Wells Fargo & Company (WFC) 10-Q 6 Nov 18 2018 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2018	Oct. 24, 2018
Document and Entity Information [Abstract]
Entity Registrant Name	WELLS FARGO & COMPANY/MN
Entity Central Index Key	72,971
Document Type	10-Q
Document Period End Date	Sep. 30, 2018
Amendment Flag	false
Entity Emerging Growth Company	false
Entity Small Business	false
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q3
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		4,707,244,168

Consolidated Statement of Incom

Consolidated Statement of Income (Unaudited) - USD ($) shares in Millions, $ in Millions		3 Months Ended			9 Months Ended
		Sep. 30, 2018	Sep. 30, 2017		Sep. 30, 2018	Sep. 30, 2017
Interest income
Debt securities (1)(2)		$ 3,595	$ 3,253	[1],[2]	$ 10,603	$ 9,652	[1],[2]
Mortgage loans held for sale (2)		210	217	[2]	587	590	[2]
Loans held for sale (1)		35	15	[1]	107	38	[1]
Loans		11,116	10,522		32,607	31,021
Equity securities (1)		280	186	[1]	732	560	[1]
Other interest income (1)		1,128	851	[1]	3,090	2,090	[1]
Total interest income (2)		16,364	15,044	[2]	47,726	43,951	[2]
Interest expense
Deposits (2)		1,499	869	[2]	3,857	2,082	[2]
Short-term borrowings		462	226		1,171	503
Long-term debt (2)		1,667	1,391	[2]	4,901	3,813	[2]
Other interest expense		164	109		446	309
Total interest expense (2)		3,792	2,595	[2]	10,375	6,707	[2]
Net interest income (2)		12,572	12,449	[2]	37,351	37,244	[2]
Provision for credit losses		580	717		1,223	1,877
Net interest income after provision for credit losses		11,992	11,732		36,128	35,367
Noninterest income
Mortgage banking		846	1,046		2,550	3,422
Insurance		104	269		320	826
Net gains from trading activities (1)		158	120	[1]	592	543	[1]
Net gains on debt securities (3)	[3]	57	166		99	322
Net gains from equity securities (1)(4)	[4]	416	363	[1]	1,494	1,207	[1]
Lease income		453	475		1,351	1,449
Other (2)		633	199	[2]	1,720	1,045	[2]
Total noninterest income (2)		9,369	9,400	[2]	28,077	29,095	[2]
Noninterest expense
Salaries		4,461	4,356		13,289	12,960
Commission and incentive compensation		2,427	2,553		7,837	7,777
Employee benefits		1,377	1,279		4,220	4,273
Equipment		634	523		1,801	1,629
Net occupancy		718	716		2,153	2,134
Core deposit and other intangibles		264	288		794	864
FDIC and other deposit assessments		336	314		957	975
Other		3,546	4,322		11,736	11,072
Total noninterest expense		13,763	14,351		42,787	41,684
Income before income tax expense (2)		7,598	6,781	[2]	21,418	22,778	[2]
Income tax expense (2)		1,512	2,181	[2]	4,696	6,559	[2]
Net income before noncontrolling interests (2)		6,086	4,600	[2],[5]	16,722	16,219	[2],[6],[7]
Less: Net income from noncontrolling interests		79	58		393	187
Wells Fargo net income (2)		6,007	4,542	[2],[8]	16,329	16,032	[2],[8]
Less: Preferred stock dividends and other		554	411		1,351	1,218
Wells Fargo net income applicable to common stock (2)		$ 5,453	$ 4,131	[2]	$ 14,978	$ 14,814	[2]
Per share information
Earnings per common share (in dollars per share)		$ 1.14	$ 0.83	[2]	$ 3.09	$ 2.97	[2]
Diluted earnings per common share (in dollars per share)		$ 1.13	$ 0.83	[2]	$ 3.07	$ 2.94	[2]
Average common shares outstanding (in shares)		4,784	4,948.6		4,844.8	4,982.1
Diluted average common shares outstanding (in shares)		4,823.2	4,996.8		4,885	5,035.4
Service charges on deposit accounts
Noninterest income
Fee income		$ 1,204	$ 1,276		$ 3,540	$ 3,865
Trust and investment fees
Noninterest income
Fee income		3,631	3,609		10,989	10,808
Card fees
Noninterest income
Fee income		1,017	1,000		2,926	2,964
Other fees
Noninterest income
Fee income		$ 850	$ 877		$ 2,496	$ 2,644
[1]	(1)Financial information for the prior periods has been revised to reflect the impact of the adoption in first quarter 2018 of Accounting Standards Update (ASU) 2016-01 – Financial Instruments – Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities. See Note 1 (Summary of Significant Accounting Policies) for more information.
[2]	(2)Financial information for the prior period has been revised to reflect the impact of the adoption of ASU 2017-12 – Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities, effective January 1, 2017.
[3]	(3)Total other-than-temporary impairment (OTTI) losses (reversal of losses) were $0 million and $5 million for third quarter 2018 and 2017, respectively. Of total OTTI, losses of $5 million and $7 million were recognized in earnings, and losses (reversal of losses) of $(5) million and $(2) million were recognized as non-credit-related OTTI in other comprehensive income for third quarter 2018 and 2017, respectively. Total OTTI losses were $14 million and $54 million for the first nine months of 2018 and 2017, respectively. Of total OTTI, losses of $23 million and $107 million were recognized in earnings, and losses (reversal of losses) of $(9) million and $(53) million were recognized as non-credit-related OTTI in other comprehensive income for the first nine months of 2018 and 2017, respectively.
[4]	(4)Includes OTTI losses of $45 million and $84 million for third quarter 2018 and 2017, respectively, and $302 million and $186 million for the first nine months of 2018 and 2017, respectively.
[5]	(3)Financial information for the prior period has been revised to reflect the impact of the adoption of ASU 2017-12 – Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities, effective January 1, 2017.
[6]	(2)Financial information for the prior period has been revised to reflect the impact of the adoption of ASU 2017-12 – Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities, effective January 1, 2017.
[7]	(5)Financial information for the prior period has been revised to reflect the impact of the adoption of ASU 2017-12 – Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities, effective January 1, 2017.
[8]	(1)Financial information for the prior period has been revised to reflect the impact of the adoption of ASU 2017-12 – Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities, effective January 1, 2017.

Consolidated Statement of Inc_2

Consolidated Statement of Income (Unaudited) (Parenthetical) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Noninterest income
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net, Available-for-sale Equity Securities and Nonmarketable Equity Securities	$ 45	$ 84	$ 302	$ 186
Debt securities [Member]
Noninterest income
Total OTTI losses (reversal of losses) recorded on debt securities	0	5	14	54
Total recorded as part of gross realized losses	5	7	23	107
Total reversal of losses recognized in OCI as non-credit-related impairment	$ (5)	$ (2)	$ (9)	$ (53)

Consolidated Statement of Compr

Consolidated Statement of Comprehensive Income (Unaudited) - USD ($) $ in Millions		3 Months Ended			9 Months Ended
		Sep. 30, 2018	Sep. 30, 2017		Sep. 30, 2018	Sep. 30, 2017
Statement of Comprehensive Income [Abstract]
Wells Fargo net income (1)		$ 6,007	$ 4,542	[1],[2]	$ 16,329	$ 16,032	[1],[2]
Debt securities (2):
Net unrealized gains (losses) arising during the period	[3]	(1,468)	891		(5,528)	2,825
Reclassification of net (gains) losses to net income	[3]	51	(200)		168	(522)
Derivatives and hedging activities (1):
Net unrealized gains (losses) arising during the period		(24)	104	[1]	(416)	18	[1]
Reclassification of net (gains) losses to net income		79	(105)	[1]	216	(460)	[1]
Defined benefit plans adjustments:
Net actuarial and prior service gains arising during the period		0	11		6	4
Amortization of net actuarial loss, settlements and other to net income		29	41		90	120
Foreign currency translation adjustments:
Net unrealized gains (losses) arising during the period		(9)	39		(94)	86
Other comprehensive income (loss), before tax (1)		(1,342)	781	[1]	(5,558)	2,071	[1]
Income tax (expense) benefit related to other comprehensive income (1)		330	(289)	[1]	1,346	(753)	[1]
Other comprehensive income (loss), net of tax (1)		(1,012)	492	[1],[4]	(4,212)	1,318	[1],[5]
Less: Other comprehensive loss from noncontrolling interests		0	(34)		(1)	(29)
Wells Fargo other comprehensive income (loss), net of tax (1)		(1,012)	526	[1]	(4,211)	1,347	[1]
Wells Fargo comprehensive income (1)		4,995	5,068	[1]	12,118	17,379	[1]
Comprehensive income from noncontrolling interests		79	24		392	158
Total comprehensive income (1)		$ 5,074	$ 5,092	[1]	$ 12,510	$ 17,537	[1]
[1]	(1)Financial information for the prior period has been revised to reflect the impact of the adoption of ASU 2017-12 – Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities, effective January 1, 2017.
[2]	(2)Financial information for the prior period has been revised to reflect the impact of the adoption of ASU 2017-12 – Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities, effective January 1, 2017.
[3]	(2)The quarter and nine months ended September 30, 2017, includes net unrealized gains (losses) arising during the period from equity securities of $(13) million and $113 million and reclassification of net (gains) losses to net income related to equity securities of $(106) million and $(323) million, respectively. With the adoption in first quarter 2018 of ASU 2016-01, the quarter and nine months ended September 30, 2018, reflects net unrealized gains (losses) arising during the period and reclassification of net (gains) losses to net income from only debt securities.
[4]	(3)Financial information for the prior period has been revised to reflect the impact of the adoption of ASU 2017-12 – Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities, effective January 1, 2017.
[5]	(5)Financial information for the prior period has been revised to reflect the impact of the adoption of ASU 2017-12 – Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities, effective January 1, 2017.

Consolidated Statement of Com_2

Consolidated Statement of Comprehensive Income (Unaudited) (Parenthetical) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Net unrealized gains (losses) arising during the period, Before tax	[1]	$ (1,468)	$ 891	$ (5,528)	$ 2,825
Reclassification of net (gains) losses to net income, Before tax	[1]	$ 51	(200)	$ 168	(522)
Accounting Standards Update 2016-01 [Member]
Net unrealized gains (losses) arising during the period, Before tax			(13)		113
Reclassification of net (gains) losses to net income, Before tax			$ (106)		$ (323)
[1]	(2)The quarter and nine months ended September 30, 2017, includes net unrealized gains (losses) arising during the period from equity securities of $(13) million and $113 million and reclassification of net (gains) losses to net income related to equity securities of $(106) million and $(323) million, respectively. With the adoption in first quarter 2018 of ASU 2016-01, the quarter and nine months ended September 30, 2018, reflects net unrealized gains (losses) arising during the period and reclassification of net (gains) losses to net income from only debt securities.

Consolidated Balance Sheet (Una

Consolidated Balance Sheet (Unaudited) - USD ($) $ in Millions		Sep. 30, 2018	Dec. 31, 2017
Assets
Cash and due from banks		$ 18,791	$ 23,367
Interest-earning deposits with banks (1)		140,732	192,580	[1]
Total cash, cash equivalents, and restricted cash (1)		159,523	215,947	[1]
Federal funds sold and securities purchased under resale agreements (1)		83,471	80,025	[1]
Debt securities:
Trading, at fair value (2)		65,188	57,624	[2]
Debt Securities, Available-for-sale		262,964	276,407	[2]
Held-to-maturity, at cost (fair value $139,036 and $138,985)		144,131	139,335
Mortgage loans held for sale (includes $13,885 and $16,116 carried at fair value) (3)	[3]	19,225	20,070
Loans held for sale (includes $1,266 and $1,023 carried at fair value) (2)		1,765	1,131	[2]
Loans (includes $286 and $376 carried at fair value) (3)	[3]	942,300	956,770
Allowance for loan losses		(10,021)	(11,004)
Net loans		932,279	945,766
Mortgage servicing rights:
Measured at fair value		15,980	13,625
Amortized		1,414	1,424
Premises and equipment, net		8,802	8,847
Goodwill		26,425	26,587
Derivative assets		11,811	12,228
Equity securities (includes $38,322 and $39,227 carried at fair value) (2)		61,755	62,497	[2]
Other assets (2)		78,248	90,244	[2]
Total assets	[4]	1,872,981	1,951,757
Liabilities
Noninterest-bearing deposits		352,869	373,722
Interest-bearing deposits		913,725	962,269
Total deposits		1,266,594	1,335,991
Short-term borrowings		105,451	103,256
Derivative liabilities		8,586	8,796
Accrued expenses and other liabilities		71,348	70,615
Long-term debt		221,323	225,020
Total liabilities	[5]	1,673,302	1,743,678
Wells Fargo stockholders' equity:
Preferred stock		23,482	25,358
Common stock – $1-2/3 par value, authorized 9,000,000,000 shares; issued 5,481,811,474 shares		9,136	9,136
Additional paid-in capital		60,738	60,893
Retained earnings		154,576	145,263
Cumulative other comprehensive income (loss)		(6,873)	(2,144)
Treasury stock – 770,250,428 shares and 590,194,846 shares		(40,538)	(29,892)
Unearned ESOP shares		(1,780)	(1,678)
Total Wells Fargo stockholders' equity		198,741	206,936
Noncontrolling interests		938	1,143
Total equity		199,679	208,079
Total liabilities and equity		$ 1,872,981	$ 1,951,757
[1]	(1)Financial information has been revised to reflect the impact of the adoption in first quarter 2018 of ASU 2016-18 – Statement of Cash Flows (Topic 230): Restricted Cash in which we changed the presentation of our cash and cash equivalents to include both cash and due from banks as well as interest-earning deposits with banks, which are inclusive of any restricted cash. See Note 1 (Summary of Significant Accounting Policies) for more information.
[2]	(2)Financial information for the prior period has been revised to reflect the impact of the adoption in first quarter 2018 of ASU 2016-01 – Financial Instruments – Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities. See Note 1 (Summary of Significant Accounting Policies) for more information.
[3]	(3)Parenthetical amounts represent assets and liabilities for which we are required to carry at fair value or have elected the fair value option.
[4]	(4)Our consolidated assets at September 30, 2018, and December 31, 2017, include the following assets of certain variable interest entities (VIEs) that can only be used to settle the liabilities of those VIEs: Cash and due from banks, $112 million and $116 million; Interest-earning deposits with banks, $8 million and $371 million; Debt securities, $0 million at both period ends; Net loans, $12.7 billion and $12.5 billion; Derivative assets, $0 million at both period ends; Equity securities, $61 million and $306 million; Other assets, $210 million and $342 million; and Total assets, $13.1 billion and $13.6 billion, respectively.
[5]	(5)Our consolidated liabilities at September 30, 2018, and December 31, 2017, include the following VIE liabilities for which the VIE creditors do not have recourse to Wells Fargo: Derivative liabilities, $0 million and $5 million; Accrued expenses and other liabilities, $154 million and $132 million; Long-term debt, $871 million and $1.5 billion; and Total liabilities, $1.0 billion and $1.6 billion, respectively.

Consolidated Balance Sheet (Par

Consolidated Balance Sheet (Parenthetical) - USD ($) $ in Millions		Sep. 30, 2018	Dec. 31, 2017
Assets
Held-to-maturity, at fair value		$ 139,036	$ 138,985
Mortgage loans held for sale, carried at fair value		13,885	16,116
Loans held for sale, carried at fair value		1,266	1,023
Loans, carried at fair value		286	376
Equity securities, carried at fair value		38,322	39,227
Cash and due from banks		18,791	23,367
Net loans		932,279	945,766
Derivative assets		11,811	12,228
Other assets		78,248	90,244	[1]
Equity securities (includes $38,322 and $39,227 carried at fair value) (2)		61,755	62,497	[1]
Assets	[2]	1,872,981	1,951,757
Liabilities
Derivative liabilities		8,586	8,796
Accrued expenses and other liabilities		71,348	70,615
Long-term debt		221,323	225,020
Total liabilities	[3]	$ 1,673,302	$ 1,743,678
Wells Fargo stockholders' equity:
Common stock, par value		$ 1.666602371	$ 1.666602371
Common stock, shares issued		5,481,811,474	5,481,811,474
Common stock, shares authorized		9,000,000,000	9,000,000,000
Treasury stock, shares		770,250,428	590,194,846
Interest-earning deposits with banks (1)		$ 140,732	$ 192,580	[4]
VIEs that we consolidate [Member]
Assets
Cash and due from banks		112	116
Debt securities		0	0
Net loans		12,700	12,500
Derivative assets		0	0
Other assets		210	342
Equity securities (includes $38,322 and $39,227 carried at fair value) (2)		61	306
Assets		13,140	13,617
Liabilities
Derivative liabilities		0	5
Accrued expenses and other liabilities		154	132
Long-term debt		871	1,479
Total liabilities		1,025	1,616
Wells Fargo stockholders' equity:
Interest-earning deposits with banks (1)		$ 8	$ 371
[1]	(2)Financial information for the prior period has been revised to reflect the impact of the adoption in first quarter 2018 of ASU 2016-01 – Financial Instruments – Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities. See Note 1 (Summary of Significant Accounting Policies) for more information.
[2]	(4)Our consolidated assets at September 30, 2018, and December 31, 2017, include the following assets of certain variable interest entities (VIEs) that can only be used to settle the liabilities of those VIEs: Cash and due from banks, $112 million and $116 million; Interest-earning deposits with banks, $8 million and $371 million; Debt securities, $0 million at both period ends; Net loans, $12.7 billion and $12.5 billion; Derivative assets, $0 million at both period ends; Equity securities, $61 million and $306 million; Other assets, $210 million and $342 million; and Total assets, $13.1 billion and $13.6 billion, respectively.
[3]	(5)Our consolidated liabilities at September 30, 2018, and December 31, 2017, include the following VIE liabilities for which the VIE creditors do not have recourse to Wells Fargo: Derivative liabilities, $0 million and $5 million; Accrued expenses and other liabilities, $154 million and $132 million; Long-term debt, $871 million and $1.5 billion; and Total liabilities, $1.0 billion and $1.6 billion, respectively.
[4]	(1)Financial information has been revised to reflect the impact of the adoption in first quarter 2018 of ASU 2016-18 – Statement of Cash Flows (Topic 230): Restricted Cash in which we changed the presentation of our cash and cash equivalents to include both cash and due from banks as well as interest-earning deposits with banks, which are inclusive of any restricted cash. See Note 1 (Summary of Significant Accounting Policies) for more information.

Consolidated Statement of Chang

Consolidated Statement of Changes in Equity (Unaudited) - USD ($) $ in Millions		Total		Total Wells Fargo stockholders' equity [Member]		Preferred stock [Member]	Common stock [Member]	Additional paid-in capital [Member]	Retained Earnings [Member]		Cumulative other comprehensive income [Member]		Treasury stock [Member]	Unearned ESOP Shares [Member]	Noncontrolling interests [Member]
Stockholders' Equity Period Increase (Decrease)
Cumulative Effect of New Accounting Principle | Accounting Standards Update 2017-12 [Member]	[1]	$ (213)		$ (213)					$ (381)		$ 168
Beginning balance, adjusted balance		200,284		199,368		$ 24,551	$ 9,136	$ 60,234	132,694		(2,969)		$ (22,713)	$ (1,565)	$ 916
Balance, beginning of period at Dec. 31, 2016		200,497		199,581		$ 24,551	$ 9,136	60,234	133,075		(3,137)		(22,713)	(1,565)	916
Beginning balance, shares at Dec. 31, 2016						11,532,712	5,016,109,326
Stockholders' Equity Period Increase (Decrease)
Net income		16,032	[2],[3]	16,032	[4]				16,032	[4]
Net income attributable to noncontrolling interests		(187)													187	[4]
Net income	[3],[4],[5]	16,219
Other comprehensive income (loss) attributable to parent, net of tax		1,347	[2]	1,347	[4]						1,347	[4]
Other comprehensive income (loss) attributable to noncontrolling interest, net of tax		29													(29)	[4]
Other comprehensive income (loss), net of tax		1,318	[2],[4]								1,318
Noncontrolling interests, adjustments to Additional Paid in Capital				1				1
Noncontrolling interests															(179)
Total change in noncontrolling interests		(178)
Common stock issued		1,912		1,912				(87)	(184)				2,183
Common stock, shares issued							45,738,310
Common stock repurchased		(7,063)		(7,063)				750					(7,813)
Common stock repurchased, shares	[6]						(145,143,692)
Preferred stock redeemed, Value	[7]	0		0		$ 0		0
Preferred stock redeemed, Shares	[7]					0
Preferred stock issued to ESOP		0		0		$ 950		31						(981)
Preferred stock issued to ESOP, shares						950,000
Preferred stock released by ESOP		615		615				(27)						642
Preferred stock converted to common shares		0		0		$ (615)		61					554
Preferred stock converted to common shares, shares						(614,529)	11,167,204
Common stock warrant repurchased/exercised		(87)		(87)				(87)
Preferred stock issued		677		677		$ 690		(13)
Preferred stock, shares issued						27,600
Common stock dividends		(5,738)		(5,738)				37	(5,775)
Preferred stock dividends		(1,218)		(1,218)					(1,218)
Stock incentive compensation expense		669		669				669
Net change in deferred compensation and related plans		(793)		(793)				(810)					17
Net change	[4]	6,333		6,354		$ 1,025	$ 0	525	8,855		1,347		(5,059)	(339)	(21)
Net change, shares	[4]					363,071	(88,238,178)
Balance, end of period at Sep. 30, 2017	[4],[8]	206,617		205,722		$ 25,576	$ 9,136	60,759	141,549		(1,622)		(27,772)	(1,904)	895
Ending balance, shares at Sep. 30, 2017	[4],[8]					11,895,783	4,927,871,148
Balance, beginning of period at Jun. 30, 2017		205,949		205,034		$ 25,785	$ 9,136	60,689	139,366		(2,148)		(25,675)	(2,119)	915
Beginning balance, shares at Jun. 30, 2017						12,104,127	4,966,770,050
Stockholders' Equity Period Increase (Decrease)
Net income		4,542	[2],[3]	4,542	[8]				4,542	[8]
Net income attributable to noncontrolling interests		(58)													58	[8]
Net income	[3],[8]	4,600
Other comprehensive income (loss) attributable to parent, net of tax		526	[2]	526	[8]						526	[8]
Other comprehensive income (loss) attributable to noncontrolling interest, net of tax		34													(34)	[8]
Other comprehensive income (loss), net of tax		492	[2],[8]								492
Noncontrolling interests, adjustments to Additional Paid in Capital				0
Noncontrolling interests															(44)
Total change in noncontrolling interests		(44)
Common stock issued		254		254				(61)					315
Common stock, shares issued							6,345,864
Common stock repurchased		(2,601)		(2,601)				0					(2,601)
Common stock repurchased, shares							(49,022,535)
Preferred stock redeemed, Value	[9]	0		0		$ 0		0
Preferred stock redeemed, Shares	[9]					0
Preferred stock issued to ESOP		0		0
Preferred stock released by ESOP		209		209				(6)						215
Preferred stock converted to common shares		0		0		$ (209)		20					189
Preferred stock converted to common shares, shares						(208,344)	3,777,769
Common stock warrant repurchased/exercised		(19)		(19)				(19)
Preferred stock issued		0		0
Common stock dividends		(1,936)		(1,936)				12	(1,948)
Preferred stock dividends		(411)		(411)					(411)
Stock incentive compensation expense		135		135				135
Net change in deferred compensation and related plans		(11)		(11)				(11)					0
Net change	[8]	668		688		$ (209)	$ 0	70	2,183		526		(2,097)	215	(20)
Net change, shares	[8]					(208,344)	(38,898,902)
Balance, end of period at Sep. 30, 2017	[4],[8]	206,617		205,722		$ 25,576	$ 9,136	60,759	141,549		(1,622)		(27,772)	(1,904)	895
Ending balance, shares at Sep. 30, 2017	[4],[8]					11,895,783	4,927,871,148
Stockholders' Equity Period Increase (Decrease)
Cumulative Effect of New Accounting Principle | Accounting Standards Update 2016-01 [Member]	[10]	(24)		(24)					94		(118)
Beginning balance, adjusted balance		208,055		206,912		$ 25,358	$ 9,136	60,893	145,357		(2,262)		(29,892)	(1,678)	1,143
Balance, beginning of period at Dec. 31, 2017		208,079		206,936		$ 25,358	$ 9,136	60,893	145,263		(2,144)		(29,892)	(1,678)	1,143
Beginning balance, shares at Dec. 31, 2017						11,677,235	4,891,616,628
Stockholders' Equity Period Increase (Decrease)
Adoption of accounting standard | Accounting Standards Update 2018-02 [Member]	[11]	0		0					400		(400)
Net income		16,329		16,329					16,329
Net income attributable to noncontrolling interests		(393)													393
Net income		16,722
Other comprehensive income (loss) attributable to parent, net of tax		(4,211)		(4,211)							(4,211)
Other comprehensive income (loss) attributable to noncontrolling interest, net of tax		1													(1)
Other comprehensive income (loss), net of tax		(4,212)									(4,612)
Noncontrolling interests, adjustments to Additional Paid in Capital				7				7
Noncontrolling interests															(597)
Total change in noncontrolling interests		(590)
Common stock issued		1,437		1,437				(53)	(231)				1,721
Common stock, shares issued							34,391,135
Common stock repurchased		(13,334)		(13,334)				0					(13,334)
Common stock repurchased, shares							(232,826,228)
Preferred stock redeemed, Value	[7]	(2,150)		(2,150)		$ (1,995)			(155)
Preferred stock redeemed, Shares	[7]					(2,150,375)
Preferred stock issued to ESOP		0		0		$ 1,100		43						(1,143)
Preferred stock issued to ESOP, shares						1,100,000
Preferred stock released by ESOP		981		981				(60)						1,041
Preferred stock converted to common shares		0		0		$ (981)		33					948
Preferred stock converted to common shares, shares						(981,508)	18,379,511
Common stock warrant repurchased/exercised		(194)		(194)				(194)
Preferred stock issued		0		0		$ 0		0
Preferred stock, shares issued						0
Common stock dividends		(5,873)		(5,873)				48	(5,921)
Preferred stock dividends		(1,203)		(1,203)					(1,203)
Stock incentive compensation expense		897		897				897
Net change in deferred compensation and related plans		(857)		(857)				(876)					19
Net change		(8,376)		(8,171)		$ (1,876)	$ 0	(155)	9,219		(4,611)		(10,646)	(102)	(205)
Net change, shares						(2,031,883)	(180,055,582)
Balance, end of period at Sep. 30, 2018		199,679		198,741		$ 23,482	$ 9,136	60,738	154,576		(6,873)		(40,538)	(1,780)	938
Ending balance, shares at Sep. 30, 2018						9,645,352	4,711,561,046
Balance, beginning of period at Jun. 30, 2018		206,069		205,188		$ 25,737	$ 9,136	59,644	150,803		(5,461)		(32,620)	(2,051)	881
Beginning balance, shares at Jun. 30, 2018						12,055,984	4,849,067,854
Stockholders' Equity Period Increase (Decrease)
Adoption of accounting standard | Accounting Standards Update 2018-02 [Member]	[12]	0		0					400		(400)
Net income		6,007		6,007					6,007
Net income attributable to noncontrolling interests		(79)													79
Net income		6,086
Other comprehensive income (loss) attributable to parent, net of tax		(1,012)		(1,012)							(1,012)
Other comprehensive income (loss) attributable to noncontrolling interest, net of tax		0													0
Other comprehensive income (loss), net of tax		(1,012)									(1,412)
Noncontrolling interests, adjustments to Additional Paid in Capital				0
Noncontrolling interests															(22)
Total change in noncontrolling interests		(22)
Common stock issued		156		156				(58)					214
Common stock, shares issued							4,131,347
Common stock repurchased		(7,382)		(7,382)				1,000					(8,382)
Common stock repurchased, shares							(146,487,043)
Preferred stock redeemed, Value	[9]	(2,150)		(2,150)		$ (1,995)			(155)
Preferred stock redeemed, Shares	[9]					(2,150,375)
Preferred stock issued to ESOP		0		0
Preferred stock released by ESOP		260		260				(11)						271
Preferred stock converted to common shares		0		0		$ (260)		6					254
Preferred stock converted to common shares, shares						(260,257)	4,848,888
Common stock warrant repurchased/exercised		(36)		(36)				(36)
Preferred stock issued		0		0
Common stock dividends		(2,062)		(2,062)				18	(2,080)
Preferred stock dividends		(399)		(399)					(399)
Stock incentive compensation expense		202		202				202
Net change in deferred compensation and related plans		(31)		(31)				(27)					(4)
Net change		(6,390)		(6,447)		$ (2,255)	$ 0	1,094	3,773		(1,412)		(7,918)	271	57
Net change, shares						(2,410,632)	(137,506,808)
Balance, end of period at Sep. 30, 2018		$ 199,679		$ 198,741		$ 23,482	$ 9,136	$ 60,738	$ 154,576		$ (6,873)		$ (40,538)	$ (1,780)	$ 938
Ending balance, shares at Sep. 30, 2018						9,645,352	4,711,561,046
[1]	Effective January 1, 2017, we adopted changes in hedge accounting pursuant to ASU 2017-12 – Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities.
[2]	(1)Financial information for the prior period has been revised to reflect the impact of the adoption of ASU 2017-12 – Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities, effective January 1, 2017.
[3]	(2)Financial information for the prior period has been revised to reflect the impact of the adoption of ASU 2017-12 – Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities, effective January 1, 2017.
[4]	(5)Financial information for the prior period has been revised to reflect the impact of the adoption of ASU 2017-12 – Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities, effective January 1, 2017.
[5]	(2)Financial information for the prior period has been revised to reflect the impact of the adoption of ASU 2017-12 – Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities, effective January 1, 2017.
[6]	(3)Total other-than-temporary impairment (OTTI) losses (reversal of losses) were $0 million and $5 million for third quarter 2018 and 2017, respectively. Of total OTTI, losses of $5 million and $7 million were recognized in earnings, and losses (reversal of losses) of $(5) million and $(2) million were recognized as non-credit-related OTTI in other comprehensive income for third quarter 2018 and 2017, respectively. Total OTTI losses were $14 million and $54 million for the first nine months of 2018 and 2017, respectively. Of total OTTI, losses of $23 million and $107 million were recognized in earnings, and losses (reversal of losses) of $(9) million and $(53) million were recognized as non-credit-related OTTI in other comprehensive income for the first nine months of 2018 and 2017, respectively.
[7]	(3)Represents the impact of the redemption of preferred stock, series J, in third quarter 2018
[8]	(3)Financial information for the prior period has been revised to reflect the impact of the adoption of ASU 2017-12 – Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities, effective January 1, 2017.
[9]	(2)Represents the impact of the redemption of preferred stock, series J, in third quarter 2018.
[10]	Effective January 1, 2018, we adopted ASU 2016-04 – Liabilities – Extinguishments of Liabilities (Subtopic 405-20): Recognition of Breakage for Certain Prepaid Stored-Value Products, ASU 2016-01 – Financial Instruments – Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities, and ASU 2014-09 – Revenue from Contracts With Customers (Topic 606) and subsequent related Updates. See Note 1 (Summary of Significant Accounting Policies) in this Report for more information.
[11]	(2)Represents the reclassification from other comprehensive income to retained earnings as a result of the adoption of ASU 2018-02 - Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income, in the third quarter of 2018. For additional information, see Note 1.
[12]	Represents the reclassification from other comprehensive income to retained earnings as a result of the adoption of ASU 2018-02 - Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income, in the third quarter of 2018. For additional information, see Note 1.

