available-for-sale	-3	-2
Less than 12 months, Fair value, available-for-sale	82	92
12 months or more, Gross unrealized losses, available-for-sale	-69	-68
12 months or more, Fair value, available-for-sale	615	633
Total, Gross unrealized losses, available-for-sale	-72	-70
Total, Fair value, available-for-sale	697	725
Other marketable equity securities [Member]
Available-for-sale securities:
Less than 12 months, Gross unrealized losses, available-for-sale	-1	-2
Less than 12 months, Fair value, available-for-sale	16	41
12 months or more, Gross unrealized losses, available-for-sale	0	0
12 months or more, Fair value, available-for-sale	0	0
Total, Gross unrealized losses, available-for-sale	-1	-2
Total, Fair value, available-for-sale	$16	$41

Investment_Securities_Unrealiz

Investment Securities, Unrealized Loss Position, by Credit Rating (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Millions, unless otherwise specified
Available-for-sale securities:
Gross unrealized losses	($1,617)	($1,922)
Fair value	257,603	257,442
Held-to-maturity securities:
Gross unrealized losses	-33	-21
Fair value	68,781	56,359
Total investment securities:
Gross unrealized losses	-1,650	-1,943
Fair value	326,384	313,801
Total debt securities [Member]
Available-for-sale securities:
Gross unrealized losses	-1,544	-1,850
Fair value	254,099	253,766
Held-to-maturity securities:
Fair value	68,781	56,359
Securities of U.S. Treasury and federal agencies [Member]
Available-for-sale securities:
Gross unrealized losses	-33	-138
Fair value	30,031	25,804
Held-to-maturity securities:
Gross unrealized losses	-9	-8
Fair value	45,676	41,548
Securities of U.S. states and political subdivisions [Member]
Available-for-sale securities:
Gross unrealized losses	-935	-499
Fair value	47,380	44,944
Held-to-maturity securities:
Gross unrealized losses	-1	0
Fair value	2,121	1,989
Mortgage-backed securities: [Member]
Available-for-sale securities:
Gross unrealized losses	-332	-832
Fair value	127,929	136,352
Federal agencies [Member]
Available-for-sale securities:
Gross unrealized losses	-261	-751
Fair value	103,217	110,089
Held-to-maturity securities:
Gross unrealized losses	-21	0
Fair value	14,472	5,641
Residential [Member]
Available-for-sale securities:
Gross unrealized losses	-18	-24
Fair value	8,723	9,269
Commercial [Member]
Available-for-sale securities:
Gross unrealized losses	-53	-57
Fair value	15,989	16,994
Corporate debt securities [Member]
Available-for-sale securities:
Gross unrealized losses	-142	-170
Fair value	15,133	14,786
Collateralized loan and other debt obligations [Member]
Available-for-sale securities:
Gross unrealized losses	-78	-184
Fair value	27,722	25,361
Held-to-maturity securities:
Gross unrealized losses	-2	-13
Fair value	1,403	1,391
Other [Member]
Available-for-sale securities:
Gross unrealized losses	-24	-27
Fair value	5,904	6,519
Held-to-maturity securities:
Gross unrealized losses	0	0
Fair value	5,109	5,790
Total marketable equity securities [Member]
Available-for-sale securities:
Gross unrealized losses	-73	-72
Fair value	3,504	3,676
Perpetual preferred securities [Member]
Available-for-sale securities:
Gross unrealized losses	-72	-70
Fair value	1,692	1,700
Investment grade [Member]
Available-for-sale securities:
Gross unrealized losses	-1,391	-1,676
Fair value	69,024	89,445
Held-to-maturity securities:
Gross unrealized losses	-33	-21
Fair value	11,156	3,280
Total investment securities:
Gross unrealized losses	-1,424	-1,697
Fair value	80,180	92,725
Investment grade [Member] | Total debt securities [Member]
Available-for-sale securities:
Gross unrealized losses	-1,319	-1,606
Fair value	68,327	88,720
Investment grade [Member] | Securities of U.S. Treasury and federal agencies [Member]
Available-for-sale securities:
Gross unrealized losses	-33	-138
Fair value	5,735	12,857
Held-to-maturity securities:
Gross unrealized losses	-9	-8
Fair value	1,529	1,889
Investment grade [Member] | Securities of U.S. states and political subdivisions [Member]
Available-for-sale securities:
Gross unrealized losses	-895	-459
Fair value	21,229	13,600
Held-to-maturity securities:
Gross unrealized losses	-1
Fair value	298
Investment grade [Member] | Mortgage-backed securities: [Member]
Available-for-sale securities:
Gross unrealized losses	-287	-775
Fair value	29,383	43,065
Investment grade [Member] | Federal agencies [Member]
Available-for-sale securities:
Gross unrealized losses	-261	-751
Fair value	25,826	39,560
Held-to-maturity securities:
Gross unrealized losses	-21
Fair value	8,100
Investment grade [Member] | Residential [Member]
Available-for-sale securities:
Gross unrealized losses	-1	0
Fair value	134	139
Investment grade [Member] | Commercial [Member]
Available-for-sale securities:
Gross unrealized losses	-25	-24
Fair value	3,423	3,366
Investment grade [Member] | Corporate debt securities [Member]
Available-for-sale securities:
Gross unrealized losses	-16	-39
Fair value	1,186	1,807
Investment grade [Member] | Collateralized loan and other debt obligations [Member]
Available-for-sale securities:
Gross unrealized losses	-68	-172
Fair value	9,947	16,609
Held-to-maturity securities:
Gross unrealized losses	-2	-13
Fair value	1,229	1,391
Investment grade [Member] | Other [Member]
Available-for-sale securities:
Gross unrealized losses	-20	-23
Fair value	847	782
Investment grade [Member] | Perpetual preferred securities [Member]
Available-for-sale securities:
Gross unrealized losses	-72	-70
Fair value	697	725
Non-investment grade [Member]
Available-for-sale securities:
Gross unrealized losses	-225	-244
Fair value	3,057	3,111
Held-to-maturity securities:
Gross unrealized losses	0	0
Fair value	0	0
Total investment securities:
Gross unrealized losses	-225	-244
Fair value	3,057	3,111
Non-investment grade [Member] | Total debt securities [Member]
Available-for-sale securities:
Gross unrealized losses	-225	-244
Fair value	3,057	3,111
Non-investment grade [Member] | Securities of U.S. Treasury and federal agencies [Member]
Available-for-sale securities:
Gross unrealized losses	0	0
Fair value	0	0
Held-to-maturity securities:
Gross unrealized losses	0	0
Fair value	0	0
Non-investment grade [Member] | Securities of U.S. states and political subdivisions [Member]
Available-for-sale securities:
Gross unrealized losses	-40	-40
Fair value	316	353
Held-to-maturity securities:
Gross unrealized losses	0
Fair value	0
Non-investment grade [Member] | Mortgage-backed securities: [Member]
Available-for-sale securities:
Gross unrealized losses	-45	-57
Fair value	1,424	1,319
Non-investment grade [Member] | Federal agencies [Member]
Available-for-sale securities:
Gross unrealized losses	0	0
Fair value	0	0
Held-to-maturity securities:
Gross unrealized losses	0
Fair value	0
Non-investment grade [Member] | Residential [Member]
Available-for-sale securities:
Gross unrealized losses	-17	-24
Fair value	1,045	951
Non-investment grade [Member] | Commercial [Member]
Available-for-sale securities:
Gross unrealized losses	-28	-33
Fair value	379	368
Non-investment grade [Member] | Corporate debt securities [Member]
Available-for-sale securities:
Gross unrealized losses	-126	-131
Fair value	1,001	1,132
Non-investment grade [Member] | Collateralized loan and other debt obligations [Member]
Available-for-sale securities:
Gross unrealized losses	-10	-12
Fair value	81	104
Held-to-maturity securities:
Gross unrealized losses	0	0
Fair value	0	0
Non-investment grade [Member] | Other [Member]
Available-for-sale securities:
Gross unrealized losses	-4	-4
Fair value	235	203
Non-investment grade [Member] | Perpetual preferred securities [Member]
Available-for-sale securities:
Gross unrealized losses	0	0
Fair value	$0	$0

Investment_Securities_Contract

Investment Securities, Contractual Maturities (Details) (USD $)	3 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Available-for-sale securities:
Contractual maturities, Total amount, available-for-sale	$254,099	$253,766
Weighted average yield contractual maturities, Total, available-for-sale	3.59%	3.60%
Due within 1 year, Contractual maturities, available-for-sale	4,826	4,647
Percentage of weighted average yield, Due within 1 year, available-for-sale	2.03%	2.03%
Due in 1-5 years, Contractual maturities, available-for-sale	43,701	39,775
Percentage of weighted average yield, Due in 1-5 years, available-for-sale	2.15%	2.20%
Due in 5-10 years, Contractual maturities, available-for-sale	24,109	22,310
Percentage of weighted average yield, Due In 5-10 years, available-for-sale	3.04%	3.12%
Due in 10 years or more, Contractual maturities, available-for-sale	181,463	187,034
Percentage of weighted average yield, Due after 10 years, available-for-sale	4.05%	3.99%
Held-to-maturity securities:
Amortized Cost	67,133	55,483
Weighted average yield contractual maturities, Total, held-to-maturity, cost	2.47%	2.37%
Due within 1 year, Contractual maturities, held-to-maturity, cost	200	192
Percentage of weighted average yield, Due In 1 year, held-to-maturity, cost	1.62%	1.61%
Held-to-maturity Securities, Debt Maturities, after One Through Five Years, Net Carrying Amount	3,553	4,214
Percentage of weighted average yield, Due In 1-5 years, held-to-maturity, cost	1.62%	1.72%
Due in 5-10 years, Contractual maturities, held-to-maturity, cost	45,638	42,244
Percentage of weighted average yield, Due In 5-10 years, held-to-maturity, cost	2.11%	2.10%
Due in 10 years or more, Contractual maturities, held-to-maturity, cost	17,742	8,833
Percentage of weighted average yield, Due after 10 years, held-to-maturity, cost	3.60%	3.96%
Held-to-maturity securities, fair value: [Abstract]
Contractual maturities, Total amount, held-to-maturity, fair value	68,781	56,359
Total debt securities [Member]
Held-to-maturity securities, fair value: [Abstract]
Contractual maturities, Total amount, held-to-maturity, fair value	68,781	56,359
Due within 1 year, Contractual maturities, held-to-maturity, fair value	201	193
Due in 1-5 years, Contractual maturities, held-to-maturity, fair value	3,574	4,239
Due in 5-10 years, Contractual maturities, held-to-maturity, fair value	47,077	42,915
Due in 10 years or more, Contractual maturities, held-to-maturity, fair value	17,929	9,012
Securities of U.S. Treasury and federal agencies [Member]
Available-for-sale securities:
Contractual maturities, Total amount, available-for-sale	30,031	25,804
Weighted average yield contractual maturities, Total, available-for-sale	1.47%	1.49%
Due within 1 year, Contractual maturities, available-for-sale	56	181
Percentage of weighted average yield, Due within 1 year, available-for-sale	1.09%	1.47%
Due in 1-5 years, Contractual maturities, available-for-sale	26,702	22,348
Percentage of weighted average yield, Due in 1-5 years, available-for-sale	1.42%	1.44%
Due in 5-10 years, Contractual maturities, available-for-sale	3,273	3,275
Percentage of weighted average yield, Due In 5-10 years, available-for-sale	1.85%	1.83%
Due in 10 years or more, Contractual maturities, available-for-sale	0	0
Percentage of weighted average yield, Due after 10 years, available-for-sale	0.00%	0.00%
Held-to-maturity securities:
Amortized Cost	44,244	40,886
Weighted average yield contractual maturities, Total, held-to-maturity, cost	2.12%	2.12%
Due within 1 year, Contractual maturities, held-to-maturity, cost	0	0
Percentage of weighted average yield, Due In 1 year, held-to-maturity, cost	0.00%	0.00%
Held-to-maturity Securities, Debt Maturities, after One Through Five Years, Net Carrying Amount	0	0
Percentage of weighted average yield, Due In 1-5 years, held-to-maturity, cost	0.00%	0.00%
Due in 5-10 years, Contractual maturities, held-to-maturity, cost	44,244	40,886
Percentage of weighted average yield, Due In 5-10 years, held-to-maturity, cost	2.12%	2.12%
Due in 10 years or more, Contractual maturities, held-to-maturity, cost	0	0
Percentage of weighted average yield, Due after 10 years, held-to-maturity, cost	0.00%	0.00%
Held-to-maturity securities, fair value: [Abstract]
Contractual maturities, Total amount, held-to-maturity, fair value	45,676	41,548
Due within 1 year, Contractual maturities, held-to-maturity, fair value	0	0
Due in 1-5 years, Contractual maturities, held-to-maturity, fair value	0	0
Due in 5-10 years, Contractual maturities, held-to-maturity, fair value	45,676	41,548
Due in 10 years or more, Contractual maturities, held-to-maturity, fair value	0	0
Securities of U.S. states and political subdivisions [Member]
Available-for-sale securities:
Contractual maturities, Total amount, available-for-sale	47,380	44,944
Weighted average yield contractual maturities, Total, available-for-sale	5.72%	5.66%
Due within 1 year, Contractual maturities, available-for-sale	3,820	3,568
Percentage of weighted average yield, Due within 1 year, available-for-sale	1.71%	1.71%
Due in 1-5 years, Contractual maturities, available-for-sale	6,469	7,050
Percentage of weighted average yield, Due in 1-5 years, available-for-sale	2.26%	2.19%
Due in 5-10 years, Contractual maturities, available-for-sale	3,179	3,235
Percentage of weighted average yield, Due In 5-10 years, available-for-sale	5.21%	5.13%
Due in 10 years or more, Contractual maturities, available-for-sale	33,912	31,091
Percentage of weighted average yield, Due after 10 years, available-for-sale	6.87%	6.96%
Held-to-maturity securities:
Amortized Cost	2,092	1,962
Weighted average yield contractual maturities, Total, held-to-maturity, cost	5.70%	5.60%
Due within 1 year, Contractual maturities, held-to-maturity, cost	0	0
Percentage of weighted average yield, Due In 1 year, held-to-maturity, cost	0.00%	0.00%
Held-to-maturity Securities, Debt Maturities, after One Through Five Years, Net Carrying Amount	0	0
Percentage of weighted average yield, Due In 1-5 years, held-to-maturity, cost	0.00%	0.00%
Due in 5-10 years, Contractual maturities, held-to-maturity, cost	65	9
Percentage of weighted average yield, Due In 5-10 years, held-to-maturity, cost	7.70%	6.60%
Due in 10 years or more, Contractual maturities, held-to-maturity, cost	2,027	1,953
Percentage of weighted average yield, Due after 10 years, held-to-maturity, cost	5.64%	5.59%
Held-to-maturity securities, fair value: [Abstract]
Contractual maturities, Total amount, held-to-maturity, fair value	2,121	1,989
Due within 1 year, Contractual maturities, held-to-maturity, fair value	0	0
Due in 1-5 years, Contractual maturities, held-to-maturity, fair value	0	0
Due in 5-10 years, Contractual maturities, held-to-maturity, fair value	67	9
Due in 10 years or more, Contractual maturities, held-to-maturity, fair value	2,054	1,980
Mortgage-backed securities: [Member]
Available-for-sale securities:
Contractual maturities, Total amount, available-for-sale	127,929	136,352
Weighted average yield contractual maturities, Total, available-for-sale	3.60%	3.59%
Due within 1 year, Contractual maturities, available-for-sale	0	1
Percentage of weighted average yield, Due within 1 year, available-for-sale	0.00%	0.28%
Due in 1-5 years, Contractual maturities, available-for-sale	473	347
Percentage of weighted average yield, Due in 1-5 years, available-for-sale	2.12%	2.88%
Due in 5-10 years, Contractual maturities, available-for-sale	784	1,099
Percentage of weighted average yield, Due In 5-10 years, available-for-sale	4.14%	3.54%
Due in 10 years or more, Contractual maturities, available-for-sale	126,672	134,905
Percentage of weighted average yield, Due after 10 years, available-for-sale	3.60%	3.59%
Federal agencies [Member]
Available-for-sale securities:
Contractual maturities, Total amount, available-for-sale	103,217	110,089
Weighted average yield contractual maturities, Total, available-for-sale	3.27%	3.27%
Due within 1 year, Contractual maturities, available-for-sale	0	0
Percentage of weighted average yield, Due within 1 year, available-for-sale	0.00%	0.00%
Due in 1-5 years, Contractual maturities, available-for-sale	399	276
Percentage of weighted average yield, Due in 1-5 years, available-for-sale	1.94%	2.86%
Due in 5-10 years, Contractual maturities, available-for-sale	712	1,011
Percentage of weighted average yield, Due In 5-10 years, available-for-sale	3.99%	3.38%
Due in 10 years or more, Contractual maturities, available-for-sale	102,106	108,802
Percentage of weighted average yield, Due after 10 years, available-for-sale	3.27%	3.27%
Held-to-maturity securities:
Amortized Cost	14,311	5,476
Weighted average yield contractual maturities, Total, held-to-maturity, cost	3.47%	3.89%
Due within 1 year, Contractual maturities, held-to-maturity, cost	0	0
Percentage of weighted average yield, Due In 1 year, held-to-maturity, cost	0.00%	0.00%
Held-to-maturity Securities, Debt Maturities, after One Through Five Years, Net Carrying Amount	0	0
Percentage of weighted average yield, Due In 1-5 years, held-to-maturity, cost	0.00%	0.00%
Due in 5-10 years, Contractual maturities, held-to-maturity, cost	0	0
Percentage of weighted average yield, Due In 5-10 years, held-to-maturity, cost	0.00%	0.00%
Due in 10 years or more, Contractual maturities, held-to-maturity, cost	14,311	5,476
Percentage of weighted average yield, Due after 10 years, held-to-maturity, cost	3.47%	3.89%
Held-to-maturity securities, fair value: [Abstract]
Contractual maturities, Total amount, held-to-maturity, fair value	14,472	5,641
Due within 1 year, Contractual maturities, held-to-maturity, fair value	0	0
Due in 1-5 years, Contractual maturities, held-to-maturity, fair value	0	0
Due in 5-10 years, Contractual maturities, held-to-maturity, fair value	0	0
Due in 10 years or more, Contractual maturities, held-to-maturity, fair value	14,472	5,641
Residential [Member]
Available-for-sale securities:
Contractual maturities, Total amount, available-for-sale	8,723	9,269
Weighted average yield contractual maturities, Total, available-for-sale	4.52%	4.50%
Due within 1 year, Contractual maturities, available-for-sale	0	0
Percentage of weighted average yield, Due within 1 year, available-for-sale	0.00%	0.00%
Due in 1-5 years, Contractual maturities, available-for-sale	14	9
Percentage of weighted average yield, Due in 1-5 years, available-for-sale	5.10%	4.81%
Due in 5-10 years, Contractual maturities, available-for-sale	72	83
Percentage of weighted average yield, Due In 5-10 years, available-for-sale	5.64%	5.63%
Due in 10 years or more, Contractual maturities, available-for-sale	8,637	9,177
Percentage of weighted average yield, Due after 10 years, available-for-sale	4.51%	4.49%
Commercial [Member]
Available-for-sale securities:
Contractual maturities, Total amount, available-for-sale	15,989	16,994
Weighted average yield contractual maturities, Total, available-for-sale	5.23%	5.16%
Due within 1 year, Contractual maturities, available-for-sale	0	1
Percentage of weighted average yield, Due within 1 year, available-for-sale	0.00%	0.28%
Due in 1-5 years, Contractual maturities, available-for-sale	60	62
Percentage of weighted average yield, Due in 1-5 years, available-for-sale	2.63%	2.71%
Due in 5-10 years, Contractual maturities, available-for-sale	0	5
Percentage of weighted average yield, Due In 5-10 years, available-for-sale	0.00%	1.30%
Due in 10 years or more, Contractual maturities, available-for-sale	15,929	16,926
Percentage of weighted average yield, Due after 10 years, available-for-sale	5.24%	5.17%
Corporate debt securities [Member]
Available-for-sale securities:
Contractual maturities, Total amount, available-for-sale	15,133	14,786
Weighted average yield contractual maturities, Total, available-for-sale	4.89%	4.90%
Due within 1 year, Contractual maturities, available-for-sale	675	600
Percentage of weighted average yield, Due within 1 year, available-for-sale	4.09%	4.32%
Due in 1-5 years, Contractual maturities, available-for-sale	7,923	7,634
Percentage of weighted average yield, Due in 1-5 years, available-for-sale	4.61%	4.54%
Due in 5-10 years, Contractual maturities, available-for-sale	5,163	5,209
Percentage of weighted average yield, Due In 5-10 years, available-for-sale	5.21%	5.30%
Due in 10 years or more, Contractual maturities, available-for-sale	1,372	1,343
Percentage of weighted average yield, Due after 10 years, available-for-sale	5.71%	5.70%
Collateralized loan and other debt obligations [Member]
Available-for-sale securities:
Contractual maturities, Total amount, available-for-sale	27,722	25,361
Weighted average yield contractual maturities, Total, available-for-sale	1.91%	1.83%
Due within 1 year, Contractual maturities, available-for-sale	0	23
Percentage of weighted average yield, Due within 1 year, available-for-sale	0.00%	1.95%
Due in 1-5 years, Contractual maturities, available-for-sale	857	944
Percentage of weighted average yield, Due in 1-5 years, available-for-sale	0.75%	0.71%
Due in 5-10 years, Contractual maturities, available-for-sale	10,765	8,472
Percentage of weighted average yield, Due In 5-10 years, available-for-sale	1.79%	1.67%
Due in 10 years or more, Contractual maturities, available-for-sale	16,100	15,922
Percentage of weighted average yield, Due after 10 years, available-for-sale	2.05%	1.99%
Held-to-maturity securities:
Amortized Cost	1,404	1,404
Weighted average yield contractual maturities, Total, held-to-maturity, cost	1.97%	1.96%
Due within 1 year, Contractual maturities, held-to-maturity, cost	0	0
Percentage of weighted average yield, Due In 1 year, held-to-maturity, cost	0.00%	0.00%
Held-to-maturity Securities, Debt Maturities, after One Through Five Years, Net Carrying Amount	0	0
Percentage of weighted average yield, Due In 1-5 years, held-to-maturity, cost	0.00%	0.00%
Due in 5-10 years, Contractual maturities, held-to-maturity, cost	0	0
Percentage of weighted average yield, Due In 5-10 years, held-to-maturity, cost	0.00%	0.00%
Due in 10 years or more, Contractual maturities, held-to-maturity, cost	1,404	1,404
Percentage of weighted average yield, Due after 10 years, held-to-maturity, cost	1.97%	1.96%
Held-to-maturity securities, fair value: [Abstract]
Contractual maturities, Total amount, held-to-maturity, fair value	1,403	1,391
Due within 1 year, Contractual maturities, held-to-maturity, fair value	0	0
Due in 1-5 years, Contractual maturities, held-to-maturity, fair value	0	0
Due in 5-10 years, Contractual maturities, held-to-maturity, fair value	0	0
Due in 10 years or more, Contractual maturities, held-to-maturity, fair value	1,403	1,391
Other [Member]
Available-for-sale securities:
Contractual maturities, Total amount, available-for-sale	5,904	6,519
Weighted average yield contractual maturities, Total, available-for-sale	1.80%	1.79%
Due within 1 year, Contractual maturities, available-for-sale	275	274
Percentage of weighted average yield, Due within 1 year, available-for-sale	1.53%	1.55%
Due in 1-5 years, Contractual maturities, available-for-sale	1,277	1,452
Percentage of weighted average yield, Due in 1-5 years, available-for-sale	2.59%	2.56%
Due in 5-10 years, Contractual maturities, available-for-sale	945	1,020
Percentage of weighted average yield, Due In 5-10 years, available-for-sale	1.24%	1.32%
Due in 10 years or more, Contractual maturities, available-for-sale	3,407	3,773
Percentage of weighted average yield, Due after 10 years, available-for-sale	1.68%	1.64%
Held-to-maturity securities:
Amortized Cost	5,082	5,755
Weighted average yield contractual maturities, Total, held-to-maturity, cost	1.56%	1.64%
Due within 1 year, Contractual maturities, held-to-maturity, cost	200	192
Percentage of weighted average yield, Due In 1 year, held-to-maturity, cost	1.62%	1.61%
Held-to-maturity Securities, Debt Maturities, after One Through Five Years, Net Carrying Amount	3,553	4,214
Percentage of weighted average yield, Due In 1-5 years, held-to-maturity, cost	1.62%	1.72%
Due in 5-10 years, Contractual maturities, held-to-maturity, cost	1,329	1,349
Percentage of weighted average yield, Due In 5-10 years, held-to-maturity, cost	1.40%	1.41%
Due in 10 years or more, Contractual maturities, held-to-maturity, cost	0	0
Percentage of weighted average yield, Due after 10 years, held-to-maturity, cost	0.00%	0.00%
Held-to-maturity securities, fair value: [Abstract]
Contractual maturities, Total amount, held-to-maturity, fair value	5,109	5,790
Due within 1 year, Contractual maturities, held-to-maturity, fair value	201	193
Due in 1-5 years, Contractual maturities, held-to-maturity, fair value	3,574	4,239
Due in 5-10 years, Contractual maturities, held-to-maturity, fair value	1,334	1,358
Due in 10 years or more, Contractual maturities, held-to-maturity, fair value	$0	$0

Investment_Securities_Realized

Investment Securities, Realized Gains and Losses (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Marketable Securities, Realized Gain (Loss) [Abstract]
Gross realized gains	$348	$391
Gross realized losses	-20	-3
OTTI write-downs	-31	-9
Net realized gains from available-for-sale securities	297	379
Net realized gains from nonmarketable equity investments	351	551
Net realized gains from debt securities and equity investments	$648	$930

Investment_Securities_OTTI_Inc

Investment Securities, OTTI Included in Earnings (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
OTTI write-downs included in earnings (Abstract)
Total investment securities	$31	$9
Nonmarketable equity investments	42	126
Total OTTI write-downs included in earnings	73	135
Total debt securities [Member]
OTTI write-downs included in earnings (Abstract)
Total investment securities	31	7
Securities of U.S. states and political subdivisions [Member]
OTTI write-downs included in earnings (Abstract)
Total investment securities	16	0
Residential [Member]
OTTI write-downs included in earnings (Abstract)
Total investment securities	15	5
Commercial [Member]
OTTI write-downs included in earnings (Abstract)
Total investment securities	0	2
Total marketable equity securities [Member]
OTTI write-downs included in earnings (Abstract)
Total investment securities	0	2
Other marketable equity securities [Member]
OTTI write-downs included in earnings (Abstract)
Total investment securities	$0	$2

Investment_Securities_OTTI_Deb

Investment Securities, OTTI Debt Securities (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
OTTI on debt securities (Abstract)
Total recorded as part of gross realized losses	$31	$9
Total debt securities [Member]
OTTI on debt securities (Abstract)
Total recorded as part of gross realized losses	31	7
Total changes to OCI for non-credit-related OTTI	-37	-21
Total OTTI losses (reversal of losses) recorded on debt securities	-6	-14
Total debt securities [Member] | Credit-related OTTI [Member]
OTTI on debt securities (Abstract)
Total recorded as part of gross realized losses	20	7
Total debt securities [Member] | Intent-to-sell OTTI [Member]
OTTI on debt securities (Abstract)
Total recorded as part of gross realized losses	11	0
Securities of U.S. states and political subdivisions [Member]
OTTI on debt securities (Abstract)
Total recorded as part of gross realized losses	16	0
Total changes to OCI for non-credit-related OTTI	-1	0
Residential [Member]
OTTI on debt securities (Abstract)
Total recorded as part of gross realized losses	15	5
Total changes to OCI for non-credit-related OTTI	-21	-9
Commercial Mortgage Backed Securities [Member]
OTTI on debt securities (Abstract)
Total recorded as part of gross realized losses	0	2
Total changes to OCI for non-credit-related OTTI	($15)	($12)

Investment_Securities_Credit_L

Investment Securities, Credit Loss Component (Details) (Total debt securities [Member], USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Total debt securities [Member]
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward]
Credit loss recognized, beginning of year	$1,025	$1,171
Additions:
For securities with previous credit impairments	20	7
Total additions	20	7
Reductions:
For securities sold, matured, or intended/required to be sold	-14	-29
For recoveries of previous credit impairments	-2	-6
Total reductions	-16	-35
Credit loss recognized, end of year	$1,029	$1,143

Loans_and_Allowance_for_Credit2

Loans and Allowance for Credit Losses Textual (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014	Dec. 31, 2008
Accounts Notes Loans And Financing Receivable (Textual) [Abstract]
Unearned income, net deferred loan fees and unamortized discount and premium	$4,200,000,000		$4,500,000,000
Temporary advance arrangements	89,000,000,000		87,000,000,000
Commercial letters of credit, international trade	1,000,000,000		1,200,000,000
Allowance for credit losses, PCI loans	9,000,000	21,000,000	11,000,000
Nonaccrual loans	12,510,000,000		12,848,000,000
90 days or more past due and still accruing	16,344,000,000		17,810,000,000
High value properties, threshold ($1 million or more)	1,000,000
Impaired loans	25,082,000,000		25,408,000,000
Total unfunded loan commitments on troubled debt restructurings	310,000,000		341,000,000
Loans remodified	522,000,000	612,000,000
Financing receivable modifications, principal forgiven	26,000,000	48,000,000
Purchased Credit Impaired Loans (carrying value)	22,389,000,000		23,320,000,000
Total PCI loans (unpaid principal balance)	31,596,000,000		32,924,000,000	98,182,000,000
Home Affordable Modification Program [Member]
Accounts Notes Loans And Financing Receivable (Textual) [Abstract]
Impaired loans	139,000,000		149,000,000
Second Lien Modification Program [Member]
Accounts Notes Loans And Financing Receivable (Textual) [Abstract]
Impaired loans	36,000,000		34,000,000
Proprietary Program [Member]
Accounts Notes Loans And Financing Receivable (Textual) [Abstract]
Impaired loans	257,000,000		269,000,000
Purchased Credit-Impaired Loans [Member]
Accounts Notes Loans And Financing Receivable (Textual) [Abstract]
90 days or more past due and still accruing	3,600,000,000		3,700,000,000
Trial modifications [Member]
Accounts Notes Loans And Financing Receivable (Textual) [Abstract]
Impaired loans	432,000,000		452,000,000
Trial modifications [Member] | Financing Receivable Accruing [Member]
Accounts Notes Loans And Financing Receivable (Textual) [Abstract]
Impaired loans	155,000,000		167,000,000
Trial modifications [Member] | Financing Receivable Nonaccruing [Member]
Accounts Notes Loans And Financing Receivable (Textual) [Abstract]
Impaired loans	277,000,000		285,000,000
In process of foreclosure [Member]
Accounts Notes Loans And Financing Receivable (Textual) [Abstract]
Recorded investment amount in consumer mortgage loans collateralized by residential real estate property	12,400,000,000		12,700,000,000
Consumer Loans Exempt Under Regulatory Rules [Member]
Accounts Notes Loans And Financing Receivable (Textual) [Abstract]
Nonperforming status threshold	120 days
Commercial Real Estate Mortgage and Construction Loans [Member] | Criticized [Member]
Accounts Notes Loans And Financing Receivable (Textual) [Abstract]
Loans, excluding Purchased Credit Impaired Loans	7,500,000,000
Nonaccrual loans	1,500,000,000
FHA Insured/VA Guaranteed [Member]
Accounts Notes Loans And Financing Receivable (Textual) [Abstract]
Financing receivable, certain purchases net of certain transfers to held for sale	1,100,000,000	1,500,000,000
90 days or more past due and still accruing	15,453,000,000		16,827,000,000
FHA Insured/VA Guaranteed [Member] | Impaired Loans [Member]
Accounts Notes Loans And Financing Receivable (Textual) [Abstract]
Government insured/guaranteed loans	2,100,000,000		2,100,000,000
FHA Insured/VA Guaranteed [Member] | Financing Receivable 90 Days Or More Past Due [Member]
Accounts Notes Loans And Financing Receivable (Textual) [Abstract]
Government insured/guaranteed loans	15,000,000,000		16,200,000,000
FHA Insured/VA Guaranteed [Member] | In process of foreclosure [Member]
Accounts Notes Loans And Financing Receivable (Textual) [Abstract]
Recorded investment amount in consumer mortgage loans collateralized by residential real estate property	6,500,000,000		6,600,000,000
Student Loans guaranteed under FFELP [Member]
Accounts Notes Loans And Financing Receivable (Textual) [Abstract]
90 days or more past due and still accruing	50,000,000		63,000,000
Total Commercial [Member]
Accounts Notes Loans And Financing Receivable (Textual) [Abstract]
Allowance for credit losses, PCI loans	9,000,000		11,000,000
Nonaccrual loans	2,192,000,000		2,239,000,000
Impaired loans	3,702,000,000		3,759,000,000
Nonperforming status threshold	90 days
Purchased Credit Impaired Loans (carrying value)	1,078,000,000		1,507,000,000	18,704,000,000
Total Commercial [Member] | Loans held for sale [Member]
Accounts Notes Loans And Financing Receivable (Textual) [Abstract]
Nonaccrual loans	1,000,000		1,000,000
Total Commercial [Member] | Purchased Credit-Impaired Loans [Member]
Accounts Notes Loans And Financing Receivable (Textual) [Abstract]
90 days or more past due and still accruing	75,000,000		83,000,000
Purchased Credit Impaired Loans (carrying value)	1,078,000,000		1,507,000,000
Total Commercial [Member] | Loans Excluding Certain Loans Acquired In Transfer With Evidence Of Credit Deterioration [Member]
Accounts Notes Loans And Financing Receivable (Textual) [Abstract]
Loans, excluding Purchased Credit Impaired Loans	414,221,000,000		413,319,000,000
Nonaccrual loans	2,192,000,000		2,239,000,000
90 days or more past due and still accruing	74,000,000		47,000,000
Total Commercial [Member] | Criticized [Member] | Purchased Credit-Impaired Loans [Member]
Accounts Notes Loans And Financing Receivable (Textual) [Abstract]
Purchased Credit Impaired Loans (carrying value)	574,000,000		585,000,000
Total Commercial [Member] | Criticized [Member] | Loans Excluding Certain Loans Acquired In Transfer With Evidence Of Credit Deterioration [Member]
Accounts Notes Loans And Financing Receivable (Textual) [Abstract]
Loans, excluding Purchased Credit Impaired Loans	24,104,000,000		25,005,000,000
Total Consumer [Member]
Accounts Notes Loans And Financing Receivable (Textual) [Abstract]
Allowance for credit losses, PCI loans	0		0
Nonaccrual loans	10,318,000,000		10,609,000,000
Loans, 90 days or more past due	6,329,000,000		6,700,000,000
90 days or more past due and still accruing	767,000,000		873,000,000
Impaired loans	21,380,000,000		21,649,000,000
Nonperforming status threshold	60 days
Purchased Credit Impaired Loans (carrying value)	21,311,000,000		21,813,000,000	40,100,000,000
Total Consumer [Member] | Loans Excluding Certain Loans Acquired In Transfer With Evidence Of Credit Deterioration [Member]
Accounts Notes Loans And Financing Receivable (Textual) [Abstract]
Loans, excluding Purchased Credit Impaired Loans	424,621,000,000		425,912,000,000
Government insured/guaranteed loans	25,518,000,000		26,268,000,000
180 or more DPD	4,609,000,000		4,737,000,000
FICO not required	6,067,000,000		5,854,000,000
Real estate 1-4 family first mortgage [Member]
Accounts Notes Loans And Financing Receivable (Textual) [Abstract]
Nonaccrual loans	8,345,000,000		8,583,000,000
180 or more DPD and still accruing, percentage of portfolio	1.70%		1.70%
Impaired loans	18,347,000,000		18,600,000,000
Purchased Credit Impaired Loans (carrying value)	21,223,000,000		21,712,000,000
Real estate 1-4 family first mortgage [Member] | Mortgages held for sale [Member]
Accounts Notes Loans And Financing Receivable (Textual) [Abstract]
Nonaccrual loans	144,000,000		177,000,000
Real estate 1-4 family first mortgage [Member] | Purchased Credit-Impaired Loans [Member]
Accounts Notes Loans And Financing Receivable (Textual) [Abstract]
180 or more DPD	3,596,000,000		3,654,000,000
Purchased Credit Impaired Loans (carrying value)	21,223,000,000		21,712,000,000
Real estate 1-4 family first mortgage [Member] | Loans Excluding Certain Loans Acquired In Transfer With Evidence Of Credit Deterioration [Member]
Accounts Notes Loans And Financing Receivable (Textual) [Abstract]
Loans, excluding Purchased Credit Impaired Loans	243,990,000,000		243,674,000,000
Government insured/guaranteed loans	25,518,000,000		26,268,000,000
180 or more DPD	4,122,000,000		4,258,000,000
FICO not required	$0		$0

Loans_and_Allowance_for_Credit3

Loans and Allowance for Credit Losses, Loans Outstanding (Details) (USD $)	Mar. 31, 2015		Dec. 31, 2014
In Millions, unless otherwise specified
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$861,231	[1]	$862,551	[1]
Total Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	415,299		414,826
Commercial and Industrial Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	271,088		271,795
Commercial Real Estate Mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	111,848		111,996
Commercial Real Estate Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	19,981		18,728
Lease Financing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	12,382		12,307
Total Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	445,932		447,725
Real estate 1-4 family first mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	265,213		265,386
Real estate 1-4 family junior lien mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	57,839		59,717
Credit Card [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	30,078		31,119
Automobile [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	56,339		55,740
Other revolving credit and installment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	36,463		35,763
Geographic Distribution, Foreign [Member] | Total Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	51,044		50,037
Geographic Distribution, Foreign [Member] | Commercial and Industrial Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	45,325		44,707
Geographic Distribution, Foreign [Member] | Commercial Real Estate Mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	5,171		4,776
Geographic Distribution, Foreign [Member] | Commercial Real Estate Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	241		218
Geographic Distribution, Foreign [Member] | Lease Financing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$307		$336
[1]	Parenthetical amounts represent assets and liabilities for which we have elected the fair value option.

