Bank of America (BAC) 10-K 22 Feb 18 2017 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2017	Feb. 21, 2018	Jun. 30, 2017
Document and Entity Information [Abstract]
Entity Registrant Name	BANK OF AMERICA CORP /DE/
Entity Central Index Key	70,858
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-K
Document Period End Date	Dec. 31, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	FY
Amendment Flag	false
Entity Common Stock, Shares Outstanding		10,243,688,896
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float			$ 239,643,149,085

Consolidated Statement of Incom

Consolidated Statement of Income - USD ($) shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Interest income
Loans and leases	$ 36,221	$ 33,228	$ 31,918
Debt securities	10,471	9,167	9,178
Federal funds sold and securities borrowed or purchased under agreements to resell	2,390	1,118	988
Trading account assets	4,474	4,423	4,397
Other interest income	4,023	3,121	3,026
Total interest income	57,579	51,057	49,507
Interest expense
Deposits	1,931	1,015	861
Short-term borrowings	3,538	2,350	2,387
Trading account liabilities	1,204	1,018	1,343
Long-term debt	6,239	5,578	5,958
Total interest expense	12,912	9,961	10,549
Net interest income	44,667	41,096	38,958
Noninterest income
Card income	5,902	5,851	5,959
Service charges	7,818	7,638	7,381
Investment and brokerage services	13,281	12,745	13,337
Investment banking income	6,011	5,241	5,572
Trading account profits	7,277	6,902	6,473
Mortgage banking income	224	1,853	2,364
Gains on sales of debt securities	255	490	1,138
Other income	1,917	1,885	1,783
Total noninterest income	42,685	42,605	44,007
Total revenue, net of interest expense	87,352	83,701	82,965
Provision for credit losses	3,396	3,597	3,161
Noninterest expense
Personnel	31,642	31,748	32,751
Occupancy	4,009	4,038	4,093
Equipment	1,692	1,804	2,039
Marketing	1,746	1,703	1,811
Professional fees	1,888	1,971	2,264
Data processing	3,139	3,007	3,115
Telecommunications	699	746	823
Other general operating	9,928	10,066	10,721
Total noninterest expense	54,743	55,083	57,617
Income before income taxes	29,213	25,021	22,187
Income tax expense	10,981	7,199	6,277
Net income	18,232	17,822	15,910
Preferred stock dividends	1,614	1,682	1,483
Net income applicable to common shareholders	$ 16,618	$ 16,140	$ 14,427
Per common share information
Earnings (in dollars per share)	$ 1.63	$ 1.57	$ 1.38
Diluted earnings (in dollars per share)	1.56	1.49	1.31
Dividends paid (in dollars per share)	$ 0.390	$ 0.25	$ 0.20
Average common shares issued and outstanding (in thousands) (in shares)	10,195,646	10,284,147	10,462,282
Average diluted common shares issued and outstanding (in thousands) (in shares)	10,778,428	11,046,806	11,236,230

Consolidated Statement of Compr

Consolidated Statement of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Statement of Comprehensive Income [Abstract]
Net income	$ 18,232	$ 17,822	$ 15,910
Other comprehensive income (loss), net-of-tax:
Net change in debt and marketable equity securities	61	(1,345)	(1,580)
Net change in debit valuation adjustments	(293)	(156)	615
Net change in derivatives	64	182	584
Employee benefit plan adjustments	288	(524)	394
Net change in foreign currency translation adjustments	86	(87)	(123)
Other comprehensive income (loss)	206	(1,930)	(110)
Comprehensive income	$ 18,438	$ 15,892	$ 15,800

Consolidated Balance Sheet

Consolidated Balance Sheet - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Assets
Cash and due from banks	$ 29,480	$ 30,719
Interest-bearing deposits with the Federal Reserve, non-U.S. central banks and other banks	127,954	117,019
Cash and cash equivalents	157,434	147,738
Time deposits placed and other short-term investments	11,153	9,861
Federal funds sold and securities borrowed or purchased under agreements to resell (includes $52,906 and $49,750 measured at fair value)	212,747	198,224
Trading account assets (includes $106,274 and $106,057 pledged as collateral)	209,358	180,209
Derivative assets	37,762	42,512
Debt securities:
Carried at fair value (includes $29,830 and $29,804 pledged as collateral)	315,117	313,660
Held-to-maturity, at cost (fair value – $123,299 and $115,285; $6,007 and $8,233 pledged as collateral)	125,013	117,071
Total debt securities	440,130	430,731
Loans and leases	936,749	906,683
Allowance for loan and lease losses	(10,393)	(11,237)
Loans and leases, net of allowance	926,356	895,446
Premises and equipment, net	9,247	9,139
Mortgage servicing rights	2,302	2,747
Goodwill	68,951	68,969
Loans held-for-sale (includes $2,156 and $4,026 measured at fair value)	11,430	9,066
Customer and other receivables	61,623	58,759
Assets of business held for sale (includes $619 measured at fair value at December 31, 2016)	0	10,670
Other assets (includes $20,279 and $13,802 measured at fair value)	132,741	123,996
Total assets	2,281,234	2,188,067
Deposits in U.S. offices:
Noninterest-bearing	430,650	438,125
Interest-bearing (includes $449 and $731 measured at fair value)	796,576	750,891
Deposits in non-U.S. offices:
Noninterest-bearing	14,024	12,039
Interest-bearing	68,295	59,879
Total deposits	1,309,545	1,260,934
Federal funds purchased and securities loaned or sold under agreements to repurchase (includes $36,182 and $35,766 measured at fair value)	176,865	170,291
Trading account liabilities	81,187	63,031
Derivative liabilities	34,300	39,480
Short-term borrowings (includes $1,494 and $2,024 measured at fair value)	32,666	23,944
Accrued expenses and other liabilities (includes $22,840 and $14,630 measured at fair value and $777 and $762 of reserve for unfunded lending commitments)	152,123	147,369
Long-term debt (includes $31,786 and $30,037 measured at fair value)	227,402	216,823
Total liabilities	2,014,088	1,921,872
Commitments and contingencies (Note 6 – Securitizations and Other Variable Interest Entities, Note 7 – Representations and Warranties Obligations and Corporate Guarantees and Note 10 – Commitments and Contingencies)
Shareholders’ equity
Preferred stock, $0.01 par value; authorized – 100,000,000 shares; issued and outstanding – 3,837,683 and 3,887,329 shares	22,323	25,220
Common stock and additional paid-in capital, $0.01 par value; authorized – 12,800,000,000 shares; issued and outstanding – 10,287,302,431 and 10,052,625,604 shares	138,089	147,038
Retained earnings	113,816	101,225
Accumulated other comprehensive income (loss)	(7,082)	(7,288)
Total shareholders’ equity	267,146	266,195
Total liabilities and shareholders’ equity	2,281,234	2,188,067
Consolidated VIEs
Assets
Trading account assets (includes $106,274 and $106,057 pledged as collateral)	6,521	5,773
Debt securities:
Loans and leases	48,929	56,001
Allowance for loan and lease losses	(1,016)	(1,032)
Loans and leases, net of allowance	47,913	54,969
Loans held-for-sale (includes $2,156 and $4,026 measured at fair value)	27	188
Other assets (includes $20,279 and $13,802 measured at fair value)	1,694	1,596
Total assets	56,155	62,526
Deposits in non-U.S. offices:
Short-term borrowings (includes $1,494 and $2,024 measured at fair value)	312	348
Long-term debt (includes $31,786 and $30,037 measured at fair value)	9,873	10,646
All other liabilities (includes $34 and $38 of non-recourse liabilities)	37	41
Total liabilities	$ 10,222	$ 11,035

Consolidated Balance Sheet (Par

Consolidated Balance Sheet (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Assets
Federal funds sold and securities borrowed or purchased under agreements to resell measured at fair value	$ 52,906	$ 49,750
Trading account assets, pledged as collateral	106,274	106,057
Debt securities:
Carried at fair value, pledged as collateral	29,830	29,804
Held-to-maturity, fair value	123,299	115,285
Held-to-maturity, pledged as collateral	6,007	8,233
Loans and leases, measured at fair value	5,710	7,085
Loans and leases, pledged as collateral	40,051	31,805
Loans held-for-sale, measured at fair value	2,156	4,026
Assets of business held-for-sale at fair value		619
Other assets, measured at fair value	20,279	13,802
Deposits in U.S. offices:
Interest-bearing, measured at fair value	449	731
Federal funds purchased and securities loaned or sold under agreements to repurchase, measured at fair value	36,182	35,766
Short-term borrowings, measured at fair value	1,494	2,024
Accrued expenses and other liabilities, measured at fair value	22,840	14,630
Accrued expenses and other liabilities, reserve for unfunded lending commitments	777	762
Long-term debt, measured at fair value	$ 31,786	$ 30,037
Shareholders’ equity
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock authorized (in shares)	100,000,000	100,000,000
Preferred stock issued (in shares)	3,837,683	3,887,329
Preferred stock outstanding (in shares)	3,837,683	3,887,329
Common stock par value (in dollars per share)	$ 0.01	$ 0.01
Common stock authorized (in shares)	12,800,000,000	12,800,000,000
Common stock issued (in shares)	10,287,302,431	10,052,625,604
Common stock outstanding (in shares)	10,287,302,431	10,052,625,604
Consolidated VIEs | Long-term debt
Shareholders’ equity
Non-recourse debt	$ 9,872	$ 10,417
Consolidated VIEs | Other liabilities
Shareholders’ equity
Non-recourse debt	$ 34	$ 38

Consolidated Statement of Chang

Consolidated Statement of Changes in Shareholders' Equity - USD ($) shares in Thousands, $ in Millions	Total	Preferred Stock	Common Stock and Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative adjustment for accounting change					$ (1,226)
Cumulative adjustment for accounting change | FASB Statement No. 123	$ (635)			$ (635)
Cumulative adjustment for accounting change | Accounting Standards Update 2016-01	0			1,226	(1,226)
Beginning Balance at Dec. 31, 2014	243,476	$ 19,309	$ 153,458	74,731	(4,022)
Beginning Balance (in shares) at Dec. 31, 2014			10,516,542
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	15,910			15,910
Net change in debt and marketable equity securities	(1,580)				(1,580)
Net change in debit valuation adjustments	615				615
Net change in derivatives	584				584
Employee benefit plan adjustments	394				394
Net change in foreign currency translation adjustments	(123)				(123)
Dividends declared:
Common	(2,091)			(2,091)
Preferred	(1,483)			(1,483)
Issuance of preferred stock	2,964	2,964
Common stock issued under employee plans, net (in shares)			4,054
Common stock issued under employee plans, net	(42)		$ (42)
Common stock repurchased (in shares)			(140,331)
Common stock repurchased	(2,374)		$ (2,374)
Ending Balance at Dec. 31, 2015	255,615	22,273	$ 151,042	87,658	(5,358)
Ending Balance (in shares) at Dec. 31, 2015			10,380,265
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	17,822			17,822
Net change in debt and marketable equity securities	(1,345)				(1,345)
Net change in debit valuation adjustments	(156)				(156)
Net change in derivatives	182				182
Employee benefit plan adjustments	(524)				(524)
Net change in foreign currency translation adjustments	(87)				(87)
Dividends declared:
Common	(2,573)			(2,573)
Preferred	(1,682)			(1,682)
Issuance of preferred stock	2,947	2,947
Common stock issued under employee plans, net (in shares)			5,111
Common stock issued under employee plans, net	1,108		$ 1,108
Common stock repurchased (in shares)			(332,750)
Common stock repurchased	(5,112)		$ (5,112)
Ending Balance at Dec. 31, 2016	266,195	25,220	$ 147,038	101,225	(7,288)
Ending Balance (in shares) at Dec. 31, 2016			10,052,626
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	18,232			18,232
Net change in debt and marketable equity securities	61				61
Net change in debit valuation adjustments	(293)				(293)
Net change in derivatives	64				64
Employee benefit plan adjustments	288				288
Net change in foreign currency translation adjustments	86				86
Dividends declared:
Common	(4,027)			(4,027)
Preferred	(1,578)			(1,578)
Common stock issued in connection with exercise of warrants and exchange of preferred stock	0	(2,897)	$ 2,933	(36)
Common stock issued in connection with exercise of warrants and exchange of preferred stock (in shares)			700,000
Common stock issued under employee plans, net (in shares)			43,329
Common stock issued under employee plans, net	932		$ 932
Common stock repurchased (in shares)			(508,653)
Common stock repurchased	(12,814)		$ (12,814)
Ending Balance at Dec. 31, 2017	$ 267,146	$ 22,323	$ 138,089	$ 113,816	$ (7,082)
Ending Balance (in shares) at Dec. 31, 2017			10,287,302

Consolidated Statement of Cash

Consolidated Statement of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Operating activities
Net income	$ 18,232	$ 17,822	$ 15,910
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses	3,396	3,597	3,161
Gains on sales of debt securities	(255)	(490)	(1,138)
Depreciation and premises improvements amortization	1,482	1,511	1,555
Amortization of intangibles	621	730	834
Net amortization of premium/discount on debt securities	2,251	3,134	2,613
Deferred income taxes	8,175	5,793	2,967
Stock-based compensation	1,649	1,367	(89)
Loans held-for-sale:
Originations and purchases	(43,506)	(33,107)	(37,933)
Proceeds from sales and paydowns of loans originally classified as held-for-sale	40,059	31,376	36,204
Net change in:
Trading and derivative instruments	(13,939)	(866)	2,550
Other assets	(19,859)	(13,802)	2,645
Accrued expenses and other liabilities	4,673	(35)	730
Other operating activities, net	7,424	1,331	(1,612)
Net cash provided by operating activities	10,403	18,361	28,397
Net change in:
Time deposits placed and other short-term investments	(1,292)	(2,117)	50
Federal funds sold and securities borrowed or purchased under agreements to resell	(14,523)	(5,742)	(659)
Debt securities carried at fair value:
Proceeds from sales	73,353	71,547	137,569
Proceeds from paydowns and maturities	93,874	108,592	92,498
Purchases	(166,975)	(189,061)	(219,412)
Held-to-maturity debt securities:
Proceeds from paydowns and maturities	16,653	18,677	12,872
Purchases	(25,088)	(39,899)	(36,575)
Loans and leases:
Proceeds from sales	11,761	18,230	22,316
Purchases	(6,846)	(12,283)	(12,629)
Other changes in loans and leases, net	(41,104)	(31,194)	(51,895)
Other investing activities, net	8,180	107	294
Net cash used in investing activities	(52,007)	(63,143)	(55,571)
Net change in:
Deposits	48,611	63,675	78,347
Federal funds purchased and securities loaned or sold under agreements to repurchase	7,024	(4,000)	(26,986)
Short-term borrowings	8,538	(4,014)	(3,074)
Long-term debt:
Proceeds from issuance	53,486	35,537	43,670
Retirement of long-term debt	(49,553)	(51,849)	(40,365)
Preferred stock: Proceeds from issuance	0	2,947	2,964
Common stock repurchased	(12,814)	(5,112)	(2,374)
Cash dividends paid	(5,700)	(4,194)	(3,574)
Other financing activities, net	(397)	(63)	(73)
Net cash provided by financing activities	49,195	32,927	48,535
Effect of exchange rate changes on cash and cash equivalents	2,105	240	(597)
Net increase (decrease) in cash and cash equivalents	9,696	(11,615)	20,764
Cash and cash equivalents at January 1	147,738	159,353	138,589
Cash and cash equivalents at December 31	157,434	147,738	159,353
Supplemental cash flow disclosures
Interest paid	12,852	10,510	10,623
Income taxes paid	3,297	1,633	2,326
Income taxes refunded	$ (62)	$ (590)	$ (151)

Summary of Significant Accounti

Summary of Significant Accounting Principles	12 Months Ended
	Dec. 31, 2017
Accounting Policies [Abstract]
Summary of Significant Accounting Principles	Summary of Significant Accounting Principles Bank of America Corporation, a bank holding company and a financial holding company, provides a diverse range of financial services and products throughout the U.S. and in certain international markets. The term “the Corporation” as used herein may refer to Bank of America Corporation, individually, Bank of America Corporation and its subsidiaries, or certain of Bank of America Corporation’s subsidiaries or affiliates. Principles of Consolidation and Basis of Presentation The Consolidated Financial Statements include the accounts of the Corporation and its majority-owned subsidiaries and those variable interest entities (VIEs) where the Corporation is the primary beneficiary. Intercompany accounts and transactions have been eliminated. Results of operations of acquired companies are included from the dates of acquisition and for VIEs, from the dates that the Corporation became the primary beneficiary. Assets held in an agency or fiduciary capacity are not included in the Consolidated Financial Statements. The Corporation accounts for investments in companies for which it owns a voting interest and for which it has the ability to exercise significant influence over operating and financing decisions using the equity method of accounting. These investments are included in other assets. Equity method investments are subject to impairment testing, and the Corporation’s proportionate share of income or loss is included in other income. The preparation of the Consolidated Financial Statements in conformity with accounting principles generally accepted in the United States of America (GAAP) requires management to make estimates and assumptions that affect reported amounts and disclosures. Realized results could materially differ from those estimates and assumptions. Certain prior-period amounts have been reclassified to conform to current period presentation. On June 1, 2017, the Corporation completed the sale of its non-U.S. consumer credit card business to a third party. The Corporation has indemnified the purchaser for substantially all payment protection insurance (PPI) exposure above reserves assumed by the purchaser. The impact of the sale was an after-tax gain of $103 million , and is presented in the Consolidated Statement of Income as other income of $793 million and an income tax expense of $690 million . The income tax expense was related to gains on the derivatives used to hedge the currency risk of the net investment. Total cash proceeds from the sale were $10.9 billion . The assets of the business sold primarily included consumer credit card receivables of $9.8 billion and $9.2 billion at June 1, 2017 and December 31, 2016 and goodwill of $775 million at both of those period ends. This business was included in All Other . Change in Tax Law On December 22, 2017, the President signed into law the Tax Cuts and Jobs Act (the Tax Act) which made significant changes to federal income tax law including, among other things, reducing the statutory corporate income tax rate to 21 percent from 35 percent and changing the taxation of the Corporation’s non-U.S. business activities. On the same date, the Securities and Exchange Commission issued Staff Accounting Bulletin No. 118 which specifies, among other things, that reasonable estimates of the income tax effects of the Tax Act should be used, if determinable. The Corporation has accounted for the effects of the Tax Act using reasonable estimates based on currently available information and its interpretations thereof. This accounting may change due to, among other things, changes in interpretations the Corporation has made and the issuance of new tax or accounting guidance. GAAP requires that the effects of a change in tax rate from revaluing deferred tax assets and deferred tax liabilities be recognized upon enactment, resulting in $ 1.9 billion of estimated incremental income tax expense recognized in 2017. The change in tax rate also resulted in a downward valuation adjustment, primarily related to tax-advantaged energy investments, of $ 946 million recorded in other income. Change in Accounting Method GAAP requires that stock-based compensation awards be expensed over the service period (the period they are earned), based on their grant-date fair value. Awards to retirement-eligible employees have no future service requirement, and historically, the Corporation has deemed these awards to be authorized on the grant date, resulting in full recognition of the related expense at that time. Effective October 1, 2017, the Corporation changed its accounting method for determining when these awards are deemed authorized, changing from the grant date to the beginning of the year preceding the grant date when the incentive award plans are generally approved. As a result, the estimated value of the awards is now expensed ratably over the year preceding the grant date. The Corporation believes this change is a preferable method of accounting as it is consistent with the accounting method used by several peer institutions for similar awards and results in an improved pattern of expense recognition. Adoption of this change is voluntary and has been adopted retrospectively with all prior periods presented herein being restated. The change in accounting method resulted in a decrease in retained earnings of $ 635 million at January 1, 2015. All other effects of the change on the Consolidated Statement of Income and diluted earnings per share were not material for any period presented; additionally, the impact of the change in accounting method was not material to any interim periods. The change affected consolidated financial information and All Other ; it did not affect the business segments. The following Notes have been impacted by the change in accounting method: Note 13 – Shareholders’ Equity , Note 15 – Earnings Per Common Share , Note 16 – Regulatory Requirements and Restrictions and Note 18 – Stock-based Compensation Plans . New Accounting Pronouncements Accounting for Share-based Compensation Effective January 1, 2017, the Corporation adopted the new accounting standard that simplifies certain aspects of the accounting for share-based payment transactions, including income tax consequences, classification of awards as either equity or liabilities and classification on the statement of cash flows. Under this new accounting standard, all excess tax benefits and tax deficiencies on the delivery of share-based awards are recognized as discrete items in income tax expense or benefit in the Consolidated Statement of Income. Previously such amounts were recorded in shareholders’ equity. The adoption of this new accounting standard resulted in $236 million of tax benefits upon the delivery of share-settled awards in 2017. Revenue Recognition Effective January 1, 2018, the Corporation adopted the new accounting standard for recognizing revenue from contracts with customers. The new standard does not impact the timing or measurement of the Corporation’s revenue recognition as it is consistent with the Corporation’s existing accounting for contracts within the scope of the new standard. However, beginning prospectively in 2018, the Corporation’s presentation of certain costs, which are primarily related to underwriting activities, will be presented as operating expenses under the new standard rather than presented net in investment banking income, resulting in an expected increase to both line items of approximately $ 200 million for the year. The new accounting standard does not have a material impact on the Corporation’s consolidated financial position or results of operations and will not have a material impact on the disclosures in the Notes to the Consolidated Financial Statements. Hedge Accounting Effective January 1, 2018, the Corporation early adopted the new standard that simplifies and expands the ability to apply hedge accounting to certain risk management activities. The accounting standard does not have a material impact on the Corporation’s consolidated financial position or results of operations and will not have a material impact on the disclosures in the Notes to the Consolidated Financial Statements. The Corporation recognized an insignificant cumulative-effect adjustment to its January 1, 2018 opening retained earnings to reflect the impact of applying the new standard to certain outstanding hedge strategies, mainly related to fair value hedges of fixed-rate debt instruments. Recognition and Measurement of Financial Assets and Financial Liabilities The Financial Accounting Standards Board (FASB) issued a new accounting standard on recognition and measurement of financial instruments, including certain equity investments and financial liabilities recorded at fair value under the fair value option. Effective January 1, 2015, the Corporation early adopted the provisions related to debit valuation adjustments (DVA) on financial liabilities accounted for under the fair value option. The Corporation adopted the remaining provisions on January 1, 2018, which will not have a material impact on the Corporation’s consolidated financial position, results of operations or disclosures in the Notes to the Consolidated Financial Statements. Tax Effects in Accumulated Other Comprehensive Income The FASB issued a new accounting standard effective on January 1, 2019, with early adoption permitted, that addresses certain tax effects in accumulated other comprehensive income (OCI) related to the Tax Act. Under this new accounting standard, those tax effects, representing the difference between the newly enacted federal tax rate of 21 percent and the historical tax rate, may, at the entity’s election, be reclassified from accumulated OCI to retained earnings. The new accounting standard can be applied retrospectively to each period in which the effects of the change in federal tax rate are recognized or applied at the beginning of the period of adoption. The new accounting standard will not have a material impact on the Corporation’s consolidated financial position, results of operations or disclosures in the Notes to the Consolidated Financial Statements. Lease Accounting The FASB issued a new accounting standard effective on January 1, 2019 that requires substantially all leases to be recorded as assets and liabilities on the balance sheet. On January 5, 2018, the FASB issued an exposure draft proposing an amendment to the standard that, if approved, would permit companies the option to apply the provisions of the new lease standard either prospectively as of the effective date, without adjusting comparative periods presented, or using a modified retrospective transition applicable to all prior periods presented. The Corporation is in the process of reviewing its existing lease portfolios, including certain service contracts for embedded leases, to evaluate the impact of the standard on the consolidated financial statements, as well as the impact to regulatory capital and risk-weighted assets. The effect of the adoption will depend on the lease portfolio at the time of transition and the transition options ultimately available; however, the Corporation does not expect the new accounting standard to have a material impact on its consolidated financial position, results of operations or disclosures in the Notes to the Consolidated Financial Statements. Accounting for Financial Instruments -- Credit Losses The FASB issued a new accounting standard effective on January 1, 2020, with early adoption permitted on January 1, 2019, that will require the earlier recognition of credit losses on loans and other financial instruments based on an expected loss model, replacing the incurred loss model that is currently in use. The standard also requires expanded credit quality disclosures, including credit quality indicators disaggregated by vintage. The Corporation is in the process of identifying and implementing required changes to loan loss estimation models and processes and evaluating the impact of this new accounting standard, which at the date of adoption is expected to increase the allowance for credit losses with a resulting negative adjustment to retained earnings. Significant Accounting Principles Cash and Cash Equivalents Cash and cash equivalents include cash on hand, cash items in the process of collection, cash segregated under federal and other brokerage regulations, and amounts due from correspondent banks, the Federal Reserve Bank and certain non-U.S. central banks. Securities Financing Agreements Securities borrowed or purchased under agreements to resell and securities loaned or sold under agreements to repurchase (securities financing agreements) are treated as collateralized financing transactions except in instances where the transaction is required to be accounted for as individual sale and purchase transactions. Generally, these agreements are recorded at acquisition or sale price plus accrued interest, except for certain securities financing agreements that the Corporation accounts for under the fair value option. Changes in the fair value of securities financing agreements that are accounted for under the fair value option are recorded in trading account profits in the Consolidated Statement of Income. The Corporation’s policy is to monitor the market value of the principal amount loaned under resale agreements and obtain collateral from or return collateral pledged to counterparties when appropriate. Securities financing agreements do not create material credit risk due to these collateral provisions; therefore, an allowance for loan losses is unnecessary. In transactions where the Corporation acts as the lender in a securities lending agreement and receives securities that can be pledged or sold as collateral, it recognizes an asset on the Consolidated Balance Sheet at fair value, representing the securities received, and a liability, representing the obligation to return those securities. Collateral The Corporation accepts securities and loans as collateral that it is permitted by contract or practice to sell or repledge. At December 31, 2017 and 2016 , the fair value of this collateral was $561.9 billion and $452.1 billion , of which $476.1 billion and $372.0 billion was sold or repledged. The primary source of this collateral is securities borrowed or purchased under agreements to resell. The Corporation also pledges company-owned securities and loans as collateral in transactions that include repurchase agreements, securities loaned, public and trust deposits, U.S. Treasury tax and loan notes, and short-term borrowings. This collateral, which in some cases can be sold or repledged by the counterparties to the transactions, is parenthetically disclosed on the Consolidated Balance Sheet. In certain cases, the Corporation has transferred assets to consolidated VIEs where those restricted assets serve as collateral for the interests issued by the VIEs. These assets are included on the Consolidated Balance Sheet in Assets of Consolidated VIEs. In addition, the Corporation obtains collateral in connection with its derivative contracts. Required collateral levels vary depending on the credit risk rating and the type of counterparty. Generally, the Corporation accepts collateral in the form of cash, U.S. Treasury securities and other marketable securities. Based on provisions contained in master netting agreements, the Corporation nets cash collateral received against derivative assets. The Corporation also pledges collateral on its own derivative positions which can be applied against derivative liabilities. Trading Instruments Financial instruments utilized in trading activities are carried at fair value. Fair value is generally based on quoted market prices or quoted market prices for similar assets and liabilities. If these market prices are not available, fair values are estimated based on dealer quotes, pricing models, discounted cash flow methodologies, or similar techniques where the determination of fair value may require significant management judgment or estimation. Realized gains and losses are recorded on a trade-date basis. Realized and unrealized gains and losses are recognized in trading account profits. Derivatives and Hedging Activities Derivatives are entered into on behalf of customers, for trading or to support risk management activities. Derivatives used in risk management activities include derivatives that are both designated in qualifying accounting hedge relationships and derivatives used to hedge market risks in relationships that are not designated in qualifying accounting hedge relationships (referred to as other risk management activities). The Corporation manages interest rate and foreign currency exchange rate sensitivity predominantly through the use of derivatives. Derivatives utilized by the Corporation include swaps, futures and forward settlement contracts, and option contracts. All derivatives are recorded on the Consolidated Balance Sheet at fair value, taking into consideration the effects of legally enforceable master netting agreements that allow the Corporation to settle positive and negative positions and offset cash collateral held with the same counterparty on a net basis. For exchange-traded contracts, fair value is based on quoted market prices in active or inactive markets or is derived from observable market- based pricing parameters, similar to those applied to over-the-counter (OTC) derivatives. For non-exchange traded contracts, fair value is based on dealer quotes, pricing models, discounted cash flow methodologies or similar techniques for which the determination of fair value may require significant management judgment or estimation. Valuations of derivative assets and liabilities reflect the value of the instrument including counterparty credit risk. These values also take into account the Corporation’s own credit standing. Trading Derivatives and Other Risk Management Activities Derivatives held for trading purposes are included in derivative assets or derivative liabilities on the Consolidated Balance Sheet with changes in fair value included in trading account profits. Derivatives used for other risk management activities are included in derivative assets or derivative liabilities. Derivatives used in other risk management activities have not been designated in qualifying accounting hedge relationships because they did not qualify or the risk that is being mitigated pertains to an item that is reported at fair value through earnings so that the effect of measuring the derivative instrument and the asset or liability to which the risk exposure pertains will offset in the Consolidated Statement of Income to the extent effective. The changes in the fair value of derivatives that serve to mitigate certain risks associated with mortgage servicing rights (MSRs), interest rate lock commitments (IRLCs) and first mortgage loans held-for-sale (LHFS) that are originated by the Corporation are recorded in mortgage banking income. Changes in the fair value of derivatives that serve to mitigate interest rate risk and foreign currency risk are included in other income. Credit derivatives are also used by the Corporation to mitigate the risk associated with various credit exposures. The changes in the fair value of these derivatives are included in other income. Derivatives Used For Hedge Accounting Purposes (Accounting Hedges) For accounting hedges, the Corporation formally documents at inception all relationships between hedging instruments and hedged items, as well as the risk management objectives and strategies for undertaking various accounting hedges. Additionally, the Corporation primarily uses regression analysis at the inception of a hedge and for each reporting period thereafter to assess whether the derivative used in an accounting hedge transaction is expected to be and has been highly effective in offsetting changes in the fair value or cash flows of a hedged item or forecasted transaction. The Corporation discontinues hedge accounting when it is determined that a derivative is not expected to be or has ceased to be highly effective as a hedge, and then reflects changes in fair value of the derivative in earnings after termination of the hedge relationship. Fair value hedges are used to protect against changes in the fair value of the Corporation’s assets and liabilities that are attributable to interest rate or foreign exchange volatility. Changes in the fair value of derivatives designated as fair value hedges are recorded in earnings, together and in the same income statement line item with changes in the fair value of the related hedged item. If a derivative instrument in a fair value hedge is terminated or the hedge designation removed, the previous adjustments to the carrying value of the hedged asset or liability are subsequently accounted for in the same manner as other components of the carrying value of that asset or liability. For interest-earning assets and interest-bearing liabilities, such adjustments are amortized to earnings over the remaining life of the respective asset or liability. Cash flow hedges are used primarily to minimize the variability in cash flows of assets and liabilities, or forecasted transactions caused by interest rate or foreign exchange rate fluctuations. Changes in the fair value of derivatives used in cash flow hedges are recorded in accumulated OCI and are reclassified into the line item in the income statement in which the hedged item is recorded in the same period the hedged item affects earnings. Hedge ineffectiveness and gains and losses on the component of a derivative excluded in assessing hedge effectiveness are recorded in the same income statement line item. Net investment hedges are used to manage the foreign exchange rate sensitivity arising from a net investment in a foreign operation. Changes in the fair value of derivatives designated as net investment hedges of foreign operations, to the extent effective, are recorded as a component of accumulated OCI. Securities Debt securities are reported on the Consolidated Balance Sheet at their trade date. Their classification is dependent on the purpose for which the assets were acquired. Debt securities purchased for use in the Corporation’s trading activities are reported in trading account assets at fair value with unrealized gains and losses included in trading account profits. Substantially all other debt securities purchased are used in the Corporation’s asset and liability management (ALM) activities and are reported on the Consolidated Balance Sheet as either debt securities carried at fair value or as debt securities held-to-maturity (HTM). Debt securities carried at fair value are either available-for-sale (AFS) securities with unrealized gains and losses net-of-tax included in accumulated OCI or carried at fair value with unrealized gains and losses reported in other income. Debt securities HTM, which are certain debt securities that management has the intent and ability to hold to maturity, are reported at amortized cost. The Corporation regularly evaluates each AFS and HTM debt security where the value has declined below amortized cost to assess whether the decline in fair value is other than temporary. In determining whether an impairment is other than temporary, the Corporation considers the severity and duration of the decline in fair value, the length of time expected for recovery, the financial condition of the issuer, and other qualitative factors, as well as whether the Corporation either plans to sell the security or it is more-likely-than-not that it will be required to sell the security before recovery of the amortized cost. For AFS debt securities the Corporation intends to hold, an analysis is performed to determine how much of the decline in fair value is related to the issuer’s credit and how much is related to market factors (e.g., interest rates). If any of the decline in fair value is due to credit, an other-than-temporary impairment (OTTI) loss is recognized in the Consolidated Statement of Income for that amount. If any of the decline in fair value is related to market factors, that amount is recognized in accumulated OCI. In certain instances, the credit loss may exceed the total decline in fair value, in which case, the difference is due to market factors and is recognized as an unrealized gain in accumulated OCI. If the Corporation intends to sell or believes it is more-likely-than-not that it will be required to sell the debt security, it is written down to fair value as an OTTI loss. Interest on debt securities, including amortization of premiums and accretion of discounts, is included in interest income. Premiums and discounts are amortized or accreted to interest income at a constant effective yield over the contractual lives of the securities. Realized gains and losses from the sales of debt securities are determined using the specific identification method. Marketable equity securities are classified based on management’s intention on the date of purchase and recorded on the Consolidated Balance Sheet as of the trade date. Marketable equity securities that are bought and held principally for the purpose of resale in the near term are classified as trading and are carried at fair value with unrealized gains and losses included in trading account profits. Other marketable equity securities are accounted for as AFS and classified in other assets. All AFS marketable equity securities are carried at fair value with net unrealized gains and losses included in accumulated OCI, net-of-tax. If there is an other-than-temporary decline in the fair value of any individual AFS marketable equity security, the cost basis is reduced and the Corporation reclassifies the associated net unrealized loss out of accumulated OCI with a corresponding charge to other income. Dividend income on AFS marketable equity securities is included in other income. Realized gains and losses on the sale of all AFS marketable equity securities, which are recorded in other income, are determined using the specific identification method. Loans and Leases Loans, with the exception of loans accounted for under the fair value option, are measured at historical cost and reported at their outstanding principal balances net of any unearned income, charge-offs, unamortized deferred fees and costs on originated loans, and for purchased loans, net of any unamortized premiums or discounts. Loan origination fees and certain direct origination costs are deferred and recognized as adjustments to interest income over the lives of the related loans. Unearned income, discounts and premiums are amortized to interest income using a level yield methodology. The Corporation elects to account for certain consumer and commercial loans under the fair value option with changes in fair value reported in other income. Under applicable accounting guidance, for reporting purposes, the loan and lease portfolio is categorized by portfolio segment and, within each portfolio segment, by class of financing receivables. A portfolio segment is defined as the level at which an entity develops and documents a systematic methodology to determine the allowance for credit losses, and a class of financing receivables is defined as the level of disaggregation of portfolio segments based on the initial measurement attribute, risk characteristics and methods for assessing risk. The Corporation’s three portfolio segments are Consumer Real Estate, Credit Card and Other Consumer, and Commercial. The classes within the Consumer Real Estate portfolio segment are residential mortgage and home equity . The classes within the Credit Card and Other Consumer portfolio segment are U.S. credit card, non-U.S. credit card (sold in 2017), direct/indirect consumer and other consumer. The classes within the Commercial portfolio segment are U.S. commercial, non-U.S. commercial, commercial real estate, commercial lease financing and U.S. small business commercial. Purchased Credit-impaired Loans Purchased loans with evidence of credit quality deterioration as of the purchase date for which it is probable that the Corporation will not receive all contractually required payments receivable are accounted for as purchased credit-impaired (PCI) loans. Evidence of credit quality deterioration since origination may include past due status, refreshed credit scores and refreshed loan-to-value (LTV) ratios. At acquisition, PCI loans are recorded at fair value with no allowance for credit losses, and accounted for individually or aggregated in pools based on similar risk characteristics such as credit risk, collateral type and interest rate risk. The Corporation estimates the amount and timing of expected cash flows for each loan or pool of loans. The expected cash flows in excess of the amount paid for the loans is referred to as the accretable yield and is recorded as interest income over the remaining estimated life of the loan or pool of loans. The excess of the PCI loans’ contractual principal and interest over the expected cash flows is referred to as the nonaccretable difference. Over the life of the PCI loans, the expected cash flows continue to be estimated using models that incorporate management’s estimate of current assumptions such as default rates, loss severity and prepayment speeds. If, upon subsequent valuation, the Corporation determines it is probable that the present value of the expected cash flows has decreased, a charge to the provision for credit losses is recorded with a corresponding increase in the allowance for credit losses. If it is probable that there is a significant increase in the present value of expected cash flows, the allowance for credit losses is reduced or, if there is no remaining allowance for credit losses related to these PCI loans, the accretable yield is increased through a reclassification from nonaccretable difference, resulting in a prospective increase in interest income. Reclassifications to or from nonaccretable difference can also occur for changes in the PCI loans’ estimated lives. If a loan within a PCI pool is sold, foreclosed, forgiven or the expectation of any future proceeds is remote, the loan is removed from the pool at its proportional carrying value. If the loan’s recovery value is less than the loan’s carrying value, the difference is first applied against the PCI pool’s nonaccretable difference and then against the allowance for credit losses. Leases The Corporation provides equipment financing to its customers through a variety of lease arrangements. Direct financing leases are carried at the aggregate of lease payments receivable plus estimated residual value of the leased property less unearned income. Leveraged leases, which are a form of financing leases, are reported net of non-recourse debt. Unearned income on leveraged and direct financing leases is accreted to interest income over the lease terms using methods that approximate the interest method. Allowance for Credit Losses The allowance for credit losses, which includes the allowance for loan and lease losses and the reserve for unfunded lending commitments, represents management’s estimate of probable losses inherent in the Corporation’s lending activities excluding loans and unfunded lending commitments accounted for under the fair value option. The allowance for loan and lease losses represents the estimated probable credit losses on funded consumer and commercial loans and leases while the reserve for unfunded lending commitments, including standby letters of credit (SBLCs) and binding unfunded loan commitments, represents estimated probable credit losses on these unfunded credit instruments based on utilization assumptions. Lending-related credit exposures deemed to be uncollectible, excluding loans carried at fair value, are charged off against these accounts. Write-offs on PCI loans on which there is a valuation allowance are recorded against the valuation allowance. For more information, see Purchased Credit-impaired Loans in this Note. The Corporation performs periodic and systematic detailed reviews of its lending portfolios to identify credit risks and to assess the overall collectability of those portfolios. The allowance on certain homogeneous consumer loan portfolios, which generally consist of consumer real estate loans within the Consumer Real Estate portfolio segment and credit card loans within the Credit Card and Other Consumer portfolio segment, is based on aggregated portfolio segment evaluations generally by product

Derivatives

Derivatives	12 Months Ended
	Dec. 31, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives	Derivatives Derivative Balances Derivatives are entered into on behalf of customers, for trading or to support risk management activities. Derivatives used in risk management activities include derivatives that may or may not be designated in qualifying hedge accounting relationships. Derivatives that are not designated in qualifying hedge accounting relationships are referred to as other risk management derivatives. For more information on the Corporation’s derivatives and hedging activities, see Note 1 – Summary of Significant Accounting Principles . The following tables present derivative instruments included on the Consolidated Balance Sheet in derivative assets and liabilities at December 31, 2017 and 2016 . Balances are presented on a gross basis, prior to the application of counterparty and cash collateral netting. Total derivative assets and liabilities are adjusted on an aggregate basis to take into consideration the effects of legally enforceable master netting agreements and have been reduced by the cash collateral received or paid. December 31, 2017 Gross Derivative Assets Gross Derivative Liabilities (Dollars in billions) Contract/ Notional (1) Trading and Other Risk Management Derivatives Qualifying Hedges Total Trading and Other Risk Management Derivatives Qualifying Hedges Total Interest rate contracts Swaps (2) $ 15,416.4 $ 175.1 $ 2.9 $ 178.0 $ 172.5 $ 1.7 $ 174.2 Futures and forwards (2) 4,332.4 0.5 — 0.5 0.5 — 0.5 Written options 1,170.5 — — — 35.5 — 35.5 Purchased options 1,184.5 37.6 — 37.6 — — — Foreign exchange contracts Swaps 2,011.1 35.6 2.2 37.8 36.1 2.7 38.8 Spot, futures and forwards 3,543.3 39.1 0.7 39.8 39.1 0.8 39.9 Written options 291.8 — — — 5.1 — 5.1 Purchased options 271.9 4.6 — 4.6 — — — Equity contracts Swaps 265.6 4.8 — 4.8 4.4 — 4.4 Futures and forwards 106.9 1.5 — 1.5 0.9 — 0.9 Written options 480.8 — — — 23.9 — 23.9 Purchased options 428.2 24.7 — 24.7 — — — Commodity contracts Swaps 46.1 1.8 — 1.8 4.6 — 4.6 Futures and forwards 47.1 3.5 — 3.5 0.6 — 0.6 Written options 21.7 — — — 1.4 — 1.4 Purchased options 22.9 1.4 — 1.4 — — — Credit derivatives (3) Purchased credit derivatives: Credit default swaps (2) 470.9 4.1 — 4.1 11.1 — 11.1 Total return swaps/options 54.1 0.1 — 0.1 1.3 — 1.3 Written credit derivatives: Credit default swaps (2) 448.2 10.6 — 10.6 3.6 — 3.6 Total return swaps/options 55.2 0.8 — 0.8 0.2 — 0.2 Gross derivative assets/liabilities $ 345.8 $ 5.8 $ 351.6 $ 340.8 $ 5.2 $ 346.0 Less: Legally enforceable master netting agreements (2) (279.2 ) (279.2 ) Less: Cash collateral received/paid (2) (34.6 ) (32.5 ) Total derivative assets/liabilities $ 37.8 $ 34.3 (1) Represents the total contract/notional amount of derivative assets and liabilities outstanding. (2) Derivative assets and liabilities reflect the effects of contractual amendments by two central clearing counterparties to legally re-characterize daily cash variation margin from collateral, which secures an outstanding exposure, to settlement, which discharges an outstanding exposure. One of these central clearing counterparties amended its governing documents, which became effective in January 2017. In addition, the Corporation elected to transfer its existing positions to the settlement platform for the other central clearing counterparty in September 2017. (3) The net derivative asset and notional amount of written credit derivatives for which the Corporation held purchased credit derivatives with identical underlying referenced names were $6.4 billion and $435.1 billion at December 31, 2017 . December 31, 2016 Gross Derivative Assets Gross Derivative Liabilities (Dollars in billions) Contract/ Notional (1) Trading and Other Risk Management Derivatives Qualifying Hedges Total Trading and Other Risk Management Derivatives Qualifying Hedges Total Interest rate contracts Swaps $ 16,977.7 $ 385.0 $ 5.9 $ 390.9 $ 386.9 $ 2.0 $ 388.9 Futures and forwards 5,609.5 2.2 — 2.2 2.1 — 2.1 Written options 1,146.2 — — — 52.2 — 52.2 Purchased options 1,178.7 53.3 — 53.3 — — — Foreign exchange contracts Swaps 1,828.6 54.6 4.2 58.8 58.8 6.2 65.0 Spot, futures and forwards 3,410.7 58.8 1.7 60.5 56.6 0.8 57.4 Written options 356.6 — — — 9.4 — 9.4 Purchased options 342.4 8.9 — 8.9 — — — Equity contracts Swaps 189.7 3.4 — 3.4 4.0 — 4.0 Futures and forwards 68.7 0.9 — 0.9 0.9 — 0.9 Written options 431.5 — — — 21.4 — 21.4 Purchased options 385.5 23.9 — 23.9 — — — Commodity contracts Swaps 48.2 2.5 — 2.5 5.1 — 5.1 Futures and forwards 49.1 3.6 — 3.6 0.5 — 0.5 Written options 29.3 — — — 1.9 — 1.9 Purchased options 28.9 2.0 — 2.0 — — — Credit derivatives (2) Purchased credit derivatives: Credit default swaps 604.0 8.1 — 8.1 10.3 — 10.3 Total return swaps/options 21.2 0.4 — 0.4 1.5 — 1.5 Written credit derivatives: Credit default swaps 614.4 10.7 — 10.7 7.5 — 7.5 Total return swaps/options 25.4 1.0 — 1.0 0.2 — 0.2 Gross derivative assets/liabilities $ 619.3 $ 11.8 $ 631.1 $ 619.3 $ 9.0 $ 628.3 Less: Legally enforceable master netting agreements (545.3 ) (545.3 ) Less: Cash collateral received/paid (43.3 ) (43.5 ) Total derivative assets/liabilities $ 42.5 $ 39.5 (1) Represents the total contract/notional amount of derivative assets and liabilities outstanding. (2) The net derivative asset and notional amount of written credit derivatives for which the Corporation held purchased credit derivatives with identical underlying referenced names were $2.2 billion and $548.9 billion at December 31, 2016 . Offsetting of Derivatives The Corporation enters into International Swaps and Derivatives Association, Inc. (ISDA) master netting agreements or similar agreements with substantially all of the Corporation’s derivative counterparties. Where legally enforceable, these master netting agreements give the Corporation, in the event of default by the counterparty, the right to liquidate securities held as collateral and to offset receivables and payables with the same counterparty. For purposes of the Consolidated Balance Sheet, the Corporation offsets derivative assets and liabilities and cash collateral held with the same counterparty where it has such a legally enforceable master netting agreement. The following table presents derivative instruments included in derivative assets and liabilities on the Consolidated Balance Sheet at December 31, 2017 and 2016 by primary risk (e.g., interest rate risk) and the platform, where applicable, on which these derivatives are transacted. Balances are presented on a gross basis, prior to the application of counterparty and cash collateral netting. Total gross derivative assets and liabilities are adjusted on an aggregate basis to take into consideration the effects of legally enforceable master netting agreements which includes reducing the balance for counterparty netting and cash collateral received or paid. For more information on offsetting of securities financing agreements, see Note 10 – Federal Funds Sold or Purchased, Securities Financing Agreements and Short-term Borrowings . Offsetting of Derivatives (1) Derivative Assets Derivative Liabilities Derivative Assets Derivative Liabilities (Dollars in billions) December 31, 2017 December 31, 2016 Interest rate contracts Over-the-counter $ 211.7 $ 206.0 $ 267.3 $ 258.2 Over-the-counter cleared (2) 1.9 1.8 177.2 182.8 Foreign exchange contracts Over-the-counter 78.7 80.8 124.3 126.7 Over-the-counter cleared 0.9 0.7 0.3 0.3 Equity contracts Over-the-counter 18.3 16.2 15.6 13.7 Exchange-traded 9.1 8.5 11.4 10.8 Commodity contracts Over-the-counter 2.9 4.4 3.7 4.9 Exchange-traded 0.7 0.8 1.1 1.0 Credit derivatives Over-the-counter 9.1 9.6 15.3 14.7 Over-the-counter cleared (2) 6.1 6.0 4.3 4.3 Total gross derivative assets/liabilities, before netting Over-the-counter 320.7 317.0 426.2 418.2 Exchange-traded 9.8 9.3 12.5 11.8 Over-the-counter cleared (2) 8.9 8.5 181.8 187.4 Less: Legally enforceable master netting agreements and cash collateral received/paid Over-the-counter (296.9 ) (294.6 ) (398.2 ) (392.6 ) Exchange-traded (8.6 ) (8.6 ) (8.9 ) (8.9 ) Over-the-counter cleared (2) (8.3 ) (8.5 ) (181.5 ) (187.3 ) Derivative assets/liabilities, after netting 25.6 23.1 31.9 28.6 Other gross derivative assets/liabilities (3) 12.2 11.2 10.6 10.9 Total derivative assets/liabilities 37.8 34.3 42.5 39.5 Less: Financial instruments collateral (4) (11.2 ) (10.4 ) (13.5 ) (10.5 ) Total net derivative assets/liabilities $ 26.6 $ 23.9 $ 29.0 $ 29.0 (1) OTC derivatives include bilateral transactions between the Corporation and a particular counterparty. OTC-cleared derivatives include bilateral transactions between the Corporation and a counterparty where the transaction is cleared through a clearinghouse, and exchange-traded derivatives include listed options transacted on an exchange. (2) Derivative assets and liabilities reflect the effects of contractual amendments by two central clearing counterparties to legally re-characterize daily cash variation margin from collateral, which secures an outstanding exposure, to settlement, which discharges an outstanding exposure. One of these central clearing counterparties amended its governing documents, which became effective in January 2017. In addition, the Corporation elected to transfer its existing positions to the settlement platform for the other central clearing counterparty in September 2017. (3) Consists of derivatives entered into under master netting agreements where the enforceability of these agreements is uncertain under bankruptcy laws in some countries or industries. (4) Amounts are limited to the derivative asset/liability balance and, accordingly, do not include excess collateral received/pledged. Financial instruments collateral includes securities collateral received or pledged and cash securities held and posted at third-party custodians that are not offset on the Consolidated Balance Sheet but shown as a reduction to derive net derivative assets and liabilities. ALM and Risk Management Derivatives The Corporation’s ALM and risk management activities include the use of derivatives to mitigate risk to the Corporation including derivatives designated in qualifying hedge accounting relationships and derivatives used in other risk management activities. Interest rate, foreign exchange, equity, commodity and credit contracts are utilized in the Corporation’s ALM and risk management activities. The Corporation maintains an overall interest rate risk management strategy that incorporates the use of interest rate contracts, which are generally non-leveraged generic interest rate and basis swaps, options, futures and forwards, to minimize significant fluctuations in earnings caused by interest rate volatility. The Corporation’s goal is to manage interest rate sensitivity and volatility so that movements in interest rates do not significantly adversely affect earnings or capital. As a result of interest rate fluctuations, hedged fixed-rate assets and liabilities appreciate or depreciate in fair value. Gains or losses on the derivative instruments that are linked to the hedged fixed-rate assets and liabilities are expected to substantially offset this unrealized appreciation or depreciation. Market risk, including interest rate risk, can be substantial in the mortgage business. Market risk in the mortgage business is the risk that values of mortgage assets or revenues will be adversely affected by changes in market conditions such as interest rate movements. To mitigate the interest rate risk in mortgage banking production income, the Corporation utilizes forward loan sale commitments and other derivative instruments, including purchased options, and certain debt securities. The Corporation also utilizes derivatives such as interest rate options, interest rate swaps, forward settlement contracts and eurodollar futures to hedge certain market risks of MSRs. For more information on MSRs, see Note 20 – Fair Value Measurements . The Corporation uses foreign exchange contracts to manage the foreign exchange risk associated with certain foreign currency-denominated assets and liabilities, as well as the Corporation’s investments in non-U.S. subsidiaries. Foreign exchange contracts, which include spot and forward contracts, represent agreements to exchange the currency of one country for the currency of another country at an agreed-upon price on an agreed-upon settlement date. Exposure to loss on these contracts will increase or decrease over their respective lives as currency exchange and interest rates fluctuate. The Corporation purchases credit derivatives to manage credit risk related to certain funded and unfunded credit exposures. Credit derivatives include credit default swaps (CDS), total return swaps and swaptions. These derivatives are recorded on the Consolidated Balance Sheet at fair value with changes in fair value recorded in other income. Derivatives Designated as Accounting Hedges The Corporation uses various types of interest rate, commodity and foreign exchange derivative contracts to protect against changes in the fair value of its assets and liabilities due to fluctuations in interest rates, commodity prices and exchange rates (fair value hedges). The Corporation also uses these types of contracts and equity derivatives to protect against changes in the cash flows of its assets and liabilities, and other forecasted transactions (cash flow hedges). The Corporation hedges its net investment in consolidated non-U.S. operations determined to have functional currencies other than the U.S. dollar using forward exchange contracts and cross-currency basis swaps, and by issuing foreign currency-denominated debt (net investment hedges). Fair Value Hedges The following table summarizes information related to fair value hedges for 2017 , 2016 and 2015 , including hedges of interest rate risk on long-term debt that were acquired as part of a business combination and redesignated at that time. At redesignation, the fair value of the derivatives was positive. As the derivatives mature, the fair value will approach zero. As a result, ineffectiveness will occur and the fair value changes in the derivatives and the long-term debt being hedged may be directionally the same in certain scenarios. Based on a regression analysis, the derivatives continue to be highly effective at offsetting changes in the fair value of the long-term debt attributable to interest rate risk. Derivatives Designated as Fair Value Hedges Gains (Losses) Derivative Hedged Item Hedge Ineffectiveness (Dollars in millions) 2017 2016 2015 2017 2016 2015 2017 2016 2015 Interest rate risk on long-term debt (1) $ (1,537 ) $ (1,488 ) $ (718 ) $ 1,045 $ 646 $ (77 ) $ (492 ) $ (842 ) $ (795 ) Interest rate and foreign currency risk on long-term debt (1) 1,811 (941 ) (1,898 ) (1,767 ) 944 1,812 44 3 (86 ) Interest rate risk on available-for-sale securities (2) (67 ) 227 105 35 (286 ) (127 ) (32 ) (59 ) (22 ) Total $ 207 $ (2,202 ) $ (2,511 ) $ (687 ) $ 1,304 $ 1,608 $ (480 ) $ (898 ) $ (903 ) (1) Amounts are recorded in interest expense on long-term debt and in other income. (2) Amounts are recorded in interest income on debt securities. Cash Flow and Net Investment Hedges The table below summarizes certain information related to cash flow hedges and net investment hedges for 2017 , 2016 , and 2015 . Of the $831 million after-tax net loss ( $1.3 billion pre-tax) on derivatives in accumulated OCI at December 31, 2017 , $130 million after-tax ( $208 million pre-tax) is expected to be reclassified into earnings in the next 12 months. These net losses reclassified into earnings are expected to primarily reduce net interest income related to the respective hedged items. Amounts related to price risk on restricted stock awards reclassified from accumulated OCI are recorded in personnel expense. For terminated cash flow hedges, the time period over which the majority of the forecasted transactions are hedged is approximately seven years, with a maximum length of time for certain forecasted transactions of 19 years. Derivatives Designated as Cash Flow and Net Investment Hedges Gains (Losses) Recognized in Accumulated OCI on Derivatives Gains (Losses) in Income (Dollars in millions, amounts pre-tax) 2017 2016 2015 2017 2016 2015 Cash flow hedges Interest rate risk on variable-rate portfolios $ (109 ) $ (340 ) $ 95 $ (327 ) $ (553 ) $ (974 ) Price risk on certain restricted stock awards (1) 59 41 (40 ) 148 (32 ) 91 Total (2) $ (50 ) $ (299 ) $ 55 $ (179 ) $ (585 ) $ (883 ) Net investment hedges Foreign exchange risk (3) $ (1,588 ) $ 1,636 $ 3,010 $ 1,782 $ 3 $ 153 (1) Gains (losses) recognized in accumulated OCI are primarily related to the change in the Corporation’s stock price for the period. (2) In 2017 , 2016 and 2015 , amounts representing hedge ineffectiveness were not significant. (3) In 2017 , substantially all of the gains in income reclassified from accumulated OCI were comprised of the gain recognized on derivatives used to hedge the currency risk of the Corporation’s net investment in its non-U.S. consumer credit card business, which was sold in 2017. For more information, see Note 14 – Accumulated Other Comprehensive Income (Loss) . In 2017 , 2016 and 2015 , amounts excluded from effectiveness testing in total were $120 million , $325 million and $298 million . Other Risk Management Derivatives Other risk management derivatives are used by the Corporation to reduce certain risk exposures. These derivatives are not qualifying accounting hedges because either they did not qualify for or were not designated as accounting hedges. The table below presents gains (losses) on these derivatives for 2017 , 2016 and 2015 . These gains (losses) are largely offset by the income or expense that is recorded on the hedged item. Other Risk Management Derivatives Gains (Losses) (Dollars in millions) 2017 2016 2015 Interest rate risk on mortgage banking income (1) $ 8 $ 461 $ 254 Credit risk on loans (2) (6 ) (107 ) (22 ) Interest rate and foreign currency risk on ALM activities (3) (36 ) (754 ) (222 ) Price risk on certain restricted stock awards (4) 301 9 (267 ) (1) Net gains (losses) on these derivatives are recorded in mortgage banking income as they are used to mitigate the interest rate risk related to MSRs, IRLCs and mortgage LHFS, all of which are measured at fair value with changes in fair value recorded in mortgage banking income. The fair value of IRLCs is derived from the fair value of related mortgage loans which is based on observable market data and includes the expected net future cash flows related to servicing of the loans. The net gains on IRLCs related to the origination of mortgage loans that are held-for-sale, which are not included in the table but are considered derivative instruments, were $ 220 million , $533 million and $714 million for 2017 , 2016 and 2015 , respectively. (2) Primarily related to derivatives that are economic hedges of credit risk on loans. Net gains (losses) on these derivatives are recorded in other income. (3) Primarily related to hedges of debt securities carried at fair value and hedges of foreign currency-denominated debt. Gains (losses) on these derivatives and the related hedged items are recorded in other income. (4) Gains (losses) on these derivatives are recorded in personnel expense. Transfers of Financial Assets with Risk Retained through Derivatives The Corporation enters into certain transactions involving the transfer of financial assets that are accounted for as sales where substantially all of the economic exposure to the transferred financial assets is retained through derivatives (e.g., interest rate and/or credit), but the Corporation does not retain control over the assets transferred. Through December 31, 2017 and 2016 , the Corporation transferred $6.0 billion and $6.6 billion of non-U.S. government-guaranteed MBS to a third-party trust and retained economic exposure to the transferred assets through derivative contracts. In connection with these transfers, the Corporation received gross cash proceeds of $6.0 billion and $6.6 billion at the transfer dates. At December 31, 2017 and 2016 , the fair value of the transferred securities was $6.1 billion and $6.3 billion . Derivative assets of $46 million and $43 million and liabilities of $3 million and $10 million were recorded at December 31, 2017 and 2016 , and are included in credit derivatives in the derivative instruments table on page 113 . Sales and Trading Revenue The Corporation enters into trading derivatives to facilitate client transactions and to manage risk exposures arising from trading account assets and liabilities. It is the Corporation’s policy to include these derivative instruments in its trading activities which include derivatives and non-derivative cash instruments. The resulting risk from these derivatives is managed on a portfolio basis as part of the Corporation’s Global Markets business segment. The related sales and trading revenue generated within Global Markets is recorded in various income statement line items including trading account profits and net interest income as well as other revenue categories. Sales and trading revenue includes changes in the fair value and realized gains and losses on the sales of trading and other assets, net interest income, and fees primarily from commissions on equity securities. Revenue is generated by the difference in the client price for an instrument and the price at which the trading desk can execute the trade in the dealer market. For equity securities, commissions related to purchases and sales are recorded in the “Other” column in the Sales and Trading Revenue table. Changes in the fair value of these securities are included in trading account profits. For debt securities, revenue, with the exception of interest associated with the debt securities, is typically included in trading account profits. Unlike commissions for equity securities, the initial revenue related to broker-dealer services for debt securities is typically included in the pricing of the instrument rather than being charged through separate fee arrangements. Therefore, this revenue is recorded in trading account profits as part of the initial mark to fair value. For derivatives, the majority of revenue is included in trading account profits. In transactions where the Corporation acts as agent, which include exchange-traded futures and options, fees are recorded in other income. The table below, which includes both derivatives and non-derivative cash instruments, identifies the amounts in the respective income statement line items attributable to the Corporation’s sales and trading revenue in Global Markets , categorized by primary risk, for 2017 , 2016 and 2015 . The difference between total trading account profits in the following table and in the Consolidated Statement of Income represents trading activities in business segments other than Global Markets . This table includes DVA and funding valuation adjustment (FVA) gains (losses). Global Markets results in Note 23 – Business Segment Information are presented on a fully taxable-equivalent (FTE) basis. The following table is not presented on an FTE basis. Sales and Trading Revenue Trading Account Profits Net Interest Income Other (1) Total (Dollars in millions) 2017 Interest rate risk $ 1,145 $ 980 $ 417 $ 2,542 Foreign exchange risk 1,417 (1 ) (162 ) 1,254 Equity risk 2,689 (525 ) 1,904 4,068 Credit risk 1,251 2,537 577 4,365 Other risk 204 33 75 312 Total sales and trading revenue $ 6,706 $ 3,024 $ 2,811 $ 12,541 2016 Interest rate risk $ 1,613 $ 1,410 $ 304 $ 3,327 Foreign exchange risk 1,360 (10 ) (154 ) 1,196 Equity risk 1,917 20 2,074 4,011 Credit risk 1,250 2,569 424 4,243 Other risk 407 (20 ) 40 427 Total sales and trading revenue $ 6,547 $ 3,969 $ 2,688 $ 13,204 2015 Interest rate risk $ 1,290 $ 1,333 $ (259 ) $ 2,364 Foreign exchange risk 1,322 (10 ) (117 ) 1,195 Equity risk 2,115 56 2,152 4,323 Credit risk 920 2,333 445 3,698 Other risk 459 (81 ) 62 440 Total sales and trading revenue $ 6,106 $ 3,631 $ 2,283 $ 12,020 (1) Represents amounts in investment and brokerage services and other income that are recorded in Global Markets and included in the definition of sales and trading revenue. Includes investment and brokerage services revenue of $ 2.0 billion , $2.1 billion , and $2.2 billion for 2017 , 2016 , and 2015 , respectively. Credit Derivatives The Corporation enters into credit derivatives primarily to facilitate client transactions and to manage credit risk exposures. Credit derivatives derive value based on an underlying third-party referenced obligation or a portfolio of referenced obligations and generally require the Corporation, as the seller of credit protection, to make payments to a buyer upon the occurrence of a pre-defined credit event. Such credit events generally include bankruptcy of the referenced credit entity and failure to pay under the obligation, as well as acceleration of indebtedness and payment repudiation or moratorium. For credit derivatives based on a portfolio of referenced credits or credit indices, the Corporation may not be required to make payment until a specified amount of loss has occurred and/or may only be required to make payment up to a specified amount. Credit derivative instruments where the Corporation is the seller of credit protection and their expiration at December 31, 2017 and 2016 are summarized in the following table. Credit Derivative Instruments Less than One Year One to Three Years Three to Five Years Over Five Years Total December 31, 2017 (Dollars in millions) Carrying Value Credit default swaps: Investment grade $ 4 $ 3 $ 61 $ 245 $ 313 Non-investment grade 203 453 484 2,133 3,273 Total 207 456 545 2,378 3,586 Total return swaps/options: Investment grade 30 — — — 30 Non-investment grade 150 — — 3 153 Total 180 — — 3 183 Total credit derivatives $ 387 $ 456 $ 545 $ 2,381 $ 3,769 Credit-related notes: Investment grade $ — $ — $ 7 $ 689 $ 696 Non-investment grade 12 4 34 1,548 1,598 Total credit-related notes $ 12 $ 4 $ 41 $ 2,237 $ 2,294 Maximum Payout/Notional Credit default swaps: Investment grade $ 61,388 $ 115,480 $ 107,081 $ 21,579 $ 305,528 Non-investment grade 39,312 49,843 39,098 14,420 142,673 Total 100,700 165,323 146,179 35,999 448,201 Total return swaps/options: Investment grade 37,394 2,581 — 143 40,118 Non-investment grade 13,751 514 143 697 15,105 Total 51,145 3,095 143 840 55,223 Total credit derivatives $ 151,845 $ 168,418 $ 146,322 $ 36,839 $ 503,424 December 31, 2016 Carrying Value Credit default swaps: Investment grade $ 10 $ 64 $ 535 $ 783 $ 1,392 Non-investment grade 771 1,053 908 3,339 6,071 Total 781 1,117 1,443 4,122 7,463 Total return swaps/options: Investment grade 16 — — — 16 Non-investment grade 127 10 2 1 140 Total 143 10 2 1 156 Total credit derivatives $ 924 $ 1,127 $ 1,445 $ 4,123 $ 7,619 Credit-related notes: Investment grade $ — $ 12 $ 542 $ 1,423 $ 1,977 Non-investment grade 70 22 60 1,318 1,470 Total credit-related notes $ 70 $ 34 $ 602 $ 2,741 $ 3,447 Maximum Payout/Notional Credit default swaps: Investment grade $ 121,083 $ 143,200 $ 116,540 $ 21,905 $ 402,728 Non-investment grade 84,755 67,160 41,001 18,711 211,627 Total 205,838 210,360 157,541 40,616 614,355 Total return swaps/options: Investment grade 12,792 — — — 12,792 Non-investment grade 6,638 5,127 589 208 12,562 Total 19,430 5,127 589 208 25,354 Total credit derivatives $ 225,268 $ 215,487 $ 158,130 $ 40,824 $ 639,709 Credit derivatives are classified as investment and non-investment grade based on the credit quality of the underlying referenced obligation. The Corporation considers ratings of BBB- or higher as investment grade. Non-investment grade includes non-rated credit derivative instruments. The Corporation discloses internal categorizations of investment grade and non-investment grade consistent with how risk is managed for these instruments. The notional amount represents the maximum amount payable by the Corporation for most credit derivatives. However, the Corporation does not monitor its exposure to credit derivatives based solely on the notional amount because this measure does not take into consideration the probability of occurrence. As such, the notional amount is not a reliable indicator of the Corporation’s exposure to these contracts. Instead, a risk framework is used to define risk tolerances and establish limits so that certain credit risk-related losses occur within acceptable, predefined limits. Credit-related notes in the table above include investments in securities issued by CDO, collateralized loan obligation (CLO) and credit-linked note vehicles. These instruments are primarily classified as trading securities. The carrying value of these instruments equals the Corporation’s maximum exposure to loss. The Corporation is not obligated to make any payments to the entities under the terms of the securities owned. Credit-related Contingent Features and Collateral The Corporation executes the majority of its derivative contracts in the OTC market with large, international financial institutions, including broker-dealers and, to a lesser degree, with a variety of non-financial companies. A significant majority of the derivative transactions are executed on a daily margin basis. Therefore, events such as a credit rating downgrade (depending on the ultimate rating level) or a breach of credit covenants would typically require an increase in the amount of collateral required of the counterparty, where applicable, and/or allow the Corporation to take additional protective measures such as early termination of all trades. Further, as previously discussed on page 114 , the Corporation enters into legally enforceable master netting agreements which reduce risk by permitting closeout and netting of transactions with the same counterparty upon the occurrence of certain events. A majority of the Corporation’s derivative contracts contain credit risk-related contingent features, primarily in the form of ISDA master netting agreements and credit support documentation that enhance the creditworthiness of these instruments compared to other obligations of the respective counterparty with whom the Corporation has transacted. These contingent features may be for the benefit of the Corporation as well as its counterparties with respect to changes in the Corporation’s creditworthiness and the mark-to-market exposure under the derivative transactions. At December 31, 2017 and 2016 , the Corporation held cash and securities collateral of $77.2 billion and $85.5 billion , and posted cash and securities collateral of $59.2 billion and $71.1 billion in the normal course of business under derivative agreements, excluding cross-product margining agreements where clients are permitted to margin on a net basis for both derivative and secured financing arrangements. In connection with certain OTC derivative contracts and other trading agreements, the Corporation can be required to provide additional collateral or to terminate transactions with certain counterparties in the event of a downgrade of the senior debt ratings of the Corporation or certain subsidiaries. The amount of additional collateral required depends on the contract and is usually a fixed incremental amount and/or the market value of the exposure. At December 31, 2017 , the amount of collateral, calculated based on the terms of the contracts, that the Corporation and certain subsidiaries could be required to post to counterparties but had not yet posted to counterparties was approximately $3.2 billion , including $2.1 billion for Bank of America, National Association (Bank of America, N.A. or BANA). Some counterparties are currently able to unilaterally terminate certain contracts, or the Corporation or certain subsidiaries may be required to take other action such as find a suitable replacement or obtain a guarantee. At December 31, 2017 and 2016 , the liability recorded for these derivative contracts was not significant. The following table presents the amount of additional collateral that would have been contractually required by derivative contracts and other trading agreements at December 31, 2017 if the rating agencies had downgraded their long-term senior debt ratings for the Corporation or certain subsidiaries by one incremental notch and by an additional second incremental notch. Additional Collateral Required to be Posted Upon Downgrade at December 31, 2017 (Dollars in millions) One incremental notch Second incremental notch Bank of America Corporation $ 779 $ 487 Bank of America, N.A. and subsidiaries (1) 391 230 (1) Included in Bank of America Corpor

Securities

Securities	12 Months Ended
	Dec. 31, 2017
Investments, Debt and Equity Securities [Abstract]
Securities	Securities The table below presents the amortized cost, gross unrealized gains and losses, and fair value of AFS debt securities, other debt securities carried at fair value, HTM debt securities and AFS marketable equity securities at December 31, 2017 and 2016 . Debt Securities and Available-for-Sale Marketable Equity Securities Amortized Cost Gross Gains Gross Losses Fair Value (Dollars in millions) December 31, 2017 Available-for-sale debt securities Mortgage-backed securities: Agency $ 194,119 $ 506 $ (1,696 ) $ 192,929 Agency-collateralized mortgage obligations 6,846 39 (81 ) 6,804 Commercial 13,864 28 (208 ) 13,684 Non-agency residential (1) 2,410 267 (8 ) 2,669 Total mortgage-backed securities 217,239 840 (1,993 ) 216,086 U.S. Treasury and agency securities 54,523 18 (1,018 ) 53,523 Non-U.S. securities 6,669 9 (1 ) 6,677 Other taxable securities, substantially all asset-backed securities 5,699 73 (2 ) 5,770 Total taxable securities 284,130 940 (3,014 ) 282,056 Tax-exempt securities 20,541 138 (104 ) 20,575 Total available-for-sale debt securities 304,671 1,078 (3,118 ) 302,631 Other debt securities carried at fair value 12,273 252 (39 ) 12,486 Total debt securities carried at fair value 316,944 1,330 (3,157 ) 315,117 Held-to-maturity debt securities, substantially all U.S. agency mortgage-backed securities 125,013 111 (1,825 ) 123,299 Total debt securities (2) $ 441,957 $ 1,441 $ (4,982 ) $ 438,416 Available-for-sale marketable equity securities (3) $ 27 $ — $ (2 ) $ 25 December 31, 2016 Available-for-sale debt securities Mortgage-backed securities: Agency $ 190,809 $ 640 $ (1,963 ) $ 189,486 Agency-collateralized mortgage obligations 8,296 85 (51 ) 8,330 Commercial 12,594 21 (293 ) 12,322 Non-agency residential (1) 1,863 181 (31 ) 2,013 Total mortgage-backed securities 213,562 927 (2,338 ) 212,151 U.S. Treasury and agency securities 48,800 204 (752 ) 48,252 Non-U.S. securities 6,372 13 (3 ) 6,382 Other taxable securities, substantially all asset-backed securities 10,573 64 (23 ) 10,614 Total taxable securities 279,307 1,208 (3,116 ) 277,399 Tax-exempt securities 17,272 72 (184 ) 17,160 Total available-for-sale debt securities 296,579 1,280 (3,300 ) 294,559 Less: Available-for-sale securities of business held for sale (4) (619 ) — — (619 ) Other debt securities carried at fair value 19,748 121 (149 ) 19,720 Total debt securities carried at fair value 315,708 1,401 (3,449 ) 313,660 Held-to-maturity debt securities, substantially all U.S. agency mortgage-backed securities 117,071 248 (2,034 ) 115,285 Total debt securities (2) $ 432,779 $ 1,649 $ (5,483 ) $ 428,945 Available-for-sale marketable equity securities (3) $ 325 $ 51 $ (1 ) $ 375 (1) At December 31, 2017 and 2016 , the underlying collateral type included approximately 62 percent and 60 percent prime, 13 percent and 19 percent Alt-A, and 25 percent and 21 percent subprime. (2) The Corporation had debt securities from FNMA and FHLMC that each exceeded 10 percent of shareholders’ equity, with an amortized cost of $163.6 billion and $50.3 billion , and a fair value of $162.1 billion and $50.0 billion at December 31, 2017 , and an amortized cost of $156.4 billion and $48.7 billion , and a fair value of $154.4 billion and $48.3 billion at December 31, 2016 . (3) Classified in other assets on the Consolidated Balance Sheet. (4) Represents AFS debt securities of business held for sale. In 2017, the Corporation sold its non-U.S. consumer credit card business. At December 31, 2017 , the accumulated net unrealized loss on AFS debt securities included in accumulated OCI was $1.2 billion , net of the related income tax benefit of $872 million . At December 31, 2017 and 2016 , the Corporation had nonperforming AFS debt securities of $99 million and $121 million . The following table presents the components of other debt securities carried at fair value where the changes in fair value are reported in other income. In 2017 , the Corporation recorded unrealized mark-to-market net gains of $243 million and realized net losses of $49 million compared to unrealized mark-to-market net gains of $51 million and realized net losses of $128 million in 2016 . These amounts exclude hedge results. Other Debt Securities Carried at Fair Value December 31 (Dollars in millions) 2017 2016 Mortgage-backed securities: Agency-collateralized mortgage obligations $ 5 $ 5 Non-agency residential 2,764 3,139 Total mortgage-backed securities 2,769 3,144 Non-U.S. securities (1) 9,488 16,336 Other taxable securities, substantially all asset-backed securities 229 240 Total $ 12,486 $ 19,720 (1) These securities are primarily used to satisfy certain international regulatory liquidity requirements. The gross realized gains and losses on sales of AFS debt securities for 2017 , 2016 and 2015 are presented in the table below. Gains and Losses on Sales of AFS Debt Securities (Dollars in millions) 2017 2016 2015 Gross gains $ 352 $ 520 $ 1,174 Gross losses (97 ) (30 ) (36 ) Net gains on sales of AFS debt securities $ 255 $ 490 $ 1,138 Income tax expense attributable to realized net gains on sales of AFS debt securities $ 97 $ 186 $ 432 The table below presents the fair value and the associated gross unrealized losses on AFS debt securities and whether these securities have had gross unrealized losses for less than 12 months or for 12 months or longer at December 31, 2017 and 2016 . Temporarily Impaired and Other-than-temporarily Impaired AFS Debt Securities Less than Twelve Months Twelve Months or Longer Total Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses (Dollars in millions) December 31, 2017 Temporarily impaired AFS debt securities Mortgage-backed securities: Agency $ 73,535 $ (352 ) $ 72,612 $ (1,344 ) $ 146,147 $ (1,696 ) Agency-collateralized mortgage obligations 2,743 (29 ) 1,684 (52 ) 4,427 (81 ) Commercial 5,575 (50 ) 4,586 (158 ) 10,161 (208 ) Non-agency residential 335 (7 ) — — 335 (7 ) Total mortgage-backed securities 82,188 (438 ) 78,882 (1,554 ) 161,070 (1,992 ) U.S. Treasury and agency securities 27,537 (251 ) 24,035 (767 ) 51,572 (1,018 ) Non-U.S. securities 772 (1 ) — — 772 (1 ) Other taxable securities, substantially all asset-backed securities — — 92 (2 ) 92 (2 ) Total taxable securities 110,497 (690 ) 103,009 (2,323 ) 213,506 (3,013 ) Tax-exempt securities 1,090 (2 ) 7,100 (102 ) 8,190 (104 ) Total temporarily impaired AFS debt securities 111,587 (692 ) 110,109 (2,425 ) 221,696 (3,117 ) Other-than-temporarily impaired AFS debt securities (1) Non-agency residential mortgage-backed securities 58 (1 ) — — 58 (1 ) Total temporarily impaired and other-than-temporarily impaired AFS debt securities $ 111,645 $ (693 ) $ 110,109 $ (2,425 ) $ 221,754 $ (3,118 ) December 31, 2016 Temporarily impaired AFS debt securities Mortgage-backed securities: Agency $ 135,210 $ (1,846 ) $ 3,770 $ (117 ) $ 138,980 $ (1,963 ) Agency-collateralized mortgage obligations 3,229 (25 ) 1,028 (26 ) 4,257 (51 ) Commercial 9,018 (293 ) — — 9,018 (293 ) Non-agency residential 212 (1 ) 204 (13 ) 416 (14 ) Total mortgage-backed securities 147,669 (2,165 ) 5,002 (156 ) 152,671 (2,321 ) U.S. Treasury and agency securities 28,462 (752 ) — — 28,462 (752 ) Non-U.S. securities 52 (1 ) 142 (2 ) 194 (3 ) Other taxable securities, substantially all asset-backed securities 762 (5 ) 1,438 (18 ) 2,200 (23 ) Total taxable securities 176,945 (2,923 ) 6,582 (176 ) 183,527 (3,099 ) Tax-exempt securities 4,782 (148 ) 1,873 (36 ) 6,655 (184 ) Total temporarily impaired AFS debt securities 181,727 (3,071 ) 8,455 (212 ) 190,182 (3,283 ) Other-than-temporarily impaired AFS debt securities (1) Non-agency residential mortgage-backed securities 94 (1 ) 401 (16 ) 495 (17 ) Total temporarily impaired and other-than-temporarily impaired AFS debt securities $ 181,821 $ (3,072 ) $ 8,856 $ (228 ) $ 190,677 $ (3,300 ) (1) Includes OTTI AFS debt securities on which an OTTI loss, primarily related to changes in interest rates, remains in accumulated OCI. The Corporation had $41 million , $19 million and $81 million of credit-related OTTI losses on AFS debt securities that were recognized in other income in 2017 , 2016 and 2015 , respectfully. The amount of noncredit-related OTTI losses, which is recognized in OCI, was insignificant for all periods presented. The cumulative credit loss component of OTTI losses that have been recognized in income related to AFS debt securities that the Corporation does not intend to sell was $274 million , $253 million and $266 million at December 31, 2017 , 2016 and 2015 , respectfully. The Corporation estimates the portion of a loss on a security that is attributable to credit using a discounted cash flow model and estimates the expected cash flows of the underlying collateral using internal credit, interest rate and prepayment risk models that incorporate management’s best estimate of current key assumptions such as default rates, loss severity and prepayment rates. Assumptions used for the underlying loans that support the MBS can vary widely from loan to loan and are influenced by such factors as loan interest rate, geographic location of the borrower, borrower characteristics and collateral type. Based on these assumptions, the Corporation then determines how the underlying collateral cash flows will be distributed to each MBS issued from the applicable special purpose entity. Expected principal and interest cash flows on an impaired AFS debt security are discounted using the effective yield of each individual impaired AFS debt security. Significant assumptions used in estimating the expected cash flows for measuring credit losses on non-agency residential mortgage-backed securities (RMBS) were as follows at December 31, 2017 . Significant Assumptions Range (1) Weighted- 10th Percentile (2) 90th Percentile (2) Prepayment speed 12.4 % 3.0 % 21.3 % Loss severity 20.2 9.1 36.7 Life default rate 20.9 1.2 76.6 (1) Represents the range of inputs/assumptions based upon the underlying collateral. (2) The value of a variable below which the indicated percentile of observations will fall. Annual constant prepayment speed and loss severity rates are projected considering collateral characteristics such as LTV, creditworthiness of borrowers as measured using Fair Isaac Corporation (FICO) scores, and geographic concentrations. The weighted-average severity by collateral type was 17.5 percent for prime, 18.1 percent for Alt-A and 29.0 percent for subprime at December 31, 2017 . Default rates are projected by considering collateral characteristics including, but not limited to, LTV, FICO and geographic concentration. Weighted-average life default rates by collateral type were 16.9 percent for prime, 21.4 percent for Alt-A and 21.6 percent for subprime at December 31, 2017 . The remaining contractual maturity distribution and yields of the Corporation’s debt securities carried at fair value and HTM debt securities at December 31, 2017 are summarized in the table below. Actual duration and yields may differ as prepayments on the loans underlying the mortgages or other ABS are passed through to the Corporation. Maturities of Debt Securities Carried at Fair Value and Held-to-maturity Debt Securities Due in One Year or Less Due after One Year through Five Years Due after Five Years through Ten Years Due after Ten Years Total Amount Yield (1) Amount Yield (1) Amount Yield (1) Amount Yield (1) Amount Yield (1) (Dollars in millions) December 31, 2017 Amortized cost of debt securities carried at fair value Mortgage-backed securities: Agency $ 5 4.20 % $ 28 3.69 % $ 555 2.57 % $ 193,531 3.22 % $ 194,119 3.22 % Agency-collateralized mortgage obligations — — — — 33 2.52 6,817 3.18 6,850 3.18 Commercial 54 7.45 974 1.98 11,866 2.43 970 2.78 13,864 2.44 Non-agency residential — — — — 24 0.01 4,955 9.32 4,979 9.28 Total mortgage-backed securities 59 7.18 1,002 2.03 12,478 2.43 206,273 3.36 219,812 3.31 U.S. Treasury and agency securities 490 0.39 23,395 1.42 30,615 2.03 23 2.52 54,523 1.75 Non-U.S. securities 13,832 1.02 2,111 0.97 48 0.72 167 6.60 16,158 1.07 Other taxable securities, substantially all asset-backed securities 1,979 2.53 2,029 3.02 1,151 3.22 751 4.74 5,910 3.11 Total taxable securities 16,360 1.21 28,537 1.52 44,292 2.17 207,214 3.37 296,403 2.89 Tax-exempt securities 1,327 1.81 6,927 1.88 9,132 1.79 3,155 1.84 20,541 1.83 Total amortized cost of debt securities carried at fair value $ 17,687 1.25 $ 35,464 1.59 $ 53,424 2.11 $ 210,369 3.35 $ 316,944 2.82 Amortized cost of HTM debt securities (2) $ 1 5.82 $ 71 3.06 $ 1,144 2.65 $ 123,797 3.03 $ 125,013 3.03 Debt securities carried at fair value Mortgage-backed securities: Agency $ 5 $ 28 $ 555 $ 192,341 $ 192,929 Agency-collateralized mortgage obligations — — 32 6,777 6,809 Commercial 54 969 11,703 958 13,684 Non-agency residential — — 33 5,400 5,433 Total mortgage-backed securities 59 997 12,323 205,476 218,855 U.S. Treasury and agency securities 491 22,898 30,111 23 53,523 Non-U.S. securities 13,830 2,115 48 172 16,165 Other taxable securities, substantially all asset-backed securities 1,981 2,006 1,184 828 5,999 Total taxable securities 16,361 28,016 43,666 206,499 294,542 Tax-exempt securities 1,326 6,934 9,162 3,153 20,575 Total debt securities carried at fair value $ 17,687 $ 34,950 $ 52,828 $ 209,652 $ 315,117 Fair value of HTM debt securities (2) $ 1 $ 71 $ 1,117 $ 122,110 $ 123,299 (1) The average yield is computed based on a constant effective interest rate over the contractual life of each security. The average yield considers the contractual coupon and the amortization of premiums and accretion of discounts, excluding the effect of related hedging derivatives. (2) Substantially all U.S. agency MBS.

Outstanding Loans and Leases

Outstanding Loans and Leases	12 Months Ended
	Dec. 31, 2017
Receivables [Abstract]
Outstanding Loans and Leases	Outstanding Loans and Leases The following tables present total outstanding loans and leases and an aging analysis for the Consumer Real Estate, Credit Card and Other Consumer, and Commercial portfolio segments, by class of financing receivables, at December 31, 2017 and 2016 . In 2017, the Corporation sold its non-U.S. consumer credit card business. This business, which at December 31, 2016 included $9.2 billion of non-U.S. credit card loans and the related allowance for loan and lease losses of $243 million , was presented in assets of business held for sale on the Consolidated Balance Sheet. In this Note, all applicable amounts for December 31, 2016 include these balances, unless otherwise noted. For more information, see Note 1 – Summary of Significant Accounting Principles . 30-59 Days Past Due (1) 60-89 Days Past Due (1) 90 Days or Past Due (2) Total Past or More Total Current or Less Than 30 Days Past Due (3) Purchased (4) Loans Accounted for Under the Fair Value Option Total Outstandings (Dollars in millions) December 31, 2017 Consumer real estate Core portfolio Residential mortgage $ 1,242 $ 321 $ 1,040 $ 2,603 $ 174,015 $ 176,618 Home equity 215 108 473 796 43,449 44,245 Non-core portfolio Residential mortgage (5) 1,028 468 3,535 5,031 14,161 $ 8,001 27,193 Home equity 224 121 572 917 9,866 2,716 13,499 Credit card and other consumer U.S. credit card 542 405 900 1,847 94,438 96,285 Direct/Indirect consumer (6) 320 102 43 465 93,365 93,830 Other consumer (7) 10 2 1 13 2,665 2,678 Total consumer 3,581 1,527 6,564 11,672 431,959 10,717 454,348 Consumer loans accounted for under the fair value option (8) $ 928 928 Total consumer loans and leases 3,581 1,527 6,564 11,672 431,959 10,717 928 455,276 Commercial U.S. commercial 547 244 425 1,216 283,620 284,836 Non-U.S. commercial 52 1 3 56 97,736 97,792 Commercial real estate (9) 48 10 29 87 58,211 58,298 Commercial lease financing 110 68 26 204 21,912 22,116 U.S. small business commercial 95 45 88 228 13,421 13,649 Total commercial 852 368 571 1,791 474,900 476,691 Commercial loans accounted for under the fair value option (8) 4,782 4,782 Total commercial loans and leases 852 368 571 1,791 474,900 4,782 481,473 Total loans and leases (10) $ 4,433 $ 1,895 $ 7,135 $ 13,463 $ 906,859 $ 10,717 $ 5,710 $ 936,749 Percentage of outstandings 0.48 % 0.20 % 0.76 % 1.44 % 96.81 % 1.14 % 0.61 % 100.00 % (1) Consumer real estate loans 30-59 days past due includes fully-insured loans of $850 million and nonperforming loans of $253 million . Consumer real estate loans 60-89 days past due includes fully-insured loans of $386 million and nonperforming loans of $195 million . (2) Consumer real estate includes fully-insured loans of $3.2 billion . (3) Consumer real estate includes $2.3 billion and direct/indirect consumer includes $43 million of nonperforming loans. (4) PCI loan amounts are shown gross of the valuation allowance. (5) Total outstandings includes pay option loans of $1.4 billion . The Corporation no longer originates this product. (6) Total outstandings includes auto and specialty lending loans of $49.9 billion , unsecured consumer lending loans of $469 million , U.S. securities-based lending loans of $39.8 billion , non-U.S. consumer loans of $3.0 billion and other consumer loans of $684 million . (7) Total outstandings includes consumer leases of $2.5 billion and consumer overdrafts of $163 million . (8) Consumer loans accounted for under the fair value option includes residential mortgage loans of $567 million and home equity loans of $361 million . Commercial loans accounted for under the fair value option includes U.S. commercial loans of $2.6 billion and non-U.S. commercial loans of $2.2 billion . For more information, see Note 20 – Fair Value Measurements and Note 21 – Fair Value Option . (9) Total outstandings includes U.S. commercial real estate loans of $54.8 billion and non-U.S. commercial real estate loans of $3.5 billion . (10) The Corporation pledged $160.3 billion of loans to secure potential borrowing capacity with the Federal Reserve Bank and Federal Home Loan Bank (FHLB). This amount is not included in the parenthetical disclosure of loans and leases pledged as collateral on the Consolidated Balance Sheet as there were no related outstanding borrowings. 30-59 Days (1) 60-89 Days Past Due (1) 90 Days or (2) Total Past Total Current or Less Than 30 Days Past Due (3) Purchased (4) Loans Accounted for Under the Fair Value Option Total Outstandings (Dollars in millions) December 31, 2016 Consumer real estate Core portfolio Residential mortgage $ 1,340 $ 425 $ 1,213 $ 2,978 $ 153,519 $ 156,497 Home equity 239 105 451 795 48,578 49,373 Non-core portfolio Residential mortgage (5) 1,338 674 5,343 7,355 17,818 $ 10,127 35,300 Home equity 260 136 832 1,228 12,231 3,611 17,070 Credit card and other consumer U.S. credit card 472 341 782 1,595 90,683 92,278 Non-U.S. credit card 37 27 66 130 9,084 9,214 Direct/Indirect consumer (6) 272 79 34 385 93,704 94,089 Other consumer (7) 26 8 6 40 2,459 2,499 Total consumer 3,984 1,795 8,727 14,506 428,076 13,738 456,320 Consumer loans accounted for under the fair value option (8) $ 1,051 1,051 Total consumer loans and leases 3,984 1,795 8,727 14,506 428,076 13,738 1,051 457,371 Commercial U.S. commercial 952 263 400 1,615 268,757 270,372 Non-U.S. commercial 348 4 5 357 89,040 89,397 Commercial real estate (9) 20 10 56 86 57,269 57,355 Commercial lease financing 167 21 27 215 22,160 22,375 U.S. small business commercial 96 49 84 229 12,764 12,993 Total commercial 1,583 347 572 2,502 449,990 452,492 Commercial loans accounted for under the fair value option (8) 6,034 6,034 Total commercial loans and leases 1,583 347 572 2,502 449,990 6,034 458,526 Total consumer and commercial loans and leases (10) $ 5,567 $ 2,142 $ 9,299 $ 17,008 $ 878,066 $ 13,738 $ 7,085 $ 915,897 Less: Loans of business held for sale (10) (9,214 ) Total loans and leases (11) $ 906,683 Percentage of outstandings (10) 0.61 % 0.23 % 1.02 % 1.86 % 95.87 % 1.50 % 0.77 % 100.00 % (1) Consumer real estate loans 30-59 days past due includes fully-insured loans of $1.1 billion and nonperforming loans of $266 million . Consumer real estate loans 60-89 days past due includes fully-insured loans of $547 million and nonperforming loans of $216 million . (2) Consumer real estate includes fully-insured loans of $4.8 billion . (3) Consumer real estate includes $2.5 billion and direct/indirect consumer includes $27 million of nonperforming loans. (4) PCI loan amounts are shown gross of the valuation allowance. (5) Total outstandings includes pay option loans of $1.8 billion . The Corporation no longer originates this product. (6) Total outstandings includes auto and specialty lending loans of $48.9 billion , unsecured consumer lending loans of $585 million , U.S. securities-based lending loans of $40.1 billion , non-U.S. consumer loans of $3.0 billion , student loans of $497 million and other consumer loans of $1.1 billion . (7) Total outstandings includes consumer finance loans of $465 million , consumer leases of $1.9 billion and consumer overdrafts of $157 million . (8) Consumer loans accounted for under the fair value option includes residential mortgage loans of $710 million and home equity loans of $341 million . Commercial loans accounted for under the fair value option includes U.S. commercial loans of $2.9 billion and non-U.S. commercial loans of $3.1 billion . For more information, see Note 20 – Fair Value Measurements and Note 21 – Fair Value Option . (9) Total outstandings includes U.S. commercial real estate loans of $54.3 billion and non-U.S. commercial real estate loans of $3.1 billion . (10) Includes non-U.S. credit card loans, which were included in assets of business held for sale on the Consolidated Balance Sheet. (11) The Corporation pledged $143.1 billion of loans to secure potential borrowing capacity with the Federal Reserve Bank and FHLB. This amount is not included in the parenthetical disclosure of loans and leases pledged as collateral on the Consolidated Balance Sheet as there were no related outstanding borrowings. The Corporation categorizes consumer real estate loans as core and non-core based on loan and customer characteristics such as origination date, product type, LTV, FICO score and delinquency status consistent with its current consumer and mortgage servicing strategy. Generally, loans that were originated after January 1, 2010, qualified under government-sponsored enterprise underwriting guidelines, or otherwise met the Corporation’s underwriting guidelines in place in 2015 are characterized as core loans. All other loans are generally characterized as non-core loans and represent run-off portfolios. The Corporation has entered into long-term credit protection agreements with FNMA and FHLMC on loans totaling $6.3 billion and $6.4 billion at December 31, 2017 and 2016 , providing full credit protection on residential mortgage loans that become severely delinquent. All of these loans are individually insured and therefore the Corporation does not record an allowance for credit losses related to these loans. Nonperforming Loans and Leases The Corporation classifies junior-lien home equity loans as nonperforming when the first-lien loan becomes 90 days past due even if the junior-lien loan is performing. At December 31, 2017 and 2016 , $330 million and $428 million of such junior-lien home equity loans were included in nonperforming loans. The Corporation classifies consumer real estate loans that have been discharged in Chapter 7 bankruptcy and not reaffirmed by the borrower as TDRs, irrespective of payment history or delinquency status, even if the repayment terms for the loan have not been otherwise modified. The Corporation continues to have a lien on the underlying collateral. At December 31, 2017 , nonperforming loans discharged in Chapter 7 bankruptcy with no change in repayment terms were $358 million of which $209 million were current on their contractual payments, while $124 million were 90 days or more past due. Of the contractually current nonperforming loans, 66 percent were discharged in Chapter 7 bankruptcy over 12 months ago, and 57 percent were discharged 24 months or more ago. During 2017 , the Corporation sold nonperforming and other delinquent consumer real estate loans with a carrying value of $1.3 billion , including $803 million of PCI loans, compared to $2.2 billion , including $549 million of PCI loans, in 2016 . The Corporation recorded net recoveries of $ 105 million related to these sales during 2017 and net charge-offs of $30 million during 2016 . Gains related to these sales of $57 million and $75 million were recorded in other income in the Consolidated Statement of Income during 2017 and 2016 . In 2017 and 2016, the Corporation transferred consumer nonperforming loans with a net carrying value of $198 million and $55 million to held-for-sale. The table below presents the Corporation’s nonperforming loans and leases including nonperforming TDRs, and loans accruing past due 90 days or more at December 31, 2017 and 2016 . Nonperforming LHFS are excluded from nonperforming loans and leases as they are recorded at either fair value or the lower of cost or fair value. For more information on the criteria for classification as nonperforming, see Note 1 – Summary of Significant Accounting Principles . Credit Quality Nonperforming Loans and Leases Accruing Past Due 90 Days or More December 31 (Dollars in millions) 2017 2016 2017 2016 Consumer real estate Core portfolio Residential mortgage (1) $ 1,087 $ 1,274 $ 417 $ 486 Home equity 1,079 969 — — Non-core portfolio Residential mortgage (1) 1,389 1,782 2,813 4,307 Home equity 1,565 1,949 — — Credit card and other consumer U.S. credit card n/a n/a 900 782 Non-U.S. credit card n/a n/a — 66 Direct/Indirect consumer 46 28 40 34 Other consumer — 2 — 4 Total consumer 5,166 6,004 4,170 5,679 Commercial U.S. commercial 814 1,256 144 106 Non-U.S. commercial 299 279 3 5 Commercial real estate 112 72 4 7 Commercial lease financing 24 36 19 19 U.S. small business commercial 55 60 75 71 Total commercial 1,304 1,703 245 208 Total loans and leases $ 6,470 $ 7,707 $ 4,415 $ 5,887 (1) Residential mortgage loans in the core and non-core portfolios accruing past due 90 days or more are fully-insured loans. At December 31, 2017 and 2016 , residential mortgage includes $2.2 billion and $3.0 billion of loans on which interest has been curtailed by the FHA, and therefore are no longer accruing interest, although principal is still insured, and $1.0 billion and $1.8 billion of loans on which interest is still accruing. n/a = not applicable Credit Quality Indicators The Corporation monitors credit quality within its Consumer Real Estate, Credit Card and Other Consumer, and Commercial portfolio segments based on primary credit quality indicators. For more information on the portfolio segments, see Note 1 – Summary of Significant Accounting Principles . Within the Consumer Real Estate portfolio segment, the primary credit quality indicators are refreshed LTV and refreshed FICO score. Refreshed LTV measures the carrying value of the loan as a percentage of the value of the property securing the loan, refreshed quarterly. Home equity loans are evaluated using CLTV which measures the carrying value of the Corporation’s loan and available line of credit combined with any outstanding senior liens against the property as a percentage of the value of the property securing the loan, refreshed quarterly. FICO score measures the creditworthiness of the borrower based on the financial obligations of the borrower and the borrower’s credit history. FICO scores are typically refreshed quarterly or more frequently. Certain borrowers (e.g., borrowers that have had debts discharged in a bankruptcy proceeding) may not have their FICO scores updated. FICO scores are also a primary credit quality indicator for the Credit Card and Other Consumer portfolio segment and the business card portfolio within U.S. small business commercial. Within the Commercial portfolio segment, loans are evaluated using the internal classifications of pass rated or reservable criticized as the primary credit quality indicators. The term reservable criticized refers to those commercial loans that are internally classified or listed by the Corporation as Special Mention, Substandard or Doubtful, which are asset quality categories defined by regulatory authorities. These assets have an elevated level of risk and may have a high probability of default or total loss. Pass rated refers to all loans not considered reservable criticized. In addition to these primary credit quality indicators, the Corporation uses other credit quality indicators for certain types of loans. The following tables present certain credit quality indicators for the Corporation’s Consumer Real Estate, Credit Card and Other Consumer, and Commercial portfolio segments, by class of financing receivables, at December 31, 2017 and 2016 . Consumer Real Estate – Credit Quality Indicators (1) Core Residential Mortgage (2) Non-core Residential (2) Residential Mortgage PCI (3) Core Home Equity (2) Non-core Home Equity (2) Home Equity PCI (Dollars in millions) December 31, 2017 Refreshed LTV (4) Less than or equal to 90 percent $ 153,669 $ 12,135 $ 6,872 $ 43,048 $ 7,944 $ 1,781 Greater than 90 percent but less than or equal to 100 percent 3,082 850 559 549 1,053 412 Greater than 100 percent 1,322 1,011 570 648 1,786 523 Fully-insured loans (5) 18,545 5,196 — — — — Total consumer real estate $ 176,618 $ 19,192 $ 8,001 $ 44,245 $ 10,783 $ 2,716 Refreshed FICO score Less than 620 $ 2,234 $ 2,390 $ 1,941 $ 1,169 $ 2,098 $ 452 Greater than or equal to 620 and less than 680 4,531 2,086 1,657 2,371 2,393 466 Greater than or equal to 680 and less than 740 22,934 3,519 2,396 8,115 2,723 786 Greater than or equal to 740 128,374 6,001 2,007 32,590 3,569 1,012 Fully-insured loans (5) 18,545 5,196 — — — — Total consumer real estate $ 176,618 $ 19,192 $ 8,001 $ 44,245 $ 10,783 $ 2,716 (1) Excludes $928 million of loans accounted for under the fair value option. (2) Excludes PCI loans. (3) Includes $1.2 billion of pay option loans. The Corporation no longer originates this product. (4) Refreshed LTV percentages for PCI loans are calculated using the carrying value net of the related valuation allowance. (5) Credit quality indicators are not reported for fully-insured loans as principal repayment is insured. Credit Card and Other Consumer – Credit Quality Indicators U.S. Credit Card Direct/Indirect Consumer Other Consumer (Dollars in millions) December 31, 2017 Refreshed FICO score Less than 620 $ 4,730 $ 1,630 $ 49 Greater than or equal to 620 and less than 680 12,422 2,000 143 Greater than or equal to 680 and less than 740 35,656 11,906 398 Greater than or equal to 740 43,477 34,838 1,921 Other internal credit metrics (1, 2) — 43,456 167 Total credit card and other consumer $ 96,285 $ 93,830 $ 2,678 (1) Other internal credit metrics may include delinquency status, geography or other factors. (2) Direct/indirect consumer includes $42.8 billion of securities-based lending which is overcollateralized and therefore has minimal credit risk. Commercial – Credit Quality Indicators (1) U.S. Commercial Non-U.S. Commercial Commercial Real Estate Commercial Financing U.S. Small Commercial (2) (Dollars in millions) December 31, 2017 Risk ratings Pass rated $ 275,904 $ 96,199 $ 57,732 $ 21,535 $ 322 Reservable criticized 8,932 1,593 566 581 50 Refreshed FICO score (3) Less than 620 223 Greater than or equal to 620 and less than 680 625 Greater than or equal to 680 and less than 740 1,875 Greater than or equal to 740 3,713 Other internal credit metrics (3, 4) 6,841 Total commercial $ 284,836 $ 97,792 $ 58,298 $ 22,116 $ 13,649 (1) Excludes $4.8 billion of loans accounted for under the fair value option. (2) U.S. small business commercial includes $709 million of criticized business card and small business loans which are evaluated using refreshed FICO scores or internal credit metrics, including delinquency status, rather than risk ratings. At December 31, 2017 , 98 percent of the balances where internal credit metrics are used was current or less than 30 days past due. (3) Refreshed FICO score and other internal credit metrics are applicable only to the U.S. small business commercial portfolio. (4) Other internal credit metrics may include delinquency status, application scores, geography or other factors. Consumer Real Estate – Credit Quality Indicators (1) Core Residential Mortgage (2) Non-core Residential (2) Residential Mortgage PCI (3) Core Home Equity (2) Non-core Home Equity (2) Home Equity PCI (Dollars in millions) December 31, 2016 Refreshed LTV (4) Less than or equal to 90 percent $ 129,737 $ 14,280 $ 7,811 $ 47,171 $ 8,480 $ 1,942 Greater than 90 percent but less than or equal to 100 percent 3,634 1,446 1,021 1,006 1,668 630 Greater than 100 percent 1,872 1,972 1,295 1,196 3,311 1,039 Fully-insured loans (5) 21,254 7,475 — — — — Total consumer real estate $ 156,497 $ 25,173 $ 10,127 $ 49,373 $ 13,459 $ 3,611 Refreshed FICO score Less than 620 $ 2,479 $ 3,198 $ 2,741 $ 1,254 $ 2,692 $ 559 Greater than or equal to 620 and less than 680 5,094 2,807 2,241 2,853 3,094 636 Greater than or equal to 680 and less than 740 22,629 4,512 2,916 10,069 3,176 1,069 Greater than or equal to 740 105,041 7,181 2,229 35,197 4,497 1,347 Fully-insured loans (5) 21,254 7,475 — — — — Total consumer real estate $ 156,497 $ 25,173 $ 10,127 $ 49,373 $ 13,459 $ 3,611 (1) Excludes $1.1 billion of loans accounted for under the fair value option. (2) Excludes PCI loans. (3) Includes $1.6 billion of pay option loans. The Corporation no longer originates this product. (4) Refreshed LTV percentages for PCI loans are calculated using the carrying value net of the related valuation allowance. (5) Credit quality indicators are not reported for fully-insured loans as principal repayment is insured. Credit Card and Other Consumer – Credit Quality Indicators U.S. Credit Card Non-U.S. Credit Card Direct/Indirect Consumer Other Consumer (1) (Dollars in millions) December 31, 2016 Refreshed FICO score Less than 620 $ 4,431 $ — $ 1,478 $ 187 Greater than or equal to 620 and less than 680 12,364 — 2,070 222 Greater than or equal to 680 and less than 740 34,828 — 12,491 404 Greater than or equal to 740 40,655 — 33,420 1,525 Other internal credit metrics (2, 3, 4) — 9,214 44,630 161 Total credit card and other consumer $ 92,278 $ 9,214 $ 94,089 $ 2,499 (1) At December 31, 2016 , 19 percent of the other consumer portfolio was associated with portfolios from certain consumer finance businesses that the Corporation previously exited. (2) Other internal credit metrics may include delinquency status, geography or other factors. (3) Direct/indirect consumer includes $43.1 billion of securities-based lending which is overcollateralized and therefore has minimal credit risk and $499 million of loans the Corporation no longer originates, primarily student loans. (4) Non-U.S. credit card represents the U.K. credit card portfolio which was evaluated using internal credit metrics, including delinquency status. At December 31, 2016 , 98 percent of this portfolio was current or less than 30 days past due, one percent was 30-89 days past due and one percent was 90 days or more past due. Commercial – Credit Quality Indicators (1) U.S. Commercial Non-U.S. Commercial Commercial Real Estate Commercial Financing U.S. Small Commercial (2) (Dollars in millions) December 31, 2016 Risk ratings Pass rated $ 261,214 $ 85,689 $ 56,957 $ 21,565 $ 453 Reservable criticized 9,158 3,708 398 810 71 Refreshed FICO score (3) Less than 620 200 Greater than or equal to 620 and less than 680 591 Greater than or equal to 680 and less than 740 1,741 Greater than or equal to 740 3,264 Other internal credit metrics (3, 4) 6,673 Total commercial $ 270,372 $ 89,397 $ 57,355 $ 22,375 $ 12,993 (1) Excludes $6.0 billion of loans accounted for under the fair value option. (2) U.S. small business commercial includes $755 million of criticized business card and small business loans which are evaluated using refreshed FICO scores or internal credit metrics, including delinquency status, rather than risk ratings. At December 31, 2016 , 98 percent of the balances where internal credit metrics are used was current or less than 30 days past due. (3) Refreshed FICO score and other internal credit metrics are applicable only to the U.S. small business commercial portfolio. (4) Other internal credit metrics may include delinquency status, application scores, geography or other factors. Impaired Loans and Troubled Debt Restructurings A loan is considered impaired when, based on current information, it is probable that the Corporation will be unable to collect all amounts due from the borrower in accordance with the contractual terms of the loan. Impaired loans include nonperforming commercial loans and all consumer and commercial TDRs. Impaired loans exclude nonperforming consumer loans and nonperforming commercial leases unless they are classified as TDRs. Loans accounted for under the fair value option are also excluded. PCI loans are excluded and reported separately on page 137 . For more information, see Note 1 – Summary of Significant Accounting Principles . Consumer Real Estate Impaired consumer real estate loans within the Consumer Real Estate portfolio segment consist entirely of TDRs. Excluding PCI loans, most modifications of consumer real estate loans meet the definition of TDRs when a binding offer is extended to a borrower. Modifications of consumer real estate loans are done in accordance with government programs or the Corporation’s proprietary programs. These modifications are considered to be TDRs if concessions have been granted to borrowers experiencing financial difficulties. Concessions may include reductions in interest rates, capitalization of past due amounts, principal and/or interest forbearance, payment extensions, principal and/or interest forgiveness, or combinations thereof. Prior to permanently modifying a loan, the Corporation may enter into trial modifications with certain borrowers under both government and proprietary programs. Trial modifications generally represent a three- to four-month period during which the borrower makes monthly payments under the anticipated modified payment terms. Upon successful completion of the trial period, the Corporation and the borrower enter into a permanent modification. Binding trial modifications are classified as TDRs when the trial offer is made and continue to be classified as TDRs regardless of whether the borrower enters into a permanent modification. Consumer real estate loans that have been discharged in Chapter 7 bankruptcy with no change in repayment terms and not reaffirmed by the borrower of $1.2 billion were included in TDRs at December 31, 2017 , of which $358 million were classified as nonperforming and $419 million were loans fully-insured by the FHA. For more information on loans discharged in Chapter 7 bankruptcy, see Nonperforming Loans and Leases in this Note. Consumer real estate TDRs are measured primarily based on the net present value of the estimated cash flows discounted at the loan’s original effective interest rate. If the carrying value of a TDR exceeds this amount, a specific allowance is recorded as a component of the allowance for loan and lease losses. Alternatively, consumer real estate TDRs that are considered to be dependent solely on the collateral for repayment (e.g., due to the lack of income verification) are measured based on the estimated fair value of the collateral and a charge-off is recorded if the carrying value exceeds the fair value of the collateral. Consumer real estate loans that reached 180 days past due prior to modification had been charged off to their net realizable value, less costs to sell, before they were modified as TDRs in accordance with established policy. Therefore, modifications of consumer real estate loans that are 180 or more days past due as TDRs do not have an impact on the allowance for loan and lease losses nor are additional charge-offs required at the time of modification. Subsequent declines in the fair value of the collateral after a loan has reached 180 days past due are recorded as charge-offs. Fully-insured loans are protected against principal loss, and therefore, the Corporation does not record an allowance for loan and lease losses on the outstanding principal balance, even after they have been modified in a TDR. At December 31, 2017 and 2016 , remaining commitments to lend additional funds to debtors whose terms have been modified in a consumer real estate TDR were immaterial. Consumer real estate foreclosed properties totaled $236 million and $363 million at December 31, 2017 and 2016 . The carrying value of consumer real estate loans, including fully-insured and PCI loans, for which formal foreclosure proceedings were in process at December 31, 2017 was $3.6 billion . During 2017 and 2016 , the Corporation reclassified $815 million and $1.4 billion of consumer real estate loans to foreclosed properties or, for properties acquired upon foreclosure of certain government-guaranteed loans (principally FHA-insured loans), to other assets. The reclassifications represent non-cash investing activities and, accordingly, are not reflected in the Consolidated Statement of Cash Flows. The following table provides the unpaid principal balance, carrying value and related allowance at December 31, 2017 and 2016 , and the average carrying value and interest income recognized for 2017 , 2016 and 2015 for impaired loans in the Corporation’s Consumer Real Estate portfolio segment. Certain impaired consumer real estate loans do not have a related allowance as the current valuation of these impaired loans exceeded the carrying value, which is net of previously recorded charge-offs. Impaired Loans – Consumer Real Estate Unpaid Balance Carrying Value Related Allowance Unpaid Balance Carrying Value Related Allowance (Dollars in millions) December 31, 2017 December 31, 2016 With no recorded allowance Residential mortgage $ 8,856 $ 6,870 $ — $ 11,151 $ 8,695 $ — Home equity 3,622 1,956 — 3,704 1,953 — With an allowance recorded Residential mortgage $ 2,908 $ 2,828 $ 174 $ 4,041 $ 3,936 $ 219 Home equity 972 900 174 910 824 137 Total Residential mortgage $ 11,764 $ 9,698 $ 174 $ 15,192 $ 12,631 $ 219 Home equity 4,594 2,856 174 4,614 2,777 137 Average Interest (1) Average Interest (1) Average Interest (1) 2017 2016 2015 With no recorded allowance Residential mortgage $ 7,737 $ 311 $ 10,178 $ 360 $ 13,867 $ 403 Home equity 1,997 109 1,906 90 1,777 89 With an allowance recorded Residential mortgage $ 3,414 $ 123 $ 5,067 $ 167 $ 7,290 $ 236 Home equity 858 24 852 24 785 24 Total Residential mortgage $ 11,151 $ 434 $ 15,245 $ 527 $ 21,157 $ 639 Home equity 2,855 133 2,758 114 2,562 113 (1) Interest income recognized includes interest accrued and collected on the outstanding balances of accruing impaired loans as well as interest cash collections on nonaccruing impaired loans for which the principal is considered collectible. The table below presents the December 31, 2017 , 2016 and 2015 unpaid principal balance, carrying value, and average pre- and post-modification interest rates on consumer real estate loans that were modified in TDRs during 2017 , 2016 and 2015 , and net charge-offs recorded during the period in which the modification occurred. The following Consumer Real Estate portfolio segment tables include loans that were initially classified as TDRs during the period and also loans that had previously been classified as TDRs and were modified again during the period. Consumer Real Estate – TDRs Entered into During 2017, 2016 and 2015 (1) Unpaid Principal Balance Carrying Value Pre-Modification Interest Rate Post-Modification Interest Rate (2) Net Charge-offs (3) (Dollars in millions) December 31, 2017 2017 Residential mortgage $ 824 $ 712 4.43 % 4.16 % $ 6 Home equity 764 590 4.22 3.49 42 Total $ 1,588 $ 1,302 4.33 3.83 $ 48 December 31, 2016 2016 Residential mortgage $ 1,130 $ 1,017 4.73 % 4.16 % $ 11 Home equity 849 649 3.95 2.72 61 Total $ 1,979 $ 1,666 4.40 3.54 $ 72 December 31, 2015 2015 Residential mortgage $ 2,986 $ 2,655 4.98 % 4.43 % $ 97 Home equity 1,019 775 3.54 3.17 84 Total $ 4,005 $ 3,430 4.61 4.11 $ 181 (1) During 2017 , there was no forgiveness of principal related to residential mortgage loans in connection with TDRs compared to $13 million and $396 million during 2016 and 2015 . (2) The post-modification interest rate reflects the interest rate applicable only to permanently completed modifications, which exclude loans that are in a trial modification period. (3) Net charge-offs include amounts recorded on loans modified during the period that are no longer held by the Corporation at December 31, 2017, 2016 and 2015 due to sales and other dispositions. The table below presents the December 31, 2017 , 2016 and 2015 carrying value for consumer real estate loans that were modified in a TDR during 2017 , 2016 and 2015 , by type of modification. Consumer Real Estate – Modification Programs TDRs Entered into During (Dollars in millions) 2017 2016 2015 Modifications under government programs Contractual interest rate reduction $ 59 $ 151 $ 431 Principal and/or interest forbearance 4 13 11 Other modifications (1) 22 23 46 Total modifications under government programs 85 187 488 Modifications under proprietary programs Contractual interest rate reduction 281 235 219 Capitalization of past due amounts 63 40 79 Principal and/or interest forbearance 38 72 168 Other modifications (1) 55 75 129 Total modifications under proprietary programs 437 422 595 Trial modifications 569 831 1,968 Loans discharged in Chapter 7 bankruptcy (2) 211 226 379 Total modifications $ 1,302 $ 1,666 $ 3,430 (1) Includes other modifications such as term or payment extensions and repayment plans. (2) Includes loans discharged in Chapter 7 bankruptcy with no change in repayment terms that are classified as TDRs. The table below presents the carrying value of consumer real estate loans that entered into payment default during 2017 , 2016 and 2015 that were modified in a TDR during the 12 months preceding payment default. A payment default for consumer real estate TDRs is recognized when a borrower has missed three monthly payments (not necessarily consecutively) since modification. Consumer Real Estate – TDRs Entering Payment Default that were Modified During the Preceding 12 Months (Dollars i