Consolidated Statement of Cha_2

Consolidated Statement of Changes in Equity (Unaudited) (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2018	Sep. 30, 2017
Private Forward Repurchase Transaction [Member]
Consolidated Statement of Changes in Equity (Textuals) [Abstract]
Private forward repurchase contract	$ 0	$ 0

Consolidated Statement of Cash

Consolidated Statement of Cash Flows (Unaudited) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2018		Sep. 30, 2017
Cash flows from operating activities:
Net income before noncontrolling interests (2)	$ 16,722		$ 16,219	[1],[2],[3]
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses	1,223		1,877
Changes in fair value of MSRs, MLHFS and LHFS carried at fair value	(1,057)		828
Depreciation, amortization and accretion	4,222		3,794
Other net (gains) losses (1)(2)	(8,919)		284	[2],[4]
Stock-based compensation	1,859		1,595
Originations and purchases of mortgage loans held for sale (1)	(120,006)		(134,319)	[4]
Proceeds from sales of and paydowns on mortgage loans held for sale (1)	90,714		97,059	[4]
Net change in:
Debt and equity securities, held for trading (1)	24,709		28,572	[4]
Loans held for sale (1)	(530)		163	[4]
Deferred income taxes	940		1,748
Derivative assets and liabilities (2)	315		(4,038)	[2]
Other assets (2)	9,738		2,176	[2]
Other accrued expenses and liabilities (2)	1,109		2,386	[2]
Net cash provided by operating activities	21,039		18,344
Net change in:
Federal funds sold and securities purchased under resale agreements (3)	(4,448)		(8,562)	[5]
Available-for-sale debt securities:
Proceeds from sales (1)	7,088		37,069	[4]
Prepayments and maturities (1)	28,360		35,387	[4]
Purchases (1)	(41,495)		(74,248)	[4]
Held-to-maturity debt securities:
Paydowns and maturities	8,509		7,557
Equity securities, not held for trading:
Proceeds from sales and capital returns (1)	4,481		3,979	[4]
Purchases (1)	(3,937)		(2,588)	[4]
Loans:
Loans originated by banking subsidiaries, net of principal collected (4)	(2,965)		5,568	[6]
Proceeds from sales (including participations) of loans held for investment	12,356		8,473
Purchases (including participations) of loans	(896)		(2,436)
Principal collected on nonbank entities’ loans (4)	5,110		5,968	[6]
Loans originated by nonbank entities (4)	(5,760)		(4,199)	[6]
Net cash paid for acquisitions	(10)		(23)
Proceeds from sales of foreclosed assets and short sales	2,781		4,175
Other, net	1,317		(1,336)
Net cash provided by investing activities	10,491		14,784
Net change in:
Deposits	(69,371)		627
Short-term borrowings	2,195		4,655
Long-term debt:
Proceeds from issuance	31,397		38,358
Repayment	(29,419)		(60,103)
Preferred stock:
Proceeds from Issuance	0		677
Redeemed	(2,150)		0
Cash dividends paid	(1,211)		(1,226)
Common stock:
Proceeds from issuance	548		905
Stock tendered for payment of withholding taxes	(322)		(376)
Repurchased	(13,334)		(7,063)
Cash dividends paid	(5,730)		(5,605)
Net change in noncontrolling interests	(364)		(72)
Other, net	(193)		(94)
Net cash used by financing activities	(87,954)		(29,317)
Net change in cash, cash equivalents, and restricted cash (3)	(56,424)		3,811	[5]
Cash, cash equivalents, and restricted cash at beginning of period (3)	215,947	[7]	221,043	[5]
Cash, cash equivalents, and restricted cash at end of period (3)	159,523		224,854	[5]
Supplemental cash flow disclosures:
Cash paid for interest	10,108		6,514
Cash paid for income taxes	$ 1,921		$ 4,687
[1]	(2)Financial information for the prior period has been revised to reflect the impact of the adoption of ASU 2017-12 – Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities, effective January 1, 2017.
[2]	(2)Financial information for the prior period has been revised to reflect the impact of the adoption of ASU 2017-12 – Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities, effective January 1, 2017.
[3]	(5)Financial information for the prior period has been revised to reflect the impact of the adoption of ASU 2017-12 – Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities, effective January 1, 2017.
[4]	(1)Financial information for the prior period has been revised to reflect the impact of the adoption in first quarter 2018 of ASU 2016-01 – Financial Instruments – Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities. See Note 1 (Summary of Significant Accounting Policies) for more information.
[5]	(3)Financial information has been revised to reflect the impact of the adoption in first quarter 2018 of ASU 2016-18 – Statement of Cash Flows (Topic 230): Restricted Cash in which we changed the presentation of our cash and cash equivalents to include both cash and due from banks as well as interest-earning deposits with banks, which are inclusive of any restricted cash. See Note 1 (Summary of Significant Accounting Policies) for more information.
[6]	(4)Prior periods have been revised to reflect classification changes due to entity restructuring activities.
[7]	(1)Financial information has been revised to reflect the impact of the adoption in first quarter 2018 of ASU 2016-18 – Statement of Cash Flows (Topic 230): Restricted Cash in which we changed the presentation of our cash and cash equivalents to include both cash and due from banks as well as interest-earning deposits with banks, which are inclusive of any restricted cash. See Note 1 (Summary of Significant Accounting Policies) for more information.

Summary of Significant Accounti

Summary of Significant Accounting Policies	9 Months Ended
	Sep. 30, 2018
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Note 1: Summary of Significant Accounting Policies Wells Fargo & Company is a diversified financial services company. We provide banking, trust and investments, mortgage banking, investment banking, retail banking, brokerage, and consumer and commercial finance through banking locations, the internet and other distribution channels to consumers, businesses and institutions in all 50 states, the District of Columbia, and in foreign countries. When we refer to “Wells Fargo,” “the Company,” “we,” “our” or “us,” we mean Wells Fargo & Company and Subsidiaries (consolidated). Wells Fargo & Company (the Parent) is a financial holding company and a bank holding company. We also hold a majority interest in a real estate investment trust, which has publicly traded preferred stock outstanding. Our accounting and reporting policies conform with U.S. generally accepted accounting principles (GAAP) and practices in the financial services industry. For discussion of our significant accounting policies, see Note 1 (Summary of Significant Accounting Policies) in our Annual Report on Form 10-K for the year ended December 31, 2017 ( 2017 Form 10-K). To prepare the financial statements in conformity with GAAP, management must make estimates based on assumptions about future economic and market conditions (for example, unemployment, market liquidity, real estate prices, etc.) that affect the reported amounts of assets and liabilities at the date of the financial statements, income and expenses during the reporting period and the related disclosures. Although our estimates contemplate current conditions and how we expect them to change in the future, it is reasonably possible that actual conditions could be worse than anticipated in those estimates, which could materially affect our results of operations and financial condition. Management has made significant estimates in several areas, including: • allowance for credit losses (Note 6 (Loans and Allowance for Credit Losses)); • valuations of residential mortgage servicing rights (MSRs) (Note 9 (Securitizations and Variable Interest Entities) and Note 10 (Mortgage Banking Activities)) and financial instruments (Note 15 (Fair Values of Assets and Liabilities)); • liabilities for contingent litigation losses (Note 13 (Legal Actions)); and • income taxes. Actual results could differ from those estimates. These unaudited interim financial statements reflect all adjustments that are, in the opinion of management, necessary for a fair statement of the results for the periods presented. These adjustments are of a normal recurring nature, unless otherwise disclosed in this Form 10-Q. The results of operations in the interim financial statements do not necessarily indicate the results that may be expected for the full year. The interim financial information should be read in conjunction with our 2017 Form 10-K. Accounting Standards Adopted in 2018 In first quarter 2018 , we adopted the following new accounting guidance: • Accounting Standards Update (ASU or Update) 2017-09 – Compensation – Stock Compensation (Topic 718): Scope of Modification Accounting; • ASU 2017-07 – Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost; • ASU 2017-05 – Other Income – Gains and Losses from the Derecognition of Nonfinancial Assets (Subtopic 610-20): Clarifying the Scope of Asset Derecognition Guidance and Accounting for Partial Sales of Nonfinancial Assets; • ASU 2017-01 – Business Combinations (Topic 805): Clarifying the Definition of a Business; • ASU 2016-18 – Statement of Cash Flows (Topic 230): Restricted Cash; • ASU 2016-16 – Income Taxes (Topic 740): Intra-Entity Transfers of Assets Other Than Inventory; • ASU 2016-15 – Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments; • ASU 2016-04 – Liabilities – Extinguishments of Liabilities (Subtopic 405-20): Recognition of Breakage for Certain Prepaid Stored-Value Products; • ASU 2016-01 – Financial Instruments – Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities; and • ASU 2014-09 – Revenue from Contracts With Customers (Topic 606) and subsequent related Updates. ASU 2017-09 clarifies when to account for a change to the terms or conditions of a share-based payment award as a modification. Under the ASU, modification accounting is required only if the fair value, the vesting conditions, or the classification of the award (as equity or liability) changes as a result of the change in terms or conditions. The Update is applied to awards modified on or after the adoption date and accordingly, did not have a material impact on our consolidated financial statements. ASU 2017-07 requires that the service cost component of net benefit cost be reported in the same line item as other compensation costs arising from services rendered by employees during the period, and the other pension cost components (interest cost, expected return on plan assets and amortization of actuarial gains and losses) be presented in the income statement separate from the service cost component. The income statement line item used to present the other pension cost components must be disclosed. We adopted this change in first quarter 2018. The Update did not have a material impact on our consolidated financial statements. ASU 2017-05 provides guidance for recognizing gains and losses from the transfer of nonfinancial assets in contracts with non-customers. The ASU applies to nonfinancial assets, including real estate (e.g., buildings, land, windmills, solar farms), ships and intellectual property. We adopted this change in first quarter 2018. The Update did not have a material impact on our consolidated financial statements. ASU 2017-01 requires that when substantially all of the fair value of gross assets acquired is concentrated in a single asset (or a group of similar assets), the assets acquired would not represent a business. The Update is applied prospectively and accordingly, did not have a material impact on our consolidated financial statements. ASU 2016-18 requires that restricted cash and cash equivalents are included with the total cash and cash equivalents in the consolidated statement of cash flows. In addition, the nature of any restrictions will be disclosed in the footnotes to the financial statements. We adopted this change in first quarter 2018. Our retrospective adoption includes changes to our presentation of cash and cash equivalents in our consolidated statement of cash flows to include both cash and due from banks as well as interest-earning deposits with banks. In addition, we had corresponding changes on our consolidated balance sheets. ASU 2016-16 requires us to recognize the income tax effects of intercompany sales and transfers of assets other than inventory in the period in which the transfer occurs. We adopted this change in first quarter 2018. The Update did not have a material impact on our consolidated financial statements. ASU 2016-15 addresses eight specific cash flow issues with the objective of reducing the existing diversity in practice for reporting in the statement of cash flows. We adopted this change in first quarter 2018. The Update did not have a material impact on our consolidated financial statements. ASU 2016-04 modifies the accounting for certain prepaid card products to require the recognition of breakage. Breakage represents the estimated amount that will not be redeemed by the cardholder for goods or services. We adopted this change in first quarter 2018. Upon adoption, we recorded a cumulative-effect adjustment that increased retained earnings, given estimated breakage, by $20 million . ASU 2016-01 changes the accounting for certain equity securities to record at fair value with unrealized gains or losses reflected in earnings, as well as improve the disclosures of equity securities and the fair value of financial instruments. The Update also requires that for purposes of disclosing the fair value of financial instruments recorded at amortized cost, including loans and long-term debt, the valuation methodology is based on an exit price notion. We adopted the Update in first quarter 2018 and recorded a cumulative-effect adjustment as of January 1, 2018, that increased retained earnings by $106 million as a result of a transition adjustment to reclassify $118 million in net unrealized gains from other comprehensive income to retained earnings, partially offset by a transition adjustment to decrease retained earnings by $12 million primarily to adjust the carrying value of our auction rate securities from cost to fair value. No transition adjustment was recorded for investments changed to the measurement alternative (described below), which was applied prospectively. As a result of adopting this ASU, our investments in marketable equity securities, including those previously classified as available-for-sale, are accounted for at fair value with unrealized gains or losses reflected in earnings. Additionally, our share of unrealized gains or losses related to marketable equity securities held by our equity method investees are reflected in earnings. Prior to adoption, such unrealized gains and losses were reflected in other comprehensive income. Our investments in nonmarketable equity securities previously accounted for under the cost method of accounting, except for federal bank stock, are now accounted for either at fair value with unrealized gains and losses reflected in earnings or using the measurement alternative. The measurement alternative is similar to the cost method of accounting, except the carrying value is adjusted through earnings for impairment, if any, and changes in observable and orderly transactions in the same or similar investment. We account for substantially all of our private equity securities, previously using the cost method of accounting, now under the measurement alternative. Our auction rate securities portfolio is now accounted for at fair value with unrealized gains or losses reflected in earnings. In connection with our adoption of this Update, we have modified our balance sheet and income statement presentation to report marketable and nonmarketable equity securities and their results separately from debt securities by now reporting all equity securities in a new line labeled “Equity securities” in both the balance sheet and income statement. Additionally we now report loans held for trading purposes in loans held for sale and have reclassified net gains and losses on marketable equity securities used as economic hedges of deferred compensation obligations from “Net gains for trading activities” to “Net gains from equity securities”. All prior periods have been revised to conform to these changes in reporting. Table 1.1 provides a summary of our reporting changes implemented in connection with our adoption of ASU 2016-01 in first quarter 2018. Table 1.1: Summary of Reporting Changes Financial instrument or transaction type As previously reported Revised reporting Balance Sheet Marketable equity securities Trading assets and available for sale investment securities Equity securities (new caption) Nonmarketable equity securities Other assets Equity securities (new caption) Loans held for trading Trading assets Loans held for sale Debt securities held for trading Trading assets Debt securities (formerly “Investment securities”) Income Statement Interest income: Marketable equity securities Trading assets and investment securities Equity securities (new caption) Nonmarketable equity securities Other Equity securities (new caption) Loans held for trading Trading assets Loans held for sale Debt securities held for trading Trading assets Debt securities (formerly “Investment securities”) Noninterest income: Deferred compensation gains (1) Net gains from trading activities Net gains from equity securities (1) Reclassification of net gains and losses on marketable equity securities economically hedging our deferred compensation obligations. Table 1.2 summarizes financial assets and liabilities by form and measurement accounting model. Table 1.2: Accounting Model for Financial Assets and Liabilities Balance sheet caption Measurement model(s) Financial statement Note reference Cash and due from banks Cost N/A Interest-earning deposits with banks Cost N/A Federal funds sold and securities purchased under resale agreements Amortized cost N/A Debt securities: Trading FV-NI (1) Note 4: Trading Activities Note 15: Fair Values of Assets and Liabilities Available-for-sale FV-OCI (2) Note 5: Available-for-Sale and Held-to-Maturity Debt Securities Held-to-maturity Amortized cost Note 5: Available-for-Sale and Held-to-Maturity Debt Securities Mortgage loans held for sale FV-NI (1) LOCOM (3) Note 15: Fair Values of Assets and Liabilities Loans held for sale FV-NI (1) Note 15: Fair Values of Assets and Liabilities Loans Amortized cost FV-NI (1) Note 6: Loans and Allowance for Credit Losses Derivative assets and liabilities FV-NI (1) FV-OCI (2) Note 4: Trading Activities Note 15: Fair Values of Assets and Liabilities Equity securities: Marketable FV-NI (1) Note 4: Trading Activities Note 15: Fair Values of Assets and Liabilities Nonmarketable FV-NI (1) Cost method Equity method MA (4) Note 4: Trading Activities Other assets Amortized cost (5) Note 8: Other Assets Deposits Amortized cost N/A Short-term borrowings Amortized cost N/A Long-term debt Amortized cost N/A (1) FV-NI represents the fair value through net income accounting model. (2) FV-OCI represents the fair value through other comprehensive income accounting model. (3) LOCOM represents the lower of cost or fair value accounting model. (4) MA represents the measurement alternative accounting model. (5) Other assets are generally carried at amortized cost, except for bank-owned life insurance which is carried at cash surrender value. ASU 2014-09 modifies the guidance used to recognize revenue from contracts with customers for transfers of goods or services and transfers of non-financial assets, unless those contracts are within the scope of other guidance. Upon a modified retrospective adoption, we recorded a cumulative-effect adjustment that decreased retained earnings by $32 million , due to changes in the timing of revenue for corporate trust services that are provided over the life of the associated trust. In addition, we changed the presentation of some costs such that underwriting expenses of our broker-dealer business that were previously netted against revenue are now included in noninterest expense, and card payment network charges that were previously included in noninterest expense are now netted against card fee revenue. In third quarter 2018 , we adopted the following new accounting guidance: • ASU 2018-02 – Income Statement-Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income . ASU 2018-02 allows a reclassification to update amounts in accumulated other comprehensive income to an appropriate tax rate under the Tax Cuts & Jobs Act. In third quarter 2018, we reclassified $400 million resulting in a reduction of accumulated other comprehensive income and an increase to retained earnings. For additional information, see Note 20: Other Comprehensive Income. In addition, we recognized $104 million of additional tax expense associated with the re-measurement of our initial estimates for the impacts of the Tax Cuts & Jobs Act, in accordance with ASC Topic 740, Income Taxes and SEC Staff Accounting Bulletin 118. These adjustments were included in income tax expense. We continue to collect and analyze data related to our provisional tax estimates and monitor interpretations that emerge for various provisions of the Tax Act. We anticipate the re-measurements will be finalized upon completion of our U.S. tax filings in the fourth quarter. Private Share Repurchases From time to time we enter into private forward repurchase transactions with unrelated third parties to complement our open-market common stock repurchase strategies, to allow us to manage our share repurchases in a manner consistent with our capital plans submitted annually under the Comprehensive Capital Analysis and Review (CCAR) and to provide an economic benefit to the Company. Our payments to the counterparties for these contracts are recorded in permanent equity in the quarter paid and are not subject to re-measurement. The classification of the up-front payments as permanent equity assures that we have appropriate repurchase timing consistent with our capital plans, which contemplate a fixed dollar amount available per quarter for share repurchases pursuant to Federal Reserve Board (FRB) supervisory guidance. In return, the counterparty agrees to deliver a variable number of shares based on a per share discount to the volume-weighted average stock price over the contract period. There are no scenarios where the contracts would not either physically settle in shares or allow us to choose the settlement method. Our total number of outstanding shares of common stock is not reduced until settlement of the private share repurchase contract. We had no unsettled private share repurchase contracts at both September 30, 2018 and September 30, 2017 . Supplemental Cash Flow Information Significant noncash activities are presented in Table 1.3. Table 1.3: Supplemental Cash Flow Information Nine months ended September 30, (in millions) 2018 2017 Trading debt securities retained from securitization of MLHFS $ 28,761 43,394 Transfers from loans to MLHFS 4,456 4,015 Transfers from loans to LHFS 2,542 681 Transfers from available-for-sale debt securities to held-to-maturity debt securities 13,372 50,405 Subsequent Events We have evaluated the effects of events that have occurred subsequent to September 30, 2018 , and, except as disclosed elsewhere in the footnotes, there have been no material events that would require recognition in our third quarter 2018 consolidated financial statements or disclosure in the Notes to the consolidated financial statements.

Business Combinations

Business Combinations	9 Months Ended
	Sep. 30, 2018
Business Combinations [Abstract]
Business Combinations	Note 2: Business Combinations We regularly explore opportunities to acquire financial services companies and businesses. Generally, we do not make a public announcement about an acquisition opportunity until a definitive agreement has been signed. For information on additional contingent consideration related to acquisitions, which is considered to be a guarantee, see Note 12 (Guarantees, Pledged Assets and Collateral, and Other Commitments). We completed no new acquisitions during the first nine months of 2018 and had no business combinations pending as of September 30, 2018. We completed the sale of Wells Fargo Shareowner Services in February 2018 and the sale of the automobile lending business of Reliable Financial Services, Inc. and Reliable Finance Holding Company in August 2018. In June 2018, we announced plans to divest 52 branches in Indiana, Ohio, Michigan and part of Wisconsin. Included with the sale are approximately $2 billion of deposits as of September 30, 2018. The final amount of deposits that will be divested could differ.