Loans_and_Allowance_for_Credit4

Loans and Allowance for Credit Losses, Significant Activity (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Loans and Allowance for Credit Losses, Significant Activity [Abstract]
Purchases	$1,091	$1,182
Sales	-235	-1,691
Transfers to MHFS/LHFS	-9	-40
Commercial Portfolio Segment [Member]
Loans and Allowance for Credit Losses, Significant Activity [Abstract]
Purchases	1,091	1,014
Sales	-206	-1,641
Transfers to MHFS/LHFS	-7	-35
Consumer Portfolio Segment [Member]
Loans and Allowance for Credit Losses, Significant Activity [Abstract]
Purchases	0	168
Sales	-29	-50
Transfers to MHFS/LHFS	($2)	($5)

Loans_and_Allowance_for_Credit5

Loans and Allowance for Credit Losses, Commitments to Lend (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Millions, unless otherwise specified
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total unfunded credit commitments	$507,612	$497,242
Total Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total unfunded credit commitments	302,857	299,817
Commercial and Industrial Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total unfunded credit commitments	280,803	278,093
Commercial Real Estate Mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total unfunded credit commitments	6,359	6,134
Commercial Real Estate Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total unfunded credit commitments	15,692	15,587
Commercial Lease Financing Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total unfunded credit commitments	3	3
Total Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total unfunded credit commitments	204,755	197,425
Real estate 1-4 family first mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total unfunded credit commitments	37,487	32,055
Real estate 1-4 family junior lien mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total unfunded credit commitments	45,196	45,492
Credit Card [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total unfunded credit commitments	96,437	95,062
Other revolving credit and installment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total unfunded credit commitments	$25,635	$24,816

Loans_and_Allowance_for_Credit6

Loans and Allowance for Credit Losses, Allowance for Credit Losses (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for credit losses, beginning balance	$13,169	$14,971
Provision for credit losses	608	325
Interest income on certain impaired loans	-52	-56
Loan charge-offs	-1,096	-1,284
Loan recoveries	388	459
Net loan charge-offs	-708	-825
Allowances related to business combinations/other	-4	-1
Allowance for credit losses, ending balance	13,013	14,414
Components:
Allowance for loan losses	12,176	13,695	12,319
Allowance for unfunded credit commitments	837	719
Total allowance for credit losses	13,013	14,414
Net loan charge-offs (annualized) as a percentage of average total loans	0.33%	0.41%
Allowance for loan losses as a percentage of total loans	1.41%	1.66%
Allowance for credit losses as a percentage of total loans	1.51%	1.74%
Total Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for credit losses, beginning balance	6,377	6,103
Provision for credit losses	9	263
Interest income on certain impaired loans	-5	-6
Loan charge-offs	-160	-188
Loan recoveries	116	183
Net loan charge-offs	-44	-5
Allowances related to business combinations/other	-4	-1
Allowance for credit losses, ending balance	6,333	6,354
Components:
Total allowance for credit losses	6,333	6,354
Commercial and Industrial Loans [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Loan charge-offs	-133	-163
Loan recoveries	69	114
Commercial Real Estate Mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Loan charge-offs	-23	-20
Loan recoveries	34	42
Commercial Real Estate Construction [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Loan charge-offs	-1	-1
Loan recoveries	10	24
Lease Financing [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Loan charge-offs	-3	-4
Loan recoveries	3	3
Total Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for credit losses, beginning balance	6,792	8,868
Provision for credit losses	599	62
Interest income on certain impaired loans	-47	-50
Loan charge-offs	-936	-1,096
Loan recoveries	272	276
Net loan charge-offs	-664	-820
Allowances related to business combinations/other	0	0
Allowance for credit losses, ending balance	6,680	8,060
Components:
Total allowance for credit losses	6,680	8,060
Real estate 1-4 family first mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Loan charge-offs	-130	-223
Loan recoveries	47	53
Real estate 1-4 family junior lien mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Loan charge-offs	-179	-249
Loan recoveries	56	57
Credit Card [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Loan charge-offs	-278	-267
Loan recoveries	39	36
Automobile [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Loan charge-offs	-195	-180
Loan recoveries	94	90
Other revolving credit and installment [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Loan charge-offs	-154	-177
Loan recoveries	$36	$40

Loans_and_Allowance_for_Credit7

Loans and Allowance for Credit Losses, Allowance for Credit Losses by Category (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for credit losses, beginning balance	$13,169	$14,971
Provision for credit losses	608	325
Interest income on certain impaired loans	-52	-56
Loan charge-offs	-1,096	-1,284
Loan recoveries	388	459
Net loan charge-offs	-708	-825
Allowance related to business combinations/other	-4	-1
Allowance for credit losses, ending balance	13,013	14,414
Commercial Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for credit losses, beginning balance	6,377	6,103
Provision for credit losses	9	263
Interest income on certain impaired loans	-5	-6
Loan charge-offs	-160	-188
Loan recoveries	116	183
Net loan charge-offs	-44	-5
Allowance related to business combinations/other	-4	-1
Allowance for credit losses, ending balance	6,333	6,354
Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for credit losses, beginning balance	6,792	8,868
Provision for credit losses	599	62
Interest income on certain impaired loans	-47	-50
Loan charge-offs	-936	-1,096
Loan recoveries	272	276
Net loan charge-offs	-664	-820
Allowance related to business combinations/other	0	0
Allowance for credit losses, ending balance	$6,680	$8,060

Loans_and_Allowance_for_Credit8

Loans and Allowance for Credit Losses, Loans by Credit Impairment Methodology (Details) (USD $)	Mar. 31, 2015		Dec. 31, 2014		Mar. 31, 2014	Dec. 31, 2013	Dec. 31, 2008
In Millions, unless otherwise specified
Loans and Allowance for Credit Losses, by Credit Impairment Method [Abstract]
Allowance for Credit Losses, Collectively evaluated	$9,255		$9,188
Allowance for Credit Losses, Individually evaluated	3,749		3,970
Allowance for credit losses, PCI loans	9		11		21
Total allowance for credit losses	13,013		13,169		14,414	14,971
Financing Receivable, Collectively evaluated	813,760		813,823
Financing Receivable, Individually evaluated	25,082		25,408
Purchased Credit Impaired Loans	22,389		23,320
Loans	861,231	[1]	862,551	[1]
Commercial Portfolio Segment [Member]
Loans and Allowance for Credit Losses, by Credit Impairment Method [Abstract]
Allowance for Credit Losses, Collectively evaluated	5,550		5,482
Allowance for Credit Losses, Individually evaluated	774		884
Allowance for credit losses, PCI loans	9		11
Total allowance for credit losses	6,333		6,377		6,354	6,103
Financing Receivable, Collectively evaluated	410,519		409,560
Financing Receivable, Individually evaluated	3,702		3,759
Purchased Credit Impaired Loans	1,078		1,507				18,704
Loans	415,299		414,826
Consumer Portfolio Segment [Member]
Loans and Allowance for Credit Losses, by Credit Impairment Method [Abstract]
Allowance for Credit Losses, Collectively evaluated	3,705		3,706
Allowance for Credit Losses, Individually evaluated	2,975		3,086
Allowance for credit losses, PCI loans	0		0
Total allowance for credit losses	6,680		6,792		8,060	8,868
Financing Receivable, Collectively evaluated	403,241		404,263
Financing Receivable, Individually evaluated	21,380		21,649
Purchased Credit Impaired Loans	21,311		21,813				40,100
Loans	$445,932		$447,725
[1]	Parenthetical amounts represent assets and liabilities for which we have elected the fair value option.

Loans_and_Allowance_for_Credit9

Loans and Allowance for Credit Losses, Loans by Credit Quality Indicator, Commercial (Details) (USD $)	Mar. 31, 2015		Dec. 31, 2014		Dec. 31, 2008	Dec. 31, 2013
In Millions, unless otherwise specified
Loans and Leases Receivable Disclosure [Abstract]
Purchased Credit Impaired Loans	$22,389		$23,320
Loans	861,231	[1]	862,551	[1]
Total Commercial [Member]
Loans and Leases Receivable Disclosure [Abstract]
Purchased Credit Impaired Loans	1,078		1,507		18,704
Loans	415,299		414,826
Commercial and Industrial Loans [Member]
Loans and Leases Receivable Disclosure [Abstract]
Purchased Credit Impaired Loans	69		75
Loans	271,088		271,795
Commercial Real Estate Mortgage [Member]
Loans and Leases Receivable Disclosure [Abstract]
Purchased Credit Impaired Loans	886		1,261
Loans	111,848		111,996
Commercial Real Estate Construction [Member]
Loans and Leases Receivable Disclosure [Abstract]
Purchased Credit Impaired Loans	123		171
Loans	19,981		18,728
Lease Financing [Member]
Loans and Leases Receivable Disclosure [Abstract]
Purchased Credit Impaired Loans	0		0			0
Loans	12,382		12,307
Loans Excluding Purchased Credit-Impaired Loans [Member] | Total Commercial [Member]
Loans and Leases Receivable Disclosure [Abstract]
Loans, excluding Purchased Credit Impaired Loans	414,221		413,319
Loans Excluding Purchased Credit-Impaired Loans [Member] | Total Commercial [Member] | Pass [Member]
Loans and Leases Receivable Disclosure [Abstract]
Loans, excluding Purchased Credit Impaired Loans	390,117		388,314
Loans Excluding Purchased Credit-Impaired Loans [Member] | Total Commercial [Member] | Criticized [Member]
Loans and Leases Receivable Disclosure [Abstract]
Loans, excluding Purchased Credit Impaired Loans	24,104		25,005
Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial and Industrial Loans [Member]
Loans and Leases Receivable Disclosure [Abstract]
Loans, excluding Purchased Credit Impaired Loans	271,019		271,720
Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial and Industrial Loans [Member] | Pass [Member]
Loans and Leases Receivable Disclosure [Abstract]
Loans, excluding Purchased Credit Impaired Loans	254,884		255,611
Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial and Industrial Loans [Member] | Criticized [Member]
Loans and Leases Receivable Disclosure [Abstract]
Loans, excluding Purchased Credit Impaired Loans	16,135		16,109
Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial Real Estate Mortgage [Member]
Loans and Leases Receivable Disclosure [Abstract]
Loans, excluding Purchased Credit Impaired Loans	110,962		110,735
Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial Real Estate Mortgage [Member] | Pass [Member]
Loans and Leases Receivable Disclosure [Abstract]
Loans, excluding Purchased Credit Impaired Loans	104,252		103,319
Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial Real Estate Mortgage [Member] | Criticized [Member]
Loans and Leases Receivable Disclosure [Abstract]
Loans, excluding Purchased Credit Impaired Loans	6,710		7,416
Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial Real Estate Construction [Member]
Loans and Leases Receivable Disclosure [Abstract]
Loans, excluding Purchased Credit Impaired Loans	19,858		18,557
Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial Real Estate Construction [Member] | Pass [Member]
Loans and Leases Receivable Disclosure [Abstract]
Loans, excluding Purchased Credit Impaired Loans	19,025		17,661
Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial Real Estate Construction [Member] | Criticized [Member]
Loans and Leases Receivable Disclosure [Abstract]
Loans, excluding Purchased Credit Impaired Loans	833		896
Loans Excluding Purchased Credit-Impaired Loans [Member] | Lease Financing [Member]
Loans and Leases Receivable Disclosure [Abstract]
Loans, excluding Purchased Credit Impaired Loans	12,382		12,307
Loans Excluding Purchased Credit-Impaired Loans [Member] | Lease Financing [Member] | Pass [Member]
Loans and Leases Receivable Disclosure [Abstract]
Loans, excluding Purchased Credit Impaired Loans	11,956		11,723
Loans Excluding Purchased Credit-Impaired Loans [Member] | Lease Financing [Member] | Criticized [Member]
Loans and Leases Receivable Disclosure [Abstract]
Loans, excluding Purchased Credit Impaired Loans	$426		$584
[1]	Parenthetical amounts represent assets and liabilities for which we have elected the fair value option.

Recovered_Sheet1

Loans and Allowance for Credit Losses, Loans by Delinquency Status, Commercial (Details) (USD $)	Mar. 31, 2015		Dec. 31, 2014		Dec. 31, 2008	Dec. 31, 2013
In Millions, unless otherwise specified
By delinquency status:
90+ DPD and still accruing	$16,344		$17,810
Nonaccrual loans	12,510		12,848
Purchased Credit Impaired Loans	22,389		23,320
Loans	861,231	[1]	862,551	[1]
Total Commercial [Member]
By delinquency status:
Nonaccrual loans	2,192		2,239
Purchased Credit Impaired Loans	1,078		1,507		18,704
Loans	415,299		414,826
Commercial and Industrial Loans [Member]
By delinquency status:
Nonaccrual loans	663		538
Purchased Credit Impaired Loans	69		75
Loans	271,088		271,795
Commercial Real Estate Mortgage [Member]
By delinquency status:
Nonaccrual loans	1,324		1,490
Purchased Credit Impaired Loans	886		1,261
Loans	111,848		111,996
Commercial Real Estate Construction [Member]
By delinquency status:
Nonaccrual loans	182		187
Purchased Credit Impaired Loans	123		171
Loans	19,981		18,728
Lease Financing [Member]
By delinquency status:
Nonaccrual loans	23		24
Purchased Credit Impaired Loans	0		0			0
Loans	12,382		12,307
Loans Excluding Purchased Credit-Impaired Loans [Member] | Total Commercial [Member]
By delinquency status:
Current-29 DPD and still accruing	411,192		410,252
30-89 DPD and still accruing	763		781
90+ DPD and still accruing	74		47
Nonaccrual loans	2,192		2,239
Loans, excluding Purchased Credit Impaired Loans	414,221		413,319
Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial and Industrial Loans [Member]
By delinquency status:
Current-29 DPD and still accruing	269,892		270,624
30-89 DPD and still accruing	433		527
90+ DPD and still accruing	31		31
Nonaccrual loans	663		538
Loans, excluding Purchased Credit Impaired Loans	271,019		271,720
Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial Real Estate Mortgage [Member]
By delinquency status:
Current-29 DPD and still accruing	109,300		109,032
30-89 DPD and still accruing	295		197
90+ DPD and still accruing	43		16
Nonaccrual loans	1,324		1,490
Loans, excluding Purchased Credit Impaired Loans	110,962		110,735
Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial Real Estate Construction [Member]
By delinquency status:
Current-29 DPD and still accruing	19,666		18,345
30-89 DPD and still accruing	10		25
90+ DPD and still accruing	0		0
Nonaccrual loans	182		187
Loans, excluding Purchased Credit Impaired Loans	19,858		18,557
Loans Excluding Purchased Credit-Impaired Loans [Member] | Lease Financing [Member]
By delinquency status:
Current-29 DPD and still accruing	12,334		12,251
30-89 DPD and still accruing	25		32
90+ DPD and still accruing	0		0
Nonaccrual loans	23		24
Loans, excluding Purchased Credit Impaired Loans	$12,382		$12,307
[1]	Parenthetical amounts represent assets and liabilities for which we have elected the fair value option.

Recovered_Sheet2

Loans and Allowance for Credit Losses, Loans by Delinquency Status, Consumer (Details) (USD $)	Mar. 31, 2015		Dec. 31, 2014		Dec. 31, 2008
In Millions, unless otherwise specified
By delinquency status:
Purchased Credit Impaired Loans	$22,389		$23,320
Loans	861,231	[1]	862,551	[1]
Total Consumer [Member]
By delinquency status:
Purchased Credit Impaired Loans	21,311		21,813		40,100
Loans	445,932		447,725
Real estate 1-4 family first mortgage [Member]
By delinquency status:
Purchased Credit Impaired Loans	21,223		21,712
Loans	265,213		265,386
Real estate 1-4 family junior lien mortgage [Member]
By delinquency status:
Purchased Credit Impaired Loans	88		101
Loans	57,839		59,717
Credit Card [Member]
By delinquency status:
Purchased Credit Impaired Loans	0		0
Loans	30,078		31,119
Automobile [Member]
By delinquency status:
Purchased Credit Impaired Loans	0		0
Loans	56,339		55,740
Other revolving credit and installment [Member]
By delinquency status:
Purchased Credit Impaired Loans	0		0
Loans	36,463		35,763
Loans Excluding Purchased Credit-Impaired Loans [Member] | Total Consumer [Member]
By delinquency status:
Current-29 DPD	387,791		386,901
30-59 DPD	3,551		4,288
60-89 DPD	1,432		1,719
90-119 DPD	789		942
120-179 DPD	931		1,057
180 or more DPD	4,609		4,737
Government insured/guaranteed loans	25,518		26,268
Loans, excluding Purchased Credit Impaired Loans	424,621		425,912
Loans Excluding Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family first mortgage [Member]
By delinquency status:
Current-29 DPD	210,505		208,642
30-59 DPD	2,065		2,415
60-89 DPD	852		993
90-119 DPD	417		488
120-179 DPD	511		610
180 or more DPD	4,122		4,258
Government insured/guaranteed loans	25,518		26,268
Loans, excluding Purchased Credit Impaired Loans	243,990		243,674
Loans Excluding Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family junior lien mortgage [Member]
By delinquency status:
Current-29 DPD	56,460		58,182
30-59 DPD	337		398
60-89 DPD	198		220
90-119 DPD	116		158
120-179 DPD	170		194
180 or more DPD	470		464
Government insured/guaranteed loans	0		0
Loans, excluding Purchased Credit Impaired Loans	57,751		59,616
Loans Excluding Purchased Credit-Impaired Loans [Member] | Credit Card [Member]
By delinquency status:
Current-29 DPD	29,401		30,356
30-59 DPD	188		239
60-89 DPD	137		160
90-119 DPD	124		136
120-179 DPD	227		227
180 or more DPD	1		1
Government insured/guaranteed loans	0		0
Loans, excluding Purchased Credit Impaired Loans	30,078		31,119
Loans Excluding Purchased Credit-Impaired Loans [Member] | Automobile [Member]
By delinquency status:
Current-29 DPD	55,340		54,365
30-59 DPD	792		1,056
60-89 DPD	150		235
90-119 DPD	51		78
120-179 DPD	5		5
180 or more DPD	1		1
Government insured/guaranteed loans	0		0
Loans, excluding Purchased Credit Impaired Loans	56,339		55,740
Loans Excluding Purchased Credit-Impaired Loans [Member] | Other revolving credit and installment [Member]
By delinquency status:
Current-29 DPD	36,085		35,356
30-59 DPD	169		180
60-89 DPD	95		111
90-119 DPD	81		82
120-179 DPD	18		21
180 or more DPD	15		13
Government insured/guaranteed loans	0		0
Loans, excluding Purchased Credit Impaired Loans	$36,463		$35,763
[1]	Parenthetical amounts represent assets and liabilities for which we have elected the fair value option.

Recovered_Sheet3

Loans and Allowance for Credit Losses, Loans by FICO Score, Consumer (Details) (USD $)	Mar. 31, 2015		Dec. 31, 2014		Dec. 31, 2008
In Millions, unless otherwise specified
By updated FICO:
Purchased Credit Impaired Loans (carrying value)	$22,389		$23,320
Loans	861,231	[1]	862,551	[1]
Total Consumer [Member]
By updated FICO:
Purchased Credit Impaired Loans (carrying value)	21,311		21,813		40,100
Loans	445,932		447,725
Real estate 1-4 family first mortgage [Member]
By updated FICO:
Purchased Credit Impaired Loans (carrying value)	21,223		21,712
Loans	265,213		265,386
Real estate 1-4 family junior lien mortgage [Member]
By updated FICO:
Purchased Credit Impaired Loans (carrying value)	88		101
Loans	57,839		59,717
Credit Card [Member]
By updated FICO:
Purchased Credit Impaired Loans (carrying value)	0		0
Loans	30,078		31,119
Automobile [Member]
By updated FICO:
Purchased Credit Impaired Loans (carrying value)	0		0
Loans	56,339		55,740
Other revolving credit and installment [Member]
By updated FICO:
Purchased Credit Impaired Loans (carrying value)	0		0
Loans	36,463		35,763
Loans Excluding Purchased Credit-Impaired Loans [Member] | Total Consumer [Member]
By updated FICO:
Less than 600	27,123		27,525
600-639	20,408		20,542
640-679	35,543		35,867
680-719	53,848		54,050
720-759	66,821		67,439
760-799	119,574		120,242
800 and greater	63,153		61,561
No FICO available	6,566		6,564
FICO not required	6,067		5,854
Government insured/guaranteed loans	25,518		26,268
Loans, excluding Purchased Credit Impaired Loans	424,621		425,912
Loans Excluding Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family first mortgage [Member]
By updated FICO:
Less than 600	10,734		11,166
600-639	7,790		7,866
640-679	13,725		13,894
680-719	24,563		24,412
720-759	35,288		35,490
760-799	82,421		82,123
800 and greater	41,069		39,219
No FICO available	2,882		3,236
FICO not required	0		0
Government insured/guaranteed loans	25,518		26,268
Loans, excluding Purchased Credit Impaired Loans	243,990		243,674
Loans Excluding Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family junior lien mortgage [Member]
By updated FICO:
Less than 600	3,902		4,001
600-639	2,732		2,794
640-679	5,169		5,324
680-719	8,673		8,970
720-759	11,884		12,171
760-799	17,151		17,897
800 and greater	7,352		7,581
No FICO available	888		878
FICO not required	0		0
Government insured/guaranteed loans	0		0
Loans, excluding Purchased Credit Impaired Loans	57,751		59,616
Loans Excluding Purchased Credit-Impaired Loans [Member] | Credit Card [Member]
By updated FICO:
Less than 600	2,744		2,639
600-639	2,582		2,588
640-679	4,800		4,931
680-719	6,087		6,285
720-759	6,203		6,407
760-799	4,938		5,234
800 and greater	2,498		2,758
No FICO available	226		277
FICO not required	0		0
Government insured/guaranteed loans	0		0
Loans, excluding Purchased Credit Impaired Loans	30,078		31,119
Loans Excluding Purchased Credit-Impaired Loans [Member] | Automobile [Member]
By updated FICO:
Less than 600	8,814		8,825
600-639	6,256		6,236
640-679	9,477		9,352
680-719	10,181		9,994
720-759	7,606		7,475
760-799	7,254		7,315
800 and greater	6,226		6,184
No FICO available	525		359
FICO not required	0		0
Government insured/guaranteed loans	0		0
Loans, excluding Purchased Credit Impaired Loans	56,339		55,740
Loans Excluding Purchased Credit-Impaired Loans [Member] | Other revolving credit and installment [Member]
By updated FICO:
Less than 600	929		894
600-639	1,048		1,058
640-679	2,372		2,366
680-719	4,344		4,389
720-759	5,840		5,896
760-799	7,810		7,673
800 and greater	6,008		5,819
No FICO available	2,045		1,814
FICO not required	6,067		5,854
Government insured/guaranteed loans	0		0
Loans, excluding Purchased Credit Impaired Loans	$36,463		$35,763
[1]	Parenthetical amounts represent assets and liabilities for which we have elected the fair value option.

Recovered_Sheet4

Loans and Allowance for Credit Losses, Loans by Loan to Value Ratio, Consumer (Details) (USD $)	Mar. 31, 2015		Dec. 31, 2014
In Millions, unless otherwise specified
By LTV/CLTV:
Purchased Credit Impaired Loans (carrying value)	$22,389		$23,320
Loans	861,231	[1]	862,551	[1]
Nonaccrual loans	12,510		12,848
Residential Mortgage [Member]
By LTV/CLTV:
Purchased Credit Impaired Loans (carrying value)	21,311		21,813
Loans	323,052		325,103
Residential Mortgage [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member]
By LTV/CLTV:
0-60%	110,705		111,322
60.01-80%	104,574		103,763
80.01-100%	39,377		39,174
100.01-120%	12,931		13,387
Greater than 120%	6,466		6,914
No LTV/CLTV available	2,170		2,462
Government insured/guaranteed loans	25,518		26,268
Loans, excluding Purchased Credit Impaired Loans	301,741		303,290
Real estate 1-4 family first mortgage [Member]
By LTV/CLTV:
Purchased Credit Impaired Loans (carrying value)	21,223		21,712
Loans	265,213		265,386
Nonaccrual loans	8,345		8,583
Real estate 1-4 family first mortgage [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member]
By LTV/CLTV:
0-60%	95,988		95,719
60.01-80%	87,147		86,112
80.01-100%	25,544		25,170
100.01-120%	5,908		6,133
Greater than 120%	2,682		2,856
No LTV/CLTV available	1,203		1,416
Government insured/guaranteed loans	25,518		26,268
Loans, excluding Purchased Credit Impaired Loans	243,990		243,674
Real estate 1-4 family junior lien mortgage [Member]
By LTV/CLTV:
Purchased Credit Impaired Loans (carrying value)	88		101
Loans	57,839		59,717
Nonaccrual loans	1,798		1,848
Real estate 1-4 family junior lien mortgage [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member]
By LTV/CLTV:
0-60%	14,717		15,603
60.01-80%	17,427		17,651
80.01-100%	13,833		14,004
100.01-120%	7,023		7,254
Greater than 120%	3,784		4,058
No LTV/CLTV available	967		1,046
Government insured/guaranteed loans	0		0
Loans, excluding Purchased Credit Impaired Loans	$57,751		$59,616
[1]	Parenthetical amounts represent assets and liabilities for which we have elected the fair value option.

Recovered_Sheet5

Loans and Allowance for Credit Losses, Nonaccrual (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Millions, unless otherwise specified
Nonaccrual Loans [Abstract]
Nonaccrual loans	$12,510	$12,848
Total Commercial [Member]
Nonaccrual Loans [Abstract]
Nonaccrual loans	2,192	2,239
Commercial and Industrial Loans [Member]
Nonaccrual Loans [Abstract]
Nonaccrual loans	663	538
Commercial Real Estate Mortgage [Member]
Nonaccrual Loans [Abstract]
Nonaccrual loans	1,324	1,490
Commercial Real Estate Construction [Member]
Nonaccrual Loans [Abstract]
Nonaccrual loans	182	187
Lease Financing [Member]
Nonaccrual Loans [Abstract]
Nonaccrual loans	23	24
Total Consumer [Member]
Nonaccrual Loans [Abstract]
Nonaccrual loans	10,318	10,609
Real estate 1-4 family first mortgage [Member]
Nonaccrual Loans [Abstract]
Nonaccrual loans	8,345	8,583
Real estate 1-4 family junior lien mortgage [Member]
Nonaccrual Loans [Abstract]
Nonaccrual loans	1,798	1,848
Automobile [Member]
Nonaccrual Loans [Abstract]
Nonaccrual loans	133	137
Other revolving credit and installment [Member]
Nonaccrual Loans [Abstract]
Nonaccrual loans	$42	$41

Recovered_Sheet6

Loans and Allowance for Credit Losses, 90 Days or More Past Due and Still Accruing (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Millions, unless otherwise specified
Loans 90 days or more past due and still accruing:
90 days or more past due and still accruing	$16,344	$17,810
FHA Insured/VA Guaranteed [Member]
Loans 90 days or more past due and still accruing:
90 days or more past due and still accruing	15,453	16,827
Student Loans guaranteed under FFELP [Member]
Loans 90 days or more past due and still accruing:
90 days or more past due and still accruing	50	63
Total Consumer [Member]
Loans 90 days or more past due and still accruing:
90 days or more past due and still accruing	767	873
Total, not government insured/guaranteed [Member]
Loans 90 days or more past due and still accruing:
90 days or more past due and still accruing	841	920
Total, not government insured/guaranteed [Member] | Total Commercial [Member]
Loans 90 days or more past due and still accruing:
90 days or more past due and still accruing	74	47
Total, not government insured/guaranteed [Member] | Commercial and Industrial Loans [Member]
Loans 90 days or more past due and still accruing:
90 days or more past due and still accruing	31	31
Total, not government insured/guaranteed [Member] | Commercial Real Estate Mortgage [Member]
Loans 90 days or more past due and still accruing:
90 days or more past due and still accruing	43	16
Total, not government insured/guaranteed [Member] | Commercial Real Estate Construction [Member]
Loans 90 days or more past due and still accruing:
90 days or more past due and still accruing	0	0
Total, not government insured/guaranteed [Member] | Total Consumer [Member]
Loans 90 days or more past due and still accruing:
90 days or more past due and still accruing	767	873
Total, not government insured/guaranteed [Member] | Real estate 1-4 family first mortgage [Member]
Loans 90 days or more past due and still accruing:
90 days or more past due and still accruing	221	260
Total, not government insured/guaranteed [Member] | Real estate 1-4 family junior lien mortgage [Member]
Loans 90 days or more past due and still accruing:
90 days or more past due and still accruing	55	83
Total, not government insured/guaranteed [Member] | Credit Card [Member]
Loans 90 days or more past due and still accruing:
90 days or more past due and still accruing	352	364
Total, not government insured/guaranteed [Member] | Automobile [Member]
Loans 90 days or more past due and still accruing:
90 days or more past due and still accruing	47	73
Total, not government insured/guaranteed [Member] | Other revolving credit and installment [Member]
Loans 90 days or more past due and still accruing:
90 days or more past due and still accruing	$92	$93

Recovered_Sheet7

Loans and Allowance for Credit Losses, Impaired Loans (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Millions, unless otherwise specified
Impaired Loans [Abstract]
Unpaid principal balance	$29,619	$30,244
Impaired loans	25,082	25,408
Impaired loans with related allowance for credit losses	17,959	18,366
Related allowance for credit losses	3,749	3,970
Total Commercial [Member]
Impaired Loans [Abstract]
Unpaid principal balance	5,201	5,238
Impaired loans	3,702	3,759
Impaired loans with related allowance for credit losses	3,440	3,489
Related allowance for credit losses	774	884
Commercial and Industrial Loans [Member]
Impaired Loans [Abstract]
Unpaid principal balance	1,727	1,524
Impaired loans	1,071	926
Impaired loans with related allowance for credit losses	899	757
Related allowance for credit losses	234	240
Commercial Real Estate Mortgage [Member]
Impaired Loans [Abstract]
Unpaid principal balance	3,008	3,190
Impaired loans	2,349	2,483
Impaired loans with related allowance for credit losses	2,279	2,405
Related allowance for credit losses	486	591
Commercial Real Estate Construction [Member]
Impaired Loans [Abstract]
Unpaid principal balance	433	491
Impaired loans	258	331
Impaired loans with related allowance for credit losses	238	308
Related allowance for credit losses	47	45
Lease Financing [Member]
Impaired Loans [Abstract]
Unpaid principal balance	33	33
Impaired loans	24	19
Impaired loans with related allowance for credit losses	24	19
Related allowance for credit losses	7	8
Total Consumer [Member]
Impaired Loans [Abstract]
Unpaid principal balance	24,418	25,006
Impaired loans	21,380	21,649
Impaired loans with related allowance for credit losses	14,519	14,877
Related allowance for credit losses	2,975	3,086
Real estate 1-4 family first mortgage [Member]
Impaired Loans [Abstract]
Unpaid principal balance	21,007	21,324
Impaired loans	18,347	18,600
Impaired loans with related allowance for credit losses	12,119	12,433
Related allowance for credit losses	2,218	2,322
Real estate 1-4 family junior lien mortgage [Member]
Impaired Loans [Abstract]
Unpaid principal balance	2,835	3,094
Impaired loans	2,529	2,534
Impaired loans with related allowance for credit losses	1,980	2,009
Related allowance for credit losses	648	653
Credit Card [Member]
Impaired Loans [Abstract]
Unpaid principal balance	326	338
Impaired loans	326	338
Impaired loans with related allowance for credit losses	326	338
Related allowance for credit losses	95	98
Automobile [Member]
Impaired Loans [Abstract]
Unpaid principal balance	188	190
Impaired loans	123	127
Impaired loans with related allowance for credit losses	48	55
Related allowance for credit losses	7	8
Other revolving credit and installment [Member]
Impaired Loans [Abstract]
Unpaid principal balance	62	60
Impaired loans	55	50
Impaired loans with related allowance for credit losses	46	42
Related allowance for credit losses	7	5
Impaired Loans [Member] | Consumer Real Estate Loans Government Guaranteed Or Insured [Member]
Financing Receivable, Impaired [Line Items]
Government insured/guaranteed loans	$2,100	$2,100