Allowance for Credit Losses

Allowance for Credit Losses	12 Months Ended
	Dec. 31, 2017
Receivables [Abstract]
Allowance for Credit Losses	Allowance for Credit Losses The table below summarizes the changes in the allowance for credit losses by portfolio segment for 2017 , 2016 and 2015 . Consumer Real Estate (1) Credit Card and Other Consumer Commercial Total Allowance (Dollars in millions) 2017 Allowance for loan and lease losses, January 1 $ 2,750 $ 3,229 $ 5,258 $ 11,237 Loans and leases charged off (770 ) (3,774 ) (1,075 ) (5,619 ) Recoveries of loans and leases previously charged off 657 809 174 1,640 Net charge-offs (2) (113 ) (2,965 ) (901 ) (3,979 ) Write-offs of PCI loans (3) (207 ) — — (207 ) Provision for loan and lease losses (4) (710 ) 3,437 654 3,381 Other (5) — (38 ) (1 ) (39 ) Allowance for loan and lease losses, December 31 1,720 3,663 5,010 10,393 Reserve for unfunded lending commitments, January 1 — — 762 762 Provision for unfunded lending commitments — — 15 15 Reserve for unfunded lending commitments, December 31 — — 777 777 Allowance for credit losses, December 31 $ 1,720 $ 3,663 $ 5,787 $ 11,170 2016 Allowance for loan and lease losses, January 1 $ 3,914 $ 3,471 $ 4,849 $ 12,234 Loans and leases charged off (1,155 ) (3,553 ) (740 ) (5,448 ) Recoveries of loans and leases previously charged off 619 770 238 1,627 Net charge-offs (2) (536 ) (2,783 ) (502 ) (3,821 ) Write-offs of PCI loans (3) (340 ) — — (340 ) Provision for loan and lease losses (4) (258 ) 2,826 1,013 3,581 Other (5) (30 ) (42 ) (102 ) (174 ) Total allowance for loan and lease losses, December 31 2,750 3,472 5,258 11,480 Less: Allowance included in assets of business held for sale (6) — (243 ) — (243 ) Allowance for loan and lease losses, December 31 2,750 3,229 5,258 11,237 Reserve for unfunded lending commitments, January 1 — — 646 646 Provision for unfunded lending commitments — — 16 16 Other (5) — — 100 100 Reserve for unfunded lending commitments, December 31 — — 762 762 Allowance for credit losses, December 31 $ 2,750 $ 3,229 $ 6,020 $ 11,999 2015 Allowance for loan and lease losses, January 1 $ 5,935 $ 4,047 $ 4,437 $ 14,419 Loans and leases charged off (1,841 ) (3,620 ) (644 ) (6,105 ) Recoveries of loans and leases previously charged off 732 813 222 1,767 Net charge-offs (1,109 ) (2,807 ) (422 ) (4,338 ) Write-offs of PCI loans (3) (808 ) — — (808 ) Provision for loan and lease losses (4) (70 ) 2,278 835 3,043 Other (5) (34 ) (47 ) (1 ) (82 ) Allowance for loan and lease losses, December 31 3,914 3,471 4,849 12,234 Reserve for unfunded lending commitments, January 1 — — 528 528 Provision for unfunded lending commitments — — 118 118 Reserve for unfunded lending commitments, December 31 — — 646 646 Allowance for credit losses, December 31 $ 3,914 $ 3,471 $ 5,495 $ 12,880 (1) Includes valuation allowance associated with the PCI loan portfolio. (2) Includes net charge-offs related to the non-U.S. credit card loan portfolio, which was included in assets of business held for sale on the Consolidated Balance Sheet at December 31, 2016. In 2017, the Corporation sold its non-U.S. consumer credit card business. (3) Includes write-offs of $87 million , $60 million and $234 million associated with the sale of PCI loans in 2017 , 2016 and 2015 , respectively. (4) Includes provision expense of $76 million and a benefit of $45 million and $40 million associated with the PCI loan portfolio in 2017 , 2016 and 2015 , respectively. (5) Primarily represents the net impact of portfolio sales, consolidations and deconsolidations, foreign currency translation adjustments, transfers to held-for-sale and certain other reclassifications. (6) Represents allowance for loan and lease losses related to the non-U.S. credit card loan portfolio, which was sold in 2017. The table below presents the allowance and the carrying value of outstanding loans and leases by portfolio segment at December 31, 2017 and 2016 . Allowance and Carrying Value by Portfolio Segment Consumer Credit Card and Other Consumer Commercial Total (Dollars in millions) December 31, 2017 Impaired loans and troubled debt restructurings (1) Allowance for loan and lease losses (2) $ 348 $ 125 $ 190 $ 663 Carrying value (3) 12,554 490 2,407 15,451 Allowance as a percentage of carrying value 2.77 % 25.51 % 7.89 % 4.29 % Loans collectively evaluated for impairment Allowance for loan and lease losses $ 1,083 $ 3,538 $ 4,820 $ 9,441 Carrying value (3, 4) 238,284 192,303 474,284 904,871 Allowance as a percentage of carrying value (4) 0.45 % 1.84 % 1.02 % 1.04 % Purchased credit-impaired loans Valuation allowance $ 289 n/a n/a $ 289 Carrying value gross of valuation allowance 10,717 n/a n/a 10,717 Valuation allowance as a percentage of carrying value 2.70 % n/a n/a 2.70 % Total Allowance for loan and lease losses $ 1,720 $ 3,663 $ 5,010 $ 10,393 Carrying value (3, 4) 261,555 192,793 476,691 931,039 Allowance as a percentage of carrying value (4) 0.66 % 1.90 % 1.05 % 1.12 % December 31, 2016 Impaired loans and troubled debt restructurings (1) Allowance for loan and lease losses (2) $ 356 $ 189 $ 273 $ 818 Carrying value (3) 15,408 610 3,202 19,220 Allowance as a percentage of carrying value 2.31 % 30.98 % 8.53 % 4.26 % Loans collectively evaluated for impairment Allowance for loan and lease losses $ 1,975 $ 3,283 $ 4,985 $ 10,243 Carrying value (3, 4) 229,094 197,470 449,290 875,854 Allowance as a percentage of carrying value (4) 0.86 % 1.66 % 1.11 % 1.17 % Purchased credit-impaired loans Valuation allowance $ 419 n/a n/a $ 419 Carrying value gross of valuation allowance 13,738 n/a n/a 13,738 Valuation allowance as a percentage of carrying value 3.05 % n/a n/a 3.05 % Less: Assets of business held for sale (5) Allowance for loan and lease losses (6) n/a $ (243 ) n/a $ (243 ) Carrying value (3) n/a (9,214 ) n/a (9,214 ) Total Allowance for loan and lease losses $ 2,750 $ 3,229 $ 5,258 $ 11,237 Carrying value (3, 4) 258,240 188,866 452,492 899,598 Allowance as a percentage of carrying value (4) 1.06 % 1.71 % 1.16 % 1.25 % (1) Impaired loans include nonperforming commercial loans and all TDRs, including both commercial and consumer TDRs. Impaired loans exclude nonperforming consumer loans unless they are TDRs, and all consumer and commercial loans accounted for under the fair value option. (2) Allowance for loan and lease losses includes $27 million related to impaired U.S. small business commercial at both December 31, 2017 and 2016 . (3) Amounts are presented gross of the allowance for loan and lease losses. (4) Outstanding loan and lease balances and ratios do not include loans accounted for under the fair value option of $5.7 billion and $7.1 billion at December 31, 2017 and 2016 . (5) Represents allowance for loan and lease losses and loans related to the non-U.S. credit card loan portfolio, which was included in assets of business held for sale on the Consolidated Balance Sheet at December 31, 2016 . In 2017, the Corporation sold its non-U.S. consumer credit card business. (6) Includes $61 million of allowance for loan and lease losses related to impaired loans and TDRs and $ 182 million related to loans collectively evaluated for impairment at December 31, 2016 . n/a = not applicable

Securitizations and Other Varia

Securitizations and Other Variable Interest Entities	12 Months Ended
	Dec. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Securitizations and Other Variable Interest Entities	Securitizations and Other Variable Interest Entities The Corporation utilizes VIEs in the ordinary course of business to support its own and its customers’ financing and investing needs. The Corporation routinely securitizes loans and debt securities using VIEs as a source of funding for the Corporation and as a means of transferring the economic risk of the loans or debt securities to third parties. The assets are transferred into a trust or other securitization vehicle such that the assets are legally isolated from the creditors of the Corporation and are not available to satisfy its obligations. These assets can only be used to settle obligations of the trust or other securitization vehicle. The Corporation also administers, structures or invests in other VIEs including CDOs, investment vehicles and other entities. For more information on the Corporation’s use of VIEs, see Note 1 – Summary of Significant Accounting Principles . The tables in this Note present the assets and liabilities of consolidated and unconsolidated VIEs at December 31, 2017 and 2016 in situations where the Corporation has continuing involvement with transferred assets or if the Corporation otherwise has a variable interest in the VIE. The tables also present the Corporation’s maximum loss exposure at December 31, 2017 and 2016 resulting from its involvement with consolidated VIEs and unconsolidated VIEs in which the Corporation holds a variable interest. The Corporation’s maximum loss exposure is based on the unlikely event that all of the assets in the VIEs become worthless and incorporates not only potential losses associated with assets recorded on the Consolidated Balance Sheet but also potential losses associated with off-balance sheet commitments, such as unfunded liquidity commitments and other contractual arrangements. The Corporation’s maximum loss exposure does not include losses previously recognized through write-downs of assets. The Corporation invests in ABS issued by third-party VIEs with which it has no other form of involvement and enters into certain commercial lending arrangements that may also incorporate the use of VIEs, for example to hold collateral. These securities and loans are included in Note 3 – Securities or Note 4 – Outstanding Loans and Leases . In addition, the Corporation uses VIEs such as trust preferred securities trusts in connection with its funding activities. For more information, see Note 11 – Long-term Debt . These VIEs, which are generally not consolidated by the Corporation, as applicable, are not included in the tables herein. Except as described below, the Corporation did not provide financial support to consolidated or unconsolidated VIEs during 2017 , 2016 and 2015 that it was not previously contractually required to provide, nor does it intend to do so. First-lien Mortgage Securitizations First-lien Mortgages As part of its mortgage banking activities, the Corporation securitizes a portion of the first-lien residential mortgage loans it originates or purchases from third parties, generally in the form of RMBS guaranteed by government-sponsored enterprises, FNMA and FHLMC (collectively the GSEs), or the Government National Mortgage Association (GNMA) primarily in the case of FHA-insured and U.S. Department of Veterans Affairs (VA)-guaranteed mortgage loans. Securitization usually occurs in conjunction with or shortly after origination or purchase, and the Corporation may also securitize loans held in its residential mortgage portfolio. In addition, the Corporation may, from time to time, securitize commercial mortgages it originates or purchases from other entities. The Corporation typically services the loans it securitizes. Further, the Corporation may retain beneficial interests in the securitization trusts including senior and subordinate securities and equity tranches issued by the trusts. Except as described below and in Note 7 – Representations and Warranties Obligations and Corporate Guarantees , the Corporation does not provide guarantees or recourse to the securitization trusts other than standard representations and warranties. The table below summarizes select information related to first-lien mortgage securitizations for 2017 , 2016 and 2015 . First-lien Mortgage Securitizations Residential Mortgage - Agency Commercial Mortgage (Dollars in millions) 2017 2016 2015 2017 2016 2015 Cash proceeds from new securitizations (1) $ 14,467 $ 24,201 $ 27,164 $ 5,641 $ 3,887 $ 7,945 Gains on securitizations (2) 158 370 894 91 38 49 Repurchases from securitization trusts (3) 2,713 3,611 3,716 — — — (1) The Corporation transfers residential mortgage loans to securitizations sponsored by the GSEs or GNMA in the normal course of business and receives RMBS in exchange which may then be sold into the market to third-party investors for cash proceeds. (2) A majority of the first-lien residential mortgage loans securitized are initially classified as LHFS and accounted for under the fair value option. Gains recognized on these LHFS prior to securitization, which totaled $243 million , $487 million and $750 million net of hedges, during 2017 , 2016 and 2015 , respectively, are not included in the table above. (3) The Corporation may have the option to repurchase delinquent loans out of securitization trusts, which reduces the amount of servicing advances it is required to make. The Corporation may also repurchase loans from securitization trusts to perform modifications. Repurchased loans include FHA-insured mortgages collateralizing GNMA securities. In addition to cash proceeds as reported in the table above, the Corporation received securities with an initial fair value of $1.9 billion , $4.2 billion and $22.3 billion in connection with first-lien mortgage securitizations in 2017 , 2016 and 2015 . The receipt of these securities represents non-cash operating and investing activities and, accordingly, is not reflected in the Consolidated Statement of Cash Flows. Substantially all of these securities were initially classified as Level 2 assets within the fair value hierarchy. During 2017 , 2016 and 2015 , there were no changes to the initial classification. The Corporation recognizes consumer MSRs from the sale or securitization of consumer real estate loans. The unpaid principal balance of loans serviced for investors, including residential mortgage and home equity loans, totaled $277.6 billion and $326.2 billion at December 31, 2017 and 2016 . Servicing fee and ancillary fee income on serviced loans was $893 million , $1.2 billion and $1.4 billion in 2017 , 2016 and 2015 . Servicing advances on serviced loans, including loans serviced for others and loans held for investment, were $4.5 billion and $6.2 billion at December 31, 2017 and 2016 . For more information on MSRs, see Note 20 – Fair Value Measurements . During 2016 and 2015 , the Corporation deconsolidated agency residential mortgage securitization vehicles with total assets of $3.8 billion and $4.5 billion , and total liabilities of $628 million and $0 following the sale of retained interests to third parties, after which the Corporation no longer had the unilateral ability to liquidate the vehicles. Of the balances deconsolidated in 2016, $ 706 million of assets and $ 628 million of liabilities represent non-cash investing and financing activities and, accordingly, are not reflected on the Consolidated Statement of Cash Flows. Gains on sale of $125 million and $287 million in 2016 and 2015 related to these deconsolidations were recorded in other income in the Consolidated Statement of Income. There were no deconsolidations of agency residential mortgage securitizations in 2017 . The table below summarizes select information related to first-lien mortgage securitization trusts in which the Corporation held a variable interest at December 31, 2017 and 2016 . First-lien Mortgage VIEs Residential Mortgage Non-agency Agency Prime Subprime Alt-A Commercial Mortgage December 31 (Dollars in millions) 2017 2016 2017 2016 2017 2016 2017 2016 2017 2016 Unconsolidated VIEs Maximum loss exposure (1) $ 19,110 $ 22,661 $ 689 $ 757 $ 2,643 $ 2,750 $ 403 $ 560 $ 585 $ 344 On-balance sheet assets Senior securities: Trading account assets $ 716 $ 1,399 $ 6 $ 20 $ 10 $ 112 $ 50 $ 118 $ 108 $ 51 Debt securities carried at fair value 15,036 17,620 477 441 2,221 2,235 351 305 — — Held-to-maturity securities 3,348 3,630 — — — — — — 274 64 Subordinate securities — — 5 9 38 25 2 24 69 81 Residual interests — — — — — — — — 19 25 All other assets (2) 10 12 — 28 — — — 113 — — Total retained positions $ 19,110 $ 22,661 $ 488 $ 498 $ 2,269 $ 2,372 $ 403 $ 560 $ 470 $ 221 Principal balance outstanding (3) $ 232,761 $ 265,332 $ 10,549 $ 16,280 $ 10,254 $ 19,373 $ 28,129 $ 35,788 $ 26,504 $ 23,826 Consolidated VIEs Maximum loss exposure (1) $ 14,502 $ 18,084 $ 571 $ — $ — $ — $ — $ 25 $ — $ — On-balance sheet assets Trading account assets $ 232 $ 434 $ 571 $ — $ — $ — $ — $ 99 $ — $ — Loans and leases, net 14,030 17,223 — — — — — — — — All other assets 240 427 — — — — — — — — Total assets $ 14,502 $ 18,084 $ 571 $ — $ — $ — $ — $ 99 $ — $ — On-balance sheet liabilities Long-term debt $ — $ — $ — $ — $ — $ — $ — $ 74 $ — $ — All other liabilities 3 4 — — — — — — — — Total liabilities $ 3 $ 4 $ — $ — $ — $ — $ — $ 74 $ — $ — (1) Maximum loss exposure includes obligations under loss-sharing reinsurance and other arrangements for non-agency residential mortgage and commercial mortgage securitizations, but excludes the reserve for representations and warranties obligations and corporate guarantees and also excludes servicing advances and other servicing rights and obligations. For more information, see Note 7 – Representations and Warranties Obligations and Corporate Guarantees and Note 20 – Fair Value Measurements . (2) Not included in the table above are all other assets of $148 million and $189 million , representing the unpaid principal balance of mortgage loans eligible for repurchase from unconsolidated residential mortgage securitization vehicles, principally guaranteed by GNMA, and all other liabilities of $148 million and $189 million , representing the principal amount that would be payable to the securitization vehicles if the Corporation was to exercise the repurchase option, at December 31, 2017 and 2016 . (3) Principal balance outstanding includes loans where the Corporation was the transferor to securitization vehicles with which it has continuing involvement, which may include servicing the loans. Other Asset-backed Securitizations The table below summarizes select information related to home equity loan, credit card and other asset-backed VIEs in which the Corporation held a variable interest at December 31, 2017 and 2016 . Home Equity Loan, Credit Card and Other Asset-backed VIEs Home Equity Loan (1) Credit Card (2, 3) Resecuritization Trusts Municipal Bond Trusts December 31 (Dollars in millions) 2017 2016 2017 2016 2017 2016 2017 2016 Unconsolidated VIEs Maximum loss exposure $ 1,522 $ 2,732 $ — $ — $ 8,204 $ 9,906 $ 1,631 $ 1,635 On-balance sheet assets Senior securities (4) : Trading account assets $ — $ — $ — $ — $ 869 $ 902 $ 33 $ — Debt securities carried at fair value 36 46 — — 1,661 2,338 — — Held-to-maturity securities — — — — 5,644 6,569 — — Subordinate securities (4) — — — — 30 97 — — Total retained positions $ 36 $ 46 $ — $ — $ 8,204 $ 9,906 $ 33 $ — Total assets of VIEs (5) $ 2,432 $ 4,274 $ — $ — $ 19,281 $ 22,155 $ 2,287 $ 2,406 Consolidated VIEs Maximum loss exposure $ 112 $ 149 $ 24,337 $ 25,859 $ 628 $ 420 $ 1,453 $ 1,442 On-balance sheet assets Trading account assets $ — $ — $ — $ — $ 1,557 $ 1,428 $ 1,452 $ 1,454 Loans and leases 177 244 32,554 35,135 — — — — Allowance for loan and lease losses (9 ) (16 ) (988 ) (1,007 ) — — — — All other assets 6 7 1,385 793 — — 1 — Total assets $ 174 $ 235 $ 32,951 $ 34,921 $ 1,557 $ 1,428 $ 1,453 $ 1,454 On-balance sheet liabilities Short-term borrowings $ — $ — $ — $ — $ — $ — $ 312 $ 348 Long-term debt 76 108 8,598 9,049 929 1,008 — 12 All other liabilities — — 16 13 — — — — Total liabilities $ 76 $ 108 $ 8,614 $ 9,062 $ 929 $ 1,008 $ 312 $ 360 (1) For unconsolidated home equity loan VIEs, the maximum loss exposure includes outstanding trust certificates issued by trusts in rapid amortization, net of recorded reserves. For both consolidated and unconsolidated home equity loan VIEs, the maximum loss exposure excludes the reserve for representations and warranties obligations and corporate guarantees. For more information, see Note 7 – Representations and Warranties Obligations and Corporate Guarantees . (2) At December 31, 2017 and 2016 , loans and leases in the consolidated credit card trust included $15.6 billion and $17.6 billion of seller’s interest. (3) At December 31, 2017 and 2016 , all other assets in the consolidated credit card trust included restricted cash, certain short-term investments, and unbilled accrued interest and fees. (4) The retained senior and subordinate securities were valued using quoted market prices or observable market inputs (Level 2 of the fair value hierarchy). (5) Total assets include loans the Corporation transferred with which it has continuing involvement, which may include servicing the loan. Home Equity Loans The Corporation retains interests in home equity securitization trusts to which it transferred home equity loans. These retained interests primarily include senior securities. In addition, the Corporation may be obligated to provide subordinate funding to the trusts during a rapid amortization event. This obligation is included in the maximum loss exposure in the table above. The charges that will ultimately be recorded as a result of the rapid amortization events depend on the undrawn portion of the home equity lines of credit (HELOCs), performance of the loans, the amount of subsequent draws and the timing of related cash flows. During 2015 , the Corporation deconsolidated several HELOC trusts with total assets of $488 million and total liabilities of $611 million as its obligation to provide subordinated funding is no longer considered to be a potentially significant variable interest in the trusts following a decline in the amount of credit available to be drawn by borrowers. In connection with deconsolidation, the Corporation recorded a gain of $123 million in other income in the Consolidated Statement of Income. The derecognition of assets and liabilities represents non-cash investing and financing activities and, accordingly, is not reflected on the Consolidated Statement of Cash Flows. There were no deconsolidations of HELOC trusts in 2017 or 2016. Credit Card Securitizations The Corporation securitizes originated and purchased credit card loans. The Corporation’s continuing involvement with the securitization trust includes servicing the receivables, retaining an undivided interest (seller’s interest) in the receivables, and holding certain retained interests including subordinate interests in accrued interest and fees on the securitized receivables and cash reserve accounts. During 2017 , 2016 and 2015 , new senior debt securities issued to third-party investors from the credit card securitization trust were $ 3.1 billion , $750 million and $ 2.3 billion . At December 31, 2017 and 2016 , the Corporation held subordinate securities issued by the credit card securitization trust with a notional principal amount of $7.4 billion and $7.5 billion . These securities serve as a form of credit enhancement to the senior debt securities and have a stated interest rate of zero percent . During 2017 , 2016 and 2015 , the credit card securitization trust issued $500 million , $121 million and $371 million of these subordinate securities. Resecuritization Trusts The Corporation transfers securities, typically MBS, into resecuritization vehicles at the request of customers seeking securities with specific characteristics. Generally, there are no significant ongoing activities performed in a resecuritization trust, and no single investor has the unilateral ability to liquidate the trust. The Corporation resecuritized $25.1 billion , $23.4 billion and $30.7 billion of securities in 2017 , 2016 and 2015 . Securities transferred into resecuritization vehicles during 2017 , 2016 and 2015 were measured at fair value with changes in fair value recorded in trading account profits prior to the resecuritization and no gain or loss on sale was recorded. During 2017 , 2016 and 2015 , resecuritization proceeds included securities with an initial fair value of $3.3 billion , $3.3 billion and $9.8 billion , including $6.9 billion which were classified as HTM during 2015 . Substantially all of the other securities received as resecuritization proceeds were classified as trading securities and were categorized as Level 2 within the fair value hierarchy. Municipal Bond Trusts The Corporation administers municipal bond trusts that hold highly-rated, long-term, fixed-rate municipal bonds. The trusts obtain financing by issuing floating-rate trust certificates that reprice on a weekly or other short-term basis to third-party investors. The Corporation’s liquidity commitments to unconsolidated municipal bond trusts, including those for which the Corporation was transferor, totaled $1.6 billion at both December 31, 2017 and 2016 . The weighted-average remaining life of bonds held in the trusts at December 31, 2017 was 6.0 years. There were no material write-downs or downgrades of assets or issuers during 2017 , 2016 and 2015 . Other Variable Interest Entities The table below summarizes select information related to other VIEs in which the Corporation held a variable interest at December 31, 2017 and 2016 . Other VIEs Consolidated Unconsolidated Total Consolidated Unconsolidated Total December 31 (Dollars in millions) 2017 2016 Maximum loss exposure $ 4,660 $ 19,785 $ 24,445 $ 6,114 $ 17,754 $ 23,868 On-balance sheet assets Trading account assets $ 2,709 $ 346 $ 3,055 $ 2,358 $ 233 $ 2,591 Debt securities carried at fair value — 160 160 — 122 122 Loans and leases 2,152 3,596 5,748 3,399 3,249 6,648 Allowance for loan and lease losses (3 ) (32 ) (35 ) (9 ) (24 ) (33 ) Loans held-for-sale 27 940 967 188 464 652 All other assets 62 14,276 14,338 369 13,156 13,525 Total $ 4,947 $ 19,286 $ 24,233 $ 6,305 $ 17,200 $ 23,505 On-balance sheet liabilities Long-term debt (1) $ 270 $ — $ 270 $ 395 $ — $ 395 All other liabilities 18 3,417 3,435 24 2,959 2,983 Total $ 288 $ 3,417 $ 3,705 $ 419 $ 2,959 $ 3,378 Total assets of VIEs $ 4,947 $ 69,746 $ 74,693 $ 6,305 $ 62,269 $ 68,574 (1) Includes $1 million and $229 million of long-term debt at December 31, 2017 and 2016 issued by other consolidated VIEs, which has recourse to the general credit of the Corporation. Customer Vehicles Customer vehicles include credit-linked, equity-linked and commodity-linked note vehicles, repackaging vehicles, and asset acquisition vehicles, which are typically created on behalf of customers who wish to obtain market or credit exposure to a specific company, index, commodity or financial instrument. The Corporation’s maximum loss exposure to consolidated and unconsolidated customer vehicles totaled $2.3 billion and $2.9 billion at December 31, 2017 and 2016 , including the notional amount of derivatives to which the Corporation is a counterparty, net of losses previously recorded, and the Corporation’s investment, if any, in securities issued by the vehicles. The Corporation also had liquidity commitments, including written put options and collateral value guarantees, with certain unconsolidated vehicles of $442 million and $323 million at December 31, 2017 and 2016 , that are included in the table above. Collateralized Debt Obligation Vehicles The Corporation receives fees for structuring CDO vehicles, which hold diversified pools of fixed-income securities, typically corporate debt or ABS, which the CDO vehicles fund by issuing multiple tranches of debt and equity securities. CDOs are generally managed by third-party portfolio managers. The Corporation typically transfers assets to these CDOs, holds securities issued by the CDOs and may be a derivative counterparty to the CDOs. The Corporation’s maximum loss exposure to consolidated and unconsolidated CDOs totaled $358 million and $430 million at December 31, 2017 and 2016 . Investment Vehicles The Corporation sponsors, invests in or provides financing, which may be in connection with the sale of assets, to a variety of investment vehicles that hold loans, real estate, debt securities or other financial instruments and are designed to provide the desired investment profile to investors or the Corporation. At December 31, 2017 and 2016 , the Corporation’s consolidated investment vehicles had total assets of $249 million and $846 million . The Corporation also held investments in unconsolidated vehicles with total assets of $20.3 billion and $17.3 billion at December 31, 2017 and 2016 . The Corporation’s maximum loss exposure associated with both consolidated and unconsolidated investment vehicles totaled $5.7 billion and $5.1 billion at December 31, 2017 and 2016 comprised primarily of on-balance sheet assets less non-recourse liabilities. In prior periods, the Corporation transferred servicing advance receivables to independent third parties in connection with the sale of MSRs. Portions of the receivables were transferred into unconsolidated securitization trusts. The Corporation retained senior interests in such receivables with a maximum loss exposure and funding obligation of $50 million and $150 million , including a funded balance of $39 million and $75 million at December 31, 2017 and 2016 , which were classified in other debt securities carried at fair value. Leveraged Lease Trusts The Corporation’s net investment in consolidated leveraged lease trusts totaled $2.0 billion and $2.6 billion at December 31, 2017 and 2016 . The trusts hold long-lived equipment such as rail cars, power generation and distribution equipment, and commercial aircraft. The Corporation structures the trusts and holds a significant residual interest. The net investment represents the Corporation’s maximum loss exposure to the trusts in the unlikely event that the leveraged lease investments become worthless. Debt issued by the leveraged lease trusts is non-recourse to the Corporation. Tax Credit Vehicles The Corporation holds investments in unconsolidated limited partnerships and similar entities that construct, own and operate affordable housing, wind and solar projects. An unrelated third party is typically the general partner or managing member and has control over the significant activities of the vehicle. The Corporation earns a return primarily through the receipt of tax credits allocated to the projects. The maximum loss exposure included in the Other VIEs table was $13.8 billion and $12.6 billion at December 31, 2017 and 2016 . The Corporation’s risk of loss is generally mitigated by policies requiring that the project qualify for the expected tax credits prior to making its investment. The Corporation’s investments in affordable housing partnerships, which are reported in other assets on the Consolidated Balance Sheet, totaled $8.0 billion and $7.4 billion , including unfunded commitments to provide capital contributions of $3.1 billion and $2.7 billion at December 31, 2017 and 2016 . The unfunded commitments are expected to be paid over the next 5 years . During 2017 , 2016 and 2015 , the Corporation recognized tax credits and other tax benefits from investments in affordable housing partnerships of $1.0 billion , $1.1 billion and $928 million and reported pre-tax losses in other noninterest income of $766 million , $789 million and $629 million , respectively. Tax credits are recognized as part of the Corporation’s annual effective tax rate used to determine tax expense in a given quarter. Accordingly, the portion of a year’s expected tax benefits recognized in any given quarter may differ from 25 percent . The Corporation may from time to time be asked to invest additional amounts to support a troubled affordable housing project. Such additional investments have not been and are not expected to be significant.

Representations and Warranties

Representations and Warranties Obligations and Corporate Guarantees	12 Months Ended
	Dec. 31, 2017
Representations and Warranties Obligations and Corporate Guarantees [Abstract]
Representations and Warranties Obligations and Corporate Guarantees	Representations and Warranties Obligations and Corporate Guarantees The Corporation securitizes first-lien residential mortgage loans generally in the form of RMBS guaranteed by the GSEs or by GNMA in the case of FHA-insured, VA-guaranteed and Rural Housing Service-guaranteed mortgage loans, and sells pools of first-lien residential mortgage loans in the form of whole loans. In addition, in prior years, legacy companies and certain subsidiaries sold pools of first-lien residential mortgage loans and home equity loans as private-label securitizations or in the form of whole loans. In connection with these transactions, the Corporation or certain of its subsidiaries or legacy companies make and have made various representations and warranties. Breaches of these representations and warranties have resulted in and may continue to result in the requirement to repurchase mortgage loans or to otherwise make whole or provide other remedies to investors, securitization trusts, guarantors, insurers or other parties (collectively, repurchases). Settlement Actions The Corporation has vigorously contested any request for repurchase where it has concluded that a valid basis for repurchase does not exist and will continue to do so in the future. However, in an effort to resolve legacy mortgage-related issues, the Corporation has reached bulk settlements, certain of which have been for significant amounts, in lieu of a loan-by-loan review process. The Corporation’s liability in connection with the transactions and claims not covered by these settlements could be material to the Corporation’s results of operations or liquidity for any particular reporting period. The Corporation may reach other settlements in the future if opportunities arise on terms it believes to be advantageous. However, there can be no assurance that the Corporation will reach future settlements or, if it does, that the terms of past settlements can be relied upon to predict the terms of future settlements. Unresolved Repurchase Claims Unresolved representations and warranties repurchase claims represent the notional amount of repurchase claims made by counterparties, typically the outstanding principal balance or the unpaid principal balance at the time of default. In the case of first-lien mortgages, the claim amount is often significantly greater than the expected loss amount due to the benefit of collateral and, in some cases, mortgage insurance or mortgage guarantee payments. Claims received from a counterparty remain outstanding until the underlying loan is repurchased, the claim is rescinded by the counterparty, the Corporation determines that the applicable statute of limitations has expired, or representations and warranties claims with respect to the applicable trust are settled, and fully and finally released. The Corporation does not include duplicate claims in the amounts disclosed. The table below presents unresolved repurchase claims at December 31, 2017 and 2016 . The unresolved repurchase claims include only claims where the Corporation believes that the counterparty has the contractual right to submit claims. The unresolved repurchase claims predominantly relate to subprime and pay option first-lien loans and home equity loans originated primarily between 2004 and 2008. For more information, see Private-label Securitizations and Whole-loan Sales Experience in this Note and Note 12 – Commitments and Contingencies . Unresolved Repurchase Claims by Counterparty, Net of Duplicate Claims December 31 (Dollars in millions) 2017 2016 By counterparty Private-label securitization trustees, whole-loan investors, including third-party securitization sponsors and other (1) $ 16,064 $ 16,685 Monolines 1,565 1,583 GSEs 5 9 Total unresolved repurchase claims by counterparty, net of duplicate claims $ 17,634 $ 18,277 (1) Includes $11.4 billion and $11.9 billion of claims based on individual file reviews and $4.7 billion and $4.8 billion of claims submitted without individual file reviews at December 31, 2017 and 2016 . During 2017 , the Corporation received $151 million in new repurchase claims and $794 million in claims were resolved, including $640 million related to settlements. Of the remaining unresolved monoline claims, substantially all of the claims pertain to second-lien loans and are currently the subject of litigation with a single monoline insurer. There may be additional claims or file requests in the future. In addition to the unresolved repurchase claims in the Unresolved Repurchase Claims by Counterparty, Net of Duplicate Claims table, the Corporation has received notifications from a sponsor of third-party securitizations with whom the Corporation engaged in whole-loan transactions indicating that the Corporation may have indemnity obligations with respect to specific loans for which the Corporation has not received a repurchase request. These notifications were received prior to 2015, and totaled $1.3 billion at both December 31, 2017 and 2016 . During 2017 , the Corporation reached agreements with certain parties requesting indemnity. One such agreement is subject to acceptance by a securitization trustee. The impact of these agreements is included in the provision and reserve for representations and warranties. The presence of repurchase claims on a given trust, receipt of notices of indemnification obligations and receipt of other communications, as discussed above, are all factors that inform the Corporation’s reserve for representations and warranties and the corresponding estimated range of possible loss. Private-label Securitizations and Whole-loan Sales Experience The notional amount of unresolved repurchase claims at December 31, 2017 and 2016 included $6.9 billion and $5.6 billion of claims related to loans in specific private-label securitization groups or tranches where the Corporation owns substantially all of the outstanding securities or will otherwise realize the benefit of any repurchase claims paid. The overall decrease in the notional amount of outstanding unresolved repurchase claims in 2017 was primarily due to claims that were resolved as a result of settlements. Outstanding repurchase claims remained unresolved primarily due to (1) the level of detail, support and analysis accompanying such claims, which impact overall claim quality and, therefore, claims resolution, and (2) the lack of an established process to resolve disputes related to these claims. The Corporation reviews properly presented repurchase claims on a loan-by-loan basis. For time-barred claims, the counterparty is informed that the claim is denied on the basis of the statute of limitations and the claim is treated as resolved. For timely claims, if the Corporation, after review, does not believe a claim is valid, it will deny the claim and generally indicate a reason for the denial. If the counterparty agrees with the Corporation’s denial of the claim, the counterparty may rescind the claim. If there is a disagreement as to the resolution of the claim, meaningful dialogue and negotiation between the parties are generally necessary to reach a resolution on an individual claim. The Corporation has performed an initial review with respect to substantially all outstanding claims and, although the Corporation does not believe a valid basis for repurchase has been established by the claimant, it considers such claims activity in the computation of its liability for representations and warranties. Reserve and Estimated Range of Possible Loss The reserve for representations and warranties and corporate guarantees is included in accrued expenses and other liabilities on the Consolidated Balance Sheet and the related provision is included in mortgage banking income in the Consolidated Statement of Income. The reserve for representations and warranties is established when those obligations are both probable and reasonably estimable. The Corporation’s representations and warranties reserve and the corresponding estimated range of possible loss at December 31, 2017 consider, among other things, the repurchase experience implied in prior settlements, and uses the experience implied in those prior settlements in the assessment for those trusts where the Corporation has a continuing possibility of timely claims in order to determine the representations and warranties reserve and the corresponding estimated range of possible loss. The table below presents a rollforward of the reserve for representations and warranties and corporate guarantees. Representations and Warranties and Corporate Guarantees (Dollars in millions) 2017 2016 Reserve for representations and warranties and corporate guarantees, January 1 $ 2,339 $ 11,326 Additions for new sales 4 4 Payments (1) (814 ) (9,097 ) Provision 393 106 Reserve for representations and warranties and corporate guarantees, December 31 $ 1,922 $ 2,339 (1) In February 2016, the Corporation made an $8.5 billion settlement payment as part of the settlement with BNY Mellon. The representations and warranties reserve represents the Corporation’s best estimate of probable incurred losses as of December 31, 2017 . However, it is reasonably possible that future representations and warranties losses may occur in excess of the amounts recorded for these exposures. The Corporation currently estimates that the range of possible loss for representations and warranties exposures could be up to $1 billion over existing accruals at December 31, 2017 . This estimate is lower than the estimate at December 31, 2016 due to recent reductions in risk as we reach settlements with counterparties. The Corporation treats claims that are time-barred as resolved and does not consider such claims in the estimated range of possible loss. The estimated range of possible loss reflects principally exposures related to loans in private-label securitization trusts, including related indemnity claims. It represents a reasonably possible loss, but 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 reserve for representations and warranties exposures and the corresponding estimated range of possible loss do not consider certain losses related to servicing, including foreclosure and related costs, fraud, indemnity, or claims (including for RMBS) related to securities law or monoline insurance litigation. Losses with respect to one or more of these matters could be material to the Corporation’s results of operations or liquidity for any particular reporting period. Future provisions and/or ranges of possible loss for representations and warranties may be significantly impacted if actual experiences are different from the Corporation’s assumptions in predictive models.

Goodwill and Intangible Assets

Goodwill and Intangible Assets	12 Months Ended
	Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets	Goodwill and Intangible Assets Goodwill The table below presents goodwill balances by business segment and All Other at December 31, 2017 and 2016 . The reporting units utilized for goodwill impairment testing are the operating segments or one level below. Goodwill December 31 (Dollars in millions) 2017 2016 Consumer Banking $ 30,123 $ 30,123 Global Wealth & Investment Management 9,677 9,681 Global Banking 23,923 23,923 Global Markets 5,182 5,197 All Other 46 820 Less: Goodwill of business held for sale (1) — (775 ) Total goodwill $ 68,951 $ 68,969 (1) Reflects the goodwill assigned to the non-U.S. consumer credit card business, which was included in assets of business held for sale on the Consolidated Balance Sheet at December 31, 2016 . In 2017 , the Corporation sold its non-U.S. consumer credit card business. During 2017 , the Corporation completed its annual goodwill impairment test as of June 30, 2017 for all applicable reporting units. Based on the results of the annual goodwill impairment test, the Corporation determined there was no impairment. Intangible Assets The table below presents the gross and net carrying values and accumulated amortization for intangible assets at December 31, 2017 and 2016 . Intangible Assets (1, 2) Gross Accumulated Net Gross Accumulated Net (Dollars in millions) December 31, 2017 December 31, 2016 Purchased credit card and affinity relationships $ 5,919 $ 5,604 $ 315 $ 6,830 $ 6,243 $ 587 Core deposit and other intangibles (3) 3,835 2,140 1,695 3,836 2,046 1,790 Customer relationships 3,886 3,584 302 3,887 3,275 612 Total intangible assets (4) $ 13,640 $ 11,328 $ 2,312 $ 14,553 $ 11,564 $ 2,989 (1) Excludes fully amortized intangible assets. (2) At December 31, 2017 and 2016 , none of the intangible assets were impaired. (3) Includes $1.6 billion at both December 31, 2017 and 2016 of intangible assets associated with trade names that have an indefinite life and, accordingly, are not amortized. (4) Includes $67 million at December 31, 2016 of intangible assets assigned to the non-U.S. consumer credit card business, which was included in assets of business held for sale on the Consolidated Balance Sheet at December 31, 2016. Amortization of intangibles expense was $621 million , $730 million and $834 million for 2017 , 2016 and 2015 . The Corporation estimates aggregate amortization expense will be $538 million , $105 million and $53 million for the years through 2020 and none for the years thereafter.

Deposits

Deposits	12 Months Ended
	Dec. 31, 2017
Deposits [Abstract]
Deposits	Deposits The table below presents information about the Corporation’s time deposits of $100 thousand or more at December 31, 2017 and 2016 . The Corporation also had aggregate time deposits of $17.0 billion and $18.3 billion in denominations that met or exceeded the Federal Deposit Insurance Corporation (FDIC) insurance limit at December 31, 2017 and 2016 . Time Deposits of $100 Thousand or More December 31, 2017 December 31 (Dollars in millions) Three Months or Less Over Three Twelve Months Thereafter Total Total U.S. certificates of deposit and other time deposits $ 12,505 $ 10,660 $ 2,027 $ 25,192 $ 32,898 Non-U.S. certificates of deposit and other time deposits 10,561 3,652 1,259 15,472 14,677 The scheduled contractual maturities for total time deposits at December 31, 2017 are presented in the table below. Contractual Maturities of Total Time Deposits (Dollars in millions) U.S. Non-U.S. Total Due in 2018 $ 46,774 $ 14,264 $ 61,038 Due in 2019 2,623 657 3,280 Due in 2020 1,661 49 1,710 Due in 2021 514 15 529 Due in 2022 452 562 1,014 Thereafter 264 9 273 Total time deposits $ 52,288 $ 15,556 $ 67,844

Federal Funds Sold or Purchased

Federal Funds Sold or Purchased, Securities Financing Agreements and Short-term Borrowings	12 Months Ended
	Dec. 31, 2017
Federal Funds Sold, Securities Borrowed or Purchased Under Agreements to Resell and Short-term Borrowings [Abstract]
Federal Funds Sold or Purchased, Securities Financing Agreements and Short-term Borrowings	Federal Funds Sold or Purchased, Securities Financing Agreements and Short-term Borrowings The table below presents federal funds sold or purchased, securities financing agreements, which include securities borrowed or purchased under agreements to resell and securities loaned or sold under agreements to repurchase, and short-term borrowings. The Corporation elects to account for certain securities financing agreements and short-term borrowings under the fair value option. For more information on the election of the fair value option, see Note 21 – Fair Value Option . Amount Rate Amount Rate (Dollars in millions) 2017 2016 Federal funds sold and securities borrowed or purchased under agreements to resell Average during year $ 222,818 1.07 % $ 216,161 0.52 % Maximum month-end balance during year 237,064 n/a 225,015 n/a Federal funds purchased and securities loaned or sold under agreements to repurchase Average during year $ 199,501 1.30 % $ 183,818 0.97 % Maximum month-end balance during year 218,017 n/a 196,631 n/a Short-term borrowings Average during year 37,337 2.48 % 29,440 1.95 % Maximum month-end balance during year 46,202 n/a 33,051 n/a n/a = not applicable Bank of America, N.A. maintains a global program to offer up to a maximum of $75 billion outstanding at any one time, of bank notes with fixed or floating rates and maturities of at least seven days from the date of issue. Short-term bank notes outstanding under this program totaled $14.2 billion and $9.3 billion at December 31, 2017 and 2016 . These short-term bank notes, along with FHLB advances, U.S. Treasury tax and loan notes, and term federal funds purchased, are included in short-term borrowings on the Consolidated Balance Sheet. Offsetting of Securities Financing Agreements The Corporation enters into securities financing agreements to accommodate customers (also referred to as “matched-book transactions”), obtain securities to cover short positions, and to finance inventory positions. Substantially all of the Corporation’s securities financing activities are transacted under legally enforceable master repurchase agreements or legally enforceable master securities lending agreements that give the Corporation, in the event of default by the counterparty, the right to liquidate securities held and to offset receivables and payables with the same counterparty. The Securities Financing Agreements table presents securities financing agreements included on the Consolidated Balance Sheet in federal funds sold and securities borrowed or purchased under agreements to resell, and in federal funds purchased and securities loaned or sold under agreements to repurchase at December 31, 2017 and 2016 . Balances are presented on a gross basis, prior to the application of counterparty netting. Gross assets and liabilities are adjusted on an aggregate basis to take into consideration the effects of legally enforceable master netting agreements. For more information on the offsetting of derivatives, see Note 2 – Derivatives . Securities Financing Agreements Gross Assets/Liabilities (1) Amounts Offset Net Balance Sheet Amount Financial Instruments (2) Net Assets/Liabilities (Dollars in millions) December 31, 2017 Securities borrowed or purchased under agreements to resell (3) $ 348,472 $ (135,725 ) $ 212,747 $ (165,720 ) $ 47,027 Securities loaned or sold under agreements to repurchase $ 312,582 $ (135,725 ) $ 176,857 $ (146,205 ) $ 30,652 Other (4) 22,711 — 22,711 (22,711 ) — Total $ 335,293 $ (135,725 ) $ 199,568 $ (168,916 ) $ 30,652 December 31, 2016 Securities borrowed or purchased under agreements to resell (3) $ 326,970 $ (128,746 ) $ 198,224 $ (154,974 ) $ 43,250 Securities loaned or sold under agreements to repurchase $ 299,028 $ (128,746 ) $ 170,282 $ (140,774 ) $ 29,508 Other (4) 14,448 — 14,448 (14,448 ) — Total $ 313,476 $ (128,746 ) $ 184,730 $ (155,222 ) $ 29,508 (1) Includes activity where uncertainty exists as to the enforceability of certain master netting agreements under bankruptcy laws in some countries or industries. (2) Includes securities collateral received or pledged under repurchase or securities lending agreements where there is a legally enforceable master netting agreement. These amounts are not offset on the Consolidated Balance Sheet, but are shown as a reduction to derive a net asset or liability. Securities collateral received or pledged where the legal enforceability of the master netting agreements is uncertain is excluded from the table. (3) Excludes repurchase activity of $10.2 billion and $10.1 billion reported in loans and leases on the Consolidated Balance Sheet at December 31, 2017 and 2016 . (4) Balance is reported in accrued expenses and other liabilities on the Consolidated Balance Sheet and relates to transactions where the Corporation acts as the lender in a securities lending agreement and receives securities that can be pledged as collateral or sold. In these transactions, the Corporation recognizes an asset at fair value, representing the securities received, and a liability, representing the obligation to return those securities. Repurchase Agreements and Securities Loaned Transactions Accounted for as Secured Borrowings The following tables present securities sold under agreements to repurchase and securities loaned by remaining contractual term to maturity and class of collateral pledged. Included in “Other” are transactions where the Corporation acts as the lender in a securities lending agreement and receives securities that can be pledged as collateral or sold. Certain agreements contain a right to substitute collateral and/or terminate the agreement prior to maturity at the option of the Corporation or the counterparty. Such agreements are included in the table below based on the remaining contractual term to maturity. Remaining Contractual Maturity Overnight and Continuous 30 Days or Less After 30 Days Through 90 Days Greater than 90 Days (1) Total (Dollars in millions) December 31, 2017 Securities sold under agreements to repurchase $ 125,956 $ 79,913 $ 46,091 $ 38,935 $ 290,895 Securities loaned 9,853 5,658 2,043 4,133 21,687 Other 22,711 — — — 22,711 Total $ 158,520 $ 85,571 $ 48,134 $ 43,068 $ 335,293 December 31, 2016 Securities sold under agreements to repurchase $ 129,853 $ 77,780 $ 31,851 $ 40,752 $ 280,236 Securities loaned 8,564 6,602 1,473 2,153 18,792 Other 14,448 — — — 14,448 Total $ 152,865 $ 84,382 $ 33,324 $ 42,905 $ 313,476 (1) No agreements have maturities greater than three years . Class of Collateral Pledged Securities Sold Under Agreements to Repurchase Securities Loaned Other Total (Dollars in millions) December 31, 2017 U.S. government and agency securities $ 158,299 $ — $ 409 $ 158,708 Corporate securities, trading loans and other 12,787 2,669 624 16,080 Equity securities 23,975 13,523 21,628 59,126 Non-U.S. sovereign debt 90,857 5,495 50 96,402 Mortgage trading loans and ABS 4,977 — — 4,977 Total $ 290,895 $ 21,687 $ 22,711 $ 335,293 December 31, 2016 U.S. government and agency securities $ 153,184 $ — $ 70 $ 153,254 Corporate securities, trading loans and other 11,086 1,630 127 12,843 Equity securities 24,007 11,175 14,196 49,378 Non-U.S. sovereign debt 84,171 5,987 55 90,213 Mortgage trading loans and ABS 7,788 — — 7,788 Total $ 280,236 $ 18,792 $ 14,448 $ 313,476 The Corporation is required to post collateral with a market value equal to or in excess of the principal amount borrowed under repurchase agreements. For securities loaned transactions, the Corporation receives collateral in the form of cash, letters of credit or other securities. To determine whether the market value of the underlying collateral remains sufficient, collateral is generally valued daily, and the Corporation may be required to deposit additional collateral or may receive or return collateral pledged when appropriate. Repurchase agreements and securities loaned transactions are generally either overnight, continuous (i.e., no stated term) or short-term. The Corporation manages liquidity risks related to these agreements by sourcing funding from a diverse group of counterparties, providing a range of securities collateral and pursuing longer durations, when appropriate.

Long-term Debt

Long-term Debt	12 Months Ended
	Dec. 31, 2017
Debt Disclosure [Abstract]
Long-term Debt	Long-term Debt Long-term debt consists of borrowings having an original maturity of one year or more. The table below presents the balance of long-term debt at December 31, 2017 and 2016 , and the related contractual rates and maturity dates as of December 31, 2017 . December 31 (Dollars in millions) 2017 2016 Notes issued by Bank of America Corporation Senior notes: Fixed, with a weighted-average rate of 3.64%, ranging from 0.39% to 8.40%, due 2018 to 2048 $ 119,548 $ 108,933 Floating, with a weighted-average rate of 1.54%, ranging from 0.04% to 6.13%, due 2018 to 2044 21,048 13,164 Senior structured notes 15,460 17,049 Subordinated notes: Fixed, with a weighted-average rate of 4.90%, ranging from 2.94% to 8.57%, due 2018 to 2045 22,004 26,047 Floating, with a weighted-average rate of 1.00%, ranging from 0.20% to 2.56%, due 2018 to 2026 4,058 4,350 Junior subordinated notes (related to trust preferred securities): Fixed, with a weighted-average rate of 6.91%, ranging from 5.25% to 8.05%, due 2027 to 2067 3,282 3,280 Floating, with a weighted-average rate of 2.13%, ranging from 1.91% to 2.60%, due 2027 to 2056 553 552 Total notes issued by Bank of America Corporation 185,953 173,375 Notes issued by Bank of America, N.A. Senior notes: Fixed, with a weighted-average rate of 1.78%, ranging from 0.02% to 2.05%, due in 2018 4,686 5,936 Floating, with a weighted-average rate of 2.60%, ranging from 1.44% to 2.80%, due 2018 to 2041 1,033 3,383 Subordinated notes: Fixed, with a rate of 6.00%, due in 2036 1,679 4,424 Floating, with a rate of 1.33%, due in 2019 1 598 Advances from Federal Home Loan Banks: Fixed, with a weighted-average rate of 5.22%, ranging from 0.01% to 7.72%, due 2018 to 2034 146 162 Floating, with a weighted-average rate of 1.42%, ranging from 1.35% to 1.60%, due 2018 to 2019 5,000 — Securitizations and other BANA VIEs (1) 8,641 9,164 Other 432 3,084 Total notes issued by Bank of America, N.A. 21,618 26,751 Other debt Structured liabilities 18,574 15,171 Nonbank VIEs (1) 1,232 1,482 Other 25 44 Total other debt 19,831 16,697 Total long-term debt $ 227,402 $ 216,823 (1) Represents the total long-term debt included in the liabilities of consolidated VIEs on the Consolidated Balance Sheet. Bank of America Corporation and Bank of America, N.A. maintain various U.S. and non-U.S. debt programs to offer both senior and subordinated notes. The notes may be denominated in U.S. dollars or foreign currencies. At December 31, 2017 and 2016 , the amount of foreign currency-denominated debt translated into U.S. dollars included in total long-term debt was $51.8 billion and $44.7 billion . Foreign currency contracts may be used to convert certain foreign currency-denominated debt into U.S. dollars. At December 31, 2017 , long-term debt of consolidated VIEs in the table above included debt from credit card, home equity and all other VIEs of $8.6 billion , $76 million and $1.2 billion , respectively. Long-term debt of VIEs is collateralized by the assets of the VIEs. For more information, see Note 6 – Securitizations and Other Variable Interest Entities . The weighted-average effective interest rates for total long-term debt (excluding senior structured notes), total fixed-rate debt and total floating-rate debt were 3.44 percent , 3.87 percent and 1.49 percent , respectively, at December 31, 2017 , and 3.80 percent , 4.36 percent and 1.52 percent , respectively, at December 31, 2016 . The Corporation’s ALM activities maintain an overall interest rate risk management strategy that incorporates the use of interest rate contracts to manage fluctuations in earnings that are caused by interest rate volatility. The Corporation’s goal is to manage interest rate sensitivity so that movements in interest rates do not significantly adversely affect earnings and capital. The weighted-average rates are the contractual interest rates on the debt and do not reflect the impacts of derivative transactions. Certain senior structured notes and structured liabilities are accounted for under the fair value option. For more information on these notes, see Note 21 – Fair Value Option . Debt outstanding of $2.7 billion at December 31, 2017 was issued by a 100 percent owned finance subsidiary of the parent company and is unconditionally guaranteed by the parent company. The following table shows the carrying value for aggregate annual contractual maturities of long-term debt as of December 31, 2017 . Included in the table are certain structured notes issued by the Corporation that contain provisions whereby the borrowings are redeemable at the option of the holder (put options) at specified dates prior to maturity. Other structured notes have coupon or repayment terms linked to the performance of debt or equity securities, indices, currencies or commodities, and the maturity may be accelerated based on the value of a referenced index or security. In both cases, the Corporation or a subsidiary may be required to settle the obligation for cash or other securities prior to the contractual maturity date. These borrowings are reflected in the table as maturing at their contractual maturity date. During 2017 , the Corporation had total long-term debt maturities and redemptions in the aggregate of $48.8 billion consisting of $29.1 billion for Bank of America Corporation, $13.3 billion for Bank of America, N.A. and $6.4 billion of other debt. During 2016 , the Corporation had total long-term debt maturities and redemptions in the aggregate of $51.6 billion consisting of $30.6 billion for Bank of America Corporation, $11.6 billion for Bank of America, N.A. and $9.4 billion of other debt. In December 2017, pursuant to a private offering, the Corporation exchanged $11.0 billion of outstanding long-term debt for new fixed/floating-rate senior notes, subject to certain terms and conditions. Based on the attributes of the exchange transactions, the newly issued securities are not considered substantially different , for accounting purposes, from the exchanged securities. Therefore, there was no impact to the Corporation’s results of operations as any amounts paid to debt holders were capitalized, and the premiums or discounts on the outstanding long-term debt were carried over to the new securities and will be amortized over their contractual lives using a revised effective interest rate. Long-term Debt by Maturity (Dollars in millions) 2018 2019 2020 2021 2022 Thereafter Total Bank of America Corporation Senior notes $ 19,577 $ 15,115 $ 10,580 $ 16,196 $ 9,691 $ 69,437 $ 140,596 Senior structured notes 2,749 1,486 950 437 2,017 7,821 15,460 Subordinated notes 2,973 1,552 — 375 476 20,686 26,062 Junior subordinated notes — — — — — 3,835 3,835 Total Bank of America Corporation 25,299 18,153 11,530 17,008 12,184 101,779 185,953 Bank of America, N.A. Senior notes 5,699 — — — — 20 5,719 Subordinated notes — 1 — — — 1,679 1,680 Advances from Federal Home Loan Banks 3,009 2,013 11 2 3 108 5,146 Securitizations and other Bank VIEs (1) 2,300 3,200 3,098 — — 43 8,641 Other 51 194 15 — 9 163 432 Total Bank of America, N.A. 11,059 5,408 3,124 2 12 2,013 21,618 Other debt Structured liabilities 5,677 2,340 1,545 870 803 7,339 18,574 Nonbank VIEs (1) 22 45 — — — 1,165 1,232 Other — — — — — 25 25 Total other debt 5,699 2,385 1,545 870 803 8,529 19,831 Total long-term debt $ 42,057 $ 25,946 $ 16,199 $ 17,880 $ 12,999 $ 112,321 $ 227,402 (1) Represents the total long-term debt included in the liabilities of consolidated VIEs on the Consolidated Balance Sheet. Trust Preferred and Hybrid Securities Trust preferred securities (Trust Securities) are primarily issued by trust companies (the Trusts) that are not consolidated. These Trust Securities are mandatorily redeemable preferred security obligations of the Trusts. The sole assets of the Trusts generally are junior subordinated deferrable interest notes of the Corporation or its subsidiaries (the Notes). The Trusts generally are 100 percent-owned finance subsidiaries of the Corporation. Obligations associated with the Notes are included in the long-term debt table on page 150 . Certain of the Trust Securities were issued at a discount and may be redeemed prior to maturity at the option of the Corporation. The Trusts generally have invested the proceeds of such Trust Securities in the Notes. Each issue of the Notes has an interest rate equal to the corresponding Trust Securities distribution rate. The Corporation has the right to defer payment of interest on the Notes at any time or from time to time for a period not exceeding five years provided that no extension period may extend beyond the stated maturity of the relevant Notes. During any such extension period, distributions on the Trust Securities will also be deferred, and the Corporation’s ability to pay dividends on its common and preferred stock will be restricted. The Trust Securities generally are subject to mandatory redemption upon repayment of the related Notes at their stated maturity dates or their earlier redemption at a redemption price equal to their liquidation amount plus accrued distributions to the date fixed for redemption and the premium, if any, paid by the Corporation upon concurrent repayment of the related Notes. Periodic cash payments and payments upon liquidation or redemption with respect to Trust Securities are guaranteed by the Corporation or its subsidiaries to the extent of funds held by the Trusts (the Preferred Securities Guarantee). The Preferred Securities Guarantee, when taken together with the Corporation’s other obligations including its obligations under the Notes, generally will constitute a full and unconditional guarantee, on a subordinated basis, by the Corporation of payments due on the Trust Securities. The Trust Securities Summary table details the outstanding Trust Securities and the related Notes previously issued which remained outstanding at December 31, 2017 . Trust Securities Summary (Dollars in millions) Issuer Issuance Date Aggregate Principal Amount of Trust Securities Aggregate Principal Amount of the Notes Stated Maturity of the Trust Securities Per Annum Interest Rate of the Notes Interest Payment Dates Redemption Period December 31, 2017 Bank of America Capital Trust VI March 2005 $ 27 $ 27 March 2035 5.63 % Semi-Annual Any time Capital Trust VII (1) August 2005 6 6 August 2035 5.25 Semi-Annual Any time Capital Trust XI May 2006 658 678 May 2036 6.63 Semi-Annual Any time Capital Trust XV May 2007 1 1 June 2056 3-mo. LIBOR + 80 bps Quarterly On or after 6/01/37 NationsBank Capital Trust III February 1997 131 135 January 2027 3-mo. LIBOR + 55 bps Quarterly On or after 1/15/07 BankAmerica Capital III January 1997 103 105 January 2027 3-mo. LIBOR + 57 bps Quarterly On or after 1/15/02 Fleet Capital Trust V December 1998 79 82 December 2028 3-mo. LIBOR + 100 bps Quarterly On or after 12/18/03 BankBoston Capital Trust III June 1997 53 55 June 2027 3-mo. LIBOR + 75 bps Quarterly On or after 6/15/07 Capital Trust IV June 1998 102 106 June 2028 3-mo. LIBOR + 60 bps Quarterly On or after 6/08/03 MBNA Capital Trust B January 1997 70 73 February 2027 3-mo. LIBOR + 80 bps Quarterly On or after 2/01/07 Countrywide Capital III June 1997 200 206 June 2027 8.05 Semi-Annual Only under special event Capital V November 2006 1,495 1,496 November 2036 7.00 Quarterly On or after 11/01/11 Merrill Lynch Capital Trust I December 2006 1,050 1,051 December 2066 6.45 Quarterly On or after 12/11 Capital Trust III August 2007 750 751 September 2067 7.375 Quarterly On or after 9/12 Total $ 4,725 $ 4,772 (1) Notes are denominated in British pound. Presentation currency is U.S. dollar.

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2017
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies In the normal course of business, the Corporation enters into a number of off-balance sheet commitments. These commitments expose the Corporation to varying degrees of credit and market risk and are subject to the same credit and market risk limitation reviews as those instruments recorded on the Consolidated Balance Sheet. Credit Extension Commitments The Corporation enters into commitments to extend credit such as loan commitments, SBLCs and commercial letters of credit to meet the financing needs of its customers. The following table includes the notional amount of unfunded legally binding lending commitments net of amounts distributed (e.g., syndicated or participated) to other financial institutions. The distributed amounts were $11.0 billion and $12.1 billion at December 31, 2017 and 2016 . At December 31, 2017 , the carrying value of these commitments, excluding commitments accounted for under the fair value option, was $793 million , including deferred revenue of $16 million and a reserve for unfunded lending commitments of $777 million . At December 31, 2016 , the comparable amounts were $779 million , $17 million and $762 million , respectively. The carrying value of these commitments is classified in accrued expenses and other liabilities on the Consolidated Balance Sheet. The following table also includes the notional amount of commitments of $4.8 billion and $7.0 billion at December 31, 2017 and 2016 that are accounted for under the fair value option. However, the following table excludes cumulative net fair value of $120 million and $173 million on these commitments, which is classified in accrued expenses and other liabilities. For more information regarding the Corporation’s loan commitments accounted for under the fair value option, see Note 21 – Fair Value Option . Credit Extension Commitments Expire in One Expire After One Expire After Three Years Through Five Years Expire After Five Total (Dollars in millions) December 31, 2017 Notional amount of credit extension commitments Loan commitments $ 85,804 $ 140,942 $ 147,043 $ 21,342 $ 395,131 Home equity lines of credit 6,172 4,457 2,288 31,250 44,167 Standby letters of credit and financial guarantees (1) 19,976 11,261 3,420 1,144 35,801 Letters of credit 1,291 117 129 87 1,624 Legally binding commitments 113,243 156,777 152,880 53,823 476,723 Credit card lines (2) 362,030 — — — 362,030 Total credit extension commitments $ 475,273 $ 156,777 $ 152,880 $ 53,823 $ 838,753 December 31, 2016 Notional amount of credit extension commitments Loan commitments $ 82,609 $ 133,063 $ 152,854 $ 22,129 $ 390,655 Home equity lines of credit 8,806 10,701 2,644 25,050 47,201 Standby letters of credit and financial guarantees (1) 19,165 10,754 3,225 1,027 34,171 Letters of credit 1,285 103 114 53 1,555 Legally binding commitments 111,865 154,621 158,837 48,259 473,582 Credit card lines (2) 377,773 — — — 377,773 Total credit extension commitments $ 489,638 $ 154,621 $ 158,837 $ 48,259 $ 851,355 (1) The notional amounts of SBLCs and financial guarantees classified as investment grade and non-investment grade based on the credit quality of the underlying reference name within the instrument were $27.3 billion and $8.1 billion at December 31, 2017 , and $25.5 billion and $8.3 billion at December 31, 2016 . Amounts in the table include consumer SBLCs of $421 million and $376 million at December 31, 2017 and 2016 . (2) Includes business card unused lines of credit. Legally binding commitments to extend credit generally have specified rates and maturities. Certain of these commitments have adverse change clauses that help to protect the Corporation against deterioration in the borrower’s ability to pay. Other Commitments At December 31, 2017 and 2016 , the Corporation had commitments to purchase loans (e.g., residential mortgage and commercial real estate) of $344 million and $767 million , and commitments to purchase commercial loans of $994 million and $636 million , which upon settlement will be included in loans or LHFS. At December 31, 2017 and 2016 , the Corporation had commitments to purchase commodities, primarily liquefied natural gas, of $1.5 billion and $1.9 billion , which upon settlement will be included in trading account assets. At December 31, 2017 and 2016 , the Corporation had commitments to enter into resale and forward-dated resale and securities borrowing agreements of $56.8 billion and $48.9 billion , and commitments to enter into forward-dated repurchase and securities lending agreements of $34.3 billion and $24.4 billion . These commitments expire primarily within the next 12 months. The Corporation has entered into agreements to purchase retail automobile loans from certain auto loan originators. These agreements provide for stated purchase amounts and contain cancellation provisions that allow the Corporation to terminate its commitment to purchase at any time, with a minimum notification period. At December 31, 2017 and 2016 , the Corporation’s maximum purchase commitment was $345 million and $475 million . In addition, the Corporation has a commitment to originate or purchase auto loans and leases up to $3.0 billion from a strategic partner during 2018 . This commitment extends through November 2022 and can be terminated with 12 months prior notice. The Corporation is a party to operating leases for certain of its premises and equipment. Commitments under these leases are approximately $2.3 billion , $2.1 billion , $1.9 billion , $1.7 billion and $1.4 billion for 2018 through 2022 , respectively, and $5.1 billion in the aggregate for all years thereafter. Other Guarantees Bank-owned Life Insurance Book Value Protection The Corporation sells products that offer book value protection to insurance carriers who offer group life insurance policies to corporations, primarily banks. At December 31, 2017 and 2016 , the notional amount of these guarantees, which is recorded as derivatives totaled $10.4 billion and $13.9 billion . At December 31, 2017 and 2016 , the Corporation’s maximum exposure related to these guarantees totaled $1.6 billion and $3.2 billion , with estimated maturity dates between 2033 and 2039. The net fair value including the fee receivable associated with these guarantees was $3 million and $4 million at December 31, 2017 and 2016 , and reflects the probability of surrender as well as the multiple structural protection features in the contracts. Indemnifications In the ordinary course of business, the Corporation enters into various agreements that contain indemnifications, such as tax indemnifications, whereupon payment may become due if certain external events occur, such as a change in tax law. The indemnification clauses are often standard contractual terms and were entered into in the normal course of business based on an assessment that the risk of loss would be remote. These agreements typically contain an early termination clause that permits the Corporation to exit the agreement upon these events. The maximum potential future payment under indemnification agreements is difficult to assess for several reasons, including the occurrence of an external event, the inability to predict future changes in tax and other laws, the difficulty in determining how such laws would apply to parties in contracts, the absence of exposure limits contained in standard contract language and the timing of any early termination clauses. Historically, any payments made under these guarantees have been de minimis. The Corporation has assessed the probability of making such payments in the future as remote. Merchant Services In accordance with credit and debit card association rules, the Corporation sponsors merchant processing servicers that process credit and debit card transactions on behalf of various merchants. In connection with these services, a liability may arise in the event of a billing dispute between the merchant and a cardholder that is ultimately resolved in the cardholder’s favor. If the merchant defaults on its obligation to reimburse the cardholder, the cardholder, through its issuing bank, generally has until six months after the date of the transaction to present a chargeback to the merchant processor, which is primarily liable for any losses on covered transactions. However, if the merchant processor fails to meet its obligation to reimburse the cardholder for disputed transactions, then the Corporation, as the sponsor, could be held liable for the disputed amount. In 2017 and 2016 , the sponsored entities processed and settled $812.2 billion and $731.4 billion of transactions and recorded losses of $28 million and $33 million . A significant portion of this activity was processed by a joint venture in which the Corporation holds a 49 percent ownership, which is recorded in other assets on the Consolidated Balance Sheet and in All Other . At both December 31, 2017 and 2016 , the carrying value of the Corporation’s investment in the merchant services joint venture was $2.9 billion . As of December 31, 2017 and 2016 , the maximum potential exposure for sponsored transactions totaled $346.4 billion and $325.7 billion . However, the Corporation believes that the maximum potential exposure is not representative of the actual potential loss exposure and does not expect to make material payments in connection with these guarantees. Exchange and Clearing House Member Guarantees The Corporation is a member of various securities and derivative exchanges and clearinghouses, both in the U.S. and other countries. As a member, the Corporation may be required to pay a pro-rata share of the losses incurred by some of these organizations as a result of another member default and under other loss scenarios. The Corporation’s potential obligations may be limited to its membership interests in such exchanges and clearinghouses, to the amount (or multiple) of the Corporation’s contribution to the guarantee fund or, in limited instances, to the full pro-rata share of the residual losses after applying the guarantee fund. The Corporation’s maximum potential exposure under these membership agreements is difficult to estimate; however, the potential for the Corporation to be required to make these payments is remote. Prime Brokerage and Securities Clearing Services In connection with its prime brokerage and clearing businesses, the Corporation performs securities clearance and settlement services with other brokerage firms and clearinghouses on behalf of its clients. Under these arrangements, the Corporation stands ready to meet the obligations of its clients with respect to securities transactions. The Corporation’s obligations in this respect are secured by the assets in the clients’ accounts and the accounts of their customers as well as by any proceeds received from the transactions cleared and settled by the firm on behalf of clients or their customers. The Corporation’s maximum potential exposure under these arrangements is difficult to estimate; however, the potential for the Corporation to incur material losses pursuant to these arrangements is remote. Other Guarantees The Corporation has entered into additional guarantee agreements and commitments, including sold risk participation swaps, liquidity facilities, lease-end obligation agreements, partial credit guarantees on certain leases, real estate joint venture guarantees, divested business commitments and sold put options that require gross settlement. The maximum potential future payment under these agreements was approximately $5.9 billion and $6.7 billion at December 31, 2017 and 2016 . The estimated maturity dates of these obligations extend up to 2040. The Corporation has made no material payments under these guarantees. In the normal course of business, the Corporation periodically guarantees the obligations of its affiliates in a variety of transactions including ISDA-related transactions and non-ISDA related transactions such as commodities trading, repurchase agreements, prime brokerage agreements and other transactions. Payment Protection Insurance Claims Matter On June 1, 2017, the Corporation sold its non-U.S. consumer credit card business. Included in the calculation of the gain on sale, the Corporation recorded an obligation to indemnify the purchaser for substantially all PPI exposure above reserves assumed by the purchaser. Litigation and Regulatory Matters In the ordinary course of business, the Corporation and its subsidiaries are routinely defendants in or parties to many pending and threatened legal, regulatory and governmental actions and proceedings. In view of the inherent difficulty of predicting the outcome of such matters, particularly where the claimants seek very large or indeterminate damages or where the matters present novel legal theories or involve a large number of parties, the Corporation generally cannot predict what the eventual outcome of the pending matters will be, what the timing of the ultimate resolution of these matters will be, or what the eventual loss, fines or penalties related to each pending matter may be. In accordance with applicable accounting guidance, the Corporation establishes an accrued liability when those matters present loss contingencies that are both probable and estimable. In such cases, there may be an exposure to loss in excess of any amounts accrued. As a matter develops, the Corporation, in conjunction with any outside counsel handling the matter, evaluates on an ongoing basis whether such matter presents a loss contingency that is probable and estimable. Once the loss contingency is deemed to be both probable and estimable, the Corporation will establish an accrued liability and record a corresponding amount of litigation-related expense. The Corporation continues to monitor the matter for further developments that could affect the amount of the accrued liability that has been previously established. Excluding expenses of internal and external legal service providers, litigation-related expense of $753 million was recognized for 2017 compared to $1.2 billion for 2016 . For a limited number of the matters disclosed in this Note, for which a loss, whether in excess of a related accrued liability or where there is no accrued liability, is reasonably possible in future periods, the Corporation is able to estimate a range of possible loss. In determining whether it is possible to estimate a range of possible loss, the Corporation reviews and evaluates its matters on an ongoing basis, in conjunction with any outside counsel handling the matter, in light of potentially relevant factual and legal developments. In cases in which the Corporation possesses sufficient appropriate information to estimate a range of possible loss, that estimate is aggregated and disclosed below. There may be other disclosed matters for which a loss is probable or reasonably possible but such an estimate of the range of possible loss may not be possible. For those matters where an estimate of the range of possible loss is possible, management currently estimates the aggregate range of possible loss is $0 to $1.3 billion in excess of the accrued liability (if any) related to those matters. This estimated range of possible loss is based upon currently available information and is subject to significant judgment and a variety of assumptions, and known and unknown uncertainties. The matters underlying the estimated range will change from time to time, and actual results may vary significantly from the current estimate. Therefore, this estimated range of possible loss represents what the Corporation believes to be an estimate of possible loss only for certain matters meeting these criteria. It does not represent the Corporation’s maximum loss exposure. Information is provided below regarding the nature of all of these contingencies and, where specified, the amount of the claim associated with these loss contingencies. Based on current knowledge, management does not believe that loss contingencies arising from pending matters, including the matters described herein will have a material adverse effect on the consolidated financial position or liquidity of the Corporation. However, in light of the inherent uncertainties involved in these matters, some of which are beyond the Corporation’s control, and the very large or indeterminate damages sought in some of these matters, an adverse outcome in one or more of these matters could be material to the Corporation’s results of operations or liquidity for any particular reporting period. Ambac Bond Insurance Litigation Ambac Assurance Corporation and the Segregated Account of Ambac Assurance Corporation (together, Ambac) have filed five separate lawsuits against the Corporation and its subsidiaries relating to bond insurance policies Ambac provided on certain securitized pools of HELOCs, first-lien subprime home equity loans, fixed-rate second-lien mortgage loans and negative amortization pay option adjustable-rate mortgage loans. Ambac alleges that they have paid or will pay claims as a result of defaults in the underlying loans and assert that the defendants misrepresented the characteristics of the underlying loans and/or breached certain contractual representations and warranties regarding the underwriting and servicing of the loans. In those actions where the Corporation is named as a defendant, Ambac contends the Corporation is liable on various successor and vicarious liability theories. Ambac v. Countrywide I The Corporation, Countrywide and other Countrywide entities are named as defendants in an action filed on September 29, 2010 in New York Supreme Court. Ambac asserts claims for fraudulent inducement as well as breach of contract and seeks damages in excess of $2.2 billion , plus unspecified punitive damages. On May 16, 2017, the First Department issued its decision on the parties’ cross-appeals of the trial court’s October 22, 2015 summary judgment rulings. Among other things, the First Department reversed on the applicability of New York insurance law to Ambac’s common-law fraud claim, ruling that Ambac must prove all of the elements of its fraudulent inducement claim, including justifiable reliance and loss causation; reversed as to Ambac’s remedy for its breach of contract claims, finding that Ambac’s sole remedy is the repurchase protocol of cure, repurchases or substitution of any materially defective loan; affirmed the trial court’s ruling that Ambac’s compensatory damages claim was an impermissible request for rescissory damages; reversed the dismissal of Ambac’s claim for reimbursement of claims payments, but affirmed the dismissal of Ambac’s claim for reimbursements of attorneys’ fees; and reversed as to the meaning of specific representations and warranties, ruling that disputed issues of fact precluded summary judgment. On July 25, 2017, the First Department granted Ambac’s motion for leave to appeal to the Court of Appeals. That appeal is pending. Ambac v. Countrywide II On December 30, 2014, Ambac filed a complaint in New York Supreme Court against the same defendants, claiming fraudulent inducement against Countrywide, and successor and vicarious liability against the Corporation. Ambac claims damages in excess of $600 million plus punitive damages. On December 19, 2016, the Court granted in part and denied in part Countrywide’s motion to dismiss the complaint. Ambac v. Countrywide III On December 30, 2014, Ambac filed an action in Wisconsin state court against Countrywide. The complaint seeks damages in excess of $350 million plus punitive damages. Countrywide has challenged the Wisconsin courts’ jurisdiction over it. Following a ruling by the lower court that jurisdiction did not exist, the Wisconsin Court of Appeals reversed. On June 30, 2017, the Wisconsin Supreme Court reversed the decision of the Wisconsin Court of Appeals and held that Countrywide did not consent to the jurisdiction of the Wisconsin courts and remanded the case to the Court of Appeals for further consideration of whether specific jurisdiction exists. On December 14, 2017, the Wisconsin Court of Appeals ruled that specific jurisdiction over Countrywide does not exist for this matter. On January 16, 2018, Ambac asked the Wisconsin Supreme Court to review the decision of the Court of Appeals. Ambac v. Countrywide IV On July 21, 2015, Ambac filed an action in New York Supreme Court against Countrywide asserting the same claims for fraudulent inducement that Ambac asserted in Ambac v. Countrywide III . Ambac simultaneously moved to stay the action pending resolution of its appeal in Ambac v. Countrywide III . Countrywide moved to dismiss the complaint. On September 20, 2016, the Court granted Ambac’s motion to stay the action pending resolution of Ambac v. Countrywide III . Ambac v. First Franklin On April 16, 2012, Ambac filed an action against BANA, First Franklin and various Merrill Lynch entities, including Merrill Lynch, Pierce, Fenner & Smith Incorporated (MLPF&S) in New York Supreme Court relating to guaranty insurance Ambac provided on a First Franklin securitization sponsored by Merrill Lynch. The complaint alleges fraudulent inducement and breach of contract, including breach of contract claims against BANA based upon its servicing of the loans in the securitization. The complaint alleges that Ambac has paid hundreds of millions of dollars in claims and has accrued and continues to accrue tens of millions of dollars in additional claims. Ambac seeks as damages the total claims it has paid and its projected future claims payment obligations, as well as specific performance of defendants’ contractual repurchase obligations. ATM Access Fee Litigation On January 10, 2012, a putative consumer class action was filed in U.S. District Court for the District of Columbia against Visa, Inc., MasterCard, Inc. and several financial institutions, including the Corporation and BANA alleging that surcharges paid at financial institution ATMs are artificially inflated by Visa and MasterCard rules and regulations. The network rules are alleged to be the product of a conspiracy between Visa, MasterCard and financial institutions in violation of Section 1 of the Sherman Act. Plaintiffs seek compensatory and treble damages and injunctive relief. On February 13, 2013, the District Court granted defendants’ motion to dismiss. On August 4, 2015, the U.S. Court of Appeals for the District of Columbia Circuit vacated the District Court’s decision and remanded the case to the District Court, where proceedings have resumed. Deposit Insurance Assessment On January 9, 2017, the FDIC filed suit against BANA in U.S. District Court for the District of Columbia alleging failure to pay a December 15, 2016 invoice for additional deposit insurance assessments and interest in the amount of $542 million for the quarters ending June 30, 2013 through December 31, 2014. On April 7, 2017, the FDIC amended its complaint to add a claim for additional deposit insurance and interest in the amount of $583 million for the quarters ending March 31, 2012 through March 31, 2013. The FDIC asserts these claims based on BANA’s alleged underreporting of counterparty exposures that resulted in underpayment of assessments for those quarters. BANA disagrees with the FDIC’s interpretation of the regulations as they existed during the relevant time period and is defending itself against the FDIC’s claims. Pending final resolution, BANA has pledged security satisfactory to the FDIC related to the disputed additional assessment amounts. Interchange and Related Litigation In 2005, a group of merchants filed a series of putative class actions and individual actions directed at interchange fees associated with Visa and MasterCard payment card transactions. These actions, which were consolidated in the U.S. District Court for the Eastern District of New York under the caption In re Payment Card Interchange Fee and Merchant Discount Anti-Trust Litigation (Interchange), named Visa, MasterCard and several banks and bank holding companies, including the Corporation, as defendants. Plaintiffs allege that defendants conspired to fix the level of default interchange rates and that certain rules of Visa and MasterCard were unreasonable restraints of trade. Plaintiffs sought compensatory and treble damages and injunctive relief. On October 19, 2012, defendants reached a proposed settlement that would have provided for, among other things, (i) payments by defendants to the class and individual plaintiffs totaling approximately $6.6 billion , allocated to each defendant based upon various loss-sharing agreements; (ii) distribution to class merchants of an amount equal to 10 basis points (bps) of default interchange across all Visa and MasterCard credit card transactions; and (iii) modifications to certain Visa and MasterCard rules. Although the District Court approved the class settlement agreement, the U.S. Court of Appeals for the Second Circuit reversed the decision on appeal. The Interchange class case was remanded to the District Court, where proceedings have resumed. In addition to the class actions, a number of merchants filed individual actions against the defendants. The Corporation was named as a defendant in one such individual action. In addition, a number of individual actions were filed that do not name the Corporation as a defendant. As a result of various loss-sharing agreements, however, the Corporation remains liable for any settlement or judgment in these individual suits where it is not named as a defendant. LIBOR, Other Reference Rates, Foreign Exchange (FX) and Bond Trading Matters Government authorities in the U.S. and various international jurisdictions continue to conduct investigations, to make inquiries of, and to pursue proceedings against, a significant number of FX market participants, including the Corporation, regarding FX market participants’ conduct and systems and controls. Government authorities also continue to conduct investigations concerning conduct and systems and controls of panel banks in connection with the setting of other reference rates as well as the trading of government, sovereign, supranational and agency bonds. The Corporation is responding to and cooperating with these proceedings and investigations. In addition, the Corporation, BANA and certain Merrill Lynch entities have been named as defendants along with most of the other LIBOR panel banks in a number of individual and putative class actions by persons alleging they sustained losses on U.S. dollar LIBOR-based financial instruments as a result of collusion or manipulation by defendants regarding the setting of U.S. dollar LIBOR. Plaintiffs assert a variety of claims, including antitrust, Commodity Exchange Act (CEA), Racketeer Influenced and Corrupt Organizations (RICO), Securities Exchange Act of 1934 (Exchange Act), common law fraud and breach of contract claims, and seek compensatory, treble and punitive damages, and injunctive relief. All cases naming the Corporation and its affiliates relating to U.S. dollar LIBOR have been consolidated for pre-trial purposes in the U.S. District Court for the Southern District of New York. In a series of rulings beginning in March 2013, the District Court dismissed antitrust, RICO, Exchange Act and certain state law claims, dismissed all manipulation claims based on alleged trader conduct as to the Corporation and BANA, and substantially limited the scope of CEA and various other claims. On May 23, 2016, the U.S. Court of Appeals for the Second Circuit reversed the District Court’s dismissal of the antitrust claims and remanded for further proceedings in the District Court, and on December 20, 2016, the District Court again dismissed certain plaintiffs’ antitrust claims in their entirety and substantially limited the scope of the remaining antitrust claims. Certain antitrust, CEA and state law claims remain pending in the District Court against the Corporation, BANA and certain Merrill Lynch entities, and the Court is continuing to consider motions regarding them. Plaintiffs whose antitrust, Exchange Act and/or state law claims were previously dismissed by the District Court are pursuing appeals in the Second Circuit. In addition, the Corporation, BANA and MLPF&S were named as defendants along with other FX market participants in a putative class action filed in the U.S. District Court for the Southern District of New York, in which plaintiffs allege that they sustained losses as a result of the defendants’ alleged conspiracy to manipulate the prices of over-the-counter FX transactions and FX transactions on an exchange. Plaintiffs assert antitrust claims and claims for violations of the CEA and seek compensatory and treble damages, as well as declaratory and injunctive relief. On October 1, 2015, the Corporation, BANA and MLPF&S executed a final settlement agreement, in which they agreed to pay $187.5 million to settle the litigation. The settlement is subject to final District Court approval. Mortgage-backed Securities Litigation The Corporation and its affiliates, Countrywide entities and their affiliates, and Merrill Lynch entities and their affiliates have been named as defendants in cases relating to their various roles in MBS offerings and, in certain instances, have received claims for contractual indemnification related to the MBS securities actions. Plaintiffs in these cases generally sought unspecified compensatory and/or rescissory damages, unspecified costs and legal fees and generally alleged false and misleading statements. The indemnification claims include claims from underwriters of MBS that were issued by these entities, and from underwriters and issuers of MBS backed by loans originated by these entities. Mortgage Repurchase Litigation U.S. Bank - Harborview Repurchase Litigation On August 29, 2011, U.S. Bank, National Association (U.S. Bank), as trustee for the HarborView Mortgage Loan Trust 2005-10 (the Trust), a mortgage pool backed by loans originated by Countrywide Home Loans, Inc. (CHL), filed a complaint in New York Supreme Court, in a case entitled U.S. Bank National Association, as Trustee for HarborView Mortgage Loan Trust, Series 2005-10 v. Countrywide Home Loans, Inc. (dba Bank of America Home Loans), Bank of America Corporation, Countrywide Financial Corporation, Bank of America, N.A. and NB Holdings Corporation, alleging breaches of representations and warranties. This litigation has been stayed since March 23, 2017, pending finalization of the settlement discussed below. On December 5, 2016, the defendants and certain certificate-holders in the Trust agreed to settle the litigation in an amount not material to the Corporation, subject to acceptance by U.S. Bank. U.S. Bank has initiated a trust instruction proceeding in Minnesota state court relating to the proposed settlement, and that proceeding is ongoing . U.S. Bank - SURF/OWNIT Repurchase Litigation On August 29, 2014 and September 2, 2014, U.S. Bank, solely in its capacity as Trustee for seven securitization trusts (the Trusts), served seven summonses with notice commencing actions against First Franklin Financial Corporation, Merrill Lynch Mortgage Lending, Inc., Merrill Lynch Mortgage Investors, Inc. (MLMI) and Ownit Mortgage Solutions Inc. in New York Supreme Court. The summonses advance breach of contract claims alleging that defendants breached representations and warranties related to loans securitized in the Trusts. The summonses allege that defendants failed to repurchase breaching mortgage loans from the Trusts, and seek specific performance of defendants’ alleged obligation to repurchase breaching loans, declaratory judgment, compensatory, rescissory and other damages, and indemnity. On February 25, 2015 and March 11, 2015, U.S. Bank served complaints regarding four of the seven Trusts. On December 7, 2015, the Court granted in part and denied in part defendants’ motion to dismiss the complaints. The Court dismissed claims for breach of representations and warranties against MLMI, dismissed U.S. Bank’s claims for indemnity and attorneys’ fees, and deferred a ruling regarding defendants’ alleged failure to provide notice of alleged representations and warranties breaches, but upheld the complaints in all other respects. On December 28, 2016, U.S. Bank filed a complaint with respect to a fifth Trust.

Shareholders' Equity

Shareholders' Equity	12 Months Ended
	Dec. 31, 2017
Equity [Abstract]
Shareholders' Equity	Shareholders’ Equity Common Stock Declared Quarterly Cash Dividends on Common Stock (1) Declaration Date Record Date Payment Date Dividend Per Share January 31, 2018 March 2, 2018 March 30, 2018 $ 0.12 October 25, 2017 December 1, 2017 December 29, 2017 0.12 July 26, 2017 September 1, 2017 September 29, 2017 0.12 April 26, 2017 June 2, 2017 June 30, 2017 0.075 January 26, 2017 March 3, 2017 March 31, 2017 0.075 (1) In 2017 and through February 22, 2018 . The following table summarizes common stock repurchases during 2017, 2016 and 2015. Common Stock Repurchase Summary (in millions) 2017 2016 2015 Total share repurchases, including CCAR capital plan repurchases 509 333 140 Purchase price of shares repurchased and retired (1) CCAR capital plan repurchases $ 9,347 $ 4,312 $ 2,374 Other authorized repurchases 3,467 800 — Total shares repurchased $ 12,814 $ 5,112 $ 2,374 (1) Represents reductions to shareholders’ equity due to common stock repurchases. On June 28, 2017, following the Federal Reserve’s non-objection to the Corporation’s 2017 Comprehensive Capital Analysis and Review (CCAR) capital plan, the Board of Directors (Board) authorized the repurchase of $12.0 billion of common stock from July 1, 2017 through June 30, 2018, plus repurchases expected to be approximately $900 million to offset the effect of equity-based compensation plans during the same period. The common stock repurchase authorization includes both common stock and warrants. The Corporation’s 2017 capital plan also included a request to increase the quarterly common stock dividend from $0.075 per share to $0.12 per share. On December 5, 2017, following approval by the Federal Reserve, the Board authorized the repurchase of an additional $5.0 billion of common stock through June 30, 2018. In 2017, the Corporation repurchased $12.8 billion of common stock in connection with the 2017 and 2016 CCAR capital plans and pursuant to other repurchases approved by the Board and the Federal Reserve. Other authorized repurchases included $1.8 billion of common stock pursuant to the Corporation’s plan announced on January 13, 2017 and $1.7 billion under the authorization announced on December 5, 2017. At December 31, 2017 , the Corporation had warrants outstanding and exercisable to purchase 122 million shares of its common stock expiring on October 28, 2018, and warrants outstanding and exercisable to purchase 143 million shares of common stock expiring on January 16, 2019. These warrants were originally issued in connection with preferred stock issuances to the U.S. Department of the Treasury in 2009 and 2008, and are listed on the New York Stock Exchange. The exercise price of the warrants expiring on January 16, 2019 is subject to continued adjustment each time the quarterly cash dividend is in excess of $0.01 per common share to compensate the holders of the warrants for dilution resulting from an increased dividend. The Corporation had cash dividends of $0.12 per share for the third and fourth quarters of 2017, and cash dividends of $0.075 per share for the first and second quarter of 2017, or $0.39 per share for the year, resulting in an adjustment to the exercise price of these warrants in each quarter. As a result of the Corporation’s 2017 dividends of $0.39 per common share, the exercise price of the warrants expiring on January 16, 2019 was adjusted to $12.757 per share. The warrants expiring on October 28, 2018, which have an exercise price of $30.79 per share, also contain this anti-dilution provision except the adjustment is triggered only when the Corporation declares quarterly dividends at a level greater than $0.32 per common share. On August 24, 2017, the holders of the Corporation’s Series T 6% Non-cumulative preferred stock (Series T) exercised warrants to acquire 700 million shares of the Corporation’s common stock. The carrying value of the preferred stock was $2.9 billion and, upon conversion, was recorded as additional paid-in capital. For more information, see Note 15 – Earnings Per Common Share . In connection with employee stock plans, in 2017, the Corporation issued approximately 66 million shares and repurchased approximately 27 million shares of its common stock to satisfy tax withholding obligations. At December 31, 2017 , the Corporation had reserved 869 million unissued shares of common stock for future issuances under employee stock plans, common stock warrants, convertible notes and preferred stock. Preferred Stock The cash dividends declared on preferred stock were $1.6 billion , $1.7 billion and $1.5 billion for 2017 , 2016 and 2015 , respectively. The following table presents a summary of perpetual preferred stock outstanding at December 31, 2017 . All series of preferred stock in the Preferred Stock Summary table have a par value of $0.01 per share, are not subject to the operation of a sinking fund, have no participation rights, and with the exception of the Series L Preferred Stock, are not convertible. The holders of the Series B Preferred Stock and Series 1 through 5 Preferred Stock have general voting rights and vote together with the common stock. The holders of the other series included in the table have no general voting rights. All outstanding series of preferred stock of the Corporation have preference over the Corporation’s common stock with respect to the payment of dividends and distribution of the Corporation’s assets in the event of a liquidation or dissolution. With the exception of the Series B, F, G and T Preferred Stock, if any dividend payable on these series is in arrears for three or more semi-annual or six or more quarterly dividend periods, as applicable (whether consecutive or not), the holders of these series and any other class or series of preferred stock ranking equally as to payment of dividends and upon which equivalent voting rights have been conferred and are exercisable (voting as a single class) will be entitled to vote for the election of two additional directors. These voting rights terminate when the Corporation has paid in full dividends on these series for at least two semi-annual or four quarterly dividend periods, as applicable, following the dividend arrearage. The 7.25% Non-Cumulative Perpetual Convertible Preferred Stock, Series L (Series L Preferred Stock) does not have early redemption/call rights. Each share of the Series L Preferred Stock may be converted at any time, at the option of the holder, into 20 shares of the Corporation’s common stock plus cash in lieu of fractional shares. The Corporation may cause some or all of the Series L Preferred Stock, at its option, at any time or from time to time, to be converted into shares of common stock at the then-applicable conversion rate if, for 20 trading days during any period of 30 consecutive trading days, the closing price of common stock exceeds 130 percent of the then-applicable conversion price of the Series L Preferred Stock. If a conversion of Series L Preferred Stock occurs at the option of the holder, subsequent to a dividend record date but prior to the dividend payment date, the Corporation will still pay any accrued dividends payable. Preferred Stock Summary (Dollars in millions, except as noted) Series Description Initial Total Liquidation Carrying (1) Per Annum Redemption Period (2) Series B 7% Cumulative Redeemable June 7,110 $ 100 $ 1 7.00 % n/a Series D (3) 6.204% Non-Cumulative September 26,174 25,000 654 6.204 % On or after Series E (3) Floating Rate Non-Cumulative November 12,691 25,000 317 3-mo. LIBOR + 35 bps (4) On or after Series F Floating Rate Non-Cumulative March 1,409 100,000 141 3-mo. LIBOR + 40 bps (4) On or after Series G Adjustable Rate Non-Cumulative March 4,926 100,000 493 3-mo. LIBOR + 40 bps (4) On or after Series I (3) 6.625% Non-Cumulative September 14,584 25,000 365 6.625 % On or after Series K (5) Fixed-to-Floating Rate Non-Cumulative January 61,773 25,000 1,544 8.00% to, but excluding, 1/30/18; 3-mo. LIBOR + 363 bps thereafter On or after Series L 7.25% Non-Cumulative Perpetual Convertible January 3,080,182 1,000 3,080 7.25 % n/a Series M (5) Fixed-to-Floating Rate Non-Cumulative April 52,399 25,000 1,310 8.125% to, but excluding, 5/15/18; 3-mo. LIBOR + 364 bps thereafter On or after Series T (6) 6% Non-cumulative September 354 100,000 35 6.00 % After May 7, 2019 Series U (5) Fixed-to-Floating Rate Non-Cumulative May 40,000 25,000 1,000 5.2% to, but excluding, 6/1/23; On or after Series V (5) Fixed-to-Floating Rate Non-Cumulative June 60,000 25,000 1,500 5.125% to, but excluding, 6/17/19; 3-mo. LIBOR + 338.7 bps thereafter On or after Series W (3) 6.625% Non-Cumulative September 2014 44,000 25,000 1,100 6.625 % On or after Series X (5) Fixed-to-Floating Rate Non-Cumulative September 2014 80,000 25,000 2,000 6.250% to, but excluding, 9/5/24; 3-mo. LIBOR + 370.5 bps thereafter On or after Series Y (3) 6.500% Non-Cumulative January 2015 44,000 25,000 1,100 6.500 % On or after Series Z (5) Fixed-to-Floating Rate Non-Cumulative October 2014 56,000 25,000 1,400 6.500% to, but excluding,10/23/24; 3-mo. LIBOR + 417.4 bps thereafter On or after Series AA (5) Fixed-to-Floating Rate Non-Cumulative March 2015 76,000 25,000 1,900 6.100% to, but excluding, 3/17/25; 3-mo. LIBOR + 389.8 bps thereafter On or after Series CC (3) 6.200% Non-Cumulative January 2016 44,000 25,000 1,100 6.200 % On or after Series DD (5) Fixed-to-Floating Rate Non-Cumulative March 2016 40,000 25,000 1,000 6.300% to, but excluding, 3/10/26; 3-mo. LIBOR + 455.3 bps thereafter On or after Series EE (3) 6.000% Non-Cumulative April 2016 36,000 25,000 900 6.000 % On or after Series 1 (7) Floating Rate Non-Cumulative November 3,275 30,000 98 3-mo. LIBOR + 75 bps (8) On or after Series 2 (7) Floating Rate Non-Cumulative March 9,967 30,000 299 3-mo. LIBOR + 65 bps (8) On or after Series 3 (7) 6.375% Non-Cumulative November 21,773 30,000 653 6.375 % On or after Series 4 (7) Floating Rate Non-Cumulative November 7,010 30,000 210 3-mo. LIBOR + 75 bps (4) On or after Series 5 (7) Floating Rate Non-Cumulative March 14,056 30,000 422 3-mo. LIBOR + 50 bps (4) On or after Total 3,837,683 $ 22,622 (1) Amounts shown are before third-party issuance costs and certain book value adjustments of $299 million . (2) The Corporation may redeem series of preferred stock on or after the redemption date, in whole or in part, at its option, at the liquidation preference plus declared and unpaid dividends. Series B and Series L Preferred Stock do not have early redemption/call rights. (3) Ownership is held in the form of depositary shares, each representing a 1/1,000th interest in a share of preferred stock, paying a quarterly cash dividend, if and when declared. (4) Subject to 4.00% minimum rate per annum. (5) Ownership is held in the form of depositary shares, each representing a 1/25th interest in a share of preferred stock, paying a semi-annual cash dividend, if and when declared, until the first redemption date at which time, it adjusts to a quarterly cash dividend, if and when declared, thereafter. (6) Represents shares that were not surrendered when the holders of Series T preferred stock exercised warrants to acquire 700 million shares of common stock in the third quarter of 2017. (7) Ownership is held in the form of depositary shares, each representing a 1/1,200th interest in a share of preferred stock, paying a quarterly cash dividend, if and when declared. (8) Subject to 3.00% minimum rate per annum. n/a = not applicable

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	12 Months Ended
	Dec. 31, 2017
Equity [Abstract]
Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss) The table below presents the changes in accumulated OCI after-tax for 2015 , 2016 and 2017 . (Dollars in millions) Debt Securities Available-for- Equity Securities Debit Valuation Adjustments Derivatives Employee Benefit Plans Foreign Currency (1) Total Balance, December 31, 2014 $ 1,641 $ 17 n/a $ (1,661 ) $ (3,350 ) $ (669 ) $ (4,022 ) Cumulative adjustment for accounting change — — $ (1,226 ) — — — (1,226 ) Net change (1,625 ) 45 615 584 394 (123 ) (110 ) Balance, December 31, 2015 $ 16 $ 62 $ (611 ) $ (1,077 ) $ (2,956 ) $ (792 ) $ (5,358 ) Net change (1,315 ) (30 ) (156 ) 182 (524 ) (87 ) (1,930 ) Balance, December 31, 2016 $ (1,299 ) $ 32 $ (767 ) $ (895 ) $ (3,480 ) $ (879 ) $ (7,288 ) Net change 91 (30 ) (293 ) 64 288 86 206 Balance, December 31, 2017 $ (1,208 ) $ 2 $ (1,060 ) $ (831 ) $ (3,192 ) $ (793 ) $ (7,082 ) The table below presents the net change in fair value recorded in accumulated OCI, net realized gains and losses reclassified into earnings and other changes for each component of OCI before- and after-tax for 2017 , 2016 and 2015 . Changes in OCI Components Before- and After-tax Before-tax Tax effect After- tax Before-tax Tax effect After- tax Before-tax Tax effect After- tax (Dollars in millions) 2017 2016 2015 Debt securities: Net increase in fair value $ 202 $ 26 $ 228 $ (1,645 ) $ 622 $ (1,023 ) $ (1,564 ) $ 595 $ (969 ) Reclassifications into earnings: Gains on sales of debt securities (255 ) 97 (158 ) (490 ) 186 (304 ) (1,138 ) 432 (706 ) Other income 41 (20 ) 21 19 (7 ) 12 81 (31 ) 50 Net realized gains reclassified into earnings (214 ) 77 (137 ) (471 ) 179 (292 ) (1,057 ) 401 (656 ) Net change (12 ) 103 91 (2,116 ) 801 (1,315 ) (2,621 ) 996 (1,625 ) Available-for-sale marketable equity securities: Net increase (decrease) in fair value 38 (12 ) 26 (49 ) 19 (30 ) 72 (27 ) 45 Net realized gains reclassified into earnings (2) (90 ) 34 (56 ) — — — — — — Net change (52 ) 22 (30 ) (49 ) 19 (30 ) 72 (27 ) 45 Debit valuation adjustments: Net increase (decrease) in fair value (490 ) 171 (319 ) (271 ) 104 (167 ) 436 (166 ) 270 Net realized losses reclassified into earnings (2) 42 (16 ) 26 17 (6 ) 11 556 (211 ) 345 Net change (448 ) 155 (293 ) (254 ) 98 (156 ) 992 (377 ) 615 Derivatives: Net increase (decrease) in fair value (50 ) 1 (49 ) (299 ) 113 (186 ) 55 (22 ) 33 Reclassifications into earnings: Net interest income 327 (122 ) 205 553 (205 ) 348 974 (367 ) 607 Personnel (148 ) 56 (92 ) 32 (12 ) 20 (91 ) 35 (56 ) Net realized losses reclassified into earnings 179 (66 ) 113 585 (217 ) 368 883 (332 ) 551 Net change 129 (65 ) 64 286 (104 ) 182 938 (354 ) 584 Employee benefit plans: Net increase (decrease) in fair value 223 (55 ) 168 (921 ) 329 (592 ) 408 (121 ) 287 Reclassifications into earnings: Prior service cost 4 (1 ) 3 5 (2 ) 3 5 (2 ) 3 Net actuarial losses 175 (60 ) 115 92 (34 ) 58 164 (60 ) 104 Net realized losses reclassified into earnings (3) 179 (61 ) 118 97 (36 ) 61 169 (62 ) 107 Settlements, curtailments and other 3 (1 ) 2 15 (8 ) 7 1 (1 ) — Net change 405 (117 ) 288 (809 ) 285 (524 ) 578 (184 ) 394 Foreign currency: Net increase (decrease) in fair value (439 ) 430 (9 ) 514 (601 ) (87 ) 600 (723 ) (123 ) Net realized gains reclassified into earnings (1,2) (606 ) 701 95 — — — (38 ) 38 — Net change (1,045 ) 1,131 86 514 (601 ) (87 ) 562 (685 ) (123 ) Total other comprehensive income (loss) $ (1,023 ) $ 1,229 $ 206 $ (2,428 ) $ 498 $ (1,930 ) $ 521 $ (631 ) $ (110 ) (1) During 2017 , foreign currency included a pre-tax gain on derivatives and related income tax expense associated with the Corporation’s net investment in its non-U.S. consumer credit card business, which was sold in 2017. The derivative gain was partially offset by a loss on the related foreign currency translation adjustment. (2) Reclassifications of pre-tax AFS marketable equity securities, DVA and foreign currency are recorded in other income in the Consolidated Statement of Income. (3) Reclassifications of pre-tax employee benefit plan costs are recorded in personnel expense in the Consolidated Statement of Income. n/a = not applicable

Earnings Per Common Share

Earnings Per Common Share	12 Months Ended
	Dec. 31, 2017
Earnings Per Share [Abstract]
Earnings Per Common Share	Earnings Per Common Share The calculation of EPS and diluted EPS for 2017 , 2016 and 2015 is presented below. For more information on the calculation of EPS, see Note 1 – Summary of Significant Accounting Principles . (Dollars in millions, except per share information; shares in thousands) 2017 2016 2015 Earnings per common share Net income $ 18,232 $ 17,822 $ 15,910 Preferred stock dividends (1,614 ) (1,682 ) (1,483 ) Net income applicable to common shareholders $ 16,618 $ 16,140 $ 14,427 Average common shares issued and outstanding 10,195,646 10,284,147 10,462,282 Earnings per common share $ 1.63 $ 1.57 $ 1.38 Diluted earnings per common share Net income applicable to common shareholders $ 16,618 $ 16,140 $ 14,427 Add preferred stock dividends due to assumed conversions (1) 186 300 300 Net income allocated to common shareholders $ 16,804 $ 16,440 $ 14,727 Average common shares issued and outstanding 10,195,646 10,284,147 10,462,282 Dilutive potential common shares (2) 582,782 762,659 773,948 Total diluted average common shares issued and outstanding 10,778,428 11,046,806 11,236,230 Diluted earnings per common share $ 1.56 $ 1.49 $ 1.31 (1) Represents the Series T dividends under the “if-converted” method prior to conversion. (2) Includes incremental dilutive shares from RSUs, restricted stock and warrants. In connection with an investment in the Corporation’s Series T preferred stock in 2011, the Series T holders also received warrants to purchase 700 million shares of the Corporation’s common stock at an exercise price of $7.142857 per share. On August 24, 2017, the Series T holders exercised the warrants and acquired the 700 million shares of the Corporation’s common stock using the Series T preferred stock as consideration for the exercise price, which increased common shares outstanding, but had no effect on diluted earnings per share as this conversion had been included in the Corporation’s diluted earnings per share calculation under the applicable accounting guidance. The use of the Series T preferred stock as consideration represents a non-cash financing activity and, accordingly, is not reflected in the Consolidated Statement of Cash Flows. For 2016 and 2015 , the 700 million average dilutive potential common shares were included in the diluted share count under the “if-converted” method. For 2017 , 2016 and 2015 , 62 million average dilutive potential common shares associated with the Series L preferred stock were not included in the diluted share count because the result would have been antidilutive under the “if-converted” method. For 2017 , 2016 and 2015 , average options to purchase 21 million , 45 million and 66 million shares of common stock, respectively, were outstanding but not included in the computation of EPS because the result would have been antidilutive under the treasury stock method. For 2017 , 2016 and 2015 , average warrants to purchase 122 million shares of common stock were outstanding but not included in the computation of EPS because the result would have been antidilutive under the treasury stock method. For 2017, average warrants to purchase 143 million shares of common stock were included in the diluted EPS calculation under the treasury stock method compared to 150 million shares of common stock in both 2016 and 2015 .

Regulatory Requirements and Res

Regulatory Requirements and Restrictions	12 Months Ended
	Dec. 31, 2017
Banking and Thrift [Abstract]
Regulatory Requirements and Restrictions	Regulatory Requirements and Restrictions The Federal Reserve, Office of the Comptroller of the Currency (OCC) and FDIC (collectively, U.S. banking regulators) jointly establish regulatory capital adequacy guidelines for U.S. banking organizations. As a financial holding company, the Corporation is subject to capital adequacy rules issued by the Federal Reserve. The Corporation’s banking entity affiliates are subject to capital adequacy rules issued by the OCC. Basel 3 updated the composition of capital and established a Common equity tier 1 capital ratio. Common equity tier 1 capital primarily includes common stock, retained earnings and accumulated OCI. Basel 3 revised minimum capital ratios and buffer requirements, added a supplementary leverage ratio, and addressed the adequately capitalized minimum requirements under the Prompt Corrective Action (PCA) framework. Finally, Basel 3 established two methods of calculating risk-weighted assets, the Standardized approach and the Advanced approaches. The Corporation and its primary banking entity affiliate, BANA, are Advanced approaches institutions under Basel 3. As Advanced approaches institutions, the Corporation and its banking entity affiliates are required to report regulatory risk-based capital ratios and risk-weighted assets under both the Standardized and Advanced approaches. The approach that yields the lower ratio is used to assess capital adequacy, including under the PCA framework, and was the Advanced approaches method at December 31, 2017 and 2016 . The following table presents capital ratios and related information in accordance with Basel 3 Standardized and Advanced approaches – Transition as measured at December 31, 2017 and 2016 for the Corporation and BANA. Regulatory Capital under Basel 3 – Transition (1) Bank of America Corporation Bank of America, N.A. Standardized Approach Advanced Approaches Regulatory Minimum (2) Standardized Approach Advanced Approaches Regulatory Minimum (3) (Dollars in millions, except as noted) December 31, 2017 Risk-based capital metrics: Common equity tier 1 capital $ 171,063 $ 171,063 $ 150,552 $ 150,552 Tier 1 capital 191,496 191,496 150,552 150,552 Total capital (4) 227,427 218,529 163,243 154,675 Risk-weighted assets (in billions) (5) 1,434 1,449 1,201 1,007 Common equity tier 1 capital ratio 11.9 % 11.8 % 7.25 % 12.5 % 14.9 % 6.5 % Tier 1 capital ratio 13.4 13.2 8.75 12.5 14.9 8.0 Total capital ratio 15.9 15.1 10.75 13.6 15.4 10.0 Leverage-based metrics: Adjusted quarterly average assets (in billions) (6) $ 2,224 $ 2,224 $ 1,672 $ 1,672 Tier 1 leverage ratio 8.6 % 8.6 % 4.0 9.0 % 9.0 % 5.0 December 31, 2016 Risk-based capital metrics: Common equity tier 1 capital $ 168,866 $ 168,866 $ 149,755 $ 149,755 Tier 1 capital 190,315 190,315 149,755 149,755 Total capital (4) 228,187 218,981 163,471 154,697 Risk-weighted assets (in billions) 1,399 1,530 1,176 1,045 Common equity tier 1 capital ratio 12.1 % 11.0 % 5.875 % 12.7 % 14.3 % 6.5 % Tier 1 capital ratio 13.6 12.4 7.375 12.7 14.3 8.0 Total capital ratio 16.3 14.3 9.375 13.9 14.8 10.0 Leverage-based metrics: Adjusted quarterly average assets (in billions) (6) $ 2,131 $ 2,131 $ 1,611 $ 1,611 Tier 1 leverage ratio 8.9 % 8.9 % 4.0 9.3 % 9.3 % 5.0 (1) Under the applicable bank regulatory rules, the Corporation is not required to and, accordingly, will not restate previously-filed regulatory capital metrics and ratios in connection with the change in accounting method as described in Note 1 – Summary of Significant Accounting Principles . Therefore, the December 31, 2016 amounts in the table are as originally reported. The cumulative impact of the change in accounting method resulted in an insignificant pro forma change to the Corporation’s capital metrics and ratios. (2) The December 31, 2017 and 2016 amounts include a transition capital conservation buffer of 1.25 percent and 0.625 percent and a transition global systemically important bank surcharge of 1.5 percent and 0.75 percent . The countercyclical capital buffer for both periods is zero . (3) Percentage required to meet guidelines to be considered “well capitalized” under the PCA framework. (4) Total capital under the Advanced approaches differs from the Standardized approach due to differences in the amount permitted in Tier 2 capital related to the qualifying allowance for credit losses. (5) During the fourth quarter of 2017, the Corporation obtained approval from U.S. banking regulators to use its Internal Models Methodology to calculate counterparty credit risk-weighted assets for derivatives under the Advanced approaches. (6) Reflects adjusted average total assets for the three months ended December 31, 2017 and 2016 . The capital adequacy rules issued by the U.S. banking regulators require institutions to meet the established minimums outlined in the table above. Failure to meet the minimum requirements can lead to certain mandatory and discretionary actions by regulators that could have a material adverse impact on the Corporation’s financial position. At December 31, 2017 and 2016 , the Corporation and its banking entity affiliates were “well capitalized.” Other Regulatory Matters The Federal Reserve requires the Corporation’s bank subsidiaries to maintain reserve requirements based on a percentage of certain deposit liabilities. The average daily reserve balance requirements, in excess of vault cash, maintained by the Corporation with the Federal Reserve were $8.9 billion and $7.7 billion for 2017 and 2016 . At December 31, 2017 and 2016 , the Corporation had cash and cash equivalents in the amount of $4.1 billion and $4.8 billion , and securities with a fair value of $17.3 billion and $14.6 billion that were segregated in compliance with securities regulations. In addition, at December 31, 2017 and 2016 , the Corporation had cash deposited with clearing organizations of $11.9 billion and $10.2 billion primarily recorded in other assets on the Consolidated Balance Sheet. The primary sources of funds for cash distributions by the Corporation to its shareholders are capital distributions received from its bank subsidiaries, BANA and Bank of America California, N.A. In 2017 , the Corporation received dividends of $22.2 billion from BANA and $275 million from Bank of America California, N.A. The amount of dividends that a subsidiary bank may declare in a calendar year is the subsidiary bank’s net profits for that year combined with its retained net profits for the preceding two years. Retained net profits, as defined by the OCC, consist of net income less dividends declared during the period. In 2018 , BANA can declare and pay dividends of approximately $6.0 billion to the Corporation plus an additional amount equal to its retained net profits for 2018 up to the date of any such dividend declaration. Bank of America California, N.A. can pay dividends of $195 million in 2018 plus an additional amount equal to its retained net profits for 2018 up to the date of any such dividend declaration.

