Bank of America (BAC) 10-Q 30 Oct 17 2017 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2017	Oct. 27, 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-Q
Document Period End Date	Sep. 30, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	Q3
Amendment Flag	false
Entity Common Stock, Shares Outstanding		10,430,613,675

Consolidated Statement of Incom

Consolidated Statement of Income - USD ($) shares in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Interest income
Loans and leases	$ 9,203	$ 8,358	$ 26,877	$ 24,837
Debt securities	2,629	2,144	7,764	6,922
Federal funds sold and securities borrowed or purchased under agreements to resell	659	267	1,658	803
Trading account assets	1,091	1,076	3,330	3,330
Other interest income	1,075	765	2,884	2,300
Total interest income	14,657	12,610	42,513	38,192
Interest expense
Deposits	624	266	1,252	736
Short-term borrowings	944	569	2,508	1,808
Trading account liabilities	319	244	890	778
Long-term debt	1,609	1,330	4,658	4,066
Total interest expense	3,496	2,409	9,308	7,388
Net interest income	11,161	10,201	33,205	30,804
Noninterest income
Card income	1,429	1,455	4,347	4,349
Service charges	1,968	1,952	5,863	5,660
Investment and brokerage services	3,303	3,160	9,882	9,543
Investment banking income	1,477	1,458	4,593	4,019
Trading account profits	1,837	2,141	6,124	5,821
Mortgage banking income (loss)	(20)	589	332	1,334
Gains on sales of debt securities	125	51	278	490
Other income	559	628	2,292	1,691
Total noninterest income	10,678	11,434	33,711	32,907
Total revenue, net of interest expense	21,839	21,635	66,916	63,711
Provision for credit losses	834	850	2,395	2,823
Noninterest expense
Personnel	7,483	7,704	24,353	24,278
Occupancy	999	1,005	3,000	3,069
Equipment	416	443	1,281	1,357
Marketing	461	410	1,235	1,243
Professional fees	476	536	1,417	1,433
Amortization of intangibles	151	181	473	554
Data processing	777	685	2,344	2,240
Telecommunications	170	189	538	551
Other general operating	2,206	2,328	7,072	7,065
Total noninterest expense	13,139	13,481	41,713	41,790
Income before income taxes	7,866	7,304	22,808	19,098
Income tax expense	2,279	2,349	7,096	5,888
Net income	5,587	4,955	15,712	13,210
Preferred stock dividends	465	503	1,328	1,321
Net income applicable to common shareholders	$ 5,122	$ 4,452	$ 14,384	$ 11,889
Per common share information
Earnings (in dollars per share)	$ 0.50	$ 0.43	$ 1.42	$ 1.15
Diluted earnings (in dollars per share)	0.48	0.41	1.35	1.10
Dividends paid (in dollars per share)	$ 0.12	$ 0.075	$ 0.27	$ 0.175
Average common shares issued and outstanding (in thousands) (in shares)	10,197,891	10,250,124	10,103,386	10,312,878
Average diluted common shares issued and outstanding (in thousands) (in shares)	10,725,482	11,000,473	10,820,425	11,046,807

Consolidated Statement of Compr

Consolidated Statement of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 5,587	$ 4,955	$ 15,712	$ 13,210
Other comprehensive income (loss), net-of-tax:
Net change in debt and marketable equity securities	462	208	931	3,319
Net change in debit valuation adjustments	(80)	(65)	(149)	49
Net change in derivatives	24	127	156	277
Employee benefit plan adjustments	26	6	80	29
Net change in foreign currency translation adjustments	5	(8)	102	(17)
Other comprehensive income	437	268	1,120	3,657
Comprehensive income	$ 6,024	$ 5,223	$ 16,832	$ 16,867

Consolidated Balance Sheet

Consolidated Balance Sheet - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Assets
Cash and due from banks	$ 30,819	$ 30,719
Interest-bearing deposits with the Federal Reserve, non-U.S. central banks and other banks	141,562	117,019
Cash and cash equivalents	172,381	147,738
Time deposits placed and other short-term investments	9,493	9,861
Federal funds sold and securities borrowed or purchased under agreements to resell (includes $56,780 and $49,750 measured at fair value)	217,214	198,224
Trading account assets (includes $119,458 and $106,057 pledged as collateral)	210,319	180,209
Derivative assets	38,384	42,512
Debt securities:
Carried at fair value (includes $32,146 and $29,804 pledged as collateral)	316,864	313,660
Held-to-maturity, at cost (fair value – $121,185 and $115,285; $5,043 and $8,233 pledged as collateral)	122,345	117,071
Total debt securities	439,209	430,731
Loans and leases	927,117	906,683
Allowance for loan and lease losses	(10,693)	(11,237)
Loans and leases, net of allowance	916,424	895,446
Premises and equipment, net	8,971	9,139
Mortgage servicing rights	2,407	2,747
Goodwill	68,968	68,969
Intangible assets	2,459	2,922
Loans held-for-sale (includes $3,128 and $4,026 measured at fair value)	13,243	9,066
Customer and other receivables (includes $230 measured at fair value at September 30, 2017)	55,855	58,759
Assets of business held for sale (includes $619 measured at fair value at December 31, 2016)	0	10,670
Other assets (includes $19,321 and $13,802 measured at fair value)	128,569	120,709
Total assets	2,283,896	2,187,702
Deposits in U.S. offices:
Noninterest-bearing	429,861	438,125
Interest-bearing (includes $468 and $731 measured at fair value)	776,756	750,891
Deposits in non-U.S. offices:
Noninterest-bearing	14,126	12,039
Interest-bearing	63,674	59,879
Total deposits	1,284,417	1,260,934
Federal funds purchased and securities loaned or sold under agreements to repurchase (includes $38,852 and $35,766 measured at fair value)	189,790	170,291
Trading account liabilities	86,434	63,031
Derivative liabilities	31,781	39,480
Short-term borrowings (includes $1,904 and $2,024 measured at fair value)	32,679	23,944
Accrued expenses and other liabilities (includes $22,369 and $14,630 measured at fair value and $762 and $762 of reserve for unfunded lending commitments)	157,670	146,359
Long-term debt (includes $29,897 and $30,037 measured at fair value)	228,666	216,823
Total liabilities	2,011,437	1,920,862
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 – 10,457,473,674 and 10,052,625,604 shares	142,818	147,038
Retained earnings	113,486	101,870
Accumulated other comprehensive income (loss)	(6,168)	(7,288)
Total shareholders’ equity	272,459	266,840
Total liabilities and shareholders’ equity	2,283,896	2,187,702
Consolidated VIEs
Assets
Trading account assets (includes $119,458 and $106,057 pledged as collateral)	5,142	5,773
Debt securities:
Loans and leases	50,022	56,001
Allowance for loan and lease losses	(1,023)	(1,032)
Loans and leases, net of allowance	48,999	54,969
Loans held-for-sale (includes $3,128 and $4,026 measured at fair value)	66	188
Other assets (includes $19,321 and $13,802 measured at fair value)	662	1,596
Total assets	54,869	62,526
Deposits in non-U.S. offices:
Short-term borrowings (includes $1,904 and $2,024 measured at fair value)	122	348
Long-term debt (includes $29,897 and $30,037 measured at fair value)	9,457	10,646
All other liabilities (includes $52 and $38 of non-recourse liabilities)	54	41
Total liabilities	$ 9,633	$ 11,035

Consolidated Balance Sheet (Par

Consolidated Balance Sheet (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Assets
Federal funds sold and securities borrowed or purchased under agreements to resell measured at fair value	$ 56,780	$ 49,750
Trading account assets, pledged as collateral	119,458	106,057
Debt securities:
Carried at fair value, pledged as collateral	32,146	29,804
Held-to-maturity, fair value	121,185	115,285
Held-to-maturity, pledged as collateral	5,043	8,233
Loans and leases, measured at fair value	6,285	7,085
Loans and leases, pledged as collateral	36,362	31,805
Loans held-for-sale, measured at fair value	3,128	4,026
Customer and other receivables, measured at fair value	230
Assets of business held-for-sale at fair value		619
Other assets, measured at fair value	19,341	13,802
Deposits in U.S. offices:
Interest-bearing, measured at fair value	468	731
Federal funds purchased and securities loaned or sold under agreements to repurchase, measured at fair value	38,852	35,766
Short-term borrowings, measured at fair value	1,904	2,024
Accrued expenses and other liabilities, measured at fair value	22,369	14,630
Accrued expenses and other liabilities, reserve for unfunded lending commitments	762	762
Long-term debt, measured at fair value	$ 29,897	$ 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)	10,457,473,674	10,052,625,604
Common stock outstanding (in shares)	10,457,473,674	10,052,625,604
Consolidated VIEs | Long-term debt
Shareholders’ equity
Non-recourse debt	$ 9,398	$ 10,417
Consolidated VIEs | Other liabilities
Shareholders’ equity
Non-recourse debt	$ 52	$ 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)
Beginning Balance at Dec. 31, 2015	$ 256,176	$ 22,273	$ 151,042	$ 88,219	$ (5,358)
Beginning Balance (in shares) at Dec. 31, 2015			10,380,265
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	13,210			13,210
Net change in debt and marketable equity securities	3,319				3,319
Net change in debit valuation adjustments	49				49
Net change in derivatives	277				277
Employee benefit plan adjustments	29				29
Net change in foreign currency translation adjustments	(17)				(17)
Dividends declared:
Common	(1,805)			(1,805)
Preferred	(1,321)			(1,321)
Issuance of preferred stock	2,947	2,947
Common stock issued under employee plans, net (in shares)			5,082
Common stock issued under employee plans, net	1,001		$ 1,001
Common stock repurchased (in shares)			(261,502)
Common stock repurchased	(3,782)		$ (3,782)
Ending Balance at Sep. 30, 2016	270,083	25,220	$ 148,261	98,303	(1,701)
Ending Balance (in shares) at Sep. 30, 2016			10,123,845
Beginning Balance at Dec. 31, 2016	266,840	25,220	$ 147,038	101,870	(7,288)
Beginning Balance (in shares) at Dec. 31, 2016			10,052,626
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	15,712			15,712
Net change in debt and marketable equity securities	931				931
Net change in debit valuation adjustments	(149)				(149)
Net change in derivatives	156				156
Employee benefit plan adjustments	80				80
Net change in foreign currency translation adjustments	102				102
Dividends declared:
Common	(2,768)			(2,768)
Preferred	(1,292)	(1,300)		(1,292)
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)			39,496
Common stock issued under employee plans, net	792		$ 792
Common stock repurchased (in shares)			(334,648)
Common stock repurchased	(7,945)		$ (7,945)
Ending Balance at Sep. 30, 2017	$ 272,459	$ 22,323	$ 142,818	$ 113,486	$ (6,168)
Ending Balance (in shares) at Sep. 30, 2017			10,457,474

Consolidated Statement of Cash

Consolidated Statement of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Operating activities
Net income	$ 15,712	$ 13,210
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses	2,395	2,823
Gains on sales of debt securities	(278)	(490)
Depreciation and premises improvements amortization	1,115	1,138
Amortization of intangibles	473	554
Net amortization of premium/discount on debt securities	1,647	2,203
Deferred income taxes	5,043	5,072
Stock-based compensation	1,465	1,087
Loans held-for-sale:
Originations and purchases	(31,404)	(24,154)
Proceeds from sales and paydowns of loans originally classified as held-for-sale	27,006	21,068
Net change in:
Trading and derivative instruments	(11,844)	9,068
Other assets	(9,809)	(612)
Accrued expenses and other liabilities	11,201	(4,845)
Other operating activities, net	4,729	595
Net cash provided by operating activities	17,451	26,717
Net change in:
Time deposits placed and other short-term investments	368	(762)
Federal funds sold and securities borrowed or purchased under agreements to resell	(18,990)	(26,328)
Debt securities carried at fair value:
Proceeds from sales	64,597	67,681
Proceeds from paydowns and maturities	71,628	81,404
Purchases	(134,915)	(156,537)
Held-to-maturity debt securities:
Proceeds from paydowns and maturities	12,194	12,827
Purchases	(17,850)	(29,085)
Loans and leases:
Proceeds from sales	8,643	14,870
Purchases	(4,511)	(9,347)
Other changes in loans and leases, net	(29,654)	(17,832)
Other investing activities, net	8,451	109
Net cash used in investing activities	(40,039)	(63,000)
Net change in:
Deposits	23,483	35,636
Federal funds purchased and securities loaned or sold under agreements to repurchase	19,987	3,904
Short-term borrowings	8,583	(1,069)
Long-term debt:
Proceeds from issuance	50,702	24,681
Retirement of long-term debt	(44,724)	(41,458)
Preferred stock: Proceeds from issuance	0	2,947
Common stock repurchased	(7,945)	(3,782)
Cash dividends paid	(4,124)	(3,031)
Other financing activities, net	(609)	(58)
Net cash provided by financing activities	45,353	17,770
Effect of exchange rate changes on cash and cash equivalents	1,878	2,594
Net increase (decrease) in cash and cash equivalents	24,643	(15,919)
Cash and cash equivalents at January 1	147,738	159,353
Cash and cash equivalents at September 30	$ 172,381	$ 143,434

Summary of Significant Accounti

Summary of Significant Accounting Principles	9 Months Ended
	Sep. 30, 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 differ from those estimates and assumptions. These unaudited Consolidated Financial Statements should be read in conjunction with the audited Consolidated Financial Statements of the Corporation's 2016 Annual Report on Form 10-K. The nature of the Corporation's business is such that the results of any interim period are not necessarily indicative of results for a full year. In the opinion of management, all adjustments, which consist of normal recurring adjustments necessary for a fair statement of the interim period results have been made. The Corporation evaluates subsequent events through the date of filing with the Securities and Exchange Commission. 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 . New Accounting Pronouncements Accounting for Financial Instruments -- Credit Losses The Financial Accounting Standards Board (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. Hedge Accounting The FASB issued a new accounting standard effective on January 1, 2019, with early adoption permitted, that makes targeted improvements to simplify the application of hedge accounting guidance. The Corporation is evaluating the timing of adoption. The ongoing implementation efforts include identifying current hedge strategies and systems and processes that will need to be modified to comply with the standard, which could impact the timing of adoption. 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. 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. This new accounting standard uses a modified retrospective transition that will be applied to all prior periods presented. The Corporation is in the process of reviewing its existing lease portfolios, as well as other service contracts for embedded leases, to evaluate the impact of the new accounting standard on the financial statements, as well as the impact to regulatory capital and risk-weighted assets. The effect of the adoption will depend on its lease portfolio at the time of transition; 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. Recognition and Measurement of Financial Assets and Financial Liabilities The FASB issued a new accounting standard effective on January 1, 2018, with early adoption permitted for the provisions related to debit valuation adjustments (DVA), on recognition and measurement of financial instruments, including certain equity investments and financial liabilities recorded at fair value under the fair value option. In 2015, the Corporation early adopted, retrospective to January 1, 2015, the provisions of this new accounting standard related to DVA on financial liabilities accounted for under the fair value option. The Corporation does not expect the remaining provisions of this 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. Revenue Recognition The FASB issued a new accounting standard effective on January 1, 2018 for recognizing revenue from contracts with customers. The customer contracts within the scope of the new standard have been identified, and the Corporation's current evaluation indicates that the new standard will not impact the timing or measurement of its revenue recognition. The Corporation continues to evaluate the presentation of certain costs as either operating expenses or net against noninterest income; consequently, there may be an insignificant change in the Consolidated Statement of Income for the presentation of these costs. Overall, 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.

Derivatives

Derivatives	9 Months Ended
	Sep. 30, 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 to the Consolidated Financial Statements of the Corporation's 2016 Annual Report on Form 10-K. The following tables present derivative instruments included on the Consolidated Balance Sheet in derivative assets and liabilities at September 30, 2017 and December 31, 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. September 30, 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) $ 18,602.5 $ 179.5 $ 5.1 $ 184.6 $ 176.7 $ 1.3 $ 178.0 Futures and forwards (2) 5,957.2 0.9 — 0.9 0.8 — 0.8 Written options 1,467.4 — — — 36.3 — 36.3 Purchased options 1,390.7 38.5 — 38.5 — — — Foreign exchange contracts Swaps 2,011.9 36.6 2.5 39.1 37.0 3.1 40.1 Spot, futures and forwards 4,313.6 46.6 0.9 47.5 46.9 0.8 47.7 Written options 367.3 — — — 5.7 — 5.7 Purchased options 335.7 5.2 — 5.2 — — — Equity contracts Swaps 236.2 4.6 — 4.6 4.6 — 4.6 Futures and forwards 100.9 1.9 — 1.9 1.2 — 1.2 Written options 524.9 — — — 25.1 — 25.1 Purchased options 467.0 25.2 — 25.2 — — — Commodity contracts Swaps 47.6 1.7 — 1.7 4.2 — 4.2 Futures and forwards 51.5 3.5 — 3.5 0.6 — 0.6 Written options 25.0 — — — 1.2 — 1.2 Purchased options 26.1 1.4 — 1.4 — — — Credit derivatives (3) Purchased credit derivatives: Credit default swaps (2) 522.8 4.8 — 4.8 11.2 — 11.2 Total return swaps/other 57.6 0.1 — 0.1 1.3 — 1.3 Written credit derivatives: Credit default swaps (2) 514.5 10.9 — 10.9 4.2 — 4.2 Total return swaps/other 55.3 0.8 — 0.8 0.2 — 0.2 Gross derivative assets/liabilities $ 362.2 $ 8.5 $ 370.7 $ 357.2 $ 5.2 $ 362.4 Less: Legally enforceable master netting agreements (2) (296.7 ) (296.7 ) Less: Cash collateral received/paid (2) (35.6 ) (33.9 ) Total derivative assets/liabilities $ 38.4 $ 31.8 (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 $6.2 billion and $494.1 billion at September 30, 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/other 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/other 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 additional information on the offsetting of derivative assets and liabilities, see Note 2 – Derivatives to the Consolidated Financial Statements of the Corporation's 2016 Annual Report on Form 10-K. The following table presents derivative instruments included in derivative assets and liabilities on the Consolidated Balance Sheet at September 30, 2017 and December 31, 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 9 – Federal Funds Sold or Purchased, Securities Financing Agreements and Short-term Borrowings . Offsetting of Derivatives (1) September 30, 2017 December 31, 2016 (Dollars in billions) Derivative Assets Derivative Liabilities Derivative Assets Derivative Liabilities Interest rate contracts Over-the-counter $ 219.1 $ 211.3 $ 267.3 $ 258.2 Over-the-counter cleared (2) 2.3 2.3 177.2 182.8 Foreign exchange contracts Over-the-counter 88.2 90.7 124.3 126.7 Over-the-counter cleared 0.7 0.6 0.3 0.3 Equity contracts Over-the-counter 18.3 17.3 15.6 13.7 Exchange-traded 9.5 9.7 11.4 10.8 Commodity contracts Over-the-counter 2.7 4.0 3.7 4.9 Exchange-traded 0.7 0.6 1.1 1.0 Credit derivatives Over-the-counter 10.1 10.5 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 338.4 333.8 426.2 418.2 Exchange-traded 10.2 10.3 12.5 11.8 Over-the-counter cleared (2) 9.1 8.9 181.8 187.4 Less: Legally enforceable master netting agreements and cash collateral received/paid Over-the-counter (314.9 ) (312.8 ) (398.2 ) (392.6 ) Exchange-traded (9.2 ) (9.2 ) (8.9 ) (8.9 ) Over-the-counter cleared (2) (8.2 ) (8.6 ) (181.5 ) (187.3 ) Derivative assets/liabilities, after netting 25.4 22.4 31.9 28.6 Other gross derivative assets/liabilities (3) 13.0 9.4 10.6 10.9 Total derivative assets/liabilities 38.4 31.8 42.5 39.5 Less: Financial instruments collateral (4) (11.3 ) (9.6 ) (13.5 ) (10.5 ) Total net derivative assets/liabilities $ 27.1 $ 22.2 $ 29.0 $ 29.0 (1) Over-the-counter (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 asset and liability management (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. For additional information, see Note 2 – Derivatives to the Consolidated Financial Statements of the Corporation's 2016 Annual Report on Form 10-K. 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 the three and nine months ended September 30, 2017 and 2016 , 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) Three Months Ended September 30, 2017 Nine Months Ended September 30, 2017 (Dollars in millions) Derivative Hedged Hedge Derivative Hedged Hedge Interest rate risk on long-term debt (1) $ (273 ) $ 169 $ (104 ) $ (751 ) $ 313 $ (438 ) Interest rate and foreign currency risk on long-term debt (1) 607 (593 ) 14 1,631 (1,603 ) 28 Interest rate risk on available-for-sale securities (2) (8 ) 7 (1 ) (71 ) 40 (31 ) Price risk on commodity inventory (3) — (1 ) (1 ) 8 (8 ) — Total $ 326 $ (418 ) $ (92 ) $ 817 $ (1,258 ) $ (441 ) Three Months Ended September 30, 2016 Nine Months Ended September 30, 2016 Interest rate risk on long-term debt (1) $ (758 ) $ 580 $ (178 ) $ 3,166 $ (3,654 ) $ (488 ) Interest rate and foreign currency risk on long-term debt (1) 16 (10 ) 6 360 (369 ) (9 ) Interest rate risk on available-for-sale securities (2) 235 (250 ) (15 ) (131 ) 80 (51 ) Price risk on commodity inventory (3) 6 (6 ) — — — — Total $ (501 ) $ 314 $ (187 ) $ 3,395 $ (3,943 ) $ (548 ) (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. (3) Amounts relating to commodity inventory are recorded in trading account profits. Cash Flow and Net Investment Hedges The table below summarizes certain information related to cash flow hedges and net investment hedges for the three and nine months ended September 30, 2017 and 2016 . Of the $739 million after-tax net loss ( $1.2 billion pre-tax) on derivatives in accumulated other comprehensive income (OCI) at September 30, 2017 , $102 million after-tax ( $164 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 Three Months Ended September 30, 2017 Nine Months Ended September 30, 2017 (Dollars in millions, amounts pre-tax) Gains (Losses) Gains (Losses) Hedge (1) Gains (Losses) Gains (Losses) Hedge (1) Cash flow hedges Interest rate risk on variable-rate portfolios $ 11 $ (54 ) $ (1 ) $ 38 $ (274 ) $ 4 Price risk on restricted stock awards (2) 7 32 — 41 103 — Total $ 18 $ (22 ) $ (1 ) $ 79 $ (171 ) $ 4 Net investment hedges Foreign exchange risk (3) $ (427 ) $ (3 ) $ (33 ) $ (1,541 ) $ 1,811 $ (82 ) Three Months Ended September 30, 2016 Nine Months Ended September 30, 2016 Cash flow hedges Interest rate risk on variable-rate portfolios $ (8 ) $ (119 ) $ (4 ) $ 50 $ (447 ) $ 2 Price risk on restricted stock awards (2) 85 (8 ) — (114 ) (61 ) — Total $ 77 $ (127 ) $ (4 ) $ (64 ) $ (508 ) $ 2 Net investment hedges Foreign exchange risk $ 214 $ 2 $ (68 ) $ 173 $ 3 $ (234 ) (1) Amounts related to cash flow hedges represent hedge ineffectiveness and amounts related to net investment hedges represent amounts excluded from effectiveness testing. (2) Gains (losses) recognized in accumulated OCI are primarily related to the change in the Corporation’s stock price for the period. (3) For the nine months ended September 30, 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 during the second quarter of 2017. For additional information, see Note 12 – Accumulated Other Comprehensive Income (Loss) . 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 the three and nine months ended September 30, 2017 and 2016 . These gains (losses) are largely offset by the income or expense that is recorded on the hedged item. Other Risk Management Derivatives Gains (Losses) Three Months Ended September 30 Nine Months Ended September 30 (Dollars in millions) 2017 2016 2017 2016 Interest rate risk on mortgage banking income (1) $ 1 $ 57 $ 32 $ 882 Credit risk on loans (2) — (7 ) (3 ) (103 ) Interest rate and foreign currency risk on ALM activities (3) 26 (262 ) (26 ) (1,970 ) Price risk on restricted stock awards (4) 33 199 161 (569 ) Other — — 5 40 (1) Net gains on these derivatives are recorded in mortgage banking income as they are used to mitigate the interest rate risk related to mortgage servicing rights (MSRs), interest rate lock commitments (IRLCs) and mortgage loans held-for-sale, all of which are measured at fair value with changes in fair value recorded in mortgage banking income. 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 $76 million and $ 192 million for the three and nine months ended September 30, 2017 compared to $ 185 million and $ 514 million for the same periods in 2016. (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 September 30, 2017 and December 31, 2016 , the Corporation transferred $6.2 billion and $6.6 billion of non-U.S. government-guaranteed mortgage-backed securities (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 $6.2 billion and $6.6 billion at the transfer dates. At both September 30, 2017 and December 31, 2016 , the fair value of the transferred securities was $6.3 billion . Derivative assets of $44 million and $43 million and liabilities of $5 million and $10 million were recorded at September 30, 2017 and December 31, 2016 , and are included in credit derivatives in the derivative instruments table on page 75 . 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. For more information on sales and trading revenue, see Note 2 – Derivatives to the Consolidated Financial Statements of the Corporation's 2016 Annual Report on Form 10-K. The following table, 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 the three and nine months ended September 30, 2017 and 2016 . 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 17 – 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 Three Months Ended September 30, 2017 Nine Months Ended September 30, 2017 (Dollars in millions) Trading Account Profits Net Interest Income Other (1) Total Trading Account Profits Net Interest Income Other (1) Total Interest rate risk $ 441 $ 224 $ 91 $ 756 $ 1,115 $ 763 $ 325 $ 2,203 Foreign exchange risk 348 2 (40 ) 310 1,063 (2 ) (119 ) 942 Equity risk 640 (142 ) 464 962 2,088 (372 ) 1,426 3,142 Credit risk 251 624 104 979 1,200 1,886 450 3,536 Other risk 34 8 17 59 168 18 67 253 Total sales and trading revenue $ 1,714 $ 716 $ 636 $ 3,066 $ 5,634 $ 2,293 $ 2,149 $ 10,076 Three Months Ended September 30, 2016 Nine Months Ended September 30, 2016 Interest rate risk $ 511 $ 307 $ 83 $ 901 $ 1,430 $ 1,073 $ 210 $ 2,713 Foreign exchange risk 319 (4 ) (39 ) 276 1,003 (7 ) (112 ) 884 Equity risk 463 31 467 961 1,481 15 1,573 3,069 Credit risk 598 634 123 1,355 1,224 1,895 380 3,499 Other risk 43 7 8 58 263 (19 ) 34 278 Total sales and trading revenue $ 1,934 $ 975 $ 642 $ 3,551 $ 5,401 $ 2,957 $ 2,085 $ 10,443 (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 $ 488 million and $ 1.5 billion for the three and nine months ended September 30, 2017 and $ 485 million and $ 1.6 billion for the same periods in 2016. 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 September 30, 2017 and December 31, 2016 are summarized in the following table. Credit Derivative Instruments September 30, 2017 Carrying Value (Dollars in millions) Less than One Year One to Three Years Three to Five Years Over Five Years Total Credit default swaps: Investment grade $ 10 $ 27 $ 175 $ 389 $ 601 Non-investment grade 237 571 462 2,343 3,613 Total 247 598 637 2,732 4,214 Total return swaps/other: Investment grade 39 — — — 39 Non-investment grade 153 — — — 153 Total 192 — — — 192 Total credit derivatives $ 439 $ 598 $ 637 $ 2,732 $ 4,406 Credit-related notes: Investment grade $ — $ — $ 84 $ 702 $ 786 Non-investment grade 20 12 31 1,416 1,479 Total credit-related notes $ 20 $ 12 $ 115 $ 2,118 $ 2,265 Maximum Payout/Notional Credit default swaps: Investment grade $ 76,594 $ 117,714 $ 109,875 $ 38,025 $ 342,208 Non-investment grade 62,935 43,775 44,094 21,466 172,270 Total 139,529 161,489 153,969 59,491 514,478 Total return swaps/other: Investment grade 36,743 — — — 36,743 Non-investment grade 13,232 4,792 143 404 18,571 Total 49,975 4,792 143 404 55,314 Total credit derivatives $ 189,504 $ 166,281 $ 154,112 $ 59,895 $ 569,792 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/other: 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/other: 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 to help ensure that certain credit risk-related losses occur within acceptable, predefined limits. Credit-related notes in the table on page 81 include investments in securities issued by collateralized debt obligation (CDO), collateralized loan obligation 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 majority of the Corporation's derivative contracts contain credit-risk related features, primarily in the form of ISDA master netting agreements and credit support documentation that enhance the creditworthiness of these instruments. Therefore, events such as a credit rating downgrade 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. At September 30, 2017 and December 31, 2016 , the Corporation held cash and securities collateral of $77.4 billion and $85.5 billion , and posted cash and securities collateral of $58.4 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. At September 30, 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 $2.0 billion , including $1.2 billion for Bank of America, National Association. For more information on credit-related contingent features and collateral, see Note 2 – Derivatives to the Consolidated Financial Statements of the Corporation's 2016 Annual Report on Form 10-K. 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 September 30, 2017 , the liability recorded for these derivative contracts was $23 million . The following table presents the amount of additional collateral that would have been contractually required by derivative contracts and other trading agreements at September 30, 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 September 30, 2017 (Dollars in millions) One incremental notch Second incremental notch Bank of America Corporation $ 512 $ 668 Bank of America, N.A. and subsidiaries (1) 387 300 (1) Included in Bank of America Corporation collateral requirements in this table. 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 September 30, 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 September 30, 2017 (Dollars in millions) One incremental notch Second incremental notch Derivative liabilities $ 468 $ 1,122 Collateral posted 387 857 Valuation Adjustments on Derivatives The table below presents credit valuation adjustment (CVA), DVA and FVA gains (losses) on derivatives, which are recorded in trading account profits, on a gross and net of hedge basis for the three and nine months ended September 30, 2017 and 2016 . For more information on the valuation adjustments on derivatives, see Note 2 – Derivatives to the Consolidated Financial Statements of the Corporation's 2016 Annual Report on Form 10-K. Valuation Adjustments on Derivatives (1) Gains (Losses) Three Months Ended September 30 2017 2016 (Dollars in millions) Gross Net Gross Net Derivative assets (CVA) $ 23 $ 15 $ 280 $ 66 Derivative assets/liabilities (FVA) 37 43 42 51 Derivative liabilities (DVA) 29 17 (125 ) (103 ) Nine Months Ended September 30 2017 2016 Gross Net Gross Net Derivative assets (CVA) $ 281 $ 93 $ 45 $ 151 Derivative assets/liabilities (FVA) 113 140 9 20 Derivative liabilities (DVA) (249 ) (201 ) 106 (60 ) (1) At September 30, 2017 and December 31, 2016 , cumulative CVA reduced the derivative assets balance by $726 million and $1.0 billion , cumulative FVA reduced the net derivatives balance by $182 million and $296 million , and cumulative DVA reduced the derivative liabilities balance by $525 million and $774 million , respectively.

Securities

Securities	9 Months Ended
	Sep. 30, 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 available-for-sale (AFS) debt securities, other debt securities carried at fair value, held-to-maturity (HTM) debt securities and AFS marketable equity securities at September 30, 2017 and December 31, 2016 . Debt Securities and Available-for-Sale Marketable Equity Securities September 30, 2017 (Dollars in millions) Amortized Cost Gross Gains Gross Losses Fair Value Available-for-sale debt securities Mortgage-backed securities: Agency $ 196,530 $ 850 $ (1,186 ) $ 196,194 Agency-collateralized mortgage obligations 7,021 73 (45 ) 7,049 Commercial 12,584 48 (168 ) 12,464 Non-agency residential (1) 2,345 333 (21 ) 2,657 Total mortgage-backed securities 218,480 1,304 (1,420 ) 218,364 U.S. Treasury and agency securities 50,824 70 (626 ) 50,268 Non-U.S. securities 5,432 9 (1 ) 5,440 Other taxable securities, substantially all asset-backed securities 6,964 77 (3 ) 7,038 Total taxable securities 281,700 1,460 (2,050 ) 281,110 Tax-exempt securities 19,117 167 (92 ) 19,192 Total available-for-sale debt securities 300,817 1,627 (2,142 ) 300,302 Other debt securities carried at fair value 16,265 345 (48 ) 16,562 Total debt securities carried at fair value 317,082 1,972 (2,190 ) 316,864 Held-to-maturity debt securities, substantially all U.S. agency mortgage-backed securities 122,345 267 (1,427 ) 121,185 Total debt securities (2) $ 439,427 $ 2,239 $ (3,617 ) $ 438,049 Available-for-sale marketable equity securities (3) $ 22 $ 28 $ — $ 50 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 September 30, 2017 and December 31, 2016 , the underlying collateral type included approximately 70 percent and 60 percent prime, 13 percent and 19 percent Alt-A, and 17 percent and 21 percent subprime. (2) The Corporation had debt securities from Fannie Mae (FNMA) and Freddie Mac (FHLMC) that each exceeded 10 percent of shareholders’ equity, with an amortized cost of $165.1 billion and $48.2 billion , and a fair value of $164.2 billion and $48.1 billion at September 30, 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. During the second quarter of 2017, the Corporation sold its non-U.S. consumer credit card business. At September 30, 2017 , the accumulated net unrealized loss on AFS debt securities included in accumulated OCI was $312 million , net of the related income tax benefit of $203 million . At both September 30, 2017 and December 31, 2016 , the Corporation had nonperforming AFS debt securities of $121 million . The table below presents the components of other debt securities carried at fair value where the changes in fair value are reported in other income. In the three and nine months ended September 30, 2017 , the Corporation recorded unrealized mark-to-market net gains of $124 million and $323 million , and realized net losses of $11 million and $129 million , compared to unrealized mark-to-market net gains of $47 million and net losses of $25 million , and realized net losses of $28 million and $65 million for the same periods in 2016 . These amounts exclude hedge results. Other Debt Securities Carried at Fair Value (Dollars in millions) September 30 December 31 Mortgage-backed securities: Agency-collateralized mortgage obligations $ 5 $ 5 Non-agency residential 3,058 3,139 Total mortgage-backed securities 3,063 3,144 Non-U.S. securities (1) 13,260 16,336 Other taxable securities, substantially all asset-backed securities 239 240 Total $ 16,562 $ 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 the three and nine months ended September 30, 2017 and 2016 are presented in the table below. Gains and Losses on Sales of AFS Debt Securities Three Months Ended September 30 Nine Months Ended September 30 (Dollars in millions) 2017 2016 2017 2016 Gross gains $ 130 $ 57 $ 286 $ 513 Gross losses (5 ) (6 ) (8 ) (23 ) Net gains on sales of AFS debt securities $ 125 $ 51 $ 278 $ 490 Income tax expense attributable to realized net gains on sales of AFS debt securities $ 48 $ 19 $ 106 $ 186 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 September 30, 2017 and December 31, 2016 . Temporarily Impaired and Other-than-temporarily Impaired AFS Debt Securities September 30, 2017 Less than Twelve Months Twelve Months or Longer Total (Dollars in millions) Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Temporarily impaired AFS debt securities Mortgage-backed securities: Agency $ 96,106 $ (681 ) $ 17,570 $ (505 ) $ 113,676 $ (1,186 ) Agency-collateralized mortgage obligations 2,137 (15 ) 1,051 (30 ) 3,188 (45 ) Commercial 5,068 (59 ) 2,819 (109 ) 7,887 (168 ) Non-agency residential 140 (7 ) 118 (8 ) 258 (15 ) Total mortgage-backed securities 103,451 (762 ) 21,558 (652 ) 125,009 (1,414 ) U.S. Treasury and agency securities 20,685 (144 ) 17,035 (482 ) 37,720 (626 ) Non-U.S. securities 774 (1 ) — — 774 (1 ) Other taxable securities, substantially all asset-backed securities — — 384 (3 ) 384 (3 ) Total taxable securities 124,910 (907 ) 38,977 (1,137 ) 163,887 (2,044 ) Tax-exempt securities — — 2,682 (92 ) 2,682 (92 ) Total temporarily impaired AFS debt securities 124,910 (907 ) 41,659 (1,229 ) 166,569 (2,136 ) Other-than-temporarily impaired AFS debt securities (1) Non-agency residential mortgage-backed securities 27 (1 ) 30 (5 ) 57 (6 ) Total temporarily impaired and other-than-temporarily impaired AFS debt securities $ 124,937 $ (908 ) $ 41,689 $ (1,234 ) $ 166,626 $ (2,142 ) 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 other-than-temporary impaired AFS debt securities on which an other-than-temporary impairment (OTTI) loss, primarily related to changes in interest rates, remains in accumulated OCI. The Corporation had $0 and $33 million of credit-related OTTI losses on AFS debt securities that were recognized in other income for the three and nine months ended September 30, 2017 and $2 million and $14 million for the three and nine months ended September 30, 2016 . The amount of noncredit-related OTTI losses, which are 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 $284 million and $248 million at September 30, 2017 and 2016. 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 RMBS were as follows at September 30, 2017 . Significant Assumptions Range (1) Weighted- 10th Percentile (2) 90th Percentile (2) Prepayment speed 12.0 % 3.0 % 20.6 % Loss severity 19.8 9.1 36.5 Life default rate 21.0 1.2 77.7 (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 loan-to-value (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, 18.4 percent for Alt-A and 29.5 percent for subprime at September 30, 2017 . Additionally, 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 15.6 percent for prime, 21.7 percent for Alt-A and 22.1 percent for subprime at September 30, 2017 . The remaining contractual maturity distribution and yields of the Corporation’s debt securities carried at fair value and HTM debt securities at September 30, 2017 are summarized in the table below. Actual duration and yields may differ as prepayments on the loans underlying the mortgages or other asset-backed securities (ABS) are passed through to the Corporation. Maturities of Debt Securities Carried at Fair Value and Held-to-maturity Debt Securities September 30, 2017 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 (Dollars in millions) Amount Yield (1) Amount Yield (1) Amount Yield (1) Amount Yield (1) Amount Yield (1) Amortized cost of debt securities carried at fair value Mortgage-backed securities: Agency $ 6 4.67 % $ 25 3.38 % $ 593 2.56 % $ 195,906 3.23 % $ 196,530 3.23 % Agency-collateralized mortgage obligations — — — — 34 2.50 6,991 3.18 7,025 3.18 Commercial 48 8.11 847 2.06 11,183 2.44 506 2.70 12,584 2.45 Non-agency residential — — — — 26 0.01 5,106 9.05 5,132 9.00 Total mortgage-backed securities 54 7.73 872 2.10 11,836 2.44 208,509 3.37 221,271 3.32 U.S. Treasury and agency securities 516 0.39 21,254 1.40 29,033 1.96 21 2.42 50,824 1.71 Non-U.S. securities 16,563 0.50 1,839 1.24 110 1.34 177 6.52 18,689 0.63 Other taxable securities, substantially all asset-backed securities 1,747 2.28 2,865 2.59 1,418 2.95 1,151 3.28 7,181 2.70 Total taxable securities 18,880 0.68 26,830 1.54 42,397 2.13 209,858 3.37 297,965 2.86 Tax-exempt securities 1,175 1.46 6,428 1.77 9,155 1.66 2,359 2.03 19,117 1.73 Total amortized cost of debt securities carried at fair value $ 20,055 0.73 $ 33,258 1.58 $ 51,552 2.04 $ 212,217 3.36 $ 317,082 2.79 Amortized cost of HTM debt securities (2) $ — — $ 35 3.66 $ 1,074 2.56 $ 121,236 3.03 $ 122,345 3.03 Debt securities carried at fair value Mortgage-backed securities: Agency $ 6 $ 25 $ 598 $ 195,565 $ 196,194 Agency-collateralized mortgage obligations — — 33 7,021 7,054 Commercial 48 848 11,072 496 12,464 Non-agency residential — — 35 5,680 5,715 Total mortgage-backed securities 54 873 11,738 208,762 221,427 U.S. Treasury and agency securities 516 20,992 28,739 21 50,268 Non-U.S. securities 16,563 1,844 111 182 18,700 Other taxable securities, substantially all asset-backed securities 1,747 2,845 1,450 1,235 7,277 Total taxable securities 18,880 26,554 42,038 210,200 297,672 Tax-exempt securities 1,174 6,451 9,202 2,365 19,192 Total debt securities carried at fair value $ 20,054 $ 33,005 $ 51,240 $ 212,565 $ 316,864 Fair value of HTM debt securities (2) $ — $ 27 $ 896 $ 120,262 $ 121,185 (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	9 Months Ended
	Sep. 30, 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 September 30, 2017 and December 31, 2016 . During the second quarter of 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 additional information, see Note 1 – Summary of Significant Accounting Principles . September 30, 2017 (Dollars in millions) 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 Consumer real estate Core portfolio Residential mortgage $ 1,583 $ 306 $ 986 $ 2,875 $ 167,782 $ 170,657 Home equity 246 111 435 792 44,585 45,377 Non-core portfolio Residential mortgage (5) 1,144 540 3,728 5,412 14,978 $ 8,399 28,789 Home equity 269 131 613 1,013 10,449 2,913 14,375 Credit card and other consumer U.S. credit card 492 355 810 1,657 90,945 92,602 Direct/Indirect consumer (6) 273 82 33 388 93,003 93,391 Other consumer (7) 7 1 1 9 2,415 2,424 Total consumer 4,014 1,526 6,606 12,146 424,157 11,312 447,615 Consumer loans accounted for under the fair value option (8) $ 978 978 Total consumer loans and leases 4,014 1,526 6,606 12,146 424,157 11,312 978 448,593 Commercial U.S. commercial 459 176 349 984 281,693 282,677 Commercial real estate (9) 13 2 51 66 59,562 59,628 Commercial lease financing 39 56 45 140 21,273 21,413 Non-U.S. commercial 9 14 — 23 95,873 95,896 U.S. small business commercial 63 38 80 181 13,422 13,603 Total commercial 583 286 525 1,394 471,823 473,217 Commercial loans accounted for under the fair value option (8) 5,307 5,307 Total commercial loans and leases 583 286 525 1,394 471,823 5,307 478,524 Total loans and leases (10) $ 4,597 $ 1,812 $ 7,131 $ 13,540 $ 895,980 $ 11,312 $ 6,285 $ 927,117 Percentage of outstandings 0.50 % 0.19 % 0.77 % 1.46 % 96.64 % 1.22 % 0.68 % 100.00 % (1) Consumer real estate loans 30-59 days past due includes fully-insured loans of $905 million and nonperforming loans of $282 million . Consumer real estate loans 60-89 days past due includes fully-insured loans of $443 million and nonperforming loans of $201 million . (2) Consumer real estate includes fully-insured loans of $3.4 billion . (3) Consumer real estate includes $2.3 billion and direct/indirect consumer includes $39 million of nonperforming loans. (4) Purchased credit-impaired (PCI) loan amounts are shown gross of the valuation allowance. (5) Total outstandings includes pay option loans of $1.5 billion . The Corporation no longer originates this product. (6) Total outstandings includes auto and specialty lending loans of $50.0 billion , unsecured consumer lending loans of $484 million , U.S. securities-based lending loans of $39.3 billion , non-U.S. consumer loans of $2.9 billion and other consumer loans of $682 million . (7) Total outstandings includes consumer leases of $2.3 billion and consumer overdrafts of $160 million . (8) Consumer loans accounted for under the fair value option were residential mortgage loans of $615 million and home equity loans of $363 million . Commercial loans accounted for under the fair value option were U.S. commercial loans of $2.8 billion and non-U.S. commercial loans of $2.5 billion . For additional information, see Note 14 – Fair Value Measurements and Note 15 – Fair Value Option . (9) Total outstandings includes U.S. commercial real estate loans of $55.5 billion and non-U.S. commercial real estate loans of $4.2 billion . (10) The Corporation pledged $152.9 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. December 31, 2016 (Dollars in millions) 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 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 Commercial real estate (9) 20 10 56 86 57,269 57,355 Commercial lease financing 167 21 27 215 22,160 22,375 Non-U.S. commercial 348 4 5 357 89,040 89,397 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 were residential mortgage loans of $710 million and home equity loans of $341 million . Commercial loans accounted for under the fair value option were U.S. commercial loans of $2.9 billion and non-U.S. commercial loans of $3.1 billion . For more information, see Note 14 – Fair Value Measurements and Note 15 – 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 (GSE) underwriting guidelines, or otherwise met the Corporation's underwriting guidelines in place in 2015 are characterized as core loans. Loans held in legacy private-label securitizations, government-insured loans originated prior to 2010, loan products no longer originated, and loans originated prior to 2010 and classified as nonperforming or modified in a troubled debt restructuring (TDR) prior to 2016 are generally characterized as non-core loans, and are principally run-off portfolios. The Corporation has entered into long-term credit protection agreements with FNMA and FHLMC on loans totaling $6.5 billion and $6.4 billion at September 30, 2017 and December 31, 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 September 30, 2017 and December 31, 2016 , $336 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 September 30, 2017 , nonperforming loans discharged in Chapter 7 bankruptcy with no change in repayment terms were $379 million of which $224 million were current on their contractual payments, while $127 million were 90 days or more past due. Of the contractually current nonperforming loans, approximately 78 percent were discharged in Chapter 7 bankruptcy over 12 months ago, and approximately 68 percent were discharged 24 months or more ago. During the three and nine months ended September 30, 2017 , the Corporation sold nonperforming and other delinquent consumer real estate loans with a carrying value of $700 million and $1.2 billion , including $538 million and $742 million of PCI loans, compared to $360 million and $1.8 billion , including $111 million and $435 million of PCI loans, for the same periods in 2016 . The Corporation recorded net recoveries of $ 88 million and $102 million related to these sales for the three and nine months ended September 30, 2017 compared to net recoveries of $6 million and net charge-offs of $39 million for the same periods in 2016 . Gains related to these sales of $38 million and $50 million were recorded in other income in the Consolidated Statement of Income for the three and nine months ended September 30, 2017 compared to gains of $19 million and $63 million for the same periods in 2016 . During the nine months ended September 30, 2017 , the Corporation transferred nonperforming loans with a net carrying value of $198 million to held-for-sale, which have been subsequently sold during the nine-month period. There were no transfers of nonperforming loans to held-for-sale for the same period in 2016. The table below presents the Corporation’s nonperforming loans and leases including nonperforming TDRs, and loans accruing past due 90 days or more at September 30, 2017 and December 31, 2016 . Nonperforming loans held-for-sale (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 to the Consolidated Financial Statements of the Corporation's 2016 Annual Report on Form 10-K. Credit Quality Nonperforming Loans and Leases Accruing Past Due 90 Days or More (Dollars in millions) September 30 December 31 September 30 December 31 Consumer real estate Core portfolio Residential mortgage (1) $ 1,076 $ 1,274 $ 396 $ 486 Home equity 1,046 969 — — Non-core portfolio Residential mortgage (1) 1,442 1,782 2,976 4,307 Home equity 1,645 1,949 — — Credit card and other consumer U.S. credit card n/a n/a 810 782 Non-U.S. credit card n/a n/a — 66 Direct/Indirect consumer 43 28 31 34 Other consumer — 2 1 4 Total consumer 5,252 6,004 4,214 5,679 Commercial U.S. commercial 863 1,256 82 106 Commercial real estate 130 72 — 7 Commercial lease financing 26 36 38 19 Non-U.S. commercial 244 279 — 5 U.S. small business commercial 55 60 68 71 Total commercial 1,318 1,703 188 208 Total loans and leases $ 6,570 $ 7,707 $ 4,402 $ 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 September 30, 2017 and December 31, 2016 , residential mortgage includes $2.3 billion and $3.0 billion of loans on which interest has been curtailed by the Federal Housing Administration (FHA), and therefore are no longer accruing interest, although principal is still insured, and $1.1 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. Within the consumer portfolio segments, 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. 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. Within the Commercial portfolio segment, loans are evaluated using the internal classifications of pass rated or reservable criticized as the primary credit quality indicators. In addition to these primary credit quality indicators, the Corporation uses other credit quality indicators for certain types of loans. For more information on the portfolio segments and credit quality indicators, see Note 1 – Summary of Significant Accounting Principles and Note 4 – Outstanding Loans and Leases to the Consolidated Financial Statements of the Corporation's 2016 Annual Report on Form 10-K. 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 September 30, 2017 and December 31, 2016 . Consumer Real Estate – Credit Quality Indicators (1) September 30, 2017 (Dollars in millions) Core Residential Mortgage (2) Non-core Residential (2) Residential Mortgage PCI (3) Core Home Equity (2) Non-core Home Equity (2) Home Equity PCI Refreshed LTV (4) Less than or equal to 90 percent $ 146,679 $ 12,603 $ 7,095 $ 43,942 $ 8,128 $ 1,881 Greater than 90 percent but less than or equal to 100 percent 3,288 1,016 624 660 1,211 420 Greater than 100 percent 1,444 1,231 680 775 2,123 612 Fully-insured loans (5) 19,246 5,540 — — — — Total consumer real estate $ 170,657 $ 20,390 $ 8,399 $ 45,377 $ 11,462 $ 2,913 Refreshed FICO score Less than 620 $ 2,285 $ 2,560 $ 2,102 $ 1,192 $ 2,268 $ 470 Greater than or equal to 620 and less than 680 4,652 2,260 1,740 2,416 2,506 495 Greater than or equal to 680 and less than 740 22,153 3,720 2,446 8,484 2,860 862 Greater than or equal to 740 122,321 6,310 2,111 33,285 3,828 1,086 Fully-insured loans (5) 19,246 5,540 — — — — Total consumer real estate $ 170,657 $ 20,390 $ 8,399 $ 45,377 $ 11,462 $ 2,913 (1) Excludes $978 million of loans accounted for under the fair value option. (2) Excludes PCI loans. (3) Includes $1.3 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 September 30, 2017 (Dollars in millions) U.S. Credit Card Direct/Indirect Consumer Other Consumer Refreshed FICO score Less than 620 $ 4,612 $ 1,578 $ 42 Greater than or equal to 620 and less than 680 12,195 2,003 125 Greater than or equal to 680 and less than 740 34,796 12,161 364 Greater than or equal to 740 40,999 34,731 1,730 Other internal credit metrics (1, 2) — 42,918 163 Total credit card and other consumer $ 92,602 $ 93,391 $ 2,424 (1) Other internal credit metrics may include delinquency status, geography or other factors. (2) Direct/indirect consumer includes $42.2 billion of securities-based lending which is overcollateralized and therefore has minimal credit risk. Commercial – Credit Quality Indicators (1) September 30, 2017 (Dollars in millions) U.S. Commercial Commercial Real Estate Commercial Financing Non-U.S. Commercial U.S. Small Commercial (2) Risk ratings Pass rated $ 273,670 $ 59,001 $ 20,763 $ 93,498 $ 354 Reservable criticized 9,007 627 650 2,398 50 Refreshed FICO score (3) Less than 620 224 Greater than or equal to 620 and less than 680 615 Greater than or equal to 680 and less than 740 1,842 Greater than or equal to 740 3,683 Other internal credit metrics (3, 4) 6,835 Total commercial $ 282,677 $ 59,628 $ 21,413 $ 95,896 $ 13,603 (1) Excludes $5.3 billion of loans accounted for under the fair value option. (2) U.S. small business commercial includes $825 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 September 30, 2017 , 99 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) December 31, 2016 (Dollars in millions) Core Residential Mortgage (2) Non-core Residential (2) Residential Mortgage PCI (3) Core Home Equity (2) Non-core Home Equity (2) Home Equity PCI 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 December 31, 2016 (Dollars in millions) U.S. Credit Card Non-U.S. Credit Card Direct/Indirect Consumer Other Consumer (1) 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) December 31, 2016 (Dollars in millions) U.S. Commercial Commercial Real Estate Commercial Financing Non-U.S. Commercial U.S. Small Commercial (2) Risk ratings Pass rated $ 261,214 $ 56,957 $ 21,565 $ 85,689 $ 453 Reservable criticized 9,158 398 810 3,708 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 $ 57,355 $ 22,375 $ 89,397 $ 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 97 . For more information, see Note 1 – Summary of Significant Accounting Principles to the Consolidated Financial Statements of the Corporation's 2016 Annual Report on Form 10-K. 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. For more information on impaired consumer real estate loans, see Note 4 – Outstanding Loans and Leases to the Consolidated Financial Statements of the Corporation's 2016 Annual Report on Form 10-K. 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 September 30, 2017 , of which $379 million were classified as nonperforming and $442 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. At both September 30, 2017 and December 31, 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 $259 million and $363 million at September 30, 2017 and December 31, 2016 . The carrying value of consumer real estate loans, including fully-insured and PCI loans, for which formal foreclosure proceedings were in process at September 30, 2017 was $3.7 billion . During the three and nine months ended September 30, 2017 , the Corporation reclassified $198 million and $624 million 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. This compared to reclassifications of $326 million and $1.1 billion for the same periods in 2016 . The reclassifications represent non-cash investing activities and, accordingly, are not reflected in the Consolidated Statement of Cash Flows. The table below provides the unpaid principal balance, carrying value and related allowance at September 30, 2017 and December 31, 2016 , and the average carrying value and interest income recognized for the three and nine months ended September 30, 2017 and 2016 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 September 30, 2017 December 31, 2016 (Dollars in millions) Unpaid Balance Carrying Value Related Allowance Unpaid Balance Carrying Value Related Allowance With no recorded allowance Residential mortgage $ 9,212 $ 7,172 $ — $ 11,151 $ 8,695 $ — Home equity 3,644 1,962 — 3,704 1,953 — With an allowance recorded Residential mortgage $ 3,167 $ 3,079 $ 188 $ 4,041 $ 3,936 $ 219 Home equity 990 909 181 910 824 137 Total Residential mortgage $ 12,379 $ 10,251 $ 188 $ 15,192 $ 12,631 $ 219 Home equity 4,634 2,871 181 4,614 2,777 137 Three Months Ended September 30 Nine Months Ended September 30 2017 2016 2017 2016 Average Interest (1) Average Interest (1) Average Interest (1) Average Interest (1) With no recorded allowance Residential mortgage $ 7,498 $ 77 $ 9,673 $ 83 $ 7,964 $ 237 $ 10,523 $ 277 Home equity 2,000 27 1,964 37 2,001 82 1,883 67 With an allowance recorded Residential mortgage $ 3,254 $ 29 $ 4,676 $ 36 $ 3,565 $ 97 $ 5,371 $ 133 Home equity 873 6 822 7 850 18 863 18 Total Residential mortgage $ 10,752 $ 106 $ 14,349 $ 119 $ 11,529 $ 334 $ 15,894 $ 410 Home equity 2,873 33 2,786 44 2,851 100 2,746 85 (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 September 30, 2017 and 2016 unpaid principal balance, carrying value, and average pre- and post-modification interest rates on consumer real estate loans that were modified in TDRs during the three and nine months ended September 30, 2017 and 2016 , 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 the Three Months Ended September 30, 2017 and 2016 (1) September 30, 2017 Three Months Ended September 30, 2017 (Dollars in millions) Unpaid Principal Balance Carrying Value Pre-Modification Interest Rate Post-Modification Interest Rate (2) Net Charge-offs (3) Residential mortgage $ 294 $ 263 4.42 % 4.33 % $ 2 Home equity 212 172 4.01 3.96 15 Total $ 506 $ 435 4.25 4.17 $ 17 September 30, 2016 Three Months Ended September 30, 2016 Residential mortgage $ 487 $ 445 4.83 % 4.51 % $ 4 Home equity 292 223 4.95 3.41 17 Total $ 779 $ 668 4.87 4.10 $ 21 Consumer Real Estate – TDRs Entered into During the Nine Months Ended September 30, 2017 and 2016 (1) September 30, 2017 Nine Months Ended September 30, 2017 Residential mortgage $ 738 $ 657 4.49 % 4.25 % $ 5 Home equity 630 491 4.16 3.52 32 Total $ 1,368 $ 1,148 4.33 3.90 $ 37 September 30, 2016 Nine Months Ended September 30, 2016 Residential mortgage $ 1,039 $ 942 4.77 % 4.29 % $ 9 Home equity 718 552 4.03 2.87 43 Total $ 1,757 $ 1,494 4.47 3.71 $ 52 (1) During the three and nine months ended September 30, 2017 , there was no forgiveness of principal related to residential mortgage loans in connection with TDRs compared to $1 million and $12 million for the same periods in 2016 . (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 September 30, 2017 and 2016 due to sales and other dispositions. The table below presents the September 30, 2017 and 2016 carrying value for consumer real estate loans that were modified in a TDR during the three and nine months ended September 30, 2017 and 2016 by type of modification. Consumer Real Estate – Modification Programs TDRs Entered into During the Three Months Ended September 30 Nine Months Ended September 30 (Dollars in millions) 2017 2016 2017 2016 Modifications under government programs Contractual interest rate reduction $ 10 $ 18 $ 56 $ 121 Principal and/or interest forbearance 1 2 4 11 Other modifications (1) 7 3 22 21 Total modifications under government programs 18 23 82 153 Modifications under proprietary programs Contractual interest rate reduction 15 20 178 143 Capitalization of past due amounts 12 4 47 27 Principal and/or interest forbearance 2 2 28 47 Other modifications (1) 1 45 45 72 Total modifications under proprietary programs 30 71 298 289 Trial modifications 329 490 605 853 Loans discharged in Chapter 7 bankruptcy (2) 58 84 163 199 Total modifications $ 435 $ 668 $ 1,148 $ 1,494 (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 the three and nine months ended September 30, 2017 and 2016 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 Three Months Ended September 30 Nine Months Ended September 30 (Dollars in millions) 2017 2016 2017 2016 Modifications under government programs $ 16 $ 51 $ 62 $ 230 Modifications under proprietary programs 32 40 99 145 Loans discharged in Chapter 7 bankruptcy (1) 16 42 93 124 Trial modifications (2) 54 161 312 648 Total modifications $ 118 $ 294 $ 566 $ 1,147 (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. Credit Card and Other Consumer Impaired loans within the Credit Card and Other Consumer portfolio segment consist entirely of loans that have been modified in TDRs. The Corporation seeks to assist customers that are experiencing financial difficulty by modifying loans while ensuring compliance with federal, local and international laws and guidelines. Credit card and other consumer loan modifications generally involve reducing the interest