Recovered_Sheet8

Loans and Allowance for Credit Losses, Impaired Loans, Average Recorded Investment and Interest Income (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average recorded investment	$25,244	$27,792
Recognized interest income	348	349
Interest income:
Cash basis of accounting	108	99
Other	240	250
Total Commercial [Member]
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average recorded investment	3,733	5,127
Recognized interest income	67	57
Commercial and Industrial Loans [Member]
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average recorded investment	1,000	1,282
Recognized interest income	20	21
Commercial Real Estate Mortgage [Member]
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average recorded investment	2,421	3,237
Recognized interest income	43	29
Commercial Real Estate Construction [Member]
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average recorded investment	291	575
Recognized interest income	4	7
Lease Financing [Member]
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average recorded investment	21	33
Recognized interest income	0	0
Total Consumer [Member]
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average recorded investment	21,511	22,665
Recognized interest income	281	292
Real estate 1-4 family first mortgage [Member]
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average recorded investment	18,486	19,479
Recognized interest income	231	237
Real estate 1-4 family junior lien mortgage [Member]
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average recorded investment	2,522	2,557
Recognized interest income	35	35
Credit Card [Member]
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average recorded investment	332	415
Recognized interest income	10	12
Automobile [Member]
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average recorded investment	126	179
Recognized interest income	4	7
Other revolving credit and installment [Member]
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average recorded investment	45	35
Recognized interest income	$1	$1

Recovered_Sheet9

Loans and Allowance for Credit Losses, Troubled Debt Restructurings Modifications by Type (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Primary modification type
Principal	$123	$195
Interest rate reduction	186	233
Other concessions	1,171	1,517
Total	1,480	1,945
Financial effects of modifications
Charge-offs	40	71
Weighted average interest rate reduction	3.90%	3.37%
Recorded investment related to interest rate reduction	274	387
Total Commercial [Member]
Primary modification type
Principal	11	3
Interest rate reduction	32	53
Other concessions	577	702
Total	620	758
Financial effects of modifications
Charge-offs	3	11
Weighted average interest rate reduction	1.14%	1.71%
Recorded investment related to interest rate reduction	32	53
Commercial and Industrial Loans [Member]
Primary modification type
Principal	0	0
Interest rate reduction	10	13
Other concessions	224	265
Total	234	278
Financial effects of modifications
Charge-offs	2	11
Weighted average interest rate reduction	0.76%	3.06%
Recorded investment related to interest rate reduction	10	13
Commercial Real Estate Mortgage [Member]
Primary modification type
Principal	0	3
Interest rate reduction	21	39
Other concessions	309	294
Total	330	336
Financial effects of modifications
Charge-offs	1	0
Weighted average interest rate reduction	1.35%	1.29%
Recorded investment related to interest rate reduction	21	39
Commercial Real Estate Construction [Member]
Primary modification type
Principal	11	0
Interest rate reduction	1	1
Other concessions	44	143
Total	56	144
Financial effects of modifications
Charge-offs	0	0
Weighted average interest rate reduction	0.17%	1.49%
Recorded investment related to interest rate reduction	1	1
Total Consumer [Member]
Primary modification type
Principal	112	192
Interest rate reduction	154	180
Other concessions	594	815
Total	860	1,187
Financial effects of modifications
Charge-offs	37	60
Weighted average interest rate reduction	4.27%	3.63%
Recorded investment related to interest rate reduction	242	334
Real estate 1-4 family first mortgage [Member]
Primary modification type
Principal	104	173
Interest rate reduction	83	108
Other concessions	516	757
Total	703	1,038
Financial effects of modifications
Charge-offs	15	32
Weighted average interest rate reduction	2.46%	2.73%
Recorded investment related to interest rate reduction	165	246
Real estate 1-4 family junior lien mortgage [Member]
Primary modification type
Principal	7	18
Interest rate reduction	20	34
Other concessions	51	63
Total	78	115
Financial effects of modifications
Charge-offs	12	18
Weighted average interest rate reduction	3.18%	3.24%
Recorded investment related to interest rate reduction	27	50
Credit Card [Member]
Primary modification type
Principal	0	0
Interest rate reduction	45	36
Other concessions	0	0
Total	45	36
Financial effects of modifications
Charge-offs	0	0
Weighted average interest rate reduction	11.29%	10.12%
Recorded investment related to interest rate reduction	44	36
Automobile [Member]
Primary modification type
Principal	1	1
Interest rate reduction	1	1
Other concessions	27	23
Total	29	25
Financial effects of modifications
Charge-offs	10	10
Weighted average interest rate reduction	9.06%	9.58%
Recorded investment related to interest rate reduction	1	1
Other revolving credit and installment [Member]
Primary modification type
Principal	0	0
Interest rate reduction	5	1
Other concessions	2	1
Total	7	2
Financial effects of modifications
Charge-offs	0	0
Weighted average interest rate reduction	5.82%	4.90%
Recorded investment related to interest rate reduction	5	1
Trial modifications [Member]
Primary modification type
Principal	0	0
Interest rate reduction	0	0
Other concessions	-2	-29
Total	-2	-29
Financial effects of modifications
Charge-offs	0	0
Weighted average interest rate reduction	0.00%	0.00%
Recorded investment related to interest rate reduction	$0	$0

Recovered_Sheet10

Loans and Allowance for Credit Losses, Troubled Debt Restructurings, Current Defaults (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Financing Receivable, Modifications [Line Items]
Recorded investment of defaults	$105	$162
Total Commercial [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment of defaults	32	59
Commercial and Industrial Loans [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment of defaults	8	14
Commercial Real Estate Mortgage [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment of defaults	23	42
Commercial Real Estate Construction [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment of defaults	1	3
Total Consumer [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment of defaults	73	103
Real estate 1-4 family first mortgage [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment of defaults	52	79
Real estate 1-4 family junior lien mortgage [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment of defaults	4	7
Credit Card [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment of defaults	13	13
Automobile [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment of defaults	3	4
Other revolving credit and installment [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment of defaults	$1	$0

Recovered_Sheet11

Loans and Allowance for Credit Losses, PCI Loans Outstanding (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Dec. 31, 2008
In Millions, unless otherwise specified
PCI loans [Abstract]
Purchased Credit Impaired Loans (carrying value)	$22,389	$23,320
Total PCI loans (unpaid principal balance)	31,596	32,924	98,182
Total Commercial [Member]
PCI loans [Abstract]
Purchased Credit Impaired Loans (carrying value)	1,078	1,507	18,704
Commercial and Industrial Loans [Member]
PCI loans [Abstract]
Purchased Credit Impaired Loans (carrying value)	69	75
Commercial Real Estate Mortgage [Member]
PCI loans [Abstract]
Purchased Credit Impaired Loans (carrying value)	886	1,261
Commercial Real Estate Construction [Member]
PCI loans [Abstract]
Purchased Credit Impaired Loans (carrying value)	123	171
Total Consumer [Member]
PCI loans [Abstract]
Purchased Credit Impaired Loans (carrying value)	21,311	21,813	40,100
Real estate 1-4 family first mortgage [Member]
PCI loans [Abstract]
Purchased Credit Impaired Loans (carrying value)	21,223	21,712
Real estate 1-4 family junior lien mortgage [Member]
PCI loans [Abstract]
Purchased Credit Impaired Loans (carrying value)	$88	$101

Recovered_Sheet12

Loans and Allowance for Credit Losses, PCI, Accretable Yield (Details) (USD $)	3 Months Ended	72 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Change in accretable yield related to PCI loans [Abstract]
Total, beginning of period	$17,790	$10,447
Addition of accretable yield due to acquisitions	0	132
Accretion into interest income	-398	-12,783
Accretion into noninterest income due to sales	-28	-430
Reclassification from nonaccretable difference for loans with improving credit-related cash flows	22	8,568
Changes in expected cash flows that do not affect nonaccretable difference	-61	11,856
Total, end of period	$17,325	$17,790

Recovered_Sheet13

Loans and Allowance for Credit Losses, PCI, Allowance for Credit Losses (Details) (USD $)	3 Months Ended	72 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Changes in allowance for PCI loan losses [Abstract]
Balance, beginning of period	$11	$0
Provision for loan losses	5	1,733
Charge-offs	-7	-1,722
Balance, end of period	9	11
Commercial Portfolio Segment [Member]
Changes in allowance for PCI loan losses [Abstract]
Balance, beginning of period	11	0
Provision for loan losses	5	1,629
Charge-offs	-7	-1,618
Balance, end of period	9	11
Pick-a-pay [Member]
Changes in allowance for PCI loan losses [Abstract]
Balance, beginning of period	0	0
Provision for loan losses	0	0
Charge-offs	0	0
Balance, end of period	0	0
Other Consumer [Member]
Changes in allowance for PCI loan losses [Abstract]
Balance, beginning of period	0	0
Provision for loan losses	0	104
Charge-offs	0	-104
Balance, end of period	$0	$0

Recovered_Sheet14

Loans and Allowance for Credit Losses, PCI, by Credit Quality Indicator (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Dec. 31, 2008
In Millions, unless otherwise specified
Purchased Credit Impaired Loans by Credit Quality Indicator [Abstract]
Purchased Credit Impaired Loans	$22,389	$23,320
Total Commercial [Member]
Purchased Credit Impaired Loans by Credit Quality Indicator [Abstract]
Purchased Credit Impaired Loans	1,078	1,507	18,704
Commercial and Industrial Loans [Member]
Purchased Credit Impaired Loans by Credit Quality Indicator [Abstract]
Purchased Credit Impaired Loans	69	75
Commercial Real Estate Mortgage [Member]
Purchased Credit Impaired Loans by Credit Quality Indicator [Abstract]
Purchased Credit Impaired Loans	886	1,261
Commercial Real Estate Construction [Member]
Purchased Credit Impaired Loans by Credit Quality Indicator [Abstract]
Purchased Credit Impaired Loans	123	171
Purchased Credit-Impaired Loans [Member] | Total Commercial [Member]
Purchased Credit Impaired Loans by Credit Quality Indicator [Abstract]
Purchased Credit Impaired Loans	1,078	1,507
Purchased Credit-Impaired Loans [Member] | Commercial and Industrial Loans [Member]
Purchased Credit Impaired Loans by Credit Quality Indicator [Abstract]
Purchased Credit Impaired Loans	69	75
Purchased Credit-Impaired Loans [Member] | Commercial Real Estate Mortgage [Member]
Purchased Credit Impaired Loans by Credit Quality Indicator [Abstract]
Purchased Credit Impaired Loans	886	1,261
Purchased Credit-Impaired Loans [Member] | Commercial Real Estate Construction [Member]
Purchased Credit Impaired Loans by Credit Quality Indicator [Abstract]
Purchased Credit Impaired Loans	123	171
Pass [Member] | Purchased Credit-Impaired Loans [Member] | Total Commercial [Member]
Purchased Credit Impaired Loans by Credit Quality Indicator [Abstract]
Purchased Credit Impaired Loans	504	922
Pass [Member] | Purchased Credit-Impaired Loans [Member] | Commercial and Industrial Loans [Member]
Purchased Credit Impaired Loans by Credit Quality Indicator [Abstract]
Purchased Credit Impaired Loans	13	21
Pass [Member] | Purchased Credit-Impaired Loans [Member] | Commercial Real Estate Mortgage [Member]
Purchased Credit Impaired Loans by Credit Quality Indicator [Abstract]
Purchased Credit Impaired Loans	407	783
Pass [Member] | Purchased Credit-Impaired Loans [Member] | Commercial Real Estate Construction [Member]
Purchased Credit Impaired Loans by Credit Quality Indicator [Abstract]
Purchased Credit Impaired Loans	84	118
Criticized [Member] | Purchased Credit-Impaired Loans [Member] | Total Commercial [Member]
Purchased Credit Impaired Loans by Credit Quality Indicator [Abstract]
Purchased Credit Impaired Loans	574	585
Criticized [Member] | Purchased Credit-Impaired Loans [Member] | Commercial and Industrial Loans [Member]
Purchased Credit Impaired Loans by Credit Quality Indicator [Abstract]
Purchased Credit Impaired Loans	56	54
Criticized [Member] | Purchased Credit-Impaired Loans [Member] | Commercial Real Estate Mortgage [Member]
Purchased Credit Impaired Loans by Credit Quality Indicator [Abstract]
Purchased Credit Impaired Loans	479	478
Criticized [Member] | Purchased Credit-Impaired Loans [Member] | Commercial Real Estate Construction [Member]
Purchased Credit Impaired Loans by Credit Quality Indicator [Abstract]
Purchased Credit Impaired Loans	$39	$53

Recovered_Sheet15

Loans and Allowance for Credit Losses, PCI, by Delinquency Status, Commercial (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Dec. 31, 2008
In Millions, unless otherwise specified
By delinquency status:
90+ DPD and still accruing	$16,344	$17,810
Purchased Credit Impaired Loans	22,389	23,320
Purchased Credit-Impaired Loans [Member]
By delinquency status:
90+ DPD and still accruing	3,600	3,700
Total Commercial [Member]
By delinquency status:
Purchased Credit Impaired Loans	1,078	1,507	18,704
Total Commercial [Member] | Purchased Credit-Impaired Loans [Member]
By delinquency status:
Current-29 DPD and still accruing	994	1,371
30-89 DPD and still accruing	9	53
90+ DPD and still accruing	75	83
Purchased Credit Impaired Loans	1,078	1,507
Commercial and Industrial Loans [Member]
By delinquency status:
Purchased Credit Impaired Loans	69	75
Commercial and Industrial Loans [Member] | Purchased Credit-Impaired Loans [Member]
By delinquency status:
Current-29 DPD and still accruing	69	75
30-89 DPD and still accruing	0	0
90+ DPD and still accruing	0	0
Purchased Credit Impaired Loans	69	75
Commercial Real Estate Mortgage [Member]
By delinquency status:
Purchased Credit Impaired Loans	886	1,261
Commercial Real Estate Mortgage [Member] | Purchased Credit-Impaired Loans [Member]
By delinquency status:
Current-29 DPD and still accruing	811	1,135
30-89 DPD and still accruing	9	48
90+ DPD and still accruing	66	78
Purchased Credit Impaired Loans	886	1,261
Commercial Real Estate Construction [Member]
By delinquency status:
Purchased Credit Impaired Loans	123	171
Commercial Real Estate Construction [Member] | Purchased Credit-Impaired Loans [Member]
By delinquency status:
Current-29 DPD and still accruing	114	161
30-89 DPD and still accruing	0	5
90+ DPD and still accruing	9	5
Purchased Credit Impaired Loans	$123	$171

Recovered_Sheet16

Loans and Allowance for Credit Losses, PCI, by Delinquency Status, Consumer (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Millions, unless otherwise specified
By delinquency status:
Purchased Credit Impaired Loans (carrying value)	$22,389	$23,320
Residential Mortgage [Member]
By delinquency status:
Purchased Credit Impaired Loans (carrying value)	21,311	21,813
Residential Mortgage [Member] | Purchased Credit-Impaired Loans [Member]
By delinquency status:
Current-29 DPD and still accruing	19,413	19,404
30-59 DPD and still accruing	1,789	1,994
60-89 DPD and still accruing	866	1,054
90-119 DPD and still accruing	367	404
120-179 DPD and still accruing	380	443
180 or more DPD and still accruing	3,614	3,737
Total consumer PCI loans (adjusted unpaid principal balance)	26,429	27,036
Purchased Credit Impaired Loans (carrying value)	21,311	21,813
Real estate 1-4 family first mortgage [Member]
By delinquency status:
Purchased Credit Impaired Loans (carrying value)	21,223	21,712
Real estate 1-4 family first mortgage [Member] | Purchased Credit-Impaired Loans [Member]
By delinquency status:
Current-29 DPD and still accruing	19,187	19,236
30-59 DPD and still accruing	1,782	1,987
60-89 DPD and still accruing	863	1,051
90-119 DPD and still accruing	364	402
120-179 DPD and still accruing	378	440
180 or more DPD and still accruing	3,596	3,654
Total consumer PCI loans (adjusted unpaid principal balance)	26,170	26,770
Purchased Credit Impaired Loans (carrying value)	21,223	21,712
Real estate 1-4 family junior lien mortgage [Member]
By delinquency status:
Purchased Credit Impaired Loans (carrying value)	88	101
Real estate 1-4 family junior lien mortgage [Member] | Purchased Credit-Impaired Loans [Member]
By delinquency status:
Current-29 DPD and still accruing	226	168
30-59 DPD and still accruing	7	7
60-89 DPD and still accruing	3	3
90-119 DPD and still accruing	3	2
120-179 DPD and still accruing	2	3
180 or more DPD and still accruing	18	83
Total consumer PCI loans (adjusted unpaid principal balance)	259	266
Purchased Credit Impaired Loans (carrying value)	$88	$101

Recovered_Sheet17

Loans and Allowance for Credit Losses, PCI, by FICO Score, Consumer (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Millions, unless otherwise specified
By FICO:
Purchased Credit Impaired Loans (carrying value)	$22,389	$23,320
Residential Mortgage [Member]
By FICO:
Purchased Credit Impaired Loans (carrying value)	21,311	21,813
Residential Mortgage [Member] | Purchased Credit-Impaired Loans [Member]
By FICO:
Less than 600	7,472	7,783
600-639	5,312	5,469
640-679	6,612	6,787
680-719	4,125	4,047
720-759	1,725	1,741
760-799	859	881
800 and greater	221	221
No FICO available	103	107
Total consumer PCI loans (adjusted unpaid principal balance)	26,429	27,036
Purchased Credit Impaired Loans (carrying value)	21,311	21,813
Real estate 1-4 family first mortgage [Member]
By FICO:
Purchased Credit Impaired Loans (carrying value)	21,223	21,712
Real estate 1-4 family first mortgage [Member] | Purchased Credit-Impaired Loans [Member]
By FICO:
Less than 600	7,398	7,708
600-639	5,267	5,416
640-679	6,552	6,718
680-719	4,083	4,008
720-759	1,706	1,728
760-799	850	875
800 and greater	220	220
No FICO available	94	97
Total consumer PCI loans (adjusted unpaid principal balance)	26,170	26,770
Purchased Credit Impaired Loans (carrying value)	21,223	21,712
Real estate 1-4 family junior lien mortgage [Member]
By FICO:
Purchased Credit Impaired Loans (carrying value)	88	101
Real estate 1-4 family junior lien mortgage [Member] | Purchased Credit-Impaired Loans [Member]
By FICO:
Less than 600	74	75
600-639	45	53
640-679	60	69
680-719	42	39
720-759	19	13
760-799	9	6
800 and greater	1	1
No FICO available	9	10
Total consumer PCI loans (adjusted unpaid principal balance)	259	266
Purchased Credit Impaired Loans (carrying value)	$88	$101

Recovered_Sheet18

Loans and Allowance for Credit Losses, PCI, by Loan to Value Ratio, Consumer (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Millions, unless otherwise specified
By LTV/CLTV:
Purchased Credit Impaired Loans (carrying value)	$22,389	$23,320
Residential Mortgage [Member]
By LTV/CLTV:
Purchased Credit Impaired Loans (carrying value)	21,311	21,813
Real estate 1-4 family first mortgage [Member]
By LTV/CLTV:
Purchased Credit Impaired Loans (carrying value)	21,223	21,712
Real estate 1-4 family junior lien mortgage [Member]
By LTV/CLTV:
Purchased Credit Impaired Loans (carrying value)	88	101
Purchased Credit-Impaired Loans [Member] | Residential Mortgage [Member]
By LTV/CLTV:
0-60%	4,569	4,343
60.01-80%	11,276	11,335
80.01-100%	7,391	7,843
100.01-120%	2,285	2,481
Greater than 120%	900	1,024
No LTV/CLTV available	8	10
Total consumer PCI loans (adjusted unpaid principal balance)	26,429	27,036
Purchased Credit Impaired Loans (carrying value)	21,311	21,813
Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family first mortgage [Member]
By LTV/CLTV:
0-60%	4,541	4,309
60.01-80%	11,204	11,264
80.01-100%	7,302	7,751
100.01-120%	2,242	2,437
Greater than 120%	875	1,000
No LTV/CLTV available	6	9
Total consumer PCI loans (adjusted unpaid principal balance)	26,170	26,770
Purchased Credit Impaired Loans (carrying value)	21,223	21,712
Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family junior lien mortgage [Member]
By LTV/CLTV:
0-60%	28	34
60.01-80%	72	71
80.01-100%	89	92
100.01-120%	43	44
Greater than 120%	25	24
No LTV/CLTV available	2	1
Total consumer PCI loans (adjusted unpaid principal balance)	259	266
Purchased Credit Impaired Loans (carrying value)	$88	$101

Other_Assets_Details

Other Assets (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015		Mar. 31, 2014	Dec. 31, 2014
Components of Other Assets [Line Items]
Cost method investments	$6,912			$7,033
Equity method investments	12,585			12,410
Other assets, carried at fair value	2,549			2,512
Total nonmarketable equity investments	22,046			21,955
Corporate/bank-owned life insurance	19,050			18,982
Accounts receivable (3)	30,600			27,151
Interest receivable	5,095			4,871
Customer relationship and other amortized intangibles	5,357			5,660
Non-residential real estate	911			956
Operating lease assets	3,277			2,714
Due from customers on acceptances	222			201
Other	15,155			16,156
Other assets	101,879	[1]		99,057	[1]
Income (Expense) Related to Nonmarketable Equity Investments [Abstract]
Net realized gains from nonmarketable equity investments	351		551
All other	-148		-223
Total	203		328
Government insured/guaranteed [Member]
Components of Other Assets [Line Items]
Residential real estate	772			982
Non-government insured/guaranteed [Member]
Components of Other Assets [Line Items]
Residential real estate	646			671
Core deposit intangibles [Member]
Components of Other Assets [Line Items]
Customer relationship and other amortized intangibles	3,305			3,561
Customer relationship and other amortized intangibles [Member]
Components of Other Assets [Line Items]
Customer relationship and other amortized intangibles	800			857
Federal bank stock [Member]
Components of Other Assets [Line Items]
Cost method investments	4,725			4,733
Low Income Housing Tax Credit Equity Method Investments [Member]
Components of Other Assets [Line Items]
Equity method investments	7,464			7,278
Private equity and other [Member]
Components of Other Assets [Line Items]
Cost method investments	2,187			2,300
Equity method investments	$5,121			$5,132
[1]	Parenthetical amounts represent assets and liabilities for which we have elected the fair value option.

Other_Assets_Textuals_Details

Other Assets Textuals (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Dec. 31, 2014
Components of Other Assets [Line Items]
Equity Method Investments	$12,585,000,000	$12,410,000,000
Income (Loss) from Affordable Housing Projects, Equity Method Investments	178,000,000
Low income housing tax credit (LIHTC) investment total tax benefits	276,000,000
Low income housing tax credit (LIHTC) investment tax credits	209,000,000
Low income housing tax credit (LIHTC) investment liability for unfunded commitments	2,700,000,000
Low income housing tax credit (LIHTC) investment, year liability is expected to be paid	3 years
Low Income Housing Tax Credit Equity Method Investments [Member]
Components of Other Assets [Line Items]
Equity Method Investments	$7,464,000,000	$7,278,000,000

Securitizations_and_Variable_I2

Securitizations and Variable Interest Entities Textual (Details) (USD $)	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014	Dec. 31, 2014
Securitizations and Variable Interest Entities (Textual) [Abstract]
Amount Paid To Third Party Investors To Settle Repurchase Liabilities	$0		$78,000,000
Amount Paid To Repurchase Loans From Securitization Vehicles	3,300,000,000		4,100,000,000
Accrued expenses and other liabilities	90,121,000,000			86,122,000,000
Liabilities	1,547,773,000,000	[1]		1,501,893,000,000	[1]
Carrying value of delinquent loans eligible for repurchase	1,100,000,000			1,700,000,000
Principal amount that would be payable to securitization vehicles	1,100,000,000			1,700,000,000
Percentage of underlying collateral rated as investment grade	71.00%			70.00%
Net gains from sale of assets securitizations	111,000,000		29,000,000
200 basis point increase	101,000,000			130,000,000
Total loans	1,408,597,000,000			1,437,817,000,000
Delinquent loans	34,598,000,000			36,663,000,000
Loans [Member]
Securitizations and Variable Interest Entities (Textual) [Abstract]
Assets pledged to collateralize the borrowings of variable interest entity	613,000,000			637,000,000
Available-for-sale securities [Member]
Securitizations and Variable Interest Entities (Textual) [Abstract]
Assets pledged to collateralize the borrowings of variable interest entity	5,800,000,000			5,700,000,000
FNMA, FHLMC and GNMA [Member]
Securitizations and Variable Interest Entities (Textual) [Abstract]
Total loans	1,300,000,000,000			1,300,000,000,000
Delinquent loans	15,900,000,000			16,500,000,000
Commercial Portfolio Segment [Member]
Securitizations and Variable Interest Entities (Textual) [Abstract]
Foreclosed assets	5,200,000,000			3,300,000,000
Consumer Portfolio Segment [Member]
Securitizations and Variable Interest Entities (Textual) [Abstract]
Foreclosed assets	2,600,000,000			2,700,000,000
Residential Mortgage [Member]
Securitizations and Variable Interest Entities (Textual) [Abstract]
Amount of mortgages transferred in securitization and whole loan sale transactions	39,500,000,000		33,600,000,000
Residential Mortgage [Member] | Fair Value, Inputs, Level 2 [Member]
Securitizations and Variable Interest Entities (Textual) [Abstract]
Securities, at fair value	517,000,000
Residential Mortgage [Member] | Fair Value, Inputs, Level 3 [Member]
Securitizations and Variable Interest Entities (Textual) [Abstract]
Amount of servicing asset at fair value	308,000,000		289,000,000
Amount of liability for repurchase reserves at fair value	10,000,000		10,000,000
Commercial Mortgage [Member]
Securitizations and Variable Interest Entities (Textual) [Abstract]
Net gains from sale of assets securitizations	77,000,000		24,000,000
Amount of mortgages transferred in securitization and whole loan sale transactions	3,200,000,000		1,300,000,000
Commercial Mortgage [Member] | Fair Value, Inputs, Level 3 [Member]
Securitizations and Variable Interest Entities (Textual) [Abstract]
Amount of servicing asset at fair value	50,000,000		3,000,000
Other Investments [Member]
Securitizations and Variable Interest Entities (Textual) [Abstract]
Securities Available for Sale Portfolio of ARS issued by VIEs	541,000,000			567,000,000
Trust Preferred Securities [Member]
Securitizations and Variable Interest Entities (Textual) [Abstract]
Carrying value asset (liability)	-2,200,000,000			-2,100,000,000
Commercial Mortgage Servicing [Member]
Securitizations and Variable Interest Entities (Textual) [Abstract]
Fair value of interests held	1,500,000,000			1,600,000,000
Percentage of adverse change in interest rate	25.00%			25.00%
Decrease in fair value from 25% adverse change in interest rate	162,000,000			185,000,000
Long-term debt [Member]
Securitizations and Variable Interest Entities (Textual) [Abstract]
Private placement debt financing	6,000,000,000			6,000,000,000
Equity Interests [Member]
Securitizations and Variable Interest Entities (Textual) [Abstract]
Carrying value asset (liability)	8,200,000,000			8,100,000,000
Preferred stock [Member] | Trust Preferred Securities [Member]
Securitizations and Variable Interest Entities (Textual) [Abstract]
Carrying value - equity	2,500,000,000			2,500,000,000
VIEs That We Consolidate Recourse [Member]
Securitizations and Variable Interest Entities (Textual) [Abstract]
Liabilities	0			0
VIEs that we do not consolidate [Member]
Securitizations and Variable Interest Entities (Textual) [Abstract]
Accrued expenses and other liabilities	825,000,000			848,000,000
Liabilities	3,515,000,000			3,433,000,000
VIEs that we do not consolidate [Member] | Loans [Member]
Securitizations and Variable Interest Entities (Textual) [Abstract]
Loans Receivable	$6,100,000,000			$6,500,000,000
[1]	Our consolidated liabilities at March 31, 2015, and December 31, 2014, include the following VIE liabilities for which the VIE creditors do not have recourse to Wells Fargo: Accrued expenses and other liabilities, $48 million and $49 million; Long-term debt, $1.6 billion and $1.6 billion; and Total liabilities, $1.6 billion and $1.7 billion, respectively.

Securitizations_and_Variable_I3

Securitizations and Variable Interest Entities (Details) (USD $)	Mar. 31, 2015		Dec. 31, 2014		Mar. 31, 2014	Dec. 31, 2013
Variable Interest Entity Consolidated Carrying Amount Assets and Liabilities
Cash	$19,793,000,000		$19,571,000,000		$19,731,000,000	$19,919,000,000
Trading assets	79,278,000,000		78,255,000,000
Investment securities	326,384,000,000		313,801,000,000
Loans	861,231,000,000	[1]	862,551,000,000	[1]
Mortgage servicing rights	11,739,000,000		12,738,000,000
Other assets	101,879,000,000	[1]	99,057,000,000	[1]
Total assets	1,737,737,000,000	[2]	1,687,155,000,000	[2]
Short-term borrowings	77,697,000,000		63,518,000,000
Accrued expenses and other liabilities	90,121,000,000		86,122,000,000
Long-term debt	183,292,000,000		183,943,000,000
Total liabilities	1,547,773,000,000	[3]	1,501,893,000,000	[3]
Noncontrolling interests	1,168,000,000		868,000,000
VIEs that we do not consolidate [Member]
Variable Interest Entity Consolidated Carrying Amount Assets and Liabilities
Cash	0		0
Trading assets	1,741,000,000		2,165,000,000
Investment securities	16,624,000,000		18,271,000,000
Loans	12,415,000,000		13,195,000,000
Mortgage servicing rights	11,589,000,000		12,562,000,000
Other assets	7,607,000,000		7,456,000,000
Total assets	49,976,000,000		53,649,000,000
Short-term borrowings	0		0
Accrued expenses and other liabilities	825,000,000		848,000,000
Long-term debt	2,690,000,000		2,585,000,000
Total liabilities	3,515,000,000		3,433,000,000
Noncontrolling interests	0		0
Net assets	46,461,000,000		50,216,000,000
VIEs that we consolidate [Member]
Variable Interest Entity Consolidated Carrying Amount Assets and Liabilities
Cash	155,000,000		117,000,000
Trading assets	0		0
Investment securities	749,000,000		875,000,000
Loans	4,830,000,000		4,509,000,000
Mortgage servicing rights	0		0
Other assets	314,000,000		316,000,000
Total assets	6,048,000,000		5,817,000,000
Short-term borrowings	0		0
Accrued expenses and other liabilities	48,000,000		49,000,000
Long-term debt	1,562,000,000		1,628,000,000
Total liabilities	1,610,000,000		1,677,000,000
Noncontrolling interests	111,000,000		103,000,000
Net assets	4,327,000,000		4,037,000,000
Transfers that we account for as secured borrowings [Member]
Variable Interest Entity Consolidated Carrying Amount Assets and Liabilities
Cash	36,000,000		4,000,000
Trading assets	204,000,000		204,000,000
Investment securities	3,612,000,000		4,592,000,000
Loans	5,032,000,000		5,280,000,000
Mortgage servicing rights	0		0
Other assets	42,000,000		52,000,000
Total assets	8,926,000,000		10,132,000,000
Short-term borrowings	2,513,000,000		3,141,000,000
Accrued expenses and other liabilities	1,000,000		1,000,000
Long-term debt	4,764,000,000		4,990,000,000
Total liabilities	7,278,000,000		8,132,000,000
Noncontrolling interests	0		0
Net assets	1,648,000,000		2,000,000,000
Total VIE [Member]
Variable Interest Entity Consolidated Carrying Amount Assets and Liabilities
Cash	191,000,000		121,000,000
Trading assets	1,945,000,000		2,369,000,000
Investment securities	20,985,000,000		23,738,000,000
Loans	22,277,000,000		22,984,000,000
Mortgage servicing rights	11,589,000,000		12,562,000,000
Other assets	7,963,000,000		7,824,000,000
Total assets	64,950,000,000		69,598,000,000
Short-term borrowings	2,513,000,000		3,141,000,000
Accrued expenses and other liabilities	874,000,000		898,000,000
Long-term debt	9,016,000,000		9,203,000,000
Total liabilities	12,403,000,000		13,242,000,000
Noncontrolling interests	111,000,000		103,000,000
Net assets	$52,436,000,000		$56,253,000,000
[1]	Parenthetical amounts represent assets and liabilities for which we have elected the fair value option.
[2]	Our consolidated assets at March 31, 2015, and December 31, 2014, include the following assets of certain variable interest entities (VIEs) that can only be used to settle the liabilities of those VIEs: Cash and due from banks, $155 million and $117 million; Investment securities, $749 million and $875 million; Net loans, $4.8 billion and $4.5 billion; Other assets, $314 million and $316 million, and Total assets, $6.0 billion and 5.8 billion, respectively.
[3]	Our consolidated liabilities at March 31, 2015, and December 31, 2014, include the following VIE liabilities for which the VIE creditors do not have recourse to Wells Fargo: Accrued expenses and other liabilities, $48 million and $49 million; Long-term debt, $1.6 billion and $1.6 billion; and Total liabilities, $1.6 billion and $1.7 billion, respectively.