Employee Benefit Plans

Employee Benefit Plans	12 Months Ended
	Dec. 31, 2017
Retirement Benefits [Abstract]
Employee Benefit Plans	Employee Benefit Plans Pension and Postretirement Plans The Corporation sponsors a qualified noncontributory trusteed pension plan (Qualified Pension Plan), a number of noncontributory nonqualified pension plans, and postretirement health and life plans that cover eligible employees. Non-U.S. pension plans sponsored by the Corporation vary based on the country and local practices. The Qualified Pension Plan has a balance guarantee feature for account balances with participant-selected investments, applied at the time a benefit payment is made from the plan that effectively provides principal protection for participant balances transferred and certain compensation credits. The Corporation is responsible for funding any shortfall on the guarantee feature. Benefits earned under the Qualified Pension Plan have been frozen. Thereafter, the cash balance accounts continue to earn investment credits or interest credits in accordance with the terms of the plan document. The Corporation has an annuity contract that guarantees the payment of benefits vested under a terminated U.S. pension plan (Other Pension Plan). The Corporation, under a supplemental agreement, may be responsible for, or benefit from actual experience and investment performance of the annuity assets. The Corporation made no contribution under this agreement in 2017 or 2016 . Contributions may be required in the future under this agreement. The Corporation’s noncontributory, nonqualified pension plans are unfunded and provide supplemental defined pension benefits to certain eligible employees. In addition to retirement pension benefits, certain benefits-eligible employees may become eligible to continue participation as retirees in health care and/or life insurance plans sponsored by the Corporation. These plans are referred to as the Postretirement Health and Life Plans. During 2017 , the Corporation established and funded a Voluntary Employees’ Beneficiary Association trust in the amount of $300 million for the Postretirement Health and Life Plans. The Pension and Postretirement Plans table summarizes the changes in the fair value of plan assets, changes in the projected benefit obligation (PBO), the funded status of both the accumulated benefit obligation (ABO) and the PBO, and the weighted-average assumptions used to determine benefit obligations for the pension plans and postretirement plans at December 31, 2017 and 2016 . The estimate of the Corporation’s PBO associated with these plans considers various actuarial assumptions, including assumptions for mortality rates and discount rates. The discount rate assumptions are derived from a cash flow matching technique that utilizes rates that are based on Aa-rated corporate bonds with cash flows that match estimated benefit payments of each of the plans. The decreases in the weighted-average discount rate in 2017 and 2016 resulted in increases to the PBO of approximately $1.1 billion and $1.3 billion at December 31, 2017 and 2016 . Pension and Postretirement Plans (1) Qualified Pension Plan Non-U.S. Pension Plans Nonqualified and Other Pension Plans Postretirement Health and Life Plans (Dollars in millions) 2017 2016 2017 2016 2017 2016 2017 2016 Change in fair value of plan assets Fair value, January 1 $ 18,239 $ 17,962 $ 2,789 $ 2,738 $ 2,744 $ 2,805 $ — $ — Actual return on plan assets 2,285 1,075 118 541 128 74 — — Company contributions — — 23 48 98 104 393 104 Plan participant contributions — — 1 1 — — 125 125 Settlements and curtailments — — (190 ) (20 ) — (6 ) — — Benefits paid (816 ) (798 ) (54 ) (118 ) (246 ) (233 ) (230 ) (242 ) Federal subsidy on benefits paid n/a n/a n/a n/a n/a n/a 12 13 Foreign currency exchange rate changes n/a n/a 256 (401 ) n/a n/a n/a n/a Fair value, December 31 $ 19,708 $ 18,239 $ 2,943 $ 2,789 $ 2,724 $ 2,744 $ 300 $ — Change in projected benefit obligation Projected benefit obligation, January 1 $ 14,982 $ 14,461 $ 2,763 $ 2,580 $ 3,047 $ 3,053 $ 1,125 $ 1,152 Service cost — — 24 25 1 — 6 7 Interest cost 606 634 72 86 117 127 43 47 Plan participant contributions — — 1 1 — — 125 125 Plan amendments — — — — — — (19 ) — Settlements and curtailments — — (200 ) (31 ) — (6 ) — — Actuarial loss (gain) 934 685 (26 ) 535 128 106 (7 ) 25 Benefits paid (816 ) (798 ) (54 ) (118 ) (246 ) (233 ) (230 ) (242 ) Federal subsidy on benefits paid n/a n/a n/a n/a n/a n/a 12 13 Foreign currency exchange rate changes n/a n/a 234 (315 ) n/a n/a 1 (2 ) Projected benefit obligation, December 31 $ 15,706 $ 14,982 $ 2,814 $ 2,763 $ 3,047 $ 3,047 $ 1,056 $ 1,125 Amounts recognized on Consolidated Balance Sheet Other assets $ 4,002 $ 3,257 $ 610 $ 475 $ 730 $ 760 $ — $ — Accrued expenses and other liabilities — — (481 ) (449 ) (1,053 ) (1,063 ) (756 ) (1,125 ) Net amount recognized, December 31 $ 4,002 $ 3,257 $ 129 $ 26 $ (323 ) $ (303 ) $ (756 ) $ (1,125 ) Funded status, December 31 Accumulated benefit obligation $ 15,706 $ 14,982 $ 2,731 $ 2,645 $ 3,046 $ 3,046 n/a n/a Overfunded (unfunded) status of ABO 4,002 3,257 212 144 (322 ) (302 ) n/a n/a Provision for future salaries — — 83 118 1 1 n/a n/a Projected benefit obligation 15,706 14,982 2,814 2,763 3,047 3,047 $ 1,056 $ 1,125 Weighted-average assumptions, December 31 Discount rate 3.68 % 4.16 % 2.39 % 2.56 % 3.58 % 4.01 % 3.58 % 3.99 % Rate of compensation increase n/a n/a 4.31 4.51 4.00 4.00 n/a n/a (1) The measurement date for the Qualified Pension Plan, Non-U.S. Pension Plans, Nonqualified and Other Pension Plans, and Postretirement Health and Life Plans was December 31 of each year reported. n/a = not applicable The Corporation’s estimate of its contributions to be made to the Non-U.S. Pension Plans, Nonqualified and Other Pension Plans, and Postretirement Health and Life Plans in 2018 is $17 million , $92 million and $19 million , respectively. The Corporation does not expect to make a contribution to the Qualified Pension Plan in 2018 . It is the policy of the Corporation to fund no less than the minimum funding amount required by the Employee Retirement Income Security Act of 1974 (ERISA). Pension Plans with ABO and PBO in excess of plan assets as of December 31, 2017 and 2016 are presented in the table below. For these plans, funding strategies vary due to legal requirements and local practices. Plans with PBO and ABO in Excess of Plan Assets Non-U.S. Pension Plans Nonqualified and Other Pension Plans (Dollars in millions) 2017 2016 2017 2016 PBO $ 671 $ 626 $ 1,054 $ 1,065 ABO 644 594 1,053 1,064 Fair value of plan assets 191 179 1 1 Components of Net Periodic Benefit Cost Qualified Pension Plan Non-U.S. Pension Plans (Dollars in millions) 2017 2016 2015 2017 2016 2015 Components of net periodic benefit cost (income) Service cost $ — $ — $ — $ 24 $ 25 $ 27 Interest cost 606 634 621 72 86 93 Expected return on plan assets (1,068 ) (1,038 ) (1,045 ) (136 ) (123 ) (133 ) Amortization of net actuarial loss 154 139 170 8 6 6 Other — — — (7 ) 2 1 Net periodic benefit cost (income) $ (308 ) $ (265 ) $ (254 ) $ (39 ) $ (4 ) $ (6 ) Weighted-average assumptions used to determine net cost for years ended December 31 Discount rate 4.16 % 4.51 % 4.12 % 2.56 % 3.59 % 3.56 % Expected return on plan assets 6.00 6.00 6.00 4.73 4.84 5.27 Rate of compensation increase n/a n/a n/a 4.51 4.67 4.70 Nonqualified and Postretirement Health (Dollars in millions) 2017 2016 2015 2017 2016 2015 Components of net periodic benefit cost (income) Service cost $ 1 $ — $ — $ 6 $ 7 $ 8 Interest cost 117 127 122 43 47 48 Expected return on plan assets (95 ) (101 ) (92 ) — — (1 ) Amortization of net actuarial loss (gain) 34 25 34 (21 ) (81 ) (46 ) Other — 3 — 4 4 4 Net periodic benefit cost (income) $ 57 $ 54 $ 64 $ 32 $ (23 ) $ 13 Weighted-average assumptions used to determine net cost for years ended December 31 Discount rate 4.01 % 4.34 % 3.80 % 3.99 % 4.32 % 3.75 % Expected return on plan assets 3.50 3.66 3.26 n/a n/a 6.00 Rate of compensation increase 4.00 4.00 4.00 n/a n/a n/a n/a = not applicable The asset valuation method used to calculate the expected return on plan assets component of net periodic benefit cost for the Qualified Pension Plan recognizes 60 percent of the prior year’s market gains or losses at the next measurement date with the remaining 40 percent spread equally over the subsequent four years. Gains and losses for all benefit plans except postretirement health care are recognized in accordance with the standard amortization provisions of the applicable accounting guidance. Net periodic postretirement health and life expense was determined using the “projected unit credit” actuarial method. For the Postretirement Health and Life Plans, 50 percent of the unrecognized gain or loss at the beginning of the fiscal year (or at subsequent remeasurement) is recognized on a level basis during the year. Assumed health care cost trend rates affect the postretirement benefit obligation and benefit cost reported for the Postretirement Health and Life Plans. The assumed health care cost trend rate used to measure the expected cost of benefits covered by the Postretirement Health and Life Plans is 7.00 percent for 2018 , reducing in steps to 5.00 percent in 2023 and later years. A one-percentage-point increase in assumed health care cost trend rates would have increased the service and interest costs, and the benefit obligation by $1 million and $26 million in 2017 . A one-percentage-point decrease in assumed health care cost trend rates would have lowered the service and interest costs, and the benefit obligation by $1 million and $23 million in 2017 . The Corporation’s net periodic benefit cost (income) recognized for the plans is sensitive to the discount rate and expected return on plan assets. With all other assumptions held constant, a 25 bp decline in the discount rate and expected return on plan assets assumptions would have resulted in an increase in the net periodic benefit cost for the Qualified Pension Plan of approximately $6 million and $45 million in 2017 , and approximately $6 million and $47 million to be recognized in 2018 . For the Non-U.S. Pension Plans, Nonqualified and Other Pension Plans, and Postretirement Health and Life Plans, a 25 bp decline in discount rates and expected return on assets would not have a significant impact on the net periodic benefit cost for 2017 and 2018 . Pretax Amounts Included in Accumulated OCI Qualified Pension Plan Non-U.S. Pension Plans Nonqualified and Other Pension Plans Postretirement Health and Life Plans Total (Dollars in millions) 2017 2016 2017 2016 2017 2016 2017 2016 2017 2016 Net actuarial loss (gain) $ 3,992 $ 4,429 $ 196 $ 216 $ 1,014 $ 953 $ (30 ) $ (44 ) $ 5,172 $ 5,554 Prior service cost (credits) — — 4 4 — — (11 ) 12 (7 ) 16 Amounts recognized in accumulated OCI $ 3,992 $ 4,429 $ 200 $ 220 $ 1,014 $ 953 $ (41 ) $ (32 ) $ 5,165 $ 5,570 Pretax Amounts Recognized in OCI Qualified Pension Plan Non-U.S. Pension Plans Nonqualified Pension Plans Postretirement Life Plans Total (1) (Dollars in millions) 2017 2016 2017 2016 2017 2016 2017 2016 2017 2016 Current year actuarial loss (gain) $ (283 ) $ 648 $ (12 ) $ 100 $ 95 $ 133 $ (7 ) $ 25 $ (207 ) $ 906 Amortization of actuarial gain (loss) (154 ) (139 ) (8 ) (6 ) (34 ) (28 ) 21 81 (175 ) (92 ) Current year prior service cost (credit) — — — — — — (19 ) — (19 ) — Amortization of prior service cost — — — (1 ) — — (4 ) (4 ) (4 ) (5 ) Amounts recognized in OCI $ (437 ) $ 509 $ (20 ) $ 93 $ 61 $ 105 $ (9 ) $ 102 $ (405 ) $ 809 (1) Pretax amounts to be amortized from accumulated OCI as period cost during 2018 are estimated to be $176 million . Plan Assets The Qualified Pension Plan has been established as a retirement vehicle for participants, and trusts have been established to secure benefits promised under the Qualified Pension Plan. The Corporation’s policy is to invest the trust assets in a prudent manner for the exclusive purpose of providing benefits to participants and defraying reasonable expenses of administration. The Corporation’s investment strategy is designed to provide a total return that, over the long term, increases the ratio of assets to liabilities. The strategy attempts to maximize the investment return on assets at a level of risk deemed appropriate by the Corporation while complying with ERISA and any applicable regulations and laws. The investment strategy utilizes asset allocation as a principal determinant for establishing the risk/return profile of the assets. Asset allocation ranges are established, periodically reviewed and adjusted as funding levels and liability characteristics change. Active and passive investment managers are employed to help enhance the risk/return profile of the assets. An additional aspect of the investment strategy used to minimize risk (part of the asset allocation plan) includes matching the exposure of participant-selected investment measures. No plan assets are expected to be returned to the Corporation during 2018 . The assets of the Non-U.S. Pension Plans are primarily attributable to a U.K. pension plan. This U.K. pension plan’s assets are invested prudently so that the benefits promised to members are provided with consideration given to the nature and the duration of the plan’s liabilities. The selected asset allocation strategy is designed to achieve a higher return than the lowest risk strategy. The expected rate of return on plan assets assumption was developed through analysis of historical market returns, historical asset class volatility and correlations, current market conditions, anticipated future asset allocations, the funds’ past experience, and expectations on potential future market returns. The expected return on plan assets assumption is determined using the calculated market-related value for the Qualified Pension Plan and the Other Pension Plan and the fair value for the Non-U.S. Pension Plans and Postretirement Health and Life Plans. The expected return on plan assets assumption represents a long-term average view of the performance of the assets in the Qualified Pension Plan, the Non-U.S. Pension Plans, the Other Pension Plan, and Postretirement Health and Life Plans, a return that may or may not be achieved during any one calendar year. The Other Pension Plan is invested solely in an annuity contract which is primarily invested in fixed-income securities structured such that asset maturities match the duration of the plan’s obligations. The target allocations for 2018 by asset category for the Qualified Pension Plan, Non-U.S. Pension Plans, and Nonqualified and Other Pension Plans are presented in the following table. Equity securities for the Qualified Pension Plan include common stock of the Corporation in the amounts of $261 million ( 1.33 percent of total plan assets) and $203 million ( 1.11 percent of total plan assets) at December 31, 2017 and 2016 . 2018 Target Allocation Percentage Asset Category Qualified Pension Plan Non-U.S. Pension Plans Nonqualified and Other Pension Plans Equity securities 30-60 5-35 0-5 Debt securities 40-70 40-80 95-100 Real estate 0-10 0-15 0-5 Other 0-5 0-25 0-5 Fair Value Measurements For more information on fair value measurements, including descriptions of Level 1, 2 and 3 of the fair value hierarchy and the valuation methods employed by the Corporation, see Note 1 – Summary of Significant Accounting Principles and Note 20 – Fair Value Measurements . Combined plan investment assets measured at fair value by level and in total at December 31, 2017 and 2016 are summarized in the Fair Value Measurements table. Fair Value Measurements Level 1 Level 2 Level 3 Total (Dollars in millions) December 31, 2017 Cash and short-term investments Money market and interest-bearing cash $ 2,190 $ — $ — $ 2,190 Cash and cash equivalent commingled/mutual funds — 1,004 — 1,004 Fixed income U.S. government and agency securities 3,331 854 9 4,194 Corporate debt securities — 2,417 — 2,417 Asset-backed securities — 1,832 — 1,832 Non-U.S. debt securities 693 898 — 1,591 Fixed income commingled/mutual funds 775 1,676 — 2,451 Equity Common and preferred equity securities 5,833 — — 5,833 Equity commingled/mutual funds 271 1,753 — 2,024 Public real estate investment trusts 138 — — 138 Real estate Private real estate — — 93 93 Real estate commingled/mutual funds — 13 831 844 Limited partnerships — 155 85 240 Other investments (1) 101 649 74 824 Total plan investment assets, at fair value $ 13,332 $ 11,251 $ 1,092 $ 25,675 December 31, 2016 Cash and short-term investments Money market and interest-bearing cash $ 776 $ — $ — $ 776 Cash and cash equivalent commingled/mutual funds — 997 — 997 Fixed income U.S. government and agency securities 3,125 816 10 3,951 Corporate debt securities — 1,892 — 1,892 Asset-backed securities — 2,246 — 2,246 Non-U.S. debt securities 789 705 — 1,494 Fixed income commingled/mutual funds 778 1,503 — 2,281 Equity Common and preferred equity securities 6,120 — — 6,120 Equity commingled/mutual funds 735 1,225 — 1,960 Public real estate investment trusts 145 — — 145 Real estate Private real estate — — 150 150 Real estate commingled/mutual funds — 12 748 760 Limited partnerships — 132 38 170 Other investments (1) 15 732 83 830 Total plan investment assets, at fair value $ 12,483 $ 10,260 $ 1,029 $ 23,772 (1) Other investments include interest rate swaps of $156 million and $257 million , participant loans of $20 million and $36 million , commodity and balanced funds of $451 million and $369 million and other various investments of $197 million and $168 million at December 31, 2017 and 2016 . The Level 3 Fair Value Measurements table presents a reconciliation of all plan investment assets measured at fair value using significant unobservable inputs (Level 3) during 2017 , 2016 and 2015 . Level 3 Fair Value Measurements Balance January 1 Actual Return on Reporting Date Purchases, Sales and Settlements Balance December 31 (Dollars in millions) 2017 Fixed income U.S. government and agency securities $ 10 $ — $ (1 ) $ 9 Real estate Private real estate 150 8 (65 ) 93 Real estate commingled/mutual funds 748 63 20 831 Limited partnerships 38 14 33 85 Other investments 83 5 (14 ) 74 Total $ 1,029 $ 90 $ (27 ) $ 1,092 2016 Fixed income U.S. government and agency securities $ 11 $ — $ (1 ) $ 10 Real estate Private real estate 144 1 5 150 Real estate commingled/mutual funds 731 21 (4 ) 748 Limited partnerships 49 (2 ) (9 ) 38 Other investments 102 4 (23 ) 83 Total $ 1,037 $ 24 $ (32 ) $ 1,029 2015 Fixed income U.S. government and agency securities $ 11 $ — $ — $ 11 Real estate Private real estate 127 14 3 144 Real estate commingled/mutual funds 632 37 62 731 Limited partnerships 65 (1 ) (15 ) 49 Other investments 127 (5 ) (20 ) 102 Total $ 962 $ 45 $ 30 $ 1,037 Projected Benefit Payments Benefit payments projected to be made from the Qualified Pension Plan, Non-U.S. Pension Plans, Nonqualified and Other Pension Plans, and Postretirement Health and Life Plans are presented in the table below. Projected Benefit Payments (Dollars in millions) Qualified Pension Plan (1) Non-U.S. Pension Plans (2) Nonqualified and Other Pension Plans (2) Postretirement Health and Life Plans (3) 2018 $ 927 $ 90 $ 237 $ 92 2019 912 98 239 87 2020 924 104 242 84 2021 912 112 239 81 2022 919 121 232 78 2023 - 2027 4,455 695 1,073 343 (1) Benefit payments expected to be made from the plan’s assets. (2) Benefit payments expected to be made from a combination of the plans’ and the Corporation’s assets. (3) Benefit payments (net of retiree contributions) expected to be made from a combination of the plans’ and the Corporation’s assets. Defined Contribution Plans The Corporation maintains qualified and non-qualified defined contribution retirement plans. The Corporation recorded expense of $1.0 billion in each of 2017 , 2016 and 2015 related to the qualified defined contribution plans. At December 31, 2017 and 2016 , 218 million and 224 million shares of the Corporation’s common stock were held by these plans. Payments to the plans for dividends on common stock were $86 million , $60 million and $48 million in 2017 , 2016 and 2015 , respectively. Certain non-U.S. employees are covered under defined contribution pension plans that are separately administered in accordance with local laws.

Stock-based Compensation Plans

Stock-based Compensation Plans	12 Months Ended
	Dec. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-based Compensation Plans	Stock-based Compensation Plans The Corporation administers a number of equity compensation plans, with awards being granted predominantly from the Bank of America Key Employee Equity Plan (KEEP). Under this plan, 450 million shares of the Corporation’s common stock are authorized to be used for grants of awards. During 2017 and 2016, the Corporation granted 85 million and 163 million RSU awards to certain employees under the KEEP . Generally, one-third of the RSUs vest on each of the first three anniversaries of the grant date provided that the employee remains continuously employed with the Corporation during that time. The RSUs are authorized to settle predominantly in shares of common stock of the Corporation, and are expensed ratably over the vesting period, net of estimated forfeitures, for non-retirement eligible employees based on the grant-date fair value of the shares. Certain RSUs will be settled in cash or contain settlement provisions that subject these awards to variable accounting whereby compensation expense is adjusted to fair value based on changes in the share price of the Corporation’s common stock up to the settlement date. Awards granted in years prior to 2016 were predominantly cash settled. Effective October 1, 2017, the Corporation changed its accounting method for determining when stock-based compensation awards granted to retirement-eligible employees are deemed authorized, changing from the grant date to the beginning of the year preceding the grant date when the incentive award plans are generally approved. As a result, the estimated value of the awards is now expensed ratably over the year preceding the grant date. The compensation cost for all prior periods presented herein has been restated. For more information, see Note 1 – Summary of Significant Accounting Principles . The compensation cost for the stock-based plans was $2.2 billion , $2.2 billion and $2.1 billion in 2017 , 2016 and 2015 and the related income tax benefit was $829 million , $835 million and $792 million for 2017 , 2016 and 2015 , respectively. Restricted Stock/Units The table below presents the status at December 31, 2017 of the share-settled restricted stock/units and changes during 2017 . Stock-settled Restricted Stock/Units Shares/Units Weighted- average Grant Date Fair Value Outstanding at January 1, 2017 156,492,946 $ 11.99 Granted 81,555,447 24.58 Vested (52,187,746 ) 12.01 Canceled (6,587,404 ) 16.93 Outstanding at December 31, 2017 179,273,243 17.53 The table below presents the status at December 31, 2017 of the cash-settled RSUs granted under the KEEP and changes during 2017 . Cash-settled Restricted Units Units Outstanding at January 1, 2017 121,235,489 Granted 3,105,988 Vested (79,525,864 ) Canceled (2,605,987 ) Outstanding at December 31, 2017 42,209,626 At December 31, 2017 , there was an estimated $1.1 billion of total unrecognized compensation cost related to certain share-based compensation awards that is expected to be recognized over a period of up to four years, with a weighted-average period of 1.7 years. The total fair value of restricted stock vested in 2017 , 2016 and 2015 was $1.3 billion , $358 million and $145 million , respectively. In 2017 , 2016 and 2015 , the amount of cash paid to settle equity-based awards for all equity compensation plans was $1.9 billion , $1.7 billion and $3.0 billion , respectively. Stock Options The table below presents the status of all option plans at December 31, 2017 and changes during 2017 . Stock Options Options Weighted- average Exercise Price Outstanding at January 1, 2017 42,357,282 $ 50.57 Forfeited (25,769,108 ) 55.15 Outstanding at December 31, 2017 16,588,174 43.44 All options outstanding as of December 31, 2017 were vested and exercisable with a weighted-average remaining contractual term of less than one year and have no aggregate intrinsic value. No options have been granted since 2008.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes On December 22, 2017, the President signed into law the Tax Act which made significant changes to federal income tax law including, among other things, reducing the statutory corporate income tax rate to 21 percent from 35 percent and changing the taxation of the Corporation’s non-U.S. business activities. The estimated impact on net income was $2.9 billion , driven by $2.3 billion in income tax expense, largely from a lower valuation of certain U.S. deferred tax assets and liabilities. The change in the statutory tax rate also impacted the Corporation’s tax-advantaged energy investments, resulting in a downward valuation adjustment of $946 million recorded in other income and a related income tax benefit of $347 million , which when netted against the $2.3 billion , resulted in a net impact on income tax expense of $1.9 billion . For more information on the Tax Act, see Note 1 – Summary of Significant Accounting Principles . The components of income tax expense for 2017 , 2016 and 2015 are presented in the table below. Income Tax Expense (Dollars in millions) 2017 2016 2015 Current income tax expense U.S. federal $ 1,310 $ 302 $ 2,539 U.S. state and local 557 120 210 Non-U.S. 939 984 561 Total current expense 2,806 1,406 3,310 Deferred income tax expense U.S. federal 7,238 5,416 1,855 U.S. state and local 835 (279 ) 515 Non-U.S. 102 656 597 Total deferred expense 8,175 5,793 2,967 Total income tax expense $ 10,981 $ 7,199 $ 6,277 Total income tax expense does not reflect the tax effects of items that are included in OCI each period. For more information, see Note 14 – Accumulated Other Comprehensive Income (Loss) . Other tax effects included in OCI each period resulted in a benefit of $1.2 billion and $498 million in 2017 and 2016 and an expense of $631 million in 2015 . In addition, prior to 2017 , total income tax expense does not reflect tax effects associated with the Corporation’s employee stock plans which decreased common stock and additional paid-in capital $41 million and $44 million in 2016 and 2015 . Income tax expense for 2017 , 2016 and 2015 varied from the amount computed by applying the statutory income tax rate to income before income taxes. A reconciliation of the expected U.S. federal income tax expense, calculated by applying the federal statutory tax rate of 35 percent , to the Corporation’s actual income tax expense, and the effective tax rates for 2017 , 2016 and 2015 are presented in the table below. Reconciliation of Income Tax Expense Amount Percent Amount Percent Amount Percent (Dollars in millions) 2017 2016 2015 Expected U.S. federal income tax expense $ 10,225 35.0 % $ 8,757 35.0 % $ 7,765 35.0 % Increase (decrease) in taxes resulting from: State tax expense, net of federal benefit 881 3.0 420 1.7 438 2.0 Tax law changes (1) 2,281 7.8 348 1.4 289 1.3 Changes in prior-period UTBs, including interest 133 0.5 (328 ) (1.3 ) (52 ) (0.2 ) Nondeductible expenses 97 0.3 180 0.7 40 0.1 Affordable housing/energy/other credits (1,406 ) (4.8 ) (1,203 ) (4.8 ) (1,087 ) (4.9 ) Tax-exempt income, including dividends (672 ) (2.3 ) (562 ) (2.2 ) (539 ) (2.4 ) Non-U.S. tax rate differential (272 ) (0.9 ) (307 ) (1.2 ) (559 ) (2.5 ) Share-based compensation (236 ) (0.8 ) — — — — Other (50 ) (0.2 ) (106 ) (0.5 ) (18 ) (0.1 ) Total income tax expense $ 10,981 37.6 % $ 7,199 28.8 % $ 6,277 28.3 % (1) Amounts for 2016 and 2015 are for Non-U.S. tax law changes. The reconciliation of the beginning unrecognized tax benefits (UTB) balance to the ending balance is presented in the following table. Reconciliation of the Change in Unrecognized Tax Benefits (Dollars in millions) 2017 2016 2015 Balance, January 1 $ 875 $ 1,095 $ 1,068 Increases related to positions taken during the current year 292 104 36 Increases related to positions taken during prior years 750 1,318 187 Decreases related to positions taken during prior years (122 ) (1,091 ) (177 ) Settlements (17 ) (503 ) (1 ) Expiration of statute of limitations (5 ) (48 ) (18 ) Balance, December 31 $ 1,773 $ 875 $ 1,095 At December 31, 2017, 2016 and 2015 , the balance of the Corporation’s UTBs which would, if recognized, affect the Corporation’s effective tax rate was $1.2 billion , $0.6 billion and $0.7 billion , respectively. Included in the UTB balance are some items the recognition of which would not affect the effective tax rate, such as the tax effect of certain temporary differences, the portion of gross state UTBs that would be offset by the tax benefit of the associated federal deduction and the portion of gross non-U.S. UTBs that would be offset by tax reductions in other jurisdictions. The Corporation files income tax returns in more than 100 state and non-U.S. jurisdictions each year. The IRS and other tax authorities in countries and states in which the Corporation has significant business operations examine tax returns periodically (continuously in some jurisdictions). The following table summarizes the status of examinations by major jurisdiction for the Corporation and various subsidiaries at December 31, 2017 . Tax Examination Status Years under Examination (1) Status at December 31 2017 United States 2012 – 2013 IRS Appeals United States 2014 – 2016 Field examination New York 2015 Field examination United Kingdom 2016 To begin in 2018 (1) All tax years subsequent to the years shown remain subject to examination. It is reasonably possible that the UTB balance may decrease by as much as $0.4 billion during the next 12 months, since resolved items will be removed from the balance whether their resolution results in payment or recognition. The Corporation recognized expense of $1 million and $56 million in 2017 and 2016 and a benefit of $82 million in 2015 for interest and penalties, net-of-tax, in income tax expense. At December 31, 2017 and 2016 , the Corporation’s accrual for interest and penalties that related to income taxes, net of taxes and remittances, was $185 million and $167 million . Significant components of the Corporation’s net deferred tax assets and liabilities at December 31, 2017 and 2016 are presented in the following table. Amounts at December 31, 2017 reflect appropriate revaluations as a result of the Tax Act’s new 21 percent federal tax rate. Deferred Tax Assets and Liabilities December 31 (Dollars in millions) 2017 2016 Deferred tax assets Net operating loss carryforwards $ 8,506 $ 9,199 Security, loan and debt valuations 2,939 4,726 Allowance for credit losses 2,598 4,362 Accrued expenses 2,021 3,016 Tax credit carryforwards 1,793 3,125 Employee compensation and retirement benefits 1,705 3,042 Available-for-sale securities 510 784 Other 1,034 1,599 Gross deferred tax assets 21,106 29,853 Valuation allowance (1,644 ) (1,117 ) Total deferred tax assets, net of valuation allowance 19,462 28,736 Deferred tax liabilities Equipment lease financing 2,492 3,489 Tax credit partnerships 734 539 Intangibles 670 1,171 Fee income 601 847 Mortgage servicing rights 349 829 Long-term borrowings 227 355 Other 1,764 1,915 Gross deferred tax liabilities 6,837 9,145 Net deferred tax assets, net of valuation allowance $ 12,625 $ 19,591 The table below summarizes the deferred tax assets and related valuation allowances recognized for the net operating loss (NOL) and tax credit carryforwards at December 31, 2017 . Net Operating Loss and Tax Credit Carryforward Deferred Tax Assets (Dollars in millions) Deferred Tax Asset Valuation Allowance Net Tax Asset First Year Expiring Net operating losses - U.S. $ 868 $ — $ 868 After 2027 Net operating losses - U.K. (1) 5,347 — 5,347 None Net operating losses - other non-U.S. 657 (578 ) 79 Various Net operating losses - U.S. states (2) 1,634 (584 ) 1,050 Various General business credits 1,721 — 1,721 After 2036 Foreign tax credits 72 (72 ) — n/a (1) Represents U.K. broker/dealer net operating losses which may be carried forward indefinitely. (2) The net operating losses and related valuation allowances for U.S. states before considering the benefit of federal deductions were $2.1 billion and $739 million . n/a = not applicable Management concluded that no valuation allowance was necessary to reduce the deferred tax assets related to the U.K. NOL carryforwards and U.S. NOL and general business credit carryforwards since estimated future taxable income will be sufficient to utilize these assets prior to their expiration. The majority of the Corporation’s U.K. net deferred tax assets, which consist primarily of NOLs, are expected to be realized by certain subsidiaries over an extended number of years. Management’s conclusion is supported by financial results, profit forecasts for the relevant entities and the indefinite period to carry forward NOLs. However, a material change in those estimates could lead management to reassess its U.K. valuation allowance conclusions. At December 31, 2017, U.S. federal income taxes had not been provided on approximately $5 billion of temporary differences associated with investments in non-U.S. subsidiaries that are essentially permanent in duration. If the Corporation were to record the associated deferred tax liability, the amount would be approximately $1 billion .

Fair Value Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2017
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements Under applicable accounting standards, fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. The Corporation determines the fair values of its financial instruments under applicable accounting standards that require an entity to maximize the use of observable inputs and minimize the use of unobservable inputs. The Corporation categorizes its financial instruments into three levels based on the established fair value hierarchy. The Corporation conducts a review of its fair value hierarchy classifications on a quarterly basis. Transfers into or out of fair value hierarchy classifications are made if the significant inputs used in the financial models measuring the fair values of the assets and liabilities became unobservable or observable in the current marketplace. These transfers are considered to be effective as of the beginning of the quarter in which they occur. For more information regarding the fair value hierarchy and how the Corporation measures fair value, see Note 1 – Summary of Significant Accounting Principles . The Corporation accounts for certain financial instruments under the fair value option. For more information, see Note 21 – Fair Value Option . Valuation Processes and Techniques The Corporation has various processes and controls in place so that fair value is reasonably estimated. A model validation policy governs the use and control of valuation models used to estimate fair value. This policy requires review and approval of models by personnel who are independent of the front office and periodic reassessments of models so that they are continuing to perform as designed. In addition, detailed reviews of trading gains and losses are conducted on a daily basis by personnel who are independent of the front office. A price verification group, which is also independent of the front office, utilizes available market information including executed trades, market prices and market-observable valuation model inputs so that fair values are reasonably estimated. The Corporation performs due diligence procedures over third-party pricing service providers in order to support their use in the valuation process. Where market information is not available to support internal valuations, independent reviews of the valuations are performed and any material exposures are escalated through a management review process. While the Corporation believes its valuation methods are appropriate and consistent with other market participants, the use of different methodologies or assumptions to determine the fair value of certain financial instruments could result in a different estimate of fair value at the reporting date. During 2017 , there were no changes to valuation approaches or techniques that had, or are expected to have, a material impact on the Corporation’s consolidated financial position or results of operations. Trading Account Assets and Liabilities and Debt Securities The fair values of trading account assets and liabilities are primarily based on actively traded markets where prices are based on either direct market quotes or observed transactions. The fair values of debt securities are generally based on quoted market prices or market prices for similar assets. Liquidity is a significant factor in the determination of the fair values of trading account assets and liabilities and debt securities. Market price quotes may not be readily available for some positions such as positions within a market sector where trading activity has slowed significantly or ceased. Some of these instruments are valued using a discounted cash flow model, which estimates the fair value of the securities using internal credit risk, interest rate and prepayment risk models that incorporate management’s best estimate of current key assumptions such as default rates, loss severity and prepayment rates. Principal and interest cash flows are discounted using an observable discount rate for similar instruments with adjustments that management believes a market participant would consider in determining fair value for the specific security. Other instruments are valued using a net asset value approach which considers the value of the underlying securities. Underlying assets are valued using external pricing services, where available, or matrix pricing based on the vintages and ratings. Situations of illiquidity generally are triggered by the market’s perception of credit uncertainty regarding a single company or a specific market sector. In these instances, fair value is determined based on limited available market information and other factors, principally from reviewing the issuer’s financial statements and changes in credit ratings made by one or more rating agencies. Derivative Assets and Liabilities The fair values of derivative assets and liabilities traded in the OTC market are determined using quantitative models that utilize multiple market inputs including interest rates, prices and indices to generate continuous yield or pricing curves and volatility factors to value the position. The majority of market inputs are actively quoted and can be validated through external sources, including brokers, market transactions and third-party pricing services. When third-party pricing services are used, the methods and assumptions are reviewed by the Corporation. Estimation risk is greater for derivative asset and liability positions that are either option-based or have longer maturity dates where observable market inputs are less readily available, or are unobservable, in which case, quantitative-based extrapolations of rate, price or index scenarios are used in determining fair values. The fair values of derivative assets and liabilities include adjustments for market liquidity, counterparty credit quality and other instrument-specific factors, where appropriate. In addition, the Corporation incorporates within its fair value measurements of OTC derivatives a valuation adjustment to reflect the credit risk associated with the net position. Positions are netted by counterparty, and fair value for net long exposures is adjusted for counterparty credit risk while the fair value for net short exposures is adjusted for the Corporation’s own credit risk. The Corporation also incorporates FVA within its fair value measurements to include funding costs on uncollateralized derivatives and derivatives where the Corporation is not permitted to use the collateral it receives. An estimate of severity of loss is also used in the determination of fair value, primarily based on market data. Loans and Loan Commitments The fair values of loans and loan commitments are based on market prices, where available, or discounted cash flow analyses using market-based credit spreads of comparable debt instruments or credit derivatives of the specific borrower or comparable borrowers. Results of discounted cash flow analyses may be adjusted, as appropriate, to reflect other market conditions or the perceived credit risk of the borrower. Mortgage Servicing Rights The fair values of MSRs are primarily determined using an option-adjusted spread (OAS) valuation approach, which factors in prepayment risk to determine the fair value of MSRs. This approach consists of projecting servicing cash flows under multiple interest rate scenarios and discounting these cash flows using risk-adjusted discount rates. Loans Held-for-sale The fair values of LHFS are based on quoted market prices, where available, or are determined by discounting estimated cash flows using interest rates approximating the Corporation’s current origination rates for similar loans adjusted to reflect the inherent credit risk. The borrower-specific credit risk is embedded within the quoted market prices or is implied by considering loan performance when selecting comparables. Short-term Borrowings and Long-term Debt The Corporation issues structured liabilities that have coupons or repayment terms linked to the performance of debt or equity securities, indices, currencies or commodities. The fair values of these structured liabilities are estimated using quantitative models for the combined derivative and debt portions of the notes. These models incorporate observable and, in some instances, unobservable inputs including security prices, interest rate yield curves, option volatility, currency, commodity or equity rates and correlations among these inputs. The Corporation also considers the impact of its own credit spread in determining the discount rate used to value these liabilities. The credit spread is determined by reference to observable spreads in the secondary bond market. Securities Financing Agreements The fair values of certain reverse repurchase agreements, repurchase agreements and securities borrowed transactions are determined using quantitative models, including discounted cash flow models that require the use of multiple market inputs including interest rates and spreads to generate continuous yield or pricing curves, and volatility factors. The majority of market inputs are actively quoted and can be validated through external sources, including brokers, market transactions and third-party pricing services. Deposits The fair values of deposits are determined using quantitative models, including discounted cash flow models that require the use of multiple market inputs including interest rates and spreads to generate continuous yield or pricing curves, and volatility factors. The majority of market inputs are actively quoted and can be validated through external sources, including brokers, market transactions and third-party pricing services. The Corporation considers the impact of its own credit spread in the valuation of these liabilities. The credit risk is determined by reference to observable credit spreads in the secondary cash market. Asset-backed Secured Financings The fair values of asset-backed secured financings are based on external broker bids, where available, or are determined by discounting estimated cash flows using interest rates approximating the Corporation’s current origination rates for similar loans adjusted to reflect the inherent credit risk. Recurring Fair Value Assets and liabilities carried at fair value on a recurring basis at December 31, 2017 and 2016 , including financial instruments which the Corporation accounts for under the fair value option, are summarized in the following tables. December 31, 2017 Fair Value Measurements (Dollars in millions) Level 1 Level 2 Level 3 Netting Adjustments (1) Assets/Liabilities at Fair Value Assets Federal funds sold and securities borrowed or purchased under agreements to resell $ — $ 52,906 $ — $ — $ 52,906 Trading account assets: U.S. Treasury and agency securities (2, 3) 38,720 1,922 — — 40,642 Corporate securities, trading loans and other — 28,714 1,864 — 30,578 Equity securities (3) 60,747 23,958 235 — 84,940 Non-U.S. sovereign debt (3) 6,545 15,839 556 — 22,940 Mortgage trading loans, MBS and ABS: U.S. government-sponsored agency guaranteed (2) — 20,586 — — 20,586 Mortgage trading loans, ABS and other MBS — 8,174 1,498 — 9,672 Total trading account assets (4) 106,012 99,193 4,153 — 209,358 Derivative assets (3, 5) 6,305 341,178 4,067 (313,788 ) 37,762 AFS debt securities: U.S. Treasury and agency securities 51,915 1,608 — — 53,523 Mortgage-backed securities: Agency — 192,929 — — 192,929 Agency-collateralized mortgage obligations — 6,804 — — 6,804 Non-agency residential — 2,669 — — 2,669 Commercial — 13,684 — — 13,684 Non-U.S. securities 772 5,880 25 — 6,677 Other taxable securities — 5,261 509 — 5,770 Tax-exempt securities — 20,106 469 — 20,575 Total AFS debt securities 52,687 248,941 1,003 — 302,631 Other debt securities carried at fair value: Mortgage-backed securities: Agency-collateralized mortgage obligations — 5 — — 5 Non-agency residential — 2,764 — — 2,764 Non-U.S. securities 8,191 1,297 — — 9,488 Other taxable securities — 229 — — 229 Total other debt securities carried at fair value 8,191 4,295 — — 12,486 Loans and leases — 5,139 571 — 5,710 Mortgage servicing rights (6) — — 2,302 — 2,302 Loans held-for-sale — 1,466 690 — 2,156 Other assets 19,367 789 123 — 20,279 Total assets $ 192,562 $ 753,907 $ 12,909 $ (313,788 ) $ 645,590 Liabilities Interest-bearing deposits in U.S. offices $ — $ 449 $ — $ — $ 449 Federal funds purchased and securities loaned or sold under agreements to repurchase — 36,182 — — 36,182 Trading account liabilities: U.S. Treasury and agency securities 17,266 734 — — 18,000 Equity securities (3) 33,019 3,885 — — 36,904 Non-U.S. sovereign debt (3) 11,976 7,382 — — 19,358 Corporate securities and other — 6,901 24 — 6,925 Total trading account liabilities 62,261 18,902 24 — 81,187 Derivative liabilities (3, 5) 6,029 334,261 5,781 (311,771 ) 34,300 Short-term borrowings — 1,494 — — 1,494 Accrued expenses and other liabilities 21,887 945 8 — 22,840 Long-term debt — 29,923 1,863 — 31,786 Total liabilities $ 90,177 $ 422,156 $ 7,676 $ (311,771 ) $ 208,238 (1) Amounts represent the impact of legally enforceable master netting agreements and also cash collateral held or placed with the same counterparties. (2) Includes $21.3 billion of GSE obligations. (3) During 2017 , for trading account assets and liabilities, $1.1 billion of U.S. Treasury and agency securities assets, $5.3 billion of equity securities assets, $3.1 billion of equity securities liabilities, $3.3 billion of non-U.S. sovereign debt assets and $1.5 billion of non-U.S. sovereign debt liabilities were transferred from Level 1 to Level 2 based on the liquidity of the positions. In addition, $14.1 billion of equity securities assets and $4.3 billion of equity securities liabilities were transferred from Level 2 to Level 1. Also in 2017 , $4.2 billion of derivative assets and $3.0 billion of derivative liabilities were transferred from Level 1 to Level 2 and $758 million of derivative assets and $608 million of derivative liabilities were transferred from Level 2 to Level 1 based on the observability of inputs used to measure fair value. For further disaggregation of derivative assets and liabilities, see Note 2 – Derivatives . (4) Includes securities with a fair value of $16.8 billion that were segregated in compliance with securities regulations or deposited with clearing organizations. This amount is included in the parenthetical disclosure on the Consolidated Balance Sheet. (5) Derivative assets and liabilities reflect the effects of contractual amendments by two central clearing counterparties to legally re-characterize daily cash variation margin from collateral, which secures an outstanding exposure, to settlement, which discharges an outstanding exposure. One of these central clearing counterparties amended its governing documents, which became effective in January 2017. In addition, the Corporation elected to transfer its existing positions to the settlement platform for the other central clearing counterparty in September 2017. (6) MSRs include the $1.7 billion core MSR portfolio held in Consumer Banking , the $135 million non-core MSR portfolio held in All Other and the $510 million non-U.S. MSR portfolio held in Global Markets. December 31, 2016 Fair Value Measurements (Dollars in millions) Level 1 Level 2 Level 3 Netting Adjustments (1) Assets/Liabilities at Fair Value Assets Federal funds sold and securities borrowed or purchased under agreements to resell $ — $ 49,750 $ — $ — $ 49,750 Trading account assets: U.S. Treasury and agency securities (2) 34,587 1,927 — — 36,514 Corporate securities, trading loans and other 171 22,861 2,777 — 25,809 Equity securities 50,169 21,601 281 — 72,051 Non-U.S. sovereign debt 9,578 9,940 510 — 20,028 Mortgage trading loans, MBS and ABS: U.S. government-sponsored agency guaranteed (2) — 15,799 — — 15,799 Mortgage trading loans, ABS and other MBS — 8,797 1,211 — 10,008 Total trading account assets (3) 94,505 80,925 4,779 — 180,209 Derivative assets (4) 7,337 619,848 3,931 (588,604 ) 42,512 AFS debt securities: U.S. Treasury and agency securities 46,787 1,465 — — 48,252 Mortgage-backed securities: Agency — 189,486 — — 189,486 Agency-collateralized mortgage obligations — 8,330 — — 8,330 Non-agency residential — 2,013 — — 2,013 Commercial — 12,322 — — 12,322 Non-U.S. securities 1,934 3,600 229 — 5,763 Other taxable securities — 10,020 594 — 10,614 Tax-exempt securities — 16,618 542 — 17,160 Total AFS debt securities 48,721 243,854 1,365 — 293,940 Other debt securities carried at fair value: Mortgage-backed securities: Agency-collateralized mortgage obligations — 5 — — 5 Non-agency residential — 3,114 25 — 3,139 Non-U.S. securities 15,109 1,227 — — 16,336 Other taxable securities — 240 — — 240 Total other debt securities carried at fair value 15,109 4,586 25 — 19,720 Loans and leases — 6,365 720 — 7,085 Mortgage servicing rights (5) — — 2,747 — 2,747 Loans held-for-sale — 3,370 656 — 4,026 Debt securities in assets of business held for sale 619 — — — 619 Other assets 11,824 1,739 239 — 13,802 Total assets $ 178,115 $ 1,010,437 $ 14,462 $ (588,604 ) $ 614,410 Liabilities Interest-bearing deposits in U.S. offices $ — $ 731 $ — $ — $ 731 Federal funds purchased and securities loaned or sold under agreements to repurchase — 35,407 359 — 35,766 Trading account liabilities: U.S. Treasury and agency securities 15,854 197 — — 16,051 Equity securities 25,884 3,014 — — 28,898 Non-U.S. sovereign debt 9,409 2,103 — — 11,512 Corporate securities and other 163 6,380 27 — 6,570 Total trading account liabilities 51,310 11,694 27 — 63,031 Derivative liabilities (4) 7,173 615,896 5,244 (588,833 ) 39,480 Short-term borrowings — 2,024 — — 2,024 Accrued expenses and other liabilities 12,978 1,643 9 — 14,630 Long-term debt — 28,523 1,514 — 30,037 Total liabilities $ 71,461 $ 695,918 $ 7,153 $ (588,833 ) $ 185,699 (1) Amounts represent the impact of legally enforceable master netting agreements and also cash collateral held or placed with the same counterparties. (2) Includes $17.5 billion of GSE obligations. (3) Includes securities with a fair value of $14.6 billion that were segregated in compliance with securities regulations or deposited with clearing organizations. This amount is included in the parenthetical disclosure on the Consolidated Balance Sheet. (4) During 2016 , $2.3 billion of derivative assets and $2.4 billion of derivative liabilities were transferred from Level 1 to Level 2 and $2.0 billion of derivative assets and $1.8 billion of derivative liabilities were transferred from Level 2 to Level 1 based on the observability of inputs used to measure fair value. For further disaggregation of derivative assets and liabilities, see Note 2 – Derivatives . (5) MSRs include the $2.1 billion core MSR portfolio held in Consumer Banking , the $212 million non-core MSR portfolio held in All Other and the $469 million non-U.S. MSR portfolio held in Global Markets. The following tables present a reconciliation of all assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) during 2017 , 2016 and 2015 , including net realized and unrealized gains (losses) included in earnings and accumulated OCI. Level 3 – Fair Value Measurements in 2017 (1) (Dollars in millions) Balance January 1 2017 Total Realized/Unrealized Gains/(Losses) (2) Gains/ (3) Gross Gross Level 3 Gross Level 3 Balance Change in Unrealized Gains/(Losses) Related to Financial Instruments Still Held (2) Purchases Sales Issuances Settlements Trading account assets: Corporate securities, trading loans and other $ 2,777 $ 229 $ — $ 547 $ (702 ) $ 5 $ (666 ) $ 728 $ (1,054 ) $ 1,864 $ 2 Equity securities 281 18 — 55 (70 ) — (10 ) 146 (185 ) 235 (1 ) Non-U.S. sovereign debt 510 74 (8 ) 53 (59 ) — (73 ) 72 (13 ) 556 70 Mortgage trading loans, ABS and other MBS 1,211 165 (2 ) 1,210 (990 ) — (233 ) 218 (81 ) 1,498 72 Total trading account assets 4,779 486 (10 ) 1,865 (1,821 ) 5 (982 ) 1,164 (1,333 ) 4,153 143 Net derivative assets (4) (1,313 ) (984 ) — 664 (979 ) — 949 48 (99 ) (1,714 ) (409 ) AFS debt securities: Non-U.S. securities 229 2 16 49 — — (271 ) — — 25 — Other taxable securities 594 4 8 5 — — (42 ) 34 (94 ) 509 — Tax-exempt securities 542 1 3 14 (70 ) — (11 ) 35 (45 ) 469 — Total AFS debt securities 1,365 7 27 68 (70 ) — (324 ) 69 (139 ) 1,003 — Other debt securities carried at fair value – Non-agency residential MBS 25 (1 ) — — (21 ) — (3 ) — — — — Loans and leases (5, 6) 720 15 — 3 (34 ) — (126 ) — (7 ) 571 11 Mortgage servicing rights (6, 7) 2,747 70 — — (25 ) 258 (748 ) — — 2,302 (248 ) Loans held-for-sale (5) 656 100 (3 ) 3 (189 ) — (346 ) 501 (32 ) 690 14 Other assets 239 74 (57 ) 2 (189 ) — (10 ) 64 — 123 22 Federal funds purchased and securities loaned or sold under agreements to repurchase (5) (359 ) (5 ) — — — (12 ) 171 (58 ) 263 — — Trading account liabilities – Corporate securities and other (27 ) 14 — 8 (17 ) (2 ) — — — (24 ) 2 Accrued expenses and other liabilities (5) (9 ) — — — — — 1 — — (8 ) — Long-term debt (5) (1,514 ) (135 ) (31 ) 84 — (288 ) 514 (711 ) 218 (1,863 ) (196 ) (1) Assets (liabilities). For assets, increase (decrease) to Level 3 and for liabilities, (increase) decrease to Level 3. (2) Includes gains/losses reported in earnings in the following income statement line items: Trading account assets/liabilities - primarily trading account profits; Net derivative assets - primarily trading account profits and mortgage banking income; MSRs - primarily mortgage banking income; Long-term debt - primarily trading account profits. For MSRs, the amounts reflect the changes in modeled MSR fair value due to observed changes in interest rates, volatility, spreads and the shape of the forward swap curve, and periodic adjustments to the valuation model to reflect changes in the modeled relationships between inputs and projected cash flows, as well as changes in cash flow assumptions including cost to service. (3) Includes unrealized gains/losses in OCI on AFS securities, foreign currency translation adjustments and the impact of changes in the Corporation’s credit spreads on long-term debt accounted for under the fair value option. For more information, see Note 1 – Summary of Significant Accounting Principles . (4) Net derivatives include derivative assets of $4.1 billion and derivative liabilities of $5.8 billion . (5) Amounts represent instruments that are accounted for under the fair value option. (6) Issuances represent loan originations and MSRs recognized following securitizations or whole-loan sales. (7) Settlements represent the net change in fair value of the MSR asset due to the recognition of modeled cash flows and the passage of time. Significant transfers into Level 3, primarily due to decreased price observability, during 2017 included $1.2 billion of trading account assets, $501 million of LHFS and $711 million of long-term debt. Transfers occur on a regular basis for long-term debt instruments due to changes in the impact of unobservable inputs on the value of the embedded derivative in relation to the instrument as a whole. Significant transfers out of Level 3, primarily due to increased price observability, during 2017 included $1.3 billion of trading account assets, $139 million of AFS debt securities, $263 million of federal funds purchased and securities loaned or sold under agreements to repurchase and $218 million of long-term debt. Level 3 – Fair Value Measurements in 2016 (1) Balance 2016 Total Realized/Unrealized Gains/(Losses) (2) Gains/ (3) Gross Gross Level 3 Gross Level 3 Balance Change in Unrealized Gains/(Losses) Related to Financial Instruments Still Held (2) (Dollars in millions) Purchases Sales Issuances Settlements Trading account assets: Corporate securities, trading loans and other $ 2,838 $ 78 $ 2 $ 1,508 $ (847 ) $ — $ (725 ) $ 728 $ (805 ) $ 2,777 $ (82 ) Equity securities 407 74 — 73 (169 ) — (82 ) 70 (92 ) 281 (59 ) Non-U.S. sovereign debt 521 122 91 12 (146 ) — (90 ) — — 510 120 Mortgage trading loans, ABS and other MBS 1,868 188 (2 ) 988 (1,491 ) — (344 ) 158 (154 ) 1,211 64 Total trading account assets 5,634 462 91 2,581 (2,653 ) — (1,241 ) 956 (1,051 ) 4,779 43 Net derivative assets (4) (441 ) 285 — 470 (1,155 ) — 76 (186 ) (362 ) (1,313 ) (376 ) AFS debt securities: Non-agency residential MBS 106 — — — (106 ) — — — — — — Non-U.S. securities — — (6 ) 584 (92 ) — (263 ) 6 — 229 — Other taxable securities 757 4 (2 ) — — — (83 ) — (82 ) 594 — Tax-exempt securities 569 — (1 ) 1 — — (2 ) 10 (35 ) 542 — Total AFS debt securities 1,432 4 (9 ) 585 (198 ) — (348 ) 16 (117 ) 1,365 — Other debt securities carried at fair value – Non-agency residential MBS 30 (5 ) — — — — — — — 25 — Loans and leases (5, 6) 1,620 (44 ) — 69 (553 ) 50 (194 ) 6 (234 ) 720 17 Mortgage servicing rights (6, 7) 3,087 149 — — (80 ) 411 (820 ) — — 2,747 (107 ) Loans held-for-sale (5) 787 79 50 22 (256 ) — (93 ) 173 (106 ) 656 70 Other assets 374 (13 ) — 38 (111 ) — (52 ) 3 — 239 (36 ) Federal funds purchased and securities loaned or sold under agreements to repurchase (5) (335 ) (11 ) — — — (22 ) 27 (19 ) 1 (359 ) 4 Trading account liabilities – Corporate securities and other (21 ) 5 — — (11 ) — — — — (27 ) 4 Short-term borrowings (5) (30 ) 1 — — — — 29 — — — — Accrued expenses and other liabilities (5) (9 ) — — — — — — — — (9 ) — Long-term debt (5) (1,513 ) (74 ) (20 ) 140 — (521 ) 948 (939 ) 465 (1,514 ) (184 ) (1) Assets (liabilities). For assets, increase (decrease) to Level 3 and for liabilities, (increase) decrease to Level 3. (2) Includes gains/losses reported in earnings in the following income statement line items: Trading account assets/liabilities - trading account profits; Net derivative assets - primarily trading account profits and mortgage banking income; MSRs - primarily mortgage banking income; Long-term debt - primarily trading account profits. For MSRs, the amounts reflect the changes in modeled MSR fair value due principally to observed changes in interest rates, volatility, spreads and the shape of the forward swap curve. (3) Includes unrealized gains/losses in OCI on AFS securities, foreign currency translation adjustments and the impact of changes in the Corporation’s credit spreads on long-term debt accounted for under the fair value option. For more information, see Note 1 – Summary of Significant Accounting Principles . (4) Net derivatives include derivative assets of $3.9 billion and derivative liabilities of $5.2 billion . (5) Amounts represent instruments that are accounted for under the fair value option. (6) Issuances represent loan originations and MSRs recognized following securitizations or whole-loan sales. (7) Settlements represent the net change in fair value of the MSR asset due to the recognition of modeled cash flows and the passage of time. Significant transfers into Level 3, primarily due to decreased price observability, during 2016 included $956 million of trading account assets, $186 million of net derivative assets, $173 million of LHFS and $939 million of long-term debt. Transfers occur on a regular basis for long-term debt instruments due to changes in the impact of unobservable inputs on the value of the embedded derivative in relation to the instrument as a whole. Significant transfers out of Level 3, primarily due to increased price observability, during 2016 included $1.1 billion of trading account assets, $362 million of net derivative assets, $117 million of AFS debt securities , $234 million of loans and leases, $106 million of LHFS and $465 million of long-term debt. Level 3 – Fair Value Measurements in 2015 (1) (Dollars in millions) Balance 2015 Total Realized/Unrealized Gains/(Losses) (2) Gains/ (3) Gross Gross Level 3 Gross Level 3 Balance 2015 Change in Unrealized Gains/(Losses) Related to Financial Instruments Still Held (2) Purchases Sales Issuances Settlements Trading account assets: Corporate securities, trading loans and other $ 3,270 $ (31 ) $ (11 ) $ 1,540 $ (1,616 ) $ — $ (1,122 ) $ 1,570 $ (762 ) $ 2,838 $ (123 ) Equity securities 352 9 — 49 (11 ) — (11 ) 41 (22 ) 407 3 Non-U.S. sovereign debt 574 114 (179 ) 185 (1 ) — (145 ) — (27 ) 521 74 Mortgage trading loans, ABS and other MBS 2,063 154 1 1,250 (1,117 ) — (493 ) 50 (40 ) 1,868 (93 ) Total trading account assets 6,259 246 (189 ) 3,024 (2,745 ) — (1,771 ) 1,661 (851 ) 5,634 (139 ) Net derivative assets (4) (920 ) 1,335 (7 ) 273 (863 ) — (261 ) (40 ) 42 (441 ) 605 AFS debt securities: Non-agency residential MBS 279 (12 ) — 134 — — (425 ) 167 (37 ) 106 — Non-U.S. securities 10 — — — — — (10 ) — — — — Other taxable securities 1,667 — — 189 — — (160 ) — (939 ) 757 — Tax-exempt securities 599 — — — — — (30 ) — — 569 — Total AFS debt securities 2,555 (12 ) — 323 — — (625 ) 167 (976 ) 1,432 — Other debt securities carried at fair value – Non-agency residential MBS — (3 ) — 33 — — — — — 30 — Loans and leases (5, 6) 1,983 (23 ) — — (4 ) 57 (237 ) 144 (300 ) 1,620 13 Mortgage servicing rights (6, 7) 3,530 187 — — (393 ) 637 (874 ) — — 3,087 (85 ) Loans held-for-sale (5) 173 (51 ) (8 ) 771 (203 ) 61 (61 ) 203 (98 ) 787 (39 ) Other assets 911 (55 ) — 11 (130 ) — (51 ) 10 (322 ) 374 (61 ) Federal funds purchased and securities loaned or sold under agreements to repurchase (5) — (11 ) — — — (131 ) 217 (411 ) 1 (335 ) — Trading account liabilities – Corporate securities and other (36 ) 19 — 30 (34 ) — — — — (21 ) (3 ) Short-term borrowings (5) — 17 — — — (52 ) 10 (24 ) 19 (30 ) 1 Accrued expenses and other liabilities (5) (10 ) 1 — — — — — — — (9 ) 1 Long-term debt (5) (2,362 ) 287 19 616 — (188 ) 273 (1,592 ) 1,434 (1,513 ) 255 (1) Assets (liabilities). For assets, increase (decrease) to Level 3 and for liabilities, (increase) decrease to Level 3. (2) Includes gains/losses reported in earnings in the following income statement line items: Trading account assets/liabilities - trading account profits; Net derivative assets - primarily trading account profits and mortgage banking income; MSRs - primarily mortgage banking income; Long-term debt - primarily trading account profits. For MSRs, the amounts reflect the changes in modeled MSR fair value due principally to observed changes in interest rates, volatility, spreads and the shape of the forward swap curve. (3) Includes unrealized gains/losses in OCI on AFS securities, foreign currency translation adjustments and the impact of changes in the Corporation’s credit spreads on long-term debt accounted for under the fair value option. For more information, see Note 1 – Summary of Significant Accounting Principles . (4) Net derivatives include derivative assets of $5.1 billion and derivative liabilities of $5.6 billion . (5) Amounts represent instruments that are accounted for under the fair value option. (6) Issuances represent loan originations and MSRs recognized following securitizations or whole-loan sales. (7) Settlements represent the net change in fair value of the MSR asset due to the recognition of modeled cash flows and the passage of time. Significant transfers into Level 3, primarily due to decreased price observability, during 2015 included $1.7 billion of trading account assets, $167 million of AFS debt securities, $144 million of loans and leases, $203 million of LHFS, $411 million of federal funds purchased and securities loaned or sold under agreements to repurchase and $1.6 billion of long-term debt. Transfers occur on a regular basis for these long-term debt instruments due to changes in the impact of unobservable inputs on the value of the embedded derivative in relation to the instrument as a whole. Significant transfers out of Level 3, primarily due to increased price observability, unless otherwise noted, during 2015 included $851 million of trading account assets, as a result of increased market liquidity, $976 million of AFS debt securities, $300 million of loans and leases, $322 million of other assets and $1.4 billion of long-term debt. The following tables present information about significant unobservable inputs related to the Corporation’s material categories of Level 3 financial assets and liabilities at December 31, 2017 and 2016 . Quantitative Information about Level 3 Fair Value Measurements at December 31, 2017 (Dollars in millions) Inputs Financial Instrument Fair Value Valuation Technique Significant Unobservable Inputs Ranges of Inputs Weighted Average Loans and Securities (1) Instruments backed by residential real estate assets $ 871 Discounted cash fl

Fair Value Option

Fair Value Option	12 Months Ended
	Dec. 31, 2017
Fair Value Option [Abstract]
Fair Value Option	Fair Value Option Loans and Loan Commitments The Corporation elects to account for certain consumer and commercial loans and loan commitments that exceed the Corporation’s single-name credit risk concentration guidelines under the fair value option. Lending commitments, both funded and unfunded, are actively managed and monitored and, as appropriate, credit risk for these lending relationships may be mitigated through the use of credit derivatives, with the Corporation’s public side credit view and market perspectives determining the size and timing of the hedging activity. These credit derivatives do not meet the requirements for designation as accounting hedges and therefore are carried at fair value with changes in fair value recorded in other income. Electing the fair value option allows the Corporation to carry these loans and loan commitments at fair value, which is more consistent with management’s view of the underlying economics and the manner in which they are managed. In addition, election of the fair value option allows the Corporation to reduce the accounting volatility that would otherwise result from the asymmetry created by accounting for the financial instruments at historical cost and the credit derivatives at fair value. The Corporation also elected the fair value option for certain loans held in consolidated VIEs. Loans Held-for-sale The Corporation elects to account for residential mortgage LHFS, commercial mortgage LHFS and certain other LHFS under the fair value option with interest income on these LHFS recorded in other interest income. These loans are actively managed and monitored and, as appropriate, certain market risks of the loans may be mitigated through the use of derivatives. The Corporation has elected not to designate the derivatives as qualifying accounting hedges and therefore they are carried at fair value with changes in fair value recorded in other income. The changes in fair value of the loans are largely offset by changes in the fair value of the derivatives. Election of the fair value option allows the Corporation to reduce the accounting volatility that would otherwise result from the asymmetry created by accounting for the financial instruments at the lower of cost or fair value and the derivatives at fair value. The Corporation has not elected to account for certain other LHFS under the fair value option primarily because these loans are floating-rate loans that are not hedged using derivative instruments. Loans Reported as Trading Account Assets The Corporation elects to account for certain loans that are held for the purpose of trading and are risk-managed on a fair value basis under the fair value option. Other Assets The Corporation elects to account for certain long-term fixed-rate margin loans that are hedged with derivatives under the fair value option. Election of the fair value option allows the Corporation to reduce the accounting volatility that would otherwise result from the asymmetry created by accounting for the financial instruments at historical cost and the derivatives at fair value. Securities Financing Agreements The Corporation elects to account for certain securities financing agreements, including resale and repurchase agreements, under the fair value option based on the tenor of the agreements, which reflects the magnitude of the interest rate risk. The majority of securities financing agreements collateralized by U.S. government securities are not accounted for under the fair value option as these contracts are generally short-dated and therefore the interest rate risk is not significant. Long-term Deposits The Corporation elects to account for certain long-term fixed-rate and rate-linked deposits that are hedged with derivatives that do not qualify for hedge accounting under the fair value option. Election of the fair value option allows the Corporation to reduce the accounting volatility that would otherwise result from the asymmetry created by accounting for the financial instruments at historical cost and the derivatives at fair value. The Corporation has not elected to carry other long-term deposits at fair value because they are not hedged using derivatives. Short-term Borrowings The Corporation elects to account for certain short-term borrowings, primarily short-term structured liabilities, under the fair value option because this debt is risk-managed on a fair value basis. The Corporation elects to account for certain asset-backed secured financings, which are also classified in short-term borrowings, under the fair value option. Election of the fair value option allows the Corporation to reduce the accounting volatility that would otherwise result from the asymmetry created by accounting for the asset-backed secured financings at historical cost and the corresponding mortgage LHFS securing these financings at fair value. Long-term Debt The Corporation elects to account for certain long-term debt, primarily structured liabilities, under the fair value option. This long-term debt is either risk-managed on a fair value basis or the related hedges do not qualify for hedge accounting. Fair Value Option Elections The table below provides information about the fair value carrying amount and the contractual principal outstanding of assets and liabilities accounted for under the fair value option at December 31, 2017 and 2016 . Fair Value Option Elections Fair Value Carrying Amount Contractual Principal Outstanding Fair Value Carrying Amount Less Unpaid Principal Fair Value Carrying Amount Contractual Principal Outstanding Fair Value Carrying Amount Less Unpaid Principal December 31, 2017 December 31, 2016 (Dollars in millions) Federal funds sold and securities borrowed or purchased under agreements to resell $ 52,906 $ 52,907 $ (1 ) $ 49,750 $ 49,615 $ 135 Loans reported as trading account assets (1) 5,735 11,804 (6,069 ) 6,215 11,557 (5,342 ) Trading inventory – other 12,027 n/a n/a 8,206 n/a n/a Consumer and commercial loans 5,710 5,744 (34 ) 7,085 7,190 (105 ) Loans held-for-sale 2,156 3,717 (1,561 ) 4,026 5,595 (1,569 ) Customer receivables and other assets 3 n/a n/a 253 250 3 Long-term deposits 449 421 28 731 672 59 Federal funds purchased and securities loaned or sold under agreements to repurchase 36,182 36,187 (5 ) 35,766 35,929 (163 ) Short-term borrowings 1,494 1,494 — 2,024 2,024 — Unfunded loan commitments 120 n/a n/a 173 n/a n/a Long-term debt (2) 31,786 31,512 274 30,037 29,862 175 (1) A significant portion of the loans reported as trading account assets are distressed loans that trade and were purchased at a deep discount to par, and the remainder are loans with a fair value near contractual principal outstanding. (2) Includes structured liabilities with a fair value of $31.4 billion and $29.7 billion , and contractual principal outstanding of $31.1 billion and $29.5 billion at December 31, 2017 and 2016 . n/a = not applicable The following tables provide information about where changes in the fair value of assets and liabilities accounted for under the fair value option are included in the Consolidated Statement of Income for 2017 , 2016 and 2015 . Gains (Losses) Relating to Assets and Liabilities Accounted for Under the Fair Value Option Trading Account Profits Mortgage Banking Income Other Income Total (Dollars in millions) 2017 Federal funds sold and securities borrowed or purchased under agreements to resell $ (57 ) $ — $ — $ (57 ) Loans reported as trading account assets 318 — — 318 Trading inventory – other (1) 3,821 — — 3,821 Consumer and commercial loans (9 ) — 35 26 Loans held-for-sale (2) — 211 87 298 Unfunded loan commitments — — 36 36 Long-term debt (3, 4) (1,044 ) — (146 ) (1,190 ) Other (5) (36 ) — 13 (23 ) Total $ 2,993 $ 211 $ 25 $ 3,229 2016 Federal funds sold and securities borrowed or purchased under agreements to resell $ (64 ) $ — $ 1 $ (63 ) Loans reported as trading account assets 301 — — 301 Trading inventory – other (1) 57 — — 57 Consumer and commercial loans 49 — (37 ) 12 Loans held-for-sale (2) 11 518 6 535 Unfunded loan commitments — — 487 487 Long-term debt (3, 4) (489 ) — (97 ) (586 ) Other (5) (21 ) — 52 31 Total $ (156 ) $ 518 $ 412 $ 774 2015 Federal funds sold and securities borrowed or purchased under agreements to resell $ (195 ) $ — $ — $ (195 ) Loans reported as trading account assets (199 ) — — (199 ) Trading inventory – other (1) 1,284 — — 1,284 Consumer and commercial loans 52 — (295 ) (243 ) Loans held-for-sale (2) (36 ) 673 63 700 Unfunded loan commitments — — (210 ) (210 ) Long-term debt (3, 4) 2,107 — (633 ) 1,474 Other (5) 37 — 23 60 Total $ 3,050 $ 673 $ (1,052 ) $ 2,671 (1) The gains in trading account profits are primarily offset by losses on trading liabilities that hedge these assets. (2) Includes the value of IRLCs on funded loans, including those sold during the period. (3) The majority of the net gains (losses) in trading account profits relate to the embedded derivative in structured liabilities and are offset by gains (losses) on derivatives and securities that hedge these liabilities. (4) For the cumulative impact of changes in the Corporation’s own credit spreads and the amount recognized in OCI, see Note 14 – Accumulated Other Comprehensive Income (Loss) . For more information on how the Corporation’s own credit spread is determined, see Note 20 – Fair Value Measurements . (5) Includes gains (losses) on other assets, long-term deposits, federal funds purchased and securities loaned or sold under agreements to repurchase and short-term borrowings. Gains (Losses) Related to Borrower-specific Credit Risk for Assets Accounted for Under the Fair Value Option (Dollars in millions) 2017 2016 2015 Loans reported as trading account assets $ 24 $ 7 $ 37 Consumer and commercial loans 36 (53 ) (200 ) Loans held-for-sale (22 ) (34 ) 37

Fair Value of Financial Instrum

Fair Value of Financial Instruments	12 Months Ended
	Dec. 31, 2017
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	Fair Value of Financial Instruments Financial instruments are classified within the fair value hierarchy using the methodologies described in Note 20 – Fair Value Measurements . The following disclosures include financial instruments that are not carried at fair value or only a portion of the ending balance is carried at fair value on the Consolidated Balance Sheet. Short-term Financial Instruments The carrying value of short-term financial instruments, including cash and cash equivalents, time deposits placed and other short-term investments, federal funds sold and purchased, certain resale and repurchase agreements, customer and other receivables, customer payables (within accrued expenses and other liabilities on the Consolidated Balance Sheet), and short-term borrowings, approximates the fair value of these instruments. These financial instruments generally expose the Corporation to limited credit risk and have no stated maturities or have short-term maturities and carry interest rates that approximate market. The Corporation accounts for certain resale and repurchase agreements under the fair value option. Under the fair value hierarchy, cash and cash equivalents are classified as Level 1. Time deposits placed and other short-term investments, such as U.S. government securities and short-term commercial paper, are classified as Level 1 or Level 2. Federal funds sold and purchased are classified as Level 2. Resale and repurchase agreements are classified as Level 2 because they are generally short-dated and/or variable-rate instruments collateralized by U.S. government or agency securities. Customer and other receivables primarily consist of margin loans, servicing advances and other accounts receivable and are classified as Level 2 or Level 3. Customer payables and short-term borrowings are classified as Level 2. Held-to-maturity Debt Securities HTM debt securities, which consist primarily of U.S. agency debt securities, are classified as Level 2 using the same methodologies as AFS U.S. agency debt securities. For more information on HTM debt securities, see Note 3 – Securities . Loans The fair values for commercial and consumer loans are generally determined by discounting both principal and interest cash flows expected to be collected using a discount rate for similar instruments with adjustments that the Corporation believes a market participant would consider in determining fair value. The Corporation estimates the cash flows expected to be collected using internal credit risk, interest rate and prepayment risk models that incorporate the Corporation’s best estimate of current key assumptions, such as default rates, loss severity and prepayment speeds for the life of the loan. The carrying value of loans is presented net of the applicable allowance for loan losses and excludes leases. The Corporation accounts for certain commercial loans and residential mortgage loans under the fair value option. Deposits The fair value for certain deposits with stated maturities is determined by discounting contractual cash flows using current market rates for instruments with similar maturities. The carrying value of non-U.S. time deposits approximates fair value. For deposits with no stated maturities, the carrying value is considered to approximate fair value and does not take into account the significant value of the cost advantage and stability of the Corporation’s long-term relationships with depositors. The Corporation accounts for certain long-term fixed-rate deposits under the fair value option. Long-term Debt The Corporation uses quoted market prices, when available, to estimate fair value for its long-term debt. When quoted market prices are not available, fair value is estimated based on current market interest rates and credit spreads for debt with similar terms and maturities. The Corporation accounts for certain structured liabilities under the fair value option. Fair Value of Financial Instruments The carrying values and fair values by fair value hierarchy of certain financial instruments where only a portion of the ending balance was carried at fair value at December 31, 2017 and 2016 are presented in the following table. Fair Value of Financial Instruments Fair Value Carrying Value Level 2 Level 3 Total (Dollars in millions) December 31, 2017 Financial assets Loans $ 904,399 $ 68,586 $ 849,576 $ 918,162 Loans held-for-sale 11,430 10,521 909 11,430 Financial liabilities Deposits 1,309,545 1,309,398 — 1,309,398 Long-term debt 227,402 235,126 1,863 236,989 December 31, 2016 Financial assets Loans $ 873,209 $ 71,793 $ 815,329 $ 887,122 Loans held-for-sale 9,066 8,082 984 9,066 Financial liabilities Deposits 1,260,934 1,261,086 — 1,261,086 Long-term debt 216,823 220,071 1,514 221,585 Commercial Unfunded Lending Commitments Fair values are generally determined using a discounted cash flow valuation approach which is applied using market-based CDS or internally developed benchmark credit curves. The Corporation accounts for certain loan commitments under the fair value option. The carrying values and fair values of the Corporation’s commercial unfunded lending commitments were $897 million and $4.0 billion at December 31, 2017 , and $937 million and $4.9 billion at December 31, 2016 . Substantially all commercial unfunded lending commitments are classified as Level 3. The carrying value of these commitments is included in accrued expenses and other liabilities on the Consolidated Balance Sheet. The Corporation does not estimate the fair values of consumer unfunded lending commitments because, in many instances, the Corporation can reduce or cancel these commitments by providing notice to the borrower. For more information on commitments, see Note 12 – Commitments and Contingencies .

Business Segment Information

Business Segment Information	12 Months Ended
	Dec. 31, 2017
Segment Reporting [Abstract]
Business Segment Information	Business Segment Information The Corporation reports its results of operations through the following four business segments: Consumer Bank ing, GWIM , Global Banking and Global Markets , with the remaining operations recorded in All Other . Consumer Banking Consumer Banking offers a diversified range of credit, banking and investment products and services to consumers and small businesses. Consumer Banking product offerings include traditional savings accounts, money market savings accounts, CDs and IRAs, checking accounts, and investment accounts and products, as well as credit and debit cards, residential mortgages and home equity loans, and direct and indirect loans to consumers and small businesses in the U.S. Consumer Banking includes the impact of servicing residential mortgages and home equity loans in the core portfolio. Global Wealth & Investment Management GWIM provides a high-touch client experience through a network of financial advisors focused on clients with over $250,000 in total investable assets, including tailored solutions to meet clients’ needs through a full set of investment management, brokerage, banking and retirement products. GWIM also provides comprehensive wealth management solutions targeted to high net worth and ultra high net worth clients, as well as customized solutions to meet clients’ wealth structuring, investment management, trust and banking needs, including specialty asset management services. Global Banking Global Banking provides a wide range of lending-related products and services, integrated working capital management and treasury solutions, and underwriting and advisory services through the Corporation’s network of offices and client relationship teams. Global Banking also provides investment banking products to clients. The economics of certain investment banking and underwriting activities are shared primarily between Global Banking and Global Markets under an internal revenue-sharing arrangement. Global Banking clients generally include middle-market companies, commercial real estate firms, not-for-profit companies, large global corporations, financial institutions, leasing clients, and mid-sized U.S.-based businesses requiring customized and integrated financial advice and solutions. Global Markets Global Markets offers sales and trading services, including research, to institutional clients across fixed-income, credit, currency, commodity and equity businesses. Global Markets provides market-making, financing, securities clearing, settlement and custody services globally to institutional investor clients in support of their investing and trading activities. Global Markets also works with commercial and corporate clients to provide risk management products. As a result of market-making activities, Global Markets may be required to manage risk in a broad range of financial products. In addition, the economics of certain investment banking and underwriting activities are shared primarily between Global Markets and Global Banking under an internal revenue-sharing arrangement. All Other All Other consists of ALM activities, equity investments, non-core mortgage loans and servicing activities, the net impact of periodic revisions to the MSR valuation model for both core and non-core MSRs and the related economic hedge results and ineffectiveness, liquidating businesses, and residual expense allocations. ALM activities encompass certain residential mortgages, debt securities, interest rate and foreign currency risk management activities, the impact of certain allocation methodologies and accounting hedge ineffectiveness. The results of certain ALM activities are allocated to the business segments. Equity investments include the merchant services joint venture as well as a portfolio of equity, real estate and other alternative investments. The initial impact of the Tax Act was recorded in All Other . Basis of Presentation The management accounting and reporting process derives segment and business results by utilizing allocation methodologies for revenue and expense. The net income derived for the businesses is dependent upon revenue and cost allocations using an activity-based costing model, funds transfer pricing, and other methodologies and assumptions management believes are appropriate to reflect the results of the business. Total revenue, net of interest expense, includes net interest income on an FTE basis and noninterest income. The adjustment of net interest income to an FTE basis results in a corresponding increase in income tax expense. The segment results also reflect certain revenue and expense methodologies that are utilized to determine net income. The net interest income of the businesses includes the results of a funds transfer pricing process that matches assets and liabilities with similar interest rate sensitivity and maturity characteristics. In segments where the total of liabilities and equity exceeds assets, which are generally deposit-taking segments, the Corporation allocates assets to match liabilities. Net interest income of the business segments also includes an allocation of net interest income generated by certain of the Corporation’s ALM activities. In addition, the business segments are impacted by the migration of customers and clients and their deposit, loan and brokerage balances between businesses. Subsequent to the date of migration, the associated net interest income, noninterest income and noninterest expense are recorded in the business to which the customers or clients migrated. The Corporation’s ALM activities include an overall interest rate risk management strategy that incorporates the use of various derivatives and cash instruments to manage fluctuations in earnings and capital that are caused by interest rate volatility. The Corporation’s goal is to manage interest rate sensitivity so that movements in interest rates do not significantly adversely affect earnings and capital. The results of a majority of the Corporation’s ALM activities are allocated to the business segments and fluctuate based on the performance of the ALM activities. ALM activities include external product pricing decisions including deposit pricing strategies, the effects of the Corporation’s internal funds transfer pricing process and the net effects of other ALM activities. Certain expenses not directly attributable to a specific business segment are allocated to the segments. The costs of certain centralized or shared functions are allocated based on methodologies that reflect utilization. The tables below present net income (loss) and the components thereto (with net interest income on an FTE basis) for 2017 , 2016 and 2015 , and total assets at December 31, 2017 and 2016 for each business segment, as well as All Other, including a reconciliation of the four business segments’ total revenue, net of interest expense, on an FTE basis, and net income to the Consolidated Statement of Income, and total assets to the Consolidated Balance Sheet. Results of Business Segments and All Other At and for the year ended December 31 Total Corporation (1) Consumer Banking (Dollars in millions) 2017 2016 2015 2017 2016 2015 Net interest income (FTE basis) $ 45,592 $ 41,996 $ 39,847 $ 24,307 $ 21,290 $ 20,428 Noninterest income 42,685 42,605 44,007 10,214 10,441 11,091 Total revenue, net of interest expense (FTE basis) 88,277 84,601 83,854 34,521 31,731 31,519 Provision for credit losses 3,396 3,597 3,161 3,525 2,715 2,346 Noninterest expense 54,743 55,083 57,617 17,787 17,654 18,710 Income before income taxes (FTE basis) 30,138 25,921 23,076 13,209 11,362 10,463 Income tax expense (FTE basis) 11,906 8,099 7,166 5,002 4,190 3,814 Net income $ 18,232 $ 17,822 $ 15,910 $ 8,207 $ 7,172 $ 6,649 Period-end total assets $ 2,281,234 $ 2,188,067 $ 749,325 $ 702,333 Global Wealth & Global Banking 2017 2016 2015 2017 2016 2015 Net interest income (FTE basis) $ 6,173 $ 5,759 $ 5,527 $ 10,504 $ 9,471 $ 9,244 Noninterest income 12,417 11,891 12,507 9,495 8,974 8,377 Total revenue, net of interest expense (FTE basis) 18,590 17,650 18,034 19,999 18,445 17,621 Provision for credit losses 56 68 51 212 883 686 Noninterest expense 13,564 13,175 13,938 8,596 8,486 8,482 Income before income taxes (FTE basis) 4,970 4,407 4,045 11,191 9,076 8,453 Income tax expense (FTE basis) 1,882 1,632 1,475 4,238 3,347 3,114 Net income $ 3,088 $ 2,775 $ 2,570 $ 6,953 $ 5,729 $ 5,339 Period-end total assets $ 284,321 $ 298,931 $ 424,533 $ 408,330 Global Markets All Other 2017 2016 2015 2017 2016 2015 Net interest income (FTE basis) $ 3,744 $ 4,558 $ 4,191 $ 864 $ 918 $ 457 Noninterest income (loss) 12,207 11,532 10,822 (1,648 ) (233 ) 1,210 Total revenue, net of interest expense (FTE basis) 15,951 16,090 15,013 (784 ) 685 1,667 Provision for credit losses 164 31 99 (561 ) (100 ) (21 ) Noninterest expense 10,731 10,169 11,374 4,065 5,599 5,113 Income (loss) before income taxes (FTE basis) 5,056 5,890 3,540 (4,288 ) (4,814 ) (3,425 ) Income tax expense (benefit) (FTE basis) 1,763 2,072 1,117 (979 ) (3,142 ) (2,354 ) Net income (loss) $ 3,293 $ 3,818 $ 2,423 $ (3,309 ) $ (1,672 ) $ (1,071 ) Period-end total assets $ 629,007 $ 566,060 $ 194,048 $ 212,413 Business Segment Reconciliations 2017 2016 2015 Segments’ total revenue, net of interest expense (FTE basis) $ 89,061 $ 83,916 $ 82,187 Adjustments (2) : ALM activities 312 (300 ) (208 ) Liquidating businesses and other (1,096 ) 985 1,875 FTE basis adjustment (925 ) (900 ) (889 ) Consolidated revenue, net of interest expense $ 87,352 $ 83,701 $ 82,965 Segments’ total net income 21,541 19,494 16,981 Adjustments, net-of-taxes (2) : ALM activities (355 ) (651 ) (694 ) Liquidating businesses and other (2,954 ) (1,021 ) (377 ) Consolidated net income $ 18,232 $ 17,822 $ 15,910 December 31 2017 2016 Segments’ total assets $ 2,087,186 $ 1,975,654 Adjustments (2) : ALM activities, including securities portfolio 625,488 612,996 Liquidating businesses and other (3) 89,008 118,073 Elimination of segment asset allocations to match liabilities (520,448 ) (518,656 ) Consolidated total assets $ 2,281,234 $ 2,188,067 (1) There were no material intersegment revenues. (2) Adjustments include consolidated income, expense and asset amounts not specifically allocated to individual business segments. (3) At December 31, 2016 , includes assets of the non-U.S. consumer credit card business which were included in assets of business held for sale on the Consolidated Balance Sheet.

Parent Company Information

Parent Company Information	12 Months Ended
	Dec. 31, 2017
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Parent Company Information	Parent Company Information The following tables present the Parent Company-only financial information. This financial information is presented in accordance with bank regulatory reporting requirements. Condensed Statement of Income (Dollars in millions) 2017 2016 2015 Income Dividends from subsidiaries: Bank holding companies and related subsidiaries $ 12,088 $ 4,127 $ 18,970 Nonbank companies and related subsidiaries 202 77 53 Interest from subsidiaries 7,043 2,996 2,004 Other income (loss) 28 111 (623 ) Total income 19,361 7,311 20,404 Expense Interest on borrowed funds from related subsidiaries 189 969 1,169 Other interest expense 5,555 5,096 5,098 Noninterest expense 1,672 2,704 4,631 Total expense 7,416 8,769 10,898 Income (loss) before income taxes and equity in undistributed earnings of subsidiaries 11,945 (1,458 ) 9,506 Income tax expense (benefit) 950 (2,311 ) (3,532 ) Income before equity in undistributed earnings of subsidiaries 10,995 853 13,038 Equity in undistributed earnings (losses) of subsidiaries: Bank holding companies and related subsidiaries 8,725 16,817 3,068 Nonbank companies and related subsidiaries (1,488 ) 152 (196 ) Total equity in undistributed earnings (losses) of subsidiaries 7,237 16,969 2,872 Net income $ 18,232 $ 17,822 $ 15,910 Condensed Balance Sheet December 31 (Dollars in millions) 2017 2016 Assets Cash held at bank subsidiaries (1) $ 4,747 $ 20,248 Securities 596 909 Receivables from subsidiaries: Bank holding companies and related subsidiaries 146,566 117,072 Banks and related subsidiaries 146 171 Nonbank companies and related subsidiaries 4,745 26,500 Investments in subsidiaries: Bank holding companies and related subsidiaries 296,506 287,416 Nonbank companies and related subsidiaries 5,225 6,875 Other assets 14,554 11,038 Total assets (2) $ 473,085 $ 470,229 Liabilities and shareholders’ equity Accrued expenses and other liabilities $ 10,286 $ 14,284 Payables to subsidiaries: Banks and related subsidiaries 359 352 Bank holding companies and related subsidiaries 1 4,013 Nonbank companies and related subsidiaries 9,340 12,010 Long-term debt 185,953 173,375 Total liabilities 205,939 204,034 Shareholders’ equity 267,146 266,195 Total liabilities and shareholders’ equity $ 473,085 $ 470,229 (1) Balance includes third-party cash held of $193 million and $342 million at December 31, 2017 and 2016 . (2) During 2016 , the Corporation entered into intercompany arrangements with certain key subsidiaries under which the Corporation transferred certain parent company assets to NB Holdings Corporation. Condensed Statement of Cash Flows (Dollars in millions) 2017 2016 2015 Operating activities Net income $ 18,232 $ 17,822 $ 15,910 Reconciliation of net income to net cash provided by (used in) operating activities: Equity in undistributed (earnings) losses of subsidiaries (7,237 ) (16,969 ) (2,872 ) Other operating activities, net (2,593 ) (2,860 ) (2,583 ) Net cash provided by (used in) operating activities 8,402 (2,007 ) 10,455 Investing activities Net sales of securities 312 — 15 Net payments to subsidiaries (7,087 ) (65,481 ) (7,944 ) Other investing activities, net (1 ) (308 ) 70 Net cash used in investing activities (6,776 ) (65,789 ) (7,859 ) Financing activities Net decrease in short-term borrowings — (136 ) (221 ) Net decrease in other advances (6,672 ) (44 ) (770 ) Proceeds from issuance of long-term debt 37,704 27,363 26,492 Retirement of long-term debt (29,645 ) (30,804 ) (27,393 ) Proceeds from issuance of preferred stock — 2,947 2,964 Common stock repurchased (12,814 ) (5,112 ) (2,374 ) Cash dividends paid (5,700 ) (4,194 ) (3,574 ) Net cash used in financing activities (17,127 ) (9,980 ) (4,876 ) Net decrease in cash held at bank subsidiaries (15,501 ) (77,776 ) (2,280 ) Cash held at bank subsidiaries at January 1 20,248 98,024 100,304 Cash held at bank subsidiaries at December 31 $ 4,747 $ 20,248 $ 98,024

Performance by Geographical Are

Performance by Geographical Area	12 Months Ended
	Dec. 31, 2017
Segments, Geographical Areas [Abstract]
Performance by Geographical Area	Performance by Geographical Area Since the Corporation’s operations are highly integrated, certain asset, liability, income and expense amounts must be allocated to arrive at total assets, total revenue, net of interest expense, income before income taxes and net income by geographic area. The Corporation identifies its geographic performance based on the business unit structure used to manage the capital or expense deployed in the region as applicable. This requires certain judgments related to the allocation of revenue so that revenue can be appropriately matched with the related capital or expense deployed in the region. (Dollars in millions) Total Assets at Year End (1) Total Revenue, Net of Interest Expense (2) Income Before Income Taxes Net Income U.S. (3) 2017 $ 1,965,490 $ 74,830 $ 25,108 $ 15,550 2016 1,901,043 72,418 22,282 16,183 2015 72,117 20,181 14,711 Asia 2017 103,255 3,405 676 464 2016 85,410 3,365 674 488 2015 3,524 726 457 Europe, Middle East and Africa 2017 189,661 7,907 2,990 1,926 2016 174,934 6,608 1,705 925 2015 6,081 938 516 Latin America and the Caribbean 2017 22,828 1,210 439 292 2016 26,680 1,310 360 226 2015 1,243 342 226 Total Non-U.S. 2017 315,744 12,522 4,105 2,682 2016 287,024 11,283 2,739 1,639 2015 10,848 2,006 1,199 Total Consolidated 2017 $ 2,281,234 $ 87,352 $ 29,213 $ 18,232 2016 2,188,067 83,701 25,021 17,822 2015 82,965 22,187 15,910 (1) Total assets include long-lived assets, which are primarily located in the U.S. (2) There were no material intercompany revenues between geographic regions for any of the periods presented. (3) Substantially reflects the U.S.

Summary of Significant Accoun33

Summary of Significant Accounting Principles (Policies)	12 Months Ended
	Dec. 31, 2017
Accounting Policies [Abstract]
Consolidation	The Consolidated Financial Statements include the accounts of the Corporation and its majority-owned subsidiaries and those variable interest entities (VIEs) where the Corporation is the primary beneficiary. Intercompany accounts and transactions have been eliminated. Results of operations of acquired companies are included from the dates of acquisition and for VIEs, from the dates that the Corporation became the primary beneficiary. Assets held in an agency or fiduciary capacity are not included in the Consolidated Financial Statements. The Corporation accounts for investments in companies for which it owns a voting interest and for which it has the ability to exercise significant influence over operating and financing decisions using the equity method of accounting. These investments are included in other assets. Equity method investments are subject to impairment testing, and the Corporation’s proportionate share of income or loss is included in other income.
Basis of Accounting	The preparation of the Consolidated Financial Statements in conformity with accounting principles generally accepted in the United States of America (GAAP) requires management to make estimates and assumptions that affect reported amounts and disclosures. Realized results could materially differ from those estimates and assumptions. Certain prior-period amounts have been reclassified to conform to current period presentation.
Change in Accounting Method	GAAP requires that stock-based compensation awards be expensed over the service period (the period they are earned), based on their grant-date fair value. Awards to retirement-eligible employees have no future service requirement, and historically, the Corporation has deemed these awards to be authorized on the grant date, resulting in full recognition of the related expense at that time. Effective October 1, 2017, the Corporation changed its accounting method for determining when these awards are deemed authorized, changing from the grant date to the beginning of the year preceding the grant date when the incentive award plans are generally approved. As a result, the estimated value of the awards is now expensed ratably over the year preceding the grant date. The Corporation believes this change is a preferable method of accounting as it is consistent with the accounting method used by several peer institutions for similar awards and results in an improved pattern of expense recognition. Adoption of this change is voluntary and has been adopted retrospectively with all prior periods presented herein being restated. The change in accounting method resulted in a decrease in retained earnings of $ 635 million at January 1, 2015. All other effects of the change on the Consolidated Statement of Income and diluted earnings per share were not material for any period presented; additionally, the impact of the change in accounting method was not material to any interim periods. The change affected consolidated financial information and All Other ; it did not affect the business segments.
New Accounting Pronouncements	Effective January 1, 2017, the Corporation adopted the new accounting standard that simplifies certain aspects of the accounting for share-based payment transactions, including income tax consequences, classification of awards as either equity or liabilities and classification on the statement of cash flows. Under this new accounting standard, all excess tax benefits and tax deficiencies on the delivery of share-based awards are recognized as discrete items in income tax expense or benefit in the Consolidated Statement of Income. Previously such amounts were recorded in shareholders’ equity. The adoption of this new accounting standard resulted in $236 million of tax benefits upon the delivery of share-settled awards in 2017. Revenue Recognition Effective January 1, 2018, the Corporation adopted the new accounting standard for recognizing revenue from contracts with customers. The new standard does not impact the timing or measurement of the Corporation’s revenue recognition as it is consistent with the Corporation’s existing accounting for contracts within the scope of the new standard. However, beginning prospectively in 2018, the Corporation’s presentation of certain costs, which are primarily related to underwriting activities, will be presented as operating expenses under the new standard rather than presented net in investment banking income, resulting in an expected increase to both line items of approximately $ 200 million for the year. The new accounting standard does not have a material impact on the Corporation’s consolidated financial position or results of operations and will not have a material impact on the disclosures in the Notes to the Consolidated Financial Statements. Hedge Accounting Effective January 1, 2018, the Corporation early adopted the new standard that simplifies and expands the ability to apply hedge accounting to certain risk management activities. The accounting standard does not have a material impact on the Corporation’s consolidated financial position or results of operations and will not have a material impact on the disclosures in the Notes to the Consolidated Financial Statements. The Corporation recognized an insignificant cumulative-effect adjustment to its January 1, 2018 opening retained earnings to reflect the impact of applying the new standard to certain outstanding hedge strategies, mainly related to fair value hedges of fixed-rate debt instruments. Recognition and Measurement of Financial Assets and Financial Liabilities The Financial Accounting Standards Board (FASB) issued a new accounting standard on recognition and measurement of financial instruments, including certain equity investments and financial liabilities recorded at fair value under the fair value option. Effective January 1, 2015, the Corporation early adopted the provisions related to debit valuation adjustments (DVA) on financial liabilities accounted for under the fair value option. The Corporation adopted the remaining provisions on January 1, 2018, which will not have a material impact on the Corporation’s consolidated financial position, results of operations or disclosures in the Notes to the Consolidated Financial Statements. Tax Effects in Accumulated Other Comprehensive Income The FASB issued a new accounting standard effective on January 1, 2019, with early adoption permitted, that addresses certain tax effects in accumulated other comprehensive income (OCI) related to the Tax Act. Under this new accounting standard, those tax effects, representing the difference between the newly enacted federal tax rate of 21 percent and the historical tax rate, may, at the entity’s election, be reclassified from accumulated OCI to retained earnings. The new accounting standard can be applied retrospectively to each period in which the effects of the change in federal tax rate are recognized or applied at the beginning of the period of adoption. The new accounting standard will not have a material impact on the Corporation’s consolidated financial position, results of operations or disclosures in the Notes to the Consolidated Financial Statements. Lease Accounting The FASB issued a new accounting standard effective on January 1, 2019 that requires substantially all leases to be recorded as assets and liabilities on the balance sheet. On January 5, 2018, the FASB issued an exposure draft proposing an amendment to the standard that, if approved, would permit companies the option to apply the provisions of the new lease standard either prospectively as of the effective date, without adjusting comparative periods presented, or using a modified retrospective transition applicable to all prior periods presented. The Corporation is in the process of reviewing its existing lease portfolios, including certain service contracts for embedded leases, to evaluate the impact of the standard on the consolidated financial statements, as well as the impact to regulatory capital and risk-weighted assets. The effect of the adoption will depend on the lease portfolio at the time of transition and the transition options ultimately available; however, the Corporation does not expect the new accounting standard to have a material impact on its consolidated financial position, results of operations or disclosures in the Notes to the Consolidated Financial Statements. Accounting for Financial Instruments -- Credit Losses The FASB issued a new accounting standard effective on January 1, 2020, with early adoption permitted on January 1, 2019, that will require the earlier recognition of credit losses on loans and other financial instruments based on an expected loss model, replacing the incurred loss model that is currently in use. The standard also requires expanded credit quality disclosures, including credit quality indicators disaggregated by vintage. The Corporation is in the process of identifying and implementing required changes to loan loss estimation models and processes and evaluating the impact of this new accounting standard, which at the date of adoption is expected to increase the allowance for credit losses with a resulting negative adjustment to retained earnings.
Cash and Cash Equivalents	Cash and cash equivalents include cash on hand, cash items in the process of collection, cash segregated under federal and other brokerage regulations, and amounts due from correspondent banks, the Federal Reserve Bank and certain non-U.S. central banks.
Securities Financing Agreements	Securities borrowed or purchased under agreements to resell and securities loaned or sold under agreements to repurchase (securities financing agreements) are treated as collateralized financing transactions except in instances where the transaction is required to be accounted for as individual sale and purchase transactions. Generally, these agreements are recorded at acquisition or sale price plus accrued interest, except for certain securities financing agreements that the Corporation accounts for under the fair value option. Changes in the fair value of securities financing agreements that are accounted for under the fair value option are recorded in trading account profits in the Consolidated Statement of Income. The Corporation’s policy is to monitor the market value of the principal amount loaned under resale agreements and obtain collateral from or return collateral pledged to counterparties when appropriate. Securities financing agreements do not create material credit risk due to these collateral provisions; therefore, an allowance for loan losses is unnecessary. In transactions where the Corporation acts as the lender in a securities lending agreement and receives securities that can be pledged or sold as collateral, it recognizes an asset on the Consolidated Balance Sheet at fair value, representing the securities received, and a liability, representing the obligation to return those securities.
Collateral	The Corporation accepts securities and loans as collateral that it is permitted by contract or practice to sell or repledge. At December 31, 2017 and 2016 , the fair value of this collateral was $561.9 billion and $452.1 billion , of which $476.1 billion and $372.0 billion was sold or repledged. The primary source of this collateral is securities borrowed or purchased under agreements to resell. The Corporation also pledges company-owned securities and loans as collateral in transactions that include repurchase agreements, securities loaned, public and trust deposits, U.S. Treasury tax and loan notes, and short-term borrowings. This collateral, which in some cases can be sold or repledged by the counterparties to the transactions, is parenthetically disclosed on the Consolidated Balance Sheet. In certain cases, the Corporation has transferred assets to consolidated VIEs where those restricted assets serve as collateral for the interests issued by the VIEs. These assets are included on the Consolidated Balance Sheet in Assets of Consolidated VIEs. In addition, the Corporation obtains collateral in connection with its derivative contracts. Required collateral levels vary depending on the credit risk rating and the type of counterparty. Generally, the Corporation accepts collateral in the form of cash, U.S. Treasury securities and other marketable securities. Based on provisions contained in master netting agreements, the Corporation nets cash collateral received against derivative assets. The Corporation also pledges collateral on its own derivative positions which can be applied against derivative liabilities.
Trading Instruments	Financial instruments utilized in trading activities are carried at fair value. Fair value is generally based on quoted market prices or quoted market prices for similar assets and liabilities. If these market prices are not available, fair values are estimated based on dealer quotes, pricing models, discounted cash flow methodologies, or similar techniques where the determination of fair value may require significant management judgment or estimation. Realized gains and losses are recorded on a trade-date basis. Realized and unrealized gains and losses are recognized in trading account profits.
Derivatives and Hedging Activities	Derivatives are entered into on behalf of customers, for trading or to support risk management activities. Derivatives used in risk management activities include derivatives that are both designated in qualifying accounting hedge relationships and derivatives used to hedge market risks in relationships that are not designated in qualifying accounting hedge relationships (referred to as other risk management activities). The Corporation manages interest rate and foreign currency exchange rate sensitivity predominantly through the use of derivatives. Derivatives utilized by the Corporation include swaps, futures and forward settlement contracts, and option contracts. All derivatives are recorded on the Consolidated Balance Sheet at fair value, taking into consideration the effects of legally enforceable master netting agreements that allow the Corporation to settle positive and negative positions and offset cash collateral held with the same counterparty on a net basis. For exchange-traded contracts, fair value is based on quoted market prices in active or inactive markets or is derived from observable market- based pricing parameters, similar to those applied to over-the-counter (OTC) derivatives. For non-exchange traded contracts, fair value is based on dealer quotes, pricing models, discounted cash flow methodologies or similar techniques for which the determination of fair value may require significant management judgment or estimation. Valuations of derivative assets and liabilities reflect the value of the instrument including counterparty credit risk. These values also take into account the Corporation’s own credit standing. Trading Derivatives and Other Risk Management Activities Derivatives held for trading purposes are included in derivative assets or derivative liabilities on the Consolidated Balance Sheet with changes in fair value included in trading account profits. Derivatives used for other risk management activities are included in derivative assets or derivative liabilities. Derivatives used in other risk management activities have not been designated in qualifying accounting hedge relationships because they did not qualify or the risk that is being mitigated pertains to an item that is reported at fair value through earnings so that the effect of measuring the derivative instrument and the asset or liability to which the risk exposure pertains will offset in the Consolidated Statement of Income to the extent effective. The changes in the fair value of derivatives that serve to mitigate certain risks associated with mortgage servicing rights (MSRs), interest rate lock commitments (IRLCs) and first mortgage loans held-for-sale (LHFS) that are originated by the Corporation are recorded in mortgage banking income. Changes in the fair value of derivatives that serve to mitigate interest rate risk and foreign currency risk are included in other income. Credit derivatives are also used by the Corporation to mitigate the risk associated with various credit exposures. The changes in the fair value of these derivatives are included in other income. Derivatives Used For Hedge Accounting Purposes (Accounting Hedges) For accounting hedges, the Corporation formally documents at inception all relationships between hedging instruments and hedged items, as well as the risk management objectives and strategies for undertaking various accounting hedges. Additionally, the Corporation primarily uses regression analysis at the inception of a hedge and for each reporting period thereafter to assess whether the derivative used in an accounting hedge transaction is expected to be and has been highly effective in offsetting changes in the fair value or cash flows of a hedged item or forecasted transaction. The Corporation discontinues hedge accounting when it is determined that a derivative is not expected to be or has ceased to be highly effective as a hedge, and then reflects changes in fair value of the derivative in earnings after termination of the hedge relationship. Fair value hedges are used to protect against changes in the fair value of the Corporation’s assets and liabilities that are attributable to interest rate or foreign exchange volatility. Changes in the fair value of derivatives designated as fair value hedges are recorded in earnings, together and in the same income statement line item with changes in the fair value of the related hedged item. If a derivative instrument in a fair value hedge is terminated or the hedge designation removed, the previous adjustments to the carrying value of the hedged asset or liability are subsequently accounted for in the same manner as other components of the carrying value of that asset or liability. For interest-earning assets and interest-bearing liabilities, such adjustments are amortized to earnings over the remaining life of the respective asset or liability. Cash flow hedges are used primarily to minimize the variability in cash flows of assets and liabilities, or forecasted transactions caused by interest rate or foreign exchange rate fluctuations. Changes in the fair value of derivatives used in cash flow hedges are recorded in accumulated OCI and are reclassified into the line item in the income statement in which the hedged item is recorded in the same period the hedged item affects earnings. Hedge ineffectiveness and gains and losses on the component of a derivative excluded in assessing hedge effectiveness are recorded in the same income statement line item. Net investment hedges are used to manage the foreign exchange rate sensitivity arising from a net investment in a foreign operation. Changes in the fair value of derivatives designated as net investment hedges of foreign operations, to the extent effective, are recorded as a component of accumulated OCI.
Securities	Debt securities are reported on the Consolidated Balance Sheet at their trade date. Their classification is dependent on the purpose for which the assets were acquired. Debt securities purchased for use in the Corporation’s trading activities are reported in trading account assets at fair value with unrealized gains and losses included in trading account profits. Substantially all other debt securities purchased are used in the Corporation’s asset and liability management (ALM) activities and are reported on the Consolidated Balance Sheet as either debt securities carried at fair value or as debt securities held-to-maturity (HTM). Debt securities carried at fair value are either available-for-sale (AFS) securities with unrealized gains and losses net-of-tax included in accumulated OCI or carried at fair value with unrealized gains and losses reported in other income. Debt securities HTM, which are certain debt securities that management has the intent and ability to hold to maturity, are reported at amortized cost. The Corporation regularly evaluates each AFS and HTM debt security where the value has declined below amortized cost to assess whether the decline in fair value is other than temporary. In determining whether an impairment is other than temporary, the Corporation considers the severity and duration of the decline in fair value, the length of time expected for recovery, the financial condition of the issuer, and other qualitative factors, as well as whether the Corporation either plans to sell the security or it is more-likely-than-not that it will be required to sell the security before recovery of the amortized cost. For AFS debt securities the Corporation intends to hold, an analysis is performed to determine how much of the decline in fair value is related to the issuer’s credit and how much is related to market factors (e.g., interest rates). If any of the decline in fair value is due to credit, an other-than-temporary impairment (OTTI) loss is recognized in the Consolidated Statement of Income for that amount. If any of the decline in fair value is related to market factors, that amount is recognized in accumulated OCI. In certain instances, the credit loss may exceed the total decline in fair value, in which case, the difference is due to market factors and is recognized as an unrealized gain in accumulated OCI. If the Corporation intends to sell or believes it is more-likely-than-not that it will be required to sell the debt security, it is written down to fair value as an OTTI loss. Interest on debt securities, including amortization of premiums and accretion of discounts, is included in interest income. Premiums and discounts are amortized or accreted to interest income at a constant effective yield over the contractual lives of the securities. Realized gains and losses from the sales of debt securities are determined using the specific identification method. Marketable equity securities are classified based on management’s intention on the date of purchase and recorded on the Consolidated Balance Sheet as of the trade date. Marketable equity securities that are bought and held principally for the purpose of resale in the near term are classified as trading and are carried at fair value with unrealized gains and losses included in trading account profits. Other marketable equity securities are accounted for as AFS and classified in other assets. All AFS marketable equity securities are carried at fair value with net unrealized gains and losses included in accumulated OCI, net-of-tax. If there is an other-than-temporary decline in the fair value of any individual AFS marketable equity security, the cost basis is reduced and the Corporation reclassifies the associated net unrealized loss out of accumulated OCI with a corresponding charge to other income. Dividend income on AFS marketable equity securities is included in other income. Realized gains and losses on the sale of all AFS marketable equity securities, which are recorded in other income, are determined using the specific identification method.
Loans and Leases	Loans, with the exception of loans accounted for under the fair value option, are measured at historical cost and reported at their outstanding principal balances net of any unearned income, charge-offs, unamortized deferred fees and costs on originated loans, and for purchased loans, net of any unamortized premiums or discounts. Loan origination fees and certain direct origination costs are deferred and recognized as adjustments to interest income over the lives of the related loans. Unearned income, discounts and premiums are amortized to interest income using a level yield methodology. The Corporation elects to account for certain consumer and commercial loans under the fair value option with changes in fair value reported in other income. Under applicable accounting guidance, for reporting purposes, the loan and lease portfolio is categorized by portfolio segment and, within each portfolio segment, by class of financing receivables. A portfolio segment is defined as the level at which an entity develops and documents a systematic methodology to determine the allowance for credit losses, and a class of financing receivables is defined as the level of disaggregation of portfolio segments based on the initial measurement attribute, risk characteristics and methods for assessing risk. The Corporation’s three portfolio segments are Consumer Real Estate, Credit Card and Other Consumer, and Commercial. The classes within the Consumer Real Estate portfolio segment are residential mortgage and home equity . The classes within the Credit Card and Other Consumer portfolio segment are U.S. credit card, non-U.S. credit card (sold in 2017), direct/indirect consumer and other consumer. The classes within the Commercial portfolio segment are U.S. commercial, non-U.S. commercial, commercial real estate, commercial lease financing and U.S. small business commercial. Purchased Credit-impaired Loans Purchased loans with evidence of credit quality deterioration as of the purchase date for which it is probable that the Corporation will not receive all contractually required payments receivable are accounted for as purchased credit-impaired (PCI) loans. Evidence of credit quality deterioration since origination may include past due status, refreshed credit scores and refreshed loan-to-value (LTV) ratios. At acquisition, PCI loans are recorded at fair value with no allowance for credit losses, and accounted for individually or aggregated in pools based on similar risk characteristics such as credit risk, collateral type and interest rate risk. The Corporation estimates the amount and timing of expected cash flows for each loan or pool of loans. The expected cash flows in excess of the amount paid for the loans is referred to as the accretable yield and is recorded as interest income over the remaining estimated life of the loan or pool of loans. The excess of the PCI loans’ contractual principal and interest over the expected cash flows is referred to as the nonaccretable difference. Over the life of the PCI loans, the expected cash flows continue to be estimated using models that incorporate management’s estimate of current assumptions such as default rates, loss severity and prepayment speeds. If, upon subsequent valuation, the Corporation determines it is probable that the present value of the expected cash flows has decreased, a charge to the provision for credit losses is recorded with a corresponding increase in the allowance for credit losses. If it is probable that there is a significant increase in the present value of expected cash flows, the allowance for credit losses is reduced or, if there is no remaining allowance for credit losses related to these PCI loans, the accretable yield is increased through a reclassification from nonaccretable difference, resulting in a prospective increase in interest income. Reclassifications to or from nonaccretable difference can also occur for changes in the PCI loans’ estimated lives. If a loan within a PCI pool is sold, foreclosed, forgiven or the expectation of any future proceeds is remote, the loan is removed from the pool at its proportional carrying value. If the loan’s recovery value is less than the loan’s carrying value, the difference is first applied against the PCI pool’s nonaccretable difference and then against the allowance for credit losses. Leases The Corporation provides equipment financing to its customers through a variety of lease arrangements. Direct financing leases are carried at the aggregate of lease payments receivable plus estimated residual value of the leased property less unearned income. Leveraged leases, which are a form of financing leases, are reported net of non-recourse debt. Unearned income on leveraged and direct financing leases is accreted to interest income over the lease terms using methods that approximate the interest method.
Allowance for Credit Losses	The allowance for credit losses, which includes the allowance for loan and lease losses and the reserve for unfunded lending commitments, represents management’s estimate of probable losses inherent in the Corporation’s lending activities excluding loans and unfunded lending commitments accounted for under the fair value option. The allowance for loan and lease losses represents the estimated probable credit losses on funded consumer and commercial loans and leases while the reserve for unfunded lending commitments, including standby letters of credit (SBLCs) and binding unfunded loan commitments, represents estimated probable credit losses on these unfunded credit instruments based on utilization assumptions. Lending-related credit exposures deemed to be uncollectible, excluding loans carried at fair value, are charged off against these accounts. Write-offs on PCI loans on which there is a valuation allowance are recorded against the valuation allowance. For more information, see Purchased Credit-impaired Loans in this Note. The Corporation performs periodic and systematic detailed reviews of its lending portfolios to identify credit risks and to assess the overall collectability of those portfolios. The allowance on certain homogeneous consumer loan portfolios, which generally consist of consumer real estate loans within the Consumer Real Estate portfolio segment and credit card loans within the Credit Card and Other Consumer portfolio segment, is based on aggregated portfolio segment evaluations generally by product type. Loss forecast models are utilized for these portfolios which consider a variety of factors including, but not limited to, historical loss experience, estimated defaults or foreclosures based on portfolio trends, delinquencies, bankruptcies, economic conditions, credit scores and the amount of loss in the event of default. For consumer loans secured by residential real estate, using statistical modeling methodologies, the Corporation estimates the number of loans that will default based on the individual loan attributes aggregated into pools of homogeneous loans with similar attributes. The attributes that are most significant to the probability of default and are used to estimate defaults include refreshed LTV or, in the case of a subordinated lien, refreshed combined LTV (CLTV), borrower credit score, months since origination (referred to as vintage) and geography, all of which are further broken down by present collection status (whether the loan is current, delinquent, in default or in bankruptcy). The severity or loss given default is estimated based on the refreshed LTV for first mortgages or CLTV for subordinated liens. The estimates are based on the Corporation’s historical experience with the loan portfolio, adjusted to reflect an assessment of environmental factors not yet reflected in the historical data underlying the loss estimates, such as changes in real estate values, local and national economies, underwriting standards and the regulatory environment. The probability of default models also incorporate recent experience with modification programs including re-defaults subsequent to modification, a loan’s default history prior to modification and the change in borrower payments post-modification. On home equity loans where the Corporation holds only a second-lien position and foreclosure is not the best alternative, the loss severity is estimated at 100 percent . The allowance on certain commercial loans (except business card and certain small business loans) is calculated using loss rates delineated by risk rating and product type. Factors considered when assessing loss rates include the value of the underlying collateral, if applicable, the industry of the obligor, and the obligor’s liquidity and other financial indicators along with certain qualitative factors. These statistical models are updated regularly for changes in economic and business conditions. Included in the analysis of consumer and commercial loan portfolios are reserves which are maintained to cover uncertainties that affect the Corporation’s estimate of probable losses including domestic and global economic uncertainty and large single-name defaults. For impaired loans, which include nonperforming commercial loans as well as consumer and commercial loans and leases modified in a troubled debt restructuring (TDR), management measures impairment pr imarily b ased on the present value of payments expected to be received, discounted at the loans’ original effective contractual interest rates. Credit card loans are discounted at the portfolio average contractual annual percentage rate, excluding promotionally priced loans, in effect prior to restructuring. Impaired loans and TDRs may also be measured based on observable market prices, or for loans that are solely dependent on the collateral for repayment, the estimated fair value of the collateral less costs to sell. If the recorded investment in impaired loans exceeds this amount, a specific allowance is established as a component of the allowance for loan and lease losses unless these are secured consumer loans that are solely dependent on the collateral for repayment, in which case the amount that exceeds the fair value of the collateral is charged off. Generally, the Corporation initially estimates the fair value of the collateral securing these consumer real estate-secured loans using an automated valuation model (AVM). An AVM is a tool that estimates the value of a property by reference to market data including sales of comparable properties and price trends specific to the Metropolitan Statistical Area in which the property being valued is located. In the event that an AVM value is not available, the Corporation utilizes publicized indices or if these methods provide less reliable valuations, the Corporation uses appraisals or broker price opinions to estimate the fair value of the collateral. While there is inherent imprecision in these valuations, the Corporation believes that they are representative of the portfolio in the aggregate. In addition to the allowance for loan and lease losses, the Corporation also estimates probable losses related to unfunded lending commitments, such as letters of credit, financial guarantees and binding unfunded loan commitments. Unfunded lending commitments are subject to individual reviews and are analyzed and segregated by risk according to the Corporation’s internal risk rating scale. These risk classifications, in conjunction with an analysis of historical loss experience, utilization assumptions, current economic conditions, performance trends within the portfolio and any other pertinent information, result in the estimation of the reserve for unfunded lending commitments. The allowance for credit losses related to the loan and lease portfolio is reported separately on the Consolidated Balance Sheet whereas the reserve for unfunded lending commitments is reported on the Consolidated Balance Sheet in accrued expenses and other liabilities. The provision for credit losses related to the loan and lease portfolio and unfunded lending commitments is reported in the Consolidated Statement of Income.
Nonperforming Loans and Leases, Charge-offs and Delinquencies	Nonperforming loans and leases generally include loans and leases that have been placed on nonaccrual status. Loans accounted for under the fair value option, PCI loans and LHFS are not reported as nonperforming. In accordance with the Corporation’s policies, consumer real estate-secured loans, including residential mortgages and home equity loans, are generally placed on nonaccrual status and classified as nonperforming at 90 days past due unless repayment of the loan is insured by the Federal Housing Administration (FHA) or through individually insured long-term standby agreements with Fannie Mae (FNMA) or Freddie Mac (FHLMC) (the fully-insured portfolio). Residential mortgage loans in the fully-insured portfolio are not placed on nonaccrual status and, therefore, are not reported as nonperforming. Junior-lien home equity loans are placed on nonaccrual status and classified as nonperforming when the underlying first-lien mortgage loan becomes 90 days past due even if the junior-lien loan is current. The outstanding balance of real estate-secured loans that is in excess of the estimated property value less costs to sell is charged off no later than the end of the month in which the loan becomes 180 days past due unless the loan is fully insured, or for loans in bankruptcy, within 60 days of receipt of notification of filing, with the remaining balance classified as nonperforming. Consumer loans secured by personal property, credit card loans and other unsecured consumer loans are not placed on nonaccrual status prior to charge-off and, therefore, are not reported as nonperforming loans, except for certain secured consumer loans, including those that have been modified in a TDR. Personal property-secured loans (including auto loans) are charged off to collateral value no later than the end of the month in which the account becomes 120 days past due, or upon repossession of an auto or, for loans in bankruptcy, within 60 days of receipt of notification of filing. Credit card and other unsecured customer loans are charged off no later than the end of the month in which the account becomes 180 days past due or within 60 days after receipt of notification of death, bankruptcy or fraud. Commercial loans and leases, excluding business card loans, that are past due 90 days or more as to principal or interest, or where reasonable doubt exists as to timely collection, including loans that are individually identified as being impaired, are generally placed on nonaccrual status and classified as nonperforming unless well-secured and in the process of collection. Business card loans are charged off no later than the end of the month in which the account becomes 180 days past due or 60 days after receipt of notification of death or bankruptcy. These loans are not placed on nonaccrual status prior to charge-off and, therefore, are not reported as nonperforming loans. Other commercial loans and leases are generally charged off when all or a portion of the principal amount is determined to be uncollectible. The entire balance of a consumer loan or commercial loan or lease is contractually delinquent if the minimum payment is not received by the specified due date on the customer’s billing statement. Interest and fees continue to accrue on past due loans and leases until the date the loan is placed on nonaccrual status, if applicable. Accrued interest receivable is reversed when loans and leases are placed on nonaccrual status. Interest collections on nonaccruing loans and leases for which the ultimate collectability of principal is uncertain are applied as principal reductions; otherwise, such collections are credited to income when received. Loans and leases may be restored to accrual status when all principal and interest is current and full repayment of the remaining contractual principal and interest is expected. PCI loans are recorded at fair value at the acquisition date. Although the PCI loans may be contractually delinquent, the Corporation does not classify these loans as nonperforming as the loans were written down to fair value at the acquisition date and the accretable yield is recognized in interest income over the remaining life of the loan. In addition, reported net charge-offs exclude write-offs on PCI loans as the fair value already considers the estimated credit losses.
Troubled Debt Restructurings	Consumer and commercial loans and leases whose contractual terms have been restructured in a manner that grants a concession to a borrower experiencing financial difficulties are classified as TDRs. Concessions could include a reduction in the interest rate to a rate that is below market on the loan, payment extensions, forgiveness of principal, forbearance or other actions designed to maximize collections. Loans that are carried at fair value, LHFS and PCI loans are not classified as TDRs. Loans and leases whose contractual terms have been modified in a TDR and are current at the time of restructuring may remain on accrual status if there is demonstrated performance prior to the restructuring and payment in full under the restructured terms is expected. Otherwise, the loans are placed on nonaccrual status and reported as nonperforming, except for fully-insured consumer real estate loans, until there is sustained repayment performance for a reasonable period, generally six months. If accruing TDRs cease to perform in accordance with their modified contractual terms, they are placed on nonaccrual status and reported as nonperforming TDRs. Secured consumer loans that have been discharged in Chapter 7 bankruptcy and have not been reaffirmed by the borrower are classified as TDRs at the time of discharge. Such loans are placed on nonaccrual status and written down to the estimated collateral value less costs to sell no later than at the time of discharge. If these loans are contractually current, interest collections are generally recorded in interest income on a cash basis. Consumer real estate-secured loans for which a binding offer to restructure has been extended are also classified as TDRs. Credit card and other unsecured consumer loans that have been renegotiated in a TDR generally remain on accrual status until the loan is either paid in full or charged off, which occurs no later than the end of the month in which the loan becomes 180 days past due or, for loans that have been placed on a fixed payment plan, 120 days past due. A loan that had previously been modified in a TDR and is subsequently refinanced under current underwriting standards at a market rate with no concessionary terms is accounted for as a new loan and is no longer reported as a TDR.
Loans Held-for-sale	Loans that are intended to be sold in the foreseeable future, including residential mortgages, loan syndications, and to a lesser degree, commercial real estate, consumer finance and other loans, are reported as LHFS and are carried at the lower of aggregate cost or fair value. The Corporation accounts for certain LHFS, including residential mortgage LHFS, under the fair value option. Loan origination costs related to LHFS that the Corporation accounts for under the fair value option are recognized in noninterest expense when incurred. Loan origination costs for LHFS carried at the lower of cost or fair value are capitalized as part of the carrying value of the loans and recognized as a reduction of noninterest income upon the sale of such loans. LHFS that are on nonaccrual status and are reported as nonperforming, as defined in the policy herein, are reported separately from nonperforming loans and leases.
Premises and Equipment	Premises and equipment are carried at cost less accumulated depreciation and amortization. Depreciation and amortization are recognized using the straight-line method over the estimated useful lives of the assets. Estimated lives range up to 40 years for buildings, up to 12 years for furniture and equipment, and the shorter of lease term or estimated useful life for leasehold improvements.
Goodwill and Intangible Assets	Goodwill is the purchase premium after adjusting for the fair value of net assets acquired. Goodwill is not amortized but is reviewed for potential impairment on an annual basis, or when events or circumstances indicate a potential impairment, at the reporting unit level. A reporting unit is a business segment or one level below a business segment. The Corporation compares the fair value of each reporting unit with its carrying value, including goodwill, as measured by allocated equity. For purposes of goodwill impairment testing, the Corporation utilizes allocated equity as a proxy for the carrying value of its reporting units. Allocated equity in the reporting units is comprised of allocated capital plus capital for the portion of goodwill and intangibles specifically assigned to the reporting unit. If the fair value of the reporting unit exceeds its carrying value, goodwill of the reporting unit is considered not impaired; however, if the carrying value of the reporting unit exceeds its fair value, an additional step must be performed to measure potential impairment. This step involves calculating an implied fair value of goodwill which is the excess of the fair value of the reporting unit, as determined in the first step, over the aggregate fair values of the assets, liabilities and identifiable intangibles as if the reporting unit was being acquired in a business combination. If the implied fair value of goodwill exceeds the goodwill assigned to the reporting unit, there is no impairment. If the goodwill assigned to a reporting unit exceeds the implied fair value of goodwill, an impairment charge is recorded for the excess. An impairment loss recognized cannot exceed the amount of goodwill assigned to a reporting unit. An impairment loss establishes a new basis in the goodwill and subsequent reversals of goodwill impairment losses are not permitted under applicable accounting guidance. For intangible assets subject to amortization, an impairment loss is recognized if the carrying value of the intangible asset is not recoverable and exceeds fair value. The carrying value of the intangible asset is considered not recoverable if it exceeds the sum of the undiscounted cash flows expected to result from the use of the asset. Intangible assets deemed to have indefinite useful lives are not subject to amortization. An impairment loss is recognized if the carrying value of the intangible asset with an indefinite life exceeds its fair value.
Variable Interest Entities	A VIE is an entity that lacks equity investors or whose equity investors do not have a controlling financial interest in the entity through their equity investments. The Corporation consolidates a VIE if it has both the power to direct the activities of the VIE that most significantly impact the VIE’s economic performance and an obligation to absorb losses or the right to receive benefits that could potentially be significant to the VIE. On a quarterly basis, the Corporation reassesses its involvement with the VIE and evaluates the impact of changes in governing documents and its financial interests in the VIE. The consolidation status of the VIEs with which the Corporation is involved may change as a result of such reassessments. The Corporation primarily uses VIEs for its securitization activities, in which the Corporation transfers whole loans or debt securities into a trust or other vehicle. When the Corporation is the servicer of whole loans held in a securitization trust, including non-agency residential mortgages, home equity loans, credit cards, and other loans, the Corporation has the power to direct the most significant activities of the trust. The Corporation generally does not have the power to direct the most significant activities of a residential mortgage agency trust except in certain circumstances in which the Corporation holds substantially all of the issued securities and has the unilateral right to liquidate the trust. The power to direct the most significant activities of a commercial mortgage securitization trust is typically held by the special servicer or by the party holding specific subordinate securities which embody certain controlling rights. The Corporation consolidates a whole-loan securitization trust if it has the power to direct the most significant activities and also holds securities issued by the trust or has other contractual arrangements, other than standard representations and warranties, that could potentially be significant to the trust. The Corporation may also transfer trading account securities and AFS securities into municipal bond or resecuritization trusts. The Corporation consolidates a municipal bond or resecuritization trust if it has control over the ongoing activities of the trust such as the remarketing of the trust’s liabilities or, if there are no ongoing activities, sole discretion over the design of the trust, including the identification of securities to be transferred in and the structure of securities to be issued, and also retains securities or has liquidity or other commitments that could potentially be significant to the trust. The Corporation does not consolidate a municipal bond or resecuritization trust if one or a limited number of third-party investors share responsibility for the design of the trust or have control over the significant activities of the trust through liquidation or other substantive rights. Other VIEs used by the Corporation include collateralized debt obligations (CDOs), investment vehicles created on behalf of customers and other investment vehicles. The Corporation does not routinely serve as collateral manager for CDOs and, therefore, does not typically have the power to direct the activities that most significantly impact the economic performance of a CDO. However, following an event of default, if the Corporation is a majority holder of senior securities issued by a CDO and acquires the power to manage its assets, the Corporation consolidates the CDO. The Corporation consolidates a customer or other investment vehicle if it has control over the initial design of the vehicle or manages the assets in the vehicle and also absorbs potentially significant gains or losses through an investment in the vehicle, derivative contracts or other arrangements. The Corporation does not consolidate an investment vehicle if a single investor controlled the initial design of the vehicle or manages the assets in the vehicles or if the Corporation does not have a variable interest that could potentially be significant to the vehicle. Retained interests in securitized assets are initially recorded at fair value. In addition, the Corporation may invest in debt securities issued by unconsolidated VIEs. Fair values of these debt securities, which are classified as trading account assets, debt securities carried at fair value or HTM securities, are based primarily on quoted market prices in active or inactive markets. Generally, quoted market prices for retained residual interests are not available; therefore, the Corporation estimates fair values based on the present value of the associated expected future cash flows.
Fair Value	The Corporation measures the fair values of its assets and liabilities, where applicable, in accordance with accounting guidance that requires an entity to base fair value on exit price. Under this guidance, an entity is required to maximize the use of observable inputs and minimize the use of unobservable inputs in measuring fair value. A hierarchy is established which categorizes fair value measurements into three levels based on the inputs to the valuation technique with the highest priority given to unadjusted quoted prices in active markets and the lowest priority given to unobservable inputs. The Corporation categorizes its fair value measurements of financial instruments based on this three-level hierarchy. Level 1 Unadjusted quoted prices in active markets for identical assets or liabilities. Level 1 assets and liabilities include debt and equity securities and derivative contracts that are traded in an active exchange market, as well as certain U.S. Treasury securities that are highly liquid and are actively traded in OTC markets. Level 2 Observable inputs other than Level 1 prices, such as quoted prices for similar assets or liabilities, quoted prices in markets that are not active, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. Level 2 assets and liabilities include debt securities with quoted prices that are traded less frequently than exchange-traded instruments and derivative contracts where fair value is determined using a pricing model with inputs that are observable in the market or can be derived principally from or corroborated by observable market data. This category generally includes U.S. government and agency mortgage-backed (MBS) and asset-backed securities (ABS), corporate debt securities, derivative contracts, certain loans and LHFS. Level 3 Unobservable inputs that are supported by little or no market activity and that are significant to the overall fair value of the assets or liabilities. Level 3 assets and liabilities include financial instruments for which the determination of fair value requires significant management judgment or estimation. The fair value for such assets and liabilities is generally determined using pricing models, discounted cash flow methodologies or similar techniques that incorporate the assumptions a market participant would use in pricing the asset or liability. This category generally includes retained residual interests in securitizations, consumer MSRs, certain ABS, highly structured, complex or long-dated derivative contracts, certain loans and LHFS, IRLCs and certain CDOs where independent pricing information cannot be obtained for a significant portion of the underlying assets.
Income Taxes	There are two components of income tax expense: current and deferred. Current income tax expense reflects taxes to be paid or refunded for the current period. Deferred income tax expense results from changes in deferred tax assets and liabilities between periods. These gross deferred tax assets and liabilities represent decreases or increases in taxes expected to be paid in the future because of future reversals of temporary differences in the bases of assets and liabilities as measured by tax laws and their bases as reported in the financial statements. Deferred tax assets are also recognized for tax attributes such as net operating loss carryforwards and tax credit carryforwards. Valuation allowances are recorded to reduce deferred tax assets to the amounts management concludes are more-likely-than-not to be realized. Income tax benefits are recognized and measured based upon a two-step model: first, a tax position must be more-likely-than-not to be sustained based solely on its technical merits in order to be recognized, and second, the benefit is measured as the largest dollar amount of that position that is more-likely-than-not to be sustained upon settlement. The difference between the benefit recognized and the tax benefit claimed on a tax return is referred to as an unrecognized tax benefit. The Corporation records income tax-related interest and penalties, if applicable, within income tax expense.
Revenue Recognition	Revenue is recorded when earned, which is generally over the period services are provided and no contingencies exist. The following summarizes the Corporation’s revenue recognition policies as they relate to certain noninterest income line items in the Consolidated Statement of Income. Card income includes fees such as interchange, cash advance, annual, late, over-limit and other miscellaneous fees. Uncollected fees are included in customer card receivables balances with an amount recorded in the allowance for loan and lease losses for estimated uncollectible card receivables. Uncollected fees are written off when a card receivable reaches 180 days past due. Service charges include fees for insufficient funds, overdrafts and other banking services. Uncollected fees are included in outstanding loan balances with an amount recorded for estimated uncollectible service fees receivable. Uncollected fees are written off when a fee receivable reaches 60 days past due. Investment and brokerage services revenue consists primarily of asset management fees and brokerage income. Asset management fees consist primarily of fees for investment management and trust services and are generally based on the dollar amount of the assets being managed. Brokerage income generally includes commissions and fees earned on the sale of various financial products. Investment banking income consists primarily of advisory and underwriting fees which are generally recognized net of any direct expenses. Non-reimbursed expenses are recorded as noninterest expense.
Earnings Per Common Share	Earnings per common share (EPS) is computed by dividing net income allocated to common shareholders by the weighted-average common shares outstanding, excluding unvested common shares subject to repurchase or cancellation. Net income allocated to common shareholders is net income adjusted for preferred stock dividends including dividends declared, accretion of discounts on preferred stock including accelerated accretion when preferred stock is repaid early, and cumulative dividends related to the current dividend period that have not been declared as of period end, less income allocated to participating securities (see below for more information). Diluted EPS is computed by dividing income allocated to common shareholders plus dividends on dilutive convertible preferred stock and preferred stock that can be tendered to exercise warrants, by the weighted-average common shares outstanding plus amounts representing the dilutive effect of stock options outstanding, restricted stock, restricted stock units (RSUs), outstanding warrants and the dilution resulting from the conversion of convertible preferred stock, if applicable.
Foreign Currency Translation	Assets, liabilities and operations of foreign branches and subsidiaries are recorded based on the functional currency of each entity. When the functional currency of a foreign operation is the local currency, the assets, liabilities and operations are translated, for consolidation purposes, from the local currency to the U.S. dollar reporting currency at period-end rates for assets and liabilities and generally at average rates for results of operations. The resulting unrealized gains and losses are reported as a component of accumulated OCI, net-of-tax. When the foreign entity’s functional currency is the U.S. dollar, the resulting remeasurement gains or losses on foreign currency-denominated assets or liabilities are included in earnings.
Credit Card and Deposit Arrangements	Endorsing Organization Agreements The Corporation contracts with other organizations to obtain their endorsement of the Corporation’s loan and deposit products. This endorsement may provide to the Corporation exclusive rights to market to the organization’s members or to customers on behalf of the Corporation. These organizations endorse the Corporation’s loan and deposit products and provide the Corporation with their mailing lists and marketing activities. These agreements generally have terms that range five or more years. The Corporation typically pays royalties in exchange for the endorsement. Compensation costs related to the credit card agreements are recorded as contra-revenue in card income. Cardholder Reward Agreements The Corporation offers reward programs that allow its cardholders to earn points that can be redeemed for a broad range of rewards including cash, travel and gift cards. The Corporation establishes a rewards liability based upon the points earned that are expected to be redeemed and the average cost per point redeemed. The points to be redeemed are estimated based on past redemption behavior, card product type, account transaction activity and other historical card performance. The liability is reduced as the points are redeemed. The estimated cost of the rewards programs is recorded as contra-revenue in card income.