Allowance for Credit Losses

Allowance for Credit Losses	9 Months Ended
	Sep. 30, 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 the three and nine months ended September 30, 2017 and 2016 . Three Months Ended September 30, 2017 (Dollars in millions) Consumer Real Estate (1) Credit Card and Other Consumer Commercial Total Allowance Allowance for loan and lease losses, July 1 $ 2,309 $ 3,386 $ 5,180 $ 10,875 Loans and leases charged off (231 ) (919 ) (212 ) (1,362 ) Recoveries of loans and leases previously charged off 230 189 43 462 Net charge-offs (1 ) (730 ) (169 ) (900 ) Write-offs of PCI loans (2) (73 ) — — (73 ) Provision for loan and lease losses (3) (204 ) 934 99 829 Other (4) 1 (40 ) 1 (38 ) Allowance for loan and lease losses, September 30 2,032 3,550 5,111 10,693 Reserve for unfunded lending commitments, July 1 — — 757 757 Provision for unfunded lending commitments — — 5 5 Reserve for unfunded lending commitments, September 30 — — 762 762 Allowance for credit losses, September 30 $ 2,032 $ 3,550 $ 5,873 $ 11,455 Three Months Ended September 30, 2016 Allowance for loan and lease losses, July 1 $ 3,209 $ 3,334 $ 5,294 $ 11,837 Loans and leases charged off (246 ) (868 ) (163 ) (1,277 ) Recoveries of loans and leases previously charged off 145 191 53 389 Net charge-offs (101 ) (677 ) (110 ) (888 ) Write-offs of PCI loans (2) (83 ) — — (83 ) Provision for loan and lease losses (3) (36 ) 741 129 834 Other (4) — (8 ) — (8 ) Allowance for loan and lease losses, September 30 2,989 3,390 5,313 11,692 Reserve for unfunded lending commitments, July 1 — — 750 750 Provision for unfunded lending commitments — — 16 16 Other (4) — — 1 1 Reserve for unfunded lending commitments, September 30 — — 767 767 Allowance for credit losses, September 30 $ 2,989 $ 3,390 $ 6,080 $ 12,459 Nine Months Ended September 30, 2017 Allowance for loan and lease losses, January 1 $ 2,750 $ 3,229 $ 5,258 $ 11,237 Loans and leases charged off (633 ) (2,819 ) (570 ) (4,022 ) Recoveries of loans and leases previously charged off 520 623 137 1,280 Net charge-offs (5) (113 ) (2,196 ) (433 ) (2,742 ) Write-offs of PCI loans (2) (161 ) — — (161 ) Provision for loan and lease losses (3) (445 ) 2,553 287 2,395 Other (4) 1 (36 ) (1 ) (36 ) Allowance for loan and lease losses, September 30 2,032 3,550 5,111 10,693 Reserve for unfunded lending commitments, January 1 — — 762 762 Provision for unfunded lending commitments — — — — Reserve for unfunded lending commitments, September 30 — — 762 762 Allowance for credit losses, September 30 $ 2,032 $ 3,550 $ 5,873 $ 11,455 Nine Months Ended September 30, 2016 Allowance for loan and lease losses, January 1 $ 3,914 $ 3,471 $ 4,849 $ 12,234 Loans and leases charged off (928 ) (2,664 ) (559 ) (4,151 ) Recoveries of loans and leases previously charged off 464 584 162 1,210 Net charge-offs (464 ) (2,080 ) (397 ) (2,941 ) Write-offs of PCI loans (2) (270 ) — — (270 ) Provision for loan and lease losses (3) (191 ) 2,031 962 2,802 Other (4) — (32 ) (101 ) (133 ) Allowance for loan and lease losses, September 30 2,989 3,390 5,313 11,692 Reserve for unfunded lending commitments, January 1 — — 646 646 Provision for unfunded lending commitments — — 21 21 Other (4) — — 100 100 Reserve for unfunded lending commitments, September 30 — — 767 767 Allowance for credit losses, September 30 $ 2,989 $ 3,390 $ 6,080 $ 12,459 (1) Includes valuation allowance associated with the PCI loan portfolio. (2) Write-offs included $45 million and $80 million associated with the sale of PCI loans during the three and nine months ended September 30, 2017 compared to $11 million and $50 million for the same periods in 2016 . (3) During the three and nine months ended September 30, 2017 , for the PCI loan portfolio, the Corporation recorded provision expense of $12 million and $56 million compared to provision expense of $8 million and a benefit of $81 million for the same periods in 2016 . (4) Primarily represents the net impact of portfolio sales, consolidations and deconsolidations, foreign currency translation adjustments, transfers to held-for-sale and certain other reclassifications. (5) Includes net charge-offs of non-U.S. credit card loans, which were previously included in assets of business held for sale. During the second quarter of 2017, the Corporation sold its non-U.S. consumer credit card business. The table below presents the allowance and the carrying value of outstanding loans and leases by portfolio segment at September 30, 2017 and December 31, 2016 . Allowance and Carrying Value by Portfolio Segment September 30, 2017 (Dollars in millions) Consumer Real Estate Credit Card and Other Consumer Commercial Total Impaired loans and troubled debt restructurings (1) Allowance for loan and lease losses (2) $ 369 $ 125 $ 232 $ 726 Carrying value (3) 13,122 485 2,498 16,105 Allowance as a percentage of carrying value 2.81 % 25.77 % 9.29 % 4.51 % Loans collectively evaluated for impairment Allowance for loan and lease losses $ 1,348 $ 3,425 $ 4,879 $ 9,652 Carrying value (3, 4) 234,764 187,932 470,719 893,415 Allowance as a percentage of carrying value (4) 0.57 % 1.82 % 1.04 % 1.08 % Purchased credit-impaired loans Valuation allowance $ 315 n/a n/a $ 315 Carrying value gross of valuation allowance 11,312 n/a n/a 11,312 Valuation allowance as a percentage of carrying value 2.78 % n/a n/a 2.78 % Total Total allowance for loan and lease losses $ 2,032 $ 3,550 $ 5,111 $ 10,693 Carrying value (3, 4) 259,198 188,417 473,217 920,832 Total allowance as a percentage of carrying value (4) 0.78 % 1.88 % 1.08 % 1.16 % 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 September 30, 2017 and December 31, 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 $6.3 billion and $7.1 billion at September 30, 2017 and December 31, 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 . During the second quarter of 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	9 Months Ended
	Sep. 30, 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. For more information on the Corporation’s use of VIEs, see Note 1 – Summary of Significant Accounting Principles and Note 6 – Securitizations and Other Variable Interest Entities to the Consolidated Financial Statements of the Corporation's 2016 Annual Report on Form 10-K. The tables in this Note present the assets and liabilities of consolidated and unconsolidated VIEs at September 30, 2017 and December 31, 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 September 30, 2017 and December 31, 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 additional information, see Note 11 – Long-term Debt to the Consolidated Financial Statements of the Corporation's 2016 Annual Report on Form 10-K. The Corporation uses VIEs, such as common trust funds managed within Global Wealth & Investment Management ( GWIM) , to provide investment opportunities for clients. 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 the nine months ended September 30, 2017 or the year ended December 31, 2016 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. 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 the three and nine months ended September 30, 2017 and 2016 . First-lien Mortgage Securitizations Residential Mortgage - Agency Commercial Mortgage Three Months Ended September 30 Nine Months Ended September 30 Three Months Ended September 30 Nine Months Ended September 30 (Dollars in millions) 2017 2016 2017 2016 2017 2016 2017 2016 Cash proceeds from new securitizations (1) $ 3,833 $ 7,131 $ 11,791 $ 18,580 $ 1,225 $ 1,052 $ 2,931 $ 3,031 Gains on securitizations (2) 40 89 140 322 14 27 67 18 Repurchases from securitization trusts (3) 609 684 2,083 2,058 — — — — (1) The Corporation transfers residential mortgage loans to securitizations sponsored by the GSEs or Government National Mortgage Association (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 and commercial 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 $63 million and $195 million , net of hedges, during the three and nine months ended September 30, 2017 compared to $149 million and $349 million for the same periods in 2016 , 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 $770 million and $1.3 billion in connection with first-lien mortgage securitizations for the three and nine months ended September 30, 2017 compared to $1.2 billion and $3.1 billion for the same periods in 2016 . 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 the three and nine months ended September 30, 2017 and 2016 , 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 $289.3 billion and $355.0 billion at September 30, 2017 and 2016 . Servicing fee and ancillary fee income on serviced loans was $213 million and $691 million during the three and nine months ended September 30, 2017 compared to $286 million and $887 million for the same periods in 2016 . Servicing advances on serviced loans, including loans serviced for others and loans held for investment were $4.7 billion and $6.2 billion at September 30, 2017 and December 31, 2016 . For more information on MSRs, see Note 14 – Fair Value Measurements . During the three and nine months ended September 30, 2016 , the Corporation deconsolidated agency residential mortgage securitization vehicles with total assets of $326 million and $3.1 billion following the sale of retained interests to third parties, after which the Corporation no longer had the unilateral ability to liquidate the vehicles. Gains on sale of $11 million and $125 million related to these deconsolidations were recorded in other income in the Consolidated Statement of Income. No deconsolidations of agency residential mortgage securitization vehicles occurred during the three and nine months ended September 30, 2017 . The following table summarizes select information related to first-lien mortgage securitization trusts in which the Corporation held a variable interest at September 30, 2017 and December 31, 2016 . First-lien Mortgage VIEs Residential Mortgage Non-agency Agency Prime Subprime Alt-A Commercial Mortgage (Dollars in millions) September 30 December 31 September 30 December 31 September 30 December 31 September 30 December 31 September 30 December 31 Unconsolidated VIEs Maximum loss exposure (1) $ 19,585 $ 22,661 $ 623 $ 757 $ 2,677 $ 2,750 $ 464 $ 560 $ 420 $ 344 On-balance sheet assets Senior securities held (2) : Trading account assets $ 300 $ 1,399 $ 18 $ 20 $ 51 $ 112 $ 35 $ 118 $ 58 $ 51 Debt securities carried at FV 15,827 17,620 359 441 2,226 2,235 318 305 — — Held-to-maturity securities 3,447 3,630 — — — — — — 160 64 Subordinate securities held (2) : Trading account assets — — 1 1 22 23 1 1 11 14 Debt securities carried at FV — — 6 8 2 2 20 23 48 54 Held-to-maturity securities — — — — — — — — — 13 Residual interests held — — — — — — — — 25 25 All other assets (3) 11 12 23 28 — — 90 113 — — Total retained positions $ 19,585 $ 22,661 $ 407 $ 498 $ 2,301 $ 2,372 $ 464 $ 560 $ 302 $ 221 Principal balance outstanding (4) $ 242,353 $ 265,332 $ 11,152 $ 16,280 $ 10,993 $ 19,373 $ 29,550 $ 35,788 $ 24,945 $ 23,826 Consolidated VIEs Maximum loss exposure (1) $ 15,040 $ 18,084 $ 337 $ — $ — $ — $ — $ 25 $ — $ — On-balance sheet assets Trading account assets $ 37 $ 434 $ 330 $ — $ — $ — $ — $ 99 $ — $ — Loans and leases 14,762 17,223 — — — — — — — — All other assets 241 427 7 — — — — — — — Total assets $ 15,040 $ 18,084 $ 337 $ — $ — $ — $ — $ 99 $ — $ — On-balance sheet liabilities Long-term debt $ — $ — $ — $ — $ — $ — $ — $ 74 $ — $ — All other liabilities 2 4 — — — — — — — — Total liabilities $ 2 $ 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 additional information, see Note 7 – Representations and Warranties Obligations and Corporate Guarantees and Note 14 – Fair Value Measurements . (2) As a holder of these securities, the Corporation receives scheduled principal and interest payments. During the three and nine months ended September 30, 2017 , the Corporation recognized $0 and $16 million compared to $1 million and $5 million for the same periods in 2016 of credit-related impairment losses in earnings on those securities classified as AFS debt securities. During the three and nine months ended September 30, 2017 and 2016 , the Corporation recognized no credit-related impairment losses in earnings on those securities classified as HTM. (3) Not included in the table above are all other assets of $147 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 $147 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 September 30, 2017 and December 31, 2016 . (4) 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 September 30, 2017 and December 31, 2016 . Home Equity Loan, Credit Card and Other Asset-backed VIEs Home Equity Loan (1) Credit Card (2, 3) Resecuritization Trusts Municipal Bond Trusts (Dollars in millions) September 30 December 31 September 30 December 31 September 30 December 31 September 30 December 31 Unconsolidated VIEs Maximum loss exposure $ 1,632 $ 2,732 $ — $ — $ 9,107 $ 9,906 $ 1,566 $ 1,635 On-balance sheet assets Senior securities held (4) : Trading account assets $ — $ — $ — $ — $ 1,246 $ 902 $ 9 $ — Debt securities carried at fair value 39 46 — — 1,891 2,338 — — Held-to-maturity securities — — — — 5,866 6,569 — — Subordinate securities held (4) : Trading account assets — — — — 30 27 — — Debt securities carried at fair value — — — — 74 70 — — Total retained positions $ 39 $ 46 $ — $ — $ 9,107 $ 9,906 $ 9 $ — Total assets of VIEs (5) $ 2,598 $ 4,274 $ — $ — $ 21,822 $ 22,155 $ 2,250 $ 2,406 Consolidated VIEs Maximum loss exposure $ 119 $ 149 $ 22,937 $ 25,859 $ 343 $ 420 $ 1,215 $ 1,442 On-balance sheet assets Trading account assets $ — $ — $ — $ — $ 864 $ 1,428 $ 1,214 $ 1,454 Loans and leases 192 244 32,281 35,135 — — — — Allowance for loan and lease losses (13 ) (16 ) (1,002 ) (1,007 ) — — — — All other assets 6 7 276 793 — — 1 — Total assets $ 185 $ 235 $ 31,555 $ 34,921 $ 864 $ 1,428 $ 1,215 $ 1,454 On-balance sheet liabilities Short-term borrowings $ — $ — $ — $ — $ — $ — $ 122 $ 348 Long-term debt 82 108 8,598 9,049 521 1,008 — 12 All other liabilities — — 20 13 — — — — Total liabilities $ 82 $ 108 $ 8,618 $ 9,062 $ 521 $ 1,008 $ 122 $ 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 additional information, see Note 7 – Representations and Warranties Obligations and Corporate Guarantees . (2) At September 30, 2017 and December 31, 2016 , loans and leases in the consolidated credit card trust included $15.3 billion and $17.6 billion of seller’s interest. (3) At September 30, 2017 and December 31, 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 include senior and subordinate securities and residual interests. 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 available credit on the home equity lines, performance of the loans, the amount of subsequent draws and the timing of related cash flows. 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 senior and subordinate securities, subordinate interests in accrued interest and fees on the securitized receivables, and cash reserve accounts. For the nine months ended September 30, 2017 , $3.1 billion of new senior debt securities were issued to third-party investors from the credit card securitization trust compared to $750 million for the same period in 2016. At September 30, 2017 and December 31, 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 . There were $500 million of these subordinate securities issued for the nine months ended September 30, 2017 compared to $121 million for the same period in 2016 . 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 $5.0 billion and $20.1 billion of securities during the three and nine months ended September 30, 2017 compared to $5.6 billion and $20.3 billion for the same periods in 2016 . Securities transferred into resecuritization vehicles during the three and nine months ended September 30, 2017 and 2016 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. Resecuritization proceeds included securities with an initial fair value of $855 million and $2.7 billion during the three and nine months ended September 30, 2017 compared to $430 million and $2.6 billion for the same periods in 2016 . All of the 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 September 30, 2017 and December 31, 2016 . The weighted-average remaining life of bonds held in the trusts at September 30, 2017 was 5.6 years. There were no material write-downs or downgrades of assets or issuers during the nine months ended September 30, 2017 and 2016 . Other Variable Interest Entities The table below summarizes select information related to other VIEs in which the Corporation held a variable interest at September 30, 2017 and December 31, 2016 . Other VIEs September 30, 2017 December 31, 2016 (Dollars in millions) Consolidated Unconsolidated Total Consolidated Unconsolidated Total Maximum loss exposure $ 5,398 $ 19,676 $ 25,074 $ 6,114 $ 17,754 $ 23,868 On-balance sheet assets Trading account assets $ 2,697 $ 303 $ 3,000 $ 2,358 $ 233 $ 2,591 Debt securities carried at fair value — 197 197 — 122 122 Loans and leases 2,787 4,200 6,987 3,399 3,249 6,648 Allowance for loan and lease losses (8 ) (33 ) (41 ) (9 ) (24 ) (33 ) Loans held-for-sale 66 843 909 188 464 652 All other assets 131 13,717 13,848 369 13,156 13,525 Total $ 5,673 $ 19,227 $ 24,900 $ 6,305 $ 17,200 $ 23,505 On-balance sheet liabilities Long-term debt (1) $ 256 $ — $ 256 $ 395 $ — $ 395 All other liabilities 32 3,146 3,178 24 2,959 2,983 Total $ 288 $ 3,146 $ 3,434 $ 419 $ 2,959 $ 3,378 Total assets of VIEs $ 5,673 $ 69,817 $ 75,490 $ 6,305 $ 62,269 $ 68,574 (1) Includes $13 million and $229 million of long-term debt at September 30, 2017 and December 31, 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 $2.4 billion and $2.9 billion at September 30, 2017 and December 31, 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 $55 million and $323 million at September 30, 2017 and December 31, 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 $428 million and $430 million at September 30, 2017 and December 31, 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 September 30, 2017 and December 31, 2016 , the Corporation’s consolidated investment vehicles had total assets of $683 million and $846 million . The Corporation also held investments in unconsolidated vehicles with total assets of $24.1 billion and $17.3 billion at September 30, 2017 and December 31, 2016 . The Corporation’s maximum loss exposure associated with both consolidated and unconsolidated investment vehicles totaled $6.4 billion and $5.1 billion at September 30, 2017 and December 31, 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 $90 million and $150 million , including a funded balance of $45 million and $75 million at September 30, 2017 and December 31, 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 $2.3 billion and $2.6 billion at September 30, 2017 and December 31, 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 $13.4 billion and $12.6 billion at September 30, 2017 and December 31, 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 $7.6 billion and $7.4 billion , including unfunded commitments to provide capital contributions of $2.8 billion and $2.7 billion at September 30, 2017 and December 31, 2016 . The unfunded commitments are expected to be paid over the next five years . The Corporation recognized tax credits and other tax benefits from investments in affordable housing partnerships of $293 million and $825 million , and reported pre-tax losses in other noninterest income of $209 million and $612 million for the three and nine months ended September 30, 2017 . For the same periods in 2016 , the Corporation recognized tax credits and other tax benefits of $337 million and $819 million , and pre-tax losses of $200 million and $596 million . 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	9 Months Ended
	Sep. 30, 2017
Representations and Warranties Obligations and Corporate Guarantees [Abstract]
Representations and Warranties Obligations and Corporate Guarantees	Representations and Warranties Obligations and Corporate Guarantees For information on representations and warranties obligations and corporate guarantees and related settlement actions, see Note 7 – Representations and Warranties Obligations and Corporate Guarantees to the Consolidated Financial Statements of the Corporation's 2016 Annual Report on Form 10-K . 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 (MI) 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 following table presents unresolved repurchase claims at September 30, 2017 and December 31, 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. For more information, see Private-label Securitizations and Whole-loan Sales Experience in the MD&A of the Corporation's 2016 Annual Report on Form 10-K , as well as Note 12 – Commitments and Contingencies to the Consolidated Financial Statements of the Corporation's 2016 Annual Report on Form 10-K . Unresolved Repurchase Claims by Counterparty, Net of Duplicate Claims (Dollars in millions) September 30 December 31 By counterparty Private-label securitization trustees, whole-loan investors, including third-party securitization sponsors and other (1) $ 16,019 $ 16,685 Monolines 1,578 1,583 GSEs 5 9 Total unresolved repurchase claims by counterparty, net of duplicate claims $ 17,602 $ 18,277 (1) Includes $11.3 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 September 30, 2017 and December 31, 2016 . During the nine months ended September 30, 2017 , the Corporation received $71 million in new repurchase claims and $746 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 September 30, 2017 and December 31, 2016 . During the three months ended September 30, 2017, the Corporation reached an agreement with the party requesting indemnity, subject to acceptance of a settlement agreement by a securitization trustee; the impact of this agreement is included in the 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 Prior to 2009, 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. For more information on private-label securitizations and whole-loan sales experience, see Note 7 – Representations and Warranties Obligations and Corporate Guarantees to the Consolidated Financial Statements of the Corporation's 2016 Annual Report on Form 10-K . At September 30, 2017 and December 31, 2016 , the notional amount of unresolved repurchase claims submitted by private-label securitization trustees, whole-loan investors, including third-party securitization sponsors, and others was $16.0 billion and $16.7 billion . The notional amount of unresolved repurchase claims at September 30, 2017 and December 31, 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 the nine months ended September 30, 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. Reserve for Representations and Warranties and Corporate Guarantees 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 Corporation’s representations and warranties reserve and the corresponding estimated range of possible loss at September 30, 2017 considers, among other things, the repurchase experience implied in the settlements with BNY Mellon and other counterparties. Since the securitization trusts that were included in the settlements with BNY Mellon and other counterparties differ from other securitization trusts, the Corporation adjusts the experience implied by those prior settlements based on the characteristics of 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 Three Months Ended September 30 Nine Months Ended September 30 (Dollars in millions) 2017 2016 2017 2016 Reserve for representations and warranties and corporate guarantees, beginning of period $ 2,248 $ 2,723 $ 2,339 $ 11,326 Additions for new sales 1 1 3 3 Payments (1) (297 ) (23 ) (385 ) (8,687 ) Provision 198 99 193 158 Reserve for representations and warranties and corporate guarantees, September 30 $ 2,150 $ 2,800 $ 2,150 $ 2,800 (1) In February 2016, the Corporation made an $8.5 billion settlement payment to BNY Mellon 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 September 30, 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 $2 billion over existing accruals at September 30, 2017 . 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. For more information on the reserve for representations and warranties exposures and the corresponding estimated range of possible loss, see Note 7 – Representations and Warranties Obligations and Corporate Guarantees to the Consolidated Financial Statements of the Corporation's Quarterly Report on Form 10-Q for the quarterly period ended March 31, 2017 , and Note 7 – Representations and Warranties Obligations and Corporate Guarantees to the Consolidated Financial Statements of the Corporation's 2016 Annual Report on Form 10-K .

Goodwill and Intangible Assets

Goodwill and Intangible Assets	9 Months Ended
	Sep. 30, 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 September 30, 2017 and December 31, 2016 . The reporting units utilized for goodwill impairment testing are the operating segments or one level below. For additional information, see Note 8 – Goodwill and Intangible Assets to the Consolidated Financial Statements of the Corporation's 2016 Annual Report on Form 10-K. Goodwill (Dollars in millions) September 30 December 31 Consumer Banking $ 30,123 $ 30,123 Global Wealth & Investment Management 9,680 9,681 Global Banking 23,923 23,923 Global Markets 5,197 5,197 All Other 45 820 Less: Goodwill of business held for sale (1) — (775 ) Total goodwill $ 68,968 $ 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 . During the second quarter of 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 September 30, 2017 and December 31, 2016 . Intangible Assets (1, 2) September 30, 2017 December 31, 2016 (Dollars in millions) Gross Carrying Value Accumulated Amortization Net Gross Carrying Value Accumulated Amortization Net Purchased credit card and affinity relationships $ 5,919 $ 5,553 $ 366 $ 6,830 $ 6,243 $ 587 Core deposit and other intangibles (3) 3,835 2,120 1,715 3,836 2,046 1,790 Customer relationships 3,886 3,509 377 3,887 3,275 612 Total intangible assets (4) $ 13,640 $ 11,182 $ 2,458 $ 14,553 $ 11,564 $ 2,989 (1) Excludes fully amortized intangible assets. (2) At both September 30, 2017 and December 31, 2016 , none of the intangible assets were impaired. (3) Includes $1.6 billion at both September 30, 2017 and December 31, 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 $151 million and $473 million for the three and nine months ended September 30, 2017 compared to $181 million and $554 million for the same periods in 2016. The Corporation estimates aggregate amortization expense will be $147 million for the remainder of 2017, and $538 million , $105 million and $53 million for the years through 2020 and none for the years thereafter.

Federal Funds Sold or Purchased

Federal Funds Sold or Purchased, Securities Financing Agreements and Short-term Borrowings	9 Months Ended
	Sep. 30, 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 following table 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 15 – Fair Value Option . Three Months Ended September 30 Nine Months Ended September 30 2017 2016 2017 2016 (Dollars in millions) Amount Rate Amount Rate Amount Rate Amount Rate Federal funds sold and securities borrowed or purchased under agreements to resell Average during period $ 223,585 1.17 % $ 214,254 0.50 % $ 222,255 1.00 % $ 215,476 0.50 % Maximum month-end balance during period 224,815 n/a 222,489 n/a 237,064 n/a 225,015 n/a Federal funds purchased and securities loaned or sold under agreements to repurchase Average during period $ 197,794 1.37 % $ 177,883 0.93 % $ 199,433 1.18 % $ 184,500 1.00 % Maximum month-end balance during period 197,604 n/a 192,536 n/a 218,017 n/a 196,631 n/a Short-term borrowings Average during period 32,153 2.54 29,751 2.02 38,329 2.43 30,631 1.85 Maximum month-end balance during period 32,679 n/a 31,935 n/a 46,202 n/a 33,051 n/a n/a = not applicable 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. For more information, see Note 10 – Federal Funds Sold or Purchased, Securities Financing Agreements and Short-term Borrowings to the Consolidated Financial Statements of the Corporation's 2016 Annual Report on Form 10-K . 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 September 30, 2017 and December 31, 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 September 30, 2017 (Dollars in millions) Gross Assets/Liabilities (1) Amounts Offset Net Balance Sheet Amount Financial Instruments (2) Net Assets/Liabilities Securities borrowed or purchased under agreements to resell (3) $ 362,065 $ (144,851 ) $ 217,214 $ (165,776 ) $ 51,438 Securities loaned or sold under agreements to repurchase $ 334,627 $ (144,851 ) $ 189,776 $ (161,131 ) $ 28,645 Other (4) 22,258 — 22,258 (22,258 ) — Total $ 356,885 $ (144,851 ) $ 212,034 $ (183,389 ) $ 28,645 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) Financial instruments 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 $11.1 billion and $10.1 billion reported in loans and leases on the Consolidated Balance Sheet at September 30, 2017 and December 31, 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 tables below 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 September 30, 2017 (Dollars in millions) Overnight and Continuous 30 Days or Less After 30 Days Through 90 Days Greater than 90 Days (1) Total Securities sold under agreements to repurchase $ 119,610 $ 89,934 $ 41,358 $ 59,174 $ 310,076 Securities loaned 16,027 404 1,989 6,131 24,551 Other 22,258 — — — 22,258 Total $ 157,895 $ 90,338 $ 43,347 $ 65,305 $ 356,885 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 September 30, 2017 (Dollars in millions) Securities Sold Under Agreements to Repurchase Securities Loaned Other Total U.S. government and agency securities $ 169,501 $ — $ 281 $ 169,782 Corporate securities, trading loans and other 8,933 1,339 443 10,715 Equity securities 30,483 17,892 21,479 69,854 Non-U.S. sovereign debt 95,997 5,320 55 101,372 Mortgage trading loans and ABS 5,162 — — 5,162 Total $ 310,076 $ 24,551 $ 22,258 $ 356,885 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 help ensure that 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.

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 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. For more information on commitments and contingencies, see Note 12 – Commitments and Contingencies to the Consolidated Financial Statements of the Corporation's 2016 Annual Report on Form 10-K. Credit Extension Commitments The Corporation enters into commitments to extend credit such as loan commitments, standby letters of credit (SBLCs) and commercial letters of credit to meet the financing needs of its customers. The table below 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 $11.3 billion and $12.1 billion at September 30, 2017 and December 31, 2016 . At September 30, 2017 , the carrying value of these commitments, excluding commitments accounted for under the fair value option, was $780 million , including deferred revenue of $18 million and a reserve for unfunded lending commitments of $762 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 table below also includes the notional amount of commitments of $4.9 billion and $7.0 billion at September 30, 2017 and December 31, 2016 that are accounted for under the fair value option. However, the table below excludes cumulative net fair value of $101 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 15 – Fair Value Option . Credit Extension Commitments September 30, 2017 (Dollars in millions) Expire in One Expire After One Expire After Three Expire After Five Total Notional amount of credit extension commitments Loan commitments $ 81,579 $ 133,609 $ 145,154 $ 18,639 $ 378,981 Home equity lines of credit 7,400 5,531 2,212 30,265 45,408 Standby letters of credit and other (1) 21,520 10,814 2,760 1,221 36,315 Letters of credit 1,220 102 95 80 1,497 Legally binding commitments 111,719 150,056 150,221 50,205 462,201 Credit card lines (2) 365,007 — — — 365,007 Total credit extension commitments $ 476,726 $ 150,056 $ 150,221 $ 50,205 $ 827,208 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 $26.5 billion and $8.2 billion at September 30, 2017 , and $25.5 billion and $8.3 billion at December 31, 2016 . Amounts in the table include consumer SBLCs of $375 million and $376 million at September 30, 2017 and December 31, 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 September 30, 2017 and December 31, 2016 , the Corporation had commitments to purchase loans (e.g., residential mortgage and commercial real estate) of $452 million and $767 million , and commitments to purchase commercial loans of $2.0 billion and $636 million , which upon settlement will be included in loans or LHFS. At September 30, 2017 and December 31, 2016 , the Corporation had commitments to purchase commodities, primarily liquefied natural gas of $1.6 billion and $1.9 billion , which upon settlement will be included in trading account assets. At September 30, 2017 and December 31, 2016 , the Corporation had commitments to enter into resale and forward-dated resale and securities borrowing agreements of $77.2 billion and $48.9 billion , and commitments to enter into forward-dated repurchase and securities lending agreements of $47.7 billion and $24.4 billion . These commitments expire primarily within the next 12 months. The Corporation has entered into agreements to purchase retail automotive 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 September 30, 2017 and December 31, 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 from a strategic partner up to $950 million for the remainder of 2017 , with this commitment expiring on December 31, 2017. The Corporation is a party to operating leases for certain of its premises and equipment. Commitments under these leases are approximately $576 million , $2.3 billion , $2.1 billion , $1.9 billion and $1.6 billion for the remainder of 2017 and the years through 2021 , respectively, and $5.8 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 September 30, 2017 and December 31, 2016 , the notional amount of these guarantees, which are recorded as derivatives totaled $14.0 billion and $13.9 billion . At both September 30, 2017 and December 31, 2016 , the Corporation’s maximum exposure related to these guarantees totaled $3.2 billion , with estimated maturity dates between 2031 and 2039. The net fair value including the fee receivable associated with these guarantees was $2 million and $4 million at September 30, 2017 and December 31, 2016 , and reflects the probability of surrender as well as the multiple structural protection features in the contracts. 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. For the three and nine months ended September 30, 2017 , the sponsored entities processed and settled $200.4 billion and $591.8 billion of transactions and recorded losses of $7 million and $22 million . For the three and nine months ended September 30, 2016 , the sponsored entities processed and settled $189.9 billion and $527.7 billion of transactions and recorded losses of $9 million and $23 million . A significant portion of this activity was processed by a joint venture in which the Corporation holds a 49 percent ownership, and is recorded in other assets on the Consolidated Balance Sheet and in All Other . At both September 30, 2017 and December 31, 2016 , the carrying value of the Corporation's investment in the merchant services joint venture was $2.9 billion . As of September 30, 2017 and December 31, 2016 , the maximum potential exposure for sponsored transactions totaled $334.9 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. 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 $6.5 billion and $6.7 billion at September 30, 2017 and December 31, 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 The following supplements the disclosure in Note 12 – Commitments and Contingencies to the Consolidated Financial Statements of the Corporation's 2016 Annual Report on Form 10-K and in Note 10 – Commitments and Contingencies to the Consolidated Financial Statements of the Corporation's Quarterly Report on Form 10-Q for the quarterly periods ended June 30, 2017 and March 31, 2017 (the prior commitments and contingencies disclosure). 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 matters will be, what the timing of the ultimate resolution of these matters will be, or what the expense, eventual loss, fines or penalties related to each 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 $140 million and $606 million was recognized for the three and nine months ended September 30, 2017 compared to $250 million and $908 million for the same periods in 2016. For a limited number of the matters disclosed in the prior commitments and contingencies disclosure, 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 previously 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 $1.5 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 has been provided in the prior commitments and contingencies disclosure 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 in the prior commitments and contingencies disclosure, 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.

Shareholders' Equity

Shareholders' Equity	9 Months Ended
	Sep. 30, 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 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 October 30, 2017 . During the three months ended September 30, 2017 , the Corporation repurchased and retired 124 million shares of common stock in connection with the 2017 Comprehensive Capital Analysis and Review capital plan, which reduced shareholders' equity by $3.0 billion . This includes shares repurchased to offset the dilution resulting from certain equity-based compensation awards. The Corporation has 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 150 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. As a result of the Corporation’s third-quarter 2017 dividend of $0.12 per common share, the exercise price of the warrants expiring on January 16, 2019 was adjusted to $12.807 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 amount of the preferred stock was $2.9 billion and, upon conversion, was recorded as additional paid-in capital. For additional information, see Note 13 - Earnings Per Common Share. During the nine months ended September 30, 2017 , in connection with employee stock plans, the Corporation issued approximately 66 million shares and repurchased approximately 27 million shares of its common stock to satisfy tax withholding obligations. At September 30, 2017 , the Corporation had reserved 873 million unissued shares of common stock for future issuances under employee stock plans, common stock warrants, convertible notes and preferred stock. Preferred Stock During the three and nine months ended September 30, 2017 , the Corporation recognized cash dividends of $465 million and $1.3 billion . There were no issuances of preferred stock during the nine months ended September 30, 2017 .

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	9 Months Ended
	Sep. 30, 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 the nine months ended September 30, 2017 and 2016 . (Dollars in millions) Debt Securities Available-for- Equity Securities Debit Valuation Adjustments Derivatives Employee Benefit Plans Foreign Currency (1) Total Balance, December 31, 2015 $ 16 $ 62 $ (611 ) $ (1,077 ) $ (2,956 ) $ (792 ) $ (5,358 ) Net change 3,362 (43 ) 49 277 29 (17 ) 3,657 Balance, September 30, 2016 $ 3,378 $ 19 $ (562 ) $ (800 ) $ (2,927 ) $ (809 ) $ (1,701 ) Balance, December 31, 2016 $ (1,299 ) $ 32 $ (767 ) $ (895 ) $ (3,480 ) $ (879 ) $ (7,288 ) Net change 945 (14 ) (149 ) 156 80 102 1,120 Balance, September 30, 2017 $ (354 ) $ 18 $ (916 ) $ (739 ) $ (3,400 ) $ (777 ) $ (6,168 ) 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 the nine months ended September 30, 2017 and 2016 . Changes in OCI Components Before- and After-tax Nine Months Ended September 30 2017 2016 (Dollars in millions) Before-tax Tax effect After-tax Before-tax Tax effect After-tax Debt securities: Net increase in fair value $ 1,757 $ (657 ) $ 1,100 $ 5,896 $ (2,239 ) $ 3,657 Reclassifications into earnings: Gains on sales of debt securities (278 ) 106 (172 ) (490 ) 186 (304 ) Other income 33 (16 ) 17 14 (5 ) 9 Net realized gains reclassified into earnings (245 ) 90 (155 ) (476 ) 181 (295 ) Net change 1,512 (567 ) 945 5,420 (2,058 ) 3,362 Available-for-sale marketable equity securities: Net increase (decrease) in fair value 45 (17 ) 28 (70 ) 27 (43 ) Net realized gains reclassified into earnings (2) (67 ) 25 (42 ) — — — Net change (22 ) 8 (14 ) (70 ) 27 (43 ) Debit valuation adjustments: Net increase (decrease) in fair value (255 ) 96 (159 ) 61 (23 ) 38 Net realized losses reclassified into earnings (2) 30 (20 ) 10 18 (7 ) 11 Net change (225 ) 76 (149 ) 79 (30 ) 49 Derivatives: Net increase (decrease) in fair value 79 (30 ) 49 (64 ) 23 (41 ) Reclassifications into earnings: Net interest income 274 (103 ) 171 447 (167 ) 280 Personnel (103 ) 39 (64 ) 61 (23 ) 38 Net realized losses reclassified into earnings 171 (64 ) 107 508 (190 ) 318 Net change 250 (94 ) 156 444 (167 ) 277 Employee benefit plans: Reclassifications into earnings: Prior service cost 3 (1 ) 2 3 (1 ) 2 Net actuarial losses 125 (47 ) 78 61 (24 ) 37 Net realized losses reclassified into earnings (3) 128 (48 ) 80 64 (25 ) 39 Settlements, curtailments and other — — — — (10 ) (10 ) Net change 128 (48 ) 80 64 (35 ) 29 Foreign currency: Net increase (decrease) in fair value (454 ) 462 8 123 (140 ) (17 ) Net gains reclassified into earnings (1,2) (608 ) 702 94 — — — Net change (1,062 ) 1,164 102 123 (140 ) (17 ) Total other comprehensive income (loss) $ 581 $ 539 $ 1,120 $ 6,060 $ (2,403 ) $ 3,657 (1) The nine months ended September 30, 2017 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 during the second quarter of 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.

Earnings Per Common Share

Earnings Per Common Share	9 Months Ended
	Sep. 30, 2017
Earnings Per Share [Abstract]
Earnings Per Common Share	Earnings Per Common Share The calculation of earnings per common share (EPS) and diluted EPS for the three and nine months ended September 30, 2017 and 2016 is presented below. For more information on the calculation of EPS, see Note 1 – Summary of Significant Accounting Principles to the Consolidated Financial Statements of the Corporation's 2016 Annual Report on Form 10-K . Three Months Ended September 30 Nine Months Ended September 30 (Dollars in millions, except per share information; shares in thousands) 2017 2016 2017 2016 Earnings per common share Net income $ 5,587 $ 4,955 $ 15,712 $ 13,210 Preferred stock dividends (465 ) (503 ) (1,328 ) (1,321 ) Net income applicable to common shareholders $ 5,122 $ 4,452 $ 14,384 $ 11,889 Average common shares issued and outstanding 10,197,891 10,250,124 10,103,386 10,312,878 Earnings per common share $ 0.50 $ 0.43 $ 1.42 $ 1.15 Diluted earnings per common share Net income applicable to common shareholders $ 5,122 $ 4,452 $ 14,384 $ 11,889 Add preferred stock dividends due to assumed conversions (1) 36 75 186 225 Net income allocated to common shareholders $ 5,158 $ 4,527 $ 14,570 $ 12,114 Average common shares issued and outstanding 10,197,891 10,250,124 10,103,386 10,312,878 Dilutive potential common shares (2) 527,591 750,349 717,039 733,929 Total diluted average common shares issued and outstanding 10,725,482 11,000,473 10,820,425 11,046,807 Diluted earnings per common share $ 0.48 $ 0.41 $ 1.35 $ 1.10 (1) Represents the Series T dividends under the "if-converted" method prior to conversion. (2) Includes incremental dilutive shares from restricted stock units, 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 the three and nine months ended September 30, 2016 , the 700 million average dilutive potential common shares were included in the diluted share count under the “if-converted” method. For both the three and nine months ended September 30, 2017 and 2016 , 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 the three and nine months ended September 30, 2017 , average options to purchase 18 million and 22 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 compared to 42 million and 46 million for the same periods in 2016 . For both the three and nine months ended September 30, 2017 and 2016 , 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, and average warrants to purchase 150 million shares of common stock were included in the diluted EPS calculation under the treasury stock method.

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 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 and conducts a review of its fair value hierarchy classifications on a quarterly basis. Transfers into or out of fair value hierarchy classifications are considered to be effective as of the beginning of the quarter in which they occur. During the nine months ended September 30, 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. For more information regarding the fair value hierarchy and how the Corporation measures fair value and valuation processes and techniques, see Note 1 – Summary of Significant Accounting Principles and Note 20 – Fair Value Measurements to the Consolidated Financial Statements of the Corporation's 2016 Annual Report on Form 10-K . The Corporation accounts for certain financial instruments under the fair value option. For additional information, see Note 15 – Fair Value Option . Recurring Fair Value Assets and liabilities carried at fair value on a recurring basis at September 30, 2017 and December 31, 2016 , including financial instruments which the Corporation accounts for under the fair value option, are summarized in the following tables. September 30, 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 $ — $ 56,780 $ — $ — $ 56,780 Trading account assets: U.S. Treasury and agency securities (2) 32,688 589 — — 33,277 Corporate securities, trading loans and other 535 27,760 1,742 — 30,037 Equity securities 58,886 29,149 244 — 88,279 Non-U.S. sovereign debt 16,623 14,346 552 — 31,521 Mortgage trading loans, MBS and ABS: U.S. government-sponsored agency guaranteed (2) — 18,973 — — 18,973 Mortgage trading loans, ABS and other MBS — 6,980 1,252 — 8,232 Total trading account assets (3) 108,732 97,797 3,790 — 210,319 Derivative assets (4, 5) 6,756 360,066 3,878 (332,316 ) 38,384 AFS debt securities: U.S. Treasury and agency securities 48,591 1,677 — — 50,268 Mortgage-backed securities: Agency — 196,194 — — 196,194 Agency-collateralized mortgage obligations — 7,049 — — 7,049 Non-agency residential — 2,657 — — 2,657 Commercial — 12,464 — — 12,464 Non-U.S. securities 774 4,630 36 — 5,440 Other taxable securities — 6,555 483 — 7,038 Tax-exempt securities — 18,725 467 — 19,192 Total AFS debt securities 49,365 249,951 986 — 300,302 Other debt securities carried at fair value: Mortgage-backed securities: Agency-collateralized mortgage obligations — 5 — — 5 Non-agency residential — 3,036 22 — 3,058 Non-U.S. securities 11,911 1,349 — — 13,260 Other taxable securities — 239 — — 239 Total other debt securities carried at fair value 11,911 4,629 22 — 16,562 Loans and leases — 5,667 618 — 6,285 Mortgage servicing rights (6) — — 2,407 — 2,407 Loans held-for-sale — 2,353 775 — 3,128 Customer and other receivables — 230 — — 230 Other assets 17,991 1,083 267 — 19,341 Total assets $ 194,755 $ 778,556 $ 12,743 $ (332,316 ) $ 653,738 Liabilities Interest-bearing deposits in U.S. offices $ — $ 468 $ — $ — $ 468 Federal funds purchased and securities loaned or sold under agreements to repurchase — 38,852 — — 38,852 Trading account liabilities: U.S. Treasury and agency securities 20,390 366 — — 20,756 Equity securities 31,647 4,018 — — 35,665 Non-U.S. sovereign debt 16,606 4,118 — — 20,724 Corporate securities and other 211 9,053 25 — 9,289 Total trading account liabilities 68,854 17,555 25 — 86,434 Derivative liabilities (4, 5) 6,589 349,863 5,901 (330,572 ) 31,781 Short-term borrowings — 1,904 — — 1,904 Accrued expenses and other liabilities 21,121 1,239 9 — 22,369 Long-term debt — 28,007 1,890 — 29,897 Total liabilities $ 96,564 $ 437,888 $ 7,825 $ (330,572 ) $ 211,705 (1) Amounts represent the impact of legally enforceable master netting agreements and also cash collateral held or placed with the same counterparties. (2) Includes $19.5 billion of GSE obligations. (3) Includes securities with a fair value of $15.3 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 the nine months ended September 30, 2017 , $3.0 billion of derivative assets and $2.4 billion of derivative liabilities were transferred from Level 1 to Level 2 and $543 million of derivative assets and $496 million of derivative liabilities were transferred from Level 2 to Level 1 based on the inputs used to measure fair value. For further disaggregation of derivative assets and liabilities, see Note 2 – Derivatives . (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 $162 million non-core MSR portfolio held in All Other and the $518 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 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 the three and nine months ended September 30, 2017 and 2016 , including net realized and unrealized gains (losses) included in earnings and accumulated OCI. Level 3 – Fair Value Measurements (1) Three Months Ended September 30, 2017 Gross (Dollars in millions) Balance July 1 2017 Total Realized/Unrealized Gains/(Losses) (2) Gains (3) Purchases Sales Issuances Settlements Gross Level 3 Gross Level 3 Balance Change in Unrealized Gains/(Losses) Related to Financial Instruments Still Held (2) Trading account assets: Corporate securities, trading loans and other $ 1,777 $ 77 $ — $ 35 $ (79 ) $ 5 $ (208 ) $ 288 $ (153 ) $ 1,742 $ 35 Equity securities 229 8 — 3 (3 ) — — 17 (10 ) 244 10 Non-U.S. sovereign debt 506 33 18 — — — (5 ) — — 552 33 Mortgage trading loans, ABS and other MBS 1,232 10 (1 ) 150 (157 ) — (46 ) 83 (19 ) 1,252 (2 ) Total trading account assets 3,744 128 17 188 (239 ) 5 (259 ) 388 (182 ) 3,790 76 Net derivative assets (4) (1,803 ) (252 ) — 150 (367 ) — 278 7 (36 ) (2,023 ) (283 ) AFS debt securities: Non-U.S. securities 139 1 4 7 — — (115 ) — — 36 — Other taxable securities 483 — 1 — — — (1 ) — — 483 — Tax-exempt securities 518 — 1 — — — (7 ) — (45 ) 467 — Total AFS debt securities 1,140 1 6 7 — — (123 ) — (45 ) 986 — Other debt securities carried at fair value – Non-agency residential MBS 23 — — — — — (1 ) — — 22 — Loans and leases (5, 6) 667 2 — 2 (24 ) — (29 ) — — 618 2 Mortgage servicing rights (6, 7) 2,501 54 — — (28 ) 69 (189 ) — — 2,407 (20 ) Loans held-for-sale (5) 766 38 10 — (4 ) — (93 ) 58 — 775 27 Other assets 294 70 (43 ) — (52 ) — (2 ) — — 267 28 Federal funds purchased and securities loaned or sold under agreements to repurchase (5) (135 ) — — — — — 135 — — — — Trading account liabilities – Corporate securities and other (22 ) 1 — — (3 ) (1 ) — — — (25 ) — Accrued expenses and other liabilities (5) (9 ) — — — — — — — — (9 ) — Long-term debt (5) (1,646 ) (87 ) (7 ) 63 — (129 ) 115 (244 ) 45 (1,890 ) (87 ) (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 (losses); Net derivative assets - primarily trading account profits (losses) and mortgage banking income (loss); MSRs - primarily mortgage banking income (loss); Long-term debt - trading account profits (losses). 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 gains/losses in OCI related to unrealized gains/losses 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 additional information, see Note 1 – Summary of Significant Accounting Principles to the Consolidated Financial Statements of the Corporation's 2016 Annual Report on Form 10-K. (4) Net derivatives include derivative assets of $3.9 billion and derivative liabilities of $5.9 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 the three months ended September 30, 2017 included $388 million of trading account assets and $244 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 the three months ended September 30, 2017 included $182 million of trading account assets. Level 3 – Fair Value Measurements (1) Three Months Ended September 30, 2016 Gross (Dollars in millions) Balance 2016 Total Realized/Unrealized Gains/(Losses) (2) Gains (3) Purchases Sales Issuances Settlements Gross Level 3 Gross Level 3 Balance 2016 Change in Unrealized Gains/(Losses) Related to Financial Instruments Still Held (2) Trading account assets: Corporate securities, trading loans and other $ 2,654 $ 57 $ — $ 226 $ (245 ) $ — $ (134 ) $ 202 $ (198 ) $ 2,562 $ 20 Equity securities 455 11 — 10 (98 ) — — 27 (39 ) 366 5 Non-U.S. sovereign debt 630 20 (7 ) — — — (4 ) — — 639 19 Mortgage trading loans, ABS and other MBS 1,286 102 — 331 (441 ) — (103 ) 15 (24 ) 1,166 62 Total trading account assets 5,025 190 (7 ) 567 (784 ) — (241 ) 244 (261 ) 4,733 106 Net derivative assets (4) (648 ) (131 ) — 114 (346 ) — 118 (53 ) (41 ) (987 ) (198 ) AFS debt securities: Non-agency residential MBS 134 — — 189 — — (102 ) 6 — 227 — Other taxable securities 717 1 (1 ) — — — (30 ) — — 687 — Tax-exempt securities 559 — 2 — — — — 10 — 571 — Total AFS debt securities 1,410 1 1 189 — — (132 ) 16 — 1,485 — Other debt securities carried at fair value – Non-agency residential MBS 28 (2 ) — — — — — — — 26 — Loans and leases (5, 6) 1,459 (9 ) — — — — (54 ) — (41 ) 1,355 (8 ) Mortgage servicing rights (6, 7) 2,269 313 — — — 101 (206 ) — — 2,477 262 Loans held-for-sale (5) 690 13 (4 ) — (56 ) — (25 ) 4 (35 ) 587 10 Other assets 348 11 — 4 — — — — — 363 17 Federal funds purchased and securities loaned or sold under agreements to repurchase (5) (313 ) (17 ) — — — — 10 (19 ) 1 (338 ) (17 ) Trading account liabilities – Corporate securities and other (26 ) 2 — — (2 ) — — — — (26 ) 1 Accrued expenses and other liabilities (5) (9 ) — — — — — — — — (9 ) — Long-term debt (5) (2,156 ) (22 ) (23 ) 15 — (3 ) 363 (206 ) 98 (1,934 ) (24 ) (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 (losses); Net derivative assets - primarily trading account profits (losses) and mortgage banking income (loss); MSRs - primarily mortgage banking income (loss); Long-term debt - trading account profits (losses). 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 gains/losses in OCI related to unrealized gains/losses 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 additional information, see Note 1 – Summary of Significant Accounting Principles to the Consolidated Financial Statements of the Corporation's 2016 Annual Report on Form 10-K. (4) Net derivatives include derivative assets of $4.9 billion and derivative liabilities of $5.9 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 the three months ended September 30, 2016 included $244 million of trading account assets and $206 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 the three months ended September 30, 2016 included $261 million of trading account assets. Level 3 – Fair Value Measurements (1) Nine Months Ended September 30, 2017 Gross (Dollars in millions) Balance January 1 2017 Total Realized/Unrealized Gains/(Losses) (2) Gains (3) Purchases Sales Issuances Settlements Gross Level 3 Gross Level 3 Balance Change in Unrealized Gains/(Losses) Related to Financial Instruments Still Held (2) Trading account assets: Corporate securities, trading loans and other $ 2,777 $ 225 $ — $ 353 $ (679 ) $ 5 $ (443 ) $ 506 $ (1,002 ) $ 1,742 $ 72 Equity securities 281 23 — 45 (67 ) — (10 ) 119 (147 ) 244 11 Non-U.S. sovereign debt 510 64 12 26 (59 ) — (73 ) 72 — 552 60 Mortgage trading loans, ABS and other MBS 1,211 195 (2 ) 747 (846 ) — (169 ) 187 (71 ) 1,252 107 Total trading account assets 4,779 507 10 1,171 (1,651 ) 5 (695 ) 884 (1,220 ) 3,790 250 Net derivative assets (4) (1,313 ) (1,098 ) — 558 (843 ) — 722 36 (85 ) (2,023 ) (561 ) AFS debt securities: Non-U.S. securities 229 2 16 49 — — (260 ) — — 36 — Other taxable securities 594 3 6 5 — — (31 ) — (94 ) 483 — Tax-exempt securities 542 — 1 — (56 ) — (10 ) 35 (45 ) 467 — Total AFS debt securities 1,365 5 23 54 (56 ) — (301 ) 35 (139 ) 986 — Other debt securities carried at fair value – Non-agency residential MBS 25 (1 ) — — — — (2 ) — — 22 — Loans and leases (5, 6) 720 20 — 2 (24 ) — (93 ) — (7 ) 618 18 Mortgage servicing rights (6, 7) 2,747 40 — — (22 ) 207 (565 ) — — 2,407 (202 ) Loans held-for-sale (5) 656 109 7 2 (159 ) — (281 ) 473 (32 ) 775 60 Other assets 239 53 (31 ) 2 (52 ) — (8 ) 64 — 267 21 Federal funds purchased and securities loaned or sold under agreements to repurchase (5) (359 ) (5 ) — — — (12 ) 171 (58 ) 263 — (5 ) Trading account liabilities – Corporate securities and other (27 ) 13 — 4 (13 ) (2 ) — — — (25 ) (1 ) Accrued expenses and other liabilities (5) (9 ) — — — — — — — — (9 ) — Long-term debt (5) (1,514 ) (160 ) (18 ) 81 — (279 ) 398 (530 ) 132 (1,890 ) (158 ) (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 (losses); Net derivative assets - primarily trading account profits (losses) and mortgage banking income (loss); MSRs - primarily mortgage banking income (loss); Long-term debt - trading account profits (losses). 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 gains/losses in OCI related to unrealized gains/losses 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 additional information, see Note 1 – Summary of Significant Accounting Principles to the Consolidated Financial Statements of the Corporation's 2016 Annual Report on Form 10-K. (4) Net derivatives include derivative assets of $3.9 billion and derivative liabilities of $5.9 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 the nine months ended September 30, 2017 included $884 million of trading account assets, $473 million of LHFS and $530 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 the nine months ended September 30, 2017 included $1.2 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 $132 million of long-term debt. Level 3 – Fair Value Measurements (1) Nine Months Ended September 30, 2016 Gross (Dollars in millions) Balance 2016 Total Realized/Unrealized Gains/(Losses) (2) Gains (3) Purchases Sales Issuances Settlements Gross Level 3 Gross Level 3 Balance 2016 Change in Unrealized Gains/(Losses) Related to Financial Instruments Still Held (2) Trading account assets: Corporate securities, trading loans and other $ 2,838 $ 118 $ 2 $ 925 $ (638 ) $ — $ (479 ) $ 432 $ (636 ) $ 2,562 $ 11 Equity securities 407 93 — 53 (135 ) — (72 ) 60 (40 ) 366 (19 ) Non-U.S. sovereign debt 521 112 91 3 (1 ) — (87 ) — — 639 110 Mortgage trading loans, ABS and other MBS 1,868 197 (2 ) 681 (1,264 ) — (270 ) 91 (135 ) 1,166 110 Total trading account assets 5,634 520 91 1,662 (2,038 ) — (908 ) 583 (811 ) 4,733 212 Net derivative assets (4) (441 ) 356 — 313 (965 ) — 7 (177 ) (80 ) (987 ) (108 ) AFS debt securities: Non-agency residential MBS 106 — 3 385 (92 ) — (181 ) 6 — 227 — Other taxable securities 757 3 (7 ) — — — (66 ) — — 687 — Tax-exempt securities 569 — (8 ) 1 — — (1 ) 10 — 571 — Total AFS debt securities 1,432 3 (12 ) 386 (92 ) — (248 ) 16 — 1,485 — Other debt securities carried at fair value – Non-agency residential MBS 30 (4 ) — — — — — — — 26 — Loans and leases (5, 6) 1,620 (13 ) — 69 — 50 (143 ) 6 (234 ) 1,355 (3 ) Mortgage servicing rights (6, 7) 3,087 (295 ) — — — 307 (622 ) — — 2,477 (457 ) Loans held-for-sale (5) 787 97 51 20 (236 ) — (77 ) 43 (98 ) 587 76 Other assets 374 (27 ) — 38 — — (24 ) 2 — 363 (15 ) Federal funds purchased and securities loaned or sold under agreements to repurchase (5) (335 ) 12 — — — (14 ) 17 (19 ) 1 (338 ) (21 ) Trading account liabilities – Corporate securities and other (21 ) 4 — 1 (10 ) — — — — (26 ) 3 Short-term borrowings (5) (30 ) 1 — — — — 29 — — — — Accrued expenses and other liabilities (5) (9 ) — — — — — — — — (9 ) — Long-term debt (5) (1,513 ) (192 ) (41 ) 44 — (326 ) 496 (751 ) 349 (1,934 ) (208 ) (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 (losses); Net derivative assets - primarily trading account profits (losses) and mortgage banking income (loss); MSRs - primarily mortgage banking income (loss); Long-term debt - primarily trading account profits (losses). 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 gains/losses in OCI related to unrealized gains/losses 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 additional information, see Note 1 – Summary of Significant Accounting Principles to the Consolidated Financial Statements of the Corporation's 2016 Annual Report on Form 10-K. (4) Net derivatives include derivative assets of $4.9 billion and derivative liabilities of $5.9 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 the nine months ended September 30, 2016 included $583 million of trading account assets, $177 million of net derivative assets and $751 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 the nine months ended September 30, 2016 included $811 million of trading account assets, $234 million of loans and leases and $349 million 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 September 30, 2017 and December 31, 2016 . Quantitative Information about Level 3 Fair Value Measurements at September 30, 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 $ 914 Discounted cash flow Yield 0% to 25% 6 % Trading account assets – Mortgage trading loans, ABS and other MBS 293 Prepayment speed 0% to 22% CPR 12 % Loans and leases 617 Default rate 0% to 3% CDR 2 % Loans held-for-sale 4 Loss severity 0% to 54% 18 % Instruments backed by commercial real estate assets $ 264 Discounted cash flow Yield 0% to 25% 6 % Trading account assets – Corporate securities, trading loans and other 218 Price $0 to $100 $68 Trading account assets – Mortgage trading loans, ABS and other MBS 46 Commercial loans, debt securities and other $ 3,754 Discounted cash flow, Market comparables Yield 0% to 12% 4 % Trading account assets – Corporate securities, trading loans and other 1,498 Prepayment speed 10% to 20% 15 % Trading account assets – Non-U.S. sovereign debt 552 Default rate 3% to 4% 4 % Trading account assets – Mortgage trading loans, ABS and other MBS 913 Loss severity 35% to 40% 37 % AFS debt securities – Other taxable securities 19 Price $0 to $185 $63 Loans and leases 1 Loans held-for-sale 771 Auction rate securities $ 957 Discounted cash flow, Market comparables Price $10 to $100 $94 Trading account assets – Corporate securities, trading loans and other 26 AFS debt securities – Other taxable securities 464 AFS debt securities – Tax-exempt securities 467 MSRs $ 2,407 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 $ (1,890 ) Discounted cash flow, Market comparables, Industry standard derivative pricing (2) Equity correlation 3% to 100% 64 % Long-dated equity volatilities 4% to 76% 22 % Yield 7.5 % n/a Price $0 to $100 $65 Net derivative assets Credit derivatives $ (325 ) Discounted cash flow, Stochastic recovery correlation model Yield 1% to 5% 3 % Upfront points 0 points to 100 points 73 points Credit correlation 12% to 90% 58 % Prepayment speed 15% to 20% CPR 16 % Default rate 1% to 4% CDR 2 % Loss severity 35 % n/a Price $0 to $102 $76 Equity derivatives $ (2,235 ) Industry standard derivative pricing (2) Equity correlation 3% to 100% 64 % Long-dated equity volatilities 4% to 76% 22 % Commodity derivatives $ 2 Discounted cash flow, Industry standard derivative pricing (2) Natural gas forward price $2/MMBtu to $6/MMBtu $3/MMBtu Correlation 68% to 90% 85 % Volatilities 25% to 90% 49 % Interest rate derivatives $ 535 Industry standard derivative pricing (3) Correlation (IR/IR) 15% to 90% 53 % Correlation (FX/IR) 0% to 46% 1 % Long-dated inflation rates -10% to 38% 6 % Long-dated inflation volatilities 0% to 1% 1 % Total net derivative assets $ (2,023 ) (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 114 : Trading account assets – Corporate securities, trading loans and other of $1.7 billion , Trading account assets – Non-U.S. sovereign debt of $552 million , Trading account assets – Mortgage trading loans, ABS and other MBS of $1.3 billion , AFS debt securities – Other taxable securities of $483 million , AFS debt securities – Tax-exempt securities of $467 million , Loans and leases of $618 million and LHFS of $775 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 Discoun