Securitizations_and_Variable_I4

Securitizations and Variable Interest Entities, Significant Continuing Involvement - Unconsolidated VIEs (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Millions, unless otherwise specified
Variable Interest Entity [Line Items]
Total VIE assets	$1,534,483	$1,566,049
Conforming Residential Mortgage Loan Securitization [Member]
Variable Interest Entity [Line Items]
Total VIE assets	1,244,678	1,268,200
Other/Nonconforming Residential Mortgage Loan Securitization [Member]
Variable Interest Entity [Line Items]
Total VIE assets	30,561	32,213
Commercial Mortgage Backed Securities [Member]
Variable Interest Entity [Line Items]
Total VIE assets	192,361	196,510
Collateralized Debt Obligations Debt Securities [Member]
Variable Interest Entity [Line Items]
Total VIE assets	4,628	5,039
Collateralized Debt Obligations Loans [Member]
Variable Interest Entity [Line Items]
Total VIE assets	5,105	5,347
Asset-based finance structures [Member]
Variable Interest Entity [Line Items]
Total VIE assets	17,341	18,954
Tax Credit Structures [Member]
Variable Interest Entity [Line Items]
Total VIE assets	23,688	22,859
Collateralized Loan Obligations [Member]
Variable Interest Entity [Line Items]
Total VIE assets	1,672	1,251
Investment Funds [Member]
Variable Interest Entity [Line Items]
Total VIE assets	2,149	2,764
Other securitizations and transactions [Member]
Variable Interest Entity [Line Items]
Total VIE assets	12,300	12,912
Debt and equity interests [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	37,950	40,645
Maximum exposure to loss	37,950	40,645
Debt and equity interests [Member] | Conforming Residential Mortgage Loan Securitization [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	2,870	2,846
Maximum exposure to loss	2,870	2,846
Debt and equity interests [Member] | Other/Nonconforming Residential Mortgage Loan Securitization [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	1,530	1,644
Maximum exposure to loss	1,530	1,644
Debt and equity interests [Member] | Commercial Mortgage Backed Securities [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	7,442	8,756
Maximum exposure to loss	7,442	8,756
Debt and equity interests [Member] | Collateralized Debt Obligations Debt Securities [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	6	11
Maximum exposure to loss	6	11
Debt and equity interests [Member] | Collateralized Debt Obligations Loans [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	4,981	5,221
Maximum exposure to loss	4,981	5,221
Debt and equity interests [Member] | Asset-based finance structures [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	11,881	13,044
Maximum exposure to loss	11,881	13,044
Debt and equity interests [Member] | Tax Credit Structures [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	8,007	7,809
Maximum exposure to loss	8,007	7,809
Debt and equity interests [Member] | Collateralized Loan Obligations [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	488	518
Maximum exposure to loss	488	518
Debt and equity interests [Member] | Investment Funds [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	49	49
Maximum exposure to loss	49	49
Debt and equity interests [Member] | Other securitizations and transactions [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	696	747
Maximum exposure to loss	696	747
Servicing assets [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	11,589	12,562
Maximum exposure to loss	11,589	12,562
Servicing assets [Member] | Conforming Residential Mortgage Loan Securitization [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	10,716	11,684
Maximum exposure to loss	10,716	11,684
Servicing assets [Member] | Other/Nonconforming Residential Mortgage Loan Securitization [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	195	209
Maximum exposure to loss	195	209
Servicing assets [Member] | Commercial Mortgage Backed Securities [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	660	650
Maximum exposure to loss	660	650
Servicing assets [Member] | Collateralized Debt Obligations Debt Securities [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	0	0
Maximum exposure to loss	0	0
Servicing assets [Member] | Collateralized Debt Obligations Loans [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	0	0
Maximum exposure to loss	0	0
Servicing assets [Member] | Asset-based finance structures [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	0	0
Maximum exposure to loss	0	0
Servicing assets [Member] | Tax Credit Structures [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	0	0
Maximum exposure to loss	0	0
Servicing assets [Member] | Collateralized Loan Obligations [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	0	0
Maximum exposure to loss	0	0
Servicing assets [Member] | Investment Funds [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	0	0
Maximum exposure to loss	0	0
Servicing assets [Member] | Other securitizations and transactions [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	18	19
Maximum exposure to loss	18	19
Derivative [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	312	325
Maximum exposure to loss	623	653
Derivative [Member] | Conforming Residential Mortgage Loan Securitization [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	0	0
Maximum exposure to loss	0	0
Derivative [Member] | Other/Nonconforming Residential Mortgage Loan Securitization [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	0	0
Maximum exposure to loss	0	0
Derivative [Member] | Commercial Mortgage Backed Securities [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	250	251
Maximum exposure to loss	250	251
Derivative [Member] | Collateralized Debt Obligations Debt Securities [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	160	163
Maximum exposure to loss	160	163
Derivative [Member] | Collateralized Debt Obligations Loans [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	0	0
Maximum exposure to loss	0	0
Derivative [Member] | Asset-based finance structures [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	-75	-71
Maximum exposure to loss	91	89
Derivative [Member] | Tax Credit Structures [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	0	0
Maximum exposure to loss	0	0
Derivative [Member] | Collateralized Loan Obligations [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	0	0
Maximum exposure to loss	0	0
Derivative [Member] | Investment Funds [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	0	0
Maximum exposure to loss	0	0
Derivative [Member] | Other securitizations and transactions [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	-23	-18
Maximum exposure to loss	122	150
Other commitments and guarantees [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	-3,390	-3,316
Maximum exposure to loss	10,462	10,247
Other commitments and guarantees [Member] | Conforming Residential Mortgage Loan Securitization [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	-562	-581
Maximum exposure to loss	2,215	2,507
Other commitments and guarantees [Member] | Other/Nonconforming Residential Mortgage Loan Securitization [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	-7	-8
Maximum exposure to loss	347	345
Other commitments and guarantees [Member] | Commercial Mortgage Backed Securities [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	-23	-32
Maximum exposure to loss	6,209	5,715
Other commitments and guarantees [Member] | Collateralized Debt Obligations Debt Securities [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	-102	-105
Maximum exposure to loss	102	105
Other commitments and guarantees [Member] | Collateralized Debt Obligations Loans [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	0	0
Maximum exposure to loss	0	0
Other commitments and guarantees [Member] | Asset-based finance structures [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	0	0
Maximum exposure to loss	658	656
Other commitments and guarantees [Member] | Tax Credit Structures [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	-2,690	-2,585
Maximum exposure to loss	774	725
Other commitments and guarantees [Member] | Collateralized Loan Obligations [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	0	0
Maximum exposure to loss	0	38
Other commitments and guarantees [Member] | Investment Funds [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	0	0
Maximum exposure to loss	0	0
Other commitments and guarantees [Member] | Other securitizations and transactions [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	-6	-5
Maximum exposure to loss	157	156
Net assets [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	46,461	50,216
Net assets [Member] | Conforming Residential Mortgage Loan Securitization [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	13,024	13,949
Net assets [Member] | Other/Nonconforming Residential Mortgage Loan Securitization [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	1,718	1,845
Net assets [Member] | Commercial Mortgage Backed Securities [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	8,329	9,625
Net assets [Member] | Collateralized Debt Obligations Debt Securities [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	64	69
Net assets [Member] | Collateralized Debt Obligations Loans [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	4,981	5,221
Net assets [Member] | Asset-based finance structures [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	11,806	12,973
Net assets [Member] | Tax Credit Structures [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	5,317	5,224
Net assets [Member] | Collateralized Loan Obligations [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	488	518
Net assets [Member] | Investment Funds [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	49	49
Net assets [Member] | Other securitizations and transactions [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	685	743
Total exposure [Member]
Variable Interest Entity [Line Items]
Maximum exposure to loss	60,624	64,107
Total exposure [Member] | Conforming Residential Mortgage Loan Securitization [Member]
Variable Interest Entity [Line Items]
Maximum exposure to loss	15,801	17,037
Total exposure [Member] | Other/Nonconforming Residential Mortgage Loan Securitization [Member]
Variable Interest Entity [Line Items]
Maximum exposure to loss	2,072	2,198
Total exposure [Member] | Commercial Mortgage Backed Securities [Member]
Variable Interest Entity [Line Items]
Maximum exposure to loss	14,561	15,372
Total exposure [Member] | Collateralized Debt Obligations Debt Securities [Member]
Variable Interest Entity [Line Items]
Maximum exposure to loss	268	279
Total exposure [Member] | Collateralized Debt Obligations Loans [Member]
Variable Interest Entity [Line Items]
Maximum exposure to loss	4,981	5,221
Total exposure [Member] | Asset-based finance structures [Member]
Variable Interest Entity [Line Items]
Maximum exposure to loss	12,630	13,789
Total exposure [Member] | Tax Credit Structures [Member]
Variable Interest Entity [Line Items]
Maximum exposure to loss	8,781	8,534
Total exposure [Member] | Collateralized Loan Obligations [Member]
Variable Interest Entity [Line Items]
Maximum exposure to loss	488	556
Total exposure [Member] | Investment Funds [Member]
Variable Interest Entity [Line Items]
Maximum exposure to loss	49	49
Total exposure [Member] | Other securitizations and transactions [Member]
Variable Interest Entity [Line Items]
Maximum exposure to loss	$993	$1,072

Securitizations_and_Variable_I5

Securitizations and Variable Interest Entities, Cash Flow Securitizations (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Mortgage loans [Member]
Cash Flow Securitizations [Abstract]
Proceeds from securitizations and whole loan sales	$41,909	$37,614
Fees from servicing rights retained	935	1,028
Cash flows from other interests held	266	293
Servicing advances, net of repayments	-100	-273
Other financial assets [Member]
Cash Flow Securitizations [Abstract]
Proceeds from securitizations and whole loan sales	21	0
Fees from servicing rights retained	2	2
Cash flows from other interests held	12	21
Servicing advances, net of repayments	0	0
Non-Agency Securitizations And Whole Loan Transactions [Member] | Mortgage loans [Member]
Cash Flow Securitizations [Abstract]
Repurchases of assets/loss reimbursements	6	3
Non-Agency Securitizations And Whole Loan Transactions [Member] | Other financial assets [Member]
Cash Flow Securitizations [Abstract]
Repurchases of assets/loss reimbursements	0	0
Agency securitizations | Mortgage loans [Member]
Cash Flow Securitizations [Abstract]
Repurchases of assets/loss reimbursements	62	76
Agency securitizations | Other financial assets [Member]
Cash Flow Securitizations [Abstract]
Repurchases of assets/loss reimbursements	$0	$0

Securitizations_and_Variable_I6

Securitizations and Variable Interest Entities, Key Economic Assumptions - Mortgage Servicing Assets (Details) (Residential mortgage servicing rights [Member])	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Residential mortgage servicing rights [Member]
Fair Value Assumption, Date of Securitization or Asset-backed Financing Arrangement, Transferor's Continuing Involvement, Servicing Assets or Liabilities [Line Items]
Prepayment speed	13.00%	12.10%
Discount rate	7.50%	7.80%
Cost to service ($ per loan)	237	230

Securitizations_and_Variable_I7

Securitizations and Variable Interest Entities, Key Economic Assumptions - Mortgage Servicing Rights (Details) (USD $)	3 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Decrease in fair value from:
200 basis point increase	$101	$130
Residential mortgage servicing rights [Member]
Sensitivity Analysis of Fair Value of Interests Continued to be Held by Transferor, Servicing Assets or Liabilities, Impact of Adverse Change in Assumption [Line Items]
Fair value of interests held	11,739	12,738
Expected weighted-average life (in years)	5 years 4 months 12 days	5 years 8 months 12 days
Key economic assumptions:
Prepayment speed assumption	13.20%	12.50%
Decrease in fair value from:
10% adverse change	715	738
25% adverse change	1,695	1,754
Discount rate assumption	7.40%	7.60%
Decrease in fair value from:
100 basis point increase	563	617
200 basis point increase	1,072	1,178
Cost to service assumption ($ per loan)	174	179
Decrease in fair value from:
10% adverse change	559	579
25% adverse change	1,397	1,433
Interest-Only Strips [Member]
Sensitivity Analysis of Fair Value of Interests Continued to be Held by Transferor, Servicing Assets or Liabilities, Impact of Adverse Change in Assumption [Line Items]
Fair value of interests held	122	117
Expected weighted-average life (in years)	3 years 9 months 18 days	3 years 10 months 24 days
Key economic assumptions:
Prepayment speed assumption	12.00%	11.40%
Decrease in fair value from:
10% adverse change	2	2
25% adverse change	6	6
Discount rate assumption	15.40%	18.70%
Decrease in fair value from:
100 basis point increase	3	2
200 basis point increase	5	4
Subordinated bonds [Member] | Commercial Securitizations [Member]
Sensitivity Analysis of Fair Value of Interests Continued to be Held by Transferor, Servicing Assets or Liabilities, Impact of Adverse Change in Assumption [Line Items]
Fair value of interests held	295	294
Expected weighted-average life (in years)	2 years 8 months 12 days	2 years 10 months 24 days
Decrease in fair value from:
Discount rate assumption	4.40%	4.70%
Decrease in fair value from:
100 basis point increase	7	8
200 basis point increase	14	15
Decrease in fair value from:
Credit loss assumption	3.90%	4.10%
Decrease in fair value from:
10% higher losses	1	3
25% higher losses	7	10
Subordinated bonds [Member] | Consumer Securitizations [Member]
Sensitivity Analysis of Fair Value of Interests Continued to be Held by Transferor, Servicing Assets or Liabilities, Impact of Adverse Change in Assumption [Line Items]
Fair value of interests held	36	36
Expected weighted-average life (in years)	5 years 3 months 18 days	5 years 6 months
Key economic assumptions:
Prepayment speed assumption	8.10%	7.10%
Decrease in fair value from:
10% adverse change	0	0
25% adverse change	0	0
Discount rate assumption	3.60%	3.90%
Decrease in fair value from:
100 basis point increase	2	2
200 basis point increase	3	3
Decrease in fair value from:
Credit loss assumption	0.30%	0.40%
Decrease in fair value from:
10% higher losses	0	0
25% higher losses	0	0
Senior bonds [Member] | Commercial Securitizations [Member]
Sensitivity Analysis of Fair Value of Interests Continued to be Held by Transferor, Servicing Assets or Liabilities, Impact of Adverse Change in Assumption [Line Items]
Fair value of interests held	555	546
Expected weighted-average life (in years)	6 years 0 months 0 days	6 years 2 months 12 days
Decrease in fair value from:
Discount rate assumption	2.40%	2.80%
Decrease in fair value from:
100 basis point increase	28	29
200 basis point increase	55	55
Decrease in fair value from:
Credit loss assumption	0.00%	0.00%
Decrease in fair value from:
10% higher losses	0	0
25% higher losses	$0	$0

Securitizations_and_Variable_I8

Securitizations and Variable Interest Entities, Principal Balances of Off-Balance Sheet Securitized Loans (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Principal Balances - Off-Balance Sheet Securitized Loans [Abstract]
Total loans	$1,408,597		$1,437,817
Delinquent loans and foreclosed assets	34,598		36,663
Net charge-offs	257	778
Total Commercial [Member]
Principal Balances - Off-Balance Sheet Securitized Loans [Abstract]
Total loans	110,560		114,081
Delinquent loans and foreclosed assets	8,051		7,949
Net charge-offs	52	634
Real estate mortgage [Member]
Principal Balances - Off-Balance Sheet Securitized Loans [Abstract]
Total loans	110,560		114,081
Delinquent loans and foreclosed assets	8,051		7,949
Net charge-offs	52	634
Total Consumer [Member]
Principal Balances - Off-Balance Sheet Securitized Loans [Abstract]
Total loans	1,298,037		1,323,736
Delinquent loans and foreclosed assets	26,547		28,714
Net charge-offs	205	144
Real estate 1-4 family first mortgage [Member]
Principal Balances - Off-Balance Sheet Securitized Loans [Abstract]
Total loans	1,296,484		1,322,136
Delinquent loans and foreclosed assets	26,477		28,639
Net charge-offs	205	144
Real estate 1-4 family junior lien mortgage [Member]
Principal Balances - Off-Balance Sheet Securitized Loans [Abstract]
Total loans	0		1
Delinquent loans and foreclosed assets	0		0
Net charge-offs	0	0
Other revolving credit and installment [Member]
Principal Balances - Off-Balance Sheet Securitized Loans [Abstract]
Total loans	1,553		1,599
Delinquent loans and foreclosed assets	70		75
Net charge-offs	$0	$0

Securitizations_and_Variable_I9

Securitizations and Variable Interest Entities, Secured Borrowing and Consolidated Variable Interest Entity (Details) (USD $)	Mar. 31, 2015		Dec. 31, 2014
Variable Interest Entity [Line Items]
Assets	$1,737,737,000,000	[1]	$1,687,155,000,000	[1]
Liabilities	-1,547,773,000,000	[2]	-1,501,893,000,000	[2]
Noncontrolling interests	-1,168,000,000		-868,000,000
Total secured borrowings [Member]
Variable Interest Entity [Line Items]
Total VIE assets	9,187,000,000		10,476,000,000
Total secured borrowings [Member] | Municipal tender option bond securitizations [Member]
Variable Interest Entity [Line Items]
Total VIE assets	4,355,000,000		5,422,000,000
Total secured borrowings [Member] | Commercial real estate loans [Member]
Variable Interest Entity [Line Items]
Total VIE assets	181,000,000		250,000,000
Total secured borrowings [Member] | Residential mortgage securitizations [Member]
Variable Interest Entity [Line Items]
Total VIE assets	4,651,000,000		4,804,000,000
Consolidated VIEs [Member]
Variable Interest Entity [Line Items]
Total VIE assets	6,649,000,000		6,423,000,000
Assets	6,048,000,000		5,817,000,000
Liabilities	-1,610,000,000		-1,677,000,000
Noncontrolling interests	-111,000,000		-103,000,000
Net assets	4,327,000,000		4,037,000,000
Consolidated VIEs [Member] | Commercial real estate loans [Member]
Variable Interest Entity [Line Items]
Total VIE assets	529,000,000
Assets	529,000,000
Liabilities	0
Noncontrolling interests	0
Net assets	529,000,000
Consolidated VIEs [Member] | Nonconforming residential mortgage loan securitizations [Member]
Variable Interest Entity [Line Items]
Total VIE assets	4,841,000,000		5,041,000,000
Consolidated VIEs [Member] | Structured asset finance [Member]
Variable Interest Entity [Line Items]
Total VIE assets	46,000,000		47,000,000
Consolidated VIEs [Member] | Investment funds [Member]
Variable Interest Entity [Line Items]
Total VIE assets	810,000,000		904,000,000
Consolidated VIEs [Member] | Other securitizations and transactions [Member]
Variable Interest Entity [Line Items]
Total VIE assets	423,000,000		431,000,000
Total secured borrowings and consolidated VIEs [Member]
Variable Interest Entity [Line Items]
Total VIE assets	15,836,000,000		16,899,000,000
Carrying value [Member] | Total secured borrowings [Member]
Variable Interest Entity [Line Items]
Assets	8,926,000,000		10,132,000,000
Liabilities	-7,278,000,000		-8,132,000,000
Noncontrolling interests	0		0
Net assets	1,648,000,000		2,000,000,000
Carrying value [Member] | Total secured borrowings [Member] | Municipal tender option bond securitizations [Member]
Variable Interest Entity [Line Items]
Assets	3,858,000,000		4,837,000,000
Liabilities	-2,514,000,000		-3,143,000,000
Noncontrolling interests	0		0
Net assets	1,344,000,000		1,694,000,000
Carrying value [Member] | Total secured borrowings [Member] | Commercial real estate loans [Member]
Variable Interest Entity [Line Items]
Assets	181,000,000		250,000,000
Liabilities	0		-63,000,000
Noncontrolling interests	0		0
Net assets	181,000,000		187,000,000
Carrying value [Member] | Total secured borrowings [Member] | Residential mortgage securitizations [Member]
Variable Interest Entity [Line Items]
Assets	4,887,000,000		5,045,000,000
Liabilities	-4,764,000,000		-4,926,000,000
Noncontrolling interests	0		0
Net assets	123,000,000		119,000,000
Carrying value [Member] | Consolidated VIEs [Member]
Variable Interest Entity [Line Items]
Assets	6,048,000,000		5,817,000,000
Liabilities	-1,610,000,000		-1,677,000,000
Noncontrolling interests	-111,000,000		-103,000,000
Net assets	4,327,000,000		4,037,000,000
Carrying value [Member] | Consolidated VIEs [Member] | Nonconforming residential mortgage loan securitizations [Member]
Variable Interest Entity [Line Items]
Assets	4,296,000,000		4,491,000,000
Liabilities	-1,452,000,000		-1,509,000,000
Noncontrolling interests	0		0
Net assets	2,844,000,000		2,982,000,000
Carrying value [Member] | Consolidated VIEs [Member] | Structured asset finance [Member]
Variable Interest Entity [Line Items]
Assets	46,000,000		47,000,000
Liabilities	-24,000,000		-23,000,000
Noncontrolling interests	0		0
Net assets	22,000,000		24,000,000
Carrying value [Member] | Consolidated VIEs [Member] | Investment funds [Member]
Variable Interest Entity [Line Items]
Assets	809,000,000		904,000,000
Liabilities	-1,000,000		-2,000,000
Noncontrolling interests	0		0
Net assets	808,000,000		902,000,000
Carrying value [Member] | Consolidated VIEs [Member] | Other securitizations and transactions [Member]
Variable Interest Entity [Line Items]
Assets	368,000,000		375,000,000
Liabilities	-133,000,000		-143,000,000
Noncontrolling interests	-111,000,000		-103,000,000
Net assets	124,000,000		129,000,000
Carrying value [Member] | Total secured borrowings and consolidated VIEs [Member]
Variable Interest Entity [Line Items]
Assets	14,974,000,000		15,949,000,000
Liabilities	-8,888,000,000		-9,809,000,000
Noncontrolling interests	-111,000,000		-103,000,000
Net assets	$5,975,000,000		$6,037,000,000
[1]	Our consolidated assets at March 31, 2015, and December 31, 2014, include the following assets of certain variable interest entities (VIEs) that can only be used to settle the liabilities of those VIEs: Cash and due from banks, $155 million and $117 million; Investment securities, $749 million and $875 million; Net loans, $4.8 billion and $4.5 billion; Other assets, $314 million and $316 million, and Total assets, $6.0 billion and 5.8 billion, respectively.
[2]	Our consolidated liabilities at March 31, 2015, and December 31, 2014, include the following VIE liabilities for which the VIE creditors do not have recourse to Wells Fargo: Accrued expenses and other liabilities, $48 million and $49 million; Long-term debt, $1.6 billion and $1.6 billion; and Total liabilities, $1.6 billion and $1.7 billion, respectively.

Mortgage_Banking_Activities_Te

Mortgage Banking Activities Textuals (Details) (USD $)	Mar. 31, 2015	Mar. 31, 2014
Liability For Mortgage Loans Repurchase Losses [Member]
Mortgage Banking Activities (Textual) [Abstract]
Range of possible loss, portion not accrued	$936,000,000
Commercial Mortgage Servicing [Member] | Amortized [Member]
Mortgage Banking Activities (Textual) [Abstract]
Valuation allowance	$0	$0

Mortgage_Banking_Activities_Mo

Mortgage Banking Activities, Mortgage Servicing Rights Carried at Fair Value (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Changes in MSRs measured at fair value
Fair value, beginning of period	$12,738
Changes in fair value:
Net changes in valuation model inputs or assumptions	-773	-441
Other changes in fair value	-533	-475
Total changes in fair value	-1,306	-916
Fair value, end of period	11,739
Carried at fair value [Member]
Changes in MSRs measured at fair value
Fair value, beginning of period	12,738	15,580
Servicing from securitizations or asset transfers	308	289
Sales	-1	0
Net additions	307	289
Changes in fair value:
Net changes in valuation model inputs or assumptions	-773	-441
Other changes in fair value	-533	-475
Total changes in fair value	-1,306	-916
Fair value, end of period	11,739	14,953
Carried at fair value [Member] | Mortgage interest rates [Member]
Changes in fair value:
Net changes in valuation model inputs or assumptions	-572	-509
Carried at fair value [Member] | Servicing and foreclosure costs [Member]
Changes in fair value:
Net changes in valuation model inputs or assumptions	-18	-34
Carried at fair value [Member] | Prepayment estimates and other [Member]
Changes in fair value:
Net changes in valuation model inputs or assumptions	($183)	$102

Mortgage_Banking_Activities_Am

Mortgage Banking Activities, Amortized Mortgage Servicing Rights (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Changes in amortized MSRs
Amortization	($62)	($64)
Amortized [Member]
Changes in amortized MSRs
Balance, beginning of period	1,242	1,229
Purchases	22	40
Servicing from securitizations or asset transfers	50	14
Amortization	-62	-64
Balance, end of period	1,252	1,219
Fair value of amortized MSRs:
Beginning of period	1,637	1,575
End of period	$1,522	$1,624

Mortgage_Banking_Activities_Ma

Mortgage Banking Activities, Managed Servicing Portfolio Components (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Billions, unless otherwise specified
Components of Managed Servicing Portfolio [Abstract]
Serviced for others	$1,835	$1,861
Total managed servicing portfolio	2,303	2,327
Ratio of MSRs to related loans serviced for others	0.71%	0.75%
Residential Mortgage Servicing [Member]
Components of Managed Servicing Portfolio [Abstract]
Serviced for others	1,374	1,405
Owned loans serviced	344	342
Subserviced for others	5	5
Total managed servicing portfolio	1,723	1,752
Commercial Mortgage Servicing [Member]
Components of Managed Servicing Portfolio [Abstract]
Serviced for others	461	456
Owned loans serviced	112	112
Subserviced for others	7	7
Total managed servicing portfolio	$580	$575

Mortgage_Banking_Activities_No

Mortgage Banking Activities, Noninterest Income (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Servicing fees:
Contractually specified servicing fees	$1,020	$1,082
Late charges	53	56
Ancillary fees	71	80
Unreimbursed direct servicing costs	-134	-148
Net servicing fees	1,010	1,070
Changes in fair value of MSRs carried at fair value:
Due to changes in valuation model inputs or assumptions	-773	-441
Other changes in fair value	-533	-475
Total changes in fair value	-1,306	-916
Amortization	-62	-64
Net derivative gains (losses) from economic hedges	881	848
Total servicing income, net	523	938
Net gains on mortgage loan origination/sales activities	1,024	572
Total mortgage banking noninterest income	1,547	1,510
Market-related valuation changes to MSRs, net of hedge results	$108	$407

Mortgage_Banking_Activities_Li

Mortgage Banking Activities, Liability for Mortgage Loan Repurchase Losses (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Liability For Mortgage Loan Repurchase Losses [Abstract]
Balance, beginning of period	$615	$899
Provision for repurchase losses:
Loan sales	10	10
Change in estimate	-26	-4
Total additions (reductions)	-16	6
Losses	-13	-106
Balance, end of period	$586	$799

Intangible_Assets_Details

Intangible Assets (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Amortized intangible assets:
Gross carrying value	$18,988	$18,919
Accumulated amortization	-13,631	-13,259
Net carrying value	5,357	5,660
Unamortized intangible assets:
Mortgage servicing rights	11,739	12,738
Goodwill	25,705	25,705	25,637	25,637
Trademark	14	14
MSRs [Member]
Amortized intangible assets:
Gross carrying value	2,975	2,906
Accumulated amortization	-1,723	-1,664
Net carrying value	1,252	1,242
Core deposit intangibles [Member]
Amortized intangible assets:
Gross carrying value	12,834	12,834
Accumulated amortization	-9,529	-9,273
Net carrying value	3,305	3,561
Customer relationship and other intangibles [Member]
Amortized intangible assets:
Gross carrying value	3,179	3,179
Accumulated amortization	-2,379	-2,322
Net carrying value	$800	$857

Intangible_Assets_Amortization

Intangible Assets, Amortization Expense (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Finite-Lived Intangible Assets, Future Amortization Expense, Current and Five Succeeding Fiscal Years [Abstract]
Three months ended March 31, 2015 (actual)	$312	$341
Estimate for the remainder of 2015	1,124
Estimate for year ended December 31,
2016	1,343
2017	1,215
2018	1,094
2019	133
2020	115
Finite lived intangible assets [Member]
Finite-Lived Intangible Assets, Future Amortization Expense, Current and Five Succeeding Fiscal Years [Abstract]
Three months ended March 31, 2015 (actual)	375
MSRs [Member]
Finite-Lived Intangible Assets, Future Amortization Expense, Current and Five Succeeding Fiscal Years [Abstract]
Three months ended March 31, 2015 (actual)	62
Estimate for the remainder of 2015	189
Estimate for year ended December 31,
2016	213
2017	167
2018	137
2019	121
2020	107
Core deposit intangibles [Member]
Finite-Lived Intangible Assets, Future Amortization Expense, Current and Five Succeeding Fiscal Years [Abstract]
Three months ended March 31, 2015 (actual)	256
Estimate for the remainder of 2015	766
Estimate for year ended December 31,
2016	919
2017	851
2018	769
2019	0
2020	0
Customer relationship and other intangibles [Member]
Finite-Lived Intangible Assets, Future Amortization Expense, Current and Five Succeeding Fiscal Years [Abstract]
Three months ended March 31, 2015 (actual)	57
Estimate for the remainder of 2015	169
Estimate for year ended December 31,
2016	211
2017	197
2018	188
2019	12
2020	$8

Intangible_Assets_Allocation_o

Intangible Assets, Allocation of Goodwill to Operating Segments (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Goodwill [Roll Forward]
Goodwill, Beginning Balance	$25,705	$25,705	$25,637	$25,637
Goodwill, Ending Balance	25,705	25,705	25,637	25,637
Community Banking [Member]
Goodwill [Roll Forward]
Goodwill, Beginning Balance	17,914	17,914	17,922	17,922
Goodwill, Ending Balance	17,914	17,914	17,922	17,922
Wholesale Banking [Member]
Goodwill [Roll Forward]
Goodwill, Beginning Balance	7,420	7,420	7,344	7,344
Goodwill, Ending Balance	7,420	7,420	7,344	7,344
Wealth, Brokerage and Retirement [Member]
Goodwill [Roll Forward]
Goodwill, Beginning Balance	371	371	371	371
Goodwill, Ending Balance	$371	$371	$371	$371

Guarantees_Pledged_Assets_and_2

Guarantees, Pledged Assets and Collateral Textuals (Details) (USD $)	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014	Dec. 31, 2014
Guarantees (Textuals) [Abstract]
Maximum exposure to loss	$70,381,000,000			$70,122,000,000
Securities Loaned	33,000,000			211,000,000
Total assets	1,737,737,000,000	[1]		1,687,155,000,000	[1]
Securities owned and pledged as collateral related to repurchase agreements not available to be repledged, Fair Value	6,300,000,000			6,900,000,000
Mortgages held for sale	11,100,000,000			8,700,000,000
Carrying value of delinquent loans eligible for repurchase	1,100,000,000			1,700,000,000
Net amounts in consolidated balance sheet	54,875,000,000			51,671,000,000
Collateral received, fair value	76,400,000,000			64,500,000,000
Collateral received with the right to sell or repledge	76,400,000,000			64,500,000,000
Collateral sold or repledged	52,700,000,000			40,800,000,000
Collateral pledged, fair value	78,200,000,000			56,500,000,000
Fed Funds Sold, Securities Purchased under Resale Agreements and Other Short-Term Investments [Member]
Guarantees (Textuals) [Abstract]
Net amounts in consolidated balance sheet	40,100,000,000			36,800,000,000
Loans [Member]
Guarantees (Textuals) [Abstract]
Net amounts in consolidated balance sheet	14,800,000,000			14,900,000,000
Direct pay letters of credit (DPLCs) [Member]
Guarantees (Textuals) [Abstract]
Maximum exposure to loss	14,400,000,000			15,000,000,000
Third party clearing indemnifications [Member]
Guarantees (Textuals) [Abstract]
Maximum exposure to loss	6,100,000,000			5,700,000,000
Third-party clearing customer obligations	1,100,000,000			950,000,000
Collateral provided to third-party clearing agents	5,400,000,000			5,600,000,000
Loans and MHFS sold with recourse [Member]
Guarantees (Textuals) [Abstract]
Loans repurchased	1,000,000		1,000,000
VIEs that we consolidate [Member]
Guarantees (Textuals) [Abstract]
Total assets	6,048,000,000			5,817,000,000
Secured Borrowing transactions excluded [Member]
Guarantees (Textuals) [Abstract]
Total assets	8,926,000,000			10,132,000,000
Trading assets and other [Member]
Guarantees (Textuals) [Abstract]
Securities owned and pledged as collateral available to be repledged, Fair Value	69,200,000,000			49,400,000,000
Investment securities [Member]
Guarantees (Textuals) [Abstract]
Securities owned and pledged as collateral available to be repledged, Fair Value	2,700,000,000			164,000,000
Securities owned and pledged as collateral related to repurchase agreements not available to be repledged, carrying value	5,800,000,000			6,600,000,000
Securities owned and pledged as collateral related to repurchase agreements not available to be repledged, Fair Value	$5,800,000,000			$6,800,000,000
[1]	Our consolidated assets at March 31, 2015, and December 31, 2014, include the following assets of certain variable interest entities (VIEs) that can only be used to settle the liabilities of those VIEs: Cash and due from banks, $155 million and $117 million; Investment securities, $749 million and $875 million; Net loans, $4.8 billion and $4.5 billion; Other assets, $314 million and $316 million, and Total assets, $6.0 billion and 5.8 billion, respectively.