Derivatives (Tables)

Derivatives (Tables)	12 Months Ended
	Dec. 31, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Instruments	The following tables present derivative instruments included on the Consolidated Balance Sheet in derivative assets and liabilities at December 31, 2017 and 2016 . Balances are presented on a gross basis, prior to the application of counterparty and cash collateral netting. Total derivative assets and liabilities are adjusted on an aggregate basis to take into consideration the effects of legally enforceable master netting agreements and have been reduced by the cash collateral received or paid. December 31, 2017 Gross Derivative Assets Gross Derivative Liabilities (Dollars in billions) Contract/ Notional (1) Trading and Other Risk Management Derivatives Qualifying Hedges Total Trading and Other Risk Management Derivatives Qualifying Hedges Total Interest rate contracts Swaps (2) $ 15,416.4 $ 175.1 $ 2.9 $ 178.0 $ 172.5 $ 1.7 $ 174.2 Futures and forwards (2) 4,332.4 0.5 — 0.5 0.5 — 0.5 Written options 1,170.5 — — — 35.5 — 35.5 Purchased options 1,184.5 37.6 — 37.6 — — — Foreign exchange contracts Swaps 2,011.1 35.6 2.2 37.8 36.1 2.7 38.8 Spot, futures and forwards 3,543.3 39.1 0.7 39.8 39.1 0.8 39.9 Written options 291.8 — — — 5.1 — 5.1 Purchased options 271.9 4.6 — 4.6 — — — Equity contracts Swaps 265.6 4.8 — 4.8 4.4 — 4.4 Futures and forwards 106.9 1.5 — 1.5 0.9 — 0.9 Written options 480.8 — — — 23.9 — 23.9 Purchased options 428.2 24.7 — 24.7 — — — Commodity contracts Swaps 46.1 1.8 — 1.8 4.6 — 4.6 Futures and forwards 47.1 3.5 — 3.5 0.6 — 0.6 Written options 21.7 — — — 1.4 — 1.4 Purchased options 22.9 1.4 — 1.4 — — — Credit derivatives (3) Purchased credit derivatives: Credit default swaps (2) 470.9 4.1 — 4.1 11.1 — 11.1 Total return swaps/options 54.1 0.1 — 0.1 1.3 — 1.3 Written credit derivatives: Credit default swaps (2) 448.2 10.6 — 10.6 3.6 — 3.6 Total return swaps/options 55.2 0.8 — 0.8 0.2 — 0.2 Gross derivative assets/liabilities $ 345.8 $ 5.8 $ 351.6 $ 340.8 $ 5.2 $ 346.0 Less: Legally enforceable master netting agreements (2) (279.2 ) (279.2 ) Less: Cash collateral received/paid (2) (34.6 ) (32.5 ) Total derivative assets/liabilities $ 37.8 $ 34.3 (1) Represents the total contract/notional amount of derivative assets and liabilities outstanding. (2) Derivative assets and liabilities reflect the effects of contractual amendments by two central clearing counterparties to legally re-characterize daily cash variation margin from collateral, which secures an outstanding exposure, to settlement, which discharges an outstanding exposure. One of these central clearing counterparties amended its governing documents, which became effective in January 2017. In addition, the Corporation elected to transfer its existing positions to the settlement platform for the other central clearing counterparty in September 2017. (3) The net derivative asset and notional amount of written credit derivatives for which the Corporation held purchased credit derivatives with identical underlying referenced names were $6.4 billion and $435.1 billion at December 31, 2017 . December 31, 2016 Gross Derivative Assets Gross Derivative Liabilities (Dollars in billions) Contract/ Notional (1) Trading and Other Risk Management Derivatives Qualifying Hedges Total Trading and Other Risk Management Derivatives Qualifying Hedges Total Interest rate contracts Swaps $ 16,977.7 $ 385.0 $ 5.9 $ 390.9 $ 386.9 $ 2.0 $ 388.9 Futures and forwards 5,609.5 2.2 — 2.2 2.1 — 2.1 Written options 1,146.2 — — — 52.2 — 52.2 Purchased options 1,178.7 53.3 — 53.3 — — — Foreign exchange contracts Swaps 1,828.6 54.6 4.2 58.8 58.8 6.2 65.0 Spot, futures and forwards 3,410.7 58.8 1.7 60.5 56.6 0.8 57.4 Written options 356.6 — — — 9.4 — 9.4 Purchased options 342.4 8.9 — 8.9 — — — Equity contracts Swaps 189.7 3.4 — 3.4 4.0 — 4.0 Futures and forwards 68.7 0.9 — 0.9 0.9 — 0.9 Written options 431.5 — — — 21.4 — 21.4 Purchased options 385.5 23.9 — 23.9 — — — Commodity contracts Swaps 48.2 2.5 — 2.5 5.1 — 5.1 Futures and forwards 49.1 3.6 — 3.6 0.5 — 0.5 Written options 29.3 — — — 1.9 — 1.9 Purchased options 28.9 2.0 — 2.0 — — — Credit derivatives (2) Purchased credit derivatives: Credit default swaps 604.0 8.1 — 8.1 10.3 — 10.3 Total return swaps/options 21.2 0.4 — 0.4 1.5 — 1.5 Written credit derivatives: Credit default swaps 614.4 10.7 — 10.7 7.5 — 7.5 Total return swaps/options 25.4 1.0 — 1.0 0.2 — 0.2 Gross derivative assets/liabilities $ 619.3 $ 11.8 $ 631.1 $ 619.3 $ 9.0 $ 628.3 Less: Legally enforceable master netting agreements (545.3 ) (545.3 ) Less: Cash collateral received/paid (43.3 ) (43.5 ) Total derivative assets/liabilities $ 42.5 $ 39.5 (1) Represents the total contract/notional amount of derivative assets and liabilities outstanding. (2) The net derivative asset and notional amount of written credit derivatives for which the Corporation held purchased credit derivatives with identical underlying referenced names were $2.2 billion and $548.9 billion at December 31, 2016 .
Derivative [Line Items]
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value	The following table summarizes information related to fair value hedges for 2017 , 2016 and 2015 , including hedges of interest rate risk on long-term debt that were acquired as part of a business combination and redesignated at that time. At redesignation, the fair value of the derivatives was positive. As the derivatives mature, the fair value will approach zero. As a result, ineffectiveness will occur and the fair value changes in the derivatives and the long-term debt being hedged may be directionally the same in certain scenarios. Based on a regression analysis, the derivatives continue to be highly effective at offsetting changes in the fair value of the long-term debt attributable to interest rate risk. Derivatives Designated as Fair Value Hedges Gains (Losses) Derivative Hedged Item Hedge Ineffectiveness (Dollars in millions) 2017 2016 2015 2017 2016 2015 2017 2016 2015 Interest rate risk on long-term debt (1) $ (1,537 ) $ (1,488 ) $ (718 ) $ 1,045 $ 646 $ (77 ) $ (492 ) $ (842 ) $ (795 ) Interest rate and foreign currency risk on long-term debt (1) 1,811 (941 ) (1,898 ) (1,767 ) 944 1,812 44 3 (86 ) Interest rate risk on available-for-sale securities (2) (67 ) 227 105 35 (286 ) (127 ) (32 ) (59 ) (22 ) Total $ 207 $ (2,202 ) $ (2,511 ) $ (687 ) $ 1,304 $ 1,608 $ (480 ) $ (898 ) $ (903 ) (1) Amounts are recorded in interest expense on long-term debt and in other income. (2) Amounts are recorded in interest income on debt securities.
Cash Flow and Net Investment Hedges	The table below summarizes certain information related to cash flow hedges and net investment hedges for 2017 , 2016 , and 2015 . Of the $831 million after-tax net loss ( $1.3 billion pre-tax) on derivatives in accumulated OCI at December 31, 2017 , $130 million after-tax ( $208 million pre-tax) is expected to be reclassified into earnings in the next 12 months. These net losses reclassified into earnings are expected to primarily reduce net interest income related to the respective hedged items. Amounts related to price risk on restricted stock awards reclassified from accumulated OCI are recorded in personnel expense. For terminated cash flow hedges, the time period over which the majority of the forecasted transactions are hedged is approximately seven years, with a maximum length of time for certain forecasted transactions of 19 years. Derivatives Designated as Cash Flow and Net Investment Hedges Gains (Losses) Recognized in Accumulated OCI on Derivatives Gains (Losses) in Income (Dollars in millions, amounts pre-tax) 2017 2016 2015 2017 2016 2015 Cash flow hedges Interest rate risk on variable-rate portfolios $ (109 ) $ (340 ) $ 95 $ (327 ) $ (553 ) $ (974 ) Price risk on certain restricted stock awards (1) 59 41 (40 ) 148 (32 ) 91 Total (2) $ (50 ) $ (299 ) $ 55 $ (179 ) $ (585 ) $ (883 ) Net investment hedges Foreign exchange risk (3) $ (1,588 ) $ 1,636 $ 3,010 $ 1,782 $ 3 $ 153 (1) Gains (losses) recognized in accumulated OCI are primarily related to the change in the Corporation’s stock price for the period. (2) In 2017 , 2016 and 2015 , amounts representing hedge ineffectiveness were not significant. (3) In 2017 , substantially all of the gains in income reclassified from accumulated OCI were comprised of the gain recognized on derivatives used to hedge the currency risk of the Corporation’s net investment in its non-U.S. consumer credit card business, which was sold in 2017. For more information, see Note 14 – Accumulated Other Comprehensive Income (Loss) . In 2017 , 2016 and 2015 , amounts excluded from effectiveness testing in total were $120 million , $325 million and $298 million
Other Risk Management Derivatives	The table below presents gains (losses) on these derivatives for 2017 , 2016 and 2015 . These gains (losses) are largely offset by the income or expense that is recorded on the hedged item. Other Risk Management Derivatives Gains (Losses) (Dollars in millions) 2017 2016 2015 Interest rate risk on mortgage banking income (1) $ 8 $ 461 $ 254 Credit risk on loans (2) (6 ) (107 ) (22 ) Interest rate and foreign currency risk on ALM activities (3) (36 ) (754 ) (222 ) Price risk on certain restricted stock awards (4) 301 9 (267 ) (1) Net gains (losses) on these derivatives are recorded in mortgage banking income as they are used to mitigate the interest rate risk related to MSRs, IRLCs and mortgage LHFS, all of which are measured at fair value with changes in fair value recorded in mortgage banking income. The fair value of IRLCs is derived from the fair value of related mortgage loans which is based on observable market data and includes the expected net future cash flows related to servicing of the loans. The net gains on IRLCs related to the origination of mortgage loans that are held-for-sale, which are not included in the table but are considered derivative instruments, were $ 220 million , $533 million and $714 million for 2017 , 2016 and 2015 , respectively. (2) Primarily related to derivatives that are economic hedges of credit risk on loans. Net gains (losses) on these derivatives are recorded in other income. (3) Primarily related to hedges of debt securities carried at fair value and hedges of foreign currency-denominated debt. Gains (losses) on these derivatives and the related hedged items are recorded in other income. (4) Gains (losses) on these derivatives are recorded in personnel expense.
Schedule of Derivative Instruments Included in Trading Activities	The table below, which includes both derivatives and non-derivative cash instruments, identifies the amounts in the respective income statement line items attributable to the Corporation’s sales and trading revenue in Global Markets , categorized by primary risk, for 2017 , 2016 and 2015 . The difference between total trading account profits in the following table and in the Consolidated Statement of Income represents trading activities in business segments other than Global Markets . This table includes DVA and funding valuation adjustment (FVA) gains (losses). Global Markets results in Note 23 – Business Segment Information are presented on a fully taxable-equivalent (FTE) basis. The following table is not presented on an FTE basis. Sales and Trading Revenue Trading Account Profits Net Interest Income Other (1) Total (Dollars in millions) 2017 Interest rate risk $ 1,145 $ 980 $ 417 $ 2,542 Foreign exchange risk 1,417 (1 ) (162 ) 1,254 Equity risk 2,689 (525 ) 1,904 4,068 Credit risk 1,251 2,537 577 4,365 Other risk 204 33 75 312 Total sales and trading revenue $ 6,706 $ 3,024 $ 2,811 $ 12,541 2016 Interest rate risk $ 1,613 $ 1,410 $ 304 $ 3,327 Foreign exchange risk 1,360 (10 ) (154 ) 1,196 Equity risk 1,917 20 2,074 4,011 Credit risk 1,250 2,569 424 4,243 Other risk 407 (20 ) 40 427 Total sales and trading revenue $ 6,547 $ 3,969 $ 2,688 $ 13,204 2015 Interest rate risk $ 1,290 $ 1,333 $ (259 ) $ 2,364 Foreign exchange risk 1,322 (10 ) (117 ) 1,195 Equity risk 2,115 56 2,152 4,323 Credit risk 920 2,333 445 3,698 Other risk 459 (81 ) 62 440 Total sales and trading revenue $ 6,106 $ 3,631 $ 2,283 $ 12,020 (1) Represents amounts in investment and brokerage services and other income that are recorded in Global Markets and included in the definition of sales and trading revenue. Includes investment and brokerage services revenue of $ 2.0 billion , $2.1 billion , and $2.2 billion for 2017 , 2016 , and 2015 , respectively
Disclosure of Credit Derivatives	Credit derivative instruments where the Corporation is the seller of credit protection and their expiration at December 31, 2017 and 2016 are summarized in the following table. Credit Derivative Instruments Less than One Year One to Three Years Three to Five Years Over Five Years Total December 31, 2017 (Dollars in millions) Carrying Value Credit default swaps: Investment grade $ 4 $ 3 $ 61 $ 245 $ 313 Non-investment grade 203 453 484 2,133 3,273 Total 207 456 545 2,378 3,586 Total return swaps/options: Investment grade 30 — — — 30 Non-investment grade 150 — — 3 153 Total 180 — — 3 183 Total credit derivatives $ 387 $ 456 $ 545 $ 2,381 $ 3,769 Credit-related notes: Investment grade $ — $ — $ 7 $ 689 $ 696 Non-investment grade 12 4 34 1,548 1,598 Total credit-related notes $ 12 $ 4 $ 41 $ 2,237 $ 2,294 Maximum Payout/Notional Credit default swaps: Investment grade $ 61,388 $ 115,480 $ 107,081 $ 21,579 $ 305,528 Non-investment grade 39,312 49,843 39,098 14,420 142,673 Total 100,700 165,323 146,179 35,999 448,201 Total return swaps/options: Investment grade 37,394 2,581 — 143 40,118 Non-investment grade 13,751 514 143 697 15,105 Total 51,145 3,095 143 840 55,223 Total credit derivatives $ 151,845 $ 168,418 $ 146,322 $ 36,839 $ 503,424 December 31, 2016 Carrying Value Credit default swaps: Investment grade $ 10 $ 64 $ 535 $ 783 $ 1,392 Non-investment grade 771 1,053 908 3,339 6,071 Total 781 1,117 1,443 4,122 7,463 Total return swaps/options: Investment grade 16 — — — 16 Non-investment grade 127 10 2 1 140 Total 143 10 2 1 156 Total credit derivatives $ 924 $ 1,127 $ 1,445 $ 4,123 $ 7,619 Credit-related notes: Investment grade $ — $ 12 $ 542 $ 1,423 $ 1,977 Non-investment grade 70 22 60 1,318 1,470 Total credit-related notes $ 70 $ 34 $ 602 $ 2,741 $ 3,447 Maximum Payout/Notional Credit default swaps: Investment grade $ 121,083 $ 143,200 $ 116,540 $ 21,905 $ 402,728 Non-investment grade 84,755 67,160 41,001 18,711 211,627 Total 205,838 210,360 157,541 40,616 614,355 Total return swaps/options: Investment grade 12,792 — — — 12,792 Non-investment grade 6,638 5,127 589 208 12,562 Total 19,430 5,127 589 208 25,354 Total credit derivatives $ 225,268 $ 215,487 $ 158,130 $ 40,824 $ 639,709
Additional Collateral Required to be Posted Upon Downgrade	The following table presents the amount of additional collateral that would have been contractually required by derivative contracts and other trading agreements at December 31, 2017 if the rating agencies had downgraded their long-term senior debt ratings for the Corporation or certain subsidiaries by one incremental notch and by an additional second incremental notch. Additional Collateral Required to be Posted Upon Downgrade at December 31, 2017 (Dollars in millions) One incremental notch Second incremental notch Bank of America Corporation $ 779 $ 487 Bank of America, N.A. and subsidiaries (1) 391 230 (1) Included in Bank of America Corporation collateral requirements in this table.
Derivative Liability Subject to Unilateral Termination Upon Downgrade	The table below presents the derivative liabilities that would be subject to unilateral termination by counterparties and the amounts of collateral that would have been contractually required at December 31, 2017 if the long-term senior debt ratings for the Corporation or certain subsidiaries had been lower by one incremental notch and by an additional second incremental notch. Derivative Liabilities Subject to Unilateral Termination Upon Downgrade at December 31, 2017 (Dollars in millions) One incremental notch Second incremental notch Derivative liabilities $ 428 $ 1,163 Collateral posted 339 800
Valuation Adjustments on Derivatives	The table below presents CVA, DVA and FVA gains (losses) on derivatives, which are recorded in trading account profits, on a gross and net of hedge basis for 2017 , 2016 and 2015 . CVA gains reduce the cumulative CVA thereby increasing the derivative assets balance. DVA gains increase the cumulative DVA thereby decreasing the derivative liabilities balance. CVA and DVA losses have the opposite impact. FVA gains related to derivative assets reduce the cumulative FVA thereby increasing the derivative assets balance. FVA gains related to derivative liabilities increase the cumulative FVA thereby decreasing the derivative liabilities balance. FVA losses have the opposite impact. Valuation Adjustments on Derivatives (1) Gains (Losses) Gross Net Gross Net Gross Net (Dollars in millions) 2017 2016 2015 Derivative assets (CVA) $ 330 $ 98 $ 374 $ 214 $ 255 $ 227 Derivative assets/liabilities (FVA) 160 178 186 102 16 16 Derivative liabilities (DVA) (324 ) (281 ) 24 (141 ) (18 ) (153 ) (1) At December 31, 2017 , 2016 and 2015 , cumulative CVA reduced the derivative assets balance by $677 million , $1.0 billion and $1.4 billion , cumulative FVA reduced the net derivatives balance by $136 million , $296 million and $481 million , and cumulative DVA reduced the derivative liabilities balance by $450 million , $774 million and $750 million , respectively.
Derivative
Derivative [Line Items]
Offsetting Assets	The following table presents derivative instruments included in derivative assets and liabilities on the Consolidated Balance Sheet at December 31, 2017 and 2016 by primary risk (e.g., interest rate risk) and the platform, where applicable, on which these derivatives are transacted. Balances are presented on a gross basis, prior to the application of counterparty and cash collateral netting. Total gross derivative assets and liabilities are adjusted on an aggregate basis to take into consideration the effects of legally enforceable master netting agreements which includes reducing the balance for counterparty netting and cash collateral received or paid. For more information on offsetting of securities financing agreements, see Note 10 – Federal Funds Sold or Purchased, Securities Financing Agreements and Short-term Borrowings . Offsetting of Derivatives (1) Derivative Assets Derivative Liabilities Derivative Assets Derivative Liabilities (Dollars in billions) December 31, 2017 December 31, 2016 Interest rate contracts Over-the-counter $ 211.7 $ 206.0 $ 267.3 $ 258.2 Over-the-counter cleared (2) 1.9 1.8 177.2 182.8 Foreign exchange contracts Over-the-counter 78.7 80.8 124.3 126.7 Over-the-counter cleared 0.9 0.7 0.3 0.3 Equity contracts Over-the-counter 18.3 16.2 15.6 13.7 Exchange-traded 9.1 8.5 11.4 10.8 Commodity contracts Over-the-counter 2.9 4.4 3.7 4.9 Exchange-traded 0.7 0.8 1.1 1.0 Credit derivatives Over-the-counter 9.1 9.6 15.3 14.7 Over-the-counter cleared (2) 6.1 6.0 4.3 4.3 Total gross derivative assets/liabilities, before netting Over-the-counter 320.7 317.0 426.2 418.2 Exchange-traded 9.8 9.3 12.5 11.8 Over-the-counter cleared (2) 8.9 8.5 181.8 187.4 Less: Legally enforceable master netting agreements and cash collateral received/paid Over-the-counter (296.9 ) (294.6 ) (398.2 ) (392.6 ) Exchange-traded (8.6 ) (8.6 ) (8.9 ) (8.9 ) Over-the-counter cleared (2) (8.3 ) (8.5 ) (181.5 ) (187.3 ) Derivative assets/liabilities, after netting 25.6 23.1 31.9 28.6 Other gross derivative assets/liabilities (3) 12.2 11.2 10.6 10.9 Total derivative assets/liabilities 37.8 34.3 42.5 39.5 Less: Financial instruments collateral (4) (11.2 ) (10.4 ) (13.5 ) (10.5 ) Total net derivative assets/liabilities $ 26.6 $ 23.9 $ 29.0 $ 29.0 (1) OTC derivatives include bilateral transactions between the Corporation and a particular counterparty. OTC-cleared derivatives include bilateral transactions between the Corporation and a counterparty where the transaction is cleared through a clearinghouse, and exchange-traded derivatives include listed options transacted on an exchange. (2) Derivative assets and liabilities reflect the effects of contractual amendments by two central clearing counterparties to legally re-characterize daily cash variation margin from collateral, which secures an outstanding exposure, to settlement, which discharges an outstanding exposure. One of these central clearing counterparties amended its governing documents, which became effective in January 2017. In addition, the Corporation elected to transfer its existing positions to the settlement platform for the other central clearing counterparty in September 2017. (3) Consists of derivatives entered into under master netting agreements where the enforceability of these agreements is uncertain under bankruptcy laws in some countries or industries. (4) Amounts are limited to the derivative asset/liability balance and, accordingly, do not include excess collateral received/pledged. Financial instruments collateral includes securities collateral received or pledged and cash securities held and posted at third-party custodians that are not offset on the Consolidated Balance Sheet but shown as a reduction to derive net derivative assets and liabilities.
Offsetting Liabilities	The following table presents derivative instruments included in derivative assets and liabilities on the Consolidated Balance Sheet at December 31, 2017 and 2016 by primary risk (e.g., interest rate risk) and the platform, where applicable, on which these derivatives are transacted. Balances are presented on a gross basis, prior to the application of counterparty and cash collateral netting. Total gross derivative assets and liabilities are adjusted on an aggregate basis to take into consideration the effects of legally enforceable master netting agreements which includes reducing the balance for counterparty netting and cash collateral received or paid. For more information on offsetting of securities financing agreements, see Note 10 – Federal Funds Sold or Purchased, Securities Financing Agreements and Short-term Borrowings . Offsetting of Derivatives (1) Derivative Assets Derivative Liabilities Derivative Assets Derivative Liabilities (Dollars in billions) December 31, 2017 December 31, 2016 Interest rate contracts Over-the-counter $ 211.7 $ 206.0 $ 267.3 $ 258.2 Over-the-counter cleared (2) 1.9 1.8 177.2 182.8 Foreign exchange contracts Over-the-counter 78.7 80.8 124.3 126.7 Over-the-counter cleared 0.9 0.7 0.3 0.3 Equity contracts Over-the-counter 18.3 16.2 15.6 13.7 Exchange-traded 9.1 8.5 11.4 10.8 Commodity contracts Over-the-counter 2.9 4.4 3.7 4.9 Exchange-traded 0.7 0.8 1.1 1.0 Credit derivatives Over-the-counter 9.1 9.6 15.3 14.7 Over-the-counter cleared (2) 6.1 6.0 4.3 4.3 Total gross derivative assets/liabilities, before netting Over-the-counter 320.7 317.0 426.2 418.2 Exchange-traded 9.8 9.3 12.5 11.8 Over-the-counter cleared (2) 8.9 8.5 181.8 187.4 Less: Legally enforceable master netting agreements and cash collateral received/paid Over-the-counter (296.9 ) (294.6 ) (398.2 ) (392.6 ) Exchange-traded (8.6 ) (8.6 ) (8.9 ) (8.9 ) Over-the-counter cleared (2) (8.3 ) (8.5 ) (181.5 ) (187.3 ) Derivative assets/liabilities, after netting 25.6 23.1 31.9 28.6 Other gross derivative assets/liabilities (3) 12.2 11.2 10.6 10.9 Total derivative assets/liabilities 37.8 34.3 42.5 39.5 Less: Financial instruments collateral (4) (11.2 ) (10.4 ) (13.5 ) (10.5 ) Total net derivative assets/liabilities $ 26.6 $ 23.9 $ 29.0 $ 29.0 (1) OTC derivatives include bilateral transactions between the Corporation and a particular counterparty. OTC-cleared derivatives include bilateral transactions between the Corporation and a counterparty where the transaction is cleared through a clearinghouse, and exchange-traded derivatives include listed options transacted on an exchange. (2) Derivative assets and liabilities reflect the effects of contractual amendments by two central clearing counterparties to legally re-characterize daily cash variation margin from collateral, which secures an outstanding exposure, to settlement, which discharges an outstanding exposure. One of these central clearing counterparties amended its governing documents, which became effective in January 2017. In addition, the Corporation elected to transfer its existing positions to the settlement platform for the other central clearing counterparty in September 2017. (3) Consists of derivatives entered into under master netting agreements where the enforceability of these agreements is uncertain under bankruptcy laws in some countries or industries. (4) Amounts are limited to the derivative asset/liability balance and, accordingly, do not include excess collateral received/pledged. Financial instruments collateral includes securities collateral received or pledged and cash securities held and posted at third-party custodians that are not offset on the Consolidated Balance Sheet but shown as a reduction to derive net derivative assets and liabilities.

Securities (Tables)

Securities (Tables)	12 Months Ended
	Dec. 31, 2017
Investments, Debt and Equity Securities [Abstract]
Marketable Securities	The table below presents the amortized cost, gross unrealized gains and losses, and fair value of AFS debt securities, other debt securities carried at fair value, HTM debt securities and AFS marketable equity securities at December 31, 2017 and 2016 . Debt Securities and Available-for-Sale Marketable Equity Securities Amortized Cost Gross Gains Gross Losses Fair Value (Dollars in millions) December 31, 2017 Available-for-sale debt securities Mortgage-backed securities: Agency $ 194,119 $ 506 $ (1,696 ) $ 192,929 Agency-collateralized mortgage obligations 6,846 39 (81 ) 6,804 Commercial 13,864 28 (208 ) 13,684 Non-agency residential (1) 2,410 267 (8 ) 2,669 Total mortgage-backed securities 217,239 840 (1,993 ) 216,086 U.S. Treasury and agency securities 54,523 18 (1,018 ) 53,523 Non-U.S. securities 6,669 9 (1 ) 6,677 Other taxable securities, substantially all asset-backed securities 5,699 73 (2 ) 5,770 Total taxable securities 284,130 940 (3,014 ) 282,056 Tax-exempt securities 20,541 138 (104 ) 20,575 Total available-for-sale debt securities 304,671 1,078 (3,118 ) 302,631 Other debt securities carried at fair value 12,273 252 (39 ) 12,486 Total debt securities carried at fair value 316,944 1,330 (3,157 ) 315,117 Held-to-maturity debt securities, substantially all U.S. agency mortgage-backed securities 125,013 111 (1,825 ) 123,299 Total debt securities (2) $ 441,957 $ 1,441 $ (4,982 ) $ 438,416 Available-for-sale marketable equity securities (3) $ 27 $ — $ (2 ) $ 25 December 31, 2016 Available-for-sale debt securities Mortgage-backed securities: Agency $ 190,809 $ 640 $ (1,963 ) $ 189,486 Agency-collateralized mortgage obligations 8,296 85 (51 ) 8,330 Commercial 12,594 21 (293 ) 12,322 Non-agency residential (1) 1,863 181 (31 ) 2,013 Total mortgage-backed securities 213,562 927 (2,338 ) 212,151 U.S. Treasury and agency securities 48,800 204 (752 ) 48,252 Non-U.S. securities 6,372 13 (3 ) 6,382 Other taxable securities, substantially all asset-backed securities 10,573 64 (23 ) 10,614 Total taxable securities 279,307 1,208 (3,116 ) 277,399 Tax-exempt securities 17,272 72 (184 ) 17,160 Total available-for-sale debt securities 296,579 1,280 (3,300 ) 294,559 Less: Available-for-sale securities of business held for sale (4) (619 ) — — (619 ) Other debt securities carried at fair value 19,748 121 (149 ) 19,720 Total debt securities carried at fair value 315,708 1,401 (3,449 ) 313,660 Held-to-maturity debt securities, substantially all U.S. agency mortgage-backed securities 117,071 248 (2,034 ) 115,285 Total debt securities (2) $ 432,779 $ 1,649 $ (5,483 ) $ 428,945 Available-for-sale marketable equity securities (3) $ 325 $ 51 $ (1 ) $ 375 (1) At December 31, 2017 and 2016 , the underlying collateral type included approximately 62 percent and 60 percent prime, 13 percent and 19 percent Alt-A, and 25 percent and 21 percent subprime. (2) The Corporation had debt securities from FNMA and FHLMC that each exceeded 10 percent of shareholders’ equity, with an amortized cost of $163.6 billion and $50.3 billion , and a fair value of $162.1 billion and $50.0 billion at December 31, 2017 , and an amortized cost of $156.4 billion and $48.7 billion , and a fair value of $154.4 billion and $48.3 billion at December 31, 2016 . (3) Classified in other assets on the Consolidated Balance Sheet. (4) Represents AFS debt securities of business held for sale. In 2017, the Corporation sold its non-U.S. consumer credit card business.
Schedule of Other Debt Securities Carried at Fair Value	The following table presents the components of other debt securities carried at fair value where the changes in fair value are reported in other income. In 2017 , the Corporation recorded unrealized mark-to-market net gains of $243 million and realized net losses of $49 million compared to unrealized mark-to-market net gains of $51 million and realized net losses of $128 million in 2016 . These amounts exclude hedge results. Other Debt Securities Carried at Fair Value December 31 (Dollars in millions) 2017 2016 Mortgage-backed securities: Agency-collateralized mortgage obligations $ 5 $ 5 Non-agency residential 2,764 3,139 Total mortgage-backed securities 2,769 3,144 Non-U.S. securities (1) 9,488 16,336 Other taxable securities, substantially all asset-backed securities 229 240 Total $ 12,486 $ 19,720 (1) These securities are primarily used to satisfy certain international regulatory liquidity requirements.
Components of Realized Gains and Losses on Sales of Debt Securities	The gross realized gains and losses on sales of AFS debt securities for 2017 , 2016 and 2015 are presented in the table below. Gains and Losses on Sales of AFS Debt Securities (Dollars in millions) 2017 2016 2015 Gross gains $ 352 $ 520 $ 1,174 Gross losses (97 ) (30 ) (36 ) Net gains on sales of AFS debt securities $ 255 $ 490 $ 1,138 Income tax expense attributable to realized net gains on sales of AFS debt securities $ 97 $ 186 $ 432
Amortized Cost and Fair Value of Corporations Investment	The table below presents the fair value and the associated gross unrealized losses on AFS debt securities and whether these securities have had gross unrealized losses for less than 12 months or for 12 months or longer at December 31, 2017 and 2016 . Temporarily Impaired and Other-than-temporarily Impaired AFS Debt Securities Less than Twelve Months Twelve Months or Longer Total Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses (Dollars in millions) December 31, 2017 Temporarily impaired AFS debt securities Mortgage-backed securities: Agency $ 73,535 $ (352 ) $ 72,612 $ (1,344 ) $ 146,147 $ (1,696 ) Agency-collateralized mortgage obligations 2,743 (29 ) 1,684 (52 ) 4,427 (81 ) Commercial 5,575 (50 ) 4,586 (158 ) 10,161 (208 ) Non-agency residential 335 (7 ) — — 335 (7 ) Total mortgage-backed securities 82,188 (438 ) 78,882 (1,554 ) 161,070 (1,992 ) U.S. Treasury and agency securities 27,537 (251 ) 24,035 (767 ) 51,572 (1,018 ) Non-U.S. securities 772 (1 ) — — 772 (1 ) Other taxable securities, substantially all asset-backed securities — — 92 (2 ) 92 (2 ) Total taxable securities 110,497 (690 ) 103,009 (2,323 ) 213,506 (3,013 ) Tax-exempt securities 1,090 (2 ) 7,100 (102 ) 8,190 (104 ) Total temporarily impaired AFS debt securities 111,587 (692 ) 110,109 (2,425 ) 221,696 (3,117 ) Other-than-temporarily impaired AFS debt securities (1) Non-agency residential mortgage-backed securities 58 (1 ) — — 58 (1 ) Total temporarily impaired and other-than-temporarily impaired AFS debt securities $ 111,645 $ (693 ) $ 110,109 $ (2,425 ) $ 221,754 $ (3,118 ) December 31, 2016 Temporarily impaired AFS debt securities Mortgage-backed securities: Agency $ 135,210 $ (1,846 ) $ 3,770 $ (117 ) $ 138,980 $ (1,963 ) Agency-collateralized mortgage obligations 3,229 (25 ) 1,028 (26 ) 4,257 (51 ) Commercial 9,018 (293 ) — — 9,018 (293 ) Non-agency residential 212 (1 ) 204 (13 ) 416 (14 ) Total mortgage-backed securities 147,669 (2,165 ) 5,002 (156 ) 152,671 (2,321 ) U.S. Treasury and agency securities 28,462 (752 ) — — 28,462 (752 ) Non-U.S. securities 52 (1 ) 142 (2 ) 194 (3 ) Other taxable securities, substantially all asset-backed securities 762 (5 ) 1,438 (18 ) 2,200 (23 ) Total taxable securities 176,945 (2,923 ) 6,582 (176 ) 183,527 (3,099 ) Tax-exempt securities 4,782 (148 ) 1,873 (36 ) 6,655 (184 ) Total temporarily impaired AFS debt securities 181,727 (3,071 ) 8,455 (212 ) 190,182 (3,283 ) Other-than-temporarily impaired AFS debt securities (1) Non-agency residential mortgage-backed securities 94 (1 ) 401 (16 ) 495 (17 ) Total temporarily impaired and other-than-temporarily impaired AFS debt securities $ 181,821 $ (3,072 ) $ 8,856 $ (228 ) $ 190,677 $ (3,300 ) (1) Includes OTTI AFS debt securities on which an OTTI loss, primarily related to changes in interest rates, remains in accumulated OCI.
Significant Assumptions Used in the Valuation of Non-Agency Residential MBS	Significant assumptions used in estimating the expected cash flows for measuring credit losses on non-agency residential mortgage-backed securities (RMBS) were as follows at December 31, 2017 . Significant Assumptions Range (1) Weighted- 10th Percentile (2) 90th Percentile (2) Prepayment speed 12.4 % 3.0 % 21.3 % Loss severity 20.2 9.1 36.7 Life default rate 20.9 1.2 76.6 (1) Represents the range of inputs/assumptions based upon the underlying collateral. (2) The value of a variable below which the indicated percentile of observations will fall.
Expected Maturity Distribution	The remaining contractual maturity distribution and yields of the Corporation’s debt securities carried at fair value and HTM debt securities at December 31, 2017 are summarized in the table below. Actual duration and yields may differ as prepayments on the loans underlying the mortgages or other ABS are passed through to the Corporation. Maturities of Debt Securities Carried at Fair Value and Held-to-maturity Debt Securities Due in One Year or Less Due after One Year through Five Years Due after Five Years through Ten Years Due after Ten Years Total Amount Yield (1) Amount Yield (1) Amount Yield (1) Amount Yield (1) Amount Yield (1) (Dollars in millions) December 31, 2017 Amortized cost of debt securities carried at fair value Mortgage-backed securities: Agency $ 5 4.20 % $ 28 3.69 % $ 555 2.57 % $ 193,531 3.22 % $ 194,119 3.22 % Agency-collateralized mortgage obligations — — — — 33 2.52 6,817 3.18 6,850 3.18 Commercial 54 7.45 974 1.98 11,866 2.43 970 2.78 13,864 2.44 Non-agency residential — — — — 24 0.01 4,955 9.32 4,979 9.28 Total mortgage-backed securities 59 7.18 1,002 2.03 12,478 2.43 206,273 3.36 219,812 3.31 U.S. Treasury and agency securities 490 0.39 23,395 1.42 30,615 2.03 23 2.52 54,523 1.75 Non-U.S. securities 13,832 1.02 2,111 0.97 48 0.72 167 6.60 16,158 1.07 Other taxable securities, substantially all asset-backed securities 1,979 2.53 2,029 3.02 1,151 3.22 751 4.74 5,910 3.11 Total taxable securities 16,360 1.21 28,537 1.52 44,292 2.17 207,214 3.37 296,403 2.89 Tax-exempt securities 1,327 1.81 6,927 1.88 9,132 1.79 3,155 1.84 20,541 1.83 Total amortized cost of debt securities carried at fair value $ 17,687 1.25 $ 35,464 1.59 $ 53,424 2.11 $ 210,369 3.35 $ 316,944 2.82 Amortized cost of HTM debt securities (2) $ 1 5.82 $ 71 3.06 $ 1,144 2.65 $ 123,797 3.03 $ 125,013 3.03 Debt securities carried at fair value Mortgage-backed securities: Agency $ 5 $ 28 $ 555 $ 192,341 $ 192,929 Agency-collateralized mortgage obligations — — 32 6,777 6,809 Commercial 54 969 11,703 958 13,684 Non-agency residential — — 33 5,400 5,433 Total mortgage-backed securities 59 997 12,323 205,476 218,855 U.S. Treasury and agency securities 491 22,898 30,111 23 53,523 Non-U.S. securities 13,830 2,115 48 172 16,165 Other taxable securities, substantially all asset-backed securities 1,981 2,006 1,184 828 5,999 Total taxable securities 16,361 28,016 43,666 206,499 294,542 Tax-exempt securities 1,326 6,934 9,162 3,153 20,575 Total debt securities carried at fair value $ 17,687 $ 34,950 $ 52,828 $ 209,652 $ 315,117 Fair value of HTM debt securities (2) $ 1 $ 71 $ 1,117 $ 122,110 $ 123,299 (1) The average yield is computed based on a constant effective interest rate over the contractual life of each security. The average yield considers the contractual coupon and the amortization of premiums and accretion of discounts, excluding the effect of related hedging derivatives. (2) Substantially all U.S. agency MBS.

Outstanding Loans and Leases (T

Outstanding Loans and Leases (Tables)	12 Months Ended
	Dec. 31, 2017
Receivables [Abstract]
Schedule of Loans and Leases Outstanding	The following tables present total outstanding loans and leases and an aging analysis for the Consumer Real Estate, Credit Card and Other Consumer, and Commercial portfolio segments, by class of financing receivables, at December 31, 2017 and 2016 . In 2017, the Corporation sold its non-U.S. consumer credit card business. This business, which at December 31, 2016 included $9.2 billion of non-U.S. credit card loans and the related allowance for loan and lease losses of $243 million , was presented in assets of business held for sale on the Consolidated Balance Sheet. In this Note, all applicable amounts for December 31, 2016 include these balances, unless otherwise noted. For more information, see Note 1 – Summary of Significant Accounting Principles . 30-59 Days Past Due (1) 60-89 Days Past Due (1) 90 Days or Past Due (2) Total Past or More Total Current or Less Than 30 Days Past Due (3) Purchased (4) Loans Accounted for Under the Fair Value Option Total Outstandings (Dollars in millions) December 31, 2017 Consumer real estate Core portfolio Residential mortgage $ 1,242 $ 321 $ 1,040 $ 2,603 $ 174,015 $ 176,618 Home equity 215 108 473 796 43,449 44,245 Non-core portfolio Residential mortgage (5) 1,028 468 3,535 5,031 14,161 $ 8,001 27,193 Home equity 224 121 572 917 9,866 2,716 13,499 Credit card and other consumer U.S. credit card 542 405 900 1,847 94,438 96,285 Direct/Indirect consumer (6) 320 102 43 465 93,365 93,830 Other consumer (7) 10 2 1 13 2,665 2,678 Total consumer 3,581 1,527 6,564 11,672 431,959 10,717 454,348 Consumer loans accounted for under the fair value option (8) $ 928 928 Total consumer loans and leases 3,581 1,527 6,564 11,672 431,959 10,717 928 455,276 Commercial U.S. commercial 547 244 425 1,216 283,620 284,836 Non-U.S. commercial 52 1 3 56 97,736 97,792 Commercial real estate (9) 48 10 29 87 58,211 58,298 Commercial lease financing 110 68 26 204 21,912 22,116 U.S. small business commercial 95 45 88 228 13,421 13,649 Total commercial 852 368 571 1,791 474,900 476,691 Commercial loans accounted for under the fair value option (8) 4,782 4,782 Total commercial loans and leases 852 368 571 1,791 474,900 4,782 481,473 Total loans and leases (10) $ 4,433 $ 1,895 $ 7,135 $ 13,463 $ 906,859 $ 10,717 $ 5,710 $ 936,749 Percentage of outstandings 0.48 % 0.20 % 0.76 % 1.44 % 96.81 % 1.14 % 0.61 % 100.00 % (1) Consumer real estate loans 30-59 days past due includes fully-insured loans of $850 million and nonperforming loans of $253 million . Consumer real estate loans 60-89 days past due includes fully-insured loans of $386 million and nonperforming loans of $195 million . (2) Consumer real estate includes fully-insured loans of $3.2 billion . (3) Consumer real estate includes $2.3 billion and direct/indirect consumer includes $43 million of nonperforming loans. (4) PCI loan amounts are shown gross of the valuation allowance. (5) Total outstandings includes pay option loans of $1.4 billion . The Corporation no longer originates this product. (6) Total outstandings includes auto and specialty lending loans of $49.9 billion , unsecured consumer lending loans of $469 million , U.S. securities-based lending loans of $39.8 billion , non-U.S. consumer loans of $3.0 billion and other consumer loans of $684 million . (7) Total outstandings includes consumer leases of $2.5 billion and consumer overdrafts of $163 million . (8) Consumer loans accounted for under the fair value option includes residential mortgage loans of $567 million and home equity loans of $361 million . Commercial loans accounted for under the fair value option includes U.S. commercial loans of $2.6 billion and non-U.S. commercial loans of $2.2 billion . For more information, see Note 20 – Fair Value Measurements and Note 21 – Fair Value Option . (9) Total outstandings includes U.S. commercial real estate loans of $54.8 billion and non-U.S. commercial real estate loans of $3.5 billion . (10) The Corporation pledged $160.3 billion of loans to secure potential borrowing capacity with the Federal Reserve Bank and Federal Home Loan Bank (FHLB). This amount is not included in the parenthetical disclosure of loans and leases pledged as collateral on the Consolidated Balance Sheet as there were no related outstanding borrowings. 30-59 Days (1) 60-89 Days Past Due (1) 90 Days or (2) Total Past Total Current or Less Than 30 Days Past Due (3) Purchased (4) Loans Accounted for Under the Fair Value Option Total Outstandings (Dollars in millions) December 31, 2016 Consumer real estate Core portfolio Residential mortgage $ 1,340 $ 425 $ 1,213 $ 2,978 $ 153,519 $ 156,497 Home equity 239 105 451 795 48,578 49,373 Non-core portfolio Residential mortgage (5) 1,338 674 5,343 7,355 17,818 $ 10,127 35,300 Home equity 260 136 832 1,228 12,231 3,611 17,070 Credit card and other consumer U.S. credit card 472 341 782 1,595 90,683 92,278 Non-U.S. credit card 37 27 66 130 9,084 9,214 Direct/Indirect consumer (6) 272 79 34 385 93,704 94,089 Other consumer (7) 26 8 6 40 2,459 2,499 Total consumer 3,984 1,795 8,727 14,506 428,076 13,738 456,320 Consumer loans accounted for under the fair value option (8) $ 1,051 1,051 Total consumer loans and leases 3,984 1,795 8,727 14,506 428,076 13,738 1,051 457,371 Commercial U.S. commercial 952 263 400 1,615 268,757 270,372 Non-U.S. commercial 348 4 5 357 89,040 89,397 Commercial real estate (9) 20 10 56 86 57,269 57,355 Commercial lease financing 167 21 27 215 22,160 22,375 U.S. small business commercial 96 49 84 229 12,764 12,993 Total commercial 1,583 347 572 2,502 449,990 452,492 Commercial loans accounted for under the fair value option (8) 6,034 6,034 Total commercial loans and leases 1,583 347 572 2,502 449,990 6,034 458,526 Total consumer and commercial loans and leases (10) $ 5,567 $ 2,142 $ 9,299 $ 17,008 $ 878,066 $ 13,738 $ 7,085 $ 915,897 Less: Loans of business held for sale (10) (9,214 ) Total loans and leases (11) $ 906,683 Percentage of outstandings (10) 0.61 % 0.23 % 1.02 % 1.86 % 95.87 % 1.50 % 0.77 % 100.00 % (1) Consumer real estate loans 30-59 days past due includes fully-insured loans of $1.1 billion and nonperforming loans of $266 million . Consumer real estate loans 60-89 days past due includes fully-insured loans of $547 million and nonperforming loans of $216 million . (2) Consumer real estate includes fully-insured loans of $4.8 billion . (3) Consumer real estate includes $2.5 billion and direct/indirect consumer includes $27 million of nonperforming loans. (4) PCI loan amounts are shown gross of the valuation allowance. (5) Total outstandings includes pay option loans of $1.8 billion . The Corporation no longer originates this product. (6) Total outstandings includes auto and specialty lending loans of $48.9 billion , unsecured consumer lending loans of $585 million , U.S. securities-based lending loans of $40.1 billion , non-U.S. consumer loans of $3.0 billion , student loans of $497 million and other consumer loans of $1.1 billion . (7) Total outstandings includes consumer finance loans of $465 million , consumer leases of $1.9 billion and consumer overdrafts of $157 million . (8) Consumer loans accounted for under the fair value option includes residential mortgage loans of $710 million and home equity loans of $341 million . Commercial loans accounted for under the fair value option includes U.S. commercial loans of $2.9 billion and non-U.S. commercial loans of $3.1 billion . For more information, see Note 20 – Fair Value Measurements and Note 21 – Fair Value Option . (9) Total outstandings includes U.S. commercial real estate loans of $54.3 billion and non-U.S. commercial real estate loans of $3.1 billion . (10) Includes non-U.S. credit card loans, which were included in assets of business held for sale on the Consolidated Balance Sheet. (11) The Corporation pledged $143.1 billion of loans to secure potential borrowing capacity with the Federal Reserve Bank and FHLB. This amount is not included in the parenthetical disclosure of loans and leases pledged as collateral on the Consolidated Balance Sheet as there were no related outstanding borrowings.
Schedule of Financing Receivables, Non Accrual Status	The table below presents the Corporation’s nonperforming loans and leases including nonperforming TDRs, and loans accruing past due 90 days or more at December 31, 2017 and 2016 . Nonperforming LHFS are excluded from nonperforming loans and leases as they are recorded at either fair value or the lower of cost or fair value. For more information on the criteria for classification as nonperforming, see Note 1 – Summary of Significant Accounting Principles . Credit Quality Nonperforming Loans and Leases Accruing Past Due 90 Days or More December 31 (Dollars in millions) 2017 2016 2017 2016 Consumer real estate Core portfolio Residential mortgage (1) $ 1,087 $ 1,274 $ 417 $ 486 Home equity 1,079 969 — — Non-core portfolio Residential mortgage (1) 1,389 1,782 2,813 4,307 Home equity 1,565 1,949 — — Credit card and other consumer U.S. credit card n/a n/a 900 782 Non-U.S. credit card n/a n/a — 66 Direct/Indirect consumer 46 28 40 34 Other consumer — 2 — 4 Total consumer 5,166 6,004 4,170 5,679 Commercial U.S. commercial 814 1,256 144 106 Non-U.S. commercial 299 279 3 5 Commercial real estate 112 72 4 7 Commercial lease financing 24 36 19 19 U.S. small business commercial 55 60 75 71 Total commercial 1,304 1,703 245 208 Total loans and leases $ 6,470 $ 7,707 $ 4,415 $ 5,887 (1) Residential mortgage loans in the core and non-core portfolios accruing past due 90 days or more are fully-insured loans. At December 31, 2017 and 2016 , residential mortgage includes $2.2 billion and $3.0 billion of loans on which interest has been curtailed by the FHA, and therefore are no longer accruing interest, although principal is still insured, and $1.0 billion and $1.8 billion of loans on which interest is still accruing. n/a = not applicable
Financing Receivable Credit Quality Indicators	The following tables present certain credit quality indicators for the Corporation’s Consumer Real Estate, Credit Card and Other Consumer, and Commercial portfolio segments, by class of financing receivables, at December 31, 2017 and 2016 . Consumer Real Estate – Credit Quality Indicators (1) Core Residential Mortgage (2) Non-core Residential (2) Residential Mortgage PCI (3) Core Home Equity (2) Non-core Home Equity (2) Home Equity PCI (Dollars in millions) December 31, 2017 Refreshed LTV (4) Less than or equal to 90 percent $ 153,669 $ 12,135 $ 6,872 $ 43,048 $ 7,944 $ 1,781 Greater than 90 percent but less than or equal to 100 percent 3,082 850 559 549 1,053 412 Greater than 100 percent 1,322 1,011 570 648 1,786 523 Fully-insured loans (5) 18,545 5,196 — — — — Total consumer real estate $ 176,618 $ 19,192 $ 8,001 $ 44,245 $ 10,783 $ 2,716 Refreshed FICO score Less than 620 $ 2,234 $ 2,390 $ 1,941 $ 1,169 $ 2,098 $ 452 Greater than or equal to 620 and less than 680 4,531 2,086 1,657 2,371 2,393 466 Greater than or equal to 680 and less than 740 22,934 3,519 2,396 8,115 2,723 786 Greater than or equal to 740 128,374 6,001 2,007 32,590 3,569 1,012 Fully-insured loans (5) 18,545 5,196 — — — — Total consumer real estate $ 176,618 $ 19,192 $ 8,001 $ 44,245 $ 10,783 $ 2,716 (1) Excludes $928 million of loans accounted for under the fair value option. (2) Excludes PCI loans. (3) Includes $1.2 billion of pay option loans. The Corporation no longer originates this product. (4) Refreshed LTV percentages for PCI loans are calculated using the carrying value net of the related valuation allowance. (5) Credit quality indicators are not reported for fully-insured loans as principal repayment is insured. Credit Card and Other Consumer – Credit Quality Indicators U.S. Credit Card Direct/Indirect Consumer Other Consumer (Dollars in millions) December 31, 2017 Refreshed FICO score Less than 620 $ 4,730 $ 1,630 $ 49 Greater than or equal to 620 and less than 680 12,422 2,000 143 Greater than or equal to 680 and less than 740 35,656 11,906 398 Greater than or equal to 740 43,477 34,838 1,921 Other internal credit metrics (1, 2) — 43,456 167 Total credit card and other consumer $ 96,285 $ 93,830 $ 2,678 (1) Other internal credit metrics may include delinquency status, geography or other factors. (2) Direct/indirect consumer includes $42.8 billion of securities-based lending which is overcollateralized and therefore has minimal credit risk. Commercial – Credit Quality Indicators (1) U.S. Commercial Non-U.S. Commercial Commercial Real Estate Commercial Financing U.S. Small Commercial (2) (Dollars in millions) December 31, 2017 Risk ratings Pass rated $ 275,904 $ 96,199 $ 57,732 $ 21,535 $ 322 Reservable criticized 8,932 1,593 566 581 50 Refreshed FICO score (3) Less than 620 223 Greater than or equal to 620 and less than 680 625 Greater than or equal to 680 and less than 740 1,875 Greater than or equal to 740 3,713 Other internal credit metrics (3, 4) 6,841 Total commercial $ 284,836 $ 97,792 $ 58,298 $ 22,116 $ 13,649 (1) Excludes $4.8 billion of loans accounted for under the fair value option. (2) U.S. small business commercial includes $709 million of criticized business card and small business loans which are evaluated using refreshed FICO scores or internal credit metrics, including delinquency status, rather than risk ratings. At December 31, 2017 , 98 percent of the balances where internal credit metrics are used was current or less than 30 days past due. (3) Refreshed FICO score and other internal credit metrics are applicable only to the U.S. small business commercial portfolio. (4) Other internal credit metrics may include delinquency status, application scores, geography or other factors. Consumer Real Estate – Credit Quality Indicators (1) Core Residential Mortgage (2) Non-core Residential (2) Residential Mortgage PCI (3) Core Home Equity (2) Non-core Home Equity (2) Home Equity PCI (Dollars in millions) December 31, 2016 Refreshed LTV (4) Less than or equal to 90 percent $ 129,737 $ 14,280 $ 7,811 $ 47,171 $ 8,480 $ 1,942 Greater than 90 percent but less than or equal to 100 percent 3,634 1,446 1,021 1,006 1,668 630 Greater than 100 percent 1,872 1,972 1,295 1,196 3,311 1,039 Fully-insured loans (5) 21,254 7,475 — — — — Total consumer real estate $ 156,497 $ 25,173 $ 10,127 $ 49,373 $ 13,459 $ 3,611 Refreshed FICO score Less than 620 $ 2,479 $ 3,198 $ 2,741 $ 1,254 $ 2,692 $ 559 Greater than or equal to 620 and less than 680 5,094 2,807 2,241 2,853 3,094 636 Greater than or equal to 680 and less than 740 22,629 4,512 2,916 10,069 3,176 1,069 Greater than or equal to 740 105,041 7,181 2,229 35,197 4,497 1,347 Fully-insured loans (5) 21,254 7,475 — — — — Total consumer real estate $ 156,497 $ 25,173 $ 10,127 $ 49,373 $ 13,459 $ 3,611 (1) Excludes $1.1 billion of loans accounted for under the fair value option. (2) Excludes PCI loans. (3) Includes $1.6 billion of pay option loans. The Corporation no longer originates this product. (4) Refreshed LTV percentages for PCI loans are calculated using the carrying value net of the related valuation allowance. (5) Credit quality indicators are not reported for fully-insured loans as principal repayment is insured. Credit Card and Other Consumer – Credit Quality Indicators U.S. Credit Card Non-U.S. Credit Card Direct/Indirect Consumer Other Consumer (1) (Dollars in millions) December 31, 2016 Refreshed FICO score Less than 620 $ 4,431 $ — $ 1,478 $ 187 Greater than or equal to 620 and less than 680 12,364 — 2,070 222 Greater than or equal to 680 and less than 740 34,828 — 12,491 404 Greater than or equal to 740 40,655 — 33,420 1,525 Other internal credit metrics (2, 3, 4) — 9,214 44,630 161 Total credit card and other consumer $ 92,278 $ 9,214 $ 94,089 $ 2,499 (1) At December 31, 2016 , 19 percent of the other consumer portfolio was associated with portfolios from certain consumer finance businesses that the Corporation previously exited. (2) Other internal credit metrics may include delinquency status, geography or other factors. (3) Direct/indirect consumer includes $43.1 billion of securities-based lending which is overcollateralized and therefore has minimal credit risk and $499 million of loans the Corporation no longer originates, primarily student loans. (4) Non-U.S. credit card represents the U.K. credit card portfolio which was evaluated using internal credit metrics, including delinquency status. At December 31, 2016 , 98 percent of this portfolio was current or less than 30 days past due, one percent was 30-89 days past due and one percent was 90 days or more past due. Commercial – Credit Quality Indicators (1) U.S. Commercial Non-U.S. Commercial Commercial Real Estate Commercial Financing U.S. Small Commercial (2) (Dollars in millions) December 31, 2016 Risk ratings Pass rated $ 261,214 $ 85,689 $ 56,957 $ 21,565 $ 453 Reservable criticized 9,158 3,708 398 810 71 Refreshed FICO score (3) Less than 620 200 Greater than or equal to 620 and less than 680 591 Greater than or equal to 680 and less than 740 1,741 Greater than or equal to 740 3,264 Other internal credit metrics (3, 4) 6,673 Total commercial $ 270,372 $ 89,397 $ 57,355 $ 22,375 $ 12,993 (1) Excludes $6.0 billion of loans accounted for under the fair value option. (2) U.S. small business commercial includes $755 million of criticized business card and small business loans which are evaluated using refreshed FICO scores or internal credit metrics, including delinquency status, rather than risk ratings. At December 31, 2016 , 98 percent of the balances where internal credit metrics are used was current or less than 30 days past due. (3) Refreshed FICO score and other internal credit metrics are applicable only to the U.S. small business commercial portfolio. (4) Other internal credit metrics may include delinquency status, application scores, geography or other factors.
Financing Receivable, Modifications [Line Items]
Accretable Yield Activity	The table below shows activity for the accretable yield on PCI loans, which include the Countrywide Financial Corporation (Countrywide) portfolio and loans repurchased in connection with the 2013 settlement with FNMA. The amount of accretable yield is affected by changes in credit outlooks, including metrics such as default rates and loss severities, prepayment speeds, which can change the amount and period of time over which interest payments are expected to be received, and the interest rates on variable rate loans. The reclassifications from nonaccretable difference during 2017 and 2016 were primarily due to an increase in the expected principal and interest cash flows due to lower default estimates and rising interest rate environment. Rollforward of Accretable Yield (Dollars in millions) Accretable yield, January 1, 2016 $ 4,569 Accretion (722 ) Disposals/transfers (486 ) Reclassifications from nonaccretable difference 444 Accretable yield, December 31, 2016 3,805 Accretion (601 ) Disposals/transfers (634 ) Reclassifications from nonaccretable difference 219 Accretable yield, December 31, 2017 $ 2,789
Consumer real estate
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivables	The following table provides the unpaid principal balance, carrying value and related allowance at December 31, 2017 and 2016 , and the average carrying value and interest income recognized for 2017 , 2016 and 2015 for impaired loans in the Corporation’s Consumer Real Estate portfolio segment. Certain impaired consumer real estate loans do not have a related allowance as the current valuation of these impaired loans exceeded the carrying value, which is net of previously recorded charge-offs. Impaired Loans – Consumer Real Estate Unpaid Balance Carrying Value Related Allowance Unpaid Balance Carrying Value Related Allowance (Dollars in millions) December 31, 2017 December 31, 2016 With no recorded allowance Residential mortgage $ 8,856 $ 6,870 $ — $ 11,151 $ 8,695 $ — Home equity 3,622 1,956 — 3,704 1,953 — With an allowance recorded Residential mortgage $ 2,908 $ 2,828 $ 174 $ 4,041 $ 3,936 $ 219 Home equity 972 900 174 910 824 137 Total Residential mortgage $ 11,764 $ 9,698 $ 174 $ 15,192 $ 12,631 $ 219 Home equity 4,594 2,856 174 4,614 2,777 137 Average Interest (1) Average Interest (1) Average Interest (1) 2017 2016 2015 With no recorded allowance Residential mortgage $ 7,737 $ 311 $ 10,178 $ 360 $ 13,867 $ 403 Home equity 1,997 109 1,906 90 1,777 89 With an allowance recorded Residential mortgage $ 3,414 $ 123 $ 5,067 $ 167 $ 7,290 $ 236 Home equity 858 24 852 24 785 24 Total Residential mortgage $ 11,151 $ 434 $ 15,245 $ 527 $ 21,157 $ 639 Home equity 2,855 133 2,758 114 2,562 113 (1) Interest income recognized includes interest accrued and collected on the outstanding balances of accruing impaired loans as well as interest cash collections on nonaccruing impaired loans for which the principal is considered collectible.
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructurings on Financing Receivables	The table below presents the carrying value of consumer real estate loans that entered into payment default during 2017 , 2016 and 2015 that were modified in a TDR during the 12 months preceding payment default. A payment default for consumer real estate TDRs is recognized when a borrower has missed three monthly payments (not necessarily consecutively) since modification. Consumer Real Estate – TDRs Entering Payment Default that were Modified During the Preceding 12 Months (Dollars in millions) 2017 2016 2015 Modifications under government programs $ 81 $ 262 $ 457 Modifications under proprietary programs 138 196 287 Loans discharged in Chapter 7 bankruptcy (1) 116 158 285 Trial modifications (2) 391 824 3,178 Total modifications $ 726 $ 1,440 $ 4,207 (1) Includes loans discharged in Chapter 7 bankruptcy with no change in repayment terms that are classified as TDRs. (2) Includes trial modification offers to which the customer did not respond. The table below presents the December 31, 2017 , 2016 and 2015 carrying value for consumer real estate loans that were modified in a TDR during 2017 , 2016 and 2015 , by type of modification. Consumer Real Estate – Modification Programs TDRs Entered into During (Dollars in millions) 2017 2016 2015 Modifications under government programs Contractual interest rate reduction $ 59 $ 151 $ 431 Principal and/or interest forbearance 4 13 11 Other modifications (1) 22 23 46 Total modifications under government programs 85 187 488 Modifications under proprietary programs Contractual interest rate reduction 281 235 219 Capitalization of past due amounts 63 40 79 Principal and/or interest forbearance 38 72 168 Other modifications (1) 55 75 129 Total modifications under proprietary programs 437 422 595 Trial modifications 569 831 1,968 Loans discharged in Chapter 7 bankruptcy (2) 211 226 379 Total modifications $ 1,302 $ 1,666 $ 3,430 (1) Includes other modifications such as term or payment extensions and repayment plans. (2) Includes loans discharged in Chapter 7 bankruptcy with no change in repayment terms that are classified as TDRs. The table below presents the December 31, 2017 , 2016 and 2015 unpaid principal balance, carrying value, and average pre- and post-modification interest rates on consumer real estate loans that were modified in TDRs during 2017 , 2016 and 2015 , and net charge-offs recorded during the period in which the modification occurred. The following Consumer Real Estate portfolio segment tables include loans that were initially classified as TDRs during the period and also loans that had previously been classified as TDRs and were modified again during the period. Consumer Real Estate – TDRs Entered into During 2017, 2016 and 2015 (1) Unpaid Principal Balance Carrying Value Pre-Modification Interest Rate Post-Modification Interest Rate (2) Net Charge-offs (3) (Dollars in millions) December 31, 2017 2017 Residential mortgage $ 824 $ 712 4.43 % 4.16 % $ 6 Home equity 764 590 4.22 3.49 42 Total $ 1,588 $ 1,302 4.33 3.83 $ 48 December 31, 2016 2016 Residential mortgage $ 1,130 $ 1,017 4.73 % 4.16 % $ 11 Home equity 849 649 3.95 2.72 61 Total $ 1,979 $ 1,666 4.40 3.54 $ 72 December 31, 2015 2015 Residential mortgage $ 2,986 $ 2,655 4.98 % 4.43 % $ 97 Home equity 1,019 775 3.54 3.17 84 Total $ 4,005 $ 3,430 4.61 4.11 $ 181 (1) During 2017 , there was no forgiveness of principal related to residential mortgage loans in connection with TDRs compared to $13 million and $396 million during 2016 and 2015 . (2) The post-modification interest rate reflects the interest rate applicable only to permanently completed modifications, which exclude loans that are in a trial modification period. (3) Net charge-offs include amounts recorded on loans modified during the period that are no longer held by the Corporation at December 31, 2017, 2016 and 2015 due to sales and other dispositions.
Credit card and other consumer
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivables	The following table provides the unpaid principal balance, carrying value and related allowance at December 31, 2017 and 2016 , and the average carrying value and interest income recognized for 2017 , 2016 and 2015 on TDRs within the Credit Card and Other Consumer portfolio segment. Impaired Loans – Credit Card and Other Consumer Unpaid Balance Carrying Value (1) Related Allowance Unpaid Balance Carrying Value (1) Related Allowance (Dollars in millions) December 31, 2017 December 31, 2016 With no recorded allowance Direct/Indirect consumer $ 58 $ 28 $ — $ 49 $ 22 $ — With an allowance recorded U.S. credit card $ 454 $ 461 $ 125 $ 479 $ 485 $ 128 Non-U.S. credit card n/a n/a n/a 88 100 61 Direct/Indirect consumer 1 1 — 3 3 — Total U.S. credit card $ 454 $ 461 $ 125 $ 479 $ 485 $ 128 Non-U.S. credit card n/a n/a n/a 88 100 61 Direct/Indirect consumer 59 29 — 52 25 — Average Interest (2) Average Interest (2) Average Interest (2) 2017 2016 2015 With no recorded allowance Direct/Indirect consumer $ 21 $ 2 $ 20 $ — $ 22 $ — With an allowance recorded U.S. credit card $ 464 $ 25 $ 556 $ 31 $ 749 $ 43 Non-U.S. credit card 47 1 111 3 145 4 Direct/Indirect consumer 2 — 10 1 51 3 Total U.S. credit card $ 464 $ 25 $ 556 $ 31 $ 749 $ 43 Non-U.S. credit card 47 1 111 3 145 4 Direct/Indirect consumer 23 2 30 1 73 3 (1) Includes accrued interest and fees. (2) Interest income recognized includes interest accrued and collected on the outstanding balances of accruing impaired loans as well as interest cash collections on nonaccruing impaired loans for which the principal is considered collectible. n/a = not applicable
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructurings on Financing Receivables	The table below provides information on the Corporation’s primary modification programs for the Credit Card and Other Consumer TDR portfolio at December 31, 2017 and 2016 . Credit Card and Other Consumer – TDRs by Program Type at December 31 Internal Programs External Programs Other (1) Total Percent of Balances Current or Less Than 30 Days Past Due (Dollars in millions) 2017 2016 2017 2016 2017 2016 2017 2016 2017 2016 U.S. credit card $ 203 $ 220 $ 257 $ 264 $ 1 $ 1 $ 461 $ 485 86.92 % 88.99 % Non-U.S. credit card n/a 11 n/a 7 n/a 82 n/a 100 n/a 38.47 Direct/Indirect consumer 1 2 — 1 28 22 29 25 88.16 90.49 Total TDRs by program type $ 204 $ 233 $ 257 $ 272 $ 29 $ 105 $ 490 $ 610 87.00 80.79 (1) Other TDRs for non-U.S. credit card included modifications of accounts that are ineligible for a fixed payment plan. n/a = not applicable The table below provides information on the Corporation’s Credit Card and Other Consumer TDR portfolio including the December 31, 2017 , 2016 and 2015 unpaid principal balance, carrying value, and average pre- and post-modification interest rates of loans that were modified in TDRs during 2017 , 2016 and 2015 , and net charge-offs recorded during the period in which the modification occurred. Credit Card and Other Consumer – TDRs Entered into During 2017, 2016 and 2015 Unpaid Principal Balance Carrying Value (1) Pre- Modification Interest Rate Post- Modification Interest Rate (Dollars in millions) December 31, 2017 U.S. credit card $ 203 $ 213 18.47 % 5.32 % Direct/Indirect consumer 37 22 4.81 4.30 Total (2) $ 240 $ 235 17.17 5.22 December 31, 2016 U.S. credit card $ 163 $ 172 17.54 % 5.47 % Non-U.S. credit card 66 75 23.99 0.52 Direct/Indirect consumer 21 13 3.44 3.29 Total (2) $ 250 $ 260 18.73 3.93 December 31, 2015 U.S. credit card $ 205 $ 218 17.07 % 5.08 % Non-U.S. credit card 74 86 24.05 0.53 Direct/Indirect consumer 19 12 5.95 5.19 Total (2) $ 298 $ 316 18.58 3.84 (1) Includes accrued interest and fees. (2) Net charge-offs were $52 million , $74 million and $98 million in 2017 , 2016 and 2015 , respectively.
Commercial Portfolio Segment
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivables	The table below provides information on impaired loans in the Commercial loan portfolio segment including the unpaid principal balance, carrying value and related allowance at December 31, 2017 and 2016 , and the average carrying value and interest income recognized for 2017 , 2016 and 2015 . Certain impaired commercial loans do not have a related allowance as the valuation of these impaired loans exceeded the carrying value, which is net of previously recorded charge-offs. Impaired Loans – Commercial Unpaid Balance Carrying Value Related Allowance Unpaid Balance Carrying Value Related Allowance (Dollars in millions) December 31, 2017 December 31, 2016 With no recorded allowance U.S. commercial $ 576 $ 571 $ — $ 860 $ 827 $ — Non-U.S. commercial 14 11 — 130 130 — Commercial real estate 83 80 — 77 71 — With an allowance recorded U.S. commercial $ 1,393 $ 1,109 $ 98 $ 2,018 $ 1,569 $ 132 Non-U.S. commercial 528 507 58 545 432 104 Commercial real estate 133 41 4 243 96 10 Commercial lease financing 20 18 3 6 4 — U.S. small business commercial (1) 84 70 27 85 73 27 Total U.S. commercial $ 1,969 $ 1,680 $ 98 $ 2,878 $ 2,396 $ 132 Non-U.S. commercial 542 518 58 675 562 104 Commercial real estate 216 121 4 320 167 10 Commercial lease financing 20 18 3 6 4 — U.S. small business commercial (1) 84 70 27 85 73 27 Average Interest (2) Average Interest (2) Average Interest (2) 2017 2016 2015 With no recorded allowance U.S. commercial $ 772 $ 12 $ 787 $ 14 $ 688 $ 14 Non-U.S. commercial 46 — 34 1 29 1 Commercial real estate 69 1 67 — 75 1 With an allowance recorded U.S. commercial $ 1,260 $ 33 $ 1,569 $ 59 $ 953 $ 48 Non-U.S. commercial 463 13 409 14 125 7 Commercial real estate 73 2 92 4 216 7 Commercial lease financing 8 — 2 — — — U.S. small business commercial (1) 73 — 87 1 109 1 Total U.S. commercial $ 2,032 $ 45 $ 2,356 $ 73 $ 1,641 $ 62 Non-U.S. commercial 509 13 443 15 154 8 Commercial real estate 142 3 159 4 291 8 Commercial lease financing 8 — 2 — — — U.S. small business commercial (1) 73 — 87 1 109 1 (1) Includes U.S. small business commercial renegotiated TDR loans and related allowance. (2) Interest income recognized includes interest accrued and collected on the outstanding balances of accruing impaired loans as well as interest cash collections on nonaccruing impaired loans for which the principal is considered collectible.
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructurings on Financing Receivables	The table below presents the December 31, 2017 , 2016 and 2015 unpaid principal balance and carrying value of commercial loans that were modified as TDRs during 2017 , 2016 and 2015 , and net charge-offs that were recorded during the period in which the modification occurred. The table below includes loans that were initially classified as TDRs during the period and also loans that had previously been classified as TDRs and were modified again during the period. Commercial – TDRs Entered into During 2017, 2016 and 2015 Unpaid Principal Balance Carrying Value (Dollars in millions) December 31, 2017 U.S. commercial $ 1,033 $ 922 Non-U.S. commercial 105 105 Commercial real estate 35 24 Commercial lease financing 20 17 U.S. small business commercial (1) 13 13 Total (2) $ 1,206 $ 1,081 December 31, 2016 U.S. commercial $ 1,556 $ 1,482 Non-U.S. commercial 255 253 Commercial real estate 77 77 Commercial lease financing 6 4 U.S. small business commercial (1) 1 1 Total (2) $ 1,895 $ 1,817 December 31, 2015 U.S. commercial $ 853 $ 779 Non-U.S. commercial 329 326 Commercial real estate 42 42 U.S. small business commercial (1) 14 11 Total (2) $ 1,238 $ 1,158 (1) U.S. small business commercial TDRs are comprised of renegotiated small business card loans. (2) Net charge-offs were $138 million , $137 million and $31 million in 2017 , 2016 and 2015 , respectively.

Allowance for Credit Losses (Ta

Allowance for Credit Losses (Tables)	12 Months Ended
	Dec. 31, 2017
Receivables [Abstract]
Changes in the Allowance for Credit Losses	The table below summarizes the changes in the allowance for credit losses by portfolio segment for 2017 , 2016 and 2015 . Consumer Real Estate (1) Credit Card and Other Consumer Commercial Total Allowance (Dollars in millions) 2017 Allowance for loan and lease losses, January 1 $ 2,750 $ 3,229 $ 5,258 $ 11,237 Loans and leases charged off (770 ) (3,774 ) (1,075 ) (5,619 ) Recoveries of loans and leases previously charged off 657 809 174 1,640 Net charge-offs (2) (113 ) (2,965 ) (901 ) (3,979 ) Write-offs of PCI loans (3) (207 ) — — (207 ) Provision for loan and lease losses (4) (710 ) 3,437 654 3,381 Other (5) — (38 ) (1 ) (39 ) Allowance for loan and lease losses, December 31 1,720 3,663 5,010 10,393 Reserve for unfunded lending commitments, January 1 — — 762 762 Provision for unfunded lending commitments — — 15 15 Reserve for unfunded lending commitments, December 31 — — 777 777 Allowance for credit losses, December 31 $ 1,720 $ 3,663 $ 5,787 $ 11,170 2016 Allowance for loan and lease losses, January 1 $ 3,914 $ 3,471 $ 4,849 $ 12,234 Loans and leases charged off (1,155 ) (3,553 ) (740 ) (5,448 ) Recoveries of loans and leases previously charged off 619 770 238 1,627 Net charge-offs (2) (536 ) (2,783 ) (502 ) (3,821 ) Write-offs of PCI loans (3) (340 ) — — (340 ) Provision for loan and lease losses (4) (258 ) 2,826 1,013 3,581 Other (5) (30 ) (42 ) (102 ) (174 ) Total allowance for loan and lease losses, December 31 2,750 3,472 5,258 11,480 Less: Allowance included in assets of business held for sale (6) — (243 ) — (243 ) Allowance for loan and lease losses, December 31 2,750 3,229 5,258 11,237 Reserve for unfunded lending commitments, January 1 — — 646 646 Provision for unfunded lending commitments — — 16 16 Other (5) — — 100 100 Reserve for unfunded lending commitments, December 31 — — 762 762 Allowance for credit losses, December 31 $ 2,750 $ 3,229 $ 6,020 $ 11,999 2015 Allowance for loan and lease losses, January 1 $ 5,935 $ 4,047 $ 4,437 $ 14,419 Loans and leases charged off (1,841 ) (3,620 ) (644 ) (6,105 ) Recoveries of loans and leases previously charged off 732 813 222 1,767 Net charge-offs (1,109 ) (2,807 ) (422 ) (4,338 ) Write-offs of PCI loans (3) (808 ) — — (808 ) Provision for loan and lease losses (4) (70 ) 2,278 835 3,043 Other (5) (34 ) (47 ) (1 ) (82 ) Allowance for loan and lease losses, December 31 3,914 3,471 4,849 12,234 Reserve for unfunded lending commitments, January 1 — — 528 528 Provision for unfunded lending commitments — — 118 118 Reserve for unfunded lending commitments, December 31 — — 646 646 Allowance for credit losses, December 31 $ 3,914 $ 3,471 $ 5,495 $ 12,880 (1) Includes valuation allowance associated with the PCI loan portfolio. (2) Includes net charge-offs related to the non-U.S. credit card loan portfolio, which was included in assets of business held for sale on the Consolidated Balance Sheet at December 31, 2016. In 2017, the Corporation sold its non-U.S. consumer credit card business. (3) Includes write-offs of $87 million , $60 million and $234 million associated with the sale of PCI loans in 2017 , 2016 and 2015 , respectively. (4) Includes provision expense of $76 million and a benefit of $45 million and $40 million associated with the PCI loan portfolio in 2017 , 2016 and 2015 , respectively. (5) Primarily represents the net impact of portfolio sales, consolidations and deconsolidations, foreign currency translation adjustments, transfers to held-for-sale and certain other reclassifications. (6) Represents allowance for loan and lease losses related to the non-U.S. credit card loan portfolio, which was sold in 2017. The table below presents the allowance and the carrying value of outstanding loans and leases by portfolio segment at December 31, 2017 and 2016 . Allowance and Carrying Value by Portfolio Segment Consumer Credit Card and Other Consumer Commercial Total (Dollars in millions) December 31, 2017 Impaired loans and troubled debt restructurings (1) Allowance for loan and lease losses (2) $ 348 $ 125 $ 190 $ 663 Carrying value (3) 12,554 490 2,407 15,451 Allowance as a percentage of carrying value 2.77 % 25.51 % 7.89 % 4.29 % Loans collectively evaluated for impairment Allowance for loan and lease losses $ 1,083 $ 3,538 $ 4,820 $ 9,441 Carrying value (3, 4) 238,284 192,303 474,284 904,871 Allowance as a percentage of carrying value (4) 0.45 % 1.84 % 1.02 % 1.04 % Purchased credit-impaired loans Valuation allowance $ 289 n/a n/a $ 289 Carrying value gross of valuation allowance 10,717 n/a n/a 10,717 Valuation allowance as a percentage of carrying value 2.70 % n/a n/a 2.70 % Total Allowance for loan and lease losses $ 1,720 $ 3,663 $ 5,010 $ 10,393 Carrying value (3, 4) 261,555 192,793 476,691 931,039 Allowance as a percentage of carrying value (4) 0.66 % 1.90 % 1.05 % 1.12 % December 31, 2016 Impaired loans and troubled debt restructurings (1) Allowance for loan and lease losses (2) $ 356 $ 189 $ 273 $ 818 Carrying value (3) 15,408 610 3,202 19,220 Allowance as a percentage of carrying value 2.31 % 30.98 % 8.53 % 4.26 % Loans collectively evaluated for impairment Allowance for loan and lease losses $ 1,975 $ 3,283 $ 4,985 $ 10,243 Carrying value (3, 4) 229,094 197,470 449,290 875,854 Allowance as a percentage of carrying value (4) 0.86 % 1.66 % 1.11 % 1.17 % Purchased credit-impaired loans Valuation allowance $ 419 n/a n/a $ 419 Carrying value gross of valuation allowance 13,738 n/a n/a 13,738 Valuation allowance as a percentage of carrying value 3.05 % n/a n/a 3.05 % Less: Assets of business held for sale (5) Allowance for loan and lease losses (6) n/a $ (243 ) n/a $ (243 ) Carrying value (3) n/a (9,214 ) n/a (9,214 ) Total Allowance for loan and lease losses $ 2,750 $ 3,229 $ 5,258 $ 11,237 Carrying value (3, 4) 258,240 188,866 452,492 899,598 Allowance as a percentage of carrying value (4) 1.06 % 1.71 % 1.16 % 1.25 % (1) Impaired loans include nonperforming commercial loans and all TDRs, including both commercial and consumer TDRs. Impaired loans exclude nonperforming consumer loans unless they are TDRs, and all consumer and commercial loans accounted for under the fair value option. (2) Allowance for loan and lease losses includes $27 million related to impaired U.S. small business commercial at both December 31, 2017 and 2016 . (3) Amounts are presented gross of the allowance for loan and lease losses. (4) Outstanding loan and lease balances and ratios do not include loans accounted for under the fair value option of $5.7 billion and $7.1 billion at December 31, 2017 and 2016 . (5) Represents allowance for loan and lease losses and loans related to the non-U.S. credit card loan portfolio, which was included in assets of business held for sale on the Consolidated Balance Sheet at December 31, 2016 . In 2017, the Corporation sold its non-U.S. consumer credit card business. (6) Includes $61 million of allowance for loan and lease losses related to impaired loans and TDRs and $ 182 million related to loans collectively evaluated for impairment at December 31, 2016 . n/a = not applicable

Securitizations and Other Var38

Securitizations and Other Variable Interest Entities (Tables)	12 Months Ended
	Dec. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Mortgage Related Securitizations	The table below summarizes select information related to first-lien mortgage securitizations for 2017 , 2016 and 2015 . First-lien Mortgage Securitizations Residential Mortgage - Agency Commercial Mortgage (Dollars in millions) 2017 2016 2015 2017 2016 2015 Cash proceeds from new securitizations (1) $ 14,467 $ 24,201 $ 27,164 $ 5,641 $ 3,887 $ 7,945 Gains on securitizations (2) 158 370 894 91 38 49 Repurchases from securitization trusts (3) 2,713 3,611 3,716 — — — (1) The Corporation transfers residential mortgage loans to securitizations sponsored by the GSEs or GNMA in the normal course of business and receives RMBS in exchange which may then be sold into the market to third-party investors for cash proceeds. (2) A majority of the first-lien residential mortgage loans securitized are initially classified as LHFS and accounted for under the fair value option. Gains recognized on these LHFS prior to securitization, which totaled $243 million , $487 million and $750 million net of hedges, during 2017 , 2016 and 2015 , respectively, are not included in the table above. (3) The Corporation may have the option to repurchase delinquent loans out of securitization trusts, which reduces the amount of servicing advances it is required to make. The Corporation may also repurchase loans from securitization trusts to perform modifications. Repurchased loans include FHA-insured mortgages collateralizing GNMA securities.
Variable Interest Entity [Line Items]
Schedule of Variable Interest Entities	The table below summarizes select information related to home equity loan, credit card and other asset-backed VIEs in which the Corporation held a variable interest at December 31, 2017 and 2016 . Home Equity Loan, Credit Card and Other Asset-backed VIEs Home Equity Loan (1) Credit Card (2, 3) Resecuritization Trusts Municipal Bond Trusts December 31 (Dollars in millions) 2017 2016 2017 2016 2017 2016 2017 2016 Unconsolidated VIEs Maximum loss exposure $ 1,522 $ 2,732 $ — $ — $ 8,204 $ 9,906 $ 1,631 $ 1,635 On-balance sheet assets Senior securities (4) : Trading account assets $ — $ — $ — $ — $ 869 $ 902 $ 33 $ — Debt securities carried at fair value 36 46 — — 1,661 2,338 — — Held-to-maturity securities — — — — 5,644 6,569 — — Subordinate securities (4) — — — — 30 97 — — Total retained positions $ 36 $ 46 $ — $ — $ 8,204 $ 9,906 $ 33 $ — Total assets of VIEs (5) $ 2,432 $ 4,274 $ — $ — $ 19,281 $ 22,155 $ 2,287 $ 2,406 Consolidated VIEs Maximum loss exposure $ 112 $ 149 $ 24,337 $ 25,859 $ 628 $ 420 $ 1,453 $ 1,442 On-balance sheet assets Trading account assets $ — $ — $ — $ — $ 1,557 $ 1,428 $ 1,452 $ 1,454 Loans and leases 177 244 32,554 35,135 — — — — Allowance for loan and lease losses (9 ) (16 ) (988 ) (1,007 ) — — — — All other assets 6 7 1,385 793 — — 1 — Total assets $ 174 $ 235 $ 32,951 $ 34,921 $ 1,557 $ 1,428 $ 1,453 $ 1,454 On-balance sheet liabilities Short-term borrowings $ — $ — $ — $ — $ — $ — $ 312 $ 348 Long-term debt 76 108 8,598 9,049 929 1,008 — 12 All other liabilities — — 16 13 — — — — Total liabilities $ 76 $ 108 $ 8,614 $ 9,062 $ 929 $ 1,008 $ 312 $ 360 (1) For unconsolidated home equity loan VIEs, the maximum loss exposure includes outstanding trust certificates issued by trusts in rapid amortization, net of recorded reserves. For both consolidated and unconsolidated home equity loan VIEs, the maximum loss exposure excludes the reserve for representations and warranties obligations and corporate guarantees. For more information, see Note 7 – Representations and Warranties Obligations and Corporate Guarantees . (2) At December 31, 2017 and 2016 , loans and leases in the consolidated credit card trust included $15.6 billion and $17.6 billion of seller’s interest. (3) At December 31, 2017 and 2016 , all other assets in the consolidated credit card trust included restricted cash, certain short-term investments, and unbilled accrued interest and fees. (4) The retained senior and subordinate securities were valued using quoted market prices or observable market inputs (Level 2 of the fair value hierarchy). (5) Total assets include loans the Corporation transferred with which it has continuing involvement, which may include servicing the loan.
First Lien Mortgages
Variable Interest Entity [Line Items]
Schedule of Variable Interest Entities	The table below summarizes select information related to first-lien mortgage securitization trusts in which the Corporation held a variable interest at December 31, 2017 and 2016 . First-lien Mortgage VIEs Residential Mortgage Non-agency Agency Prime Subprime Alt-A Commercial Mortgage December 31 (Dollars in millions) 2017 2016 2017 2016 2017 2016 2017 2016 2017 2016 Unconsolidated VIEs Maximum loss exposure (1) $ 19,110 $ 22,661 $ 689 $ 757 $ 2,643 $ 2,750 $ 403 $ 560 $ 585 $ 344 On-balance sheet assets Senior securities: Trading account assets $ 716 $ 1,399 $ 6 $ 20 $ 10 $ 112 $ 50 $ 118 $ 108 $ 51 Debt securities carried at fair value 15,036 17,620 477 441 2,221 2,235 351 305 — — Held-to-maturity securities 3,348 3,630 — — — — — — 274 64 Subordinate securities — — 5 9 38 25 2 24 69 81 Residual interests — — — — — — — — 19 25 All other assets (2) 10 12 — 28 — — — 113 — — Total retained positions $ 19,110 $ 22,661 $ 488 $ 498 $ 2,269 $ 2,372 $ 403 $ 560 $ 470 $ 221 Principal balance outstanding (3) $ 232,761 $ 265,332 $ 10,549 $ 16,280 $ 10,254 $ 19,373 $ 28,129 $ 35,788 $ 26,504 $ 23,826 Consolidated VIEs Maximum loss exposure (1) $ 14,502 $ 18,084 $ 571 $ — $ — $ — $ — $ 25 $ — $ — On-balance sheet assets Trading account assets $ 232 $ 434 $ 571 $ — $ — $ — $ — $ 99 $ — $ — Loans and leases, net 14,030 17,223 — — — — — — — — All other assets 240 427 — — — — — — — — Total assets $ 14,502 $ 18,084 $ 571 $ — $ — $ — $ — $ 99 $ — $ — On-balance sheet liabilities Long-term debt $ — $ — $ — $ — $ — $ — $ — $ 74 $ — $ — All other liabilities 3 4 — — — — — — — — Total liabilities $ 3 $ 4 $ — $ — $ — $ — $ — $ 74 $ — $ — (1) Maximum loss exposure includes obligations under loss-sharing reinsurance and other arrangements for non-agency residential mortgage and commercial mortgage securitizations, but excludes the reserve for representations and warranties obligations and corporate guarantees and also excludes servicing advances and other servicing rights and obligations. For more information, see Note 7 – Representations and Warranties Obligations and Corporate Guarantees and Note 20 – Fair Value Measurements . (2) Not included in the table above are all other assets of $148 million and $189 million , representing the unpaid principal balance of mortgage loans eligible for repurchase from unconsolidated residential mortgage securitization vehicles, principally guaranteed by GNMA, and all other liabilities of $148 million and $189 million , representing the principal amount that would be payable to the securitization vehicles if the Corporation was to exercise the repurchase option, at December 31, 2017 and 2016 . (3) Principal balance outstanding includes loans where the Corporation was the transferor to securitization vehicles with which it has continuing involvement, which may include servicing the loans.
Other Variable Interest Entities
Variable Interest Entity [Line Items]
Schedule of Variable Interest Entities	The table below summarizes select information related to other VIEs in which the Corporation held a variable interest at December 31, 2017 and 2016 . Other VIEs Consolidated Unconsolidated Total Consolidated Unconsolidated Total December 31 (Dollars in millions) 2017 2016 Maximum loss exposure $ 4,660 $ 19,785 $ 24,445 $ 6,114 $ 17,754 $ 23,868 On-balance sheet assets Trading account assets $ 2,709 $ 346 $ 3,055 $ 2,358 $ 233 $ 2,591 Debt securities carried at fair value — 160 160 — 122 122 Loans and leases 2,152 3,596 5,748 3,399 3,249 6,648 Allowance for loan and lease losses (3 ) (32 ) (35 ) (9 ) (24 ) (33 ) Loans held-for-sale 27 940 967 188 464 652 All other assets 62 14,276 14,338 369 13,156 13,525 Total $ 4,947 $ 19,286 $ 24,233 $ 6,305 $ 17,200 $ 23,505 On-balance sheet liabilities Long-term debt (1) $ 270 $ — $ 270 $ 395 $ — $ 395 All other liabilities 18 3,417 3,435 24 2,959 2,983 Total $ 288 $ 3,417 $ 3,705 $ 419 $ 2,959 $ 3,378 Total assets of VIEs $ 4,947 $ 69,746 $ 74,693 $ 6,305 $ 62,269 $ 68,574 (1) Includes $1 million and $229 million of long-term debt at December 31, 2017 and 2016 issued by other consolidated VIEs, which has recourse to the general credit of the Corporation.

Representations and Warrantie39

Representations and Warranties Obligations and Corporate Guarantees (Tables)	12 Months Ended
	Dec. 31, 2017
Representations and Warranties Obligations and Corporate Guarantees [Abstract]
Outstanding Claims by Category and Product	The table below presents unresolved repurchase claims at December 31, 2017 and 2016 . The unresolved repurchase claims include only claims where the Corporation believes that the counterparty has the contractual right to submit claims. The unresolved repurchase claims predominantly relate to subprime and pay option first-lien loans and home equity loans originated primarily between 2004 and 2008. For more information, see Private-label Securitizations and Whole-loan Sales Experience in this Note and Note 12 – Commitments and Contingencies . Unresolved Repurchase Claims by Counterparty, Net of Duplicate Claims December 31 (Dollars in millions) 2017 2016 By counterparty Private-label securitization trustees, whole-loan investors, including third-party securitization sponsors and other (1) $ 16,064 $ 16,685 Monolines 1,565 1,583 GSEs 5 9 Total unresolved repurchase claims by counterparty, net of duplicate claims $ 17,634 $ 18,277 (1) Includes $11.4 billion and $11.9 billion of claims based on individual file reviews and $4.7 billion and $4.8 billion of claims submitted without individual file reviews at December 31, 2017 and 2016 .
Rollforward of Liability for Representation and Warranties	The table below presents a rollforward of the reserve for representations and warranties and corporate guarantees. Representations and Warranties and Corporate Guarantees (Dollars in millions) 2017 2016 Reserve for representations and warranties and corporate guarantees, January 1 $ 2,339 $ 11,326 Additions for new sales 4 4 Payments (1) (814 ) (9,097 ) Provision 393 106 Reserve for representations and warranties and corporate guarantees, December 31 $ 1,922 $ 2,339 (1) In February 2016, the Corporation made an $8.5 billion settlement payment as part of the settlement with BNY Mellon

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	The table below presents goodwill balances by business segment and All Other at December 31, 2017 and 2016 . The reporting units utilized for goodwill impairment testing are the operating segments or one level below. Goodwill December 31 (Dollars in millions) 2017 2016 Consumer Banking $ 30,123 $ 30,123 Global Wealth & Investment Management 9,677 9,681 Global Banking 23,923 23,923 Global Markets 5,182 5,197 All Other 46 820 Less: Goodwill of business held for sale (1) — (775 ) Total goodwill $ 68,951 $ 68,969 (1) Reflects the goodwill assigned to the non-U.S. consumer credit card business, which was included in assets of business held for sale on the Consolidated Balance Sheet at December 31, 2016 . In 2017 , the Corporation sold its non-U.S. consumer credit card business.
Intangible Assets	The table below presents the gross and net carrying values and accumulated amortization for intangible assets at December 31, 2017 and 2016 . Intangible Assets (1, 2) Gross Accumulated Net Gross Accumulated Net (Dollars in millions) December 31, 2017 December 31, 2016 Purchased credit card and affinity relationships $ 5,919 $ 5,604 $ 315 $ 6,830 $ 6,243 $ 587 Core deposit and other intangibles (3) 3,835 2,140 1,695 3,836 2,046 1,790 Customer relationships 3,886 3,584 302 3,887 3,275 612 Total intangible assets (4) $ 13,640 $ 11,328 $ 2,312 $ 14,553 $ 11,564 $ 2,989 (1) Excludes fully amortized intangible assets. (2) At December 31, 2017 and 2016 , none of the intangible assets were impaired. (3) Includes $1.6 billion at both December 31, 2017 and 2016 of intangible assets associated with trade names that have an indefinite life and, accordingly, are not amortized. (4) Includes $67 million at December 31, 2016 of intangible assets assigned to the non-U.S. consumer credit card business, which was included in assets of business held for sale on the Consolidated Balance Sheet at December 31, 2016.