Fair Value Option

Fair Value Option	9 Months Ended
	Sep. 30, 2017
Fair Value Option [Abstract]
Fair Value Option	Fair Value Option The Corporation elects to account for certain financial instruments under the fair value option. For more information on the primary financial instruments for which the fair value option elections have been made, see Note 21 – Fair Value Option to the Consolidated Financial Statements of the Corporation's 2016 Annual Report on Form 10-K. The following tables provide information about the fair value carrying amount and the contractual principal outstanding of assets and liabilities accounted for under the fair value option at September 30, 2017 and December 31, 2016 , and 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 the three and nine months ended September 30, 2017 and 2016 . Fair Value Option Elections September 30, 2017 December 31, 2016 (Dollars in millions) 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 Federal funds sold and securities borrowed or purchased under agreements to resell $ 56,780 $ 56,720 $ 60 $ 49,750 $ 49,615 $ 135 Loans reported as trading account assets (1) 5,734 10,749 (5,015 ) 6,215 11,557 (5,342 ) Trading inventory – other 11,096 n/a n/a 8,206 n/a n/a Consumer and commercial loans 6,285 6,332 (47 ) 7,085 7,190 (105 ) Loans held-for-sale 3,128 4,751 (1,623 ) 4,026 5,595 (1,569 ) Customer receivables and other assets 233 230 3 253 250 3 Long-term deposits 468 433 35 731 672 59 Federal funds purchased and securities loaned or sold under agreements to repurchase 38,852 38,861 (9 ) 35,766 35,929 (163 ) Short-term borrowings 1,904 1,904 — 2,024 2,024 — Unfunded loan commitments 101 n/a n/a 173 n/a n/a Long-term debt (2) 29,897 30,497 (600 ) 30,037 29,862 175 (1) A significant portion of the loans reported as trading account assets are distressed loans which 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 $29.5 billion and $29.7 billion , and contractual principal outstanding of $30.1 billion and $29.5 billion at September 30, 2017 and December 31, 2016 . n/a = not applicable Gains (Losses) Relating to Assets and Liabilities Accounted for Under the Fair Value Option Three Months Ended September 30, 2017 (Dollars in millions) Trading Account Profits Mortgage Banking Income (Loss) Other Income Total Loans reported as trading account assets $ 75 $ — $ — $ 75 Trading inventory – other (1) 1,217 — — 1,217 Loans held-for-sale (2) — 73 19 92 Unfunded loan commitments — — 21 21 Long-term debt (3, 4) (416 ) — (38 ) (454 ) Other (5) 3 — (3 ) — Total $ 879 $ 73 $ (1 ) $ 951 Three Months Ended September 30, 2016 Loans reported as trading account assets $ 125 $ — $ — $ 125 Trading inventory – other (1) 907 — — 907 Loans held-for-sale (2) 5 132 2 139 Unfunded loan commitments — — 133 133 Long-term debt (3, 4) (138 ) — (24 ) (162 ) Other (5) (32 ) — 40 8 Total $ 867 $ 132 $ 151 $ 1,150 Nine Months Ended September 30, 2017 Loans reported as trading account assets $ 272 $ — $ — $ 272 Trading inventory – other (1) 2,890 — — 2,890 Loans held-for-sale (2) — 182 93 275 Unfunded loan commitments — — 55 55 Long-term debt (3, 4) (471 ) — (109 ) (580 ) Other (5) (41 ) — 44 3 Total $ 2,650 $ 182 $ 83 $ 2,915 Nine Months Ended September 30, 2016 Loans reported as trading account assets $ 251 $ — $ — $ 251 Trading inventory – other (1) 551 — — 551 Loans held-for-sale (2) 10 493 57 560 Unfunded loan commitments — — 444 444 Long-term debt (3, 4) (718 ) — (77 ) (795 ) Other (5) (7 ) — (14 ) (21 ) Total $ 87 $ 493 $ 410 $ 990 (1) The gains (losses) in trading account profits are primarily offset by gains (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 12 – Accumulated Other Comprehensive Income (Loss) . For information on how the Corporation’s own credit spread is determined, see Note 20 – Fair Value Measurements to the Consolidated Financial Statements of the Corporation's 2016 Annual Report on Form 10-K. (5) Includes gains (losses) on federal funds sold and securities borrowed or purchased under agreements to resell, consumer and commercial loans, other assets, short-term borrowings, long-term deposits, and federal funds purchased and securities loaned or sold under agreements to repurchase. Gains (Losses) Related to Borrower-specific Credit Risk for Assets Accounted for Under the Fair Value Option Three Months Ended September 30 Nine Months Ended September 30 (Dollars in millions) 2017 2016 2017 2016 Loans reported as trading account assets $ 5 $ — $ 25 $ 5 Consumer and commercial loans (10 ) 14 31 (25 ) Loans held-for-sale (2 ) (10 ) (3 ) (6 )

Fair Value of Financial Instrum

Fair Value of Financial Instruments	9 Months Ended
	Sep. 30, 2017
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	Fair Value of Financial Instruments Financial instruments are classified into three levels based on the established fair value hierarchy. For additional information, see Note 1 – Summary of Significant Accounting Principles to the Consolidated Financial Statements of the Corporation's 2016 Annual Report on Form 10-K. The following disclosures include financial instruments that are not carried at fair value or only a portion of the ending balance at September 30, 2017 and December 31, 2016 is carried at fair value on the Consolidated Balance Sheet. For more information on these financial instruments and their valuation methodologies, see Note 20 – Fair Value Measurements and Note 22 – Fair Value of Financial Instruments to the Consolidated Financial Statements of the Corporation's 2016 Annual Report on Form 10-K. 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 September 30, 2017 and December 31, 2016 are presented in the following table. Fair Value of Financial Instruments September 30, 2017 Fair Value (Dollars in millions) Carrying Value Level 2 Level 3 Total Financial assets Loans $ 895,155 $ 69,711 $ 839,931 $ 909,642 Loans held-for-sale 13,243 12,261 1,012 13,273 Financial liabilities Deposits 1,284,417 1,284,397 — 1,284,397 Long-term debt 228,666 234,878 1,890 236,768 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 were generally determined using a discounted cash flow valuation approach which is applied using market-based credit default swaps 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 $863 million and $3.8 billion at September 30, 2017 , and $937 million and $4.9 billion at December 31, 2016 . Commercial unfunded lending commitments are primarily classified as Level 3. The carrying value of these commitments is classified in accrued expenses and other liabilities. 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 10 – Commitments and Contingencies .

Business Segment Information

Business Segment Information	9 Months Ended
	Sep. 30, 2017
Segment Reporting [Abstract]
Business Segment Information	Business Segment Information The Corporation reports its results of operations through the following four business segments: Consumer Banking , GWIM , Global Banking and Global Markets , with the remaining operations recorded in All Other . For additional information, see Note 24 – Business Segment Information to the Consolidated Financial Statements of the Corporation's 2016 Annual Report on Form 10-K. The tables below present net income (loss) and the components thereto (with net interest income on an FTE basis) for the three and nine months ended September 30, 2017 and 2016 , and total assets at September 30, 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 three months ended September 30 Total Corporation (1) Consumer Banking (Dollars in millions) 2017 2016 2017 2016 Net interest income (FTE basis) $ 11,401 $ 10,429 $ 6,211 $ 5,289 Noninterest income 10,678 11,434 2,563 2,679 Total revenue, net of interest expense (FTE basis) 22,079 21,863 8,774 7,968 Provision for credit losses 834 850 967 698 Noninterest expense 13,139 13,481 4,459 4,371 Income before income taxes (FTE basis) 8,106 7,532 3,348 2,899 Income tax expense (FTE basis) 2,519 2,577 1,261 1,086 Net income $ 5,587 $ 4,955 $ 2,087 $ 1,813 Period-end total assets $ 2,283,896 $ 2,195,314 $ 742,513 $ 687,241 Global Wealth & Global Banking 2017 2016 2017 2016 Net interest income (FTE basis) $ 1,496 $ 1,394 $ 2,743 $ 2,470 Noninterest income 3,124 2,985 2,243 2,276 Total revenue, net of interest expense (FTE basis) 4,620 4,379 4,986 4,746 Provision for credit losses 16 7 48 118 Noninterest expense 3,370 3,255 2,118 2,152 Income before income taxes (FTE basis) 1,234 1,117 2,820 2,476 Income tax expense (FTE basis) 465 419 1,062 925 Net income $ 769 $ 698 $ 1,758 $ 1,551 Period-end total assets $ 276,187 $ 289,794 $ 423,185 $ 397,869 Global Markets All Other 2017 2016 2017 2016 Net interest income (FTE basis) $ 899 $ 1,119 $ 52 $ 157 Noninterest income 3,001 3,239 (253 ) 255 Total revenue, net of interest expense (FTE basis) 3,900 4,358 (201 ) 412 Provision for credit losses (6 ) 19 (191 ) 8 Noninterest expense 2,710 2,656 482 1,047 Income (loss) before income taxes (FTE basis) 1,196 1,683 (492 ) (643 ) Income tax expense (benefit) (FTE basis) 440 609 (709 ) (462 ) Net income (loss) $ 756 $ 1,074 $ 217 $ (181 ) Period-end total assets $ 629,270 $ 595,165 $ 212,741 $ 225,245 (1) There were no material intersegment revenues. Results of Business Segments and All Other At and for the nine months ended September 30 Total Corporation (1) Consumer Banking (Dollars in millions) 2017 2016 2017 2016 Net interest income (FTE basis) $ 33,879 $ 31,470 $ 17,953 $ 15,825 Noninterest income 33,711 32,907 7,614 7,795 Total revenue, net of interest expense (FTE basis) 67,590 64,377 25,567 23,620 Provision for credit losses 2,395 2,823 2,639 1,955 Noninterest expense 41,713 41,790 13,280 13,324 Income before income taxes (FTE basis) 23,482 19,764 9,648 8,341 Income tax expense (FTE basis) 7,770 6,554 3,638 3,088 Net income $ 15,712 $ 13,210 $ 6,010 $ 5,253 Period-end total assets $ 2,283,896 $ 2,195,314 $ 742,513 $ 687,241 Global Wealth & Global Banking 2017 2016 2017 2016 Net interest income (FTE basis) $ 4,653 $ 4,310 $ 8,229 $ 7,440 Noninterest income 9,254 8,963 6,751 6,456 Total revenue, net of interest expense (FTE basis) 13,907 13,273 14,980 13,896 Provision for credit losses 50 46 80 870 Noninterest expense 10,091 9,816 6,435 6,450 Income before income taxes (FTE basis) 3,766 3,411 8,465 6,576 Income tax expense (FTE basis) 1,420 1,270 3,192 2,435 Net income $ 2,346 $ 2,141 $ 5,273 $ 4,141 Period-end total assets $ 276,187 $ 289,794 $ 423,185 $ 397,869 Global Markets All Other 2017 2016 2017 2016 Net interest income (FTE basis) $ 2,812 $ 3,391 $ 232 $ 504 Noninterest income 9,743 9,227 349 466 Total revenue, net of interest expense (FTE basis) 12,555 12,618 581 970 Provision for credit losses 2 23 (376 ) (71 ) Noninterest expense 8,117 7,690 3,790 4,510 Income (loss) before income taxes (FTE basis) 4,436 4,905 (2,833 ) (3,469 ) Income tax expense (benefit) (FTE basis) 1,553 1,746 (2,033 ) (1,985 ) Net income (loss) $ 2,883 $ 3,159 $ (800 ) $ (1,484 ) Period-end total assets $ 629,270 $ 595,165 $ 212,741 $ 225,245 Business Segment Reconciliations Three Months Ended September 30 Nine Months Ended September 30 2017 2016 2017 2016 Segments’ total revenue, net of interest expense (FTE basis) $ 22,280 $ 21,451 $ 67,009 $ 63,407 Adjustments (2) : ALM activities 273 (43 ) 332 (12 ) Liquidating businesses and other (474 ) 455 249 982 FTE basis adjustment (240 ) (228 ) (674 ) (666 ) Consolidated revenue, net of interest expense $ 21,839 $ 21,635 $ 66,916 $ 63,711 Segments’ total net income 5,370 5,136 16,512 14,694 Adjustments, net-of-taxes (2) : ALM activities 57 (136 ) (208 ) (453 ) Liquidating businesses and other 160 (45 ) (592 ) (1,031 ) Consolidated net income $ 5,587 $ 4,955 $ 15,712 $ 13,210 September 30 2017 2016 Segments’ total assets $ 2,071,155 $ 1,970,069 Adjustments (2) : ALM activities, including securities portfolio 635,305 616,730 Liquidating businesses and other 92,443 116,989 Elimination of segment asset allocations to match liabilities (515,007 ) (508,474 ) Consolidated total assets $ 2,283,896 $ 2,195,314 (1) There were no material intersegment revenues. (2) Adjustments include consolidated income, expense and asset amounts not specifically allocated to individual business segments.

Summary of Significant Accoun25

Summary of Significant Accounting Principles (Policies)	9 Months Ended
	Sep. 30, 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 differ from those estimates and assumptions. These unaudited Consolidated Financial Statements should be read in conjunction with the audited Consolidated Financial Statements of the Corporation's 2016 Annual Report on Form 10-K. The nature of the Corporation's business is such that the results of any interim period are not necessarily indicative of results for a full year. In the opinion of management, all adjustments, which consist of normal recurring adjustments necessary for a fair statement of the interim period results have been made. The Corporation evaluates subsequent events through the date of filing with the Securities and Exchange Commission. Certain prior-period amounts have been reclassified to conform to current period presentation.
New Accounting Pronouncements	Accounting for Financial Instruments -- Credit Losses The Financial Accounting Standards Board (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. Hedge Accounting The FASB issued a new accounting standard effective on January 1, 2019, with early adoption permitted, that makes targeted improvements to simplify the application of hedge accounting guidance. The Corporation is evaluating the timing of adoption. The ongoing implementation efforts include identifying current hedge strategies and systems and processes that will need to be modified to comply with the standard, which could impact the timing of adoption. 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. 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. This new accounting standard uses a modified retrospective transition that will be applied to all prior periods presented. The Corporation is in the process of reviewing its existing lease portfolios, as well as other service contracts for embedded leases, to evaluate the impact of the new accounting standard on the financial statements, as well as the impact to regulatory capital and risk-weighted assets. The effect of the adoption will depend on its lease portfolio at the time of transition; 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. Recognition and Measurement of Financial Assets and Financial Liabilities The FASB issued a new accounting standard effective on January 1, 2018, with early adoption permitted for the provisions related to debit valuation adjustments (DVA), on recognition and measurement of financial instruments, including certain equity investments and financial liabilities recorded at fair value under the fair value option. In 2015, the Corporation early adopted, retrospective to January 1, 2015, the provisions of this new accounting standard related to DVA on financial liabilities accounted for under the fair value option. The Corporation does not expect the remaining provisions of this 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. Revenue Recognition The FASB issued a new accounting standard effective on January 1, 2018 for recognizing revenue from contracts with customers. The customer contracts within the scope of the new standard have been identified, and the Corporation's current evaluation indicates that the new standard will not impact the timing or measurement of its revenue recognition. The Corporation continues to evaluate the presentation of certain costs as either operating expenses or net against noninterest income; consequently, there may be an insignificant change in the Consolidated Statement of Income for the presentation of these costs. Overall, 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.

Derivatives (Tables)

Derivatives (Tables)	9 Months Ended
	Sep. 30, 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 September 30, 2017 and December 31, 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. September 30, 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) $ 18,602.5 $ 179.5 $ 5.1 $ 184.6 $ 176.7 $ 1.3 $ 178.0 Futures and forwards (2) 5,957.2 0.9 — 0.9 0.8 — 0.8 Written options 1,467.4 — — — 36.3 — 36.3 Purchased options 1,390.7 38.5 — 38.5 — — — Foreign exchange contracts Swaps 2,011.9 36.6 2.5 39.1 37.0 3.1 40.1 Spot, futures and forwards 4,313.6 46.6 0.9 47.5 46.9 0.8 47.7 Written options 367.3 — — — 5.7 — 5.7 Purchased options 335.7 5.2 — 5.2 — — — Equity contracts Swaps 236.2 4.6 — 4.6 4.6 — 4.6 Futures and forwards 100.9 1.9 — 1.9 1.2 — 1.2 Written options 524.9 — — — 25.1 — 25.1 Purchased options 467.0 25.2 — 25.2 — — — Commodity contracts Swaps 47.6 1.7 — 1.7 4.2 — 4.2 Futures and forwards 51.5 3.5 — 3.5 0.6 — 0.6 Written options 25.0 — — — 1.2 — 1.2 Purchased options 26.1 1.4 — 1.4 — — — Credit derivatives (3) Purchased credit derivatives: Credit default swaps (2) 522.8 4.8 — 4.8 11.2 — 11.2 Total return swaps/other 57.6 0.1 — 0.1 1.3 — 1.3 Written credit derivatives: Credit default swaps (2) 514.5 10.9 — 10.9 4.2 — 4.2 Total return swaps/other 55.3 0.8 — 0.8 0.2 — 0.2 Gross derivative assets/liabilities $ 362.2 $ 8.5 $ 370.7 $ 357.2 $ 5.2 $ 362.4 Less: Legally enforceable master netting agreements (2) (296.7 ) (296.7 ) Less: Cash collateral received/paid (2) (35.6 ) (33.9 ) Total derivative assets/liabilities $ 38.4 $ 31.8 (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 $6.2 billion and $494.1 billion at September 30, 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/other 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/other 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 the three and nine months ended September 30, 2017 and 2016 , 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) Three Months Ended September 30, 2017 Nine Months Ended September 30, 2017 (Dollars in millions) Derivative Hedged Hedge Derivative Hedged Hedge Interest rate risk on long-term debt (1) $ (273 ) $ 169 $ (104 ) $ (751 ) $ 313 $ (438 ) Interest rate and foreign currency risk on long-term debt (1) 607 (593 ) 14 1,631 (1,603 ) 28 Interest rate risk on available-for-sale securities (2) (8 ) 7 (1 ) (71 ) 40 (31 ) Price risk on commodity inventory (3) — (1 ) (1 ) 8 (8 ) — Total $ 326 $ (418 ) $ (92 ) $ 817 $ (1,258 ) $ (441 ) Three Months Ended September 30, 2016 Nine Months Ended September 30, 2016 Interest rate risk on long-term debt (1) $ (758 ) $ 580 $ (178 ) $ 3,166 $ (3,654 ) $ (488 ) Interest rate and foreign currency risk on long-term debt (1) 16 (10 ) 6 360 (369 ) (9 ) Interest rate risk on available-for-sale securities (2) 235 (250 ) (15 ) (131 ) 80 (51 ) Price risk on commodity inventory (3) 6 (6 ) — — — — Total $ (501 ) $ 314 $ (187 ) $ 3,395 $ (3,943 ) $ (548 ) (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. (3) Amounts relating to commodity inventory are recorded in trading account profits.
Cash Flow and Net Investment Hedges	The table below summarizes certain information related to cash flow hedges and net investment hedges for the three and nine months ended September 30, 2017 and 2016 . Of the $739 million after-tax net loss ( $1.2 billion pre-tax) on derivatives in accumulated other comprehensive income (OCI) at September 30, 2017 , $102 million after-tax ( $164 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 Three Months Ended September 30, 2017 Nine Months Ended September 30, 2017 (Dollars in millions, amounts pre-tax) Gains (Losses) Gains (Losses) Hedge (1) Gains (Losses) Gains (Losses) Hedge (1) Cash flow hedges Interest rate risk on variable-rate portfolios $ 11 $ (54 ) $ (1 ) $ 38 $ (274 ) $ 4 Price risk on restricted stock awards (2) 7 32 — 41 103 — Total $ 18 $ (22 ) $ (1 ) $ 79 $ (171 ) $ 4 Net investment hedges Foreign exchange risk (3) $ (427 ) $ (3 ) $ (33 ) $ (1,541 ) $ 1,811 $ (82 ) Three Months Ended September 30, 2016 Nine Months Ended September 30, 2016 Cash flow hedges Interest rate risk on variable-rate portfolios $ (8 ) $ (119 ) $ (4 ) $ 50 $ (447 ) $ 2 Price risk on restricted stock awards (2) 85 (8 ) — (114 ) (61 ) — Total $ 77 $ (127 ) $ (4 ) $ (64 ) $ (508 ) $ 2 Net investment hedges Foreign exchange risk $ 214 $ 2 $ (68 ) $ 173 $ 3 $ (234 ) (1) Amounts related to cash flow hedges represent hedge ineffectiveness and amounts related to net investment hedges represent amounts excluded from effectiveness testing. (2) Gains (losses) recognized in accumulated OCI are primarily related to the change in the Corporation’s stock price for the period. (3) For the nine months ended September 30, 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 during the second quarter of 2017. For additional information, see Note 12 – Accumulated Other Comprehensive Income (Loss)
Other Risk Management Derivatives	The table below presents gains (losses) on these derivatives for the three and nine months ended September 30, 2017 and 2016 . These gains (losses) are largely offset by the income or expense that is recorded on the hedged item. Other Risk Management Derivatives Gains (Losses) Three Months Ended September 30 Nine Months Ended September 30 (Dollars in millions) 2017 2016 2017 2016 Interest rate risk on mortgage banking income (1) $ 1 $ 57 $ 32 $ 882 Credit risk on loans (2) — (7 ) (3 ) (103 ) Interest rate and foreign currency risk on ALM activities (3) 26 (262 ) (26 ) (1,970 ) Price risk on restricted stock awards (4) 33 199 161 (569 ) Other — — 5 40 (1) Net gains on these derivatives are recorded in mortgage banking income as they are used to mitigate the interest rate risk related to mortgage servicing rights (MSRs), interest rate lock commitments (IRLCs) and mortgage loans held-for-sale, all of which are measured at fair value with changes in fair value recorded in mortgage banking income. 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 $76 million and $ 192 million for the three and nine months ended September 30, 2017 compared to $ 185 million and $ 514 million for the same periods in 2016. (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 following table, 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 the three and nine months ended September 30, 2017 and 2016 . 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 17 – 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 Three Months Ended September 30, 2017 Nine Months Ended September 30, 2017 (Dollars in millions) Trading Account Profits Net Interest Income Other (1) Total Trading Account Profits Net Interest Income Other (1) Total Interest rate risk $ 441 $ 224 $ 91 $ 756 $ 1,115 $ 763 $ 325 $ 2,203 Foreign exchange risk 348 2 (40 ) 310 1,063 (2 ) (119 ) 942 Equity risk 640 (142 ) 464 962 2,088 (372 ) 1,426 3,142 Credit risk 251 624 104 979 1,200 1,886 450 3,536 Other risk 34 8 17 59 168 18 67 253 Total sales and trading revenue $ 1,714 $ 716 $ 636 $ 3,066 $ 5,634 $ 2,293 $ 2,149 $ 10,076 Three Months Ended September 30, 2016 Nine Months Ended September 30, 2016 Interest rate risk $ 511 $ 307 $ 83 $ 901 $ 1,430 $ 1,073 $ 210 $ 2,713 Foreign exchange risk 319 (4 ) (39 ) 276 1,003 (7 ) (112 ) 884 Equity risk 463 31 467 961 1,481 15 1,573 3,069 Credit risk 598 634 123 1,355 1,224 1,895 380 3,499 Other risk 43 7 8 58 263 (19 ) 34 278 Total sales and trading revenue $ 1,934 $ 975 $ 642 $ 3,551 $ 5,401 $ 2,957 $ 2,085 $ 10,443 (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 $ 488 million and $ 1.5 billion for the three and nine months ended September 30, 2017 and $ 485 million and $ 1.6 billion for the same periods in 2016.
Disclosure of Credit Derivatives	Credit derivative instruments where the Corporation is the seller of credit protection and their expiration at September 30, 2017 and December 31, 2016 are summarized in the following table. Credit Derivative Instruments September 30, 2017 Carrying Value (Dollars in millions) Less than One Year One to Three Years Three to Five Years Over Five Years Total Credit default swaps: Investment grade $ 10 $ 27 $ 175 $ 389 $ 601 Non-investment grade 237 571 462 2,343 3,613 Total 247 598 637 2,732 4,214 Total return swaps/other: Investment grade 39 — — — 39 Non-investment grade 153 — — — 153 Total 192 — — — 192 Total credit derivatives $ 439 $ 598 $ 637 $ 2,732 $ 4,406 Credit-related notes: Investment grade $ — $ — $ 84 $ 702 $ 786 Non-investment grade 20 12 31 1,416 1,479 Total credit-related notes $ 20 $ 12 $ 115 $ 2,118 $ 2,265 Maximum Payout/Notional Credit default swaps: Investment grade $ 76,594 $ 117,714 $ 109,875 $ 38,025 $ 342,208 Non-investment grade 62,935 43,775 44,094 21,466 172,270 Total 139,529 161,489 153,969 59,491 514,478 Total return swaps/other: Investment grade 36,743 — — — 36,743 Non-investment grade 13,232 4,792 143 404 18,571 Total 49,975 4,792 143 404 55,314 Total credit derivatives $ 189,504 $ 166,281 $ 154,112 $ 59,895 $ 569,792 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/other: 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/other: 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 September 30, 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 September 30, 2017 (Dollars in millions) One incremental notch Second incremental notch Bank of America Corporation $ 512 $ 668 Bank of America, N.A. and subsidiaries (1) 387 300 (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 September 30, 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 September 30, 2017 (Dollars in millions) One incremental notch Second incremental notch Derivative liabilities $ 468 $ 1,122 Collateral posted 387 857
Valuation Adjustments on Derivatives	The table below presents credit valuation adjustment (CVA), DVA and FVA gains (losses) on derivatives, which are recorded in trading account profits, on a gross and net of hedge basis for the three and nine months ended September 30, 2017 and 2016 . For more information on the valuation adjustments on derivatives, see Note 2 – Derivatives to the Consolidated Financial Statements of the Corporation's 2016 Annual Report on Form 10-K. Valuation Adjustments on Derivatives (1) Gains (Losses) Three Months Ended September 30 2017 2016 (Dollars in millions) Gross Net Gross Net Derivative assets (CVA) $ 23 $ 15 $ 280 $ 66 Derivative assets/liabilities (FVA) 37 43 42 51 Derivative liabilities (DVA) 29 17 (125 ) (103 ) Nine Months Ended September 30 2017 2016 Gross Net Gross Net Derivative assets (CVA) $ 281 $ 93 $ 45 $ 151 Derivative assets/liabilities (FVA) 113 140 9 20 Derivative liabilities (DVA) (249 ) (201 ) 106 (60 ) (1) At September 30, 2017 and December 31, 2016 , cumulative CVA reduced the derivative assets balance by $726 million and $1.0 billion , cumulative FVA reduced the net derivatives balance by $182 million and $296 million , and cumulative DVA reduced the derivative liabilities balance by $525 million and $774 million , respectively.
Derivative
Derivative [Line Items]
Offsetting Liabilities	The following table presents derivative instruments included in derivative assets and liabilities on the Consolidated Balance Sheet at September 30, 2017 and December 31, 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 9 – Federal Funds Sold or Purchased, Securities Financing Agreements and Short-term Borrowings . Offsetting of Derivatives (1) September 30, 2017 December 31, 2016 (Dollars in billions) Derivative Assets Derivative Liabilities Derivative Assets Derivative Liabilities Interest rate contracts Over-the-counter $ 219.1 $ 211.3 $ 267.3 $ 258.2 Over-the-counter cleared (2) 2.3 2.3 177.2 182.8 Foreign exchange contracts Over-the-counter 88.2 90.7 124.3 126.7 Over-the-counter cleared 0.7 0.6 0.3 0.3 Equity contracts Over-the-counter 18.3 17.3 15.6 13.7 Exchange-traded 9.5 9.7 11.4 10.8 Commodity contracts Over-the-counter 2.7 4.0 3.7 4.9 Exchange-traded 0.7 0.6 1.1 1.0 Credit derivatives Over-the-counter 10.1 10.5 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 338.4 333.8 426.2 418.2 Exchange-traded 10.2 10.3 12.5 11.8 Over-the-counter cleared (2) 9.1 8.9 181.8 187.4 Less: Legally enforceable master netting agreements and cash collateral received/paid Over-the-counter (314.9 ) (312.8 ) (398.2 ) (392.6 ) Exchange-traded (9.2 ) (9.2 ) (8.9 ) (8.9 ) Over-the-counter cleared (2) (8.2 ) (8.6 ) (181.5 ) (187.3 ) Derivative assets/liabilities, after netting 25.4 22.4 31.9 28.6 Other gross derivative assets/liabilities (3) 13.0 9.4 10.6 10.9 Total derivative assets/liabilities 38.4 31.8 42.5 39.5 Less: Financial instruments collateral (4) (11.3 ) (9.6 ) (13.5 ) (10.5 ) Total net derivative assets/liabilities $ 27.1 $ 22.2 $ 29.0 $ 29.0 (1) Over-the-counter (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 Assets	The following table presents derivative instruments included in derivative assets and liabilities on the Consolidated Balance Sheet at September 30, 2017 and December 31, 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 9 – Federal Funds Sold or Purchased, Securities Financing Agreements and Short-term Borrowings . Offsetting of Derivatives (1) September 30, 2017 December 31, 2016 (Dollars in billions) Derivative Assets Derivative Liabilities Derivative Assets Derivative Liabilities Interest rate contracts Over-the-counter $ 219.1 $ 211.3 $ 267.3 $ 258.2 Over-the-counter cleared (2) 2.3 2.3 177.2 182.8 Foreign exchange contracts Over-the-counter 88.2 90.7 124.3 126.7 Over-the-counter cleared 0.7 0.6 0.3 0.3 Equity contracts Over-the-counter 18.3 17.3 15.6 13.7 Exchange-traded 9.5 9.7 11.4 10.8 Commodity contracts Over-the-counter 2.7 4.0 3.7 4.9 Exchange-traded 0.7 0.6 1.1 1.0 Credit derivatives Over-the-counter 10.1 10.5 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 338.4 333.8 426.2 418.2 Exchange-traded 10.2 10.3 12.5 11.8 Over-the-counter cleared (2) 9.1 8.9 181.8 187.4 Less: Legally enforceable master netting agreements and cash collateral received/paid Over-the-counter (314.9 ) (312.8 ) (398.2 ) (392.6 ) Exchange-traded (9.2 ) (9.2 ) (8.9 ) (8.9 ) Over-the-counter cleared (2) (8.2 ) (8.6 ) (181.5 ) (187.3 ) Derivative assets/liabilities, after netting 25.4 22.4 31.9 28.6 Other gross derivative assets/liabilities (3) 13.0 9.4 10.6 10.9 Total derivative assets/liabilities 38.4 31.8 42.5 39.5 Less: Financial instruments collateral (4) (11.3 ) (9.6 ) (13.5 ) (10.5 ) Total net derivative assets/liabilities $ 27.1 $ 22.2 $ 29.0 $ 29.0 (1) Over-the-counter (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)	9 Months Ended
	Sep. 30, 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 available-for-sale (AFS) debt securities, other debt securities carried at fair value, held-to-maturity (HTM) debt securities and AFS marketable equity securities at September 30, 2017 and December 31, 2016 . Debt Securities and Available-for-Sale Marketable Equity Securities September 30, 2017 (Dollars in millions) Amortized Cost Gross Gains Gross Losses Fair Value Available-for-sale debt securities Mortgage-backed securities: Agency $ 196,530 $ 850 $ (1,186 ) $ 196,194 Agency-collateralized mortgage obligations 7,021 73 (45 ) 7,049 Commercial 12,584 48 (168 ) 12,464 Non-agency residential (1) 2,345 333 (21 ) 2,657 Total mortgage-backed securities 218,480 1,304 (1,420 ) 218,364 U.S. Treasury and agency securities 50,824 70 (626 ) 50,268 Non-U.S. securities 5,432 9 (1 ) 5,440 Other taxable securities, substantially all asset-backed securities 6,964 77 (3 ) 7,038 Total taxable securities 281,700 1,460 (2,050 ) 281,110 Tax-exempt securities 19,117 167 (92 ) 19,192 Total available-for-sale debt securities 300,817 1,627 (2,142 ) 300,302 Other debt securities carried at fair value 16,265 345 (48 ) 16,562 Total debt securities carried at fair value 317,082 1,972 (2,190 ) 316,864 Held-to-maturity debt securities, substantially all U.S. agency mortgage-backed securities 122,345 267 (1,427 ) 121,185 Total debt securities (2) $ 439,427 $ 2,239 $ (3,617 ) $ 438,049 Available-for-sale marketable equity securities (3) $ 22 $ 28 $ — $ 50 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 September 30, 2017 and December 31, 2016 , the underlying collateral type included approximately 70 percent and 60 percent prime, 13 percent and 19 percent Alt-A, and 17 percent and 21 percent subprime. (2) The Corporation had debt securities from Fannie Mae (FNMA) and Freddie Mac (FHLMC) that each exceeded 10 percent of shareholders’ equity, with an amortized cost of $165.1 billion and $48.2 billion , and a fair value of $164.2 billion and $48.1 billion at September 30, 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. During the second quarter of 2017, the Corporation sold its non-U.S. consumer credit card business.
Schedule of Other Debt Securities Carried at Fair Value	The table below presents the components of other debt securities carried at fair value where the changes in fair value are reported in other income. In the three and nine months ended September 30, 2017 , the Corporation recorded unrealized mark-to-market net gains of $124 million and $323 million , and realized net losses of $11 million and $129 million , compared to unrealized mark-to-market net gains of $47 million and net losses of $25 million , and realized net losses of $28 million and $65 million for the same periods in 2016 . These amounts exclude hedge results. Other Debt Securities Carried at Fair Value (Dollars in millions) September 30 December 31 Mortgage-backed securities: Agency-collateralized mortgage obligations $ 5 $ 5 Non-agency residential 3,058 3,139 Total mortgage-backed securities 3,063 3,144 Non-U.S. securities (1) 13,260 16,336 Other taxable securities, substantially all asset-backed securities 239 240 Total $ 16,562 $ 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 the three and nine months ended September 30, 2017 and 2016 are presented in the table below. Gains and Losses on Sales of AFS Debt Securities Three Months Ended September 30 Nine Months Ended September 30 (Dollars in millions) 2017 2016 2017 2016 Gross gains $ 130 $ 57 $ 286 $ 513 Gross losses (5 ) (6 ) (8 ) (23 ) Net gains on sales of AFS debt securities $ 125 $ 51 $ 278 $ 490 Income tax expense attributable to realized net gains on sales of AFS debt securities $ 48 $ 19 $ 106 $ 186
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 September 30, 2017 and December 31, 2016 . Temporarily Impaired and Other-than-temporarily Impaired AFS Debt Securities September 30, 2017 Less than Twelve Months Twelve Months or Longer Total (Dollars in millions) Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Temporarily impaired AFS debt securities Mortgage-backed securities: Agency $ 96,106 $ (681 ) $ 17,570 $ (505 ) $ 113,676 $ (1,186 ) Agency-collateralized mortgage obligations 2,137 (15 ) 1,051 (30 ) 3,188 (45 ) Commercial 5,068 (59 ) 2,819 (109 ) 7,887 (168 ) Non-agency residential 140 (7 ) 118 (8 ) 258 (15 ) Total mortgage-backed securities 103,451 (762 ) 21,558 (652 ) 125,009 (1,414 ) U.S. Treasury and agency securities 20,685 (144 ) 17,035 (482 ) 37,720 (626 ) Non-U.S. securities 774 (1 ) — — 774 (1 ) Other taxable securities, substantially all asset-backed securities — — 384 (3 ) 384 (3 ) Total taxable securities 124,910 (907 ) 38,977 (1,137 ) 163,887 (2,044 ) Tax-exempt securities — — 2,682 (92 ) 2,682 (92 ) Total temporarily impaired AFS debt securities 124,910 (907 ) 41,659 (1,229 ) 166,569 (2,136 ) Other-than-temporarily impaired AFS debt securities (1) Non-agency residential mortgage-backed securities 27 (1 ) 30 (5 ) 57 (6 ) Total temporarily impaired and other-than-temporarily impaired AFS debt securities $ 124,937 $ (908 ) $ 41,689 $ (1,234 ) $ 166,626 $ (2,142 ) 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 other-than-temporary impaired AFS debt securities on which an other-than-temporary impairment (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 RMBS were as follows at September 30, 2017 . Significant Assumptions Range (1) Weighted- 10th Percentile (2) 90th Percentile (2) Prepayment speed 12.0 % 3.0 % 20.6 % Loss severity 19.8 9.1 36.5 Life default rate 21.0 1.2 77.7 (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 September 30, 2017 are summarized in the table below. Actual duration and yields may differ as prepayments on the loans underlying the mortgages or other asset-backed securities (ABS) are passed through to the Corporation. Maturities of Debt Securities Carried at Fair Value and Held-to-maturity Debt Securities September 30, 2017 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 (Dollars in millions) Amount Yield (1) Amount Yield (1) Amount Yield (1) Amount Yield (1) Amount Yield (1) Amortized cost of debt securities carried at fair value Mortgage-backed securities: Agency $ 6 4.67 % $ 25 3.38 % $ 593 2.56 % $ 195,906 3.23 % $ 196,530 3.23 % Agency-collateralized mortgage obligations — — — — 34 2.50 6,991 3.18 7,025 3.18 Commercial 48 8.11 847 2.06 11,183 2.44 506 2.70 12,584 2.45 Non-agency residential — — — — 26 0.01 5,106 9.05 5,132 9.00 Total mortgage-backed securities 54 7.73 872 2.10 11,836 2.44 208,509 3.37 221,271 3.32 U.S. Treasury and agency securities 516 0.39 21,254 1.40 29,033 1.96 21 2.42 50,824 1.71 Non-U.S. securities 16,563 0.50 1,839 1.24 110 1.34 177 6.52 18,689 0.63 Other taxable securities, substantially all asset-backed securities 1,747 2.28 2,865 2.59 1,418 2.95 1,151 3.28 7,181 2.70 Total taxable securities 18,880 0.68 26,830 1.54 42,397 2.13 209,858 3.37 297,965 2.86 Tax-exempt securities 1,175 1.46 6,428 1.77 9,155 1.66 2,359 2.03 19,117 1.73 Total amortized cost of debt securities carried at fair value $ 20,055 0.73 $ 33,258 1.58 $ 51,552 2.04 $ 212,217 3.36 $ 317,082 2.79 Amortized cost of HTM debt securities (2) $ — — $ 35 3.66 $ 1,074 2.56 $ 121,236 3.03 $ 122,345 3.03 Debt securities carried at fair value Mortgage-backed securities: Agency $ 6 $ 25 $ 598 $ 195,565 $ 196,194 Agency-collateralized mortgage obligations — — 33 7,021 7,054 Commercial 48 848 11,072 496 12,464 Non-agency residential — — 35 5,680 5,715 Total mortgage-backed securities 54 873 11,738 208,762 221,427 U.S. Treasury and agency securities 516 20,992 28,739 21 50,268 Non-U.S. securities 16,563 1,844 111 182 18,700 Other taxable securities, substantially all asset-backed securities 1,747 2,845 1,450 1,235 7,277 Total taxable securities 18,880 26,554 42,038 210,200 297,672 Tax-exempt securities 1,174 6,451 9,202 2,365 19,192 Total debt securities carried at fair value $ 20,054 $ 33,005 $ 51,240 $ 212,565 $ 316,864 Fair value of HTM debt securities (2) $ — $ 27 $ 896 $ 120,262 $ 121,185 (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)	9 Months Ended
	Sep. 30, 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 September 30, 2017 and December 31, 2016 . During the second quarter of 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 additional information, see Note 1 – Summary of Significant Accounting Principles . September 30, 2017 (Dollars in millions) 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 Consumer real estate Core portfolio Residential mortgage $ 1,583 $ 306 $ 986 $ 2,875 $ 167,782 $ 170,657 Home equity 246 111 435 792 44,585 45,377 Non-core portfolio Residential mortgage (5) 1,144 540 3,728 5,412 14,978 $ 8,399 28,789 Home equity 269 131 613 1,013 10,449 2,913 14,375 Credit card and other consumer U.S. credit card 492 355 810 1,657 90,945 92,602 Direct/Indirect consumer (6) 273 82 33 388 93,003 93,391 Other consumer (7) 7 1 1 9 2,415 2,424 Total consumer 4,014 1,526 6,606 12,146 424,157 11,312 447,615 Consumer loans accounted for under the fair value option (8) $ 978 978 Total consumer loans and leases 4,014 1,526 6,606 12,146 424,157 11,312 978 448,593 Commercial U.S. commercial 459 176 349 984 281,693 282,677 Commercial real estate (9) 13 2 51 66 59,562 59,628 Commercial lease financing 39 56 45 140 21,273 21,413 Non-U.S. commercial 9 14 — 23 95,873 95,896 U.S. small business commercial 63 38 80 181 13,422 13,603 Total commercial 583 286 525 1,394 471,823 473,217 Commercial loans accounted for under the fair value option (8) 5,307 5,307 Total commercial loans and leases 583 286 525 1,394 471,823 5,307 478,524 Total loans and leases (10) $ 4,597 $ 1,812 $ 7,131 $ 13,540 $ 895,980 $ 11,312 $ 6,285 $ 927,117 Percentage of outstandings 0.50 % 0.19 % 0.77 % 1.46 % 96.64 % 1.22 % 0.68 % 100.00 % (1) Consumer real estate loans 30-59 days past due includes fully-insured loans of $905 million and nonperforming loans of $282 million . Consumer real estate loans 60-89 days past due includes fully-insured loans of $443 million and nonperforming loans of $201 million . (2) Consumer real estate includes fully-insured loans of $3.4 billion . (3) Consumer real estate includes $2.3 billion and direct/indirect consumer includes $39 million of nonperforming loans. (4) Purchased credit-impaired (PCI) loan amounts are shown gross of the valuation allowance. (5) Total outstandings includes pay option loans of $1.5 billion . The Corporation no longer originates this product. (6) Total outstandings includes auto and specialty lending loans of $50.0 billion , unsecured consumer lending loans of $484 million , U.S. securities-based lending loans of $39.3 billion , non-U.S. consumer loans of $2.9 billion and other consumer loans of $682 million . (7) Total outstandings includes consumer leases of $2.3 billion and consumer overdrafts of $160 million . (8) Consumer loans accounted for under the fair value option were residential mortgage loans of $615 million and home equity loans of $363 million . Commercial loans accounted for under the fair value option were U.S. commercial loans of $2.8 billion and non-U.S. commercial loans of $2.5 billion . For additional information, see Note 14 – Fair Value Measurements and Note 15 – Fair Value Option . (9) Total outstandings includes U.S. commercial real estate loans of $55.5 billion and non-U.S. commercial real estate loans of $4.2 billion . (10) The Corporation pledged $152.9 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. December 31, 2016 (Dollars in millions) 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 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 Commercial real estate (9) 20 10 56 86 57,269 57,355 Commercial lease financing 167 21 27 215 22,160 22,375 Non-U.S. commercial 348 4 5 357 89,040 89,397 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 were residential mortgage loans of $710 million and home equity loans of $341 million . Commercial loans accounted for under the fair value option were U.S. commercial loans of $2.9 billion and non-U.S. commercial loans of $3.1 billion . For more information, see Note 14 – Fair Value Measurements and Note 15 – 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 September 30, 2017 and December 31, 2016 . Nonperforming loans held-for-sale (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 to the Consolidated Financial Statements of the Corporation's 2016 Annual Report on Form 10-K. Credit Quality Nonperforming Loans and Leases Accruing Past Due 90 Days or More (Dollars in millions) September 30 December 31 September 30 December 31 Consumer real estate Core portfolio Residential mortgage (1) $ 1,076 $ 1,274 $ 396 $ 486 Home equity 1,046 969 — — Non-core portfolio Residential mortgage (1) 1,442 1,782 2,976 4,307 Home equity 1,645 1,949 — — Credit card and other consumer U.S. credit card n/a n/a 810 782 Non-U.S. credit card n/a n/a — 66 Direct/Indirect consumer 43 28 31 34 Other consumer — 2 1 4 Total consumer 5,252 6,004 4,214 5,679 Commercial U.S. commercial 863 1,256 82 106 Commercial real estate 130 72 — 7 Commercial lease financing 26 36 38 19 Non-U.S. commercial 244 279 — 5 U.S. small business commercial 55 60 68 71 Total commercial 1,318 1,703 188 208 Total loans and leases $ 6,570 $ 7,707 $ 4,402 $ 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 September 30, 2017 and December 31, 2016 , residential mortgage includes $2.3 billion and $3.0 billion of loans on which interest has been curtailed by the Federal Housing Administration (FHA), and therefore are no longer accruing interest, although principal is still insured, and $1.1 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 September 30, 2017 and December 31, 2016 . Consumer Real Estate – Credit Quality Indicators (1) September 30, 2017 (Dollars in millions) Core Residential Mortgage (2) Non-core Residential (2) Residential Mortgage PCI (3) Core Home Equity (2) Non-core Home Equity (2) Home Equity PCI Refreshed LTV (4) Less than or equal to 90 percent $ 146,679 $ 12,603 $ 7,095 $ 43,942 $ 8,128 $ 1,881 Greater than 90 percent but less than or equal to 100 percent 3,288 1,016 624 660 1,211 420 Greater than 100 percent 1,444 1,231 680 775 2,123 612 Fully-insured loans (5) 19,246 5,540 — — — — Total consumer real estate $ 170,657 $ 20,390 $ 8,399 $ 45,377 $ 11,462 $ 2,913 Refreshed FICO score Less than 620 $ 2,285 $ 2,560 $ 2,102 $ 1,192 $ 2,268 $ 470 Greater than or equal to 620 and less than 680 4,652 2,260 1,740 2,416 2,506 495 Greater than or equal to 680 and less than 740 22,153 3,720 2,446 8,484 2,860 862 Greater than or equal to 740 122,321 6,310 2,111 33,285 3,828 1,086 Fully-insured loans (5) 19,246 5,540 — — — — Total consumer real estate $ 170,657 $ 20,390 $ 8,399 $ 45,377 $ 11,462 $ 2,913 (1) Excludes $978 million of loans accounted for under the fair value option. (2) Excludes PCI loans. (3) Includes $1.3 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 September 30, 2017 (Dollars in millions) U.S. Credit Card Direct/Indirect Consumer Other Consumer Refreshed FICO score Less than 620 $ 4,612 $ 1,578 $ 42 Greater than or equal to 620 and less than 680 12,195 2,003 125 Greater than or equal to 680 and less than 740 34,796 12,161 364 Greater than or equal to 740 40,999 34,731 1,730 Other internal credit metrics (1, 2) — 42,918 163 Total credit card and other consumer $ 92,602 $ 93,391 $ 2,424 (1) Other internal credit metrics may include delinquency status, geography or other factors. (2) Direct/indirect consumer includes $42.2 billion of securities-based lending which is overcollateralized and therefore has minimal credit risk. Commercial – Credit Quality Indicators (1) September 30, 2017 (Dollars in millions) U.S. Commercial Commercial Real Estate Commercial Financing Non-U.S. Commercial U.S. Small Commercial (2) Risk ratings Pass rated $ 273,670 $ 59,001 $ 20,763 $ 93,498 $ 354 Reservable criticized 9,007 627 650 2,398 50 Refreshed FICO score (3) Less than 620 224 Greater than or equal to 620 and less than 680 615 Greater than or equal to 680 and less than 740 1,842 Greater than or equal to 740 3,683 Other internal credit metrics (3, 4) 6,835 Total commercial $ 282,677 $ 59,628 $ 21,413 $ 95,896 $ 13,603 (1) Excludes $5.3 billion of loans accounted for under the fair value option. (2) U.S. small business commercial includes $825 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 September 30, 2017 , 99 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) December 31, 2016 (Dollars in millions) Core Residential Mortgage (2) Non-core Residential (2) Residential Mortgage PCI (3) Core Home Equity (2) Non-core Home Equity (2) Home Equity PCI 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 December 31, 2016 (Dollars in millions) U.S. Credit Card Non-U.S. Credit Card Direct/Indirect Consumer Other Consumer (1) 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) December 31, 2016 (Dollars in millions) U.S. Commercial Commercial Real Estate Commercial Financing Non-U.S. Commercial U.S. Small Commercial (2) Risk ratings Pass rated $ 261,214 $ 56,957 $ 21,565 $ 85,689 $ 453 Reservable criticized 9,158 398 810 3,708 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 $ 57,355 $ 22,375 $ 89,397 $ 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 in the three and nine months ended September 30, 2017 were primarily due to an increase in the expected principal and interest cash flows due to lower default estimates. Rollforward of Accretable Yield (Dollars in millions) Three Months Ended September 30, 2017 Nine Months Ended September 30, 2017 Accretable yield, beginning of period $ 3,288 $ 3,805 Accretion (147 ) (465 ) Disposals/transfers (282 ) (521 ) Reclassifications from nonaccretable difference 80 120 Accretable yield, September 30, 2017 $ 2,939 $ 2,939
Consumer real estate
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivables	The table below provides the unpaid principal balance, carrying value and related allowance at September 30, 2017 and December 31, 2016 , and the average carrying value and interest income recognized for the three and nine months ended September 30, 2017 and 2016 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 September 30, 2017 December 31, 2016 (Dollars in millions) Unpaid Balance Carrying Value Related Allowance Unpaid Balance Carrying Value Related Allowance With no recorded allowance Residential mortgage $ 9,212 $ 7,172 $ — $ 11,151 $ 8,695 $ — Home equity 3,644 1,962 — 3,704 1,953 — With an allowance recorded Residential mortgage $ 3,167 $ 3,079 $ 188 $ 4,041 $ 3,936 $ 219 Home equity 990 909 181 910 824 137 Total Residential mortgage $ 12,379 $ 10,251 $ 188 $ 15,192 $ 12,631 $ 219 Home equity 4,634 2,871 181 4,614 2,777 137 Three Months Ended September 30 Nine Months Ended September 30 2017 2016 2017 2016 Average Interest (1) Average Interest (1) Average Interest (1) Average Interest (1) With no recorded allowance Residential mortgage $ 7,498 $ 77 $ 9,673 $ 83 $ 7,964 $ 237 $ 10,523 $ 277 Home equity 2,000 27 1,964 37 2,001 82 1,883 67 With an allowance recorded Residential mortgage $ 3,254 $ 29 $ 4,676 $ 36 $ 3,565 $ 97 $ 5,371 $ 133 Home equity 873 6 822 7 850 18 863 18 Total Residential mortgage $ 10,752 $ 106 $ 14,349 $ 119 $ 11,529 $ 334 $ 15,894 $ 410 Home equity 2,873 33 2,786 44 2,851 100 2,746 85 (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 September 30, 2017 and 2016 carrying value for consumer real estate loans that were modified in a TDR during the three and nine months ended September 30, 2017 and 2016 by type of modification. Consumer Real Estate – Modification Programs TDRs Entered into During the Three Months Ended September 30 Nine Months Ended September 30 (Dollars in millions) 2017 2016 2017 2016 Modifications under government programs Contractual interest rate reduction $ 10 $ 18 $ 56 $ 121 Principal and/or interest forbearance 1 2 4 11 Other modifications (1) 7 3 22 21 Total modifications under government programs 18 23 82 153 Modifications under proprietary programs Contractual interest rate reduction 15 20 178 143 Capitalization of past due amounts 12 4 47 27 Principal and/or interest forbearance 2 2 28 47 Other modifications (1) 1 45 45 72 Total modifications under proprietary programs 30 71 298 289 Trial modifications 329 490 605 853 Loans discharged in Chapter 7 bankruptcy (2) 58 84 163 199 Total modifications $ 435 $ 668 $ 1,148 $ 1,494 (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 September 30, 2017 and 2016 unpaid principal balance, carrying value, and average pre- and post-modification interest rates on consumer real estate loans that were modified in TDRs during the three and nine months ended September 30, 2017 and 2016 , 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 the Three Months Ended September 30, 2017 and 2016 (1) September 30, 2017 Three Months Ended September 30, 2017 (Dollars in millions) Unpaid Principal Balance Carrying Value Pre-Modification Interest Rate Post-Modification Interest Rate (2) Net Charge-offs (3) Residential mortgage $ 294 $ 263 4.42 % 4.33 % $ 2 Home equity 212 172 4.01 3.96 15 Total $ 506 $ 435 4.25 4.17 $ 17 September 30, 2016 Three Months Ended September 30, 2016 Residential mortgage $ 487 $ 445 4.83 % 4.51 % $ 4 Home equity 292 223 4.95 3.41 17 Total $ 779 $ 668 4.87 4.10 $ 21 Consumer Real Estate – TDRs Entered into During the Nine Months Ended September 30, 2017 and 2016 (1) September 30, 2017 Nine Months Ended September 30, 2017 Residential mortgage $ 738 $ 657 4.49 % 4.25 % $ 5 Home equity 630 491 4.16 3.52 32 Total $ 1,368 $ 1,148 4.33 3.90 $ 37 September 30, 2016 Nine Months Ended September 30, 2016 Residential mortgage $ 1,039 $ 942 4.77 % 4.29 % $ 9 Home equity 718 552 4.03 2.87 43 Total $ 1,757 $ 1,494 4.47 3.71 $ 52 (1) During the three and nine months ended September 30, 2017 , there was no forgiveness of principal related to residential mortgage loans in connection with TDRs compared to $1 million and $12 million for the same periods in 2016 . (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 September 30, 2017 and 2016 due to sales and other dispositions. The table below presents the carrying value of consumer real estate loans that entered into payment default during the three and nine months ended September 30, 2017 and 2016 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 Three Months Ended September 30 Nine Months Ended September 30 (Dollars in millions) 2017 2016 2017 2016 Modifications under government programs $ 16 $ 51 $ 62 $ 230 Modifications under proprietary programs 32 40 99 145 Loans discharged in Chapter 7 bankruptcy (1) 16 42 93 124 Trial modifications (2) 54 161 312 648 Total modifications $ 118 $ 294 $ 566 $ 1,147 (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.
Credit card and other consumer
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivables	The table below provides the unpaid principal balance, carrying value and related allowance at September 30, 2017 and December 31, 2016 , and the average carrying value and interest income recognized for the three and nine months ended September 30, 2017 and 2016 on TDRs within the Credit Card and Other Consumer portfolio segment. Impaired Loans – Credit Card and Other Consumer September 30, 2017 December 31, 2016 (Dollars in millions) Unpaid Balance Carrying Value (1) Related Allowance Unpaid Balance Carrying Value (1) Related Allowance With no recorded allowance Direct/Indirect consumer $ 53 $ 25 $ — $ 49 $ 22 $ — With an allowance recorded U.S. credit card $ 452 $ 458 $ 125 $ 479 $ 485 $ 128 Non-U.S. credit card n/a n/a n/a 88 100 61 Direct/Indirect consumer 1 2 — 3 3 — Total U.S. credit card $ 452 $ 458 $ 125 $ 479 $ 485 $ 128 Non-U.S. credit card n/a n/a n/a 88 100 61 Direct/Indirect consumer 54 27 — 52 25 — Three Months Ended September 30 Nine Months Ended September 30 2017 2016 2017 2016 Average Interest (2) Average Interest (2) Average Interest (2) Average Interest (2) With no recorded allowance Direct/Indirect consumer $ 20 $ — $ 21 $ — $ 19 $ — $ 21 $ — With an allowance recorded U.S. credit card $ 457 $ 6 $ 539 $ 7 $ 466 $ 18 $ 571 $ 24 Non-U.S. credit card — — 107 — 62 1 115 2 Direct/Indirect consumer 2 — 7 — 2 — 12 — Total U.S. credit card $ 457 $ 6 $ 539 $ 7 $ 466 $ 18 $ 571 $ 24 Non-U.S. credit card — — 107 — 62 1 115 2 Direct/Indirect consumer 22 — 28 — 21 — 33 — (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 Credit Card and Other Consumer TDR portfolio including the September 30, 2017 and 2016 unpaid principal balance, carrying value, and average pre- and post-modification interest rates of loans that were modified in TDRs during the three and nine months ended September 30, 2017 and 2016 , and net charge-offs recorded during the period in which the modification occurred. Credit Card and Other Consumer – TDRs Entered into During the Three and Nine Months Ended September 30, 2017 and 2016 Three Months Ended September 30 Nine Months Ended September 30 2017 (Dollars in millions) Unpaid Principal Balance Carrying Value (1) Pre-Mod Interest Rate Post-Mod Interest Rate Unpaid Principal Balance Carrying Value (1) Pre-Mod Interest Rate Post-Mod Interest Rate U.S. credit card $ 60 $ 64 17.96 % 5.40 % $ 152 $ 161 17.88 % 5.49 % Direct/Indirect consumer 22 14 4.92 4.53 29 18 4.99 4.37 Total (2) $ 82 $ 78 15.64 5.25 $ 181 $ 179 16.57 5.37 2016 U.S. credit card $ 46 $ 50 17.48 % 5.33 % $ 126 $ 134 17.42 % 5.45 % Non-U.S. credit card 32 36 24.11 0.38 63 73 23.93 0.44 Direct/Indirect consumer 7 4 4.13 4.08 16 9 4.50 4.33 Total (2) $ 85 $ 90 19.55 3.27 $ 205 $ 216 19.05 3.72 (1) Includes accrued interest and fees. (2) Net charge-offs were $14 million and $33 million for the three and nine months ended September 30, 2017 compared to $26 million and $43 million for the same periods in 2016. The table below provides information on the Corporation’s primary modification programs for the Credit Card and Other Consumer TDR portfolio at September 30, 2017 and December 31, 2016 . Credit Card and Other Consumer – TDRs by Program Type Internal Programs External Programs Other (1) Total Percent of Balances Current or Less Than 30 Days Past Due (Dollars in millions) September 30 December 31 September 30 December 31 September 30 December 31 September 30 December 31 September 30 December 31 U.S. credit card $ 201 $ 220 $ 256 $ 264 $ 1 $ 1 $ 458 $ 485 88.30 % 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 1 25 22 27 25 89.05 90.49 Total TDRs by program type $ 202 $ 233 $ 257 $ 272 $ 26 $ 105 $ 485 $ 610 88.34 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
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 September 30, 2017 and December 31, 2016 , and the average carrying value and interest income recognized for the three and nine months ended September 30, 2017 and 2016 . 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 September 30, 2017 December 31, 2016 (Dollars in millions) Unpaid Balance Carrying Value Related Allowance Unpaid Balance Carrying Value Related Allowance With no recorded allowance U.S. commercial $ 683 $ 675 $ — $ 860 $ 827 $ — Commercial real estate 117 106 — 77 71 — Non-U.S. commercial 44 27 — 130 130 — With an allowance recorded U.S. commercial $ 1,466 $ 1,132 $ 123 $ 2,018 $ 1,569 $ 132 Commercial real estate 151 39 13 243 96 10 Commercial lease financing 13 12 2 6 4 — Non-U.S. commercial 497 437 67 545 432 104 U.S. small business commercial (1) 82 70 27 85 73 27 Total U.S. commercial $ 2,149 $ 1,807 $ 123 $ 2,878 $ 2,396 $ 132 Commercial real estate 268 145 13 320 167 10 Commercial lease financing 13 12 2 6 4 — Non-U.S. commercial 541 464 67 675 562 104 U.S. small business commercial (1) 82 70 27 85 73 27 Three Months Ended September 30 Nine Months Ended September 30 2017 2016 2017 2016 Average Interest (2) Average Interest (2) Average Interest (2) Average Interest (2) With no recorded allowance U.S. commercial $ 726 $ 3 $ 940 $ 5 $ 822 $ 9 $ 726 $ 10 Commercial real estate 77 1 59 — 61 1 67 — Non-U.S. commercial 14 — 32 — 55 — 18 — With an allowance recorded U.S. commercial $ 1,166 $ 9 $ 1,624 $ 16 $ 1,305 $ 25 $ 1,570 $ 46 Commercial real estate 72 — 87 1 85 2 95 3 Commercial lease financing 10 — 4 — 6 — 2 — Non-U.S. commercial 463 3 397 5 466 9 372 11 U.S. small business commercial (1) 72 — 81 1 74 — 91 1 Total U.S. commercial $ 1,892 $ 12 $ 2,564 $ 21 $ 2,127 $ 34 $ 2,296 $ 56 Commercial real estate 149 1 146 1 146 3 162 3 Commercial lease financing 10 — 4 — 6 — 2 — Non-U.S. commercial 477 3 429 5 521 9 390 11 U.S. small business commercial (1) 72 — 81 1 74 — 91 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 September 30, 2017 and 2016 unpaid principal balance and carrying value of commercial loans that were modified as TDRs during the three and nine months ended September 30, 2017 and 2016 , 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 the Three and Nine Months Ended September 30, 2017 and 2016 Three Months Ended September 30 Nine Months Ended September 30 2017 (Dollars in millions) Unpaid Principal Balance Carrying Value Unpaid Principal Balance Carrying Value U.S. commercial $ 357 $ 322 $ 763 $ 700 Commercial real estate — — 16 9 Commercial lease financing 12 12 12 12 Non-U.S. commercial 105 105 105 105 U.S. small business commercial (1) 3 3 11 12 Total (2) $ 477 $ 442 $ 907 $ 838 2016 U.S. commercial $ 793 $ 768 $ 1,483 $ 1,447 Commercial real estate 4 4 11 11 Commercial lease financing 2 2 7 4 Non-U.S. commercial 17 17 265 201 U.S. small business commercial (1) 1 1 4 4 Total (2) $ 817 $ 792 $ 1,770 $ 1,667 (1) U.S. small business commercial TDRs are comprised of renegotiated small business card loans. (2) Net charge-offs were $27 million and $89 million for the three and nine months ended September 30, 2017 compared to $14 million and $94 million for the same periods in 2016.