Guarantees_Pledged_Assets_and_3

Guarantees, Pledged Assets and Collateral (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Millions, unless otherwise specified
Guarantor Obligations [Line Items]
Carrying value	$755	$606
Maximum exposure to loss, expires in one year or less	26,888	27,515
Maximum exposure to loss, expires in one year through three years	17,030	16,098
Maximum exposure to loss, expires in three years through five years	9,449	9,963
Maximum exposure to loss, expires after five years	17,014	16,546
Maximum exposure to loss	70,381	70,122
Security Owned and Pledged as Collateral, Fair Value [Abstract]
Trading assets and other	69,685	49,685
Investment securities	94,333	101,997
Mortgages held for sale and loans	426,953	418,338
Total pledged assets	590,971	570,020
Non-investment grade [Member]
Guarantor Obligations [Line Items]
Maximum exposure to loss	23,311	23,823
Written put options [Member]
Guarantor Obligations [Line Items]
Carrying value	611	469
Maximum exposure to loss, expires in one year or less	8,421	7,644
Maximum exposure to loss, expires in one year through three years	5,642	5,256
Maximum exposure to loss, expires in three years through five years	3,081	2,822
Maximum exposure to loss, expires after five years	2,308	2,409
Maximum exposure to loss	19,452	18,131
Written put options [Member] | Non-investment grade [Member]
Guarantor Obligations [Line Items]
Maximum exposure to loss	8,399	7,902
Standby Letters of Credit [Member]
Guarantor Obligations [Line Items]
Carrying value	57	41
Maximum exposure to loss, expires in one year or less	16,267	16,271
Maximum exposure to loss, expires in one year through three years	10,695	10,269
Maximum exposure to loss, expires in three years through five years	5,644	6,295
Maximum exposure to loss, expires after five years	640	645
Maximum exposure to loss	33,246	33,480
Standby Letters of Credit [Member] | Non-investment grade [Member]
Guarantor Obligations [Line Items]
Maximum exposure to loss	8,433	8,447
Securities lending and other indemnifications [Member]
Guarantor Obligations [Line Items]
Carrying value	0	0
Maximum exposure to loss, expires in one year or less	0	0
Maximum exposure to loss, expires in one year through three years	0	2
Maximum exposure to loss, expires in three years through five years	0	2
Maximum exposure to loss, expires after five years	6,153	5,948
Maximum exposure to loss	6,153	5,952
Securities lending and other indemnifications [Member] | Non-investment grade [Member]
Guarantor Obligations [Line Items]
Maximum exposure to loss	0	0
Loans and MHFS sold with recourse [Member]
Guarantor Obligations [Line Items]
Carrying value	63	72
Maximum exposure to loss, expires in one year or less	115	131
Maximum exposure to loss, expires in one year through three years	641	486
Maximum exposure to loss, expires in three years through five years	702	822
Maximum exposure to loss, expires after five years	5,716	5,386
Maximum exposure to loss	7,174	6,825
Loans and MHFS sold with recourse [Member] | Non-investment grade [Member]
Guarantor Obligations [Line Items]
Maximum exposure to loss	4,367	3,945
Factoring guarantee [Member]
Guarantor Obligations [Line Items]
Carrying value	0	0
Maximum exposure to loss, expires in one year or less	2,043	3,460
Maximum exposure to loss, expires in one year through three years	0	0
Maximum exposure to loss, expires in three years through five years	0	0
Maximum exposure to loss, expires after five years	0	0
Maximum exposure to loss	2,043	3,460
Factoring guarantee [Member] | Non-investment grade [Member]
Guarantor Obligations [Line Items]
Maximum exposure to loss	2,043	3,460
Other guarantees [Member]
Guarantor Obligations [Line Items]
Carrying value	24	24
Maximum exposure to loss, expires in one year or less	42	9
Maximum exposure to loss, expires in one year through three years	52	85
Maximum exposure to loss, expires in three years through five years	22	22
Maximum exposure to loss, expires after five years	2,197	2,158
Maximum exposure to loss	2,313	2,274
Other guarantees [Member] | Non-investment grade [Member]
Guarantor Obligations [Line Items]
Maximum exposure to loss	$69	$69

Guarantees_Offsetting_of_Resal

Guarantees, Offsetting of Resale and Repurchase Agreements and Securities Borrowing and Lending (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Millions, unless otherwise specified
Resale and securities borrowing agreements
Gross amounts recognized	$69,122	$58,148
Gross amounts offset in consolidated balance sheet	-14,247	-6,477
Net amounts in consolidated balance sheet	54,875	51,671
Collateral not recognized in consolidated balance sheet	-54,592	-51,624
Net amount	283	47
Repurchase and securities lending agreements
Gross amounts recognized	77,643	56,583
Gross amounts offset in consolidated balance sheet	-14,247	-6,477
Net amounts in consolidated balance sheet	63,396	50,106
Collateral pledged but not netted in consolidated balance sheet	-62,540	-49,713
Net amount	$856	$393

Legal_Actions_Details

Legal Actions (Details) (USD $)	0 Months Ended
In Millions, unless otherwise specified	Oct. 29, 2014	Aug. 05, 2013	Dec. 26, 2012	Aug. 10, 2010	Mar. 31, 2015
					legal_action
In re Order of Posting Litigation [Member]
Legal Actions (Textual) [Abstract]
Amounts to be paid in connection with legal or regulatory matters	$203	$203	$203	$203
In re Securities Lending Litigation [Member]
Legal Actions (Textual) [Abstract]
Legal actions, number					4
Liability for Contingent Litigation Losses [Member]
Legal Actions (Textual) [Abstract]
Range of possible loss, portion not accrued					1,200

Derivatives_Textuals_Details

Derivatives Textuals (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Derivatives (Textual) [Abstract]
Derivative assets subject to enforceable master netting arrangements	$90,000,000,000		$69,600,000,000
Derivative liabilities subject to enforceable master netting arrangements	95,900,000,000		75,000,000,000
Derivative assets not subject to enforceable master netting arrangements	19,800,000,000		18,900,000,000
Derivative liabilities not subject to enforceable master netting arrangements	9,300,000,000		8,800,000,000
Valuation adjustments for derivative assets	313,000,000		266,000,000
Valuation adjustments for derivative liabilities	50,000,000		56,000,000
Cash collateral netted against derivative assets	6,800,000,000		5,200,000,000
Cash collateral netted against derivative liabilities	5,700,000,000		4,600,000,000
Fair value asset derivatives, net	21,707,000,000		22,605,000,000
Time value component recognized as net interest income (expense) on forward derivatives excluded from the assessment of hedge effectiveness	-1,000,000	0
Deferred net gains on derivatives in other comprehensive income	852,000,000
Maximum length of time hedged in cash flow hedge	7 years
Change in value of derivatives excluded from assessment of cash flow hedge effectiveness	0	0
Gains (losses) on derivatives used to hedge residential mortgage servicing rights	881,000,000	848,000,000
Aggregate fair value of derivatives used for economic hedges net asset (liability)	489,000,000		492,000,000
Aggregate fair value of derivative loan commitments net asset (liability)	200,000,000		98,000,000
Aggregate fair value of derivative instruments with credit-risk-related contingent features, net liability	13,400,000,000		13,600,000,000
Collateral for derivative instruments with credit-risk-related contingent features	9,300,000,000		10,500,000,000
Additional collateral for derivative instruments with credit-risk-related contingent features	4,100,000,000		3,100,000,000
Trading assets [Member]
Derivatives (Textual) [Abstract]
Fair value asset derivatives, net	17,100,000,000		16,900,000,000
Other assets [Member]
Derivatives (Textual) [Abstract]
Fair value asset derivatives, net	4,600,000,000		5,700,000,000
Interest rate contract [Member]
Derivatives (Textual) [Abstract]
Fair value asset derivatives, net	5,694,000,000		7,647,000,000
Foreign exchange contract [Member]
Derivatives (Textual) [Abstract]
Fair value asset derivatives, net	4,165,000,000		2,481,000,000
Designated as Hedging Instrument [Member] | Interest rate contract [Member]
Derivatives (Textual) [Abstract]
Certain derivatives combined for designation as a hedge on a single instrument	1,900,000,000		1,900,000,000
Designated as Hedging Instrument [Member] | Foreign exchange contract [Member]
Derivatives (Textual) [Abstract]
Certain derivatives combined for designation as a hedge on a single instrument	$2,400,000,000		$2,700,000,000

Derivatives_Notional_or_Contra

Derivatives, Notional or Contractual Amounts (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Millions, unless otherwise specified
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Derivatives (trading and other assets)	$109,836	$88,474
Fair value asset derivatives, netting	-88,129	-65,869
Net amounts in consolidated balance sheet	21,707	22,605
Fair value liability derivatives	105,202	83,781
Fair value liability derivatives, netting	-86,777	-65,043
Net amounts in consolidated balance sheet	18,425	18,738
Interest rate contract [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Derivatives (trading and other assets)	83,194	63,698
Fair value asset derivatives, netting	-77,500	-56,051
Net amounts in consolidated balance sheet	5,694	7,647
Fair value liability derivatives	78,183	60,059
Fair value liability derivatives, netting	-73,377	-54,394
Net amounts in consolidated balance sheet	4,806	5,665
Commodity contract [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Derivatives (trading and other assets)	6,879	7,461
Fair value asset derivatives, netting	-1,308	-1,233
Net amounts in consolidated balance sheet	5,571	6,228
Fair value liability derivatives	7,523	7,702
Fair value liability derivatives, netting	-1,411	-1,459
Net amounts in consolidated balance sheet	6,112	6,243
Equity contract [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Derivatives (trading and other assets)	9,130	9,005
Fair value asset derivatives, netting	-2,992	-2,842
Net amounts in consolidated balance sheet	6,138	6,163
Fair value liability derivatives	6,783	7,038
Fair value liability derivatives, netting	-2,511	-2,845
Net amounts in consolidated balance sheet	4,272	4,193
Foreign exchange contract [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Derivatives (trading and other assets)	9,751	7,404
Fair value asset derivatives, netting	-5,586	-4,923
Net amounts in consolidated balance sheet	4,165	2,481
Fair value liability derivatives	11,616	7,827
Fair value liability derivatives, netting	-8,530	-5,511
Net amounts in consolidated balance sheet	3,086	2,316
Credit Contracts Protection Sold [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Derivatives (trading and other assets)	172	151
Fair value asset derivatives, netting	-117	-131
Net amounts in consolidated balance sheet	55	20
Fair value liability derivatives	851	943
Fair value liability derivatives, netting	-826	-713
Net amounts in consolidated balance sheet	25	230
Credit Contracts Protection Purchased [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Derivatives (trading and other assets)	710	755
Fair value asset derivatives, netting	-626	-689
Net amounts in consolidated balance sheet	84	66
Fair value liability derivatives	194	168
Fair value liability derivatives, netting	-122	-121
Net amounts in consolidated balance sheet	72	47
Other contract [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Fair value liability derivatives	52	44
Fair value liability derivatives, netting	0	0
Net amounts in consolidated balance sheet	52	44
Designated as Hedging Instrument [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Derivatives (trading and other assets)	9,037	7,288
Fair value liability derivatives	5,695	3,782
Designated as Hedging Instrument [Member] | Interest rate contract [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Notional or contractual amount	161,185	148,967
Derivatives (trading and other assets)	8,349	6,536
Fair value liability derivatives	2,956	2,435
Designated as Hedging Instrument [Member] | Foreign exchange contract [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Notional or contractual amount	26,369	26,778
Derivatives (trading and other assets)	688	752
Fair value liability derivatives	2,739	1,347
Not Designated as Hedging Instrument [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Derivatives (trading and other assets)	100,799	81,186
Fair value liability derivatives	99,507	79,999
Not Designated as Hedging Instrument [Member] | Free standing derivatives (economic hedges) [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Derivatives (trading and other assets)	1,669	1,339
Fair value liability derivatives	751	611
Not Designated as Hedging Instrument [Member] | Customer Accommodation, Trading, And Other Derivatives [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Derivatives (trading and other assets)	99,130	79,847
Fair value liability derivatives	98,756	79,388
Not Designated as Hedging Instrument [Member] | Interest rate contract [Member] | Free standing derivatives (economic hedges) [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Notional or contractual amount	238,419	221,527
Derivatives (trading and other assets)	775	697
Fair value liability derivatives	643	487
Not Designated as Hedging Instrument [Member] | Interest rate contract [Member] | Customer Accommodation, Trading, And Other Derivatives [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Notional or contractual amount	4,886,284	4,378,767
Derivatives (trading and other assets)	74,070	56,465
Fair value liability derivatives	74,584	57,137
Not Designated as Hedging Instrument [Member] | Commodity contract [Member] | Customer Accommodation, Trading, And Other Derivatives [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Notional or contractual amount	76,664	88,640
Derivatives (trading and other assets)	6,879	7,461
Fair value liability derivatives	7,523	7,702
Not Designated as Hedging Instrument [Member] | Equity contract [Member] | Free standing derivatives (economic hedges) [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Notional or contractual amount	5,959	5,219
Derivatives (trading and other assets)	432	367
Fair value liability derivatives	50	96
Not Designated as Hedging Instrument [Member] | Equity contract [Member] | Customer Accommodation, Trading, And Other Derivatives [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Notional or contractual amount	139,526	138,422
Derivatives (trading and other assets)	8,698	8,638
Fair value liability derivatives	6,733	6,942
Not Designated as Hedging Instrument [Member] | Foreign exchange contract [Member] | Free standing derivatives (economic hedges) [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Notional or contractual amount	16,722	14,405
Derivatives (trading and other assets)	462	275
Fair value liability derivatives	58	28
Not Designated as Hedging Instrument [Member] | Foreign exchange contract [Member] | Customer Accommodation, Trading, And Other Derivatives [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Notional or contractual amount	256,071	253,742
Derivatives (trading and other assets)	8,601	6,377
Fair value liability derivatives	8,819	6,452
Not Designated as Hedging Instrument [Member] | Credit Contracts Protection Sold [Member] | Customer Accommodation, Trading, And Other Derivatives [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Notional or contractual amount	13,207	12,304
Derivatives (trading and other assets)	172	151
Fair value liability derivatives	851	943
Not Designated as Hedging Instrument [Member] | Credit Contracts Protection Purchased [Member] | Customer Accommodation, Trading, And Other Derivatives [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Notional or contractual amount	17,936	16,659
Derivatives (trading and other assets)	710	755
Fair value liability derivatives	194	168
Not Designated as Hedging Instrument [Member] | Other contract [Member] | Customer Accommodation, Trading, And Other Derivatives [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Notional or contractual amount	1,954	1,994
Derivatives (trading and other assets)	0	0
Fair value liability derivatives	$52	$44

Derivatives_Balance_Sheet_Offs

Derivatives, Balance Sheet Offsetting of Assets and Liabilities (Details) (USD $)	3 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Derivative Assets
Gross amounts recognized	$109,836	$88,474
Gross amounts offset in consolidated balance sheet	-88,129	-65,869
Net amounts in consolidated balance sheet	21,707	22,605
Gross amounts not offset in consolidated balance sheet	-1,340	-1,332
Net amounts	20,367	21,273
Derivative Liabilities
Gross amounts recognized	105,202	83,781
Gross amounts offset in consolidated balance sheet	-86,777	-65,043
Net amounts in consolidated balance sheet	18,425	18,738
Gross amounts not offset in consolidated balance sheet	-4,483	-5,248
Net amounts	13,942	13,490
Interest rate contract [Member]
Derivative Assets
Gross amounts recognized	83,194	63,698
Gross amounts offset in consolidated balance sheet	-77,500	-56,051
Net amounts in consolidated balance sheet	5,694	7,647
Gross amounts not offset in consolidated balance sheet	-877	-769
Net amounts	4,817	6,878
Percent exchanged in the over the counter market	35.00%	45.00%
Derivative Liabilities
Gross amounts recognized	78,183	60,059
Gross amounts offset in consolidated balance sheet	-73,377	-54,394
Net amounts in consolidated balance sheet	4,806	5,665
Gross amounts not offset in consolidated balance sheet	-3,593	-4,244
Net amounts	1,213	1,421
Percent traded in over the counter market	31.00%	44.00%
Commodity contract [Member]
Derivative Assets
Gross amounts recognized	6,879	7,461
Gross amounts offset in consolidated balance sheet	-1,308	-1,233
Net amounts in consolidated balance sheet	5,571	6,228
Gross amounts not offset in consolidated balance sheet	-1	-72
Net amounts	5,570	6,156
Percent exchanged in the over the counter market	29.00%	27.00%
Derivative Liabilities
Gross amounts recognized	7,523	7,702
Gross amounts offset in consolidated balance sheet	-1,411	-1,459
Net amounts in consolidated balance sheet	6,112	6,243
Gross amounts not offset in consolidated balance sheet	-189	-33
Net amounts	5,923	6,210
Percent traded in over the counter market	83.00%	81.00%
Equity contract [Member]
Derivative Assets
Gross amounts recognized	9,130	9,005
Gross amounts offset in consolidated balance sheet	-2,992	-2,842
Net amounts in consolidated balance sheet	6,138	6,163
Gross amounts not offset in consolidated balance sheet	-447	-405
Net amounts	5,691	5,758
Percent exchanged in the over the counter market	54.00%	54.00%
Derivative Liabilities
Gross amounts recognized	6,783	7,038
Gross amounts offset in consolidated balance sheet	-2,511	-2,845
Net amounts in consolidated balance sheet	4,272	4,193
Gross amounts not offset in consolidated balance sheet	-334	-484
Net amounts	3,938	3,709
Percent traded in over the counter market	84.00%	82.00%
Foreign exchange contract [Member]
Derivative Assets
Gross amounts recognized	9,751	7,404
Gross amounts offset in consolidated balance sheet	-5,586	-4,923
Net amounts in consolidated balance sheet	4,165	2,481
Gross amounts not offset in consolidated balance sheet	-13	-85
Net amounts	4,152	2,396
Percent exchanged in the over the counter market	98.00%	98.00%
Derivative Liabilities
Gross amounts recognized	11,616	7,827
Gross amounts offset in consolidated balance sheet	-8,530	-5,511
Net amounts in consolidated balance sheet	3,086	2,316
Gross amounts not offset in consolidated balance sheet	-273	-270
Net amounts	2,813	2,046
Percent traded in over the counter market	100.00%	100.00%
Credit Contracts Protection Sold [Member]
Derivative Assets
Gross amounts recognized	172	151
Gross amounts offset in consolidated balance sheet	-117	-131
Net amounts in consolidated balance sheet	55	20
Gross amounts not offset in consolidated balance sheet	0	0
Net amounts	55	20
Percent exchanged in the over the counter market	71.00%	90.00%
Derivative Liabilities
Gross amounts recognized	851	943
Gross amounts offset in consolidated balance sheet	-826	-713
Net amounts in consolidated balance sheet	25	230
Gross amounts not offset in consolidated balance sheet	-22	-199
Net amounts	3	31
Percent traded in over the counter market	100.00%	100.00%
Credit Contracts Protection Purchased [Member]
Derivative Assets
Gross amounts recognized	710	755
Gross amounts offset in consolidated balance sheet	-626	-689
Net amounts in consolidated balance sheet	84	66
Gross amounts not offset in consolidated balance sheet	-2	-1
Net amounts	82	65
Percent exchanged in the over the counter market	100.00%	100.00%
Derivative Liabilities
Gross amounts recognized	194	168
Gross amounts offset in consolidated balance sheet	-122	-121
Net amounts in consolidated balance sheet	72	47
Gross amounts not offset in consolidated balance sheet	-72	-18
Net amounts	0	29
Percent traded in over the counter market	65.00%	86.00%
Other contract [Member]
Derivative Liabilities
Gross amounts recognized	52	44
Gross amounts offset in consolidated balance sheet	0	0
Net amounts in consolidated balance sheet	52	44
Gross amounts not offset in consolidated balance sheet	0	0
Net amounts	$52	$44
Percent traded in over the counter market	100.00%	100.00%

Derivatives_Net_Gains_Losses_i

Derivatives, Net Gains (Losses) in Income related to Fair Value Hedges (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Net Gains Losses Recognized In Income Statement Related To Derivatives In Fair Value Hedging Relationships [Abstract]
Net interest income (expense) recognized on derivatives	$345	$341
Gains (losses) recorded in noninterest income
Recognized on derivatives	-1,028	528
Recognized on hedged item	1,201	-408
Net recognized on fair value hedges (ineffective portion)	173	120
Available-for-sale securities [Member] | Interest rate contract [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives In Fair Value Hedging Relationships [Abstract]
Net interest income (expense) recognized on derivatives	-186	-175
Gains (losses) recorded in noninterest income
Recognized on derivatives	-666	-505
Recognized on hedged item	661	497
Net recognized on fair value hedges (ineffective portion)	-5	-8
Available-for-sale securities [Member] | Foreign exchange contract [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives In Fair Value Hedging Relationships [Abstract]
Net interest income (expense) recognized on derivatives	1	-2
Gains (losses) recorded in noninterest income
Recognized on derivatives	280	-14
Recognized on hedged item	-269	11
Net recognized on fair value hedges (ineffective portion)	11	-3
Mortgages held for sale [Member] | Interest rate contract [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives In Fair Value Hedging Relationships [Abstract]
Net interest income (expense) recognized on derivatives	-3	-3
Gains (losses) recorded in noninterest income
Recognized on derivatives	-13	-15
Recognized on hedged item	10	11
Net recognized on fair value hedges (ineffective portion)	-3	-4
Long-term debt [Member] | Interest rate contract [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives In Fair Value Hedging Relationships [Abstract]
Net interest income (expense) recognized on derivatives	472	448
Gains (losses) recorded in noninterest income
Recognized on derivatives	1,258	988
Recognized on hedged item	-1,150	-853
Net recognized on fair value hedges (ineffective portion)	108	135
Long-term debt [Member] | Foreign exchange contract [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives In Fair Value Hedging Relationships [Abstract]
Net interest income (expense) recognized on derivatives	61	73
Gains (losses) recorded in noninterest income
Recognized on derivatives	-1,887	74
Recognized on hedged item	1,949	-74
Net recognized on fair value hedges (ineffective portion)	$62	$0

Derivatives_Net_Gains_Losses_r

Derivatives, Net Gains (Losses) related to Cash Flow Hedges (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Net Gains Losses Recognized Related to Derivatives in Cash Flow Hedging Relationships [Abstract]
Gains (losses) (pre tax) recognized in OCI on derivatives	$952	$44
Gains (pre tax) reclassified from cumulative OCI into net income	234	106
Gains (losses) (pre tax) recognized in noninterest income for hedge ineffectiveness.	$1	$0

Derivatives_Net_Gains_Losses_i1

Derivatives, Net Gains (Losses) in Income related to Derivatives Not Designated as Hedging Instruments (Details) (Not Designated as Hedging Instrument [Member], USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	$1,819	$589
Economic Hedges [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	1,211	452
Economic Hedges [Member] | Interest Rate Contracts, Mortgage Banking [ Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	647	366
Economic Hedges [Member] | Interest Rate Contracts, Other
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	-64	-59
Economic Hedges [Member] | Equity contract [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	-20	76
Economic Hedges [Member] | Foreign exchange contract [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	648	69
Customer Accommodation, Trading, And Other Derivatives [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	608	137
Customer Accommodation, Trading, And Other Derivatives [Member] | Interest Rate Contracts, Mortgage Banking [ Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	387	290
Customer Accommodation, Trading, And Other Derivatives [Member] | Interest Rate Contracts, Other
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	-93	-391
Customer Accommodation, Trading, And Other Derivatives [Member] | Commodity contract [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	31	50
Customer Accommodation, Trading, And Other Derivatives [Member] | Equity contract [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	189	-94
Customer Accommodation, Trading, And Other Derivatives [Member] | Foreign exchange contract [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	110	262
Customer Accommodation, Trading, And Other Derivatives [Member] | Credit contract [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	-8	27
Customer Accommodation, Trading, And Other Derivatives [Member] | Other contract [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	($8)	($7)

Derivatives_Sold_and_Purchased

Derivatives, Sold and Purchased Credit Derivatives (Details) (USD $)	3 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Details of Sold and Purchased Credit Derivatives [Abstract]
Fair value liability	851	943
Notional amount Protection sold	13,207	12,304
Notional amount Protection purchased with identical underlyings	7,883	6,888
Notional Net protection sold	5,324	5,416
Notional Other protection purchased	10,053	9,771
Non-investment grade [Member]
Details of Sold and Purchased Credit Derivatives [Abstract]
Notional amount Protection sold	5,823	6,207
Corporate bonds [Member]
Details of Sold and Purchased Credit Derivatives [Abstract]
Fair value liability	15	23
Notional amount Protection sold	5,978	6,344
Notional amount Protection purchased with identical underlyings	4,457	4,894
Notional Net protection sold	1,521	1,450
Notional Other protection purchased	2,622	2,831
Corporate bonds [Member] | Minimum [Member]
Details of Sold and Purchased Credit Derivatives [Abstract]
Derivative range of maturity dates	1-Jan-15	1-Jan-15
Corporate bonds [Member] | Maximum [Member]
Details of Sold and Purchased Credit Derivatives [Abstract]
Derivative range of maturity dates	31-Dec-21	31-Dec-21
Corporate bonds [Member] | Non-investment grade [Member]
Details of Sold and Purchased Credit Derivatives [Abstract]
Notional amount Protection sold	2,269	2,904
Structured products [Member]
Details of Sold and Purchased Credit Derivatives [Abstract]
Fair value liability	586	654
Notional amount Protection sold	971	1,055
Notional amount Protection purchased with identical underlyings	572	608
Notional Net protection sold	399	447
Notional Other protection purchased	236	277
Structured products [Member] | Minimum [Member]
Details of Sold and Purchased Credit Derivatives [Abstract]
Derivative range of maturity dates	1-Jan-17	1-Jan-17
Structured products [Member] | Maximum [Member]
Details of Sold and Purchased Credit Derivatives [Abstract]
Derivative range of maturity dates	31-Dec-52	31-Dec-52
Structured products [Member] | Non-investment grade [Member]
Details of Sold and Purchased Credit Derivatives [Abstract]
Notional amount Protection sold	790	874
Credit default swap [Member]
Details of Sold and Purchased Credit Derivatives [Abstract]
Fair value liability	0	0
Notional amount Protection sold	2,906	1,659
Notional amount Protection purchased with identical underlyings	2,106	777
Notional Net protection sold	800	882
Notional Other protection purchased	1,286	1,042
Credit default swap [Member] | Minimum [Member]
Details of Sold and Purchased Credit Derivatives [Abstract]
Derivative range of maturity dates	1-Jan-15	1-Jan-15
Credit default swap [Member] | Maximum [Member]
Details of Sold and Purchased Credit Derivatives [Abstract]
Derivative range of maturity dates	31-Dec-20	31-Dec-19
Credit default swap [Member] | Non-investment grade [Member]
Details of Sold and Purchased Credit Derivatives [Abstract]
Notional amount Protection sold	427	292
Commercial Mortgage Backed Securities [Member]
Details of Sold and Purchased Credit Derivatives [Abstract]
Fair value liability	230	246
Notional amount Protection sold	965	1,058
Notional amount Protection purchased with identical underlyings	747	608
Notional Net protection sold	218	450
Notional Other protection purchased	384	355
Commercial Mortgage Backed Securities [Member] | Minimum [Member]
Details of Sold and Purchased Credit Derivatives [Abstract]
Derivative range of maturity dates	1-Jan-47	1-Jan-47
Commercial Mortgage Backed Securities [Member] | Maximum [Member]
Details of Sold and Purchased Credit Derivatives [Abstract]
Derivative range of maturity dates	31-Dec-52	31-Dec-63
Commercial Mortgage Backed Securities [Member] | Non-investment grade [Member]
Details of Sold and Purchased Credit Derivatives [Abstract]
Notional amount Protection sold	0	0
Asset-backed securities [Member]
Details of Sold and Purchased Credit Derivatives [Abstract]
Fair value liability	19	19
Notional amount Protection sold	51	52
Notional amount Protection purchased with identical underlyings	1	1
Notional Net protection sold	50	51
Notional Other protection purchased	78	81
Asset-backed securities [Member] | Minimum [Member]
Details of Sold and Purchased Credit Derivatives [Abstract]
Derivative range of maturity dates	1-Jan-45	1-Jan-45
Asset-backed securities [Member] | Maximum [Member]
Details of Sold and Purchased Credit Derivatives [Abstract]
Derivative range of maturity dates	31-Dec-46	31-Dec-46
Asset-backed securities [Member] | Non-investment grade [Member]
Details of Sold and Purchased Credit Derivatives [Abstract]
Notional amount Protection sold	1	1
Other Credit Derivatives [Member]
Details of Sold and Purchased Credit Derivatives [Abstract]
Fair value liability	1	1
Notional amount Protection sold	2,336	2,136
Notional amount Protection purchased with identical underlyings	0	0
Notional Net protection sold	2,336	2,136
Notional Other protection purchased	5,447	5,185
Other Credit Derivatives [Member] | Minimum [Member]
Details of Sold and Purchased Credit Derivatives [Abstract]
Derivative range of maturity dates	1-Jan-15	1-Jan-15
Other Credit Derivatives [Member] | Maximum [Member]
Details of Sold and Purchased Credit Derivatives [Abstract]
Derivative range of maturity dates	31-Dec-25	31-Dec-25
Other Credit Derivatives [Member] | Non-investment grade [Member]
Details of Sold and Purchased Credit Derivatives [Abstract]
Notional amount Protection sold	2,336	2,136

Fair_Values_of_Assets_and_Liab2

Fair Values of Assets and Liabilities Textuals (Details) (USD $)	3 Months Ended			12 Months Ended
	Mar. 31, 2015		Mar. 31, 2014	Dec. 31, 2014
Fair Values of Assets and Liabilities (Textual) [Abstract]
Net unrealized gains (losses) on trading securities	($430,000,000)		($3,000,000)	$211,000,000
Available-for-sale, at fair value	257,603,000,000			257,442,000,000
Mortgages held for sale	19,015,000,000			15,565,000,000
FV of NMEI in private equity funds where nonrecurring FV adjustments were recorded	172,000,000			171,000,000
Fair Value of cost method NMEI using NAV	1,300,000,000			1,300,000,000
Fair Value of NMEI using NAV	75,000,000			108,000,000
Loans	861,231,000,000	[1]		862,551,000,000	[1]
Capital lease obligation	9,000,000			9,000,000
Estimated fair value [Member]
Fair Values of Assets and Liabilities (Textual) [Abstract]
Loans	844,603,000,000			844,838,000,000
Loan commitments, standby letters of credit and similar letters of credit	940,000,000			945,000,000
Private Equity Funds [Member]
Fair Values of Assets and Liabilities (Textual) [Abstract]
Alternative Investment, Distributions From Underlying Assets, Distribution Period	6 years
Venture Capital Funds [Member]
Fair Values of Assets and Liabilities (Textual) [Abstract]
Investment Fund Liquidation Period	5 years
Offshore Funds [Member]
Fair Values of Assets and Liabilities (Textual) [Abstract]
Redemption restriction for investment	24,000,000			24,000,000
Fair Value, Measurements, Recurring [Member]
Fair Values of Assets and Liabilities (Textual) [Abstract]
Available-for-sale, at fair value	257,603,000,000			257,442,000,000
Total assets recorded at fair value	380,634,000,000			378,099,000,000
Total liabilities recorded at fair value	38,241,000,000			34,866,000,000
Mortgages held for sale	19,015,000,000			15,565,000,000
Fair Value, Inputs, Level 3 [Member] | Estimated fair value [Member]
Fair Values of Assets and Liabilities (Textual) [Abstract]
Loans	784,517,000,000			784,786,000,000
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Values of Assets and Liabilities (Textual) [Abstract]
Available-for-sale, at fair value	5,544,000,000			6,029,000,000
Total assets recorded at fair value	30,423,000,000			32,324,000,000
Total liabilities recorded at fair value	2,109,000,000			2,270,000,000
Mortgages held for sale	2,098,000,000			2,313,000,000
Lease Financing [Member]
Fair Values of Assets and Liabilities (Textual) [Abstract]
Loans	12,382,000,000			12,307,000,000
Residential [Member] | Government Insured Or Guaranteed [Member]
Fair Values of Assets and Liabilities (Textual) [Abstract]
Mortgages held for sale	926,000,000			1,000,000,000
Residential [Member] | Non Government Insured Or Guaranteed [Member]
Fair Values of Assets and Liabilities (Textual) [Abstract]
Mortgages held for sale	60,000,000			78,000,000
Maximum [Member] | Non modified loans [Member]
Fair Values of Assets and Liabilities (Textual) [Abstract]
Cost to service per loan	302			270
Minimum [Member] | Non modified loans [Member]
Fair Values of Assets and Liabilities (Textual) [Abstract]
Cost to service per loan	86			86
Collateralized debt obligations [Member]
Fair Values of Assets and Liabilities (Textual) [Abstract]
Available-for-sale, at fair value	487,000,000			500,000,000
Trading and available for sale securities	$487,000,000			$500,000,000
[1]	Parenthetical amounts represent assets and liabilities for which we have elected the fair value option.