Deposits (Tables)

Deposits (Tables)	12 Months Ended
	Dec. 31, 2017
Deposits [Abstract]
Details of Time Deposits	The table below presents information about the Corporation’s time deposits of $100 thousand or more at December 31, 2017 and 2016 . The Corporation also had aggregate time deposits of $17.0 billion and $18.3 billion in denominations that met or exceeded the Federal Deposit Insurance Corporation (FDIC) insurance limit at December 31, 2017 and 2016 . Time Deposits of $100 Thousand or More December 31, 2017 December 31 (Dollars in millions) Three Months or Less Over Three Twelve Months Thereafter Total Total U.S. certificates of deposit and other time deposits $ 12,505 $ 10,660 $ 2,027 $ 25,192 $ 32,898 Non-U.S. certificates of deposit and other time deposits 10,561 3,652 1,259 15,472 14,677
Schedule of Maturities for Total Time Deposits	The scheduled contractual maturities for total time deposits at December 31, 2017 are presented in the table below. Contractual Maturities of Total Time Deposits (Dollars in millions) U.S. Non-U.S. Total Due in 2018 $ 46,774 $ 14,264 $ 61,038 Due in 2019 2,623 657 3,280 Due in 2020 1,661 49 1,710 Due in 2021 514 15 529 Due in 2022 452 562 1,014 Thereafter 264 9 273 Total time deposits $ 52,288 $ 15,556 $ 67,844

Federal Funds Sold or Purchas42

Federal Funds Sold or Purchased, Securities Financing Agreements and Short-term Borrowings (Tables)	12 Months Ended
	Dec. 31, 2017
Federal Funds Sold, Securities Borrowed or Purchased Under Agreements to Resell and Short-term Borrowings [Abstract]
Federal Funds Sold Securities Borrowed or Purchased Under Agreements to Resell and Short Term Borrowings	The table below presents federal funds sold or purchased, securities financing agreements, which include securities borrowed or purchased under agreements to resell and securities loaned or sold under agreements to repurchase, and short-term borrowings. The Corporation elects to account for certain securities financing agreements and short-term borrowings under the fair value option. For more information on the election of the fair value option, see Note 21 – Fair Value Option . Amount Rate Amount Rate (Dollars in millions) 2017 2016 Federal funds sold and securities borrowed or purchased under agreements to resell Average during year $ 222,818 1.07 % $ 216,161 0.52 % Maximum month-end balance during year 237,064 n/a 225,015 n/a Federal funds purchased and securities loaned or sold under agreements to repurchase Average during year $ 199,501 1.30 % $ 183,818 0.97 % Maximum month-end balance during year 218,017 n/a 196,631 n/a Short-term borrowings Average during year 37,337 2.48 % 29,440 1.95 % Maximum month-end balance during year 46,202 n/a 33,051 n/a n/a = not applicable
Offsetting Assets [Line Items]
Transfer of Certain Financial Assets Accounted for as Secured Borrowings	The following tables present securities sold under agreements to repurchase and securities loaned by remaining contractual term to maturity and class of collateral pledged. Included in “Other” are transactions where the Corporation acts as the lender in a securities lending agreement and receives securities that can be pledged as collateral or sold. Certain agreements contain a right to substitute collateral and/or terminate the agreement prior to maturity at the option of the Corporation or the counterparty. Such agreements are included in the table below based on the remaining contractual term to maturity. Remaining Contractual Maturity Overnight and Continuous 30 Days or Less After 30 Days Through 90 Days Greater than 90 Days (1) Total (Dollars in millions) December 31, 2017 Securities sold under agreements to repurchase $ 125,956 $ 79,913 $ 46,091 $ 38,935 $ 290,895 Securities loaned 9,853 5,658 2,043 4,133 21,687 Other 22,711 — — — 22,711 Total $ 158,520 $ 85,571 $ 48,134 $ 43,068 $ 335,293 December 31, 2016 Securities sold under agreements to repurchase $ 129,853 $ 77,780 $ 31,851 $ 40,752 $ 280,236 Securities loaned 8,564 6,602 1,473 2,153 18,792 Other 14,448 — — — 14,448 Total $ 152,865 $ 84,382 $ 33,324 $ 42,905 $ 313,476 (1) No agreements have maturities greater than three years . Class of Collateral Pledged Securities Sold Under Agreements to Repurchase Securities Loaned Other Total (Dollars in millions) December 31, 2017 U.S. government and agency securities $ 158,299 $ — $ 409 $ 158,708 Corporate securities, trading loans and other 12,787 2,669 624 16,080 Equity securities 23,975 13,523 21,628 59,126 Non-U.S. sovereign debt 90,857 5,495 50 96,402 Mortgage trading loans and ABS 4,977 — — 4,977 Total $ 290,895 $ 21,687 $ 22,711 $ 335,293 December 31, 2016 U.S. government and agency securities $ 153,184 $ — $ 70 $ 153,254 Corporate securities, trading loans and other 11,086 1,630 127 12,843 Equity securities 24,007 11,175 14,196 49,378 Non-U.S. sovereign debt 84,171 5,987 55 90,213 Mortgage trading loans and ABS 7,788 — — 7,788 Total $ 280,236 $ 18,792 $ 14,448 $ 313,476
Securities Loaned and Financial Assets Sold Under Agreements to Repurchase
Offsetting Liabilities [Line Items]
Offsetting Liabilities	Securities Financing Agreements Gross Assets/Liabilities (1) Amounts Offset Net Balance Sheet Amount Financial Instruments (2) Net Assets/Liabilities (Dollars in millions) December 31, 2017 Securities borrowed or purchased under agreements to resell (3) $ 348,472 $ (135,725 ) $ 212,747 $ (165,720 ) $ 47,027 Securities loaned or sold under agreements to repurchase $ 312,582 $ (135,725 ) $ 176,857 $ (146,205 ) $ 30,652 Other (4) 22,711 — 22,711 (22,711 ) — Total $ 335,293 $ (135,725 ) $ 199,568 $ (168,916 ) $ 30,652 December 31, 2016 Securities borrowed or purchased under agreements to resell (3) $ 326,970 $ (128,746 ) $ 198,224 $ (154,974 ) $ 43,250 Securities loaned or sold under agreements to repurchase $ 299,028 $ (128,746 ) $ 170,282 $ (140,774 ) $ 29,508 Other (4) 14,448 — 14,448 (14,448 ) — Total $ 313,476 $ (128,746 ) $ 184,730 $ (155,222 ) $ 29,508 (1) Includes activity where uncertainty exists as to the enforceability of certain master netting agreements under bankruptcy laws in some countries or industries. (2) Includes securities collateral received or pledged under repurchase or securities lending agreements where there is a legally enforceable master netting agreement. These amounts are not offset on the Consolidated Balance Sheet, but are shown as a reduction to derive a net asset or liability. Securities collateral received or pledged where the legal enforceability of the master netting agreements is uncertain is excluded from the table. (3) Excludes repurchase activity of $10.2 billion and $10.1 billion reported in loans and leases on the Consolidated Balance Sheet at December 31, 2017 and 2016 . (4) Balance is reported in accrued expenses and other liabilities on the Consolidated Balance Sheet and relates to transactions where the Corporation acts as the lender in a securities lending agreement and receives securities that can be pledged as collateral or sold. In these transactions, the Corporation recognizes an asset at fair value, representing the securities received, and a liability, representing the obligation to return those securities.
Securities Borrowed and Securities Purchased Under Agreements to Resell
Offsetting Assets [Line Items]
Offsetting Assets	Securities Financing Agreements Gross Assets/Liabilities (1) Amounts Offset Net Balance Sheet Amount Financial Instruments (2) Net Assets/Liabilities (Dollars in millions) December 31, 2017 Securities borrowed or purchased under agreements to resell (3) $ 348,472 $ (135,725 ) $ 212,747 $ (165,720 ) $ 47,027 Securities loaned or sold under agreements to repurchase $ 312,582 $ (135,725 ) $ 176,857 $ (146,205 ) $ 30,652 Other (4) 22,711 — 22,711 (22,711 ) — Total $ 335,293 $ (135,725 ) $ 199,568 $ (168,916 ) $ 30,652 December 31, 2016 Securities borrowed or purchased under agreements to resell (3) $ 326,970 $ (128,746 ) $ 198,224 $ (154,974 ) $ 43,250 Securities loaned or sold under agreements to repurchase $ 299,028 $ (128,746 ) $ 170,282 $ (140,774 ) $ 29,508 Other (4) 14,448 — 14,448 (14,448 ) — Total $ 313,476 $ (128,746 ) $ 184,730 $ (155,222 ) $ 29,508 (1) Includes activity where uncertainty exists as to the enforceability of certain master netting agreements under bankruptcy laws in some countries or industries. (2) Includes securities collateral received or pledged under repurchase or securities lending agreements where there is a legally enforceable master netting agreement. These amounts are not offset on the Consolidated Balance Sheet, but are shown as a reduction to derive a net asset or liability. Securities collateral received or pledged where the legal enforceability of the master netting agreements is uncertain is excluded from the table. (3) Excludes repurchase activity of $10.2 billion and $10.1 billion reported in loans and leases on the Consolidated Balance Sheet at December 31, 2017 and 2016 . (4) Balance is reported in accrued expenses and other liabilities on the Consolidated Balance Sheet and relates to transactions where the Corporation acts as the lender in a securities lending agreement and receives securities that can be pledged as collateral or sold. In these transactions, the Corporation recognizes an asset at fair value, representing the securities received, and a liability, representing the obligation to return those securities.

Long-term Debt (Tables)

Long-term Debt (Tables)	12 Months Ended
	Dec. 31, 2017
Debt Disclosure [Abstract]
Balance of Long-term Debt	The table below presents the balance of long-term debt at December 31, 2017 and 2016 , and the related contractual rates and maturity dates as of December 31, 2017 . December 31 (Dollars in millions) 2017 2016 Notes issued by Bank of America Corporation Senior notes: Fixed, with a weighted-average rate of 3.64%, ranging from 0.39% to 8.40%, due 2018 to 2048 $ 119,548 $ 108,933 Floating, with a weighted-average rate of 1.54%, ranging from 0.04% to 6.13%, due 2018 to 2044 21,048 13,164 Senior structured notes 15,460 17,049 Subordinated notes: Fixed, with a weighted-average rate of 4.90%, ranging from 2.94% to 8.57%, due 2018 to 2045 22,004 26,047 Floating, with a weighted-average rate of 1.00%, ranging from 0.20% to 2.56%, due 2018 to 2026 4,058 4,350 Junior subordinated notes (related to trust preferred securities): Fixed, with a weighted-average rate of 6.91%, ranging from 5.25% to 8.05%, due 2027 to 2067 3,282 3,280 Floating, with a weighted-average rate of 2.13%, ranging from 1.91% to 2.60%, due 2027 to 2056 553 552 Total notes issued by Bank of America Corporation 185,953 173,375 Notes issued by Bank of America, N.A. Senior notes: Fixed, with a weighted-average rate of 1.78%, ranging from 0.02% to 2.05%, due in 2018 4,686 5,936 Floating, with a weighted-average rate of 2.60%, ranging from 1.44% to 2.80%, due 2018 to 2041 1,033 3,383 Subordinated notes: Fixed, with a rate of 6.00%, due in 2036 1,679 4,424 Floating, with a rate of 1.33%, due in 2019 1 598 Advances from Federal Home Loan Banks: Fixed, with a weighted-average rate of 5.22%, ranging from 0.01% to 7.72%, due 2018 to 2034 146 162 Floating, with a weighted-average rate of 1.42%, ranging from 1.35% to 1.60%, due 2018 to 2019 5,000 — Securitizations and other BANA VIEs (1) 8,641 9,164 Other 432 3,084 Total notes issued by Bank of America, N.A. 21,618 26,751 Other debt Structured liabilities 18,574 15,171 Nonbank VIEs (1) 1,232 1,482 Other 25 44 Total other debt 19,831 16,697 Total long-term debt $ 227,402 $ 216,823 (1) Represents the total long-term debt included in the liabilities of consolidated VIEs on the Consolidated Balance Sheet.
Schedule of Maturities of Long-term Debt	The following table shows the carrying value for aggregate annual contractual maturities of long-term debt as of December 31, 2017 . Included in the table are certain structured notes issued by the Corporation that contain provisions whereby the borrowings are redeemable at the option of the holder (put options) at specified dates prior to maturity. Other structured notes have coupon or repayment terms linked to the performance of debt or equity securities, indices, currencies or commodities, and the maturity may be accelerated based on the value of a referenced index or security. In both cases, the Corporation or a subsidiary may be required to settle the obligation for cash or other securities prior to the contractual maturity date. These borrowings are reflected in the table as maturing at their contractual maturity date. During 2017 , the Corporation had total long-term debt maturities and redemptions in the aggregate of $48.8 billion consisting of $29.1 billion for Bank of America Corporation, $13.3 billion for Bank of America, N.A. and $6.4 billion of other debt. During 2016 , the Corporation had total long-term debt maturities and redemptions in the aggregate of $51.6 billion consisting of $30.6 billion for Bank of America Corporation, $11.6 billion for Bank of America, N.A. and $9.4 billion of other debt. In December 2017, pursuant to a private offering, the Corporation exchanged $11.0 billion of outstanding long-term debt for new fixed/floating-rate senior notes, subject to certain terms and conditions. Based on the attributes of the exchange transactions, the newly issued securities are not considered substantially different , for accounting purposes, from the exchanged securities. Therefore, there was no impact to the Corporation’s results of operations as any amounts paid to debt holders were capitalized, and the premiums or discounts on the outstanding long-term debt were carried over to the new securities and will be amortized over their contractual lives using a revised effective interest rate. Long-term Debt by Maturity (Dollars in millions) 2018 2019 2020 2021 2022 Thereafter Total Bank of America Corporation Senior notes $ 19,577 $ 15,115 $ 10,580 $ 16,196 $ 9,691 $ 69,437 $ 140,596 Senior structured notes 2,749 1,486 950 437 2,017 7,821 15,460 Subordinated notes 2,973 1,552 — 375 476 20,686 26,062 Junior subordinated notes — — — — — 3,835 3,835 Total Bank of America Corporation 25,299 18,153 11,530 17,008 12,184 101,779 185,953 Bank of America, N.A. Senior notes 5,699 — — — — 20 5,719 Subordinated notes — 1 — — — 1,679 1,680 Advances from Federal Home Loan Banks 3,009 2,013 11 2 3 108 5,146 Securitizations and other Bank VIEs (1) 2,300 3,200 3,098 — — 43 8,641 Other 51 194 15 — 9 163 432 Total Bank of America, N.A. 11,059 5,408 3,124 2 12 2,013 21,618 Other debt Structured liabilities 5,677 2,340 1,545 870 803 7,339 18,574 Nonbank VIEs (1) 22 45 — — — 1,165 1,232 Other — — — — — 25 25 Total other debt 5,699 2,385 1,545 870 803 8,529 19,831 Total long-term debt $ 42,057 $ 25,946 $ 16,199 $ 17,880 $ 12,999 $ 112,321 $ 227,402 (1) Represents the total long-term debt included in the liabilities of consolidated VIEs on the Consolidated Balance Sheet.
Financial Instruments Subject to Mandatory Redemption Disclosure	The Trust Securities Summary table details the outstanding Trust Securities and the related Notes previously issued which remained outstanding at December 31, 2017 . Trust Securities Summary (Dollars in millions) Issuer Issuance Date Aggregate Principal Amount of Trust Securities Aggregate Principal Amount of the Notes Stated Maturity of the Trust Securities Per Annum Interest Rate of the Notes Interest Payment Dates Redemption Period December 31, 2017 Bank of America Capital Trust VI March 2005 $ 27 $ 27 March 2035 5.63 % Semi-Annual Any time Capital Trust VII (1) August 2005 6 6 August 2035 5.25 Semi-Annual Any time Capital Trust XI May 2006 658 678 May 2036 6.63 Semi-Annual Any time Capital Trust XV May 2007 1 1 June 2056 3-mo. LIBOR + 80 bps Quarterly On or after 6/01/37 NationsBank Capital Trust III February 1997 131 135 January 2027 3-mo. LIBOR + 55 bps Quarterly On or after 1/15/07 BankAmerica Capital III January 1997 103 105 January 2027 3-mo. LIBOR + 57 bps Quarterly On or after 1/15/02 Fleet Capital Trust V December 1998 79 82 December 2028 3-mo. LIBOR + 100 bps Quarterly On or after 12/18/03 BankBoston Capital Trust III June 1997 53 55 June 2027 3-mo. LIBOR + 75 bps Quarterly On or after 6/15/07 Capital Trust IV June 1998 102 106 June 2028 3-mo. LIBOR + 60 bps Quarterly On or after 6/08/03 MBNA Capital Trust B January 1997 70 73 February 2027 3-mo. LIBOR + 80 bps Quarterly On or after 2/01/07 Countrywide Capital III June 1997 200 206 June 2027 8.05 Semi-Annual Only under special event Capital V November 2006 1,495 1,496 November 2036 7.00 Quarterly On or after 11/01/11 Merrill Lynch Capital Trust I December 2006 1,050 1,051 December 2066 6.45 Quarterly On or after 12/11 Capital Trust III August 2007 750 751 September 2067 7.375 Quarterly On or after 9/12 Total $ 4,725 $ 4,772 (1) Notes are denominated in British pound. Presentation currency is U.S. dollar.

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2017
Commitments and Contingencies Disclosure [Abstract]
Schedule of Credit Extension Commitment Expirations	The following table also includes the notional amount of commitments of $4.8 billion and $7.0 billion at December 31, 2017 and 2016 that are accounted for under the fair value option. However, the following table excludes cumulative net fair value of $120 million and $173 million on these commitments, which is classified in accrued expenses and other liabilities. For more information regarding the Corporation’s loan commitments accounted for under the fair value option, see Note 21 – Fair Value Option . Credit Extension Commitments Expire in One Expire After One Expire After Three Years Through Five Years Expire After Five Total (Dollars in millions) December 31, 2017 Notional amount of credit extension commitments Loan commitments $ 85,804 $ 140,942 $ 147,043 $ 21,342 $ 395,131 Home equity lines of credit 6,172 4,457 2,288 31,250 44,167 Standby letters of credit and financial guarantees (1) 19,976 11,261 3,420 1,144 35,801 Letters of credit 1,291 117 129 87 1,624 Legally binding commitments 113,243 156,777 152,880 53,823 476,723 Credit card lines (2) 362,030 — — — 362,030 Total credit extension commitments $ 475,273 $ 156,777 $ 152,880 $ 53,823 $ 838,753 December 31, 2016 Notional amount of credit extension commitments Loan commitments $ 82,609 $ 133,063 $ 152,854 $ 22,129 $ 390,655 Home equity lines of credit 8,806 10,701 2,644 25,050 47,201 Standby letters of credit and financial guarantees (1) 19,165 10,754 3,225 1,027 34,171 Letters of credit 1,285 103 114 53 1,555 Legally binding commitments 111,865 154,621 158,837 48,259 473,582 Credit card lines (2) 377,773 — — — 377,773 Total credit extension commitments $ 489,638 $ 154,621 $ 158,837 $ 48,259 $ 851,355 (1) The notional amounts of SBLCs and financial guarantees classified as investment grade and non-investment grade based on the credit quality of the underlying reference name within the instrument were $27.3 billion and $8.1 billion at December 31, 2017 , and $25.5 billion and $8.3 billion at December 31, 2016 . Amounts in the table include consumer SBLCs of $421 million and $376 million at December 31, 2017 and 2016 . (2) Includes business card unused lines of credit.

Shareholders' Equity (Tables)

Shareholders' Equity (Tables)	12 Months Ended
	Dec. 31, 2017
Equity [Abstract]
Schedule of Dividends	Declared Quarterly Cash Dividends on Common Stock (1) Declaration Date Record Date Payment Date Dividend Per Share January 31, 2018 March 2, 2018 March 30, 2018 $ 0.12 October 25, 2017 December 1, 2017 December 29, 2017 0.12 July 26, 2017 September 1, 2017 September 29, 2017 0.12 April 26, 2017 June 2, 2017 June 30, 2017 0.075 January 26, 2017 March 3, 2017 March 31, 2017 0.075 (1) In 2017 and through February 22, 2018 .
Schedule of Stock by Class	Preferred Stock Summary (Dollars in millions, except as noted) Series Description Initial Total Liquidation Carrying (1) Per Annum Redemption Period (2) Series B 7% Cumulative Redeemable June 7,110 $ 100 $ 1 7.00 % n/a Series D (3) 6.204% Non-Cumulative September 26,174 25,000 654 6.204 % On or after Series E (3) Floating Rate Non-Cumulative November 12,691 25,000 317 3-mo. LIBOR + 35 bps (4) On or after Series F Floating Rate Non-Cumulative March 1,409 100,000 141 3-mo. LIBOR + 40 bps (4) On or after Series G Adjustable Rate Non-Cumulative March 4,926 100,000 493 3-mo. LIBOR + 40 bps (4) On or after Series I (3) 6.625% Non-Cumulative September 14,584 25,000 365 6.625 % On or after Series K (5) Fixed-to-Floating Rate Non-Cumulative January 61,773 25,000 1,544 8.00% to, but excluding, 1/30/18; 3-mo. LIBOR + 363 bps thereafter On or after Series L 7.25% Non-Cumulative Perpetual Convertible January 3,080,182 1,000 3,080 7.25 % n/a Series M (5) Fixed-to-Floating Rate Non-Cumulative April 52,399 25,000 1,310 8.125% to, but excluding, 5/15/18; 3-mo. LIBOR + 364 bps thereafter On or after Series T (6) 6% Non-cumulative September 354 100,000 35 6.00 % After May 7, 2019 Series U (5) Fixed-to-Floating Rate Non-Cumulative May 40,000 25,000 1,000 5.2% to, but excluding, 6/1/23; On or after Series V (5) Fixed-to-Floating Rate Non-Cumulative June 60,000 25,000 1,500 5.125% to, but excluding, 6/17/19; 3-mo. LIBOR + 338.7 bps thereafter On or after Series W (3) 6.625% Non-Cumulative September 2014 44,000 25,000 1,100 6.625 % On or after Series X (5) Fixed-to-Floating Rate Non-Cumulative September 2014 80,000 25,000 2,000 6.250% to, but excluding, 9/5/24; 3-mo. LIBOR + 370.5 bps thereafter On or after Series Y (3) 6.500% Non-Cumulative January 2015 44,000 25,000 1,100 6.500 % On or after Series Z (5) Fixed-to-Floating Rate Non-Cumulative October 2014 56,000 25,000 1,400 6.500% to, but excluding,10/23/24; 3-mo. LIBOR + 417.4 bps thereafter On or after Series AA (5) Fixed-to-Floating Rate Non-Cumulative March 2015 76,000 25,000 1,900 6.100% to, but excluding, 3/17/25; 3-mo. LIBOR + 389.8 bps thereafter On or after Series CC (3) 6.200% Non-Cumulative January 2016 44,000 25,000 1,100 6.200 % On or after Series DD (5) Fixed-to-Floating Rate Non-Cumulative March 2016 40,000 25,000 1,000 6.300% to, but excluding, 3/10/26; 3-mo. LIBOR + 455.3 bps thereafter On or after Series EE (3) 6.000% Non-Cumulative April 2016 36,000 25,000 900 6.000 % On or after Series 1 (7) Floating Rate Non-Cumulative November 3,275 30,000 98 3-mo. LIBOR + 75 bps (8) On or after Series 2 (7) Floating Rate Non-Cumulative March 9,967 30,000 299 3-mo. LIBOR + 65 bps (8) On or after Series 3 (7) 6.375% Non-Cumulative November 21,773 30,000 653 6.375 % On or after Series 4 (7) Floating Rate Non-Cumulative November 7,010 30,000 210 3-mo. LIBOR + 75 bps (4) On or after Series 5 (7) Floating Rate Non-Cumulative March 14,056 30,000 422 3-mo. LIBOR + 50 bps (4) On or after Total 3,837,683 $ 22,622 (1) Amounts shown are before third-party issuance costs and certain book value adjustments of $299 million . (2) The Corporation may redeem series of preferred stock on or after the redemption date, in whole or in part, at its option, at the liquidation preference plus declared and unpaid dividends. Series B and Series L Preferred Stock do not have early redemption/call rights. (3) Ownership is held in the form of depositary shares, each representing a 1/1,000th interest in a share of preferred stock, paying a quarterly cash dividend, if and when declared. (4) Subject to 4.00% minimum rate per annum. (5) Ownership is held in the form of depositary shares, each representing a 1/25th interest in a share of preferred stock, paying a semi-annual cash dividend, if and when declared, until the first redemption date at which time, it adjusts to a quarterly cash dividend, if and when declared, thereafter. (6) Represents shares that were not surrendered when the holders of Series T preferred stock exercised warrants to acquire 700 million shares of common stock in the third quarter of 2017. (7) Ownership is held in the form of depositary shares, each representing a 1/1,200th interest in a share of preferred stock, paying a quarterly cash dividend, if and when declared. (8) Subject to 3.00% minimum rate per annum. n/a = not applicable The following table summarizes common stock repurchases during 2017, 2016 and 2015. Common Stock Repurchase Summary (in millions) 2017 2016 2015 Total share repurchases, including CCAR capital plan repurchases 509 333 140 Purchase price of shares repurchased and retired (1) CCAR capital plan repurchases $ 9,347 $ 4,312 $ 2,374 Other authorized repurchases 3,467 800 — Total shares repurchased $ 12,814 $ 5,112 $ 2,374 (1) Represents reductions to shareholders’ equity due to common stock repurchases.

Accumulated Other Comprehensi46

Accumulated Other Comprehensive Income (Loss) (Tables)	12 Months Ended
	Dec. 31, 2017
Equity [Abstract]
Schedule of Accumulated OCI	The table below presents the changes in accumulated OCI after-tax for 2015 , 2016 and 2017 . (Dollars in millions) Debt Securities Available-for- Equity Securities Debit Valuation Adjustments Derivatives Employee Benefit Plans Foreign Currency (1) Total Balance, December 31, 2014 $ 1,641 $ 17 n/a $ (1,661 ) $ (3,350 ) $ (669 ) $ (4,022 ) Cumulative adjustment for accounting change — — $ (1,226 ) — — — (1,226 ) Net change (1,625 ) 45 615 584 394 (123 ) (110 ) Balance, December 31, 2015 $ 16 $ 62 $ (611 ) $ (1,077 ) $ (2,956 ) $ (792 ) $ (5,358 ) Net change (1,315 ) (30 ) (156 ) 182 (524 ) (87 ) (1,930 ) Balance, December 31, 2016 $ (1,299 ) $ 32 $ (767 ) $ (895 ) $ (3,480 ) $ (879 ) $ (7,288 ) Net change 91 (30 ) (293 ) 64 288 86 206 Balance, December 31, 2017 $ (1,208 ) $ 2 $ (1,060 ) $ (831 ) $ (3,192 ) $ (793 ) $ (7,082 )
Schedule of Amounts Recognized in Other Comprehensive Income (Loss)	The table below presents the net change in fair value recorded in accumulated OCI, net realized gains and losses reclassified into earnings and other changes for each component of OCI before- and after-tax for 2017 , 2016 and 2015 . Changes in OCI Components Before- and After-tax Before-tax Tax effect After- tax Before-tax Tax effect After- tax Before-tax Tax effect After- tax (Dollars in millions) 2017 2016 2015 Debt securities: Net increase in fair value $ 202 $ 26 $ 228 $ (1,645 ) $ 622 $ (1,023 ) $ (1,564 ) $ 595 $ (969 ) Reclassifications into earnings: Gains on sales of debt securities (255 ) 97 (158 ) (490 ) 186 (304 ) (1,138 ) 432 (706 ) Other income 41 (20 ) 21 19 (7 ) 12 81 (31 ) 50 Net realized gains reclassified into earnings (214 ) 77 (137 ) (471 ) 179 (292 ) (1,057 ) 401 (656 ) Net change (12 ) 103 91 (2,116 ) 801 (1,315 ) (2,621 ) 996 (1,625 ) Available-for-sale marketable equity securities: Net increase (decrease) in fair value 38 (12 ) 26 (49 ) 19 (30 ) 72 (27 ) 45 Net realized gains reclassified into earnings (2) (90 ) 34 (56 ) — — — — — — Net change (52 ) 22 (30 ) (49 ) 19 (30 ) 72 (27 ) 45 Debit valuation adjustments: Net increase (decrease) in fair value (490 ) 171 (319 ) (271 ) 104 (167 ) 436 (166 ) 270 Net realized losses reclassified into earnings (2) 42 (16 ) 26 17 (6 ) 11 556 (211 ) 345 Net change (448 ) 155 (293 ) (254 ) 98 (156 ) 992 (377 ) 615 Derivatives: Net increase (decrease) in fair value (50 ) 1 (49 ) (299 ) 113 (186 ) 55 (22 ) 33 Reclassifications into earnings: Net interest income 327 (122 ) 205 553 (205 ) 348 974 (367 ) 607 Personnel (148 ) 56 (92 ) 32 (12 ) 20 (91 ) 35 (56 ) Net realized losses reclassified into earnings 179 (66 ) 113 585 (217 ) 368 883 (332 ) 551 Net change 129 (65 ) 64 286 (104 ) 182 938 (354 ) 584 Employee benefit plans: Net increase (decrease) in fair value 223 (55 ) 168 (921 ) 329 (592 ) 408 (121 ) 287 Reclassifications into earnings: Prior service cost 4 (1 ) 3 5 (2 ) 3 5 (2 ) 3 Net actuarial losses 175 (60 ) 115 92 (34 ) 58 164 (60 ) 104 Net realized losses reclassified into earnings (3) 179 (61 ) 118 97 (36 ) 61 169 (62 ) 107 Settlements, curtailments and other 3 (1 ) 2 15 (8 ) 7 1 (1 ) — Net change 405 (117 ) 288 (809 ) 285 (524 ) 578 (184 ) 394 Foreign currency: Net increase (decrease) in fair value (439 ) 430 (9 ) 514 (601 ) (87 ) 600 (723 ) (123 ) Net realized gains reclassified into earnings (1,2) (606 ) 701 95 — — — (38 ) 38 — Net change (1,045 ) 1,131 86 514 (601 ) (87 ) 562 (685 ) (123 ) Total other comprehensive income (loss) $ (1,023 ) $ 1,229 $ 206 $ (2,428 ) $ 498 $ (1,930 ) $ 521 $ (631 ) $ (110 ) (1) During 2017 , foreign currency included a pre-tax gain on derivatives and related income tax expense associated with the Corporation’s net investment in its non-U.S. consumer credit card business, which was sold in 2017. The derivative gain was partially offset by a loss on the related foreign currency translation adjustment. (2) Reclassifications of pre-tax AFS marketable equity securities, DVA and foreign currency are recorded in other income in the Consolidated Statement of Income. (3) Reclassifications of pre-tax employee benefit plan costs are recorded in personnel expense in the Consolidated Statement of Income. n/a = not applicable

Earnings Per Common Share (Tabl

Earnings Per Common Share (Tables)	12 Months Ended
	Dec. 31, 2017
Earnings Per Share [Abstract]
Calculation of earnings per common share and diluted earnings per common share	The calculation of EPS and diluted EPS for 2017 , 2016 and 2015 is presented below. For more information on the calculation of EPS, see Note 1 – Summary of Significant Accounting Principles . (Dollars in millions, except per share information; shares in thousands) 2017 2016 2015 Earnings per common share Net income $ 18,232 $ 17,822 $ 15,910 Preferred stock dividends (1,614 ) (1,682 ) (1,483 ) Net income applicable to common shareholders $ 16,618 $ 16,140 $ 14,427 Average common shares issued and outstanding 10,195,646 10,284,147 10,462,282 Earnings per common share $ 1.63 $ 1.57 $ 1.38 Diluted earnings per common share Net income applicable to common shareholders $ 16,618 $ 16,140 $ 14,427 Add preferred stock dividends due to assumed conversions (1) 186 300 300 Net income allocated to common shareholders $ 16,804 $ 16,440 $ 14,727 Average common shares issued and outstanding 10,195,646 10,284,147 10,462,282 Dilutive potential common shares (2) 582,782 762,659 773,948 Total diluted average common shares issued and outstanding 10,778,428 11,046,806 11,236,230 Diluted earnings per common share $ 1.56 $ 1.49 $ 1.31 (1) Represents the Series T dividends under the “if-converted” method prior to conversion. (2) Includes incremental dilutive shares from RSUs, restricted stock and warrants.

Regulatory Requirements and R48

Regulatory Requirements and Restrictions (Tables)	12 Months Ended
	Dec. 31, 2017
Banking and Thrift [Abstract]
Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations	The following table presents capital ratios and related information in accordance with Basel 3 Standardized and Advanced approaches – Transition as measured at December 31, 2017 and 2016 for the Corporation and BANA. Regulatory Capital under Basel 3 – Transition (1) Bank of America Corporation Bank of America, N.A. Standardized Approach Advanced Approaches Regulatory Minimum (2) Standardized Approach Advanced Approaches Regulatory Minimum (3) (Dollars in millions, except as noted) December 31, 2017 Risk-based capital metrics: Common equity tier 1 capital $ 171,063 $ 171,063 $ 150,552 $ 150,552 Tier 1 capital 191,496 191,496 150,552 150,552 Total capital (4) 227,427 218,529 163,243 154,675 Risk-weighted assets (in billions) (5) 1,434 1,449 1,201 1,007 Common equity tier 1 capital ratio 11.9 % 11.8 % 7.25 % 12.5 % 14.9 % 6.5 % Tier 1 capital ratio 13.4 13.2 8.75 12.5 14.9 8.0 Total capital ratio 15.9 15.1 10.75 13.6 15.4 10.0 Leverage-based metrics: Adjusted quarterly average assets (in billions) (6) $ 2,224 $ 2,224 $ 1,672 $ 1,672 Tier 1 leverage ratio 8.6 % 8.6 % 4.0 9.0 % 9.0 % 5.0 December 31, 2016 Risk-based capital metrics: Common equity tier 1 capital $ 168,866 $ 168,866 $ 149,755 $ 149,755 Tier 1 capital 190,315 190,315 149,755 149,755 Total capital (4) 228,187 218,981 163,471 154,697 Risk-weighted assets (in billions) 1,399 1,530 1,176 1,045 Common equity tier 1 capital ratio 12.1 % 11.0 % 5.875 % 12.7 % 14.3 % 6.5 % Tier 1 capital ratio 13.6 12.4 7.375 12.7 14.3 8.0 Total capital ratio 16.3 14.3 9.375 13.9 14.8 10.0 Leverage-based metrics: Adjusted quarterly average assets (in billions) (6) $ 2,131 $ 2,131 $ 1,611 $ 1,611 Tier 1 leverage ratio 8.9 % 8.9 % 4.0 9.3 % 9.3 % 5.0 (1) Under the applicable bank regulatory rules, the Corporation is not required to and, accordingly, will not restate previously-filed regulatory capital metrics and ratios in connection with the change in accounting method as described in Note 1 – Summary of Significant Accounting Principles . Therefore, the December 31, 2016 amounts in the table are as originally reported. The cumulative impact of the change in accounting method resulted in an insignificant pro forma change to the Corporation’s capital metrics and ratios. (2) The December 31, 2017 and 2016 amounts include a transition capital conservation buffer of 1.25 percent and 0.625 percent and a transition global systemically important bank surcharge of 1.5 percent and 0.75 percent . The countercyclical capital buffer for both periods is zero . (3) Percentage required to meet guidelines to be considered “well capitalized” under the PCA framework. (4) Total capital under the Advanced approaches differs from the Standardized approach due to differences in the amount permitted in Tier 2 capital related to the qualifying allowance for credit losses. (5) During the fourth quarter of 2017, the Corporation obtained approval from U.S. banking regulators to use its Internal Models Methodology to calculate counterparty credit risk-weighted assets for derivatives under the Advanced approaches. (6) Reflects adjusted average total assets for the three months ended December 31, 2017 and 2016 .

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables)	12 Months Ended
	Dec. 31, 2017
Retirement Benefits [Abstract]
Schedule of Defined Benefit Plans Disclosures	The Pension and Postretirement Plans table summarizes the changes in the fair value of plan assets, changes in the projected benefit obligation (PBO), the funded status of both the accumulated benefit obligation (ABO) and the PBO, and the weighted-average assumptions used to determine benefit obligations for the pension plans and postretirement plans at December 31, 2017 and 2016 . The estimate of the Corporation’s PBO associated with these plans considers various actuarial assumptions, including assumptions for mortality rates and discount rates. The discount rate assumptions are derived from a cash flow matching technique that utilizes rates that are based on Aa-rated corporate bonds with cash flows that match estimated benefit payments of each of the plans. The decreases in the weighted-average discount rate in 2017 and 2016 resulted in increases to the PBO of approximately $1.1 billion and $1.3 billion at December 31, 2017 and 2016 . Pension and Postretirement Plans (1) Qualified Pension Plan Non-U.S. Pension Plans Nonqualified and Other Pension Plans Postretirement Health and Life Plans (Dollars in millions) 2017 2016 2017 2016 2017 2016 2017 2016 Change in fair value of plan assets Fair value, January 1 $ 18,239 $ 17,962 $ 2,789 $ 2,738 $ 2,744 $ 2,805 $ — $ — Actual return on plan assets 2,285 1,075 118 541 128 74 — — Company contributions — — 23 48 98 104 393 104 Plan participant contributions — — 1 1 — — 125 125 Settlements and curtailments — — (190 ) (20 ) — (6 ) — — Benefits paid (816 ) (798 ) (54 ) (118 ) (246 ) (233 ) (230 ) (242 ) Federal subsidy on benefits paid n/a n/a n/a n/a n/a n/a 12 13 Foreign currency exchange rate changes n/a n/a 256 (401 ) n/a n/a n/a n/a Fair value, December 31 $ 19,708 $ 18,239 $ 2,943 $ 2,789 $ 2,724 $ 2,744 $ 300 $ — Change in projected benefit obligation Projected benefit obligation, January 1 $ 14,982 $ 14,461 $ 2,763 $ 2,580 $ 3,047 $ 3,053 $ 1,125 $ 1,152 Service cost — — 24 25 1 — 6 7 Interest cost 606 634 72 86 117 127 43 47 Plan participant contributions — — 1 1 — — 125 125 Plan amendments — — — — — — (19 ) — Settlements and curtailments — — (200 ) (31 ) — (6 ) — — Actuarial loss (gain) 934 685 (26 ) 535 128 106 (7 ) 25 Benefits paid (816 ) (798 ) (54 ) (118 ) (246 ) (233 ) (230 ) (242 ) Federal subsidy on benefits paid n/a n/a n/a n/a n/a n/a 12 13 Foreign currency exchange rate changes n/a n/a 234 (315 ) n/a n/a 1 (2 ) Projected benefit obligation, December 31 $ 15,706 $ 14,982 $ 2,814 $ 2,763 $ 3,047 $ 3,047 $ 1,056 $ 1,125 Amounts recognized on Consolidated Balance Sheet Other assets $ 4,002 $ 3,257 $ 610 $ 475 $ 730 $ 760 $ — $ — Accrued expenses and other liabilities — — (481 ) (449 ) (1,053 ) (1,063 ) (756 ) (1,125 ) Net amount recognized, December 31 $ 4,002 $ 3,257 $ 129 $ 26 $ (323 ) $ (303 ) $ (756 ) $ (1,125 ) Funded status, December 31 Accumulated benefit obligation $ 15,706 $ 14,982 $ 2,731 $ 2,645 $ 3,046 $ 3,046 n/a n/a Overfunded (unfunded) status of ABO 4,002 3,257 212 144 (322 ) (302 ) n/a n/a Provision for future salaries — — 83 118 1 1 n/a n/a Projected benefit obligation 15,706 14,982 2,814 2,763 3,047 3,047 $ 1,056 $ 1,125 Weighted-average assumptions, December 31 Discount rate 3.68 % 4.16 % 2.39 % 2.56 % 3.58 % 4.01 % 3.58 % 3.99 % Rate of compensation increase n/a n/a 4.31 4.51 4.00 4.00 n/a n/a (1) The measurement date for the Qualified Pension Plan, Non-U.S. Pension Plans, Nonqualified and Other Pension Plans, and Postretirement Health and Life Plans was December 31 of each year reported. n/a = not applicable
Schedule of Amounts Recognized in Balance Sheet	Pension and Postretirement Plans (1) Qualified Pension Plan Non-U.S. Pension Plans Nonqualified and Other Pension Plans Postretirement Health and Life Plans (Dollars in millions) 2017 2016 2017 2016 2017 2016 2017 2016 Change in fair value of plan assets Fair value, January 1 $ 18,239 $ 17,962 $ 2,789 $ 2,738 $ 2,744 $ 2,805 $ — $ — Actual return on plan assets 2,285 1,075 118 541 128 74 — — Company contributions — — 23 48 98 104 393 104 Plan participant contributions — — 1 1 — — 125 125 Settlements and curtailments — — (190 ) (20 ) — (6 ) — — Benefits paid (816 ) (798 ) (54 ) (118 ) (246 ) (233 ) (230 ) (242 ) Federal subsidy on benefits paid n/a n/a n/a n/a n/a n/a 12 13 Foreign currency exchange rate changes n/a n/a 256 (401 ) n/a n/a n/a n/a Fair value, December 31 $ 19,708 $ 18,239 $ 2,943 $ 2,789 $ 2,724 $ 2,744 $ 300 $ — Change in projected benefit obligation Projected benefit obligation, January 1 $ 14,982 $ 14,461 $ 2,763 $ 2,580 $ 3,047 $ 3,053 $ 1,125 $ 1,152 Service cost — — 24 25 1 — 6 7 Interest cost 606 634 72 86 117 127 43 47 Plan participant contributions — — 1 1 — — 125 125 Plan amendments — — — — — — (19 ) — Settlements and curtailments — — (200 ) (31 ) — (6 ) — — Actuarial loss (gain) 934 685 (26 ) 535 128 106 (7 ) 25 Benefits paid (816 ) (798 ) (54 ) (118 ) (246 ) (233 ) (230 ) (242 ) Federal subsidy on benefits paid n/a n/a n/a n/a n/a n/a 12 13 Foreign currency exchange rate changes n/a n/a 234 (315 ) n/a n/a 1 (2 ) Projected benefit obligation, December 31 $ 15,706 $ 14,982 $ 2,814 $ 2,763 $ 3,047 $ 3,047 $ 1,056 $ 1,125 Amounts recognized on Consolidated Balance Sheet Other assets $ 4,002 $ 3,257 $ 610 $ 475 $ 730 $ 760 $ — $ — Accrued expenses and other liabilities — — (481 ) (449 ) (1,053 ) (1,063 ) (756 ) (1,125 ) Net amount recognized, December 31 $ 4,002 $ 3,257 $ 129 $ 26 $ (323 ) $ (303 ) $ (756 ) $ (1,125 ) Funded status, December 31 Accumulated benefit obligation $ 15,706 $ 14,982 $ 2,731 $ 2,645 $ 3,046 $ 3,046 n/a n/a Overfunded (unfunded) status of ABO 4,002 3,257 212 144 (322 ) (302 ) n/a n/a Provision for future salaries — — 83 118 1 1 n/a n/a Projected benefit obligation 15,706 14,982 2,814 2,763 3,047 3,047 $ 1,056 $ 1,125 Weighted-average assumptions, December 31 Discount rate 3.68 % 4.16 % 2.39 % 2.56 % 3.58 % 4.01 % 3.58 % 3.99 % Rate of compensation increase n/a n/a 4.31 4.51 4.00 4.00 n/a n/a (1) The measurement date for the Qualified Pension Plan, Non-U.S. Pension Plans, Nonqualified and Other Pension Plans, and Postretirement Health and Life Plans was December 31 of each year reported. n/a = not applicable
Schedule of Accumulated Benefit Obligations in Excess of Fair Value of Plan Assets	Pension Plans with ABO and PBO in excess of plan assets as of December 31, 2017 and 2016 are presented in the table below. For these plans, funding strategies vary due to legal requirements and local practices. Plans with PBO and ABO in Excess of Plan Assets Non-U.S. Pension Plans Nonqualified and Other Pension Plans (Dollars in millions) 2017 2016 2017 2016 PBO $ 671 $ 626 $ 1,054 $ 1,065 ABO 644 594 1,053 1,064 Fair value of plan assets 191 179 1 1
Schedule of Benefit Obligations in Excess of Fair Value of Plan Assets	Pension Plans with ABO and PBO in excess of plan assets as of December 31, 2017 and 2016 are presented in the table below. For these plans, funding strategies vary due to legal requirements and local practices. Plans with PBO and ABO in Excess of Plan Assets Non-U.S. Pension Plans Nonqualified and Other Pension Plans (Dollars in millions) 2017 2016 2017 2016 PBO $ 671 $ 626 $ 1,054 $ 1,065 ABO 644 594 1,053 1,064 Fair value of plan assets 191 179 1 1
Schedule of Net Benefit Costs	Components of Net Periodic Benefit Cost Qualified Pension Plan Non-U.S. Pension Plans (Dollars in millions) 2017 2016 2015 2017 2016 2015 Components of net periodic benefit cost (income) Service cost $ — $ — $ — $ 24 $ 25 $ 27 Interest cost 606 634 621 72 86 93 Expected return on plan assets (1,068 ) (1,038 ) (1,045 ) (136 ) (123 ) (133 ) Amortization of net actuarial loss 154 139 170 8 6 6 Other — — — (7 ) 2 1 Net periodic benefit cost (income) $ (308 ) $ (265 ) $ (254 ) $ (39 ) $ (4 ) $ (6 ) Weighted-average assumptions used to determine net cost for years ended December 31 Discount rate 4.16 % 4.51 % 4.12 % 2.56 % 3.59 % 3.56 % Expected return on plan assets 6.00 6.00 6.00 4.73 4.84 5.27 Rate of compensation increase n/a n/a n/a 4.51 4.67 4.70 Nonqualified and Postretirement Health (Dollars in millions) 2017 2016 2015 2017 2016 2015 Components of net periodic benefit cost (income) Service cost $ 1 $ — $ — $ 6 $ 7 $ 8 Interest cost 117 127 122 43 47 48 Expected return on plan assets (95 ) (101 ) (92 ) — — (1 ) Amortization of net actuarial loss (gain) 34 25 34 (21 ) (81 ) (46 ) Other — 3 — 4 4 4 Net periodic benefit cost (income) $ 57 $ 54 $ 64 $ 32 $ (23 ) $ 13 Weighted-average assumptions used to determine net cost for years ended December 31 Discount rate 4.01 % 4.34 % 3.80 % 3.99 % 4.32 % 3.75 % Expected return on plan assets 3.50 3.66 3.26 n/a n/a 6.00 Rate of compensation increase 4.00 4.00 4.00 n/a n/a n/a n/a = not applicable
Schedule of Pretax Amounts Included in Accumulated OCI	Pretax Amounts Included in Accumulated OCI Qualified Pension Plan Non-U.S. Pension Plans Nonqualified and Other Pension Plans Postretirement Health and Life Plans Total (Dollars in millions) 2017 2016 2017 2016 2017 2016 2017 2016 2017 2016 Net actuarial loss (gain) $ 3,992 $ 4,429 $ 196 $ 216 $ 1,014 $ 953 $ (30 ) $ (44 ) $ 5,172 $ 5,554 Prior service cost (credits) — — 4 4 — — (11 ) 12 (7 ) 16 Amounts recognized in accumulated OCI $ 3,992 $ 4,429 $ 200 $ 220 $ 1,014 $ 953 $ (41 ) $ (32 ) $ 5,165 $ 5,570
Schedule of Pretax Amounts Recognized in OCI	Pretax Amounts Recognized in OCI Qualified Pension Plan Non-U.S. Pension Plans Nonqualified Pension Plans Postretirement Life Plans Total (1) (Dollars in millions) 2017 2016 2017 2016 2017 2016 2017 2016 2017 2016 Current year actuarial loss (gain) $ (283 ) $ 648 $ (12 ) $ 100 $ 95 $ 133 $ (7 ) $ 25 $ (207 ) $ 906 Amortization of actuarial gain (loss) (154 ) (139 ) (8 ) (6 ) (34 ) (28 ) 21 81 (175 ) (92 ) Current year prior service cost (credit) — — — — — — (19 ) — (19 ) — Amortization of prior service cost — — — (1 ) — — (4 ) (4 ) (4 ) (5 ) Amounts recognized in OCI $ (437 ) $ 509 $ (20 ) $ 93 $ 61 $ 105 $ (9 ) $ 102 $ (405 ) $ 809 (1) Pretax amounts to be amortized from accumulated OCI as period cost during 2018 are estimated to be $176 million .
Schedule of Allocation of Plan Assets	The target allocations for 2018 by asset category for the Qualified Pension Plan, Non-U.S. Pension Plans, and Nonqualified and Other Pension Plans are presented in the following table. Equity securities for the Qualified Pension Plan include common stock of the Corporation in the amounts of $261 million ( 1.33 percent of total plan assets) and $203 million ( 1.11 percent of total plan assets) at December 31, 2017 and 2016 . 2018 Target Allocation Percentage Asset Category Qualified Pension Plan Non-U.S. Pension Plans Nonqualified and Other Pension Plans Equity securities 30-60 5-35 0-5 Debt securities 40-70 40-80 95-100 Real estate 0-10 0-15 0-5 Other 0-5 0-25 0-5
Schedule of Changes in Fair Value of Plan Assets	Combined plan investment assets measured at fair value by level and in total at December 31, 2017 and 2016 are summarized in the Fair Value Measurements table. Fair Value Measurements Level 1 Level 2 Level 3 Total (Dollars in millions) December 31, 2017 Cash and short-term investments Money market and interest-bearing cash $ 2,190 $ — $ — $ 2,190 Cash and cash equivalent commingled/mutual funds — 1,004 — 1,004 Fixed income U.S. government and agency securities 3,331 854 9 4,194 Corporate debt securities — 2,417 — 2,417 Asset-backed securities — 1,832 — 1,832 Non-U.S. debt securities 693 898 — 1,591 Fixed income commingled/mutual funds 775 1,676 — 2,451 Equity Common and preferred equity securities 5,833 — — 5,833 Equity commingled/mutual funds 271 1,753 — 2,024 Public real estate investment trusts 138 — — 138 Real estate Private real estate — — 93 93 Real estate commingled/mutual funds — 13 831 844 Limited partnerships — 155 85 240 Other investments (1) 101 649 74 824 Total plan investment assets, at fair value $ 13,332 $ 11,251 $ 1,092 $ 25,675 December 31, 2016 Cash and short-term investments Money market and interest-bearing cash $ 776 $ — $ — $ 776 Cash and cash equivalent commingled/mutual funds — 997 — 997 Fixed income U.S. government and agency securities 3,125 816 10 3,951 Corporate debt securities — 1,892 — 1,892 Asset-backed securities — 2,246 — 2,246 Non-U.S. debt securities 789 705 — 1,494 Fixed income commingled/mutual funds 778 1,503 — 2,281 Equity Common and preferred equity securities 6,120 — — 6,120 Equity commingled/mutual funds 735 1,225 — 1,960 Public real estate investment trusts 145 — — 145 Real estate Private real estate — — 150 150 Real estate commingled/mutual funds — 12 748 760 Limited partnerships — 132 38 170 Other investments (1) 15 732 83 830 Total plan investment assets, at fair value $ 12,483 $ 10,260 $ 1,029 $ 23,772 (1) Other investments include interest rate swaps of $156 million and $257 million , participant loans of $20 million and $36 million , commodity and balanced funds of $451 million and $369 million and other various investments of $197 million and $168 million at December 31, 2017 and 2016 . The Level 3 Fair Value Measurements table presents a reconciliation of all plan investment assets measured at fair value using significant unobservable inputs (Level 3) during 2017 , 2016 and 2015 . Level 3 Fair Value Measurements Balance January 1 Actual Return on Reporting Date Purchases, Sales and Settlements Balance December 31 (Dollars in millions) 2017 Fixed income U.S. government and agency securities $ 10 $ — $ (1 ) $ 9 Real estate Private real estate 150 8 (65 ) 93 Real estate commingled/mutual funds 748 63 20 831 Limited partnerships 38 14 33 85 Other investments 83 5 (14 ) 74 Total $ 1,029 $ 90 $ (27 ) $ 1,092 2016 Fixed income U.S. government and agency securities $ 11 $ — $ (1 ) $ 10 Real estate Private real estate 144 1 5 150 Real estate commingled/mutual funds 731 21 (4 ) 748 Limited partnerships 49 (2 ) (9 ) 38 Other investments 102 4 (23 ) 83 Total $ 1,037 $ 24 $ (32 ) $ 1,029 2015 Fixed income U.S. government and agency securities $ 11 $ — $ — $ 11 Real estate Private real estate 127 14 3 144 Real estate commingled/mutual funds 632 37 62 731 Limited partnerships 65 (1 ) (15 ) 49 Other investments 127 (5 ) (20 ) 102 Total $ 962 $ 45 $ 30 $ 1,037
Schedule of Expected Benefit Payments	Benefit payments projected to be made from the Qualified Pension Plan, Non-U.S. Pension Plans, Nonqualified and Other Pension Plans, and Postretirement Health and Life Plans are presented in the table below. Projected Benefit Payments (Dollars in millions) Qualified Pension Plan (1) Non-U.S. Pension Plans (2) Nonqualified and Other Pension Plans (2) Postretirement Health and Life Plans (3) 2018 $ 927 $ 90 $ 237 $ 92 2019 912 98 239 87 2020 924 104 242 84 2021 912 112 239 81 2022 919 121 232 78 2023 - 2027 4,455 695 1,073 343 (1) Benefit payments expected to be made from the plan’s assets. (2) Benefit payments expected to be made from a combination of the plans’ and the Corporation’s assets. (3) Benefit payments (net of retiree contributions) expected to be made from a combination of the plans’ and the Corporation’s assets.

Stock-based Compensation Plans

Stock-based Compensation Plans (Tables)	12 Months Ended
	Dec. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity	The table below presents the status at December 31, 2017 of the share-settled restricted stock/units and changes during 2017 . Stock-settled Restricted Stock/Units Shares/Units Weighted- average Grant Date Fair Value Outstanding at January 1, 2017 156,492,946 $ 11.99 Granted 81,555,447 24.58 Vested (52,187,746 ) 12.01 Canceled (6,587,404 ) 16.93 Outstanding at December 31, 2017 179,273,243 17.53 The table below presents the status at December 31, 2017 of the cash-settled RSUs granted under the KEEP and changes during 2017 . Cash-settled Restricted Units Units Outstanding at January 1, 2017 121,235,489 Granted 3,105,988 Vested (79,525,864 ) Canceled (2,605,987 ) Outstanding at December 31, 2017 42,209,626
Schedule of Share-based Compensation, Stock Options, Activity	The table below presents the status of all option plans at December 31, 2017 and changes during 2017 . Stock Options Options Weighted- average Exercise Price Outstanding at January 1, 2017 42,357,282 $ 50.57 Forfeited (25,769,108 ) 55.15 Outstanding at December 31, 2017 16,588,174 43.44

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Schedule of Components of Income Tax Expense (Benefit)	The components of income tax expense for 2017 , 2016 and 2015 are presented in the table below. Income Tax Expense (Dollars in millions) 2017 2016 2015 Current income tax expense U.S. federal $ 1,310 $ 302 $ 2,539 U.S. state and local 557 120 210 Non-U.S. 939 984 561 Total current expense 2,806 1,406 3,310 Deferred income tax expense U.S. federal 7,238 5,416 1,855 U.S. state and local 835 (279 ) 515 Non-U.S. 102 656 597 Total deferred expense 8,175 5,793 2,967 Total income tax expense $ 10,981 $ 7,199 $ 6,277
Schedule of Effective Income Tax Rate Reconciliation	A reconciliation of the expected U.S. federal income tax expense, calculated by applying the federal statutory tax rate of 35 percent , to the Corporation’s actual income tax expense, and the effective tax rates for 2017 , 2016 and 2015 are presented in the table below. Reconciliation of Income Tax Expense Amount Percent Amount Percent Amount Percent (Dollars in millions) 2017 2016 2015 Expected U.S. federal income tax expense $ 10,225 35.0 % $ 8,757 35.0 % $ 7,765 35.0 % Increase (decrease) in taxes resulting from: State tax expense, net of federal benefit 881 3.0 420 1.7 438 2.0 Tax law changes (1) 2,281 7.8 348 1.4 289 1.3 Changes in prior-period UTBs, including interest 133 0.5 (328 ) (1.3 ) (52 ) (0.2 ) Nondeductible expenses 97 0.3 180 0.7 40 0.1 Affordable housing/energy/other credits (1,406 ) (4.8 ) (1,203 ) (4.8 ) (1,087 ) (4.9 ) Tax-exempt income, including dividends (672 ) (2.3 ) (562 ) (2.2 ) (539 ) (2.4 ) Non-U.S. tax rate differential (272 ) (0.9 ) (307 ) (1.2 ) (559 ) (2.5 ) Share-based compensation (236 ) (0.8 ) — — — — Other (50 ) (0.2 ) (106 ) (0.5 ) (18 ) (0.1 ) Total income tax expense $ 10,981 37.6 % $ 7,199 28.8 % $ 6,277 28.3 %
Reconciliation of Change in Unrecognized Tax Benefits	The reconciliation of the beginning unrecognized tax benefits (UTB) balance to the ending balance is presented in the following table. Reconciliation of the Change in Unrecognized Tax Benefits (Dollars in millions) 2017 2016 2015 Balance, January 1 $ 875 $ 1,095 $ 1,068 Increases related to positions taken during the current year 292 104 36 Increases related to positions taken during prior years 750 1,318 187 Decreases related to positions taken during prior years (122 ) (1,091 ) (177 ) Settlements (17 ) (503 ) (1 ) Expiration of statute of limitations (5 ) (48 ) (18 ) Balance, December 31 $ 1,773 $ 875 $ 1,095
Summary of Income Tax Examinations	The following table summarizes the status of examinations by major jurisdiction for the Corporation and various subsidiaries at December 31, 2017 . Tax Examination Status Years under Examination (1) Status at December 31 2017 United States 2012 – 2013 IRS Appeals United States 2014 – 2016 Field examination New York 2015 Field examination United Kingdom 2016 To begin in 2018 (1) All tax years subsequent to the years shown remain subject to examination.
Schedule of Deferred Tax Assets and Liabilities	Significant components of the Corporation’s net deferred tax assets and liabilities at December 31, 2017 and 2016 are presented in the following table. Amounts at December 31, 2017 reflect appropriate revaluations as a result of the Tax Act’s new 21 percent federal tax rate. Deferred Tax Assets and Liabilities December 31 (Dollars in millions) 2017 2016 Deferred tax assets Net operating loss carryforwards $ 8,506 $ 9,199 Security, loan and debt valuations 2,939 4,726 Allowance for credit losses 2,598 4,362 Accrued expenses 2,021 3,016 Tax credit carryforwards 1,793 3,125 Employee compensation and retirement benefits 1,705 3,042 Available-for-sale securities 510 784 Other 1,034 1,599 Gross deferred tax assets 21,106 29,853 Valuation allowance (1,644 ) (1,117 ) Total deferred tax assets, net of valuation allowance 19,462 28,736 Deferred tax liabilities Equipment lease financing 2,492 3,489 Tax credit partnerships 734 539 Intangibles 670 1,171 Fee income 601 847 Mortgage servicing rights 349 829 Long-term borrowings 227 355 Other 1,764 1,915 Gross deferred tax liabilities 6,837 9,145 Net deferred tax assets, net of valuation allowance $ 12,625 $ 19,591
Schedule of Operating Loss Carryforwards	The table below summarizes the deferred tax assets and related valuation allowances recognized for the net operating loss (NOL) and tax credit carryforwards at December 31, 2017 . Net Operating Loss and Tax Credit Carryforward Deferred Tax Assets (Dollars in millions) Deferred Tax Asset Valuation Allowance Net Tax Asset First Year Expiring Net operating losses - U.S. $ 868 $ — $ 868 After 2027 Net operating losses - U.K. (1) 5,347 — 5,347 None Net operating losses - other non-U.S. 657 (578 ) 79 Various Net operating losses - U.S. states (2) 1,634 (584 ) 1,050 Various General business credits 1,721 — 1,721 After 2036 Foreign tax credits 72 (72 ) — n/a (1) Represents U.K. broker/dealer net operating losses which may be carried forward indefinitely. (2) The net operating losses and related valuation allowances for U.S. states before considering the benefit of federal deductions were $2.1 billion and $739 million . n/a = not applicable
Summary of Tax Credit Carryforwards	The table below summarizes the deferred tax assets and related valuation allowances recognized for the net operating loss (NOL) and tax credit carryforwards at December 31, 2017 . Net Operating Loss and Tax Credit Carryforward Deferred Tax Assets (Dollars in millions) Deferred Tax Asset Valuation Allowance Net Tax Asset First Year Expiring Net operating losses - U.S. $ 868 $ — $ 868 After 2027 Net operating losses - U.K. (1) 5,347 — 5,347 None Net operating losses - other non-U.S. 657 (578 ) 79 Various Net operating losses - U.S. states (2) 1,634 (584 ) 1,050 Various General business credits 1,721 — 1,721 After 2036 Foreign tax credits 72 (72 ) — n/a (1) Represents U.K. broker/dealer net operating losses which may be carried forward indefinitely. (2) The net operating losses and related valuation allowances for U.S. states before considering the benefit of federal deductions were $2.1 billion and $739 million . n/a = not applicable

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2017
Fair Value Disclosures [Abstract]
Assets and Liabilities Carried at Fair Value on a Recurring Basis	Assets and liabilities carried at fair value on a recurring basis at December 31, 2017 and 2016 , including financial instruments which the Corporation accounts for under the fair value option, are summarized in the following tables. December 31, 2017 Fair Value Measurements (Dollars in millions) Level 1 Level 2 Level 3 Netting Adjustments (1) Assets/Liabilities at Fair Value Assets Federal funds sold and securities borrowed or purchased under agreements to resell $ — $ 52,906 $ — $ — $ 52,906 Trading account assets: U.S. Treasury and agency securities (2, 3) 38,720 1,922 — — 40,642 Corporate securities, trading loans and other — 28,714 1,864 — 30,578 Equity securities (3) 60,747 23,958 235 — 84,940 Non-U.S. sovereign debt (3) 6,545 15,839 556 — 22,940 Mortgage trading loans, MBS and ABS: U.S. government-sponsored agency guaranteed (2) — 20,586 — — 20,586 Mortgage trading loans, ABS and other MBS — 8,174 1,498 — 9,672 Total trading account assets (4) 106,012 99,193 4,153 — 209,358 Derivative assets (3, 5) 6,305 341,178 4,067 (313,788 ) 37,762 AFS debt securities: U.S. Treasury and agency securities 51,915 1,608 — — 53,523 Mortgage-backed securities: Agency — 192,929 — — 192,929 Agency-collateralized mortgage obligations — 6,804 — — 6,804 Non-agency residential — 2,669 — — 2,669 Commercial — 13,684 — — 13,684 Non-U.S. securities 772 5,880 25 — 6,677 Other taxable securities — 5,261 509 — 5,770 Tax-exempt securities — 20,106 469 — 20,575 Total AFS debt securities 52,687 248,941 1,003 — 302,631 Other debt securities carried at fair value: Mortgage-backed securities: Agency-collateralized mortgage obligations — 5 — — 5 Non-agency residential — 2,764 — — 2,764 Non-U.S. securities 8,191 1,297 — — 9,488 Other taxable securities — 229 — — 229 Total other debt securities carried at fair value 8,191 4,295 — — 12,486 Loans and leases — 5,139 571 — 5,710 Mortgage servicing rights (6) — — 2,302 — 2,302 Loans held-for-sale — 1,466 690 — 2,156 Other assets 19,367 789 123 — 20,279 Total assets $ 192,562 $ 753,907 $ 12,909 $ (313,788 ) $ 645,590 Liabilities Interest-bearing deposits in U.S. offices $ — $ 449 $ — $ — $ 449 Federal funds purchased and securities loaned or sold under agreements to repurchase — 36,182 — — 36,182 Trading account liabilities: U.S. Treasury and agency securities 17,266 734 — — 18,000 Equity securities (3) 33,019 3,885 — — 36,904 Non-U.S. sovereign debt (3) 11,976 7,382 — — 19,358 Corporate securities and other — 6,901 24 — 6,925 Total trading account liabilities 62,261 18,902 24 — 81,187 Derivative liabilities (3, 5) 6,029 334,261 5,781 (311,771 ) 34,300 Short-term borrowings — 1,494 — — 1,494 Accrued expenses and other liabilities 21,887 945 8 — 22,840 Long-term debt — 29,923 1,863 — 31,786 Total liabilities $ 90,177 $ 422,156 $ 7,676 $ (311,771 ) $ 208,238 (1) Amounts represent the impact of legally enforceable master netting agreements and also cash collateral held or placed with the same counterparties. (2) Includes $21.3 billion of GSE obligations. (3) During 2017 , for trading account assets and liabilities, $1.1 billion of U.S. Treasury and agency securities assets, $5.3 billion of equity securities assets, $3.1 billion of equity securities liabilities, $3.3 billion of non-U.S. sovereign debt assets and $1.5 billion of non-U.S. sovereign debt liabilities were transferred from Level 1 to Level 2 based on the liquidity of the positions. In addition, $14.1 billion of equity securities assets and $4.3 billion of equity securities liabilities were transferred from Level 2 to Level 1. Also in 2017 , $4.2 billion of derivative assets and $3.0 billion of derivative liabilities were transferred from Level 1 to Level 2 and $758 million of derivative assets and $608 million of derivative liabilities were transferred from Level 2 to Level 1 based on the observability of inputs used to measure fair value. For further disaggregation of derivative assets and liabilities, see Note 2 – Derivatives . (4) Includes securities with a fair value of $16.8 billion that were segregated in compliance with securities regulations or deposited with clearing organizations. This amount is included in the parenthetical disclosure on the Consolidated Balance Sheet. (5) Derivative assets and liabilities reflect the effects of contractual amendments by two central clearing counterparties to legally re-characterize daily cash variation margin from collateral, which secures an outstanding exposure, to settlement, which discharges an outstanding exposure. One of these central clearing counterparties amended its governing documents, which became effective in January 2017. In addition, the Corporation elected to transfer its existing positions to the settlement platform for the other central clearing counterparty in September 2017. (6) MSRs include the $1.7 billion core MSR portfolio held in Consumer Banking , the $135 million non-core MSR portfolio held in All Other and the $510 million non-U.S. MSR portfolio held in Global Markets. December 31, 2016 Fair Value Measurements (Dollars in millions) Level 1 Level 2 Level 3 Netting Adjustments (1) Assets/Liabilities at Fair Value Assets Federal funds sold and securities borrowed or purchased under agreements to resell $ — $ 49,750 $ — $ — $ 49,750 Trading account assets: U.S. Treasury and agency securities (2) 34,587 1,927 — — 36,514 Corporate securities, trading loans and other 171 22,861 2,777 — 25,809 Equity securities 50,169 21,601 281 — 72,051 Non-U.S. sovereign debt 9,578 9,940 510 — 20,028 Mortgage trading loans, MBS and ABS: U.S. government-sponsored agency guaranteed (2) — 15,799 — — 15,799 Mortgage trading loans, ABS and other MBS — 8,797 1,211 — 10,008 Total trading account assets (3) 94,505 80,925 4,779 — 180,209 Derivative assets (4) 7,337 619,848 3,931 (588,604 ) 42,512 AFS debt securities: U.S. Treasury and agency securities 46,787 1,465 — — 48,252 Mortgage-backed securities: Agency — 189,486 — — 189,486 Agency-collateralized mortgage obligations — 8,330 — — 8,330 Non-agency residential — 2,013 — — 2,013 Commercial — 12,322 — — 12,322 Non-U.S. securities 1,934 3,600 229 — 5,763 Other taxable securities — 10,020 594 — 10,614 Tax-exempt securities — 16,618 542 — 17,160 Total AFS debt securities 48,721 243,854 1,365 — 293,940 Other debt securities carried at fair value: Mortgage-backed securities: Agency-collateralized mortgage obligations — 5 — — 5 Non-agency residential — 3,114 25 — 3,139 Non-U.S. securities 15,109 1,227 — — 16,336 Other taxable securities — 240 — — 240 Total other debt securities carried at fair value 15,109 4,586 25 — 19,720 Loans and leases — 6,365 720 — 7,085 Mortgage servicing rights (5) — — 2,747 — 2,747 Loans held-for-sale — 3,370 656 — 4,026 Debt securities in assets of business held for sale 619 — — — 619 Other assets 11,824 1,739 239 — 13,802 Total assets $ 178,115 $ 1,010,437 $ 14,462 $ (588,604 ) $ 614,410 Liabilities Interest-bearing deposits in U.S. offices $ — $ 731 $ — $ — $ 731 Federal funds purchased and securities loaned or sold under agreements to repurchase — 35,407 359 — 35,766 Trading account liabilities: U.S. Treasury and agency securities 15,854 197 — — 16,051 Equity securities 25,884 3,014 — — 28,898 Non-U.S. sovereign debt 9,409 2,103 — — 11,512 Corporate securities and other 163 6,380 27 — 6,570 Total trading account liabilities 51,310 11,694 27 — 63,031 Derivative liabilities (4) 7,173 615,896 5,244 (588,833 ) 39,480 Short-term borrowings — 2,024 — — 2,024 Accrued expenses and other liabilities 12,978 1,643 9 — 14,630 Long-term debt — 28,523 1,514 — 30,037 Total liabilities $ 71,461 $ 695,918 $ 7,153 $ (588,833 ) $ 185,699 (1) Amounts represent the impact of legally enforceable master netting agreements and also cash collateral held or placed with the same counterparties. (2) Includes $17.5 billion of GSE obligations. (3) Includes securities with a fair value of $14.6 billion that were segregated in compliance with securities regulations or deposited with clearing organizations. This amount is included in the parenthetical disclosure on the Consolidated Balance Sheet. (4) During 2016 , $2.3 billion of derivative assets and $2.4 billion of derivative liabilities were transferred from Level 1 to Level 2 and $2.0 billion of derivative assets and $1.8 billion of derivative liabilities were transferred from Level 2 to Level 1 based on the observability of inputs used to measure fair value. For further disaggregation of derivative assets and liabilities, see Note 2 – Derivatives . (5) MSRs include the $2.1 billion core MSR portfolio held in Consumer Banking , the $212 million non-core MSR portfolio held in All Other and the $469 million non-U.S. MSR portfolio held in Global Markets.
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation	Level 3 – Fair Value Measurements in 2015 (1) (Dollars in millions) Balance 2015 Total Realized/Unrealized Gains/(Losses) (2) Gains/ (3) Gross Gross Level 3 Gross Level 3 Balance 2015 Change in Unrealized Gains/(Losses) Related to Financial Instruments Still Held (2) Purchases Sales Issuances Settlements Trading account assets: Corporate securities, trading loans and other $ 3,270 $ (31 ) $ (11 ) $ 1,540 $ (1,616 ) $ — $ (1,122 ) $ 1,570 $ (762 ) $ 2,838 $ (123 ) Equity securities 352 9 — 49 (11 ) — (11 ) 41 (22 ) 407 3 Non-U.S. sovereign debt 574 114 (179 ) 185 (1 ) — (145 ) — (27 ) 521 74 Mortgage trading loans, ABS and other MBS 2,063 154 1 1,250 (1,117 ) — (493 ) 50 (40 ) 1,868 (93 ) Total trading account assets 6,259 246 (189 ) 3,024 (2,745 ) — (1,771 ) 1,661 (851 ) 5,634 (139 ) Net derivative assets (4) (920 ) 1,335 (7 ) 273 (863 ) — (261 ) (40 ) 42 (441 ) 605 AFS debt securities: Non-agency residential MBS 279 (12 ) — 134 — — (425 ) 167 (37 ) 106 — Non-U.S. securities 10 — — — — — (10 ) — — — — Other taxable securities 1,667 — — 189 — — (160 ) — (939 ) 757 — Tax-exempt securities 599 — — — — — (30 ) — — 569 — Total AFS debt securities 2,555 (12 ) — 323 — — (625 ) 167 (976 ) 1,432 — Other debt securities carried at fair value – Non-agency residential MBS — (3 ) — 33 — — — — — 30 — Loans and leases (5, 6) 1,983 (23 ) — — (4 ) 57 (237 ) 144 (300 ) 1,620 13 Mortgage servicing rights (6, 7) 3,530 187 — — (393 ) 637 (874 ) — — 3,087 (85 ) Loans held-for-sale (5) 173 (51 ) (8 ) 771 (203 ) 61 (61 ) 203 (98 ) 787 (39 ) Other assets 911 (55 ) — 11 (130 ) — (51 ) 10 (322 ) 374 (61 ) Federal funds purchased and securities loaned or sold under agreements to repurchase (5) — (11 ) — — — (131 ) 217 (411 ) 1 (335 ) — Trading account liabilities – Corporate securities and other (36 ) 19 — 30 (34 ) — — — — (21 ) (3 ) Short-term borrowings (5) — 17 — — — (52 ) 10 (24 ) 19 (30 ) 1 Accrued expenses and other liabilities (5) (10 ) 1 — — — — — — — (9 ) 1 Long-term debt (5) (2,362 ) 287 19 616 — (188 ) 273 (1,592 ) 1,434 (1,513 ) 255 (1) Assets (liabilities). For assets, increase (decrease) to Level 3 and for liabilities, (increase) decrease to Level 3. (2) Includes gains/losses reported in earnings in the following income statement line items: Trading account assets/liabilities - trading account profits; Net derivative assets - primarily trading account profits and mortgage banking income; MSRs - primarily mortgage banking income; Long-term debt - primarily trading account profits. For MSRs, the amounts reflect the changes in modeled MSR fair value due principally to observed changes in interest rates, volatility, spreads and the shape of the forward swap curve. (3) Includes unrealized gains/losses in OCI on AFS securities, foreign currency translation adjustments and the impact of changes in the Corporation’s credit spreads on long-term debt accounted for under the fair value option. For more information, see Note 1 – Summary of Significant Accounting Principles . (4) Net derivatives include derivative assets of $5.1 billion and derivative liabilities of $5.6 billion . (5) Amounts represent instruments that are accounted for under the fair value option. (6) Issuances represent loan originations and MSRs recognized following securitizations or whole-loan sales. (7) Settlements represent the net change in fair value of the MSR asset due to the recognition of modeled cash flows and the passage of time. Level 3 – Fair Value Measurements in 2017 (1) (Dollars in millions) Balance January 1 2017 Total Realized/Unrealized Gains/(Losses) (2) Gains/ (3) Gross Gross Level 3 Gross Level 3 Balance Change in Unrealized Gains/(Losses) Related to Financial Instruments Still Held (2) Purchases Sales Issuances Settlements Trading account assets: Corporate securities, trading loans and other $ 2,777 $ 229 $ — $ 547 $ (702 ) $ 5 $ (666 ) $ 728 $ (1,054 ) $ 1,864 $ 2 Equity securities 281 18 — 55 (70 ) — (10 ) 146 (185 ) 235 (1 ) Non-U.S. sovereign debt 510 74 (8 ) 53 (59 ) — (73 ) 72 (13 ) 556 70 Mortgage trading loans, ABS and other MBS 1,211 165 (2 ) 1,210 (990 ) — (233 ) 218 (81 ) 1,498 72 Total trading account assets 4,779 486 (10 ) 1,865 (1,821 ) 5 (982 ) 1,164 (1,333 ) 4,153 143 Net derivative assets (4) (1,313 ) (984 ) — 664 (979 ) — 949 48 (99 ) (1,714 ) (409 ) AFS debt securities: Non-U.S. securities 229 2 16 49 — — (271 ) — — 25 — Other taxable securities 594 4 8 5 — — (42 ) 34 (94 ) 509 — Tax-exempt securities 542 1 3 14 (70 ) — (11 ) 35 (45 ) 469 — Total AFS debt securities 1,365 7 27 68 (70 ) — (324 ) 69 (139 ) 1,003 — Other debt securities carried at fair value – Non-agency residential MBS 25 (1 ) — — (21 ) — (3 ) — — — — Loans and leases (5, 6) 720 15 — 3 (34 ) — (126 ) — (7 ) 571 11 Mortgage servicing rights (6, 7) 2,747 70 — — (25 ) 258 (748 ) — — 2,302 (248 ) Loans held-for-sale (5) 656 100 (3 ) 3 (189 ) — (346 ) 501 (32 ) 690 14 Other assets 239 74 (57 ) 2 (189 ) — (10 ) 64 — 123 22 Federal funds purchased and securities loaned or sold under agreements to repurchase (5) (359 ) (5 ) — — — (12 ) 171 (58 ) 263 — — Trading account liabilities – Corporate securities and other (27 ) 14 — 8 (17 ) (2 ) — — — (24 ) 2 Accrued expenses and other liabilities (5) (9 ) — — — — — 1 — — (8 ) — Long-term debt (5) (1,514 ) (135 ) (31 ) 84 — (288 ) 514 (711 ) 218 (1,863 ) (196 ) (1) Assets (liabilities). For assets, increase (decrease) to Level 3 and for liabilities, (increase) decrease to Level 3. (2) Includes gains/losses reported in earnings in the following income statement line items: Trading account assets/liabilities - primarily trading account profits; Net derivative assets - primarily trading account profits and mortgage banking income; MSRs - primarily mortgage banking income; Long-term debt - primarily trading account profits. For MSRs, the amounts reflect the changes in modeled MSR fair value due to observed changes in interest rates, volatility, spreads and the shape of the forward swap curve, and periodic adjustments to the valuation model to reflect changes in the modeled relationships between inputs and projected cash flows, as well as changes in cash flow assumptions including cost to service. (3) Includes unrealized gains/losses in OCI on AFS securities, foreign currency translation adjustments and the impact of changes in the Corporation’s credit spreads on long-term debt accounted for under the fair value option. For more information, see Note 1 – Summary of Significant Accounting Principles . (4) Net derivatives include derivative assets of $4.1 billion and derivative liabilities of $5.8 billion . (5) Amounts represent instruments that are accounted for under the fair value option. (6) Issuances represent loan originations and MSRs recognized following securitizations or whole-loan sales. (7) Settlements represent the net change in fair value of the MSR asset due to the recognition of modeled cash flows and the passage of time. Level 3 – Fair Value Measurements in 2016 (1) Balance 2016 Total Realized/Unrealized Gains/(Losses) (2) Gains/ (3) Gross Gross Level 3 Gross Level 3 Balance Change in Unrealized Gains/(Losses) Related to Financial Instruments Still Held (2) (Dollars in millions) Purchases Sales Issuances Settlements Trading account assets: Corporate securities, trading loans and other $ 2,838 $ 78 $ 2 $ 1,508 $ (847 ) $ — $ (725 ) $ 728 $ (805 ) $ 2,777 $ (82 ) Equity securities 407 74 — 73 (169 ) — (82 ) 70 (92 ) 281 (59 ) Non-U.S. sovereign debt 521 122 91 12 (146 ) — (90 ) — — 510 120 Mortgage trading loans, ABS and other MBS 1,868 188 (2 ) 988 (1,491 ) — (344 ) 158 (154 ) 1,211 64 Total trading account assets 5,634 462 91 2,581 (2,653 ) — (1,241 ) 956 (1,051 ) 4,779 43 Net derivative assets (4) (441 ) 285 — 470 (1,155 ) — 76 (186 ) (362 ) (1,313 ) (376 ) AFS debt securities: Non-agency residential MBS 106 — — — (106 ) — — — — — — Non-U.S. securities — — (6 ) 584 (92 ) — (263 ) 6 — 229 — Other taxable securities 757 4 (2 ) — — — (83 ) — (82 ) 594 — Tax-exempt securities 569 — (1 ) 1 — — (2 ) 10 (35 ) 542 — Total AFS debt securities 1,432 4 (9 ) 585 (198 ) — (348 ) 16 (117 ) 1,365 — Other debt securities carried at fair value – Non-agency residential MBS 30 (5 ) — — — — — — — 25 — Loans and leases (5, 6) 1,620 (44 ) — 69 (553 ) 50 (194 ) 6 (234 ) 720 17 Mortgage servicing rights (6, 7) 3,087 149 — — (80 ) 411 (820 ) — — 2,747 (107 ) Loans held-for-sale (5) 787 79 50 22 (256 ) — (93 ) 173 (106 ) 656 70 Other assets 374 (13 ) — 38 (111 ) — (52 ) 3 — 239 (36 ) Federal funds purchased and securities loaned or sold under agreements to repurchase (5) (335 ) (11 ) — — — (22 ) 27 (19 ) 1 (359 ) 4 Trading account liabilities – Corporate securities and other (21 ) 5 — — (11 ) — — — — (27 ) 4 Short-term borrowings (5) (30 ) 1 — — — — 29 — — — — Accrued expenses and other liabilities (5) (9 ) — — — — — — — — (9 ) — Long-term debt (5) (1,513 ) (74 ) (20 ) 140 — (521 ) 948 (939 ) 465 (1,514 ) (184 ) (1) Assets (liabilities). For assets, increase (decrease) to Level 3 and for liabilities, (increase) decrease to Level 3. (2) Includes gains/losses reported in earnings in the following income statement line items: Trading account assets/liabilities - trading account profits; Net derivative assets - primarily trading account profits and mortgage banking income; MSRs - primarily mortgage banking income; Long-term debt - primarily trading account profits. For MSRs, the amounts reflect the changes in modeled MSR fair value due principally to observed changes in interest rates, volatility, spreads and the shape of the forward swap curve. (3) Includes unrealized gains/losses in OCI on AFS securities, foreign currency translation adjustments and the impact of changes in the Corporation’s credit spreads on long-term debt accounted for under the fair value option. For more information, see Note 1 – Summary of Significant Accounting Principles . (4) Net derivatives include derivative assets of $3.9 billion and derivative liabilities of $5.2 billion . (5) Amounts represent instruments that are accounted for under the fair value option. (6) Issuances represent loan originations and MSRs recognized following securitizations or whole-loan sales. (7) Settlements represent the net change in fair value of the MSR asset due to the recognition of modeled cash flows and the passage of time.
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation	Level 3 – Fair Value Measurements in 2015 (1) (Dollars in millions) Balance 2015 Total Realized/Unrealized Gains/(Losses) (2) Gains/ (3) Gross Gross Level 3 Gross Level 3 Balance 2015 Change in Unrealized Gains/(Losses) Related to Financial Instruments Still Held (2) Purchases Sales Issuances Settlements Trading account assets: Corporate securities, trading loans and other $ 3,270 $ (31 ) $ (11 ) $ 1,540 $ (1,616 ) $ — $ (1,122 ) $ 1,570 $ (762 ) $ 2,838 $ (123 ) Equity securities 352 9 — 49 (11 ) — (11 ) 41 (22 ) 407 3 Non-U.S. sovereign debt 574 114 (179 ) 185 (1 ) — (145 ) — (27 ) 521 74 Mortgage trading loans, ABS and other MBS 2,063 154 1 1,250 (1,117 ) — (493 ) 50 (40 ) 1,868 (93 ) Total trading account assets 6,259 246 (189 ) 3,024 (2,745 ) — (1,771 ) 1,661 (851 ) 5,634 (139 ) Net derivative assets (4) (920 ) 1,335 (7 ) 273 (863 ) — (261 ) (40 ) 42 (441 ) 605 AFS debt securities: Non-agency residential MBS 279 (12 ) — 134 — — (425 ) 167 (37 ) 106 — Non-U.S. securities 10 — — — — — (10 ) — — — — Other taxable securities 1,667 — — 189 — — (160 ) — (939 ) 757 — Tax-exempt securities 599 — — — — — (30 ) — — 569 — Total AFS debt securities 2,555 (12 ) — 323 — — (625 ) 167 (976 ) 1,432 — Other debt securities carried at fair value – Non-agency residential MBS — (3 ) — 33 — — — — — 30 — Loans and leases (5, 6) 1,983 (23 ) — — (4 ) 57 (237 ) 144 (300 ) 1,620 13 Mortgage servicing rights (6, 7) 3,530 187 — — (393 ) 637 (874 ) — — 3,087 (85 ) Loans held-for-sale (5) 173 (51 ) (8 ) 771 (203 ) 61 (61 ) 203 (98 ) 787 (39 ) Other assets 911 (55 ) — 11 (130 ) — (51 ) 10 (322 ) 374 (61 ) Federal funds purchased and securities loaned or sold under agreements to repurchase (5) — (11 ) — — — (131 ) 217 (411 ) 1 (335 ) — Trading account liabilities – Corporate securities and other (36 ) 19 — 30 (34 ) — — — — (21 ) (3 ) Short-term borrowings (5) — 17 — — — (52 ) 10 (24 ) 19 (30 ) 1 Accrued expenses and other liabilities (5) (10 ) 1 — — — — — — — (9 ) 1 Long-term debt (5) (2,362 ) 287 19 616 — (188 ) 273 (1,592 ) 1,434 (1,513 ) 255 (1) Assets (liabilities). For assets, increase (decrease) to Level 3 and for liabilities, (increase) decrease to Level 3. (2) Includes gains/losses reported in earnings in the following income statement line items: Trading account assets/liabilities - trading account profits; Net derivative assets - primarily trading account profits and mortgage banking income; MSRs - primarily mortgage banking income; Long-term debt - primarily trading account profits. For MSRs, the amounts reflect the changes in modeled MSR fair value due principally to observed changes in interest rates, volatility, spreads and the shape of the forward swap curve. (3) Includes unrealized gains/losses in OCI on AFS securities, foreign currency translation adjustments and the impact of changes in the Corporation’s credit spreads on long-term debt accounted for under the fair value option. For more information, see Note 1 – Summary of Significant Accounting Principles . (4) Net derivatives include derivative assets of $5.1 billion and derivative liabilities of $5.6 billion . (5) Amounts represent instruments that are accounted for under the fair value option. (6) Issuances represent loan originations and MSRs recognized following securitizations or whole-loan sales. (7) Settlements represent the net change in fair value of the MSR asset due to the recognition of modeled cash flows and the passage of time. Level 3 – Fair Value Measurements in 2017 (1) (Dollars in millions) Balance January 1 2017 Total Realized/Unrealized Gains/(Losses) (2) Gains/ (3) Gross Gross Level 3 Gross Level 3 Balance Change in Unrealized Gains/(Losses) Related to Financial Instruments Still Held (2) Purchases Sales Issuances Settlements Trading account assets: Corporate securities, trading loans and other $ 2,777 $ 229 $ — $ 547 $ (702 ) $ 5 $ (666 ) $ 728 $ (1,054 ) $ 1,864 $ 2 Equity securities 281 18 — 55 (70 ) — (10 ) 146 (185 ) 235 (1 ) Non-U.S. sovereign debt 510 74 (8 ) 53 (59 ) — (73 ) 72 (13 ) 556 70 Mortgage trading loans, ABS and other MBS 1,211 165 (2 ) 1,210 (990 ) — (233 ) 218 (81 ) 1,498 72 Total trading account assets 4,779 486 (10 ) 1,865 (1,821 ) 5 (982 ) 1,164 (1,333 ) 4,153 143 Net derivative assets (4) (1,313 ) (984 ) — 664 (979 ) — 949 48 (99 ) (1,714 ) (409 ) AFS debt securities: Non-U.S. securities 229 2 16 49 — — (271 ) — — 25 — Other taxable securities 594 4 8 5 — — (42 ) 34 (94 ) 509 — Tax-exempt securities 542 1 3 14 (70 ) — (11 ) 35 (45 ) 469 — Total AFS debt securities 1,365 7 27 68 (70 ) — (324 ) 69 (139 ) 1,003 — Other debt securities carried at fair value – Non-agency residential MBS 25 (1 ) — — (21 ) — (3 ) — — — — Loans and leases (5, 6) 720 15 — 3 (34 ) — (126 ) — (7 ) 571 11 Mortgage servicing rights (6, 7) 2,747 70 — — (25 ) 258 (748 ) — — 2,302 (248 ) Loans held-for-sale (5) 656 100 (3 ) 3 (189 ) — (346 ) 501 (32 ) 690 14 Other assets 239 74 (57 ) 2 (189 ) — (10 ) 64 — 123 22 Federal funds purchased and securities loaned or sold under agreements to repurchase (5) (359 ) (5 ) — — — (12 ) 171 (58 ) 263 — — Trading account liabilities – Corporate securities and other (27 ) 14 — 8 (17 ) (2 ) — — — (24 ) 2 Accrued expenses and other liabilities (5) (9 ) — — — — — 1 — — (8 ) — Long-term debt (5) (1,514 ) (135 ) (31 ) 84 — (288 ) 514 (711 ) 218 (1,863 ) (196 ) (1) Assets (liabilities). For assets, increase (decrease) to Level 3 and for liabilities, (increase) decrease to Level 3. (2) Includes gains/losses reported in earnings in the following income statement line items: Trading account assets/liabilities - primarily trading account profits; Net derivative assets - primarily trading account profits and mortgage banking income; MSRs - primarily mortgage banking income; Long-term debt - primarily trading account profits. For MSRs, the amounts reflect the changes in modeled MSR fair value due to observed changes in interest rates, volatility, spreads and the shape of the forward swap curve, and periodic adjustments to the valuation model to reflect changes in the modeled relationships between inputs and projected cash flows, as well as changes in cash flow assumptions including cost to service. (3) Includes unrealized gains/losses in OCI on AFS securities, foreign currency translation adjustments and the impact of changes in the Corporation’s credit spreads on long-term debt accounted for under the fair value option. For more information, see Note 1 – Summary of Significant Accounting Principles . (4) Net derivatives include derivative assets of $4.1 billion and derivative liabilities of $5.8 billion . (5) Amounts represent instruments that are accounted for under the fair value option. (6) Issuances represent loan originations and MSRs recognized following securitizations or whole-loan sales. (7) Settlements represent the net change in fair value of the MSR asset due to the recognition of modeled cash flows and the passage of time. Level 3 – Fair Value Measurements in 2016 (1) Balance 2016 Total Realized/Unrealized Gains/(Losses) (2) Gains/ (3) Gross Gross Level 3 Gross Level 3 Balance Change in Unrealized Gains/(Losses) Related to Financial Instruments Still Held (2) (Dollars in millions) Purchases Sales Issuances Settlements Trading account assets: Corporate securities, trading loans and other $ 2,838 $ 78 $ 2 $ 1,508 $ (847 ) $ — $ (725 ) $ 728 $ (805 ) $ 2,777 $ (82 ) Equity securities 407 74 — 73 (169 ) — (82 ) 70 (92 ) 281 (59 ) Non-U.S. sovereign debt 521 122 91 12 (146 ) — (90 ) — — 510 120 Mortgage trading loans, ABS and other MBS 1,868 188 (2 ) 988 (1,491 ) — (344 ) 158 (154 ) 1,211 64 Total trading account assets 5,634 462 91 2,581 (2,653 ) — (1,241 ) 956 (1,051 ) 4,779 43 Net derivative assets (4) (441 ) 285 — 470 (1,155 ) — 76 (186 ) (362 ) (1,313 ) (376 ) AFS debt securities: Non-agency residential MBS 106 — — — (106 ) — — — — — — Non-U.S. securities — — (6 ) 584 (92 ) — (263 ) 6 — 229 — Other taxable securities 757 4 (2 ) — — — (83 ) — (82 ) 594 — Tax-exempt securities 569 — (1 ) 1 — — (2 ) 10 (35 ) 542 — Total AFS debt securities 1,432 4 (9 ) 585 (198 ) — (348 ) 16 (117 ) 1,365 — Other debt securities carried at fair value – Non-agency residential MBS 30 (5 ) — — — — — — — 25 — Loans and leases (5, 6) 1,620 (44 ) — 69 (553 ) 50 (194 ) 6 (234 ) 720 17 Mortgage servicing rights (6, 7) 3,087 149 — — (80 ) 411 (820 ) — — 2,747 (107 ) Loans held-for-sale (5) 787 79 50 22 (256 ) — (93 ) 173 (106 ) 656 70 Other assets 374 (13 ) — 38 (111 ) — (52 ) 3 — 239 (36 ) Federal funds purchased and securities loaned or sold under agreements to repurchase (5) (335 ) (11 ) — — — (22 ) 27 (19 ) 1 (359 ) 4 Trading account liabilities – Corporate securities and other (21 ) 5 — — (11 ) — — — — (27 ) 4 Short-term borrowings (5) (30 ) 1 — — — — 29 — — — — Accrued expenses and other liabilities (5) (9 ) — — — — — — — — (9 ) — Long-term debt (5) (1,513 ) (74 ) (20 ) 140 — (521 ) 948 (939 ) 465 (1,514 ) (184 ) (1) Assets (liabilities). For assets, increase (decrease) to Level 3 and for liabilities, (increase) decrease to Level 3. (2) Includes gains/losses reported in earnings in the following income statement line items: Trading account assets/liabilities - trading account profits; Net derivative assets - primarily trading account profits and mortgage banking income; MSRs - primarily mortgage banking income; Long-term debt - primarily trading account profits. For MSRs, the amounts reflect the changes in modeled MSR fair value due principally to observed changes in interest rates, volatility, spreads and the shape of the forward swap curve. (3) Includes unrealized gains/losses in OCI on AFS securities, foreign currency translation adjustments and the impact of changes in the Corporation’s credit spreads on long-term debt accounted for under the fair value option. For more information, see Note 1 – Summary of Significant Accounting Principles . (4) Net derivatives include derivative assets of $3.9 billion and derivative liabilities of $5.2 billion . (5) Amounts represent instruments that are accounted for under the fair value option. (6) Issuances represent loan originations and MSRs recognized following securitizations or whole-loan sales. (7) Settlements represent the net change in fair value of the MSR asset due to the recognition of modeled cash flows and the passage of time.
Fair Value Inputs, Assets, Quantitative Information	The following tables present information about significant unobservable inputs related to the Corporation’s material categories of Level 3 financial assets and liabilities at December 31, 2017 and 2016 . Quantitative Information about Level 3 Fair Value Measurements at December 31, 2017 (Dollars in millions) Inputs Financial Instrument Fair Value Valuation Technique Significant Unobservable Inputs Ranges of Inputs Weighted Average Loans and Securities (1) Instruments backed by residential real estate assets $ 871 Discounted cash flow Yield 0% to 25% 6 % Trading account assets – Mortgage trading loans, ABS and other MBS 298 Prepayment speed 0% to 22% CPR 12 % Loans and leases 570 Default rate 0% to 3% CDR 1 % Loans held-for-sale 3 Loss severity 0% to 53% 17 % Instruments backed by commercial real estate assets $ 286 Discounted cash flow Yield 0% to 25% 9 % Trading account assets – Corporate securities, trading loans and other 244 Price $0 to $100 $67 Trading account assets – Mortgage trading loans, ABS and other MBS 42 Commercial loans, debt securities and other $ 4,023 Discounted cash flow, Market comparables Yield 0% to 12% 5 % Trading account assets – Corporate securities, trading loans and other 1,613 Prepayment speed 10% to 20% 16 % Trading account assets – Non-U.S. sovereign debt 556 Default rate 3% to 4% 4 % Trading account assets – Mortgage trading loans, ABS and other MBS 1,158 Loss severity 35% to 40% 37 % AFS debt securities – Other taxable securities 8 Price $0 to $145 $63 Loans and leases 1 Loans held-for-sale 687 Auction rate securities $ 977 Discounted cash flow, Market comparables Price $10 to $100 $94 Trading account assets – Corporate securities, trading loans and other 7 AFS debt securities – Other taxable securities 501 AFS debt securities – Tax-exempt securities 469 MSRs $ 2,302 Discounted cash flow Weighted-average life, fixed rate (4) 0 to 14 years 5 years Weighted-average life, variable rate (4) 0 to 10 years 3 years Option Adjusted Spread, fixed rate 9% to 14% 10 % Option Adjusted Spread, variable rate 9% to 15% 12 % Structured liabilities Long-term debt $ (1,863 ) Discounted cash flow, Market comparables, Industry standard derivative pricing (2) Equity correlation 15% to 100% 63 % Long-dated equity volatilities 4% to 84% 22 % Yield 7.5 % n/a Price $0 to $100 $66 Net derivative assets Credit derivatives $ (282 ) Discounted cash flow, Stochastic recovery correlation model Yield 1% to 5% 3 % Upfront points 0 points to 100 points 71 points Credit correlation 35% to 83% 42 % Prepayment speed 15% to 20% CPR 16 % Default rate 1% to 4% CDR 2 % Loss severity 35 % n/a Price $0 to $102 $82 Equity derivatives $ (2,059 ) Industry standard derivative pricing (2) Equity correlation 15% to 100% 63 % Long-dated equity volatilities 4% to 84% 22 % Commodity derivatives $ (3 ) Discounted cash flow, Industry standard derivative pricing (2) Natural gas forward price $1/MMBtu to $5/MMBtu $3/MMBtu Correlation 71% to 87% 81 % Volatilities 26% to 132% 57 % Interest rate derivatives $ 630 Industry standard derivative pricing (3) Correlation (IR/IR) 15% to 92% 50 % Correlation (FX/IR) 0% to 46% 1 % Long-dated inflation rates -14% to 38% 4 % Long-dated inflation volatilities 0% to 1% 1 % Total net derivative assets $ (1,714 ) (1) The categories are aggregated based upon product type which differs from financial statement classification. The following is a reconciliation to the line items in the table on page 173 : Trading account assets – Corporate securities, trading loans and other of $1.9 billion , Trading account assets – Non-U.S. sovereign debt of $556 million , Trading account assets – Mortgage trading loans, ABS and other MBS of $1.5 billion , AFS debt securities – Other taxable securities of $509 million , AFS debt securities – Tax-exempt securities of $469 million , Loans and leases of $571 million and LHFS of $690 million . (2) Includes models such as Monte Carlo simulation and Black-Scholes. (3) Includes models such as Monte Carlo simulation, Black-Scholes and other methods that model the joint dynamics of interest, inflation and foreign exchange rates. (4) The weighted-average life is a product of changes in market rates of interest, prepayment rates and other model and cash flow assumptions. CPR = Constant Prepayment Rate CDR = Constant Default Rate MMBtu = Million British thermal units IR = Interest Rate FX = Foreign Exchange n/a = not applicable Quantitative Information about Level 3 Fair Value Measurements at December 31, 2016 (Dollars in millions) Inputs Financial Instrument Fair Valuation Significant Unobservable Ranges of Weighted Average Loans and Securities (1) Instruments backed by residential real estate assets $ 1,066 Discounted cash flow, Market comparables Yield 0% to 50% 7 % Trading account assets – Mortgage trading loans, ABS and other MBS 337 Prepayment speed 0% to 27% CPR 14 % Loans and leases 718 Default rate 0% to 3% CDR 2 % Loans held-for-sale 11 Loss severity 0% to 54% 18 % Instruments backed by commercial real estate assets $ 317 Discounted cash flow, Market comparables Yield 0% to 39% 11 % Trading account assets – Corporate securities, trading loans and other 178 Price $0 to $100 $65 Trading account assets – Mortgage trading loans, ABS and other MBS 53 Loans held-for-sale 86 Commercial loans, debt securities and other $ 4,486 Discounted cash flow, Market comparables Yield 1% to 37% 14 % Trading account assets – Corporate securities, trading loans and other 2,565 Prepayment speed 5% to 20% 19 % Trading account assets – Non-U.S. sovereign debt 510 Default rate 3% to 4% 4 % Trading account assets – Mortgage trading loans, ABS and other MBS 821 Loss severity 0% to 50% 19 % AFS debt securities – Other taxable securities 29 Price $0 to $292 $68 Loans and leases 2 Duration 0 to 5 years 3 years Loans held-for-sale 559 Enterprise value/EBITDA multiple 34x n/a Auction rate securities $ 1,141 Discounted cash flow, Market comparables Price $10 to $100 $94 Trading account assets – Corporate securities, trading loans and other 34 AFS debt securities – Other taxable securities 565 AFS debt securities – Tax-exempt securities 542 MSRs $ 2,747 Discounted cash flow Weighted-average life, fixed rate (4) 0 to 15 years 6 years Weighted-average life, variable rate (4) 0 to 14 years 4 years Option Adjusted Spread, fixed rate 9% to 14% 10 % Option Adjusted Spread, variable rate 9% to 15% 12 % Structured liabilities Long-term debt $ (1,514 ) Discounted cash flow, Market comparables, Industry standard derivative pricing (2) Equity correlation 13% to 100% 68 % Long-dated equity volatilities 4% to 76% 26 % Yield 6% to 37% 20 % Price $12 to $87 $73 Duration 0 to 5 years 3 years Net derivative assets Credit derivatives $ (129 ) Discounted cash flow, Stochastic recovery correlation model Yield 0% to 24% 13 % Upfront points 0 to 100 points 72 points Credit spreads 17 bps to 814 bps 248 bps Credit correlation 21% to 80% 44 % Prepayment speed 10% to 20% CPR 18 % Default rate 1% to 4% CDR 3 % Loss severity 35 % n/a Equity derivatives $ (1,690 ) Industry standard derivative pricing (2) Equity correlation 13% to 100% 68 % Long-dated equity volatilities 4% to 76% 26 % Commodity derivatives $ 6 Discounted cash flow, Industry standard derivative pricing (2) Natural gas forward price $2/MMBtu to $6/MMBtu $4/MMBtu Correlation 66% to 95% 85 % Volatilities 23% to 96% 36 % Interest rate derivatives $ 500 Industry standard derivative pricing (3) Correlation (IR/IR) 15% to 99% 56 % Correlation (FX/IR) 0% to 40% 2 % Illiquid IR and long-dated inflation rates -12% to 35% 5 % Long-dated inflation volatilities 0% to 2% 1 % Total net derivative assets $ (1,313 ) (1) The categories are aggregated based upon product type which differs from financial statement classification. The following is a reconciliation to the line items in the table on page 174 : Trading account assets – Corporate securities, trading loans and other of $2.8 billion , Trading account assets – Non-U.S. sovereign debt of $510 million , Trading account assets – Mortgage trading loans, ABS and other MBS of $1.2 billion , AFS debt securities – Other taxable securities of $594 million , AFS debt securities – Tax-exempt securities of $542 million , Loans and leases of $720 million and LHFS of $656 million . (2) Includes models such as Monte Carlo simulation and Black-Scholes. (3) Includes models such as Monte Carlo simulation, Black-Scholes and other methods that model the joint dynamics of interest, inflation and foreign exchange rates. (4) The weighted-average life is a product of changes in market rates of interest, prepayment rates and other model and cash flow assumptions. CPR = Constant Prepayment Rate CDR = Constant Default Rate EBITDA = Earnings before interest, taxes, depreciation and amortization MMBtu = Million British thermal units IR = Interest Rate FX = Foreign Exchange n/a = not applicable
Fair Value Inputs, Liabilities, Quantitative Information	The following tables present information about significant unobservable inputs related to the Corporation’s material categories of Level 3 financial assets and liabilities at December 31, 2017 and 2016 . Quantitative Information about Level 3 Fair Value Measurements at December 31, 2017 (Dollars in millions) Inputs Financial Instrument Fair Value Valuation Technique Significant Unobservable Inputs Ranges of Inputs Weighted Average Loans and Securities (1) Instruments backed by residential real estate assets $ 871 Discounted cash flow Yield 0% to 25% 6 % Trading account assets – Mortgage trading loans, ABS and other MBS 298 Prepayment speed 0% to 22% CPR 12 % Loans and leases 570 Default rate 0% to 3% CDR 1 % Loans held-for-sale 3 Loss severity 0% to 53% 17 % Instruments backed by commercial real estate assets $ 286 Discounted cash flow Yield 0% to 25% 9 % Trading account assets – Corporate securities, trading loans and other 244 Price $0 to $100 $67 Trading account assets – Mortgage trading loans, ABS and other MBS 42 Commercial loans, debt securities and other $ 4,023 Discounted cash flow, Market comparables Yield 0% to 12% 5 % Trading account assets – Corporate securities, trading loans and other 1,613 Prepayment speed 10% to 20% 16 % Trading account assets – Non-U.S. sovereign debt 556 Default rate 3% to 4% 4 % Trading account assets – Mortgage trading loans, ABS and other MBS 1,158 Loss severity 35% to 40% 37 % AFS debt securities – Other taxable securities 8 Price $0 to $145 $63 Loans and leases 1 Loans held-for-sale 687 Auction rate securities $ 977 Discounted cash flow, Market comparables Price $10 to $100 $94 Trading account assets – Corporate securities, trading loans and other 7 AFS debt securities – Other taxable securities 501 AFS debt securities – Tax-exempt securities 469 MSRs $ 2,302 Discounted cash flow Weighted-average life, fixed rate (4) 0 to 14 years 5 years Weighted-average life, variable rate (4) 0 to 10 years 3 years Option Adjusted Spread, fixed rate 9% to 14% 10 % Option Adjusted Spread, variable rate 9% to 15% 12 % Structured liabilities Long-term debt $ (1,863 ) Discounted cash flow, Market comparables, Industry standard derivative pricing (2) Equity correlation 15% to 100% 63 % Long-dated equity volatilities 4% to 84% 22 % Yield 7.5 % n/a Price $0 to $100 $66 Net derivative assets Credit derivatives $ (282 ) Discounted cash flow, Stochastic recovery correlation model Yield 1% to 5% 3 % Upfront points 0 points to 100 points 71 points Credit correlation 35% to 83% 42 % Prepayment speed 15% to 20% CPR 16 % Default rate 1% to 4% CDR 2 % Loss severity 35 % n/a Price $0 to $102 $82 Equity derivatives $ (2,059 ) Industry standard derivative pricing (2) Equity correlation 15% to 100% 63 % Long-dated equity volatilities 4% to 84% 22 % Commodity derivatives $ (3 ) Discounted cash flow, Industry standard derivative pricing (2) Natural gas forward price $1/MMBtu to $5/MMBtu $3/MMBtu Correlation 71% to 87% 81 % Volatilities 26% to 132% 57 % Interest rate derivatives $ 630 Industry standard derivative pricing (3) Correlation (IR/IR) 15% to 92% 50 % Correlation (FX/IR) 0% to 46% 1 % Long-dated inflation rates -14% to 38% 4 % Long-dated inflation volatilities 0% to 1% 1 % Total net derivative assets $ (1,714 ) (1) The categories are aggregated based upon product type which differs from financial statement classification. The following is a reconciliation to the line items in the table on page 173 : Trading account assets – Corporate securities, trading loans and other of $1.9 billion , Trading account assets – Non-U.S. sovereign debt of $556 million , Trading account assets – Mortgage trading loans, ABS and other MBS of $1.5 billion , AFS debt securities – Other taxable securities of $509 million , AFS debt securities – Tax-exempt securities of $469 million , Loans and leases of $571 million and LHFS of $690 million . (2) Includes models such as Monte Carlo simulation and Black-Scholes. (3) Includes models such as Monte Carlo simulation, Black-Scholes and other methods that model the joint dynamics of interest, inflation and foreign exchange rates. (4) The weighted-average life is a product of changes in market rates of interest, prepayment rates and other model and cash flow assumptions. CPR = Constant Prepayment Rate CDR = Constant Default Rate MMBtu = Million British thermal units IR = Interest Rate FX = Foreign Exchange n/a = not applicable Quantitative Information about Level 3 Fair Value Measurements at December 31, 2016 (Dollars in millions) Inputs Financial Instrument Fair Valuation Significant Unobservable Ranges of Weighted Average Loans and Securities (1) Instruments backed by residential real estate assets $ 1,066 Discounted cash flow, Market comparables Yield 0% to 50% 7 % Trading account assets – Mortgage trading loans, ABS and other MBS 337 Prepayment speed 0% to 27% CPR 14 % Loans and leases 718 Default rate 0% to 3% CDR 2 % Loans held-for-sale 11 Loss severity 0% to 54% 18 % Instruments backed by commercial real estate assets $ 317 Discounted cash flow, Market comparables Yield 0% to 39% 11 % Trading account assets – Corporate securities, trading loans and other 178 Price $0 to $100 $65 Trading account assets – Mortgage trading loans, ABS and other MBS 53 Loans held-for-sale 86 Commercial loans, debt securities and other $ 4,486 Discounted cash flow, Market comparables Yield 1% to 37% 14 % Trading account assets – Corporate securities, trading loans and other 2,565 Prepayment speed 5% to 20% 19 % Trading account assets – Non-U.S. sovereign debt 510 Default rate 3% to 4% 4 % Trading account assets – Mortgage trading loans, ABS and other MBS 821 Loss severity 0% to 50% 19 % AFS debt securities – Other taxable securities 29 Price $0 to $292 $68 Loans and leases 2 Duration 0 to 5 years 3 years Loans held-for-sale 559 Enterprise value/EBITDA multiple 34x n/a Auction rate securities $ 1,141 Discounted cash flow, Market comparables Price $10 to $100 $94 Trading account assets – Corporate securities, trading loans and other 34 AFS debt securities – Other taxable securities 565 AFS debt securities – Tax-exempt securities 542 MSRs $ 2,747 Discounted cash flow Weighted-average life, fixed rate (4) 0 to 15 years 6 years Weighted-average life, variable rate (4) 0 to 14 years 4 years Option Adjusted Spread, fixed rate 9% to 14% 10 % Option Adjusted Spread, variable rate 9% to 15% 12 % Structured liabilities Long-term debt $ (1,514 ) Discounted cash flow, Market comparables, Industry standard derivative pricing (2) Equity correlation 13% to 100% 68 % Long-dated equity volatilities 4% to 76% 26 % Yield 6% to 37% 20 % Price $12 to $87 $73 Duration 0 to 5 years 3 years Net derivative assets Credit derivatives $ (129 ) Discounted cash flow, Stochastic recovery correlation model Yield 0% to 24% 13 % Upfront points 0 to 100 points 72 points Credit spreads 17 bps to 814 bps 248 bps Credit correlation 21% to 80% 44 % Prepayment speed 10% to 20% CPR 18 % Default rate 1% to 4% CDR 3 % Loss severity 35 % n/a Equity derivatives $ (1,690 ) Industry standard derivative pricing (2) Equity correlation 13% to 100% 68 % Long-dated equity volatilities 4% to 76% 26 % Commodity derivatives $ 6 Discounted cash flow, Industry standard derivative pricing (2) Natural gas forward price $2/MMBtu to $6/MMBtu $4/MMBtu Correlation 66% to 95% 85 % Volatilities 23% to 96% 36 % Interest rate derivatives $ 500 Industry standard derivative pricing (3) Correlation (IR/IR) 15% to 99% 56 % Correlation (FX/IR) 0% to 40% 2 % Illiquid IR and long-dated inflation rates -12% to 35% 5 % Long-dated inflation volatilities 0% to 2% 1 % Total net derivative assets $ (1,313 ) (1) The categories are aggregated based upon product type which differs from financial statement classification. The following is a reconciliation to the line items in the table on page 174 : Trading account assets – Corporate securities, trading loans and other of $2.8 billion , Trading account assets – Non-U.S. sovereign debt of $510 million , Trading account assets – Mortgage trading loans, ABS and other MBS of $1.2 billion , AFS debt securities – Other taxable securities of $594 million , AFS debt securities – Tax-exempt securities of $542 million , Loans and leases of $720 million and LHFS of $656 million . (2) Includes models such as Monte Carlo simulation and Black-Scholes. (3) Includes models such as Monte Carlo simulation, Black-Scholes and other methods that model the joint dynamics of interest, inflation and foreign exchange rates. (4) The weighted-average life is a product of changes in market rates of interest, prepayment rates and other model and cash flow assumptions. CPR = Constant Prepayment Rate CDR = Constant Default Rate EBITDA = Earnings before interest, taxes, depreciation and amortization MMBtu = Million British thermal units IR = Interest Rate FX = Foreign Exchange n/a = not applicable
Assets and Liabilities Measured at Fair Value on Nonrecurring Basis	The amounts below represent assets still held as of the reporting date for which a nonrecurring fair value adjustment was recorded during 2017 , 2016 and 2015 . Assets Measured at Fair Value on a Nonrecurring Basis December 31, 2017 December 31, 2016 (Dollars in millions) Level 2 Level 3 Level 2 Level 3 Assets Loans held-for-sale $ — $ 2 $ 193 $ 44 Loans and leases (1) — 894 — 1,416 Foreclosed properties (2, 3) — 83 — 77 Other assets 425 — 358 — Gains (Losses) 2017 2016 2015 Assets Loans held-for-sale $ (6 ) $ (54 ) $ (8 ) Loans and leases (1) (336 ) (458 ) (993 ) Foreclosed properties (41 ) (41 ) (57 ) Other assets (124 ) (74 ) (28 ) (1) Includes $135 million of losses on loans that were written down to a collateral value of zero during 2017 compared to losses of $150 million and $174 million for 2016 and 2015 . (2) Amounts are included in other assets on the Consolidated Balance Sheet and represent the carrying value of foreclosed properties that were written down subsequent to their initial classification as foreclosed properties. Losses on foreclosed properties include losses recorded during the first 90 days after transfer of a loan to foreclosed properties. (3) Excludes $801 million and $1.2 billion of properties acquired upon foreclosure of certain government-guaranteed loans (principally FHA-insured loans) at December 31, 2017 and 2016 .
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis, Valuation Techniques	The table below presents information about significant unobservable inputs related to the Corporation’s nonrecurring Level 3 financial assets and liabilities at December 31, 2017 and 2016 . Loans and leases backed by residential real estate assets represent residential mortgages where the loan has been written down to the fair value of the underlying collateral. Quantitative Information about Nonrecurring Level 3 Fair Value Measurements (Dollars in millions) Inputs Financial Instrument Fair Value Valuation Technique Significant Unobservable Inputs Ranges of Inputs Weighted Average December 31, 2017 Loans and leases backed by residential real estate assets $ 894 Market comparables OREO discount 15% to 58% 23 % Costs to sell 5% to 49% 7 % December 31, 2016 Loans and leases backed by residential real estate assets $ 1,416 Market comparables OREO discount 8% to 56% 21 % Costs to sell 7% to 45% 9 %

Fair Value Option (Tables)

Fair Value Option (Tables)	12 Months Ended
	Dec. 31, 2017
Fair Value Option [Abstract]
Schedule of Fair Value Option Elections	The table below provides information about the fair value carrying amount and the contractual principal outstanding of assets and liabilities accounted for under the fair value option at December 31, 2017 and 2016 . Fair Value Option Elections Fair Value Carrying Amount Contractual Principal Outstanding Fair Value Carrying Amount Less Unpaid Principal Fair Value Carrying Amount Contractual Principal Outstanding Fair Value Carrying Amount Less Unpaid Principal December 31, 2017 December 31, 2016 (Dollars in millions) Federal funds sold and securities borrowed or purchased under agreements to resell $ 52,906 $ 52,907 $ (1 ) $ 49,750 $ 49,615 $ 135 Loans reported as trading account assets (1) 5,735 11,804 (6,069 ) 6,215 11,557 (5,342 ) Trading inventory – other 12,027 n/a n/a 8,206 n/a n/a Consumer and commercial loans 5,710 5,744 (34 ) 7,085 7,190 (105 ) Loans held-for-sale 2,156 3,717 (1,561 ) 4,026 5,595 (1,569 ) Customer receivables and other assets 3 n/a n/a 253 250 3 Long-term deposits 449 421 28 731 672 59 Federal funds purchased and securities loaned or sold under agreements to repurchase 36,182 36,187 (5 ) 35,766 35,929 (163 ) Short-term borrowings 1,494 1,494 — 2,024 2,024 — Unfunded loan commitments 120 n/a n/a 173 n/a n/a Long-term debt (2) 31,786 31,512 274 30,037 29,862 175 (1) A significant portion of the loans reported as trading account assets are distressed loans that trade and were purchased at a deep discount to par, and the remainder are loans with a fair value near contractual principal outstanding. (2) Includes structured liabilities with a fair value of $31.4 billion and $29.7 billion , and contractual principal outstanding of $31.1 billion and $29.5 billion at December 31, 2017 and 2016 . n/a = not applicable The following tables provide information about where changes in the fair value of assets and liabilities accounted for under the fair value option are included in the Consolidated Statement of Income for 2017 , 2016 and 2015 . Gains (Losses) Relating to Assets and Liabilities Accounted for Under the Fair Value Option Trading Account Profits Mortgage Banking Income Other Income Total (Dollars in millions) 2017 Federal funds sold and securities borrowed or purchased under agreements to resell $ (57 ) $ — $ — $ (57 ) Loans reported as trading account assets 318 — — 318 Trading inventory – other (1) 3,821 — — 3,821 Consumer and commercial loans (9 ) — 35 26 Loans held-for-sale (2) — 211 87 298 Unfunded loan commitments — — 36 36 Long-term debt (3, 4) (1,044 ) — (146 ) (1,190 ) Other (5) (36 ) — 13 (23 ) Total $ 2,993 $ 211 $ 25 $ 3,229 2016 Federal funds sold and securities borrowed or purchased under agreements to resell $ (64 ) $ — $ 1 $ (63 ) Loans reported as trading account assets 301 — — 301 Trading inventory – other (1) 57 — — 57 Consumer and commercial loans 49 — (37 ) 12 Loans held-for-sale (2) 11 518 6 535 Unfunded loan commitments — — 487 487 Long-term debt (3, 4) (489 ) — (97 ) (586 ) Other (5) (21 ) — 52 31 Total $ (156 ) $ 518 $ 412 $ 774 2015 Federal funds sold and securities borrowed or purchased under agreements to resell $ (195 ) $ — $ — $ (195 ) Loans reported as trading account assets (199 ) — — (199 ) Trading inventory – other (1) 1,284 — — 1,284 Consumer and commercial loans 52 — (295 ) (243 ) Loans held-for-sale (2) (36 ) 673 63 700 Unfunded loan commitments — — (210 ) (210 ) Long-term debt (3, 4) 2,107 — (633 ) 1,474 Other (5) 37 — 23 60 Total $ 3,050 $ 673 $ (1,052 ) $ 2,671 (1) The gains in trading account profits are primarily offset by losses on trading liabilities that hedge these assets. (2) Includes the value of IRLCs on funded loans, including those sold during the period. (3) The majority of the net gains (losses) in trading account profits relate to the embedded derivative in structured liabilities and are offset by gains (losses) on derivatives and securities that hedge these liabilities. (4) For the cumulative impact of changes in the Corporation’s own credit spreads and the amount recognized in OCI, see Note 14 – Accumulated Other Comprehensive Income (Loss) . For more information on how the Corporation’s own credit spread is determined, see Note 20 – Fair Value Measurements . (5) Includes gains (losses) on other assets, long-term deposits, federal funds purchased and securities loaned or sold under agreements to repurchase and short-term borrowings. Gains (Losses) Related to Borrower-specific Credit Risk for Assets Accounted for Under the Fair Value Option (Dollars in millions) 2017 2016 2015 Loans reported as trading account assets $ 24 $ 7 $ 37 Consumer and commercial loans 36 (53 ) (200 ) Loans held-for-sale (22 ) (34 ) 37

Fair Value of Financial Instr54

Fair Value of Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2017
Fair Value Disclosures [Abstract]
Carrying and Fair Value of Financial Instruments	The carrying values and fair values by fair value hierarchy of certain financial instruments where only a portion of the ending balance was carried at fair value at December 31, 2017 and 2016 are presented in the following table. Fair Value of Financial Instruments Fair Value Carrying Value Level 2 Level 3 Total (Dollars in millions) December 31, 2017 Financial assets Loans $ 904,399 $ 68,586 $ 849,576 $ 918,162 Loans held-for-sale 11,430 10,521 909 11,430 Financial liabilities Deposits 1,309,545 1,309,398 — 1,309,398 Long-term debt 227,402 235,126 1,863 236,989 December 31, 2016 Financial assets Loans $ 873,209 $ 71,793 $ 815,329 $ 887,122 Loans held-for-sale 9,066 8,082 984 9,066 Financial liabilities Deposits 1,260,934 1,261,086 — 1,261,086 Long-term debt 216,823 220,071 1,514 221,585

Business Segment Information (T

Business Segment Information (Tables)	12 Months Ended
	Dec. 31, 2017
Segment Reporting [Abstract]
Schedule of Segment Reporting Information, by Segment	The tables below present net income (loss) and the components thereto (with net interest income on an FTE basis) for 2017 , 2016 and 2015 , and total assets at December 31, 2017 and 2016 for each business segment, as well as All Other, including a reconciliation of the four business segments’ total revenue, net of interest expense, on an FTE basis, and net income to the Consolidated Statement of Income, and total assets to the Consolidated Balance Sheet. Results of Business Segments and All Other At and for the year ended December 31 Total Corporation (1) Consumer Banking (Dollars in millions) 2017 2016 2015 2017 2016 2015 Net interest income (FTE basis) $ 45,592 $ 41,996 $ 39,847 $ 24,307 $ 21,290 $ 20,428 Noninterest income 42,685 42,605 44,007 10,214 10,441 11,091 Total revenue, net of interest expense (FTE basis) 88,277 84,601 83,854 34,521 31,731 31,519 Provision for credit losses 3,396 3,597 3,161 3,525 2,715 2,346 Noninterest expense 54,743 55,083 57,617 17,787 17,654 18,710 Income before income taxes (FTE basis) 30,138 25,921 23,076 13,209 11,362 10,463 Income tax expense (FTE basis) 11,906 8,099 7,166 5,002 4,190 3,814 Net income $ 18,232 $ 17,822 $ 15,910 $ 8,207 $ 7,172 $ 6,649 Period-end total assets $ 2,281,234 $ 2,188,067 $ 749,325 $ 702,333 Global Wealth & Global Banking 2017 2016 2015 2017 2016 2015 Net interest income (FTE basis) $ 6,173 $ 5,759 $ 5,527 $ 10,504 $ 9,471 $ 9,244 Noninterest income 12,417 11,891 12,507 9,495 8,974 8,377 Total revenue, net of interest expense (FTE basis) 18,590 17,650 18,034 19,999 18,445 17,621 Provision for credit losses 56 68 51 212 883 686 Noninterest expense 13,564 13,175 13,938 8,596 8,486 8,482 Income before income taxes (FTE basis) 4,970 4,407 4,045 11,191 9,076 8,453 Income tax expense (FTE basis) 1,882 1,632 1,475 4,238 3,347 3,114 Net income $ 3,088 $ 2,775 $ 2,570 $ 6,953 $ 5,729 $ 5,339 Period-end total assets $ 284,321 $ 298,931 $ 424,533 $ 408,330 Global Markets All Other 2017 2016 2015 2017 2016 2015 Net interest income (FTE basis) $ 3,744 $ 4,558 $ 4,191 $ 864 $ 918 $ 457 Noninterest income (loss) 12,207 11,532 10,822 (1,648 ) (233 ) 1,210 Total revenue, net of interest expense (FTE basis) 15,951 16,090 15,013 (784 ) 685 1,667 Provision for credit losses 164 31 99 (561 ) (100 ) (21 ) Noninterest expense 10,731 10,169 11,374 4,065 5,599 5,113 Income (loss) before income taxes (FTE basis) 5,056 5,890 3,540 (4,288 ) (4,814 ) (3,425 ) Income tax expense (benefit) (FTE basis) 1,763 2,072 1,117 (979 ) (3,142 ) (2,354 ) Net income (loss) $ 3,293 $ 3,818 $ 2,423 $ (3,309 ) $ (1,672 ) $ (1,071 ) Period-end total assets $ 629,007 $ 566,060 $ 194,048 $ 212,413 Business Segment Reconciliations 2017 2016 2015 Segments’ total revenue, net of interest expense (FTE basis) $ 89,061 $ 83,916 $ 82,187 Adjustments (2) : ALM activities 312 (300 ) (208 ) Liquidating businesses and other (1,096 ) 985 1,875 FTE basis adjustment (925 ) (900 ) (889 ) Consolidated revenue, net of interest expense $ 87,352 $ 83,701 $ 82,965 Segments’ total net income 21,541 19,494 16,981 Adjustments, net-of-taxes (2) : ALM activities (355 ) (651 ) (694 ) Liquidating businesses and other (2,954 ) (1,021 ) (377 ) Consolidated net income $ 18,232 $ 17,822 $ 15,910 December 31 2017 2016 Segments’ total assets $ 2,087,186 $ 1,975,654 Adjustments (2) : ALM activities, including securities portfolio 625,488 612,996 Liquidating businesses and other (3) 89,008 118,073 Elimination of segment asset allocations to match liabilities (520,448 ) (518,656 ) Consolidated total assets $ 2,281,234 $ 2,188,067 (1) There were no material intersegment revenues. (2) Adjustments include consolidated income, expense and asset amounts not specifically allocated to individual business segments. (3) At December 31, 2016 , includes assets of the non-U.S. consumer credit card business which were included in assets of business held for sale on the Consolidated Balance Sheet.