Allowance for Credit Losses (Ta

Allowance for Credit Losses (Tables)	9 Months Ended
	Sep. 30, 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 the three and nine months ended September 30, 2017 and 2016 . Three Months Ended September 30, 2017 (Dollars in millions) Consumer Real Estate (1) Credit Card and Other Consumer Commercial Total Allowance Allowance for loan and lease losses, July 1 $ 2,309 $ 3,386 $ 5,180 $ 10,875 Loans and leases charged off (231 ) (919 ) (212 ) (1,362 ) Recoveries of loans and leases previously charged off 230 189 43 462 Net charge-offs (1 ) (730 ) (169 ) (900 ) Write-offs of PCI loans (2) (73 ) — — (73 ) Provision for loan and lease losses (3) (204 ) 934 99 829 Other (4) 1 (40 ) 1 (38 ) Allowance for loan and lease losses, September 30 2,032 3,550 5,111 10,693 Reserve for unfunded lending commitments, July 1 — — 757 757 Provision for unfunded lending commitments — — 5 5 Reserve for unfunded lending commitments, September 30 — — 762 762 Allowance for credit losses, September 30 $ 2,032 $ 3,550 $ 5,873 $ 11,455 Three Months Ended September 30, 2016 Allowance for loan and lease losses, July 1 $ 3,209 $ 3,334 $ 5,294 $ 11,837 Loans and leases charged off (246 ) (868 ) (163 ) (1,277 ) Recoveries of loans and leases previously charged off 145 191 53 389 Net charge-offs (101 ) (677 ) (110 ) (888 ) Write-offs of PCI loans (2) (83 ) — — (83 ) Provision for loan and lease losses (3) (36 ) 741 129 834 Other (4) — (8 ) — (8 ) Allowance for loan and lease losses, September 30 2,989 3,390 5,313 11,692 Reserve for unfunded lending commitments, July 1 — — 750 750 Provision for unfunded lending commitments — — 16 16 Other (4) — — 1 1 Reserve for unfunded lending commitments, September 30 — — 767 767 Allowance for credit losses, September 30 $ 2,989 $ 3,390 $ 6,080 $ 12,459 Nine Months Ended September 30, 2017 Allowance for loan and lease losses, January 1 $ 2,750 $ 3,229 $ 5,258 $ 11,237 Loans and leases charged off (633 ) (2,819 ) (570 ) (4,022 ) Recoveries of loans and leases previously charged off 520 623 137 1,280 Net charge-offs (5) (113 ) (2,196 ) (433 ) (2,742 ) Write-offs of PCI loans (2) (161 ) — — (161 ) Provision for loan and lease losses (3) (445 ) 2,553 287 2,395 Other (4) 1 (36 ) (1 ) (36 ) Allowance for loan and lease losses, September 30 2,032 3,550 5,111 10,693 Reserve for unfunded lending commitments, January 1 — — 762 762 Provision for unfunded lending commitments — — — — Reserve for unfunded lending commitments, September 30 — — 762 762 Allowance for credit losses, September 30 $ 2,032 $ 3,550 $ 5,873 $ 11,455 Nine Months Ended September 30, 2016 Allowance for loan and lease losses, January 1 $ 3,914 $ 3,471 $ 4,849 $ 12,234 Loans and leases charged off (928 ) (2,664 ) (559 ) (4,151 ) Recoveries of loans and leases previously charged off 464 584 162 1,210 Net charge-offs (464 ) (2,080 ) (397 ) (2,941 ) Write-offs of PCI loans (2) (270 ) — — (270 ) Provision for loan and lease losses (3) (191 ) 2,031 962 2,802 Other (4) — (32 ) (101 ) (133 ) Allowance for loan and lease losses, September 30 2,989 3,390 5,313 11,692 Reserve for unfunded lending commitments, January 1 — — 646 646 Provision for unfunded lending commitments — — 21 21 Other (4) — — 100 100 Reserve for unfunded lending commitments, September 30 — — 767 767 Allowance for credit losses, September 30 $ 2,989 $ 3,390 $ 6,080 $ 12,459 (1) Includes valuation allowance associated with the PCI loan portfolio. (2) Write-offs included $45 million and $80 million associated with the sale of PCI loans during the three and nine months ended September 30, 2017 compared to $11 million and $50 million for the same periods in 2016 . (3) During the three and nine months ended September 30, 2017 , for the PCI loan portfolio, the Corporation recorded provision expense of $12 million and $56 million compared to provision expense of $8 million and a benefit of $81 million for the same periods in 2016 . (4) Primarily represents the net impact of portfolio sales, consolidations and deconsolidations, foreign currency translation adjustments, transfers to held-for-sale and certain other reclassifications. (5) Includes net charge-offs of non-U.S. credit card loans, which were previously included in assets of business held for sale. During the second quarter of 2017, the Corporation sold its non-U.S. consumer credit card business. The table below presents the allowance and the carrying value of outstanding loans and leases by portfolio segment at September 30, 2017 and December 31, 2016 . Allowance and Carrying Value by Portfolio Segment September 30, 2017 (Dollars in millions) Consumer Real Estate Credit Card and Other Consumer Commercial Total Impaired loans and troubled debt restructurings (1) Allowance for loan and lease losses (2) $ 369 $ 125 $ 232 $ 726 Carrying value (3) 13,122 485 2,498 16,105 Allowance as a percentage of carrying value 2.81 % 25.77 % 9.29 % 4.51 % Loans collectively evaluated for impairment Allowance for loan and lease losses $ 1,348 $ 3,425 $ 4,879 $ 9,652 Carrying value (3, 4) 234,764 187,932 470,719 893,415 Allowance as a percentage of carrying value (4) 0.57 % 1.82 % 1.04 % 1.08 % Purchased credit-impaired loans Valuation allowance $ 315 n/a n/a $ 315 Carrying value gross of valuation allowance 11,312 n/a n/a 11,312 Valuation allowance as a percentage of carrying value 2.78 % n/a n/a 2.78 % Total Total allowance for loan and lease losses $ 2,032 $ 3,550 $ 5,111 $ 10,693 Carrying value (3, 4) 259,198 188,417 473,217 920,832 Total allowance as a percentage of carrying value (4) 0.78 % 1.88 % 1.08 % 1.16 % 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 September 30, 2017 and December 31, 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 $6.3 billion and $7.1 billion at September 30, 2017 and December 31, 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 . During the second quarter of 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 Var30

Securitizations and Other Variable Interest Entities (Tables)	9 Months Ended
	Sep. 30, 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 the three and nine months ended September 30, 2017 and 2016 . First-lien Mortgage Securitizations Residential Mortgage - Agency Commercial Mortgage Three Months Ended September 30 Nine Months Ended September 30 Three Months Ended September 30 Nine Months Ended September 30 (Dollars in millions) 2017 2016 2017 2016 2017 2016 2017 2016 Cash proceeds from new securitizations (1) $ 3,833 $ 7,131 $ 11,791 $ 18,580 $ 1,225 $ 1,052 $ 2,931 $ 3,031 Gains on securitizations (2) 40 89 140 322 14 27 67 18 Repurchases from securitization trusts (3) 609 684 2,083 2,058 — — — — (1) The Corporation transfers residential mortgage loans to securitizations sponsored by the GSEs or Government National Mortgage Association (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 and commercial 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 $63 million and $195 million , net of hedges, during the three and nine months ended September 30, 2017 compared to $149 million and $349 million for the same periods in 2016 , 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 September 30, 2017 and December 31, 2016 . Home Equity Loan, Credit Card and Other Asset-backed VIEs Home Equity Loan (1) Credit Card (2, 3) Resecuritization Trusts Municipal Bond Trusts (Dollars in millions) September 30 December 31 September 30 December 31 September 30 December 31 September 30 December 31 Unconsolidated VIEs Maximum loss exposure $ 1,632 $ 2,732 $ — $ — $ 9,107 $ 9,906 $ 1,566 $ 1,635 On-balance sheet assets Senior securities held (4) : Trading account assets $ — $ — $ — $ — $ 1,246 $ 902 $ 9 $ — Debt securities carried at fair value 39 46 — — 1,891 2,338 — — Held-to-maturity securities — — — — 5,866 6,569 — — Subordinate securities held (4) : Trading account assets — — — — 30 27 — — Debt securities carried at fair value — — — — 74 70 — — Total retained positions $ 39 $ 46 $ — $ — $ 9,107 $ 9,906 $ 9 $ — Total assets of VIEs (5) $ 2,598 $ 4,274 $ — $ — $ 21,822 $ 22,155 $ 2,250 $ 2,406 Consolidated VIEs Maximum loss exposure $ 119 $ 149 $ 22,937 $ 25,859 $ 343 $ 420 $ 1,215 $ 1,442 On-balance sheet assets Trading account assets $ — $ — $ — $ — $ 864 $ 1,428 $ 1,214 $ 1,454 Loans and leases 192 244 32,281 35,135 — — — — Allowance for loan and lease losses (13 ) (16 ) (1,002 ) (1,007 ) — — — — All other assets 6 7 276 793 — — 1 — Total assets $ 185 $ 235 $ 31,555 $ 34,921 $ 864 $ 1,428 $ 1,215 $ 1,454 On-balance sheet liabilities Short-term borrowings $ — $ — $ — $ — $ — $ — $ 122 $ 348 Long-term debt 82 108 8,598 9,049 521 1,008 — 12 All other liabilities — — 20 13 — — — — Total liabilities $ 82 $ 108 $ 8,618 $ 9,062 $ 521 $ 1,008 $ 122 $ 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 additional information, see Note 7 – Representations and Warranties Obligations and Corporate Guarantees . (2) At September 30, 2017 and December 31, 2016 , loans and leases in the consolidated credit card trust included $15.3 billion and $17.6 billion of seller’s interest. (3) At September 30, 2017 and December 31, 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 following table summarizes select information related to first-lien mortgage securitization trusts in which the Corporation held a variable interest at September 30, 2017 and December 31, 2016 . First-lien Mortgage VIEs Residential Mortgage Non-agency Agency Prime Subprime Alt-A Commercial Mortgage (Dollars in millions) September 30 December 31 September 30 December 31 September 30 December 31 September 30 December 31 September 30 December 31 Unconsolidated VIEs Maximum loss exposure (1) $ 19,585 $ 22,661 $ 623 $ 757 $ 2,677 $ 2,750 $ 464 $ 560 $ 420 $ 344 On-balance sheet assets Senior securities held (2) : Trading account assets $ 300 $ 1,399 $ 18 $ 20 $ 51 $ 112 $ 35 $ 118 $ 58 $ 51 Debt securities carried at FV 15,827 17,620 359 441 2,226 2,235 318 305 — — Held-to-maturity securities 3,447 3,630 — — — — — — 160 64 Subordinate securities held (2) : Trading account assets — — 1 1 22 23 1 1 11 14 Debt securities carried at FV — — 6 8 2 2 20 23 48 54 Held-to-maturity securities — — — — — — — — — 13 Residual interests held — — — — — — — — 25 25 All other assets (3) 11 12 23 28 — — 90 113 — — Total retained positions $ 19,585 $ 22,661 $ 407 $ 498 $ 2,301 $ 2,372 $ 464 $ 560 $ 302 $ 221 Principal balance outstanding (4) $ 242,353 $ 265,332 $ 11,152 $ 16,280 $ 10,993 $ 19,373 $ 29,550 $ 35,788 $ 24,945 $ 23,826 Consolidated VIEs Maximum loss exposure (1) $ 15,040 $ 18,084 $ 337 $ — $ — $ — $ — $ 25 $ — $ — On-balance sheet assets Trading account assets $ 37 $ 434 $ 330 $ — $ — $ — $ — $ 99 $ — $ — Loans and leases 14,762 17,223 — — — — — — — — All other assets 241 427 7 — — — — — — — Total assets $ 15,040 $ 18,084 $ 337 $ — $ — $ — $ — $ 99 $ — $ — On-balance sheet liabilities Long-term debt $ — $ — $ — $ — $ — $ — $ — $ 74 $ — $ — All other liabilities 2 4 — — — — — — — — Total liabilities $ 2 $ 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 additional information, see Note 7 – Representations and Warranties Obligations and Corporate Guarantees and Note 14 – Fair Value Measurements . (2) As a holder of these securities, the Corporation receives scheduled principal and interest payments. During the three and nine months ended September 30, 2017 , the Corporation recognized $0 and $16 million compared to $1 million and $5 million for the same periods in 2016 of credit-related impairment losses in earnings on those securities classified as AFS debt securities. During the three and nine months ended September 30, 2017 and 2016 , the Corporation recognized no credit-related impairment losses in earnings on those securities classified as HTM. (3) Not included in the table above are all other assets of $147 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 $147 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 September 30, 2017 and December 31, 2016 . (4) 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 September 30, 2017 and December 31, 2016 . Other VIEs September 30, 2017 December 31, 2016 (Dollars in millions) Consolidated Unconsolidated Total Consolidated Unconsolidated Total Maximum loss exposure $ 5,398 $ 19,676 $ 25,074 $ 6,114 $ 17,754 $ 23,868 On-balance sheet assets Trading account assets $ 2,697 $ 303 $ 3,000 $ 2,358 $ 233 $ 2,591 Debt securities carried at fair value — 197 197 — 122 122 Loans and leases 2,787 4,200 6,987 3,399 3,249 6,648 Allowance for loan and lease losses (8 ) (33 ) (41 ) (9 ) (24 ) (33 ) Loans held-for-sale 66 843 909 188 464 652 All other assets 131 13,717 13,848 369 13,156 13,525 Total $ 5,673 $ 19,227 $ 24,900 $ 6,305 $ 17,200 $ 23,505 On-balance sheet liabilities Long-term debt (1) $ 256 $ — $ 256 $ 395 $ — $ 395 All other liabilities 32 3,146 3,178 24 2,959 2,983 Total $ 288 $ 3,146 $ 3,434 $ 419 $ 2,959 $ 3,378 Total assets of VIEs $ 5,673 $ 69,817 $ 75,490 $ 6,305 $ 62,269 $ 68,574 (1) Includes $13 million and $229 million of long-term debt at September 30, 2017 and December 31, 2016 issued by other consolidated VIEs, which has recourse to the general credit of the Corporation.

Representations and Warrantie31

Representations and Warranties Obligations and Corporate Guarantees (Tables)	9 Months Ended
	Sep. 30, 2017
Representations and Warranties Obligations and Corporate Guarantees [Abstract]
Outstanding Claims by Category and Product	The following table presents unresolved repurchase claims at September 30, 2017 and December 31, 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. For more information, see Private-label Securitizations and Whole-loan Sales Experience in the MD&A of the Corporation's 2016 Annual Report on Form 10-K , as well as Note 12 – Commitments and Contingencies to the Consolidated Financial Statements of the Corporation's 2016 Annual Report on Form 10-K . Unresolved Repurchase Claims by Counterparty, Net of Duplicate Claims (Dollars in millions) September 30 December 31 By counterparty Private-label securitization trustees, whole-loan investors, including third-party securitization sponsors and other (1) $ 16,019 $ 16,685 Monolines 1,578 1,583 GSEs 5 9 Total unresolved repurchase claims by counterparty, net of duplicate claims $ 17,602 $ 18,277 (1) Includes $11.3 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 September 30, 2017 and December 31, 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 Three Months Ended September 30 Nine Months Ended September 30 (Dollars in millions) 2017 2016 2017 2016 Reserve for representations and warranties and corporate guarantees, beginning of period $ 2,248 $ 2,723 $ 2,339 $ 11,326 Additions for new sales 1 1 3 3 Payments (1) (297 ) (23 ) (385 ) (8,687 ) Provision 198 99 193 158 Reserve for representations and warranties and corporate guarantees, September 30 $ 2,150 $ 2,800 $ 2,150 $ 2,800 (1) In February 2016, the Corporation made an $8.5 billion settlement payment to BNY Mellon as part of the settlement with BNY Mellon.

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	9 Months Ended
	Sep. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	The table below presents goodwill balances by business segment and All Other at September 30, 2017 and December 31, 2016 . The reporting units utilized for goodwill impairment testing are the operating segments or one level below. For additional information, see Note 8 – Goodwill and Intangible Assets to the Consolidated Financial Statements of the Corporation's 2016 Annual Report on Form 10-K. Goodwill (Dollars in millions) September 30 December 31 Consumer Banking $ 30,123 $ 30,123 Global Wealth & Investment Management 9,680 9,681 Global Banking 23,923 23,923 Global Markets 5,197 5,197 All Other 45 820 Less: Goodwill of business held for sale (1) — (775 ) Total goodwill $ 68,968 $ 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 .
Intangible Assets	The table below presents the gross and net carrying values and accumulated amortization for intangible assets at September 30, 2017 and December 31, 2016 . Intangible Assets (1, 2) September 30, 2017 December 31, 2016 (Dollars in millions) Gross Carrying Value Accumulated Amortization Net Gross Carrying Value Accumulated Amortization Net Purchased credit card and affinity relationships $ 5,919 $ 5,553 $ 366 $ 6,830 $ 6,243 $ 587 Core deposit and other intangibles (3) 3,835 2,120 1,715 3,836 2,046 1,790 Customer relationships 3,886 3,509 377 3,887 3,275 612 Total intangible assets (4) $ 13,640 $ 11,182 $ 2,458 $ 14,553 $ 11,564 $ 2,989 (1) Excludes fully amortized intangible assets. (2) At both September 30, 2017 and December 31, 2016 , none of the intangible assets were impaired. (3) Includes $1.6 billion at both September 30, 2017 and December 31, 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.

Federal Funds Sold or Purchas33

Federal Funds Sold or Purchased, Securities Financing Agreements and Short-term Borrowings (Tables)	9 Months Ended
	Sep. 30, 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 following table 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 15 – Fair Value Option . Three Months Ended September 30 Nine Months Ended September 30 2017 2016 2017 2016 (Dollars in millions) Amount Rate Amount Rate Amount Rate Amount Rate Federal funds sold and securities borrowed or purchased under agreements to resell Average during period $ 223,585 1.17 % $ 214,254 0.50 % $ 222,255 1.00 % $ 215,476 0.50 % Maximum month-end balance during period 224,815 n/a 222,489 n/a 237,064 n/a 225,015 n/a Federal funds purchased and securities loaned or sold under agreements to repurchase Average during period $ 197,794 1.37 % $ 177,883 0.93 % $ 199,433 1.18 % $ 184,500 1.00 % Maximum month-end balance during period 197,604 n/a 192,536 n/a 218,017 n/a 196,631 n/a Short-term borrowings Average during period 32,153 2.54 29,751 2.02 38,329 2.43 30,631 1.85 Maximum month-end balance during period 32,679 n/a 31,935 n/a 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 tables below 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 September 30, 2017 (Dollars in millions) Overnight and Continuous 30 Days or Less After 30 Days Through 90 Days Greater than 90 Days (1) Total Securities sold under agreements to repurchase $ 119,610 $ 89,934 $ 41,358 $ 59,174 $ 310,076 Securities loaned 16,027 404 1,989 6,131 24,551 Other 22,258 — — — 22,258 Total $ 157,895 $ 90,338 $ 43,347 $ 65,305 $ 356,885 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 September 30, 2017 (Dollars in millions) Securities Sold Under Agreements to Repurchase Securities Loaned Other Total U.S. government and agency securities $ 169,501 $ — $ 281 $ 169,782 Corporate securities, trading loans and other 8,933 1,339 443 10,715 Equity securities 30,483 17,892 21,479 69,854 Non-U.S. sovereign debt 95,997 5,320 55 101,372 Mortgage trading loans and ABS 5,162 — — 5,162 Total $ 310,076 $ 24,551 $ 22,258 $ 356,885 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 September 30, 2017 (Dollars in millions) Gross Assets/Liabilities (1) Amounts Offset Net Balance Sheet Amount Financial Instruments (2) Net Assets/Liabilities Securities borrowed or purchased under agreements to resell (3) $ 362,065 $ (144,851 ) $ 217,214 $ (165,776 ) $ 51,438 Securities loaned or sold under agreements to repurchase $ 334,627 $ (144,851 ) $ 189,776 $ (161,131 ) $ 28,645 Other (4) 22,258 — 22,258 (22,258 ) — Total $ 356,885 $ (144,851 ) $ 212,034 $ (183,389 ) $ 28,645 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) Financial instruments 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 $11.1 billion and $10.1 billion reported in loans and leases on the Consolidated Balance Sheet at September 30, 2017 and December 31, 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 September 30, 2017 (Dollars in millions) Gross Assets/Liabilities (1) Amounts Offset Net Balance Sheet Amount Financial Instruments (2) Net Assets/Liabilities Securities borrowed or purchased under agreements to resell (3) $ 362,065 $ (144,851 ) $ 217,214 $ (165,776 ) $ 51,438 Securities loaned or sold under agreements to repurchase $ 334,627 $ (144,851 ) $ 189,776 $ (161,131 ) $ 28,645 Other (4) 22,258 — 22,258 (22,258 ) — Total $ 356,885 $ (144,851 ) $ 212,034 $ (183,389 ) $ 28,645 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) Financial instruments 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 $11.1 billion and $10.1 billion reported in loans and leases on the Consolidated Balance Sheet at September 30, 2017 and December 31, 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.

Commitments and Contingencies (

Commitments and Contingencies (Tables)	9 Months Ended
	Sep. 30, 2017
Commitments and Contingencies Disclosure [Abstract]
Schedule of Credit Extension Commitment Expirations	The table below also includes the notional amount of commitments of $4.9 billion and $7.0 billion at September 30, 2017 and December 31, 2016 that are accounted for under the fair value option. However, the table below excludes cumulative net fair value of $101 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 15 – Fair Value Option . Credit Extension Commitments September 30, 2017 (Dollars in millions) Expire in One Expire After One Expire After Three Expire After Five Total Notional amount of credit extension commitments Loan commitments $ 81,579 $ 133,609 $ 145,154 $ 18,639 $ 378,981 Home equity lines of credit 7,400 5,531 2,212 30,265 45,408 Standby letters of credit and other (1) 21,520 10,814 2,760 1,221 36,315 Letters of credit 1,220 102 95 80 1,497 Legally binding commitments 111,719 150,056 150,221 50,205 462,201 Credit card lines (2) 365,007 — — — 365,007 Total credit extension commitments $ 476,726 $ 150,056 $ 150,221 $ 50,205 $ 827,208 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 $26.5 billion and $8.2 billion at September 30, 2017 , and $25.5 billion and $8.3 billion at December 31, 2016 . Amounts in the table include consumer SBLCs of $375 million and $376 million at September 30, 2017 and December 31, 2016 . (2) Includes business card unused lines of credit.

Shareholders' Equity (Tables)

Shareholders' Equity (Tables)	9 Months Ended
	Sep. 30, 2017
Equity [Abstract]
Schedule of Dividends	Declared Quarterly Cash Dividends on Common Stock (1) Declaration Date Record Date Payment Date Dividend Per Share 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 October 30, 2017 .

Accumulated Other Comprehensi36

Accumulated Other Comprehensive Income (Loss) (Tables)	9 Months Ended
	Sep. 30, 2017
Equity [Abstract]
Schedule of Accumulated OCI	The table below presents the changes in accumulated OCI after-tax for the nine months ended September 30, 2017 and 2016 . (Dollars in millions) Debt Securities Available-for- Equity Securities Debit Valuation Adjustments Derivatives Employee Benefit Plans Foreign Currency (1) Total Balance, December 31, 2015 $ 16 $ 62 $ (611 ) $ (1,077 ) $ (2,956 ) $ (792 ) $ (5,358 ) Net change 3,362 (43 ) 49 277 29 (17 ) 3,657 Balance, September 30, 2016 $ 3,378 $ 19 $ (562 ) $ (800 ) $ (2,927 ) $ (809 ) $ (1,701 ) Balance, December 31, 2016 $ (1,299 ) $ 32 $ (767 ) $ (895 ) $ (3,480 ) $ (879 ) $ (7,288 ) Net change 945 (14 ) (149 ) 156 80 102 1,120 Balance, September 30, 2017 $ (354 ) $ 18 $ (916 ) $ (739 ) $ (3,400 ) $ (777 ) $ (6,168 )
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 the nine months ended September 30, 2017 and 2016 . Changes in OCI Components Before- and After-tax Nine Months Ended September 30 2017 2016 (Dollars in millions) Before-tax Tax effect After-tax Before-tax Tax effect After-tax Debt securities: Net increase in fair value $ 1,757 $ (657 ) $ 1,100 $ 5,896 $ (2,239 ) $ 3,657 Reclassifications into earnings: Gains on sales of debt securities (278 ) 106 (172 ) (490 ) 186 (304 ) Other income 33 (16 ) 17 14 (5 ) 9 Net realized gains reclassified into earnings (245 ) 90 (155 ) (476 ) 181 (295 ) Net change 1,512 (567 ) 945 5,420 (2,058 ) 3,362 Available-for-sale marketable equity securities: Net increase (decrease) in fair value 45 (17 ) 28 (70 ) 27 (43 ) Net realized gains reclassified into earnings (2) (67 ) 25 (42 ) — — — Net change (22 ) 8 (14 ) (70 ) 27 (43 ) Debit valuation adjustments: Net increase (decrease) in fair value (255 ) 96 (159 ) 61 (23 ) 38 Net realized losses reclassified into earnings (2) 30 (20 ) 10 18 (7 ) 11 Net change (225 ) 76 (149 ) 79 (30 ) 49 Derivatives: Net increase (decrease) in fair value 79 (30 ) 49 (64 ) 23 (41 ) Reclassifications into earnings: Net interest income 274 (103 ) 171 447 (167 ) 280 Personnel (103 ) 39 (64 ) 61 (23 ) 38 Net realized losses reclassified into earnings 171 (64 ) 107 508 (190 ) 318 Net change 250 (94 ) 156 444 (167 ) 277 Employee benefit plans: Reclassifications into earnings: Prior service cost 3 (1 ) 2 3 (1 ) 2 Net actuarial losses 125 (47 ) 78 61 (24 ) 37 Net realized losses reclassified into earnings (3) 128 (48 ) 80 64 (25 ) 39 Settlements, curtailments and other — — — — (10 ) (10 ) Net change 128 (48 ) 80 64 (35 ) 29 Foreign currency: Net increase (decrease) in fair value (454 ) 462 8 123 (140 ) (17 ) Net gains reclassified into earnings (1,2) (608 ) 702 94 — — — Net change (1,062 ) 1,164 102 123 (140 ) (17 ) Total other comprehensive income (loss) $ 581 $ 539 $ 1,120 $ 6,060 $ (2,403 ) $ 3,657 (1) The nine months ended September 30, 2017 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 during the second quarter of 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.

Earnings Per Common Share (Tabl

Earnings Per Common Share (Tables)	9 Months Ended
	Sep. 30, 2017
Earnings Per Share [Abstract]
Calculation of earnings per common share and diluted earnings per common share	The calculation of earnings per common share (EPS) and diluted EPS for the three and nine months ended September 30, 2017 and 2016 is presented below. For more information on the calculation of EPS, see Note 1 – Summary of Significant Accounting Principles to the Consolidated Financial Statements of the Corporation's 2016 Annual Report on Form 10-K . Three Months Ended September 30 Nine Months Ended September 30 (Dollars in millions, except per share information; shares in thousands) 2017 2016 2017 2016 Earnings per common share Net income $ 5,587 $ 4,955 $ 15,712 $ 13,210 Preferred stock dividends (465 ) (503 ) (1,328 ) (1,321 ) Net income applicable to common shareholders $ 5,122 $ 4,452 $ 14,384 $ 11,889 Average common shares issued and outstanding 10,197,891 10,250,124 10,103,386 10,312,878 Earnings per common share $ 0.50 $ 0.43 $ 1.42 $ 1.15 Diluted earnings per common share Net income applicable to common shareholders $ 5,122 $ 4,452 $ 14,384 $ 11,889 Add preferred stock dividends due to assumed conversions (1) 36 75 186 225 Net income allocated to common shareholders $ 5,158 $ 4,527 $ 14,570 $ 12,114 Average common shares issued and outstanding 10,197,891 10,250,124 10,103,386 10,312,878 Dilutive potential common shares (2) 527,591 750,349 717,039 733,929 Total diluted average common shares issued and outstanding 10,725,482 11,000,473 10,820,425 11,046,807 Diluted earnings per common share $ 0.48 $ 0.41 $ 1.35 $ 1.10 (1) Represents the Series T dividends under the "if-converted" method prior to conversion. (2) Includes incremental dilutive shares from restricted stock units, restricted stock and warrants.