Fair_Value_Measurements_From_B

Fair Value, Measurements From Brokers or Third Party Pricing Services (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Millions, unless otherwise specified
Financial assets
Available-for-sale, at fair value	$257,603	$257,442
Derivatives (trading and other assets)	109,836	88,474
Financial liabilities
Derivatives (liabilities)	-105,202	-83,781
Brokers [Member] | Fair Value, Inputs, Level 1 [Member]
Financial assets
Trading assets (excluding derivatives)	0	0
Available-for-sale, at fair value	0	0
Derivatives (trading and other assets)	0	0
Financial liabilities
Derivatives (liabilities)	0	0
Other liabilities	0	0
Brokers [Member] | Fair Value, Inputs, Level 1 [Member] | Debt Securities [Member]
Financial assets
Available-for-sale, at fair value	0	0
Brokers [Member] | Fair Value, Inputs, Level 1 [Member] | US Treasury And Government [Member]
Financial assets
Available-for-sale, at fair value	0	0
Brokers [Member] | Fair Value, Inputs, Level 1 [Member] | Securities of U.S. states and political subdivisions [Member]
Financial assets
Available-for-sale, at fair value	0	0
Brokers [Member] | Fair Value, Inputs, Level 1 [Member] | Mortgage-Backed Securities [Member]
Financial assets
Available-for-sale, at fair value	0	0
Brokers [Member] | Fair Value, Inputs, Level 1 [Member] | Other debt securities
Financial assets
Available-for-sale, at fair value	0	0
Brokers [Member] | Fair Value, Inputs, Level 1 [Member] | Equity Securities [Member]
Financial assets
Available-for-sale, at fair value	0	0
Brokers [Member] | Fair Value, Inputs, Level 2 [Member]
Financial assets
Trading assets (excluding derivatives)	0	0
Available-for-sale, at fair value	1,216	1,187
Derivatives (trading and other assets)	0	1
Financial liabilities
Derivatives (liabilities)	0	-1
Other liabilities	0	0
Brokers [Member] | Fair Value, Inputs, Level 2 [Member] | Debt Securities [Member]
Financial assets
Available-for-sale, at fair value	1,216	1,187
Brokers [Member] | Fair Value, Inputs, Level 2 [Member] | US Treasury And Government [Member]
Financial assets
Available-for-sale, at fair value	0	0
Brokers [Member] | Fair Value, Inputs, Level 2 [Member] | Securities of U.S. states and political subdivisions [Member]
Financial assets
Available-for-sale, at fair value	27	0
Brokers [Member] | Fair Value, Inputs, Level 2 [Member] | Mortgage-Backed Securities [Member]
Financial assets
Available-for-sale, at fair value	187	152
Brokers [Member] | Fair Value, Inputs, Level 2 [Member] | Other debt securities
Financial assets
Available-for-sale, at fair value	1,002	1,035
Brokers [Member] | Fair Value, Inputs, Level 2 [Member] | Equity Securities [Member]
Financial assets
Available-for-sale, at fair value	0	0
Brokers [Member] | Fair Value, Inputs, Level 3 [Member]
Financial assets
Trading assets (excluding derivatives)	0	0
Available-for-sale, at fair value	626	601
Derivatives (trading and other assets)	0	0
Financial liabilities
Derivatives (liabilities)	0	0
Other liabilities	0	0
Brokers [Member] | Fair Value, Inputs, Level 3 [Member] | Debt Securities [Member]
Financial assets
Available-for-sale, at fair value	626	601
Brokers [Member] | Fair Value, Inputs, Level 3 [Member] | US Treasury And Government [Member]
Financial assets
Available-for-sale, at fair value	0	0
Brokers [Member] | Fair Value, Inputs, Level 3 [Member] | Securities of U.S. states and political subdivisions [Member]
Financial assets
Available-for-sale, at fair value	0	0
Brokers [Member] | Fair Value, Inputs, Level 3 [Member] | Mortgage-Backed Securities [Member]
Financial assets
Available-for-sale, at fair value	0	0
Brokers [Member] | Fair Value, Inputs, Level 3 [Member] | Other debt securities
Financial assets
Available-for-sale, at fair value	626	601
Brokers [Member] | Fair Value, Inputs, Level 3 [Member] | Equity Securities [Member]
Financial assets
Available-for-sale, at fair value	0	0
Third party pricing services [Member] | Fair Value, Inputs, Level 1 [Member]
Financial assets
Trading assets (excluding derivatives)	0	2
Available-for-sale, at fair value	24,023	19,899
Derivatives (trading and other assets)	0	0
Financial liabilities
Derivatives (liabilities)	0	0
Other liabilities	0	0
Third party pricing services [Member] | Fair Value, Inputs, Level 1 [Member] | Debt Securities [Member]
Financial assets
Available-for-sale, at fair value	24,023	19,899
Third party pricing services [Member] | Fair Value, Inputs, Level 1 [Member] | US Treasury And Government [Member]
Financial assets
Available-for-sale, at fair value	24,023	19,899
Third party pricing services [Member] | Fair Value, Inputs, Level 1 [Member] | Securities of U.S. states and political subdivisions [Member]
Financial assets
Available-for-sale, at fair value	0	0
Third party pricing services [Member] | Fair Value, Inputs, Level 1 [Member] | Mortgage-Backed Securities [Member]
Financial assets
Available-for-sale, at fair value	0	0
Third party pricing services [Member] | Fair Value, Inputs, Level 1 [Member] | Other debt securities
Financial assets
Available-for-sale, at fair value	0	0
Third party pricing services [Member] | Fair Value, Inputs, Level 1 [Member] | Equity Securities [Member]
Financial assets
Available-for-sale, at fair value	0	0
Third party pricing services [Member] | Fair Value, Inputs, Level 2 [Member]
Financial assets
Trading assets (excluding derivatives)	68	105
Available-for-sale, at fair value	223,219	227,070
Derivatives (trading and other assets)	286	290
Financial liabilities
Derivatives (liabilities)	-281	-292
Other liabilities	0	-1
Third party pricing services [Member] | Fair Value, Inputs, Level 2 [Member] | Debt Securities [Member]
Financial assets
Available-for-sale, at fair value	222,649	226,501
Third party pricing services [Member] | Fair Value, Inputs, Level 2 [Member] | US Treasury And Government [Member]
Financial assets
Available-for-sale, at fair value	6,008	5,905
Third party pricing services [Member] | Fair Value, Inputs, Level 2 [Member] | Securities of U.S. states and political subdivisions [Member]
Financial assets
Available-for-sale, at fair value	45,359	42,666
Third party pricing services [Member] | Fair Value, Inputs, Level 2 [Member] | Mortgage-Backed Securities [Member]
Financial assets
Available-for-sale, at fair value	127,606	135,997
Third party pricing services [Member] | Fair Value, Inputs, Level 2 [Member] | Other debt securities
Financial assets
Available-for-sale, at fair value	43,676	41,933
Third party pricing services [Member] | Fair Value, Inputs, Level 2 [Member] | Equity Securities [Member]
Financial assets
Available-for-sale, at fair value	570	569
Third party pricing services [Member] | Fair Value, Inputs, Level 3 [Member]
Financial assets
Trading assets (excluding derivatives)	0	0
Available-for-sale, at fair value	683	735
Derivatives (trading and other assets)	0	0
Financial liabilities
Derivatives (liabilities)	0	0
Other liabilities	0	0
Third party pricing services [Member] | Fair Value, Inputs, Level 3 [Member] | Debt Securities [Member]
Financial assets
Available-for-sale, at fair value	683	735
Third party pricing services [Member] | Fair Value, Inputs, Level 3 [Member] | US Treasury And Government [Member]
Financial assets
Available-for-sale, at fair value	0	0
Third party pricing services [Member] | Fair Value, Inputs, Level 3 [Member] | Securities of U.S. states and political subdivisions [Member]
Financial assets
Available-for-sale, at fair value	59	61
Third party pricing services [Member] | Fair Value, Inputs, Level 3 [Member] | Mortgage-Backed Securities [Member]
Financial assets
Available-for-sale, at fair value	104	133
Third party pricing services [Member] | Fair Value, Inputs, Level 3 [Member] | Other debt securities
Financial assets
Available-for-sale, at fair value	520	541
Third party pricing services [Member] | Fair Value, Inputs, Level 3 [Member] | Equity Securities [Member]
Financial assets
Available-for-sale, at fair value	$0	$0

Fair_Value_Assets_and_Liabilit

Fair Value, Assets and Liabilities Recorded at Fair Value on a Recurring Basis (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Millions, unless otherwise specified
Assets:
Available-for-sale, at fair value	$257,603	$257,442
Mortgages held for sale	19,015	15,565
Loans held for sale	1	1
Loans	5,730	5,788
Mortgage servicing rights	11,739	12,738
Derivatives (trading and other assets)	109,836	88,474
Fair value asset derivatives, net	21,707	22,605
Other assets, carried at fair value	2,549	2,512
Liabilities:
Total derivative liabilities	-105,202	-83,781
Fair value liability derivatives, net	-18,425	-18,738
Interest rate contract [Member]
Assets:
Derivatives (trading and other assets)	83,194	63,698
Fair value asset derivatives, net	5,694	7,647
Liabilities:
Total derivative liabilities	-78,183	-60,059
Fair value liability derivatives, net	-4,806	-5,665
Commodity contract [Member]
Assets:
Derivatives (trading and other assets)	6,879	7,461
Fair value asset derivatives, net	5,571	6,228
Liabilities:
Total derivative liabilities	-7,523	-7,702
Fair value liability derivatives, net	-6,112	-6,243
Equity contract [Member]
Assets:
Derivatives (trading and other assets)	9,130	9,005
Fair value asset derivatives, net	6,138	6,163
Liabilities:
Total derivative liabilities	-6,783	-7,038
Fair value liability derivatives, net	-4,272	-4,193
Foreign exchange contract [Member]
Assets:
Derivatives (trading and other assets)	9,751	7,404
Fair value asset derivatives, net	4,165	2,481
Liabilities:
Total derivative liabilities	-11,616	-7,827
Fair value liability derivatives, net	-3,086	-2,316
Other contract [Member]
Liabilities:
Total derivative liabilities	-52	-44
Fair value liability derivatives, net	-52	-44
Fair Value, Measurements, Recurring [Member]
Assets:
Trading assets (excluding derivatives)	61,030	59,914
Total trading assets (excluding derivatives)	62,211	61,367
Available-for-sale, at fair value	257,603	257,442
Mortgages held for sale	19,015	15,565
Loans held for sale	1	1
Loans	5,730	5,788
Mortgage servicing rights	11,739	12,738
Fair value asset derivatives, netting	-88,129	-65,869
Fair value asset derivatives, net	21,707	22,605
Other assets, carried at fair value	2,628	2,593
Total assets recorded at fair value	380,634	378,099
Liabilities:
Fair value liability derivatives, netting	86,777	65,043
Fair value liability derivatives, net	-18,425	-18,738
Total short sale liabilities	-19,789	-16,100
Other liabilities	-27	-28
Total liabilities recorded at fair value	-38,241	-34,866
Fair Value, Measurements, Recurring [Member] | Interest rate contract [Member]
Assets:
Derivatives (trading and other assets)	83,194	63,698
Liabilities:
Total derivative liabilities	-78,183	-60,059
Fair Value, Measurements, Recurring [Member] | Commodity contract [Member]
Assets:
Derivatives (trading and other assets)	6,879	7,461
Liabilities:
Total derivative liabilities	-7,523	-7,702
Fair Value, Measurements, Recurring [Member] | Equity contract [Member]
Assets:
Derivatives (trading and other assets)	9,130	9,005
Liabilities:
Total derivative liabilities	-6,783	-7,038
Fair Value, Measurements, Recurring [Member] | Foreign exchange contract [Member]
Assets:
Derivatives (trading and other assets)	9,751	7,404
Liabilities:
Total derivative liabilities	-11,616	-7,827
Fair Value, Measurements, Recurring [Member] | Credit contract [Member]
Assets:
Derivatives (trading and other assets)	882	906
Liabilities:
Total derivative liabilities	-1,045	-1,111
Fair Value, Measurements, Recurring [Member] | Other contract [Member]
Liabilities:
Total derivative liabilities	-52	-44
Fair Value, Measurements, Recurring [Member] | Debt Securities [Member]
Assets:
Available-for-sale, at fair value	254,099	253,766
Fair Value, Measurements, Recurring [Member] | US Treasury And Government [Member]
Assets:
Trading assets (excluding derivatives)	14,591	14,392
Available-for-sale, at fair value	30,031	25,804
Liabilities:
Total short sale liabilities	-12,409	-8,679
Fair Value, Measurements, Recurring [Member] | Securities of U.S. states and political subdivisions [Member]
Assets:
Trading assets (excluding derivatives)	3,040	1,544
Available-for-sale, at fair value	47,380	44,944
Liabilities:
Total short sale liabilities	-18	-26
Fair Value, Measurements, Recurring [Member] | Collateralized loan and other debt obligations [Member]
Assets:
Trading assets (excluding derivatives)	669	719
Available-for-sale, at fair value	27,722	25,361
Fair Value, Measurements, Recurring [Member] | Corporate debt securities [Member]
Assets:
Trading assets (excluding derivatives)	8,486	7,571
Available-for-sale, at fair value	15,133	14,786
Liabilities:
Total short sale liabilities	-4,552	-5,055
Fair Value, Measurements, Recurring [Member] | Mortgage-Backed Securities [Member]
Assets:
Trading assets (excluding derivatives)	19,575	16,273
Available-for-sale, at fair value	127,929	136,352
Fair Value, Measurements, Recurring [Member] | Mortgage Backed Securities, Issued By US Government Sponsored Enterprises [Member]
Assets:
Available-for-sale, at fair value	103,217	110,089
Fair Value, Measurements, Recurring [Member] | Residential [Member]
Assets:
Available-for-sale, at fair value	8,723	9,269
Fair Value, Measurements, Recurring [Member] | Commercial [Member]
Assets:
Available-for-sale, at fair value	15,989	16,994
Fair Value, Measurements, Recurring [Member] | Asset-backed securities [Member]
Assets:
Trading assets (excluding derivatives)	861	855
Available-for-sale, at fair value	5,882	6,499
Fair Value, Measurements, Recurring [Member] | Auto loans and leases [Member]
Assets:
Available-for-sale, at fair value	282	276
Fair Value, Measurements, Recurring [Member] | Home equity loans [Member]
Assets:
Available-for-sale, at fair value	567	662
Fair Value, Measurements, Recurring [Member] | Other asset-backed securities [Member]
Assets:
Available-for-sale, at fair value	5,033	5,561
Fair Value, Measurements, Recurring [Member] | Other trading assets [Member]
Assets:
Other trading assets	1,181	1,453
Fair Value, Measurements, Recurring [Member] | Other debt securities
Assets:
Available-for-sale, at fair value	22	20
Fair Value, Measurements, Recurring [Member] | Other short sale liabilities [Member]
Liabilities:
Total short sale liabilities	-331	-79
Fair Value, Measurements, Recurring [Member] | Equity Securities [Member]
Assets:
Trading assets (excluding derivatives)	13,808	18,560
Available-for-sale, at fair value	3,504	3,676
Liabilities:
Total short sale liabilities	-2,479	-2,261
Fair Value, Measurements, Recurring [Member] | Perpetual preferred securities [Member]
Assets:
Available-for-sale, at fair value	1,692	1,700
Fair Value, Measurements, Recurring [Member] | Other marketable equity securities [Member]
Assets:
Available-for-sale, at fair value	1,812	1,976
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Assets:
Trading assets (excluding derivatives)	23,837	29,018
Total trading assets (excluding derivatives)	23,837	29,018
Available-for-sale, at fair value	26,376	22,402
Mortgages held for sale	0	0
Loans held for sale	0	0
Loans	0	0
Mortgage servicing rights	0	0
Fair value asset derivatives, netting	0	0
Fair value asset derivatives, net	4,371	4,194
Other assets, carried at fair value	0	0
Total assets recorded at fair value	54,584	55,614
Liabilities:
Fair value liability derivatives, netting	0	0
Fair value liability derivatives, net	-1,136	-1,379
Total short sale liabilities	-13,508	-9,302
Other liabilities	0	0
Total liabilities recorded at fair value	-14,644	-10,681
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Interest rate contract [Member]
Assets:
Derivatives (trading and other assets)	83	27
Liabilities:
Total derivative liabilities	-30	-29
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Commodity contract [Member]
Assets:
Derivatives (trading and other assets)	0	0
Liabilities:
Total derivative liabilities	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Equity contract [Member]
Assets:
Derivatives (trading and other assets)	4,234	4,102
Liabilities:
Total derivative liabilities	-1,054	-1,290
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Foreign exchange contract [Member]
Assets:
Derivatives (trading and other assets)	54	65
Liabilities:
Total derivative liabilities	-52	-60
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Credit contract [Member]
Assets:
Derivatives (trading and other assets)	0	0
Liabilities:
Total derivative liabilities	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Other contract [Member]
Liabilities:
Total derivative liabilities	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Debt Securities [Member]
Assets:
Available-for-sale, at fair value	24,106	19,982
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | US Treasury And Government [Member]
Assets:
Trading assets (excluding derivatives)	10,161	10,506
Available-for-sale, at fair value	24,023	19,899
Liabilities:
Total short sale liabilities	-11,032	-7,043
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Securities of U.S. states and political subdivisions [Member]
Assets:
Trading assets (excluding derivatives)	0	0
Available-for-sale, at fair value	0	0
Liabilities:
Total short sale liabilities	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Collateralized loan and other debt obligations [Member]
Assets:
Trading assets (excluding derivatives)	0	0
Available-for-sale, at fair value	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Corporate debt securities [Member]
Assets:
Trading assets (excluding derivatives)	0	0
Available-for-sale, at fair value	83	83
Liabilities:
Total short sale liabilities	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Mortgage-Backed Securities [Member]
Assets:
Trading assets (excluding derivatives)	0	0
Available-for-sale, at fair value	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Mortgage Backed Securities, Issued By US Government Sponsored Enterprises [Member]
Assets:
Available-for-sale, at fair value	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Residential [Member]
Assets:
Available-for-sale, at fair value	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Commercial [Member]
Assets:
Available-for-sale, at fair value	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Asset-backed securities [Member]
Assets:
Trading assets (excluding derivatives)	0	0
Available-for-sale, at fair value	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Auto loans and leases [Member]
Assets:
Available-for-sale, at fair value	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Home equity loans [Member]
Assets:
Available-for-sale, at fair value	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Other asset-backed securities [Member]
Assets:
Available-for-sale, at fair value	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Other trading assets [Member]
Assets:
Other trading assets	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Other debt securities
Assets:
Available-for-sale, at fair value	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Other short sale liabilities [Member]
Liabilities:
Total short sale liabilities	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Equity Securities [Member]
Assets:
Trading assets (excluding derivatives)	13,676	18,512
Available-for-sale, at fair value	2,270	2,420
Liabilities:
Total short sale liabilities	-2,476	-2,259
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Perpetual preferred securities [Member]
Assets:
Available-for-sale, at fair value	482	468
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Other marketable equity securities [Member]
Assets:
Available-for-sale, at fair value	1,788	1,952
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Assets:
Trading assets (excluding derivatives)	36,684	30,301
Total trading assets (excluding derivatives)	37,801	31,699
Available-for-sale, at fair value	225,683	229,011
Mortgages held for sale	16,917	13,252
Loans held for sale	1	1
Loans	0	0
Mortgage servicing rights	0	0
Fair value asset derivatives, netting	0	0
Fair value asset derivatives, net	103,354	82,067
Other assets, carried at fair value	0	0
Total assets recorded at fair value	383,756	356,030
Liabilities:
Fair value liability derivatives, netting	0	0
Fair value liability derivatives, net	-101,999	-80,166
Total short sale liabilities	-6,266	-6,792
Other liabilities	0	0
Total liabilities recorded at fair value	-108,265	-86,958
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Interest rate contract [Member]
Assets:
Derivatives (trading and other assets)	82,639	63,306
Liabilities:
Total derivative liabilities	-78,119	-59,958
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Commodity contract [Member]
Assets:
Derivatives (trading and other assets)	6,858	7,438
Liabilities:
Total derivative liabilities	-7,500	-7,680
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Equity contract [Member]
Assets:
Derivatives (trading and other assets)	3,711	3,544
Liabilities:
Total derivative liabilities	-4,358	-4,305
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Foreign exchange contract [Member]
Assets:
Derivatives (trading and other assets)	9,697	7,339
Liabilities:
Total derivative liabilities	-11,564	-7,767
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Credit contract [Member]
Assets:
Derivatives (trading and other assets)	449	440
Liabilities:
Total derivative liabilities	-458	-456
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Other contract [Member]
Liabilities:
Total derivative liabilities	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Debt Securities [Member]
Assets:
Available-for-sale, at fair value	225,089	228,418
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | US Treasury And Government [Member]
Assets:
Trading assets (excluding derivatives)	4,430	3,886
Available-for-sale, at fair value	6,008	5,905
Liabilities:
Total short sale liabilities	-1,377	-1,636
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Securities of U.S. states and political subdivisions [Member]
Assets:
Trading assets (excluding derivatives)	3,034	1,537
Available-for-sale, at fair value	45,400	42,667
Liabilities:
Total short sale liabilities	-18	-26
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Collateralized loan and other debt obligations [Member]
Assets:
Trading assets (excluding derivatives)	288	274
Available-for-sale, at fair value	26,669	24,274
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Corporate debt securities [Member]
Assets:
Trading assets (excluding derivatives)	8,455	7,517
Available-for-sale, at fair value	14,738	14,451
Liabilities:
Total short sale liabilities	-4,552	-5,055
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Mortgage-Backed Securities [Member]
Assets:
Trading assets (excluding derivatives)	19,575	16,273
Available-for-sale, at fair value	127,825	136,219
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Mortgage Backed Securities, Issued By US Government Sponsored Enterprises [Member]
Assets:
Available-for-sale, at fair value	103,217	110,089
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Residential [Member]
Assets:
Available-for-sale, at fair value	8,723	9,245
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Commercial [Member]
Assets:
Available-for-sale, at fair value	15,885	16,885
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Asset-backed securities [Member]
Assets:
Trading assets (excluding derivatives)	780	776
Available-for-sale, at fair value	4,427	4,882
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Auto loans and leases [Member]
Assets:
Available-for-sale, at fair value	33	31
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Home equity loans [Member]
Assets:
Available-for-sale, at fair value	567	662
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Other asset-backed securities [Member]
Assets:
Available-for-sale, at fair value	3,827	4,189
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Other trading assets [Member]
Assets:
Other trading assets	1,117	1,398
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Other debt securities
Assets:
Available-for-sale, at fair value	22	20
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Other short sale liabilities [Member]
Liabilities:
Total short sale liabilities	-316	-73
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Equity Securities [Member]
Assets:
Trading assets (excluding derivatives)	122	38
Available-for-sale, at fair value	594	593
Liabilities:
Total short sale liabilities	-3	-2
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Perpetual preferred securities [Member]
Assets:
Available-for-sale, at fair value	570	569
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Other marketable equity securities [Member]
Assets:
Available-for-sale, at fair value	24	24
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Assets:
Trading assets (excluding derivatives)	509	595
Total trading assets (excluding derivatives)	573	650
Available-for-sale, at fair value	5,544	6,029
Mortgages held for sale	2,098	2,313
Loans held for sale	0	0
Loans	5,730	5,788
Mortgage servicing rights	11,739	12,738
Fair value asset derivatives, netting	0	0
Fair value asset derivatives, net	2,111	2,213
Other assets, carried at fair value	2,628	2,593
Total assets recorded at fair value	30,423	32,324
Liabilities:
Fair value liability derivatives, netting	0	0
Fair value liability derivatives, net	-2,067	-2,236
Total short sale liabilities	-15	-6
Other liabilities	-27	-28
Total liabilities recorded at fair value	-2,109	-2,270
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Interest rate contract [Member]
Assets:
Derivatives (trading and other assets)	472	365
Liabilities:
Total derivative liabilities	-34	-72
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Commodity contract [Member]
Assets:
Derivatives (trading and other assets)	21	23
Liabilities:
Total derivative liabilities	-23	-22
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Equity contract [Member]
Assets:
Derivatives (trading and other assets)	1,185	1,359
Liabilities:
Total derivative liabilities	-1,371	-1,443
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Foreign exchange contract [Member]
Assets:
Derivatives (trading and other assets)	0	0
Liabilities:
Total derivative liabilities	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Credit contract [Member]
Assets:
Derivatives (trading and other assets)	433	466
Liabilities:
Total derivative liabilities	-587	-655
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Other contract [Member]
Liabilities:
Total derivative liabilities	-52	-44
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Debt Securities [Member]
Assets:
Available-for-sale, at fair value	4,904	5,366
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | US Treasury And Government [Member]
Assets:
Trading assets (excluding derivatives)	0	0
Available-for-sale, at fair value	0	0
Liabilities:
Total short sale liabilities	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Securities of U.S. states and political subdivisions [Member]
Assets:
Trading assets (excluding derivatives)	6	7
Available-for-sale, at fair value	1,980	2,277
Liabilities:
Total short sale liabilities	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Collateralized loan and other debt obligations [Member]
Assets:
Trading assets (excluding derivatives)	381	445
Available-for-sale, at fair value	1,053	1,087
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Corporate debt securities [Member]
Assets:
Trading assets (excluding derivatives)	31	54
Available-for-sale, at fair value	312	252
Liabilities:
Total short sale liabilities	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Mortgage-Backed Securities [Member]
Assets:
Trading assets (excluding derivatives)	0	0
Available-for-sale, at fair value	104	133
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Mortgage Backed Securities, Issued By US Government Sponsored Enterprises [Member]
Assets:
Available-for-sale, at fair value	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Residential [Member]
Assets:
Available-for-sale, at fair value	0	24
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Commercial [Member]
Assets:
Available-for-sale, at fair value	104	109
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Asset-backed securities [Member]
Assets:
Trading assets (excluding derivatives)	81	79
Available-for-sale, at fair value	1,455	1,617
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Auto loans and leases [Member]
Assets:
Available-for-sale, at fair value	249	245
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Home equity loans [Member]
Assets:
Available-for-sale, at fair value	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Other asset-backed securities [Member]
Assets:
Available-for-sale, at fair value	1,206	1,372
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Other trading assets [Member]
Assets:
Other trading assets	64	55
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Other debt securities
Assets:
Available-for-sale, at fair value	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Other short sale liabilities [Member]
Liabilities:
Total short sale liabilities	-15	-6
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Equity Securities [Member]
Assets:
Trading assets (excluding derivatives)	10	10
Available-for-sale, at fair value	640	663
Liabilities:
Total short sale liabilities	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Perpetual preferred securities [Member]
Assets:
Available-for-sale, at fair value	640	663
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Other marketable equity securities [Member]
Assets:
Available-for-sale, at fair value	$0	$0

Fair_Value_Transfers_Between_F

Fair Value, Transfers Between Fair Value Levels (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring Basis Transfers Between Fair Value Levels [Line Items]
Total	$0	$0
Trading assets (excluding derivatives) [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis Transfers Between Fair Value Levels [Line Items]
Total	0	0
Available-for-sale securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis Transfers Between Fair Value Levels [Line Items]
Total	0	0
Mortgages held for sale [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis Transfers Between Fair Value Levels [Line Items]
Total	0	0
Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis Transfers Between Fair Value Levels [Line Items]
Total	0	0
Net derivative assets and liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis Transfers Between Fair Value Levels [Line Items]
Total	0	0
Short sale liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis Transfers Between Fair Value Levels [Line Items]
Total	0	0
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis Transfers Between Fair Value Levels [Line Items]
Transfer In	14	0
Transfer Out	-2	-8
Fair Value, Inputs, Level 1 [Member] | Trading assets (excluding derivatives) [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis Transfers Between Fair Value Levels [Line Items]
Transfer In	15	0
Transfer Out	-2	0
Fair Value, Inputs, Level 1 [Member] | Available-for-sale securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis Transfers Between Fair Value Levels [Line Items]
Transfer In	0	0
Transfer Out	0	-8
Fair Value, Inputs, Level 1 [Member] | Mortgages held for sale [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis Transfers Between Fair Value Levels [Line Items]
Transfer In	0	0
Transfer Out	0	0
Fair Value, Inputs, Level 1 [Member] | Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis Transfers Between Fair Value Levels [Line Items]
Transfer In	0	0
Transfer Out	0	0
Fair Value, Inputs, Level 1 [Member] | Net derivative assets and liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis Transfers Between Fair Value Levels [Line Items]
Transfer In	0	0
Transfer Out	0	0
Fair Value, Inputs, Level 1 [Member] | Short sale liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis Transfers Between Fair Value Levels [Line Items]
Transfer In	-1	0
Transfer Out	0	0
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis Transfers Between Fair Value Levels [Line Items]
Transfer In	163	128
Transfer Out	-45	-183
Fair Value, Inputs, Level 2 [Member] | Trading assets (excluding derivatives) [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis Transfers Between Fair Value Levels [Line Items]
Transfer In	10	2
Transfer Out	-16	-28
Fair Value, Inputs, Level 2 [Member] | Available-for-sale securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis Transfers Between Fair Value Levels [Line Items]
Transfer In	52	8
Transfer Out	0	-95
Fair Value, Inputs, Level 2 [Member] | Mortgages held for sale [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis Transfers Between Fair Value Levels [Line Items]
Transfer In	67	24
Transfer Out	-42	-57
Fair Value, Inputs, Level 2 [Member] | Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis Transfers Between Fair Value Levels [Line Items]
Transfer In	0	49
Transfer Out	0	0
Fair Value, Inputs, Level 2 [Member] | Net derivative assets and liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis Transfers Between Fair Value Levels [Line Items]
Transfer In	34	45
Transfer Out	12	-3
Fair Value, Inputs, Level 2 [Member] | Short sale liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis Transfers Between Fair Value Levels [Line Items]
Transfer In	0	0
Transfer Out	1	0
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis Transfers Between Fair Value Levels [Line Items]
Transfer In	31	183
Transfer Out	-161	-120
Fair Value, Inputs, Level 3 [Member] | Trading assets (excluding derivatives) [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis Transfers Between Fair Value Levels [Line Items]
Transfer In	1	28
Transfer Out	-8	-2
Fair Value, Inputs, Level 3 [Member] | Available-for-sale securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis Transfers Between Fair Value Levels [Line Items]
Transfer In	0	95
Transfer Out	-52	0
Fair Value, Inputs, Level 3 [Member] | Mortgages held for sale [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis Transfers Between Fair Value Levels [Line Items]
Transfer In	42	57
Transfer Out	-67	-24
Fair Value, Inputs, Level 3 [Member] | Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis Transfers Between Fair Value Levels [Line Items]
Transfer In	0	0
Transfer Out	0	-49
Fair Value, Inputs, Level 3 [Member] | Net derivative assets and liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis Transfers Between Fair Value Levels [Line Items]
Transfer In	-12	3
Transfer Out	-34	-45
Fair Value, Inputs, Level 3 [Member] | Short sale liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis Transfers Between Fair Value Levels [Line Items]
Transfer In	0	0
Transfer Out	$0	$0