Parent Company Information (Tab

Parent Company Information (Tables)	12 Months Ended
	Dec. 31, 2017
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Statement of Income	The following tables present the Parent Company-only financial information. This financial information is presented in accordance with bank regulatory reporting requirements. Condensed Statement of Income (Dollars in millions) 2017 2016 2015 Income Dividends from subsidiaries: Bank holding companies and related subsidiaries $ 12,088 $ 4,127 $ 18,970 Nonbank companies and related subsidiaries 202 77 53 Interest from subsidiaries 7,043 2,996 2,004 Other income (loss) 28 111 (623 ) Total income 19,361 7,311 20,404 Expense Interest on borrowed funds from related subsidiaries 189 969 1,169 Other interest expense 5,555 5,096 5,098 Noninterest expense 1,672 2,704 4,631 Total expense 7,416 8,769 10,898 Income (loss) before income taxes and equity in undistributed earnings of subsidiaries 11,945 (1,458 ) 9,506 Income tax expense (benefit) 950 (2,311 ) (3,532 ) Income before equity in undistributed earnings of subsidiaries 10,995 853 13,038 Equity in undistributed earnings (losses) of subsidiaries: Bank holding companies and related subsidiaries 8,725 16,817 3,068 Nonbank companies and related subsidiaries (1,488 ) 152 (196 ) Total equity in undistributed earnings (losses) of subsidiaries 7,237 16,969 2,872 Net income $ 18,232 $ 17,822 $ 15,910
Balance Sheet	Condensed Balance Sheet December 31 (Dollars in millions) 2017 2016 Assets Cash held at bank subsidiaries (1) $ 4,747 $ 20,248 Securities 596 909 Receivables from subsidiaries: Bank holding companies and related subsidiaries 146,566 117,072 Banks and related subsidiaries 146 171 Nonbank companies and related subsidiaries 4,745 26,500 Investments in subsidiaries: Bank holding companies and related subsidiaries 296,506 287,416 Nonbank companies and related subsidiaries 5,225 6,875 Other assets 14,554 11,038 Total assets (2) $ 473,085 $ 470,229 Liabilities and shareholders’ equity Accrued expenses and other liabilities $ 10,286 $ 14,284 Payables to subsidiaries: Banks and related subsidiaries 359 352 Bank holding companies and related subsidiaries 1 4,013 Nonbank companies and related subsidiaries 9,340 12,010 Long-term debt 185,953 173,375 Total liabilities 205,939 204,034 Shareholders’ equity 267,146 266,195 Total liabilities and shareholders’ equity $ 473,085 $ 470,229 (1) Balance includes third-party cash held of $193 million and $342 million at December 31, 2017 and 2016 . (2) During 2016 , the Corporation entered into intercompany arrangements with certain key subsidiaries under which the Corporation transferred certain parent company assets to NB Holdings Corporation.
Statement of Cash Flows	Condensed Statement of Cash Flows (Dollars in millions) 2017 2016 2015 Operating activities Net income $ 18,232 $ 17,822 $ 15,910 Reconciliation of net income to net cash provided by (used in) operating activities: Equity in undistributed (earnings) losses of subsidiaries (7,237 ) (16,969 ) (2,872 ) Other operating activities, net (2,593 ) (2,860 ) (2,583 ) Net cash provided by (used in) operating activities 8,402 (2,007 ) 10,455 Investing activities Net sales of securities 312 — 15 Net payments to subsidiaries (7,087 ) (65,481 ) (7,944 ) Other investing activities, net (1 ) (308 ) 70 Net cash used in investing activities (6,776 ) (65,789 ) (7,859 ) Financing activities Net decrease in short-term borrowings — (136 ) (221 ) Net decrease in other advances (6,672 ) (44 ) (770 ) Proceeds from issuance of long-term debt 37,704 27,363 26,492 Retirement of long-term debt (29,645 ) (30,804 ) (27,393 ) Proceeds from issuance of preferred stock — 2,947 2,964 Common stock repurchased (12,814 ) (5,112 ) (2,374 ) Cash dividends paid (5,700 ) (4,194 ) (3,574 ) Net cash used in financing activities (17,127 ) (9,980 ) (4,876 ) Net decrease in cash held at bank subsidiaries (15,501 ) (77,776 ) (2,280 ) Cash held at bank subsidiaries at January 1 20,248 98,024 100,304 Cash held at bank subsidiaries at December 31 $ 4,747 $ 20,248 $ 98,024

Performance by Geographical A57

Performance by Geographical Area (Tables)	12 Months Ended
	Dec. 31, 2017
Segments, Geographical Areas [Abstract]
Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas	(Dollars in millions) Total Assets at Year End (1) Total Revenue, Net of Interest Expense (2) Income Before Income Taxes Net Income U.S. (3) 2017 $ 1,965,490 $ 74,830 $ 25,108 $ 15,550 2016 1,901,043 72,418 22,282 16,183 2015 72,117 20,181 14,711 Asia 2017 103,255 3,405 676 464 2016 85,410 3,365 674 488 2015 3,524 726 457 Europe, Middle East and Africa 2017 189,661 7,907 2,990 1,926 2016 174,934 6,608 1,705 925 2015 6,081 938 516 Latin America and the Caribbean 2017 22,828 1,210 439 292 2016 26,680 1,310 360 226 2015 1,243 342 226 Total Non-U.S. 2017 315,744 12,522 4,105 2,682 2016 287,024 11,283 2,739 1,639 2015 10,848 2,006 1,199 Total Consolidated 2017 $ 2,281,234 $ 87,352 $ 29,213 $ 18,232 2016 2,188,067 83,701 25,021 17,822 2015 82,965 22,187 15,910 (1) Total assets include long-lived assets, which are primarily located in the U.S. (2) There were no material intercompany revenues between geographic regions for any of the periods presented. (3) Substantially reflects the U.S.

Summary of Significant Accoun58

Summary of Significant Accounting Principles - Principles of Consolidation and Basis of Presentation (Details) - USD ($) $ in Millions	Jun. 01, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income tax expense (benefit)		$ 10,981	$ 7,199	$ 6,277
Loans and leases			9,214
Goodwill			775
Disposal Group, Disposed of by Sale, Not Discontinued Operations | International Consumer Credit Card Business
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on sale of business, net of tax	$ 103
Gain on sale of business	793
Proceeds from sale	10,900
Loans and leases	9,800		9,200
Goodwill	775		$ 775
Disposal Group, Disposed of by Sale, Not Discontinued Operations | International Consumer Credit Card Business | Foreign Exchange Contract
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income tax expense (benefit)	$ 690

Summary of Significant Accoun59

Summary of Significant Accounting Principles - Change in Tax Law (Details) $ in Millions	12 Months Ended
	Dec. 31, 2017USD ($)
Accounting Policies [Abstract]
Estimated incremental income tax expense	$ 1,900
Adjustment of deferred tax asset	$ 946

Summary of Significant Accoun60

Summary of Significant Accounting Principles - Change in Accounting Method (Details) $ in Millions	Jan. 01, 2015USD ($)
Stock-Based Compensation Awards
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of change in retained earnings	$ (635)

Summary of Significant Accoun61

Summary of Significant Accounting Principles - New Accounting Pronouncements (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Share-based payment award tax benefit		$ 236
Investment banking income		6,011	$ 5,241	$ 5,572
Noninterest expense		$ 54,743	$ 55,083	$ 57,617
Accounting Standards Update 2014-14 | Forecast
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Investment banking income	$ 200
Noninterest expense	$ 200

Summary of Significant Accoun62

Summary of Significant Accounting Principles - Collateral (Details) - USD ($) $ in Billions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Accounting Policies [Abstract]
Securities held as collateral, fair value	$ 561.9	$ 452.1
Securities received as collateral, amount re-pledged and sold	$ 476.1	$ 372

Summary of Significant Accoun63

Summary of Significant Accounting Principles - Loans and Leases (Details)	12 Months Ended
	Dec. 31, 2017portfolio_segment
Accounting Policies [Abstract]
Number of portfolio segments	3

Summary of Significant Accoun64

Summary of Significant Accounting Principles - Allowance for Credit Losses (Details)	12 Months Ended
	Dec. 31, 2017
Home equity lines of credit | Second Mortgage
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Loss severity	100.00%

Summary of Significant Accoun65

Summary of Significant Accounting Principles - Nonperforming Loans and Leases, Charge-offs and Delinquencies (Details)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment, Past Due [Line Items]
Threshold period past due for nonperforming status of financing receivables	90 days	90 days
Consumer Portfolio Segment | Personal Property Secured Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Threshold period past due for write-off of financing receivable	120 days
Consumer Portfolio Segment | Personal Property Secured Loans | Chapter Seven Bankruptcy
Financing Receivable, Recorded Investment, Past Due [Line Items]
Threshold period past due for write-off of financing receivable	60 days
Consumer Portfolio Segment | Credit Card and Other Unsecured Consumer Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Threshold period past due for write-off of financing receivable	180 days
Consumer Portfolio Segment | Credit Card and Other Unsecured Consumer Loans | Death, Bankruptcy or Fraud
Financing Receivable, Recorded Investment, Past Due [Line Items]
Threshold period past due for write-off of financing receivable	60 days
Consumer real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Threshold period past due for write-off of financing receivable	180 days
Consumer real estate | Death, Bankruptcy or Fraud
Financing Receivable, Recorded Investment, Past Due [Line Items]
Threshold period past due for write-off of financing receivable	60 days
Consumer real estate | Residential Mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Threshold period past due for nonperforming status of financing receivables	90 days
Consumer real estate | Junior Lien Home Equity Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Threshold period past due for nonperforming status of financing receivables	90 days
Commercial Portfolio Segment
Financing Receivable, Recorded Investment, Past Due [Line Items]
Threshold period past due for nonperforming status of financing receivables	90 days
Commercial Portfolio Segment | Business Card Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Threshold period past due for write-off of financing receivable	180 days
Commercial Portfolio Segment | Business Card Loans | Death, Bankruptcy or Fraud
Financing Receivable, Recorded Investment, Past Due [Line Items]
Threshold period past due for write-off of financing receivable	60 days
Credit card and other consumer | Credit Card and Other Unsecured Consumer Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Threshold period past due for write-off of renegotiated financing receivable placed on a fixed payment plan	120 days

Summary of Significant Accoun66

Summary of Significant Accounting Principles - Premises and Equipment (Details)	12 Months Ended
	Dec. 31, 2017
Building
Property, Plant and Equipment [Line Items]
Premises and equipment, estimated useful lives	40 years
Furniture and Equipment
Property, Plant and Equipment [Line Items]
Premises and equipment, estimated useful lives	12 years

Summary of Significant Accoun67

Summary of Significant Accounting Principles - Revenue Recognition (Details)	12 Months Ended
	Dec. 31, 2017
Accounting Policies [Abstract]
Threshold period uncollected fees for write-off on card receivables	180 days
Threshold period for uncollected fees for service charges on card receivables	60 days

Summary of Significant Accoun68

Summary of Significant Accounting Principles - Credit Card and Deposit Arrangements (Details)	12 Months Ended
	Dec. 31, 2017
Accounting Policies [Abstract]
Endorsing organization agreements, term (five years or more)	5 years

Derivatives - Derivative Balanc

Derivatives - Derivative Balances (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Gross Derivative Assets
Gross Derivative Assets	$ 351,600	$ 631,100
Less: Legally enforceable master netting agreements	(279,200)	(545,300)
Less: Cash collateral received/paid	(34,600)	(43,300)
Derivative assets	37,762	42,512
Gross Derivative Liabilities
Gross Derivative Liabilities	346,000	628,300
Less: Legally enforceable master netting agreements	(279,200)	(545,300)
Less: Cash collateral received/paid	(32,500)	(43,500)
Derivative liabilities	34,300	39,480
Interest Rate Swap
Maximum Payout/Notional
Contract/Notional	15,416,400	16,977,700
Gross Derivative Assets
Gross Derivative Assets	178,000	390,900
Gross Derivative Liabilities
Gross Derivative Liabilities	174,200	388,900
Interest Rate Futures and Forwards
Maximum Payout/Notional
Contract/Notional	4,332,400	5,609,500
Gross Derivative Assets
Gross Derivative Assets	500	2,200
Gross Derivative Liabilities
Gross Derivative Liabilities	500	2,100
Interest Rate Options | Written options
Maximum Payout/Notional
Contract/Notional	1,170,500	1,146,200
Gross Derivative Assets
Gross Derivative Assets	0	0
Gross Derivative Liabilities
Gross Derivative Liabilities	35,500	52,200
Interest Rate Options | Purchased options
Maximum Payout/Notional
Contract/Notional	1,184,500	1,178,700
Gross Derivative Assets
Gross Derivative Assets	37,600	53,300
Gross Derivative Liabilities
Gross Derivative Liabilities	0	0
Foreign Exchange Swaps
Maximum Payout/Notional
Contract/Notional	2,011,100	1,828,600
Gross Derivative Assets
Gross Derivative Assets	37,800	58,800
Gross Derivative Liabilities
Gross Derivative Liabilities	38,800	65,000
Foreign Exchange Spot Future and Forwards
Maximum Payout/Notional
Contract/Notional	3,543,300	3,410,700
Gross Derivative Assets
Gross Derivative Assets	39,800	60,500
Gross Derivative Liabilities
Gross Derivative Liabilities	39,900	57,400
Foreign Exchange Options | Written options
Maximum Payout/Notional
Contract/Notional	291,800	356,600
Gross Derivative Assets
Gross Derivative Assets	0	0
Gross Derivative Liabilities
Gross Derivative Liabilities	5,100	9,400
Foreign Exchange Options | Purchased options
Maximum Payout/Notional
Contract/Notional	271,900	342,400
Gross Derivative Assets
Gross Derivative Assets	4,600	8,900
Gross Derivative Liabilities
Gross Derivative Liabilities	0	0
Equity Swaps
Maximum Payout/Notional
Contract/Notional	265,600	189,700
Gross Derivative Assets
Gross Derivative Assets	4,800	3,400
Gross Derivative Liabilities
Gross Derivative Liabilities	4,400	4,000
Equity Futures and Forwards
Maximum Payout/Notional
Contract/Notional	106,900	68,700
Gross Derivative Assets
Gross Derivative Assets	1,500	900
Gross Derivative Liabilities
Gross Derivative Liabilities	900	900
Equity Options | Written options
Maximum Payout/Notional
Contract/Notional	480,800	431,500
Gross Derivative Assets
Gross Derivative Assets	0	0
Gross Derivative Liabilities
Gross Derivative Liabilities	23,900	21,400
Equity Options | Purchased options
Maximum Payout/Notional
Contract/Notional	428,200	385,500
Gross Derivative Assets
Gross Derivative Assets	24,700	23,900
Gross Derivative Liabilities
Gross Derivative Liabilities	0	0
Commodity Swaps
Maximum Payout/Notional
Contract/Notional	46,100	48,200
Gross Derivative Assets
Gross Derivative Assets	1,800	2,500
Gross Derivative Liabilities
Gross Derivative Liabilities	4,600	5,100
Commodity Futures and Forwards
Maximum Payout/Notional
Contract/Notional	47,100	49,100
Gross Derivative Assets
Gross Derivative Assets	3,500	3,600
Gross Derivative Liabilities
Gross Derivative Liabilities	600	500
Commodity Options | Written options
Maximum Payout/Notional
Contract/Notional	21,700	29,300
Gross Derivative Assets
Gross Derivative Assets	0	0
Gross Derivative Liabilities
Gross Derivative Liabilities	1,400	1,900
Commodity Options | Purchased options
Maximum Payout/Notional
Contract/Notional	22,900	28,900
Gross Derivative Assets
Gross Derivative Assets	1,400	2,000
Gross Derivative Liabilities
Gross Derivative Liabilities	0	0
Credit Default Swap | Purchased credit derivatives
Maximum Payout/Notional
Contract/Notional	470,900	604,000
Gross Derivative Assets
Gross Derivative Assets	4,100	8,100
Gross Derivative Liabilities
Gross Derivative Liabilities	11,100	10,300
Credit Default Swap | Written credit derivatives
Maximum Payout/Notional
Contract/Notional	448,201	614,355
Gross Derivative Assets
Gross Derivative Assets	10,600	10,700
Gross Derivative Liabilities
Gross Derivative Liabilities	3,586	7,463
Total return swaps/options | Purchased credit derivatives
Maximum Payout/Notional
Contract/Notional	54,100	21,200
Gross Derivative Assets
Gross Derivative Assets	100	400
Gross Derivative Liabilities
Gross Derivative Liabilities	1,300	1,500
Total return swaps/options | Written credit derivatives
Maximum Payout/Notional
Contract/Notional	55,223	25,354
Gross Derivative Assets
Gross Derivative Assets	800	1,000
Gross Derivative Liabilities
Gross Derivative Liabilities	183	156
Credit derivatives | Purchased credit derivatives
Gross Derivative Liabilities
Fair value, with identical underlying referenced names and terms	6,400	2,200
Notional amount, with identical underlying referenced names and terms	435,100	548,900
Credit derivatives | Written credit derivatives
Maximum Payout/Notional
Contract/Notional	503,424	639,709
Gross Derivative Liabilities
Gross Derivative Liabilities	3,769	7,619
Trading and Other Risk Management Derivatives
Gross Derivative Assets
Gross Derivative Assets	345,800	619,300
Gross Derivative Liabilities
Gross Derivative Liabilities	340,800	619,300
Trading and Other Risk Management Derivatives | Interest Rate Swap
Gross Derivative Assets
Gross Derivative Assets	175,100	385,000
Gross Derivative Liabilities
Gross Derivative Liabilities	172,500	386,900
Trading and Other Risk Management Derivatives | Interest Rate Futures and Forwards
Gross Derivative Assets
Gross Derivative Assets	500	2,200
Gross Derivative Liabilities
Gross Derivative Liabilities	500	2,100
Trading and Other Risk Management Derivatives | Interest Rate Options | Written options
Gross Derivative Assets
Gross Derivative Assets	0	0
Gross Derivative Liabilities
Gross Derivative Liabilities	35,500	52,200
Trading and Other Risk Management Derivatives | Interest Rate Options | Purchased options
Gross Derivative Assets
Gross Derivative Assets	37,600	53,300
Gross Derivative Liabilities
Gross Derivative Liabilities	0	0
Trading and Other Risk Management Derivatives | Foreign Exchange Swaps
Gross Derivative Assets
Gross Derivative Assets	35,600	54,600
Gross Derivative Liabilities
Gross Derivative Liabilities	36,100	58,800
Trading and Other Risk Management Derivatives | Foreign Exchange Spot Future and Forwards
Gross Derivative Assets
Gross Derivative Assets	39,100	58,800
Gross Derivative Liabilities
Gross Derivative Liabilities	39,100	56,600
Trading and Other Risk Management Derivatives | Foreign Exchange Options | Written options
Gross Derivative Assets
Gross Derivative Assets	0	0
Gross Derivative Liabilities
Gross Derivative Liabilities	5,100	9,400
Trading and Other Risk Management Derivatives | Foreign Exchange Options | Purchased options
Gross Derivative Assets
Gross Derivative Assets	4,600	8,900
Gross Derivative Liabilities
Gross Derivative Liabilities	0	0
Trading and Other Risk Management Derivatives | Equity Swaps
Gross Derivative Assets
Gross Derivative Assets	4,800	3,400
Gross Derivative Liabilities
Gross Derivative Liabilities	4,400	4,000
Trading and Other Risk Management Derivatives | Equity Futures and Forwards
Gross Derivative Assets
Gross Derivative Assets	1,500	900
Gross Derivative Liabilities
Gross Derivative Liabilities	900	900
Trading and Other Risk Management Derivatives | Equity Options | Written options
Gross Derivative Assets
Gross Derivative Assets	0	0
Gross Derivative Liabilities
Gross Derivative Liabilities	23,900	21,400
Trading and Other Risk Management Derivatives | Equity Options | Purchased options
Gross Derivative Assets
Gross Derivative Assets	24,700	23,900
Gross Derivative Liabilities
Gross Derivative Liabilities	0	0
Trading and Other Risk Management Derivatives | Commodity Swaps
Gross Derivative Assets
Gross Derivative Assets	1,800	2,500
Gross Derivative Liabilities
Gross Derivative Liabilities	4,600	5,100
Trading and Other Risk Management Derivatives | Commodity Futures and Forwards
Gross Derivative Assets
Gross Derivative Assets	3,500	3,600
Gross Derivative Liabilities
Gross Derivative Liabilities	600	500
Trading and Other Risk Management Derivatives | Commodity Options | Written options
Gross Derivative Assets
Gross Derivative Assets	0	0
Gross Derivative Liabilities
Gross Derivative Liabilities	1,400	1,900
Trading and Other Risk Management Derivatives | Commodity Options | Purchased options
Gross Derivative Assets
Gross Derivative Assets	1,400	2,000
Gross Derivative Liabilities
Gross Derivative Liabilities	0	0
Trading and Other Risk Management Derivatives | Credit Default Swap | Purchased credit derivatives
Gross Derivative Assets
Gross Derivative Assets	4,100	8,100
Gross Derivative Liabilities
Gross Derivative Liabilities	11,100	10,300
Trading and Other Risk Management Derivatives | Credit Default Swap | Written credit derivatives
Gross Derivative Assets
Gross Derivative Assets	10,600	10,700
Gross Derivative Liabilities
Gross Derivative Liabilities	3,600	7,500
Trading and Other Risk Management Derivatives | Total return swaps/options | Purchased credit derivatives
Gross Derivative Assets
Gross Derivative Assets	100	400
Gross Derivative Liabilities
Gross Derivative Liabilities	1,300	1,500
Trading and Other Risk Management Derivatives | Total return swaps/options | Written credit derivatives
Gross Derivative Assets
Gross Derivative Assets	800	1,000
Gross Derivative Liabilities
Gross Derivative Liabilities	200	200
Qualifying Accounting Hedges
Gross Derivative Assets
Gross Derivative Assets	5,800	11,800
Gross Derivative Liabilities
Gross Derivative Liabilities	5,200	9,000
Qualifying Accounting Hedges | Interest Rate Swap
Gross Derivative Assets
Gross Derivative Assets	2,900	5,900
Gross Derivative Liabilities
Gross Derivative Liabilities	1,700	2,000
Qualifying Accounting Hedges | Interest Rate Futures and Forwards
Gross Derivative Assets
Gross Derivative Assets	0	0
Gross Derivative Liabilities
Gross Derivative Liabilities	0	0
Qualifying Accounting Hedges | Interest Rate Options | Written options
Gross Derivative Assets
Gross Derivative Assets	0	0
Gross Derivative Liabilities
Gross Derivative Liabilities	0	0
Qualifying Accounting Hedges | Interest Rate Options | Purchased options
Gross Derivative Assets
Gross Derivative Assets	0	0
Gross Derivative Liabilities
Gross Derivative Liabilities	0	0
Qualifying Accounting Hedges | Foreign Exchange Swaps
Gross Derivative Assets
Gross Derivative Assets	2,200	4,200
Gross Derivative Liabilities
Gross Derivative Liabilities	2,700	6,200
Qualifying Accounting Hedges | Foreign Exchange Spot Future and Forwards
Gross Derivative Assets
Gross Derivative Assets	700	1,700
Gross Derivative Liabilities
Gross Derivative Liabilities	800	800
Qualifying Accounting Hedges | Foreign Exchange Options | Written options
Gross Derivative Assets
Gross Derivative Assets	0	0
Gross Derivative Liabilities
Gross Derivative Liabilities	0	0
Qualifying Accounting Hedges | Foreign Exchange Options | Purchased options
Gross Derivative Assets
Gross Derivative Assets	0	0
Gross Derivative Liabilities
Gross Derivative Liabilities	0	0
Qualifying Accounting Hedges | Equity Swaps
Gross Derivative Assets
Gross Derivative Assets	0	0
Gross Derivative Liabilities
Gross Derivative Liabilities	0	0
Qualifying Accounting Hedges | Equity Futures and Forwards
Gross Derivative Assets
Gross Derivative Assets	0	0
Gross Derivative Liabilities
Gross Derivative Liabilities	0	0
Qualifying Accounting Hedges | Equity Options | Written options
Gross Derivative Assets
Gross Derivative Assets	0	0
Gross Derivative Liabilities
Gross Derivative Liabilities	0	0
Qualifying Accounting Hedges | Equity Options | Purchased options
Gross Derivative Assets
Gross Derivative Assets	0	0
Gross Derivative Liabilities
Gross Derivative Liabilities	0	0
Qualifying Accounting Hedges | Commodity Swaps
Gross Derivative Assets
Gross Derivative Assets	0	0
Gross Derivative Liabilities
Gross Derivative Liabilities	0	0
Qualifying Accounting Hedges | Commodity Futures and Forwards
Gross Derivative Assets
Gross Derivative Assets	0	0
Gross Derivative Liabilities
Gross Derivative Liabilities	0	0
Qualifying Accounting Hedges | Commodity Options | Written options
Gross Derivative Assets
Gross Derivative Assets	0	0
Gross Derivative Liabilities
Gross Derivative Liabilities	0	0
Qualifying Accounting Hedges | Commodity Options | Purchased options
Gross Derivative Assets
Gross Derivative Assets	0	0
Gross Derivative Liabilities
Gross Derivative Liabilities	0	0
Qualifying Accounting Hedges | Credit Default Swap | Purchased credit derivatives
Gross Derivative Assets
Gross Derivative Assets	0	0
Gross Derivative Liabilities
Gross Derivative Liabilities	0	0
Qualifying Accounting Hedges | Credit Default Swap | Written credit derivatives
Gross Derivative Assets
Gross Derivative Assets	0	0
Gross Derivative Liabilities
Gross Derivative Liabilities	0	0
Qualifying Accounting Hedges | Total return swaps/options | Purchased credit derivatives
Gross Derivative Assets
Gross Derivative Assets	0	0
Gross Derivative Liabilities
Gross Derivative Liabilities	0	0
Qualifying Accounting Hedges | Total return swaps/options | Written credit derivatives
Gross Derivative Assets
Gross Derivative Assets	0	0
Gross Derivative Liabilities
Gross Derivative Liabilities	$ 0	$ 0

Derivatives - Offsetting Assets

Derivatives - Offsetting Assets (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Offsetting Assets [Line Items]
Derivative assets, after netting	$ 25,600	$ 31,900
Other gross derivative assets	12,200	10,600
Derivative assets	37,762	42,512
Less: Financial instruments collateral	(11,200)	(13,500)
Total net derivative assets	26,600	29,000
Over-the-counter
Offsetting Assets [Line Items]
Total gross derivative assets, before netting	320,700	426,200
Less: Legally enforceable master netting agreements and cash collateral received	(296,900)	(398,200)
Exchange-traded
Offsetting Assets [Line Items]
Total gross derivative assets, before netting	9,800	12,500
Less: Legally enforceable master netting agreements and cash collateral received	(8,600)	(8,900)
Over-the-counter cleared
Offsetting Assets [Line Items]
Total gross derivative assets, before netting	8,900	181,800
Less: Legally enforceable master netting agreements and cash collateral received	(8,300)	(181,500)
Interest rate contracts | Over-the-counter
Offsetting Assets [Line Items]
Total gross derivative assets, before netting	211,700	267,300
Interest rate contracts | Over-the-counter cleared
Offsetting Assets [Line Items]
Total gross derivative assets, before netting	1,900	177,200
Foreign exchange risk | Over-the-counter
Offsetting Assets [Line Items]
Total gross derivative assets, before netting	78,700	124,300
Foreign exchange risk | Over-the-counter cleared
Offsetting Assets [Line Items]
Total gross derivative assets, before netting	900	300
Equity contracts | Over-the-counter
Offsetting Assets [Line Items]
Total gross derivative assets, before netting	18,300	15,600
Equity contracts | Exchange-traded
Offsetting Assets [Line Items]
Total gross derivative assets, before netting	9,100	11,400
Commodity contracts | Over-the-counter
Offsetting Assets [Line Items]
Total gross derivative assets, before netting	2,900	3,700
Commodity contracts | Exchange-traded
Offsetting Assets [Line Items]
Total gross derivative assets, before netting	700	1,100
Credit derivatives
Offsetting Assets [Line Items]
Total gross derivative assets, before netting	46	43
Credit derivatives | Over-the-counter
Offsetting Assets [Line Items]
Total gross derivative assets, before netting	9,100	15,300
Credit derivatives | Over-the-counter cleared
Offsetting Assets [Line Items]
Total gross derivative assets, before netting	$ 6,100	$ 4,300

Derivatives - Offsetting Liabil

Derivatives - Offsetting Liabilities (Details) $ in Millions	12 Months Ended
	Dec. 31, 2017USD ($)counterparty	Dec. 31, 2016USD ($)
Offsetting Liabilities [Line Items]
Derivative liabilities, after netting	$ 23,100	$ 28,600
Other gross derivative liabilities	11,200	10,900
Derivative liabilities	34,300	39,480
Less: Financial instruments collateral	(10,400)	(10,500)
Total net derivative liabilities	$ 23,900	29,000
Number of central clearing counterparties to re-characterize daily cash variation margin | counterparty	2
Over-the-counter
Offsetting Liabilities [Line Items]
Total gross derivative liabilities, before netting	$ 317,000	418,200
Less: Legally enforceable master netting agreements and cash collateral paid	(294,600)	(392,600)
Exchange-traded
Offsetting Liabilities [Line Items]
Total gross derivative liabilities, before netting	9,300	11,800
Less: Legally enforceable master netting agreements and cash collateral paid	(8,600)	(8,900)
Over-the-counter cleared
Offsetting Liabilities [Line Items]
Total gross derivative liabilities, before netting	8,500	187,400
Less: Legally enforceable master netting agreements and cash collateral paid	(8,500)	(187,300)
Interest rate contracts | Over-the-counter
Offsetting Liabilities [Line Items]
Total gross derivative liabilities, before netting	206,000	258,200
Interest rate contracts | Over-the-counter cleared
Offsetting Liabilities [Line Items]
Total gross derivative liabilities, before netting	1,800	182,800
Foreign exchange risk | Over-the-counter
Offsetting Liabilities [Line Items]
Total gross derivative liabilities, before netting	80,800	126,700
Foreign exchange risk | Over-the-counter cleared
Offsetting Liabilities [Line Items]
Total gross derivative liabilities, before netting	700	300
Equity contracts | Over-the-counter
Offsetting Liabilities [Line Items]
Total gross derivative liabilities, before netting	16,200	13,700
Equity contracts | Exchange-traded
Offsetting Liabilities [Line Items]
Total gross derivative liabilities, before netting	8,500	10,800
Commodity contracts | Over-the-counter
Offsetting Liabilities [Line Items]
Total gross derivative liabilities, before netting	4,400	4,900
Commodity contracts | Exchange-traded
Offsetting Liabilities [Line Items]
Total gross derivative liabilities, before netting	800	1,000
Credit derivatives
Offsetting Liabilities [Line Items]
Total gross derivative liabilities, before netting	3	10
Credit derivatives | Over-the-counter
Offsetting Liabilities [Line Items]
Total gross derivative liabilities, before netting	9,600	14,700
Credit derivatives | Over-the-counter cleared
Offsetting Liabilities [Line Items]
Total gross derivative liabilities, before netting	$ 6,000	$ 4,300

Derivatives - Derivatives Desig

Derivatives - Derivatives Designated as Fair Value Hedges (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Effect of Fair Value Hedges on Results of Operations [Abstract]
Derivative	$ 207	$ (2,202)	$ (2,511)
Hedged Item	(687)	1,304	1,608
Hedge Ineffectiveness	(480)	(898)	(903)
Interest rate risk on long-term debt | Interest expense
Effect of Fair Value Hedges on Results of Operations [Abstract]
Derivative	(1,537)	(1,488)	(718)
Hedged Item	1,045	646	(77)
Hedge Ineffectiveness	(492)	(842)	(795)
Interest rate and foreign currency risk on long-term debt | Interest expense
Effect of Fair Value Hedges on Results of Operations [Abstract]
Derivative	1,811	(941)	(1,898)
Hedged Item	(1,767)	944	1,812
Hedge Ineffectiveness	44	3	(86)
Interest rate risk on AFS securities | Interest income
Effect of Fair Value Hedges on Results of Operations [Abstract]
Derivative	(67)	227	105
Hedged Item	35	(286)	(127)
Hedge Ineffectiveness	$ (32)	$ (59)	$ (22)

Derivatives - Derivatives Des73

Derivatives - Derivatives Designated as Cash Flow and Net Investment Hedges (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Cash flow hedges
Derivative Instruments, Gain (Loss) [Line Items]
Gains (Losses) Recognized in Accumulated OCI on Derivatives	$ (50)	$ (299)	$ 55
Gains (Losses) in Income Reclassified from Accumulated OCI	(179)	(585)	(883)
Interest rate risk on variable-rate portfolios | Cash flow hedges
Derivative Instruments, Gain (Loss) [Line Items]
Gains (Losses) Recognized in Accumulated OCI on Derivatives	(109)	(340)	95
Gains (Losses) in Income Reclassified from Accumulated OCI	(327)	(553)	(974)
Price risk on restricted stock awards | Cash flow hedges
Derivative Instruments, Gain (Loss) [Line Items]
Gains (Losses) Recognized in Accumulated OCI on Derivatives	59	41	(40)
Gains (Losses) in Income Reclassified from Accumulated OCI	148	(32)	91
Foreign exchange risk | Net investment hedges
Derivative Instruments, Gain (Loss) [Line Items]
Gains (Losses) Recognized in Accumulated OCI on Derivatives	(1,588)	1,636	3,010
Gains (Losses) in Income Reclassified from Accumulated OCI	1,782	3	153
Hedge Ineffectiveness and Amounts Excluded from Effectiveness Testing	$ (120)	$ (325)	$ (298)

Derivatives - Other Risk Manage

Derivatives - Other Risk Management Derivatives (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Interest rate lock commitments
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivatives not designated as hedging	$ 220	$ 533	$ 714
Mortgage banking income | Interest rate risk on mortgage banking income
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivatives not designated as hedging	8	461	254
Other income | Credit risk on loans
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivatives not designated as hedging	(6)	(107)	(22)
Other income | Interest rate and foreign currency risk on ALM activities
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivatives not designated as hedging	(36)	(754)	(222)
Personnel expense | Price risk on restricted stock awards
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivatives not designated as hedging	$ 301	$ 9	$ (267)

Derivatives - Sales and Trading

Derivatives - Sales and Trading Revenue (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Trading Activity, Gains and Losses, Net [Line Items]
Sales and trading revenue	$ 7,277	$ 6,902	$ 6,473
Brokerage commissions and asset management fee revenue | Global Markets
Trading Activity, Gains and Losses, Net [Line Items]
Sales and trading revenue	2,000	2,100	2,200
Trading Securities
Trading Activity, Gains and Losses, Net [Line Items]
Sales and trading revenue	12,541	13,204	12,020
Trading Securities | Trading Account Profits
Trading Activity, Gains and Losses, Net [Line Items]
Sales and trading revenue	6,706	6,547	6,106
Trading Securities | Net Interest Income
Trading Activity, Gains and Losses, Net [Line Items]
Sales and trading revenue	3,024	3,969	3,631
Trading Securities | Other
Trading Activity, Gains and Losses, Net [Line Items]
Sales and trading revenue	2,811	2,688	2,283
Trading Securities | Interest rate risk
Trading Activity, Gains and Losses, Net [Line Items]
Sales and trading revenue	2,542	3,327	2,364
Trading Securities | Interest rate risk | Trading Account Profits
Trading Activity, Gains and Losses, Net [Line Items]
Sales and trading revenue	1,145	1,613	1,290
Trading Securities | Interest rate risk | Net Interest Income
Trading Activity, Gains and Losses, Net [Line Items]
Sales and trading revenue	980	1,410	1,333
Trading Securities | Interest rate risk | Other
Trading Activity, Gains and Losses, Net [Line Items]
Sales and trading revenue	417	304	(259)
Trading Securities | Foreign exchange risk
Trading Activity, Gains and Losses, Net [Line Items]
Sales and trading revenue	1,254	1,196	1,195
Trading Securities | Foreign exchange risk | Trading Account Profits
Trading Activity, Gains and Losses, Net [Line Items]
Sales and trading revenue	1,417	1,360	1,322
Trading Securities | Foreign exchange risk | Net Interest Income
Trading Activity, Gains and Losses, Net [Line Items]
Sales and trading revenue	(1)	(10)	(10)
Trading Securities | Foreign exchange risk | Other
Trading Activity, Gains and Losses, Net [Line Items]
Sales and trading revenue	(162)	(154)	(117)
Trading Securities | Equity risk
Trading Activity, Gains and Losses, Net [Line Items]
Sales and trading revenue	4,068	4,011	4,323
Trading Securities | Equity risk | Trading Account Profits
Trading Activity, Gains and Losses, Net [Line Items]
Sales and trading revenue	2,689	1,917	2,115
Trading Securities | Equity risk | Net Interest Income
Trading Activity, Gains and Losses, Net [Line Items]
Sales and trading revenue	(525)	20	56
Trading Securities | Equity risk | Other
Trading Activity, Gains and Losses, Net [Line Items]
Sales and trading revenue	1,904	2,074	2,152
Trading Securities | Credit risk
Trading Activity, Gains and Losses, Net [Line Items]
Sales and trading revenue	4,365	4,243	3,698
Trading Securities | Credit risk | Trading Account Profits
Trading Activity, Gains and Losses, Net [Line Items]
Sales and trading revenue	1,251	1,250	920
Trading Securities | Credit risk | Net Interest Income
Trading Activity, Gains and Losses, Net [Line Items]
Sales and trading revenue	2,537	2,569	2,333
Trading Securities | Credit risk | Other
Trading Activity, Gains and Losses, Net [Line Items]
Sales and trading revenue	577	424	445
Trading Securities | Other risk
Trading Activity, Gains and Losses, Net [Line Items]
Sales and trading revenue	312	427	440
Trading Securities | Other risk | Trading Account Profits
Trading Activity, Gains and Losses, Net [Line Items]
Sales and trading revenue	204	407	459
Trading Securities | Other risk | Net Interest Income
Trading Activity, Gains and Losses, Net [Line Items]
Sales and trading revenue	33	(20)	(81)
Trading Securities | Other risk | Other
Trading Activity, Gains and Losses, Net [Line Items]
Sales and trading revenue	$ 75	$ 40	$ 62

Derivatives - Credit Derivative

Derivatives - Credit Derivatives (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Carrying Value of Credit Derivatives
Total	$ 346,000	$ 628,300
Carrying Value of Credit-related Notes
Less than One Year	12	70
One to Three Years	4	34
Three to Five Years	41	602
Over Five Years	2,237	2,741
Total	2,294	3,447
Credit Default Swap | Written credit derivatives
Carrying Value of Credit Derivatives
Less than One Year	207	781
One to Three Years	456	1,117
Three to Five Years	545	1,443
Over Five Years	2,378	4,122
Total	3,586	7,463
Maximum Payout/Notional
Less than One Year	100,700	205,838
One to Three Years	165,323	210,360
Three to Five Years	146,179	157,541
Over Five Years	35,999	40,616
Total	448,201	614,355
Total return swaps/options | Written credit derivatives
Carrying Value of Credit Derivatives
Less than One Year	180	143
One to Three Years	0	10
Three to Five Years	0	2
Over Five Years	3	1
Total	183	156
Maximum Payout/Notional
Less than One Year	51,145	19,430
One to Three Years	3,095	5,127
Three to Five Years	143	589
Over Five Years	840	208
Total	55,223	25,354
Credit derivatives | Written credit derivatives
Carrying Value of Credit Derivatives
Less than One Year	387	924
One to Three Years	456	1,127
Three to Five Years	545	1,445
Over Five Years	2,381	4,123
Total	3,769	7,619
Maximum Payout/Notional
Less than One Year	151,845	225,268
One to Three Years	168,418	215,487
Three to Five Years	146,322	158,130
Over Five Years	36,839	40,824
Total	503,424	639,709
Investment grade
Carrying Value of Credit-related Notes
Less than One Year	0	0
One to Three Years	0	12
Three to Five Years	7	542
Over Five Years	689	1,423
Total	696	1,977
Investment grade | Credit Default Swap | Written credit derivatives
Carrying Value of Credit Derivatives
Less than One Year	4	10
One to Three Years	3	64
Three to Five Years	61	535
Over Five Years	245	783
Total	313	1,392
Maximum Payout/Notional
Less than One Year	61,388	121,083
One to Three Years	115,480	143,200
Three to Five Years	107,081	116,540
Over Five Years	21,579	21,905
Total	305,528	402,728
Investment grade | Total return swaps/options | Written credit derivatives
Carrying Value of Credit Derivatives
Less than One Year	30	16
One to Three Years	0	0
Three to Five Years	0	0
Over Five Years	0	0
Total	30	16
Maximum Payout/Notional
Less than One Year	37,394	12,792
One to Three Years	2,581	0
Three to Five Years	0	0
Over Five Years	143	0
Total	40,118	12,792
Non-investment grade
Carrying Value of Credit-related Notes
Less than One Year	12	70
One to Three Years	4	22
Three to Five Years	34	60
Over Five Years	1,548	1,318
Total	1,598	1,470
Non-investment grade | Credit Default Swap | Written credit derivatives
Carrying Value of Credit Derivatives
Less than One Year	203	771
One to Three Years	453	1,053
Three to Five Years	484	908
Over Five Years	2,133	3,339
Total	3,273	6,071
Maximum Payout/Notional
Less than One Year	39,312	84,755
One to Three Years	49,843	67,160
Three to Five Years	39,098	41,001
Over Five Years	14,420	18,711
Total	142,673	211,627
Non-investment grade | Total return swaps/options | Written credit derivatives
Carrying Value of Credit Derivatives
Less than One Year	150	127
One to Three Years	0	10
Three to Five Years	0	2
Over Five Years	3	1
Total	153	140
Maximum Payout/Notional
Less than One Year	13,751	6,638
One to Three Years	514	5,127
Three to Five Years	143	589
Over Five Years	697	208
Total	$ 15,105	$ 12,562

Derivatives - Credit-related Co

Derivatives - Credit-related Contingent Features and Collateral (Details) $ in Millions	Dec. 31, 2017USD ($)
Derivative [Line Items]
Additional collateral required to be posted upon downgrade, one incremental notch	$ 779
Additional collateral required to be posted upon downgrade, second incremental notch	487
Credit derivatives
Derivative [Line Items]
Derivative liability subject to unilateral termination upon downgrade, one incremental notch	428
Derivative liability subject to unilateral termination upon downgrade, second incremental notch	1,163
Collateral posted subject to unilateral termination upon downgrade, one incremental notch	339
Collateral posted subject to unilateral termination upon downgrade, second incremental notch	800
Bank of America, N.A.
Derivative [Line Items]
Additional collateral required to be posted upon downgrade, one incremental notch	391
Additional collateral required to be posted upon downgrade, second incremental notch	$ 230

Derivatives - Derivative Valuat

Derivatives - Derivative Valuation Adjustments (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Gross
Derivative assets (CVA)	$ 330	$ 374	$ 255
Derivative assets/liabilities (FVA)	160	186	16
Derivative liabilities (DVA)	(324)	24	(18)
Net
Derivative assets (CVA)	98	214	227
Derivative assets/liabilities (FVA)	178	102	16
Derivative liabilities (DVA)	(281)	(141)	(153)
Cumulative credit valuation adjustment	677	1,000	1,400
Cumulative funding valuation adjustment	136	296	481
Cumulative debit valuation adjustment	$ 450	$ 774	$ 750

Derivatives - Narrative (Detail

Derivatives - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Derivative [Line Items]
Shareholders’ equity	$ 267,146	$ 266,195	$ 255,615	$ 243,476
Net losses in AOCI expected to be reclassified, after tax	130
Net losses in AOCI expected to be reclassified	$ 208
Terminated cash flow hedges, forecasted transaction hedging period	7 years
Terminated cash flow hedges, maximum forecasted transaction hedging period	19 years
Credit derivatives
Derivative [Line Items]
Derivative asset	$ 46	43
Derivative liability	3	10
Cash and securities held as collateral	77,200	85,500
Cash and securities collateral posted	59,200	71,100
Collateral not yet posted	3,200
Aggregate fair value of derivative liability	0	0
Credit derivatives | Bank of America, N.A.
Derivative [Line Items]
Collateral not yet posted	2,100
Foreign Mortgage-backed Securities and Foreign Securities
Derivative [Line Items]
Transfer of mortgage-backed securities to third-party trust	6,000	6,600
Gross cash proceeds from transfer of securities	6,000	6,600
Fair value of securities transferred	6,100	6,300
Derivatives
Derivative [Line Items]
Shareholders’ equity	(831)	$ (895)	$ (1,077)	$ (1,661)
Accumulated other comprehensive income (loss) before tax	$ (1,300)

Securities - Debt Securities an

Securities - Debt Securities and Available-for-Sale Marketable Equity Securities (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Available-for-sale Debt Securities:
Amortized Cost	$ 304,671
Amortized Cost		$ 296,579
Gross Unrealized Gains	1,078	1,280
Gross Unrealized Losses	(3,118)	(3,300)
Fair Value	302,631
Fair Value		294,559
Less: Available-for-sale securities of business held for sale		(619)
Other Debt Securities, Carried at Fair Value:
Amortized Cost	12,273	19,748
Gross Unrealized Gains	252	121
Gross Unrealized Losses	(39)	(149)
Fair Value	12,486	19,720
Debt securities carried at fair value:
Amortized Cost	316,944	315,708
Gross Unrealized Gains	1,330	1,401
Gross Unrealized Losses	(3,157)	(3,449)
Debt securities carried at fair value	315,117	313,660
Held-to-maturity Securities:
Amortized Cost	125,013	117,071
Gross Unrealized Gains	111	248
Gross Unrealized Losses	(1,825)	(2,034)
Held-to-maturity, fair value	123,299	115,285
Debt securities:
Amortized Cost	441,957	432,779
Gross Unrealized Gains	1,441	1,649
Gross Unrealized Losses	(4,982)	(5,483)
Fair Value	438,416	428,945
Nonperforming Financing Receivable
Available-for-sale Debt Securities:
Fair Value	99	121
FNMA
Debt securities carried at fair value:
Amortized Cost	163,600	156,400
Debt securities carried at fair value	162,100	154,400
FHLMC
Debt securities carried at fair value:
Amortized Cost	50,300	48,700
Debt securities carried at fair value	50,000	48,300
Other assets
Available-for-sale Equity Securities:
Amortized Cost	27	325
Gross Unrealized Gains	0	51
Gross Unrealized Losses	(2)	(1)
Fair Value	25	375
Mortgage-backed securities
Available-for-sale Debt Securities:
Amortized Cost	217,239	213,562
Gross Unrealized Gains	840	927
Gross Unrealized Losses	(1,993)	(2,338)
Fair Value	216,086	212,151
Other Debt Securities, Carried at Fair Value:
Fair Value	2,769	3,144
Debt securities carried at fair value:
Debt securities carried at fair value	218,855
Agency
Available-for-sale Debt Securities:
Amortized Cost	194,119	190,809
Gross Unrealized Gains	506	640
Gross Unrealized Losses	(1,696)	(1,963)
Fair Value	192,929	189,486
Debt securities carried at fair value:
Debt securities carried at fair value	192,929
Agency-collateralized mortgage obligations
Available-for-sale Debt Securities:
Amortized Cost	6,846	8,296
Gross Unrealized Gains	39	85
Gross Unrealized Losses	(81)	(51)
Fair Value	6,804	8,330
Other Debt Securities, Carried at Fair Value:
Fair Value	5	5
Debt securities carried at fair value:
Debt securities carried at fair value	6,809
Commercial
Available-for-sale Debt Securities:
Amortized Cost	13,864	12,594
Gross Unrealized Gains	28	21
Gross Unrealized Losses	(208)	(293)
Fair Value	13,684	12,322
Debt securities carried at fair value:
Debt securities carried at fair value	13,684
Non-agency residential
Available-for-sale Debt Securities:
Amortized Cost	2,410	1,863
Gross Unrealized Gains	267	181
Gross Unrealized Losses	(8)	(31)
Fair Value	2,669	2,013
Other Debt Securities, Carried at Fair Value:
Fair Value	2,764	$ 3,139
Debt securities carried at fair value:
Debt securities carried at fair value	$ 5,433
Non-agency residential | Prime
Available-for-sale Equity Securities:
Available-for-sale securities, percent held by rating	62.00%	60.00%
Non-agency residential | Alt-A
Available-for-sale Equity Securities:
Available-for-sale securities, percent held by rating	13.00%	19.00%
Non-agency residential | Subprime
Available-for-sale Equity Securities:
Available-for-sale securities, percent held by rating	25.00%	21.00%
U.S. Treasury and agency securities
Available-for-sale Debt Securities:
Amortized Cost	$ 54,523	$ 48,800
Gross Unrealized Gains	18	204
Gross Unrealized Losses	(1,018)	(752)
Fair Value	53,523	48,252
Debt securities carried at fair value:
Debt securities carried at fair value	53,523
Non-U.S. securities
Available-for-sale Debt Securities:
Amortized Cost	6,669
Amortized Cost		6,372
Gross Unrealized Gains	9	13
Gross Unrealized Losses	(1)	(3)
Fair Value	6,677
Fair Value		6,382
Other Debt Securities, Carried at Fair Value:
Fair Value	9,488	16,336
Debt securities carried at fair value:
Debt securities carried at fair value	16,165
Other taxable securities, substantially all asset-backed securities
Available-for-sale Debt Securities:
Amortized Cost	5,699	10,573
Gross Unrealized Gains	73	64
Gross Unrealized Losses	(2)	(23)
Fair Value	5,770	10,614
Other Debt Securities, Carried at Fair Value:
Fair Value	229	240
Debt securities carried at fair value:
Debt securities carried at fair value	5,999
Total taxable securities
Available-for-sale Debt Securities:
Amortized Cost	284,130
Amortized Cost		279,307
Gross Unrealized Gains	940	1,208
Gross Unrealized Losses	(3,014)	(3,116)
Fair Value	282,056
Fair Value		277,399
Debt securities carried at fair value:
Debt securities carried at fair value	294,542
Tax-exempt securities
Available-for-sale Debt Securities:
Amortized Cost	20,541	17,272
Gross Unrealized Gains	138	72
Gross Unrealized Losses	(104)	(184)
Fair Value	20,575	$ 17,160
Debt securities carried at fair value:
Debt securities carried at fair value	20,575
Debt securities
Debt securities carried at fair value:
Debt securities carried at fair value	315,117
Available-for-sale Equity Securities:
Shareholders’ equity	(1,200)
Accumulated other comprehensive income tax expense (benefit)	$ (872)

Securities - Other Debt Securit

Securities - Other Debt Securities Carried at Fair Value (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Other Debt Securities Carried at Fair Value [Line Items]
Other debt securities carried at fair value	$ 12,486	$ 19,720
Other income
Other Debt Securities Carried at Fair Value [Line Items]
Unrealized mark-to-market net gains (losses)	243	51
Realized net gains (losses)	(49)	(128)
Mortgage-backed securities
Other Debt Securities Carried at Fair Value [Line Items]
Other debt securities carried at fair value	2,769	3,144
Agency-collateralized mortgage obligations
Other Debt Securities Carried at Fair Value [Line Items]
Other debt securities carried at fair value	5	5
Non-agency residential
Other Debt Securities Carried at Fair Value [Line Items]
Other debt securities carried at fair value	2,764	3,139
Non-U.S. securities
Other Debt Securities Carried at Fair Value [Line Items]
Other debt securities carried at fair value	9,488	16,336
Other taxable securities, substantially all asset-backed securities
Other Debt Securities Carried at Fair Value [Line Items]
Other debt securities carried at fair value	$ 229	$ 240

Securities - Gains and Losses o

Securities - Gains and Losses on Sales of AFS Debt Securities (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Available-for-sale Securities, Gross Realized Gain (Loss) [Abstract]
Net gains on sales of AFS debt securities	$ 255	$ 490	$ 1,138
Debt securities
Available-for-sale Securities, Gross Realized Gain (Loss) [Abstract]
Gross gains	352	520	1,174
Gross losses	(97)	(30)	(36)
Net gains on sales of AFS debt securities	255	490	1,138
Income tax expense attributable to realized net gains on sales of AFS debt securities	$ 97	$ 186	$ 432

Securities - Temporarily Impair

Securities - Temporarily Impaired and Other-than-temporarily Impaired AFS Debt Securities (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Credit-related OTTI losses	$ 41	$ 19	$ 81
Other than temporary impairment losses recorded on debt securities	0	0	0
Cumulative credit losses on debt securities held	274	253	$ 266
Debt securities
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than Twelve Months, Fair Value	111,645	181,821
Less than Twelve Months, Gross Unrealized Losses	(693)	(3,072)
Twelve Months or Longer, Fair Value	110,109	8,856
Twelve Months or Longer, Gross Unrealized Losses	(2,425)	(228)
Total, Fair Value	221,754	190,677
Total, Gross Unrealized Losses	(3,118)	(3,300)
Temporarily impaired AFS debt securities | Debt securities
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than Twelve Months, Fair Value	111,587	181,727
Less than Twelve Months, Gross Unrealized Losses	(692)	(3,071)
Twelve Months or Longer, Fair Value	110,109	8,455
Twelve Months or Longer, Gross Unrealized Losses	(2,425)	(212)
Total, Fair Value	221,696	190,182
Total, Gross Unrealized Losses	(3,117)	(3,283)
Temporarily impaired AFS debt securities | Mortgage-backed securities
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than Twelve Months, Fair Value	82,188	147,669
Less than Twelve Months, Gross Unrealized Losses	(438)	(2,165)
Twelve Months or Longer, Fair Value	78,882	5,002
Twelve Months or Longer, Gross Unrealized Losses	(1,554)	(156)
Total, Fair Value	161,070	152,671
Total, Gross Unrealized Losses	(1,992)	(2,321)
Temporarily impaired AFS debt securities | Agency
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than Twelve Months, Fair Value	73,535	135,210
Less than Twelve Months, Gross Unrealized Losses	(352)	(1,846)
Twelve Months or Longer, Fair Value	72,612	3,770
Twelve Months or Longer, Gross Unrealized Losses	(1,344)	(117)
Total, Fair Value	146,147	138,980
Total, Gross Unrealized Losses	(1,696)	(1,963)
Temporarily impaired AFS debt securities | Agency-collateralized mortgage obligations
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than Twelve Months, Fair Value	2,743	3,229
Less than Twelve Months, Gross Unrealized Losses	(29)	(25)
Twelve Months or Longer, Fair Value	1,684	1,028
Twelve Months or Longer, Gross Unrealized Losses	(52)	(26)
Total, Fair Value	4,427	4,257
Total, Gross Unrealized Losses	(81)	(51)
Temporarily impaired AFS debt securities | Commercial
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than Twelve Months, Fair Value	5,575	9,018
Less than Twelve Months, Gross Unrealized Losses	(50)	(293)
Twelve Months or Longer, Fair Value	4,586	0
Twelve Months or Longer, Gross Unrealized Losses	(158)	0
Total, Fair Value	10,161	9,018
Total, Gross Unrealized Losses	(208)	(293)
Temporarily impaired AFS debt securities | Non-agency residential
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than Twelve Months, Fair Value	335	212
Less than Twelve Months, Gross Unrealized Losses	(7)	(1)
Twelve Months or Longer, Fair Value	0	204
Twelve Months or Longer, Gross Unrealized Losses	0	(13)
Total, Fair Value	335	416
Total, Gross Unrealized Losses	(7)	(14)
Temporarily impaired AFS debt securities | U.S. Treasury and agency securities
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than Twelve Months, Fair Value	27,537	28,462
Less than Twelve Months, Gross Unrealized Losses	(251)	(752)
Twelve Months or Longer, Fair Value	24,035	0
Twelve Months or Longer, Gross Unrealized Losses	(767)	0
Total, Fair Value	51,572	28,462
Total, Gross Unrealized Losses	(1,018)	(752)
Temporarily impaired AFS debt securities | Non-U.S. securities
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than Twelve Months, Fair Value	772	52
Less than Twelve Months, Gross Unrealized Losses	(1)	(1)
Twelve Months or Longer, Fair Value	0	142
Twelve Months or Longer, Gross Unrealized Losses	0	(2)
Total, Fair Value	772	194
Total, Gross Unrealized Losses	(1)	(3)
Temporarily impaired AFS debt securities | Other taxable securities, substantially all asset-backed securities
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than Twelve Months, Fair Value	0	762
Less than Twelve Months, Gross Unrealized Losses	0	(5)
Twelve Months or Longer, Fair Value	92	1,438
Twelve Months or Longer, Gross Unrealized Losses	(2)	(18)
Total, Fair Value	92	2,200
Total, Gross Unrealized Losses	(2)	(23)
Temporarily impaired AFS debt securities | Total taxable securities
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than Twelve Months, Fair Value	110,497	176,945
Less than Twelve Months, Gross Unrealized Losses	(690)	(2,923)
Twelve Months or Longer, Fair Value	103,009	6,582
Twelve Months or Longer, Gross Unrealized Losses	(2,323)	(176)
Total, Fair Value	213,506	183,527
Total, Gross Unrealized Losses	(3,013)	(3,099)
Temporarily impaired AFS debt securities | Tax-exempt securities
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than Twelve Months, Fair Value	1,090	4,782
Less than Twelve Months, Gross Unrealized Losses	(2)	(148)
Twelve Months or Longer, Fair Value	7,100	1,873
Twelve Months or Longer, Gross Unrealized Losses	(102)	(36)
Total, Fair Value	8,190	6,655
Total, Gross Unrealized Losses	(104)	(184)
Other-than-temporarily impaired AFS debt securities | Non-agency residential
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than Twelve Months, Fair Value	58	94
Less than Twelve Months, Gross Unrealized Losses	(1)	(1)
Twelve Months or Longer, Fair Value	0	401
Twelve Months or Longer, Gross Unrealized Losses	0	(16)
Total, Fair Value	58	495
Total, Gross Unrealized Losses	$ (1)	$ (17)

Securities - Significant Assump

Securities - Significant Assumptions (Details) - Non-agency residential	Dec. 31, 2017
Weighted Average
Significant Assumptions:
Prepayment speed	12.40%
Loss severity	20.20%
Life default rate	20.90%
Weighted Average | Prime
Significant Assumptions:
Loss severity	17.50%
Life default rate	16.90%
Weighted Average | Alt-A
Significant Assumptions:
Loss severity	18.10%
Life default rate	21.40%
Weighted Average | Subprime
Significant Assumptions:
Loss severity	29.00%
Life default rate	21.60%
10th Percentile
Significant Assumptions:
Prepayment speed	3.00%
Loss severity	9.10%
Life default rate	1.20%
90th Percentile
Significant Assumptions:
Prepayment speed	21.30%
Loss severity	36.70%
Life default rate	76.60%

Securities - Maturities of Debt

Securities - Maturities of Debt Securities Carried at Fair Value and Held-to-maturity Debt Securities (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Held-to-maturity Securities, Debt Maturities, Net Carrying Amount [Abstract]
Due in One Year or Less, Amount	$ 1
Due in One Year or Less, Yield	5.82%
Due after One Year through Five Years, Amount	$ 71
Due after One Year through Five Years, Yield	3.06%
Due after Five Years through Ten Years, Amount	$ 1,144
Due after Five Years though Ten Years, Yield	2.65%
Due after Ten Years, Amount	$ 123,797
Due after Ten Years, Yield	3.03%
Amortized Cost	$ 125,013	$ 117,071
Total, Yield	3.03%
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Debt securities carried at fair value	$ 315,117	313,660
Held-to-maturity Securities, Debt Maturities, Fair Value [Abstract]
Due in One Year or Less, Amount	1
Due after One Year through Five Years, Amount	71
Due after Five Years though Ten Years, Amount	1,117
Due after Ten Years, Amount	122,110
Held-to-maturity Securities, Fair Value	123,299	$ 115,285
Mortgage-backed securities
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]
Due in One Year or Less, Amount	$ 59
Due in One Year or Less, Yield	7.18%
Due after One Year through Five Years, Amount	$ 1,002
Due after One Year through Five Years, Yield	2.03%
Due after Five Years though Ten Years, Amount	$ 12,478
Due after Five Years though Ten Years, Yield	2.43%
Due after Ten Years, Amount	$ 206,273
Due after Ten Years, Yield	3.36%
Total, Amount	$ 219,812
Total, Yield	3.31%
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Due in One Year or Less, Amount	$ 59
Due after One Year through Five Years, Amount	997
Due after Five Years though Ten Years, Amount	12,323
Due after Ten Years, Amount	205,476
Debt securities carried at fair value	218,855
Agency
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]
Due in One Year or Less, Amount	$ 5
Due in One Year or Less, Yield	4.20%
Due after One Year through Five Years, Amount	$ 28
Due after One Year through Five Years, Yield	3.69%
Due after Five Years though Ten Years, Amount	$ 555
Due after Five Years though Ten Years, Yield	2.57%
Due after Ten Years, Amount	$ 193,531
Due after Ten Years, Yield	3.22%
Total, Amount	$ 194,119
Total, Yield	3.22%
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Due in One Year or Less, Amount	$ 5
Due after One Year through Five Years, Amount	28
Due after Five Years though Ten Years, Amount	555
Due after Ten Years, Amount	192,341
Debt securities carried at fair value	192,929
Agency-collateralized mortgage obligations
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]
Due in One Year or Less, Amount	$ 0
Due in One Year or Less, Yield	0.00%
Due after One Year through Five Years, Amount	$ 0
Due after One Year through Five Years, Yield	0.00%
Due after Five Years though Ten Years, Amount	$ 33
Due after Five Years though Ten Years, Yield	2.52%
Due after Ten Years, Amount	$ 6,817
Due after Ten Years, Yield	3.18%
Total, Amount	$ 6,850
Total, Yield	3.18%
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Due in One Year or Less, Amount	$ 0
Due after One Year through Five Years, Amount	0
Due after Five Years though Ten Years, Amount	32
Due after Ten Years, Amount	6,777
Debt securities carried at fair value	6,809
Commercial
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]
Due in One Year or Less, Amount	$ 54
Due in One Year or Less, Yield	7.45%
Due after One Year through Five Years, Amount	$ 974
Due after One Year through Five Years, Yield	1.98%
Due after Five Years though Ten Years, Amount	$ 11,866
Due after Five Years though Ten Years, Yield	2.43%
Due after Ten Years, Amount	$ 970
Due after Ten Years, Yield	2.78%
Total, Amount	$ 13,864
Total, Yield	2.44%
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Due in One Year or Less, Amount	$ 54
Due after One Year through Five Years, Amount	969
Due after Five Years though Ten Years, Amount	11,703
Due after Ten Years, Amount	958
Debt securities carried at fair value	13,684
Non-agency residential
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]
Due in One Year or Less, Amount	$ 0
Due in One Year or Less, Yield	0.00%
Due after One Year through Five Years, Amount	$ 0
Due after One Year through Five Years, Yield	0.00%
Due after Five Years though Ten Years, Amount	$ 24
Due after Five Years though Ten Years, Yield	0.01%
Due after Ten Years, Amount	$ 4,955
Due after Ten Years, Yield	9.32%
Total, Amount	$ 4,979
Total, Yield	9.28%
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Due in One Year or Less, Amount	$ 0
Due after One Year through Five Years, Amount	0
Due after Five Years though Ten Years, Amount	33
Due after Ten Years, Amount	5,400
Debt securities carried at fair value	5,433
U.S. Treasury and agency securities
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]
Due in One Year or Less, Amount	$ 490
Due in One Year or Less, Yield	0.39%
Due after One Year through Five Years, Amount	$ 23,395
Due after One Year through Five Years, Yield	1.42%
Due after Five Years though Ten Years, Amount	$ 30,615
Due after Five Years though Ten Years, Yield	2.03%
Due after Ten Years, Amount	$ 23
Due after Ten Years, Yield	2.52%
Total, Amount	$ 54,523
Total, Yield	1.75%
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Due in One Year or Less, Amount	$ 491
Due after One Year through Five Years, Amount	22,898
Due after Five Years though Ten Years, Amount	30,111
Due after Ten Years, Amount	23
Debt securities carried at fair value	53,523
Non-U.S. securities
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]
Due in One Year or Less, Amount	$ 13,832
Due in One Year or Less, Yield	1.02%
Due after One Year through Five Years, Amount	$ 2,111
Due after One Year through Five Years, Yield	0.97%
Due after Five Years though Ten Years, Amount	$ 48
Due after Five Years though Ten Years, Yield	0.72%
Due after Ten Years, Amount	$ 167
Due after Ten Years, Yield	6.60%
Total, Amount	$ 16,158
Total, Yield	1.07%
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Due in One Year or Less, Amount	$ 13,830
Due after One Year through Five Years, Amount	2,115
Due after Five Years though Ten Years, Amount	48
Due after Ten Years, Amount	172
Debt securities carried at fair value	16,165
Other taxable securities, substantially all asset-backed securities
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]
Due in One Year or Less, Amount	$ 1,979
Due in One Year or Less, Yield	2.53%
Due after One Year through Five Years, Amount	$ 2,029
Due after One Year through Five Years, Yield	3.02%
Due after Five Years though Ten Years, Amount	$ 1,151
Due after Five Years though Ten Years, Yield	3.22%
Due after Ten Years, Amount	$ 751
Due after Ten Years, Yield	4.74%
Total, Amount	$ 5,910
Total, Yield	3.11%
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Due in One Year or Less, Amount	$ 1,981
Due after One Year through Five Years, Amount	2,006
Due after Five Years though Ten Years, Amount	1,184
Due after Ten Years, Amount	828
Debt securities carried at fair value	5,999
Total taxable securities
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]
Due in One Year or Less, Amount	$ 16,360
Due in One Year or Less, Yield	1.21%
Due after One Year through Five Years, Amount	$ 28,537
Due after One Year through Five Years, Yield	1.52%
Due after Five Years though Ten Years, Amount	$ 44,292
Due after Five Years though Ten Years, Yield	2.17%
Due after Ten Years, Amount	$ 207,214
Due after Ten Years, Yield	3.37%
Total, Amount	$ 296,403
Total, Yield	2.89%
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Due in One Year or Less, Amount	$ 16,361
Due after One Year through Five Years, Amount	28,016
Due after Five Years though Ten Years, Amount	43,666
Due after Ten Years, Amount	206,499
Debt securities carried at fair value	294,542
Tax-exempt securities
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]
Due in One Year or Less, Amount	$ 1,327
Due in One Year or Less, Yield	1.81%
Due after One Year through Five Years, Amount	$ 6,927
Due after One Year through Five Years, Yield	1.88%
Due after Five Years though Ten Years, Amount	$ 9,132
Due after Five Years though Ten Years, Yield	1.79%
Due after Ten Years, Amount	$ 3,155
Due after Ten Years, Yield	1.84%
Total, Amount	$ 20,541
Total, Yield	1.83%
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Due in One Year or Less, Amount	$ 1,326
Due after One Year through Five Years, Amount	6,934
Due after Five Years though Ten Years, Amount	9,162
Due after Ten Years, Amount	3,153
Debt securities carried at fair value	20,575
Debt securities
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]
Due in One Year or Less, Amount	$ 17,687
Due in One Year or Less, Yield	1.25%
Due after One Year through Five Years, Amount	$ 35,464
Due after One Year through Five Years, Yield	1.59%
Due after Five Years though Ten Years, Amount	$ 53,424
Due after Five Years though Ten Years, Yield	2.11%
Due after Ten Years, Amount	$ 210,369
Due after Ten Years, Yield	3.35%
Total, Amount	$ 316,944
Total, Yield	2.82%
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Due in One Year or Less, Amount	$ 17,687
Due after One Year through Five Years, Amount	34,950
Due after Five Years though Ten Years, Amount	52,828
Due after Ten Years, Amount	209,652
Debt securities carried at fair value	$ 315,117

Outstanding Loans and Leases -

Outstanding Loans and Leases - Narrative (Details) $ in Millions	Dec. 31, 2016USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loans and leases including disposal group	$ 915,897
Allowance included in assets of business held for sale	243
Credit card and other consumer
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Allowance included in assets of business held for sale	243
Credit Card Receivable | Non United States | Credit card and other consumer
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loans and leases including disposal group	9,214
Credit Card Receivable | Carrying Value | Non United States | Credit card and other consumer
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loans and leases including disposal group	$ 9,214

Outstanding Loans and Leases 87

Outstanding Loans and Leases - Past Due (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	$ 936,749	$ 906,683
Loans and leases including disposal group		915,897
Less: Loans of business held for sale		$ (9,214)
Percentage of outstandings, total outstanding	100.00%	100.00%
Loans and leases, measured at fair value	$ 5,710	$ 7,085
Loans pledged to secure borrowings	160,300	143,100
Residential Mortgage | Federal National Mortgage Association Certificates and Obligations (FNMA) and Federal Home Loan Mortgage Corporation Certificates and Obligations (FHLMC)
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans covered by protection agreements	6,300	6,400
Nonperforming Financing Receivable | Direct/Indirect Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonperforming loans	43	27
Estimate of Fair Value Measurement
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	$ 5,710	$ 7,085
Percentage of outstandings, total outstanding	0.61%	0.77%
Purchased Credit-impaired
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	$ 10,717
Loans and leases including disposal group		$ 13,738
Percentage of outstandings, total outstanding	1.14%	1.50%
Consumer Portfolio Segment
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	$ 455,276
Loans and leases including disposal group		$ 457,371
Consumer Portfolio Segment | Residential Mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases, measured at fair value	567	710
Consumer Portfolio Segment | Home equity lines of credit
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases, measured at fair value	361	341
Consumer Portfolio Segment | Carrying Value
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	454,348	456,320
Consumer Portfolio Segment | Estimate of Fair Value Measurement
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	928	1,051
Loans and leases including disposal group		1,051
Consumer Portfolio Segment | Purchased Credit-impaired
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	10,717	13,738
Loans and leases including disposal group		13,738
Consumer real estate | Core Portfolio, Residential Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	176,618	156,497
Consumer real estate | Core Portfolio, Home Equity Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	44,245	49,373
Consumer real estate | Non-core Portfolio, Residential Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	19,192	25,173
Consumer real estate | Non-core Portfolio, Residential Financing Receivable | Pay option
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	1,400	1,800
Consumer real estate | Non-core Portfolio, Home Equity Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	10,783	13,459
Consumer real estate | Fully Insured Loans | Core Portfolio, Residential Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	18,545	21,254
Consumer real estate | Fully Insured Loans | Core Portfolio, Home Equity Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	0	0
Consumer real estate | Fully Insured Loans | Non-core Portfolio, Residential Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	5,196	7,475
Consumer real estate | Fully Insured Loans | Non-core Portfolio, Home Equity Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	0	0
Consumer real estate | Nonperforming Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonperforming loans	2,300	2,500
Consumer real estate | Carrying Value | Core Portfolio, Residential Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	176,618	156,497
Consumer real estate | Carrying Value | Core Portfolio, Home Equity Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	44,245	49,373
Consumer real estate | Carrying Value | Non-core Portfolio, Residential Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	27,193	35,300
Consumer real estate | Carrying Value | Non-core Portfolio, Home Equity Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	13,499	17,070
Consumer real estate | Estimate of Fair Value Measurement
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	928	1,100
Consumer real estate | Purchased Credit-impaired | Non-core Portfolio, Residential Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	8,001	10,127
Consumer real estate | Purchased Credit-impaired | Non-core Portfolio, Home Equity Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	2,716	3,611
Credit card and other consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Less: Loans of business held for sale		(9,214)
Credit card and other consumer | Credit Card Receivable | United States
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	96,285	92,278
Credit card and other consumer | Credit Card Receivable | Non United States
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases including disposal group		9,214
Credit card and other consumer | Direct/Indirect Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	93,830	94,089
Credit card and other consumer | Direct/Indirect Consumer | Dealer Financial Services Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	49,900	48,900
Credit card and other consumer | Direct/Indirect Consumer | Unsecured Consumed Lending Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	469	585
Credit card and other consumer | Direct/Indirect Consumer | Securities Based Lending Loans | United States
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	39,800	40,100
Credit card and other consumer | Direct/Indirect Consumer | Securities Based Lending Loans | Non United States
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	3,000	3,000
Credit card and other consumer | Direct/Indirect Consumer | Student Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases		497
Credit card and other consumer | Direct/Indirect Consumer | Other Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	684	1,100
Credit card and other consumer | Other consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	2,678	2,499
Credit card and other consumer | Other consumer | Consumer Finance Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases		465
Credit card and other consumer | Other consumer | Consumer Leases
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	2,500	1,900
Credit card and other consumer | Other consumer | Consumer Overdrafts
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	163	157
Credit card and other consumer | Carrying Value | Credit Card Receivable | United States
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	96,285	92,278
Credit card and other consumer | Carrying Value | Credit Card Receivable | Non United States
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases including disposal group		9,214
Credit card and other consumer | Carrying Value | Direct/Indirect Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	93,830	94,089
Credit card and other consumer | Carrying Value | Other consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	2,678	2,499
Commercial Portfolio Segment
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	481,473	458,526
Commercial Portfolio Segment | United States
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	284,836	270,372
Loans and leases, measured at fair value	2,600	2,900
Commercial Portfolio Segment | Non United States
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	97,792	89,397
Loans and leases, measured at fair value	2,200	3,100
Commercial Portfolio Segment | Commercial Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	58,298	57,355
Commercial Portfolio Segment | Commercial Real Estate | United States
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	54,800	54,300
Commercial Portfolio Segment | Commercial Real Estate | Non United States
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	3,500	3,100
Commercial Portfolio Segment | Commercial Lease Financing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	22,116	22,375
Commercial Portfolio Segment | Small Business Commercial | United States
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	13,649	12,993
Commercial Portfolio Segment | Carrying Value
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	476,691	452,492
Commercial Portfolio Segment | Carrying Value | United States
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	284,836	270,372
Commercial Portfolio Segment | Carrying Value | Non United States
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	97,792	89,397
Commercial Portfolio Segment | Carrying Value | Commercial Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	58,298	57,355
Commercial Portfolio Segment | Carrying Value | Commercial Lease Financing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	22,116	22,375
Commercial Portfolio Segment | Carrying Value | Small Business Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	13,649	12,993
Commercial Portfolio Segment | Estimate of Fair Value Measurement
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	4,782	6,034
30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	$ 4,433
Loans and leases including disposal group		$ 5,567
Percentage of outstandings	0.48%	0.61%
30 to 59 Days Past Due | Consumer Portfolio Segment
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	$ 3,581	$ 3,984
Loans and leases including disposal group		3,984
30 to 59 Days Past Due | Consumer real estate | Core Portfolio, Residential Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	1,242	1,340
30 to 59 Days Past Due | Consumer real estate | Core Portfolio, Home Equity Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	215	239
30 to 59 Days Past Due | Consumer real estate | Non-core Portfolio, Residential Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	1,028	1,338
30 to 59 Days Past Due | Consumer real estate | Non-core Portfolio, Home Equity Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	224	260
30 to 59 Days Past Due | Consumer real estate | Fully Insured Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-performing troubled debt with no change in repayment terms at time of discharge, 90 days or more past due	850	1,100
30 to 59 Days Past Due | Consumer real estate | Nonperforming Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-performing troubled debt with no change in repayment terms at time of discharge, 90 days or more past due	253	266
30 to 59 Days Past Due | Credit card and other consumer | Credit Card Receivable | United States
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	542	472
30 to 59 Days Past Due | Credit card and other consumer | Credit Card Receivable | Non United States
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases including disposal group		37
30 to 59 Days Past Due | Credit card and other consumer | Direct/Indirect Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	320	272
30 to 59 Days Past Due | Credit card and other consumer | Other consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	10	26
30 to 59 Days Past Due | Commercial Portfolio Segment
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	852	1,583
30 to 59 Days Past Due | Commercial Portfolio Segment | United States
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	547	952
30 to 59 Days Past Due | Commercial Portfolio Segment | Non United States
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	52	348
30 to 59 Days Past Due | Commercial Portfolio Segment | Commercial Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	48	20
30 to 59 Days Past Due | Commercial Portfolio Segment | Commercial Lease Financing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	110	167
30 to 59 Days Past Due | Commercial Portfolio Segment | Small Business Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	95	96
60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	$ 1,895
Loans and leases including disposal group		$ 2,142
Percentage of outstandings	0.20%	0.23%
60 to 89 Days Past Due | Consumer Portfolio Segment
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	$ 1,527	$ 1,795
Loans and leases including disposal group		1,795
60 to 89 Days Past Due | Consumer real estate | Core Portfolio, Residential Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	321	425
60 to 89 Days Past Due | Consumer real estate | Core Portfolio, Home Equity Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	108	105
60 to 89 Days Past Due | Consumer real estate | Non-core Portfolio, Residential Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	468	674
60 to 89 Days Past Due | Consumer real estate | Non-core Portfolio, Home Equity Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	121	136
60 to 89 Days Past Due | Consumer real estate | Fully Insured Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-performing troubled debt with no change in repayment terms at time of discharge, 90 days or more past due	386	547
60 to 89 Days Past Due | Consumer real estate | Nonperforming Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-performing troubled debt with no change in repayment terms at time of discharge, 90 days or more past due	195	216
60 to 89 Days Past Due | Credit card and other consumer | Credit Card Receivable | United States
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	405	341
60 to 89 Days Past Due | Credit card and other consumer | Credit Card Receivable | Non United States
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases including disposal group		27
60 to 89 Days Past Due | Credit card and other consumer | Direct/Indirect Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	102	79
60 to 89 Days Past Due | Credit card and other consumer | Other consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	2	8
60 to 89 Days Past Due | Commercial Portfolio Segment
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	368	347
60 to 89 Days Past Due | Commercial Portfolio Segment | United States
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	244	263
60 to 89 Days Past Due | Commercial Portfolio Segment | Non United States
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	1	4
60 to 89 Days Past Due | Commercial Portfolio Segment | Commercial Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	10	10
60 to 89 Days Past Due | Commercial Portfolio Segment | Commercial Lease Financing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	68	21
60 to 89 Days Past Due | Commercial Portfolio Segment | Small Business Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	45	49
90 Days or More Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	$ 7,135
Loans and leases including disposal group		$ 9,299
Percentage of outstandings	0.76%	1.02%
90 Days or More Past Due | Consumer Portfolio Segment
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	$ 6,564	$ 8,727
Loans and leases including disposal group		8,727
90 Days or More Past Due | Consumer real estate | Core Portfolio, Residential Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	1,040	1,213
90 Days or More Past Due | Consumer real estate | Core Portfolio, Home Equity Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	473	451
90 Days or More Past Due | Consumer real estate | Non-core Portfolio, Residential Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	3,535	5,343
90 Days or More Past Due | Consumer real estate | Non-core Portfolio, Home Equity Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	572	832
90 Days or More Past Due | Consumer real estate | Fully Insured Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-performing troubled debt with no change in repayment terms at time of discharge, 90 days or more past due	3,200	4,800
90 Days or More Past Due | Credit card and other consumer | Credit Card Receivable | United States
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	900	782
90 Days or More Past Due | Credit card and other consumer | Credit Card Receivable | Non United States
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases including disposal group		66
90 Days or More Past Due | Credit card and other consumer | Direct/Indirect Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	43	34
90 Days or More Past Due | Credit card and other consumer | Other consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	1	6
90 Days or More Past Due | Commercial Portfolio Segment
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	571	572
90 Days or More Past Due | Commercial Portfolio Segment | United States
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	425	400
90 Days or More Past Due | Commercial Portfolio Segment | Non United States
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	3	5
90 Days or More Past Due | Commercial Portfolio Segment | Commercial Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	29	56
90 Days or More Past Due | Commercial Portfolio Segment | Commercial Lease Financing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	26	27
90 Days or More Past Due | Commercial Portfolio Segment | Small Business Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	88	84
Total Past Due 30 Days or More
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	$ 13,463
Loans and leases including disposal group		$ 17,008
Percentage of outstandings	1.44%	1.86%
Total Past Due 30 Days or More | Consumer Portfolio Segment
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	$ 11,672	$ 14,506
Loans and leases including disposal group		14,506
Total Past Due 30 Days or More | Consumer real estate | Core Portfolio, Residential Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	2,603	2,978
Total Past Due 30 Days or More | Consumer real estate | Core Portfolio, Home Equity Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	796	795
Total Past Due 30 Days or More | Consumer real estate | Non-core Portfolio, Residential Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	5,031	7,355
Total Past Due 30 Days or More | Consumer real estate | Non-core Portfolio, Home Equity Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	917	1,228
Total Past Due 30 Days or More | Credit card and other consumer | Credit Card Receivable | United States
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	1,847	1,595
Total Past Due 30 Days or More | Credit card and other consumer | Credit Card Receivable | Non United States
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases including disposal group		130
Total Past Due 30 Days or More | Credit card and other consumer | Direct/Indirect Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	465	385
Total Past Due 30 Days or More | Credit card and other consumer | Other consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	13	40
Total Past Due 30 Days or More | Commercial Portfolio Segment
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	1,791	2,502
Total Past Due 30 Days or More | Commercial Portfolio Segment | United States
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	1,216	1,615
Total Past Due 30 Days or More | Commercial Portfolio Segment | Non United States
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	56	357
Total Past Due 30 Days or More | Commercial Portfolio Segment | Commercial Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	87	86
Total Past Due 30 Days or More | Commercial Portfolio Segment | Commercial Lease Financing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	204	215
Total Past Due 30 Days or More | Commercial Portfolio Segment | Small Business Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	228	229
Total Current or Less Than 30 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	$ 906,859
Loans and leases including disposal group		$ 878,066
Percentage of outstandings, total outstanding	96.81%	95.87%
Total Current or Less Than 30 Days Past Due | Consumer Portfolio Segment
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	$ 431,959	$ 428,076
Loans and leases including disposal group		428,076
Total Current or Less Than 30 Days Past Due | Consumer real estate | Core Portfolio, Residential Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	174,015	153,519
Total Current or Less Than 30 Days Past Due | Consumer real estate | Core Portfolio, Home Equity Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	43,449	48,578
Total Current or Less Than 30 Days Past Due | Consumer real estate | Non-core Portfolio, Residential Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	14,161	17,818
Total Current or Less Than 30 Days Past Due | Consumer real estate | Non-core Portfolio, Home Equity Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	9,866	12,231
Total Current or Less Than 30 Days Past Due | Credit card and other consumer | Credit Card Receivable | United States
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	94,438	90,683
Total Current or Less Than 30 Days Past Due | Credit card and other consumer | Credit Card Receivable | Non United States
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases including disposal group		9,084
Total Current or Less Than 30 Days Past Due | Credit card and other consumer | Direct/Indirect Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	93,365	93,704
Total Current or Less Than 30 Days Past Due | Credit card and other consumer | Other consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	2,665	2,459
Total Current or Less Than 30 Days Past Due | Commercial Portfolio Segment
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	474,900	449,990
Total Current or Less Than 30 Days Past Due | Commercial Portfolio Segment | United States
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	283,620	268,757
Total Current or Less Than 30 Days Past Due | Commercial Portfolio Segment | Non United States
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	97,736	89,040
Total Current or Less Than 30 Days Past Due | Commercial Portfolio Segment | Commercial Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	58,211	57,269
Total Current or Less Than 30 Days Past Due | Commercial Portfolio Segment | Commercial Lease Financing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	21,912	22,160
Total Current or Less Than 30 Days Past Due | Commercial Portfolio Segment | Small Business Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	$ 13,421	$ 12,764

Outstanding Loans and Leases 88

Outstanding Loans and Leases - Nonperforming (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Financing Receivable, Recorded Investment, Past Due [Line Items]
Threshold period past due for nonperforming status of financing receivables	90 days	90 days
Loans and leases	$ 936,749	$ 906,683
Proceeds from sales	11,761	18,230	$ 22,316
Purchased credit impaired loans sold	803	549
Recoveries of loans and leases previously charged off	1,640	1,627	1,767
Loans and leases charged off	5,619	5,448	6,105
Nonperforming loans and leases	6,470	7,707
Accruing past due 90 days or more, including loans and leases held for sale	4,415	5,887
Residential Mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing past due 90 days or more	1,000	1,800
Residential Mortgage | Federal Housing Administration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonperforming loans and leases	2,200	3,000
90 Days or More Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	7,135
Consumer Portfolio Segment
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	455,276
Nonperforming loans and leases	5,166	6,004
Accruing past due 90 days or more, including loans and leases held for sale	4,170	5,679
Consumer Portfolio Segment | 90 Days or More Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	6,564	8,727
Consumer real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recoveries of loans and leases previously charged off	657	619	732
Loans and leases charged off	$ 770	1,155	1,841
Consumer real estate | Junior Lien Home Equity Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Threshold period past due for nonperforming status of financing receivables	90 days
Consumer real estate | Core Portfolio, Residential Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	$ 176,618	156,497
Nonperforming loans and leases	1,087	1,274
Accruing past due 90 days or more	417	486
Consumer real estate | Core Portfolio, Home Equity Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	44,245	49,373
Nonperforming loans and leases	1,079	969
Accruing past due 90 days or more	0	0
Consumer real estate | Non-core Portfolio, Residential Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	19,192	25,173
Nonperforming loans and leases	1,389	1,782
Accruing past due 90 days or more	2,813	4,307
Consumer real estate | Non-core Portfolio, Home Equity Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	10,783	13,459
Nonperforming loans and leases	1,565	1,949
Accruing past due 90 days or more	$ 0	0
Consumer real estate | Residential Mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Threshold period past due for nonperforming status of financing receivables	90 days
Consumer real estate | 90 Days or More Past Due | Core Portfolio, Residential Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	$ 1,040	1,213
Consumer real estate | 90 Days or More Past Due | Core Portfolio, Home Equity Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	473	451
Consumer real estate | 90 Days or More Past Due | Non-core Portfolio, Residential Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	3,535	5,343
Consumer real estate | 90 Days or More Past Due | Non-core Portfolio, Home Equity Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	572	832
Consumer real estate | Chapter Seven Bankruptcy
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	1,200
Credit card and other consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recoveries of loans and leases previously charged off	809	770	813
Loans and leases charged off	3,774	3,553	3,620
Credit card and other consumer | Credit Card Receivable | United States
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	96,285	92,278
Accruing past due 90 days or more	900	782
Credit card and other consumer | Credit Card Receivable | Non United States
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing past due 90 days or more, including loans and leases held for sale	0	66
Credit card and other consumer | Direct/Indirect Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	93,830	94,089
Nonperforming loans and leases	46	28
Accruing past due 90 days or more	40	34
Credit card and other consumer | Other consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	2,678	2,499
Nonperforming loans and leases	0	2
Accruing past due 90 days or more	0	4
Credit card and other consumer | 90 Days or More Past Due | Credit Card Receivable | United States
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	900	782
Credit card and other consumer | 90 Days or More Past Due | Direct/Indirect Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	43	34
Credit card and other consumer | 90 Days or More Past Due | Other consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	$ 1	6
Commercial Portfolio Segment
Financing Receivable, Recorded Investment, Past Due [Line Items]
Threshold period past due for nonperforming status of financing receivables	90 days
Loans and leases	$ 481,473	458,526
Recoveries of loans and leases previously charged off	174	238	222
Loans and leases charged off	1,075	740	$ 644
Nonperforming loans and leases	1,304	1,703
Accruing past due 90 days or more	245	208
Commercial Portfolio Segment | United States
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	284,836	270,372
Nonperforming loans and leases	814	1,256
Accruing past due 90 days or more	144	106
Commercial Portfolio Segment | Non United States
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	97,792	89,397
Nonperforming loans and leases	299	279
Accruing past due 90 days or more	3	5
Commercial Portfolio Segment | Commercial Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	58,298	57,355
Nonperforming loans and leases	112	72
Accruing past due 90 days or more	4	7
Commercial Portfolio Segment | Commercial Real Estate | United States
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	54,800	54,300
Commercial Portfolio Segment | Commercial Real Estate | Non United States
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	3,500	3,100
Commercial Portfolio Segment | Commercial Lease Financing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	22,116	22,375
Nonperforming loans and leases	24	36
Accruing past due 90 days or more	19	19
Commercial Portfolio Segment | Small Business Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonperforming loans and leases	55	60
Accruing past due 90 days or more	75	71
Commercial Portfolio Segment | Small Business Commercial | United States
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	13,649	12,993
Commercial Portfolio Segment | 90 Days or More Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	571	572
Commercial Portfolio Segment | 90 Days or More Past Due | United States
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	425	400
Commercial Portfolio Segment | 90 Days or More Past Due | Non United States
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	3	5
Commercial Portfolio Segment | 90 Days or More Past Due | Commercial Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	29	56
Commercial Portfolio Segment | 90 Days or More Past Due | Commercial Lease Financing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	26	27
Commercial Portfolio Segment | 90 Days or More Past Due | Small Business Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	88	84
Nonperforming Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Transfer of nonperforming loans to held-for-sale	198	55
Nonperforming Financing Receivable | Junior Lien Home Equity Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	$ 330	428
Nonperforming Financing Receivable | Chapter Seven Bankruptcy
Financing Receivable, Recorded Investment, Past Due [Line Items]
Threshold period past due for nonperforming status of financing receivables	90 days
Non-performing troubled debt with no change in repayment terms at time of discharge, current with contractual payments	$ 209
Nonperforming loans discharged more than twelve months prior (greater than)	66.00%
Nonperforming loans discharged more than twenty four months prior (greater than)	57.00%
Nonperforming Financing Receivable | Chapter Seven Bankruptcy | 90 Days or More Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-performing troubled debt with no change in repayment terms at time of discharge, 90 days or more past due	$ 124
Nonperforming Financing Receivable | Consumer Portfolio Segment
Financing Receivable, Recorded Investment, Past Due [Line Items]
Proceeds from sales	1,300	2,200
Purchased credit impaired loans sold	803	549
Recoveries of loans and leases previously charged off	105
Loans and leases charged off		30
Gain (loss) on the sale of loans and leases receivable	57	$ 75
Nonperforming Financing Receivable | Consumer real estate | Chapter Seven Bankruptcy
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	$ 358

Outstanding Loans and Leases 89

Outstanding Loans and Leases - Consumer Real Estate - Credit Quality Indicators (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	$ 936,749	$ 906,683
Estimate of Fair Value Measurement
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	5,710	7,085
Consumer real estate | Estimate of Fair Value Measurement
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	928	1,100
Consumer real estate | Core Portfolio Residential Mortgage
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	176,618	156,497
Consumer real estate | Non-core Residential Mortgage
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	19,192	25,173
Consumer real estate | Non-core Residential Mortgage | Pay option
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	1,400	1,800
Consumer real estate | Residential Mortgage PCI
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	8,001	10,127
Consumer real estate | Residential Mortgage PCI | Pay option
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	1,200	1,600
Consumer real estate | Core Portfolio Home Equity
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	44,245	49,373
Consumer real estate | Non-core Home Equity
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	10,783	13,459
Consumer real estate | Home Equity PCI
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	2,716	3,611
Consumer real estate | Less than 620 | Core Portfolio Residential Mortgage
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	2,234	2,479
Consumer real estate | Less than 620 | Non-core Residential Mortgage
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	2,390	3,198
Consumer real estate | Less than 620 | Residential Mortgage PCI
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	1,941	2,741
Consumer real estate | Less than 620 | Core Portfolio Home Equity
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	1,169	1,254
Consumer real estate | Less than 620 | Non-core Home Equity
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	2,098	2,692
Consumer real estate | Less than 620 | Home Equity PCI
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	452	559
Consumer real estate | Greater than or equal to 620 and less than 680 | Core Portfolio Residential Mortgage
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	4,531	5,094
Consumer real estate | Greater than or equal to 620 and less than 680 | Non-core Residential Mortgage
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	2,086	2,807
Consumer real estate | Greater than or equal to 620 and less than 680 | Residential Mortgage PCI
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	1,657	2,241
Consumer real estate | Greater than or equal to 620 and less than 680 | Core Portfolio Home Equity
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	2,371	2,853
Consumer real estate | Greater than or equal to 620 and less than 680 | Non-core Home Equity
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	2,393	3,094
Consumer real estate | Greater than or equal to 620 and less than 680 | Home Equity PCI
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	466	636
Consumer real estate | Greater than or equal to 680 and less than 740 | Core Portfolio Residential Mortgage
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	22,934	22,629
Consumer real estate | Greater than or equal to 680 and less than 740 | Non-core Residential Mortgage
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	3,519	4,512
Consumer real estate | Greater than or equal to 680 and less than 740 | Residential Mortgage PCI
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	2,396	2,916
Consumer real estate | Greater than or equal to 680 and less than 740 | Core Portfolio Home Equity
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	8,115	10,069
Consumer real estate | Greater than or equal to 680 and less than 740 | Non-core Home Equity
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	2,723	3,176
Consumer real estate | Greater than or equal to 680 and less than 740 | Home Equity PCI
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	786	1,069
Consumer real estate | Greater than or equal to 740 | Core Portfolio Residential Mortgage
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	128,374	105,041
Consumer real estate | Greater than or equal to 740 | Non-core Residential Mortgage
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	6,001	7,181
Consumer real estate | Greater than or equal to 740 | Residential Mortgage PCI
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	2,007	2,229
Consumer real estate | Greater than or equal to 740 | Core Portfolio Home Equity
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	32,590	35,197
Consumer real estate | Greater than or equal to 740 | Non-core Home Equity
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	3,569	4,497
Consumer real estate | Greater than or equal to 740 | Home Equity PCI
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	1,012	1,347
Consumer real estate | Less than or equal to 90 percent | Core Portfolio Residential Mortgage
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	153,669	129,737
Consumer real estate | Less than or equal to 90 percent | Non-core Residential Mortgage
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	12,135	14,280
Consumer real estate | Less than or equal to 90 percent | Residential Mortgage PCI
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	6,872	7,811
Consumer real estate | Less than or equal to 90 percent | Core Portfolio Home Equity
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	43,048	47,171
Consumer real estate | Less than or equal to 90 percent | Non-core Home Equity
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	7,944	8,480
Consumer real estate | Less than or equal to 90 percent | Home Equity PCI
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	1,781	1,942
Consumer real estate | Greater than 90 percent but less than or equal to 100 percent | Core Portfolio Residential Mortgage
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	3,082	3,634
Consumer real estate | Greater than 90 percent but less than or equal to 100 percent | Non-core Residential Mortgage
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	850	1,446
Consumer real estate | Greater than 90 percent but less than or equal to 100 percent | Residential Mortgage PCI
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	559	1,021
Consumer real estate | Greater than 90 percent but less than or equal to 100 percent | Core Portfolio Home Equity
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	549	1,006
Consumer real estate | Greater than 90 percent but less than or equal to 100 percent | Non-core Home Equity
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	1,053	1,668
Consumer real estate | Greater than 90 percent but less than or equal to 100 percent | Home Equity PCI
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	412	630
Consumer real estate | Greater than 100 percent | Core Portfolio Residential Mortgage
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	1,322	1,872
Consumer real estate | Greater than 100 percent | Non-core Residential Mortgage
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	1,011	1,972
Consumer real estate | Greater than 100 percent | Residential Mortgage PCI
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	570	1,295
Consumer real estate | Greater than 100 percent | Core Portfolio Home Equity
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	648	1,196
Consumer real estate | Greater than 100 percent | Non-core Home Equity
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	1,786	3,311
Consumer real estate | Greater than 100 percent | Home Equity PCI
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	523	1,039
Consumer real estate | Fully Insured Loans | Core Portfolio Residential Mortgage
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	18,545	21,254
Consumer real estate | Fully Insured Loans | Non-core Residential Mortgage
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	5,196	7,475
Consumer real estate | Fully Insured Loans | Residential Mortgage PCI
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	0	0
Consumer real estate | Fully Insured Loans | Core Portfolio Home Equity
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	0	0
Consumer real estate | Fully Insured Loans | Non-core Home Equity
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	0	0
Consumer real estate | Fully Insured Loans | Home Equity PCI
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	$ 0	$ 0

Outstanding Loans and Leases 90

Outstanding Loans and Leases - Credit Card and Other Consumer - Credit Quality Indicators (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	$ 936,749	$ 906,683
Loans and leases including disposal group		915,897
Credit card and other consumer | Credit Card Receivable | United States
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	96,285	92,278
Credit card and other consumer | Credit Card Receivable | United States | Less than 620
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	4,730	4,431
Credit card and other consumer | Credit Card Receivable | United States | Greater than or equal to 620 and less than 680
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	12,422	12,364
Credit card and other consumer | Credit Card Receivable | United States | Greater than or equal to 680 and less than 740
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	35,656	34,828
Credit card and other consumer | Credit Card Receivable | United States | Greater than or equal to 740
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	43,477	40,655
Credit card and other consumer | Credit Card Receivable | United States | Other internal credit metrics
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	0	0
Credit card and other consumer | Credit Card Receivable | Non United States
Financing Receivable, Recorded Investment [Line Items]
Loans and leases including disposal group		$ 9,214
Percentage outstanding, current or less than 30 days past due		98.00%
Percentage outstanding, current or less than 30 to 89 days past due		1.00%
Loans 90 days or more past due		1.00%
Credit card and other consumer | Credit Card Receivable | Non United States | Less than 620
Financing Receivable, Recorded Investment [Line Items]
Loans and leases including disposal group		$ 0
Credit card and other consumer | Credit Card Receivable | Non United States | Greater than or equal to 620 and less than 680
Financing Receivable, Recorded Investment [Line Items]
Loans and leases including disposal group		0
Credit card and other consumer | Credit Card Receivable | Non United States | Greater than or equal to 680 and less than 740
Financing Receivable, Recorded Investment [Line Items]
Loans and leases including disposal group		0
Credit card and other consumer | Credit Card Receivable | Non United States | Greater than or equal to 740
Financing Receivable, Recorded Investment [Line Items]
Loans and leases including disposal group		0
Credit card and other consumer | Credit Card Receivable | Non United States | Other internal credit metrics
Financing Receivable, Recorded Investment [Line Items]
Loans and leases including disposal group		9,214
Credit card and other consumer | Direct/Indirect Consumer
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	93,830	94,089
Securities based lending overcollateralized	42,800	43,100
Loans no longer originated by corporation		499
Credit card and other consumer | Direct/Indirect Consumer | Less than 620
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	1,630	1,478
Credit card and other consumer | Direct/Indirect Consumer | Greater than or equal to 620 and less than 680
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	2,000	2,070
Credit card and other consumer | Direct/Indirect Consumer | Greater than or equal to 680 and less than 740
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	11,906	12,491
Credit card and other consumer | Direct/Indirect Consumer | Greater than or equal to 740
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	34,838	33,420
Credit card and other consumer | Direct/Indirect Consumer | Other internal credit metrics
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	43,456	44,630
Credit card and other consumer | Other consumer
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	2,678	$ 2,499
Percentage from exited businesses		19.00%
Credit card and other consumer | Other consumer | Less than 620
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	49	$ 187
Credit card and other consumer | Other consumer | Greater than or equal to 620 and less than 680
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	143	222
Credit card and other consumer | Other consumer | Greater than or equal to 680 and less than 740
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	398	404
Credit card and other consumer | Other consumer | Greater than or equal to 740
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	1,921	1,525
Credit card and other consumer | Other consumer | Other internal credit metrics
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	$ 167	$ 161