Cash, Loan and Dividend Restric

Cash, Loan and Dividend Restrictions	9 Months Ended
	Sep. 30, 2018
Disclosure of Restrictions on Dividends, Loans and Advances Disclosure [Abstract]
Cash, Loan and Dividend Restrictions	Note 3: Cash, Loan and Dividend Restrictions Cash and cash equivalents may be restricted as to usage or withdrawal. Federal Reserve Board (FRB) regulations require that each of our subsidiary banks maintain reserve balances on deposit with the Federal Reserve Banks. Table 3.1 provides a summary of restrictions on cash equivalents in addition to the FRB reserve cash balance requirements . Table 3.1: Nature of Restrictions on Cash Equivalents (in millions) Sep 30, Dec 31, Average required reserve balance for FRB (1) $ 12,798 12,306 Reserve balance for non-U.S. central banks 554 617 Segregated for benefit of brokerage customers under federal and other brokerage regulations 698 666 Related to consolidated variable interest entities (VIEs) that can only be used to settle liabilities of VIEs 120 487 (1) FRB required reserve balance represents average for the first nine months of 2018 and for the year ended December 31, 2017 . We are subject to additional loan and dividend restrictions. We have a state-chartered subsidiary bank that is subject to state regulations that limit dividends. Under these provisions and regulatory limitations, our national and state-chartered subsidiary banks could have declared additional dividends of $15.6 billion at September 30, 2018 , without obtaining prior regulatory approval. Our nonbank subsidiaries are also limited by certain federal and state statutory provisions and regulations covering the amount of dividends that may be paid in any given year. I n addition, under a Support Agreement dated June 28, 2017, among Wells Fargo & Company, the parent holding company (the “Parent”), WFC Holdings, LLC, an intermediate holding company and subsidiary of the Parent (the “IHC”), and Wells Fargo Bank, N.A., Wells Fargo Securities, LLC, and Wells Fargo Clearing Services, LLC, each an indirect subsidiary of the Parent, the IHC may be restricted from making dividend payments to the Parent if certain liquidity and/or capital metrics fall below defined triggers. Based on retained earnings at September 30, 2018 , our nonbank subsidiaries could have declared additional dividends of $25.5 billion at September 30, 2018 , without obtaining prior regulatory approval. For additional information see Note 3 ( Cash, Loan and Dividend Restrictions) in our 2017 Form 10-K. The FRB’s Capital Plan Rule (codified at 12 CFR 225.8 of Regulation Y) establishes capital planning and prior notice and approval requirements for capital distributions including dividends by certain large bank holding companies. The FRB has also published guidance regarding its supervisory expectations for capital planning, including capital policies regarding the process relating to common stock dividend and repurchase decisions in the FRB’s SR Letter 15-18. The effect of this guidance is to require the approval of the FRB (or specifically under the Capital Plan Rule, a notice of non-objection) for the Company to repurchase or redeem common or perpetual preferred stock as well as to raise the per share quarterly dividend from its current level of $0.43 per share as declared by the Company’s Board of Directors on October 23, 2018 , payable on December 1, 2018 .

Trading Activities

Trading Activities	9 Months Ended
	Sep. 30, 2018
Trading Activities [Abstract]
Trading Activities	Note 4: Trading Activities We engage in trading activities to accommodate the investment and risk management activities of our customers. These activities predominantly occur in our Wholesale Banking businesses and to a lesser extent other divisions of the Company. Assets and liabilities associated with our trading activities include debt and equity securities, derivatives, loans and short sales. Our trading assets and liabilities are carried on the balance sheet at fair value with changes in fair value recognized in net gains from trading activities and interest income and interest expense recognized in net interest income. Table 4.1 presents a summary of our trading assets and liabilities measured at fair value through earnings . Table 4.1: Trading Assets and Liabilities Sep 30, Dec 31, (in millions) 2018 2017 Trading assets: Debt securities $ 65,188 57,624 Equity securities 26,138 30,004 Loans held for sale 1,266 1,023 Gross trading derivative assets 30,302 31,340 Netting (1) (19,188 ) (19,629 ) Total trading derivative assets 11,114 11,711 Total trading assets 103,706 100,362 Trading liabilities: Short sale 23,992 18,472 Gross trading derivative liabilities 29,268 31,386 Netting (1) (21,842 ) (23,062 ) Total trading derivative liabilities 7,426 8,324 Total trading liabilities $ 31,418 26,796 (1) Represents balance sheet netting for trading derivative asset and liability balances, and trading portfolio level counterparty valuation adjustments. Table 4.2 provides a summary of the net interest income earned from trading securities, and net gains and losses due to the realized and unrealized gains and losses from trading activities. Table 4.2: Net Interest Income and Net Gains (Losses) on Trading Activities Quarter ended September 30, Nine months ended September 30, (in millions) 2018 2017 2018 2017 Interest income (1): Debt securities $ 723 607 2,043 1,678 Equity securities 178 125 447 370 Loans held for sale 20 11 43 29 Total interest income 921 743 2,533 2,077 Less: Interest expense (2) 157 107 429 305 Net interest income 764 636 2,104 1,772 Net gains (losses) from trading activities: Debt securities (369 ) 52 (1,008 ) 348 Equity securities 1,129 717 25 2,143 Loans held for sale 3 6 18 42 Derivatives (3) (605 ) (655 ) 1,557 (1,990 ) Total net gains from trading activities (4) 158 120 592 543 Total trading-related net interest and noninterest income $ 922 756 2,696 2,315 (1) Represents interest and dividend income earned on trading securities. (2) Represents interest and dividend expense incurred on trading securities we have sold but have not yet purchased. (3) Excludes economic hedging of mortgage banking and asset/liability management activities, for which hedge results (realized and unrealized) are reported with the respective hedged activities. (4) Represents realized gains (losses) from our trading activities and unrealized gains (losses) due to changes in fair value of our trading positions, attributable to the type of asset or liability. Customer accommodation trading activities include our actions as an intermediary to buy and sell financial instruments and market-making activities. We also take positions to manage our exposure to customer accommodation activities. We hold financial instruments for trading in long positions (assets), as well as short positions where we sold financial instruments we have not yet purchased (liabilities), to facilitate our trading activities. As an intermediary we interact with market buyers and sellers to facilitate the purchase and sale of financial instruments to meet the anticipated or current needs of our customers. For example, we may purchase or sell a derivative to a customer who wants to manage interest rate risk exposure. We typically enter into an offsetting derivative or security position to manage our exposure to the customer transaction. We earn income based on the transaction price difference between the customer transaction and the offsetting position, which is reflected in the fair value changes of the positions recorded in the net gains from trading activities. Our market-making activities include taking long and short trading positions to facilitate customer order flow. These activities are typically executed on a short term basis. As a market-maker we earn income due to: (1) difference between the price paid or received for the purchase and sale of the security (bid-ask spread), (2) the net interest income of the positions, and (3) the changes in fair value of the trading positions held on our balance sheet. Additionally, we may enter into separate derivative or security positions to manage our exposure related to our long and short trading positions taken in our market-making activities. Income earned on these market-making activities are reflected in the fair value changes of these positions recorded in net gains from trading activities.

AFS and HTM Debt Securities

AFS and HTM Debt Securities	9 Months Ended
	Sep. 30, 2018
AFS and HTM Debt Securities [Abstract]
AFS and HTM Debt Securities	Note 5: Available-for-Sale and Held-to-Maturity Debt Securities Table 5.1 provides the amortized cost and fair value by major categories of available-for-sale debt securities, which are carried at fair value, and held-to-maturity debt securities, which are carried at amortized cost. The net unrealized gains (losses) for available-for-sale debt securities are reported on an after-tax basis as a component of cumulative OCI. Information on debt securities held for trading is included in Note 4 (Trading Activities) to Financial Statements in this Report. Table 5.1: Amortized Cost and Fair Value (in millions) Amortized Cost Gross unrealized gains Gross unrealized losses Fair value September 30, 2018 Available-for-sale debt securities: Securities of U.S. Treasury and federal agencies $ 6,347 1 (161 ) 6,187 Securities of U.S. states and political subdivisions (1) 47,565 984 (333 ) 48,216 Mortgage-backed securities: Federal agencies 158,584 289 (5,362 ) 153,511 Residential 2,789 179 (2 ) 2,966 Commercial 3,910 67 (4 ) 3,973 Total mortgage-backed securities 165,283 535 (5,368 ) 160,450 Corporate debt securities 6,365 273 (24 ) 6,614 Collateralized loan and other debt obligations (2) 35,973 239 (18 ) 36,194 Other (3) 5,189 120 (6 ) 5,303 Total available-for-sale debt securities 266,722 2,152 (5,910 ) 262,964 Held-to-maturity debt securities: Securities of U.S. Treasury and federal agencies 44,743 — (1,075 ) 43,668 Securities of U.S. states and political subdivisions 6,293 15 (157 ) 6,151 Federal agency and other mortgage-backed securities (4) 93,020 7 (3,885 ) 89,142 Collateralized loan obligations 75 — — 75 Other (3) — — — — Total held-to-maturity debt securities 144,131 22 (5,117 ) 139,036 Total $ 410,853 2,174 (11,027 ) 402,000 December 31, 2017 Available-for-sale debt securities: Securities of U.S. Treasury and federal agencies $ 6,425 2 (108 ) 6,319 Securities of U.S. states and political subdivisions (1) 50,733 1,032 (439 ) 51,326 Mortgage-backed securities: Federal agencies 160,561 930 (1,272 ) 160,219 Residential 4,356 254 (2 ) 4,608 Commercial 4,487 80 (2 ) 4,565 Total mortgage-backed securities 169,404 1,264 (1,276 ) 169,392 Corporate debt securities 7,343 363 (40 ) 7,666 Collateralized loan and other debt obligations (2) 35,675 384 (3 ) 36,056 Other (3) 5,516 137 (5 ) 5,648 Total available-for-sale debt securities 275,096 3,182 (1,871 ) 276,407 Held-to-maturity debt securities: Securities of U.S. Treasury and federal agencies 44,720 189 (103 ) 44,806 Securities of U.S. states and political subdivisions 6,313 84 (43 ) 6,354 Federal agency and other mortgage-backed securities (4) 87,527 201 (682 ) 87,046 Collateralized loan obligations 661 4 — 665 Other (3) 114 — — 114 Total held-to-maturity debt securities 139,335 478 (828 ) 138,985 Total $ 414,431 3,660 (2,699 ) 415,392 (1) Available-for-sale debt securities include investments in tax-exempt preferred debt securities issued by investment funds or trusts that predominantly invest in tax-exempt municipal securities. The cost basis and fair value of these types of securities was $6.2 billion each at September 30, 2018 , and $5.2 billion each at December 31, 2017 . (2) Available-for-sale debt securities include collateralized debt obligations (CDOs) with a cost basis and fair value of $690 million and $843 million , respectively, at September 30, 2018 , and $887 million and $1.0 billion , respectively, at December 31, 2017 . (3) The “Other” category of available-for-sale debt securities largely includes asset-backed securities collateralized by student loans. Included in the “Other” category of held-to-maturity debt securities are asset-backed securities collateralized by automobile leases or loans and cash with a cost basis and fair value of $0 million each at September 30, 2018 , and $114 million each at December 31, 2017 . (4) Predominantly consists of federal agency mortgage-backed securities at both September 30, 2018 and December 31, 2017 . Gross Unrealized Losses and Fair Value Table 5.2 shows the gross unrealized losses and fair value of available-for-sale and held-to-maturity debt securities by length of time those individual securities in each category have been in a continuous loss position. Debt securities on which we have taken credit-related OTTI write-downs are categorized as being “less than 12 months” or “12 months or more” in a continuous loss position based on the point in time that the fair value declined to below the cost basis and not the period of time since the credit-related OTTI write-down. Table 5.2: Gross Unrealized Losses and Fair Value Less than 12 months 12 months or more Total (in millions) Gross unrealized losses Fair value Gross unrealized losses Fair value Gross unrealized losses Fair value September 30, 2018 Available-for-sale debt securities: Securities of U.S. Treasury and federal agencies $ (32 ) 1,705 (129 ) 4,444 (161 ) 6,149 Securities of U.S. states and political subdivisions (26 ) 7,207 (307 ) 8,737 (333 ) 15,944 Mortgage-backed securities: Federal agencies (2,165 ) 82,975 (3,197 ) 63,029 (5,362 ) 146,004 Residential (1 ) 169 (1 ) 52 (2 ) 221 Commercial (3 ) 438 (1 ) 60 (4 ) 498 Total mortgage-backed securities (2,169 ) 83,582 (3,199 ) 63,141 (5,368 ) 146,723 Corporate debt securities (12 ) 658 (12 ) 246 (24 ) 904 Collateralized loan and other debt obligations (17 ) 8,725 (1 ) 165 (18 ) 8,890 Other (2 ) 476 (4 ) 153 (6 ) 629 Total available-for-sale debt securities (2,258 ) 102,353 (3,652 ) 76,886 (5,910 ) 179,239 Held-to-maturity debt securities: Securities of U.S. Treasury and federal agencies (871 ) 39,298 (204 ) 4,370 (1,075 ) 43,668 Securities of U.S. states and political subdivisions (62 ) 3,101 (95 ) 1,922 (157 ) 5,023 Federal agency and other mortgage-backed securities (1,166 ) 37,313 (2,719 ) 50,258 (3,885 ) 87,571 Collateralized loan obligations — — — — — — Total held-to-maturity debt securities (2,099 ) 79,712 (3,018 ) 56,550 (5,117 ) 136,262 Total $ (4,357 ) 182,065 (6,670 ) 133,436 (11,027 ) 315,501 December 31, 2017 Available-for-sale debt securities: Securities of U.S. Treasury and federal agencies $ (27 ) 4,065 (81 ) 2,209 (108 ) 6,274 Securities of U.S. states and political subdivisions (17 ) 6,179 (422 ) 11,766 (439 ) 17,945 Mortgage-backed securities: Federal agencies (243 ) 52,559 (1,029 ) 44,691 (1,272 ) 97,250 Residential (1 ) 47 (1 ) 58 (2 ) 105 Commercial (1 ) 101 (1 ) 133 (2 ) 234 Total mortgage-backed securities (245 ) 52,707 (1,031 ) 44,882 (1,276 ) 97,589 Corporate debt securities (4 ) 239 (36 ) 503 (40 ) 742 Collateralized loan and other debt obligations (1 ) 373 (2 ) 146 (3 ) 519 Other (1 ) 37 (4 ) 483 (5 ) 520 Total available-for-sale debt securities (295 ) 63,600 (1,576 ) 59,989 (1,871 ) 123,589 Held-to-maturity debt securities: Securities of U.S. Treasury and federal agencies (69 ) 11,255 (34 ) 1,490 (103 ) 12,745 Securities of U.S. states and political subdivisions (5 ) 500 (38 ) 1,683 (43 ) 2,183 Federal agency and other mortgage-backed securities (198 ) 29,713 (484 ) 28,244 (682 ) 57,957 Collateralized loan obligations — — — — — — Total held-to-maturity debt securities (272 ) 41,468 (556 ) 31,417 (828 ) 72,885 Total $ (567 ) 105,068 (2,132 ) 91,406 (2,699 ) 196,474 We have assessed each debt security with gross unrealized losses included in the previous table for credit impairment. As part of that assessment we evaluated and concluded that we do not intend to sell any of the debt securities and that it is more likely than not that we will not be required to sell prior to recovery of the amortized cost basis. We evaluate, where necessary, whether credit impairment exists by comparing the present value of the expected cash flows to the debt securities’ amortized cost basis. For descriptions of the factors we consider when analyzing debt securities for impairment, see Note 1 (Summary of Significant Accounting Policies) and Note 5 (Investment Securities) to Financial Statements in our 2017 Form 10-K. There were no material changes to our methodologies for assessing impairment in the first nine months of 2018 . Table 5.3 shows the gross unrealized losses and fair value of the available-for-sale and held-to-maturity debt securities by those rated investment grade and those rated less than investment grade, according to their lowest credit rating by Standard & Poor’s Rating Services (S&P) or Moody’s Investors Service (Moody’s). Credit ratings express opinions about the credit quality of a debt security. Debt securities rated investment grade, that is those rated BBB- or higher by S&P or Baa3 or higher by Moody’s, are generally considered by the rating agencies and market participants to be low credit risk. Conversely, debt securities rated below investment grade, labeled as “speculative grade” by the rating agencies, are considered to be distinctively higher credit risk than investment grade debt securities. We have also included debt securities not rated by S&P or Moody’s in the table below based on our internal credit grade of the debt securities (used for credit risk management purposes) equivalent to the credit rating assigned by major credit agencies. The unrealized losses and fair value of unrated debt securities categorized as investment grade based on internal credit grades were $23 million and $5.5 billion , respectively, at September 30, 2018 , and $32 million and $6.9 billion , respectively, at December 31, 2017 . If an internal credit grade was not assigned, we categorized the debt security as non-investment grade. Table 5.3: Gross Unrealized Losses and Fair Value by Investment Grade Investment grade Non-investment grade (in millions) Gross unrealized losses Fair value Gross unrealized losses Fair value September 30, 2018 Available-for-sale debt securities: Securities of U.S. Treasury and federal agencies $ (161 ) 6,149 — — Securities of U.S. states and political subdivisions (314 ) 15,661 (19 ) 283 Mortgage-backed securities: Federal agencies (5,362 ) 146,004 — — Residential (1 ) 147 (1 ) 74 Commercial (1 ) 429 (3 ) 69 Total mortgage-backed securities (5,364 ) 146,580 (4 ) 143 Corporate debt securities (4 ) 276 (20 ) 628 Collateralized loan and other debt obligations (18 ) 8,890 — — Other (3 ) 358 (3 ) 271 Total available-for-sale debt securities (5,864 ) 177,914 (46 ) 1,325 Held-to-maturity debt securities: Securities of U.S. Treasury and federal agencies (1,075 ) 43,668 — — Securities of U.S. states and political subdivisions (157 ) 5,023 — — Federal agency and other mortgage-backed securities (3,873 ) 87,188 (12 ) 383 Collateralized loan obligations — — — — Total held-to-maturity debt securities (5,105 ) 135,879 (12 ) 383 Total $ (10,969 ) 313,793 (58 ) 1,708 December 31, 2017 Available-for-sale debt securities: Securities of U.S. Treasury and federal agencies $ (108 ) 6,274 — — Securities of U.S. states and political subdivisions (412 ) 17,763 (27 ) 182 Mortgage-backed securities: Federal agencies (1,272 ) 97,250 — — Residential (1 ) 42 (1 ) 63 Commercial (1 ) 183 (1 ) 51 Total mortgage-backed securities (1,274 ) 97,475 (2 ) 114 Corporate debt securities (13 ) 304 (27 ) 438 Collateralized loan and other debt obligations (3 ) 519 — — Other (2 ) 469 (3 ) 51 Total available-for-sale debt securities (1,812 ) 122,804 (59 ) 785 Held-to-maturity debt securities: Securities of U.S. Treasury and federal agencies (103 ) 12,745 — — Securities of U.S. states and political subdivisions (43 ) 2,183 — — Federal agency and other mortgage-backed securities (680 ) 57,789 (2 ) 168 Collateralized loan obligations — — — — Total held-to-maturity debt securities (826 ) 72,717 (2 ) 168 Total $ (2,638 ) 195,521 (61 ) 953 Contractual Maturities Table 5.4 shows the remaining contractual maturities and contractual weighted-average yields (taxable-equivalent basis) of available-for-sale debt securities. The remaining contractual principal maturities for MBS do not consider prepayments. Remaining expected maturities will differ from contractual maturities because borrowers may have the right to prepay obligations before the underlying mortgages mature. Table 5.4: Contractual Maturities Remaining contractual maturity Total Within one year After one year through five years After five years through ten years After ten years (in millions) amount Yield Amount Yield Amount Yield Amount Yield Amount Yield September 30, 2018 Available-for-sale debt securities (1): Fair value: Securities of U.S. Treasury and federal agencies $ 6,187 1.60 % $ 46 1.96 % $ 6,094 1.59 % $ 47 1.89 % $ — — % Securities of U.S. states and political subdivisions 48,216 4.73 4,216 2.75 6,507 3.33 4,251 3.31 33,242 5.43 Mortgage-backed securities: Federal agencies 153,511 3.38 — — 63 3.52 2,396 2.66 151,052 3.39 Residential 2,966 3.88 — — 16 5.84 7 2.77 2,943 3.88 Commercial 3,973 3.55 — — — — 311 3.50 3,662 3.56 Total mortgage-backed securities 160,450 3.39 — — 79 4.01 2,714 2.75 157,657 3.41 Corporate debt securities 6,614 5.09 372 5.82 2,505 5.28 3,008 4.75 729 5.47 Collateralized loan and other debt obligations 36,194 3.77 — — 33 3.73 10,592 3.78 25,569 3.76 Other 5,303 3.09 19 4.82 834 3.56 1,083 2.32 3,367 3.21 Total available-for-sale debt securities at fair value $ 262,964 3.68 % $ 4,653 2.99 % $ 16,052 2.99 % $ 21,695 3.62 % $ 220,564 3.76 % December 31, 2017 Available-for-sale debt securities (1): ` Fair value: Securities of U.S. Treasury and federal agencies $ 6,319 1.59 % $ 81 1.37 % $ 6,189 1.59 % $ 49 1.89 % $ — — % Securities of U.S. states and political subdivisions 51,326 5.88 2,380 3.47 9,484 3.42 2,276 4.63 37,186 6.75 Mortgage-backed securities: Federal agencies 160,219 3.27 15 2.03 210 3.08 5,534 2.82 154,460 3.28 Residential 4,608 3.52 — — 24 5.67 11 2.46 4,573 3.51 Commercial 4,565 3.45 — — — — 166 2.69 4,399 3.48 Total mortgage-backed securities 169,392 3.28 15 2.03 234 3.35 5,711 2.82 163,432 3.30 Corporate debt securities 7,666 5.12 443 5.54 2,738 5.56 3,549 4.70 936 5.26 Collateralized loan and other debt obligations 36,056 2.98 — — 50 1.68 15,008 2.96 20,998 3.00 Other 5,648 2.46 71 3.56 463 2.72 1,466 2.13 3,648 2.53 Total available-for-sale debt securities at fair value $ 276,407 3.72 % $ 2,990 3.70 % $ 19,158 3.11 % $ 28,059 3.24 % $ 226,200 3.83 % (1) Weighted-average yields displayed by maturity bucket are weighted based on fair value and predominantly represent contractual coupon rates without effect for any related hedging derivatives. Table 5.5 shows the amortized cost and weighted-average yields of held-to-maturity debt securities by contractual maturity. Table 5.5: Amortized Cost by Contractual Maturity Remaining contractual maturity Total Within one year After one year through five years After five years through ten years After ten years (in millions) amount Yield Amount Yield Amount Yield Amount Yield Amount Yield September 30, 2018 Held-to-maturity debt securities (1): Amortized cost: Securities of U.S. Treasury and federal agencies $ 44,743 2.12 % $ — — % $ 32,349 2.04 % $ 12,394 2.32 % $ — — % Securities of U.S. states and political subdivisions 6,293 4.93 — — 52 5.90 1,118 4.97 5,123 4.91 Federal agency and other mortgage-backed securities 93,020 3.09 — — 15 3.40 11 3.10 92,994 3.09 Collateralized loan obligations 75 3.52 — — — — 75 3.52 — — Other — — — — — — — — — — Total held-to-maturity debt securities at amortized cost $ 144,131 2.87 % $ — — % $ 32,416 2.05 % $ 13,598 2.54 % $ 98,117 3.19 % December 31, 2017 Held-to-maturity debt securities (1): Amortized cost: Securities of U.S. Treasury and federal agencies $ 44,720 2.12 % $ — — % $ 32,330 2.04 % $ 12,390 2.32 % $ — — % Securities of U.S. states and political subdivisions 6,313 6.02 — — 50 7.18 695 6.31 5,568 5.98 Federal agency and other mortgage-backed securities 87,527 3.11 — — 15 2.81 11 2.49 87,501 3.11 Collateralized loan obligations 661 2.86 — — — — 661 2.86 — — Other 114 1.83 — — 114 1.83 — — — — Total held-to-maturity debt securities at amortized cost $ 139,335 2.92 % $ — — % $ 32,509 2.05 % $ 13,757 2.55 % $ 93,069 3.28 % (1) Weighted-average yields displayed by maturity bucket are weighted based on amortized cost and predominantly represent contractual coupon rates. Table 5.6 shows the fair value of held-to-maturity debt securities by contractual maturity. Table 5.6: Fair Value by Contractual Maturity Remaining contractual maturity Total Within one year After one year through five years After five years through ten years After ten years (in millions) amount Amount Amount Amount Amount September 30, 2018 Held-to-maturity debt securities: Fair value: Securities of U.S. Treasury and federal agencies $ 43,668 — 31,700 11,968 — Securities of U.S. states and political subdivisions 6,151 — 50 1,111 4,990 Federal agency and other mortgage-backed securities 89,142 — 15 11 89,116 Collateralized loan obligations 75 — — 75 — Other — — — — — Total held-to-maturity debt securities at fair value $ 139,036 — 31,765 13,165 94,106 December 31, 2017 Held-to-maturity debt securities: Fair value: Securities of U.S. Treasury and federal agencies $ 44,806 — 32,388 12,418 — Securities of U.S. states and political subdivisions 6,354 — 49 701 5,604 Federal agency and other mortgage-backed securities 87,046 — 15 11 87,020 Collateralized loan obligations 665 — — 665 — Other 114 — 114 — — Total held-to-maturity debt securities at fair value $ 138,985 — 32,566 13,795 92,624 Realized Gains and Losses Table 5.7 shows the gross realized gains and losses on sales and OTTI write-downs related to available-for-sale debt securities. Table 5.7: Realized Gains and Losses Quarter ended September 30, Nine months ended September 30, (in millions) 2018 2017 2018 2017 Gross realized gains $ 65 191 139 531 Gross realized losses (3 ) (18 ) (17 ) (102 ) OTTI write-downs (5 ) (7 ) (23 ) (107 ) Net realized gains from available-for-sale debt securities $ 57 166 99 322 Other-Than-Temporarily Impaired Debt Securities Table 5.8 shows the detail of total OTTI write-downs included in earnings for available-for-sale debt securities. There were no OTTI write-downs on held-to-maturity debt securities during the first nine months of 2018 and 2017 . Table 5.8: Detail of OTTI Write-downs Quarter ended September 30, Nine months ended September 30, (in millions) 2018 2017 2018 2017 Debt securities OTTI write-downs included in earnings: Securities of U.S. states and political subdivisions $ — 1 2 9 Mortgage-backed securities: Residential — 1 2 7 Commercial 1 4 15 70 Corporate debt securities — 1 — 21 Other debt securities 4 — 4 — Total debt securities OTTI write-downs included in earnings $ 5 7 23 107 Table 5.9 shows the detail of OTTI write-downs on available-for-sale debt securities included in earnings and the related changes in OCI for the same securities. Table 5.9: OTTI Write-downs Included in Earnings and the Related Changes in OCI Quarter ended September 30, Nine months ended September 30, (in millions) 2018 2017 2018 2017 OTTI on debt securities Recorded as part of gross realized losses: Credit-related OTTI $ 5 6 22 105 Intent-to-sell OTTI — 1 1 2 Total recorded as part of gross realized losses 5 7 23 107 Changes to OCI for losses (reversal of losses) in non-credit-related OTTI (1): Securities of U.S. states and political subdivisions — — (2 ) (5 ) Residential mortgage-backed securities — (1 ) (1 ) (1 ) Commercial mortgage-backed securities (5 ) — (6 ) (47 ) Corporate debt securities — — — 1 Other debt securities — (1 ) — (1 ) Total changes to OCI for non-credit-related OTTI (5 ) (2 ) (9 ) (53 ) Total OTTI losses (reversal of losses) recorded on debt securities $ — 5 14 54 (1) Represents amounts recorded to OCI for impairment of debt securities, due to factors other than credit, that have also had credit-related OTTI write-downs during the period. Increases represent initial or subsequent non-credit-related OTTI on debt securities. Decreases represent partial to full reversal of impairment due to recoveries in the fair value of debt securities due to non-credit factors. Table 5.10 presents a rollforward of the OTTI credit loss that has been recognized in earnings as a write-down of available-for-sale debt securities we still own (referred to as “credit-impaired” debt securities) and do not intend to sell. Recognized credit loss represents the difference between the present value of expected future cash flows discounted using the security’s current effective interest rate and the amortized cost basis of the security prior to considering credit loss. Table 5.10: Rollforward of OTTI Credit Loss Quarter ended September 30, Nine months ended September 30, (in millions) 2018 2017 2018 2017 Credit loss recognized, beginning of period $ 626 1,120 742 1,043 Additions: For securities with initial credit impairments — — — 8 For securities with previous credit impairments 5 6 22 97 Total additions 5 6 22 105 Reductions: For securities sold, matured, or intended/required to be sold (68 ) (96 ) (199 ) (114 ) For recoveries of previous credit impairments (1) — (1 ) (2 ) (5 ) Total reductions (68 ) (97 ) (201 ) (119 ) Credit loss recognized, end of period $ 563 1,029 563 1,029 (1) Recoveries of previous credit impairments result from increases in expected cash flows subsequent to credit loss recognition. Such recoveries are reflected prospectively as interest yield adjustments using the effective interest method.