Fair_Value_Assets_and_Liabilit1

Fair Value, Assets and Liabilities Measured on Recurring Basis Level 3 Reconciliation (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Trading securities and trading assets, excluding derivatives [Member]
Assets:
Balance, beginning of period	$650	$823
Net gains (losses) included in net income	45	24
Net gains (losses) included in other comprehensive income	0	0
Purchases, sales, issuances and settlements, net	-115	24
Transfers into Level 3	1	28
Transfers out of Level 3	-8	-2
Balance, end of period	573	897
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	21	5
Trading assets (excluding derivatives) [Member]
Assets:
Balance, beginning of period	595	769
Net gains (losses) included in net income	39	26
Net gains (losses) included in other comprehensive income	0	0
Purchases, sales, issuances and settlements, net	-118	24
Transfers into Level 3	0	28
Transfers out of Level 3	-7	-2
Balance, end of period	509	845
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	13	4
Trading assets (excluding derivatives) [Member] | Securities of U.S. states and political subdivisions [Member]
Assets:
Balance, beginning of period	7	39
Net gains (losses) included in net income	0	0
Net gains (losses) included in other comprehensive income	0	0
Purchases, sales, issuances and settlements, net	-1	1
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
Balance, end of period	6	40
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	0	0
Trading assets (excluding derivatives) [Member] | Mortgage-Backed Securities [Member]
Assets:
Balance, beginning of period	0	1
Net gains (losses) included in net income	0	0
Net gains (losses) included in other comprehensive income	0	0
Purchases, sales, issuances and settlements, net	0	0
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
Balance, end of period	0	1
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	0	0
Trading assets (excluding derivatives) [Member] | Collateralized loan and other debt obligations [Member]
Assets:
Balance, beginning of period	445	541
Net gains (losses) included in net income	21	11
Net gains (losses) included in other comprehensive income	0	0
Purchases, sales, issuances and settlements, net	-85	52
Transfers into Level 3	0	4
Transfers out of Level 3	0	0
Balance, end of period	381	608
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	-3	-10
Trading assets (excluding derivatives) [Member] | Corporate debt securities [Member]
Assets:
Balance, beginning of period	54	53
Net gains (losses) included in net income	2	1
Net gains (losses) included in other comprehensive income	0	0
Purchases, sales, issuances and settlements, net	-18	9
Transfers into Level 3	0	24
Transfers out of Level 3	-7	-1
Balance, end of period	31	86
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	0	0
Trading assets (excluding derivatives) [Member] | Asset-backed securities [Member]
Assets:
Balance, beginning of period	79	122
Net gains (losses) included in net income	16	14
Net gains (losses) included in other comprehensive income	0	0
Purchases, sales, issuances and settlements, net	-14	-38
Transfers into Level 3	0	0
Transfers out of Level 3	0	-1
Balance, end of period	81	97
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	16	14
Trading assets (excluding derivatives) [Member] | Equity Securities [Member]
Assets:
Balance, beginning of period	10	13
Net gains (losses) included in net income	0	0
Net gains (losses) included in other comprehensive income	0	0
Purchases, sales, issuances and settlements, net	0	0
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
Balance, end of period	10	13
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	0	0
Other trading assets [Member]
Assets:
Balance, beginning of period	55	54
Net gains (losses) included in net income	6	-2
Net gains (losses) included in other comprehensive income	0	0
Purchases, sales, issuances and settlements, net	3	0
Transfers into Level 3	1	0
Transfers out of Level 3	-1	0
Balance, end of period	64	52
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	8	1
Mortgages held for sale [Member]
Assets:
Balance, beginning of period	2,313	2,374
Net gains (losses) included in net income	38	2
Net gains (losses) included in other comprehensive income	0	0
Purchases, sales, issuances and settlements, net	-228	-46
Transfers into Level 3	42	57
Transfers out of Level 3	-67	-24
Balance, end of period	2,098	2,363
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	22	2
Loans [Member]
Assets:
Balance, beginning of period	5,788	5,723
Net gains (losses) included in net income	-6	2
Net gains (losses) included in other comprehensive income	0	0
Purchases, sales, issuances and settlements, net	-52	13
Transfers into Level 3	0	0
Transfers out of Level 3	0	-49
Balance, end of period	5,730	5,689
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	-2	4
Mortgage servicing rights [Member]
Assets:
Balance, beginning of period	12,738	15,580
Net gains (losses) included in net income	-1,306	-916
Net gains (losses) included in other comprehensive income	0	0
Purchases, sales, issuances and settlements, net	307	289
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
Balance, end of period	11,739	14,953
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	-773	-441
Derivative [Member]
Assets and Liabilities:
Balance, beginning of period	-23	-465
Net gains (losses) included in net income	464	358
Total net gains (losses) included in other comprehensive income	0	0
Purchases, sales, issuances and settlements, net	-351	-133
Transfers into Level 3	-12	3
Transfers out of Level 3	-34	-45
Balance, end of period	44	-282
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	169	1
Derivative [Member] | Interest rate contract [Member]
Assets and Liabilities:
Balance, beginning of period	293	-40
Net gains (losses) included in net income	482	362
Total net gains (losses) included in other comprehensive income	0	0
Purchases, sales, issuances and settlements, net	-337	-264
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
Balance, end of period	438	58
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	214	77
Derivative [Member] | Commodity contract [Member]
Assets and Liabilities:
Balance, beginning of period	1	-10
Net gains (losses) included in net income	-1	-31
Total net gains (losses) included in other comprehensive income	0	0
Purchases, sales, issuances and settlements, net	0	1
Transfers into Level 3	-2	-3
Transfers out of Level 3	0	0
Balance, end of period	-2	-43
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	-2	-39
Derivative [Member] | Equity contract [Member]
Assets and Liabilities:
Balance, beginning of period	-84	-46
Net gains (losses) included in net income	-7	22
Total net gains (losses) included in other comprehensive income	0	0
Purchases, sales, issuances and settlements, net	-51	39
Transfers into Level 3	-10	6
Transfers out of Level 3	-34	-45
Balance, end of period	-186	-24
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	-33	-36
Derivative [Member] | Foreign exchange contract [Member]
Assets and Liabilities:
Balance, beginning of period	0	9
Net gains (losses) included in net income	0	2
Total net gains (losses) included in other comprehensive income	0	0
Purchases, sales, issuances and settlements, net	0	-5
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
Balance, end of period	0	6
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	0	-2
Derivative [Member] | Credit contract [Member]
Assets and Liabilities:
Balance, beginning of period	-189	-375
Net gains (losses) included in net income	-2	11
Total net gains (losses) included in other comprehensive income	0	0
Purchases, sales, issuances and settlements, net	37	96
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
Balance, end of period	-154	-268
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	-1	1
Derivative [Member] | Other contract [Member]
Assets and Liabilities:
Balance, beginning of period	-44	-3
Net gains (losses) included in net income	-8	-8
Total net gains (losses) included in other comprehensive income	0	0
Purchases, sales, issuances and settlements, net	0	0
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
Balance, end of period	-52	-11
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	-9	0
Other assets [Member]
Assets:
Balance, beginning of period	2,593	1,503
Net gains (losses) included in net income	38	-63
Net gains (losses) included in other comprehensive income	0	0
Purchases, sales, issuances and settlements, net	-3	600
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
Balance, end of period	2,628	2,040
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	37	-4
Short sale liabilities [Member]
Liabilities:
Balance, beginning of period	-6	0
Net gains (losses) included in net income	0	0
Net gains (losses) included in other comprehensive income	0	0
Purchases, sales, issuances and settlements, net	-9	-5
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
Balance, end of period	-15	-5
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	0	0
Other liabilities [Member]
Liabilities:
Balance, beginning of period	-28	-39
Net gains (losses) included in net income	1	0
Net gains (losses) included in other comprehensive income	0	0
Purchases, sales, issuances and settlements, net	0	2
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
Balance, end of period	-27	-37
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	0	0
Available-for-sale securities [Member]
Assets:
Balance, beginning of period	6,029	7,995
Net gains (losses) included in net income	37	71
Net gains (losses) included in other comprehensive income	-35	-7
Purchases, sales, issuances and settlements, net	-435	-894
Transfers into Level 3	0	95
Transfers out of Level 3	-52	0
Balance, end of period	5,544	7,260
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	-5	-2
Available-for-sale securities [Member] | Debt Securities [Member]
Assets:
Balance, beginning of period	5,366	7,266
Net gains (losses) included in net income	34	68
Net gains (losses) included in other comprehensive income	-33	-3
Purchases, sales, issuances and settlements, net	-411	-874
Transfers into Level 3	0	95
Transfers out of Level 3	-52	0
Balance, end of period	4,904	6,552
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	-5	-2
Available-for-sale securities [Member] | Securities of U.S. states and political subdivisions [Member]
Assets:
Balance, beginning of period	2,277	3,214
Net gains (losses) included in net income	-1	9
Net gains (losses) included in other comprehensive income	-3	2
Purchases, sales, issuances and settlements, net	-241	-132
Transfers into Level 3	0	6
Transfers out of Level 3	-52	0
Balance, end of period	1,980	3,099
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	-5	0
Available-for-sale securities [Member] | Mortgage-Backed Securities [Member]
Assets:
Balance, beginning of period	133	202
Net gains (losses) included in net income	5	11
Net gains (losses) included in other comprehensive income	-7	8
Purchases, sales, issuances and settlements, net	-27	-39
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
Balance, end of period	104	182
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	0	-2
Available-for-sale securities [Member] | Residential [Member]
Assets:
Balance, beginning of period	24	64
Net gains (losses) included in net income	4	10
Net gains (losses) included in other comprehensive income	-6	-3
Purchases, sales, issuances and settlements, net	-22	-30
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
Balance, end of period	0	41
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	0	0
Available-for-sale securities [Member] | Commercial [Member]
Assets:
Balance, beginning of period	109	138
Net gains (losses) included in net income	1	1
Net gains (losses) included in other comprehensive income	-1	11
Purchases, sales, issuances and settlements, net	-5	-9
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
Balance, end of period	104	141
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	0	-2
Available-for-sale securities [Member] | Collateralized loan and other debt obligations [Member]
Assets:
Balance, beginning of period	1,087	1,420
Net gains (losses) included in net income	29	43
Net gains (losses) included in other comprehensive income	-16	-13
Purchases, sales, issuances and settlements, net	-47	-30
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
Balance, end of period	1,053	1,420
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	0	0
Available-for-sale securities [Member] | Corporate debt securities [Member]
Assets:
Balance, beginning of period	252	281
Net gains (losses) included in net income	0	4
Net gains (losses) included in other comprehensive income	0	7
Purchases, sales, issuances and settlements, net	60	5
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
Balance, end of period	312	297
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	0	0
Available-for-sale securities [Member] | Asset-backed securities [Member]
Assets:
Balance, beginning of period	1,617	2,149
Net gains (losses) included in net income	1	1
Net gains (losses) included in other comprehensive income	-7	-7
Purchases, sales, issuances and settlements, net	-156	-678
Transfers into Level 3	0	89
Transfers out of Level 3	0	0
Balance, end of period	1,455	1,554
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	0	0
Available-for-sale securities [Member] | Auto loans and leases [Member]
Assets:
Balance, beginning of period	245	492
Net gains (losses) included in net income	0	0
Net gains (losses) included in other comprehensive income	4	-3
Purchases, sales, issuances and settlements, net	0	-215
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
Balance, end of period	249	274
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	0	0
Available-for-sale securities [Member] | Home equity loans [Member]
Assets:
Balance, beginning of period	0	0
Net gains (losses) included in net income	0	0
Net gains (losses) included in other comprehensive income	0	0
Purchases, sales, issuances and settlements, net	0	0
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
Balance, end of period	0	0
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	0	0
Available-for-sale securities [Member] | Other asset-backed securities [Member]
Assets:
Balance, beginning of period	1,372	1,657
Net gains (losses) included in net income	1	1
Net gains (losses) included in other comprehensive income	-11	-4
Purchases, sales, issuances and settlements, net	-156	-463
Transfers into Level 3	0	89
Transfers out of Level 3	0	0
Balance, end of period	1,206	1,280
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	0	0
Available-for-sale securities [Member] | Equity Securities [Member]
Assets:
Balance, beginning of period	663	729
Net gains (losses) included in net income	3	3
Net gains (losses) included in other comprehensive income	-2	-4
Purchases, sales, issuances and settlements, net	-24	-20
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
Balance, end of period	640	708
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	0	0
Available-for-sale securities [Member] | Perpetual preferred securities [Member]
Assets:
Balance, beginning of period	663	729
Net gains (losses) included in net income	3	3
Net gains (losses) included in other comprehensive income	-2	-4
Purchases, sales, issuances and settlements, net	-24	-20
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
Balance, end of period	640	708
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	$0	$0

Fair_Value_Assets_and_Liabilit2

Fair Value, Assets and Liabilities Measured on Recurring Basis Level 3 Reconciliation Breakout (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Trading securities and trading assets, excluding derivatives [Member]
Assets:
Purchases	$418	$354
Sales	-524	-318
Issuances	0	0
Settlements	-9	-12
Net	-115	24
Trading assets (excluding derivatives) [Member]
Assets:
Purchases	415	354
Sales	-524	-318
Issuances	0	0
Settlements	-9	-12
Net	-118	24
Trading assets (excluding derivatives) [Member] | Securities of U.S. states and political subdivisions [Member]
Assets:
Purchases	0	5
Sales	-1	-4
Issuances	0	0
Settlements	0	0
Net	-1	1
Trading assets (excluding derivatives) [Member] | Mortgage-Backed Securities [Member]
Assets:
Purchases	0	0
Sales	0	0
Issuances	0	0
Settlements	0	0
Net	0	0
Trading assets (excluding derivatives) [Member] | Collateralized loan and other debt obligations [Member]
Assets:
Purchases	400	324
Sales	-485	-270
Issuances	0	0
Settlements	0	-2
Net	-85	52
Trading assets (excluding derivatives) [Member] | Corporate debt securities [Member]
Assets:
Purchases	15	15
Sales	-33	-6
Issuances	0	0
Settlements	0	0
Net	-18	9
Trading assets (excluding derivatives) [Member] | Asset-backed securities [Member]
Assets:
Purchases	0	10
Sales	-5	-38
Issuances	0	0
Settlements	-9	-10
Net	-14	-38
Trading assets (excluding derivatives) [Member] | Equity Securities [Member]
Assets:
Purchases	0	0
Sales	0	0
Issuances	0	0
Settlements	0	0
Net	0	0
Other trading assets [Member]
Assets:
Purchases	3	0
Sales	0	0
Issuances	0	0
Settlements	0	0
Net	3	0
Available-for-sale securities [Member]
Assets:
Purchases	104	209
Sales	-51	-136
Issuances	114	86
Settlements	-602	-1,053
Net	-435	-894
Available-for-sale securities [Member] | Debt Securities [Member]
Assets:
Purchases	104	209
Sales	-51	-136
Issuances	114	86
Settlements	-578	-1,033
Net	-411	-874
Available-for-sale securities [Member] | Securities of U.S. states and political subdivisions [Member]
Assets:
Purchases	0	73
Sales	-20	-55
Issuances	55	11
Settlements	-276	-161
Net	-241	-132
Available-for-sale securities [Member] | Mortgage-Backed Securities [Member]
Assets:
Purchases	0	0
Sales	-27	-36
Issuances	0	0
Settlements	0	-3
Net	-27	-39
Available-for-sale securities [Member] | Residential [Member]
Assets:
Purchases	0	0
Sales	-22	-28
Issuances	0	0
Settlements	0	-2
Net	-22	-30
Available-for-sale securities [Member] | Commercial [Member]
Assets:
Purchases	0	0
Sales	-5	-8
Issuances	0	0
Settlements	0	-1
Net	-5	-9
Available-for-sale securities [Member] | Collateralized loan and other debt obligations [Member]
Assets:
Purchases	44	124
Sales	-3	-32
Issuances	0	0
Settlements	-88	-122
Net	-47	-30
Available-for-sale securities [Member] | Corporate debt securities [Member]
Assets:
Purchases	60	0
Sales	0	-1
Issuances	0	11
Settlements	0	-5
Net	60	5
Available-for-sale securities [Member] | Asset-backed securities [Member]
Assets:
Purchases	0	12
Sales	-1	-12
Issuances	59	64
Settlements	-214	-742
Net	-156	-678
Available-for-sale securities [Member] | Auto loans and leases [Member]
Assets:
Purchases	0	0
Sales	0	0
Issuances	0	0
Settlements	0	-215
Net	0	-215
Available-for-sale securities [Member] | Home equity loans [Member]
Assets:
Purchases	0	0
Sales	0	0
Issuances	0	0
Settlements	0	0
Net	0	0
Available-for-sale securities [Member] | Other asset-backed securities [Member]
Assets:
Purchases	0	12
Sales	-1	-12
Issuances	59	64
Settlements	-214	-527
Net	-156	-463
Available-for-sale securities [Member] | Equity Securities [Member]
Assets:
Purchases	0	0
Sales	0	0
Issuances	0	0
Settlements	-24	-20
Net	-24	-20
Available-for-sale securities [Member] | Perpetual preferred securities [Member]
Assets:
Purchases	0	0
Sales	0	0
Issuances	0	0
Settlements	-24	-20
Net	-24	-20
Mortgages held for sale [Member]
Assets:
Purchases	53	47
Sales	-291	-21
Issuances	120	0
Settlements	-110	-72
Net	-228	-46
Loans [Member]
Assets:
Purchases	66	1
Sales	0	0
Issuances	95	102
Settlements	-213	-90
Net	-52	13
Mortgage servicing rights [Member]
Assets:
Purchases	0	0
Sales	-1	0
Issuances	308	289
Settlements	0	0
Net	307	289
Derivative [Member]
Assets and Liabilities:
Purchases	2	0
Sales	-32	-58
Issuances	0	0
Settlements	-321	-75
Net	-351	-133
Derivative [Member] | Interest rate contract [Member]
Assets and Liabilities:
Purchases	0	0
Sales	0	0
Issuances	0	0
Settlements	-337	-264
Net	-337	-264
Derivative [Member] | Commodity contract [Member]
Assets and Liabilities:
Purchases	0	0
Sales	0	0
Issuances	0	0
Settlements	0	1
Net	0	1
Derivative [Member] | Equity contract [Member]
Assets and Liabilities:
Purchases	0	0
Sales	-32	-58
Issuances	0	0
Settlements	-19	97
Net	-51	39
Derivative [Member] | Foreign exchange contract [Member]
Assets and Liabilities:
Purchases	0	0
Sales	0	0
Issuances	0	0
Settlements	0	-5
Net	0	-5
Derivative [Member] | Credit contract [Member]
Assets and Liabilities:
Purchases	2	0
Sales	0	0
Issuances	0	0
Settlements	35	96
Net	37	96
Derivative [Member] | Other contract [Member]
Assets and Liabilities:
Purchases	0	0
Sales	0	0
Issuances	0	0
Settlements	0	0
Net	0	0
Other assets [Member]
Assets:
Purchases	0	608
Sales	0	0
Issuances	0	0
Settlements	-3	-8
Net	-3	600
Short sale liabilities [Member]
Liabilities:
Purchases	6	-5
Sales	-15	0
Issuances	0	0
Settlements	0	0
Net	-9	-5
Other liabilities [Member]
Liabilities:
Purchases	0	0
Sales	0	0
Issuances	0	0
Settlements	0	2
Net	$0	$2

Fair_Value_Assets_and_Liabilit3

Fair Value, Assets and Liabilities Measured on a Recurring Basis Level 3 Valuation Techniques and Significant Unobservable Inputs (Details) (USD $)	3 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Mortgages held for sale, carried at fair value	19,015	15,565
Loans	5,730	5,788
Mortgage servicing rights	11,739	12,738
Interest rate contract [Member] | Minimum [Member] | Discounted cash flow [Member]
Fair Value Inputs [Abstract]
Loss severity	50.00%	50.00%
Default rate	0.00%	0.00%
Interest rate contract [Member] | Maximum [Member] | Discounted cash flow [Member]
Fair Value Inputs [Abstract]
Loss severity	50.00%	50.00%
Default rate	0.05%	0.02%
Interest rate contract [Member] | Weighted Average [Member] | Discounted cash flow [Member]
Fair Value Inputs [Abstract]
Loss severity	50.00%	50.00%
Default rate	0.02%	0.01%
Derivative loan commitments [Member] | Minimum [Member] | Discounted cash flow [Member]
Fair Value Inputs [Abstract]
Fall-out factor	1.00%	1.00%
Initial-value servicing (in bps)	-0.30%	-0.31%
Derivative loan commitments [Member] | Maximum [Member] | Discounted cash flow [Member]
Fair Value Inputs [Abstract]
Fall-out factor	99.00%	99.00%
Initial-value servicing (in bps)	1.11%	1.13%
Derivative loan commitments [Member] | Weighted Average [Member] | Discounted cash flow [Member]
Fair Value Inputs [Abstract]
Fall-out factor	24.20%	24.50%
Initial-value servicing (in bps)	0.45%	0.47%
Equity contract [Member] | Minimum [Member] | Discounted cash flow [Member]
Fair Value Inputs [Abstract]
Weighted average life	9 months 18 days	1 year
Conversion factor	-11.20%	-11.20%
Equity contract [Member] | Minimum [Member] | Option model [Member]
Fair Value Inputs [Abstract]
Volatility factor	8.30%	8.30%
Correlation factor	-50.00%	-56.00%
Equity contract [Member] | Maximum [Member] | Discounted cash flow [Member]
Fair Value Inputs [Abstract]
Weighted average life	2 years 9 months 18 days	2 years
Conversion factor	0.00%	0.00%
Equity contract [Member] | Maximum [Member] | Option model [Member]
Fair Value Inputs [Abstract]
Volatility factor	100.00%	80.90%
Correlation factor	96.90%	96.30%
Equity contract [Member] | Weighted Average [Member] | Discounted cash flow [Member]
Fair Value Inputs [Abstract]
Weighted average life	1 year 1 month 6 days	1 year 3 months 18 days
Conversion factor	-7.60%	-8.40%
Equity contract [Member] | Weighted Average [Member] | Option model [Member]
Fair Value Inputs [Abstract]
Volatility factor	28.10%	28.30%
Correlation factor	59.00%	42.10%
Credit contract [Member] | Minimum [Member] | Market comparable pricing [Member]
Fair Value Inputs [Abstract]
Comparability adjustment	-28.70%	-28.60%
Credit contract [Member] | Minimum [Member] | Option model [Member]
Fair Value Inputs [Abstract]
Loss severity	11.50%	11.50%
Credit spread	0.00%	0.00%
Credit contract [Member] | Maximum [Member] | Market comparable pricing [Member]
Fair Value Inputs [Abstract]
Comparability adjustment	34.60%	26.30%
Credit contract [Member] | Maximum [Member] | Option model [Member]
Fair Value Inputs [Abstract]
Loss severity	72.50%	72.50%
Credit spread	15.20%	17.00%
Credit contract [Member] | Weighted Average [Member] | Market comparable pricing [Member]
Fair Value Inputs [Abstract]
Comparability adjustment	1.70%	1.80%
Credit contract [Member] | Weighted Average [Member] | Option model [Member]
Fair Value Inputs [Abstract]
Loss severity	50.10%	48.70%
Credit spread	0.80%	0.90%
Government, healthcare and other revenue bonds [Member] | Minimum [Member] | Discounted cash flow [Member]
Fair Value Inputs [Abstract]
Discount rate	0.50%	0.40%
Government, healthcare and other revenue bonds [Member] | Maximum [Member] | Discounted cash flow [Member]
Fair Value Inputs [Abstract]
Discount rate	5.80%	5.60%
Government, healthcare and other revenue bonds [Member] | Weighted Average [Member] | Discounted cash flow [Member]
Fair Value Inputs [Abstract]
Discount rate	1.70%	1.50%
Auction rate and other municipal bonds [Member] | Minimum [Member] | Discounted cash flow [Member]
Fair Value Inputs [Abstract]
Discount rate	2.00%	1.50%
Weighted average life	1 year 9 months 18 days	1 year 3 months 18 days
Auction rate and other municipal bonds [Member] | Maximum [Member] | Discounted cash flow [Member]
Fair Value Inputs [Abstract]
Discount rate	7.60%	7.60%
Weighted average life	19 years 3 months 18 days	19 years 4 months 24 days
Auction rate and other municipal bonds [Member] | Weighted Average [Member] | Discounted cash flow [Member]
Fair Value Inputs [Abstract]
Discount rate	4.00%	3.90%
Weighted average life	7 years 7 months 6 days	6 years 4 months 24 days
Collateralized loan and other debt obligations [Member] | Minimum [Member] | Market comparable pricing [Member]
Fair Value Inputs [Abstract]
Comparability adjustment	-53.30%	-53.90%
Collateralized loan and other debt obligations [Member] | Maximum [Member] | Market comparable pricing [Member]
Fair Value Inputs [Abstract]
Comparability adjustment	18.70%	25.00%
Collateralized loan and other debt obligations [Member] | Weighted Average [Member] | Market comparable pricing [Member]
Fair Value Inputs [Abstract]
Comparability adjustment	2.80%	0.90%
Auto loans and leases [Member] | Minimum [Member] | Discounted cash flow [Member]
Fair Value Inputs [Abstract]
Discount rate	-0.30%	0.40%
Auto loans and leases [Member] | Maximum [Member] | Discounted cash flow [Member]
Fair Value Inputs [Abstract]
Discount rate	-0.30%	0.40%
Auto loans and leases [Member] | Weighted Average [Member] | Discounted cash flow [Member]
Fair Value Inputs [Abstract]
Discount rate	-0.30%	0.40%
Diversified payment rights [Member] | Minimum [Member] | Discounted cash flow [Member]
Fair Value Inputs [Abstract]
Discount rate	1.00%	0.90%
Diversified payment rights [Member] | Maximum [Member] | Discounted cash flow [Member]
Fair Value Inputs [Abstract]
Discount rate	6.40%	7.10%
Diversified payment rights [Member] | Weighted Average [Member] | Discounted cash flow [Member]
Fair Value Inputs [Abstract]
Discount rate	2.80%	2.90%
Other commercial and consumer [Member] | Minimum [Member] | Discounted cash flow [Member]
Fair Value Inputs [Abstract]
Discount rate	1.80%	1.90%
Weighted average life	1 year 6 months	1 year 7 months 6 days
Other commercial and consumer [Member] | Maximum [Member] | Discounted cash flow [Member]
Fair Value Inputs [Abstract]
Discount rate	16.30%	21.50%
Weighted average life	9 years 7 months 6 days	10 years 8 months 12 days
Other commercial and consumer [Member] | Weighted Average [Member] | Discounted cash flow [Member]
Fair Value Inputs [Abstract]
Discount rate	5.60%	5.00%
Weighted average life	4 years 8 months 12 days	4 years
Perpetual preferred securities [Member] | Minimum [Member] | Discounted cash flow [Member]
Fair Value Inputs [Abstract]
Discount rate	4.00%	4.10%
Weighted average life	1 year	1 year
Perpetual preferred securities [Member] | Maximum [Member] | Discounted cash flow [Member]
Fair Value Inputs [Abstract]
Discount rate	9.00%	9.30%
Weighted average life	11 years 7 months 6 days	11 years 9 months 18 days
Perpetual preferred securities [Member] | Weighted Average [Member] | Discounted cash flow [Member]
Fair Value Inputs [Abstract]
Discount rate	6.30%	6.60%
Weighted average life	9 years 8 months 12 days	9 years 8 months 12 days
Mortgages held for sale [Member] | Minimum [Member] | Discounted cash flow [Member]
Fair Value Inputs [Abstract]
Discount rate	1.10%	1.10%
Prepayment rate	2.00%	2.00%
Loss severity	0.10%	0.10%
Default rate	0.60%	0.40%
Mortgages held for sale [Member] | Minimum [Member] | Market comparable pricing [Member]
Fair Value Inputs [Abstract]
Comparability adjustment	-93.20%	-93.00%
Mortgages held for sale [Member] | Maximum [Member] | Discounted cash flow [Member]
Fair Value Inputs [Abstract]
Discount rate	6.20%	7.70%
Prepayment rate	18.60%	15.50%
Loss severity	26.50%	26.40%
Default rate	15.00%	15.00%
Mortgages held for sale [Member] | Maximum [Member] | Market comparable pricing [Member]
Fair Value Inputs [Abstract]
Comparability adjustment	9.60%	10.00%
Mortgages held for sale [Member] | Weighted Average [Member] | Discounted cash flow [Member]
Fair Value Inputs [Abstract]
Discount rate	5.00%	5.20%
Prepayment rate	9.80%	8.10%
Loss severity	18.10%	18.30%
Default rate	2.40%	2.60%
Mortgages held for sale [Member] | Weighted Average [Member] | Market comparable pricing [Member]
Fair Value Inputs [Abstract]
Comparability adjustment	-31.20%	-30.00%
Loans [Member] | Minimum [Member] | Discounted cash flow [Member]
Fair Value Inputs [Abstract]
Discount rate	0.00%	0.00%
Prepayment rate	0.40%	0.60%
Utilization rate	0.00%	0.00%
Loans [Member] | Maximum [Member] | Discounted cash flow [Member]
Fair Value Inputs [Abstract]
Discount rate	3.60%	3.80%
Prepayment rate	100.00%	100.00%
Utilization rate	1.00%	1.00%
Loans [Member] | Weighted Average [Member] | Discounted cash flow [Member]
Fair Value Inputs [Abstract]
Discount rate	3.00%	3.10%
Prepayment rate	12.20%	11.20%
Utilization rate	0.40%	0.40%
Residential mortgage servicing rights [Member] | Minimum [Member] | Discounted cash flow [Member]
Fair Value Inputs [Abstract]
Discount rate	5.30%	5.90%
Prepayment rate	8.30%	8.00%
Cost to service per loan	86	86
Residential mortgage servicing rights [Member] | Maximum [Member] | Discounted cash flow [Member]
Fair Value Inputs [Abstract]
Discount rate	17.40%	16.90%
Prepayment rate	24.60%	22.00%
Cost to service per loan	662	683
Residential mortgage servicing rights [Member] | Weighted Average [Member] | Discounted cash flow [Member]
Fair Value Inputs [Abstract]
Discount rate	7.40%	7.60%
Prepayment rate	13.20%	12.50%
Cost to service per loan	174	179
Other assets: nonmarketable equity investments [Member] | Minimum [Member] | Market comparable pricing [Member]
Fair Value Inputs [Abstract]
Comparability adjustment	-22.00%	-19.70%
Other assets: nonmarketable equity investments [Member] | Maximum [Member] | Market comparable pricing [Member]
Fair Value Inputs [Abstract]
Comparability adjustment	-4.80%	-4.00%
Other assets: nonmarketable equity investments [Member] | Weighted Average [Member] | Market comparable pricing [Member]
Fair Value Inputs [Abstract]
Comparability adjustment	-13.30%	-14.70%
Recurring [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Mortgages held for sale, carried at fair value	19,015	15,565
Loans	5,730	5,788
Mortgage servicing rights	11,739	12,738
Fair Value, Inputs, Level 3 [Member] | Recurring [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Mortgages held for sale, carried at fair value	2,098	2,313
Loans	5,730	5,788
Mortgage servicing rights	11,739	12,738
Total insignificant level 3 assets, net of liabilities	504	507
Total level 3 assets, net of liabilities	28,314	30,054
Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Interest rate contract [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Net derivative assets and liabilities	238	196
Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Derivative loan commitments [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Net derivative assets and liabilities	200	97
Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Equity contract [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Net derivative assets and liabilities	110	162
Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Equity contract [Member] | Option model [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Net derivative assets and liabilities	-296	-246
Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Credit contract [Member] | Market comparable pricing [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Net derivative assets and liabilities	-157	-192
Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Credit contract [Member] | Option model [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Net derivative assets and liabilities	3	3
Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Government, healthcare and other revenue bonds [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading and available for sale securities	1,634	1,900
Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Government, healthcare and other revenue bonds [Member] | Vendor priced [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading and available for sale securities	59	61
Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Auction rate and other municipal bonds [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading and available for sale securities	293	323
Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Collateralized loan and other debt obligations [Member] | Market comparable pricing [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading and available for sale securities	462	565
Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Collateralized loan and other debt obligations [Member] | Vendor priced [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading and available for sale securities	972	967
Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Auto loans and leases [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading and available for sale securities	249	245
Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Diversified payment rights [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading and available for sale securities	617	661
Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Other commercial and consumer [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading and available for sale securities	632	750
Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Other commercial and consumer [Member] | Vendor priced [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading and available for sale securities	38	40
Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Perpetual preferred securities [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Trading and available for sale securities	640	663
Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Mortgages held for sale [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Mortgages held for sale, carried at fair value	2,024	2,235
Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Mortgages held for sale [Member] | Market comparable pricing [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Mortgages held for sale, carried at fair value	74	78
Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Loans [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Loans	5,730	5,788
Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Residential mortgage servicing rights [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Mortgage servicing rights	11,739	12,738
Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Other assets: nonmarketable equity investments [Member] | Market comparable pricing [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Other assets: nonmarketable equity investments	2,549	2,512

Fair_Value_Assets_Recorded_at_

Fair Value, Assets Recorded at Fair Value on Nonrecurring Basis (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Millions, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgages held for sale	$19,015	$15,565
Loans	5,730	5,788
Other assets, carried at fair value	2,549	2,512
Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgages held for sale	3,056	3,295
Loans	659	2,266
Other assets, carried at fair value	299	877
Nonrecurring [Member] | Total Commercial [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	115	243
Nonrecurring [Member] | Total Consumer [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	544	2,023
Level 1 [Member] | Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgages held for sale	0	0
Loans	0	0
Other assets, carried at fair value	0	0
Level 1 [Member] | Nonrecurring [Member] | Total Commercial [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	0	0
Level 1 [Member] | Nonrecurring [Member] | Total Consumer [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	0	0
Level 2 [Member] | Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgages held for sale	2,070	2,197
Loans	652	2,261
Other assets, carried at fair value	186	417
Level 2 [Member] | Nonrecurring [Member] | Total Commercial [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	115	243
Level 2 [Member] | Nonrecurring [Member] | Total Consumer [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	537	2,018
Level 3 [Member] | Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgages held for sale	986	1,098
Loans	7	5
Other assets, carried at fair value	113	460
Level 3 [Member] | Nonrecurring [Member] | Total Commercial [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	0	0
Level 3 [Member] | Nonrecurring [Member] | Total Consumer [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	$7	$5

Fair_Value_Changes_in_Fair_Val

Fair Value, Changes in Fair Value of Assets Recorded at Fair Value on Nonrecurring Basis (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Fair Value Assets And Liabilities Measured On Nonrecurring Basis Increase (Decrease) [Line Items]
Mortgages held for sale (LOCOM)	$31	$46
Loans	-376	-504
Other assets	-61	0
Total	-406	-458
Total Commercial [Member]
Fair Value Assets And Liabilities Measured On Nonrecurring Basis Increase (Decrease) [Line Items]
Loans	-35	-36
Total Consumer [Member]
Fair Value Assets And Liabilities Measured On Nonrecurring Basis Increase (Decrease) [Line Items]
Loans	($341)	($468)

Fair_Value_Assets_Recorded_at_1

Fair Value, Assets Recorded at Fair Value on a Nonrecurring Basis Level 3 Valuation Techniques and Significant Unobservable Inputs (Details) (USD $)	3 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Mortgages held for sale	19,015	15,565
Minimum [Member] | Mortgages held for sale [Member] | Discounted cash flow [Member]
Fair Value Inputs [Abstract]
Default rate	0.60%	0.40%
Discount rate	1.10%	1.10%
Loss severity	0.10%	0.10%
Prepayment rate	2.00%	2.00%
Minimum [Member] | Mortgages held for sale [Member] | Market comparable pricing [Member]
Fair Value Inputs [Abstract]
Comparability adjustment	-93.20%	-93.00%
Maximum [Member] | Mortgages held for sale [Member] | Discounted cash flow [Member]
Fair Value Inputs [Abstract]
Default rate	15.00%	15.00%
Discount rate	6.20%	7.70%
Loss severity	26.50%	26.40%
Prepayment rate	18.60%	15.50%
Maximum [Member] | Mortgages held for sale [Member] | Market comparable pricing [Member]
Fair Value Inputs [Abstract]
Comparability adjustment	9.60%	10.00%
Weighted Average [Member] | Mortgages held for sale [Member] | Discounted cash flow [Member]
Fair Value Inputs [Abstract]
Default rate	2.40%	2.60%
Discount rate	5.00%	5.20%
Loss severity	18.10%	18.30%
Prepayment rate	9.80%	8.10%
Weighted Average [Member] | Mortgages held for sale [Member] | Market comparable pricing [Member]
Fair Value Inputs [Abstract]
Comparability adjustment	-31.20%	-30.00%
Nonrecurring [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Mortgages held for sale	3,056	3,295
Nonrecurring [Member] | Minimum [Member] | Market comparable pricing [Member]
Fair Value Inputs [Abstract]
Comparability adjustment		6.00%
Nonrecurring [Member] | Minimum [Member] | Residential [Member] | Mortgages held for sale [Member] | Discounted cash flow [Member]
Fair Value Inputs [Abstract]
Default rate	0.20%	0.90%
Discount rate	1.50%	1.50%
Loss severity	1.20%	0.00%
Prepayment rate	2.00%	2.00%
Nonrecurring [Member] | Maximum [Member] | Market comparable pricing [Member]
Fair Value Inputs [Abstract]
Comparability adjustment		6.00%
Nonrecurring [Member] | Maximum [Member] | Residential [Member] | Mortgages held for sale [Member] | Discounted cash flow [Member]
Fair Value Inputs [Abstract]
Default rate	3.70%	3.80%
Discount rate	8.50%	8.50%
Loss severity	37.80%	29.80%
Prepayment rate	100.00%	100.00%
Nonrecurring [Member] | Weighted Average [Member] | Market comparable pricing [Member]
Fair Value Inputs [Abstract]
Comparability adjustment		6.00%
Nonrecurring [Member] | Weighted Average [Member] | Residential [Member] | Mortgages held for sale [Member] | Discounted cash flow [Member]
Fair Value Inputs [Abstract]
Default rate	2.60%	2.10%
Discount rate	3.50%	3.60%
Loss severity	3.80%	3.80%
Prepayment rate	59.60%	65.50%
Fair Value, Inputs, Level 3 [Member] | Nonrecurring [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Mortgages held for sale	986	1,098
Other assets: private equity fund investments		171
Insignificant level 3 assets	120	294
Total	1,106	1,563
Fair Value, Inputs, Level 3 [Member] | Nonrecurring [Member] | Residential [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Mortgages held for sale	986	1,098

Fair_Value_Investments_in_Enti

Fair Value, Investments in Entities That Calculate Net Asset Value Per Share (Details) (USD $)	3 Months Ended		12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair value	$1,364,000,000		1,507,000,000
Unfunded commitments	245,000,000		252,000,000
Fair Value of cost method NMEI funds using NAV	1,300,000,000		1,300,000,000
Offshore Funds [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair value	60,000,000		125,000,000
Unfunded commitments	0		0
Redemption frequency	Daily - Quarterly	Daily - Quarterly
Alternative Investments, Assets With Redemption Restrictions, Fair Value Disclosure	24,000,000		24,000,000
Offshore Funds [Member] | Minimum [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Redemption notice period	1 day		1 day
Offshore Funds [Member] | Maximum [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Redemption notice period	60 days		60 days
Hedge funds [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair value	1,000,000		1,000,000
Unfunded commitments	0		0
Redemption frequency	Daily - Quarterly	Daily - Quarterly
Hedge funds [Member] | Minimum [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Redemption notice period	1 day		1 day
Hedge funds [Member] | Maximum [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Redemption notice period	90 days		90 days
Private Equity Funds [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair value	1,235,000,000		1,313,000,000
Unfunded commitments	236,000,000		243,000,000
Venture capital funds [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair value	68,000,000		68,000,000
Unfunded commitments	$9,000,000		9,000,000