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 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 September 30, 2017 and December 31, 2016 , including financial instruments which the Corporation accounts for under the fair value option, are summarized in the following tables. September 30, 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 $ — $ 56,780 $ — $ — $ 56,780 Trading account assets: U.S. Treasury and agency securities (2) 32,688 589 — — 33,277 Corporate securities, trading loans and other 535 27,760 1,742 — 30,037 Equity securities 58,886 29,149 244 — 88,279 Non-U.S. sovereign debt 16,623 14,346 552 — 31,521 Mortgage trading loans, MBS and ABS: U.S. government-sponsored agency guaranteed (2) — 18,973 — — 18,973 Mortgage trading loans, ABS and other MBS — 6,980 1,252 — 8,232 Total trading account assets (3) 108,732 97,797 3,790 — 210,319 Derivative assets (4, 5) 6,756 360,066 3,878 (332,316 ) 38,384 AFS debt securities: U.S. Treasury and agency securities 48,591 1,677 — — 50,268 Mortgage-backed securities: Agency — 196,194 — — 196,194 Agency-collateralized mortgage obligations — 7,049 — — 7,049 Non-agency residential — 2,657 — — 2,657 Commercial — 12,464 — — 12,464 Non-U.S. securities 774 4,630 36 — 5,440 Other taxable securities — 6,555 483 — 7,038 Tax-exempt securities — 18,725 467 — 19,192 Total AFS debt securities 49,365 249,951 986 — 300,302 Other debt securities carried at fair value: Mortgage-backed securities: Agency-collateralized mortgage obligations — 5 — — 5 Non-agency residential — 3,036 22 — 3,058 Non-U.S. securities 11,911 1,349 — — 13,260 Other taxable securities — 239 — — 239 Total other debt securities carried at fair value 11,911 4,629 22 — 16,562 Loans and leases — 5,667 618 — 6,285 Mortgage servicing rights (6) — — 2,407 — 2,407 Loans held-for-sale — 2,353 775 — 3,128 Customer and other receivables — 230 — — 230 Other assets 17,991 1,083 267 — 19,341 Total assets $ 194,755 $ 778,556 $ 12,743 $ (332,316 ) $ 653,738 Liabilities Interest-bearing deposits in U.S. offices $ — $ 468 $ — $ — $ 468 Federal funds purchased and securities loaned or sold under agreements to repurchase — 38,852 — — 38,852 Trading account liabilities: U.S. Treasury and agency securities 20,390 366 — — 20,756 Equity securities 31,647 4,018 — — 35,665 Non-U.S. sovereign debt 16,606 4,118 — — 20,724 Corporate securities and other 211 9,053 25 — 9,289 Total trading account liabilities 68,854 17,555 25 — 86,434 Derivative liabilities (4, 5) 6,589 349,863 5,901 (330,572 ) 31,781 Short-term borrowings — 1,904 — — 1,904 Accrued expenses and other liabilities 21,121 1,239 9 — 22,369 Long-term debt — 28,007 1,890 — 29,897 Total liabilities $ 96,564 $ 437,888 $ 7,825 $ (330,572 ) $ 211,705 (1) Amounts represent the impact of legally enforceable master netting agreements and also cash collateral held or placed with the same counterparties. (2) Includes $19.5 billion of GSE obligations. (3) Includes securities with a fair value of $15.3 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 the nine months ended September 30, 2017 , $3.0 billion of derivative assets and $2.4 billion of derivative liabilities were transferred from Level 1 to Level 2 and $543 million of derivative assets and $496 million of derivative liabilities were transferred from Level 2 to Level 1 based on the inputs used to measure fair value. For further disaggregation of derivative assets and liabilities, see Note 2 – Derivatives . (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 $162 million non-core MSR portfolio held in All Other and the $518 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 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 (1) Three Months Ended September 30, 2016 Gross (Dollars in millions) Balance 2016 Total Realized/Unrealized Gains/(Losses) (2) Gains (3) Purchases Sales Issuances Settlements Gross Level 3 Gross Level 3 Balance 2016 Change in Unrealized Gains/(Losses) Related to Financial Instruments Still Held (2) Trading account assets: Corporate securities, trading loans and other $ 2,654 $ 57 $ — $ 226 $ (245 ) $ — $ (134 ) $ 202 $ (198 ) $ 2,562 $ 20 Equity securities 455 11 — 10 (98 ) — — 27 (39 ) 366 5 Non-U.S. sovereign debt 630 20 (7 ) — — — (4 ) — — 639 19 Mortgage trading loans, ABS and other MBS 1,286 102 — 331 (441 ) — (103 ) 15 (24 ) 1,166 62 Total trading account assets 5,025 190 (7 ) 567 (784 ) — (241 ) 244 (261 ) 4,733 106 Net derivative assets (4) (648 ) (131 ) — 114 (346 ) — 118 (53 ) (41 ) (987 ) (198 ) AFS debt securities: Non-agency residential MBS 134 — — 189 — — (102 ) 6 — 227 — Other taxable securities 717 1 (1 ) — — — (30 ) — — 687 — Tax-exempt securities 559 — 2 — — — — 10 — 571 — Total AFS debt securities 1,410 1 1 189 — — (132 ) 16 — 1,485 — Other debt securities carried at fair value – Non-agency residential MBS 28 (2 ) — — — — — — — 26 — Loans and leases (5, 6) 1,459 (9 ) — — — — (54 ) — (41 ) 1,355 (8 ) Mortgage servicing rights (6, 7) 2,269 313 — — — 101 (206 ) — — 2,477 262 Loans held-for-sale (5) 690 13 (4 ) — (56 ) — (25 ) 4 (35 ) 587 10 Other assets 348 11 — 4 — — — — — 363 17 Federal funds purchased and securities loaned or sold under agreements to repurchase (5) (313 ) (17 ) — — — — 10 (19 ) 1 (338 ) (17 ) Trading account liabilities – Corporate securities and other (26 ) 2 — — (2 ) — — — — (26 ) 1 Accrued expenses and other liabilities (5) (9 ) — — — — — — — — (9 ) — Long-term debt (5) (2,156 ) (22 ) (23 ) 15 — (3 ) 363 (206 ) 98 (1,934 ) (24 ) (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 (losses); Net derivative assets - primarily trading account profits (losses) and mortgage banking income (loss); MSRs - primarily mortgage banking income (loss); Long-term debt - trading account profits (losses). 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 gains/losses in OCI related to unrealized gains/losses 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 additional information, see Note 1 – Summary of Significant Accounting Principles to the Consolidated Financial Statements of the Corporation's 2016 Annual Report on Form 10-K. (4) Net derivatives include derivative assets of $4.9 billion and derivative liabilities of $5.9 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. 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 the three and nine months ended September 30, 2017 and 2016 , including net realized and unrealized gains (losses) included in earnings and accumulated OCI. Level 3 – Fair Value Measurements (1) Three Months Ended September 30, 2017 Gross (Dollars in millions) Balance July 1 2017 Total Realized/Unrealized Gains/(Losses) (2) Gains (3) Purchases Sales Issuances Settlements Gross Level 3 Gross Level 3 Balance Change in Unrealized Gains/(Losses) Related to Financial Instruments Still Held (2) Trading account assets: Corporate securities, trading loans and other $ 1,777 $ 77 $ — $ 35 $ (79 ) $ 5 $ (208 ) $ 288 $ (153 ) $ 1,742 $ 35 Equity securities 229 8 — 3 (3 ) — — 17 (10 ) 244 10 Non-U.S. sovereign debt 506 33 18 — — — (5 ) — — 552 33 Mortgage trading loans, ABS and other MBS 1,232 10 (1 ) 150 (157 ) — (46 ) 83 (19 ) 1,252 (2 ) Total trading account assets 3,744 128 17 188 (239 ) 5 (259 ) 388 (182 ) 3,790 76 Net derivative assets (4) (1,803 ) (252 ) — 150 (367 ) — 278 7 (36 ) (2,023 ) (283 ) AFS debt securities: Non-U.S. securities 139 1 4 7 — — (115 ) — — 36 — Other taxable securities 483 — 1 — — — (1 ) — — 483 — Tax-exempt securities 518 — 1 — — — (7 ) — (45 ) 467 — Total AFS debt securities 1,140 1 6 7 — — (123 ) — (45 ) 986 — Other debt securities carried at fair value – Non-agency residential MBS 23 — — — — — (1 ) — — 22 — Loans and leases (5, 6) 667 2 — 2 (24 ) — (29 ) — — 618 2 Mortgage servicing rights (6, 7) 2,501 54 — — (28 ) 69 (189 ) — — 2,407 (20 ) Loans held-for-sale (5) 766 38 10 — (4 ) — (93 ) 58 — 775 27 Other assets 294 70 (43 ) — (52 ) — (2 ) — — 267 28 Federal funds purchased and securities loaned or sold under agreements to repurchase (5) (135 ) — — — — — 135 — — — — Trading account liabilities – Corporate securities and other (22 ) 1 — — (3 ) (1 ) — — — (25 ) — Accrued expenses and other liabilities (5) (9 ) — — — — — — — — (9 ) — Long-term debt (5) (1,646 ) (87 ) (7 ) 63 — (129 ) 115 (244 ) 45 (1,890 ) (87 ) (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 (losses); Net derivative assets - primarily trading account profits (losses) and mortgage banking income (loss); MSRs - primarily mortgage banking income (loss); Long-term debt - trading account profits (losses). 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 gains/losses in OCI related to unrealized gains/losses 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 additional information, see Note 1 – Summary of Significant Accounting Principles to the Consolidated Financial Statements of the Corporation's 2016 Annual Report on Form 10-K. (4) Net derivatives include derivative assets of $3.9 billion and derivative liabilities of $5.9 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 (1) Nine Months Ended September 30, 2017 Gross (Dollars in millions) Balance January 1 2017 Total Realized/Unrealized Gains/(Losses) (2) Gains (3) Purchases Sales Issuances Settlements Gross Level 3 Gross Level 3 Balance Change in Unrealized Gains/(Losses) Related to Financial Instruments Still Held (2) Trading account assets: Corporate securities, trading loans and other $ 2,777 $ 225 $ — $ 353 $ (679 ) $ 5 $ (443 ) $ 506 $ (1,002 ) $ 1,742 $ 72 Equity securities 281 23 — 45 (67 ) — (10 ) 119 (147 ) 244 11 Non-U.S. sovereign debt 510 64 12 26 (59 ) — (73 ) 72 — 552 60 Mortgage trading loans, ABS and other MBS 1,211 195 (2 ) 747 (846 ) — (169 ) 187 (71 ) 1,252 107 Total trading account assets 4,779 507 10 1,171 (1,651 ) 5 (695 ) 884 (1,220 ) 3,790 250 Net derivative assets (4) (1,313 ) (1,098 ) — 558 (843 ) — 722 36 (85 ) (2,023 ) (561 ) AFS debt securities: Non-U.S. securities 229 2 16 49 — — (260 ) — — 36 — Other taxable securities 594 3 6 5 — — (31 ) — (94 ) 483 — Tax-exempt securities 542 — 1 — (56 ) — (10 ) 35 (45 ) 467 — Total AFS debt securities 1,365 5 23 54 (56 ) — (301 ) 35 (139 ) 986 — Other debt securities carried at fair value – Non-agency residential MBS 25 (1 ) — — — — (2 ) — — 22 — Loans and leases (5, 6) 720 20 — 2 (24 ) — (93 ) — (7 ) 618 18 Mortgage servicing rights (6, 7) 2,747 40 — — (22 ) 207 (565 ) — — 2,407 (202 ) Loans held-for-sale (5) 656 109 7 2 (159 ) — (281 ) 473 (32 ) 775 60 Other assets 239 53 (31 ) 2 (52 ) — (8 ) 64 — 267 21 Federal funds purchased and securities loaned or sold under agreements to repurchase (5) (359 ) (5 ) — — — (12 ) 171 (58 ) 263 — (5 ) Trading account liabilities – Corporate securities and other (27 ) 13 — 4 (13 ) (2 ) — — — (25 ) (1 ) Accrued expenses and other liabilities (5) (9 ) — — — — — — — — (9 ) — Long-term debt (5) (1,514 ) (160 ) (18 ) 81 — (279 ) 398 (530 ) 132 (1,890 ) (158 ) (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 (losses); Net derivative assets - primarily trading account profits (losses) and mortgage banking income (loss); MSRs - primarily mortgage banking income (loss); Long-term debt - trading account profits (losses). 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 gains/losses in OCI related to unrealized gains/losses 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 additional information, see Note 1 – Summary of Significant Accounting Principles to the Consolidated Financial Statements of the Corporation's 2016 Annual Report on Form 10-K. (4) Net derivatives include derivative assets of $3.9 billion and derivative liabilities of $5.9 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 (1) Nine Months Ended September 30, 2016 Gross (Dollars in millions) Balance 2016 Total Realized/Unrealized Gains/(Losses) (2) Gains (3) Purchases Sales Issuances Settlements Gross Level 3 Gross Level 3 Balance 2016 Change in Unrealized Gains/(Losses) Related to Financial Instruments Still Held (2) Trading account assets: Corporate securities, trading loans and other $ 2,838 $ 118 $ 2 $ 925 $ (638 ) $ — $ (479 ) $ 432 $ (636 ) $ 2,562 $ 11 Equity securities 407 93 — 53 (135 ) — (72 ) 60 (40 ) 366 (19 ) Non-U.S. sovereign debt 521 112 91 3 (1 ) — (87 ) — — 639 110 Mortgage trading loans, ABS and other MBS 1,868 197 (2 ) 681 (1,264 ) — (270 ) 91 (135 ) 1,166 110 Total trading account assets 5,634 520 91 1,662 (2,038 ) — (908 ) 583 (811 ) 4,733 212 Net derivative assets (4) (441 ) 356 — 313 (965 ) — 7 (177 ) (80 ) (987 ) (108 ) AFS debt securities: Non-agency residential MBS 106 — 3 385 (92 ) — (181 ) 6 — 227 — Other taxable securities 757 3 (7 ) — — — (66 ) — — 687 — Tax-exempt securities 569 — (8 ) 1 — — (1 ) 10 — 571 — Total AFS debt securities 1,432 3 (12 ) 386 (92 ) — (248 ) 16 — 1,485 — Other debt securities carried at fair value – Non-agency residential MBS 30 (4 ) — — — — — — — 26 — Loans and leases (5, 6) 1,620 (13 ) — 69 — 50 (143 ) 6 (234 ) 1,355 (3 ) Mortgage servicing rights (6, 7) 3,087 (295 ) — — — 307 (622 ) — — 2,477 (457 ) Loans held-for-sale (5) 787 97 51 20 (236 ) — (77 ) 43 (98 ) 587 76 Other assets 374 (27 ) — 38 — — (24 ) 2 — 363 (15 ) Federal funds purchased and securities loaned or sold under agreements to repurchase (5) (335 ) 12 — — — (14 ) 17 (19 ) 1 (338 ) (21 ) Trading account liabilities – Corporate securities and other (21 ) 4 — 1 (10 ) — — — — (26 ) 3 Short-term borrowings (5) (30 ) 1 — — — — 29 — — — — Accrued expenses and other liabilities (5) (9 ) — — — — — — — — (9 ) — Long-term debt (5) (1,513 ) (192 ) (41 ) 44 — (326 ) 496 (751 ) 349 (1,934 ) (208 ) (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 (losses); Net derivative assets - primarily trading account profits (losses) and mortgage banking income (loss); MSRs - primarily mortgage banking income (loss); Long-term debt - primarily trading account profits (losses). 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 gains/losses in OCI related to unrealized gains/losses 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 additional information, see Note 1 – Summary of Significant Accounting Principles to the Consolidated Financial Statements of the Corporation's 2016 Annual Report on Form 10-K. (4) Net derivatives include derivative assets of $4.9 billion and derivative liabilities of $5.9 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 (1) Nine Months Ended September 30, 2016 Gross (Dollars in millions) Balance 2016 Total Realized/Unrealized Gains/(Losses) (2) Gains (3) Purchases Sales Issuances Settlements Gross Level 3 Gross Level 3 Balance 2016 Change in Unrealized Gains/(Losses) Related to Financial Instruments Still Held (2) Trading account assets: Corporate securities, trading loans and other $ 2,838 $ 118 $ 2 $ 925 $ (638 ) $ — $ (479 ) $ 432 $ (636 ) $ 2,562 $ 11 Equity securities 407 93 — 53 (135 ) — (72 ) 60 (40 ) 366 (19 ) Non-U.S. sovereign debt 521 112 91 3 (1 ) — (87 ) — — 639 110 Mortgage trading loans, ABS and other MBS 1,868 197 (2 ) 681 (1,264 ) — (270 ) 91 (135 ) 1,166 110 Total trading account assets 5,634 520 91 1,662 (2,038 ) — (908 ) 583 (811 ) 4,733 212 Net derivative assets (4) (441 ) 356 — 313 (965 ) — 7 (177 ) (80 ) (987 ) (108 ) AFS debt securities: Non-agency residential MBS 106 — 3 385 (92 ) — (181 ) 6 — 227 — Other taxable securities 757 3 (7 ) — — — (66 ) — — 687 — Tax-exempt securities 569 — (8 ) 1 — — (1 ) 10 — 571 — Total AFS debt securities 1,432 3 (12 ) 386 (92 ) — (248 ) 16 — 1,485 — Other debt securities carried at fair value – Non-agency residential MBS 30 (4 ) — — — — — — — 26 — Loans and leases (5, 6) 1,620 (13 ) — 69 — 50 (143 ) 6 (234 ) 1,355 (3 ) Mortgage servicing rights (6, 7) 3,087 (295 ) — — — 307 (622 ) — — 2,477 (457 ) Loans held-for-sale (5) 787 97 51 20 (236 ) — (77 ) 43 (98 ) 587 76 Other assets 374 (27 ) — 38 — — (24 ) 2 — 363 (15 ) Federal funds purchased and securities loaned or sold under agreements to repurchase (5) (335 ) 12 — — — (14 ) 17 (19 ) 1 (338 ) (21 ) Trading account liabilities – Corporate securities and other (21 ) 4 — 1 (10 ) — — — — (26 ) 3 Short-term borrowings (5) (30 ) 1 — — — — 29 — — — — Accrued expenses and other liabilities (5) (9 ) — — — — — — — — (9 ) — Long-term debt (5) (1,513 ) (192 ) (41 ) 44 — (326 ) 496 (751 ) 349 (1,934 ) (208 ) (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 (losses); Net derivative assets - primarily trading account profits (losses) and mortgage banking income (loss); MSRs - primarily mortgage banking income (loss); Long-term debt - primarily trading account profits (losses). 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 gains/losses in OCI related to unrealized gains/losses 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 additional information, see Note 1 – Summary of Significant Accounting Principles to the Consolidated Financial Statements of the Corporation's 2016 Annual Report on Form 10-K. (4) Net derivatives include derivative assets of $4.9 billion and derivative liabilities of $5.9 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 (1) Three Months Ended September 30, 2016 Gross (Dollars in millions) Balance 2016 Total Realized/Unrealized Gains/(Losses) (2) Gains (3) Purchases Sales Issuances Settlements Gross Level 3 Gross Level 3 Balance 2016 Change in Unrealized Gains/(Losses) Related to Financial Instruments Still Held (2) Trading account assets: Corporate securities, trading loans and other $ 2,654 $ 57 $ — $ 226 $ (245 ) $ — $ (134 ) $ 202 $ (198 ) $ 2,562 $ 20 Equity securities 455 11 — 10 (98 ) — — 27 (39 ) 366 5 Non-U.S. sovereign debt 630 20 (7 ) — — — (4 ) — — 639 19 Mortgage trading loans, ABS and other MBS 1,286 102 — 331 (441 ) — (103 ) 15 (24 ) 1,166 62 Total trading account assets 5,025 190 (7 ) 567 (784 ) — (241 ) 244 (261 ) 4,733 106 Net derivative assets (4) (648 ) (131 ) — 114 (346 ) — 118 (53 ) (41 ) (987 ) (198 ) AFS debt securities: Non-agency residential MBS 134 — — 189 — — (102 ) 6 — 227 — Other taxable securities 717 1 (1 ) — — — (30 ) — — 687 — Tax-exempt securities 559 — 2 — — — — 10 — 571 — Total AFS debt securities 1,410 1 1 189 — — (132 ) 16 — 1,485 — Other debt securities carried at fair value – Non-agency residential MBS 28 (2 ) — — — — — — — 26 — Loans and leases (5, 6) 1,459 (9 ) — — — — (54 ) — (41 ) 1,355 (8 ) Mortgage servicing rights (6, 7) 2,269 313 — — — 101 (206 ) — — 2,477 262 Loans held-for-sale (5) 690 13 (4 ) — (56 ) — (25 ) 4 (35 ) 587 10 Other assets 348 11 — 4 — — — — — 363 17 Federal funds purchased and securities loaned or sold under agreements to repurchase (5) (313 ) (17 ) — — — — 10 (19 ) 1 (338 ) (17 ) Trading account liabilities – Corporate securities and other (26 ) 2 — — (2 ) — — — — (26 ) 1 Accrued expenses and other liabilities (5) (9 ) — — — — — — — — (9 ) — Long-term debt (5) (2,156 ) (22 ) (23 ) 15 — (3 ) 363 (206 ) 98 (1,934 ) (24 ) (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 (losses); Net derivative assets - primarily trading account profits (losses) and mortgage banking income (loss); MSRs - primarily mortgage banking income (loss); Long-term debt - trading account profits (losses). 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 gains/losses in OCI related to unrealized gains/losses 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 additional information, see Note 1 – Summary of Significant Accounting Principles to the Consolidated Financial Statements of the Corporation's 2016 Annual Report on Form 10-K. (4) Net derivatives include derivative assets of $4.9 billion and derivative liabilities of $5.9 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. 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 the three and nine months ended September 30, 2017 and 2016 , including net realized and unrealized gains (losses) included in earnings and accumulated OCI. Level 3 – Fair Value Measurements (1) Three Months Ended September 30, 2017 Gross (Dollars in millions) Balance July 1 2017 Total Realized/Unrealized Gains/(Losses) (2) Gains (3) Purchases Sales Issuances Settlements Gross Level 3 Gross Level 3 Balance Change in Unrealized Gains/(Losses) Related to Financial Instruments Still Held (2) Trading account assets: Corporate securities, trading loans and other $ 1,777 $ 77 $ — $ 35 $ (79 ) $ 5 $ (208 ) $ 288 $ (153 ) $ 1,742 $ 35 Equity securities 229 8 — 3 (3 ) — — 17 (10 ) 244 10 Non-U.S. sovereign debt 506 33 18 — — — (5 ) — — 552 33 Mortgage trading loans, ABS and other MBS 1,232 10 (1 ) 150 (157 ) — (46 ) 83 (19 ) 1,252 (2 ) Total trading account assets 3,744 128 17 188 (239 ) 5 (259 ) 388 (182 ) 3,790 76 Net derivative assets (4) (1,803 ) (252 ) — 150 (367 ) — 278 7 (36 ) (2,023 ) (283 ) AFS debt securities: Non-U.S. securities 139 1 4 7 — — (115 ) — — 36 — Other taxable securities 483 — 1 — — — (1 ) — — 483 — Tax-exempt securities 518 — 1 — — — (7 ) — (45 ) 467 — Total AFS debt securities 1,140 1 6 7 — — (123 ) — (45 ) 986 — Other debt securities carried at fair value – Non-agency residential MBS 23 — — — — — (1 ) — — 22 — Loans and leases (5, 6) 667 2 — 2 (24 ) — (29 ) — — 618 2 Mortgage servicing rights (6, 7) 2,501 54 — — (28 ) 69 (189 ) — — 2,407 (20 ) Loans held-for-sale (5) 766 38 10 — (4 ) — (93 ) 58 — 775 27 Other assets 294 70 (43 ) — (52 ) — (2 ) — — 267 28 Federal funds purchased and securities loaned or sold under agreements to repurchase (5) (135 ) — — — — — 135 — — — — Trading account liabilities – Corporate securities and other (22 ) 1 — — (3 ) (1 ) — — — (25 ) — Accrued expenses and other liabilities (5) (9 ) — — — — — — — — (9 ) — Long-term debt (5) (1,646 ) (87 ) (7 ) 63 — (129 ) 115 (244 ) 45 (1,890 ) (87 ) (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 (losses); Net derivative assets - primarily trading account profits (losses) and mortgage banking income (loss); MSRs - primarily mortgage banking income (loss); Long-term debt - trading account profits (losses). 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 gains/losses in OCI related to unrealized gains/losses 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 additional information, see Note 1 – Summary of Significant Accounting Principles to the Consolidated Financial Statements of the Corporation's 2016 Annual Report on Form 10-K. (4) Net derivatives include derivative assets of $3.9 billion and derivative liabilities of $5.9 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 (1) Nine Months Ended September 30, 2017 Gross (Dollars in millions) Balance January 1 2017 Total Realized/Unrealized Gains/(Losses) (2) Gains (3) Purchases Sales Issuances Settlements Gross Level 3 Gross Level 3 Balance Change in Unrealized Gains/(Losses) Related to Financial Instruments Still Held (2) Trading account assets: Corporate securities, trading loans and other $ 2,777 $ 225 $ — $ 353 $ (679 ) $ 5 $ (443 ) $ 506 $ (1,002 ) $ 1,742 $ 72 Equity securities 281 23 — 45 (67 ) — (10 ) 119 (147 ) 244 11 Non-U.S. sovereign debt 510 64 12 26 (59 ) — (73 ) 72 — 552 60 Mortgage trading loans, ABS and other MBS 1,211 195 (2 ) 747 (846 ) — (169 ) 187 (71 ) 1,252 107 Total trading account assets 4,779 507 10 1,171 (1,651 ) 5 (695 ) 884 (1,220 ) 3,790 250 Net derivative assets (4) (1,313 ) (1,098 ) — 558 (843 ) — 722 36 (85 ) (2,023 ) (561 ) AFS debt securities: Non-U.S. securities 229 2 16 49 — — (260 ) — — 36 — Other taxable securities 594 3 6 5 — — (31 ) — (94 ) 483 — Tax-exempt securities 542 — 1 — (56 ) — (10 ) 35 (45 ) 467 — Total AFS debt securities 1,365 5 23 54 (56 ) — (301 ) 35 (139 ) 986 — Other debt securities carried at fair value – Non-agency residential MBS 25 (1 ) — — — — (2 ) — — 22 — Loans and leases (5, 6) 720 20 — 2 (24 ) — (93 ) — (7 ) 618 18 Mortgage servicing rights (6, 7) 2,747 40 — — (22 ) 207 (565 ) — — 2,407 (202 ) Loans held-for-sale (5) 656 109 7 2 (159 ) — (281 ) 473 (32 ) 775 60 Other assets 239 53 (31 ) 2 (52 ) — (8 ) 64 — 267 21 Federal funds purchased and securities loaned or sold under agreements to repurchase (5) (359 ) (5 ) — — — (12 ) 171 (58 ) 263 — (5 ) Trading account liabilities – Corporate securities and other (27 ) 13 — 4 (13 ) (2 ) — — — (25 ) (1 ) Accrued expenses and other liabilities (5) (9 ) — — — — — — — — (9 ) — Long-term debt (5) (1,514 ) (160 ) (18 ) 81 — (279 ) 398 (530 ) 132 (1,890 ) (158 ) (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 (losses); Net derivative assets - primarily trading account profits (losses) and mortgage banking income (loss); MSRs - primarily mortgage banking income (loss); Long-term debt - trading account profits (losses). 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 gains/losses in OCI related to unrealized gains/losses 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 additional information, see Note 1 – Summary of Significant Accounting Principles to the Consolidated Financial Statements of the Corporation's 2016 Annual Report on Form 10-K. (4) Net derivatives include derivative assets of $3.9 billion and derivative liabilities of $5.9 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 September 30, 2017 and December 31, 2016 . Quantitative Information about Level 3 Fair Value Measurements at September 30, 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 $ 914 Discounted cash flow Yield 0% to 25% 6 % Trading account assets – Mortgage trading loans, ABS and other MBS 293 Prepayment speed 0% to 22% CPR 12 % Loans and leases 617 Default rate 0% to 3% CDR 2 % Loans held-for-sale 4 Loss severity 0% to 54% 18 % Instruments backed by commercial real estate assets $ 264 Discounted cash flow Yield 0% to 25% 6 % Trading account assets – Corporate securities, trading loans and other 218 Price $0 to $100 $68 Trading account assets – Mortgage trading loans, ABS and other MBS 46 Commercial loans, debt securities and other $ 3,754 Discounted cash flow, Market comparables Yield 0% to 12% 4 % Trading account assets – Corporate securities, trading loans and other 1,498 Prepayment speed 10% to 20% 15 % Trading account assets – Non-U.S. sovereign debt 552 Default rate 3% to 4% 4 % Trading account assets – Mortgage trading loans, ABS and other MBS 913 Loss severity 35% to 40% 37 % AFS debt securities – Other taxable securities 19 Price $0 to $185 $63 Loans and leases 1 Loans held-for-sale 771 Auction rate securities $ 957 Discounted cash flow, Market comparables Price $10 to $100 $94 Trading account assets – Corporate securities, trading loans and other 26 AFS debt securities – Other taxable securities 464 AFS debt securities – Tax-exempt securities 467 MSRs $ 2,407 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 $ (1,890 ) Discounted cash flow, Market comparables, Industry standard derivative pricing (2) Equity correlation 3% to 100% 64 % Long-dated equity volatilities 4% to 76% 22 % Yield 7.5 % n/a Price $0 to $100 $65 Net derivative assets Credit derivatives $ (325 ) Discounted cash flow, Stochastic recovery correlation model Yield 1% to 5% 3 % Upfront points 0 points to 100 points 73 points Credit correlation 12% to 90% 58 % Prepayment speed 15% to 20% CPR 16 % Default rate 1% to 4% CDR 2 % Loss severity 35 % n/a Price $0 to $102 $76 Equity derivatives $ (2,235 ) Industry standard derivative pricing (2) Equity correlation 3% to 100% 64 % Long-dated equity volatilities 4% to 76% 22 % Commodity derivatives $ 2 Discounted cash flow, Industry standard derivative pricing (2) Natural gas forward price $2/MMBtu to $6/MMBtu $3/MMBtu Correlation 68% to 90% 85 % Volatilities 25% to 90% 49 % Interest rate derivatives $ 535 Industry standard derivative pricing (3) Correlation (IR/IR) 15% to 90% 53 % Correlation (FX/IR) 0% to 46% 1 % Long-dated inflation rates -10% to 38% 6 % Long-dated inflation volatilities 0% to 1% 1 % Total net derivative assets $ (2,023 ) (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 114 : Trading account assets – Corporate securities, trading loans and other of $1.7 billion , Trading account assets – Non-U.S. sovereign debt of $552 million , Trading account assets – Mortgage trading loans, ABS and other MBS of $1.3 billion , AFS debt securities – Other taxable securities of $483 million , AFS debt securities – Tax-exempt securities of $467 million , Loans and leases of $618 million and LHFS of $775 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 115 : 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 September 30, 2017 and December 31, 2016 . Quantitative Information about Level 3 Fair Value Measurements at September 30, 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 $ 914 Discounted cash flow Yield 0% to 25% 6 % Trading account assets – Mortgage trading loans, ABS and other MBS 293 Prepayment speed 0% to 22% CPR 12 % Loans and leases 617 Default rate 0% to 3% CDR 2 % Loans held-for-sale 4 Loss severity 0% to 54% 18 % Instruments backed by commercial real estate assets $ 264 Discounted cash flow Yield 0% to 25% 6 % Trading account assets – Corporate securities, trading loans and other 218 Price $0 to $100 $68 Trading account assets – Mortgage trading loans, ABS and other MBS 46 Commercial loans, debt securities and other $ 3,754 Discounted cash flow, Market comparables Yield 0% to 12% 4 % Trading account assets – Corporate securities, trading loans and other 1,498 Prepayment speed 10% to 20% 15 % Trading account assets – Non-U.S. sovereign debt 552 Default rate 3% to 4% 4 % Trading account assets – Mortgage trading loans, ABS and other MBS 913 Loss severity 35% to 40% 37 % AFS debt securities – Other taxable securities 19 Price $0 to $185 $63 Loans and leases 1 Loans held-for-sale 771 Auction rate securities $ 957 Discounted cash flow, Market comparables Price $10 to $100 $94 Trading account assets – Corporate securities, trading loans and other 26 AFS debt securities – Other taxable securities 464 AFS debt securities – Tax-exempt securities 467 MSRs $ 2,407 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 $ (1,890 ) Discounted cash flow, Market comparables, Industry standard derivative pricing (2) Equity correlation 3% to 100% 64 % Long-dated equity volatilities 4% to 76% 22 % Yield 7.5 % n/a Price $0 to $100 $65 Net derivative assets Credit derivatives $ (325 ) Discounted cash flow, Stochastic recovery correlation model Yield 1% to 5% 3 % Upfront points 0 points to 100 points 73 points Credit correlation 12% to 90% 58 % Prepayment speed 15% to 20% CPR 16 % Default rate 1% to 4% CDR 2 % Loss severity 35 % n/a Price $0 to $102 $76 Equity derivatives $ (2,235 ) Industry standard derivative pricing (2) Equity correlation 3% to 100% 64 % Long-dated equity volatilities 4% to 76% 22 % Commodity derivatives $ 2 Discounted cash flow, Industry standard derivative pricing (2) Natural gas forward price $2/MMBtu to $6/MMBtu $3/MMBtu Correlation 68% to 90% 85 % Volatilities 25% to 90% 49 % Interest rate derivatives $ 535 Industry standard derivative pricing (3) Correlation (IR/IR) 15% to 90% 53 % Correlation (FX/IR) 0% to 46% 1 % Long-dated inflation rates -10% to 38% 6 % Long-dated inflation volatilities 0% to 1% 1 % Total net derivative assets $ (2,023 ) (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 114 : Trading account assets – Corporate securities, trading loans and other of $1.7 billion , Trading account assets – Non-U.S. sovereign debt of $552 million , Trading account assets – Mortgage trading loans, ABS and other MBS of $1.3 billion , AFS debt securities – Other taxable securities of $483 million , AFS debt securities – Tax-exempt securities of $467 million , Loans and leases of $618 million and LHFS of $775 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 115 : 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 the three and nine months ended September 30, 2017 and 2016 . Assets Measured at Fair Value on a Nonrecurring Basis September 30, 2017 Three Months Ended September 30, 2017 Nine Months Ended September 30, 2017 (Dollars in millions) Level 2 Level 3 Gains (Losses) Assets Loans held-for-sale $ 70 $ 16 $ — $ (4 ) Loans and leases (1) — 813 (152 ) (307 ) Foreclosed properties (2, 3) — 79 (21 ) (35 ) Other assets 353 — (1 ) (121 ) September 30, 2016 Three Months Ended September 30, 2016 Nine Months Ended September 30, 2016 Assets Loans held-for-sale $ 191 $ 48 $ (1 ) $ (44 ) Loans and leases (1) — 1,333 (143 ) (399 ) Foreclosed properties (2, 3) — 113 (23 ) (41 ) Other assets 173 — (18 ) (44 ) (1) Includes $71 million and $132 million of losses on loans that were written down to a collateral value of zero during the three and nine months ended September 30, 2017 , compared to losses of $48 million and $112 million for the same periods in 2016 . (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 taken during the first 90 days after transfer of a loan to foreclosed properties. (3) Excludes $879 million and $1.3 billion of properties acquired upon foreclosure of certain government-guaranteed loans (principally FHA-insured loans) at September 30, 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 September 30, 2017 and December 31, 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 September 30, 2017 (Dollars in millions) Inputs Financial Instrument Fair Value Valuation Technique Significant Unobservable Inputs Ranges of Inputs Weighted Average Loans and leases backed by residential real estate assets $ 813 Market comparables OREO discount 8% to 54% 21 % Costs to sell 7% to 45% 9 % 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)	9 Months Ended
	Sep. 30, 2017
Fair Value Option [Abstract]
Schedule of Fair Value Option Elections	The following tables provide information about the fair value carrying amount and the contractual principal outstanding of assets and liabilities accounted for under the fair value option at September 30, 2017 and December 31, 2016 , and 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 the three and nine months ended September 30, 2017 and 2016 . Fair Value Option Elections September 30, 2017 December 31, 2016 (Dollars in millions) 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 Federal funds sold and securities borrowed or purchased under agreements to resell $ 56,780 $ 56,720 $ 60 $ 49,750 $ 49,615 $ 135 Loans reported as trading account assets (1) 5,734 10,749 (5,015 ) 6,215 11,557 (5,342 ) Trading inventory – other 11,096 n/a n/a 8,206 n/a n/a Consumer and commercial loans 6,285 6,332 (47 ) 7,085 7,190 (105 ) Loans held-for-sale 3,128 4,751 (1,623 ) 4,026 5,595 (1,569 ) Customer receivables and other assets 233 230 3 253 250 3 Long-term deposits 468 433 35 731 672 59 Federal funds purchased and securities loaned or sold under agreements to repurchase 38,852 38,861 (9 ) 35,766 35,929 (163 ) Short-term borrowings 1,904 1,904 — 2,024 2,024 — Unfunded loan commitments 101 n/a n/a 173 n/a n/a Long-term debt (2) 29,897 30,497 (600 ) 30,037 29,862 175 (1) A significant portion of the loans reported as trading account assets are distressed loans which 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 $29.5 billion and $29.7 billion , and contractual principal outstanding of $30.1 billion and $29.5 billion at September 30, 2017 and December 31, 2016 . n/a = not applicable Gains (Losses) Relating to Assets and Liabilities Accounted for Under the Fair Value Option Three Months Ended September 30, 2017 (Dollars in millions) Trading Account Profits Mortgage Banking Income (Loss) Other Income Total Loans reported as trading account assets $ 75 $ — $ — $ 75 Trading inventory – other (1) 1,217 — — 1,217 Loans held-for-sale (2) — 73 19 92 Unfunded loan commitments — — 21 21 Long-term debt (3, 4) (416 ) — (38 ) (454 ) Other (5) 3 — (3 ) — Total $ 879 $ 73 $ (1 ) $ 951 Three Months Ended September 30, 2016 Loans reported as trading account assets $ 125 $ — $ — $ 125 Trading inventory – other (1) 907 — — 907 Loans held-for-sale (2) 5 132 2 139 Unfunded loan commitments — — 133 133 Long-term debt (3, 4) (138 ) — (24 ) (162 ) Other (5) (32 ) — 40 8 Total $ 867 $ 132 $ 151 $ 1,150 Nine Months Ended September 30, 2017 Loans reported as trading account assets $ 272 $ — $ — $ 272 Trading inventory – other (1) 2,890 — — 2,890 Loans held-for-sale (2) — 182 93 275 Unfunded loan commitments — — 55 55 Long-term debt (3, 4) (471 ) — (109 ) (580 ) Other (5) (41 ) — 44 3 Total $ 2,650 $ 182 $ 83 $ 2,915 Nine Months Ended September 30, 2016 Loans reported as trading account assets $ 251 $ — $ — $ 251 Trading inventory – other (1) 551 — — 551 Loans held-for-sale (2) 10 493 57 560 Unfunded loan commitments — — 444 444 Long-term debt (3, 4) (718 ) — (77 ) (795 ) Other (5) (7 ) — (14 ) (21 ) Total $ 87 $ 493 $ 410 $ 990 (1) The gains (losses) in trading account profits are primarily offset by gains (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 12 – Accumulated Other Comprehensive Income (Loss) . For information on how the Corporation’s own credit spread is determined, see Note 20 – Fair Value Measurements to the Consolidated Financial Statements of the Corporation's 2016 Annual Report on Form 10-K. (5) Includes gains (losses) on federal funds sold and securities borrowed or purchased under agreements to resell, consumer and commercial loans, other assets, short-term borrowings, long-term deposits, and federal funds purchased and securities loaned or sold under agreements to repurchase. Gains (Losses) Related to Borrower-specific Credit Risk for Assets Accounted for Under the Fair Value Option Three Months Ended September 30 Nine Months Ended September 30 (Dollars in millions) 2017 2016 2017 2016 Loans reported as trading account assets $ 5 $ — $ 25 $ 5 Consumer and commercial loans (10 ) 14 31 (25 ) Loans held-for-sale (2 ) (10 ) (3 ) (6 )

Fair Value of Financial Instr40

Fair Value of Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 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 September 30, 2017 and December 31, 2016 are presented in the following table. Fair Value of Financial Instruments September 30, 2017 Fair Value (Dollars in millions) Carrying Value Level 2 Level 3 Total Financial assets Loans $ 895,155 $ 69,711 $ 839,931 $ 909,642 Loans held-for-sale 13,243 12,261 1,012 13,273 Financial liabilities Deposits 1,284,417 1,284,397 — 1,284,397 Long-term debt 228,666 234,878 1,890 236,768 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)	9 Months Ended
	Sep. 30, 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 the three and nine months ended September 30, 2017 and 2016 , and total assets at September 30, 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 three months ended September 30 Total Corporation (1) Consumer Banking (Dollars in millions) 2017 2016 2017 2016 Net interest income (FTE basis) $ 11,401 $ 10,429 $ 6,211 $ 5,289 Noninterest income 10,678 11,434 2,563 2,679 Total revenue, net of interest expense (FTE basis) 22,079 21,863 8,774 7,968 Provision for credit losses 834 850 967 698 Noninterest expense 13,139 13,481 4,459 4,371 Income before income taxes (FTE basis) 8,106 7,532 3,348 2,899 Income tax expense (FTE basis) 2,519 2,577 1,261 1,086 Net income $ 5,587 $ 4,955 $ 2,087 $ 1,813 Period-end total assets $ 2,283,896 $ 2,195,314 $ 742,513 $ 687,241 Global Wealth & Global Banking 2017 2016 2017 2016 Net interest income (FTE basis) $ 1,496 $ 1,394 $ 2,743 $ 2,470 Noninterest income 3,124 2,985 2,243 2,276 Total revenue, net of interest expense (FTE basis) 4,620 4,379 4,986 4,746 Provision for credit losses 16 7 48 118 Noninterest expense 3,370 3,255 2,118 2,152 Income before income taxes (FTE basis) 1,234 1,117 2,820 2,476 Income tax expense (FTE basis) 465 419 1,062 925 Net income $ 769 $ 698 $ 1,758 $ 1,551 Period-end total assets $ 276,187 $ 289,794 $ 423,185 $ 397,869 Global Markets All Other 2017 2016 2017 2016 Net interest income (FTE basis) $ 899 $ 1,119 $ 52 $ 157 Noninterest income 3,001 3,239 (253 ) 255 Total revenue, net of interest expense (FTE basis) 3,900 4,358 (201 ) 412 Provision for credit losses (6 ) 19 (191 ) 8 Noninterest expense 2,710 2,656 482 1,047 Income (loss) before income taxes (FTE basis) 1,196 1,683 (492 ) (643 ) Income tax expense (benefit) (FTE basis) 440 609 (709 ) (462 ) Net income (loss) $ 756 $ 1,074 $ 217 $ (181 ) Period-end total assets $ 629,270 $ 595,165 $ 212,741 $ 225,245 (1) There were no material intersegment revenues. Results of Business Segments and All Other At and for the nine months ended September 30 Total Corporation (1) Consumer Banking (Dollars in millions) 2017 2016 2017 2016 Net interest income (FTE basis) $ 33,879 $ 31,470 $ 17,953 $ 15,825 Noninterest income 33,711 32,907 7,614 7,795 Total revenue, net of interest expense (FTE basis) 67,590 64,377 25,567 23,620 Provision for credit losses 2,395 2,823 2,639 1,955 Noninterest expense 41,713 41,790 13,280 13,324 Income before income taxes (FTE basis) 23,482 19,764 9,648 8,341 Income tax expense (FTE basis) 7,770 6,554 3,638 3,088 Net income $ 15,712 $ 13,210 $ 6,010 $ 5,253 Period-end total assets $ 2,283,896 $ 2,195,314 $ 742,513 $ 687,241 Global Wealth & Global Banking 2017 2016 2017 2016 Net interest income (FTE basis) $ 4,653 $ 4,310 $ 8,229 $ 7,440 Noninterest income 9,254 8,963 6,751 6,456 Total revenue, net of interest expense (FTE basis) 13,907 13,273 14,980 13,896 Provision for credit losses 50 46 80 870 Noninterest expense 10,091 9,816 6,435 6,450 Income before income taxes (FTE basis) 3,766 3,411 8,465 6,576 Income tax expense (FTE basis) 1,420 1,270 3,192 2,435 Net income $ 2,346 $ 2,141 $ 5,273 $ 4,141 Period-end total assets $ 276,187 $ 289,794 $ 423,185 $ 397,869 Global Markets All Other 2017 2016 2017 2016 Net interest income (FTE basis) $ 2,812 $ 3,391 $ 232 $ 504 Noninterest income 9,743 9,227 349 466 Total revenue, net of interest expense (FTE basis) 12,555 12,618 581 970 Provision for credit losses 2 23 (376 ) (71 ) Noninterest expense 8,117 7,690 3,790 4,510 Income (loss) before income taxes (FTE basis) 4,436 4,905 (2,833 ) (3,469 ) Income tax expense (benefit) (FTE basis) 1,553 1,746 (2,033 ) (1,985 ) Net income (loss) $ 2,883 $ 3,159 $ (800 ) $ (1,484 ) Period-end total assets $ 629,270 $ 595,165 $ 212,741 $ 225,245 Business Segment Reconciliations Three Months Ended September 30 Nine Months Ended September 30 2017 2016 2017 2016 Segments’ total revenue, net of interest expense (FTE basis) $ 22,280 $ 21,451 $ 67,009 $ 63,407 Adjustments (2) : ALM activities 273 (43 ) 332 (12 ) Liquidating businesses and other (474 ) 455 249 982 FTE basis adjustment (240 ) (228 ) (674 ) (666 ) Consolidated revenue, net of interest expense $ 21,839 $ 21,635 $ 66,916 $ 63,711 Segments’ total net income 5,370 5,136 16,512 14,694 Adjustments, net-of-taxes (2) : ALM activities 57 (136 ) (208 ) (453 ) Liquidating businesses and other 160 (45 ) (592 ) (1,031 ) Consolidated net income $ 5,587 $ 4,955 $ 15,712 $ 13,210 September 30 2017 2016 Segments’ total assets $ 2,071,155 $ 1,970,069 Adjustments (2) : ALM activities, including securities portfolio 635,305 616,730 Liquidating businesses and other 92,443 116,989 Elimination of segment asset allocations to match liabilities (515,007 ) (508,474 ) Consolidated total assets $ 2,283,896 $ 2,195,314 (1) There were no material intersegment revenues. (2) Adjustments include consolidated income, expense and asset amounts not specifically allocated to individual business segments.

Summary of Significant Accoun42

Summary of Significant Accounting Principles - Principles of Consolidation and Basis of Presentation (Details) - USD ($) $ in Millions	Jun. 01, 2017	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on hedging instrument, tax		$ 2,279	$ 2,349	$ 7,096	$ 5,888
Loans and leases						$ 9,214
Goodwill		$ 0		$ 0		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]
Gain on hedging instrument, tax	$ 690

Derivatives - Derivative Balanc

Derivatives - Derivative Balances (Details) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Derivative Assets [Abstract]
Gross derivative assets	$ 370,700	$ 631,100
Less: Legally enforceable master netting agreements	(296,700)	(545,300)
Less: Cash collateral received/paid	(35,600)	(43,300)
Derivative assets	38,384	42,512
Derivative Liabilities [Abstract]
Gross derivative liabilities	362,400	628,300
Less: Legally enforceable master netting agreements	(296,700)	(545,300)
Less: Cash collateral received/paid	(33,900)	(43,500)
Derivative liabilities	31,781	39,480
Interest Rate Swap
Maximum Payout/Notional
Contract/Notional	18,602,500	16,977,700
Derivative Assets [Abstract]
Gross derivative assets	184,600	390,900
Derivative Liabilities [Abstract]
Gross derivative liabilities	178,000	388,900
Interest Rate Futures and Forwards
Maximum Payout/Notional
Contract/Notional	5,957,200	5,609,500
Derivative Assets [Abstract]
Gross derivative assets	900	2,200
Derivative Liabilities [Abstract]
Gross derivative liabilities	800	2,100
Interest Rate Options | Written options
Maximum Payout/Notional
Contract/Notional	1,467,400	1,146,200
Derivative Assets [Abstract]
Gross derivative assets	0	0
Derivative Liabilities [Abstract]
Gross derivative liabilities	36,300	52,200
Interest Rate Options | Purchased options
Maximum Payout/Notional
Contract/Notional	1,390,700	1,178,700
Derivative Assets [Abstract]
Gross derivative assets	38,500	53,300
Derivative Liabilities [Abstract]
Gross derivative liabilities	0	0
Foreign Exchange Swaps
Maximum Payout/Notional
Contract/Notional	2,011,900	1,828,600
Derivative Assets [Abstract]
Gross derivative assets	39,100	58,800
Derivative Liabilities [Abstract]
Gross derivative liabilities	40,100	65,000
Foreign Exchange Spot Future and Forwards
Maximum Payout/Notional
Contract/Notional	4,313,600	3,410,700
Derivative Assets [Abstract]
Gross derivative assets	47,500	60,500
Derivative Liabilities [Abstract]
Gross derivative liabilities	47,700	57,400
Foreign Exchange Options | Written options
Maximum Payout/Notional
Contract/Notional	367,300	356,600
Derivative Assets [Abstract]
Gross derivative assets	0	0
Derivative Liabilities [Abstract]
Gross derivative liabilities	5,700	9,400
Foreign Exchange Options | Purchased options
Maximum Payout/Notional
Contract/Notional	335,700	342,400
Derivative Assets [Abstract]
Gross derivative assets	5,200	8,900
Derivative Liabilities [Abstract]
Gross derivative liabilities	0	0
Equity Swaps
Maximum Payout/Notional
Contract/Notional	236,200	189,700
Derivative Assets [Abstract]
Gross derivative assets	4,600	3,400
Derivative Liabilities [Abstract]
Gross derivative liabilities	4,600	4,000
Equity Futures and Forwards
Maximum Payout/Notional
Contract/Notional	100,900	68,700
Derivative Assets [Abstract]
Gross derivative assets	1,900	900
Derivative Liabilities [Abstract]
Gross derivative liabilities	1,200	900
Equity Options | Written options
Maximum Payout/Notional
Contract/Notional	524,900	431,500
Derivative Assets [Abstract]
Gross derivative assets	0	0
Derivative Liabilities [Abstract]
Gross derivative liabilities	25,100	21,400
Equity Options | Purchased options
Maximum Payout/Notional
Contract/Notional	467,000	385,500
Derivative Assets [Abstract]
Gross derivative assets	25,200	23,900
Derivative Liabilities [Abstract]
Gross derivative liabilities	0	0
Commodity Swaps
Maximum Payout/Notional
Contract/Notional	47,600	48,200
Derivative Assets [Abstract]
Gross derivative assets	1,700	2,500
Derivative Liabilities [Abstract]
Gross derivative liabilities	4,200	5,100
Commodity Futures and Forwards
Maximum Payout/Notional
Contract/Notional	51,500	49,100
Derivative Assets [Abstract]
Gross derivative assets	3,500	3,600
Derivative Liabilities [Abstract]
Gross derivative liabilities	600	500
Commodity Options | Written options
Maximum Payout/Notional
Contract/Notional	25,000	29,300
Derivative Assets [Abstract]
Gross derivative assets	0	0
Derivative Liabilities [Abstract]
Gross derivative liabilities	1,200	1,900
Commodity Options | Purchased options
Maximum Payout/Notional
Contract/Notional	26,100	28,900
Derivative Assets [Abstract]
Gross derivative assets	1,400	2,000
Derivative Liabilities [Abstract]
Gross derivative liabilities	0	0
Credit Default Swap | Purchased credit derivatives
Maximum Payout/Notional
Contract/Notional	522,800	604,000
Derivative Assets [Abstract]
Gross derivative assets	4,800	8,100
Derivative Liabilities [Abstract]
Gross derivative liabilities	11,200	10,300
Credit Default Swap | Written credit derivatives
Maximum Payout/Notional
Contract/Notional	514,478	614,355
Derivative Assets [Abstract]
Gross derivative assets	10,900	10,700
Derivative Liabilities [Abstract]
Gross derivative liabilities	4,214	7,463
Total return swaps/other | Purchased credit derivatives
Maximum Payout/Notional
Contract/Notional	57,600	21,200
Derivative Assets [Abstract]
Gross derivative assets	100	400
Derivative Liabilities [Abstract]
Gross derivative liabilities	1,300	1,500
Total return swaps/other | Written credit derivatives
Maximum Payout/Notional
Contract/Notional	55,314	25,354
Derivative Assets [Abstract]
Gross derivative assets	800	1,000
Derivative Liabilities [Abstract]
Gross derivative liabilities	192	156
Credit derivatives | Purchased credit derivatives
Derivative Liabilities [Abstract]
Fair value, with identical underlying referenced names and terms	6,200	2,200
Notional amount, with identical underlying referenced names and terms	494,100	548,900
Credit derivatives | Written credit derivatives
Maximum Payout/Notional
Contract/Notional	569,792	639,709
Derivative Liabilities [Abstract]
Gross derivative liabilities	4,406	7,619
Trading and Other Risk Management Derivatives
Derivative Assets [Abstract]
Gross derivative assets	362,200	619,300
Derivative Liabilities [Abstract]
Gross derivative liabilities	357,200	619,300
Trading and Other Risk Management Derivatives | Interest Rate Swap
Derivative Assets [Abstract]
Gross derivative assets	179,500	385,000
Derivative Liabilities [Abstract]
Gross derivative liabilities	176,700	386,900
Trading and Other Risk Management Derivatives | Interest Rate Futures and Forwards
Derivative Assets [Abstract]
Gross derivative assets	900	2,200
Derivative Liabilities [Abstract]
Gross derivative liabilities	800	2,100
Trading and Other Risk Management Derivatives | Interest Rate Options | Written options
Derivative Assets [Abstract]
Gross derivative assets	0	0
Derivative Liabilities [Abstract]
Gross derivative liabilities	36,300	52,200
Trading and Other Risk Management Derivatives | Interest Rate Options | Purchased options
Derivative Assets [Abstract]
Gross derivative assets	38,500	53,300
Derivative Liabilities [Abstract]
Gross derivative liabilities	0	0
Trading and Other Risk Management Derivatives | Foreign Exchange Swaps
Derivative Assets [Abstract]
Gross derivative assets	36,600	54,600
Derivative Liabilities [Abstract]
Gross derivative liabilities	37,000	58,800
Trading and Other Risk Management Derivatives | Foreign Exchange Spot Future and Forwards
Derivative Assets [Abstract]
Gross derivative assets	46,600	58,800
Derivative Liabilities [Abstract]
Gross derivative liabilities	46,900	56,600
Trading and Other Risk Management Derivatives | Foreign Exchange Options | Written options
Derivative Assets [Abstract]
Gross derivative assets	0	0
Derivative Liabilities [Abstract]
Gross derivative liabilities	5,700	9,400
Trading and Other Risk Management Derivatives | Foreign Exchange Options | Purchased options
Derivative Assets [Abstract]
Gross derivative assets	5,200	8,900
Derivative Liabilities [Abstract]
Gross derivative liabilities	0	0
Trading and Other Risk Management Derivatives | Equity Swaps
Derivative Assets [Abstract]
Gross derivative assets	4,600	3,400
Derivative Liabilities [Abstract]
Gross derivative liabilities	4,600	4,000
Trading and Other Risk Management Derivatives | Equity Futures and Forwards
Derivative Assets [Abstract]
Gross derivative assets	1,900	900
Derivative Liabilities [Abstract]
Gross derivative liabilities	1,200	900
Trading and Other Risk Management Derivatives | Equity Options | Written options
Derivative Assets [Abstract]
Gross derivative assets	0	0
Derivative Liabilities [Abstract]
Gross derivative liabilities	25,100	21,400
Trading and Other Risk Management Derivatives | Equity Options | Purchased options
Derivative Assets [Abstract]
Gross derivative assets	25,200	23,900
Derivative Liabilities [Abstract]
Gross derivative liabilities	0	0
Trading and Other Risk Management Derivatives | Commodity Swaps
Derivative Assets [Abstract]
Gross derivative assets	1,700	2,500
Derivative Liabilities [Abstract]
Gross derivative liabilities	4,200	5,100
Trading and Other Risk Management Derivatives | Commodity Futures and Forwards
Derivative Assets [Abstract]
Gross derivative assets	3,500	3,600
Derivative Liabilities [Abstract]
Gross derivative liabilities	600	500
Trading and Other Risk Management Derivatives | Commodity Options | Written options
Derivative Assets [Abstract]
Gross derivative assets	0	0
Derivative Liabilities [Abstract]
Gross derivative liabilities	1,200	1,900
Trading and Other Risk Management Derivatives | Commodity Options | Purchased options
Derivative Assets [Abstract]
Gross derivative assets	1,400	2,000
Derivative Liabilities [Abstract]
Gross derivative liabilities	0	0
Trading and Other Risk Management Derivatives | Credit Default Swap | Purchased credit derivatives
Derivative Assets [Abstract]
Gross derivative assets	4,800	8,100
Derivative Liabilities [Abstract]
Gross derivative liabilities	11,200	10,300
Trading and Other Risk Management Derivatives | Credit Default Swap | Written credit derivatives
Derivative Assets [Abstract]
Gross derivative assets	10,900	10,700
Derivative Liabilities [Abstract]
Gross derivative liabilities	4,200	7,500
Trading and Other Risk Management Derivatives | Total return swaps/other | Purchased credit derivatives
Derivative Assets [Abstract]
Gross derivative assets	100	400
Derivative Liabilities [Abstract]
Gross derivative liabilities	1,300	1,500
Trading and Other Risk Management Derivatives | Total return swaps/other | Written credit derivatives
Derivative Assets [Abstract]
Gross derivative assets	800	1,000
Derivative Liabilities [Abstract]
Gross derivative liabilities	200	200
Qualifying Accounting Hedges
Derivative Assets [Abstract]
Gross derivative assets	8,500	11,800
Derivative Liabilities [Abstract]
Gross derivative liabilities	5,200	9,000
Qualifying Accounting Hedges | Interest Rate Swap
Derivative Assets [Abstract]
Gross derivative assets	5,100	5,900
Derivative Liabilities [Abstract]
Gross derivative liabilities	1,300	2,000
Qualifying Accounting Hedges | Interest Rate Futures and Forwards
Derivative Assets [Abstract]
Gross derivative assets	0	0
Derivative Liabilities [Abstract]
Gross derivative liabilities	0	0
Qualifying Accounting Hedges | Interest Rate Options | Written options
Derivative Assets [Abstract]
Gross derivative assets	0	0
Derivative Liabilities [Abstract]
Gross derivative liabilities	0	0
Qualifying Accounting Hedges | Interest Rate Options | Purchased options
Derivative Assets [Abstract]
Gross derivative assets	0	0
Derivative Liabilities [Abstract]
Gross derivative liabilities	0	0
Qualifying Accounting Hedges | Foreign Exchange Swaps
Derivative Assets [Abstract]
Gross derivative assets	2,500	4,200
Derivative Liabilities [Abstract]
Gross derivative liabilities	3,100	6,200
Qualifying Accounting Hedges | Foreign Exchange Spot Future and Forwards
Derivative Assets [Abstract]
Gross derivative assets	900	1,700
Derivative Liabilities [Abstract]
Gross derivative liabilities	800	800
Qualifying Accounting Hedges | Foreign Exchange Options | Written options
Derivative Assets [Abstract]
Gross derivative assets	0	0
Derivative Liabilities [Abstract]
Gross derivative liabilities	0	0
Qualifying Accounting Hedges | Foreign Exchange Options | Purchased options
Derivative Assets [Abstract]
Gross derivative assets	0	0
Derivative Liabilities [Abstract]
Gross derivative liabilities	0	0
Qualifying Accounting Hedges | Equity Swaps
Derivative Assets [Abstract]
Gross derivative assets	0	0
Derivative Liabilities [Abstract]
Gross derivative liabilities	0	0
Qualifying Accounting Hedges | Equity Futures and Forwards
Derivative Assets [Abstract]
Gross derivative assets	0	0
Derivative Liabilities [Abstract]
Gross derivative liabilities	0	0
Qualifying Accounting Hedges | Equity Options | Written options
Derivative Assets [Abstract]
Gross derivative assets	0	0
Derivative Liabilities [Abstract]
Gross derivative liabilities	0	0
Qualifying Accounting Hedges | Equity Options | Purchased options
Derivative Assets [Abstract]
Gross derivative assets	0	0
Derivative Liabilities [Abstract]
Gross derivative liabilities	0	0
Qualifying Accounting Hedges | Commodity Swaps
Derivative Assets [Abstract]
Gross derivative assets	0	0
Derivative Liabilities [Abstract]
Gross derivative liabilities	0	0
Qualifying Accounting Hedges | Commodity Futures and Forwards
Derivative Assets [Abstract]
Gross derivative assets	0	0
Derivative Liabilities [Abstract]
Gross derivative liabilities	0	0
Qualifying Accounting Hedges | Commodity Options | Written options
Derivative Assets [Abstract]
Gross derivative assets	0	0
Derivative Liabilities [Abstract]
Gross derivative liabilities	0	0
Qualifying Accounting Hedges | Commodity Options | Purchased options
Derivative Assets [Abstract]
Gross derivative assets	0	0
Derivative Liabilities [Abstract]
Gross derivative liabilities	0	0
Qualifying Accounting Hedges | Credit Default Swap | Purchased credit derivatives
Derivative Assets [Abstract]
Gross derivative assets	0	0
Derivative Liabilities [Abstract]
Gross derivative liabilities	0	0
Qualifying Accounting Hedges | Credit Default Swap | Written credit derivatives
Derivative Assets [Abstract]
Gross derivative assets	0	0
Derivative Liabilities [Abstract]
Gross derivative liabilities	0	0
Qualifying Accounting Hedges | Total return swaps/other | Purchased credit derivatives
Derivative Assets [Abstract]
Gross derivative assets	0	0
Derivative Liabilities [Abstract]
Gross derivative liabilities	0	0
Qualifying Accounting Hedges | Total return swaps/other | Written credit derivatives
Derivative Assets [Abstract]
Gross derivative assets	0	0
Derivative Liabilities [Abstract]
Gross derivative liabilities	$ 0	$ 0

Derivatives - Offsetting Assets

Derivatives - Offsetting Assets (Details) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Offsetting Assets [Line Items]
Derivative assets, after netting	$ 25,400	$ 31,900
Other gross derivative assets	13,000	10,600
Derivative assets	38,384	42,512
Less: Financial instruments collateral	(11,300)	(13,500)
Total net derivative assets	27,100	29,000
Over-the-counter
Offsetting Assets [Line Items]
Total gross derivative assets, before netting	338,400	426,200
Less: Legally enforceable master netting agreements and cash collateral received	(314,900)	(398,200)
Exchange-traded
Offsetting Assets [Line Items]
Total gross derivative assets, before netting	10,200	12,500
Less: Legally enforceable master netting agreements and cash collateral received	(9,200)	(8,900)
Over-the-counter cleared (2)
Offsetting Assets [Line Items]
Total gross derivative assets, before netting	9,100	181,800
Less: Legally enforceable master netting agreements and cash collateral received	(8,200)	(181,500)
Interest rate contracts | Over-the-counter
Offsetting Assets [Line Items]
Total gross derivative assets, before netting	219,100	267,300
Interest rate contracts | Over-the-counter cleared (2)
Offsetting Assets [Line Items]
Total gross derivative assets, before netting	2,300	177,200
Foreign exchange risk | Over-the-counter
Offsetting Assets [Line Items]
Total gross derivative assets, before netting	88,200	124,300
Foreign exchange risk | Over-the-counter cleared (2)
Offsetting Assets [Line Items]
Total gross derivative assets, before netting	700	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	9,500	11,400
Commodity contracts | Over-the-counter
Offsetting Assets [Line Items]
Total gross derivative assets, before netting	2,700	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	44	43
Credit derivatives | Over-the-counter
Offsetting Assets [Line Items]
Total gross derivative assets, before netting	10,100	15,300
Credit derivatives | Over-the-counter cleared (2)
Offsetting Assets [Line Items]
Total gross derivative assets, before netting	$ 6,100	$ 4,300

Derivatives - Offsetting Liabil

Derivatives - Offsetting Liabilities (Details) $ in Millions	9 Months Ended
	Sep. 30, 2017USD ($)counterparty	Dec. 31, 2016USD ($)
Offsetting Liabilities [Line Items]
Derivative liabilities, after netting	$ 22,400	$ 28,600
Other gross derivative liabilities	9,400	10,900
Derivative liabilities	31,781	39,480
Less: Financial instruments collateral	(9,600)	(10,500)
Total net derivative liabilities	$ 22,200	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	$ 333,800	418,200
Less: Legally enforceable master netting agreements and cash collateral paid	(312,800)	(392,600)
Exchange-traded
Offsetting Liabilities [Line Items]
Total gross derivative liabilities, before netting	10,300	11,800
Less: Legally enforceable master netting agreements and cash collateral paid	(9,200)	(8,900)
Over-the-counter cleared (2)
Offsetting Liabilities [Line Items]
Total gross derivative liabilities, before netting	8,900	187,400
Less: Legally enforceable master netting agreements and cash collateral paid	(8,600)	(187,300)
Interest rate contracts | Over-the-counter
Offsetting Liabilities [Line Items]
Total gross derivative liabilities, before netting	211,300	258,200
Interest rate contracts | Over-the-counter cleared (2)
Offsetting Liabilities [Line Items]
Total gross derivative liabilities, before netting	2,300	182,800
Foreign exchange risk | Over-the-counter
Offsetting Liabilities [Line Items]
Total gross derivative liabilities, before netting	90,700	126,700
Foreign exchange risk | Over-the-counter cleared (2)
Offsetting Liabilities [Line Items]
Total gross derivative liabilities, before netting	600	300
Equity contracts | Over-the-counter
Offsetting Liabilities [Line Items]
Total gross derivative liabilities, before netting	17,300	13,700
Equity contracts | Exchange-traded
Offsetting Liabilities [Line Items]
Total gross derivative liabilities, before netting	9,700	10,800
Commodity contracts | Over-the-counter
Offsetting Liabilities [Line Items]
Total gross derivative liabilities, before netting	4,000	4,900
Commodity contracts | Exchange-traded
Offsetting Liabilities [Line Items]
Total gross derivative liabilities, before netting	600	1,000
Credit derivatives
Offsetting Liabilities [Line Items]
Total gross derivative liabilities, before netting	5	10
Credit derivatives | Over-the-counter
Offsetting Liabilities [Line Items]
Total gross derivative liabilities, before netting	10,500	14,700
Credit derivatives | Over-the-counter cleared (2)
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	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Effect of Fair Value Hedges on Results of Operations [Abstract]
Derivative	$ 326	$ (501)	$ 817	$ 3,395
Hedged Item	(418)	314	(1,258)	(3,943)
Hedge Ineffectiveness	(92)	(187)	(441)	(548)
Interest rate risk on long-term debt | Interest expense
Effect of Fair Value Hedges on Results of Operations [Abstract]
Derivative	(273)	(758)	(751)	3,166
Hedged Item	169	580	313	(3,654)
Hedge Ineffectiveness	(104)	(178)	(438)	(488)
Interest rate and foreign currency risk on long-term debt | Interest expense
Effect of Fair Value Hedges on Results of Operations [Abstract]
Derivative	607	16	1,631	360
Hedged Item	(593)	(10)	(1,603)	(369)
Hedge Ineffectiveness	14	6	28	(9)
Interest rate risk on AFS securities | Interest income
Effect of Fair Value Hedges on Results of Operations [Abstract]
Derivative	(8)	235	(71)	(131)
Hedged Item	7	(250)	40	80
Hedge Ineffectiveness	(1)	(15)	(31)	(51)
Price risk on commodity inventory | Trading gain (loss)
Effect of Fair Value Hedges on Results of Operations [Abstract]
Derivative	0	6	8	0
Hedged Item	(1)	(6)	(8)	0
Hedge Ineffectiveness	$ (1)	$ 0	$ 0	$ 0

Derivatives - Derivatives Des47

Derivatives - Derivatives Designated as Cash Flow and Net Investment Hedges (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Cash flow hedges
Derivative Instruments, Gain (Loss) [Line Items]
Gains (Losses) Recognized in Accumulated OCI on Derivatives	$ 18	$ 77	$ 79	$ (64)
Gains (Losses) in Income Reclassified from Accumulated OCI	(22)	(127)	(171)	(508)
Hedge Ineffectiveness and Amounts Excluded from Effectiveness Testing	(1)	(4)	4	2
Interest rate risk on variable-rate portfolios | Cash flow hedges
Derivative Instruments, Gain (Loss) [Line Items]
Gains (Losses) Recognized in Accumulated OCI on Derivatives	11	(8)	38	50
Gains (Losses) in Income Reclassified from Accumulated OCI	(54)	(119)	(274)	(447)
Hedge Ineffectiveness and Amounts Excluded from Effectiveness Testing	(1)	(4)	4	2
Price risk on restricted stock awards | Cash flow hedges
Derivative Instruments, Gain (Loss) [Line Items]
Gains (Losses) Recognized in Accumulated OCI on Derivatives	7	85	41	(114)
Gains (Losses) in Income Reclassified from Accumulated OCI	32	(8)	103	(61)
Hedge Ineffectiveness and Amounts Excluded from Effectiveness Testing	0	0	0	0
Foreign exchange risk | Net investment hedges
Derivative Instruments, Gain (Loss) [Line Items]
Gains (Losses) Recognized in Accumulated OCI on Derivatives	(427)	214	(1,541)	173
Gains (Losses) in Income Reclassified from Accumulated OCI	(3)	2	1,811	3
Hedge Ineffectiveness and Amounts Excluded from Effectiveness Testing	$ (33)	$ (68)	$ (82)	$ (234)