Loans and Allowance for Credit

Loans and Allowance for Credit Losses	9 Months Ended
	Sep. 30, 2018
Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract]
Loans and Allowance for Credit Losses	Note 6: Loans and Allowance for Credit Losses Table 6.1 presents total loans outstanding by portfolio segment and class of financing receivable. Outstanding balances include a total net reduction of $2.0 billion and $3.9 billion at September 30, 2018 , and December 31, 2017 , respectively, for unearned income, net deferred loan fees, and unamortized discounts and premiums, which among other things, reflect the impact of various loan sales. Table 6.1: Loans Outstanding (in millions) Sep 30, Dec 31, Commercial: Commercial and industrial $ 338,048 333,125 Real estate mortgage 120,403 126,599 Real estate construction 23,690 24,279 Lease financing 19,745 19,385 Total commercial 501,886 503,388 Consumer: Real estate 1-4 family first mortgage 284,273 284,054 Real estate 1-4 family junior lien mortgage 35,330 39,713 Credit card 37,812 37,976 Automobile 46,075 53,371 Other revolving credit and installment 36,924 38,268 Total consumer 440,414 453,382 Total loans $ 942,300 956,770 Our foreign loans are reported by respective class of financing receivable in the table above. Substantially all of our foreign loan portfolio is commercial loans. Loans are classified as foreign primarily based on whether the borrower’s primary address is outside of the United States. Table 6.2 presents total commercial foreign loans outstanding by class of financing receivable. Table 6.2: Commercial Foreign Loans Outstanding (in millions) Sep 30, Dec 31, Commercial foreign loans: Commercial and industrial $ 61,696 60,106 Real estate mortgage 6,891 8,033 Real estate construction 726 655 Lease financing 1,187 1,126 Total commercial foreign loans $ 70,500 69,920 Loan Purchases, Sales, and Transfers Table 6.3 summarizes the proceeds paid or received for purchases and sales of loans and transfers from loans held for investment to mortgages/loans held for sale at lower of cost or fair value. This loan activity also includes participating interests, whereby we receive or transfer a portion of a loan. The table excludes PCI loans and loans for which we have elected the fair value option, including loans originated for sale because their loan activity normally does not impact the allowance for credit losses. Table 6.3: Loan Purchases, Sales, and Transfers 2018 2017 (in millions) Commercial Consumer (1) Total Commercial Consumer (1) Total Quarter ended September 30, Purchases $ 225 4 229 449 — 449 Sales (438 ) (113 ) (551 ) (310 ) (145 ) (455 ) Transfers (to) from MLHFS/LHFS (21 ) (371 ) (392 ) 374 — 374 Nine months ended September 30, Purchases $ 879 11 890 2,418 2 2,420 Sales (1,192 ) (201 ) (1,393 ) (1,649 ) (291 ) (1,940 ) Transfers (to) from MLHFS/LHFS (541 ) (1,996 ) (2,537 ) (284 ) (1 ) (285 ) (1) Excludes activity in government insured/guaranteed real estate 1-4 family first mortgage loans. As servicer, we are able to buy delinquent insured/guaranteed loans out of the Government National Mortgage Association (GNMA) pools, and manage and/or resell them in accordance with applicable requirements. These loans are predominantly insured by the Federal Housing Administration (FHA) or guaranteed by the Department of Veterans Affairs (VA). Accordingly, these loans have limited impact on the allowance for loan losses. Commitments to Lend A commitment to lend is a legally binding agreement to lend funds to a customer, usually at a stated interest rate, if funded, and for specific purposes and time periods. We generally require a fee to extend such commitments. Certain commitments are subject to loan agreements with covenants regarding the financial performance of the customer or borrowing base formulas on an ongoing basis that must be met before we are required to fund the commitment. We may reduce or cancel consumer commitments, including home equity lines and credit card lines, in accordance with the contracts and applicable law. We may, as a representative for other lenders, advance funds or provide for the issuance of letters of credit under syndicated loan or letter of credit agreements. Any advances are generally repaid in less than a week and would normally require default of both the customer and another lender to expose us to loss. These temporary advance arrangements totaled approximately $92 billion and $85 billion at September 30, 2018 and December 31, 2017 , respectively. We issue commercial letters of credit to assist customers in purchasing goods or services, typically for international trade. At September 30, 2018 , and December 31, 2017 , we had $1.1 billion and $982 million , respectively, of outstanding issued commercial letters of credit. We also originate multipurpose lending commitments under which borrowers have the option to draw on the facility for different purposes in one of several forms, including a standby letter of credit. See Note 12 (Guarantees, Pledged Assets and Collateral, and Other Commitments) for additional information on standby letters of credit. When we make commitments, we are exposed to credit risk. The maximum credit risk for these commitments will generally be lower than the contractual amount because a significant portion of these commitments is expected to expire without being used by the customer. In addition, we manage the potential risk in commitments to lend by limiting the total amount of commitments, both by individual customer and in total, by monitoring the size and maturity structure of these commitments and by applying the same credit standards for these commitments as for all of our credit activities. For loans and commitments to lend, we generally require collateral or a guarantee. We may require various types of collateral, including commercial and consumer real estate, automobiles, other short-term liquid assets such as accounts receivable or inventory and long-lived assets, such as equipment and other business assets. Collateral requirements for each loan or commitment may vary based on the loan product and our assessment of a customer’s credit risk according to the specific credit underwriting, including credit terms and structure. The contractual amount of our unfunded credit commitments, including unissued standby and commercial letters of credit, is summarized by portfolio segment and class of financing receivable in Table 6.4 . The table excludes the issued standby and commercial letters of credit and temporary advance arrangements described above. Table 6.4: Unfunded Credit Commitments (in millions) Sep 30, Dec 31, Commercial: Commercial and industrial $ 330,296 326,626 Real estate mortgage 7,042 7,485 Real estate construction 15,198 16,621 Total commercial 352,536 350,732 Consumer: Real estate 1-4 family first mortgage 30,566 29,876 Real estate 1-4 family junior lien mortgage 37,959 38,897 Credit card 109,871 108,465 Other revolving credit and installment 27,832 27,541 Total consumer 206,228 204,779 Total unfunded credit commitments $ 558,764 555,511 Allowance for Credit Losses Table 6.5 presents the allowance for credit losses, which consists of the allowance for loan losses and the allowance for unfunded credit commitments. Table 6.5: Allowance for Credit Losses Quarter ended September 30, Nine months ended September 30, (in millions) 2018 2017 2018 2017 Balance, beginning of period $ 11,110 12,146 11,960 12,540 Provision for credit losses 580 717 1,223 1,877 Interest income on certain impaired loans (1) (42 ) (43 ) (128 ) (137 ) Loan charge-offs: Commercial: Commercial and industrial (209 ) (194 ) (507 ) (608 ) Real estate mortgage (9 ) (21 ) (30 ) (34 ) Real estate construction — — — — Lease financing (15 ) (11 ) (52 ) (31 ) Total commercial (233 ) (226 ) (589 ) (673 ) Consumer: Real estate 1-4 family first mortgage (45 ) (67 ) (141 ) (191 ) Real estate 1-4 family junior lien mortgage (47 ) (70 ) (141 ) (225 ) Credit card (376 ) (337 ) (1,185 ) (1,083 ) Automobile (214 ) (274 ) (730 ) (741 ) Other revolving credit and installment (161 ) (170 ) (505 ) (544 ) Total consumer (843 ) (918 ) (2,702 ) (2,784 ) Total loan charge-offs (1,076 ) (1,144 ) (3,291 ) (3,457 ) Loan recoveries: Commercial: Commercial and industrial 61 69 216 234 Real estate mortgage 10 24 46 68 Real estate construction 2 15 12 27 Lease financing 8 5 18 13 Total commercial 81 113 292 342 Consumer: Real estate 1-4 family first mortgage 70 83 207 216 Real estate 1-4 family junior lien mortgage 56 69 171 205 Credit card 77 60 231 177 Automobile 84 72 279 246 Other revolving credit and installment 28 30 88 94 Total consumer 315 314 976 938 Total loan recoveries 396 427 1,268 1,280 Net loan charge-offs (680 ) (717 ) (2,023 ) (2,177 ) Other (12 ) 6 (76 ) 6 Balance, end of period $ 10,956 12,109 10,956 12,109 Components: Allowance for loan losses $ 10,021 11,078 10,021 11,078 Allowance for unfunded credit commitments 935 1,031 935 1,031 Allowance for credit losses $ 10,956 12,109 10,956 12,109 Net loan charge-offs (annualized) as a percentage of average total loans 0.29 % 0.30 0.29 0.30 Allowance for loan losses as a percentage of total loans 1.06 1.16 1.06 1.16 Allowance for credit losses as a percentage of total loans 1.16 1.27 1.16 1.27 (1) Certain impaired loans with an allowance calculated by discounting expected cash flows using the loan’s effective interest rate over the remaining life of the loan recognize changes in allowance attributable to the passage of time as interest income. Table 6.6 summarizes the activity in the allowance for credit losses by our commercial and consumer portfolio segments. Table 6.6: Allowance Activity by Portfolio Segment 2018 2017 (in millions) Commercial Consumer Total Commercial Consumer Total Quarter ended September 30, Balance, beginning of period $ 6,711 4,399 11,110 6,961 5,185 12,146 Provision (reversal of provision) for credit losses 22 558 580 (9 ) 726 717 Interest income on certain impaired loans (12 ) (30 ) (42 ) (13 ) (30 ) (43 ) Loan charge-offs (233 ) (843 ) (1,076 ) (226 ) (918 ) (1,144 ) Loan recoveries 81 315 396 113 314 427 Net loan charge-offs (152 ) (528 ) (680 ) (113 ) (604 ) (717 ) Other (1 ) (11 ) (12 ) 6 — 6 Balance, end of period $ 6,568 4,388 10,956 6,832 5,277 12,109 Nine months ended September 30, Balance, beginning of period $ 6,632 5,328 11,960 7,394 5,146 12,540 Provision (reversal of provision) for credit losses 280 943 1,223 (195 ) 2,072 1,877 Interest income on certain impaired loans (37 ) (91 ) (128 ) (42 ) (95 ) (137 ) Loan charge-offs (589 ) (2,702 ) (3,291 ) (673 ) (2,784 ) (3,457 ) Loan recoveries 292 976 1,268 342 938 1,280 Net loan charge-offs (297 ) (1,726 ) (2,023 ) (331 ) (1,846 ) (2,177 ) Other (10 ) (66 ) (76 ) 6 — 6 Balance, end of period $ 6,568 4,388 10,956 6,832 5,277 12,109 Table 6.7 disaggregates our allowance for credit losses and recorded investment in loans by impairment methodology. Table 6.7: Allowance by Impairment Methodology Allowance for credit losses Recorded investment in loans (in millions) Commercial Consumer Total Commercial Consumer Total September 30, 2018 Collectively evaluated (1) $ 6,062 3,407 9,469 498,353 420,014 918,367 Individually evaluated (2) 499 981 1,480 3,488 13,504 16,992 PCI (3) 7 — 7 45 6,896 6,941 Total $ 6,568 4,388 10,956 501,886 440,414 942,300 December 31, 2017 Collectively evaluated (1) $ 5,927 4,143 10,070 499,342 425,919 925,261 Individually evaluated (2) 705 1,185 1,890 3,960 14,714 18,674 PCI (3) — — — 86 12,749 12,835 Total $ 6,632 5,328 11,960 503,388 453,382 956,770 (1) Represents loans collectively evaluated for impairment in accordance with Accounting Standards Codification (ASC) 450-20, Loss Contingencies (formerly FAS 5), and pursuant to amendments by ASU 2010-20 regarding allowance for non-impaired loans. (2) Represents loans individually evaluated for impairment in accordance with ASC 310-10, Receivables (formerly FAS 114), and pursuant to amendments by ASU 2010-20 regarding allowance for impaired loans. (3) Represents the allowance and related loan carrying value determined in accordance with ASC 310-30 , Receivables – Loans and Debt Securities Acquired with Deteriorated Credit Quality (formerly SOP 03-3) and pursuant to amendments by ASU 2010-20 regarding allowance for PCI loans. Credit Quality We monitor credit quality by evaluating various attributes and utilize such information in our evaluation of the appropriateness of the allowance for credit losses. The following sections provide the credit quality indicators we most closely monitor. The credit quality indicators are generally based on information as of our financial statement date, with the exception of updated Fair Isaac Corporation (FICO) scores and updated loan-to-value (LTV)/combined LTV (CLTV). We obtain FICO scores at loan origination and the scores are generally updated at least quarterly, except in limited circumstances, including compliance with the Fair Credit Reporting Act (FCRA). Generally, the LTV and CLTV indicators are updated in the second month of each quarter, with updates no older than June 30, 2018 . See the “Purchased Credit-Impaired Loans” section in this Note for credit quality information on our PCI portfolio. COMMERCIAL CREDIT QUALITY INDICATORS In addition to monitoring commercial loan concentration risk, we manage a consistent process for assessing commercial loan credit quality. Generally, commercial loans are subject to individual risk assessment using our internal borrower and collateral quality ratings. Our ratings are aligned to Pass and Criticized categories. The Criticized category includes Special Mention, Substandard, and Doubtful categories which are defined by bank regulatory agencies. Table 6.8 provides a breakdown of outstanding commercial loans by risk category. Of the $15.7 billion in criticized commercial and industrial loans and $4.7 billion in criticized commercial real estate (CRE) loans at September 30, 2018 , $1.6 billion and $647 million , respectively, have been placed on nonaccrual status and written down to net realizable collateral value. Table 6.8: Commercial Loans by Risk Category (in millions) Commercial and industrial Real estate mortgage Real estate construction Lease financing Total September 30, 2018 By risk category: Pass $ 322,264 115,970 23,419 18,751 480,404 Criticized 15,739 4,433 271 994 21,437 Total commercial loans (excluding PCI) 338,003 120,403 23,690 19,745 501,841 Total commercial PCI loans (carrying value) 45 — — — 45 Total commercial loans $ 338,048 120,403 23,690 19,745 501,886 December 31, 2017 By risk category: Pass $ 316,431 122,312 23,981 18,162 480,886 Criticized 16,608 4,287 298 1,223 22,416 Total commercial loans (excluding PCI) 333,039 126,599 24,279 19,385 503,302 Total commercial PCI loans (carrying value) 86 — — — 86 Total commercial loans $ 333,125 126,599 24,279 19,385 503,388 Table 6.9 provides past due information for commercial loans, which we monitor as part of our credit risk management practices. Table 6.9: Commercial Loans by Delinquency Status (in millions) Commercial and industrial Real estate mortgage Real estate construction Lease financing Total September 30, 2018 By delinquency status: Current-29 days past due (DPD) and still accruing $ 336,004 119,445 23,506 19,494 498,449 30-89 DPD and still accruing 402 299 140 155 996 90+ DPD and still accruing 42 56 — — 98 Nonaccrual loans 1,555 603 44 96 2,298 Total commercial loans (excluding PCI) 338,003 120,403 23,690 19,745 501,841 Total commercial PCI loans (carrying value) 45 — — — 45 Total commercial loans $ 338,048 120,403 23,690 19,745 501,886 December 31, 2017 By delinquency status: Current-29 DPD and still accruing $ 330,319 125,642 24,107 19,148 499,216 30-89 DPD and still accruing 795 306 135 161 1,397 90+ DPD and still accruing 26 23 — — 49 Nonaccrual loans 1,899 628 37 76 2,640 Total commercial loans (excluding PCI) 333,039 126,599 24,279 19,385 503,302 Total commercial PCI loans (carrying value) 86 — — — 86 Total commercial loans $ 333,125 126,599 24,279 19,385 503,388 CONSUMER CREDIT QUALITY INDICATORS We have various classes of consumer loans that present unique risks. Loan delinquency, FICO credit scores and LTV for loan types are common credit quality indicators that we monitor and utilize in our evaluation of the appropriateness of the allowance for credit losses for the consumer portfolio segment. Many of our loss estimation techniques used for the allowance for credit losses rely on delinquency-based models; therefore, delinquency is an important indicator of credit quality and the establishment of our allowance for credit losses. Table 6.10 provides the outstanding balances of our consumer portfolio by delinquency status. Table 6.10: Consumer Loans by Delinquency Status (in millions) Real estate 1-4 family first mortgage Real estate 1-4 family junior lien mortgage Credit card Automobile Other revolving credit and installment Total September 30, 2018 By delinquency status: Current-29 DPD $ 261,118 34,551 36,871 44,661 36,590 413,791 30-59 DPD 1,498 253 284 1,005 119 3,159 60-89 DPD 531 126 197 300 94 1,248 90-119 DPD 232 73 173 108 74 660 120-179 DPD 239 82 286 1 24 632 180+ DPD 891 227 1 — 23 1,142 Government insured/guaranteed loans (1) 12,886 — — — — 12,886 Total consumer loans (excluding PCI) 277,395 35,312 37,812 46,075 36,924 433,518 Total consumer PCI loans (carrying value) 6,878 18 — — — 6,896 Total consumer loans $ 284,273 35,330 37,812 46,075 36,924 440,414 December 31, 2017 By delinquency status: Current-29 DPD $ 251,786 38,746 36,996 51,445 37,885 416,858 30-59 DPD 1,893 336 287 1,385 155 4,056 60-89 DPD 742 163 201 392 93 1,591 90-119 DPD 369 103 192 146 80 890 120-179 DPD 308 95 298 3 30 734 180+ DPD 1,091 243 2 — 25 1,361 Government insured/guaranteed loans (1) 15,143 — — — — 15,143 Total consumer loans (excluding PCI) 271,332 39,686 37,976 53,371 38,268 440,633 Total consumer PCI loans (carrying value) 12,722 27 — — — 12,749 Total consumer loans $ 284,054 39,713 37,976 53,371 38,268 453,382 (1) Represents loans whose repayments are predominantly insured by the FHA or guaranteed by the VA. Loans insured/guaranteed by the FHA/VA and 90+ DPD totaled $7.9 billion at September 30, 2018 , compared with $10.5 billion at December 31, 2017 . Of the $2.4 billion of consumer loans not government insured/guaranteed that are 90 days or more past due at September 30, 2018 , $835 million was accruing, compared with $3.0 billion past due and $1.0 billion accruing at December 31, 2017 . Real estate 1-4 family first mortgage loans 180 days or more past due totaled $891 million , or 0.3% of total first mortgages (excluding PCI), at September 30, 2018 , compared with $1.1 billion , or 0.4% , at December 31, 2017 . Table 6.11 provides a breakdown of our consumer portfolio by FICO. Most of the scored consumer portfolio has an updated FICO of 680 and above, reflecting a strong current borrower credit profile. FICO is not available for certain loan types, or may not be required if we deem it unnecessary due to strong collateral and other borrower attributes. Substantially all loans not requiring a FICO score are securities-based loans originated through retail brokerage, and totaled $9.0 billion at September 30, 2018 , and $8.5 billion at December 31, 2017 . Table 6.11: Consumer Loans by FICO (in millions) Real estate 1-4 family first mortgage (1) Real estate 1-4 family junior lien mortgage (1) Credit card Automobile Other revolving credit and installment Total September 30, 2018 By FICO: < 600 $ 4,363 1,485 3,476 7,237 753 17,314 600-639 3,017 1,044 3,005 4,546 785 12,397 640-679 5,840 1,968 5,504 6,383 1,749 21,444 680-719 13,813 4,073 7,553 7,524 3,246 36,209 720-759 27,330 5,487 8,223 6,991 4,728 52,759 760-799 57,101 6,494 6,470 6,008 5,863 81,936 800+ 147,812 13,401 3,040 7,252 8,276 179,781 No FICO available 5,233 1,360 541 134 2,568 9,836 FICO not required — — — — 8,956 8,956 Government insured/guaranteed loans (1) 12,886 — — — — 12,886 Total consumer loans (excluding PCI) 277,395 35,312 37,812 46,075 36,924 433,518 Total consumer PCI loans (carrying value) 6,878 18 — — — 6,896 Total consumer loans $ 284,273 35,330 37,812 46,075 36,924 440,414 December 31, 2017 By FICO: < 600 $ 5,145 1,768 3,525 8,858 863 20,159 600-639 3,487 1,253 3,101 5,615 904 14,360 640-679 6,789 2,387 5,690 7,696 1,959 24,521 680-719 14,977 4,797 7,628 8,825 3,582 39,809 720-759 27,926 6,246 8,097 7,806 5,089 55,164 760-799 55,590 7,323 6,372 6,468 6,257 82,010 800+ 136,729 15,144 2,994 7,845 8,455 171,167 No FICO available 5,546 768 569 258 2,648 9,789 FICO not required — — — — 8,511 8,511 Government insured/guaranteed loans (1) 15,143 — — — — 15,143 Total consumer loans (excluding PCI) 271,332 39,686 37,976 53,371 38,268 440,633 Total consumer PCI loans (carrying value) 12,722 27 — — — 12,749 Total consumer loans $ 284,054 39,713 37,976 53,371 38,268 453,382 (1) Represents loans whose repayments are predominantly insured by the FHA or guaranteed by the VA. LTV refers to the ratio comparing the loan’s unpaid principal balance to the property’s collateral value. CLTV refers to the combination of first mortgage and junior lien mortgage (including unused line amounts for credit line products) ratios. LTVs and CLTVs are updated quarterly using a cascade approach which first uses values provided by automated valuation models (AVMs) for the property. If an AVM is not available, then the value is estimated using the original appraised value adjusted by the change in Home Price Index (HPI) for the property location. If an HPI is not available, the original appraised value is used. The HPI value is normally the only method considered for high value properties, generally with an original value of $1 million or more, as the AVM values have proven less accurate for these properties. Table 6.12 shows the most updated LTV and CLTV distribution of the real estate 1-4 family first and junior lien mortgage loan portfolios. We consider the trends in residential real estate markets as we monitor credit risk and establish our allowance for credit losses. In the event of a default, any loss should be limited to the portion of the loan amount in excess of the net realizable value of the underlying real estate collateral value. Certain loans do not have an LTV or CLTV due to industry data availability and portfolios acquired from or serviced by other institutions. Table 6.12: Consumer Loans by LTV/CLTV September 30, 2018 December 31, 2017 (in millions) Real estate 1-4 family first mortgage by LTV Real estate 1-4 family junior lien mortgage by CLTV Total Real estate 1-4 family first mortgage by LTV Real estate 1-4 family junior lien mortgage by CLTV Total By LTV/CLTV: 0-60% $ 147,186 15,949 163,135 133,902 16,301 150,203 60.01-80% 102,473 11,344 113,817 104,639 12,918 117,557 80.01-100% 11,983 5,175 17,158 13,924 6,580 20,504 100.01-120% (1) 1,353 1,774 3,127 1,868 2,427 4,295 > 120% (1) 536 649 1,185 783 1,008 1,791 No LTV/CLTV available 978 421 1,399 1,073 452 1,525 Government insured/guaranteed loans (2) 12,886 — 12,886 15,143 — 15,143 Total consumer loans (excluding PCI) 277,395 35,312 312,707 271,332 39,686 311,018 Total consumer PCI loans (carrying value) 6,878 18 6,896 12,722 27 12,749 Total consumer loans $ 284,273 35,330 319,603 284,054 39,713 323,767 (1) Reflects total loan balances with LTV/CLTV amounts in excess of 100%. In the event of default, the loss content would generally be limited to only the amount in excess of 100% LTV/CLTV. (2) Represents loans whose repayments are predominantly insured by the FHA or guaranteed by the VA. NONACCRUAL LOANS Table 6.13 provides loans on nonaccrual status. PCI loans are excluded from this table because they continue to earn interest from accretable yield, independent of performance in accordance with their contractual terms. Table 6.13: Nonaccrual Loans (in millions) Sep 30, Dec 31, Commercial: Commercial and industrial $ 1,555 1,899 Real estate mortgage 603 628 Real estate construction 44 37 Lease financing 96 76 Total commercial 2,298 2,640 Consumer: Real estate 1-4 family first mortgage (1) 3,605 4,122 Real estate 1-4 family junior lien mortgage 984 1,086 Automobile 118 130 Other revolving credit and installment 48 58 Total consumer 4,755 5,396 Total nonaccrual loans (excluding PCI) $ 7,053 8,036 (1) Includes MLHFS of $132 million and $136 million at September 30, 2018 , and December 31, 2017 , respectively. LOANS IN PROCESS OF FORECLOSURE Our recorded investment in consumer mortgage loans collateralized by residential real estate property that are in process of foreclosure was $4.9 billion and $6.3 billion at September 30, 2018 and December 31, 2017 , respectively, which included $3.5 billion and $4.0 billion , respectively, of loans that are government insured/guaranteed. Under Bureau of Consumer Financial Protection guidelines, we do not commence the foreclosure process on consumer real estate loans until after the loan is 120 days delinquent. Foreclosure procedures and timelines vary depending on whether the property address resides in a judicial or non-judicial state. Judicial states require the foreclosure to be processed through the state’s courts while non-judicial states are processed without court intervention. Foreclosure timelines vary according to state law. LOANS 90 DAYS OR MORE PAST DUE AND STILL ACCRUING Certain loans 90 days or more past due as to interest or principal are still accruing, because they are (1) well-secured and in the process of collection or (2) real estate 1-4 family mortgage loans or consumer loans exempt under regulatory rules from being classified as nonaccrual until later delinquency, usually 120 days past due. PCI loans of $567 million at September 30, 2018 , and $1.4 billion at December 31, 2017 , are not included in these past due and still accruing loans even when they are 90 days or more contractually past due. These PCI loans are considered to be accruing because they continue to earn interest from accretable yield, independent of performance in accordance with their contractual terms. Table 6.14 shows non-PCI loans 90 days or more past due and still accruing by class for loans not government insured/guaranteed. Table 6.14: Loans 90 Days or More Past Due and Still Accruing (in millions) Sep 30, 2018 Dec 31, 2017 Total (excluding PCI): $ 9,209 11,997 Less: FHA insured/VA guaranteed (1)(2) 8,276 10,934 Total, not government insured/guaranteed $ 933 1,063 By segment and class, not government insured/guaranteed: Commercial: Commercial and industrial $ 42 26 Real estate mortgage 56 23 Total commercial 98 49 Consumer: Real estate 1-4 family first mortgage (2) 129 219 Real estate 1-4 family junior lien mortgage (2) 32 60 Credit card 460 492 Automobile 108 143 Other revolving credit and installment 106 100 Total consumer 835 1,014 Total, not government insured/guaranteed $ 933 1,063 (1) Represents loans whose repayments are predominantly insured by the FHA or guaranteed by the VA. (2) Includes mortgage loans held for sale 90 days or more past due and still accruing. IMPAIRED LOANS Table 6.15 summarizes key information for impaired loans. Our impaired loans predominantly include loans on nonaccrual status in the commercial portfolio segment and loans modified in a TDR, whether on accrual or nonaccrual status. These impaired loans generally have estimated losses which are included in the allowance for credit losses. We have impaired loans with no allowance for credit losses when loss content has been previously recognized through charge-offs and we do not anticipate additional charge-offs or losses, or certain loans are currently performing in accordance with their terms and for which no loss has been estimated. Impaired loans exclude PCI loans. Table 6.15 includes trial modifications that totaled $163 million at September 30, 2018 , and $194 million at December 31, 2017 . For additional information on our impaired loans and allowance for credit losses, see Note 1 (Summary of Significant Accounting Policies) in our 2017 Form 10-K. Table 6.15: Impaired Loans Summary Recorded investment (in millions) Unpaid principal balance (1) Impaired loans Impaired loans with related allowance for credit losses Related allowance for credit losses September 30, 2018 Commercial: Commercial and industrial $ 3,102 2,200 1,806 321 Real estate mortgage 1,311 1,107 1,064 142 Real estate construction 111 63 48 10 Lease financing 148 118 118 26 Total commercial 4,672 3,488 3,036 499 Consumer: Real estate 1-4 family first mortgage 12,719 11,087 4,747 571 Real estate 1-4 family junior lien mortgage 1,950 1,748 1,216 198 Credit card 431 431 431 167 Automobile 157 91 45 8 Other revolving credit and installment 155 147 129 37 Total consumer (2) 15,412 13,504 6,568 981 Total impaired loans (excluding PCI) $ 20,084 16,992 9,604 1,480 December 31, 2017 Commercial: Commercial and industrial $ 3,577 2,568 2,310 462 Real estate mortgage 1,502 1,239 1,207 211 Real estate construction 95 54 45 9 Lease financing 132 99 89 23 Total commercial 5,306 3,960 3,651 705 Consumer: Real estate 1-4 family first mortgage 14,020 12,225 6,060 770 Real estate 1-4 family junior lien mortgage 2,135 1,918 1,421 245 Credit card 356 356 356 136 Automobile 157 87 34 5 Other revolving credit and installment 136 128 117 29 Total consumer (2) 16,804 14,714 7,988 1,185 Total impaired loans (excluding PCI) $ 22,110 18,674 11,639 1,890 (1) Excludes the unpaid principal balance for loans that have been fully charged off or otherwise have zero recorded investment. (2) Includes the recorded investment of $1.3 billion at September 30, 2018 and $1.4 billion at December 31, 2017 , of government insured/guaranteed loans that are predominantly insured by the FHA or guaranteed by the VA and generally do not have an allowance. Impaired loans may also have limited, if any, allowance when the recorded investment of the loan approximates estimated net realizable value as a result of charge-offs prior to a TDR modification. Commitments to lend additional funds on loans whose terms have been modified in a TDR amounted to $543 million and $579 million at September 30, 2018 and December 31, 2017 , respectively. Table 6.16 provides the average recorded investment in impaired loans and the amount of interest income recognized on impaired loans by portfolio segment and class. Table 6.16: Average Recorded Investment in Impaired Loans Quarter ended September 30, Nine months ended September 30, 2018 2017 2018 2017 (in millions) Average recorded investment Recognized interest income Average recorded investment Recognized interest income Average recorded investment Recognized interest income Average recorded investment Recognized interest income Commercial: Commercial and industrial $ 2,325 59 3,208 22 2,316 138 3,460 91 Real estate mortgage 1,172 16 1,293 19 1,225 66 1,351 70 Real estate construction 66 2 58 — 62 4 69 3 Lease financing 117 — 105 1 127 1 110 1 Total commercial 3,680 77 4,664 42 3,730 209 4,990 165 Consumer: Real estate 1-4 family first mortgage 11,318 165 13,044 180 11,718 504 13,594 555 Real estate 1-4 family junior lien mortgage 1,775 29 2,009 30 1,832 87 2,072 92 Credit card 421 14 326 9 396 36 314 26 Automobile 87 2 86 2 85 8 84 8 Other revolving credit and installment 145 2 123 2 139 7 114 6 Total consumer 13,746 212 15,588 223 14,170 642 16,178 687 Total impaired loans (excluding PCI) $ 17,426 289 20,252 265 17,900 851 21,168 852 Interest income: Cash basis of accounting $ 92 64 257 219 Other (1) 197 201 594 633 Total interest income $ 289 265 851 852 (1) Includes interest recognized on accruing TDRs, interest recognized related to certain impaired loans which have an allowance calculated using discounting, and amortization of purchase accounting adjustments related to certain impaired loans. TROUBLED DEBT RESTRUCTURINGS (TDRs) When, for economic or legal reasons related to a borrower’s financial difficulties, we grant a concession for other than an insignificant period of time to a borrower that we would not otherwise consider, the related loan is classified as a TDR, the balance of which totaled $16.2 billion and $17.8 billion at September 30, 2018 and December 31, 2017 , respectively. We do not consider loan resolutions such as foreclosure or short sale to be a TDR. We may require some consumer borrowers experiencing financial difficulty to make trial payments generally for a period of three to four months, according to the terms of a planned permanent modification, to determine if they can perform according to those terms. These arrangements represent trial modifications, which we classify and account for as TDRs. While loans are in trial payment programs, their original terms are not considered modified and they continue to advance through delinquency status and accrue interest according to their original