Outstanding Loans and Leases 91

Outstanding Loans and Leases - Commercial - Credit Quality Indicators (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	$ 936,749	$ 906,683
Estimate of Fair Value Measurement
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	5,710	7,085
Commercial Portfolio Segment
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	481,473	458,526
Commercial Portfolio Segment | Estimate of Fair Value Measurement
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	4,782	6,034
Commercial Portfolio Segment | Commercial Real Estate
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	58,298	57,355
Commercial Portfolio Segment | Commercial Lease Financing
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	22,116	22,375
Commercial Portfolio Segment | Pass rated | Commercial Real Estate
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	57,732	56,957
Commercial Portfolio Segment | Pass rated | Commercial Lease Financing
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	21,535	21,565
Commercial Portfolio Segment | Reservable criticized | Commercial Real Estate
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	566	398
Commercial Portfolio Segment | Reservable criticized | Commercial Lease Financing
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	581	810
Commercial Portfolio Segment | United States
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	284,836	270,372
Commercial Portfolio Segment | United States | Commercial Real Estate
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	54,800	54,300
Commercial Portfolio Segment | United States | Small Business Commercial
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	13,649	12,993
Commercial Portfolio Segment | United States | Pass rated
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	275,904	261,214
Commercial Portfolio Segment | United States | Pass rated | Small Business Commercial
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	322	453
Commercial Portfolio Segment | United States | Reservable criticized
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	8,932	9,158
Commercial Portfolio Segment | United States | Reservable criticized | Small Business Commercial
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	50	71
Commercial Portfolio Segment | United States | Refreshed FICO or Internal Credit Metric | Small Business Commercial | Business Card and Small Business Loan
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	$ 709	$ 755
Commercial Portfolio Segment | United States | Internal Credit Metrics | Small Business Commercial
Financing Receivable, Recorded Investment [Line Items]
Percentage outstanding, current or less than 30 days past due	98.00%	98.00%
Commercial Portfolio Segment | United States | Less than 620 | Small Business Commercial
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	$ 223	$ 200
Commercial Portfolio Segment | United States | Greater than or equal to 620 and less than 680 | Small Business Commercial
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	625	591
Commercial Portfolio Segment | United States | Greater than or equal to 680 and less than 740 | Small Business Commercial
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	1,875	1,741
Commercial Portfolio Segment | United States | Greater than or equal to 740 | Small Business Commercial
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	3,713	3,264
Commercial Portfolio Segment | United States | Other internal credit metrics | Small Business Commercial
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	6,841	6,673
Commercial Portfolio Segment | Non United States
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	97,792	89,397
Commercial Portfolio Segment | Non United States | Commercial Real Estate
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	3,500	3,100
Commercial Portfolio Segment | Non United States | Pass rated
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	96,199	85,689
Commercial Portfolio Segment | Non United States | Reservable criticized
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	$ 1,593	$ 3,708

Outstanding Loans and Leases 92

Outstanding Loans and Leases - Consumer Real Estate - Impaired Loans (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Financing Receivable, Impaired [Line Items]
Loans and leases	$ 936,749	$ 906,683
Consumer real estate
Financing Receivable, Impaired [Line Items]
Real estate acquired through foreclosure	236	363
Loans with formal foreclosure proceeding in process	3,600
Reclassified consumer real estate loans	815	1,400
Consumer real estate | Residential Mortgage
Unpaid Principal Balance
With no recorded allowance	8,856	11,151
With an allowance recorded	2,908	4,041
Total	11,764	15,192
Carrying Value
With no recorded allowance	6,870	8,695
With an allowance recorded	2,828	3,936
Total	9,698	12,631
Related Allowance	174	219
Average Carrying Value
With no recorded allowance	7,737	10,178	$ 13,867
With an allowance recorded	3,414	5,067	7,290
Total	11,151	15,245	21,157
Interest Income Recognized
With no recorded allowance	311	360	403
With an allowance recorded	123	167	236
Total	434	527	639
Consumer real estate | Home equity lines of credit
Unpaid Principal Balance
With no recorded allowance	3,622	3,704
With an allowance recorded	972	910
Total	4,594	4,614
Carrying Value
With no recorded allowance	1,956	1,953
With an allowance recorded	900	824
Total	2,856	2,777
Related Allowance	174	137
Average Carrying Value
With no recorded allowance	1,997	1,906	1,777
With an allowance recorded	858	852	785
Total	2,855	2,758	2,562
Interest Income Recognized
With no recorded allowance	109	90	89
With an allowance recorded	24	24	24
Total	133	$ 114	$ 113
Consumer real estate | Chapter Seven Bankruptcy
Financing Receivable, Impaired [Line Items]
Loans and leases	1,200
Consumer real estate | Chapter Seven Bankruptcy | Nonperforming Financing Receivable
Financing Receivable, Impaired [Line Items]
Loans and leases	358
Consumer real estate | Chapter Seven Bankruptcy | Fully Insured Loans | Federal Housing Administration
Financing Receivable, Impaired [Line Items]
Loans and leases	$ 419

Outstanding Loans and Leases 93

Outstanding Loans and Leases - Consumer Real Estate - TDRs Entered into During the Period (Details) - Consumer real estate - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Financing Receivable, Modifications [Line Items]
Unpaid Principal Balance	$ 1,588,000,000	$ 1,979,000,000	$ 4,005,000,000
Carrying Value	$ 1,302,000,000	$ 1,666,000,000	$ 3,430,000,000
Pre-Modification Interest Rate	4.33%	4.40%	4.61%
Post-Modification Interest Rate	3.83%	3.54%	4.11%
Net Charge-offs	$ 48,000,000	$ 72,000,000	$ 181,000,000
Residential Mortgage
Financing Receivable, Modifications [Line Items]
Unpaid Principal Balance	824,000,000	1,130,000,000	2,986,000,000
Carrying Value	$ 712,000,000	$ 1,017,000,000	$ 2,655,000,000
Pre-Modification Interest Rate	4.43%	4.73%	4.98%
Post-Modification Interest Rate	4.16%	4.16%	4.43%
Net Charge-offs	$ 6,000,000	$ 11,000,000	$ 97,000,000
Principal forgiveness	0	13,000,000	396,000,000
Home equity lines of credit
Financing Receivable, Modifications [Line Items]
Unpaid Principal Balance	764,000,000	849,000,000	1,019,000,000
Carrying Value	$ 590,000,000	$ 649,000,000	$ 775,000,000
Pre-Modification Interest Rate	4.22%	3.95%	3.54%
Post-Modification Interest Rate	3.49%	2.72%	3.17%
Net Charge-offs	$ 42,000,000	$ 61,000,000	$ 84,000,000

Outstanding Loans and Leases 94

Outstanding Loans and Leases - Consumer Real Estate - Modification Programs (Details) - Consumer real estate - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Financing Receivable, Modifications [Line Items]
Total modifications	$ 1,302	$ 1,666	$ 3,430
Modifications under government programs
Financing Receivable, Modifications [Line Items]
Total modifications	85	187	488
Modifications under proprietary programs
Financing Receivable, Modifications [Line Items]
Total modifications	437	422	595
Trial modifications
Financing Receivable, Modifications [Line Items]
Total modifications	569	831	1,968
Loans discharged in Chapter 7 bankruptcy
Financing Receivable, Modifications [Line Items]
Total modifications	211	226	379
Contractual interest rate reduction | Modifications under government programs
Financing Receivable, Modifications [Line Items]
Total modifications	59	151	431
Contractual interest rate reduction | Modifications under proprietary programs
Financing Receivable, Modifications [Line Items]
Total modifications	281	235	219
Capitalization of past due amounts | Modifications under proprietary programs
Financing Receivable, Modifications [Line Items]
Total modifications	63	40	79
Principal and/or interest forbearance | Modifications under government programs
Financing Receivable, Modifications [Line Items]
Total modifications	4	13	11
Principal and/or interest forbearance | Modifications under proprietary programs
Financing Receivable, Modifications [Line Items]
Total modifications	38	72	168
Other modifications | Modifications under government programs
Financing Receivable, Modifications [Line Items]
Total modifications	22	23	46
Other modifications | Modifications under proprietary programs
Financing Receivable, Modifications [Line Items]
Total modifications	$ 55	$ 75	$ 129

Outstanding Loans and Leases 95

Outstanding Loans and Leases - Consumer Real Estate - TDRs Entering Payment Default That Were Modified During the Preceding 12 Months (Details) - Consumer real estate $ in Millions	12 Months Ended
	Dec. 31, 2017USD ($)payment	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)
Financing Receivable, Modifications [Line Items]
Number of missing payments causing default | payment	3
Trouble debt restructurings entered payment default that were modified during the preceding twelve months	$ 726	$ 1,440	$ 4,207
Modifications under government programs
Financing Receivable, Modifications [Line Items]
Trouble debt restructurings entered payment default that were modified during the preceding twelve months	81	262	457
Modifications under proprietary programs
Financing Receivable, Modifications [Line Items]
Trouble debt restructurings entered payment default that were modified during the preceding twelve months	138	196	287
Loans discharged in Chapter 7 bankruptcy
Financing Receivable, Modifications [Line Items]
Trouble debt restructurings entered payment default that were modified during the preceding twelve months	116	158	285
Trial modifications
Financing Receivable, Modifications [Line Items]
Trouble debt restructurings entered payment default that were modified during the preceding twelve months	$ 391	$ 824	$ 3,178

Outstanding Loans and Leases 96

Outstanding Loans and Leases - Credit Card and Other Consumer (Details) - Credit card and other consumer - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Financing Receivable, Impaired [Line Items]
Fixed payment plan period for loans modified	60 months
Direct/Indirect Consumer
Unpaid Principal Balance
With no recorded allowance	$ 58	$ 49
With an allowance recorded	1	3
Total	59	52
Carrying Value
With no recorded allowance	28	22
With an allowance recorded	1	3
Total	29	25
Related Allowance	0	0
Average Carrying Value
With no recorded allowance	21	20	$ 22
With an allowance recorded	2	10	51
Total	23	30	73
Interest Income Recognized
With no recorded allowance	2	0	0
With an allowance recorded	0	1	3
Total	2	1	3
United States | Credit Card Receivable
Unpaid Principal Balance
With an allowance recorded	454	479
Total	454	479
Carrying Value
With an allowance recorded	461	485
Total	461	485
Related Allowance	125	128
Average Carrying Value
With an allowance recorded	464	556	749
Total	464	556	749
Interest Income Recognized
With an allowance recorded	25	31	43
Total	25	31	43
Non United States | Credit Card Receivable
Unpaid Principal Balance
With an allowance recorded, including loans held for sale		88
Total, including loans held for sale		88
Carrying Value
With an allowance recorded, including loans held for sale		100
Total, including loans held for sale		100
Related allowance, including loans held for sale		61
Average Carrying Value
With an allowance recorded			145
With an allowance recorded, including loans held for sale	47	111
Total, including loans held for sale	47	111
Total			145
Interest Income Recognized
With an allowance recorded			4
With an allowance recorded, including loans held for sale	1	3
Total, including loans held for sale	$ 1	$ 3
Total			$ 4

Outstanding Loans and Leases 97

Outstanding Loans and Leases - Credit Card and Other Consumer - TDRs by Program Type (Details) - Credit card and other consumer - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Financing Receivable, Modifications [Line Items]
Renegotiated TDRs	$ 490	$ 610
Percent of balances current or less than 30 days past due	87.00%	80.79%
Internal Programs
Financing Receivable, Modifications [Line Items]
Renegotiated TDRs	$ 204	$ 233
External Programs
Financing Receivable, Modifications [Line Items]
Renegotiated TDRs	257	272
Other
Financing Receivable, Modifications [Line Items]
Renegotiated TDRs	29	105
Credit Card Receivable | United States
Financing Receivable, Modifications [Line Items]
Renegotiated TDRs	$ 461	$ 485
Percent of balances current or less than 30 days past due	86.92%	88.99%
Credit Card Receivable | Non United States
Financing Receivable, Modifications [Line Items]
Renegotiated TDRs		$ 100
Percent of balances current or less than 30 days past due		38.47%
Credit Card Receivable | Internal Programs | United States
Financing Receivable, Modifications [Line Items]
Renegotiated TDRs	$ 203	$ 220
Credit Card Receivable | Internal Programs | Non United States
Financing Receivable, Modifications [Line Items]
Renegotiated TDRs		11
Credit Card Receivable | External Programs | United States
Financing Receivable, Modifications [Line Items]
Renegotiated TDRs	257	264
Credit Card Receivable | External Programs | Non United States
Financing Receivable, Modifications [Line Items]
Renegotiated TDRs		7
Credit Card Receivable | Other | United States
Financing Receivable, Modifications [Line Items]
Renegotiated TDRs	1	1
Credit Card Receivable | Other | Non United States
Financing Receivable, Modifications [Line Items]
Renegotiated TDRs		82
Direct/Indirect Consumer
Financing Receivable, Modifications [Line Items]
Renegotiated TDRs	$ 29	$ 25
Percent of balances current or less than 30 days past due	88.16%	90.49%
Direct/Indirect Consumer | Internal Programs
Financing Receivable, Modifications [Line Items]
Renegotiated TDRs	$ 1	$ 2
Direct/Indirect Consumer | External Programs
Financing Receivable, Modifications [Line Items]
Renegotiated TDRs	0	1
Direct/Indirect Consumer | Other
Financing Receivable, Modifications [Line Items]
Renegotiated TDRs	$ 28	$ 22

Outstanding Loans and Leases 98

Outstanding Loans and Leases - Credit Card and Other Consumer - TDRs Entered into During the Period (Details) - Credit card and other consumer - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Financing Receivable, Modifications [Line Items]
Unpaid Principal Balance	$ 240	$ 250	$ 298
Carrying Value	$ 235	$ 260	$ 316
Pre- Modification Interest Rate	17.17%	18.73%	18.58%
Post- Modification Interest Rate	5.22%	3.93%	3.84%
Net charge-offs	$ 52	$ 74	$ 98
Direct/Indirect Consumer
Financing Receivable, Modifications [Line Items]
Unpaid Principal Balance	37	21	19
Carrying Value	$ 22	$ 13	$ 12
Pre- Modification Interest Rate	4.81%	3.44%	5.95%
Post- Modification Interest Rate	4.30%	3.29%	5.19%
United States | Credit Card Receivable
Financing Receivable, Modifications [Line Items]
Unpaid Principal Balance	$ 203	$ 163	$ 205
Carrying Value	$ 213	$ 172	$ 218
Pre- Modification Interest Rate	18.47%	17.54%	17.07%
Post- Modification Interest Rate	5.32%	5.47%	5.08%
Non United States | Credit Card Receivable
Financing Receivable, Modifications [Line Items]
Unpaid Principal Balance		$ 66	$ 74
Carrying Value		$ 75	$ 86
Pre- Modification Interest Rate		23.99%	24.05%
Post- Modification Interest Rate		0.52%	0.53%

Outstanding Loans and Leases 99

Outstanding Loans and Leases - Credit Card and Other Consumer - TDRs Entered into During the Period, Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2017USD ($)payment	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)
Financing Receivable, Modifications [Line Items]
Number of consecutive missed payments | payment	2
Credit card and other consumer
Financing Receivable, Modifications [Line Items]
Period for payment default after modification	12 months
Credit card and other consumer | Credit Card Receivable | United States
Financing Receivable, Modifications [Line Items]
Percent expected to be in payment default within 12 months after modification	13.00%
Trouble debt restructurings entered payment default that were modified during the preceding twelve months	$ 28	$ 30	$ 43
Credit card and other consumer | Credit Card Receivable | Non United States
Financing Receivable, Modifications [Line Items]
Trouble debt restructurings entered payment default that were modified during the preceding twelve months	$ 0	127	152
Credit card and other consumer | Direct/Indirect Consumer
Financing Receivable, Modifications [Line Items]
Percent expected to be in payment default within 12 months after modification	15.00%
Trouble debt restructurings entered payment default that were modified during the preceding twelve months	$ 4	$ 2	$ 3

Outstanding Loans and Leases100

Outstanding Loans and Leases - Commercial Loans - Impaired Loans (Details) - Commercial Portfolio Segment - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Financing Receivable, Impaired [Line Items]
Lending commitments	$ 205	$ 461
Real estate acquired through foreclosure	52	14
United States
Unpaid Principal Balance
With no recorded allowance	576	860
With an allowance recorded	1,393	2,018
Total	1,969	2,878
Carrying Value
With no recorded allowance	571	827
With an allowance recorded	1,109	1,569
Total	1,680	2,396
Related Allowance	98	132
Average Carrying Value
With no recorded allowance	772	787	$ 688
With an allowance recorded	1,260	1,569	953
Total	2,032	2,356	1,641
Interest Income Recognized
With no recorded allowance	12	14	14
With an allowance recorded	33	59	48
Total	45	73	62
Non United States
Unpaid Principal Balance
With no recorded allowance	14	130
With an allowance recorded	528	545
Total	542	675
Carrying Value
With no recorded allowance	11	130
With an allowance recorded	507	432
Total	518	562
Related Allowance	58	104
Average Carrying Value
With no recorded allowance	46	34	29
With an allowance recorded	463	409	125
Total	509	443	154
Interest Income Recognized
With no recorded allowance	0	1	1
With an allowance recorded	13	14	7
Total	13	15	8
Commercial Real Estate
Unpaid Principal Balance
With no recorded allowance	83	77
With an allowance recorded	133	243
Total	216	320
Carrying Value
With no recorded allowance	80	71
With an allowance recorded	41	96
Total	121	167
Related Allowance	4	10
Average Carrying Value
With no recorded allowance	69	67	75
With an allowance recorded	73	92	216
Total	142	159	291
Interest Income Recognized
With no recorded allowance	1	0	1
With an allowance recorded	2	4	7
Total	3	4	8
Commercial lease financing
Unpaid Principal Balance
With an allowance recorded	20	6
Total	20	6
Carrying Value
With an allowance recorded	18	4
Total	18	4
Related Allowance	3	0
Average Carrying Value
With an allowance recorded	8	2	0
Total	8	2	0
Interest Income Recognized
With an allowance recorded	0	0	0
Total	0	0	0
Small Business Commercial
Unpaid Principal Balance
With an allowance recorded	84	85
Total	84	85
Carrying Value
With an allowance recorded	70	73
Total	70	73
Related Allowance	27	27
Average Carrying Value
With an allowance recorded	73	87	109
Total	73	87	109
Interest Income Recognized
With an allowance recorded	0	1	1
Total	$ 0	$ 1	$ 1

Outstanding Loans and Leases101

Outstanding Loans and Leases - Commercial - TDRs Entered Into During the Period (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Financing Receivable, Modifications [Line Items]
Threshold period past due for nonperforming status of financing receivables	90 days	90 days
Commercial Portfolio Segment
Financing Receivable, Modifications [Line Items]
Unpaid Principal Balance	$ 1,206	$ 1,895	$ 1,238
Carrying Value	1,081	1,817	1,158
Net charge-offs	$ 138	137	31
Threshold period past due for nonperforming status of financing receivables	90 days
Commercial Portfolio Segment | Commercial Real Estate
Financing Receivable, Modifications [Line Items]
Unpaid Principal Balance	$ 35	77	42
Carrying Value	24	77	42
Trouble debt restructurings entered payment default that were modified during the preceding twelve months	19	34	25
Commercial Portfolio Segment | Commercial lease financing
Financing Receivable, Modifications [Line Items]
Unpaid Principal Balance	20	6
Carrying Value	17	4
Commercial Portfolio Segment | Small Business Commercial
Financing Receivable, Modifications [Line Items]
Unpaid Principal Balance	13	1	14
Carrying Value	13	1	11
Commercial Portfolio Segment | United States
Financing Receivable, Modifications [Line Items]
Unpaid Principal Balance	1,033	1,556	853
Carrying Value	922	1,482	779
Trouble debt restructurings entered payment default that were modified during the preceding twelve months	64	140	105
Commercial Portfolio Segment | Non United States
Financing Receivable, Modifications [Line Items]
Unpaid Principal Balance	105	255	329
Carrying Value	$ 105	$ 253	$ 326

Outstanding Loans and Leases102

Outstanding Loans and Leases - Rollforward of Accretable Yield (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Rollforward of Accretable Yield
Accretable yield, beginning of period	$ 3,805	$ 4,569
Accretion	(601)	(722)
Disposals/transfers	(634)	(486)
Reclassifications from nonaccretable difference	219	444
Accretable yield, end of period	2,789	3,805
Purchased credit impaired loans sold	$ 803	$ 549

Outstanding Loans and Leases103

Outstanding Loans and Leases - Loans Held-for-Sale (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Receivables [Abstract]
Loans held-for-sale	$ 11,430	$ 9,066
Proceeds including cash and securities from sales securitizations and paydowns of loans held for sale	41,300	32,600	$ 41,200
Originations and purchases	$ 43,506	$ 33,107	$ 37,933

Allowance for Credit Losses - A

Allowance for Credit Losses - Allowance by Portfolio Segment (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2016
Allowance for Loan and Lease Losses [Roll Forward]
Allowance for loan and lease losses, beginning of the period	$ 11,237	$ 12,234	$ 14,419
Loans and leases charged off	(5,619)	(5,448)	(6,105)
Recoveries of loans and leases previously charged off	1,640	1,627	1,767
Net charge-offs	(3,979)	(3,821)	(4,338)
Provision for loan and lease losses	3,381	3,581	3,043
Other	(39)	(174)	(82)
Allowance for loan and lease losses, December 31				$ 11,480
Less: Allowance included in assets of business held for sale (6)				(243)
Allowance for loan and lease losses, end of the period	10,393	11,237	12,234
Reserve for unfunded lending commitments, beginning of the period	11,999	12,880
Provision for unfunded lending commitments	3,396	3,597	3,161
Reserve for unfunded lending commitments, end of the period	11,170	11,999	12,880
Allowance for credit losses	11,999	12,880	12,880	11,999
Unfunded loan commitments
Allowance for Loan and Lease Losses [Roll Forward]
Other		100
Reserve for unfunded lending commitments, beginning of the period	762	646	528
Provision for unfunded lending commitments	15	16	118
Reserve for unfunded lending commitments, end of the period	777	762	646
Allowance for credit losses	762	646	528	762
Purchased Credit-impaired
Allowance for Loan and Lease Losses [Roll Forward]
Loans and leases charged off	(207)	(340)	(808)
Provision for loan and lease losses	76	(45)	(40)
Reserve for unfunded lending commitments, beginning of the period	419
Reserve for unfunded lending commitments, end of the period	289	419
Allowance for credit losses	419	419		419
Financing receivable allowance sold	87	60	234
Consumer Real Estate
Allowance for Loan and Lease Losses [Roll Forward]
Allowance for loan and lease losses, beginning of the period	2,750	3,914	5,935
Loans and leases charged off	(770)	(1,155)	(1,841)
Recoveries of loans and leases previously charged off	657	619	732
Net charge-offs	(113)	(536)	(1,109)
Provision for loan and lease losses	(710)	(258)	(70)
Other	0	(30)	(34)
Allowance for loan and lease losses, end of the period	1,720	2,750	3,914
Reserve for unfunded lending commitments, beginning of the period	2,750	3,914
Reserve for unfunded lending commitments, end of the period	1,720	2,750	3,914
Allowance for credit losses	2,750	3,914	3,914	2,750
Consumer Real Estate | Unfunded loan commitments
Allowance for Loan and Lease Losses [Roll Forward]
Other		0
Reserve for unfunded lending commitments, beginning of the period	0	0	0
Provision for unfunded lending commitments	0	0	0
Reserve for unfunded lending commitments, end of the period	0	0	0
Allowance for credit losses	0	0	0	0
Consumer Real Estate | Purchased Credit-impaired
Allowance for Loan and Lease Losses [Roll Forward]
Loans and leases charged off	(207)	(340)	(808)
Reserve for unfunded lending commitments, beginning of the period	419
Reserve for unfunded lending commitments, end of the period	289	419
Allowance for credit losses	419	419		419
Credit card and other consumer
Allowance for Loan and Lease Losses [Roll Forward]
Allowance for loan and lease losses, beginning of the period	3,229	3,471	4,047
Loans and leases charged off	(3,774)	(3,553)	(3,620)
Recoveries of loans and leases previously charged off	809	770	813
Net charge-offs	(2,965)	(2,783)	(2,807)
Provision for loan and lease losses	3,437	2,826	2,278
Other	(38)	(42)	(47)
Allowance for loan and lease losses, December 31				3,472
Less: Allowance included in assets of business held for sale (6)				(243)
Allowance for loan and lease losses, end of the period	3,663	3,229	3,471
Reserve for unfunded lending commitments, beginning of the period	3,229	3,471
Reserve for unfunded lending commitments, end of the period	3,663	3,229	3,471
Allowance for credit losses	3,229	3,471	3,471	3,229
Credit card and other consumer | Unfunded loan commitments
Allowance for Loan and Lease Losses [Roll Forward]
Other		0
Reserve for unfunded lending commitments, beginning of the period	0	0	0
Provision for unfunded lending commitments	0	0	0
Reserve for unfunded lending commitments, end of the period	0	0	0
Allowance for credit losses	0	0	0	0
Credit card and other consumer | Purchased Credit-impaired
Allowance for Loan and Lease Losses [Roll Forward]
Loans and leases charged off	0	0	0
Commercial
Allowance for Loan and Lease Losses [Roll Forward]
Allowance for loan and lease losses, beginning of the period	5,258	4,849	4,437
Loans and leases charged off	(1,075)	(740)	(644)
Recoveries of loans and leases previously charged off	174	238	222
Net charge-offs	(901)	(502)	(422)
Provision for loan and lease losses	654	1,013	835
Other	(1)	(102)	(1)
Allowance for loan and lease losses, end of the period	5,010	5,258	4,849
Reserve for unfunded lending commitments, beginning of the period	6,020	5,495
Reserve for unfunded lending commitments, end of the period	5,787	6,020	5,495
Allowance for credit losses	6,020	5,495	5,495	6,020
Commercial | Unfunded loan commitments
Allowance for Loan and Lease Losses [Roll Forward]
Other		100
Reserve for unfunded lending commitments, beginning of the period	762	646	528
Provision for unfunded lending commitments	15	16	118
Reserve for unfunded lending commitments, end of the period	777	762	646
Allowance for credit losses	762	646	528	$ 762
Commercial | Purchased Credit-impaired
Allowance for Loan and Lease Losses [Roll Forward]
Loans and leases charged off	$ 0	$ 0	$ 0

Allowance for Credit Losses 105

Allowance for Credit Losses - Allowance and Carrying Value by Portfolio Segment (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Impaired loans and troubled debt restructurings
Allowance for loan and lease losses	$ 663	$ 818
Carrying value	$ 15,451	$ 19,220
Allowance as a percentage of carrying value	4.29%	4.26%
Loans collectively evaluated for impairment
Allowance for loan and lease losses	$ 9,441	$ 10,243
Carrying value	$ 904,871	$ 875,854
Allowance as a percentage of carrying value	1.04%	1.17%
Purchased credit-impaired loans
Valuation allowance	$ 11,170	$ 11,999	$ 12,880
Valuation allowance as a percentage of carrying value	2.70%	3.05%
Less: Assets of business held for sale
Less: Allowance included in assets of business held for sale		$ (243)
Carrying value		(9,214)
Total
Allowance for loan and lease losses	$ 10,393	11,237	12,234	$ 14,419
Carrying value	$ 931,039	$ 899,598
Allowance as a percentage of carrying value	1.12%	1.25%
Loans and leases	$ 936,749	$ 906,683
Estimate of Fair Value Measurement
Total
Loans and leases	5,710	7,085
Small Business Commercial Loan | United States
Impaired loans and troubled debt restructurings
Allowance for loan and lease losses	27	27
Purchased Credit-impaired
Purchased credit-impaired loans
Valuation allowance	289	419
Carrying value gross of valuation allowance	10,717	13,738
Total
Loans and leases	10,717
Consumer real estate
Impaired loans and troubled debt restructurings
Allowance for loan and lease losses	348	356
Carrying value	$ 12,554	$ 15,408
Allowance as a percentage of carrying value	2.77%	2.31%
Loans collectively evaluated for impairment
Allowance for loan and lease losses	$ 1,083	$ 1,975
Carrying value	$ 238,284	$ 229,094
Allowance as a percentage of carrying value	0.45%	0.86%
Purchased credit-impaired loans
Valuation allowance	$ 1,720	$ 2,750	3,914
Valuation allowance as a percentage of carrying value	2.70%	3.05%
Total
Allowance for loan and lease losses	$ 1,720	$ 2,750	3,914	5,935
Carrying value	$ 261,555	$ 258,240
Allowance as a percentage of carrying value	0.66%	1.06%
Consumer real estate | Estimate of Fair Value Measurement
Total
Loans and leases	$ 928	$ 1,100
Consumer real estate | Purchased Credit-impaired
Purchased credit-impaired loans
Valuation allowance	289	419
Carrying value gross of valuation allowance	10,717	13,738
Credit card and other consumer
Impaired loans and troubled debt restructurings
Allowance for loan and lease losses	125	189
Carrying value	$ 490	$ 610
Allowance as a percentage of carrying value	25.51%	30.98%
Loans collectively evaluated for impairment
Allowance for loan and lease losses	$ 3,538	$ 3,283
Carrying value	$ 192,303	$ 197,470
Allowance as a percentage of carrying value	1.84%	1.66%
Purchased credit-impaired loans
Valuation allowance	$ 3,663	$ 3,229	3,471
Less: Assets of business held for sale
Less: Allowance included in assets of business held for sale		(243)
Carrying value		(9,214)
Total
Allowance for loan and lease losses	3,663	3,229	3,471	4,047
Carrying value	$ 192,793	$ 188,866
Allowance as a percentage of carrying value	1.90%	1.71%
Credit card and other consumer | Credit Card Receivable | United States
Total
Loans and leases	$ 96,285	$ 92,278
Credit card and other consumer | Credit Card Receivable | Non United States
Total
Related allowance, including loans held for sale		61
Carrying value		182
Commercial
Impaired loans and troubled debt restructurings
Allowance for loan and lease losses	190	273
Carrying value	$ 2,407	$ 3,202
Allowance as a percentage of carrying value	7.89%	8.53%
Loans collectively evaluated for impairment
Allowance for loan and lease losses	$ 4,820	$ 4,985
Carrying value	$ 474,284	$ 449,290
Allowance as a percentage of carrying value	1.02%	1.11%
Purchased credit-impaired loans
Valuation allowance	$ 5,787	$ 6,020	5,495
Total
Allowance for loan and lease losses	5,010	5,258	$ 4,849	$ 4,437
Carrying value	$ 476,691	$ 452,492
Allowance as a percentage of carrying value	1.05%	1.16%
Loans and leases	$ 481,473	$ 458,526
Commercial | Estimate of Fair Value Measurement
Total
Loans and leases	4,782	6,034
Commercial | United States
Total
Loans and leases	284,836	270,372
Commercial | Non United States
Total
Loans and leases	$ 97,792	$ 89,397

Securitizations and Other Va106

Securitizations and Other Variable Interest Entities - First Lien Mortgage Securitizations (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Residential Mortgage - Agency
Securitization or Asset-backed Financing Arrangement, Financial Asset for which Transfer is Accounted as Sale [Line Items]
Cash proceeds from new securitizations	$ 14,467,000,000	$ 24,201,000,000	$ 27,164,000,000
Gains on securitizations	158,000,000	370,000,000	894,000,000
Repurchases from securitization trusts	2,713,000,000	3,611,000,000	3,716,000,000
Gain (loss) on loans securitized	243,000,000	487,000,000	750,000,000
Assets of deconsolidated securitization vehicles	0	3,800,000,000	4,500,000,000
Liabilities of deconsolidated securitization vehicles	0	628,000,000	0
Deconsolidated assets		706,000,000
Noncash investing and financing activities, deconsolidated liabilities		628,000,000
Gain (loss) on deconsolidation		125,000,000	287,000,000
First Lien Mortgages
Securitization or Asset-backed Financing Arrangement, Financial Asset for which Transfer is Accounted as Sale [Line Items]
Mortgage loans serviced for investors	277,600,000,000	326,200,000,000
Servicing fees	893,000,000	1,200,000,000	1,400,000,000
Transfers continuing involvement servicing fee advances	4,500,000,000	6,200,000,000
Commercial Mortgage
Securitization or Asset-backed Financing Arrangement, Financial Asset for which Transfer is Accounted as Sale [Line Items]
Cash proceeds from new securitizations	5,641,000,000	3,887,000,000	7,945,000,000
Gains on securitizations	91,000,000	38,000,000	49,000,000
Repurchases from securitization trusts	0	0	0
Level 2 | First Lien Mortgages
Securitization or Asset-backed Financing Arrangement, Financial Asset for which Transfer is Accounted as Sale [Line Items]
Transfers of financial assets accounted for as sale initial fair value of assets	$ 1,900,000,000	$ 4,200,000,000	$ 22,300,000,000

Securitizations and Other Va107

Securitizations and Other Variable Interest Entities - First Lien Mortgages VIE (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
On-balance sheet assets
Trading account assets	$ 209,358,000,000	$ 180,209,000,000
Debt securities carried at fair value	315,117,000,000	313,660,000,000
Held-to-maturity securities	125,013,000,000	117,071,000,000
Securities	440,130,000,000	430,731,000,000
Loans and leases	936,749,000,000	906,683,000,000
All other assets	132,741,000,000	123,996,000,000
Total assets	2,281,234,000,000	2,188,067,000,000
On-balance sheet liabilities
Long-term debt	227,402,000,000	216,823,000,000
Total liabilities	2,014,088,000,000	1,921,872,000,000
Other than temporary impairment losses recorded on debt securities	0	0	$ 0
Unpaid principal balance of mortgage loans eligible for repurchase	148,000,000	189,000,000
Principal amount that would be payable to the securitization vehicles	148,000,000	189,000,000
Unconsolidated VIEs | Residential Mortgage - Agency
Variable Interest Entity [Line Items]
Maximum loss exposure	19,110,000,000	22,661,000,000
On-balance sheet assets
Residual interests	0	0
All other assets	10,000,000	12,000,000
Total assets	19,110,000,000	22,661,000,000
Principal balance outstanding	232,761,000,000	265,332,000,000
Unconsolidated VIEs | Residential Mortgage - Agency | Senior Lien
On-balance sheet assets
Trading account assets	716,000,000	1,399,000,000
Debt securities carried at fair value	15,036,000,000	17,620,000,000
Held-to-maturity securities	3,348,000,000	3,630,000,000
Unconsolidated VIEs | Residential Mortgage - Agency | Junior Lien
On-balance sheet assets
Securities	0	0
Unconsolidated VIEs | Non-agency | Prime
Variable Interest Entity [Line Items]
Maximum loss exposure	689,000,000	757,000,000
On-balance sheet assets
Residual interests	0	0
All other assets	0	28,000,000
Total assets	488,000,000	498,000,000
Principal balance outstanding	10,549,000,000	16,280,000,000
Unconsolidated VIEs | Non-agency | Prime | Senior Lien
On-balance sheet assets
Trading account assets	6,000,000	20,000,000
Debt securities carried at fair value	477,000,000	441,000,000
Held-to-maturity securities	0	0
Unconsolidated VIEs | Non-agency | Prime | Junior Lien
On-balance sheet assets
Securities	5,000,000	9,000,000
Unconsolidated VIEs | Non-agency | Subprime
Variable Interest Entity [Line Items]
Maximum loss exposure	2,643,000,000	2,750,000,000
On-balance sheet assets
Residual interests	0	0
All other assets	0	0
Total assets	2,269,000,000	2,372,000,000
Principal balance outstanding	10,254,000,000	19,373,000,000
Unconsolidated VIEs | Non-agency | Subprime | Senior Lien
On-balance sheet assets
Trading account assets	10,000,000	112,000,000
Debt securities carried at fair value	2,221,000,000	2,235,000,000
Held-to-maturity securities	0	0
Unconsolidated VIEs | Non-agency | Subprime | Junior Lien
On-balance sheet assets
Securities	38,000,000	25,000,000
Unconsolidated VIEs | Non-agency | Alt-A
Variable Interest Entity [Line Items]
Maximum loss exposure	403,000,000	560,000,000
On-balance sheet assets
Residual interests	0	0
All other assets	0	113,000,000
Total assets	403,000,000	560,000,000
Principal balance outstanding	28,129,000,000	35,788,000,000
Unconsolidated VIEs | Non-agency | Alt-A | Senior Lien
On-balance sheet assets
Trading account assets	50,000,000	118,000,000
Debt securities carried at fair value	351,000,000	305,000,000
Held-to-maturity securities	0	0
Unconsolidated VIEs | Non-agency | Alt-A | Junior Lien
On-balance sheet assets
Securities	2,000,000	24,000,000
Unconsolidated VIEs | Commercial Mortgage
Variable Interest Entity [Line Items]
Maximum loss exposure	585,000,000	344,000,000
On-balance sheet assets
Residual interests	19,000,000	25,000,000
All other assets	0	0
Total assets	470,000,000	221,000,000
Principal balance outstanding	26,504,000,000	23,826,000,000
Unconsolidated VIEs | Commercial Mortgage | Senior Lien
On-balance sheet assets
Trading account assets	108,000,000	51,000,000
Debt securities carried at fair value	0	0
Held-to-maturity securities	274,000,000	64,000,000
Unconsolidated VIEs | Commercial Mortgage | Junior Lien
On-balance sheet assets
Securities	69,000,000	81,000,000
Unconsolidated VIEs | First Lien Mortgage Securitization Trusts
On-balance sheet liabilities
Other than temporary impairment losses recorded on held-to-maturity securities		0	$ 0
Consolidated VIEs
On-balance sheet assets
Trading account assets	6,521,000,000	5,773,000,000
Loans and leases	48,929,000,000	56,001,000,000
All other assets	1,694,000,000	1,596,000,000
Total assets	56,155,000,000	62,526,000,000
On-balance sheet liabilities
Long-term debt	9,873,000,000	10,646,000,000
All other liabilities	37,000,000	41,000,000
Total liabilities	10,222,000,000	11,035,000,000
Consolidated VIEs | Residential Mortgage - Agency
Variable Interest Entity [Line Items]
Maximum loss exposure	14,502,000,000	18,084,000,000
On-balance sheet assets
Trading account assets	232,000,000	434,000,000
Loans and leases	14,030,000,000	17,223,000,000
All other assets	240,000,000	427,000,000
Total assets	14,502,000,000	18,084,000,000
On-balance sheet liabilities
Long-term debt	0	0
All other liabilities	3,000,000	4,000,000
Total liabilities	3,000,000	4,000,000
Consolidated VIEs | Non-agency | Prime
Variable Interest Entity [Line Items]
Maximum loss exposure	571,000,000	0
On-balance sheet assets
Trading account assets	571,000,000	0
Loans and leases	0	0
All other assets	0	0
Total assets	571,000,000	0
On-balance sheet liabilities
Long-term debt	0	0
All other liabilities	0	0
Total liabilities	0	0
Consolidated VIEs | Non-agency | Subprime
Variable Interest Entity [Line Items]
Maximum loss exposure	0	0
On-balance sheet assets
Trading account assets	0	0
Loans and leases	0	0
All other assets	0	0
Total assets	0	0
On-balance sheet liabilities
Long-term debt	0	0
All other liabilities	0	0
Total liabilities	0	0
Consolidated VIEs | Non-agency | Alt-A
Variable Interest Entity [Line Items]
Maximum loss exposure	0	25,000,000
On-balance sheet assets
Trading account assets	0	99,000,000
Loans and leases	0	0
All other assets	0	0
Total assets	0	99,000,000
On-balance sheet liabilities
Long-term debt	0	74,000,000
All other liabilities	0	0
Total liabilities	0	74,000,000
Consolidated VIEs | Commercial Mortgage
Variable Interest Entity [Line Items]
Maximum loss exposure	0	0
On-balance sheet assets
Trading account assets	0	0
Loans and leases	0	0
All other assets	0	0
Total assets	0	0
On-balance sheet liabilities
Long-term debt	0	0
All other liabilities	0	0
Total liabilities	$ 0	$ 0

Securitizations and Other Va108

Securitizations and Other Variable Interest Entities - Home Equity Loan, Credit Card and Other Asset-backed VIEs (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
On-balance sheet assets
Trading account assets	$ 209,358	$ 180,209
Debt securities carried at fair value	315,117	313,660
Held-to-maturity securities	125,013	117,071
Securities	440,130	430,731
Loans and leases	936,749	906,683
Allowance for loan and lease losses	(10,393)	(11,237)	$ (12,234)	$ (14,419)
All other assets	132,741	123,996
Total assets	2,281,234	2,188,067
On-balance sheet liabilities
Long-term debt	227,402	216,823
Total liabilities	2,014,088	1,921,872
Consolidated VIEs
On-balance sheet assets
Trading account assets	6,521	5,773
Loans and leases	48,929	56,001
Allowance for loan and lease losses	(1,016)	(1,032)
All other assets	1,694	1,596
Total assets	56,155	62,526
On-balance sheet liabilities
Long-term debt	9,873	10,646
All other liabilities	37	41
Total liabilities	10,222	11,035
Home equity lines of credit | Unconsolidated VIEs
Variable Interest Entity [Line Items]
Maximum loss exposure	1,522	2,732
On-balance sheet assets
Total assets	36	46
Unconsolidated total assets of VIEs	2,432	4,274
Home equity lines of credit | Consolidated VIEs
Variable Interest Entity [Line Items]
Maximum loss exposure	112	149
On-balance sheet assets
Trading account assets	0	0
Loans and leases	177	244
Allowance for loan and lease losses	(9)	(16)
All other assets	6	7
Total assets	174	235
On-balance sheet liabilities
Short-term borrowings	0	0
Long-term debt	76	108
All other liabilities	0	0
Total liabilities	76	108
Home equity lines of credit | Senior Lien | Unconsolidated VIEs
On-balance sheet assets
Trading account assets	0	0
Debt securities carried at fair value	36	46
Held-to-maturity securities	0	0
Home equity lines of credit | Junior Lien | Unconsolidated VIEs
On-balance sheet assets
Securities	0	0
Credit Card Receivable | Unconsolidated VIEs
Variable Interest Entity [Line Items]
Maximum loss exposure	0	0
On-balance sheet assets
Total assets	0	0
Unconsolidated total assets of VIEs	0	0
Credit Card Receivable | Consolidated VIEs
Variable Interest Entity [Line Items]
Maximum loss exposure	24,337	25,859
On-balance sheet assets
Trading account assets	0	0
Loans and leases	32,554	35,135
Allowance for loan and lease losses	(988)	(1,007)
All other assets	1,385	793
Total assets	32,951	34,921
On-balance sheet liabilities
Short-term borrowings	0	0
Long-term debt	8,598	9,049
All other liabilities	16	13
Total liabilities	8,614	9,062
Residual interests	15,600	17,600
Credit Card Receivable | Senior Lien | Unconsolidated VIEs
On-balance sheet assets
Trading account assets	0	0
Debt securities carried at fair value	0	0
Held-to-maturity securities	0	0
Credit Card Receivable | Junior Lien | Unconsolidated VIEs
On-balance sheet assets
Securities	0	0
Resecuritization Trusts | Unconsolidated VIEs
Variable Interest Entity [Line Items]
Maximum loss exposure	8,204	9,906
On-balance sheet assets
Total assets	8,204	9,906
Unconsolidated total assets of VIEs	19,281	22,155
Resecuritization Trusts | Consolidated VIEs
Variable Interest Entity [Line Items]
Maximum loss exposure	628	420
On-balance sheet assets
Trading account assets	1,557	1,428
Loans and leases	0	0
Allowance for loan and lease losses	0	0
All other assets	0	0
Total assets	1,557	1,428
On-balance sheet liabilities
Short-term borrowings	0	0
Long-term debt	929	1,008
All other liabilities	0	0
Total liabilities	929	1,008
Resecuritization Trusts | Senior Lien | Unconsolidated VIEs
On-balance sheet assets
Trading account assets	869	902
Debt securities carried at fair value	1,661	2,338
Held-to-maturity securities	5,644	6,569
Resecuritization Trusts | Junior Lien | Unconsolidated VIEs
On-balance sheet assets
Securities	30	97
Municipal Bond Trusts | Unconsolidated VIEs
Variable Interest Entity [Line Items]
Maximum loss exposure	1,631	1,635
On-balance sheet assets
Total assets	33	0
Unconsolidated total assets of VIEs	2,287	2,406
Municipal Bond Trusts | Consolidated VIEs
Variable Interest Entity [Line Items]
Maximum loss exposure	1,453	1,442
On-balance sheet assets
Trading account assets	1,452	1,454
Loans and leases	0	0
Allowance for loan and lease losses	0	0
All other assets	1	0
Total assets	1,453	1,454
On-balance sheet liabilities
Short-term borrowings	312	348
Long-term debt	0	12
All other liabilities	0	0
Total liabilities	312	360
Municipal Bond Trusts | Senior Lien | Unconsolidated VIEs
On-balance sheet assets
Trading account assets	33	0
Debt securities carried at fair value	0	0
Held-to-maturity securities	0	0
Municipal Bond Trusts | Junior Lien | Unconsolidated VIEs
On-balance sheet assets
Securities	$ 0	$ 0

Securitizations and Other Va109

Securitizations and Other Variable Interest Entities - Other Asset-backed Securitizations, Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Home equity lines of credit
Variable Interest Entity [Line Items]
Assets of deconsolidated securitization vehicles	$ 0	$ 0	$ 488,000,000
Liabilities of deconsolidated securitization vehicles	0	0	611,000,000
Gain (loss) on deconsolidation			123,000,000
Credit Card Receivable
Variable Interest Entity [Line Items]
Principal balance outstanding	$ 7,400,000,000	7,500,000,000
Transferred financial assets, stated interest rate	0.00%
Credit Card Receivable | Senior Lien
Variable Interest Entity [Line Items]
Transferred financial assets, amount issued	$ 3,100,000,000	750,000,000	2,300,000,000
Credit Card Receivable | Junior Lien
Variable Interest Entity [Line Items]
Transferred financial assets, amount issued	500,000,000	121,000,000	371,000,000
Resecuritization Trusts
Variable Interest Entity [Line Items]
Cash proceeds from new securitizations	25,100,000,000	23,400,000,000	30,700,000,000
Resecuritization Trusts | Debt securities
Variable Interest Entity [Line Items]
Cash proceeds from new securitizations	$ 3,300,000,000	3,300,000,000	9,800,000,000
Resecuritization Trusts | Held-to-maturity Securities
Variable Interest Entity [Line Items]
Cash proceeds from new securitizations			$ 6,900,000,000
Municipal Bond Trusts | Unconsolidated VIEs
Variable Interest Entity [Line Items]
Liquidity commitments to unconsolidated securitization trusts		$ 1,600,000,000
Weighted average remaining life of bonds held in the trusts in years	6 years

Securitizations and Other Va110

Securitizations and Other Variable Interest Entities - Other Variable Interest Entities (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
On-balance sheet assets
Trading account assets	$ 209,358	$ 180,209
Debt securities carried at fair value	315,117	313,660
Loans and leases	936,749	906,683
Allowance for loan and lease losses	(10,393)	(11,237)	$ (12,234)	$ (14,419)
Loans held-for-sale	11,430	9,066
All other assets	132,741	123,996
Total assets	2,281,234	2,188,067
On-balance sheet liabilities
Long-term debt	227,402	216,823
Total liabilities	2,014,088	1,921,872
Consolidated VIEs
On-balance sheet assets
Trading account assets	6,521	5,773
Loans and leases	48,929	56,001
Allowance for loan and lease losses	(1,016)	(1,032)
Loans held-for-sale	27	188
All other assets	1,694	1,596
Total assets	56,155	62,526
On-balance sheet liabilities
Long-term debt	9,873	10,646
All other liabilities	37	41
Total liabilities	10,222	11,035
Other Variable Interest Entities
Variable Interest Entity [Line Items]
Maximum loss exposure	24,445	23,868
On-balance sheet assets
Trading account assets	3,055	2,591
Debt securities carried at fair value	160	122
Loans and leases	5,748	6,648
Allowance for loan and lease losses	(35)	(33)
Loans held-for-sale	967	652
All other assets	14,338	13,525
Total assets	24,233	23,505
On-balance sheet liabilities
Long-term debt	270	395
All other liabilities	3,435	2,983
Total liabilities	3,705	3,378
Consolidated total assets of VIEs	4,947	6,305
Unconsolidated total assets of VIEs	69,746	62,269
Total assets of VIEs	74,693	68,574
Other Variable Interest Entities | Consolidated VIEs
Variable Interest Entity [Line Items]
Maximum loss exposure	4,660	6,114
On-balance sheet assets
Trading account assets	2,709	2,358
Debt securities carried at fair value	0	0
Loans and leases	2,152	3,399
Allowance for loan and lease losses	(3)	(9)
Loans held-for-sale	27	188
All other assets	62	369
Total assets	4,947	6,305
On-balance sheet liabilities
Long-term debt	270	395
All other liabilities	18	24
Total liabilities	288	419
Long-term debt with recourse to general corporation credit	1	229
Other Variable Interest Entities | Unconsolidated VIEs
Variable Interest Entity [Line Items]
Maximum loss exposure	19,785	17,754
On-balance sheet assets
Trading account assets	346	233
Debt securities carried at fair value	160	122
Loans and leases	3,596	3,249
Allowance for loan and lease losses	(32)	(24)
Loans held-for-sale	940	464
All other assets	14,276	13,156
Total assets	19,286	17,200
On-balance sheet liabilities
Long-term debt	0	0
All other liabilities	3,417	2,959
Total liabilities	$ 3,417	$ 2,959

Securitizations and Other Va111

Securitizations and Other Variable Interest Entities - Other Variable Interest Entities, Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Variable Interest Entity [Line Items]
Total assets	$ 2,281,234	$ 2,188,067
Consolidated VIEs
Variable Interest Entity [Line Items]
Total assets	56,155	62,526
Customer Vehicles
Variable Interest Entity [Line Items]
Maximum loss exposure	2,300	2,900
Liquidity commitments to unconsolidated securitization trusts	442	323
Collateralized Debt Obligations
Variable Interest Entity [Line Items]
Maximum loss exposure	358	430
Investment Vehicles
Variable Interest Entity [Line Items]
Maximum loss exposure	5,700	5,100
Investment Vehicles | Consolidated VIEs
Variable Interest Entity [Line Items]
Total assets	249	846
Investment Vehicles | Unconsolidated VIEs
Variable Interest Entity [Line Items]
Maximum loss exposure	50	150
Total assets	20,300	17,300
Consolidated total assets of VIEs	39	75
Leveraged Lease Trusts | Consolidated VIEs
Variable Interest Entity [Line Items]
Total assets	2,000	2,600
Tax Credit Vehicles
Investments in Affordable Housing Projects [Abstract]
Unfunded commitments	$ 3,100	2,700
Unfunded commitment payment period	5 years
Tax credits and other benefits	$ 1,000	1,100	$ 928
Expected tax benefits recognized, as a percentage	25.00%
Tax Credit Vehicles | Other income
Investments in Affordable Housing Projects [Abstract]
Pretax losses	$ 766	789	$ 629
Tax Credit Vehicles | Other assets
Investments in Affordable Housing Projects [Abstract]
Investments in affordable housing project investments	8,000	7,400
Tax Credit Vehicles | Unconsolidated VIEs
Variable Interest Entity [Line Items]
Maximum loss exposure	$ 13,800	$ 12,600

Representations and Warranti112

Representations and Warranties Obligations and Corporate Guarantees - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Loss Contingencies [Line Items]
New purchase claims	$ 151
Claims resolved	794
Claims resolved by settlements	640
Unresolved repurchase claims, net of duplicated claims	17,634	$ 18,277
Maximum
Loss Contingencies [Line Items]
Maximum estimated range of possible loss	1,300
Representations and Warranties Exposure | Maximum
Loss Contingencies [Line Items]
Maximum estimated range of possible loss	1,000
Sponsors of Third-Party Securitizations
Loss Contingencies [Line Items]
Unresolved repurchase claims, net of duplicated claims	1,300	1,300
Private-Label Securitization Trustees | Mortgage Loans Originated between 2004 and 2008
Loss Contingencies [Line Items]
Claims related to loans in specific private-label securitization groups	$ 6,900	$ 5,600

Representations and Warranti113

Representations and Warranties Obligations and Corporate Guarantees - Unresolved Repurchase Claims by Counterparty, net of duplicate claims (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Loss Contingencies [Line Items]
Unresolved repurchase claims, net of duplicated claims	$ 17,634	$ 18,277
Outstanding claims with review	11,400	11,900
Outstanding claims without review	4,700	4,800
Private-label securitization trustees, whole-loan investors, including third-party securitization sponsors and other
Loss Contingencies [Line Items]
Unresolved repurchase claims, net of duplicated claims	16,064	16,685
Monolines
Loss Contingencies [Line Items]
Unresolved repurchase claims, net of duplicated claims	1,565	1,583
GSEs
Loss Contingencies [Line Items]
Unresolved repurchase claims, net of duplicated claims	$ 5	$ 9

Representations and Warranti114

Representations and Warranties Obligations and Corporate Guarantees - Schedule of Reserves (Details) - USD ($) $ in Millions	1 Months Ended	12 Months Ended
	Feb. 29, 2016	Dec. 31, 2017	Dec. 31, 2016
Bank of New York Mellon, as Trustee Settlement
Loss Contingency Accrual [Roll Forward]
Settlement payment	$ 8,500
Representations and Warranties Obligations and Corporate Guarantees
Loss Contingency Accrual [Roll Forward]
Reserve for representations and warranties and corporate guarantees, January 1		$ 2,339	$ 11,326
Additions for new sales		4	4
Payments		(814)	(9,097)
Liability for representations and warranties and corporate guarantees, December 31		1,922	2,339
Representations and Warranties Obligations and Corporate Guarantees | Mortgage Banking Income
Loss Contingency Accrual [Roll Forward]
Provision		$ 393	$ 106

Goodwill and Intangible Asse115

Goodwill and Intangible Assets - Schedule of Goodwill (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Goodwill [Line Items]
Total goodwill	$ 68,951	$ 68,969
Less: Goodwill of business held for sale		(775)
Operating Segments | Consumer Banking
Goodwill [Line Items]
Total goodwill	30,123	30,123
Operating Segments | Global Wealth & Investment Management
Goodwill [Line Items]
Total goodwill	9,677	9,681
Operating Segments | Global Banking
Goodwill [Line Items]
Total goodwill	23,923	23,923
Operating Segments | Global Markets
Goodwill [Line Items]
Total goodwill	5,182	5,197
All Other
Goodwill [Line Items]
Total goodwill	$ 46
All Other		$ 820

Goodwill and Intangible Asse116

Goodwill and Intangible Assets - Schedule of Intangible Assets (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Intangible Assets [Abstract]
Gross Carrying Value	$ 13,640
Accumulated Amortization	11,328
Net Carrying Value	2,312
Gross Carrying Value		$ 14,553
Accumulated Amortization		11,564
Net Carrying Value		2,989
International Consumer Credit Card Business | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Intangible Assets [Abstract]
Disposal group, intangible assets		67
Trade Names
Intangible Assets [Abstract]
Intangible assets, net (excluding goodwill)	1,600	1,600
Purchased credit card relationships
Intangible Assets [Abstract]
Gross Carrying Value	5,919
Accumulated Amortization	5,604
Net Carrying Value	315
Gross Carrying Value		6,830
Accumulated Amortization		6,243
Net Carrying Value		587
Core deposit intangibles
Intangible Assets [Abstract]
Gross Carrying Value	3,835
Accumulated Amortization	2,140
Net Carrying Value	1,695
Gross Carrying Value		3,836
Accumulated Amortization		2,046
Net Carrying Value		1,790
Customer relationships
Intangible Assets [Abstract]
Gross Carrying Value	3,886
Accumulated Amortization	3,584
Net Carrying Value	$ 302
Gross Carrying Value		3,887
Accumulated Amortization		3,275
Net Carrying Value		$ 612

Goodwill and Intangible Asse117

Goodwill and Intangible Assets - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill impairment	$ 0
Amortization of intangibles	621,000,000	$ 730,000,000	$ 834,000,000
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2,018	538,000,000
2,019	105,000,000
2,020	53,000,000
2,021	0
2,022	0
Thereafter	$ 0

Deposits (Details)

Deposits (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Deposits [Abstract]
Time deposits that met or exceeded the FDIC insurance limit	$ 17,000	$ 18,300
U.S.
Time Deposits [Line Items]
Three Months or Less	12,505
Over Three Months to Twelve Months	10,660
Thereafter	2,027
Total	25,192	32,898
Non-U.S.
Time Deposits [Line Items]
Three Months or Less	10,561
Over Three Months to Twelve Months	3,652
Thereafter	1,259
Total	$ 15,472	$ 14,677

Deposits - Contractual Maturiti

Deposits - Contractual Maturities (Details) $ in Millions	Dec. 31, 2017USD ($)
Time Deposits [Line Items]
Due in 2018	$ 61,038
Due in 2019	3,280
Due in 2020	1,710
Due in 2021	529
Due in 2022	1,014
Thereafter	273
Total time deposits	67,844
U.S.
Time Deposits [Line Items]
Due in 2018	46,774
Due in 2019	2,623
Due in 2020	1,661
Due in 2021	514
Due in 2022	452
Thereafter	264
Total time deposits	52,288
Non-U.S.
Time Deposits [Line Items]
Due in 2018	14,264
Due in 2019	657
Due in 2020	49
Due in 2021	15
Due in 2022	562
Thereafter	9
Total time deposits	$ 15,556

Federal Funds Sold or Purcha120

Federal Funds Sold or Purchased, Securities Financing Agreements and Short-term Borrowings (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Federal funds purchased and securities loaned or sold under agreements to repurchase
Amount
Average during year	$ 199,501	$ 183,818
Maximum month-end balance during year	$ 218,017	$ 196,631
Rate
Average during year (percent)	1.30%	0.97%
Short-term borrowings
Amount
Average during year	$ 37,337	$ 29,440
Maximum month-end balance during year	$ 46,202	$ 33,051
Rate
Average during year (percent)	2.48%	1.95%
Federal funds sold and securities borrowed or purchased under agreements to resell
Amount
Average during year	$ 222,818	$ 216,161
Maximum month-end asset outstanding amount	$ 237,064	$ 225,015
Rate
Average asset outstanding rate (percent)	1.07%	0.52%

Federal Funds Sold or Purcha121

Federal Funds Sold or Purchased, Securities Financing Agreements and Short-term Borrowings - Narrative (Details) - Subsidiaries - Bank of America, N.A. - USD ($) $ in Billions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Federal Funds Sold or Purchased, Securities Financing Agreements and Short-Term Borrowings [Line Items]
Minimum maturity period	7 days
Debt Instrument, Registration Statement, Short-Term Debt Outstanding Under Program	$ 14.2	$ 9.3
Bank Notes
Federal Funds Sold or Purchased, Securities Financing Agreements and Short-Term Borrowings [Line Items]
Debt authorized	$ 75

Federal Funds Sold or Purcha122

Federal Funds Sold or Purchased, Securities Financing Agreements and Short-term Borrowings - Offsetting Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Securities borrowed or purchased under agreements to resell:
Gross Assets	$ 348,472	$ 326,970
Amounts Offset	(135,725)	(128,746)
Net Balance Sheet Amount	212,747	198,224
Financial Instruments	(165,720)	(154,974)
Net Assets	47,027	43,250
Securities loaned or sold under agreements to repurchase:
Gross Liabilities	312,582	299,028
Amounts Offset	(135,725)	(128,746)
Net Balance Sheet Amount	176,857	170,282
Financial Instruments	(146,205)	(140,774)
Net Liabilities	30,652	29,508
Other:
Gross Liabilities	22,711	14,448
Amounts Offset	0	0
Net Balance Sheet Amount	22,711	14,448
Financial Instruments	(22,711)	(14,448)
Net Liabilities	0	0
Total Securities Financing Agreements Liability:
Gross Liabilities	335,293	313,476
Amounts Offset	(135,725)	(128,746)
Net Balance Sheet Amount	199,568	184,730
Financial Instruments	(168,916)	(155,222)
Net Liabilities	30,652	29,508
Loans and leases repurchase activity	$ 10,200	$ 10,100

Federal Funds Sold or Purcha123

Federal Funds Sold or Purchased, Securities Financing Agreements and Short-term Borrowings - Remaining Contractual Maturity (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Remaining Contractual Maturity
Securities sold under agreements to repurchase	$ 290,895	$ 280,236
Securities loaned	21,687	18,792
Other	22,711	14,448
Total	$ 335,293	$ 313,476
Maximum agreement maturity period (less than)	3 years	3 years
Overnight and Continuous
Remaining Contractual Maturity
Securities sold under agreements to repurchase	$ 125,956	$ 129,853
Securities loaned	9,853	8,564
Other	22,711	14,448
Total	158,520	152,865
30 Days or Less
Remaining Contractual Maturity
Securities sold under agreements to repurchase	79,913	77,780
Securities loaned	5,658	6,602
Other	0	0
Total	85,571	84,382
After 30 Days Through 90 Days
Remaining Contractual Maturity
Securities sold under agreements to repurchase	46,091	31,851
Securities loaned	2,043	1,473
Other	0	0
Total	48,134	33,324
Greater than 90 Days
Remaining Contractual Maturity
Securities sold under agreements to repurchase	38,935	40,752
Securities loaned	4,133	2,153
Other	0	0
Total	$ 43,068	$ 42,905

Federal Funds Sold or Purcha124

Federal Funds Sold or Purchased, Securities Financing Agreements and Short-term Borrowings - Class of Collateral Pledged (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Class of Collateral Pledged
Securities Sold Under Agreements to Repurchase	$ 290,895	$ 280,236
Securities Loaned	21,687	18,792
Other	22,711	14,448
Total	335,293	313,476
U.S. Treasury and agency securities
Class of Collateral Pledged
Securities Sold Under Agreements to Repurchase	158,299	153,184
Securities Loaned	0	0
Other	409	70
Total	158,708	153,254
Corporate securities, trading loans and other
Class of Collateral Pledged
Securities Sold Under Agreements to Repurchase	12,787	11,086
Securities Loaned	2,669	1,630
Other	624	127
Total	16,080	12,843
Equity securities
Class of Collateral Pledged
Securities Sold Under Agreements to Repurchase	23,975	24,007
Securities Loaned	13,523	11,175
Other	21,628	14,196
Total	59,126	49,378
Non-U.S. sovereign debt
Class of Collateral Pledged
Securities Sold Under Agreements to Repurchase	90,857	84,171
Securities Loaned	5,495	5,987
Other	50	55
Total	96,402	90,213
Mortgage trading loans and ABS
Class of Collateral Pledged
Securities Sold Under Agreements to Repurchase	4,977	7,788
Securities Loaned	0	0
Other	0	0
Total	$ 4,977	$ 7,788

Long-term Debt - Balances (Deta

Long-term Debt - Balances (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Long-term debt	$ 227,402	$ 216,823
Bank of America Corporation
Debt Instrument [Line Items]
Long-term debt	185,953	173,375
Subsidiaries
Debt Instrument [Line Items]
Long-term debt	19,831	16,697
Subsidiaries | Bank of America, N.A.
Debt Instrument [Line Items]
Long-term debt	21,618	26,751
Senior notes | Bank of America Corporation
Debt Instrument [Line Items]
Long-term debt	140,596
Senior notes | Bank of America Corporation | Fixed, with a weighted-average rate of 4.25%, ranging from 0.39% to 8.40%, due 2017 to 2046
Debt Instrument [Line Items]
Long-term debt	119,548	108,933
Senior notes | Bank of America Corporation | Floating, with a weighted-average rate of 1.73%, ranging from 0.19% to 5.64%, due 2017 to 2044
Debt Instrument [Line Items]
Long-term debt	21,048	13,164
Senior notes | Subsidiaries | Bank of America, N.A.
Debt Instrument [Line Items]
Long-term debt	5,719
Senior notes | Subsidiaries | Bank of America, N.A. | Fixed, with a weighted-average rate of 1.67%, ranging from 0.02% to 2.05%, due 2017 to 2018
Debt Instrument [Line Items]
Long-term debt	4,686	5,936
Senior notes | Subsidiaries | Bank of America, N.A. | Floating, with a weighted-average rate of 1.66%, ranging from 0.94% to 2.86%, due 2017 to 2041
Debt Instrument [Line Items]
Long-term debt	1,033	3,383
Senior structured notes | Bank of America Corporation
Debt Instrument [Line Items]
Long-term debt	15,460	17,049
Subordinated notes | Bank of America Corporation
Debt Instrument [Line Items]
Long-term debt	26,062
Subordinated notes | Bank of America Corporation | Fixed, with a weighted-average rate of 4.87%, ranging from 2.40% to 8.57%, due 2017 to 2045
Debt Instrument [Line Items]
Long-term debt	22,004	26,047
Subordinated notes | Bank of America Corporation | Floating, with a weighted-average rate of 0.83%, ranging from 0.23% to 2.52%, due 2017 to 2026
Debt Instrument [Line Items]
Long-term debt	4,058	4,350
Subordinated notes | Subsidiaries | Bank of America, N.A.
Debt Instrument [Line Items]
Long-term debt	1,680
Subordinated notes | Subsidiaries | Bank of America, N.A. | Fixed, with a weighted-average rate of 5.66%, ranging from 5.30% to 6.10%, due 2017 to 2036
Debt Instrument [Line Items]
Long-term debt	1,679	4,424
Subordinated notes | Subsidiaries | Bank of America, N.A. | Floating, with a weighted-average rate of 1.26%, ranging from 0.85% to 1.26%, due 2017 to 2019
Debt Instrument [Line Items]
Long-term debt	1	598
Junior subordinated notes (related to trust preferred securities) | Bank of America Corporation
Debt Instrument [Line Items]
Long-term debt	3,835
Junior subordinated notes (related to trust preferred securities) | Bank of America Corporation | Fixed, with a weighted-average rate of 6.91%, ranging from 5.25% to 8.05%, due 2027 to 2067
Debt Instrument [Line Items]
Long-term debt	3,282	3,280
Junior subordinated notes (related to trust preferred securities) | Bank of America Corporation | Floating, with a weighted-average rate of 1.60%, ranging from 1.43% to 1.99%, due 2027 to 2056
Debt Instrument [Line Items]
Long-term debt	553	552
Advances from Federal Home Loan Banks | Subsidiaries | Bank of America, N.A.
Debt Instrument [Line Items]
Long-term debt	5,146
Advances from Federal Home Loan Banks | Subsidiaries | Bank of America, N.A. | Fixed, with a weighted-average rate of 5.31%, ranging from 0.01% to 7.72%, due 2017 to 2034
Debt Instrument [Line Items]
Long-term debt	146	162
Advances from Federal Home Loan Banks | Subsidiaries | Bank of America, N.A. | Floating, with a weighted-average rate of 1.42%, ranging from 1.35% to 1.60%, due 2018 to 2019
Debt Instrument [Line Items]
Long-term debt	5,000	0
Securitizations and other BANA VIEs | Subsidiaries | Bank of America, N.A.
Debt Instrument [Line Items]
Long-term debt	8,641	9,164
Other | Subsidiaries
Debt Instrument [Line Items]
Long-term debt	25	44
Other | Subsidiaries | Bank of America, N.A.
Debt Instrument [Line Items]
Long-term debt	432	3,084
Structured liabilities | Subsidiaries
Debt Instrument [Line Items]
Long-term debt	18,574	15,171
Nonbank VIEs | Subsidiaries
Debt Instrument [Line Items]
Long-term debt	$ 1,232	$ 1,482

Long-term Debt - Interest Rates

Long-term Debt - Interest Rates (Details)	Dec. 31, 2017
Bank of America Corporation | Fixed, with a weighted-average rate of 4.25%, ranging from 0.39% to 8.40%, due 2017 to 2046 | Senior notes
Debt Instrument [Line Items]
Long-term debt, weighted average interest rate	3.64%
Bank of America Corporation | Floating, with a weighted-average rate of 1.73%, ranging from 0.19% to 5.64%, due 2017 to 2044 | Senior notes
Debt Instrument [Line Items]
Long-term debt, weighted average interest rate	1.54%
Bank of America Corporation | Fixed, with a weighted-average rate of 4.87%, ranging from 2.40% to 8.57%, due 2017 to 2045 | Subordinated notes
Debt Instrument [Line Items]
Long-term debt, weighted average interest rate	4.90%
Bank of America Corporation | Floating, with a weighted-average rate of 0.83%, ranging from 0.23% to 2.52%, due 2017 to 2026 | Subordinated notes
Debt Instrument [Line Items]
Long-term debt, weighted average interest rate	1.00%
Bank of America Corporation | Fixed, with a weighted-average rate of 6.91%, ranging from 5.25% to 8.05%, due 2027 to 2067 | Junior subordinated notes (related to trust preferred securities)
Debt Instrument [Line Items]
Long-term debt, weighted average interest rate	6.91%
Bank of America Corporation | Floating, with a weighted-average rate of 1.60%, ranging from 1.43% to 1.99%, due 2027 to 2056 | Junior subordinated notes (related to trust preferred securities)
Debt Instrument [Line Items]
Long-term debt, weighted average interest rate	2.13%
Bank of America, N.A. | Subsidiaries | Fixed, with a weighted-average rate of 1.67%, ranging from 0.02% to 2.05%, due 2017 to 2018 | Senior notes
Debt Instrument [Line Items]
Long-term debt, weighted average interest rate	1.78%
Bank of America, N.A. | Subsidiaries | Floating, with a weighted-average rate of 1.66%, ranging from 0.94% to 2.86%, due 2017 to 2041 | Senior notes
Debt Instrument [Line Items]
Long-term debt, weighted average interest rate	2.60%
Bank of America, N.A. | Subsidiaries | Fixed, with a weighted-average rate of 5.66%, ranging from 5.30% to 6.10%, due 2017 to 2036 | Subordinated notes
Debt Instrument [Line Items]
Per annum interest rate of the notes	6.00%
Bank of America, N.A. | Subsidiaries | Floating, with a weighted-average rate of 1.26%, ranging from 0.85% to 1.26%, due 2017 to 2019 | Subordinated notes
Debt Instrument [Line Items]
Per annum interest rate of the notes	1.33%
Bank of America, N.A. | Subsidiaries | Fixed, with a weighted-average rate of 5.31%, ranging from 0.01% to 7.72%, due 2017 to 2034 | Advances from Federal Home Loan Banks
Debt Instrument [Line Items]
Long-term debt, weighted average interest rate	5.22%
Bank of America, N.A. | Subsidiaries | Floating, with a weighted-average rate of 1.42%, ranging from 1.35% to 1.60%, due 2018 to 2019 | Advances from Federal Home Loan Banks
Debt Instrument [Line Items]
Long-term debt, weighted average interest rate	1.42%
Minimum | Bank of America Corporation | Fixed, with a weighted-average rate of 4.25%, ranging from 0.39% to 8.40%, due 2017 to 2046 | Senior notes
Debt Instrument [Line Items]
Per annum interest rate of the notes	0.39%
Minimum | Bank of America Corporation | Floating, with a weighted-average rate of 1.73%, ranging from 0.19% to 5.64%, due 2017 to 2044 | Senior notes
Debt Instrument [Line Items]
Percentage bearing variable interest, percentage rate	0.04%
Minimum | Bank of America Corporation | Fixed, with a weighted-average rate of 4.87%, ranging from 2.40% to 8.57%, due 2017 to 2045 | Subordinated notes
Debt Instrument [Line Items]
Per annum interest rate of the notes	2.94%
Minimum | Bank of America Corporation | Floating, with a weighted-average rate of 0.83%, ranging from 0.23% to 2.52%, due 2017 to 2026 | Subordinated notes
Debt Instrument [Line Items]
Percentage bearing variable interest, percentage rate	0.20%
Minimum | Bank of America Corporation | Fixed, with a weighted-average rate of 6.91%, ranging from 5.25% to 8.05%, due 2027 to 2067 | Junior subordinated notes (related to trust preferred securities)
Debt Instrument [Line Items]
Per annum interest rate of the notes	5.25%
Minimum | Bank of America Corporation | Floating, with a weighted-average rate of 1.60%, ranging from 1.43% to 1.99%, due 2027 to 2056 | Junior subordinated notes (related to trust preferred securities)
Debt Instrument [Line Items]
Percentage bearing variable interest, percentage rate	1.91%
Minimum | Bank of America, N.A. | Subsidiaries | Fixed, with a weighted-average rate of 1.67%, ranging from 0.02% to 2.05%, due 2017 to 2018 | Senior notes
Debt Instrument [Line Items]
Per annum interest rate of the notes	0.02%
Minimum | Bank of America, N.A. | Subsidiaries | Floating, with a weighted-average rate of 1.66%, ranging from 0.94% to 2.86%, due 2017 to 2041 | Senior notes
Debt Instrument [Line Items]
Percentage bearing variable interest, percentage rate	1.44%
Minimum | Bank of America, N.A. | Subsidiaries | Fixed, with a weighted-average rate of 5.31%, ranging from 0.01% to 7.72%, due 2017 to 2034 | Advances from Federal Home Loan Banks
Debt Instrument [Line Items]
Per annum interest rate of the notes	0.01%
Minimum | Bank of America, N.A. | Subsidiaries | Floating, with a weighted-average rate of 1.42%, ranging from 1.35% to 1.60%, due 2018 to 2019 | Advances from Federal Home Loan Banks
Debt Instrument [Line Items]
Per annum interest rate of the notes	1.35%
Maximum | Bank of America Corporation | Fixed, with a weighted-average rate of 4.25%, ranging from 0.39% to 8.40%, due 2017 to 2046 | Senior notes
Debt Instrument [Line Items]
Per annum interest rate of the notes	8.40%
Maximum | Bank of America Corporation | Floating, with a weighted-average rate of 1.73%, ranging from 0.19% to 5.64%, due 2017 to 2044 | Senior notes
Debt Instrument [Line Items]
Percentage bearing variable interest, percentage rate	6.13%
Maximum | Bank of America Corporation | Fixed, with a weighted-average rate of 4.87%, ranging from 2.40% to 8.57%, due 2017 to 2045 | Subordinated notes
Debt Instrument [Line Items]
Per annum interest rate of the notes	8.57%
Maximum | Bank of America Corporation | Floating, with a weighted-average rate of 0.83%, ranging from 0.23% to 2.52%, due 2017 to 2026 | Subordinated notes
Debt Instrument [Line Items]
Percentage bearing variable interest, percentage rate	2.56%
Maximum | Bank of America Corporation | Fixed, with a weighted-average rate of 6.91%, ranging from 5.25% to 8.05%, due 2027 to 2067 | Junior subordinated notes (related to trust preferred securities)
Debt Instrument [Line Items]
Per annum interest rate of the notes	8.05%
Maximum | Bank of America Corporation | Floating, with a weighted-average rate of 1.60%, ranging from 1.43% to 1.99%, due 2027 to 2056 | Junior subordinated notes (related to trust preferred securities)
Debt Instrument [Line Items]
Percentage bearing variable interest, percentage rate	2.60%
Maximum | Bank of America, N.A. | Subsidiaries | Fixed, with a weighted-average rate of 1.67%, ranging from 0.02% to 2.05%, due 2017 to 2018 | Senior notes
Debt Instrument [Line Items]
Per annum interest rate of the notes	2.05%
Maximum | Bank of America, N.A. | Subsidiaries | Floating, with a weighted-average rate of 1.66%, ranging from 0.94% to 2.86%, due 2017 to 2041 | Senior notes
Debt Instrument [Line Items]
Percentage bearing variable interest, percentage rate	2.80%
Maximum | Bank of America, N.A. | Subsidiaries | Fixed, with a weighted-average rate of 5.31%, ranging from 0.01% to 7.72%, due 2017 to 2034 | Advances from Federal Home Loan Banks
Debt Instrument [Line Items]
Per annum interest rate of the notes	7.72%
Maximum | Bank of America, N.A. | Subsidiaries | Floating, with a weighted-average rate of 1.42%, ranging from 1.35% to 1.60%, due 2018 to 2019 | Advances from Federal Home Loan Banks
Debt Instrument [Line Items]
Per annum interest rate of the notes	1.60%

Long-term Debt - Narrative (Det

Long-term Debt - Narrative (Details) - USD ($) $ in Millions	1 Months Ended	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Long-term debt	$ 227,402	$ 227,402	$ 216,823
Repayments of long-term debt, net of adjustments		48,800	51,600
Long-term debt exchanged for senior notes	11,000
Bank of America Corporation
Debt Instrument [Line Items]
Long-term debt	185,953	185,953	173,375
Repayments of long-term debt, net of adjustments		29,100	30,600
Subsidiaries
Debt Instrument [Line Items]
Long-term debt	19,831	19,831	16,697
Repayments of long-term debt, net of adjustments		6,400	9,400
Subsidiaries | Bank of America, N.A.
Debt Instrument [Line Items]
Long-term debt	21,618	21,618	26,751
Repayments of long-term debt, net of adjustments		13,300	11,600
Consolidated VIEs
Debt Instrument [Line Items]
Long-term debt	$ 9,873	$ 9,873	$ 10,646
Long Term Debt, Excluding Senior Structured Notes
Debt Instrument [Line Items]
Long-term debt, weighted average interest rate	3.44%	3.44%	3.80%
Fixed Rate Debt
Debt Instrument [Line Items]
Long-term debt, weighted average interest rate	3.87%	3.87%	4.36%
Floating Rate Debt
Debt Instrument [Line Items]
Long-term debt, weighted average interest rate	1.49%	1.49%	1.52%
Financial Guarantee
Debt Instrument [Line Items]
Debt outstanding, unconditionally guaranteed	$ 2,700	$ 2,700
Credit Card Receivable | Consolidated VIEs
Debt Instrument [Line Items]
Long-term debt	8,598	8,598	$ 9,049
Home equity lines of credit | Consolidated VIEs
Debt Instrument [Line Items]
Long-term debt	76	76	108
Other Variable Interest Entities and Resecuritization Trusts | Consolidated VIEs
Debt Instrument [Line Items]
Long-term debt	1,200	1,200
Foreign Currency - Dominated Debt
Debt Instrument [Line Items]
Long-term debt	$ 51,800	$ 51,800	$ 44,700

Long-term Debt - Long-term Debt

Long-term Debt - Long-term Debt by Maturity (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Long-term Debt, Fiscal Year Maturity [Abstract]
2,018	$ 42,057
2,019	25,946
2,020	16,199
2,021	17,880
2,022	12,999
Thereafter	112,321
Total	227,402	$ 216,823
Bank of America Corporation
Long-term Debt, Fiscal Year Maturity [Abstract]
2,018	25,299
2,019	18,153
2,020	11,530
2,021	17,008
2,022	12,184
Thereafter	101,779
Total	185,953	173,375
Bank of America Corporation | Senior notes
Long-term Debt, Fiscal Year Maturity [Abstract]
2,018	19,577
2,019	15,115
2,020	10,580
2,021	16,196
2,022	9,691
Thereafter	69,437
Total	140,596
Bank of America Corporation | Senior structured notes
Long-term Debt, Fiscal Year Maturity [Abstract]
2,018	2,749
2,019	1,486
2,020	950
2,021	437
2,022	2,017
Thereafter	7,821
Total	15,460	17,049
Bank of America Corporation | Subordinated notes
Long-term Debt, Fiscal Year Maturity [Abstract]
2,018	2,973
2,019	1,552
2,020	0
2,021	375
2,022	476
Thereafter	20,686
Total	26,062
Bank of America Corporation | Junior subordinated notes
Long-term Debt, Fiscal Year Maturity [Abstract]
2,018	0
2,019	0
2,020	0
2,021	0
2,022	0
Thereafter	3,835
Total	3,835
Subsidiaries
Long-term Debt, Fiscal Year Maturity [Abstract]
2,018	5,699
2,019	2,385
2,020	1,545
2,021	870
2,022	803
Thereafter	8,529
Total	19,831	16,697
Subsidiaries | Structured liabilities
Long-term Debt, Fiscal Year Maturity [Abstract]
2,018	5,677
2,019	2,340
2,020	1,545
2,021	870
2,022	803
Thereafter	7,339
Total	18,574	15,171
Subsidiaries | Non-core/non-bank VIEs
Long-term Debt, Fiscal Year Maturity [Abstract]
2,018	22
2,019	45
2,020	0
2,021	0
2,022	0
Thereafter	1,165
Total	1,232
Subsidiaries | Other
Long-term Debt, Fiscal Year Maturity [Abstract]
2,018	0
2,019	0
2,020	0
2,021	0
2,022	0
Thereafter	25
Total	25	44
Subsidiaries | Bank of America, N.A.
Long-term Debt, Fiscal Year Maturity [Abstract]
2,018	11,059
2,019	5,408
2,020	3,124
2,021	2
2,022	12
Thereafter	2,013
Total	21,618	26,751
Subsidiaries | Bank of America, N.A. | Senior notes
Long-term Debt, Fiscal Year Maturity [Abstract]
2,018	5,699
2,019	0
2,020	0
2,021	0
2,022	0
Thereafter	20
Total	5,719
Subsidiaries | Bank of America, N.A. | Subordinated notes
Long-term Debt, Fiscal Year Maturity [Abstract]
2,018	0
2,019	1
2,020	0
2,021	0
2,022	0
Thereafter	1,679
Total	1,680
Subsidiaries | Bank of America, N.A. | Advances from Federal Home Loan Banks
Long-term Debt, Fiscal Year Maturity [Abstract]
2,018	3,009
2,019	2,013
2,020	11
2,021	2
2,022	3
Thereafter	108
Total	5,146
Subsidiaries | Bank of America, N.A. | Securitizations and other BANA VIEs
Long-term Debt, Fiscal Year Maturity [Abstract]
2,018	2,300
2,019	3,200
2,020	3,098
2,021	0
2,022	0
Thereafter	43
Total	8,641	9,164
Subsidiaries | Bank of America, N.A. | Other
Long-term Debt, Fiscal Year Maturity [Abstract]
2,018	51
2,019	194
2,020	15
2,021	0
2,022	9
Thereafter	163
Total	$ 432	$ 3,084

Long-term Debt - Trust Preferre

Long-term Debt - Trust Preferred and Hybrid Securities (Details)	12 Months Ended
	Dec. 31, 2017
Junior subordinated notes (related to trust preferred securities)
Debt Instrument [Line Items]
Interest payment deferral period (not to exceed)	5 years

Long-term Debt - Trust Securiti

Long-term Debt - Trust Securities Summary (Details) $ in Millions	12 Months Ended
	Dec. 31, 2017USD ($)
Junior subordinated notes
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Aggregate Principal Amount of the Notes	$ 4,772
Junior subordinated notes | Capital Trust VI
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Aggregate Principal Amount of the Notes	$ 27
Per Annum Interest Rate of the Notes	5.63%
Junior subordinated notes | Capital Trust VII
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Aggregate Principal Amount of the Notes	$ 6
Per Annum Interest Rate of the Notes	5.25%
Junior subordinated notes | Capital Trust XI
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Aggregate Principal Amount of the Notes	$ 678
Per Annum Interest Rate of the Notes	6.63%
Junior subordinated notes | Capital Trust XV
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Aggregate Principal Amount of the Notes	$ 1
Junior subordinated notes | Capital Trust III
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Aggregate Principal Amount of the Notes	135
Junior subordinated notes | Capital III
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Aggregate Principal Amount of the Notes	105
Junior subordinated notes | Capital Trust V
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Aggregate Principal Amount of the Notes	82
Junior subordinated notes | Capital Trust III
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Aggregate Principal Amount of the Notes	55
Junior subordinated notes | Capital Trust IV
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Aggregate Principal Amount of the Notes	106
Junior subordinated notes | Capital Trust B
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Aggregate Principal Amount of the Notes	73
Junior subordinated notes | Capital III
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Aggregate Principal Amount of the Notes	$ 206
Per Annum Interest Rate of the Notes	8.05%
Junior subordinated notes | Capital V
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Aggregate Principal Amount of the Notes	$ 1,496
Per Annum Interest Rate of the Notes	7.00%
Junior subordinated notes | Capital Trust I
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Aggregate Principal Amount of the Notes	$ 1,051
Per Annum Interest Rate of the Notes	6.45%
Junior subordinated notes | Capital Trust III
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Aggregate Principal Amount of the Notes	$ 751
Per Annum Interest Rate of the Notes	7.375%
Junior subordinated notes | 3-Month London Interbank Offered Rate (LIBOR) | Capital Trust XV
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Basis spread on variable rate	0.80%
Junior subordinated notes | 3-Month London Interbank Offered Rate (LIBOR) | Capital Trust III
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Basis spread on variable rate	0.55%
Junior subordinated notes | 3-Month London Interbank Offered Rate (LIBOR) | Capital III
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Basis spread on variable rate	0.57%
Junior subordinated notes | 3-Month London Interbank Offered Rate (LIBOR) | Capital Trust V
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Basis spread on variable rate	1.00%
Junior subordinated notes | 3-Month London Interbank Offered Rate (LIBOR) | Capital Trust III
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Basis spread on variable rate	0.75%
Junior subordinated notes | 3-Month London Interbank Offered Rate (LIBOR) | Capital Trust IV
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Basis spread on variable rate	0.60%
Junior subordinated notes | 3-Month London Interbank Offered Rate (LIBOR) | Capital Trust B
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Basis spread on variable rate	0.80%
Trust Preferred Securities Subject to Mandatory Redemption
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Aggregate Principal Amount of Trust Securities	$ 4,725
Capital Trust VI | Trust Preferred Securities Subject to Mandatory Redemption
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Aggregate Principal Amount of Trust Securities	27
Capital Trust VII | Trust Preferred Securities Subject to Mandatory Redemption
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Aggregate Principal Amount of Trust Securities	6
Capital Trust XI | Trust Preferred Securities Subject to Mandatory Redemption
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Aggregate Principal Amount of Trust Securities	658
Capital Trust XV | Trust Preferred Securities Subject to Mandatory Redemption
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Aggregate Principal Amount of Trust Securities	1
Capital Trust III | Trust Preferred Securities Subject to Mandatory Redemption
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Aggregate Principal Amount of Trust Securities	131
Capital III | Trust Preferred Securities Subject to Mandatory Redemption
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Aggregate Principal Amount of Trust Securities	103
Capital Trust V | Trust Preferred Securities Subject to Mandatory Redemption
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Aggregate Principal Amount of Trust Securities	79
Capital Trust III | Trust Preferred Securities Subject to Mandatory Redemption
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Aggregate Principal Amount of Trust Securities	53
Capital Trust IV | Trust Preferred Securities Subject to Mandatory Redemption
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Aggregate Principal Amount of Trust Securities	102
Capital Trust B | Trust Preferred Securities Subject to Mandatory Redemption
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Aggregate Principal Amount of Trust Securities	70
Capital III | Trust Preferred Securities Subject to Mandatory Redemption
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Aggregate Principal Amount of Trust Securities	200
Capital V | Trust Preferred Securities Subject to Mandatory Redemption
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Aggregate Principal Amount of Trust Securities	1,495
Capital Trust I | Trust Preferred Securities Subject to Mandatory Redemption
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Aggregate Principal Amount of Trust Securities	1,050
Capital Trust III | Trust Preferred Securities Subject to Mandatory Redemption
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Aggregate Principal Amount of Trust Securities	$ 750

Commitments and Contingencies -

Commitments and Contingencies - Credit Extension Commitments Narrative (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Commitments and Contingencies Disclosure [Abstract]
Legally binding unfunded commitments syndicated	$ 11,000	$ 12,100
Carrying amount credit extension commitments syndicated	793	779
Deferred revenue	16	17
Other liabilities reserve for unfunded lending commitments	777	762
Notional amount of credit extension commitments under fair value option	4,800	7,000
Unfunded loan commitments
Other Commitments [Line Items]
Fair value carrying amount liabilities	$ 120	$ 173

Commitments and Contingencie132

Commitments and Contingencies - Credit Extension Commitments (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Other Commitments [Line Items]
Expire in One Year or Less	$ 475,273	$ 489,638
Expire After One Year Through Three Years	156,777	154,621
Expire After Three Years Through Five Years	152,880	158,837
Expire After Five Years	53,823	48,259
Total	838,753	851,355
Legally binding commitments
Other Commitments [Line Items]
Expire in One Year or Less	113,243	111,865
Expire After One Year Through Three Years	156,777	154,621
Expire After Three Years Through Five Years	152,880	158,837
Expire After Five Years	53,823	48,259
Total	476,723	473,582
Loan commitments
Other Commitments [Line Items]
Expire in One Year or Less	85,804	82,609
Expire After One Year Through Three Years	140,942	133,063
Expire After Three Years Through Five Years	147,043	152,854
Expire After Five Years	21,342	22,129
Total	395,131	390,655
Home equity lines of credit
Other Commitments [Line Items]
Expire in One Year or Less	6,172	8,806
Expire After One Year Through Three Years	4,457	10,701
Expire After Three Years Through Five Years	2,288	2,644
Expire After Five Years	31,250	25,050
Total	44,167	47,201
Standby letters of credit and other
Other Commitments [Line Items]
Expire in One Year or Less	19,976	19,165
Expire After One Year Through Three Years	11,261	10,754
Expire After Three Years Through Five Years	3,420	3,225
Expire After Five Years	1,144	1,027
Total	35,801	34,171
Standby letters of credit and other | Credit Card and Other Consumer
Other Commitments [Line Items]
Total	421	376
Standby letters of credit and other | Investment grade
Other Commitments [Line Items]
Total	27,300	25,500
Standby letters of credit and other | Non-investment grade
Other Commitments [Line Items]
Total	8,100	8,300
Letters of credit
Other Commitments [Line Items]
Expire in One Year or Less	1,291	1,285
Expire After One Year Through Three Years	117	103
Expire After Three Years Through Five Years	129	114
Expire After Five Years	87	53
Total	1,624	1,555
Credit card lines
Other Commitments [Line Items]
Expire in One Year or Less	362,030	377,773
Expire After One Year Through Three Years	0	0
Expire After Three Years Through Five Years	0	0
Expire After Five Years	0	0
Total	$ 362,030	$ 377,773

Commitments and Contingencie133

Commitments and Contingencies - Other Commitments (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Operating Leases, Future Minimum Payments Receivable [Abstract]
2,018	$ 2,300
2,019	2,100
2,020	1,900
2,021	1,700
2,022	1,400
Thereafter	5,100
Liquefied Natural Gas Commodities
Loss Contingencies [Line Items]
Other commitments	1,500	$ 1,900
Forward-Dated Resale and Securities Borrowing Agreements
Loss Contingencies [Line Items]
Other commitments	56,800	48,900
Forward-Dated Repurchase and Securities Lending Agreements
Loss Contingencies [Line Items]
Other commitments	34,300	24,400
Retail Automotive Loans
Loss Contingencies [Line Items]
Other commitments	345	475
Auto Loans and Leases
Operating Leases, Future Minimum Payments Receivable [Abstract]
Other commitment, due next year	3,000
Residential and Commercial Portfolio Segments | Residential and Commercial Financing Receivable | Loan Purchase Commitments
Loss Contingencies [Line Items]
Other commitments	344	767
Commercial Portfolio Segment | Loan Purchase Commitments
Loss Contingencies [Line Items]
Other commitments	$ 994	$ 636

Commitments and Contingencie134

Commitments and Contingencies - Other Guarantees (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Merchant Servicing Joint Venture
Loss Contingencies [Line Items]
Equity method investment ownership percentage	49.00%
Carrying value of investment	$ 2,900	$ 2,900
Merchant Processing Servicers, Sponsored Entities
Loss Contingencies [Line Items]
Transactions processed and settled by sponsored entities	812,200	731,400
Losses as result of cardholder disputed transactions	28	33
Life Insurance Book Value Protection
Loss Contingencies [Line Items]
Notional amount of derivatives	10,400	13,900
Maximum potential exposure	1,600	3,200
Net fair value of bank-owned life insurance book value protection	3	4
Merchant Services | Merchant Processing Servicers, Sponsored Entities
Loss Contingencies [Line Items]
Maximum potential exposure	346,400	325,700
Other Guarantee
Loss Contingencies [Line Items]
Maximum potential exposure	$ 5,900	$ 6,700

Commitments and Contingencie135

Commitments and Contingencies - Litigation and Regulatory Matters (Details)	Apr. 07, 2017USD ($)	Jan. 09, 2017USD ($)	Oct. 01, 2015USD ($)	Dec. 30, 2014USD ($)	Sep. 02, 2014trustsummon	Oct. 19, 2012USD ($)	Sep. 29, 2010USD ($)	Mar. 11, 2015trust	Dec. 31, 2017USD ($)lawsuit	Dec. 31, 2016USD ($)
Commitments and Contingencies Disclosure [Abstract]
Litigation settlement expense									$ 753,000,000	$ 1,200,000,000
Minimum
Loss Contingencies [Line Items]
Estimated range of possible loss									0
Maximum
Loss Contingencies [Line Items]
Estimated range of possible loss									$ 1,300,000,000
Ambac Bond Insurance Litigation
Loss Contingencies [Line Items]
Number of filed lawsuits | lawsuit									5
Ambac Countrywide Litigation, Claim 1
Loss Contingencies [Line Items]
Damages sought							$ 2,200,000,000
Ambac Countrywide Litigation, Claim 2
Loss Contingencies [Line Items]
Damages sought				$ 600,000,000
Ambac Countrywide Litigation, Claim 3
Loss Contingencies [Line Items]
Damages sought				$ 350,000,000
FDIC Deposit Insurance Assessments | Bank of America, N.A.
Loss Contingencies [Line Items]
Damages sought	$ 583,000,000	$ 542,000,000
In Re Payment Card Interchange Fee and Merchant Discount Anti-Trust Litigation (Interchange)
Loss Contingencies [Line Items]
Litigation settlement amount, total for group of defendants						$ 6,600,000,000
Percentage of default						10.00%
U.S. Dollar LIBOR Contributions Litigation
Loss Contingencies [Line Items]
Litigation settlement amount, total for group of defendants			$ 187,500,000
U.S. Bank Summonses with Notice Litigation
Loss Contingencies [Line Items]
Number of trusts involved in settlement agreement | trust					7
New claims filed | summon					7
Number of complaints served on trusts involved in settlement agreement | trust								4

Shareholders' Equity - Declared

Shareholders' Equity - Declared Quarterly Cash Dividends on Common Stock (Details) - $ / shares	Jan. 31, 2018	Oct. 25, 2017	Jul. 26, 2017	Apr. 26, 2017	Jan. 26, 2017	Mar. 31, 2018	Dec. 31, 2017
Subsequent Event [Line Items]
Dividends per share (in dollars per share)		$ 0.12	$ 0.12	$ 0.075	$ 0.075		$ 0.39000000
Subsequent Event
Subsequent Event [Line Items]
Dividends per share (in dollars per share)	$ 0.120					$ 0.12

Shareholders' Equity - Common S

Shareholders' Equity - Common Stock Repurchase Summary (Details) - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Class of Stock [Line Items]
Total purchase price of shares repurchased and retired	$ 12,814	$ 5,112	$ 2,374
Common Stock
Class of Stock [Line Items]
Total purchase price of shares repurchased and retired	$ 12,814	$ 5,112	$ 2,374
Common Stock | CCAR capital plan repurchases
Class of Stock [Line Items]
Total number of shares repurchased and retired (in shares)	509	333	140
Total purchase price of shares repurchased and retired	$ 9,347	$ 4,312	$ 2,374
Common Stock | Other authorized repurchases
Class of Stock [Line Items]
Total purchase price of shares repurchased and retired	$ 3,467	$ 800	$ 0

Shareholders' Equity - Commo138

Shareholders' Equity - Common Stock Narrative (Details) - USD ($)	Jan. 31, 2018	Oct. 25, 2017	Aug. 24, 2017	Jul. 26, 2017	Apr. 26, 2017	Jan. 26, 2017	Mar. 31, 2018	Sep. 30, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 05, 2017	Jun. 28, 2017	Jan. 13, 2017
Common Stock
Stock repurchase program, authorized amount												$ 5,000,000,000
Common stock dividends declared (in dollars per share)		$ 0.12		$ 0.12	$ 0.075	$ 0.075			$ 0.39000000
Common stock repurchased									$ 12,814,000,000	$ 5,112,000,000	$ 2,374,000,000
Share-based compensation, number of shares authorized (in shares)									869,000,000
Subsequent Event
Common Stock
Common stock dividends declared (in dollars per share)	$ 0.120						$ 0.12
Series T Preferred Stock
Common Stock
Per annum dividend rate			6.00%						6.00%
Carrying amount of stock			$ 2,900,000,000
Common Stock
Common Stock
Common stock repurchased									$ 12,814,000,000	5,112,000,000	2,374,000,000
Common stock issued in connection with exercise of warrants and exchange of preferred stock (in shares)			700,000,000					700,000,000
Stock issued (in shares)									66,000,000
Shares paid for tax withholding for share based compensation (in shares)									27,000,000
Warrants Expiring October 18, 2018
Common Stock
Warrants outstanding (in shares)									122,000,000
Minimum required dividend rate (in dollars per share)									$ 0.32
Exercise price per warrant (in dollars per share)									$ 30.79
Warrants Expiring January 16, 2019
Common Stock
Warrants outstanding (in shares)									143,000,000
Minimum required dividend rate (in dollars per share)									$ 0.01
Exercise price per warrant (in dollars per share)									$ 12.757
2017 CCAR
Common Stock
Stock repurchase program, authorized amount													$ 12,000,000,000
2017 CCAR, Equity-Based Compensation Plan Effect Offset
Common Stock
Stock repurchase program, authorized amount													$ 900,000,000
CCAR capital plan repurchases | Common Stock
Common Stock
Common stock repurchased									$ 9,347,000,000	4,312,000,000	2,374,000,000
Other authorized repurchases | Common Stock
Common Stock
Stock repurchase program, authorized amount												$ 1,700,000,000		$ 1,800,000,000
Common stock repurchased									$ 3,467,000,000	$ 800,000,000	$ 0

Shareholders' Equity - Preferre

Shareholders' Equity - Preferred Stock Summary (Details) $ / shares in Units, $ in Millions

Mar. 10, 2026

Mar. 17, 2025

Oct. 23, 2024

Sep. 05, 2024

Jun. 01, 2023

Jun. 17, 2019

May 15, 2018

Jan. 30, 2018

Aug. 24, 2017shares

Sep. 30, 2017shares

Dec. 31, 2017USD ($)$ / sharesshares

Dec. 31, 2016shares

Class of Stock [Line Items]

Total Shares Outstanding (in shares) | shares

3,837,683

3,887,329

Carrying Value | $

$ 22,622

Preferred stock adjustments | $

$ 299

Series B Preferred Stock

Class of Stock [Line Items]

Total Shares Outstanding (in shares) | shares

7,110

Liquidation Preference per Share (in dollars per share) | $ / shares

$ 100

Carrying Value | $

$ 1

Per Annum Dividend Rate

7.00%

Series D Preferred Stock

Class of Stock [Line Items]

Total Shares Outstanding (in shares) | shares

26,174

Liquidation Preference per Share (in dollars per share) | $ / shares

$ 25,000

Carrying Value | $

$ 654

Per Annum Dividend Rate

6.204%

Ownership interest in a share of preferred stock

0.10%

Series E Preferred Stock

Class of Stock [Line Items]

Total Shares Outstanding (in shares) | shares

12,691

Liquidation Preference per Share (in dollars per share) | $ / shares

$ 25,000

Carrying Value | $

$ 317

Minimum interest rate per annum

4.00%

Ownership interest in a share of preferred stock

0.10%

Series F Preferred Stock

Class of Stock [Line Items]

Total Shares Outstanding (in shares) | shares

1,409

Liquidation Preference per Share (in dollars per share) | $ / shares

$ 100,000

Carrying Value | $

$ 141

Minimum interest rate per annum

4.00%

Series G Preferred Stock

Class of Stock [Line Items]

Total Shares Outstanding (in shares) | shares

4,926

Liquidation Preference per Share (in dollars per share) | $ / shares

$ 100,000

Carrying Value | $

$ 493

Minimum interest rate per annum

4.00%

Series I Preferred Stock

Class of Stock [Line Items]

Total Shares Outstanding (in shares) | shares

14,584

Liquidation Preference per Share (in dollars per share) | $ / shares

$ 25,000

Carrying Value | $

$ 365

Per Annum Dividend Rate

6.625%

Ownership interest in a share of preferred stock

0.10%

Series K Preferred Stock

Class of Stock [Line Items]

Total Shares Outstanding (in shares) | shares

61,773

Liquidation Preference per Share (in dollars per share) | $ / shares

$ 25,000

Carrying Value | $

$ 1,544

Per Annum Dividend Rate

8.00%

Minimum interest rate per annum

4.00%

Ownership interest in a share of preferred stock

4.00%

Series L Preferred Stock

Class of Stock [Line Items]

Total Shares Outstanding (in shares) | shares

3,080,182

Liquidation Preference per Share (in dollars per share) | $ / shares

$ 1,000

Carrying Value | $

$ 3,080

Per Annum Dividend Rate

7.25%

Series M Preferred Stock

Class of Stock [Line Items]

Total Shares Outstanding (in shares) | shares

52,399

Liquidation Preference per Share (in dollars per share) | $ / shares

$ 25,000

Carrying Value | $

$ 1,310

Per Annum Dividend Rate

8.125%

Minimum interest rate per annum

4.00%

Ownership interest in a share of preferred stock

4.00%

Series T Preferred Stock

Class of Stock [Line Items]

Total Shares Outstanding (in shares) | shares

354

Liquidation Preference per Share (in dollars per share) | $ / shares

$ 100,000

Carrying Value | $

$ 35

Per Annum Dividend Rate

6.00%

6.00%

Series U Preferred Stock

Class of Stock [Line Items]

Total Shares Outstanding (in shares) | shares

40,000

Liquidation Preference per Share (in dollars per share) | $ / shares

$ 25,000

Carrying Value | $

$ 1,000

Per Annum Dividend Rate

5.20%

Minimum interest rate per annum

4.00%

Ownership interest in a share of preferred stock

4.00%

Series V Preferred Stock

Class of Stock [Line Items]

Total Shares Outstanding (in shares) | shares

60,000

Liquidation Preference per Share (in dollars per share) | $ / shares

$ 25,000

Carrying Value | $

$ 1,500

Per Annum Dividend Rate

5.125%

Minimum interest rate per annum

4.00%

Ownership interest in a share of preferred stock

4.00%

Series W Preferred Stock

Class of Stock [Line Items]

Total Shares Outstanding (in shares) | shares

44,000

Liquidation Preference per Share (in dollars per share) | $ / shares

$ 25,000

Carrying Value | $

$ 1,100

Per Annum Dividend Rate

6.625%

Ownership interest in a share of preferred stock

0.10%

Series X Preferred Stock

Class of Stock [Line Items]

Total Shares Outstanding (in shares) | shares

80,000

Liquidation Preference per Share (in dollars per share) | $ / shares

$ 25,000

Carrying Value | $

$ 2,000

Per Annum Dividend Rate

6.25%

Minimum interest rate per annum

4.00%

Ownership interest in a share of preferred stock

4.00%

Series Y Preferred Stock

Class of Stock [Line Items]

Total Shares Outstanding (in shares) | shares

44,000

Liquidation Preference per Share (in dollars per share) | $ / shares

$ 25,000

Carrying Value | $

$ 1,100

Per Annum Dividend Rate

6.50%

Ownership interest in a share of preferred stock

0.10%

Series Z Preferred Stock

Class of Stock [Line Items]

Total Shares Outstanding (in shares) | shares

56,000

Liquidation Preference per Share (in dollars per share) | $ / shares

$ 25,000

Carrying Value | $

$ 1,400

Per Annum Dividend Rate

6.50%

Minimum interest rate per annum

4.00%

Ownership interest in a share of preferred stock

4.00%

Series AA Preferred Stock

Class of Stock [Line Items]

Total Shares Outstanding (in shares) | shares

76,000

Liquidation Preference per Share (in dollars per share) | $ / shares

$ 25,000

Carrying Value | $

$ 1,900

Per Annum Dividend Rate

6.10%

Minimum interest rate per annum

4.00%

Ownership interest in a share of preferred stock

4.00%

Series CC Preferred Stock

Class of Stock [Line Items]

Total Shares Outstanding (in shares) | shares

44,000

Liquidation Preference per Share (in dollars per share) | $ / shares

$ 25,000

Carrying Value | $

$ 1,100

Per Annum Dividend Rate

6.20%

Ownership interest in a share of preferred stock

0.10%

Series DD Preferred Stock

Class of Stock [Line Items]

Total Shares Outstanding (in shares) | shares

40,000

Liquidation Preference per Share (in dollars per share) | $ / shares

$ 25,000

Carrying Value | $

$ 1,000

Per Annum Dividend Rate

6.30%

Minimum interest rate per annum

4.00%

Ownership interest in a share of preferred stock

4.00%

Series EE Preferred Stock

Class of Stock [Line Items]

Total Shares Outstanding (in shares) | shares

36,000

Liquidation Preference per Share (in dollars per share) | $ / shares

$ 25,000

Carrying Value | $

$ 900

Per Annum Dividend Rate

6.00%

Ownership interest in a share of preferred stock

0.10%

Series 1 Preferred Stock

Class of Stock [Line Items]

Total Shares Outstanding (in shares) | shares

3,275

Liquidation Preference per Share (in dollars per share) | $ / shares

$ 30,000

Carrying Value | $

$ 98

Minimum interest rate per annum

3.00%

Ownership interest in a share of preferred stock

0.08333%

Series 2 Preferred Stock

Class of Stock [Line Items]

Total Shares Outstanding (in shares) | shares

9,967

Liquidation Preference per Share (in dollars per share) | $ / shares

$ 30,000

Carrying Value | $

$ 299

Minimum interest rate per annum

3.00%

Ownership interest in a share of preferred stock

0.08333%

Series 3 Preferred Stock

Class of Stock [Line Items]

Total Shares Outstanding (in shares) | shares

21,773

Liquidation Preference per Share (in dollars per share) | $ / shares

$ 30,000

Carrying Value | $

$ 653

Per Annum Dividend Rate

6.375%

Ownership interest in a share of preferred stock

0.08333%

Series 4 Preferred Stock

Class of Stock [Line Items]

Total Shares Outstanding (in shares) | shares

7,010

Liquidation Preference per Share (in dollars per share) | $ / shares

$ 30,000

Carrying Value | $

$ 210

Minimum interest rate per annum

4.00%

Ownership interest in a share of preferred stock

0.08333%

Series 5 Preferred Stock

Class of Stock [Line Items]

Total Shares Outstanding (in shares) | shares

14,056

Liquidation Preference per Share (in dollars per share) | $ / shares

$ 30,000

Carrying Value | $

$ 422

Minimum interest rate per annum

4.00%

Ownership interest in a share of preferred stock

0.08333%

Common Stock

Class of Stock [Line Items]

Common stock issued in connection with exercise of warrants and exchange of preferred stock (in shares) | shares

700,000,000

700,000,000

3-Month London Interbank Offered Rate (LIBOR) | Series E Preferred Stock

Class of Stock [Line Items]

Basis spread on variable rate for dividend rate

0.0035

3-Month London Interbank Offered Rate (LIBOR) | Series F Preferred Stock

Class of Stock [Line Items]

Basis spread on variable rate for dividend rate

0.0040

3-Month London Interbank Offered Rate (LIBOR) | Series G Preferred Stock

Class of Stock [Line Items]

Basis spread on variable rate for dividend rate

0.0040

3-Month London Interbank Offered Rate (LIBOR) | Series 1 Preferred Stock

Class of Stock [Line Items]

Basis spread on variable rate for dividend rate

0.0075

3-Month London Interbank Offered Rate (LIBOR) | Series 2 Preferred Stock

Class of Stock [Line Items]

Basis spread on variable rate for dividend rate

0.0065

3-Month London Interbank Offered Rate (LIBOR) | Series 4 Preferred Stock

Class of Stock [Line Items]

Basis spread on variable rate for dividend rate

0.0075

3-Month London Interbank Offered Rate (LIBOR) | Series 5 Preferred Stock

Class of Stock [Line Items]

Basis spread on variable rate for dividend rate

0.0050

3-Month London Interbank Offered Rate (LIBOR) | Forecast | Series K Preferred Stock

Class of Stock [Line Items]

Basis spread on variable rate for dividend rate

0.0363

3-Month London Interbank Offered Rate (LIBOR) | Forecast | Series M Preferred Stock

Class of Stock [Line Items]

Basis spread on variable rate for dividend rate

0.0364

3-Month London Interbank Offered Rate (LIBOR) | Forecast | Series U Preferred Stock

Class of Stock [Line Items]

Basis spread on variable rate for dividend rate

0.03135

3-Month London Interbank Offered Rate (LIBOR) | Forecast | Series V Preferred Stock

Class of Stock [Line Items]

Basis spread on variable rate for dividend rate

0.03387

3-Month London Interbank Offered Rate (LIBOR) | Forecast | Series X Preferred Stock

Class of Stock [Line Items]

Basis spread on variable rate for dividend rate

0.03705

3-Month London Interbank Offered Rate (LIBOR) | Forecast | Series Z Preferred Stock

Class of Stock [Line Items]

Basis spread on variable rate for dividend rate

0.04174

3-Month London Interbank Offered Rate (LIBOR) | Forecast | Series AA Preferred Stock

Class of Stock [Line Items]

Basis spread on variable rate for dividend rate

0.03898

3-Month London Interbank Offered Rate (LIBOR) | Forecast | Series DD Preferred Stock

Class of Stock [Line Items]

Basis spread on variable rate for dividend rate

0.04553

Shareholders' Equity - Prefe140

Shareholders' Equity - Preferred Stock Narrative (Details) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2017USD ($)dquarterly_periodsemi_annual_perioddirector$ / sharesshares	Dec. 31, 2016USD ($)$ / shares	Dec. 31, 2015USD ($)
Class of Stock [Line Items]
Preferred stock dividends | $	$ 1,578	$ 1,682	$ 1,483
Preferred stock, par value (in dollars per share) | $ / shares	$ 0.01	$ 0.01
Series L Preferred Stock
Class of Stock [Line Items]
Per annum dividend rate	7.25%
Preferred stock to be convertible into common shares (in shares) | shares	20
Number of trading days | d	20
Period of consecutive trading days | d	30
Threshold percentage of common stock closing price (exceeds)	130.00%
Preferred Stock, Excluding Series B, F, G and T Preferred
Class of Stock [Line Items]
Number of semi annual periods in arrears (or more) | semi_annual_period	3
Number of quarterly periods in arrears (or more) | quarterly_period	6
Number of additional directors to be elected | director	2
Number of semi annual periods for termination (or more) | semi_annual_period	2
Number of quarterly periods for termination (or more) | quarterly_period	4
Retained Earnings
Class of Stock [Line Items]
Preferred stock dividends | $	$ 1,578	$ 1,682	$ 1,483

Shareholders' Equity - Accounti

Shareholders' Equity - Accounting for Share-based Compensation (Details) $ in Millions	12 Months Ended
	Dec. 31, 2017USD ($)
Equity [Abstract]
Share-based payment award tax benefit	$ (236)

Accumulated Other Comprehens142

Accumulated Other Comprehensive Income (Loss) - Change in Accumulated OCI (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance	$ 266,195	$ 255,615	$ 243,476
Net change	206	(1,930)	(110)
Ending Balance	267,146	266,195	255,615
Debit Valuation Adjustments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance	(767)	(611)
Cumulative adjustment for accounting change				$ (1,226)
Net change	(293)	(156)	615
Ending Balance	(1,060)	(767)	(611)
Derivatives
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance	(895)	(1,077)	(1,661)
Net change	64	182	584
Ending Balance	(831)	(895)	(1,077)
Employee Benefit Plans
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance	(3,480)	(2,956)	(3,350)
Net change	288	(524)	394
Ending Balance	(3,192)	(3,480)	(2,956)
Foreign currency
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance	(879)	(792)	(669)
Net change	86	(87)	(123)
Ending Balance	(793)	(879)	(792)
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance	(7,288)	(5,358)	(4,022)
Cumulative adjustment for accounting change				$ (1,226)
Net change	206	(1,930)	(110)
Ending Balance	(7,082)	(7,288)	(5,358)
Debt securities | Available-for-sale securities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance	(1,299)	16	1,641
Net change	91	(1,315)	(1,625)
Ending Balance	(1,208)	(1,299)	16
Equity securities | Available-for-sale securities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance	32	62	17
Net change	(30)	(30)	45
Ending Balance	$ 2	$ 32	$ 62