Derivatives - Other Risk Manage

Derivatives - Other Risk Management Derivatives (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Other
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivatives not designated as hedging	$ 0	$ 0	$ 5	$ 40
Interest rate lock commitments
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivatives not designated as hedging	76	185	192	514
Mortgage banking income | Interest rate risk on mortgage banking income
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivatives not designated as hedging	1	57	32	882
Other income | Credit risk on loans
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivatives not designated as hedging	0	(7)	(3)	(103)
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	26	(262)	(26)	(1,970)
Personnel expense | Price risk on restricted stock awards
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivatives not designated as hedging	$ 33	$ 199	$ 161	$ (569)

Derivatives - Sales and Trading

Derivatives - Sales and Trading Revenue (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Trading Activity, Gains and Losses, Net [Line Items]
Sales and trading revenue	$ 1,837	$ 2,141	$ 6,124	$ 5,821
Brokerage commissions and asset management fee revenue | Global Markets
Trading Activity, Gains and Losses, Net [Line Items]
Sales and trading revenue	488	485	1,500	1,600
Trading Securities
Trading Activity, Gains and Losses, Net [Line Items]
Sales and trading revenue	3,066	3,551	10,076	10,443
Trading Securities | Trading Account Profits
Trading Activity, Gains and Losses, Net [Line Items]
Sales and trading revenue	1,714	1,934	5,634	5,401
Trading Securities | Net Interest Income
Trading Activity, Gains and Losses, Net [Line Items]
Sales and trading revenue	716	975	2,293	2,957
Trading Securities | Other
Trading Activity, Gains and Losses, Net [Line Items]
Sales and trading revenue	636	642	2,149	2,085
Trading Securities | Interest rate risk
Trading Activity, Gains and Losses, Net [Line Items]
Sales and trading revenue	756	901	2,203	2,713
Trading Securities | Interest rate risk | Trading Account Profits
Trading Activity, Gains and Losses, Net [Line Items]
Sales and trading revenue	441	511	1,115	1,430
Trading Securities | Interest rate risk | Net Interest Income
Trading Activity, Gains and Losses, Net [Line Items]
Sales and trading revenue	224	307	763	1,073
Trading Securities | Interest rate risk | Other
Trading Activity, Gains and Losses, Net [Line Items]
Sales and trading revenue	91	83	325	210
Trading Securities | Foreign exchange risk
Trading Activity, Gains and Losses, Net [Line Items]
Sales and trading revenue	310	276	942	884
Trading Securities | Foreign exchange risk | Trading Account Profits
Trading Activity, Gains and Losses, Net [Line Items]
Sales and trading revenue	348	319	1,063	1,003
Trading Securities | Foreign exchange risk | Net Interest Income
Trading Activity, Gains and Losses, Net [Line Items]
Sales and trading revenue	2	(4)	(2)	(7)
Trading Securities | Foreign exchange risk | Other
Trading Activity, Gains and Losses, Net [Line Items]
Sales and trading revenue	(40)	(39)	(119)	(112)
Trading Securities | Equity risk
Trading Activity, Gains and Losses, Net [Line Items]
Sales and trading revenue	962	961	3,142	3,069
Trading Securities | Equity risk | Trading Account Profits
Trading Activity, Gains and Losses, Net [Line Items]
Sales and trading revenue	640	463	2,088	1,481
Trading Securities | Equity risk | Net Interest Income
Trading Activity, Gains and Losses, Net [Line Items]
Sales and trading revenue	(142)	31	(372)	15
Trading Securities | Equity risk | Other
Trading Activity, Gains and Losses, Net [Line Items]
Sales and trading revenue	464	467	1,426	1,573
Trading Securities | Credit risk
Trading Activity, Gains and Losses, Net [Line Items]
Sales and trading revenue	979	1,355	3,536	3,499
Trading Securities | Credit risk | Trading Account Profits
Trading Activity, Gains and Losses, Net [Line Items]
Sales and trading revenue	251	598	1,200	1,224
Trading Securities | Credit risk | Net Interest Income
Trading Activity, Gains and Losses, Net [Line Items]
Sales and trading revenue	624	634	1,886	1,895
Trading Securities | Credit risk | Other
Trading Activity, Gains and Losses, Net [Line Items]
Sales and trading revenue	104	123	450	380
Trading Securities | Other risk
Trading Activity, Gains and Losses, Net [Line Items]
Sales and trading revenue	59	58	253	278
Trading Securities | Other risk | Trading Account Profits
Trading Activity, Gains and Losses, Net [Line Items]
Sales and trading revenue	34	43	168	263
Trading Securities | Other risk | Net Interest Income
Trading Activity, Gains and Losses, Net [Line Items]
Sales and trading revenue	8	7	18	(19)
Trading Securities | Other risk | Other
Trading Activity, Gains and Losses, Net [Line Items]
Sales and trading revenue	$ 17	$ 8	$ 67	$ 34

Derivatives - Credit Derivative

Derivatives - Credit Derivatives (Details) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Carrying Value of Credit Derivatives
Total	$ 362,400	$ 628,300
Carrying Value of Credit-related Notes
Less than One Year	20	70
One to Three Years	12	34
Three to Five Years	115	602
Over Five Years	2,118	2,741
Total	2,265	3,447
Credit Default Swap | Written credit derivatives
Carrying Value of Credit Derivatives
Less than One Year	247	781
One to Three Years	598	1,117
Three to Five Years	637	1,443
Over Five Years	2,732	4,122
Total	4,214	7,463
Maximum Payout/Notional
Less than One Year	139,529	205,838
One to Three Years	161,489	210,360
Three to Five Years	153,969	157,541
Over Five Years	59,491	40,616
Total	514,478	614,355
Total return swaps/other | Written credit derivatives
Carrying Value of Credit Derivatives
Less than One Year	192	143
One to Three Years	0	10
Three to Five Years	0	2
Over Five Years	0	1
Total	192	156
Maximum Payout/Notional
Less than One Year	49,975	19,430
One to Three Years	4,792	5,127
Three to Five Years	143	589
Over Five Years	404	208
Total	55,314	25,354
Credit derivatives | Written credit derivatives
Carrying Value of Credit Derivatives
Less than One Year	439	924
One to Three Years	598	1,127
Three to Five Years	637	1,445
Over Five Years	2,732	4,123
Total	4,406	7,619
Maximum Payout/Notional
Less than One Year	189,504	225,268
One to Three Years	166,281	215,487
Three to Five Years	154,112	158,130
Over Five Years	59,895	40,824
Total	569,792	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	84	542
Over Five Years	702	1,423
Total	786	1,977
Investment grade | Credit Default Swap | Written credit derivatives
Carrying Value of Credit Derivatives
Less than One Year	10	10
One to Three Years	27	64
Three to Five Years	175	535
Over Five Years	389	783
Total	601	1,392
Maximum Payout/Notional
Less than One Year	76,594	121,083
One to Three Years	117,714	143,200
Three to Five Years	109,875	116,540
Over Five Years	38,025	21,905
Total	342,208	402,728
Investment grade | Total return swaps/other | Written credit derivatives
Carrying Value of Credit Derivatives
Less than One Year	39	16
One to Three Years	0	0
Three to Five Years	0	0
Over Five Years	0	0
Total	39	16
Maximum Payout/Notional
Less than One Year	36,743	12,792
One to Three Years	0	0
Three to Five Years	0	0
Over Five Years	0	0
Total	36,743	12,792
Non-investment grade
Carrying Value of Credit-related Notes
Less than One Year	20	70
One to Three Years	12	22
Three to Five Years	31	60
Over Five Years	1,416	1,318
Total	1,479	1,470
Non-investment grade | Credit Default Swap | Written credit derivatives
Carrying Value of Credit Derivatives
Less than One Year	237	771
One to Three Years	571	1,053
Three to Five Years	462	908
Over Five Years	2,343	3,339
Total	3,613	6,071
Maximum Payout/Notional
Less than One Year	62,935	84,755
One to Three Years	43,775	67,160
Three to Five Years	44,094	41,001
Over Five Years	21,466	18,711
Total	172,270	211,627
Non-investment grade | Total return swaps/other | Written credit derivatives
Carrying Value of Credit Derivatives
Less than One Year	153	127
One to Three Years	0	10
Three to Five Years	0	2
Over Five Years	0	1
Total	153	140
Maximum Payout/Notional
Less than One Year	13,232	6,638
One to Three Years	4,792	5,127
Three to Five Years	143	589
Over Five Years	404	208
Total	$ 18,571	$ 12,562

Derivatives - Credit-related Co

Derivatives - Credit-related Contingent Features and Collateral (Details) $ in Millions	Sep. 30, 2017USD ($)
Derivative [Line Items]
Additional collateral required to be posted upon downgrade, one incremental notch	$ 512
Additional collateral required to be posted upon downgrade, second incremental notch	668
Credit derivatives
Derivative [Line Items]
Derivative liability subject to unilateral termination upon downgrade, one incremental notch	468
Derivative liability subject to unilateral termination upon downgrade, second incremental notch	1,122
Collateral posted subject to unilateral termination upon downgrade, one incremental notch	387
Collateral posted subject to unilateral termination upon downgrade, second incremental notch	857
Bank of America, N.A.
Derivative [Line Items]
Additional collateral required to be posted upon downgrade, one incremental notch	387
Additional collateral required to be posted upon downgrade, second incremental notch	$ 300

Derivatives - Derivative Valuat

Derivatives - Derivative Valuation Adjustments (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Gross
Derivative assets (CVA)	$ 23	$ 280	$ 281	$ 45
Derivative assets/liabilities (FVA)	37	42	113	9
Derivative liabilities (DVA)	29	(125)	(249)	106
Net
Derivative assets (CVA)	15	66	93	151
Derivative assets/liabilities (FVA)	43	51	140	20
Derivative liabilities (DVA)	17	$ (103)	(201)	$ (60)
Cumulative credit valuation adjustment	726		726		$ 1,000
Cumulative funding valuation adjustment	182		182		296
Cumulative debit valuation adjustment	$ 525		$ 525		$ 774

Derivatives - Narrative (Detail

Derivatives - Narrative (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2016	Dec. 31, 2015
Derivative [Line Items]
Shareholders’ equity	$ 272,459	$ 266,840	$ 270,083	$ 256,176
Net losses in AOCI expected to be reclassified, after tax	102
Net losses in AOCI expected to be reclassified	$ 164
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	$ 44	43
Derivative liability	5	10
Cash and securities held as collateral	77,400	85,500
Cash and securities collateral posted	58,400	71,100
Collateral not yet posted	2,000
Aggregate fair value of derivative liability	23
Credit derivatives | Bank of America, N.A.
Derivative [Line Items]
Collateral not yet posted	1,200
Foreign Mortgage-backed Securities and Foreign Securities
Derivative [Line Items]
Transfer of mortgage-backed securities to third-party trust	6,200	6,600
Gross cash proceeds from transfer of securities	6,200	6,600
Fair value of securities transferred	6,300	6,300
Derivatives
Derivative [Line Items]
Shareholders’ equity	(739)	$ (895)	$ (800)	$ (1,077)
Accumulated other comprehensive income (loss) before tax	$ (1,200)

Securities - Debt Securities an

Securities - Debt Securities and Available-for-Sale Marketable Equity Securities (Details) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Available-for-sale Debt Securities:
Amortized Cost	$ 300,817
Amortized Cost		$ 296,579
Gross Unrealized Gains	1,627	1,280
Gross Unrealized Losses	(2,142)	(3,300)
Debt securities carried at fair value	300,302
Fair Value		294,559
Less: Available-for-sale securities of business held for sale		(619)
Other Debt Securities, Carried at Fair Value:
Amortized Cost	16,265	19,748
Gross Unrealized Gains	345	121
Gross Unrealized Losses	(48)	(149)
Fair Value	16,562	19,720
Debt securities carried at fair value:
Amortized Cost	317,082	315,708
Gross Unrealized Gains	1,972	1,401
Gross Unrealized Losses	(2,190)	(3,449)
Debt securities carried at fair value	316,864	313,660
Held-to-maturity Securities:
Amortized Cost	122,345	117,071
Gross Unrealized Gains	267	248
Gross Unrealized Losses	(1,427)	(2,034)
Held-to-maturity, fair value	121,185	115,285
Debt securities:
Amortized Cost	439,427	432,779
Gross Unrealized Gains	2,239	1,649
Gross Unrealized Losses	(3,617)	(5,483)
Fair Value	438,049	428,945
Nonperforming Financing Receivable
Available-for-sale Debt Securities:
Debt securities carried at fair value	121	121
FNMA
Debt securities carried at fair value:
Amortized Cost	165,100	156,400
Debt securities carried at fair value	164,200	154,400
FHLMC
Debt securities carried at fair value:
Amortized Cost	48,200	48,700
Debt securities carried at fair value	48,100	48,300
Other assets
Available-for-sale Equity Securities:
Amortized Cost	22	325
Gross Unrealized Gains	28	51
Gross Unrealized Losses	0	(1)
Fair Value	50	375
Agency
Available-for-sale Debt Securities:
Amortized Cost	196,530	190,809
Gross Unrealized Gains	850	640
Gross Unrealized Losses	(1,186)	(1,963)
Debt securities carried at fair value	196,194	189,486
Debt securities carried at fair value:
Debt securities carried at fair value	196,194
Agency-collateralized mortgage obligations
Available-for-sale Debt Securities:
Amortized Cost	7,021	8,296
Gross Unrealized Gains	73	85
Gross Unrealized Losses	(45)	(51)
Debt securities carried at fair value	7,049	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	7,054
Commercial
Available-for-sale Debt Securities:
Amortized Cost	12,584	12,594
Gross Unrealized Gains	48	21
Gross Unrealized Losses	(168)	(293)
Debt securities carried at fair value	12,464	12,322
Debt securities carried at fair value:
Debt securities carried at fair value	12,464
Non-agency residential
Available-for-sale Debt Securities:
Amortized Cost	2,345	1,863
Gross Unrealized Gains	333	181
Gross Unrealized Losses	(21)	(31)
Debt securities carried at fair value	2,657	2,013
Other Debt Securities, Carried at Fair Value:
Fair Value	3,058	$ 3,139
Debt securities carried at fair value:
Debt securities carried at fair value	$ 5,715
Non-agency residential | Prime
Available-for-sale Equity Securities:
Available-for-sale securities, percent held by rating	70.00%	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	17.00%	21.00%
Mortgage-backed securities
Available-for-sale Debt Securities:
Amortized Cost	$ 218,480	$ 213,562
Gross Unrealized Gains	1,304	927
Gross Unrealized Losses	(1,420)	(2,338)
Debt securities carried at fair value	218,364	212,151
Other Debt Securities, Carried at Fair Value:
Fair Value	3,063	3,144
Debt securities carried at fair value:
Debt securities carried at fair value	221,427
U.S. Treasury and agency securities
Available-for-sale Debt Securities:
Amortized Cost	50,824	48,800
Gross Unrealized Gains	70	204
Gross Unrealized Losses	(626)	(752)
Debt securities carried at fair value	50,268	48,252
Debt securities carried at fair value:
Debt securities carried at fair value	50,268
Non-U.S. securities
Available-for-sale Debt Securities:
Amortized Cost	5,432
Amortized Cost		6,372
Gross Unrealized Gains	9	13
Gross Unrealized Losses	(1)	(3)
Debt securities carried at fair value	5,440
Fair Value		6,382
Other Debt Securities, Carried at Fair Value:
Fair Value	13,260	16,336
Debt securities carried at fair value:
Debt securities carried at fair value	18,700
Other taxable securities, substantially all asset-backed securities
Available-for-sale Debt Securities:
Amortized Cost	6,964	10,573
Gross Unrealized Gains	77	64
Gross Unrealized Losses	(3)	(23)
Debt securities carried at fair value	7,038	10,614
Other Debt Securities, Carried at Fair Value:
Fair Value	239	240
Debt securities carried at fair value:
Debt securities carried at fair value	7,277
Total taxable securities
Available-for-sale Debt Securities:
Amortized Cost	281,700
Amortized Cost		279,307
Gross Unrealized Gains	1,460	1,208
Gross Unrealized Losses	(2,050)	(3,116)
Debt securities carried at fair value	281,110
Fair Value		277,399
Debt securities carried at fair value:
Debt securities carried at fair value	297,672
Tax-exempt securities
Available-for-sale Debt Securities:
Amortized Cost	19,117	17,272
Gross Unrealized Gains	167	72
Gross Unrealized Losses	(92)	(184)
Debt securities carried at fair value	19,192	$ 17,160
Debt securities carried at fair value:
Debt securities carried at fair value	19,192
Debt securities
Debt securities carried at fair value:
Debt securities carried at fair value	316,864
Available-for-sale Equity Securities:
Shareholders’ equity	(312)
Accumulated other comprehensive income tax expense (benefit)	$ (203)

Securities - Other Debt Securit

Securities - Other Debt Securities Carried at Fair Value (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Other Debt Securities Carried at Fair Value [Line Items]
Other debt securities carried at fair value	$ 16,562		$ 16,562		$ 19,720
Other income
Other Debt Securities Carried at Fair Value [Line Items]
Unrealized mark-to-market net gains (losses)	124	$ 47	323	$ (25)
Realized net gains (losses)	(11)	$ (28)	(129)	$ (65)
Agency-collateralized mortgage obligations
Other Debt Securities Carried at Fair Value [Line Items]
Other debt securities carried at fair value	5		5		5
Non-agency residential
Other Debt Securities Carried at Fair Value [Line Items]
Other debt securities carried at fair value	3,058		3,058		3,139
Mortgage-backed securities
Other Debt Securities Carried at Fair Value [Line Items]
Other debt securities carried at fair value	3,063		3,063		3,144
Non-U.S. securities
Other Debt Securities Carried at Fair Value [Line Items]
Other debt securities carried at fair value	13,260		13,260		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	$ 239		$ 239		$ 240

Securities - Gains and Losses o

Securities - Gains and Losses on Sales of AFS Debt Securities (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Available-for-sale Securities, Gross Realized Gain (Loss) [Abstract]
Net gains on sales of AFS debt securities			$ 278	$ 490
Debt securities
Available-for-sale Securities, Gross Realized Gain (Loss) [Abstract]
Gross gains	$ 130	$ 57	286	513
Gross losses	(5)	(6)	(8)	(23)
Net gains on sales of AFS debt securities	125	51	278	490
Income tax expense attributable to realized net gains on sales of AFS debt securities	$ 48	$ 19	$ 106	$ 186

Securities - Temporarily Impair

Securities - Temporarily Impaired and Other-than-temporarily Impaired AFS Debt Securities (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2017	Dec. 31, 2016
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Credit-related OTTI losses	$ 0	$ 33
Other than temporary impairment losses recorded on debt securities	2	14
Cumulative credit losses on debt securities held	284	284	$ 248
Debt securities
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than Twelve Months, Fair Value	124,937	124,937	181,821
Less than Twelve Months, Gross Unrealized Losses	(908)	(908)	(3,072)
Twelve Months or Longer, Fair Value	41,689	41,689	8,856
Twelve Months or Longer, Gross Unrealized Losses	(1,234)	(1,234)	(228)
Total, Fair Value	166,626	166,626	190,677
Total, Gross Unrealized Losses	(2,142)	(2,142)	(3,300)
Temporarily impaired AFS debt securities | Debt securities
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than Twelve Months, Fair Value	124,910	124,910	181,727
Less than Twelve Months, Gross Unrealized Losses	(907)	(907)	(3,071)
Twelve Months or Longer, Fair Value	41,659	41,659	8,455
Twelve Months or Longer, Gross Unrealized Losses	(1,229)	(1,229)	(212)
Total, Fair Value	166,569	166,569	190,182
Total, Gross Unrealized Losses	(2,136)	(2,136)	(3,283)
Temporarily impaired AFS debt securities | Agency
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than Twelve Months, Fair Value	96,106	96,106	135,210
Less than Twelve Months, Gross Unrealized Losses	(681)	(681)	(1,846)
Twelve Months or Longer, Fair Value	17,570	17,570	3,770
Twelve Months or Longer, Gross Unrealized Losses	(505)	(505)	(117)
Total, Fair Value	113,676	113,676	138,980
Total, Gross Unrealized Losses	(1,186)	(1,186)	(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	2,137	2,137	3,229
Less than Twelve Months, Gross Unrealized Losses	(15)	(15)	(25)
Twelve Months or Longer, Fair Value	1,051	1,051	1,028
Twelve Months or Longer, Gross Unrealized Losses	(30)	(30)	(26)
Total, Fair Value	3,188	3,188	4,257
Total, Gross Unrealized Losses	(45)	(45)	(51)
Temporarily impaired AFS debt securities | Commercial
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than Twelve Months, Fair Value	5,068	5,068	9,018
Less than Twelve Months, Gross Unrealized Losses	(59)	(59)	(293)
Twelve Months or Longer, Fair Value	2,819	2,819	0
Twelve Months or Longer, Gross Unrealized Losses	(109)	(109)	0
Total, Fair Value	7,887	7,887	9,018
Total, Gross Unrealized Losses	(168)	(168)	(293)
Temporarily impaired AFS debt securities | Non-agency residential
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than Twelve Months, Fair Value	140	140	212
Less than Twelve Months, Gross Unrealized Losses	(7)	(7)	(1)
Twelve Months or Longer, Fair Value	118	118	204
Twelve Months or Longer, Gross Unrealized Losses	(8)	(8)	(13)
Total, Fair Value	258	258	416
Total, Gross Unrealized Losses	(15)	(15)	(14)
Temporarily impaired AFS debt securities | Mortgage-backed securities
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than Twelve Months, Fair Value	103,451	103,451	147,669
Less than Twelve Months, Gross Unrealized Losses	(762)	(762)	(2,165)
Twelve Months or Longer, Fair Value	21,558	21,558	5,002
Twelve Months or Longer, Gross Unrealized Losses	(652)	(652)	(156)
Total, Fair Value	125,009	125,009	152,671
Total, Gross Unrealized Losses	(1,414)	(1,414)	(2,321)
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	20,685	20,685	28,462
Less than Twelve Months, Gross Unrealized Losses	(144)	(144)	(752)
Twelve Months or Longer, Fair Value	17,035	17,035	0
Twelve Months or Longer, Gross Unrealized Losses	(482)	(482)	0
Total, Fair Value	37,720	37,720	28,462
Total, Gross Unrealized Losses	(626)	(626)	(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	774	774	52
Less than Twelve Months, Gross Unrealized Losses	(1)	(1)	(1)
Twelve Months or Longer, Fair Value	0	0	142
Twelve Months or Longer, Gross Unrealized Losses	0	0	(2)
Total, Fair Value	774	774	194
Total, Gross Unrealized Losses	(1)	(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	0	762
Less than Twelve Months, Gross Unrealized Losses	0	0	(5)
Twelve Months or Longer, Fair Value	384	384	1,438
Twelve Months or Longer, Gross Unrealized Losses	(3)	(3)	(18)
Total, Fair Value	384	384	2,200
Total, Gross Unrealized Losses	(3)	(3)	(23)
Temporarily impaired AFS debt securities | Total taxable securities
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than Twelve Months, Fair Value	124,910	124,910	176,945
Less than Twelve Months, Gross Unrealized Losses	(907)	(907)	(2,923)
Twelve Months or Longer, Fair Value	38,977	38,977	6,582
Twelve Months or Longer, Gross Unrealized Losses	(1,137)	(1,137)	(176)
Total, Fair Value	163,887	163,887	183,527
Total, Gross Unrealized Losses	(2,044)	(2,044)	(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	0	0	4,782
Less than Twelve Months, Gross Unrealized Losses	0	0	(148)
Twelve Months or Longer, Fair Value	2,682	2,682	1,873
Twelve Months or Longer, Gross Unrealized Losses	(92)	(92)	(36)
Total, Fair Value	2,682	2,682	6,655
Total, Gross Unrealized Losses	(92)	(92)	(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	27	27	94
Less than Twelve Months, Gross Unrealized Losses	(1)	(1)	(1)
Twelve Months or Longer, Fair Value	30	30	401
Twelve Months or Longer, Gross Unrealized Losses	(5)	(5)	(16)
Total, Fair Value	57	57	495
Total, Gross Unrealized Losses	$ (6)	$ (6)	$ (17)

Securities - Significant Assump

Securities - Significant Assumptions (Details) - Non-agency residential	Sep. 30, 2017
Weighted Average
Significant Assumptions:
Prepayment speed	12.00%
Loss severity	19.80%
Life default rate	21.00%
Weighted Average | Prime
Significant Assumptions:
Loss severity	17.50%
Life default rate	15.60%
Weighted Average | Alt-A
Significant Assumptions:
Loss severity	18.40%
Life default rate	21.70%
Weighted Average | Subprime
Significant Assumptions:
Loss severity	29.50%
Life default rate	22.10%
10th Percentile
Significant Assumptions:
Prepayment speed	3.00%
Loss severity	9.10%
Life default rate	1.20%
90th Percentile
Significant Assumptions:
Prepayment speed	20.60%
Loss severity	36.50%
Life default rate	77.70%

Securities - Maturities of Debt

Securities - Maturities of Debt Securities Carried at Fair Value and Held-to-maturity Debt Securities (Details) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Held-to-maturity Securities, Debt Maturities, Net Carrying Amount [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	$ 35
Due after One Year through Five Years, Yield	3.66%
Due after Five Years through Ten Years, Amount	$ 1,074
Due after Five Years though Ten Years, Yield	2.56%
Due after Ten Years, Amount	$ 121,236
Due after Ten Years, Yield	3.03%
Amortized Cost	$ 122,345	$ 117,071
Total, Yield	3.03%
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Debt securities carried at fair value	$ 316,864	313,660
Held-to-maturity Securities, Debt Maturities, Fair Value [Abstract]
Due in One Year or Less, Amount	0
Due after One Year through Five Years, Amount	27
Due after Five Years though Ten Years, Amount	896
Due after Ten Years, Amount	120,262
Held-to-maturity Securities, Fair Value	121,185	$ 115,285
Agency
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]
Due in One Year or Less, Amount	$ 6
Due in One Year or Less, Yield	4.67%
Due after One Year through Five Years, Amount	$ 25
Due after One Year through Five Years, Yield	3.38%
Due after Five Years though Ten Years, Amount	$ 593
Due after Five Years though Ten Years, Yield	2.56%
Due after Ten Years, Amount	$ 195,906
Due after Ten Years, Yield	3.23%
Total, Amount	$ 196,530
Total, Yield	3.23%
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Due in One Year or Less, Amount	$ 6
Due after One Year through Five Years, Amount	25
Due after Five Years though Ten Years, Amount	598
Due after Ten Years, Amount	195,565
Debt securities carried at fair value	196,194
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	$ 34
Due after Five Years though Ten Years, Yield	2.50%
Due after Ten Years, Amount	$ 6,991
Due after Ten Years, Yield	3.18%
Total, Amount	$ 7,025
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	33
Due after Ten Years, Amount	7,021
Debt securities carried at fair value	7,054
Commercial
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]
Due in One Year or Less, Amount	$ 48
Due in One Year or Less, Yield	8.11%
Due after One Year through Five Years, Amount	$ 847
Due after One Year through Five Years, Yield	2.06%
Due after Five Years though Ten Years, Amount	$ 11,183
Due after Five Years though Ten Years, Yield	2.44%
Due after Ten Years, Amount	$ 506
Due after Ten Years, Yield	2.70%
Total, Amount	$ 12,584
Total, Yield	2.45%
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Due in One Year or Less, Amount	$ 48
Due after One Year through Five Years, Amount	848
Due after Five Years though Ten Years, Amount	11,072
Due after Ten Years, Amount	496
Debt securities carried at fair value	12,464
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	$ 26
Due after Five Years though Ten Years, Yield	0.01%
Due after Ten Years, Amount	$ 5,106
Due after Ten Years, Yield	9.05%
Total, Amount	$ 5,132
Total, Yield	9.00%
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	35
Due after Ten Years, Amount	5,680
Debt securities carried at fair value	5,715
Mortgage-backed securities
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	7.73%
Due after One Year through Five Years, Amount	$ 872
Due after One Year through Five Years, Yield	2.10%
Due after Five Years though Ten Years, Amount	$ 11,836
Due after Five Years though Ten Years, Yield	2.44%
Due after Ten Years, Amount	$ 208,509
Due after Ten Years, Yield	3.37%
Total, Amount	$ 221,271
Total, Yield	3.32%
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	873
Due after Five Years though Ten Years, Amount	11,738
Due after Ten Years, Amount	208,762
Debt securities carried at fair value	221,427
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	$ 516
Due in One Year or Less, Yield	0.39%
Due after One Year through Five Years, Amount	$ 21,254
Due after One Year through Five Years, Yield	1.40%
Due after Five Years though Ten Years, Amount	$ 29,033
Due after Five Years though Ten Years, Yield	1.96%
Due after Ten Years, Amount	$ 21
Due after Ten Years, Yield	2.42%
Total, Amount	$ 50,824
Total, Yield	1.71%
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Due in One Year or Less, Amount	$ 516
Due after One Year through Five Years, Amount	20,992
Due after Five Years though Ten Years, Amount	28,739
Due after Ten Years, Amount	21
Debt securities carried at fair value	50,268
Non-U.S. securities
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]
Due in One Year or Less, Amount	$ 16,563
Due in One Year or Less, Yield	0.50%
Due after One Year through Five Years, Amount	$ 1,839
Due after One Year through Five Years, Yield	1.24%
Due after Five Years though Ten Years, Amount	$ 110
Due after Five Years though Ten Years, Yield	1.34%
Due after Ten Years, Amount	$ 177
Due after Ten Years, Yield	6.52%
Total, Amount	$ 18,689
Total, Yield	0.63%
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Due in One Year or Less, Amount	$ 16,563
Due after One Year through Five Years, Amount	1,844
Due after Five Years though Ten Years, Amount	111
Due after Ten Years, Amount	182
Debt securities carried at fair value	18,700
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	$ 1,747
Due in One Year or Less, Yield	2.28%
Due after One Year through Five Years, Amount	$ 2,865
Due after One Year through Five Years, Yield	2.59%
Due after Five Years though Ten Years, Amount	$ 1,418
Due after Five Years though Ten Years, Yield	2.95%
Due after Ten Years, Amount	$ 1,151
Due after Ten Years, Yield	3.28%
Total, Amount	$ 7,181
Total, Yield	2.70%
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Due in One Year or Less, Amount	$ 1,747
Due after One Year through Five Years, Amount	2,845
Due after Five Years though Ten Years, Amount	1,450
Due after Ten Years, Amount	1,235
Debt securities carried at fair value	7,277
Total taxable securities
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]
Due in One Year or Less, Amount	$ 18,880
Due in One Year or Less, Yield	0.68%
Due after One Year through Five Years, Amount	$ 26,830
Due after One Year through Five Years, Yield	1.54%
Due after Five Years though Ten Years, Amount	$ 42,397
Due after Five Years though Ten Years, Yield	2.13%
Due after Ten Years, Amount	$ 209,858
Due after Ten Years, Yield	3.37%
Total, Amount	$ 297,965
Total, Yield	2.86%
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Due in One Year or Less, Amount	$ 18,880
Due after One Year through Five Years, Amount	26,554
Due after Five Years though Ten Years, Amount	42,038
Due after Ten Years, Amount	210,200
Debt securities carried at fair value	297,672
Tax-exempt securities
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]
Due in One Year or Less, Amount	$ 1,175
Due in One Year or Less, Yield	1.46%
Due after One Year through Five Years, Amount	$ 6,428
Due after One Year through Five Years, Yield	1.77%
Due after Five Years though Ten Years, Amount	$ 9,155
Due after Five Years though Ten Years, Yield	1.66%
Due after Ten Years, Amount	$ 2,359
Due after Ten Years, Yield	2.03%
Total, Amount	$ 19,117
Total, Yield	1.73%
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Due in One Year or Less, Amount	$ 1,174
Due after One Year through Five Years, Amount	6,451
Due after Five Years though Ten Years, Amount	9,202
Due after Ten Years, Amount	2,365
Debt securities carried at fair value	19,192
Debt securities
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]
Due in One Year or Less, Amount	$ 20,055
Due in One Year or Less, Yield	0.73%
Due after One Year through Five Years, Amount	$ 33,258
Due after One Year through Five Years, Yield	1.58%
Due after Five Years though Ten Years, Amount	$ 51,552
Due after Five Years though Ten Years, Yield	2.04%
Due after Ten Years, Amount	$ 212,217
Due after Ten Years, Yield	3.36%
Total, Amount	$ 317,082
Total, Yield	2.79%
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Due in One Year or Less, Amount	$ 20,054
Due after One Year through Five Years, Amount	33,005
Due after Five Years though Ten Years, Amount	51,240
Due after Ten Years, Amount	212,565
Debt securities carried at fair value	$ 316,864

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 61

Outstanding Loans and Leases - Past Due (Details) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	$ 927,117	$ 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	$ 6,285	$ 7,085
Loans pledged to secure borrowings	152,900	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	6,500	6,400
Nonperforming Financing Receivable | Direct/Indirect Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonperforming loans	39	27
Estimate of Fair Value Measurement
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	$ 6,285	$ 7,085
Percentage of outstandings, total outstanding	0.68%	0.77%
Purchased Credit-impaired
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	$ 11,312
Loans and leases including disposal group		$ 13,738
Percentage of outstandings, total outstanding	1.22%	1.50%
Consumer Portfolio Segment
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	$ 448,593
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	615	710
Consumer Portfolio Segment | Home equity lines of credit
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases, measured at fair value	363	341
Consumer Portfolio Segment | Carrying Value
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	447,615	456,320
Consumer Portfolio Segment | Estimate of Fair Value Measurement
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	978	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	11,312	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	170,657	156,497
Consumer real estate | Core Portfolio, Home Equity Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	45,377	49,373
Consumer real estate | Non-core Portfolio, Residential Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	20,390	25,173
Consumer real estate | Non-core Portfolio, Residential Financing Receivable | Pay option
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	1,500	1,800
Consumer real estate | Non-core Portfolio, Home Equity Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	11,462	13,459
Consumer real estate | Fully Insured Loans | Core Portfolio, Residential Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	19,246	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	5,540	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	170,657	156,497
Consumer real estate | Carrying Value | Core Portfolio, Home Equity Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	45,377	49,373
Consumer real estate | Carrying Value | Non-core Portfolio, Residential Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	28,789	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	14,375	17,070
Consumer real estate | Purchased Credit-impaired | Non-core Portfolio, Residential Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	8,399	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	2,913	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	92,602	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	93,391	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	50,000	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	484	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	39,300	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	2,900	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	682	1,100
Credit card and other consumer | Other consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	2,424	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	2,300	1,900
Credit card and other consumer | Other consumer | Consumer Overdrafts
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	160	157
Credit card and other consumer | Carrying Value | Credit Card Receivable | United States
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	92,602	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	93,391	94,089
Credit card and other consumer | Carrying Value | Other consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	2,424	2,499
Commercial Portfolio Segment
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	478,524	458,526
Commercial Portfolio Segment | United States
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	282,677	270,372
Loans and leases, measured at fair value	2,800	2,900
Commercial Portfolio Segment | Non United States
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	95,896	89,397
Loans and leases, measured at fair value	2,500	3,100
Commercial Portfolio Segment | Commercial Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	59,628	57,355
Commercial Portfolio Segment | Commercial Real Estate | United States
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	55,500	54,300
Commercial Portfolio Segment | Commercial Real Estate | Non United States
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	4,200	3,100
Commercial Portfolio Segment | Commercial Lease Financing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	21,413	22,375
Commercial Portfolio Segment | Small Business Commercial | United States
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	13,603	12,993
Commercial Portfolio Segment | Carrying Value
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	473,217	452,492
Commercial Portfolio Segment | Carrying Value | United States
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	282,677	270,372
Commercial Portfolio Segment | Carrying Value | Non United States
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	95,896	89,397
Commercial Portfolio Segment | Carrying Value | Commercial Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	59,628	57,355
Commercial Portfolio Segment | Carrying Value | Commercial Lease Financing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	21,413	22,375
Commercial Portfolio Segment | Carrying Value | Small Business Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	13,603	12,993
Commercial Portfolio Segment | Estimate of Fair Value Measurement
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	5,307	6,034
30 to 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	$ 4,597
Loans and leases including disposal group		$ 5,567
Percentage of outstandings	0.50%	0.61%
30 to 59 Days Past Due | Consumer Portfolio Segment
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	$ 4,014	$ 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	1,583	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	246	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	1,144	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	269	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	905	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	282	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	492	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	273	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	7	26
30 to 59 Days Past Due | Commercial Portfolio Segment
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	583	1,583
30 to 59 Days Past Due | Commercial Portfolio Segment | United States
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	459	952
30 to 59 Days Past Due | Commercial Portfolio Segment | Non United States
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	9	348
30 to 59 Days Past Due | Commercial Portfolio Segment | Commercial Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	13	20
30 to 59 Days Past Due | Commercial Portfolio Segment | Commercial Lease Financing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	39	167
30 to 59 Days Past Due | Commercial Portfolio Segment | Small Business Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	63	96
60 to 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	$ 1,812
Loans and leases including disposal group		$ 2,142
Percentage of outstandings	0.19%	0.23%
60 to 89 Days Past Due | Consumer Portfolio Segment
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	$ 1,526	$ 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	306	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	111	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	540	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	131	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	443	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	201	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	355	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	82	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	1	8
60 to 89 Days Past Due | Commercial Portfolio Segment
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	286	347
60 to 89 Days Past Due | Commercial Portfolio Segment | United States
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	176	263
60 to 89 Days Past Due | Commercial Portfolio Segment | Non United States
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	14	4
60 to 89 Days Past Due | Commercial Portfolio Segment | Commercial Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	2	10
60 to 89 Days Past Due | Commercial Portfolio Segment | Commercial Lease Financing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	56	21
60 to 89 Days Past Due | Commercial Portfolio Segment | Small Business Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	38	49
90 Days or More Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	$ 7,131
Loans and leases including disposal group		$ 9,299
Percentage of outstandings	0.77%	1.02%
90 Days or More Past Due | Consumer Portfolio Segment
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	$ 6,606	$ 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	986	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	435	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	3,728	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	613	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	3,400	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	810	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	33	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	525	572
90 Days or More Past Due | Commercial Portfolio Segment | United States
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	349	400
90 Days or More Past Due | Commercial Portfolio Segment | Non United States
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	0	5
90 Days or More Past Due | Commercial Portfolio Segment | Commercial Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	51	56
90 Days or More Past Due | Commercial Portfolio Segment | Commercial Lease Financing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	45	27
90 Days or More Past Due | Commercial Portfolio Segment | Small Business Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	80	84
Total Past Due 30 Days or More
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	$ 13,540
Loans and leases including disposal group		$ 17,008
Percentage of outstandings	1.46%	1.86%
Total Past Due 30 Days or More | Consumer Portfolio Segment
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	$ 12,146	$ 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	2,875	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	792	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	5,412	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	1,013	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	1,657	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	388	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	9	40
Total Past Due 30 Days or More | Commercial Portfolio Segment
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	1,394	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	984	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	23	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	66	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	140	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	181	229
Total Current or Less Than 30 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	$ 895,980
Loans and leases including disposal group		$ 878,066
Percentage of outstandings, total outstanding	96.64%	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	$ 424,157	$ 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	167,782	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	44,585	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	14,978	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	10,449	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	90,945	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	93,003	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	2,415	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	471,823	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	281,693	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	95,873	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	59,562	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	21,273	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	$ 13,422	$ 12,764

Outstanding Loans and Leases 62

Outstanding Loans and Leases - Nonperforming (Details) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	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
Loans and leases	$ 927,117,000,000		$ 927,117,000,000		$ 906,683,000,000
Proceeds from sales			8,643,000,000	$ 14,870,000,000
Purchased credit impaired loans sold	538,000,000	$ 111,000,000	742,000,000	435,000,000
Recoveries of loans and leases previously charged off	462,000,000	389,000,000	1,280,000,000	1,210,000,000
Loans and leases charged off	1,362,000,000	1,277,000,000	4,022,000,000	4,151,000,000
Nonperforming loans and leases	6,570,000,000		6,570,000,000		7,707,000,000
Accruing past due 90 days or more, including loans and leases held for sale	4,402,000,000		4,402,000,000		5,887,000,000
Residential Mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing past due 90 days or more	1,100,000,000		1,100,000,000		1,800,000,000
Residential Mortgage | Federal Housing Administration
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonperforming loans and leases	2,300,000,000		2,300,000,000		3,000,000,000
90 Days or More Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	7,131,000,000		7,131,000,000
Consumer Portfolio Segment
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	448,593,000,000		448,593,000,000
Nonperforming loans and leases	5,252,000,000		5,252,000,000		6,004,000,000
Accruing past due 90 days or more, including loans and leases held for sale	4,214,000,000		4,214,000,000		5,679,000,000
Consumer Portfolio Segment | 90 Days or More Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	6,606,000,000		6,606,000,000		8,727,000,000
Consumer real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recoveries of loans and leases previously charged off	230,000,000	145,000,000	520,000,000	464,000,000
Loans and leases charged off	231,000,000	246,000,000	$ 633,000,000	928,000,000
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	170,657,000,000		$ 170,657,000,000		156,497,000,000
Nonperforming loans and leases	1,076,000,000		1,076,000,000		1,274,000,000
Accruing past due 90 days or more	396,000,000		396,000,000		486,000,000
Consumer real estate | Core Portfolio, Home Equity Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	45,377,000,000		45,377,000,000		49,373,000,000
Nonperforming loans and leases	1,046,000,000		1,046,000,000		969,000,000
Accruing past due 90 days or more	0		0		0
Consumer real estate | Non-core Portfolio, Residential Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	20,390,000,000		20,390,000,000		25,173,000,000
Nonperforming loans and leases	1,442,000,000		1,442,000,000		1,782,000,000
Accruing past due 90 days or more	2,976,000,000		2,976,000,000		4,307,000,000
Consumer real estate | Non-core Portfolio, Home Equity Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	11,462,000,000		11,462,000,000		13,459,000,000
Nonperforming loans and leases	1,645,000,000		1,645,000,000		1,949,000,000
Accruing past due 90 days or more	0		0		0
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	986,000,000		986,000,000		1,213,000,000
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	435,000,000		435,000,000		451,000,000
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	3,728,000,000		3,728,000,000		5,343,000,000
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	613,000,000		613,000,000		832,000,000
Credit card and other consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recoveries of loans and leases previously charged off	189,000,000	191,000,000	623,000,000	584,000,000
Loans and leases charged off	919,000,000	868,000,000	2,819,000,000	2,664,000,000
Credit card and other consumer | Credit Card Receivable | United States
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	92,602,000,000		92,602,000,000		92,278,000,000
Accruing past due 90 days or more	810,000,000		810,000,000		782,000,000
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		0		66,000,000
Credit card and other consumer | Direct/Indirect Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	93,391,000,000		93,391,000,000		94,089,000,000
Nonperforming loans and leases	43,000,000		43,000,000		28,000,000
Accruing past due 90 days or more	31,000,000		31,000,000		34,000,000
Credit card and other consumer | Other consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	2,424,000,000		2,424,000,000		2,499,000,000
Nonperforming loans and leases	0		0		2,000,000
Accruing past due 90 days or more	1,000,000		1,000,000		4,000,000
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	810,000,000		810,000,000		782,000,000
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	33,000,000		33,000,000		34,000,000
Credit card and other consumer | 90 Days or More Past Due | Other consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	1,000,000		$ 1,000,000		6,000,000
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	478,524,000,000		$ 478,524,000,000		458,526,000,000
Recoveries of loans and leases previously charged off	43,000,000	53,000,000	137,000,000	162,000,000
Loans and leases charged off	212,000,000	163,000,000	570,000,000	559,000,000
Nonperforming loans and leases	1,318,000,000		1,318,000,000		1,703,000,000
Accruing past due 90 days or more	188,000,000		188,000,000		208,000,000
Commercial Portfolio Segment | United States
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	282,677,000,000		282,677,000,000		270,372,000,000
Nonperforming loans and leases	863,000,000		863,000,000		1,256,000,000
Accruing past due 90 days or more	82,000,000		82,000,000		106,000,000
Commercial Portfolio Segment | Non United States
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	95,896,000,000		95,896,000,000		89,397,000,000
Nonperforming loans and leases	244,000,000		244,000,000		279,000,000
Accruing past due 90 days or more	0		0		5,000,000
Commercial Portfolio Segment | Commercial Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	59,628,000,000		59,628,000,000		57,355,000,000
Nonperforming loans and leases	130,000,000		130,000,000		72,000,000
Accruing past due 90 days or more	0		0		7,000,000
Commercial Portfolio Segment | Commercial Real Estate | United States
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	55,500,000,000		55,500,000,000		54,300,000,000
Commercial Portfolio Segment | Commercial Real Estate | Non United States
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	4,200,000,000		4,200,000,000		3,100,000,000
Commercial Portfolio Segment | Commercial Lease Financing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	21,413,000,000		21,413,000,000		22,375,000,000
Nonperforming loans and leases	26,000,000		26,000,000		36,000,000
Accruing past due 90 days or more	38,000,000		38,000,000		19,000,000
Commercial Portfolio Segment | Small Business Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonperforming loans and leases	55,000,000		55,000,000		60,000,000
Accruing past due 90 days or more	68,000,000		68,000,000		71,000,000
Commercial Portfolio Segment | Small Business Commercial | United States
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	13,603,000,000		13,603,000,000		12,993,000,000
Commercial Portfolio Segment | 90 Days or More Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	525,000,000		525,000,000		572,000,000
Commercial Portfolio Segment | 90 Days or More Past Due | United States
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	349,000,000		349,000,000		400,000,000
Commercial Portfolio Segment | 90 Days or More Past Due | Non United States
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	0		0		5,000,000
Commercial Portfolio Segment | 90 Days or More Past Due | Commercial Real Estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	51,000,000		51,000,000		56,000,000
Commercial Portfolio Segment | 90 Days or More Past Due | Commercial Lease Financing
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	45,000,000		45,000,000		27,000,000
Commercial Portfolio Segment | 90 Days or More Past Due | Small Business Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	80,000,000		80,000,000		84,000,000
Nonperforming Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Transfer of nonperforming loans to held-for-sale			198,000,000	0
Nonperforming Financing Receivable | Junior Lien Home Equity Financing Receivable
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	336,000,000		$ 336,000,000		$ 428,000,000
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	$ 224,000,000		$ 224,000,000
Nonperforming loans discharged more than twelve months prior (greater than)	78.00%		78.00%
Nonperforming loans discharged more than twenty four months prior (greater than)	68.00%		68.00%
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	$ 127,000,000		$ 127,000,000
Nonperforming Financing Receivable | Consumer Portfolio Segment
Financing Receivable, Recorded Investment, Past Due [Line Items]
Proceeds from sales	700,000,000	360,000,000	1,200,000,000	1,800,000,000
Purchased credit impaired loans sold	538,000,000	111,000,000	742,000,000	435,000,000
Recoveries of loans and leases previously charged off	88,000,000	6,000,000	102,000,000
Loans and leases charged off				39,000,000
Gain (loss) on the sale of loans and leases receivable	38,000,000	$ 19,000,000	50,000,000	$ 63,000,000
Nonperforming Financing Receivable | Consumer real estate | Chapter Seven Bankruptcy
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans and leases	$ 379,000,000		$ 379,000,000

Outstanding Loans and Leases 63

Outstanding Loans and Leases - Consumer Real Estate - Credit Quality Indicators (Details) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	$ 927,117	$ 906,683
Estimate of Fair Value Measurement
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	6,285	7,085
Consumer real estate | Core Portfolio Residential Mortgage
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	170,657	156,497
Consumer real estate | Non-core Residential Mortgage
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	20,390	25,173
Consumer real estate | Non-core Residential Mortgage | Pay option
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	1,500	1,800
Consumer real estate | Residential Mortgage PCI
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	8,399	10,127
Consumer real estate | Residential Mortgage PCI | Pay option
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	1,300	1,600
Consumer real estate | Core Portfolio Home Equity
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	45,377	49,373
Consumer real estate | Non-core Home Equity
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	11,462	13,459
Consumer real estate | Home Equity PCI
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	2,913	3,611
Consumer real estate | Less than 620 | Core Portfolio Residential Mortgage
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	2,285	2,479
Consumer real estate | Less than 620 | Non-core Residential Mortgage
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	2,560	3,198
Consumer real estate | Less than 620 | Residential Mortgage PCI
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	2,102	2,741
Consumer real estate | Less than 620 | Core Portfolio Home Equity
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	1,192	1,254
Consumer real estate | Less than 620 | Non-core Home Equity
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	2,268	2,692
Consumer real estate | Less than 620 | Home Equity PCI
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	470	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	4,652	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	2,260	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	1,740	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	2,416	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	2,506	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	495	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	22,153	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	3,720	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	2,446	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	8,484	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	2,860	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	862	1,069
Consumer real estate | Greater than or equal to 740 | Core Portfolio Residential Mortgage
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	122,321	105,041
Consumer real estate | Greater than or equal to 740 | Non-core Residential Mortgage
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	6,310	7,181
Consumer real estate | Greater than or equal to 740 | Residential Mortgage PCI
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	2,111	2,229
Consumer real estate | Greater than or equal to 740 | Core Portfolio Home Equity
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	33,285	35,197
Consumer real estate | Greater than or equal to 740 | Non-core Home Equity
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	3,828	4,497
Consumer real estate | Greater than or equal to 740 | Home Equity PCI
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	1,086	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	146,679	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	12,603	14,280
Consumer real estate | Less than or equal to 90 percent | Residential Mortgage PCI
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	7,095	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	43,942	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	8,128	8,480
Consumer real estate | Less than or equal to 90 percent | Home Equity PCI
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	1,881	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	3,288	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	1,016	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	624	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	660	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	1,211	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	420	630
Consumer real estate | Greater than 100 percent | Core Portfolio Residential Mortgage
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	1,444	1,872
Consumer real estate | Greater than 100 percent | Non-core Residential Mortgage
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	1,231	1,972
Consumer real estate | Greater than 100 percent | Residential Mortgage PCI
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	680	1,295
Consumer real estate | Greater than 100 percent | Core Portfolio Home Equity
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	775	1,196
Consumer real estate | Greater than 100 percent | Non-core Home Equity
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	2,123	3,311
Consumer real estate | Greater than 100 percent | Home Equity PCI
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	612	1,039
Consumer real estate | Fully Insured Loans | Core Portfolio Residential Mortgage
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	19,246	21,254
Consumer real estate | Fully Insured Loans | Non-core Residential Mortgage
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	5,540	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 64

Outstanding Loans and Leases - Credit Card and Other Consumer - Credit Quality Indicators (Details) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	$ 927,117	$ 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	92,602	92,278
Credit card and other consumer | Credit Card Receivable | United States | Less than 620
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	4,612	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	12,195	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	34,796	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	40,999	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	93,391	94,089
Securities based lending overcollateralized	42,200	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	1,578	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	2,003	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	12,161	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	34,731	33,420
Credit card and other consumer | Direct/Indirect Consumer | Other internal credit metrics
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	42,918	44,630
Credit card and other consumer | Other consumer
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	2,424	$ 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	42	$ 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	125	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	364	404
Credit card and other consumer | Other consumer | Greater than or equal to 740
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	1,730	1,525
Credit card and other consumer | Other consumer | Other internal credit metrics
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	$ 163	$ 161

Outstanding Loans and Leases 65

Outstanding Loans and Leases - Commercial - Credit Quality Indicators (Details) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	$ 927,117	$ 906,683
Estimate of Fair Value Measurement
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	6,285	7,085
Commercial Portfolio Segment
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	478,524	458,526
Commercial Portfolio Segment | Estimate of Fair Value Measurement
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	5,307	6,034
Commercial Portfolio Segment | Commercial Real Estate
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	59,628	57,355
Commercial Portfolio Segment | Commercial Lease Financing
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	21,413	22,375
Commercial Portfolio Segment | Pass rated | Commercial Real Estate
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	59,001	56,957
Commercial Portfolio Segment | Pass rated | Commercial Lease Financing
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	20,763	21,565
Commercial Portfolio Segment | Reservable criticized | Commercial Real Estate
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	627	398
Commercial Portfolio Segment | Reservable criticized | Commercial Lease Financing
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	650	810
Commercial Portfolio Segment | United States
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	282,677	270,372
Commercial Portfolio Segment | United States | Commercial Real Estate
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	55,500	54,300
Commercial Portfolio Segment | United States | Small Business Commercial
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	13,603	12,993
Commercial Portfolio Segment | United States | Pass rated
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	273,670	261,214
Commercial Portfolio Segment | United States | Pass rated | Small Business Commercial
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	354	453
Commercial Portfolio Segment | United States | Reservable criticized
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	9,007	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	$ 825	$ 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	99.00%	98.00%
Commercial Portfolio Segment | United States | Less than 620 | Small Business Commercial
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	$ 224	$ 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	615	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	1,842	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	3,683	3,264
Commercial Portfolio Segment | United States | Other internal credit metrics | Small Business Commercial
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	6,835	6,673
Commercial Portfolio Segment | Non United States
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	95,896	89,397
Commercial Portfolio Segment | Non United States | Commercial Real Estate
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	4,200	3,100
Commercial Portfolio Segment | Non United States | Pass rated
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	93,498	85,689
Commercial Portfolio Segment | Non United States | Reservable criticized
Financing Receivable, Recorded Investment [Line Items]
Loans and leases	$ 2,398	$ 3,708

Outstanding Loans and Leases 66

Outstanding Loans and Leases - Consumer Real Estate - Impaired Loans (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Financing Receivable, Impaired [Line Items]
Loans and leases	$ 927,117		$ 927,117		$ 906,683
Consumer real estate
Financing Receivable, Impaired [Line Items]
Real estate acquired through foreclosure	259		259		363
Loans with formal foreclosure proceeding in process	3,700		3,700
Reclassified consumer real estate loans	198	$ 326	624	$ 1,100
Consumer real estate | Residential Mortgage
Unpaid Principal Balance
With no recorded allowance	9,212		9,212		11,151
With an allowance recorded	3,167		3,167		4,041
Total	12,379		12,379		15,192
Carrying Value
With no recorded allowance	7,172		7,172		8,695
With an allowance recorded	3,079		3,079		3,936
Total	10,251		10,251		12,631
Related Allowance	188		188		219
Average Carrying Value
With no recorded allowance	7,498	9,673	7,964	10,523
With an allowance recorded	3,254	4,676	3,565	5,371
Total	10,752	14,349	11,529	15,894
Interest Income Recognized
With no recorded allowance	77	83	237	277
With an allowance recorded	29	36	97	133
Total	106	119	334	410
Consumer real estate | Home equity lines of credit
Unpaid Principal Balance
With no recorded allowance	3,644		3,644		3,704
With an allowance recorded	990		990		910
Total	4,634		4,634		4,614
Carrying Value
With no recorded allowance	1,962		1,962		1,953
With an allowance recorded	909		909		824
Total	2,871		2,871		2,777
Related Allowance	181		181		$ 137
Average Carrying Value
With no recorded allowance	2,000	1,964	2,001	1,883
With an allowance recorded	873	822	850	863
Total	2,873	2,786	2,851	2,746
Interest Income Recognized
With no recorded allowance	27	37	82	67
With an allowance recorded	6	7	18	18
Total	33	$ 44	100	$ 85
Consumer real estate | Chapter Seven Bankruptcy | Home equity lines of credit
Financing Receivable, Impaired [Line Items]
Loans and leases	1,200		1,200
Consumer real estate | Chapter Seven Bankruptcy | Nonperforming Financing Receivable
Financing Receivable, Impaired [Line Items]
Loans and leases	379		379
Consumer real estate | Chapter Seven Bankruptcy | Fully Insured Loans | Federal Housing Administration | Home equity lines of credit
Financing Receivable, Impaired [Line Items]
Loans and leases	$ 442		$ 442