Equity Securities

Equity Securities	9 Months Ended
	Sep. 30, 2018
Equity Securities [Abstract]
Equity Securities	Note 7: Equity Securities Table 7.1 provides a summary of our equity securities by business purpose and accounting model, including equity securities with readily determinable fair values (marketable) and those without readily determinable fair values (nonmarketable). Table 7.1: Equity Securities Sep 30, Dec 31, (in millions) 2018 2017 Held for trading at fair value: Marketable equity securities $ 26,138 30,004 Not held for trading: Fair value: Marketable equity securities (1) 5,705 4,356 Nonmarketable equity securities (2) 6,479 4,867 Total equity securities at fair value 12,184 9,223 Equity method: LIHTC (3) 10,453 10,269 Private equity 3,838 3,839 Tax-advantaged renewable energy 1,967 1,950 New market tax credit and other 259 294 Total equity method 16,517 16,352 Other: Federal bank stock and other at cost (4) 5,467 5,828 Private equity (5) 1,449 1,090 Total equity securities not held for trading 35,617 32,493 Total equity securities $ 61,755 62,497 (1) Includes $3.6 billion and $3.7 billion at September 30, 2018 , and December 31, 2017 , respectively, related to securities held as economic hedges of our deferred compensation plan obligations. (2) Includes $6.3 billion and $4.9 billion at September 30, 2018 , and December 31, 2017 , respectively, related to investments for which we elected the fair value option. See Note 15 (Fair Value of Assets and Liabilities) for additional information. (3) Represents low-income housing tax credit investments. (4) Includes $5.4 billion at both September 30, 2018 , and December 31, 2017 , related to investments in Federal Reserve Bank and Federal Home Loan Bank stock. (5) Represents nonmarketable equity securities for which we have elected to account for the security under the measurement alternative. Equity Securities Held for Trading Equity securities held for trading purposes are marketable equity securities traded on organized exchanges. These securities, which are held as part of our customer accommodation trading activities, are carried at fair value with changes in fair value reflected in net gains from trading activities. More information on these activities can be found in Note 4 (Trading Activities) to Financial Statements in this Report. Equity Securities Not Held for Trading We also hold equity securities unrelated to trading activities. These securities include private equity and tax credit investments, securities held as economic hedges or to meet regulatory requirements (for example, Federal Reserve Bank and Federal Home Loan Bank stock). Equity securities not held for trading purposes are accounted for at either fair value, equity method, cost or the measurement alternative. FAIR VALUE Equity securities accounted for using the fair value method are recorded at fair value with changes in fair value reflected in net gains from equity securities. Marketable equity securities held for purposes other than trading primarily consist of exchange - traded equity funds held to economically hedge obligations related to our deferred compensation plans and to a lesser extent other holdings of publicly traded equity securities held for investment purposes. Nonmarketable equity securities represent securities that do not have a readily determinable fair value for which we have elected to account for using the fair value method. Substantially all of these nonmarketable equity securities are economically hedged with equity derivatives. EQUITY METHOD Under the equity method of accounting, we carry the security at cost adjusted for our share of the investee’s earnings less any impairment write-downs. Our equity method investments consist of tax credit and private equity securities, the majority of which are our low-income housing tax credit (LIHTC) investments. We invest in affordable housing projects that qualify for the LIHTC, which is designed to promote private development of low-income housing. These investments generate a return mostly through realization of federal tax credit and other tax benefits. In the third quarter and first nine months of 2018 , we recognized pre-tax losses of $283 million and $850 million , respectively, related to our LIHTC investments, compared with $227 million and $684 million , respectively, for the same periods a year ago. These losses were recognized in other noninterest income. We also recognized total tax benefits of $352 million and $1.1 billion in the third quarter and first nine months of 2018 , which included tax credits recorded to income taxes of $282 million and $853 million for the same periods, respectively. In the third quarter and first nine months of 2017 , total tax benefits were $360 million and $1.1 billion , respectively, which included tax credits of $275 million and $796 million for the same periods, respectively. We are periodically required to provide additional financial support during the investment period. Our liability for unfunded commitments was $3.4 billion at September 30, 2018 , and $3.6 billion at December 31, 2017 . Substantially all of this liability is expected to be paid over the next three years . This liability is included in long-term debt. OTHER The remaining portion of our nonmarketable equity securities portfolio consists of securities accounted for using the cost method or measurement alternative. Cost method securities are held at cost less impairment. If impaired, the carrying value is written down to fair value. The measurement alternative is similar to the cost method of accounting, except the carrying value is adjusted up or down to fair value through net gains from equity securities upon the occurrence of orderly observable transactions in the same or similar security of the same issuer. Impairment write-downs are recorded on these securities when the carrying value of these securities exceeds the fair value of the investment or we identify possible indicators of impairment. Realized Gains and Losses Table 7.2 provides a summary of the net gains and losses for equity securities. Gains and losses for securities held for trading are reported in net gains from trading activities. Table 7.2: Net Gains (Losses) from Equity Securities Quarter ended September 30, Nine months ended September 30, (in millions) 2018 2017 2018 2017 Net gains (losses) from equity securities carried at fair value: Marketable equity securities $ 103 231 139 701 Nonmarketable equity securities 822 514 1,525 1,208 Total equity securities carried at fair value 925 745 1,664 1,909 Net gains (losses) from nonmarketable equity securities not carried at fair value: Impairment write-downs (45 ) (83 ) (302 ) (181 ) Net unrealized gains related to measurement alternative observable transactions 51 — 314 — Net realized gains on sale 204 175 1,101 565 All other — 16 34 78 Total nonmarketable equity securities not carried at fair value 210 108 1,147 462 Net losses from economic hedge derivatives (1) (719 ) (490 ) (1,317 ) (1,164 ) Total net gains from equity securities $ 416 363 1,494 1,207 (1) Includes net gains (losses) on derivatives not designated as hedging instruments. Measurement Alternative Table 7.3 provides additional information about the impairment write-downs and observable price adjustments related to nonmarketable equity securities accounted for under the measurement alternative. Gains and losses related to these adjustments are also included in Table 7.2. Table 7.3: Measurement Alternative Quarter ended September 30, Nine months ended September 30, (in millions) 2018 2018 Net gains (losses) recognized in earnings during the period: Gross unrealized gains due to observable price changes $ 68 339 Gross unrealized losses due to observable price changes (17 ) (25 ) Impairment write-downs (6 ) (18 ) Realized net gains from sale 186 277 Total net gains recognized during the period $ 231 573 The cumulative gross unrealized gains and (losses) due to observable price changes as of September 30, 2018 , were $312 million and $(25) million , respectively. Cumulative impairment losses as of September 30, 2018 , were $18 million . These cumulative amounts represent carrying value adjustments to equity securities accounted for under the measurement alternative that were recognized on the balance sheet as of September 30, 2018 .

Other Assets

Other Assets	9 Months Ended
	Sep. 30, 2018
Other Assets [Abstract]
Other Assets	Note 8: Other Assets Table 8.1 presents the components of other assets. Table 8.1: Other Assets (in millions) Sep 30, Dec 31, Corporate/bank-owned life insurance $ 19,677 19,549 Accounts receivable (1) 32,965 39,127 Interest receivable 5,986 5,688 Core deposit intangibles 192 769 Customer relationship and other amortized intangibles 620 841 Foreclosed assets: Residential real estate: Government insured/guaranteed (1) 87 120 Non-government insured/guaranteed 230 252 Non-residential real estate 205 270 Operating lease assets 9,329 9,666 Due from customers on acceptances 257 177 Other 8,700 13,785 Total other assets $ 78,248 90,244 (1) Certain government-guaranteed residential real estate mortgage loans upon foreclosure are included in Accounts receivable. Both principal and interest related to these foreclosed real estate assets are collectible because the loans were predominantly insured by the FHA or guaranteed by the VA. For more information on the classification of certain government-guaranteed mortgage loans upon foreclosure, see Note 1 (Summary of Significant Accounting Policies) to Financial Statements in our 2017 10-K.