Fair_Value_Option_Carrying_Amo

Fair Value, Option, Carrying Amount (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Millions, unless otherwise specified
Fair Value, Option, Quantitative Disclosures [Line Items]
Mortgages held for sale	$19,015	$15,565
Loans held for sale	1	1
Loans	5,730	5,788
Other assets, carried at fair value	2,549	2,512
Trading assets - loans [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Trading assets, loans	1,110	1,387
Trading assets, loans, unpaid principal	1,132	1,410
Trading assets, loans, aggregate difference	-22	-23
Nonaccrual loans	0	0
Nonaccrual loans, unpaid principal	0	1
Nonaccrual loans, Aggregate difference	0	-1
Mortgages held for sale [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Mortgages held for sale	19,015	15,565
Mortgages held for sale, unpaid principal	18,551	15,246
Loans, Loans held for sale and Mortgages held for sale, aggregate difference	464	319
Nonaccrual loans	129	160
Nonaccrual loans, unpaid principal	213	252
Nonaccrual loans, Aggregate difference	-84	-92
Loans 90 days or more past due and still accruing	26	27
Loans 90 days or more past due and still accruing, Unpaid principal	29	30
Loans 90 days or more past due and still accruing, Aggregate difference	-3	-3
Loans held for sale [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Loans held for sale	1	1
Loans held for sale, unpaid principal	10	10
Loans, Loans held for sale and Mortgages held for sale, aggregate difference	-9	-9
Nonaccrual loans	1	1
Nonaccrual loans, unpaid principal	10	10
Nonaccrual loans, Aggregate difference	-9	-9
Loans [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Loans	5,730	5,788
Loans, Unpaid principal	5,475	5,527
Loans, Loans held for sale and Mortgages held for sale, aggregate difference	255	261
Nonaccrual loans	431	367
Nonaccrual loans, unpaid principal	442	376
Nonaccrual loans, Aggregate difference	-11	-9
Other assets [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Other assets, carried at fair value	$2,549	$2,512

Fair_Value_Option_Gains_and_Lo

Fair Value, Option, Gains and Losses (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Mortgage banking noninterest income [Member] | Trading assets - loans [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	$0	$0
Mortgage banking noninterest income [Member] | Mortgages held for sale [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	581	506
Mortgage banking noninterest income [Member] | Loans [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	0	0
Mortgage banking noninterest income [Member] | Other assets [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	0	0
Mortgage banking noninterest income [Member] | Other interests held [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	0	0
Net gains (losses) from trading activities [Member] | Trading assets - loans [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	15	12
Net gains (losses) from trading activities [Member] | Mortgages held for sale [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	0	0
Net gains (losses) from trading activities [Member] | Loans [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	0	0
Net gains (losses) from trading activities [Member] | Other assets [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	0	0
Net gains (losses) from trading activities [Member] | Other interests held [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	0	-1
Other noninterest income [Member] | Trading assets - loans [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	1	0
Other noninterest income [Member] | Mortgages held for sale [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	0	0
Other noninterest income [Member] | Loans [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	-4	0
Other noninterest income [Member] | Other assets [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	38	-61
Other noninterest income [Member] | Other interests held [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	$0	($1)

Fair_Value_Option_Instrument_S

Fair Value, Option, Instrument Specific Credit Risk (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (losses) attributable to instrument-specific credit risk	$32	$22
Trading assets - loans [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (losses) attributable to instrument-specific credit risk	15	12
Mortgages held for sale [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (losses) attributable to instrument-specific credit risk	$17	$10

Fair_Value_Estimates_for_Finan

Fair Value, Estimates for Financial Instruments Excluding those Recorded at Fair Value on a Recurring Basis (Details) (USD $)	Mar. 31, 2015		Dec. 31, 2014		Mar. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Financial assets
Cash and due from banks	$19,793		$19,571		$19,731	$19,919
Federal funds sold, securities purchased under resale agreements and other short-term investments	291,317		258,429
Held-to-maturity securities	67,133		55,483
Mortgages held for sale	23,606	[1]	19,536	[1]
Loans held for sale	681	[1]	722	[1]
Loans	861,231	[1]	862,551	[1]
Nonmarketable equity investments (cost method)	6,912		7,033
Financial liabilities
Deposits	1,196,663		1,168,310
Short-term borrowings	77,697		63,518
Long-Term Debt	183,292		183,943
Carrying value [Member]
Financial assets
Cash and due from banks	19,793		19,571
Federal funds sold, securities purchased under resale agreements and other short-term investments	291,317		258,429
Held-to-maturity securities	67,133		55,483
Mortgages held for sale	4,591		3,971
Loans held for sale	680		721
Loans	831,427		832,671
Nonmarketable equity investments (cost method)	6,912		7,033
Financial liabilities
Deposits	1,196,663		1,168,310
Short-term borrowings	77,697		63,518
Long-Term Debt	183,283		183,934
Estimated fair value [Member]
Financial assets
Cash and due from banks	19,793		19,571
Federal funds sold, securities purchased under resale agreements and other short-term investments	291,317		258,429
Held-to-maturity securities	68,781		56,359
Mortgages held for sale	4,594		3,973
Loans held for sale	697		739
Loans	844,603		844,838
Nonmarketable equity investments (cost method)	8,599		8,377
Financial liabilities
Deposits	1,196,739		1,168,411
Short-term borrowings	77,697		63,518
Long-Term Debt	185,026		185,475
Estimated fair value [Member] | Fair Value, Inputs, Level 1 [Member]
Financial assets
Cash and due from banks	19,793		19,571
Federal funds sold, securities purchased under resale agreements and other short-term investments	7,100		8,991
Held-to-maturity securities	45,676		41,548
Mortgages held for sale	0		0
Loans held for sale	0		0
Loans	0		0
Nonmarketable equity investments (cost method)	0		0
Financial liabilities
Deposits	0		0
Short-term borrowings	0		0
Long-Term Debt	0		0
Estimated fair value [Member] | Fair Value, Inputs, Level 2 [Member]
Financial assets
Cash and due from banks	0		0
Federal funds sold, securities purchased under resale agreements and other short-term investments	284,217		249,438
Held-to-maturity securities	17,996		9,021
Mortgages held for sale	3,608		2,875
Loans held for sale	697		739
Loans	60,086		60,052
Nonmarketable equity investments (cost method)	0		0
Financial liabilities
Deposits	1,163,086		1,132,845
Short-term borrowings	77,697		63,518
Long-Term Debt	175,239		174,996
Estimated fair value [Member] | Fair Value, Inputs, Level 3 [Member]
Financial assets
Cash and due from banks	0		0
Federal funds sold, securities purchased under resale agreements and other short-term investments	0		0
Held-to-maturity securities	5,109		5,790
Mortgages held for sale	986		1,098
Loans held for sale	0		0
Loans	784,517		784,786
Nonmarketable equity investments (cost method)	8,599		8,377
Financial liabilities
Deposits	33,653		35,566
Short-term borrowings	0		0
Long-Term Debt	$9,787		$10,479
[1]	Parenthetical amounts represent assets and liabilities for which we have elected the fair value option.

Preferred_Stock_Textuals_Detai

Preferred Stock Textuals (Details) (USD $)	3 Months Ended	1 Months Ended
	Mar. 31, 2015	Jan. 31, 2015	Dec. 31, 2014
Preferred Stock (Textual) [Abstract]
Par value	$23,397,000,000		$20,612,000,000
Shares issued and outstanding	12,004,103		11,138,818
Voting Rights	If issued, preference shares would be limited to one vote per share
Additional paid-in capital included related to preferred stock	179,000,000		109,000,000
Preferred Stock, No Voting Rights [Member]
Preferred Stock (Textual) [Abstract]
Preferred shares authorized	20,000,000
Par value
Preferred Stock, Voting Rights [Member]
Preferred Stock (Textual) [Abstract]
Preferred shares authorized	4,000,000
Par value
Number of votes per share	1
Shares issued and outstanding	0
Series G - 7.25% Class A Preferred Stock [Member]
Preferred Stock (Textual) [Abstract]
Preferred stock, commitment to issue	0
Series H - Floating Class A Preferred Stock [Member]
Preferred Stock (Textual) [Abstract]
Preferred stock, commitment to issue	0
Series U - 5.875% Fixed-to-Floating Non-Cumulative Perpetual Class A Preferred Stock [Member]
Preferred Stock (Textual) [Abstract]
Par value	$2,000,000,000	$2,000,000,000	$0
Shares issued and outstanding	80,000		0
Depositary shares issued and outstanding		2,000,000
Percentage Interest in a share of issued preferred stock		4.00%
Stock Compensation Plan [Member] | Convertible Preferred Stock [Member]
Preferred Stock (Textual) [Abstract]
Preferred stock, redemption price per share	$1,000

Preferred_Stock_Details

Preferred Stock (Details) (USD $)	3 Months Ended	12 Months Ended
In Millions, except Share data, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014	Jan. 31, 2015
Detail of Preferred Stock [Abstract]
Preferred Stock, Shares authorized and designated	12,463,282	11,597,997
ESOP, Liquidation preference per share	$0	$0
ESOP, Shares authorized and designated	2,036,572	1,251,287
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Shares issued and outstanding	12,004,103	11,138,818
Par value	$23,397	$20,612
Carrying value	21,998	19,213
Discount	1,399	1,399
ESOP Shares issued and outstanding	2,036,572	1,251,287
ESOP Par value	2,036	1,251
ESOP Carrying value	2,036	1,251
ESOP Discount	0	0
Dividend Equalization Preferred Shares (DEP) [Member]
Detail of Preferred Stock [Abstract]
Preferred Stock, Liquidation preference per share (in dollars per share)	$10	$10
Preferred Stock, Shares authorized and designated	97,000	97,000
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Shares issued and outstanding	96,546	96,546
Par value	0	0
Carrying value	0	0
Discount	0	0
Series G - 7.25% Class A Preferred Stock [Member]
Detail of Preferred Stock [Abstract]
Preferred Stock, Dividend rate (percent)	7.25%	7.25%
Preferred Stock, Liquidation preference per share (in dollars per share)	$15,000	$15,000
Preferred Stock, Shares authorized and designated	50,000	50,000
Series H - Floating Class A Preferred Stock [Member]
Detail of Preferred Stock [Abstract]
Preferred Stock, Liquidation preference per share (in dollars per share)	$20,000	$20,000
Preferred Stock, Shares authorized and designated	50,000	50,000
Series I - Floating Class A Preferred Stock [Member]
Detail of Preferred Stock [Abstract]
Preferred Stock, Liquidation preference per share (in dollars per share)	$100,000	$100,000
Preferred Stock, Shares authorized and designated	25,010	25,010
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Shares issued and outstanding	25,010	25,010
Par value	2,501	2,501
Carrying value	2,501	2,501
Discount	0	0
Series J - 8.00% Non-Cumulative Perpetual Class A Preferred Stock [Member]
Detail of Preferred Stock [Abstract]
Preferred Stock, Dividend rate (percent)	8.00%	8.00%
Preferred Stock, Liquidation preference per share (in dollars per share)	$1,000	$1,000
Preferred Stock, Shares authorized and designated	2,300,000	2,300,000
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Shares issued and outstanding	2,150,375	2,150,375
Par value	2,150	2,150
Carrying value	1,995	1,995
Discount	155	155
Series K - 7.98% Fixed-to-Floating Non-Cumulative Perpetual Class A Preferred Stock [Member]
Detail of Preferred Stock [Abstract]
Preferred Stock, Dividend rate (percent)	7.98%	7.98%
Preferred Stock, Liquidation preference per share (in dollars per share)	$1,000	$1,000
Preferred Stock, Shares authorized and designated	3,500,000	3,500,000
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Shares issued and outstanding	3,352,000	3,352,000
Par value	3,352	3,352
Carrying value	2,876	2,876
Discount	476	476
Series L - 7.50% Non-Cumulative Perpetual Convertible Class A Preferred Stock [Member]
Detail of Preferred Stock [Abstract]
Preferred Stock, Dividend rate (percent)	7.50%	7.50%
Preferred Stock, Liquidation preference per share (in dollars per share)	$1,000	$1,000
Preferred Stock, Shares authorized and designated	4,025,000	4,025,000
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Shares issued and outstanding	3,968,000	3,968,000
Par value	3,968	3,968
Carrying value	3,200	3,200
Discount	768	768
Series N - 5.20% Non-Cumulative Perpetual Class A Preferred Stock [Member]
Detail of Preferred Stock [Abstract]
Preferred Stock, Dividend rate (percent)	5.20%	5.20%
Preferred Stock, Liquidation preference per share (in dollars per share)	$25,000	$25,000
Preferred Stock, Shares authorized and designated	30,000	30,000
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Shares issued and outstanding	30,000	30,000
Par value	750	750
Carrying value	750	750
Discount	0	0
Series O - 5.125% Non-Cumulative Perpetual Class A Preferred Stock [Member]
Detail of Preferred Stock [Abstract]
Preferred Stock, Dividend rate (percent)	5.13%	5.13%
Preferred Stock, Liquidation preference per share (in dollars per share)	$25,000	$25,000
Preferred Stock, Shares authorized and designated	27,600	27,600
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Shares issued and outstanding	26,000	26,000
Par value	650	650
Carrying value	650	650
Discount	0	0
Series P - 5.25% Non-Cumulative Perpetual Class A Preferred Stock [Member]
Detail of Preferred Stock [Abstract]
Preferred Stock, Dividend rate (percent)	5.25%	5.25%
Preferred Stock, Liquidation preference per share (in dollars per share)	$25,000	$25,000
Preferred Stock, Shares authorized and designated	26,400	26,400
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Shares issued and outstanding	25,000	25,000
Par value	625	625
Carrying value	625	625
Discount	0	0
Series Q - 5.85% Fixed-to-Floating Non-Cumulative Perpetual Class A Preferred Stock [Member]
Detail of Preferred Stock [Abstract]
Preferred Stock, Dividend rate (percent)	5.85%	5.85%
Preferred Stock, Liquidation preference per share (in dollars per share)	$25,000	$25,000
Preferred Stock, Shares authorized and designated	69,000	69,000
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Shares issued and outstanding	69,000	69,000
Par value	1,725	1,725
Carrying value	1,725	1,725
Discount	0	0
Series R - 6.625% Fixed-to-Floating Non-Cumulative Perpetual Class A Preferred Stock [Member]
Detail of Preferred Stock [Abstract]
Preferred Stock, Dividend rate (percent)	6.63%	6.63%
Preferred Stock, Liquidation preference per share (in dollars per share)	$25,000	$25,000
Preferred Stock, Shares authorized and designated	34,500	34,500
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Shares issued and outstanding	33,600	33,600
Par value	840	840
Carrying value	840	840
Discount	0	0
Series S - 5.900% Fixed-to-Floating Non-Cumulative Perpetual Class A Preferred Stock [Member]
Detail of Preferred Stock [Abstract]
Preferred Stock, Dividend rate (percent)	5.90%	5.90%
Preferred Stock, Liquidation preference per share (in dollars per share)	$25,000	$25,000
Preferred Stock, Shares authorized and designated	80,000	80,000
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Shares issued and outstanding	80,000	80,000
Par value	2,000	2,000
Carrying value	2,000	2,000
Discount	0	0
Series T - 6.000% Non-Cumulative Perpetual Class A Preferred Stock [Member]
Detail of Preferred Stock [Abstract]
Preferred Stock, Dividend rate (percent)	6.00%	6.00%
Preferred Stock, Liquidation preference per share (in dollars per share)	$25,000	$25,000
Preferred Stock, Shares authorized and designated	32,200	32,200
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Shares issued and outstanding	32,000	32,000
Par value	800	800
Carrying value	800	800
Discount	0	0
Series U - 5.875% Fixed-to-Floating Non-Cumulative Perpetual Class A Preferred Stock [Member]
Detail of Preferred Stock [Abstract]
Preferred Stock, Dividend rate (percent)	5.88%	0.00%
Preferred Stock, Liquidation preference per share (in dollars per share)	$25,000	$0
Preferred Stock, Shares authorized and designated	80,000	0
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Shares issued and outstanding	80,000	0
Par value	2,000	0	2,000
Carrying value	2,000	0
Discount	$0	$0

ESOP_Preferred_Stock_Details

ESOP Preferred Stock (Details) (USD $)	3 Months Ended	12 Months Ended
In Millions, except Share data, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]
Shares issued and outstanding	2,036,572	1,251,287
Carrying value	2,036	1,251
Unearned ESOP shares	-2,215	-1,360
Employee Stock Ownership Plan Preferred Stock 2015 [Member]
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]
Shares issued and outstanding	826,598	0
Carrying value	826	0
Employee Stock Ownership Plan Preferred Stock 2015 [Member] | Minimum [Member]
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]
Adjustable dividend rate	8.90%	0.00%
Employee Stock Ownership Plan Preferred Stock 2015 [Member] | Maximum [Member]
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]
Adjustable dividend rate	9.90%	0.00%
Employee Stock Ownership Plan Preferred Stock 2014 [Member]
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]
Shares issued and outstanding	320,019	352,158
Carrying value	320	352
Employee Stock Ownership Plan Preferred Stock 2014 [Member] | Minimum [Member]
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]
Adjustable dividend rate	8.70%	8.70%
Employee Stock Ownership Plan Preferred Stock 2014 [Member] | Maximum [Member]
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]
Adjustable dividend rate	9.70%	9.70%
Employee Stock Ownership Plan Preferred Stock 2013 [Member]
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]
Shares issued and outstanding	278,826	288,000
Carrying value	279	288
Employee Stock Ownership Plan Preferred Stock 2013 [Member] | Minimum [Member]
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]
Adjustable dividend rate	8.50%	8.50%
Employee Stock Ownership Plan Preferred Stock 2013 [Member] | Maximum [Member]
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]
Adjustable dividend rate	9.50%	9.50%
Employee Stock Ownership Plan Preferred Stock 2012 [Member]
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]
Shares issued and outstanding	189,204	189,204
Carrying value	189	189
Employee Stock Ownership Plan Preferred Stock 2012 [Member] | Minimum [Member]
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]
Adjustable dividend rate	10.00%	10.00%
Employee Stock Ownership Plan Preferred Stock 2012 [Member] | Maximum [Member]
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]
Adjustable dividend rate	11.00%	11.00%
Employee Stock Ownership Plan Preferred Stock 2011 [Member]
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]
Shares issued and outstanding	205,263	205,263
Carrying value	205	205
Employee Stock Ownership Plan Preferred Stock 2011 [Member] | Minimum [Member]
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]
Adjustable dividend rate	9.00%	9.00%
Employee Stock Ownership Plan Preferred Stock 2011 [Member] | Maximum [Member]
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]
Adjustable dividend rate	10.00%	10.00%
Employee Stock Ownership Plan Preferred Stock 2010 [Member]
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]
Shares issued and outstanding	141,011	141,011
Carrying value	141	141
Employee Stock Ownership Plan Preferred Stock 2010 [Member] | Minimum [Member]
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]
Adjustable dividend rate	9.50%	9.50%
Employee Stock Ownership Plan Preferred Stock 2010 [Member] | Maximum [Member]
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]
Adjustable dividend rate	10.50%	10.50%
Employee Stock Ownership Plan Preferred Stock 2008 [Member]
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]
Shares issued and outstanding	42,204	42,204
Carrying value	42	42
Employee Stock Ownership Plan Preferred Stock 2008 [Member] | Minimum [Member]
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]
Adjustable dividend rate	10.50%	10.50%
Employee Stock Ownership Plan Preferred Stock 2008 [Member] | Maximum [Member]
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]
Adjustable dividend rate	11.50%	11.50%
Employee Stock Ownership Plan Preferred Stock 2007 [Member]
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]
Shares issued and outstanding	24,728	24,728
Carrying value	25	25
Employee Stock Ownership Plan Preferred Stock 2007 [Member] | Minimum [Member]
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]
Adjustable dividend rate	10.75%	10.75%
Employee Stock Ownership Plan Preferred Stock 2007 [Member] | Maximum [Member]
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]
Adjustable dividend rate	11.75%	11.75%
Employee Stock Ownership Plan Preferred Stock 2006 [Member]
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]
Shares issued and outstanding	8,719	8,719
Carrying value	9	9
Employee Stock Ownership Plan Preferred Stock 2006 [Member] | Minimum [Member]
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]
Adjustable dividend rate	10.75%	10.75%
Employee Stock Ownership Plan Preferred Stock 2006 [Member] | Maximum [Member]
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]
Adjustable dividend rate	11.75%	11.75%

Employee_Benefits_Components_o

Employee Benefits, Components of Net Periodic Benefit Cost (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Pension benefits qualified [Member]
Components of net periodic benefit cost [Abstract]
Service cost	$0	$0
Interest cost	107	116
Expected return on plan assets	-161	-157
Amortization of net actuarial loss (gain)	27	23
Amortization of prior service credit	0	0
Settlement loss	0	0
Net periodic benefit cost (income)	-27	-18
Pension benefits nonqualified [Member]
Components of net periodic benefit cost [Abstract]
Service cost	0	0
Interest cost	6	6
Expected return on plan assets	0	0
Amortization of net actuarial loss (gain)	5	3
Amortization of prior service credit	0	0
Settlement loss	13	0
Net periodic benefit cost (income)	24	9
Other benefits [Member]
Components of net periodic benefit cost [Abstract]
Service cost	2	2
Interest cost	11	11
Expected return on plan assets	-9	-9
Amortization of net actuarial loss (gain)	-1	-7
Amortization of prior service credit	-1	-1
Settlement loss	0	0
Net periodic benefit cost (income)	$2	($4)

Earnings_Per_Common_Share_Calc

Earnings Per Common Share, Calculation of Earnings and Diluted Earnings per Common Share (Details) (USD $)	3 Months Ended
In Millions, except Per Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Earnings Per Common Share [Abstract]
Wells Fargo net income	$5,804	$5,893
Less: Preferred stock dividends and other	343	286
Wells Fargo net income applicable to common stock	$5,461	$5,607
Earnings per common share
Average common shares outstanding (denominator)	5,160.40	5,262.80
Per share	$1.06	$1.07
Diluted earnings per common share
Average common shares outstanding (in shares)	5,160.40	5,262.80
Diluted average common shares outstanding (denominator)	5,243.60	5,353.30
Per share	$1.04	$1.05
Stock Option [Member]
Diluted earnings per common share
Weighted average number of diluted shares outstanding, adjustment (in shares)	28.8	33.5
Restricted Share Rights [Member]
Diluted earnings per common share
Weighted average number of diluted shares outstanding, adjustment (in shares)	40.2	46.5
Warrants [Member]
Diluted earnings per common share
Weighted average number of diluted shares outstanding, adjustment (in shares)	14.2	10.5

Earnings_Per_Common_Share_Anti

Earnings Per Common Share, Antidilutive Securities Excluded from the Calculation of Diluted Earnings per Common Share (Details) (Stock Option [Member])	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Stock Option [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Instruments	7.1	9.6

Other_Comprehensive_Income_Com

Other Comprehensive Income, Components of Other Comprehensive Income (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Investment securities:
Net unrealized gains arising during the period	$393	$2,725
Net unrealized gains arising during the period, Tax effect	-47	-993
Net unrealized gains arising during the period, Net of tax	346	1,732
Reclassification of net gains to net income, Before tax	-300	-394
Reclassification of net gains to net income, Tax effect	113	149
Reclassification of net gains to net income, Net of tax	-187	-245
Net change, Before tax	93	2,331
Net change, Tax effect	66	-844
Net change, Net of tax	159	1,487
Derivatives and hedging activities:
Net unrealized gains arising during the period	952	44
Net unrealized gains arising during the period, Tax effect	-359	-17
Net unrealized gains arising during the period, Net of tax	593	27
Reclassification of net (gains) losses on cash flow hedges to net income, Before tax	-234	-106
Reclassification of net (gains) losses on cash flow hedges to net income, Tax effect	89	40
Reclassification of net (gains) losses on cash flow hedges to net income, Net of tax	-145	-66
Net change, Before tax	718	-62
Net change, Tax effect	-270	23
Net change, Net of tax	448	-39
Defined benefit plans adjustments:
Net actuarial losses arising during the period	-11	0
Net actuarial losses arising during the period, Tax effect	4	0
Net actuarial losses arising during the period, Net of tax	-7	0
Amortization of net actuarial loss, Before tax	31	19
Amortization of net actuarial loss, Tax effect	-12	-7
Amortization of net actuarial loss, Net of tax	19	12
Settlements and other, Before tax	12	-1
Settlements and other, Tax effect	-5	0
Settlements and other, Net of tax	7	-1
Reclassification of amounts to net periodic benefit costs, Before tax	43	18
Reclassification of amounts to net periodic benefit costs, Tax effect	-17	-7
Reclassification of amounts to net periodic benefit costs, Net of tax	26	11
Net change, Before tax	32	18
Net change, Tax effect	-13	-7
Net change, Net of tax	19	11
Foreign currency translation adjustments:
Net unrealized losses arising during the period, Before tax	-55	-17
Net unrealized losses arising during the period, Tax effect	-11	-3
Net unrealized losses arising during the period, Net of tax	-66	-20
Reclassification of net losses to net income, Net of tax	0	6
Net change, Before tax	-55	-11
Net change, Tax effect	-11	-3
Net change, Net of tax	-66	-14
Other comprehensive income, before tax	788	2,276
Other Comprehensive Income, Tax effect	-228	-831
Other comprehensive income, net of tax	560	1,445
Less: Other comprehensive income from noncontrolling interests, net of tax	301	79
Wells Fargo other comprehensive income, net of tax	259	1,366
Interest income [Member] | Loans [Member]
Derivatives and hedging activities:
Reclassification of net (gains) losses on cash flow hedges to net income, Before tax	-237	-124
Reclassification of net (gains) losses on cash flow hedges to net income, Tax effect	89	47
Reclassification of net (gains) losses on cash flow hedges to net income, Net of tax	-148	-77
Interest income [Member] | Investment securities [Member]
Investment securities:
Reclassification of net gains to net income, Before tax	-3	-15
Reclassification of net gains to net income, Tax effect	1	6
Reclassification of net gains to net income, Net of tax	-2	-9
Derivatives and hedging activities:
Reclassification of net (gains) losses on cash flow hedges to net income, Before tax	-1	0
Reclassification of net (gains) losses on cash flow hedges to net income, Tax effect	1	0
Reclassification of net (gains) losses on cash flow hedges to net income, Net of tax	0	0
Gain(Loss) on investments [Member] | Debt Securities [Member]
Investment securities:
Reclassification of net gains to net income, Before tax	-278	-83
Reclassification of net gains to net income, Tax effect	105	31
Reclassification of net gains to net income, Net of tax	-173	-52
Gain(Loss) on investments [Member] | Equity Securities [Member]
Investment securities:
Reclassification of net gains to net income, Before tax	-19	-296
Reclassification of net gains to net income, Tax effect	7	112
Reclassification of net gains to net income, Net of tax	-12	-184
Interest expense on long-term debt [Member]
Derivatives and hedging activities:
Reclassification of net (gains) losses on cash flow hedges to net income, Before tax	4	18
Reclassification of net (gains) losses on cash flow hedges to net income, Tax effect	-1	-7
Reclassification of net (gains) losses on cash flow hedges to net income, Net of tax	3	11
Noninterest income [Member]
Foreign currency translation adjustments:
Reclassification of net losses to net income, Before tax	0	6
Reclassification of net losses to net income, Tax effect	0	0
Reclassification of net losses to net income, Net of tax	$0	$6

Other_Comprehensive_Income_Cum

Other Comprehensive Income, Cumulative OCI Balances (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Investment securities:
Cumulative other comprehensive income, Investment securities, beginning of period	$4,926	$2,338
Net unrealized gains (losses) arising during the period	346	1,732
Amounts reclassified from accumulated other comprehensive income	-187	-245
Net change, Net of tax	159	1,487
Less: Other comprehensive income from noncontrolling interests	301	79
Cumulative other comprehensive income, Investment securities, end of period	4,784	3,746
Derivatives and hedging activities:
Cumulative other comprehensive income, Derivatives and hedging activities, beginning of period	333	80
Net unrealized gains (losses) arising during the period	593	27
Amounts reclassified from accumulated other comprehensive income	-145	-66
Net change, Net of tax	448	-39
Less: Other comprehensive income from noncontrolling interests	0	0
Cumulative other comprehensive income, Derivatives and hedging activities, end of period	781	41
Defined benefit plans adjustments:
Cumulative other comprehensive loss, Defined benefit plans adjustment, beginning of period	-1,703	-1,053
Net unrealized gains (losses) arising during the period	-7	0
Amounts reclassified from accumulated other comprehensive income	26	11
Net change, Net of tax	19	11
Less: Other comprehensive income from noncontrolling interests	0	0
Cumulative other comprehensive loss, Defined benefit plans adjustment, end of period	-1,684	-1,042
Foreign currency translation adjustments:
Cumulative other comprehensive income (loss), Foreign currency translation adjustments, beginning of period	-38	21
Net unrealized gains (losses) arising during the period	-66	-20
Amounts reclassified from accumulated other comprehensive income	0	6
Net change, Net of tax	-66	-14
Less: Other comprehensive income from noncontrolling interests	0	0
Cumulative other comprehensive income (loss), Foreign currency translation adjustments, end of period	-104	7
Cumulative other comprehensive income, beginning of period	3,518	1,386
Net unrealized gains (losses) arising during the period	866	1,739
Amounts reclassified from accumulated other comprehensive income	-306	-294
Other comprehensive income, net of tax	560	1,445
Less: Other comprehensive income from noncontrolling interests, net of tax	301	79
Cumulative other comprehensive income, end of period	$3,777	$2,752

Operating_Segments_Details

Operating Segments (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
	segment
Segment Reporting Information [Line Items]
Number of reportable operating segments	3
Financial Information of Operating Segment [Abstract]
Net interest income	$10,986,000,000	$10,615,000,000
Provision (reversal of provision) for credit losses	608,000,000	325,000,000
Noninterest income	10,292,000,000	10,010,000,000
Noninterest expense	12,507,000,000	11,948,000,000
Income before income tax expense	8,163,000,000	8,352,000,000
Income tax expense (benefit)	2,279,000,000	2,277,000,000
Net income before noncontrolling interests	5,884,000,000	6,075,000,000
Less: Net income from noncontrolling interests	80,000,000	182,000,000
Wells Fargo net income	5,804,000,000	5,893,000,000
Average loans	863,300,000,000	823,800,000,000
Average assets	1,707,800,000,000	1,525,900,000,000
Average core deposits	1,063,200,000,000	973,800,000,000
Other [Member]
Financial Information of Operating Segment [Abstract]
Net interest income	-357,000,000	-319,000,000
Provision (reversal of provision) for credit losses	0	7,000,000
Noninterest income	-794,000,000	-697,000,000
Noninterest expense	-797,000,000	-752,000,000
Income before income tax expense	-354,000,000	-271,000,000
Income tax expense (benefit)	-135,000,000	-103,000,000
Net income before noncontrolling interests	-219,000,000	-168,000,000
Less: Net income from noncontrolling interests	0	0
Wells Fargo net income	-219,000,000	-168,000,000
Average loans	-37,600,000,000	-33,100,000,000
Average assets	-75,900,000,000	-74,700,000,000
Average core deposits	-70,500,000,000	-67,700,000,000
Community Banking [Member]
Financial Information of Operating Segment [Abstract]
Net interest income	7,561,000,000	7,275,000,000
Provision (reversal of provision) for credit losses	617,000,000	419,000,000
Noninterest income	5,223,000,000	5,318,000,000
Noninterest expense	7,064,000,000	6,774,000,000
Income before income tax expense	5,103,000,000	5,400,000,000
Income tax expense (benefit)	1,364,000,000	1,376,000,000
Net income before noncontrolling interests	3,739,000,000	4,024,000,000
Less: Net income from noncontrolling interests	74,000,000	180,000,000
Wells Fargo net income	3,665,000,000	3,844,000,000
Average loans	506,400,000,000	505,000,000,000
Average assets	993,100,000,000	892,600,000,000
Average core deposits	668,900,000,000	626,500,000,000
Wholesale Banking [Member]
Financial Information of Operating Segment [Abstract]
Net interest income	2,921,000,000	2,891,000,000
Provision (reversal of provision) for credit losses	-6,000,000	-93,000,000
Noninterest income	2,991,000,000	2,689,000,000
Noninterest expense	3,409,000,000	3,215,000,000
Income before income tax expense	2,509,000,000	2,458,000,000
Income tax expense (benefit)	706,000,000	714,000,000
Net income before noncontrolling interests	1,803,000,000	1,744,000,000
Less: Net income from noncontrolling interests	6,000,000	2,000,000
Wells Fargo net income	1,797,000,000	1,742,000,000
Average loans	337,600,000,000	301,900,000,000
Average assets	594,900,000,000	517,400,000,000
Average core deposits	303,400,000,000	259,000,000,000
Wealth, Brokerage And Retirement [Member]
Financial Information of Operating Segment [Abstract]
Net interest income	861,000,000	768,000,000
Provision (reversal of provision) for credit losses	-3,000,000	-8,000,000
Noninterest income	2,872,000,000	2,700,000,000
Noninterest expense	2,831,000,000	2,711,000,000
Income before income tax expense	905,000,000	765,000,000
Income tax expense (benefit)	344,000,000	290,000,000
Net income before noncontrolling interests	561,000,000	475,000,000
Less: Net income from noncontrolling interests	0	0
Wells Fargo net income	561,000,000	475,000,000
Average loans	56,900,000,000	50,000,000,000
Average assets	195,700,000,000	190,600,000,000
Average core deposits	$161,400,000,000	$156,000,000,000

Regulatory_and_Agency_Capital_2

Regulatory and Agency Capital Requirements (Details) (USD $)	3 Months Ended	12 Months Ended
In Billions, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Regulatory capital ratios:
Tier 1 common equity ratio required to be well capitalized	6.50%
Tier 1 common equity ratio required for capital adequacy purposes	4.50%
Tier 1 capital ratio required to be well capitalized	8.00%
Total capital ratio required to be well capitalized	10.00%
Tier 1 leverage capital ratio required to be well capitalized	5.00%
Tier 1 capital ratio required for capital adequacy purposes	6.00%
Total capital ratio required for capital adequacy purposes	8.00%
Tier 1 leverage capital ratio required for capital adequacy purposes	4.00%
Regulatory and Agency Capital Requirements (Textual) [Abstract]
Minimum leverage ratio for banking organizations	3.00%
Wells Fargo & Company [Member]
Regulatory capital:
Common equity tier 1	$139.20	$137.10
Tier 1	158.8	154.7
Total	196.2	192.9
Assets:
Risk-weighted	1,301.50	1,242.50
Adjusted average	1,675.70	1,637
Regulatory capital ratios:
Common equity tier 1 capital	10.69%	11.04%
Tier 1 capital	12.20%	12.45%
Total capital	15.08%	15.53%
Tier 1 leverage	9.48%	9.45%
Wells Fargo Bank, NA [Member]
Regulatory capital:
Common equity tier 1	121.1	119.9
Tier 1	121.1	119.9
Total	144.9	144
Assets:
Risk-weighted	1,177.70	1,142.50
Adjusted average	$1,523	$1,487.60
Regulatory capital ratios:
Common equity tier 1 capital	10.28%	10.49%
Tier 1 capital	10.28%	10.49%
Total capital	12.31%	12.61%
Tier 1 leverage	7.95%	8.06%