Outstanding Loans and Leases 67

Outstanding Loans and Leases - Consumer Real Estate - TDRs Entered into During the Period (Details) - Consumer real estate - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Financing Receivable, Modifications [Line Items]
Unpaid Principal Balance	$ 506,000,000	$ 779,000,000	$ 1,368,000,000	$ 1,757,000,000
Carrying Value	$ 435,000,000	$ 668,000,000	$ 1,148,000,000	$ 1,494,000,000
Pre-Mod Interest Rate	4.25%	4.87%	4.33%	4.47%
Post-Mod Interest Rate	4.17%	4.10%	3.90%	3.71%
Net Charge-offs	$ 17,000,000	$ 21,000,000	$ 37,000,000	$ 52,000,000
Residential Mortgage
Financing Receivable, Modifications [Line Items]
Unpaid Principal Balance	294,000,000	487,000,000	738,000,000	1,039,000,000
Carrying Value	$ 263,000,000	$ 445,000,000	$ 657,000,000	$ 942,000,000
Pre-Mod Interest Rate	4.42%	4.83%	4.49%	4.77%
Post-Mod Interest Rate	4.33%	4.51%	4.25%	4.29%
Net Charge-offs	$ 2,000,000	$ 4,000,000	$ 5,000,000	$ 9,000,000
Principal forgiveness		1,000,000	0	12,000,000
Home equity lines of credit
Financing Receivable, Modifications [Line Items]
Unpaid Principal Balance	212,000,000	292,000,000	630,000,000	718,000,000
Carrying Value	$ 172,000,000	$ 223,000,000	$ 491,000,000	$ 552,000,000
Pre-Mod Interest Rate	4.01%	4.95%	4.16%	4.03%
Post-Mod Interest Rate	3.96%	3.41%	3.52%	2.87%
Net Charge-offs	$ 15,000,000	$ 17,000,000	$ 32,000,000	$ 43,000,000

Outstanding Loans and Leases 68

Outstanding Loans and Leases - Consumer Real Estate - Modification Programs (Details) - Consumer real estate - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Financing Receivable, Modifications [Line Items]
Carrying value	$ 435	$ 668	$ 1,148	$ 1,494
Modifications under government programs
Financing Receivable, Modifications [Line Items]
Carrying value	18	23	82	153
Modifications under proprietary programs
Financing Receivable, Modifications [Line Items]
Carrying value	30	71	298	289
Trial modifications
Financing Receivable, Modifications [Line Items]
Carrying value	329	490	605	853
Loans discharged in Chapter 7 bankruptcy
Financing Receivable, Modifications [Line Items]
Carrying value	58	84	163	199
Contractual interest rate reduction | Modifications under government programs
Financing Receivable, Modifications [Line Items]
Carrying value	10	18	56	121
Contractual interest rate reduction | Modifications under proprietary programs
Financing Receivable, Modifications [Line Items]
Carrying value	15	20	178	143
Capitalization of past due amounts | Modifications under proprietary programs
Financing Receivable, Modifications [Line Items]
Carrying value	12	4	47	27
Principal and/or interest forbearance | Modifications under government programs
Financing Receivable, Modifications [Line Items]
Carrying value	1	2	4	11
Principal and/or interest forbearance | Modifications under proprietary programs
Financing Receivable, Modifications [Line Items]
Carrying value	2	2	28	47
Other modifications | Modifications under government programs
Financing Receivable, Modifications [Line Items]
Carrying value	7	3	22	21
Other modifications | Modifications under proprietary programs
Financing Receivable, Modifications [Line Items]
Carrying value	$ 1	$ 45	$ 45	$ 72

Outstanding Loans and Leases 69

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	3 Months Ended		9 Months Ended
	Sep. 30, 2017USD ($)	Sep. 30, 2016USD ($)	Sep. 30, 2017USD ($)payment	Sep. 30, 2016USD ($)
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	$ 118	$ 294	$ 566	$ 1,147
Modifications under government programs
Financing Receivable, Modifications [Line Items]
Trouble debt restructurings entered payment default that were modified during the preceding twelve months	16	51	62	230
Modifications under proprietary programs
Financing Receivable, Modifications [Line Items]
Trouble debt restructurings entered payment default that were modified during the preceding twelve months	32	40	99	145
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	16	42	93	124
Trial modifications
Financing Receivable, Modifications [Line Items]
Trouble debt restructurings entered payment default that were modified during the preceding twelve months	$ 54	$ 161	$ 312	$ 648

Outstanding Loans and Leases 70

Outstanding Loans and Leases - Credit Card and Other Consumer (Details) - Credit card and other consumer - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Financing Receivable, Impaired [Line Items]
Fixed payment plan period for loans modified			60 months
Direct/Indirect Consumer
Unpaid Principal Balance
With no recorded allowance	$ 53		$ 53		$ 49
With an allowance recorded	1		1		3
Total	54		54		52
Carrying Value
With no recorded allowance	25		25		22
With an allowance recorded	2		2		3
Total	27		27		25
Related Allowance	0		0		0
Average Carrying Value
With no recorded allowance	20	$ 21	19	$ 21
With an allowance recorded	2	7	2	12
Total	22	28	21	33
Interest Income Recognized
With no recorded allowance	0	0	0	0
With an allowance recorded	0	0	0	0
Total	0	0	0	0
United States | Credit Card Receivable
Unpaid Principal Balance
With an allowance recorded	452		452		479
Total	452		452		479
Carrying Value
With an allowance recorded	458		458		485
Total	458		458		485
Related Allowance	125		125		128
Average Carrying Value
With an allowance recorded	457	539	466	571
Total	457	539	466	571
Interest Income Recognized
With an allowance recorded	6	7	18	24
Total	6	7	18	24
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		107		115
With an allowance recorded, including loans held for sale	0		62
Total, including loans held for sale	0		62
Total		107		115
Interest Income Recognized
With an allowance recorded		0		2
With an allowance recorded, including loans held for sale	0		1
Total, including loans held for sale	$ 0		$ 1
Total		$ 0		$ 2

Outstanding Loans and Leases 71

Outstanding Loans and Leases - Credit Card and Other Consumer - TDRs by Program Type (Details) - Credit card and other consumer - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Financing Receivable, Modifications [Line Items]
Renegotiated TDRs	$ 485	$ 610
Percent of balances current or less than 30 days past due	88.34%	80.79%
Internal Programs
Financing Receivable, Modifications [Line Items]
Renegotiated TDRs	$ 202	$ 233
External Programs
Financing Receivable, Modifications [Line Items]
Renegotiated TDRs	257	272
Other
Financing Receivable, Modifications [Line Items]
Renegotiated TDRs	26	105
Credit Card Receivable | United States
Financing Receivable, Modifications [Line Items]
Renegotiated TDRs	$ 458	$ 485
Percent of balances current or less than 30 days past due	88.30%	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	$ 201	$ 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	256	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	$ 27	$ 25
Percent of balances current or less than 30 days past due	89.05%	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	1	1
Direct/Indirect Consumer | Other
Financing Receivable, Modifications [Line Items]
Renegotiated TDRs	$ 25	$ 22

Outstanding Loans and Leases 72

Outstanding Loans and Leases - Credit Card and Other Consumer - TDRs Entered into During the Period (Details) - Credit card and other consumer - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Financing Receivable, Modifications [Line Items]
Unpaid Principal Balance	$ 82	$ 85	$ 181	$ 205
Carrying Value	$ 78	$ 90	$ 179	$ 216
Pre-Mod Interest Rate	15.64%	19.55%	16.57%	19.05%
Post-Mod Interest Rate	5.25%	3.27%	5.37%	3.72%
Net Charge-offs	$ 14	$ 26	$ 33	$ 43
Direct/Indirect Consumer
Financing Receivable, Modifications [Line Items]
Unpaid Principal Balance	22	7	29	16
Carrying Value	$ 14	$ 4	$ 18	$ 9
Pre-Mod Interest Rate	4.92%	4.13%	4.99%	4.50%
Post-Mod Interest Rate	4.53%	4.08%	4.37%	4.33%
United States | Credit Card Receivable
Financing Receivable, Modifications [Line Items]
Unpaid Principal Balance	$ 60	$ 46	$ 152	$ 126
Carrying Value	$ 64	$ 50	$ 161	$ 134
Pre-Mod Interest Rate	17.96%	17.48%	17.88%	17.42%
Post-Mod Interest Rate	5.40%	5.33%	5.49%	5.45%
Non United States | Credit Card Receivable
Financing Receivable, Modifications [Line Items]
Unpaid Principal Balance		$ 32		$ 63
Carrying Value		$ 36		$ 73
Pre-Mod Interest Rate		24.11%		23.93%
Post-Mod Interest Rate		0.38%		0.44%

Outstanding Loans and Leases 73

Outstanding Loans and Leases - Credit Card and Other Consumer - TDRs Entered into During the Period, Narrative (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017USD ($)	Sep. 30, 2016USD ($)	Sep. 30, 2017USD ($)payment	Sep. 30, 2016USD ($)
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	$ 7	$ 7	$ 19	$ 23
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		31		95
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			13.00%
Trouble debt restructurings entered payment default that were modified during the preceding twelve months	$ 1	$ 0	$ 3	$ 2

Outstanding Loans and Leases 74

Outstanding Loans and Leases - Commercial Loans - Impaired Loans (Details) - Commercial Portfolio Segment - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Financing Receivable, Impaired [Line Items]
Lending commitments	$ 279		$ 279		$ 461
Real estate acquired through foreclosure	40		40		14
United States
Unpaid Principal Balance
With no recorded allowance	683		683		860
With an allowance recorded	1,466		1,466		2,018
Total	2,149		2,149		2,878
Carrying Value
With no recorded allowance	675		675		827
With an allowance recorded	1,132		1,132		1,569
Total	1,807		1,807		2,396
Related Allowance	123		123		132
Average Carrying Value
With no recorded allowance	726	$ 940	822	$ 726
With an allowance recorded	1,166	1,624	1,305	1,570
Total	1,892	2,564	2,127	2,296
Interest Income Recognized
With no recorded allowance	3	5	9	10
With an allowance recorded	9	16	25	46
Total	12	21	34	56
Non United States
Unpaid Principal Balance
With no recorded allowance	44		44		130
With an allowance recorded	497		497		545
Total	541		541		675
Carrying Value
With no recorded allowance	27		27		130
With an allowance recorded	437		437		432
Total	464		464		562
Related Allowance	67		67		104
Average Carrying Value
With no recorded allowance	14	32	55	18
With an allowance recorded	463	397	466	372
Total	477	429	521	390
Interest Income Recognized
With no recorded allowance	0	0	0	0
With an allowance recorded	3	5	9	11
Total	3	5	9	11
Commercial Real Estate
Unpaid Principal Balance
With no recorded allowance	117		117		77
With an allowance recorded	151		151		243
Total	268		268		320
Carrying Value
With no recorded allowance	106		106		71
With an allowance recorded	39		39		96
Total	145		145		167
Related Allowance	13		13		10
Average Carrying Value
With no recorded allowance	77	59	61	67
With an allowance recorded	72	87	85	95
Total	149	146	146	162
Interest Income Recognized
With no recorded allowance	1	0	1	0
With an allowance recorded	0	1	2	3
Total	1	1	3	3
Commercial lease financing
Unpaid Principal Balance
With an allowance recorded	13		13		6
Total	13		13		6
Carrying Value
With an allowance recorded	12		12		4
Total	12		12		4
Related Allowance	2		2		0
Average Carrying Value
With an allowance recorded	10	4	6	2
Total	10	4	6	2
Interest Income Recognized
With an allowance recorded		0	0	0
Total	0	0	0	0
Small Business Commercial
Unpaid Principal Balance
With an allowance recorded	82		82		85
Total	82		82		85
Carrying Value
With an allowance recorded	70		70		73
Total	70		70		73
Related Allowance	27		27		$ 27
Average Carrying Value
With an allowance recorded	72	81	74	91
Total	72	81	74	91
Interest Income Recognized
With an allowance recorded	0	1	0	1
Total	$ 0	$ 1	$ 0	$ 1

Outstanding Loans and Leases 75

Outstanding Loans and Leases - Commercial - TDRs Entered Into During the Period (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
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	$ 477	$ 817	$ 907	$ 1,770
Carrying Value	442	792	838	1,667
Net charge-offs	27	14	$ 89	94
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	0	4	$ 16	11
Carrying Value	0	4	9	11
Trouble debt restructurings entered payment default that were modified during the preceding twelve months			32	17
Commercial Portfolio Segment | Commercial lease financing
Financing Receivable, Modifications [Line Items]
Unpaid Principal Balance	12	2	12	7
Carrying Value	12	2	12	4
Commercial Portfolio Segment | Small Business Commercial
Financing Receivable, Modifications [Line Items]
Unpaid Principal Balance	3	1	11	4
Carrying Value	3	1	12	4
Trouble debt restructurings entered payment default that were modified during the preceding twelve months			0	2
Commercial Portfolio Segment | United States
Financing Receivable, Modifications [Line Items]
Unpaid Principal Balance	357	793	763	1,483
Carrying Value	322	768	700	1,447
Trouble debt restructurings entered payment default that were modified during the preceding twelve months			57	123
Commercial Portfolio Segment | Non United States
Financing Receivable, Modifications [Line Items]
Unpaid Principal Balance	105	17	105	265
Carrying Value	$ 105	$ 17	$ 105	$ 201

Outstanding Loans and Leases 76

Outstanding Loans and Leases - Rollforward of Accretable Yield (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Rollforward of Accretable Yield
Accretable yield, beginning of period	$ 3,288		$ 3,805
Accretion	(147)		(465)
Disposals/transfers	(282)		(521)
Reclassifications from nonaccretable difference	80		120
Accretable yield, end of period	2,939		2,939
Purchased credit impaired loans sold	538	$ 111	742	$ 435
Purchased Credit-impaired
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing receivable allowance sold	$ 45	$ 11	$ 80	$ 50

Outstanding Loans and Leases 77

Outstanding Loans and Leases - Loans Held-for-Sale (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Receivables [Abstract]
Loans held-for-sale	$ 13,243		$ 9,066
Proceeds including cash and securities from sales securitizations and paydowns of loans held for sale	28,000	$ 22,100
Originations and purchases	$ 31,404	$ 24,154

Allowance for Credit Losses - A

Allowance for Credit Losses - Allowance by Portfolio Segment (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Allowance for Loan and Lease Losses [Roll Forward]
Allowance for loan and lease losses, beginning of the period	$ 10,875	$ 11,837	$ 11,237	$ 12,234
Loans and leases charged off	(1,362)	(1,277)	(4,022)	(4,151)
Recoveries of loans and leases previously charged off	462	389	1,280	1,210
Net charge-offs	(900)	(888)	(2,742)	(2,941)
Provision for loan and lease losses	829	834	2,395	2,802
Other	(38)	(8)	(36)	(133)
Allowance for loan and lease losses, end of the period	10,693	11,692	10,693	11,692
Provision for unfunded lending commitments	834	850	2,395	2,823
Reserve for unfunded lending commitments, end of the period	11,455	12,459	11,455	12,459
Allowance for credit losses	11,455	12,459	11,455	12,459
Unfunded loan commitments
Allowance for Loan and Lease Losses [Roll Forward]
Other		1		100
Reserve for unfunded lending commitments, beginning of the period	757	750	762	646
Provision for unfunded lending commitments	5	16	0	21
Reserve for unfunded lending commitments, end of the period	762	767	762	767
Allowance for credit losses	757	750	762	646
Purchased Credit-impaired
Allowance for Loan and Lease Losses [Roll Forward]
Loans and leases charged off	(73)	(83)	(161)	(270)
Provision for loan and lease losses	12	8	56	(81)
Reserve for unfunded lending commitments, beginning of the period			419
Reserve for unfunded lending commitments, end of the period	315		315
Allowance for credit losses	315		419
Financing receivable allowance sold	45	11	80	50
Consumer Real Estate
Allowance for Loan and Lease Losses [Roll Forward]
Allowance for loan and lease losses, beginning of the period	2,309	3,209	2,750	3,914
Loans and leases charged off	(231)	(246)	(633)	(928)
Recoveries of loans and leases previously charged off	230	145	520	464
Net charge-offs	(1)	(101)	(113)	(464)
Provision for loan and lease losses	(204)	(36)	(445)	(191)
Other	1	0	1	0
Allowance for loan and lease losses, end of the period	2,032	2,989	2,032	2,989
Reserve for unfunded lending commitments, end of the period	2,032	2,989	2,032	2,989
Allowance for credit losses	2,032	2,989	2,032	2,989
Consumer Real Estate | Unfunded loan commitments
Allowance for Loan and Lease Losses [Roll Forward]
Other		0		0
Reserve for unfunded lending commitments, beginning of the period	0	0	0	0
Provision for unfunded lending commitments	0	0	0	0
Reserve for unfunded lending commitments, end of the period	0	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	(73)	(83)	(161)	(270)
Reserve for unfunded lending commitments, beginning of the period			419
Reserve for unfunded lending commitments, end of the period	315		315
Allowance for credit losses	315		419
Credit card and other consumer
Allowance for Loan and Lease Losses [Roll Forward]
Allowance for loan and lease losses, beginning of the period	3,386	3,334	3,229	3,471
Loans and leases charged off	(919)	(868)	(2,819)	(2,664)
Recoveries of loans and leases previously charged off	189	191	623	584
Net charge-offs	(730)	(677)	(2,196)	(2,080)
Provision for loan and lease losses	934	741	2,553	2,031
Other	(40)	(8)	(36)	(32)
Allowance for loan and lease losses, end of the period	3,550	3,390	3,550	3,390
Reserve for unfunded lending commitments, end of the period	3,550	3,390	3,550	3,390
Allowance for credit losses	3,550	3,390	3,550	3,390
Credit card and other consumer | Unfunded loan commitments
Allowance for Loan and Lease Losses [Roll Forward]
Other		0		0
Reserve for unfunded lending commitments, beginning of the period	0	0	0	0
Provision for unfunded lending commitments	0	0	0	0
Reserve for unfunded lending commitments, end of the period	0	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	0
Commercial
Allowance for Loan and Lease Losses [Roll Forward]
Allowance for loan and lease losses, beginning of the period	5,180	5,294	5,258	4,849
Loans and leases charged off	(212)	(163)	(570)	(559)
Recoveries of loans and leases previously charged off	43	53	137	162
Net charge-offs	(169)	(110)	(433)	(397)
Provision for loan and lease losses	99	129	287	962
Other	1	0	(1)	(101)
Allowance for loan and lease losses, end of the period	5,111	5,313	5,111	5,313
Reserve for unfunded lending commitments, end of the period	5,873	6,080	5,873	6,080
Allowance for credit losses	5,873	6,080	5,873	6,080
Commercial | Unfunded loan commitments
Allowance for Loan and Lease Losses [Roll Forward]
Other		1		100
Reserve for unfunded lending commitments, beginning of the period	757	750	762	646
Provision for unfunded lending commitments	5	16	0	21
Reserve for unfunded lending commitments, end of the period	762	767	762	767
Allowance for credit losses	757	750	762	646
Commercial | Purchased Credit-impaired
Allowance for Loan and Lease Losses [Roll Forward]
Loans and leases charged off	$ 0	$ 0	$ 0	$ 0

Allowance for Credit Losses -79

Allowance for Credit Losses - Allowance and Carrying Value by Portfolio Segment (Details) - USD ($) $ in Millions	Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Dec. 31, 2015
Impaired loans and troubled debt restructurings
Allowance for loan and lease losses	$ 726		$ 818
Carrying value	$ 16,105		$ 19,220
Allowance as a percentage of carrying value	4.51%		4.26%
Loans collectively evaluated for impairment
Allowance for loan and lease losses	$ 9,652		$ 10,243
Carrying value	$ 893,415		$ 875,854
Allowance as a percentage of carrying value	1.08%		1.17%
Purchased credit-impaired loans
Valuation allowance	$ 11,455			$ 12,459
Valuation allowance as a percentage of carrying value	2.78%		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	$ 10,693	$ 10,875	11,237	11,692	$ 11,837	$ 12,234
Carrying value	$ 920,832		$ 899,598
Allowance as a percentage of carrying value	1.16%		1.25%
Loans and leases	$ 927,117		$ 906,683
Estimate of Fair Value Measurement
Total
Loans and leases	6,285		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	315		419
Carrying value gross of valuation allowance	11,312		13,738
Total
Loans and leases	11,312
Consumer real estate
Impaired loans and troubled debt restructurings
Allowance for loan and lease losses	369		356
Carrying value	$ 13,122		$ 15,408
Allowance as a percentage of carrying value	2.81%		2.31%
Loans collectively evaluated for impairment
Allowance for loan and lease losses	$ 1,348		$ 1,975
Carrying value	$ 234,764		$ 229,094
Allowance as a percentage of carrying value	0.57%		0.86%
Purchased credit-impaired loans
Valuation allowance	$ 2,032			2,989
Valuation allowance as a percentage of carrying value	2.78%		3.05%
Total
Allowance for loan and lease losses	$ 2,032	2,309	$ 2,750	2,989	3,209	3,914
Carrying value	$ 259,198		$ 258,240
Allowance as a percentage of carrying value	0.78%		1.06%
Consumer real estate | Purchased Credit-impaired
Purchased credit-impaired loans
Valuation allowance	$ 315		$ 419
Carrying value gross of valuation allowance	11,312		13,738
Credit card and other consumer
Impaired loans and troubled debt restructurings
Allowance for loan and lease losses	125		189
Carrying value	$ 485		$ 610
Allowance as a percentage of carrying value	25.77%		30.98%
Loans collectively evaluated for impairment
Allowance for loan and lease losses	$ 3,425		$ 3,283
Carrying value	$ 187,932		$ 197,470
Allowance as a percentage of carrying value	1.82%		1.66%
Purchased credit-impaired loans
Valuation allowance	$ 3,550			3,390
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	3,550	3,386	3,229	3,390	3,334	3,471
Carrying value	$ 188,417		$ 188,866
Allowance as a percentage of carrying value	1.88%		1.71%
Credit card and other consumer | Credit Card Receivable | United States
Total
Loans and leases	$ 92,602		$ 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	232		273
Carrying value	$ 2,498		$ 3,202
Allowance as a percentage of carrying value	9.29%		8.53%
Loans collectively evaluated for impairment
Allowance for loan and lease losses	$ 4,879		$ 4,985
Carrying value	$ 470,719		$ 449,290
Allowance as a percentage of carrying value	1.04%		1.11%
Purchased credit-impaired loans
Valuation allowance	$ 5,873			6,080
Total
Allowance for loan and lease losses	5,111	$ 5,180	$ 5,258	$ 5,313	$ 5,294	$ 4,849
Carrying value	$ 473,217		$ 452,492
Allowance as a percentage of carrying value	1.08%		1.16%
Loans and leases	$ 478,524		$ 458,526
Commercial | Estimate of Fair Value Measurement
Total
Loans and leases	5,307		6,034
Commercial | United States
Total
Loans and leases	282,677		270,372
Commercial | Non United States
Total
Loans and leases	$ 95,896		$ 89,397

Securitizations and Other Var80

Securitizations and Other Variable Interest Entities - First Lien Mortgage Securitizations (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
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	$ 3,833	$ 7,131	$ 11,791	$ 18,580
Gains on securitizations	40	89	140	322
Repurchases from securitization trusts	609	684	2,083	2,058
Assets of deconsolidated securitization vehicles	0	326	0	3,100
Gain (loss) on deconsolidation		11		125
Commercial Mortgage
Securitization or Asset-backed Financing Arrangement, Financial Asset for which Transfer is Accounted as Sale [Line Items]
Cash proceeds from new securitizations	1,225	1,052	2,931	3,031
Gains on securitizations	14	27	67	18
Repurchases from securitization trusts	0	0	0	0
First Lien Mortgages
Securitization or Asset-backed Financing Arrangement, Financial Asset for which Transfer is Accounted as Sale [Line Items]
Gain (loss) on loans securitized	63	149	195	349
Mortgage loans serviced for investors	289,300	355,000	289,300	355,000
Servicing fees	213	286	691	887
Transfers continuing involvement servicing fee advances	4,700		4,700		$ 6,200
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	$ 770	$ 1,200	$ 1,300	$ 3,100

Securitizations and Other Var81

Securitizations and Other Variable Interest Entities - First Lien Mortgages VIE (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
On-balance sheet assets
Trading account assets	$ 210,319,000,000		$ 210,319,000,000		$ 180,209,000,000
Debt securities carried at fair value	316,864,000,000		316,864,000,000		313,660,000,000
Held-to-maturity securities	122,345,000,000		122,345,000,000		117,071,000,000
Loans and leases	927,117,000,000		927,117,000,000		906,683,000,000
All other assets	128,569,000,000		128,569,000,000		120,709,000,000
Total assets	2,283,896,000,000	$ 2,195,314,000,000	2,283,896,000,000	$ 2,195,314,000,000	2,187,702,000,000
On-balance sheet liabilities
Long-term debt	228,666,000,000		228,666,000,000		216,823,000,000
Total liabilities	2,011,437,000,000		2,011,437,000,000		1,920,862,000,000
Other than temporary impairment losses recorded on debt securities	2,000,000		14,000,000
Unpaid principal balance of mortgage loans eligible for repurchase	147,000,000		147,000,000		189,000,000
Principal amount that would be payable to the securitization vehicles	147,000,000		147,000,000		189,000,000
Unconsolidated VIEs | Residential Mortgage - Agency
Variable Interest Entity [Line Items]
Maximum loss exposure	19,585,000,000		19,585,000,000		22,661,000,000
On-balance sheet assets
Residual interests held	0		0		0
All other assets	11,000,000		11,000,000		12,000,000
Total assets	19,585,000,000		19,585,000,000		22,661,000,000
Principal balance outstanding	242,353,000,000		242,353,000,000		265,332,000,000
Unconsolidated VIEs | Residential Mortgage - Agency | Senior Lien
On-balance sheet assets
Trading account assets	300,000,000		300,000,000		1,399,000,000
Debt securities carried at fair value	15,827,000,000		15,827,000,000		17,620,000,000
Held-to-maturity securities	3,447,000,000		3,447,000,000		3,630,000,000
Unconsolidated VIEs | Residential Mortgage - Agency | Junior Lien
On-balance sheet assets
Trading account assets	0		0		0
Debt securities carried at fair value	0		0		0
Held-to-maturity securities	0		0		0
Unconsolidated VIEs | Non-agency | Prime
Variable Interest Entity [Line Items]
Maximum loss exposure	623,000,000		623,000,000		757,000,000
On-balance sheet assets
Residual interests held	0		0		0
All other assets	23,000,000		23,000,000		28,000,000
Total assets	407,000,000		407,000,000		498,000,000
Principal balance outstanding	11,152,000,000		11,152,000,000		16,280,000,000
Unconsolidated VIEs | Non-agency | Prime | Senior Lien
On-balance sheet assets
Trading account assets	18,000,000		18,000,000		20,000,000
Debt securities carried at fair value	359,000,000		359,000,000		441,000,000
Held-to-maturity securities	0		0		0
Unconsolidated VIEs | Non-agency | Prime | Junior Lien
On-balance sheet assets
Trading account assets	1,000,000		1,000,000		1,000,000
Debt securities carried at fair value	6,000,000		6,000,000		8,000,000
Held-to-maturity securities	0		0		0
Unconsolidated VIEs | Non-agency | Subprime
Variable Interest Entity [Line Items]
Maximum loss exposure	2,677,000,000		2,677,000,000		2,750,000,000
On-balance sheet assets
Residual interests held	0		0		0
All other assets	0		0		0
Total assets	2,301,000,000		2,301,000,000		2,372,000,000
Principal balance outstanding	10,993,000,000		10,993,000,000		19,373,000,000
Unconsolidated VIEs | Non-agency | Subprime | Senior Lien
On-balance sheet assets
Trading account assets	51,000,000		51,000,000		112,000,000
Debt securities carried at fair value	2,226,000,000		2,226,000,000		2,235,000,000
Held-to-maturity securities	0		0		0
Unconsolidated VIEs | Non-agency | Subprime | Junior Lien
On-balance sheet assets
Trading account assets	22,000,000		22,000,000		23,000,000
Debt securities carried at fair value	2,000,000		2,000,000		2,000,000
Held-to-maturity securities	0		0		0
Unconsolidated VIEs | Non-agency | Alt-A
Variable Interest Entity [Line Items]
Maximum loss exposure	464,000,000		464,000,000		560,000,000
On-balance sheet assets
Residual interests held	0		0		0
All other assets	90,000,000		90,000,000		113,000,000
Total assets	464,000,000		464,000,000		560,000,000
Principal balance outstanding	29,550,000,000		29,550,000,000		35,788,000,000
Unconsolidated VIEs | Non-agency | Alt-A | Senior Lien
On-balance sheet assets
Trading account assets	35,000,000		35,000,000		118,000,000
Debt securities carried at fair value	318,000,000		318,000,000		305,000,000
Held-to-maturity securities	0		0		0
Unconsolidated VIEs | Non-agency | Alt-A | Junior Lien
On-balance sheet assets
Trading account assets	1,000,000		1,000,000		1,000,000
Debt securities carried at fair value	20,000,000		20,000,000		23,000,000
Held-to-maturity securities	0		0		0
Unconsolidated VIEs | Commercial Mortgage
Variable Interest Entity [Line Items]
Maximum loss exposure	420,000,000		420,000,000		344,000,000
On-balance sheet assets
Residual interests held	25,000,000		25,000,000		25,000,000
All other assets	0		0		0
Total assets	302,000,000		302,000,000		221,000,000
Principal balance outstanding	24,945,000,000		24,945,000,000		23,826,000,000
Unconsolidated VIEs | Commercial Mortgage | Senior Lien
On-balance sheet assets
Trading account assets	58,000,000		58,000,000		51,000,000
Debt securities carried at fair value	0		0		0
Held-to-maturity securities	160,000,000		160,000,000		64,000,000
Unconsolidated VIEs | Commercial Mortgage | Junior Lien
On-balance sheet assets
Trading account assets	11,000,000		11,000,000		14,000,000
Debt securities carried at fair value	48,000,000		48,000,000		54,000,000
Held-to-maturity securities	0		0		13,000,000
Unconsolidated VIEs | First Lien Mortgage Securitization Trusts
On-balance sheet liabilities
Other than temporary impairment losses recorded on debt securities	0	16,000,000	1,000,000	5,000,000
Other than temporary impairment losses recorded on held-to-maturity securities		$ 0	0	$ 0
Consolidated VIEs
On-balance sheet assets
Trading account assets	5,142,000,000		5,142,000,000		5,773,000,000
Loans and leases	50,022,000,000		50,022,000,000		56,001,000,000
All other assets	662,000,000		662,000,000		1,596,000,000
Total assets	54,869,000,000		54,869,000,000		62,526,000,000
On-balance sheet liabilities
Long-term debt	9,457,000,000		9,457,000,000		10,646,000,000
All other liabilities	54,000,000		54,000,000		41,000,000
Total liabilities	9,633,000,000		9,633,000,000		11,035,000,000
Consolidated VIEs | Residential Mortgage - Agency
Variable Interest Entity [Line Items]
Maximum loss exposure	15,040,000,000		15,040,000,000		18,084,000,000
On-balance sheet assets
Trading account assets	37,000,000		37,000,000		434,000,000
Loans and leases	14,762,000,000		14,762,000,000		17,223,000,000
All other assets	241,000,000		241,000,000		427,000,000
Total assets	15,040,000,000		15,040,000,000		18,084,000,000
On-balance sheet liabilities
Long-term debt	0		0		0
All other liabilities	2,000,000		2,000,000		4,000,000
Total liabilities	2,000,000		2,000,000		4,000,000
Consolidated VIEs | Non-agency | Prime
Variable Interest Entity [Line Items]
Maximum loss exposure	337,000,000		337,000,000		0
On-balance sheet assets
Trading account assets	330,000,000		330,000,000		0
Loans and leases	0		0		0
All other assets	7,000,000		7,000,000		0
Total assets	337,000,000		337,000,000		0
On-balance sheet liabilities
Long-term debt	0		0		0
All other liabilities	0		0		0
Total liabilities	0		0		0
Consolidated VIEs | Non-agency | Subprime
Variable Interest Entity [Line Items]
Maximum loss exposure	0		0		0
On-balance sheet assets
Trading account assets	0		0		0
Loans and leases	0		0		0
All other assets	0		0		0
Total assets	0		0		0
On-balance sheet liabilities
Long-term debt	0		0		0
All other liabilities	0		0		0
Total liabilities	0		0		0
Consolidated VIEs | Non-agency | Alt-A
Variable Interest Entity [Line Items]
Maximum loss exposure	0		0		25,000,000
On-balance sheet assets
Trading account assets	0		0		99,000,000
Loans and leases	0		0		0
All other assets	0		0		0
Total assets	0		0		99,000,000
On-balance sheet liabilities
Long-term debt	0		0		74,000,000
All other liabilities	0		0		0
Total liabilities	0		0		74,000,000
Consolidated VIEs | Commercial Mortgage
Variable Interest Entity [Line Items]
Maximum loss exposure	0		0		0
On-balance sheet assets
Trading account assets	0		0		0
Loans and leases	0		0		0
All other assets	0		0		0
Total assets	0		0		0
On-balance sheet liabilities
Long-term debt	0		0		0
All other liabilities	0		0		0
Total liabilities	$ 0		$ 0		$ 0

Securitizations and Other Var82

Securitizations and Other Variable Interest Entities - Home Equity Loan, Credit Card and Other Asset-backed VIEs (Details) - USD ($) $ in Millions	Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Dec. 31, 2015
On-balance sheet assets
Trading account assets	$ 210,319		$ 180,209
Debt securities carried at fair value	316,864		313,660
Held-to-maturity securities	122,345		117,071
Loans and leases	927,117		906,683
Allowance for loan and lease losses	(10,693)	$ (10,875)	(11,237)	$ (11,692)	$ (11,837)	$ (12,234)
All other assets	128,569		120,709
Total assets	2,283,896		2,187,702	$ 2,195,314
On-balance sheet liabilities
Long-term debt	228,666		216,823
Total liabilities	2,011,437		1,920,862
Consolidated VIEs
On-balance sheet assets
Trading account assets	5,142		5,773
Loans and leases	50,022		56,001
Allowance for loan and lease losses	(1,023)		(1,032)
All other assets	662		1,596
Total assets	54,869		62,526
On-balance sheet liabilities
Long-term debt	9,457		10,646
All other liabilities	54		41
Total liabilities	9,633		11,035
Home equity lines of credit | Unconsolidated VIEs
Variable Interest Entity [Line Items]
Maximum loss exposure	1,632		2,732
On-balance sheet assets
Total assets	39		46
Unconsolidated total assets of VIEs	2,598		4,274
Home equity lines of credit | Consolidated VIEs
Variable Interest Entity [Line Items]
Maximum loss exposure	119		149
On-balance sheet assets
Trading account assets	0		0
Loans and leases	192		244
Allowance for loan and lease losses	(13)		(16)
All other assets	6		7
Total assets	185		235
On-balance sheet liabilities
Short-term borrowings	0		0
Long-term debt	82		108
All other liabilities	0		0
Total liabilities	82		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	39		46
Held-to-maturity securities	0		0
Home equity lines of credit | Junior Lien | Unconsolidated VIEs
On-balance sheet assets
Trading account assets	0		0
Debt securities carried at fair value	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	22,937		25,859
On-balance sheet assets
Trading account assets	0		0
Loans and leases	32,281		35,135
Allowance for loan and lease losses	(1,002)		(1,007)
All other assets	276		793
Total assets	31,555		34,921
On-balance sheet liabilities
Short-term borrowings	0		0
Long-term debt	8,598		9,049
All other liabilities	20		13
Total liabilities	8,618		9,062
Residual interests held	15,300		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
Trading account assets	0		0
Debt securities carried at fair value	0		0
Resecuritization Trusts | Unconsolidated VIEs
Variable Interest Entity [Line Items]
Maximum loss exposure	9,107		9,906
On-balance sheet assets
Total assets	9,107		9,906
Unconsolidated total assets of VIEs	21,822		22,155
Resecuritization Trusts | Consolidated VIEs
Variable Interest Entity [Line Items]
Maximum loss exposure	343		420
On-balance sheet assets
Trading account assets	864		1,428
Loans and leases	0		0
Allowance for loan and lease losses	0		0
All other assets	0		0
Total assets	864		1,428
On-balance sheet liabilities
Short-term borrowings	0		0
Long-term debt	521		1,008
All other liabilities	0		0
Total liabilities	521		1,008
Resecuritization Trusts | Senior Lien | Unconsolidated VIEs
On-balance sheet assets
Trading account assets	1,246		902
Debt securities carried at fair value	1,891		2,338
Held-to-maturity securities	5,866		6,569
Resecuritization Trusts | Junior Lien | Unconsolidated VIEs
On-balance sheet assets
Trading account assets	30		27
Debt securities carried at fair value	74		70
Municipal Bond Trusts | Unconsolidated VIEs
Variable Interest Entity [Line Items]
Maximum loss exposure	1,566		1,635
On-balance sheet assets
Total assets	9		0
Unconsolidated total assets of VIEs	2,250		2,406
Municipal Bond Trusts | Consolidated VIEs
Variable Interest Entity [Line Items]
Maximum loss exposure	1,215		1,442
On-balance sheet assets
Trading account assets	1,214		1,454
Loans and leases	0		0
Allowance for loan and lease losses	0		0
All other assets	1		0
Total assets	1,215		1,454
On-balance sheet liabilities
Short-term borrowings	122		348
Long-term debt	0		12
All other liabilities	0		0
Total liabilities	122		360
Municipal Bond Trusts | Senior Lien | Unconsolidated VIEs
On-balance sheet assets
Trading account assets	9		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
Trading account assets	0		0
Debt securities carried at fair value	$ 0		$ 0

Securitizations and Other Var83

Securitizations and Other Variable Interest Entities - Other Asset-backed Securitizations, Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Credit Card Receivable
Variable Interest Entity [Line Items]
Principal balance outstanding	$ 7,400		$ 7,400		$ 7,500
Transferred financial assets, stated interest rate	0.00%		0.00%
Credit Card Receivable | Senior Lien
Variable Interest Entity [Line Items]
Transferred financial assets, amount issued			$ 3,100	$ 750
Credit Card Receivable | Junior Lien
Variable Interest Entity [Line Items]
Transferred financial assets, amount issued			500	121
Resecuritization Trusts
Variable Interest Entity [Line Items]
Cash proceeds from new securitizations	$ 5,000	$ 5,600	20,100	20,300
Resecuritization Trusts | Debt securities
Variable Interest Entity [Line Items]
Cash proceeds from new securitizations	855	$ 430	2,700	$ 2,600
Municipal Bond Trusts | Unconsolidated VIEs
Variable Interest Entity [Line Items]
Liquidity commitments to unconsolidated securitization trusts	$ 1,600		$ 1,600		$ 1,600
Weighted average remaining life of bonds held in the trusts in years			5 years 7 months 6 days

Securitizations and Other Var84

Securitizations and Other Variable Interest Entities - Other Variable Interest Entities (Details) - USD ($) $ in Millions	Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Dec. 31, 2015
On-balance sheet assets
Trading account assets	$ 210,319		$ 180,209
Debt securities carried at fair value	316,864		313,660
Loans and leases	927,117		906,683
Allowance for loan and lease losses	(10,693)	$ (10,875)	(11,237)	$ (11,692)	$ (11,837)	$ (12,234)
Loans held-for-sale	13,243		9,066
All other assets	128,569		120,709
Total assets	2,283,896		2,187,702	$ 2,195,314
On-balance sheet liabilities
Long-term debt	228,666		216,823
Total liabilities	2,011,437		1,920,862
Consolidated VIEs
On-balance sheet assets
Trading account assets	5,142		5,773
Loans and leases	50,022		56,001
Allowance for loan and lease losses	(1,023)		(1,032)
Loans held-for-sale	66		188
All other assets	662		1,596
Total assets	54,869		62,526
On-balance sheet liabilities
Long-term debt	9,457		10,646
All other liabilities	54		41
Total liabilities	9,633		11,035
Other Variable Interest Entities
Variable Interest Entity [Line Items]
Maximum loss exposure	25,074		23,868
On-balance sheet assets
Trading account assets	3,000		2,591
Debt securities carried at fair value	197		122
Loans and leases	6,987		6,648
Allowance for loan and lease losses	(41)		(33)
Loans held-for-sale	909		652
All other assets	13,848		13,525
Total assets	24,900		23,505
On-balance sheet liabilities
Long-term debt	256		395
All other liabilities	3,178		2,983
Total liabilities	3,434		3,378
Consolidated total assets of VIEs	5,673		6,305
Unconsolidated total assets of VIEs	69,817		62,269
Total assets of VIEs	75,490		68,574
Other Variable Interest Entities | Consolidated VIEs
Variable Interest Entity [Line Items]
Maximum loss exposure	5,398		6,114
On-balance sheet assets
Trading account assets	2,697		2,358
Debt securities carried at fair value	0		0
Loans and leases	2,787		3,399
Allowance for loan and lease losses	(8)		(9)
Loans held-for-sale	66		188
All other assets	131		369
Total assets	5,673		6,305
On-balance sheet liabilities
Long-term debt	256		395
All other liabilities	32		24
Total liabilities	288		419
Long-term debt with recourse to general corporation credit	13		229
Other Variable Interest Entities | Unconsolidated VIEs
Variable Interest Entity [Line Items]
Maximum loss exposure	19,676		17,754
On-balance sheet assets
Trading account assets	303		233
Debt securities carried at fair value	197		122
Loans and leases	4,200		3,249
Allowance for loan and lease losses	(33)		(24)
Loans held-for-sale	843		464
All other assets	13,717		13,156
Total assets	19,227		17,200
On-balance sheet liabilities
Long-term debt	0		0
All other liabilities	3,146		2,959
Total liabilities	$ 3,146		$ 2,959

Securitizations and Other Var85

Securitizations and Other Variable Interest Entities - Other Variable Interest Entities, Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Variable Interest Entity [Line Items]
Total assets	$ 2,283,896	$ 2,195,314	$ 2,283,896	$ 2,195,314	$ 2,187,702
Consolidated VIEs
Variable Interest Entity [Line Items]
Total assets	54,869		54,869		62,526
Customer Vehicles
Variable Interest Entity [Line Items]
Maximum loss exposure	2,400		2,400		2,900
Liquidity commitments to unconsolidated securitization trusts	55		55		323
Collateralized Debt Obligations
Variable Interest Entity [Line Items]
Maximum loss exposure	428		428		430
Investment Vehicles
Variable Interest Entity [Line Items]
Maximum loss exposure	6,400		6,400		5,100
Investment Vehicles | Consolidated VIEs
Variable Interest Entity [Line Items]
Total assets	683		683		846
Investment Vehicles | Unconsolidated VIEs
Variable Interest Entity [Line Items]
Maximum loss exposure	90		90		150
Total assets	24,100		24,100		17,300
Consolidated total assets of VIEs	45		45		75
Leveraged Lease Trusts | Consolidated VIEs
Variable Interest Entity [Line Items]
Total assets	2,300		2,300		2,600
Tax Credit Vehicles
Investments in Affordable Housing Projects [Abstract]
Unfunded commitments	2,800		$ 2,800		2,700
Unfunded commitment payment period			5 years
Tax credits and other benefits	293	337	$ 825	819
Expected tax benefits recognized, as a percentage			25.00%
Tax Credit Vehicles | Other income
Investments in Affordable Housing Projects [Abstract]
Pretax losses	209	$ 200	$ 612	$ 596
Tax Credit Vehicles | Other assets
Investments in Affordable Housing Projects [Abstract]
Investments in affordable housing project investments	7,600		7,600		7,400
Tax Credit Vehicles | Unconsolidated VIEs
Variable Interest Entity [Line Items]
Total assets	$ 13,400		$ 13,400		$ 12,600

Representations and Warrantie86

Representations and Warranties Obligations and Corporate Guarantees - Additional Information (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Loss Contingencies [Line Items]
New purchase claims	$ 71
Claims resolved	746
Claims resolved by settlements	640
Unresolved repurchase claims, net of duplicated claims	17,602	$ 18,277
Maximum
Loss Contingencies [Line Items]
Maximum estimated range of possible loss	1,500
Representations and Warranties Exposure | Maximum
Loss Contingencies [Line Items]
Maximum estimated range of possible loss	2,000
Sponsors of Third-Party Securitizations
Loss Contingencies [Line Items]
Unresolved repurchase claims, net of duplicated claims	1,300	1,300
Private-label securitization trustees, whole-loan investors, including third-party securitization sponsors and other
Loss Contingencies [Line Items]
Unresolved repurchase claims, net of duplicated claims	16,019	16,685
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 Warrantie87

Representations and Warranties Obligations and Corporate Guarantees - Unresolved Repurchase Claims by Counterparty, net of duplicate claims (Details) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Loss Contingencies [Line Items]
Unresolved repurchase claims, net of duplicated claims	$ 17,602	$ 18,277
Outstanding claims with review	11,300	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	16,019	16,685
Monolines
Loss Contingencies [Line Items]
Unresolved repurchase claims, net of duplicated claims	1,578	1,583
GSEs
Loss Contingencies [Line Items]
Unresolved repurchase claims, net of duplicated claims	$ 5	$ 9

Representations and Warrantie88

Representations and Warranties Obligations and Corporate Guarantees - Schedule of Reserves (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended		9 Months Ended
	Feb. 29, 2016	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 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]
Additions for new sales		$ 1	$ 1	$ 3	$ 3
Payments		(297)	(23)	(385)	(8,687)
Representations and Warranties Obligations and Corporate Guarantees | Mortgage Banking Income
Loss Contingency Accrual [Roll Forward]
Provision		198	99	193	158
Representations and Warranties Obligations and Corporate Guarantees | Accrued Liabilities and Other Liabilities
Loss Contingency Accrual [Roll Forward]
Reserve for representations and warranties and corporate guarantees, beginning of period		2,248	2,723	2,339	11,326
Liability for representations and warranties and corporate guarantees, December 31		$ 2,150	$ 2,800	$ 2,150	$ 2,800

Goodwill and Intangible Asset89

Goodwill and Intangible Assets - Schedule of Goodwill (Details) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Goodwill [Line Items]
Total goodwill	$ 68,968	$ 68,969
Less: Goodwill of business held for sale	0	(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	9,680	9,681
Operating Segments | Global Banking
Goodwill [Line Items]
Total goodwill	23,923	23,923
Operating Segments | Global Markets
Goodwill [Line Items]
Total goodwill	5,197	5,197
All Other
Goodwill [Line Items]
All Other	$ 45	$ 820

Goodwill and Intangible Asset90

Goodwill and Intangible Assets - Schedule of Intangible Assets (Details) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Intangible Assets [Abstract]
Gross Carrying Value	$ 13,640	$ 14,553
Accumulated Amortization	11,182	11,564
Net Carrying Value	2,458	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	6,830
Accumulated Amortization	5,553	6,243
Net Carrying Value	366	587
Core deposit intangibles
Intangible Assets [Abstract]
Gross Carrying Value	3,835	3,836
Accumulated Amortization	2,120	2,046
Net Carrying Value	1,715	1,790
Customer relationships
Intangible Assets [Abstract]
Gross Carrying Value	3,886	3,887
Accumulated Amortization	3,509	3,275
Net Carrying Value	$ 377	$ 612

Goodwill and Intangible Asset91

Goodwill and Intangible Assets - Additional Information (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization of intangibles	$ 151,000,000	$ 181,000,000	$ 473,000,000	$ 554,000,000
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Remainder of 2017	147,000,000		147,000,000
2,018	538,000,000		538,000,000
2,019	105,000,000		105,000,000
2,020	53,000,000		53,000,000
2,021	0		0
Thereafter	$ 0		$ 0

Federal Funds Sold or Purchas92

Federal Funds Sold or Purchased, Securities Financing Agreements and Short-term Borrowings (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Federal funds purchased and securities loaned or sold under agreements to repurchase
Amount
Average during year	$ 197,794	$ 177,883	$ 199,433	$ 184,500
Maximum month-end balance during year	$ 197,604	$ 192,536	$ 218,017	$ 196,631
Rate
Average during year (percent)	1.37%	0.93%	1.18%	1.00%
Short-term borrowings
Amount
Average during year	$ 32,153	$ 29,751	$ 38,329	$ 30,631
Maximum month-end balance during year	$ 32,679	$ 31,935	$ 46,202	$ 33,051
Rate
Average during year (percent)	2.54%	2.02%	2.43%	1.85%
Federal funds sold and securities borrowed or purchased under agreements to resell
Amount
Average during year	$ 223,585	$ 214,254	$ 222,255	$ 215,476
Maximum month-end asset outstanding amount	$ 224,815	$ 222,489	$ 237,064	$ 225,015
Rate
Average asset outstanding rate (percent)	1.17%	0.50%	1.00%	0.50%

Federal Funds Sold or Purchas93

Federal Funds Sold or Purchased, Securities Financing Agreements and Short-term Borrowings - Offsetting Assets and Liabilities (Details) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Securities borrowed or purchased under agreements to resell:
Gross Assets	$ 362,065	$ 326,970
Amounts Offset	(144,851)	(128,746)
Net Balance Sheet Amount	217,214	198,224
Financial Instruments	(165,776)	(154,974)
Net Assets	51,438	43,250
Securities loaned or sold under agreements to repurchase:
Gross Liabilities	334,627	299,028
Amounts Offset	(144,851)	(128,746)
Net Balance Sheet Amount	189,776	170,282
Financial Instruments	(161,131)	(140,774)
Net Liabilities	28,645	29,508
Other:
Gross Liabilities	22,258	14,448
Amounts Offset	0	0
Net Balance Sheet Amount	22,258	14,448
Financial Instruments	(22,258)	(14,448)
Net Liabilities	0	0
Total Securities Financing Agreements Liability:
Gross Liabilities	356,885	313,476
Amounts Offset	(144,851)	(128,746)
Net Balance Sheet Amount	212,034	184,730
Financial Instruments	(183,389)	(155,222)
Net Liabilities	28,645	29,508
Loans and leases repurchase activity	$ 11,100	$ 10,100

Federal Funds Sold or Purchas94

Federal Funds Sold or Purchased, Securities Financing Agreements and Short-term Borrowings - Repurchase Agreements and Securities Loaned Transactions Accounted for as Secured Borrowings (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Remaining Contractual Maturity
Securities sold under agreements to repurchase	$ 310,076	$ 280,236
Securities loaned	24,551	18,792
Other	22,258	14,448
Total	$ 356,885	313,476
Maximum agreement maturity period (less than)	3 years
Overnight and Continuous
Remaining Contractual Maturity
Securities sold under agreements to repurchase	$ 119,610	129,853
Securities loaned	16,027	8,564
Other	22,258	14,448
Total	157,895	152,865
30 Days or Less
Remaining Contractual Maturity
Securities sold under agreements to repurchase	89,934	77,780
Securities loaned	404	6,602
Other	0	0
Total	90,338	84,382
After 30 Days Through 90 Days
Remaining Contractual Maturity
Securities sold under agreements to repurchase	41,358	31,851
Securities loaned	1,989	1,473
Other	0	0
Total	43,347	33,324
Greater than 90 Days
Remaining Contractual Maturity
Securities sold under agreements to repurchase	59,174	40,752
Securities loaned	6,131	2,153
Other	0	0
Total	$ 65,305	$ 42,905

Federal Funds Sold or Purchas95

Federal Funds Sold or Purchased, Securities Financing Agreements and Short-term Borrowings - Class of Collateral Pledged (Details) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Class of Collateral Pledged
Securities Sold Under Agreements to Repurchase	$ 310,076	$ 280,236
Securities Loaned	24,551	18,792
Other	22,258	14,448
Total	356,885	313,476
U.S. Treasury and agency securities
Class of Collateral Pledged
Securities Sold Under Agreements to Repurchase	169,501	153,184
Securities Loaned	0	0
Other	281	70
Total	169,782	153,254
Corporate securities, trading loans and other
Class of Collateral Pledged
Securities Sold Under Agreements to Repurchase	8,933	11,086
Securities Loaned	1,339	1,630
Other	443	127
Total	10,715	12,843
Equity securities
Class of Collateral Pledged
Securities Sold Under Agreements to Repurchase	30,483	24,007
Securities Loaned	17,892	11,175
Other	21,479	14,196
Total	69,854	49,378
Non-U.S. sovereign debt
Class of Collateral Pledged
Securities Sold Under Agreements to Repurchase	95,997	84,171
Securities Loaned	5,320	5,987
Other	55	55
Total	101,372	90,213
Mortgage trading loans and ABS
Class of Collateral Pledged
Securities Sold Under Agreements to Repurchase	5,162	7,788
Securities Loaned	0	0
Other	0	0
Total	$ 5,162	$ 7,788

Commitments and Contingencies -

Commitments and Contingencies - Credit Extension Commitments Narrative (Details) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Commitments and Contingencies Disclosure [Abstract]
Legally binding unfunded commitments syndicated	$ 11,300	$ 12,100
Carrying amount credit extension commitments syndicated	780	779
Deferred revenue	18	17
Other liabilities reserve for unfunded lending commitments	762	762
Notional amount of credit extension commitments under fair value option	4,900	7,000
Unfunded loan commitments
Other Commitments [Line Items]
Fair value carrying amount liabilities	$ 101	$ 173

Commitments and Contingencies97

Commitments and Contingencies - Credit Extension Commitments (Details) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Other Commitments [Line Items]
Expire in One Year or Less	$ 476,726	$ 489,638
Expire After One Year Through Three Years	150,056	154,621
Expire After Three Years Through Five Years	150,221	158,837
Expire After Five Years	50,205	48,259
Total	827,208	851,355
Legally binding commitments
Other Commitments [Line Items]
Expire in One Year or Less	111,719	111,865
Expire After One Year Through Three Years	150,056	154,621
Expire After Three Years Through Five Years	150,221	158,837
Expire After Five Years	50,205	48,259
Total	462,201	473,582
Loan commitments
Other Commitments [Line Items]
Expire in One Year or Less	81,579	82,609
Expire After One Year Through Three Years	133,609	133,063
Expire After Three Years Through Five Years	145,154	152,854
Expire After Five Years	18,639	22,129
Total	378,981	390,655
Home equity lines of credit
Other Commitments [Line Items]
Expire in One Year or Less	7,400	8,806
Expire After One Year Through Three Years	5,531	10,701
Expire After Three Years Through Five Years	2,212	2,644
Expire After Five Years	30,265	25,050
Total	45,408	47,201
Standby letters of credit and other
Other Commitments [Line Items]
Expire in One Year or Less	21,520	19,165
Expire After One Year Through Three Years	10,814	10,754
Expire After Three Years Through Five Years	2,760	3,225
Expire After Five Years	1,221	1,027
Total	36,315	34,171
Standby letters of credit and other | Credit Card and Other Consumer
Other Commitments [Line Items]
Total	375	376
Standby letters of credit and other | Investment grade
Other Commitments [Line Items]
Total	26,500	25,500
Standby letters of credit and other | Non-investment grade
Other Commitments [Line Items]
Total	8,200	8,300
Letters of credit
Other Commitments [Line Items]
Expire in One Year or Less	1,220	1,285
Expire After One Year Through Three Years	102	103
Expire After Three Years Through Five Years	95	114
Expire After Five Years	80	53
Total	1,497	1,555
Credit card lines
Other Commitments [Line Items]
Expire in One Year or Less	365,007	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	$ 365,007	$ 377,773