Securitizations and Variable In

Securitizations and Variable Interest Entities	9 Months Ended
	Sep. 30, 2018
Securitizations and Variable Interest Entities [Abstract]
Securitizations and Variable Interest Entities	Note 9: Securitizations and Variable Interest Entities Involvement with Special Purpose Entities (SPEs) In the normal course of business, we enter into various types of on- and off-balance sheet transactions with SPEs, which are corporations, trusts, limited liability companies or partnerships that are established for a limited purpose. Generally, SPEs are formed in connection with securitization transactions and are considered variable interest entities (VIEs). For further description of our involvement with SPEs, see Note 8 (Securitizations and Variable Interest Entities) to Financial Statements in our 2017 Form 10-K. We have segregated our involvement with VIEs between those VIEs which we consolidate, those which we do not consolidate and those for which we account for the transfers of financial assets as secured borrowings. Secured borrowings are transactions involving transfers of our financial assets to third parties that are accounted for as financings with the assets pledged as collateral. Accordingly, the transferred assets remain recognized on our balance sheet. Subsequent tables within this Note further segregate these transactions by structure type. Table 9.1 provides the classifications of assets and liabilities in our balance sheet for our transactions with VIEs. Table 9.1: Balance Sheet Transactions with VIEs (in millions) VIEs that we do not consolidate VIEs that we consolidate Transfers that we account for as secured borrowings Total September 30, 2018 Cash $ — 112 — 112 Interest-earning deposits with banks — 8 — 8 Debt securities: Trading debt securities 1,973 — 200 2,173 Available-for-sale debt securities (1) 2,806 — 338 3,144 Held-to-maturity debt securities 499 — — 499 Loans 1,504 12,749 96 14,349 Mortgage servicing rights 15,930 — — 15,930 Derivative assets 43 — — 43 Equity securities 10,572 61 — 10,633 Other assets — 210 7 217 Total assets 33,327 13,140 641 47,108 Short-term borrowings — — 512 512 Derivative liabilities 92 — (2) — 92 Accrued expenses and other liabilities 242 154 (2) 9 405 Long-term debt 3,428 871 (2) 97 4,396 Total liabilities 3,762 1,025 618 5,405 Noncontrolling interests — 37 — 37 Net assets $ 29,565 12,078 23 41,666 December 31, 2017 Cash $ — 116 — 116 Interest-earning deposits with banks — 371 — 371 Debt securities: Trading debt securities 1,305 — 201 1,506 Available-for-sale debt securities (1) 3,288 — 358 3,646 Held-to-maturity debt securities 485 — — 485 Loans 4,274 12,482 110 16,866 Mortgage servicing rights 13,628 — — 13,628 Derivative assets 44 — — 44 Equity securities 10,740 306 — 11,046 Other assets — 342 6 348 Total assets 33,764 13,617 675 48,056 Short-term borrowings — — 522 522 Derivative liabilities 106 5 (2) — 111 Accrued expenses and other liabilities 244 132 (2) 10 386 Long-term debt 3,590 1,479 (2) 111 5,180 Total liabilities 3,940 1,616 643 6,199 Noncontrolling interests — 283 — 283 Net assets $ 29,824 11,718 32 41,574 (1) Excludes certain debt securities related to loans serviced for the Federal National Mortgage Association (FNMA), Federal Home Loan Mortgage Corporation (FHLMC) and GNMA. (2) There were no VIE liabilities with recourse to the general credit of Wells Fargo for the periods presented. Transactions with Unconsolidated VIEs Our transactions with unconsolidated VIEs include securitizations of residential mortgage loans, CRE loans, student loans, automobile loans and leases, certain dealer floorplan loans; investment and financing activities involving collateralized debt obligations (CDOs) backed by asset-backed and CRE securities, tax credit structures, collateralized loan obligations (CLOs) backed by corporate loans, and other types of structured financing. We have various forms of involvement with VIEs, including servicing, holding senior or subordinated interests, entering into liquidity arrangements, credit default swaps and other derivative contracts. Involvements with these unconsolidated VIEs are recorded on our balance sheet in debt and equity securities, loans, MSRs, derivative assets and liabilities, other assets, other liabilities, and long-term debt, as appropriate. Table 9.2 provides a summary of unconsolidated VIEs with which we have significant continuing involvement, but we are not the primary beneficiary. We do not consider our continuing involvement in an unconsolidated VIE to be significant when it relates to third-party sponsored VIEs for which we were not the transferor (unless we are servicer and have other significant forms of involvement) or if we were the sponsor only or sponsor and servicer but do not have any other forms of significant involvement. Significant continuing involvement includes transactions where we were the sponsor or transferor and have other significant forms of involvement. Sponsorship includes transactions with unconsolidated VIEs where we solely or materially participated in the initial design or structuring of the entity or marketing of the transaction to investors. When we transfer assets to a VIE and account for the transfer as a sale, we are considered the transferor. We consider investments in securities (other than those held temporarily in trading), loans, guarantees, liquidity agreements, written options and servicing of collateral to be other forms of involvement that may be significant. We have excluded certain transactions with unconsolidated VIEs from the balances presented in the following table where we have determined that our continuing involvement is not significant due to the temporary nature and size of our variable interests, because we were not the transferor or because we were not involved in the design of the unconsolidated VIEs. We also exclude from the table secured borrowing transactions with unconsolidated VIEs (for information on these transactions, see the Transactions with Consolidated VIEs and Secured Borrowings section in this Note). Table 9.2: Unconsolidated VIEs Carrying value – asset (liability) (in millions) Total VIE assets Debt and equity interests (1) Servicing assets Derivatives Other commitments and guarantees Net assets September 30, 2018 Residential mortgage loan securitizations: Conforming (2) $ 1,174,883 2,291 14,998 — (185 ) 17,104 Other/nonconforming 11,158 458 60 — — 518 Commercial mortgage securitizations 151,503 2,463 872 (92 ) (37 ) 3,206 Collateralized debt obligations: Debt securities 681 — — 5 (20 ) (15 ) Loans (3) — — — — — — Asset-based finance structures 445 330 — — — 330 Tax credit structures 31,547 11,511 — — (3,428 ) 8,083 Collateralized loan obligations 2 — — — — — Investment funds 221 51 — — — 51 Other (4) 1,738 250 — 38 — 288 Total $ 1,372,178 17,354 15,930 (49 ) (3,670 ) 29,565 Maximum exposure to loss Debt and equity interests (1) Servicing assets Derivatives Other commitments and guarantees Total exposure Residential mortgage loan securitizations: Conforming $ 2,291 14,998 — 1,146 18,435 Other/nonconforming 458 60 — — 518 Commercial mortgage securitizations 2,463 872 92 10,954 14,381 Collateralized debt obligations: Debt securities — — 5 20 25 Loans (3) — — — — — Asset-based finance structures 330 — — 71 401 Tax credit structures 11,511 — — 1,140 12,651 Collateralized loan obligations — — — — — Investment funds 51 — — — 51 Other (4) 250 — 55 157 462 Total $ 17,354 15,930 152 13,488 46,924 (continued on following page) (continued from previous page) Carrying value – asset (liability) (in millions) Total VIE assets Debt and equity interests (1) Servicing assets Derivatives Other commitments and guarantees Net assets December 31, 2017 Residential mortgage loan securitizations: Conforming (2) $ 1,169,410 2,100 12,665 — (190 ) 14,575 Other/nonconforming 14,175 598 73 — — 671 Commercial mortgage securitizations 144,650 2,198 890 28 (34 ) 3,082 Collateralized debt obligations: Debt securities 1,031 — — 5 (20 ) (15 ) Loans (3) 1,481 1,443 — — — 1,443 Asset-based finance structures 2,333 1,867 — — — 1,867 Tax credit structures 31,852 11,258 — — (3,590 ) 7,668 Collateralized loan obligations 23 1 — — — 1 Investment funds 225 50 — — — 50 Other (4) 2,257 577 — (95 ) — 482 Total $ 1,367,437 20,092 13,628 (62 ) (3,834 ) 29,824 Maximum exposure to loss Debt and equity interests (1) Servicing assets Derivatives Other commitments and guarantees Total exposure Residential mortgage loan securitizations: Conforming $ 2,100 12,665 — 1,137 15,902 Other/nonconforming 598 73 — — 671 Commercial mortgage securitizations 2,198 890 42 10,202 13,332 Collateralized debt obligations: Debt securities — — 5 20 25 Loans (3) 1,443 — — — 1,443 Asset-based finance structures 1,867 — — 71 1,938 Tax credit structures 11,258 — — 1,175 12,433 Collateralized loan obligations 1 — — — 1 Investment funds 50 — — — 50 Other (4) 577 — 120 157 854 Total $ 20,092 13,628 167 12,762 46,649 (1) Includes total equity interests of $10.6 billion and $10.7 billion at September 30, 2018 , and December 31, 2017 , respectively. Also includes debt interests in the form of both loans and securities. Excludes certain debt securities held related to loans serviced for FNMA, FHLMC and GNMA. (2) Excludes assets and related liabilities with a recorded carrying value on our balance sheet of $1.0 billion and $2.2 billion at September 30, 2018 , and December 31, 2017 , respectively, for certain delinquent loans that are eligible for repurchase from GNMA loan securitizations. The recorded carrying value represents the amount that would be payable if the Company was to exercise the repurchase option. The carrying amounts are excluded from the table because the loans eligible for repurchase do not represent interests in the VIEs. (3) Represents senior loans to trusts that are collateralized by asset-backed securities. The trusts invested in senior tranches from a diversified pool of U.S. asset securitizations, of which all were current and 100% were rated as investment grade by the primary rating agencies at December 31, 2017 . These senior loans were accounted for at amortized cost and were subject to the Company’s allowance and credit charge-off policies. The securitization was terminated in first quarter 2018. (4) Includes structured financing and credit-linked note structures. Also contains investments in auction rate securities (ARS) issued by VIEs that we do not sponsor and, accordingly, are unable to obtain the total assets of the entity. In Table 9.2 , “Total VIE assets” represents the remaining principal balance of assets held by unconsolidated VIEs using the most current information available. For VIEs that obtain exposure to assets synthetically through derivative instruments, the remaining notional amount of the derivative is included in the asset balance. “Carrying value” is the amount in our consolidated balance sheet related to our involvement with the unconsolidated VIEs. “Maximum exposure to loss” from our involvement with off-balance sheet entities, which is a required disclosure under GAAP, is determined as the carrying value of our involvement with off-balance sheet (unconsolidated) VIEs plus the remaining undrawn liquidity and lending commitments, the notional amount of net written derivative contracts, and generally the notional amount of, or stressed loss estimate for, other commitments and guarantees. It represents estimated loss that would be incurred under severe, hypothetical circumstances, for which we believe the possibility is extremely remote, such as where the value of our interests and any associated collateral declines to zero, without any consideration of recovery or offset from any economic hedges. Accordingly, this required disclosure is not an indication of expected loss. For complete descriptions of our types of transactions with unconsolidated VIEs with which we have a significant continuing involvement, but we are not the primary beneficiary, see Note 8 (Securitizations and Variable Interest Entities) to Financial Statements in our 2017 Form 10-K. INVESTMENT FUNDS Subsequent to adopting ASU 2015-02 ( Amendments to the Consolidation Analysis ) in first quarter 2016, we do not consolidate these investment funds because we do not hold variable interests that are considered significant to the funds. We voluntarily waived a portion of our management fees for certain money market funds that are exempt from the consolidation analysis to ensure the funds maintained a minimum level of daily net investment income. The amount of fees waived in the third quarter and first nine months of 2018 was $10 million and $35 million , respectively, compared with $12 million and $39 million , respectively, in the same periods of 2017 . OTHER TRANSACTIONS WITH VIEs Other VIEs include certain entities that issue auction rate securities (ARS) which are debt instruments with long-term maturities, that re-price more frequently, and preferred equities with no maturity. At September 30, 2018 , we held $43 million of ARS issued by VIEs compared with $400 million at December 31, 2017 . We acquired the ARS pursuant to agreements entered into in 2008 and 2009. We do not consolidate the VIEs that issued the ARS because we do not have power over the activities of the VIEs. TRUST PREFERRED SECURITIES VIEs that we wholly own issue debt securities or preferred equity to third party investors. All of the proceeds of the issuance are invested in debt securities or preferred equity that we issue to the VIEs. The VIEs’ operations and cash flows relate only to the issuance, administration and repayment of the securities held by third parties. We do not consolidate these VIEs because the sole assets of the VIEs are receivables from us, even though we own all of the voting equity shares of the VIEs, have fully guaranteed the obligations of the VIEs and may have the right to redeem the third party securities under certain circumstances. In our consolidated balance sheet at September 30, 2018 , and December 31, 2017 , we reported the debt securities issued to the VIEs as long-term junior subordinated debt with a carrying value of $1.9 billion and $2.0 billion , respectively, and the preferred equity securities issued to the VIEs as preferred stock with a carrying value of $2.5 billion at both dates. These amounts are in addition to the involvements in these VIEs included in the preceding table. Loan Sales and Securitization Activity We periodically transfer consumer and CRE loans and other types of financial assets in securitization and whole loan sale transactions. We typically retain the servicing rights from these sales and may continue to hold other beneficial interests in the transferred financial assets. We may also provide liquidity to investors in the beneficial interests and credit enhancements in the form of standby letters of credit. Through these transfers we may be exposed to liability under limited amounts of recourse as well as standard representations and warranties we make to purchasers and issuers. Table 9.3 presents the cash flows for our transfers accounted for as sales. Table 9.3: Cash Flows From Sales and Securitization Activity 2018 2017 (in millions) Mortgage loans Other financial assets Mortgage loans Other financial assets Quarter ended September 30, Proceeds from securitizations and whole loan sales $ 53,792 — 61,756 — Fees from servicing rights retained 812 — 826 — Cash flows from other interests held (1) 221 — 408 — Repurchases of assets/loss reimbursements (2): Non-agency securitizations and whole loan transactions 2 — 5 — Agency securitizations (3) 17 — 20 — Servicing advances, net of repayments (24 ) — (90 ) — Nine months ended September 30, Proceeds from securitizations and whole loan sales $ 156,369 — 172,837 25 Fees from servicing rights retained 2,487 — 2,520 — Cash flows from other interests held (1) 574 1 1,883 — Repurchases of assets/loss reimbursements (2): Non-agency securitizations and whole loan transactions 4 — 12 — Agency securitizations (3) 69 — 66 — Servicing advances, net of repayments (67 ) — (252 ) — (1) Cash flows from other interests held include principal and interest payments received on retained bonds and excess cash flows received on interest-only strips. (2) Consists of cash paid to repurchase loans from investors and cash paid to investors to reimburse them for losses on individual loans that are already liquidated. (3) Represent loans repurchased from GNMA, FNMA, and FHLMC under representation and warranty provisions included in our loan sales contracts. Third quarter and first nine months of 2018 exclude $1.5 billion and $ 6.2 billion , respectively, in delinquent insured/guaranteed loans that we service and have exercised our option to purchase out of GNMA pools, compared with $2.1 billion and $6.0 billion , respectively, in the same periods of 2017 . These loans are predominantly insured by the FHA or guaranteed by the VA. In the third quarter and first nine months of 2018 , we recognized net gains of $690 million and $1.9 billion , respectively, from transfers accounted for as sales of financial assets, compared with $91 million and $616 million , respectively, in the same periods of 2017 . These net gains predominantly relate to whole loan sales, commercial mortgage securitizations, and residential mortgage securitizations where the loans were not already carried at fair value. Sales with continuing involvement during the third quarter and first nine months of 2018 and 2017 l argely related to securitizations of residential mortgages that are sold to the government-sponsored entities (GSEs), including FNMA, FHLMC and GNMA (conforming residential mortgage securitizations). During the third quarter and first nine months of 2018 , we transferred $49.6 billion and $144.6 billion , respectively, in fair value of residential mortgages to unconsolidated VIEs and third-party investors and recorded the transfers as sales, compared with $57.8 billion and $163.0 billion , respectively, in the same periods of 2017 . Substantially all of these transfers did not result in a gain or loss because the loans were already carried at fair value. In connection with all of these transfers, in the first nine months of 2018 , we recorded a $1.5 billion servicing asset, measured at fair value using a Level 3 measurement technique, securities of $2.6 billion , classified as Level 2, and a $12 million liability for repurchase losses which reflects management’s estimate of probable losses related to various representations and warranties for the loans transferred, initially measured at fair value. In the first nine months of 2017 , we recorded a $1.5 billion servicing asset, securities of $2.2 billion , and a $20 million liability. Table 9.4 presents the key weighted-average assumptions we used to measure residential mortgage servicing rights at the date of securitization. Table 9.4: Residential Mortgage Servicing Rights Residential mortgage servicing rights 2018 2017 Quarter ended September 30, Prepayment speed (1) 11.2 % 12.1 Discount rate 7.6 6.9 Cost to service ($ per loan) (2) $ 128 122 Nine months ended September 30, Prepayment speed (1) 10.5 % 11.7 Discount rate 7.4 6.9 Cost to service ($ per loan) (2) $ 130 135 (1) The prepayment speed assumption for residential mortgage servicing rights includes a blend of prepayment speeds and default rates. Prepayment speed assumptions are influenced by mortgage interest rate inputs as well as our estimation of drivers of borrower behavior. (2) Includes costs to service and unreimbursed foreclosure costs, which can vary period to period depending on the mix of modified government-guaranteed loans sold to GNMA. During the third quarter and first nine months of 2018 , we transferred $4.1 billion and $11.6 billion , respectively, in carrying value of commercial mortgages to unconsolidated VIEs and third-party investors and recorded the transfers as sales, compared with $4.6 billion and $11.2 billion , respectively, in the same periods of 2017 . These transfers resulted in gains of $67 million and $196 million in the third quarter and first nine months of 2018 , respectively, because the loans were carried at lower of cost or fair value (LOCOM), compared with gains of $89 million and $265 million in the same periods of 2017 . In connection with these transfers, in the first nine months of 2018 , we recorded a servicing asset of $106 million , initially measured at fair value using a Level 3 measurement technique, and securities of $47 million , classified as Level 2. In the first nine months of 2017 , we recorded a servicing asset of $123 million and securities of $65 million . Retained Interests from Unconsolidated VIEs Table 9.5 provides key economic assumptions and the sensitivity of the current fair value of residential mortgage servicing rights and other interests held to immediate adverse changes in those assumptions. “Other interests held” relate to residential and commercial mortgage loan securitizations. Residential mortgage-backed securities retained in securitizations issued through GSEs, such as FNMA, FHLMC and GNMA, are excluded from the table because these securities have a remote risk of credit loss due to the GSE guarantee. These securities also have economic characteristics similar to GSE mortgage-backed securities that we purchase, which are not included in the table. Subordinated interests include only those bonds whose credit rating was below AAA by a major rating agency at issuance. Senior interests include only those bonds whose credit rating was AAA by a major rating agency at issuance. The information presented excludes trading positions held in inventory. Table 9.5: Retained Interests from Unconsolidated VIEs Other interests held Residential mortgage servicing rights (1) Interest-only strips Commercial (2) ($ in millions, except cost to service amounts) Subordinated bonds Senior bonds Fair value of interests held at September 30, 2018 $ 15,980 17 677 270 Expected weighted-average life (in years) 6.9 3.8 6.8 5.3 Key economic assumptions: Prepayment speed assumption (3) 9.0 % 16.8 Decrease in fair value from: 10% adverse change $ 572 1 25% adverse change 1,361 1 Discount rate assumption 7.2 % 14.7 4.1 3.8 Decrease in fair value from: 100 basis point increase $ 727 — 37 12 200 basis point increase 1,386 1 71 23 Cost to service assumption ($ per loan) 129 Decrease in fair value from: 10% adverse change 442 25% adverse change 1,100 Credit loss assumption 4.9 % — Decrease in fair value from: 10% higher losses $ 2 — 25% higher losses 5 — Fair value of interests held at December 31, 2017 $ 13,625 19 596 468 Expected weighted-average life (in years) 6.2 3.3 6.7 5.2 Key economic assumptions: Prepayment speed assumption (3) 10.5 % 20.0 Decrease in fair value from: 10% adverse change $ 565 1 25% adverse change 1,337 2 Discount rate assumption 6.9 % 14.8 4.1 3.1 Decrease in fair value from: 100 basis point increase $ 652 — 32 20 200 basis point increase 1,246 1 61 39 Cost to service assumption ($ per loan) 143 Decrease in fair value from: 10% adverse change 467 25% adverse change 1,169 Credit loss assumption 1.8 % — Decrease in fair value from: 10% higher losses $ — — 25% higher losses — — (1) See narrative following this table for a discussion of commercial mortgage servicing rights. (2) Prepayment speed assumptions do not significantly impact the value of commercial mortgage securitization bonds as the underlying commercial mortgage loans experience significantly lower prepayments due to certain contractual restrictions, impacting the borrower’s ability to prepay the mortgage. (3) The prepayment speed assumption for residential mortgage servicing rights includes a blend of prepayment speeds and default rates. Prepayment speed assumptions are influenced by mortgage interest rate inputs as well as our estimation of drivers of borrower behavior. In addition to residential mortgage servicing rights (MSRs) included in the previous table, we have a small portfolio of commercial MSRs with a fair value of $2.4 billion and $2.0 billion at September 30, 2018 , and December 31, 2017 , respectively. The nature of our commercial MSRs, which are carried at LOCOM, is different from our residential MSRs. Prepayment activity on serviced loans does not significantly impact the value of commercial MSRs because, unlike residential mortgages, commercial mortgages experience significantly lower prepayments due to certain contractual restrictions, impacting the borrower’s ability to prepay the mortgage. Additionally, for our commercial MSR portfolio, we are typically master/primary servicer, but not the special servicer, who is separately responsible for the servicing and workout of delinquent and foreclosed loans. It is the special servicer, similar to our role as servicer of residential mortgage loans, who is affected by higher servicing and foreclosure costs due to an increase in delinquent and foreclosed loans. Accordingly, prepayment speeds and costs to service are not key assumptions for commercial MSRs as they do not significantly impact the valuation. The primary economic driver impacting the fair value of our commercial MSRs is forward interest rates, which are derived from market observable yield curves used to price capital markets instruments. Market interest rates significantly affect interest earned on custodial deposit balances. The sensitivity of the current fair value to an immediate adverse 25% change in the assumption about interest earned on deposit balances at September 30, 2018 , and December 31, 2017 , results in a decrease in fair value of $347 million and $278 million , respectively. See Note 10 (Mortgage Banking Activities) for further information on our commercial MSRs. The sensitivities in the preceding paragraph and table are hypothetical and caution should be exercised when relying on this data. Changes in value based on variations in assumptions generally cannot be extrapolated because the relationship of the change in the assumption to the change in value may not be linear. Also, the effect of a variation in a particular assumption on the value of the other interests held is calculated independently without changing any other assumptions. In reality, changes in one factor may result in changes in others (for example, changes in prepayment speed estimates could result in changes in the credit losses), which might magnify or counteract the sensitivities. Off-Balance Sheet Loans Table 9.6 presents information about the principal balances of off-balance sheet loans that were sold or securitized, including residential mortgage loans sold to FNMA, FHLMC, GNMA and other investors, for which we have some form of continuing involvement (including servicer). Delinquent loans include loans 90 days or more past due and loans in bankruptcy, regardless of delinquency status. For loans sold or securitized where servicing is our only form of continuing involvement, we would only experience a loss if we were required to repurchase a delinquent loan or foreclosed asset due to a breach in representations and warranties associated with our loan sale or servicing contracts. Table 9.6: Off-Balance Sheet Loans Sold or Securitized Net charge-offs Total loans Delinquent loans and foreclosed assets (1) Nine months ended September 30, (in millions) Sep 30, 2018 Dec 31, 2017 Sep 30, 2018 Dec 31, 2017 2018 2017 Commercial: Real estate mortgage $ 102,384 100,875 1,997 2,839 244 718 Total commercial 102,384 100,875 1,997 2,839 244 718 Consumer: Real estate 1-4 family first mortgage 1,110,568 1,126,208 9,863 13,393 368 546 Total consumer 1,110,568 1,126,208 9,863 13,393 368 546 Total off-balance sheet sold or securitized loans (2) $ 1,212,952 1,227,083 11,860 16,232 612 1,264 (1) Includes $1.3 billion and $1.2 billion of commercial foreclosed assets and $656 million and $879 million of consumer foreclosed assets at September 30, 2018 , and December 31, 2017 , respectively. (2) At September 30, 2018 , and December 31, 2017 , the table includes total loans of $1.1 trillion at both dates, delinquent loans of $6.6 billion and $9.1 billion , and foreclosed assets of $455 million and $619 million , respectively, for FNMA, FHLMC and GNMA. Net charge-offs exclude loans sold to FNMA, FHLMC and GNMA as we do not service or manage the underlying real estate upon foreclosure and, as such, do not have access to net charge-off information. Transactions with Consolidated VIEs and Secured Borrowings Table 9.7 presents a summary of financial assets and liabilities for asset transfers accounted for as secured borrowings and involvements with consolidated VIEs. Carrying values of “Assets” are presented using GAAP measurement methods, which may include fair value, credit impairment or other adjustments, and therefore in some instances will differ from “Total VIE assets.” For VIEs that obtain exposure synthetically through derivative instruments, the remaining notional amount of the derivative is included in “Total VIE assets.” On the consolidated balance sheet, we separately disclose the consolidated assets of certain VIEs that can only be used to settle the liabilities of those VIEs. Table 9.7: Transactions with Consolidated VIEs and Secured Borrowings Carrying value (in millions) Total VIE assets Assets Liabilities Noncontrolling interests Net assets September 30, 2018 Secured borrowings: Municipal tender option bond securitizations $ 647 545 (521 ) — 24 Residential mortgage securitizations 99 96 (97 ) — (1 ) Total secured borrowings 746 641 (618 ) — 23 Consolidated VIEs: Commercial and industrial loans and leases 7,571 7,546 (447 ) (13 ) 7,086 Nonconforming residential mortgage loan securitizations 2,127 1,873 (576 ) — 1,297 Commercial real estate loans 3,648 3,648 — — 3,648 Structured asset finance — — — — — Investment funds 61 61 (1 ) (18 ) 42 Other 12 12 (1 ) (6 ) 5 Total consolidated VIEs 13,419 13,140 (1,025 ) (37 ) 12,078 Total secured borrowings and consolidated VIEs $ 14,165 13,781 (1,643 ) (37 ) 12,101 December 31, 2017 Secured borrowings: Municipal tender option bond securitizations $ 658 565 (532 ) — 33 Residential mortgage securitizations 113 110 (111 ) — (1 ) Total secured borrowings 771 675 (643 ) — 32 Consolidated VIEs: Commercial and industrial loans and leases 9,116 8,626 (915 ) (29 ) 7,682 Nonconforming residential mortgage loan securitizations 2,515 2,212 (694 ) — 1,518 Commercial real estate loans 2,378 2,378 — — 2,378 Structured asset finance 10 6 (4 ) — 2 Investment funds 305 305 (2 ) (230 ) 73 Other 100 90 (1 ) (24 ) 65 Total consolidated VIEs 14,424 13,617 (1,616 ) (283 ) 11,718 Total secured borrowings and consolidated VIEs $ 15,195 14,292 (2,259 ) (283 ) 11,750 INVESTMENT FUNDS Subsequent to adopting ASU 2015-02 – Amendments to the Consolidation Analysis in first quarter 2016, we consolidate certain investment funds because we have both the power to manage fund assets and hold variable interests that are considered significant. For complete descriptions of our accounting for transfers accounted for as secured borrowings and involvements with consolidated VIEs, see Note 8 (Securitizations and Variable Interest Entities) to Financial Statements in our 2017 Form 10-K.

Mortgage Banking Activities

Mortgage Banking Activities	9 Months Ended
	Sep. 30, 2018
Mortgage Banking Activities [Abstract]
Mortgage Banking Activities	Note 10: Mortgage Banking Activities Mortgage banking activities, included in the Community Banking and Wholesale Banking operating segments, consist of residential and commercial mortgage originations, sale activity and servicing. We apply the amortization method to commercial MSRs and apply the fair value method to residential MSRs. Table 10.1 presents the changes in MSRs measured using the fair value method. Table 10.1: Analysis of Changes in Fair Value MSRs Quarter ended Sep 30, Nine months ended Sep 30, (in millions) 2018 2017 2018 2017 Fair value, beginning of period $ 15,411 12,789 13,625 12,959 Purchases — 541 — 541 Servicing from securitizations or asset transfers (1) 502 605 1,561 1,624 Sales and other (2) (2 ) 64 (7 ) 9 Net additions 500 1,210 1,554 2,174 Changes in fair value: Due to changes in valuation model inputs or assumptions: Mortgage interest rates (3) 582 (171 ) 2,211 (324 ) Servicing and foreclosure costs (4) (9 ) 60 55 73 Discount rates (5) (9 ) — (9 ) — Prepayment estimates and other (6) (33 ) (31 ) (51 ) (77 ) Net changes in valuation model inputs or assumptions 531 (142 ) 2,206 (328 ) Changes due to collection/realization of expected cash flows over time (462 ) (519 ) (1,405 ) (1,467 ) Total changes in fair value 69 (661 ) 801 (1,795 ) Fair value, end of period $ 15,980 13,338 15,980 13,338 (1) Includes impacts associated with exercising our right to repurchase delinquent loans from GNMA loan securitization pools. (2) Includes sales and transfers of MSRs, which can result in an increase of total reported MSRs if the sales or transfers are related to nonperforming loan portfolios or portfolios with servicing liabilities. (3) Includes prepayment speed changes as well as other valuation changes due to changes in mortgage interest rates (such as changes in estimated interest earned on custodial deposit balances). (4) Includes costs to service and unreimbursed foreclosure costs. (5) Reflects discount rate assumption change, excluding portion attributable to changes in mortgage interest rates. (6) Represents changes driven by other valuation model inputs or assumptions including prepayment speed estimation changes and other assumption updates. Prepayment speed estimation changes are influenced by observed changes in borrower behavior and other external factors that occur independent of interest rate changes. Table 10.2 presents the changes in amortized MSRs. Table 10.2: Analysis of Changes in Amortized MSRs Quarter ended Sep 30, Nine months ended Sep 30, (in millions) 2018 2017 2018 2017 Balance, beginning of period $ 1,407 1,399 1,424 1,406 Purchases 42 31 82 75 Servicing from securitizations or asset transfers 33 41 106 123 Amortization (68 ) (65 ) (198 ) (198 ) Balance, end of period (1) $ 1,414 1,406 1,414 1,406 Fair value of amortized MSRs: Beginning of period $ 2,309 1,989 2,025 1,956 End of period 2,389 1,990 2,389 1,990 (1) Commercial amortized MSRs are evaluated for impairment purposes by the following risk strata: agency (GSEs) for multi-family properties and non-agency. There was no valuation allowance recorded for the periods presented on the commercial amortized MSRs. We present the components of our managed servicing portfolio in Table 10.3 at unpaid principal balance for loans serviced and subserviced for others and at book value for owned loans serviced. Table 10.3: Managed Servicing Portfolio (in billions) Sep 30, 2018 Dec 31, 2017 Residential mortgage servicing: Serviced for others $ 1,184 1,209 Owned loans serviced 337 342 Subserviced for others 5 3 Total residential servicing 1,526 1,554 Commercial mortgage servicing: Serviced for others 529 495 Owned loans serviced 121 127 Subserviced for others 9 9 Total commercial servicing 659 631 Total managed servicing portfolio $ 2,185 2,185 Total serviced for others $ 1,713 1,704 Ratio of MSRs to related loans serviced for others 1.02 % 0.88 Table 10.4 presents the components of mortgage banking noninterest income. Table 10.4: Mortgage Banking Noninterest Income Quarter ended Sep 30, Nine months ended Sep 30, (in millions) 2018 2017 2018 2017 Servicing income, net: Servicing fees: Contractually specified servicing fees $ 880 889 2,697 2,696 Late charges 40 41 126 133 Ancillary fees 49 51 136 160 Unreimbursed direct servicing costs (1) (79 ) (186 ) (258 ) (430 ) Net servicing fees 890 795 2,701 2,559 Changes in fair value of MSRs carried at fair value: Due to changes in valuation model inputs or assumptions (2) (A) 531 (142 ) 2,206 (328 ) Changes due to collection/realization of expected cash flows over time (462 ) (519 ) (1,405 ) (1,467 ) Total changes in fair value of MSRs carried at fair value 69 (661 ) 801 (1,795 ) Amortization (68 ) (65 ) (198 ) (198 ) Net derivative gains (losses) from economic hedges (3) (B) (501 ) 240 (2,040 ) 599 Total servicing income, net 390 309 1,264 1,165 Net gains on mortgage loan origination/sales activities 456 737 1,286 2,257 Total mortgage banking noninterest income $ 846 1,046 2,550 3,422 Market-related valuation changes to MSRs, net of hedge results (2)(3) (A)+(B) $ 30 98 166 271 (1) Includes costs associated with foreclosures, unreimbursed interest advances to investors, and other interest costs. (2) Refer to the analysis of changes in fair value MSRs presented in Table 10.1 in this Note for more detail. (3) Represents results from economic hedges used to hedge the risk of changes in fair value of MSRs. See Note 14 (Derivatives Not Designated as Hedging Instruments) for additional discussion and detail. Table 10.5 summarizes the changes in our liability for mortgage loan repurchase losses. This liability is in “Accrued expenses and other liabilities” in our consolidated balance sheet and adjustments to the repurchase liability are recorded in net gains on mortgage loan origination/sales activities in “Mortgage banking” in our consolidated income statement. Because of the uncertainty in the various estimates underlying the mortgage repurchase liability, there is a range of losses in excess of the recorded mortgage repurchase liability that is reasonably possible. The estimate of the range of possible loss for representations and warranties does not represent a probable loss, and is based on currently available information, significant judgment, and a number of assumptions that are subject to change. The high end of this range of reasonably possible losses exceeded our recorded liability by $201 million at September 30, 2018 , and was determined based upon modifying the assumptions (particularly to assume significant changes in investor repurchase demand practices) used in our best estimate of probable loss to reflect what we believe to be the high end of reasonably possible adverse assumptions. Table 10.5: Analysis of Changes in Liability for Mortgage Loan Repurchase Losses Quarter ended Sep 30, Nine months ended Sep 30, (in millions) 2018 2017 2018 2017 Balance, beginning of period $ 179 178 181 229 Assumed with MSR purchases (1) — 10 — 10 Provision for repurchase losses: Loan sales 5 6 12 20 Change in estimate (2) (4 ) (12 ) (5 ) (65 ) Net additions (reductions) to provision 1 (6 ) 7 (45 ) Losses (2 ) (3 ) (10 ) (15 ) Balance, end of period $ 178 179 178 179 (1) Represents repurchase liability associated with portfolio of loans underlying mortgage servicing rights acquired during the period. (2) Results from changes in investor demand and mortgage insurer practices, credit deterioration and changes in the financial stability of correspondent lenders.