Accumulated Other Comprehens143

Accumulated Other Comprehensive Income (Loss) - Changes in OCI Components Before- and After-tax (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
After-tax
Comprehensive income	$ 18,438	$ 15,892	$ 15,800
Total other comprehensive income (loss)
Before-tax
Net change	(1,023)	(2,428)	521
Tax effect
Net change	1,229	498	(631)
After-tax
Comprehensive income	206	(1,930)	(110)
Available-for-sale securities | Debt securities
Before-tax
Net increase (decrease) in fair value	202	(1,645)	(1,564)
Net realized (gains) losses reclassified into earnings	(214)	(471)	(1,057)
Net change	(12)	(2,116)	(2,621)
Tax effect
Net increase (decrease) in fair value	26	622	595
Net realized (gains) losses reclassified into earnings	77	179	401
Net change	103	801	996
After-tax
Other comprehensive income (loss) before reclassification, net of tax	228	(1,023)	(969)
Net realized (gains) losses reclassified into earnings	(137)	(292)	(656)
Comprehensive income	91	(1,315)	(1,625)
Available-for-sale securities | Debt securities | Gains on sales of debt securities
Before-tax
Net realized (gains) losses reclassified into earnings	(255)	(490)	(1,138)
Tax effect
Net realized (gains) losses reclassified into earnings	97	186	432
After-tax
Net realized (gains) losses reclassified into earnings	(158)	(304)	(706)
Available-for-sale securities | Debt securities | Other income
Before-tax
Net realized (gains) losses reclassified into earnings	41	19	81
Tax effect
Net realized (gains) losses reclassified into earnings	(20)	(7)	(31)
After-tax
Net realized (gains) losses reclassified into earnings	21	12	50
Available-for-sale securities | Equity securities
Before-tax
Net increase (decrease) in fair value	38	(49)	72
Net realized (gains) losses reclassified into earnings	(90)	0	0
Net change	(52)	(49)	72
Tax effect
Net increase (decrease) in fair value	(12)	19	(27)
Net realized (gains) losses reclassified into earnings	34	0	0
Net change	22	19	(27)
After-tax
Other comprehensive income (loss) before reclassification, net of tax	26	(30)	45
Net realized (gains) losses reclassified into earnings	(56)	0	0
Comprehensive income	(30)	(30)	45
Debit Valuation Adjustments
Before-tax
Net increase (decrease) in fair value	(490)	(271)	436
Net realized (gains) losses reclassified into earnings	42	17	556
Net change	(448)	(254)	992
Tax effect
Net increase (decrease) in fair value	171	104	(166)
Net realized (gains) losses reclassified into earnings	(16)	(6)	(211)
Net change	155	98	(377)
After-tax
Other comprehensive income (loss) before reclassification, net of tax	(319)	(167)	270
Net realized (gains) losses reclassified into earnings	26	11	345
Comprehensive income	(293)	(156)	615
Derivatives
Before-tax
Net increase (decrease) in fair value	(50)	(299)	55
Net realized (gains) losses reclassified into earnings	179	585	883
Net change	129	286	938
Tax effect
Net increase (decrease) in fair value	1	113	(22)
Net realized (gains) losses reclassified into earnings	(66)	(217)	(332)
Net change	(65)	(104)	(354)
After-tax
Other comprehensive income (loss) before reclassification, net of tax	(49)	(186)	33
Net realized (gains) losses reclassified into earnings	113	368	551
Comprehensive income	64	182	584
Derivatives | Net interest income
Before-tax
Net realized (gains) losses reclassified into earnings	327	553	974
Tax effect
Net realized (gains) losses reclassified into earnings	(122)	(205)	(367)
After-tax
Net realized (gains) losses reclassified into earnings	205	348	607
Derivatives | Personnel
Before-tax
Net realized (gains) losses reclassified into earnings	(148)	32	(91)
Tax effect
Net realized (gains) losses reclassified into earnings	56	(12)	35
After-tax
Net realized (gains) losses reclassified into earnings	(92)	20	(56)
Employee Benefit Plans
Before-tax
Net increase (decrease) in fair value	223	(921)	408
Net realized (gains) losses reclassified into earnings	179	97	169
Settlements, curtailments and other	3	15	1
Net change	405	(809)	578
Tax effect
Net increase (decrease) in fair value	(55)	329	(121)
Net realized (gains) losses reclassified into earnings	(61)	(36)	(62)
Settlements, curtailments and other	(1)	(8)	(1)
Net change	(117)	285	(184)
After-tax
Other comprehensive income (loss) before reclassification, net of tax	168	(592)	287
Net realized (gains) losses reclassified into earnings	118	61	107
Settlements, curtailments and other	2	7	0
Comprehensive income	288	(524)	394
Prior service cost
Before-tax
Net realized (gains) losses reclassified into earnings	4	5	5
Tax effect
Net realized (gains) losses reclassified into earnings	(1)	(2)	(2)
After-tax
Net realized (gains) losses reclassified into earnings	3	3	3
Net actuarial losses
Before-tax
Net realized (gains) losses reclassified into earnings	175	92	164
Tax effect
Net realized (gains) losses reclassified into earnings	(60)	(34)	(60)
After-tax
Net realized (gains) losses reclassified into earnings	115	58	104
Foreign currency
Before-tax
Net increase (decrease) in fair value	(439)	514	600
Net realized (gains) losses reclassified into earnings	(606)	0	(38)
Net change	(1,045)	514	562
Tax effect
Net increase (decrease) in fair value	430	(601)	(723)
Net realized (gains) losses reclassified into earnings	701	0	38
Net change	1,131	(601)	(685)
After-tax
Other comprehensive income (loss) before reclassification, net of tax	(9)	(87)	(123)
Net realized (gains) losses reclassified into earnings	95	0	0
Comprehensive income	$ 86	$ (87)	$ (123)

Earnings Per Common Share - Bas

Earnings Per Common Share - Basic and Diluted (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Earnings per common share
Net income	$ 18,232	$ 17,822	$ 15,910
Preferred stock dividends	(1,614)	(1,682)	(1,483)
Net income applicable to common shareholders	$ 16,618	$ 16,140	$ 14,427
Average common shares issued and outstanding (in shares)	10,195,646	10,284,147	10,462,282
Earnings per common share (in dollars per share)	$ 1.63	$ 1.57	$ 1.38
Diluted earnings per common share
Net income applicable to common shareholders	$ 16,618	$ 16,140	$ 14,427
Add preferred stock dividends due to assumed conversions	186	300	300
Net income allocated to common shareholders	$ 16,804	$ 16,440	$ 14,727
Average common shares issued and outstanding (in thousands) (in shares)	10,195,646	10,284,147	10,462,282
Dilutive potential common shares (in shares)	582,782	762,659	773,948
Total diluted average common shares issued and outstanding (in thousands) (in shares)	10,778,428	11,046,806	11,236,230
Diluted earnings per common share (in dollars per share)	$ 1.56	$ 1.49	$ 1.31

Earnings Per Common Share - Add

Earnings Per Common Share - Additional Information (Details) - $ / shares	Aug. 24, 2017	Sep. 30, 2011	Sep. 30, 2017
Warrant
Conversion of Stock [Line Items]
Shares issued (in shares)		700,000,000
Exercise price per warrant (in dollars per share)		$ 7.142857
Common Stock
Conversion of Stock [Line Items]
Common stock issued in connection with exercise of warrants and exchange of preferred stock (in shares)	700,000,000		700,000,000

Earnings Per Common Share - Ant

Earnings Per Common Share - Antidilutive Securities (Details) - shares shares in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Stock Options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Average options to purchase shares of common stock (in shares)	21	45	66
Common Stock | Warrant
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Average options to purchase shares of common stock (in shares)	122	122	122
Series L Preferred Stock | Convertible Preferred Stock Subject to Mandatory Redemption
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Average options to purchase shares of common stock (in shares)	62	62	62

Earnings Per Common Share - Dil

Earnings Per Common Share - Dilutive Shares (Details) - shares shares in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Common Stock
Class of Stock [Line Items]
Incremental common shares attributable to dilutive effect of call options and warrants (in shares)	143	150	150
Series T Preferred Stock
Class of Stock [Line Items]
Incremental common shares attributable to dilutive effect of conversion of preferred stock (in shares)		700	700

Regulatory Requirements and 148

Regulatory Requirements and Restrictions (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Leverage-based Capital Metrics [Abstract]
Transition capital conservation buffer	1.25%	0.625%
G-SIB Surcharge	1.50%	0.75%
Countercyclical capital buffer	0.00%	0.00%
Bank of America Corporation
Risk-based capital metrics:
Common equity tier 1 capital ratio, regulatory minimum	7.25%	5.875%
Tier 1 capital ratio, regulatory minimum	8.75%	7.375%
Total capital ratio, regulatory minimum	10.75%	9.375%
Leverage-based Capital Metrics [Abstract]
Tier 1 leverage ratio, regulatory minimum	4.00%	4.00%
Bank of America, N.A. | Subsidiaries
Risk-based capital metrics:
Common equity tier 1 capital ratio, regulatory minimum	6.50%	6.50%
Tier 1 capital ratio, regulatory minimum	8.00%	8.00%
Total capital ratio, regulatory minimum	10.00%	10.00%
Leverage-based Capital Metrics [Abstract]
Tier 1 leverage ratio, regulatory minimum	5.00%	5.00%
Standardized Approach | Bank of America Corporation
Risk-based capital metrics:
Common equity tier 1 capital	$ 171,063	$ 168,866
Tier 1 capital	191,496	190,315
Total capital	227,427	228,187
Risk-weighted assets (in billions)	$ 1,434,000	$ 1,399,000
Common equity tier 1 capital ratio	11.90%	12.10%
Tier 1 capital ratio	13.40%	13.60%
Total capital ratio	15.90%	16.30%
Leverage-based Capital Metrics [Abstract]
Adjusted quarterly average assets (in billions)	$ 2,224,000	$ 2,131,000
Tier 1 leverage ratio	8.60%	8.90%
Standardized Approach | Bank of America, N.A. | Subsidiaries
Risk-based capital metrics:
Common equity tier 1 capital	$ 150,552	$ 149,755
Tier 1 capital	150,552	149,755
Total capital	163,243	163,471
Risk-weighted assets (in billions)	$ 1,201,000	$ 1,176,000
Common equity tier 1 capital ratio	12.50%	12.70%
Tier 1 capital ratio	12.50%	12.70%
Total capital ratio	13.60%	13.90%
Leverage-based Capital Metrics [Abstract]
Adjusted quarterly average assets (in billions)	$ 1,672,000	$ 1,611,000
Tier 1 leverage ratio	9.00%	9.30%
Advanced Approaches | Bank of America Corporation
Risk-based capital metrics:
Common equity tier 1 capital	$ 171,063	$ 168,866
Tier 1 capital	191,496	190,315
Total capital	218,529	218,981
Risk-weighted assets (in billions)	$ 1,449,000	$ 1,530,000
Common equity tier 1 capital ratio	11.80%	11.00%
Tier 1 capital ratio	13.20%	12.40%
Total capital ratio	15.10%	14.30%
Leverage-based Capital Metrics [Abstract]
Adjusted quarterly average assets (in billions)	$ 2,224,000	$ 2,131,000
Tier 1 leverage ratio	8.60%	8.90%
Advanced Approaches | Bank of America, N.A. | Subsidiaries
Risk-based capital metrics:
Common equity tier 1 capital	$ 150,552	$ 149,755
Tier 1 capital	150,552	149,755
Total capital	154,675	154,697
Risk-weighted assets (in billions)	$ 1,007,000	$ 1,045,000
Common equity tier 1 capital ratio	14.90%	14.30%
Tier 1 capital ratio	14.90%	14.30%
Total capital ratio	15.40%	14.80%
Leverage-based Capital Metrics [Abstract]
Adjusted quarterly average assets (in billions)	$ 1,672,000	$ 1,611,000
Tier 1 leverage ratio	9.00%	9.30%

Regulatory Requirements and 149

Regulatory Requirements and Restrictions - Other Regulatory Matters (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Average daily reserve balance requirements, in excess of vault cash, maintained with the Federal Reserve	$ 8,900	$ 7,700
Cash segregated under other regulations	4,100	4,800
Securities segregated under other regulations	17,300	14,600
Deposits with clearing organizations	11,900	$ 10,200
Bank of America, N.A.
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Cash dividends paid to parent company by consolidated subsidiaries	$ 22,200
Preceding period of net profits for dividends	2 years
Cash dividends allowable to be declared and paid by parent company by consolidated subsidiaries	$ 6,000
Subsidiaries, Bank of America California, N.A.
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Cash dividends paid to parent company by consolidated subsidiaries	275
Cash dividends allowable to be declared and paid by parent company by consolidated subsidiaries	$ 195

Employee Benefit Plans - Narrat

Employee Benefit Plans - Narrative (Details) - USD ($) shares in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 25,675,000,000	$ 23,772,000,000
Increase (decrease) from change in weighted average discount rates	1,100,000,000	(1,300,000,000)
Defined Contribution Plan:
Cost recognized	$ 1,000,000,000	$ 1,000,000,000	$ 1,000,000,000
Number of common stock shares held in plan (in shares)	218	224
Dividend payments to the plan	$ 86,000,000	$ 60,000,000	48,000,000
Interest Rate Swap
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	156,000,000	257,000,000
Participant Loans
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	20,000,000	36,000,000
Commodity and Balanced Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	451,000,000	369,000,000
Other Various Investments
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	197,000,000	168,000,000
U.S. | Pension Plan | Qualified
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	19,708,000,000	18,239,000,000	17,962,000,000
Company contributions	$ 0	0
Percentage of prior years market gains (losses) recognized at next measurement date	60.00%
Percentage of prior years market gains (losses) recognized equally over four year period	40.00%
Effect of 25 basis point decline in discount rate on net periodic benefit cost	$ 6,000,000
Effect of 25 basis point decline in expected return on plan assets on net periodic benefit cost	45,000,000
Plan assets recognized in the next fiscal year with respect to decline in discount rate	6,000,000
Plan assets recognized in the next fiscal year with respect to decline in expected return	47,000,000
U.S. | Pension Plan | Qualified | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Amount of employer and related party securities included in plan assets	$ 261,000,000	$ 203,000,000
Actual plan asset allocations	1.33%	1.11%
U.S. | Other Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Company contributions	$ 0	$ 0
U.S. | Other Pension Plan | Nonqualified
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2,724,000,000	2,744,000,000	2,805,000,000
Company contributions	98,000,000	104,000,000
Estimated future employer contributions in next fiscal year	92,000,000
U.S. | Postretirement Health and Life Plans
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	300,000,000	0	0
Company contributions	393,000,000	104,000,000
Estimated future employer contributions in next fiscal year	$ 19,000,000
Percentage of unrecognized gain (loss) recognized during the period	50.00%
Health care cost trend rate assumed for next fiscal year	7.00%
Ultimate health care cost trend rate	5.00%
Effect of 1% increase on service and interest cost components	$ 1,000,000
Effect of 1% increase on accumulated postretirement benefit obligation	26,000,000
Effect of 1% decrease on service and interest cost components	1,000,000
Effect of 1% decrease on accumulated postretirement benefit obligation	23,000,000
Non-U.S. | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2,943,000,000	2,789,000,000	$ 2,738,000,000
Company contributions	23,000,000	$ 48,000,000
Estimated future employer contributions in next fiscal year	$ 17,000,000

Employee Benefit Plans - Pensio

Employee Benefit Plans - Pension and Postretirement Plans (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2017	Dec. 31, 2016
Change in fair value of plan assets
Fair value, January 1	$ 23,772,000,000
Fair value, December 31	25,675,000,000	$ 23,772,000,000
U.S. | Other Pension Plan
Change in fair value of plan assets
Company contributions	0	0
U.S. | Postretirement Health and Life Plans
Change in fair value of plan assets
Fair value, January 1	0	0
Actual return on plan assets	0	0
Company contributions	393,000,000	104,000,000
Plan participant contributions	125,000,000	125,000,000
Settlements and curtailments	0	0
Benefits paid	(230,000,000)	(242,000,000)
Federal subsidy on benefits paid	12,000,000	13,000,000
Fair value, December 31	300,000,000	0	$ 0
Change in projected benefit obligation
Projected benefit obligation, January 1	1,125,000,000	1,152,000,000
Service cost	6,000,000	7,000,000	8,000,000
Interest cost	43,000,000	47,000,000	48,000,000
Plan participant contributions	125,000,000	125,000,000
Plan amendments	(19,000,000)	0
Settlements and curtailments	0	0
Actuarial loss (gain)	(7,000,000)	25,000,000
Benefits paid	(230,000,000)	(242,000,000)
Federal subsidy on benefits paid	12,000,000	13,000,000
Foreign currency exchange rate changes	1,000,000	(2,000,000)
Projected benefit obligation, December 31	1,056,000,000	1,125,000,000	1,152,000,000
Amounts recognized on Consolidated Balance Sheet
Other assets				$ 0	$ 0
Accrued expenses and other liabilities				(756,000,000)	(1,125,000,000)
Net amount recognized, December 31				(756,000,000)	(1,125,000,000)
Funded status, December 31
Projected benefit obligation	1,125,000,000	1,152,000,000	1,152,000,000	$ 1,056,000,000	$ 1,125,000,000
Weighted-average assumptions, December 31
Discount rate				3.58%	3.99%
U.S. | Qualified | Pension Plan
Change in fair value of plan assets
Fair value, January 1	18,239,000,000	17,962,000,000
Actual return on plan assets	2,285,000,000	1,075,000,000
Company contributions	0	0
Plan participant contributions	0	0
Settlements and curtailments	0	0
Benefits paid	(816,000,000)	(798,000,000)
Fair value, December 31	19,708,000,000	18,239,000,000	17,962,000,000
Change in projected benefit obligation
Projected benefit obligation, January 1	14,982,000,000	14,461,000,000
Service cost	0	0	0
Interest cost	606,000,000	634,000,000	621,000,000
Plan participant contributions	0	0
Plan amendments	0	0
Settlements and curtailments	0	0
Actuarial loss (gain)	934,000,000	685,000,000
Benefits paid	(816,000,000)	(798,000,000)
Projected benefit obligation, December 31	15,706,000,000	14,982,000,000	14,461,000,000
Amounts recognized on Consolidated Balance Sheet
Other assets				$ 4,002,000,000	$ 3,257,000,000
Accrued expenses and other liabilities				0	0
Net amount recognized, December 31				4,002,000,000	3,257,000,000
Funded status, December 31
Accumulated benefit obligation				15,706,000,000	14,982,000,000
Overfunded (unfunded) status of ABO				4,002,000,000	3,257,000,000
Provision for future salaries				0	0
Projected benefit obligation	14,982,000,000	14,461,000,000	14,461,000,000	$ 15,706,000,000	$ 14,982,000,000
Weighted-average assumptions, December 31
Discount rate				3.68%	4.16%
U.S. | Nonqualified | Other Pension Plan
Change in fair value of plan assets
Fair value, January 1	2,744,000,000	2,805,000,000
Actual return on plan assets	128,000,000	74,000,000
Company contributions	98,000,000	104,000,000
Plan participant contributions	0	0
Settlements and curtailments	0	(6,000,000)
Benefits paid	(246,000,000)	(233,000,000)
Fair value, December 31	2,724,000,000	2,744,000,000	2,805,000,000
Change in projected benefit obligation
Projected benefit obligation, January 1	3,047,000,000	3,053,000,000
Service cost	1,000,000	0	0
Interest cost	117,000,000	127,000,000	122,000,000
Plan participant contributions	0	0
Plan amendments	0	0
Settlements and curtailments	0	(6,000,000)
Actuarial loss (gain)	128,000,000	106,000,000
Benefits paid	(246,000,000)	(233,000,000)
Projected benefit obligation, December 31	3,047,000,000	3,047,000,000	3,053,000,000
Amounts recognized on Consolidated Balance Sheet
Other assets				$ 730,000,000	$ 760,000,000
Accrued expenses and other liabilities				(1,053,000,000)	(1,063,000,000)
Net amount recognized, December 31				(323,000,000)	(303,000,000)
Funded status, December 31
Accumulated benefit obligation				3,046,000,000	3,046,000,000
Overfunded (unfunded) status of ABO				(322,000,000)	(302,000,000)
Provision for future salaries				1,000,000	1,000,000
Projected benefit obligation	3,047,000,000	3,053,000,000	3,053,000,000	$ 3,047,000,000	$ 3,047,000,000
Weighted-average assumptions, December 31
Discount rate				3.58%	4.01%
Rate of compensation increase				4.00%	4.00%
Non-U.S. | Pension Plan
Change in fair value of plan assets
Fair value, January 1	2,789,000,000	2,738,000,000
Actual return on plan assets	118,000,000	541,000,000
Company contributions	23,000,000	48,000,000
Plan participant contributions	1,000,000	1,000,000
Settlements and curtailments	(190,000,000)	(20,000,000)
Benefits paid	(54,000,000)	(118,000,000)
Foreign currency exchange rate changes	256,000,000	(401,000,000)
Fair value, December 31	2,943,000,000	2,789,000,000	2,738,000,000
Change in projected benefit obligation
Projected benefit obligation, January 1	2,763,000,000	2,580,000,000
Service cost	24,000,000	25,000,000	27,000,000
Interest cost	72,000,000	86,000,000	93,000,000
Plan participant contributions	1,000,000	1,000,000
Plan amendments	0	0
Settlements and curtailments	(200,000,000)	(31,000,000)
Actuarial loss (gain)	(26,000,000)	535,000,000
Benefits paid	(54,000,000)	(118,000,000)
Foreign currency exchange rate changes	234,000,000	(315,000,000)
Projected benefit obligation, December 31	2,814,000,000	2,763,000,000	2,580,000,000
Amounts recognized on Consolidated Balance Sheet
Other assets				$ 610,000,000	$ 475,000,000
Accrued expenses and other liabilities				(481,000,000)	(449,000,000)
Net amount recognized, December 31				129,000,000	26,000,000
Funded status, December 31
Accumulated benefit obligation				2,731,000,000	2,645,000,000
Overfunded (unfunded) status of ABO				212,000,000	144,000,000
Provision for future salaries				83,000,000	118,000,000
Projected benefit obligation	$ 2,763,000,000	$ 2,580,000,000	$ 2,580,000,000	$ 2,814,000,000	$ 2,763,000,000
Weighted-average assumptions, December 31
Discount rate				2.39%	2.56%
Rate of compensation increase				4.31%	4.51%

Employee Benefit Plans - ABO an

Employee Benefit Plans - ABO and PBO in Excess of Plan Assets (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Non-U.S. | Pension Plan
Plans with PBO and ABO in Excess of Plan Assets
PBO	$ 671	$ 626
ABO	644	594
Fair value of plan assets	191	179
U.S. | Nonqualified | Other Pension Plan
Plans with PBO and ABO in Excess of Plan Assets
PBO	1,054	1,065
ABO	1,053	1,064
Fair value of plan assets	$ 1	$ 1

Employee Benefit Plans - Compon

Employee Benefit Plans - Components of Net Periodic Benefit Cost (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
U.S. | Postretirement Health and Life Plans
Components of net periodic benefit cost (income)
Service cost	$ 6	$ 7	$ 8
Interest cost	43	47	48
Expected return on plan assets	0	0	(1)
Amortization of net actuarial loss (gain)	(21)	(81)	(46)
Other	4	4	4
Net periodic benefit cost (income)	$ 32	$ (23)	$ 13
Weighted-average assumptions used to determine net cost for years ended December 31
Discount rate	3.99%	4.32%	3.75%
Expected return on plan assets			6.00%
Non-U.S. | Pension Plan
Components of net periodic benefit cost (income)
Service cost	$ 24	$ 25	$ 27
Interest cost	72	86	93
Expected return on plan assets	(136)	(123)	(133)
Amortization of net actuarial loss (gain)	8	6	6
Other	(7)	2	1
Net periodic benefit cost (income)	$ (39)	$ (4)	$ (6)
Weighted-average assumptions used to determine net cost for years ended December 31
Discount rate	2.56%	3.59%	3.56%
Expected return on plan assets	4.73%	4.84%	5.27%
Rate of compensation increase	4.51%	4.67%	4.70%
Qualified | U.S. | Pension Plan
Components of net periodic benefit cost (income)
Service cost	$ 0	$ 0	$ 0
Interest cost	606	634	621
Expected return on plan assets	(1,068)	(1,038)	(1,045)
Amortization of net actuarial loss (gain)	154	139	170
Other	0	0	0
Net periodic benefit cost (income)	$ (308)	$ (265)	$ (254)
Weighted-average assumptions used to determine net cost for years ended December 31
Discount rate	4.16%	4.51%	4.12%
Expected return on plan assets	6.00%	6.00%	6.00%
Nonqualified | U.S. | Other Pension Plan
Components of net periodic benefit cost (income)
Service cost	$ 1	$ 0	$ 0
Interest cost	117	127	122
Expected return on plan assets	(95)	(101)	(92)
Amortization of net actuarial loss (gain)	34	25	34
Other	0	3	0
Net periodic benefit cost (income)	$ 57	$ 54	$ 64
Weighted-average assumptions used to determine net cost for years ended December 31
Discount rate	4.01%	4.34%	3.80%
Expected return on plan assets	3.50%	3.66%	3.26%
Rate of compensation increase	4.00%	4.00%	4.00%

Employee Benefit Plans - Pretax

Employee Benefit Plans - Pretax Amounts Included in Accumulated OCI (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss (gain)	$ 5,172	$ 5,554
Prior service cost (credits)	(7)	16
Amounts recognized in accumulated OCI	5,165	5,570
U.S. | Postretirement Health and Life Plans
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss (gain)	(30)	(44)
Prior service cost (credits)	(11)	12
Amounts recognized in accumulated OCI	(41)	(32)
Non-U.S. | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss (gain)	196	216
Prior service cost (credits)	4	4
Amounts recognized in accumulated OCI	200	220
Qualified | U.S. | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss (gain)	3,992	4,429
Prior service cost (credits)	0	0
Amounts recognized in accumulated OCI	3,992	4,429
Nonqualified | U.S. | Other Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss (gain)	1,014	953
Prior service cost (credits)	0	0
Amounts recognized in accumulated OCI	$ 1,014	$ 953

Employee Benefit Plans - Pre155

Employee Benefit Plans - Pretax Amounts Recognized in OCI (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, before Tax [Abstract]
Current year actuarial loss (gain)	$ (207)	$ 906
Amortization of actuarial gain (loss)	(175)	(92)
Current year prior service cost (credit)	(19)	0
Amortization of prior service cost	(4)	(5)
Amounts recognized in OCI	(405)	809
Amounts amortized from accumulated OCI	176
U.S. | Postretirement Health and Life Plans
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, before Tax [Abstract]
Current year actuarial loss (gain)	(7)	25
Amortization of actuarial gain (loss)	21	81
Current year prior service cost (credit)	(19)	0
Amortization of prior service cost	(4)	(4)
Amounts recognized in OCI	(9)	102
Non-U.S. | Pension Plan
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, before Tax [Abstract]
Current year actuarial loss (gain)	(12)	100
Amortization of actuarial gain (loss)	(8)	(6)
Current year prior service cost (credit)	0	0
Amortization of prior service cost	0	(1)
Amounts recognized in OCI	(20)	93
Qualified | U.S. | Pension Plan
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, before Tax [Abstract]
Current year actuarial loss (gain)	(283)	648
Amortization of actuarial gain (loss)	(154)	(139)
Current year prior service cost (credit)	0	0
Amortization of prior service cost	0	0
Amounts recognized in OCI	(437)	509
Nonqualified | U.S. | Other Pension Plan
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, before Tax [Abstract]
Current year actuarial loss (gain)	95	133
Amortization of actuarial gain (loss)	(34)	(28)
Current year prior service cost (credit)	0	0
Amortization of prior service cost	0	0
Amounts recognized in OCI	$ 61	$ 105

Employee Benefit Plans - Target

Employee Benefit Plans - Target Allocation (Details)	Dec. 31, 2017
U.S. | Qualified | Maximum | Pension Plan | Equity securities
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Target Allocation, Percentage	60.00%
U.S. | Qualified | Maximum | Pension Plan | Debt securities
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Target Allocation, Percentage	70.00%
U.S. | Qualified | Maximum | Pension Plan | Real Estate
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Target Allocation, Percentage	10.00%
U.S. | Qualified | Maximum | Pension Plan | Other
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Target Allocation, Percentage	5.00%
U.S. | Qualified | Minimum | Pension Plan | Equity securities
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Target Allocation, Percentage	30.00%
U.S. | Qualified | Minimum | Pension Plan | Debt securities
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Target Allocation, Percentage	40.00%
U.S. | Qualified | Minimum | Pension Plan | Real Estate
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Target Allocation, Percentage	0.00%
U.S. | Qualified | Minimum | Pension Plan | Other
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Target Allocation, Percentage	0.00%
U.S. | Nonqualified | Maximum | Other Pension Plan | Equity securities
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Target Allocation, Percentage	5.00%
U.S. | Nonqualified | Maximum | Other Pension Plan | Debt securities
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Target Allocation, Percentage	100.00%
U.S. | Nonqualified | Maximum | Other Pension Plan | Real Estate
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Target Allocation, Percentage	5.00%
U.S. | Nonqualified | Maximum | Other Pension Plan | Other
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Target Allocation, Percentage	5.00%
U.S. | Nonqualified | Minimum | Other Pension Plan | Equity securities
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Target Allocation, Percentage	0.00%
U.S. | Nonqualified | Minimum | Other Pension Plan | Debt securities
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Target Allocation, Percentage	95.00%
U.S. | Nonqualified | Minimum | Other Pension Plan | Real Estate
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Target Allocation, Percentage	0.00%
U.S. | Nonqualified | Minimum | Other Pension Plan | Other
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Target Allocation, Percentage	0.00%
Non-U.S. | Maximum | Pension Plan | Equity securities
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Target Allocation, Percentage	35.00%
Non-U.S. | Maximum | Pension Plan | Debt securities
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Target Allocation, Percentage	80.00%
Non-U.S. | Maximum | Pension Plan | Real Estate
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Target Allocation, Percentage	15.00%
Non-U.S. | Maximum | Pension Plan | Other
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Target Allocation, Percentage	25.00%
Non-U.S. | Minimum | Pension Plan | Equity securities
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Target Allocation, Percentage	5.00%
Non-U.S. | Minimum | Pension Plan | Debt securities
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Target Allocation, Percentage	40.00%
Non-U.S. | Minimum | Pension Plan | Real Estate
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Target Allocation, Percentage	0.00%
Non-U.S. | Minimum | Pension Plan | Other
Defined Benefit Plan, Assets, Target Allocations [Abstract]
Target Allocation, Percentage	0.00%

Employee Benefit Plans - Fair V

Employee Benefit Plans - Fair Value Measurements (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 25,675	$ 23,772
Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	13,332	12,483
Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	11,251	10,260
Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,092	1,029	$ 1,037	$ 962
Money market and interest-bearing cash
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2,190	776
Money market and interest-bearing cash | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2,190	776
Money market and interest-bearing cash | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Money market and interest-bearing cash | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Cash and cash equivalent commingled/mutual funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,004	997
Cash and cash equivalent commingled/mutual funds | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Cash and cash equivalent commingled/mutual funds | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,004	997
Cash and cash equivalent commingled/mutual funds | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
U.S. government and agency securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	4,194	3,951
U.S. government and agency securities | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	3,331	3,125
U.S. government and agency securities | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	854	816
U.S. government and agency securities | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	9	10	11	11
Corporate debt securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2,417	1,892
Corporate debt securities | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Corporate debt securities | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2,417	1,892
Corporate debt securities | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Asset-backed securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,832	2,246
Asset-backed securities | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Asset-backed securities | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,832	2,246
Asset-backed securities | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Non-U.S. debt securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,591	1,494
Non-U.S. debt securities | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	693	789
Non-U.S. debt securities | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	898	705
Non-U.S. debt securities | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Fixed income commingled/mutual funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2,451	2,281
Fixed income commingled/mutual funds | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	775	778
Fixed income commingled/mutual funds | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,676	1,503
Fixed income commingled/mutual funds | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Common and preferred equity securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	5,833	6,120
Common and preferred equity securities | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	5,833	6,120
Common and preferred equity securities | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Common and preferred equity securities | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Equity commingled/mutual funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2,024	1,960
Equity commingled/mutual funds | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	271	735
Equity commingled/mutual funds | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,753	1,225
Equity commingled/mutual funds | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Public real estate investment trusts
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	138	145
Public real estate investment trusts | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	138	145
Public real estate investment trusts | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Public real estate investment trusts | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Private real estate
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	93	150
Private real estate | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Private real estate | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Private real estate | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	93	150	144	127
Real estate commingled/mutual funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	844	760
Real estate commingled/mutual funds | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Real estate commingled/mutual funds | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	13	12
Real estate commingled/mutual funds | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	831	748	731	632
Limited partnerships
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	240	170
Limited partnerships | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Limited partnerships | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	155	132
Limited partnerships | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	85	38	49	65
Other investments
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	824	830
Other investments | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	101	15
Other investments | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	649	732
Other investments | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	74	83	$ 102	$ 127
Interest Rate Swap
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	156	257
Participant Loans
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	20	36
Commodity and Balanced Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	451	369
Other Various Investments
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 197	$ 168

Employee Benefit Plans - Level

Employee Benefit Plans - Level 3 Fair Value Measurements (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Change in fair value of plan assets
Fair value, January 1	$ 23,772
Fair value, December 31	25,675	$ 23,772
U.S. government and agency securities
Change in fair value of plan assets
Fair value, January 1	3,951
Fair value, December 31	4,194	3,951
Private real estate
Change in fair value of plan assets
Fair value, January 1	150
Fair value, December 31	93	150
Real estate commingled/mutual funds
Change in fair value of plan assets
Fair value, January 1	760
Fair value, December 31	844	760
Limited partnerships
Change in fair value of plan assets
Fair value, January 1	170
Fair value, December 31	240	170
Other investments
Change in fair value of plan assets
Fair value, January 1	830
Fair value, December 31	824	830
Level 3
Change in fair value of plan assets
Fair value, January 1	1,029	1,037	$ 962
Actual Return on Plan Assets Still Held at the Reporting Date	90	24	45
Purchases, Sales and Settlements	(27)	(32)	30
Fair value, December 31	1,092	1,029	1,037
Level 3 | U.S. government and agency securities
Change in fair value of plan assets
Fair value, January 1	10	11	11
Actual Return on Plan Assets Still Held at the Reporting Date	0	0	0
Purchases, Sales and Settlements	(1)	(1)	0
Fair value, December 31	9	10	11
Level 3 | Private real estate
Change in fair value of plan assets
Fair value, January 1	150	144	127
Actual Return on Plan Assets Still Held at the Reporting Date	8	1	14
Purchases, Sales and Settlements	(65)	5	3
Fair value, December 31	93	150	144
Level 3 | Real estate commingled/mutual funds
Change in fair value of plan assets
Fair value, January 1	748	731	632
Actual Return on Plan Assets Still Held at the Reporting Date	63	21	37
Purchases, Sales and Settlements	20	(4)	62
Fair value, December 31	831	748	731
Level 3 | Limited partnerships
Change in fair value of plan assets
Fair value, January 1	38	49	65
Actual Return on Plan Assets Still Held at the Reporting Date	14	(2)	(1)
Purchases, Sales and Settlements	33	(9)	(15)
Fair value, December 31	85	38	49
Level 3 | Other investments
Change in fair value of plan assets
Fair value, January 1	83	102	127
Actual Return on Plan Assets Still Held at the Reporting Date	5	4	(5)
Purchases, Sales and Settlements	(14)	(23)	(20)
Fair value, December 31	$ 74	$ 83	$ 102

Employee Benefit Plans - Projec

Employee Benefit Plans - Projected Benefit Payments (Details) $ in Millions	Dec. 31, 2017USD ($)
U.S. | Postretirement Health and Life Plans
Projected Benefit Payments
2,018	$ 92
2,019	87
2,020	84
2,021	81
2,022	78
2023 - 2027	343
U.S. | Qualified | Pension Plan
Projected Benefit Payments
2,018	927
2,019	912
2,020	924
2,021	912
2,022	919
2023 - 2027	4,455
U.S. | Nonqualified | Other Pension Plan
Projected Benefit Payments
2,018	237
2,019	239
2,020	242
2,021	239
2,022	232
2023 - 2027	1,073
Non-U.S. | Pension Plan
Projected Benefit Payments
2,018	90
2,019	98
2,020	104
2,021	112
2,022	121
2023 - 2027	$ 695

Stock-based Compensation Pla160

Stock-based Compensation Plans - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended			108 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2017	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation cost	$ 2,200	$ 2,200	$ 2,100
Tax benefit from compensation expense	$ 829	$ 835	$ 792
Options granted (in shares)				0
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of vesting installments	3 years
Restricted Stock Units (RSUs) | Year 1
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	33.33%
Restricted Stock Units (RSUs) | Year 2
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	33.33%
Restricted Stock Units (RSUs) | Year 3
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	33.33%
Key Employee Equity Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares)					450,000,000
Key Employee Equity Plan | Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock units granted in period (in shares)	85,000,000	163,000,000

Stock-based Compensation Pla161

Stock-based Compensation Plans - Restricted Stock Units (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Weighted-average Grant Date Fair Value
Cash used to settle awards	$ 1,900	$ 1,700	$ 3,000
Stock-settled Restricted Stock and Restricted Stock Units
Shares/Units
Outstanding at beginning of period (in shares)	156,492,946
Granted (in shares)	81,555,447
Vested (in shares)	(52,187,746)
Canceled (in shares)	(6,587,404)
Outstanding at end of period (in shares)	179,273,243	156,492,946
Weighted-average Grant Date Fair Value
Outstanding at beginning of period (in dollars per share)	$ 11.99
Granted (in dollars per share)	24.58
Vested (in dollars per share)	12.01
Canceled (in dollars per share)	16.93
Outstanding at end of period (in dollars per share)	$ 17.53	$ 11.99
Cash-settled Restricted Stock Units | Key Employee Equity Plan
Shares/Units
Outstanding at beginning of period (in shares)	121,235,489
Granted (in shares)	3,105,988
Vested (in shares)	(79,525,864)
Canceled (in shares)	(2,605,987)
Outstanding at end of period (in shares)	42,209,626	121,235,489
Restricted Stock and Restricted Stock Units
Weighted-average Grant Date Fair Value
Total unrecognized compensation cost	$ 1,100
Expected period of total unrecognized compensation cost	4 years
Total unrecognized compensation cost, period for recognition	1 year 8 months 12 days
Fair value of vested in period	$ 1,300	$ 358	$ 145

Stock-based Compensation Pla162

Stock-based Compensation Plans - Stock Options (Details)	12 Months Ended	108 Months Ended
	Dec. 31, 2017USD ($)$ / sharesshares	Dec. 31, 2017USD ($)$ / sharesshares
Options
Outstanding at beginning of period (in shares)	42,357,282
Forfeited (in shares)	(25,769,108)
Outstanding at end of period (in shares)	16,588,174	16,588,174
Weighted-average Exercise Price
Outstanding at beginning of period (in dollars per share) | $ / shares	$ 50.57
Forfeited (in dollars per share) | $ / shares	55.15
Outstanding at end of period (in dollars per share) | $ / shares	$ 43.44	$ 43.44
Outstanding, weighted average remaining contractual term (less than)	1 year
Aggregate intrinsic value | $	$ 0	$ 0
Options granted (in shares)		0

Income Taxes - Components of In

Income Taxes - Components of Income Tax Expense (Benefit) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Current income tax expense
U.S. federal	$ 1,310	$ 302	$ 2,539
U.S. state and local	557	120	210
Non-U.S.	939	984	561
Total current expense	2,806	1,406	3,310
Deferred income tax expense
U.S. federal	7,238	5,416	1,855
U.S. state and local	835	(279)	515
Non-U.S.	102	656	597
Total deferred expense	8,175	5,793	2,967
Total income tax expense	$ 10,981	$ 7,199	$ 6,277

Income Taxes - Narrative (Detai

Income Taxes - Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2017USD ($)Jurisdiction	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)
Income Tax Disclosure [Abstract]
Estimated impact on net income (loss)	$ 2,900
Provisional income tax expense (benefit)	2,300
Provisional investment valuation adjustment	(946)
Provisional income tax expense (benefit), investments	(347)
Estimated incremental income tax expense	$ 1,900
Accumulated Other Comprehensive Income (Loss) [Line Items]
Tax effect on common stock and additional paid in capital from employee stock purchase plan activity		$ (41)	$ (44)
Expected U.S. federal income tax expense	35.00%	35.00%	35.00%
Unrecognized tax benefits that would impact effective rate	$ 1,200	$ 600	$ 700
Number of jurisdictions for filing income tax returns (more than) | Jurisdiction	100
Unrecognized tax benefits is reasonable possible, amount of unrecorded benefit	$ 400
Penalties and interest expense	1	56	(82)
Penalties and interest accrued	185	167
Provisional undistributed accumulated earnings of foreign subsidiary	5,000
Provisional unrecognized deferred tax liability	1,000
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss), tax	$ 1,229	$ 498	$ (631)

Income Taxes - Reconciliation o

Income Taxes - Reconciliation of Income Tax Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Amount
Expected U.S. federal income tax expense	$ 10,225	$ 8,757	$ 7,765
Increase (decrease) in taxes resulting from:
State tax expense, net of federal benefit	881	420	438
Tax law changes	2,281	348	289
Changes in prior-period UTBs, including interest	133	(328)	(52)
Nondeductible expenses	97	180	40
Affordable housing/energy/other credits	(1,406)	(1,203)	(1,087)
Tax-exempt income, including dividends	(672)	(562)	(539)
Non-U.S. tax rate differential	(272)	(307)	(559)
Share-based compensation	(236)	0	0
Other	(50)	(106)	(18)
Total income tax expense	$ 10,981	$ 7,199	$ 6,277
Percent
Expected U.S. federal income tax expense	35.00%	35.00%	35.00%
Increase (decrease) in taxes resulting from:
State tax expense, net of federal benefit	3.00%	1.70%	2.00%
Tax law changes	7.80%	1.40%	1.30%
Changes in prior-period UTBs, including interest	0.50%	(1.30%)	(0.20%)
Nondeductible expenses	0.30%	0.70%	0.10%
Affordable housing/energy/other credits	(4.80%)	(4.80%)	(4.90%)
Tax-exempt income, including dividends	(2.30%)	(2.20%)	(2.40%)
Non-U.S. tax rate differential	(0.90%)	(1.20%)	(2.50%)
Share-based compensation	(0.80%)	0.00%	0.00%
Other	(0.20%)	(0.50%)	(0.10%)
Total income tax expense	37.60%	28.80%	28.30%

Income Taxes - Reconciliatio166

Income Taxes - Reconciliation of the Change in Unrecognized Tax Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance, January 1	$ 875	$ 1,095	$ 1,068
Increases related to positions taken during the current year	292	104	36
Increases related to positions taken during prior years	750	1,318	187
Decreases related to positions taken during prior years	(122)	(1,091)	(177)
Settlements	(17)	(503)	(1)
Expiration of statute of limitations	(5)	(48)	(18)
December 31, 2017	$ 1,773	$ 875	$ 1,095

Income Taxes - Deferred Tax Ass

Income Taxes - Deferred Tax Assets and Deferred Tax Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Net operating loss carryforwards
Net operating loss carryforwards	$ 8,506	$ 9,199
Security, loan and debt valuations	2,939	4,726
Allowance for credit losses	2,598	4,362
Accrued expenses	2,021	3,016
Tax credit carryforwards	1,793	3,125
Employee compensation and retirement benefits	1,705	3,042
Available-for-sale securities	510	784
Other	1,034	1,599
Gross deferred tax assets	21,106	29,853
Valuation allowance	(1,644)	(1,117)
Total deferred tax assets, net of valuation allowance	19,462	28,736
Deferred tax liabilities
Equipment lease financing	2,492	3,489
Tax credit partnerships	734	539
Intangibles	670	1,171
Fee income	601	847
Mortgage servicing rights	349	829
Long-term borrowings	227	355
Other	1,764	1,915
Gross deferred tax liabilities	6,837	9,145
Net deferred tax assets, net of valuation allowance	$ 12,625	$ 19,591

Income Taxes - Net Operating Lo

Income Taxes - Net Operating Loss and Tax Credit Carryforwards (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Tax Credit Carryforward [Line Items]
Deferred Tax Asset	$ 1,793	$ 3,125
Operating Loss Carryforwards [Line Items]
Deferred Tax Asset	8,506	$ 9,199
Net operating losses before benefit of federal deductions	2,100
Valuation allowance before considering benefit of federal deductions	739
General business credits
Tax Credit Carryforward [Line Items]
Deferred Tax Asset	1,721
Valuation Allowance	0
Net Deferred Tax Asset	1,721
Foreign tax credits
Tax Credit Carryforward [Line Items]
Deferred Tax Asset	72
Valuation Allowance	(72)
Net Deferred Tax Asset	0
Net operating losses - U.S.
Operating Loss Carryforwards [Line Items]
Deferred Tax Asset	868
Valuation Allowance	0
Net Deferred Tax Asset	868
Net operating losses – U.K. and Other non-U.S.
Operating Loss Carryforwards [Line Items]
Deferred Tax Asset	657
Valuation Allowance	(578)
Net Deferred Tax Asset	79
Net operating losses – U.K. and Other non-U.S. | United Kingdom
Operating Loss Carryforwards [Line Items]
Deferred Tax Asset	5,347
Valuation Allowance	0
Net Deferred Tax Asset	5,347
Net operating losses – U.S. states
Operating Loss Carryforwards [Line Items]
Deferred Tax Asset	1,634
Valuation Allowance	(584)
Net Deferred Tax Asset	$ 1,050

Fair Value Measurements - Recur

Fair Value Measurements - Recurring Fair Value (Details) $ in Millions	12 Months Ended
	Dec. 31, 2017USD ($)counterparty	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)
Financial assets
Federal funds sold and securities borrowed or purchased under agreements to resell	$ 52,906	$ 49,750
Trading account assets	209,358	180,209
Gross Derivative Assets	351,600	631,100
Derivative assets	37,762	42,512
Total available-for-sale debt securities	302,631
Other debt securities carried at fair value	12,486	19,720
Loans and leases	5,710	7,085
Loans held-for-sale	2,156	4,026
Debt securities in assets of business held for sale		619
Other assets	20,279	13,802
Liabilities
Interest-bearing deposits in U.S. offices	449	731
Federal funds purchased and securities loaned or sold under agreements to repurchase, measured at fair value	36,182	35,766
Gross Derivative Liabilities	346,000	628,300
Derivative liabilities	34,300	39,480
Short-term borrowings	1,494	2,024
Long-term debt	$ 31,786	30,037
Assets and Liabilities, Recurring Basis, Supplemental Information:
Number of central clearing counterparties to re-characterize daily cash variation margin | counterparty	2
Operating Segments | Consumer Banking
Financial assets
Mortgage servicing rights	$ 1,700	2,100
Operating Segments | Global Markets
Financial assets
Mortgage servicing rights	510	469
All Other
Financial assets
Mortgage servicing rights	135	212
Derivative liabilities
Assets and Liabilities, Recurring Basis, Supplemental Information:
Liabilities transferred from Level 1 to Level 2	3,000	2,400
Liabilities transferred from Level 2 to Level 1	608	1,800
Derivative assets
Assets and Liabilities, Recurring Basis, Supplemental Information:
Assets transferred from Level 1 to Level 2	4,200	2,300
Assets transferred from Level 2 to Level 1	758	2,000
U.S. Treasury and agency securities | Trading Securities
Assets and Liabilities, Recurring Basis, Supplemental Information:
Assets transferred from Level 1 to Level 2	1,100
Equity securities | Trading Securities
Assets and Liabilities, Recurring Basis, Supplemental Information:
Liabilities transferred from Level 1 to Level 2	3,100
Liabilities transferred from Level 2 to Level 1	4,300
Equity securities | Trading Securities
Assets and Liabilities, Recurring Basis, Supplemental Information:
Assets transferred from Level 1 to Level 2	5,300
Assets transferred from Level 2 to Level 1	14,100
Non-U.S. sovereign debt | Trading Securities
Assets and Liabilities, Recurring Basis, Supplemental Information:
Liabilities transferred from Level 1 to Level 2	1,500
Non-U.S. sovereign debt | Trading Securities
Assets and Liabilities, Recurring Basis, Supplemental Information:
Assets transferred from Level 1 to Level 2	3,300
U.S. government and agency securities
Financial assets
Total available-for-sale debt securities	53,523	48,252
Agency
Financial assets
Total available-for-sale debt securities	192,929	189,486
Agency-collateralized mortgage obligations
Financial assets
Total available-for-sale debt securities	6,804	8,330
Other debt securities carried at fair value	5	5
Non-agency residential
Financial assets
Total available-for-sale debt securities	2,669	2,013
Other debt securities carried at fair value	2,764	3,139
Commercial
Financial assets
Total available-for-sale debt securities	13,684	12,322
Other taxable securities
Financial assets
Total available-for-sale debt securities	5,770	10,614
Other debt securities carried at fair value	229	240
Tax-exempt securities
Financial assets
Total available-for-sale debt securities	20,575	17,160
Recurring
Financial assets
Federal funds sold and securities borrowed or purchased under agreements to resell	52,906	49,750
Trading account assets	209,358	180,209
Netting adjustments	(313,788)	(588,604)
Derivative assets	37,762	42,512
Total available-for-sale debt securities	302,631	293,940
Other debt securities carried at fair value	12,486	19,720
Loans and leases	5,710	7,085
Mortgage servicing rights	2,302	2,747
Loans held-for-sale	2,156	4,026
Debt securities in assets of business held for sale		619
Other assets	20,279	13,802
Total assets	645,590	614,410
Liabilities
Interest-bearing deposits in U.S. offices	449	731
Federal funds purchased and securities loaned or sold under agreements to repurchase, measured at fair value	36,182	35,766
Total trading account liabilities	81,187	63,031
Netting adjustment	(311,771)	(588,833)
Derivative liabilities	34,300	39,480
Short-term borrowings	1,494	2,024
Accrued expenses and other liabilities	22,840	14,630
Long-term debt	31,786	30,037
Total liabilities	208,238	185,699
Recurring | Securities Segregated for Compliance or Deposited with Clearing Organizations
Financial assets
Trading account assets	16,800	14,600
Recurring | U.S. Treasury and agency securities
Financial assets
Trading account assets	40,642	36,514
Liabilities
Total trading account liabilities	18,000	16,051
Recurring | Corporate securities, trading loans and other
Financial assets
Trading account assets	30,578	25,809
Liabilities
Total trading account liabilities	6,925	6,570
Recurring | Equity securities
Financial assets
Trading account assets	84,940	72,051
Liabilities
Total trading account liabilities	36,904	28,898
Recurring | Non-U.S. sovereign debt
Financial assets
Trading account assets	22,940	20,028
Liabilities
Total trading account liabilities	19,358	11,512
Recurring | U.S. government-sponsored agency guaranteed
Financial assets
Trading account assets	20,586	15,799
Recurring | Mortgage trading loans, ABS and other MBS
Financial assets
Trading account assets	9,672	10,008
Recurring | U.S. government and agency securities
Financial assets
Total available-for-sale debt securities	53,523	48,252
Recurring | Agency
Financial assets
Total available-for-sale debt securities	192,929	189,486
Other debt securities carried at fair value		5
Recurring | Agency-collateralized mortgage obligations
Financial assets
Total available-for-sale debt securities	6,804	8,330
Other debt securities carried at fair value	5
Recurring | Non-agency residential
Financial assets
Total available-for-sale debt securities	2,669	2,013
Other debt securities carried at fair value	2,764	3,139
Recurring | Commercial
Financial assets
Total available-for-sale debt securities	13,684	12,322
Recurring | Non-U.S. securities
Financial assets
Total available-for-sale debt securities	6,677	5,763
Other debt securities carried at fair value	9,488	16,336
Recurring | Other taxable securities
Financial assets
Total available-for-sale debt securities	5,770	10,614
Other debt securities carried at fair value	229	240
Recurring | Tax-exempt securities
Financial assets
Total available-for-sale debt securities	20,575	17,160
Recurring | US Government-sponsored enterprises debt securities
Financial assets
Trading account assets	21,300	17,500
Recurring | Level 1
Financial assets
Federal funds sold and securities borrowed or purchased under agreements to resell	0	0
Trading account assets	106,012	94,505
Gross Derivative Assets	6,305	7,337
Total available-for-sale debt securities	52,687	48,721
Other debt securities carried at fair value	8,191	15,109
Loans and leases	0	0
Mortgage servicing rights	0	0
Loans held-for-sale	0	0
Debt securities in assets of business held for sale		619
Other assets	19,367	11,824
Total assets	192,562	178,115
Liabilities
Interest-bearing deposits in U.S. offices	0	0
Federal funds purchased and securities loaned or sold under agreements to repurchase, measured at fair value	0	0
Total trading account liabilities	62,261	51,310
Gross Derivative Liabilities	6,029	7,173
Short-term borrowings	0	0
Accrued expenses and other liabilities	21,887	12,978
Long-term debt	0	0
Total liabilities	90,177	71,461
Recurring | Level 1 | U.S. Treasury and agency securities
Financial assets
Trading account assets	38,720	34,587
Liabilities
Total trading account liabilities	17,266	15,854
Recurring | Level 1 | Corporate securities, trading loans and other
Financial assets
Trading account assets	0	171
Liabilities
Total trading account liabilities	0	163
Recurring | Level 1 | Equity securities
Financial assets
Trading account assets	60,747	50,169
Liabilities
Total trading account liabilities	33,019	25,884
Recurring | Level 1 | Non-U.S. sovereign debt
Financial assets
Trading account assets	6,545	9,578
Liabilities
Total trading account liabilities	11,976	9,409
Recurring | Level 1 | U.S. government-sponsored agency guaranteed
Financial assets
Trading account assets	0	0
Recurring | Level 1 | Mortgage trading loans, ABS and other MBS
Financial assets
Trading account assets	0	0
Recurring | Level 1 | U.S. government and agency securities
Financial assets
Total available-for-sale debt securities	51,915	46,787
Recurring | Level 1 | Agency
Financial assets
Total available-for-sale debt securities	0	0
Other debt securities carried at fair value		0
Recurring | Level 1 | Agency-collateralized mortgage obligations
Financial assets
Total available-for-sale debt securities	0	0
Other debt securities carried at fair value	0
Recurring | Level 1 | Non-agency residential
Financial assets
Total available-for-sale debt securities	0	0
Other debt securities carried at fair value	0	0
Recurring | Level 1 | Commercial
Financial assets
Total available-for-sale debt securities	0	0
Recurring | Level 1 | Non-U.S. securities
Financial assets
Total available-for-sale debt securities	772	1,934
Other debt securities carried at fair value	8,191	15,109
Recurring | Level 1 | Other taxable securities
Financial assets
Total available-for-sale debt securities	0	0
Other debt securities carried at fair value	0	0
Recurring | Level 1 | Tax-exempt securities
Financial assets
Total available-for-sale debt securities	0	0
Recurring | Level 2
Financial assets
Federal funds sold and securities borrowed or purchased under agreements to resell	52,906	49,750
Trading account assets	99,193	80,925
Gross Derivative Assets	341,178	619,848
Total available-for-sale debt securities	248,941	243,854
Other debt securities carried at fair value	4,295	4,586
Loans and leases	5,139	6,365
Mortgage servicing rights	0	0
Loans held-for-sale	1,466	3,370
Debt securities in assets of business held for sale		0
Other assets	789	1,739
Total assets	753,907	1,010,437
Liabilities
Interest-bearing deposits in U.S. offices	449	731
Federal funds purchased and securities loaned or sold under agreements to repurchase, measured at fair value	36,182	35,407
Total trading account liabilities	18,902	11,694
Gross Derivative Liabilities	334,261	615,896
Short-term borrowings	1,494	2,024
Accrued expenses and other liabilities	945	1,643
Long-term debt	29,923	28,523
Total liabilities	422,156	695,918
Recurring | Level 2 | U.S. Treasury and agency securities
Financial assets
Trading account assets	1,922	1,927
Liabilities
Total trading account liabilities	734	197
Recurring | Level 2 | Corporate securities, trading loans and other
Financial assets
Trading account assets	28,714	22,861
Liabilities
Total trading account liabilities	6,901	6,380
Recurring | Level 2 | Equity securities
Financial assets
Trading account assets	23,958	21,601
Liabilities
Total trading account liabilities	3,885	3,014
Recurring | Level 2 | Non-U.S. sovereign debt
Financial assets
Trading account assets	15,839	9,940
Liabilities
Total trading account liabilities	7,382	2,103
Recurring | Level 2 | U.S. government-sponsored agency guaranteed
Financial assets
Trading account assets	20,586	15,799
Recurring | Level 2 | Mortgage trading loans, ABS and other MBS
Financial assets
Trading account assets	8,174	8,797
Recurring | Level 2 | U.S. government and agency securities
Financial assets
Total available-for-sale debt securities	1,608	1,465
Recurring | Level 2 | Agency
Financial assets
Total available-for-sale debt securities	192,929	189,486
Other debt securities carried at fair value		5
Recurring | Level 2 | Agency-collateralized mortgage obligations
Financial assets
Total available-for-sale debt securities	6,804	8,330
Other debt securities carried at fair value	5
Recurring | Level 2 | Non-agency residential
Financial assets
Total available-for-sale debt securities	2,669	2,013
Other debt securities carried at fair value	2,764	3,114
Recurring | Level 2 | Commercial
Financial assets
Total available-for-sale debt securities	13,684	12,322
Recurring | Level 2 | Non-U.S. securities
Financial assets
Total available-for-sale debt securities	5,880	3,600
Other debt securities carried at fair value	1,297	1,227
Recurring | Level 2 | Other taxable securities
Financial assets
Total available-for-sale debt securities	5,261	10,020
Other debt securities carried at fair value	229	240
Recurring | Level 2 | Tax-exempt securities
Financial assets
Total available-for-sale debt securities	20,106	16,618
Recurring | Level 3
Financial assets
Federal funds sold and securities borrowed or purchased under agreements to resell	0	0
Trading account assets	4,153	4,779
Gross Derivative Assets	4,067	3,931	$ 5,100
Total available-for-sale debt securities	1,003	1,365
Other debt securities carried at fair value	0	25
Loans and leases	571	720
Mortgage servicing rights	2,302	2,747
Loans held-for-sale	690	656
Debt securities in assets of business held for sale		0
Other assets	123	239
Total assets	12,909	14,462
Liabilities
Interest-bearing deposits in U.S. offices	0	0
Federal funds purchased and securities loaned or sold under agreements to repurchase, measured at fair value	0	359
Total trading account liabilities	24	27
Gross Derivative Liabilities	5,781	5,244	$ 5,600
Short-term borrowings	0	0
Accrued expenses and other liabilities	8	9
Long-term debt	1,863	1,514
Total liabilities	7,676	7,153
Recurring | Level 3 | U.S. Treasury and agency securities
Financial assets
Trading account assets	0	0
Liabilities
Total trading account liabilities	0	0
Recurring | Level 3 | Corporate securities, trading loans and other
Financial assets
Trading account assets	1,864	2,777
Total assets	1,900	2,800
Liabilities
Total trading account liabilities	24	27
Recurring | Level 3 | Equity securities
Financial assets
Trading account assets	235	281
Liabilities
Total trading account liabilities	0	0
Recurring | Level 3 | Non-U.S. sovereign debt
Financial assets
Trading account assets	556	510
Total assets	556	510
Liabilities
Total trading account liabilities	0	0
Recurring | Level 3 | U.S. government-sponsored agency guaranteed
Financial assets
Trading account assets	0	0
Recurring | Level 3 | Mortgage trading loans, ABS and other MBS
Financial assets
Trading account assets	1,498	1,211
Total assets	1,500	1,200
Recurring | Level 3 | U.S. government and agency securities
Financial assets
Total available-for-sale debt securities	0	0
Recurring | Level 3 | Agency
Financial assets
Total available-for-sale debt securities	0	0
Other debt securities carried at fair value		0
Recurring | Level 3 | Agency-collateralized mortgage obligations
Financial assets
Total available-for-sale debt securities	0	0
Other debt securities carried at fair value	0
Recurring | Level 3 | Non-agency residential
Financial assets
Total available-for-sale debt securities	0	0
Other debt securities carried at fair value	0	25
Recurring | Level 3 | Commercial
Financial assets
Total available-for-sale debt securities	0	0
Recurring | Level 3 | Non-U.S. securities
Financial assets
Total available-for-sale debt securities	25	229
Other debt securities carried at fair value	0	0
Recurring | Level 3 | Other taxable securities
Financial assets
Total available-for-sale debt securities	509	594
Other debt securities carried at fair value	0	0
Total assets	509	594
Recurring | Level 3 | Tax-exempt securities
Financial assets
Total available-for-sale debt securities	469	542
Total assets	$ 469	$ 542

Fair Value Measurements - Recon

Fair Value Measurements - Reconciliation (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Balance, beginning	$ (1,313)	$ (441)	$ (920)
Total Realized/Unrealized Gains/(Losses)	(984)	285	1,335
Gains (Losses) in OCI	0	0	(7)
Purchases	664	470	273
Sales	(979)	(1,155)	(863)
Issuances	0	0	0
Settlements	949	76	(261)
Gross Transfers into Level 3	48	(186)	(40)
Gross Transfers out of Level 3	(99)	(362)	42
Balance, ending	(1,714)	(1,313)	(441)
Change in Unrealized Gains/(Losses) Related to Financial Instruments Still Held	(409)	(376)	605
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Gross Derivative Assets	351,600	631,100
Gross Derivative Liabilities	346,000	628,300
Federal funds purchased and securities loaned or sold under agreements to repurchase
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning	(359)	(335)	0
Total Realized/Unrealized Gains/(Losses)	(5)	(11)	(11)
Gains (Losses) in OCI	0	0	0
Purchases	0	0	0
Sales	0	0	0
Issuances	(12)	(22)	(131)
Settlements	171	27	217
Gross Transfers into Level 3	(58)	(19)	(411)
Gross Transfers out of Level 3	263	1	1
Balance, ending	0	(359)	(335)
Change in Unrealized Gains/(Losses) Related to Financial Instruments Still Held	0	4	0
Corporate securities, trading loans and other
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning	(27)	(21)	(36)
Total Realized/Unrealized Gains/(Losses)	14	5	19
Gains (Losses) in OCI	0	0	0
Purchases	8	0	30
Sales	(17)	(11)	(34)
Issuances	(2)	0	0
Settlements	0	0	0
Gross Transfers into Level 3	0	0	0
Gross Transfers out of Level 3	0	0	0
Balance, ending	(24)	(27)	(21)
Change in Unrealized Gains/(Losses) Related to Financial Instruments Still Held	2	4	(3)
Short-term borrowings
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning	0	(30)	0
Total Realized/Unrealized Gains/(Losses)		1	17
Gains (Losses) in OCI		0	0
Purchases		0	0
Sales		0	0
Issuances		0	(52)
Settlements		29	10
Gross Transfers into Level 3		0	(24)
Gross Transfers out of Level 3		0	19
Balance, ending		0	(30)
Change in Unrealized Gains/(Losses) Related to Financial Instruments Still Held		0	1
Accrued expenses and other liabilities
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning	(9)	(9)	(10)
Total Realized/Unrealized Gains/(Losses)	0	0	1
Gains (Losses) in OCI	0	0	0
Purchases	0	0	0
Sales	0	0	0
Issuances	0	0	0
Settlements	1	0	0
Gross Transfers into Level 3	0	0	0
Gross Transfers out of Level 3	0	0	0
Balance, ending	(8)	(9)	(9)
Change in Unrealized Gains/(Losses) Related to Financial Instruments Still Held	0	0	1
Long-term debt
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning	(1,514)	(1,513)	(2,362)
Total Realized/Unrealized Gains/(Losses)	(135)	(74)	287
Gains (Losses) in OCI	(31)	(20)	19
Purchases	84	140	616
Sales	0	0	0
Issuances	(288)	(521)	(188)
Settlements	514	948	273
Gross Transfers into Level 3	(711)	(939)	(1,592)
Gross Transfers out of Level 3	218	465	1,434
Balance, ending	(1,863)	(1,514)	(1,513)
Change in Unrealized Gains/(Losses) Related to Financial Instruments Still Held	(196)	(184)	255
Level 3 | Recurring
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Balance, beginning	(1,313)
Balance, ending	(1,714)	(1,313)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Gross Derivative Assets	4,067	3,931	5,100
Gross Derivative Liabilities	5,781	5,244	5,600
Corporate securities, trading loans and other
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning	2,777	2,838	3,270
Total Realized/Unrealized Gains/(Losses)	229	78	(31)
Gains (Losses) in OCI	0	2	(11)
Purchases	547	1,508	1,540
Sales	(702)	(847)	(1,616)
Issuances	5	0	0
Settlements	(666)	(725)	(1,122)
Gross Transfers into Level 3	728	728	1,570
Gross Transfers out of Level 3	(1,054)	(805)	(762)
Balance, ending	1,864	2,777	2,838
Change in Unrealized Gains/(Losses) Related to Financial Instruments Still Held	2	(82)	(123)
Equity securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning	281	407	352
Total Realized/Unrealized Gains/(Losses)	18	74	9
Gains (Losses) in OCI	0	0	0
Purchases	55	73	49
Sales	(70)	(169)	(11)
Issuances	0	0	0
Settlements	(10)	(82)	(11)
Gross Transfers into Level 3	146	70	41
Gross Transfers out of Level 3	(185)	(92)	(22)
Balance, ending	235	281	407
Change in Unrealized Gains/(Losses) Related to Financial Instruments Still Held	(1)	(59)	3
Non-U.S. sovereign debt
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning	510	521	574
Total Realized/Unrealized Gains/(Losses)	74	122	114
Gains (Losses) in OCI	(8)	91	(179)
Purchases	53	12	185
Sales	(59)	(146)	(1)
Issuances	0	0	0
Settlements	(73)	(90)	(145)
Gross Transfers into Level 3	72	0	0
Gross Transfers out of Level 3	(13)	0	(27)
Balance, ending	556	510	521
Change in Unrealized Gains/(Losses) Related to Financial Instruments Still Held	70	120	74
Mortgage trading loans, ABS and other MBS
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning	1,211	1,868	2,063
Total Realized/Unrealized Gains/(Losses)	165	188	154
Gains (Losses) in OCI	(2)	(2)	1
Purchases	1,210	988	1,250
Sales	(990)	(1,491)	(1,117)
Issuances	0	0	0
Settlements	(233)	(344)	(493)
Gross Transfers into Level 3	218	158	50
Gross Transfers out of Level 3	(81)	(154)	(40)
Balance, ending	1,498	1,211	1,868
Change in Unrealized Gains/(Losses) Related to Financial Instruments Still Held	72	64	(93)
Trading Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning	4,779	5,634	6,259
Total Realized/Unrealized Gains/(Losses)	486	462	246
Gains (Losses) in OCI	(10)	91	(189)
Purchases	1,865	2,581	3,024
Sales	(1,821)	(2,653)	(2,745)
Issuances	5	0	0
Settlements	(982)	(1,241)	(1,771)
Gross Transfers into Level 3	1,164	956	1,661
Gross Transfers out of Level 3	(1,333)	(1,051)	(851)
Balance, ending	4,153	4,779	5,634
Change in Unrealized Gains/(Losses) Related to Financial Instruments Still Held	143	43	(139)
Non-agency residential MBS
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning	0	106	279
Total Realized/Unrealized Gains/(Losses)		0	(12)
Gains (Losses) in OCI		0	0
Purchases		0	134
Sales		(106)	0
Issuances		0	0
Settlements		0	(425)
Gross Transfers into Level 3		0	167
Gross Transfers out of Level 3		0	(37)
Balance, ending		0	106
Change in Unrealized Gains/(Losses) Related to Financial Instruments Still Held		0	0
Non-U.S. securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning	229	0	10
Total Realized/Unrealized Gains/(Losses)	2	0	0
Gains (Losses) in OCI	16	(6)	0
Purchases	49	584	0
Sales	0	(92)	0
Issuances	0	0	0
Settlements	(271)	(263)	(10)
Gross Transfers into Level 3	0	6	0
Gross Transfers out of Level 3	0	0	0
Balance, ending	25	229	0
Change in Unrealized Gains/(Losses) Related to Financial Instruments Still Held	0	0	0
Other taxable securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning	594	757	1,667
Total Realized/Unrealized Gains/(Losses)	4	4	0
Gains (Losses) in OCI	8	(2)	0
Purchases	5	0	189
Sales	0	0	0
Issuances	0	0	0
Settlements	(42)	(83)	(160)
Gross Transfers into Level 3	34	0	0
Gross Transfers out of Level 3	(94)	(82)	(939)
Balance, ending	509	594	757
Change in Unrealized Gains/(Losses) Related to Financial Instruments Still Held	0	0	0
Tax-exempt securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning	542	569	599
Total Realized/Unrealized Gains/(Losses)	1	0	0
Gains (Losses) in OCI	3	(1)	0
Purchases	14	1	0
Sales	(70)	0	0
Issuances	0	0	0
Settlements	(11)	(2)	(30)
Gross Transfers into Level 3	35	10	0
Gross Transfers out of Level 3	(45)	(35)	0
Balance, ending	469	542	569
Change in Unrealized Gains/(Losses) Related to Financial Instruments Still Held	0	0	0
Available-for-sale Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning	1,365	1,432	2,555
Total Realized/Unrealized Gains/(Losses)	7	4	(12)
Gains (Losses) in OCI	27	(9)	0
Purchases	68	585	323
Sales	(70)	(198)	0
Issuances	0	0	0
Settlements	(324)	(348)	(625)
Gross Transfers into Level 3	69	16	167
Gross Transfers out of Level 3	(139)	(117)	(976)
Balance, ending	1,003	1,365	1,432
Change in Unrealized Gains/(Losses) Related to Financial Instruments Still Held	0	0	0
Other debt securities carried at fair value – Non-agency residential MBS
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning	25	30	0
Total Realized/Unrealized Gains/(Losses)	(1)	(5)	(3)
Gains (Losses) in OCI	0	0	0
Purchases	0	0	33
Sales	(21)	0	0
Issuances	0	0	0
Settlements	(3)	0	0
Gross Transfers into Level 3	0	0	0
Gross Transfers out of Level 3	0	0	0
Balance, ending	0	25	30
Change in Unrealized Gains/(Losses) Related to Financial Instruments Still Held	0	0	0
Loans and leases
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning	720	1,620	1,983
Total Realized/Unrealized Gains/(Losses)	15	(44)	(23)
Gains (Losses) in OCI	0	0	0
Purchases	3	69	0
Sales	(34)	(553)	(4)
Issuances	0	50	57
Settlements	(126)	(194)	(237)
Gross Transfers into Level 3	0	6	144
Gross Transfers out of Level 3	(7)	(234)	(300)
Balance, ending	571	720	1,620
Change in Unrealized Gains/(Losses) Related to Financial Instruments Still Held	11	17	13
Mortgage servicing rights
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning	2,747	3,087	3,530
Total Realized/Unrealized Gains/(Losses)	70	149	187
Gains (Losses) in OCI	0	0	0
Purchases	0	0	0
Sales	(25)	(80)	(393)
Issuances	258	411	637
Settlements	(748)	(820)	(874)
Gross Transfers into Level 3	0	0	0
Gross Transfers out of Level 3	0	0	0
Balance, ending	2,302	2,747	3,087
Change in Unrealized Gains/(Losses) Related to Financial Instruments Still Held	(248)	(107)	(85)
Loans Held-for-Sale
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning	656	787	173
Total Realized/Unrealized Gains/(Losses)	100	79	(51)
Gains (Losses) in OCI	(3)	50	(8)
Purchases	3	22	771
Sales	(189)	(256)	(203)
Issuances	0	0	61
Settlements	(346)	(93)	(61)
Gross Transfers into Level 3	501	173	203
Gross Transfers out of Level 3	(32)	(106)	(98)
Balance, ending	690	656	787
Change in Unrealized Gains/(Losses) Related to Financial Instruments Still Held	14	70	(39)
Other assets
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning	239	374	911
Total Realized/Unrealized Gains/(Losses)	74	(13)	(55)
Gains (Losses) in OCI	(57)	0	0
Purchases	2	38	11
Sales	(189)	(111)	(130)
Issuances	0	0	0
Settlements	(10)	(52)	(51)
Gross Transfers into Level 3	64	3	10
Gross Transfers out of Level 3	0	0	(322)
Balance, ending	123	239	374
Change in Unrealized Gains/(Losses) Related to Financial Instruments Still Held	$ 22	$ (36)	$ (61)

Fair Value Measurements - Re171

Fair Value Measurements - Recurring Fair Value Inputs (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Net derivative asset (liability)	$ (1,714,000,000)	$ (1,313,000,000)	$ (441,000,000)	$ (920,000,000)
Recurring
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, fair value	645,590,000,000	614,410,000,000
Long-term debt	(208,238,000,000)	(185,699,000,000)
Recurring | Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, fair value	12,909,000,000	14,462,000,000
Long-term debt	(7,676,000,000)	(7,153,000,000)
Net derivative asset (liability)	$ (1,714,000,000)	$ (1,313,000,000)
Recurring | Level 3 | Discounted cash flow, Market comparables, Industry standard derivative pricing
Fair Value Inputs [Abstract]
Yield	7.50%
Recurring | Level 3 | Minimum | Discounted cash flow, Market comparables, Industry standard derivative pricing
Fair Value Inputs [Abstract]
Yield		6.00%
Price (in dollars per share)	$ 0	$ 12
Duration		0 years
Equity correlation	15.00%	13.00%
Long-dated equity volatilities	4.00%	4.00%
Recurring | Level 3 | Maximum | Discounted cash flow, Market comparables, Industry standard derivative pricing
Fair Value Inputs [Abstract]
Yield		37.00%
Price (in dollars per share)	$ 100	$ 87
Duration		5 years
Equity correlation	100.00%	100.00%
Long-dated equity volatilities	84.00%	76.00%
Recurring | Level 3 | Weighted Average | Discounted cash flow, Market comparables, Industry standard derivative pricing
Fair Value Inputs [Abstract]
Yield		20.00%
Price (in dollars per share)	$ 66	$ 73
Duration		3 years
Equity correlation	63.00%	68.00%
Long-dated equity volatilities	22.00%	26.00%
Recurring | Level 3 | Loans and leases
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, fair value	$ 571,000,000	$ 720,000,000
Recurring | Level 3 | Loans Held-for-Sale
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, fair value	690,000,000	656,000,000
Recurring | Level 3 | Credit derivatives
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Net derivative asset (liability)	$ (282,000,000)	$ (129,000,000)
Recurring | Level 3 | Credit derivatives | Discounted cash flow, Stochastic recovery correlation model
Fair Value Inputs [Abstract]
Loss severity	35.00%	35.00%
Recurring | Level 3 | Credit derivatives | Minimum | Discounted cash flow, Stochastic recovery correlation model
Fair Value Inputs [Abstract]
Yield	1.00%	0.00%
Prepayment speed	15.00%	10.00%
Default rate	1.00%	1.00%
Price (in dollars per share)	$ 0
Upfront points	0.00%	0.00%
Credit spreads		0.17%
Credit correlation	35.00%	21.00%
Recurring | Level 3 | Credit derivatives | Maximum | Discounted cash flow, Stochastic recovery correlation model
Fair Value Inputs [Abstract]
Yield	5.00%	24.00%
Prepayment speed	20.00%	20.00%
Default rate	4.00%	4.00%
Price (in dollars per share)	$ 102
Upfront points	1.00%	1.00%
Credit spreads		8.14%
Credit correlation	83.00%	80.00%
Recurring | Level 3 | Credit derivatives | Weighted Average | Discounted cash flow, Stochastic recovery correlation model
Fair Value Inputs [Abstract]
Yield	3.00%	13.00%
Prepayment speed	16.00%	18.00%
Default rate	2.00%	3.00%
Price (in dollars per share)	$ 82
Upfront points	0.71%	0.72%
Credit spreads		2.48%
Credit correlation	42.00%	44.00%
Recurring | Level 3 | Equity contracts
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Net derivative asset (liability)	$ (2,059,000,000)	$ (1,690,000,000)
Recurring | Level 3 | Equity contracts | Minimum | Industry standard derivative pricing
Fair Value Inputs [Abstract]
Equity correlation	15.00%	13.00%
Long-dated equity volatilities	4.00%	4.00%
Recurring | Level 3 | Equity contracts | Maximum | Industry standard derivative pricing
Fair Value Inputs [Abstract]
Equity correlation	100.00%	100.00%
Long-dated equity volatilities	84.00%	76.00%
Recurring | Level 3 | Equity contracts | Weighted Average | Industry standard derivative pricing
Fair Value Inputs [Abstract]
Equity correlation	63.00%	68.00%
Long-dated equity volatilities	22.00%	26.00%
Recurring | Level 3 | Commodity contracts
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Net derivative asset (liability)	$ (3,000,000)	$ 6,000,000
Recurring | Level 3 | Commodity contracts | Minimum | Discounted cash flow, Industry standard derivative pricing
Fair Value Inputs [Abstract]
Long-dated equity volatilities	26.00%	23.00%
Natural gas forward price	$ 1	$ 2
Correlation	71.00%	66.00%
Recurring | Level 3 | Commodity contracts | Maximum | Discounted cash flow, Industry standard derivative pricing
Fair Value Inputs [Abstract]
Long-dated equity volatilities	132.00%	96.00%
Natural gas forward price	$ 5	$ 6
Correlation	87.00%	95.00%
Recurring | Level 3 | Commodity contracts | Weighted Average | Discounted cash flow, Industry standard derivative pricing
Fair Value Inputs [Abstract]
Long-dated equity volatilities	57.00%	36.00%
Natural gas forward price	$ 3	$ 4
Correlation	81.00%	85.00%
Recurring | Level 3 | Interest rate contracts
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Net derivative asset (liability)	$ 630,000,000	$ 500,000,000
Recurring | Level 3 | Interest rate contracts | Minimum | Industry standard derivative pricing
Fair Value Inputs [Abstract]
Correlation (IR/IR)	15.00%	15.00%
Correlation (FX/IR)	0.00%	0.00%
Illiquid IR and long-dated inflation rates	(14.00%)	(12.00%)
Long-dated inflation volatilities	0.00%	0.00%
Recurring | Level 3 | Interest rate contracts | Maximum | Industry standard derivative pricing
Fair Value Inputs [Abstract]
Correlation (IR/IR)	92.00%	99.00%
Correlation (FX/IR)	46.00%	40.00%
Illiquid IR and long-dated inflation rates	38.00%	35.00%
Long-dated inflation volatilities	1.00%	2.00%
Recurring | Level 3 | Interest rate contracts | Weighted Average | Industry standard derivative pricing
Fair Value Inputs [Abstract]
Correlation (IR/IR)	50.00%	56.00%
Correlation (FX/IR)	1.00%	2.00%
Illiquid IR and long-dated inflation rates	4.00%	5.00%
Long-dated inflation volatilities	1.00%	1.00%
Recurring | Level 3 | Long-term debt
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Long-term debt	$ (1,863,000,000)	$ (1,514,000,000)
Recurring | Level 3 | Mortgage trading loans, ABS and other MBS
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, fair value	1,500,000,000	1,200,000,000
Recurring | Level 3 | Corporate securities, trading loans and other
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, fair value	1,900,000,000	2,800,000,000
Recurring | Level 3 | Non-U.S. sovereign debt
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, fair value	556,000,000	510,000,000
Recurring | Level 3 | Other taxable securities
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, fair value	509,000,000	594,000,000
Recurring | Level 3 | Tax-exempt securities
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, fair value	469,000,000	542,000,000
Recurring | Level 3 | Instruments backed by residential real estate assets
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, fair value	$ 871,000,000	$ 1,066,000,000
Recurring | Level 3 | Instruments backed by residential real estate assets | Minimum | Discounted cash flow, Stochastic recovery correlation model
Fair Value Inputs [Abstract]
Yield	0.00%
Prepayment speed	0.00%
Default rate	0.00%
Loss severity	0.00%
Recurring | Level 3 | Instruments backed by residential real estate assets | Minimum | Discounted cash flow, Market comparables
Fair Value Inputs [Abstract]
Yield		0.00%
Prepayment speed		0.00%
Default rate		0.00%
Loss severity		0.00%
Recurring | Level 3 | Instruments backed by residential real estate assets | Maximum | Discounted cash flow, Stochastic recovery correlation model
Fair Value Inputs [Abstract]
Yield	25.00%
Prepayment speed	22.00%
Default rate	3.00%
Loss severity	53.00%
Recurring | Level 3 | Instruments backed by residential real estate assets | Maximum | Discounted cash flow, Market comparables
Fair Value Inputs [Abstract]
Yield		50.00%
Prepayment speed		27.00%
Default rate		3.00%
Loss severity		54.00%
Recurring | Level 3 | Instruments backed by residential real estate assets | Weighted Average | Discounted cash flow, Stochastic recovery correlation model
Fair Value Inputs [Abstract]
Yield	6.00%
Prepayment speed	12.00%
Default rate	1.00%
Loss severity	17.00%
Recurring | Level 3 | Instruments backed by residential real estate assets | Weighted Average | Discounted cash flow, Market comparables
Fair Value Inputs [Abstract]
Yield		7.00%
Prepayment speed		14.00%
Default rate		2.00%
Loss severity		18.00%
Recurring | Level 3 | Instruments backed by residential real estate assets | Loans and leases
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, fair value	$ 570,000,000	$ 718,000,000
Recurring | Level 3 | Instruments backed by residential real estate assets | Loans Held-for-Sale
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, fair value	3,000,000	11,000,000
Recurring | Level 3 | Instruments backed by residential real estate assets | Mortgage trading loans, ABS and other MBS | Trading Securities
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, fair value	298,000,000	337,000,000
Recurring | Level 3 | Instruments backed by commercial real estate assets
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, fair value	$ 286,000,000	$ 317,000,000
Recurring | Level 3 | Instruments backed by commercial real estate assets | Minimum | Discounted cash flow, Stochastic recovery correlation model
Fair Value Inputs [Abstract]
Yield	0.00%
Price (in dollars per share)	$ 0
Recurring | Level 3 | Instruments backed by commercial real estate assets | Minimum | Discounted cash flow, Market comparables
Fair Value Inputs [Abstract]
Yield		0.00%
Price (in dollars per share)		$ 0
Recurring | Level 3 | Instruments backed by commercial real estate assets | Maximum | Discounted cash flow, Stochastic recovery correlation model
Fair Value Inputs [Abstract]
Yield	25.00%
Price (in dollars per share)	$ 100
Recurring | Level 3 | Instruments backed by commercial real estate assets | Maximum | Discounted cash flow, Market comparables
Fair Value Inputs [Abstract]
Yield		39.00%
Price (in dollars per share)		$ 100
Recurring | Level 3 | Instruments backed by commercial real estate assets | Weighted Average | Discounted cash flow, Stochastic recovery correlation model
Fair Value Inputs [Abstract]
Yield	9.00%
Price (in dollars per share)	$ 67
Recurring | Level 3 | Instruments backed by commercial real estate assets | Weighted Average | Discounted cash flow, Market comparables
Fair Value Inputs [Abstract]
Yield		11.00%
Price (in dollars per share)		$ 65
Recurring | Level 3 | Instruments backed by commercial real estate assets | Loans Held-for-Sale
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, fair value		$ 86,000,000
Recurring | Level 3 | Instruments backed by commercial real estate assets | Mortgage trading loans, ABS and other MBS
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, fair value	$ 42,000,000	53,000,000
Recurring | Level 3 | Instruments backed by commercial real estate assets | Corporate securities, trading loans and other
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, fair value	244,000,000	178,000,000
Recurring | Level 3 | Commercial loans, debt securities and other
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, fair value	$ 4,023,000,000	$ 4,486,000,000
Recurring | Level 3 | Commercial loans, debt securities and other | Discounted cash flow, Market comparables
Fair Value Inputs [Abstract]
Enterprise value/EBITDA multiple		34
Recurring | Level 3 | Commercial loans, debt securities and other | Minimum | Discounted cash flow, Market comparables
Fair Value Inputs [Abstract]
Yield	0.00%	1.00%
Prepayment speed	10.00%	5.00%
Default rate	3.00%	3.00%
Loss severity	35.00%	0.00%
Price (in dollars per share)	$ 0	$ 0
Duration		0 years
Recurring | Level 3 | Commercial loans, debt securities and other | Maximum | Discounted cash flow, Market comparables
Fair Value Inputs [Abstract]
Yield	12.00%	37.00%
Prepayment speed	20.00%	20.00%
Default rate	4.00%	4.00%
Loss severity	40.00%	50.00%
Price (in dollars per share)	$ 145	$ 292
Duration		5 years
Recurring | Level 3 | Commercial loans, debt securities and other | Weighted Average | Discounted cash flow, Market comparables
Fair Value Inputs [Abstract]
Yield	5.00%	14.00%
Prepayment speed	16.00%	19.00%
Default rate	4.00%	4.00%
Loss severity	37.00%	19.00%
Price (in dollars per share)	$ 63	$ 68
Duration		3 years
Recurring | Level 3 | Commercial loans, debt securities and other | Available-for-sale Securities
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, fair value	$ 8,000,000
Recurring | Level 3 | Commercial loans, debt securities and other | Loans and leases
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, fair value	1,000,000	$ 2,000,000
Recurring | Level 3 | Commercial loans, debt securities and other | Loans Held-for-Sale
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, fair value	687,000,000	559,000,000
Recurring | Level 3 | Commercial loans, debt securities and other | Mortgage trading loans, ABS and other MBS | Trading Securities
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, fair value	1,158,000,000	821,000,000
Recurring | Level 3 | Commercial loans, debt securities and other | Corporate securities, trading loans and other | Trading Securities
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, fair value	1,613,000,000	2,565,000,000
Recurring | Level 3 | Commercial loans, debt securities and other | Non-U.S. sovereign debt | Trading Securities
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, fair value	556,000,000	510,000,000
Recurring | Level 3 | Commercial loans, debt securities and other | Other taxable securities | Available-for-sale Securities
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, fair value		29,000,000
Recurring | Level 3 | Auction rate securities
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, fair value	$ 977,000,000	$ 1,141,000,000
Recurring | Level 3 | Auction rate securities | Minimum | Discounted cash flow, Market comparables
Fair Value Inputs [Abstract]
Price (in dollars per share)	$ 10	$ 10
Recurring | Level 3 | Auction rate securities | Maximum | Discounted cash flow, Market comparables
Fair Value Inputs [Abstract]
Price (in dollars per share)	100	100
Recurring | Level 3 | Auction rate securities | Weighted Average | Discounted cash flow, Market comparables
Fair Value Inputs [Abstract]
Price (in dollars per share)	$ 94	$ 94
Recurring | Level 3 | Auction rate securities | Corporate securities, trading loans and other | Trading Securities
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, fair value	$ 7,000,000	$ 34,000,000
Recurring | Level 3 | Auction rate securities | Other taxable securities | Available-for-sale Securities
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, fair value	501,000,000	565,000,000
Recurring | Level 3 | Auction rate securities | Tax-exempt securities | Available-for-sale Securities
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, fair value	469,000,000	542,000,000
Recurring | Level 3 | MSRs
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, fair value	$ 2,302,000,000	$ 2,747,000,000
Recurring | Level 3 | MSRs | Minimum | Discounted cash flow, Stochastic recovery correlation model
Fair Value Inputs [Abstract]
Weighted-average life, fixed rate	0 years	0 years
Weighted-average life, variable rate	0 years	0 years
Option Adjusted Spread, fixed rate	9.00%	9.00%
Option Adjusted Spread, variable rate	9.00%	9.00%
Recurring | Level 3 | MSRs | Maximum | Discounted cash flow, Stochastic recovery correlation model
Fair Value Inputs [Abstract]
Weighted-average life, fixed rate	14 years	15 years
Weighted-average life, variable rate	10 years	14 years
Option Adjusted Spread, fixed rate	14.00%	14.00%
Option Adjusted Spread, variable rate	15.00%	15.00%
Recurring | Level 3 | MSRs | Weighted Average | Discounted cash flow, Stochastic recovery correlation model
Fair Value Inputs [Abstract]
Weighted-average life, fixed rate	5 years	6 years
Weighted-average life, variable rate	3 years	4 years
Option Adjusted Spread, fixed rate	10.00%	10.00%
Option Adjusted Spread, variable rate	12.00%	12.00%

Fair Value Measurements - Mortg

Fair Value Measurements - Mortgage Servicing Rights (Details) $ in Millions	Dec. 31, 2017USD ($)
Fair Value Disclosures [Abstract]
Impact of 10 percent decrease in prepayment speed	$ 83
Impact of 20 percent decrease in prepayment speed	172
Impact of 10 percent increase in prepayment speed	(76)
Impact of 20 percent increase in prepayment speed	(147)
Impact of 100 basis points decrease in option adjusted spread	69
Impact of 200 basis points decrease in option adjusted spread	143
Impact of 100 basis points increase in option adjusted spread	(65)
Impact of 200 basis points increase in option adjusted spread	$ (125)

Fair Value Measurements - Nonre

Fair Value Measurements - Nonrecurring Fair Value (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis
Loans held-for-sale, measured at fair value	$ 2,156	$ 4,026
Loans and leases, measured at fair value	5,710	7,085
Other assets, measured at fair value	20,279	13,802
Nonrecurring
Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis
Gains (Losses) on loans held-for-sale	(6)	(54)	$ (8)
Gains (Losses) on loans and leases	(336)	(458)	(993)
Gains (Losses) on foreclosed properties	(41)	(41)	(57)
Gains (Losses) on other assets	(124)	(74)	(28)
Loss on loans and leases written down to zero	135	150	$ 174
Nonrecurring | Government Guaranteed Mortgage Loans upon Foreclosure Receivable
Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis
Foreclosed properties, measured at fair value	801	1,200
Nonrecurring | Level 2
Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis
Loans held-for-sale, measured at fair value	0	193
Loans and leases, measured at fair value	0	0
Foreclosed properties, measured at fair value	0	0
Other assets, measured at fair value	425	358
Nonrecurring | Level 3
Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis
Loans held-for-sale, measured at fair value	2	44
Loans and leases, measured at fair value	894	1,416
Foreclosed properties, measured at fair value	83	77
Other assets, measured at fair value	$ 0	$ 0

Fair Value Measurements - No174

Fair Value Measurements - Nonrecurring Fair Value Inputs (Details) - Nonrecurring - Level 3 - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Market Comparables | Minimum
Fair Value Inputs [Abstract]
OREO discount	15.00%	8.00%
Costs to sell	5.00%	7.00%
Market Comparables | Maximum
Fair Value Inputs [Abstract]
OREO discount	58.00%	56.00%
Costs to sell	49.00%	45.00%
Instruments backed by residential real estate assets
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, fair value	$ 894	$ 1,416
Instruments backed by residential real estate assets | Market Comparables | Weighted Average
Fair Value Inputs [Abstract]
OREO discount	23.00%	21.00%
Costs to sell	7.00%	9.00%

Fair Value Option - Elections (

Fair Value Option - Elections (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Federal funds sold and securities borrowed or purchased under agreements to resell
Fair Value Carrying Amount
Assets	$ 52,906	$ 49,750
Contractual Principal Outstanding
Assets	52,907	49,615
Fair Value Carrying Amount Less Unpaid Principal
Assets	(1)	135
Loans reported as trading account assets
Fair Value Carrying Amount
Assets	5,735	6,215
Contractual Principal Outstanding
Assets	11,804	11,557
Fair Value Carrying Amount Less Unpaid Principal
Assets	(6,069)	(5,342)
Trading inventory – other
Fair Value Carrying Amount
Assets	12,027	8,206
Consumer and commercial loans
Fair Value Carrying Amount
Assets	5,710	7,085
Contractual Principal Outstanding
Assets	5,744	7,190
Fair Value Carrying Amount Less Unpaid Principal
Assets	(34)	(105)
Loans held-for-sale
Fair Value Carrying Amount
Assets	2,156	4,026
Contractual Principal Outstanding
Assets	3,717	5,595
Fair Value Carrying Amount Less Unpaid Principal
Assets	(1,561)	(1,569)
Customer receivables and other assets
Fair Value Carrying Amount
Assets	3	253
Contractual Principal Outstanding
Assets		250
Fair Value Carrying Amount Less Unpaid Principal
Assets		3
Long-term deposits
Fair Value Carrying Amount
Liabilities	449	731
Contractual Principal Outstanding
Liabilities	421	672
Fair Value Carrying Amount Less Unpaid Principal
Liabilities	28	59
Federal funds purchased and securities loaned or sold under agreements to repurchase
Fair Value Carrying Amount
Liabilities	36,182	35,766
Contractual Principal Outstanding
Liabilities	36,187	35,929
Fair Value Carrying Amount Less Unpaid Principal
Liabilities	(5)	(163)
Short-term borrowings
Fair Value Carrying Amount
Liabilities	1,494	2,024
Contractual Principal Outstanding
Liabilities	1,494	2,024
Fair Value Carrying Amount Less Unpaid Principal
Liabilities	0	0
Unfunded loan commitments
Fair Value Carrying Amount
Liabilities	120	173
Long-term debt
Fair Value Carrying Amount
Liabilities	31,786	30,037
Contractual Principal Outstanding
Liabilities	31,512	29,862
Fair Value Carrying Amount Less Unpaid Principal
Liabilities	274	175
Structured liabilities
Fair Value Carrying Amount
Liabilities	31,400	29,700
Contractual Principal Outstanding
Liabilities	$ 31,100	$ 29,500

Fair Value Option - Gains (Loss

Fair Value Option - Gains (Losses) Relating to Assets and Liabilities (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (losses) relating to assets and liabilities accounted for under the fair value option	$ 3,229	$ 774	$ 2,671
Federal funds sold and securities borrowed or purchased under agreements to resell
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (losses) relating to assets and liabilities accounted for under the fair value option	(57)	(63)	(195)
Loans reported as trading account assets
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (losses) relating to assets and liabilities accounted for under the fair value option	318	301	(199)
Trading inventory – other
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (losses) relating to assets and liabilities accounted for under the fair value option	3,821	57	1,284
Consumer and commercial loans
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (losses) relating to assets and liabilities accounted for under the fair value option	26	12	(243)
Loans held-for-sale
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (losses) relating to assets and liabilities accounted for under the fair value option	298	535	700
Unfunded loan commitments
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (losses) relating to assets and liabilities accounted for under the fair value option	36	487	(210)
Long-term debt
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (losses) relating to assets and liabilities accounted for under the fair value option	(1,190)	(586)	1,474
Other
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (losses) relating to assets and liabilities accounted for under the fair value option	(23)	31	60
Trading Account Profits
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (losses) relating to assets and liabilities accounted for under the fair value option	2,993	(156)	3,050
Trading Account Profits | Federal funds sold and securities borrowed or purchased under agreements to resell
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (losses) relating to assets and liabilities accounted for under the fair value option	(57)	(64)	(195)
Trading Account Profits | Loans reported as trading account assets
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (losses) relating to assets and liabilities accounted for under the fair value option	318	301	(199)
Trading Account Profits | Trading inventory – other
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (losses) relating to assets and liabilities accounted for under the fair value option	3,821	57	1,284
Trading Account Profits | Consumer and commercial loans
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (losses) relating to assets and liabilities accounted for under the fair value option	(9)	49	52
Trading Account Profits | Loans held-for-sale
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (losses) relating to assets and liabilities accounted for under the fair value option	0	11	(36)
Trading Account Profits | Unfunded loan commitments
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (losses) relating to assets and liabilities accounted for under the fair value option	0	0	0
Trading Account Profits | Long-term debt
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (losses) relating to assets and liabilities accounted for under the fair value option	(1,044)	(489)	2,107
Trading Account Profits | Other
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (losses) relating to assets and liabilities accounted for under the fair value option	(36)	(21)	37
Mortgage Banking Income
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (losses) relating to assets and liabilities accounted for under the fair value option	211	518	673
Mortgage Banking Income | Federal funds sold and securities borrowed or purchased under agreements to resell
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (losses) relating to assets and liabilities accounted for under the fair value option	0	0	0
Mortgage Banking Income | Loans reported as trading account assets
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (losses) relating to assets and liabilities accounted for under the fair value option	0	0	0
Mortgage Banking Income | Trading inventory – other
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (losses) relating to assets and liabilities accounted for under the fair value option	0	0	0
Mortgage Banking Income | Consumer and commercial loans
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (losses) relating to assets and liabilities accounted for under the fair value option	0	0	0
Mortgage Banking Income | Loans held-for-sale
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (losses) relating to assets and liabilities accounted for under the fair value option	211	518	673
Mortgage Banking Income | Unfunded loan commitments
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (losses) relating to assets and liabilities accounted for under the fair value option	0	0	0
Mortgage Banking Income | Long-term debt
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (losses) relating to assets and liabilities accounted for under the fair value option	0	0	0
Mortgage Banking Income | Other
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (losses) relating to assets and liabilities accounted for under the fair value option	0	0	0
Other Income
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (losses) relating to assets and liabilities accounted for under the fair value option	25	412	(1,052)
Other Income | Federal funds sold and securities borrowed or purchased under agreements to resell
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (losses) relating to assets and liabilities accounted for under the fair value option	0	1	0
Other Income | Loans reported as trading account assets
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (losses) relating to assets and liabilities accounted for under the fair value option	0	0	0
Other Income | Trading inventory – other
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (losses) relating to assets and liabilities accounted for under the fair value option	0	0	0
Other Income | Consumer and commercial loans
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (losses) relating to assets and liabilities accounted for under the fair value option	35	(37)	(295)
Other Income | Loans held-for-sale
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (losses) relating to assets and liabilities accounted for under the fair value option	87	6	63
Other Income | Unfunded loan commitments
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (losses) relating to assets and liabilities accounted for under the fair value option	36	487	(210)
Other Income | Long-term debt
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (losses) relating to assets and liabilities accounted for under the fair value option	(146)	(97)	(633)
Other Income | Other
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (losses) relating to assets and liabilities accounted for under the fair value option	$ 13	$ 52	$ 23

Fair Value Option - Gains (L177

Fair Value Option - Gains (Losses) Related to Borrower-specific Credit Risk (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Loans reported as trading account assets
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (losses) related to borrower-specific credit risk for assets accounted for under the fair value option	$ 24	$ 7	$ 37
Consumer and commercial loans
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (losses) related to borrower-specific credit risk for assets accounted for under the fair value option	36	(53)	(200)
Loans held-for-sale
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (losses) related to borrower-specific credit risk for assets accounted for under the fair value option	$ (22)	$ (34)	$ 37

Fair Value of Financial Inst178

Fair Value of Financial Instruments (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Financial assets
Loans held-for-sale	$ 2,156	$ 4,026
Financial liabilities
Long-term debt	31,786	30,037
Carrying Value
Financial assets
Loans	904,399	873,209
Loans held-for-sale	11,430	9,066
Financial liabilities
Deposits	1,309,545	1,260,934
Long-term debt	227,402	216,823
Commercial unfunded lending commitments	897	937
Estimate of Fair Value Measurement
Financial assets
Loans	918,162	887,122
Loans held-for-sale	11,430	9,066
Financial liabilities
Deposits	1,309,398	1,261,086
Long-term debt	236,989	221,585
Commercial unfunded lending commitments	4,000	4,900
Estimate of Fair Value Measurement | Level 2
Financial assets
Loans	68,586	71,793
Loans held-for-sale	10,521	8,082
Financial liabilities
Deposits	1,309,398	1,261,086
Long-term debt	235,126	220,071
Estimate of Fair Value Measurement | Level 3
Financial assets
Loans	849,576	815,329
Loans held-for-sale	909	984
Financial liabilities
Deposits	0	0
Long-term debt	$ 1,863	$ 1,514

Business Segment Information -

Business Segment Information - Narrative (Details)	12 Months Ended
	Dec. 31, 2017business_segment
Segment Reporting [Abstract]
Number of operating segments	4

Business Segment Information180

Business Segment Information - Results of Business Segments and All Other (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Segment Reporting Information [Line Items]
Net interest income (FTE basis)	$ 45,592	$ 41,996	$ 39,847
Noninterest income	42,685	42,605	44,007
Total revenue, net of interest expense (FTE basis)	88,277	84,601	83,854
Provision for credit losses	3,396	3,597	3,161
Noninterest expense	54,743	55,083	57,617
Income before income taxes (FTE basis)	30,138	25,921	23,076
Income tax expense (FTE basis)	11,906	8,099	7,166
Net income	18,232	17,822	15,910
Year-end total assets	2,281,234	2,188,067
Operating Segments
Segment Reporting Information [Line Items]
Total revenue, net of interest expense (FTE basis)	89,061	83,916	82,187
Net income	21,541	19,494	16,981
Year-end total assets	2,087,186	1,975,654
Operating Segments | Consumer Banking
Segment Reporting Information [Line Items]
Net interest income (FTE basis)	24,307	21,290	20,428
Noninterest income	10,214	10,441	11,091
Total revenue, net of interest expense (FTE basis)	34,521	31,731	31,519
Provision for credit losses	3,525	2,715	2,346
Noninterest expense	17,787	17,654	18,710
Income before income taxes (FTE basis)	13,209	11,362	10,463
Income tax expense (FTE basis)	5,002	4,190	3,814
Net income	8,207	7,172	6,649
Year-end total assets	749,325	702,333
Operating Segments | Global Wealth & Investment Management
Segment Reporting Information [Line Items]
Net interest income (FTE basis)	6,173	5,759	5,527
Noninterest income	12,417	11,891	12,507
Total revenue, net of interest expense (FTE basis)	18,590	17,650	18,034
Provision for credit losses	56	68	51
Noninterest expense	13,564	13,175	13,938
Income before income taxes (FTE basis)	4,970	4,407	4,045
Income tax expense (FTE basis)	1,882	1,632	1,475
Net income	3,088	2,775	2,570
Year-end total assets	284,321	298,931
Operating Segments | Global Banking
Segment Reporting Information [Line Items]
Net interest income (FTE basis)	10,504	9,471	9,244
Noninterest income	9,495	8,974	8,377
Total revenue, net of interest expense (FTE basis)	19,999	18,445	17,621
Provision for credit losses	212	883	686
Noninterest expense	8,596	8,486	8,482
Income before income taxes (FTE basis)	11,191	9,076	8,453
Income tax expense (FTE basis)	4,238	3,347	3,114
Net income	6,953	5,729	5,339
Year-end total assets	424,533	408,330
Operating Segments | Global Markets
Segment Reporting Information [Line Items]
Net interest income (FTE basis)	3,744	4,558	4,191
Noninterest income	12,207	11,532	10,822
Total revenue, net of interest expense (FTE basis)	15,951	16,090	15,013
Provision for credit losses	164	31	99
Noninterest expense	10,731	10,169	11,374
Income before income taxes (FTE basis)	5,056	5,890	3,540
Income tax expense (FTE basis)	1,763	2,072	1,117
Net income	3,293	3,818	2,423
Year-end total assets	629,007	566,060
All Other
Segment Reporting Information [Line Items]
Net interest income (FTE basis)	864	918	457
Noninterest income	(1,648)	(233)	1,210
Total revenue, net of interest expense (FTE basis)	(784)	685	1,667
Provision for credit losses	(561)	(100)	(21)
Noninterest expense	4,065	5,599	5,113
Income before income taxes (FTE basis)	(4,288)	(4,814)	(3,425)
Income tax expense (FTE basis)	(979)	(3,142)	(2,354)
Net income	(3,309)	(1,672)	$ (1,071)
Year-end total assets	$ 194,048	$ 212,413

Business Segment Information181

Business Segment Information - Business Segment Reconciliations (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Segments’ total revenue, net of interest expense (FTE basis)
Total revenue, net of interest expense (FTE basis)	$ 88,277	$ 84,601	$ 83,854
Total revenue, net of interest expense	87,352	83,701	82,965
Net income	18,232	17,822	15,910
Operating Segments
Segments’ total revenue, net of interest expense (FTE basis)
Total revenue, net of interest expense (FTE basis)	89,061	83,916	82,187
Net income	21,541	19,494	16,981
ALM activities
Segments’ total revenue, net of interest expense (FTE basis)
Total revenue, net of interest expense	312	(300)	(208)
Net income	(355)	(651)	(694)
Liquidating businesses and other
Segments’ total revenue, net of interest expense (FTE basis)
Total revenue, net of interest expense	(1,096)	985	1,875
Net income	(2,954)	(1,021)	(377)
FTE basis adjustment
Segments’ total revenue, net of interest expense (FTE basis)
Total revenue, net of interest expense	$ (925)	$ (900)	$ (889)

Business Segment Information182

Business Segment Information - Segments' Total Assets (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Segments’ total assets
Total assets	$ 2,281,234	$ 2,188,067
Operating Segments
Segments’ total assets
Total assets	2,087,186	1,975,654
ALM activities
Segments’ total assets
Total assets	625,488	612,996
Liquidating businesses and other
Segments’ total assets
Total assets	89,008	118,073
Elimination of segment asset allocations to match liabilities
Segments’ total assets
Total assets	$ (520,448)	$ (518,656)

Parent Company Information - In

Parent Company Information - Income Statement (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Condensed Income Statements, Captions [Line Items]
Other income	$ 1,917	$ 1,885	$ 1,783
Total revenue, net of interest expense	87,352	83,701	82,965
Noninterest expense	54,743	55,083	57,617
Income tax expense (benefit)	10,981	7,199	6,277
Net income	18,232	17,822	15,910
Bank of America Corporation
Condensed Income Statements, Captions [Line Items]
Interest from subsidiaries	7,043	2,996	2,004
Other income	28	111	(623)
Total revenue, net of interest expense	19,361	7,311	20,404
Interest on borrowed funds	189	969	1,169
Other interest expense	5,555	5,096	5,098
Noninterest expense	1,672	2,704	4,631
Total Expense	7,416	8,769	10,898
Income (loss) before income taxes and equity in undistributed earnings of subsidiaries	11,945	(1,458)	9,506
Income tax expense (benefit)	950	(2,311)	(3,532)
Income before equity in undistributed earnings of subsidiaries	10,995	853	13,038
Bank holding companies and related subsidiaries	7,237	16,969	2,872
Net income	18,232	17,822	15,910
Bank Holding Companies and Related Subsidiaries | Bank of America Corporation
Condensed Income Statements, Captions [Line Items]
Dividends from subsidiaries	12,088	4,127	18,970
Bank holding companies and related subsidiaries	8,725	16,817	3,068
Nonbank Companies and Related Subsidiaries | Bank of America Corporation
Condensed Income Statements, Captions [Line Items]
Dividends from subsidiaries	202	77	53
Bank holding companies and related subsidiaries	$ (1,488)	$ 152	$ (196)

Parent Company Information - Ba

Parent Company Information - Balance Sheet (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Assets
Cash held at bank subsidiaries	$ 157,434	$ 147,738	$ 159,353	$ 138,589
Securities	440,130	430,731
All other assets	132,741	123,996
Total assets	2,281,234	2,188,067
Liabilities and Equity [Abstract]
Accrued expenses and other liabilities	152,123	147,369
Long-term debt	227,402	216,823
Total liabilities	2,014,088	1,921,872
Shareholders’ equity	267,146	266,195	255,615	243,476
Total liabilities and shareholders’ equity	2,281,234	2,188,067
Bank of America Corporation
Assets
Cash held at bank subsidiaries	4,747	20,248	$ 98,024	$ 100,304
Securities	596	909
All other assets	14,554	11,038
Total assets	473,085	470,229
Liabilities and Equity [Abstract]
Accrued expenses and other liabilities	10,286	14,284
Long-term debt	185,953	173,375
Total liabilities	205,939	204,034
Shareholders’ equity	267,146	266,195
Total liabilities and shareholders’ equity	473,085	470,229
Third party cash held	193	342
Bank of America Corporation | Bank Holding Companies and Related Subsidiaries
Assets
Receivables from subsidiaries	146,566	117,072
Investments in subsidiaries	296,506	287,416
Liabilities and Equity [Abstract]
Payables to subsidiaries	1	4,013
Bank of America Corporation | Banks and Related Subsidiaries
Assets
Receivables from subsidiaries	146	171
Liabilities and Equity [Abstract]
Payables to subsidiaries	359	352
Bank of America Corporation | Nonbank Companies and Related Subsidiaries
Assets
Receivables from subsidiaries	4,745	26,500
Investments in subsidiaries	5,225	6,875
Liabilities and Equity [Abstract]
Payables to subsidiaries	$ 9,340	$ 12,010

Parent Company Information - St

Parent Company Information - Statement of Cash Flows (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Condensed Cash Flow Statements, Captions [Line Items]
Net income	$ 18,232	$ 17,822	$ 15,910
Operating activities
Other operating activities, net	7,424	1,331	(1,612)
Investing activities
Other investing activities, net	8,180	107	294
Financing activities
Net decrease in short-term borrowings	8,538	(4,014)	(3,074)
Proceeds from issuance of long-term debt	53,486	35,537	43,670
Retirement of long-term debt	(49,553)	(51,849)	(40,365)
Proceeds from issuance of preferred stock	0	2,947	2,964
Common stock repurchased	(12,814)	(5,112)	(2,374)
Cash dividends paid	(5,700)	(4,194)	(3,574)
Net increase (decrease) in cash and cash equivalents	9,696	(11,615)	20,764
Cash and cash equivalents at January 1	147,738	159,353	138,589
Cash and cash equivalents at December 31	157,434	147,738	159,353
Bank of America Corporation
Condensed Cash Flow Statements, Captions [Line Items]
Net income	18,232	17,822	15,910
Operating activities
Equity in undistributed (earnings) losses of subsidiaries	(7,237)	(16,969)	(2,872)
Other operating activities, net	(2,593)	(2,860)	(2,583)
Net cash provided by (used in) operating activities	8,402	(2,007)	10,455
Investing activities
Net sales of securities	312	0	15
Net payments to subsidiaries	(7,087)	(65,481)	(7,944)
Other investing activities, net	(1)	(308)	70
Net cash used in investing activities	(6,776)	(65,789)	(7,859)
Financing activities
Net decrease in short-term borrowings	0	(136)	(221)
Net decrease in other advances	(6,672)	(44)	(770)
Proceeds from issuance of long-term debt	37,704	27,363	26,492
Retirement of long-term debt	(29,645)	(30,804)	(27,393)
Proceeds from issuance of preferred stock	0	2,947	2,964
Common stock repurchased	(12,814)	(5,112)	(2,374)
Cash dividends paid	(5,700)	(4,194)	(3,574)
Net cash used in financing activities	(17,127)	(9,980)	(4,876)
Net increase (decrease) in cash and cash equivalents	(15,501)	(77,776)	(2,280)
Cash and cash equivalents at January 1	20,248	98,024	100,304
Cash and cash equivalents at December 31	$ 4,747	$ 20,248	$ 98,024

Performance by Geographical 186

Performance by Geographical Area (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Revenues from External Customers and Long-Lived Assets [Line Items]
Total assets	$ 2,281,234	$ 2,188,067
Total revenue, net of interest expense	87,352	83,701	$ 82,965
Income before income taxes	29,213	25,021	22,187
Net income	18,232	17,822	15,910
U.S.
Revenues from External Customers and Long-Lived Assets [Line Items]
Total assets	1,965,490	1,901,043
Total revenue, net of interest expense	74,830	72,418	72,117
Income before income taxes	25,108	22,282	20,181
Net income	15,550	16,183	14,711
Asia
Revenues from External Customers and Long-Lived Assets [Line Items]
Total assets	103,255	85,410
Total revenue, net of interest expense	3,405	3,365	3,524
Income before income taxes	676	674	726
Net income	464	488	457
Europe, Middle East and Africa
Revenues from External Customers and Long-Lived Assets [Line Items]
Total assets	189,661	174,934
Total revenue, net of interest expense	7,907	6,608	6,081
Income before income taxes	2,990	1,705	938
Net income	1,926	925	516
Latin America and the Caribbean
Revenues from External Customers and Long-Lived Assets [Line Items]
Total assets	22,828	26,680
Total revenue, net of interest expense	1,210	1,310	1,243
Income before income taxes	439	360	342
Net income	292	226	226
Total Non-U.S.
Revenues from External Customers and Long-Lived Assets [Line Items]
Total assets	315,744	287,024
Total revenue, net of interest expense	12,522	11,283	10,848
Income before income taxes	4,105	2,739	2,006
Net income	$ 2,682	$ 1,639	$ 1,199