Commitments and Contingencies98

Commitments and Contingencies - Other Commitments (Details) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Operating Leases, Future Minimum Payments Receivable [Abstract]
2,017	$ 576
2,018	2,300
2,019	2,100
2,020	1,900
2,021	1,600
Thereafter	5,800
Liquefied Natural Gas Commodities
Loss Contingencies [Line Items]
Other commitments	1,600	$ 1,900
Forward-Dated Resale and Securities Borrowing Agreements
Loss Contingencies [Line Items]
Other commitments	77,200	48,900
Forward-Dated Repurchase and Securities Lending Agreements
Loss Contingencies [Line Items]
Other commitments	47,700	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 this year	950
Residential and Commercial Portfolio Segments | Residential and Commercial Financing Receivable | Loan Purchase Commitments
Loss Contingencies [Line Items]
Other commitments	452	767
Commercial Portfolio Segment | Loan Purchase Commitments
Loss Contingencies [Line Items]
Other commitments	$ 2,000	$ 636

Commitments and Contingencies99

Commitments and Contingencies - Other Guarantees (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Merchant Servicing Joint Venture
Loss Contingencies [Line Items]
Equity method investment ownership percentage	49.00%		49.00%
Carrying value of investment	$ 2,900		$ 2,900		$ 2,900
Merchant Processing Servicers, Sponsored Entities
Loss Contingencies [Line Items]
Transactions processed and settled by sponsored entities	200,400	$ 189,900	591,800	$ 527,700
Losses as result of cardholder disputed transactions	7	$ 9	22	$ 23
Life Insurance Book Value Protection
Loss Contingencies [Line Items]
Notional amount of derivatives	14,000		14,000		13,900
Maximum potential exposure	3,200		3,200		3,200
Net fair value of bank-owned life insurance book value protection	2		2		4
Merchant Services | Merchant Processing Servicers, Sponsored Entities
Loss Contingencies [Line Items]
Maximum potential exposure	334,900		334,900		325,700
Other Guarantee
Loss Contingencies [Line Items]
Maximum potential exposure	$ 6,500		$ 6,500		$ 6,700

Commitments and Contingencie100

Commitments and Contingencies - Litigation and Regulatory Matters (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Commitments and Contingencies Disclosure [Abstract]
Litigation settlement expense	$ 140,000,000	$ 250,000,000	$ 606,000,000	$ 908,000,000
Minimum
Loss Contingencies [Line Items]
Estimated range of possible loss	0		0
Maximum
Loss Contingencies [Line Items]
Estimated range of possible loss	$ 1,500,000,000		$ 1,500,000,000

Shareholders' Equity - Declared

Shareholders' Equity - Declared Quarterly Cash Dividends on Common Stock (Details) - $ / shares	Oct. 25, 2017	Jul. 26, 2017	Apr. 26, 2017	Jan. 26, 2017	Sep. 30, 2017
Subsequent Event [Line Items]
Dividends per share (in dollars per share)		$ 0.12	$ 0.075	$ 0.075	$ 0.12
Subsequent Event
Subsequent Event [Line Items]
Dividends per share (in dollars per share)	$ 0.12

Shareholders' Equity - Narrativ

Shareholders' Equity - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions	Aug. 24, 2017	Jul. 26, 2017	Apr. 26, 2017	Jan. 26, 2017	Sep. 30, 2017	Sep. 30, 2017	Sep. 30, 2016
Common Stock
Common stock repurchased						$ 7,945	$ 3,782
Common stock dividends declared (in dollars per share)		$ 0.12	$ 0.075	$ 0.075	$ 0.12
Share-based compensation, number of shares authorized (in shares)					873,000,000	873,000,000
Preferred Stock
Preferred stock dividends						$ 1,292	$ 1,321
Series T Preferred Stock
Common Stock
Per Annum Dividend Rate	6.00%
Carrying amount of stock	$ 2,900
Common Stock
Common Stock
Common stock issued in connection with exercise of warrants and exchange of preferred stock (in shares)	700,000,000
Stock issued (in shares)						66,000,000
Shares paid for tax withholding for share based compensation (in shares)						27,000,000
Preferred Stock
Preferred Stock
Preferred stock dividends					$ 465	$ 1,300
Shares issued (in shares)						0
Warrants Expiring October 18, 2018
Common Stock
Warrants outstanding (in shares)					122,000,000	122,000,000
Minimum required dividend rate (in dollars per share)					$ 0.32	$ 0.32
Exercise price per warrant (in dollars per share)					$ 30.79	$ 30.79
Warrants Expiring January 16, 2019
Common Stock
Warrants outstanding (in shares)					150,000,000	150,000,000
Minimum required dividend rate (in dollars per share)					$ 0.01	$ 0.01
Exercise price per warrant (in dollars per share)					$ 12.807	$ 12.807
2017 CCAR | Common Stock
Common Stock
Common stock repurchased (in shares)					124,000,000
Common stock repurchased					$ 3,000

Accumulated Other Comprehens103

Accumulated Other Comprehensive Income (Loss) - Change in Accumulated OCI (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance			$ 266,840	$ 256,176
Net change	$ 437	$ 268	1,120	3,657
Ending Balance	272,459	270,083	272,459	270,083
Debit Valuation Adjustments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance			(767)	(611)
Net change			(149)	49
Ending Balance	(916)	(562)	(916)	(562)
Derivatives
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance			(895)	(1,077)
Net change			156	277
Ending Balance	(739)	(800)	(739)	(800)
Employee Benefit Plans
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance			(3,480)	(2,956)
Net change			80	29
Ending Balance	(3,400)	(2,927)	(3,400)	(2,927)
Foreign currency
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance			(879)	(792)
Net change			102	(17)
Ending Balance	(777)	(809)	(777)	(809)
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance			(7,288)	(5,358)
Net change			1,120	3,657
Ending Balance	(6,168)	(1,701)	(6,168)	(1,701)
Debt securities | Available-for-sale securities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance			(1,299)	16
Net change			945	3,362
Ending Balance	(354)	3,378	(354)	3,378
Equity securities | Available-for-sale securities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance			32	62
Net change			(14)	(43)
Ending Balance	$ 18	$ 19	$ 18	$ 19

Accumulated Other Comprehens104

Accumulated Other Comprehensive Income (Loss) - Changes in OCI Components Before- and After-tax (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
After-tax
Comprehensive income	$ 6,024	$ 5,223	$ 16,832	$ 16,867
Total other comprehensive income (loss)
Before-tax
Net change			581	6,060
Tax effect
Net change			539	(2,403)
After-tax
Comprehensive income			1,120	3,657
Available-for-sale securities | Debt securities
Before-tax
Net increase (decrease) in fair value			1,757	5,896
Net realized (gains) losses reclassified into earnings			(245)	(476)
Net change			1,512	5,420
Tax effect
Net increase (decrease) in fair value			(657)	(2,239)
Net realized (gains) losses reclassified into earnings			90	181
Net change			(567)	(2,058)
After-tax
Other comprehensive income (loss) before reclassification, net of tax			1,100	3,657
Net realized (gains) losses reclassified into earnings			(155)	(295)
Comprehensive income			945	3,362
Available-for-sale securities | Debt securities | Gains on sales of debt securities
Before-tax
Net realized (gains) losses reclassified into earnings			(278)	(490)
Tax effect
Net realized (gains) losses reclassified into earnings			106	186
After-tax
Net realized (gains) losses reclassified into earnings			(172)	(304)
Available-for-sale securities | Debt securities | Other income
Before-tax
Net realized (gains) losses reclassified into earnings			33	14
Tax effect
Net realized (gains) losses reclassified into earnings			(16)	(5)
After-tax
Net realized (gains) losses reclassified into earnings			17	9
Available-for-sale securities | Equity securities
Before-tax
Net increase (decrease) in fair value			45	(70)
Net realized (gains) losses reclassified into earnings			(67)	0
Net change			(22)	(70)
Tax effect
Net increase (decrease) in fair value			(17)	27
Net realized (gains) losses reclassified into earnings			25	0
Net change			8	27
After-tax
Other comprehensive income (loss) before reclassification, net of tax			28	(43)
Net realized (gains) losses reclassified into earnings			(42)	0
Comprehensive income			(14)	(43)
Debit Valuation Adjustments
Before-tax
Net increase (decrease) in fair value			(255)	61
Net realized (gains) losses reclassified into earnings			30	18
Net change			(225)	79
Tax effect
Net increase (decrease) in fair value			96	(23)
Net realized (gains) losses reclassified into earnings			(20)	(7)
Net change			76	(30)
After-tax
Other comprehensive income (loss) before reclassification, net of tax			(159)	38
Net realized (gains) losses reclassified into earnings			10	11
Comprehensive income			(149)	49
Derivatives
Before-tax
Net increase (decrease) in fair value			79	(64)
Net realized (gains) losses reclassified into earnings			171	508
Net change			250	444
Tax effect
Net increase (decrease) in fair value			(30)	23
Net realized (gains) losses reclassified into earnings			(64)	(190)
Net change			(94)	(167)
After-tax
Other comprehensive income (loss) before reclassification, net of tax			49	(41)
Net realized (gains) losses reclassified into earnings			107	318
Comprehensive income			156	277
Derivatives | Net interest income
Before-tax
Net realized (gains) losses reclassified into earnings			274	447
Tax effect
Net realized (gains) losses reclassified into earnings			(103)	(167)
After-tax
Net realized (gains) losses reclassified into earnings			171	280
Derivatives | Personnel
Before-tax
Net realized (gains) losses reclassified into earnings			(103)	61
Tax effect
Net realized (gains) losses reclassified into earnings			39	(23)
After-tax
Net realized (gains) losses reclassified into earnings			(64)	38
Employee Benefit Plans
Before-tax
Net realized (gains) losses reclassified into earnings			128	64
Settlements, curtailments and other			0	0
Net change			128	64
Tax effect
Net realized (gains) losses reclassified into earnings			(48)	(25)
Settlements, curtailments and other			0	(10)
Net change			(48)	(35)
After-tax
Net realized (gains) losses reclassified into earnings			80	39
Settlements, curtailments and other			0	(10)
Comprehensive income			80	29
Prior service cost
Before-tax
Net realized (gains) losses reclassified into earnings			3	3
Tax effect
Net realized (gains) losses reclassified into earnings			(1)	(1)
After-tax
Net realized (gains) losses reclassified into earnings			2	2
Net actuarial losses
Before-tax
Net realized (gains) losses reclassified into earnings			125	61
Tax effect
Net realized (gains) losses reclassified into earnings			(47)	(24)
After-tax
Net realized (gains) losses reclassified into earnings			78	37
Foreign currency
Before-tax
Net increase (decrease) in fair value			(454)	123
Net realized (gains) losses reclassified into earnings			(608)	0
Net change			(1,062)	123
Tax effect
Net increase (decrease) in fair value			462	(140)
Net realized (gains) losses reclassified into earnings			702	0
Net change			1,164	(140)
After-tax
Other comprehensive income (loss) before reclassification, net of tax			8	(17)
Net realized (gains) losses reclassified into earnings			94	0
Comprehensive income			$ 102	$ (17)

Earnings Per Common Share - Bas

Earnings Per Common Share - Basic and Diluted (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Earnings per common share
Net income	$ 5,587	$ 4,955	$ 15,712	$ 13,210
Preferred stock dividends	(465)	(503)	(1,328)	(1,321)
Net income applicable to common shareholders	$ 5,122	$ 4,452	$ 14,384	$ 11,889
Average common shares issued and outstanding (in shares)	10,197,891	10,250,124	10,103,386	10,312,878
Earnings per common share (in dollars per share)	$ 0.50	$ 0.43	$ 1.42	$ 1.15
Diluted earnings per common share
Net income applicable to common shareholders	$ 5,122	$ 4,452	$ 14,384	$ 11,889
Add preferred stock dividends due to assumed conversions (1)	36	75	186	225
Net income allocated to common shareholders	$ 5,158	$ 4,527	$ 14,570	$ 12,114
Average common shares issued and outstanding (in thousands) (in shares)	10,197,891	10,250,124	10,103,386	10,312,878
Dilutive potential common shares (in shares)	527,591	750,349	717,039	733,929
Total diluted average common shares issued and outstanding (in thousands) (in shares)	10,725,482	11,000,473	10,820,425	11,046,807
Diluted earnings per common share (in dollars per share)	$ 0.48	$ 0.41	$ 1.35	$ 1.10

Earnings Per Common Share - Add

Earnings Per Common Share - Additional Information (Details) - $ / shares	Aug. 24, 2017	Dec. 31, 2011
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

Earnings Per Common Share - Ant

Earnings Per Common Share - Antidilutive Securities (Details) - shares shares in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Stock Options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Average options to purchase shares of common stock (in shares)	18	42	22	46
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	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	62

Earnings Per Common Share - Dil

Earnings Per Common Share - Dilutive Shares (Details) - shares shares in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Common Stock
Class of Stock [Line Items]
Incremental common shares attributable to dilutive effect of call options and warrants (in shares)	150	150	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	700

Fair Value Measurements - Recur

Fair Value Measurements - Recurring Fair Value (Details) $ in Millions	9 Months Ended
	Sep. 30, 2017USD ($)counterparty	Dec. 31, 2016USD ($)	Sep. 30, 2016USD ($)
Financial assets
Federal funds sold and securities borrowed or purchased under agreements to resell	$ 56,780	$ 49,750
Trading account assets	210,319	180,209
Gross derivative assets	370,700	631,100
Derivative assets	38,384	42,512
Total available-for-sale debt securities	300,302
Other debt securities carried at fair value	16,562	19,720
Loans and leases	6,285	7,085
Loans held-for-sale	3,128	4,026
Customer and other receivables	230
Debt securities in assets of business held for sale		619
Other assets	19,341	13,802
Liabilities
Interest-bearing deposits in U.S. offices	468	731
Federal funds purchased and securities loaned or sold under agreements to repurchase, measured at fair value	38,852	35,766
Gross derivative liabilities	362,400	628,300
Derivative liabilities	31,781	39,480
Short-term borrowings	1,904	2,024
Long-term debt	$ 29,897	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	518	469
All Other
Financial assets
Mortgage servicing rights	162	212
Derivative liabilities
Assets and Liabilities, Recurring Basis, Supplemental Information:
Liabilities transferred from Level 1 to Level 2	2,400	2,400
Liabilities transferred from Level 2 to Level 1	496	1,800
Derivative assets
Assets and Liabilities, Recurring Basis, Supplemental Information:
Assets transferred from Level 1 to Level 2	3,000	2,300
Assets transferred from Level 2 to Level 1	543	2,000
U.S. government and agency securities
Financial assets
Total available-for-sale debt securities	50,268	48,252
Agency
Financial assets
Total available-for-sale debt securities	196,194	189,486
Agency-collateralized mortgage obligations
Financial assets
Total available-for-sale debt securities	7,049	8,330
Other debt securities carried at fair value	5	5
Non-agency residential
Financial assets
Total available-for-sale debt securities	2,657	2,013
Other debt securities carried at fair value	3,058	3,139
Commercial
Financial assets
Total available-for-sale debt securities	12,464	12,322
Other taxable securities
Financial assets
Total available-for-sale debt securities	7,038	10,614
Other debt securities carried at fair value	239	240
Tax-exempt securities
Financial assets
Total available-for-sale debt securities	19,192	17,160
Recurring
Financial assets
Federal funds sold and securities borrowed or purchased under agreements to resell	56,780	49,750
Trading account assets	210,319	180,209
Netting adjustments	(332,316)	(588,604)
Derivative assets	38,384	42,512
Total available-for-sale debt securities	300,302	293,940
Other debt securities carried at fair value	16,562	19,720
Loans and leases	6,285	7,085
Mortgage servicing rights	2,407	2,747
Loans held-for-sale	3,128	4,026
Customer and other receivables	230
Debt securities in assets of business held for sale		619
Other assets	19,341	13,802
Total assets	653,738	614,410
Liabilities
Interest-bearing deposits in U.S. offices	468	731
Federal funds purchased and securities loaned or sold under agreements to repurchase, measured at fair value	38,852	35,766
Total trading account liabilities	86,434	63,031
Netting adjustment	(330,572)	(588,833)
Derivative liabilities	31,781	39,480
Short-term borrowings	1,904	2,024
Accrued expenses and other liabilities	22,369	14,630
Long-term debt	29,897	30,037
Total liabilities	211,705	185,699
Recurring | Securities Segregated for Compliance or Deposited with Clearing Organizations
Financial assets
Trading account assets	15,300	14,600
Recurring | U.S. Treasury and agency securities
Financial assets
Trading account assets	33,277	36,514
Liabilities
Total trading account liabilities	20,756	16,051
Recurring | Corporate securities, trading loans and other
Financial assets
Trading account assets	30,037	25,809
Liabilities
Total trading account liabilities	9,289	6,570
Recurring | Equity securities
Financial assets
Trading account assets	88,279	72,051
Liabilities
Total trading account liabilities	35,665	28,898
Recurring | Non-U.S. sovereign debt
Financial assets
Trading account assets	31,521	20,028
Liabilities
Total trading account liabilities	20,724	11,512
Recurring | U.S. government-sponsored agency guaranteed
Financial assets
Trading account assets	18,973	15,799
Recurring | Mortgage trading loans, ABS and other MBS
Financial assets
Trading account assets	8,232	10,008
Recurring | U.S. government and agency securities
Financial assets
Total available-for-sale debt securities	50,268	48,252
Recurring | Agency
Financial assets
Total available-for-sale debt securities	196,194	189,486
Other debt securities carried at fair value		5
Recurring | Agency-collateralized mortgage obligations
Financial assets
Total available-for-sale debt securities	7,049	8,330
Other debt securities carried at fair value	5
Recurring | Non-agency residential
Financial assets
Total available-for-sale debt securities	2,657	2,013
Other debt securities carried at fair value	3,058	3,139
Recurring | Commercial
Financial assets
Total available-for-sale debt securities	12,464	12,322
Recurring | Non-U.S. securities
Financial assets
Total available-for-sale debt securities	5,440	5,763
Other debt securities carried at fair value	13,260	16,336
Recurring | Other taxable securities
Financial assets
Total available-for-sale debt securities	7,038	10,614
Other debt securities carried at fair value	239	240
Recurring | Tax-exempt securities
Financial assets
Total available-for-sale debt securities	19,192	17,160
Recurring | US Government-sponsored enterprises debt securities
Financial assets
Trading account assets	19,500	17,500
Recurring | Level 1
Financial assets
Federal funds sold and securities borrowed or purchased under agreements to resell	0	0
Trading account assets	108,732	94,505
Gross derivative assets	6,756	7,337
Total available-for-sale debt securities	49,365	48,721
Other debt securities carried at fair value	11,911	15,109
Loans and leases	0	0
Mortgage servicing rights	0	0
Loans held-for-sale	0	0
Customer and other receivables	0
Debt securities in assets of business held for sale		619
Other assets	17,991	11,824
Total assets	194,755	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	68,854	51,310
Gross derivative liabilities	6,589	7,173
Short-term borrowings	0	0
Accrued expenses and other liabilities	21,121	12,978
Long-term debt	0	0
Total liabilities	96,564	71,461
Recurring | Level 1 | U.S. Treasury and agency securities
Financial assets
Trading account assets	32,688	34,587
Liabilities
Total trading account liabilities	20,390	15,854
Recurring | Level 1 | Corporate securities, trading loans and other
Financial assets
Trading account assets	535	171
Liabilities
Total trading account liabilities	211	163
Recurring | Level 1 | Equity securities
Financial assets
Trading account assets	58,886	50,169
Liabilities
Total trading account liabilities	31,647	25,884
Recurring | Level 1 | Non-U.S. sovereign debt
Financial assets
Trading account assets	16,623	9,578
Liabilities
Total trading account liabilities	16,606	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	48,591	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	774	1,934
Other debt securities carried at fair value	11,911	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	56,780	49,750
Trading account assets	97,797	80,925
Gross derivative assets	360,066	619,848
Total available-for-sale debt securities	249,951	243,854
Other debt securities carried at fair value	4,629	4,586
Loans and leases	5,667	6,365
Mortgage servicing rights	0	0
Loans held-for-sale	2,353	3,370
Customer and other receivables	230
Debt securities in assets of business held for sale		0
Other assets	1,083	1,739
Total assets	778,556	1,010,437
Liabilities
Interest-bearing deposits in U.S. offices	468	731
Federal funds purchased and securities loaned or sold under agreements to repurchase, measured at fair value	38,852	35,407
Total trading account liabilities	17,555	11,694
Gross derivative liabilities	349,863	615,896
Short-term borrowings	1,904	2,024
Accrued expenses and other liabilities	1,239	1,643
Long-term debt	28,007	28,523
Total liabilities	437,888	695,918
Recurring | Level 2 | U.S. Treasury and agency securities
Financial assets
Trading account assets	589	1,927
Liabilities
Total trading account liabilities	366	197
Recurring | Level 2 | Corporate securities, trading loans and other
Financial assets
Trading account assets	27,760	22,861
Liabilities
Total trading account liabilities	9,053	6,380
Recurring | Level 2 | Equity securities
Financial assets
Trading account assets	29,149	21,601
Liabilities
Total trading account liabilities	4,018	3,014
Recurring | Level 2 | Non-U.S. sovereign debt
Financial assets
Trading account assets	14,346	9,940
Liabilities
Total trading account liabilities	4,118	2,103
Recurring | Level 2 | U.S. government-sponsored agency guaranteed
Financial assets
Trading account assets	18,973	15,799
Recurring | Level 2 | Mortgage trading loans, ABS and other MBS
Financial assets
Trading account assets	6,980	8,797
Recurring | Level 2 | U.S. government and agency securities
Financial assets
Total available-for-sale debt securities	1,677	1,465
Recurring | Level 2 | Agency
Financial assets
Total available-for-sale debt securities	196,194	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	7,049	8,330
Other debt securities carried at fair value	5
Recurring | Level 2 | Non-agency residential
Financial assets
Total available-for-sale debt securities	2,657	2,013
Other debt securities carried at fair value	3,036	3,114
Recurring | Level 2 | Commercial
Financial assets
Total available-for-sale debt securities	12,464	12,322
Recurring | Level 2 | Non-U.S. securities
Financial assets
Total available-for-sale debt securities	4,630	3,600
Other debt securities carried at fair value	1,349	1,227
Recurring | Level 2 | Other taxable securities
Financial assets
Total available-for-sale debt securities	6,555	10,020
Other debt securities carried at fair value	239	240
Recurring | Level 2 | Tax-exempt securities
Financial assets
Total available-for-sale debt securities	18,725	16,618
Recurring | Level 3
Financial assets
Federal funds sold and securities borrowed or purchased under agreements to resell	0	0
Trading account assets	3,790	4,779
Gross derivative assets	3,878	3,931	$ 4,900
Total available-for-sale debt securities	986	1,365
Other debt securities carried at fair value	22	25
Loans and leases	618	720
Mortgage servicing rights	2,407	2,747
Loans held-for-sale	775	656
Customer and other receivables	0
Debt securities in assets of business held for sale		0
Other assets	267	239
Total assets	12,743	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	25	27
Gross derivative liabilities	5,901	5,244	$ 5,900
Short-term borrowings	0	0
Accrued expenses and other liabilities	9	9
Long-term debt	1,890	1,514
Total liabilities	7,825	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	1,742	2,777
Total assets	1,700	2,800
Liabilities
Total trading account liabilities	25	27
Recurring | Level 3 | Equity securities
Financial assets
Trading account assets	244	281
Liabilities
Total trading account liabilities	0	0
Recurring | Level 3 | Non-U.S. sovereign debt
Financial assets
Trading account assets	552	510
Total assets	552	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	1,252	1,211
Total assets	1,300	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	22	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	36	229
Other debt securities carried at fair value	0	0
Recurring | Level 3 | Other taxable securities
Financial assets
Total available-for-sale debt securities	483	594
Other debt securities carried at fair value	0	0
Total assets	483	594
Recurring | Level 3 | Tax-exempt securities
Financial assets
Total available-for-sale debt securities	467	542
Total assets	$ 467	$ 542

Fair Value Measurements - Recon

Fair Value Measurements - Reconciliation (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Balance, beginning	$ (1,803)	$ (648)	$ (1,313)	$ (441)
Total Realized/Unrealized Gains/(Losses)	(252)	(131)	(1,098)	356
Gains (Losses) in OCI	0	0	0	0
Purchases	150	114	558	313
Sales	(367)	(346)	(843)	(965)
Issuances	0	0	0	0
Settlements	278	118	722	7
Gross Transfers into Level 3	7	(53)	36	(177)
Gross Transfers out of Level 3	(36)	(41)	(85)	(80)
Balance, ending	(2,023)	(987)	(2,023)	(987)
Change in Unrealized Gains/(Losses) Related to Financial Instruments Still Held	(283)	(198)	(561)	(108)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Gross derivative assets	370,700		370,700		$ 631,100
Gross derivative liabilities	362,400		362,400		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	(135)	(313)	(359)	(335)
Total Realized/Unrealized Gains/(Losses)	0	(17)	(5)	12
Gains (Losses) in OCI	0	0	0	0
Purchases	0	0	0	0
Sales	0	0	0	0
Issuances	0	0	(12)	(14)
Settlements	135	10	171	17
Gross Transfers into Level 3	0	(19)	(58)	(19)
Gross Transfers out of Level 3	0	1	263	1
Balance, ending	0	(338)	0	(338)
Change in Unrealized Gains/(Losses) Related to Financial Instruments Still Held	0	(17)	(5)	(21)
Corporate securities, trading loans and other
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning	(22)	(26)	(27)	(21)
Total Realized/Unrealized Gains/(Losses)	1	2	13	4
Gains (Losses) in OCI	0	0	0	0
Purchases	0	0	4	1
Sales	(3)	(2)	(13)	(10)
Issuances	(1)	0	(2)	0
Settlements	0	0	0	0
Gross Transfers into Level 3	0	0	0	0
Gross Transfers out of Level 3	0	0	0	0
Balance, ending	(25)	(26)	(25)	(26)
Change in Unrealized Gains/(Losses) Related to Financial Instruments Still Held	0	1	(1)	3
Short-term borrowings
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning				(30)
Total Realized/Unrealized Gains/(Losses)				1
Gains (Losses) in OCI				0
Purchases				0
Sales				0
Issuances				0
Settlements				29
Gross Transfers into Level 3				0
Gross Transfers out of Level 3				0
Balance, ending		0		0
Change in Unrealized Gains/(Losses) Related to Financial Instruments Still Held				0
Accrued expenses and other liabilities
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning	(9)	(9)	(9)	(9)
Total Realized/Unrealized Gains/(Losses)	0	0	0	0
Gains (Losses) in OCI	0	0	0	0
Purchases	0	0	0	0
Sales	0	0	0	0
Issuances	0	0	0	0
Settlements	0	0	0	0
Gross Transfers into Level 3	0	0	0	0
Gross Transfers out of Level 3	0	0	0	0
Balance, ending	(9)	(9)	(9)	(9)
Change in Unrealized Gains/(Losses) Related to Financial Instruments Still Held	0	0	0	0
Long-term debt
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning	(1,646)	(2,156)	(1,514)	(1,513)
Total Realized/Unrealized Gains/(Losses)	(87)	(22)	(160)	(192)
Gains (Losses) in OCI	(7)	(23)	(18)	(41)
Purchases	63	15	81	44
Sales	0	0	0	0
Issuances	(129)	(3)	(279)	(326)
Settlements	115	363	398	496
Gross Transfers into Level 3	(244)	(206)	(530)	(751)
Gross Transfers out of Level 3	45	98	132	349
Balance, ending	(1,890)	(1,934)	(1,890)	(1,934)
Change in Unrealized Gains/(Losses) Related to Financial Instruments Still Held	(87)	(24)	(158)	(208)
Level 3 | Recurring
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Balance, beginning			(1,313)
Balance, ending	(2,023)		(2,023)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Gross derivative assets	3,878	4,900	3,878	4,900	3,931
Gross derivative liabilities	5,901	5,900	5,901	5,900	$ 5,244
Corporate securities, trading loans and other
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning	1,777	2,654	2,777	2,838
Total Realized/Unrealized Gains/(Losses)	77	57	225	118
Gains (Losses) in OCI	0	0	0	2
Purchases	35	226	353	925
Sales	(79)	(245)	(679)	(638)
Issuances	5	0	5	0
Settlements	(208)	(134)	(443)	(479)
Gross Transfers into Level 3	288	202	506	432
Gross Transfers out of Level 3	(153)	(198)	(1,002)	(636)
Balance, ending	1,742	2,562	1,742	2,562
Change in Unrealized Gains/(Losses) Related to Financial Instruments Still Held	35	20	72	11
Equity securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning	229	455	281	407
Total Realized/Unrealized Gains/(Losses)	8	11	23	93
Gains (Losses) in OCI	0	0	0	0
Purchases	3	10	45	53
Sales	(3)	(98)	(67)	(135)
Issuances	0	0	0	0
Settlements	0	0	(10)	(72)
Gross Transfers into Level 3	17	27	119	60
Gross Transfers out of Level 3	(10)	(39)	(147)	(40)
Balance, ending	244	366	244	366
Change in Unrealized Gains/(Losses) Related to Financial Instruments Still Held	10	5	11	(19)
Non-U.S. sovereign debt
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning	506	630	510	521
Total Realized/Unrealized Gains/(Losses)	33	20	64	112
Gains (Losses) in OCI	18	(7)	12	91
Purchases	0	0	26	3
Sales	0	0	(59)	(1)
Issuances	0	0	0	0
Settlements	(5)	(4)	(73)	(87)
Gross Transfers into Level 3	0	0	72	0
Gross Transfers out of Level 3	0	0	0	0
Balance, ending	552	639	552	639
Change in Unrealized Gains/(Losses) Related to Financial Instruments Still Held	33	19	60	110
Mortgage trading loans, ABS and other MBS
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning	1,232	1,286	1,211	1,868
Total Realized/Unrealized Gains/(Losses)	10	102	195	197
Gains (Losses) in OCI	(1)	0	(2)	(2)
Purchases	150	331	747	681
Sales	(157)	(441)	(846)	(1,264)
Issuances	0	0	0	0
Settlements	(46)	(103)	(169)	(270)
Gross Transfers into Level 3	83	15	187	91
Gross Transfers out of Level 3	(19)	(24)	(71)	(135)
Balance, ending	1,252	1,166	1,252	1,166
Change in Unrealized Gains/(Losses) Related to Financial Instruments Still Held	(2)	62	107	110
Trading Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning	3,744	5,025	4,779	5,634
Total Realized/Unrealized Gains/(Losses)	128	190	507	520
Gains (Losses) in OCI	17	(7)	10	91
Purchases	188	567	1,171	1,662
Sales	(239)	(784)	(1,651)	(2,038)
Issuances	5	0	5	0
Settlements	(259)	(241)	(695)	(908)
Gross Transfers into Level 3	388	244	884	583
Gross Transfers out of Level 3	(182)	(261)	(1,220)	(811)
Balance, ending	3,790	4,733	3,790	4,733
Change in Unrealized Gains/(Losses) Related to Financial Instruments Still Held	76	106	250	212
Non-agency residential MBS
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning		134		106
Total Realized/Unrealized Gains/(Losses)		0		0
Gains (Losses) in OCI		0		3
Purchases		189		385
Sales		0		(92)
Issuances		0		0
Settlements		(102)		(181)
Gross Transfers into Level 3		6		6
Gross Transfers out of Level 3		0		0
Balance, ending		227		227
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	139		229
Total Realized/Unrealized Gains/(Losses)	1		2
Gains (Losses) in OCI	4		16
Purchases	7		49
Sales	0		0
Issuances	0		0
Settlements	(115)		(260)
Gross Transfers into Level 3	0		0
Gross Transfers out of Level 3	0		0
Balance, ending	36		36
Change in Unrealized Gains/(Losses) Related to Financial Instruments Still Held	0		0
Other taxable securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning	483	717	594	757
Total Realized/Unrealized Gains/(Losses)	0	1	3	3
Gains (Losses) in OCI	1	(1)	6	(7)
Purchases	0	0	5	0
Sales	0	0	0	0
Issuances	0	0	0	0
Settlements	(1)	(30)	(31)	(66)
Gross Transfers into Level 3	0	0	0	0
Gross Transfers out of Level 3	0	0	(94)	0
Balance, ending	483	687	483	687
Change in Unrealized Gains/(Losses) Related to Financial Instruments Still Held	0	0	0	0
Tax-exempt securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning	518	559	542	569
Total Realized/Unrealized Gains/(Losses)	0	0	0	0
Gains (Losses) in OCI	1	2	1	(8)
Purchases	0	0	0	1
Sales	0	0	(56)	0
Issuances	0	0	0	0
Settlements	(7)	0	(10)	(1)
Gross Transfers into Level 3	0	10	35	10
Gross Transfers out of Level 3	(45)	0	(45)	0
Balance, ending	467	571	467	571
Change in Unrealized Gains/(Losses) Related to Financial Instruments Still Held	0	0	0	0
Available-for-sale Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning	1,140	1,410	1,365	1,432
Total Realized/Unrealized Gains/(Losses)	1	1	5	3
Gains (Losses) in OCI	6	1	23	(12)
Purchases	7	189	54	386
Sales	0	0	(56)	(92)
Issuances	0	0	0	0
Settlements	(123)	(132)	(301)	(248)
Gross Transfers into Level 3	0	16	35	16
Gross Transfers out of Level 3	(45)	0	(139)	0
Balance, ending	986	1,485	986	1,485
Change in Unrealized Gains/(Losses) Related to Financial Instruments Still Held	0	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	23	28	25	30
Total Realized/Unrealized Gains/(Losses)	0	(2)	(1)	(4)
Gains (Losses) in OCI	0	0	0	0
Purchases	0	0	0	0
Sales	0	0	0	0
Issuances	0	0	0	0
Settlements	(1)	0	(2)	0
Gross Transfers into Level 3	0	0	0	0
Gross Transfers out of Level 3	0	0	0	0
Balance, ending	22	26	22	26
Change in Unrealized Gains/(Losses) Related to Financial Instruments Still Held	0	0	0	0
Loans and leases
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning	667	1,459	720	1,620
Total Realized/Unrealized Gains/(Losses)	2	(9)	20	(13)
Gains (Losses) in OCI	0	0	0	0
Purchases	2	0	2	69
Sales	(24)	0	(24)	0
Issuances	0	0	0	50
Settlements	(29)	(54)	(93)	(143)
Gross Transfers into Level 3	0	0	0	6
Gross Transfers out of Level 3	0	(41)	(7)	(234)
Balance, ending	618	1,355	618	1,355
Change in Unrealized Gains/(Losses) Related to Financial Instruments Still Held	2	(8)	18	(3)
Mortgage servicing rights
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning	2,501	2,269	2,747	3,087
Total Realized/Unrealized Gains/(Losses)	54	313	40	(295)
Gains (Losses) in OCI	0	0	0	0
Purchases	0	0	0	0
Sales	(28)	0	(22)	0
Issuances	69	101	207	307
Settlements	(189)	(206)	(565)	(622)
Gross Transfers into Level 3	0	0	0	0
Gross Transfers out of Level 3	0	0	0	0
Balance, ending	2,407	2,477	2,407	2,477
Change in Unrealized Gains/(Losses) Related to Financial Instruments Still Held	(20)	262	(202)	(457)
Loans Held-for-Sale
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning	766	690	656	787
Total Realized/Unrealized Gains/(Losses)	38	13	109	97
Gains (Losses) in OCI	10	(4)	7	51
Purchases	0	0	2	20
Sales	(4)	(56)	(159)	(236)
Issuances	0	0	0	0
Settlements	(93)	(25)	(281)	(77)
Gross Transfers into Level 3	58	4	473	43
Gross Transfers out of Level 3	0	(35)	(32)	(98)
Balance, ending	775	587	775	587
Change in Unrealized Gains/(Losses) Related to Financial Instruments Still Held	27	10	60	76
Other assets
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning	294	348	239	374
Total Realized/Unrealized Gains/(Losses)	70	11	53	(27)
Gains (Losses) in OCI	(43)	0	(31)	0
Purchases	0	4	2	38
Sales	(52)	0	(52)	0
Issuances	0	0	0	0
Settlements	(2)	0	(8)	(24)
Gross Transfers into Level 3	0	0	64	2
Gross Transfers out of Level 3	0	0	0	0
Balance, ending	267	363	267	363
Change in Unrealized Gains/(Losses) Related to Financial Instruments Still Held	$ 28	$ 17	$ 21	$ (15)

Fair Value Measurements - Re111

Fair Value Measurements - Recurring Fair Value Inputs (Details) - USD ($)	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2016	Jun. 30, 2017	Sep. 30, 2016	Jun. 30, 2016	Dec. 31, 2015
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Net derivative asset (liability)	$ (2,023,000,000)	$ (1,313,000,000)	$ (1,803,000,000)	$ (987,000,000)	$ (648,000,000)	$ (441,000,000)
Recurring
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, fair value	653,738,000,000	614,410,000,000
Long-term debt	(211,705,000,000)	(185,699,000,000)
Recurring | Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, fair value	12,743,000,000	14,462,000,000
Long-term debt	(7,825,000,000)	(7,153,000,000)
Net derivative asset (liability)	$ (2,023,000,000)	$ (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	0 years
Equity correlation	3.00%	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	4 years	5 years
Equity correlation	100.00%	100.00%
Long-dated equity volatilities	76.00%	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)	$ 65	$ 73
Duration	3 years	3 years
Equity correlation	64.00%	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	$ 618,000,000	$ 720,000,000
Recurring | Level 3 | Loans Held-for-Sale
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, fair value	775,000,000	656,000,000
Recurring | Level 3 | Credit derivatives
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Net derivative asset (liability)	$ (325,000,000)	$ (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	12.00%	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	90.00%	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)	$ 76
Upfront points	0.73%	0.72%
Credit spreads		2.48%
Credit correlation	58.00%	44.00%
Recurring | Level 3 | Equity contracts
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Net derivative asset (liability)	$ (2,235,000,000)	$ (1,690,000,000)
Recurring | Level 3 | Equity contracts | Minimum | Industry standard derivative pricing
Fair Value Inputs [Abstract]
Equity correlation	3.00%	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	76.00%	76.00%
Recurring | Level 3 | Equity contracts | Weighted Average | Industry standard derivative pricing
Fair Value Inputs [Abstract]
Equity correlation	64.00%	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)	$ 2,000,000	$ 6,000,000
Recurring | Level 3 | Commodity contracts | Minimum | Discounted cash flow, Industry standard derivative pricing
Fair Value Inputs [Abstract]
Long-dated equity volatilities	25.00%	23.00%
Natural gas forward price	$ 2	$ 2
Correlation	68.00%	66.00%
Recurring | Level 3 | Commodity contracts | Maximum | Discounted cash flow, Industry standard derivative pricing
Fair Value Inputs [Abstract]
Long-dated equity volatilities	90.00%	96.00%
Natural gas forward price	$ 6	$ 6
Correlation	90.00%	95.00%
Recurring | Level 3 | Commodity contracts | Weighted Average | Discounted cash flow, Industry standard derivative pricing
Fair Value Inputs [Abstract]
Long-dated equity volatilities	49.00%	36.00%
Natural gas forward price	$ 3	$ 4
Correlation	85.00%	85.00%
Recurring | Level 3 | Interest rate contracts
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Net derivative asset (liability)	$ 535,000,000	$ 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	(10.00%)	(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)	90.00%	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)	53.00%	56.00%
Correlation (FX/IR)	1.00%	2.00%
Illiquid IR and long-dated inflation rates	6.00%	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	$ (1,890,000,000)	$ (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	1,300,000,000	1,200,000,000
Recurring | Level 3 | Corporate securities, trading loans and other
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, fair value	1,700,000,000	2,800,000,000
Recurring | Level 3 | Non-U.S. sovereign debt
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, fair value	552,000,000	510,000,000
Recurring | Level 3 | Other taxable securities
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, fair value	483,000,000	594,000,000
Recurring | Level 3 | Tax-exempt securities
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, fair value	467,000,000	542,000,000
Recurring | Level 3 | Instruments backed by residential real estate assets
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, fair value	$ 914,000,000	$ 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	54.00%
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	2.00%
Loss severity	18.00%
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	$ 617,000,000	$ 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	4,000,000	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	293,000,000	337,000,000
Recurring | Level 3 | Instruments backed by commercial real estate assets
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, fair value	$ 264,000,000	$ 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	6.00%
Price (in dollars per share)	$ 68
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	$ 46,000,000	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	218,000,000	178,000,000
Recurring | Level 3 | Commercial loans, debt securities and other
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, fair value	$ 3,754,000,000	$ 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)	$ 185	$ 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	4.00%	14.00%
Prepayment speed	15.00%	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	$ 19,000,000
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	771,000,000	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	913,000,000	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	1,498,000,000	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	552,000,000	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	$ 957,000,000	$ 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	$ 26,000,000	$ 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	464,000,000	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	467,000,000	542,000,000
Recurring | Level 3 | MSRs
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, fair value	$ 2,407,000,000	$ 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	Sep. 30, 2017USD ($)
Fair Value Disclosures [Abstract]
Impact of 10 percent decrease in prepayment speed	$ 88
Impact of 20 percent decrease in prepayment speed	183
Impact of 10 percent increase in prepayment speed	(81)
Impact of 20 percent increase in prepayment speed	(156)
Impact of 100 basis points decrease in option adjusted spread	74
Impact of 200 basis points decrease in option adjusted spread	154
Impact of 100 basis points increase in option adjusted spread	(69)
Impact of 200 basis points increase in option adjusted spread	$ (135)

Fair Value Measurements - Nonre

Fair Value Measurements - Nonrecurring Fair Value (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis
Loans held-for-sale, measured at fair value	$ 3,128		$ 3,128		$ 4,026
Loans and leases, measured at fair value	6,285		6,285		7,085
Other assets, measured at fair value	19,341		19,341		$ 13,802
Nonrecurring
Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis
Gains (Losses) on loans held-for-sale	0	$ (1)	(4)	$ (44)
Gains (Losses) on loans and leases	(152)	(143)	(307)	(399)
Gains (Losses) on foreclosed properties	(21)	(23)	(35)	(41)
Gains (Losses) on other assets	(1)	(18)	(121)	(44)
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	879	1,300	879	1,300
Nonrecurring | Level 2
Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis
Loans held-for-sale, measured at fair value	70	191	70	191
Loans and leases, measured at fair value	0	0	0	0
Foreclosed properties, measured at fair value	0	0	0	0
Other assets, measured at fair value	353	173	353	173
Loss on loans and leases written down to zero	71	48	132	112
Nonrecurring | Level 3
Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis
Loans held-for-sale, measured at fair value	16	48	16	48
Loans and leases, measured at fair value	813	1,333	813	1,333
Foreclosed properties, measured at fair value	79	113	79	113
Other assets, measured at fair value	$ 0	$ 0	$ 0	$ 0

Fair Value Measurements - No114

Fair Value Measurements - Nonrecurring Fair Value Inputs (Details) - Nonrecurring - Level 3 - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Market Comparables | Minimum
Fair Value Inputs [Abstract]
OREO discount	8.00%	8.00%
Costs to sell	7.00%	7.00%
Market Comparables | Maximum
Fair Value Inputs [Abstract]
OREO discount	54.00%	56.00%
Costs to sell	45.00%	45.00%
Instruments backed by residential real estate assets
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, fair value	$ 813	$ 1,416
Instruments backed by residential real estate assets | Market Comparables | Weighted Average
Fair Value Inputs [Abstract]
OREO discount	21.00%	21.00%
Costs to sell	9.00%	9.00%

Fair Value Option - Elections (

Fair Value Option - Elections (Details) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Federal funds sold and securities borrowed or purchased under agreements to resell
Fair Value Carrying Amount
Assets	$ 56,780	$ 49,750
Contractual Principal Outstanding
Assets	56,720	49,615
Fair Value Carrying Amount Less Unpaid Principal
Assets	60	135
Loans reported as trading account assets
Fair Value Carrying Amount
Assets	5,734	6,215
Contractual Principal Outstanding
Assets	10,749	11,557
Fair Value Carrying Amount Less Unpaid Principal
Assets	(5,015)	(5,342)
Trading inventory – other
Fair Value Carrying Amount
Assets	11,096	8,206
Consumer and commercial loans
Fair Value Carrying Amount
Assets	6,285	7,085
Contractual Principal Outstanding
Assets	6,332	7,190
Fair Value Carrying Amount Less Unpaid Principal
Assets	(47)	(105)
Loans held-for-sale
Fair Value Carrying Amount
Assets	3,128	4,026
Contractual Principal Outstanding
Assets	4,751	5,595
Fair Value Carrying Amount Less Unpaid Principal
Assets	(1,623)	(1,569)
Customer receivables and other assets
Fair Value Carrying Amount
Assets	233	253
Contractual Principal Outstanding
Assets	230	250
Fair Value Carrying Amount Less Unpaid Principal
Assets	3	3
Long-term deposits
Fair Value Carrying Amount
Liabilities	468	731
Contractual Principal Outstanding
Liabilities	433	672
Fair Value Carrying Amount Less Unpaid Principal
Liabilities	35	59
Federal funds purchased and securities loaned or sold under agreements to repurchase
Fair Value Carrying Amount
Liabilities	38,852	35,766
Contractual Principal Outstanding
Liabilities	38,861	35,929
Fair Value Carrying Amount Less Unpaid Principal
Liabilities	(9)	(163)
Short-term borrowings
Fair Value Carrying Amount
Liabilities	1,904	2,024
Contractual Principal Outstanding
Liabilities	1,904	2,024
Fair Value Carrying Amount Less Unpaid Principal
Liabilities	0	0
Unfunded loan commitments
Fair Value Carrying Amount
Liabilities	101	173
Long-term debt
Fair Value Carrying Amount
Liabilities	29,897	30,037
Contractual Principal Outstanding
Liabilities	30,497	29,862
Fair Value Carrying Amount Less Unpaid Principal
Liabilities	(600)	175
Structured liabilities
Fair Value Carrying Amount
Liabilities	29,500	29,700
Contractual Principal Outstanding
Liabilities	$ 30,100	$ 29,500

Fair Value Option - Gains (Loss

Fair Value Option - Gains (Losses) Relating to Assets and Liabilities (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (losses) relating to assets and liabilities accounted for under the fair value option	$ 951	$ 1,150	$ 2,915	$ 990
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	75	125	272	251
Trading inventory – other
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (losses) relating to assets and liabilities accounted for under the fair value option	1,217	907	2,890	551
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	92	139	275	560
Unfunded loan commitments
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (losses) relating to assets and liabilities accounted for under the fair value option	21	133	55	444
Long-term debt
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (losses) relating to assets and liabilities accounted for under the fair value option	(454)	(162)	(580)	(795)
Other
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (losses) relating to assets and liabilities accounted for under the fair value option	0	8	3	(21)
Trading Account Profits
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (losses) relating to assets and liabilities accounted for under the fair value option	879	867	2,650	87
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	75	125	272	251
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	1,217	907	2,890	551
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	5	0	10
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	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	(416)	(138)	(471)	(718)
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	3	(32)	(41)	(7)
Mortgage Banking Income (Loss)
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (losses) relating to assets and liabilities accounted for under the fair value option	73	132	182	493
Mortgage Banking Income (Loss) | 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	0
Mortgage Banking Income (Loss) | 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	0
Mortgage Banking Income (Loss) | 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	73	132	182	493
Mortgage Banking Income (Loss) | 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	0
Mortgage Banking Income (Loss) | 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	0
Mortgage Banking Income (Loss) | 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	0
Other Income
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (losses) relating to assets and liabilities accounted for under the fair value option	(1)	151	83	410
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	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	0
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	19	2	93	57
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	21	133	55	444
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	(38)	(24)	(109)	(77)
Other Income | Other
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (losses) relating to assets and liabilities accounted for under the fair value option	$ (3)	$ 40	$ 44	$ (14)

Fair Value Option - Gains (L117

Fair Value Option - Gains (Losses) Related to Borrower-specific Credit Risk (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
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	$ 5	$ 0	$ 25	$ 5
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	(10)	14	31	(25)
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	$ (2)	$ (10)	$ (3)	$ (6)

Fair Value of Financial Inst118

Fair Value of Financial Instruments (Details) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Financial assets
Loans held-for-sale	$ 3,128	$ 4,026
Financial liabilities
Long-term debt	29,897	30,037
Carrying Value
Financial assets
Loans	895,155	873,209
Loans held-for-sale	13,243	9,066
Financial liabilities
Deposits	1,284,417	1,260,934
Long-term debt	228,666	216,823
Commercial unfunded lending commitments	863	937
Estimate of Fair Value Measurement
Financial assets
Loans	909,642	887,122
Loans held-for-sale	13,273	9,066
Financial liabilities
Deposits	1,284,397	1,261,086
Long-term debt	236,768	221,585
Commercial unfunded lending commitments	3,800	4,900
Estimate of Fair Value Measurement | Level 2
Financial assets
Loans	69,711	71,793
Loans held-for-sale	12,261	8,082
Financial liabilities
Deposits	1,284,397	1,261,086
Long-term debt	234,878	220,071
Estimate of Fair Value Measurement | Level 3
Financial assets
Loans	839,931	815,329
Loans held-for-sale	1,012	984
Financial liabilities
Deposits	0	0
Long-term debt	$ 1,890	$ 1,514

Business Segment Information -

Business Segment Information - Narrative (Details)	9 Months Ended
	Sep. 30, 2017business_segment
Segment Reporting [Abstract]
Number of operating segments	4

Business Segment Information120

Business Segment Information - Results of Business Segments and All Other (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Segment Reporting Information [Line Items]
Net interest income (FTE basis)	$ 11,401	$ 10,429	$ 33,879	$ 31,470
Noninterest income	10,678	11,434	33,711	32,907
Total revenue, net of interest expense (FTE basis)	22,079	21,863	67,590	64,377
Provision for credit losses	834	850	2,395	2,823
Noninterest expense	13,139	13,481	41,713	41,790
Income before income taxes (FTE basis)	8,106	7,532	23,482	19,764
Income tax expense (FTE basis)	2,519	2,577	7,770	6,554
Net income	5,587	4,955	15,712	13,210
Year-end total assets	2,283,896	2,195,314	2,283,896	2,195,314	$ 2,187,702
Operating Segments
Segment Reporting Information [Line Items]
Total revenue, net of interest expense (FTE basis)	22,280	21,451	67,009	63,407
Net income	5,370	5,136	16,512	14,694
Year-end total assets	2,071,155	1,970,069	2,071,155	1,970,069
Operating Segments | Consumer Banking
Segment Reporting Information [Line Items]
Net interest income (FTE basis)	6,211	5,289	17,953	15,825
Noninterest income	2,563	2,679	7,614	7,795
Total revenue, net of interest expense (FTE basis)	8,774	7,968	25,567	23,620
Provision for credit losses	967	698	2,639	1,955
Noninterest expense	4,459	4,371	13,280	13,324
Income before income taxes (FTE basis)	3,348	2,899	9,648	8,341
Income tax expense (FTE basis)	1,261	1,086	3,638	3,088
Net income	2,087	1,813	6,010	5,253
Year-end total assets	742,513	687,241	742,513	687,241
Operating Segments | Global Wealth & Investment Management
Segment Reporting Information [Line Items]
Net interest income (FTE basis)	1,496	1,394	4,653	4,310
Noninterest income	3,124	2,985	9,254	8,963
Total revenue, net of interest expense (FTE basis)	4,620	4,379	13,907	13,273
Provision for credit losses	16	7	50	46
Noninterest expense	3,370	3,255	10,091	9,816
Income before income taxes (FTE basis)	1,234	1,117	3,766	3,411
Income tax expense (FTE basis)	465	419	1,420	1,270
Net income	769	698	2,346	2,141
Year-end total assets	276,187	289,794	276,187	289,794
Operating Segments | Global Banking
Segment Reporting Information [Line Items]
Net interest income (FTE basis)	2,743	2,470	8,229	7,440
Noninterest income	2,243	2,276	6,751	6,456
Total revenue, net of interest expense (FTE basis)	4,986	4,746	14,980	13,896
Provision for credit losses	48	118	80	870
Noninterest expense	2,118	2,152	6,435	6,450
Income before income taxes (FTE basis)	2,820	2,476	8,465	6,576
Income tax expense (FTE basis)	1,062	925	3,192	2,435
Net income	1,758	1,551	5,273	4,141
Year-end total assets	423,185	397,869	423,185	397,869
Operating Segments | Global Markets
Segment Reporting Information [Line Items]
Net interest income (FTE basis)	899	1,119	2,812	3,391
Noninterest income	3,001	3,239	9,743	9,227
Total revenue, net of interest expense (FTE basis)	3,900	4,358	12,555	12,618
Provision for credit losses	(6)	19	2	23
Noninterest expense	2,710	2,656	8,117	7,690
Income before income taxes (FTE basis)	1,196	1,683	4,436	4,905
Income tax expense (FTE basis)	440	609	1,553	1,746
Net income	756	1,074	2,883	3,159
Year-end total assets	629,270	595,165	629,270	595,165
All Other
Segment Reporting Information [Line Items]
Net interest income (FTE basis)	52	157	232	504
Noninterest income	(253)	255	349	466
Total revenue, net of interest expense (FTE basis)	(201)	412	581	970
Provision for credit losses	(191)	8	(376)	(71)
Noninterest expense	482	1,047	3,790	4,510
Income before income taxes (FTE basis)	(492)	(643)	(2,833)	(3,469)
Income tax expense (FTE basis)	(709)	(462)	(2,033)	(1,985)
Net income	217	(181)	(800)	(1,484)
Year-end total assets	$ 212,741	$ 225,245	$ 212,741	$ 225,245

Business Segment Information121

Business Segment Information - Business Segment Reconciliations (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Segments’ total revenue, net of interest expense (FTE basis)
Total revenue, net of interest expense (FTE basis)	$ 22,079	$ 21,863	$ 67,590	$ 64,377
Total revenue, net of interest expense	21,839	21,635	66,916	63,711
Net income	5,587	4,955	15,712	13,210
Operating Segments
Segments’ total revenue, net of interest expense (FTE basis)
Total revenue, net of interest expense (FTE basis)	22,280	21,451	67,009	63,407
Net income	5,370	5,136	16,512	14,694
ALM activities
Segments’ total revenue, net of interest expense (FTE basis)
Total revenue, net of interest expense	273	(43)	332	(12)
Net income	57	(136)	(208)	(453)
Liquidating businesses and other
Segments’ total revenue, net of interest expense (FTE basis)
Total revenue, net of interest expense	(474)	455	249	982
Net income	160	(45)	(592)	(1,031)
FTE basis adjustment
Segments’ total revenue, net of interest expense (FTE basis)
Total revenue, net of interest expense	$ (240)	$ (228)	$ (674)	$ (666)

Business Segment Information122

Business Segment Information - Segments' Total Assets (Details) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2016
Segments’ total assets
Total assets	$ 2,283,896	$ 2,187,702	$ 2,195,314
Operating Segments
Segments’ total assets
Total assets	2,071,155		1,970,069
ALM activities
Segments’ total assets
Total assets	635,305		616,730
Liquidating businesses and other
Segments’ total assets
Total assets	92,443		116,989
Elimination of segment asset allocations to match liabilities
Segments’ total assets
Total assets	$ (515,007)		$ (508,474)