Intangible Assets

Intangible Assets	9 Months Ended
	Sep. 30, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible Assets	Note 11: Intangible Assets Table 11.1 presents the gross carrying value of intangible assets and accumulated amortization. Table 11.1: Intangible Assets September 30, 2018 December 31, 2017 (in millions) Gross carrying value Accumulated amortization Net carrying value Gross carrying value Accumulated amortization Net carrying value Amortized intangible assets (1): MSRs (2) $ 4,064 (2,650 ) 1,414 3,876 (2,452 ) 1,424 Core deposit intangibles 12,834 (12,642 ) 192 12,834 (12,065 ) 769 Customer relationship and other intangibles 3,997 (3,377 ) 620 3,994 (3,153 ) 841 Total amortized intangible assets $ 20,895 (18,669 ) 2,226 20,704 (17,670 ) 3,034 Unamortized intangible assets: MSRs (carried at fair value) (2) $ 15,980 13,625 Goodwill 26,425 26,587 Trademark 14 14 (1) Excludes fully amortized intangible assets. (2) See Note 10 (Mortgage Banking Activities) for additional information on MSRs. Table 11.2 provides the current year and estimated future amortization expense for amortized intangible assets. We based our projections of amortization expense shown below on existing asset balances at September 30, 2018 . Future amortization expense may vary from these projections. Table 11.2: Amortization Expense for Intangible Assets (in millions) Amortized MSRs Core deposit intangibles Customer relationship and other intangibles (1) Total Nine months ended September 30, 2018 (actual) $ 198 577 224 999 Estimate for the remainder of 2018 $ 67 192 75 334 Estimate for year ended December 31, 2019 247 — 117 364 2020 220 — 97 317 2021 189 — 83 272 2022 168 — 69 237 2023 141 — 59 200 (1) The nine months ended September 30, 2018 balance includes $7 million for lease intangible amortization. Table 11.3 shows the allocation of goodwill to our reportable operating segments. Table 11.3: Goodwill (in millions) Community Banking Wholesale Banking Wealth and Investment Management Consolidated Company December 31, 2016 $ 16,849 8,585 1,259 26,693 Reclassification of goodwill held for sale to other assets — (116 ) — (116 ) Reduction in goodwill related to divested businesses and other — (20 ) — (20 ) Goodwill from business combinations — — 24 24 September 30, 2017 (1) $ 16,849 8,449 1,283 26,581 December 31, 2017 $ 16,849 8,455 1,283 26,587 Reclassification of goodwill held for sale to other assets (155 ) — — (155 ) Reduction in goodwill related to divested businesses and other (6 ) (1 ) — (7 ) September 30, 2018 (1) $ 16,688 8,454 1,283 26,425 (1) At September 30, 2017, other assets included Goodwill classified as held-for-sale of $116 million related to the sales agreement for Wells Fargo Insurance Services USA (and related businesses) and Wells Fargo Shareowner Services. At September 30, 2018, other assets included Goodwill classified as held-for-sale of $12 million related to the branch divestitures announced in June 2018. We assess goodwill for impairment at a reporting unit level, which is one level below the operating segments. See Note 21 (Operating Segments) for further information on management reporting.

Guarantees, Pledged Assets and

Guarantees, Pledged Assets and Collateral	9 Months Ended
	Sep. 30, 2018
Guarantees [Abstract]
Guarantees, Pledged Assets and Collateral	Note 12: Guarantees, Pledged Assets and Collateral, and Other Commitments Guarantees are contracts that contingently require us to make payments to a guaranteed party based on an event or a change in an underlying asset, liability, rate or index. Guarantees are generally in the form of standby letters of credit, securities lending and other indemnifications, written put options, recourse obligations, and other types of arrangements. For complete descriptions of our guarantees, see Note 14 (Guarantees, Pledged Assets and Collateral, and Other Commitments) to Financial Statements in our 2017 Form 10-K. Table 12.1 shows carrying value, maximum exposure to loss on our guarantees and the related non-investment grade amounts. Table 12.1: Guarantees – Carrying Value and Maximum Exposure to Loss Maximum exposure to loss (in millions) Carrying value of obligation (asset) Expires in one year or less Expires after one year through three years Expires after three years through five years Expires after five years Total Non- investment grade September 30, 2018 Standby letters of credit (1) $ 36 14,051 8,024 3,051 476 25,602 8,025 Securities lending and other indemnifications (2) — — — — 1,454 1,454 — Written put options (3) (486 ) 14,420 11,122 2,876 702 29,120 16,703 Loans and MLHFS sold with recourse (4) 50 148 654 1,178 9,540 11,520 8,587 Factoring guarantees (5) — 978 — — — 978 891 Other guarantees 1 3 — 3 2,781 2,787 4 Total guarantees $ (399 ) 29,600 19,800 7,108 14,953 71,461 34,210 December 31, 2017 Standby letters of credit (1) $ 39 15,357 7,908 3,068 645 26,978 8,773 Securities lending and other indemnifications (2) — — — 2 809 811 2 Written put options (3) (455 ) 14,758 12,706 3,890 1,038 32,392 19,087 Loans and MLHFS sold with recourse (4) 51 165 533 934 9,385 11,017 8,155 Factoring guarantees (5) — 747 — — — 747 668 Other guarantees 1 7 — 2 4,175 4,184 7 Total guarantees $ (364 ) 31,034 21,147 7,896 16,052 76,129 36,692 (1) Total maximum exposure to loss includes direct pay letters of credit (DPLCs) of $7.2 billion and $8.1 billion at September 30, 2018 , and December 31, 2017 , respectively. We issue DPLCs to provide credit enhancements for certain bond issuances. Beneficiaries (bond trustees) may draw upon these instruments to make scheduled principal and interest payments, redeem all outstanding bonds because a default event has occurred, or for other reasons as permitted by the agreement. We also originate multipurpose lending commitments under which borrowers have the option to draw on the facility in one of several forms, including as a standby letter of credit. Total maximum exposure to loss includes the portion of these facilities for which we have issued standby letters of credit under the commitments. (2) Includes indemnifications provided to certain third-party clearing agents. Outstanding customer obligations under these arrangements were $115 million and $92 million with related collateral of $1.3 billion and $717 million at September 30, 2018 , and December 31, 2017 , respectively. Estimated maximum exposure to loss was $1.5 billion at September 30, 2018 and $809 million at December 31, 2017 . (3) Written put options, which are in the form of derivatives, are also included in the derivative disclosures in Note 14 (Derivatives). Carrying value net asset position is a result of certain deferred premium option trades. (4) Represent recourse provided, predominantly to the GSEs, on loans sold under various programs and arrangements. Under these arrangements, we repurchased $1 million and $2 million of loans associated with these agreements in both the third quarter and first nine months of 2018 , and $1 million and $3 million in the same periods of 2017 , respectively. (5) Consists of guarantees made under certain factoring arrangements to purchase trade receivables from third parties, generally upon their request, if receivable debtors default on their payment obligations. “Maximum exposure to loss” and “Non-investment grade” are required disclosures under GAAP. Non-investment grade represents those guarantees on which we have a higher risk of being required to perform under the terms of the guarantee. If the underlying assets under the guarantee are non-investment grade (that is, an external rating that is below investment grade or an internal credit default grade that is equivalent to a below investment grade external rating), we consider the risk of performance to be high. Internal credit default grades are determined based upon the same credit policies that we use to evaluate the risk of payment or performance when making loans and other extensions of credit. Credit quality indicators we usually consider in evaluating risk of payments or performance are described in Note 6 (Loans and Allowance for Credit Losses). Maximum exposure to loss represents the estimated loss that would be incurred under an assumed hypothetical circumstance, despite what we believe is a remote possibility, where the value of our interests and any associated collateral declines to zero. Maximum exposure to loss estimates in Table 12.1 do not reflect economic hedges or collateral we could use to offset or recover losses we may incur under our guarantee agreements. Accordingly, this required disclosure is not an indication of expected loss. We believe the carrying value, which is either fair value for derivative-related products or the allowance for lending-related commitments, is more representative of our exposure to loss than maximum exposure to loss. Pledged Assets As part of our liquidity management strategy, we pledge various assets to secure trust and public deposits, borrowings and letters of credit from the FHLB and FRB, securities sold under agreements to repurchase (repurchase agreements), securities lending arrangements, and for other purposes as required or permitted by law or insurance statutory requirements. The types of collateral we pledge include securities issued by federal agencies, GSEs, domestic and foreign companies and various commercial and consumer loans. Table 12.2 provides the total carrying amount of pledged assets by asset type and pledged off-balance sheet securities for securities financings. The table excludes pledged consolidated VIE assets of $13.1 billion and $13.6 billion at September 30, 2018 , and December 31, 2017 , respectively, which can only be used to settle the liabilities of those entities. The table also excludes $641 million and $675 million in assets pledged in transactions with VIE's accounted for as secured borrowings at September 30, 2018 , and December 31, 2017 , respectively. See Note 9 (Securitizations and Variable Interest Entities) for additional information on consolidated VIE assets and secured borrowings. Table 12.2: Pledged Assets (in millions) Sep 30, Dec 31, Held for trading: Debt securities $ 94,862 96,993 Equity securities 10,996 12,161 Total pledged assets held for trading (1) 105,858 109,154 Not held for trading: Debt securities and other (2) 56,327 73,592 Mortgage loans held for sale and loans (3) 451,031 469,554 Total pledged assets not held for trading 507,358 543,146 Total pledged assets $ 613,216 652,300 (1) Consists of pledged assets held for trading of $47.2 billion and $41.9 billion at September 30, 2018 , and December 31, 2017 , respectively and off-balance sheet securities of $58.6 billion and $67.3 billion as of the same dates, respectively, that are pledged as collateral for repurchase agreements and other securities financings. Total pledged assets held for trading includes $105.8 billion and $109.0 billion at September 30, 2018 , and December 31, 2017 , respectively that permit the secured parties to sell or repledge the collateral. (2) Includes carrying value of $4.3 billion and $5.0 billion (fair value of $4.1 billion and $ 5.0 billion ) in collateral for repurchase agreements at September 30, 2018 , and December 31, 2017 , respectively, which are pledged under agreements that do not permit the secured parties to sell or repledge the collateral. Also includes $50 million and $64 million in collateral pledged under repurchase agreements at September 30, 2018 , and December 31, 2017 , respectively, that permit the secured parties to sell or repledge the collateral. Substantially all other pledged securities are pursuant to agreements that do not permit the secured party to sell or repledge the collateral. (3) Includes mortgage loans held for sale of $1.4 billion and $2.6 billion at September 30, 2018 , and December 31, 2017 , respectively. Substantially all of the total mortgage loans held for sale and loans are pledged under agreements that do not permit the secured parties to sell or repledge the collateral. Amounts exclude $1.0 billion and $2.2 billion at September 30, 2018 , and December 31, 2017 , respectively, of pledged loans recorded on our balance sheet representing certain delinquent loans that are eligible for repurchase from GNMA loan securitizations. Securities Financing Activities We enter into resale and repurchase agreements and securities borrowing and lending agreements (collectively, “securities financing activities”) typically to finance trading positions (including securities and derivatives), acquire securities to cover short trading positions, accommodate customers’ financing needs, and settle other securities obligations. These activities are conducted through our broker-dealer subsidiaries and to a lesser extent through other bank entities. Most of our securities financing activities involve high quality, liquid securities such as U.S. Treasury securities and government agency securities, and to a lesser extent, less liquid securities, including equity securities, corporate bonds and asset-backed securities. We account for these transactions as collateralized financings in which we typically receive or pledge securities as collateral. We believe these financing transactions generally do not have material credit risk given the collateral provided and the related monitoring processes. OFFSETTING OF RESALE AND REPURCHASE AGREEMENTS AND SECURITIES BORROWING AND LENDING AGREEMENTS Table 12.3 presents resale and repurchase agreements subject to master repurchase agreements (MRA) and securities borrowing and lending agreements subject to master securities lending agreements (MSLA). We account for transactions subject to these agreements as collateralized financings, and those with a single counterparty are presented net on our balance sheet, provided certain criteria are met that permit balance sheet netting. Most transactions subject to these agreements do not meet those criteria and thus are not eligible for balance sheet netting. Collateral we pledged consists of non-cash instruments, such as securities or loans, and is not netted on the balance sheet against the related liability. Collateral we received includes securities or loans and is not recognized on our balance sheet. Collateral pledged or received may be increased or decreased over time to maintain certain contractual thresholds as the assets underlying each arrangement fluctuate in value. Generally, these agreements require collateral to exceed the asset or liability recognized on the balance sheet. The following table includes the amount of collateral pledged or received related to exposures subject to enforceable MRAs or MSLAs. While these agreements are typically over-collateralized, U.S. GAAP requires disclosure in this table to limit the reported amount of such collateral to the amount of the related recognized asset or liability for each counterparty. In addition to the amounts included in Table 12.3 , we also have balance sheet netting related to derivatives that is disclosed in Note 14 (Derivatives). Table 12.3: Offsetting – Resale and Repurchase Agreements (in millions) Sep 30, Dec 31, Assets: Resale and securities borrowing agreements Gross amounts recognized $ 114,914 121,135 Gross amounts offset in consolidated balance sheet (1) (14,371 ) (23,188 ) Net amounts in consolidated balance sheet (2) 100,543 97,947 Collateral not recognized in consolidated balance sheet (3) (99,699 ) (96,829 ) Net amount (4) $ 844 1,118 Liabilities: Repurchase and securities lending agreements Gross amounts recognized (5) $ 106,253 111,488 Gross amounts offset in consolidated balance sheet (1) (14,371 ) (23,188 ) Net amounts in consolidated balance sheet (6) 91,882 88,300 Collateral pledged but not netted in consolidated balance sheet (7) (91,580 ) (87,918 ) Net amount (8) $ 302 382 (1) Represents recognized amount of resale and repurchase agreements with counterparties subject to enforceable MRAs that have been offset in the consolidated balance sheet. (2) At September 30, 2018 , and December 31, 2017 , includes $83.4 billion and $78.9 billion , respectively, classified on our consolidated balance sheet in federal funds sold and securities purchased under resale agreements. Balance also includes securities purchased under long-term resale agreements (generally one year or more) classified in loans, which totaled $17.1 billion and $19.0 billion , at September 30, 2018 , and December 31, 2017 , respectively. (3) Represents the fair value of collateral we have received under enforceable MRAs or MSLAs, limited for table presentation purposes to the amount of the recognized asset due from each counterparty. At September 30, 2018 , and December 31, 2017 , we have received total collateral with a fair value of $124.1 billion and $130.8 billion , respectively, all of which, we have the right to sell or repledge. These amounts include securities we have sold or repledged to others with a fair value of $60.4 billion at September 30, 2018 , and $66.3 billion at December 31, 2017 . (4) Represents the amount of our exposure that is not collateralized and/or is not subject to an enforceable MRA or MSLA. (5) For additional information on underlying collateral and contractual maturities, see the “Repurchase and Securities Lending Agreements” section in this Note. (6) Amount is classified in short-term borrowings on our consolidated balance sheet. (7) Represents the fair value of collateral we have pledged, related to enforceable MRAs or MSLAs, limited for table presentation purposes to the amount of the recognized liability owed to each counterparty. At September 30, 2018 , and December 31, 2017 , we have pledged total collateral with a fair value of $108.7 billion and $113.6 billion , respectively, of which, the counterparty does not have the right to sell or repledge $4.3 billion as of September 30, 2018 and $5.2 billion as of December 31, 2017 . (8) Represents the amount of our obligation that is not covered by pledged collateral and/or is not subject to an enforceable MRA or MSLA. REPURCHASE AND SECURITIES LENDING AGREEMENTS Securities sold under repurchase agreements and securities lending arrangements are effectively short-term collateralized borrowings. In these transactions, we receive cash in exchange for transferring securities as collateral and recognize an obligation to reacquire the securities for cash at the transaction's maturity. These types of transactions create risks, including (1) the counterparty may fail to return the securities at maturity, (2) the fair value of the securities transferred may decline below the amount of our obligation to reacquire the securities, and therefore create an obligation for us to pledge additional amounts, and (3) the counterparty may accelerate the maturity on demand, requiring us to reacquire the security prior to contractual maturity. We attempt to mitigate these risks by the fact that most of our securities financing activities involve highly liquid securities, we underwrite and monitor the financial strength of our counterparties, we monitor the fair value of collateral pledged relative to contractually required repurchase amounts, and we monitor that our collateral is properly returned through the clearing and settlement process in advance of our cash repayment. Table 12.4 provides the underlying collateral types of our gross obligations under repurchase and securities lending agreements. Table 12.4: Underlying Collateral Types of Gross Obligations (in millions) Sep 30, Dec 31, Repurchase agreements: Securities of U.S. Treasury and federal agencies (1) $ 35,758 40,507 Securities of U.S. States and political subdivisions 68 92 Federal agency mortgage-backed securities (1) 45,153 45,336 Non-agency mortgage-backed securities 1,441 1,324 Corporate debt securities (1) 8,869 8,020 Asset-backed securities 2,128 2,034 Equity securities 793 838 Other (1) 1,424 1,602 Total repurchases 95,634 99,753 Securities lending: Securities of U.S. Treasury and federal agencies 192 186 Corporate debt securities 418 619 Equity securities (2) 9,947 10,930 Other 62 — Total securities lending 10,619 11,735 Total repurchases and securities lending $ 106,253 111,488 (1) Amounts for December 31, 2017 have been revised to conform with the current period classification of certain collateral. (2) Equity securities are generally exchange traded and either re-hypothecated under margin lending agreements or obtained through contemporaneous securities borrowing transactions with other counterparties. Table 12.5 provides the contractual maturities of our gross obligations under repurchase and securities lending agreements. Table 12.5: Contractual Maturities of Gross Obligations (in millions) Overnight/continuous Up to 30 days 30-90 days >90 days Total gross obligation September 30, 2018 Repurchase agreements $ 82,130 5,879 2,954 4,671 95,634 Securities lending 10,281 38 300 — 10,619 Total repurchases and securities lending (1) $ 92,411 5,917 3,254 4,671 106,253 December 31, 2017 Repurchase agreements $ 83,780 7,922 3,286 4,765 99,753 Securities lending 9,634 584 1,363 154 11,735 Total repurchases and securities lending (1) $ 93,414 8,506 4,649 4,919 111,488 (1) Securities lending is executed under agreements that allow either party to terminate the transaction without notice, while repurchase agreements have a term structure to them that technically matures at a point in time. The overnight/continuous repurchase agreements require election of both parties to roll the trade rather than the election to terminate the arrangement as in securities lending. OTHER COMMITMENTS To meet the financing needs of our customers, we may enter into commitments to purchase debt and equity securities to provide capital for their funding, liquidity or other future needs. As of September 30, 2018 , a nd December 31, 2017 , we had commitments to purchase debt securities of $1.4 billion and $194 million , respectively, and commitments to purchase equity securities of $2.4 billion and $2.2 billion , respectively. As part of maintaining our memberships in certain clearing organizations, we are required to stand ready to provide liquidity meant to sustain market clearing activity in the event unforeseen events occur or are deemed likely to occur. This includes commitments we have entered into to purchase securities under resale agreements from a central clearing organization that, at its option, require us to provide funding under such agreements. We do not have any outstanding amounts funded, and the amount of our unfunded contractual commitment was $5.1 billion and $2.8 billion as of September 30, 2018 , and December 31, 2017 , respectively. The Parent will fully and unconditionally guarantee securities that its 100% owned finance subsidiary, Wells Fargo Finance LLC, may issue.

Legal Actions

Legal Actions	9 Months Ended
	Sep. 30, 2018
Commitments and Contingencies Disclosure [Abstract]
Legal Actions	Note 13: Legal Actions Wells Fargo and certain of our subsidiaries are involved in a number of judicial, regulatory, arbitration, and other proceedings concerning matters arising from the conduct of our business activities, and many of those proceedings expose Wells Fargo to potential financial loss. These proceedings include actions brought against Wells Fargo and/or our subsidiaries with respect to corporate-related matters and transactions in which Wells Fargo and/or our subsidiaries were involved. In addition, Wells Fargo and our subsidiaries may be requested to provide information or otherwise cooperate with government authorities in the conduct of investigations of other persons or industry groups. Although there can be no assurance as to the ultimate outcome, Wells Fargo and/or our subsidiaries have generally denied, or believe we have a meritorious defense and will deny, liability in all significant legal actions pending against us, including the matters described below, and we intend to defend vigorously each case, other than matters we describe as having settled. We establish accruals for legal actions when potential losses associated with the actions become probable and the costs can be reasonably estimated. For such accruals, we record the amount we consider to be the best estimate within a range of potential losses that are both probable and estimable; however, if we cannot determine a best estimate, then we record the low end of the range of those potential losses. The actual costs of resolving legal actions may be substantially higher or lower than the amounts accrued for those actions. ATM ACCESS FEE LITIGATION In October 2011, plaintiffs filed a putative class action, Mackmin, et al. v. Visa, Inc. et al. , against Wells Fargo & Company, Wells Fargo Bank, N.A., Visa, MasterCard, and several other banks in the United States District Court for the District of Columbia. Plaintiffs allege that the Visa and MasterCard requirement that if an ATM operator charges an access fee on Visa and MasterCard transactions, then that fee cannot be greater than the access fee charged for transactions on other networks violates antitrust rules. Plaintiffs seek treble damages, restitution, injunctive relief, and attorneys’ fees where available under federal and state law. Two other antitrust cases that make similar allegations were filed in the same court, but these cases did not name Wells Fargo as a defendant. On February 13, 2013, the district court granted defendants’ motions to dismiss the three actions. Plaintiffs appealed the dismissals and, on August 4, 2015, the United States Court of Appeals for the District of Columbia Circuit vacated the district court’s decisions and remanded the three cases to the district court for further proceedings. On June 28, 2016, the United States Supreme Court granted defendants’ petitions for writ of certiorari to review the decisions of the United States Court of Appeals for the District of Columbia. On November 17, 2016, the United States Supreme Court dismissed the petitions as improvidently granted, and the three cases returned to the district court for further proceedings. AUTOMOBILE LENDING MATTERS On April 20, 2018, the Company entered into consent orders with the Office of the Comptroller of the Currency (OCC) and the Bureau of Consumer Financial Protection (BCFP) to resolve, among other things, investigations by the agencies into the Company's compliance risk management program and its past practices involving certain automobile collateral protection insurance (CPI) policies and, as discussed below, certain mortgage interest rate lock extensions. The consent orders require remediation to customers and the payment of a total of $1 billion in civil money penalties to the agencies. In July 2017, the Company announced a plan to remediate customers who may have been financially harmed due to issues related to automobile CPI policies purchased through a third-party vendor on their behalf. Multiple putative class action cases alleging, among other things, unfair and deceptive practices relating to these CPI policies, have been filed against the Company and consolidated into one multi-district litigation in the United States District Court for the Central District of California. A putative class of shareholders also filed a securities fraud class action against the Company and its executive officers alleging material misstatements and omissions of CPI-related information in the Company's public disclosures. Former team members have also alleged retaliation for raising concerns regarding automobile lending practices. In addition, the Company has identified certain issues related to the unused portion of guaranteed automobile protection (GAP) waiver or insurance agreements between the dealer and, by assignment, the lender, which will result in refunds to customers in certain states. Allegations related to the CPI and GAP programs are among the subjects of shareholder derivative lawsuits pending in federal and state court in California. The court dismissed the state court action in September 2018, but granted plaintiffs leave to file an amended complaint by November 23, 2018. These and other issues related to the origination, servicing, and/or collection of consumer automobile loans, including related insurance products, have also subjected the Company to formal or informal inquiries, investigations, or examinations from federal and state government agencies, including a multi-state attorneys general group that is conducting an investigation into CPI and GAP. The Company anticipates it may continue to identify and remediate issues related to historical practices concerning the origination, servicing, and/or collection of consumer automobile loans. CONSUMER DEPOSIT ACCOUNT RELATED REGULATORY INVESTIGATION The BCFP is conducting an investigation into whether customers were unduly harmed by the Company’s procedures regarding the freezing (and, in many cases, closing) of consumer deposit accounts after the Company detected suspected fraudulent activity (by third parties or account holders) that affected those accounts. A former team member has brought a state court action alleging retaliation for raising concerns about these procedures. FIDUCIARY AND CUSTODY ACCOUNT FEE CALCULATIONS Federal government agencies are conducting formal or informal inquiries, investigations, or examinations regarding fee calculations within certain fiduciary and custody accounts in the Company’s investment and fiduciary services business, which is part of the wealth management business within WIM. The Company has determined that there have been instances of incorrect fees being applied to certain assets and accounts, resulting in both overcharges and undercharges to customers. FOREIGN EXCHANGE BUSINESS Federal government agencies, including the United States Department of Justice, are investigating or examining certain activities in the Company’s foreign exchange business. The Company has accrued amounts to remediate customers that may have received pricing inconsistent with commitments made to those customers, and to rebate customers where historic pricing, while consistent with contracts entered into with those customers, does not conform to recently implemented standards and pricing. INADVERTENT CLIENT INFORMATION DISCLOSURE In July 2017, the Company inadvertently provided certain client information in response to a third-party subpoena issued in a civil litigation. The Company obtained permanent injunctions in New Jersey and New York state courts requiring the electronic data that contained the client information and all copies to be delivered to the New Jersey state court and the Company for safekeeping. The court has now returned the data to counsel for the Company. The Company has made voluntary self-disclosures to various state and federal regulatory agencies. Notifications have been sent to clients whose personal identifying data was contained in the inadvertent production. INTERCHANGE LITIGATION Plaintiffs representing a putative class of merchants have filed putative class actions, and individual merchants have filed individual actions, against Wells Fargo Bank, N.A., Wells Fargo & Company, Wachovia Bank, N.A. and Wachovia Corporation regarding the interchange fees associated with Visa and MasterCard payment card transactions. Visa, MasterCard, and several other banks and bank holding companies are also named as defendants in these actions. These actions have been consolidated in the United States District Court for the Eastern District of New York. The amended and consolidated complaint asserts claims against defendants based on alleged violations of federal and state antitrust laws and seeks damages, as well as injunctive relief. Plaintiff merchants allege that Visa, MasterCard, and payment card issuing banks unlawfully colluded to set interchange rates. Plaintiffs also allege that enforcement of certain Visa and MasterCard rules and alleged tying and bundling of services offered to merchants are anticompetitive. Wells Fargo and Wachovia, along with other defendants and entities, are parties to Loss and Judgment Sharing Agreements, which provide that they, along with other entities, will share, based on a formula, in any losses from the Interchange Litigation. On July 13, 2012, Visa, MasterCard, and the financial institution defendants, including Wells Fargo, signed a memorandum of understanding with plaintiff merchants to resolve the consolidated class action and reached a separate settlement in principle of the consolidated individual actions. The settlement payments to be made by all defendants in the consolidated class and individual actions totaled approximately $6.6 billion before reductions applicable to certain merchants opting out of the settlement. The class settlement also provided for the distribution to class merchants of 10 basis points of default interchange across all credit rate categories for a period of 8 consecutive months. The district court granted final approval of the settlement, which was appealed to the United States Court of Appeals for the Second Circuit by settlement objector merchants. Other merchants opted out of the settlement and are pursuing several individual actions. On June 30, 2016, the Second Circuit vacated the settlement agreement and reversed and remanded the consolidated action to the United States District Court for the Eastern District of New York for further proceedings. On November 23, 2016, prior class counsel filed a petition to the United States Supreme Court, seeking review of the reversal of the settlement by the Second Circuit, and the Supreme Court denied the petition on March 27, 2017. On November 30, 2016, the district court appointed lead class counsel for a damages class and an equitable relief class. The parties have entered into a settlement agreement to resolve the money damages class claims pursuant to which defendants will pay a total of approximately $6.2 billion , which includes approximately $5.3 billion of funds remaining from the 2012 settlement and $900 million in additional funding. The Company's allocated responsibility for the additional funding is approximately $94.5 million . Plaintiffs filed a motion for preliminary approval of the settlement in September 2018. Several of the opt-out litigations were settled during the pendency of the Second Circuit appeal while others remain pending. Discovery is proceeding in the opt-out litigations and the equitable relief class case. LOW INCOME HOUSING TAX CREDITS Federal government agencies have undertaken formal or informal inquiries or investigations regarding the manner in which the Company purchased, and negotiated the purchase of, certain federal low income housing tax credits in connection with the financing of low income housing developments. MORTGAGE BANKRUPTCY LOAN MODIFICATION LITIGATION Plaintiffs, representing a putative class of mortgage borrowers who were debtors in Chapter 13 bankruptcy cases, filed a putative class action, Cotton, et al. v. Wells Fargo, et al. , against Wells Fargo & Company and Wells Fargo Bank, N.A. in the United States Bankruptcy Court for the Western District of North Carolina on June 7, 2017. Plaintiffs allege that Wells Fargo improperly and unilaterally modified the mortgages of borrowers who were debtors in Chapter 13 bankruptcy cases. Plaintiffs allege that Wells Fargo implemented these modifications by improperly filing mortgage payment change notices in Chapter 13 bankruptcy cases, in violation of bankruptcy rules and process. The amended complaint asserts claims based on, among other things, alleged fraud, violations of bankruptcy rules and laws, and unfair and deceptive trade practices. The amended complaint seeks monetary damages, attorneys’ fees, and declaratory and injunctive relief. The parties have entered into a settlement agreement pursuant to which the Company will pay $13.5 million to resolve the claims. On October 24, 2018, the court granted preliminary approval of the settlement and scheduled a final fairness hearing for March 4, 2019. MORTGAGE INTEREST RATE LOCK RELATED REGULATORY INVESTIGATION On April 20, 2018, the Company entered into consent orders with the OCC and BCFP to resolve, among other things, investigations by the agencies into the Company's compliance risk management program and its past practices involving certain automobile CPI policies and certain mortgage interest rate lock extensions. The consent orders require remediation to customers and the payment of a total of $1 billion in civil money penalties to the agencies. On October 4, 2017, the Company announced plans to reach out to all home lending customers who paid fees for mortgage rate lock extensions requested from September 16, 2013, through February 28, 2017, and to provide refunds, with interest, to customers who believe they should not have paid those fees. The Company was named in a putative class action, filed in the United States District Court for the Northern District of California, alleging violations of federal and state consumer fraud statutes relating to mortgage rate lock extension fees. The Company filed a motion to dismiss and the court granted the motion. Subsequently, a putative class action was filed in the United States District Court for the District of Oregon, raising similar allegations. In addition, former team members have asserted claims, including in pending litigation, that they were terminated for raising concerns regarding mortgage interest rate lock extension practices. Allegations related to mortgage interest rate lock extension fees are also among the subjects of two shareholder derivative lawsuits filed in California state court. This matter has also subjected the Company to formal or informal inquiries, investigations or examinations from other federal and state government agencies, including a multi-state attorneys general group. MORTGAGE-RELATED REGULATORY INVESTIGATIONS Federal and state government agencies, including the United States Department of Justice (Department of Justice), have been investigating or examining certain mortgage-related activities of Wells Fargo and predecessor institutions. Wells Fargo, for itself and for predecessor institutions, has responded, and continues to respond, to requests from these agencies seeking information regarding the origination, underwriting, and securitization of residential mortgages, including sub-prime mortgages. These agencies have advanced theories of purported liability with respect to certain of these activities. An agreement, pursuant to which the Company paid $2.09 billion , was reached to resolve the Department of Justice investigation, which related to certain 2005-2007 residential mortgage-backed securities activities. The amount was fully accrued as of June 30, 2018. Other financial institutions have entered into similar settlements with these agencies, the nature of which related to the specific activities of those financial institutions, including the imposition of significant financial penalties and remedial actions. OFAC RELATED INVESTIGATION The Company has self-identified an issue whereby certain foreign banks utilized a Wells Fargo software-based solution to conduct import/export trade-related financing transactions with countries and entities prohibited by the Office of Foreign Assets Control (OFAC) of the United States Department of the Treasury. We do not believe any funds related to these transactions flowed through accounts at Wells Fargo as a result of the aforementioned conduct. The Company has made voluntary self-disclosures to OFAC and is cooperating with an inquiry from the Department of Justice. ORDER OF POSTING LITIGATION Plaintiffs filed a series of putative class actions against Wachovia Bank, N.A. and Wells Fargo Bank, N.A., as well as many other banks, challenging the “high to low” order in which the banks post debit card transactions to consumer deposit accounts. Most of these actions were consolidated in multi-district litigation proceedings (MDL proceedings) in the United States District Court for the Southern District of Florida. The court in the MDL proceedings has certified a class of putative plaintiffs, and Wells Fargo moved to compel arbitration of the claims of unnamed class members. The court denied the motions to compel arbitration in October 2016, and Wells Fargo appealed this decision to the United States Court of Appeals for the Eleventh Circuit. In May 2018, the Eleventh Circuit ruled in Wells Fargo's favor and found that Wells Fargo had not waived its arbitration rights and remanded the case to the District Court for further proceedings. Plaintiffs filed a petition for rehearing to the Eleventh Circuit, which was denied in August 2018. RETAIL SALES PRACTICES MATTERS Federal, state, and local government agencies, including the Department of Justice, the United States Securities and Exchange Commission and the United States Department of Labor, and state attorneys general, including the New York Attorney General, and prosecutors’ offices, as well as Congressional committees, have undertaken formal or informal inquiries, investigations or examinations arising out of certain retail sales practices of the Company that were the subject of settlements with the BCFP, the OCC and the Office of the Los Angeles City Attorney announced by the Company on September 8, 2016. These matters are at varying stages. The Company has responded, and continues to respond, to requests from a number of the foregoing and has discussed the resolution of some of the matters, including with a multi-state attorneys general group. In October 2018, the Company entered into an agreement to resolve the New York Attorney General's investigation pursuant to which the Company will pay $65 million to the State of New York. In addition, a number of lawsuits have also been filed by non-governmental parties seeking damages or other remedies related to these retail sales practices. First, various class plaintiffs purporting to represent consumers who allege that they received products or services without their authorization or consent have brought separate putative class actions against the Company in the United States District Court for the Northern District of California and various other jurisdictions. In April 2017, the Company entered into a settlement agreement in the first-filed action, Jabbari v. Wells Fargo Bank, N.A ., to resolve claims regarding certain products or services provided without authorization or consent for the time period May 1, 2002 to April 20, 2017. Pursuant to the settlement, the Company will pay $142 million for remediation, attorneys’ fees, and settlement fund claims administration. In the unlikely event that the $142 million settlement total is not enough to provide remediation, pay attorneys' fees, pay settlement fund claims administration costs, and have at least $25 million left over to distribute to all class members, the Company will contribute additional funds to the settlement. In addition, in the unlikely event that the number of unauthorized accounts identified by settlement class members in the claims process and not disputed by the claims administrator exceeds plaintiffs’ 3.5 million account estimate, the Company will proportionately increase the $25 million reserve so that the ratio of reserve to unauthorized accounts is no less than what was implied by plaintiffs’ estimate at the time of the district court’s preliminary approval of the settlement in July 2017. The district court issued an order granting final approval of the settlement on June 14, 2018. Several appeals of the district court's order granting final approval of the settlement have been filed with the United States Court of Appeals for the Ninth Circuit. Second, Wells Fargo shareholders are pursuing a consolidated securities fraud class action in the United States District Court for the Northern District of California alleging certain misstatements and omissions in the Company’s disclosures related to sales practices matters. The Company has entered into a settlement agreement to resolve this matter pursuant to which the Company will pay $480 million . The amount was fully accrued as of March 31, 2018. The district court issued an order granting preliminary approval of the settlement on September 4, 2018. Third, Wells Fargo shareholders have brought numerous shareholder derivative lawsuits asserting breach of fiduciary duty claims, among others, against current and former directors and officers for their alleged failure to detect and prevent sales practices issues. These actions have been filed or transferred to the United States District Court for the Northern District of California and California state court for coordinated proceedings. An additional lawsuit asserting similar claims in Delaware state court has been stayed. Fourth, multiple employment litigation matters have been brought against Wells Fargo, including an Employee Retirement Income Security Act (ERISA) class action in the United States District Court for the District of Minnesota on behalf of 401(k) plan participants that has now been dismissed; a class action in the United States District Court for the Northern District of California on behalf of team members who allege that they protested sales practice misconduct and/or were terminated for not meeting sales goals that has now been dismissed, and we have entered into a framework with plaintiffs' counsel to address individual claims that have been asserted; various wage and hour class actions brought in federal and state court in California, New Jersey, and Pennsylvania on behalf of non-exempt branch based team members alleging that sales pressure resulted in uncompensated overtime; and multiple single plaintiff Sarbanes-Oxley Act complaints and state law whistleblower actions filed with the United States Department of Labor or in various state courts alleging adverse employment actions for raising sales practice misconduct issues. RMBS TRUSTEE LITIGATION In November 2014, a group of institutional investors (Institutional Investor Plaintiffs), including funds affiliated with BlackRock, Inc., filed a putative class action in the United States District Court for the Southern District of New York against Wells Fargo Bank, N.A., alleging claims against the Company in its capacity as trustee for a number of residential mortgage-backed securities (RMBS) trusts (Federal Court Complaint). Similar complaints have been filed against other trustees in various courts, including in the Southern District of New York, in New York state court, and in other states, by RMBS investors. The Federal Court Complaint alleges that Wells Fargo Bank, N.A., as trustee, caused losses to investors and asserts causes of action based upon, among other things, the trustee's alleged failure to notify and enforce repurchase obligations of mortgage loan sellers for purported breaches of representations and warranties, notify investors of alleged events of default, and abide by appropriate standards of care following alleged events of default. Plaintiffs seek money damages in an unspecified amount, reimbursement of expenses, and equitable relief. In December 2014 and December 2015, certain other investors filed four complaints alleging similar claims against Wells Fargo Bank, N.A. in the Southern District of New York (Related Federal Cases), and the various cases pending against Wells Fargo are proceeding before the same judge. On January 19, 2016, the Southern District of New York entered an order in connection with the Federal Court Complaint dismissing claims related to certain of the trusts at issue (Dismissed Trusts). The Company's motion to dismiss the Federal Court Complaint and the complaints for the Related Federal Cases was granted in part and denied in part in March 2017. In May 2017, the Company filed third-party complaints against certain investment advisors affiliated with the Institutional Investor Plaintiffs seeking contribution with respect to claims alleged in the Federal Court Complaint (Third-Party Claims). The investment advisors have moved to dismiss those complaints. On April 17, 2018, the Southern District of New York denied class certification in the Related Federal Case brought by Royal Park Investments SA/NV (Royal Park). A complaint raising similar allegations to the Federal Court Complaint was filed in May 2016 in New York state court by a different plaintiff investor. In December 2016, the Institutional Investor Plaintiffs filed a new putative class action complaint in New York state court in respect of 261 RMBS trusts, including the Dismissed Trusts, for which Wells Fargo Bank, N.A. serves or served as trustee (State Court Action). The Company has moved to dismiss the State Court Action. In July 2017, certain of the plaintiffs from the State Court Action filed a civil complaint relating to Wells Fargo Bank, N.A.'s setting aside reserves for legal fees and expenses in connection with the liquidation of eleven RMBS trusts at issue in the State Court Action (Declaratory Judgment Action). The complaint seeks, among other relief, declarations that Wells Fargo Bank, N.A. is not entitled to indemnification, the advancement of funds, or the taking of reserves from trust funds for legal fees and expenses it incurs in defending the claims in the State Court Action. In November 2017, the Company's motion to dismiss the complaint was granted. Plaintiffs filed a notice of appeal in January 2018. In September 2017, Royal Park filed a similar complaint in the Southern District of New York seeking declaratory and injunctive relief and money damages on an individual and class action basis (Royal Park Action). SEMINOLE TRIBE TRUSTEE LITIGATION The Seminole Tribe of Florida filed a complaint in Florida state court alleging that Wells Fargo, as trustee, charged excess fees in connection with the administration of a minor’s trust and failed to invest the assets of the trust prudently. The complaint was later amended to include three individual current and former beneficiaries as plaintiffs and to remove the Tribe as a party to the case. In December 2016, the Company filed a motion to dismiss the amended complaint on the grounds that the Tribe is a necessary party and that the individual beneficiaries lack standing to bring claims. The motion was denied in June 2018. WHOLESALE BANKING CONSENT ORDER INVESTIGATION On November 19, 2015, the Company entered into a consent order with the OCC, pursuant to which the Wholesale Banking group was required to implement customer due diligence standards that include collection of current beneficial ownership information for certain business customers. The Company is responding to recent inquiries from various federal government agencies regarding potentially inappropriate conduct in connection with the collection of beneficial ownership information. OUTLOOK As described above, the Company establishes accruals for legal actions when potential losses associated with the actions become probable and the costs can be reasonably estimated. The high end of the range of reasonably possible potential losses in excess of the Company’s accrual for probable and estimable losses was approximately $2.2 billion as of September 30, 2018 . The outcomes of legal actions are unpredictable and subject to significant uncertainties, and it is inherently difficult to determine whether any loss is probable or even possible. It is also inherently difficult to estimate the amount of any loss and there may be matters for which a loss is probable or reasonably possible but not currently estimable. Accordingly, actual losses may be in excess of the established accrual or the range of reasonably possible loss. Wells Fargo is unable to determine whether the ultimate resolution of the retail sales practices matters will have a material adverse effect on its consolidated financial condition. Based on information currently available, advice of counsel, available insurance coverage, and established reserves, Wells Fargo believes that the eventual outcome of other actions against Wells Fargo and/or its subsidiaries will not, individually or in the aggregate, have a material adverse effect on Wells Fargo’s consolidated financial condition. However, it is possible that the ultimate resolution of a matter, if unfavorable, may be material to Wells Fargo’s results of operations for any particular period.

Derivatives

Derivatives	9 Months Ended
	Sep. 30, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives	Note 14: Derivatives We use derivatives to manage exposure to market risk, including interest rate risk, credit risk and foreign currency risk, and to assist customers with their risk management objectives. We designate certain derivatives as hedging instruments in a qualifying hedge accounting relationship (fair value or cash flow hedge). Our remaining derivatives consist of economic hedges that do not qualify for hedge accounting and derivatives held for customer accommodation trading, or other purposes. For more information on our derivative activities, see Note 16 (Derivatives) to Financial Statements in our 2017 Form 10-K. Table 14.1 presents the total notional or contractual amounts and fair values for our derivatives. Derivative transactions can be measured in terms of the notional amount, but this amount is not recorded on the balance sheet and is not, when viewed in isolation, a meaningful measure of the risk profile of the instruments. The notional amount is generally not exchanged but is used only as the basis on which interest and other payments are determined. Table 14.1: Notional or Contractual Amounts and Fair Values of Derivatives September 30, 2018 December 31, 2017 Notional or contractual amount Fair value Notional or contractual amount Fair value (in millions) Derivative assets Derivative liabilities Derivative Derivative Derivatives designated as hedging instruments Interest rate contracts (1) $ 184,332 2,471 650 209,677 2,492 1,092 Foreign exchange contracts (1) 35,136 737 1,221 34,135 1,482 1,137 Total derivatives designated as qualifying hedging instruments 3,208 1,871 3,974 2,229 Derivatives not designated as hedging instruments Economic hedges: Interest rate contracts (2) 181,607 166 375 220,558 159 201 Equity contracts 15,764 929 210 12,315 716 138 Foreign exchange contracts 14,288 115 116 15,976 78 309 Credit contracts – protection purchased 101 26 — 111 37 — Subtotal 1,236 701 990 648 Customer accommodation trading and other derivatives: Interest rate contracts 8,156,678 13,426 14,518 6,434,673 14,979 14,179 Commodity contracts 72,559 4,205 1,716 62,530 2,354 1,335 Equity contracts 229,905 6,894 8,514 213,750 6,291 8,363 Foreign exchange contracts 333,715 5,582 5,032 362,896 7,413 7,122 Credit contracts – protection sold 9,185 94 141 9,021 147 214 Credit contracts – protection purchased 17,973 134 177 17,406 207 208 Subtotal 30,335 30,098 31,391 31,421 Total derivatives not designated as hedging instruments 31,571 30,799 32,381 32,069 Total derivatives before netting 34,779 32,670 36,355 34,298 Netting (3) (22,968 ) (24,084 ) (24,127 ) (25,502 ) Total $ 11,811 8,586 12,228 8,796 (1) Notional amounts presented exclude $0 million and $500 million of interest rate contracts at September 30, 2018 , and December 31, 2017 , respectively, for certain derivatives that are combined for designation as a hedge in a single relationship. The notional amount for foreign exchange contracts at September 30, 2018 , and December 31, 2017 , excludes $11.3 billion and $13.5 billion , respectively, for certain derivatives that are combined for designation as a hedge on a single instrument. (2) Includes economic hedge derivatives used to hedge the risk of changes in the fair value of residential MSRs, MLHFS, loans, derivative loan commitments and other interests held. (3) Represents balance sheet netting of derivative asset and liability balances, related cash collateral and portfolio level counterparty valuation adjustments. See Table 14.2 for further information. Table 14.2 provides information on the gross fair values of derivative assets and liabilities, the balance sheet netting adjustments and the resulting net fair value amount recorded on our balance sheet, as well as the non-cash collateral associated with such arrangements. We execute substantially all of our derivative transactions under master netting arrangements and reflect all derivative balances and related cash collateral subject to enforceable master netting arrangements on a net basis within the balance sheet. The “Gross amounts recognized” column in the following table includes $31.4 billion and $29.2 billion of gross derivative assets and liabilities, respectively, at September 30, 2018 , and $30.0 billion and $29.9 billion , respectively, at December 31, 2017 , with counterparties subject to enforceable master netting arrangements that are carried on the balance sheet net of offsetting amounts. The remaining gross derivative assets and liabilities of $3.4 billion and $3.5 billion , respectively, at September 30, 2018 , and $6.4 billion and $4.4 billion , respectively, at December 31, 2017 , include those with counterparties subject to master netting arrangements for which we have not assessed the enforceability because they are with counterparties where we do not currently have positions to offset, those subject to master netting arrangements where we have not been able to confirm the enforceability and those not subject to master netting arrangements. As such, we do not net derivative balances or collateral within the balance sheet for these counterparties. We determine the balance sheet netting adjustments based on the terms specified within each master netting arrangement. We disclose the balance sheet netting amounts within the column titled “Gross amounts offset in consolidated balance sheet.” Balance sheet netting adjustments are determined at the counterparty level for which there may be multiple contract types. For disclosure purposes, we allocate these netting adjustments to the contract type for each counterparty proportionally based upon the “Gross amounts recognized” by counterparty. As a result, the net amounts disclosed by contract type may not represent the actual exposure upon settlement of the contracts. We do not net non-cash collateral that we receive and pledge on the balance sheet. For disclosure purposes, we present the fair value of this non-cash collateral in the column titled “Gross amounts not offset in consolidated balance sheet (Disclosure-only netting)” within the table. We determine and allocate the Disclosure-only netting amounts in the same manner as balance sheet netting amounts. The “Net amounts” column within Table 14.2 represents the aggregate of our net exposure to each counterparty after considering the balance sheet and Disclosure-only netting adjustments. We manage derivative exposure by monitoring the credit risk associated with each counterparty using counterparty specific credit risk limits, using master netting arrangements and obtaining collateral. Derivative contracts executed in over-the-counter markets include bilateral contractual arrangements that are not cleared through a central clearing organization but are typically subject to master netting arrangements. The percentage of our bilateral derivative transactions outstanding at period end in such markets, based on gross fair value, is provided within the following table. Other derivative contracts executed in over-the-counter or exchange-traded markets are settled through a central clearing organization and are excluded from this percentage. In addition to the netting amounts included in the table, we also have balance sheet netting related to resale and repurchase agreements that are disclosed within Note 12 (Guarantees, Pledged Assets and Collateral, and Other Commitments). Table 14.2: Gross Fair Values of Derivative Assets and Liabilities (in millions) Gross amounts recognized Gross amounts offset in consolidated balance sheet (1) Net amounts in consolidated balance sheet Gross amounts not offset in consolidated balance sheet (Disclosure-only netting) (2) Net amounts Percent exchanged in over-the-counter market (3) September 30, 2018 Derivative assets Interest rate contracts $ 16,063 (10,905 ) 5,158 (104 ) 5,054 98 % Commodity contracts 4,205 (1,165 ) 3,040 (2 ) 3,038 92 Equity contracts 7,823 (5,646 ) 2,177 (494 ) 1,683 74 Foreign exchange contracts 6,434 (5,036 ) 1,398 (33 ) 1,365 100 Credit contracts – protection sold 94 (92 ) 2 — 2 13 Credit contracts – protection purchased 160 (124 ) 36 (2 ) 34 90 Total derivative assets $ 34,779 (22,968 ) 11,811 (635 ) 11,176 Derivative liabilities Interest rate contracts $ 15,543 (11,982 ) 3,561 (306 ) 3,255 98 % Commodity contracts 1,716 (823 ) 893 — 893 55 Equity contracts 8,724 (5,949 ) 2,775 (235 ) 2,540 84 Foreign exchange contracts 6,369 (5,023 ) 1,346 (61 ) 1,285 100 Credit contracts – protection sold 141 (140 ) 1 (1 ) — 84 Credit contracts – protection purchased 177 (167 ) 10 — 10 9 Total derivative liabilities $ 32,670 (24,084 ) 8,586 (603 ) 7,983 December 31, 2017 Derivative assets Interest rate contracts $ 17,630 (11,929 ) 5,701 (145 ) 5,556 99 % Commodity contracts 2,354 (966 ) 1,388 (4 ) 1,384 88 Equity contracts 7,007 (4,233 ) 2,774 (596 ) 2,178 76 Foreign exchange contracts 8,973 (6,656 ) 2,317 (25 ) 2,292 100 Credit contracts – protection sold 147 (145 ) 2 — 2 10 Credit contracts – protection purchased 244 (198 ) 46 (3 ) 43 89 Total derivative assets $ 36,355 (24,127 ) 12,228 (773 ) 11,455 Derivative liabilities Interest rate contracts $ 15,472 (13,226 ) 2,246 (1,078 ) 1,168 99 % Commodity contracts 1,335 (648 ) 687 (1 ) 686 76 Equity contracts 8,501 (4,041 ) 4,460 (400 ) 4,060 85 Foreign exchange contracts 8,568 (7,189 ) 1,379 (204 ) 1,175 100 Credit contracts – protection sold 214 (204 ) 10 (9 ) 1 85 Credit contracts – protection purchased 208 (194 ) 14 — 14 9 Total derivative liabilities $ 34,298 (25,502 ) 8,796 (1,692 ) 7,104 (1) Represents amounts with counterparties subject to enforceable master netting arrangements that have been offset in the consolidated balance sheet, including related cash collateral and portfolio level counterparty valuation adjustments. Counterparty valuation adjustments were $243 million and $245 million related to derivative assets and $108 million and $95 million related to derivative liabilities at September 30, 2018 , and December 31, 2017 , respectively. Cash collateral totaled $2.9 billion and $4.1 billion , netted against derivative assets and liabilities, respectively, at September 30, 2018 , and $2.7 billion and $4.2 billion , respectively, at December 31, 2017 . (2) Represents the fair value of non-cash collateral pledged and received against derivative assets and liabilities with the same counterparty that are subject to enforceable master netting arrangements. U.S. GAAP does not permit netting of such non-cash collateral balances in the consolidated balance sheet but requires disclosure of these amounts. (3) Represents derivatives executed in over-the-counter markets that are not settled through a central clearing organization. Over-the-counter percentages are calculated based on gross amounts recognized as of the respective balance sheet date. The remaining percentage represents derivatives settled through a central clearing organization, which are executed in either over-the-counter or exchange-traded markets. Fair Value and Cash Flow Hedges For fair value hedges, we use interest rate swaps to convert certain of our fixed-rate long-term debt and time certificates of deposit to floating rates to hedge our exposure to interest rate risk. We also enter into cross-currency swaps, cross-currency interest rate swaps and forward contracts to hedge our exposure to foreign currency risk and interest rate risk associated with the issuance of non-U.S. dollar denominated long-term debt. In addition, we use interest rate swaps, cross-currency swaps, cross-currency interest rate swaps and forward contracts to hedge against changes in fair value of certain investments in available-for-sale debt securities due to changes in interest rates, foreign currency rates, or both. We also use interest rate swaps to hedge against changes in fair value for certain mortgage loans held for sale. For cash flow hedges, we use interest rate swaps to hedge the variability in interest payments received on certain floating-rate commercial loans and paid on certain floating-rate debt due to changes in the contractually specified interest rate. We estimate $309 million pre-tax of deferred net losses primarily related to cash flow hedges in OCI at September 30, 2018 , will be reclassified into net interest income during the next twelve months. The deferred losses expected to be reclassified into net interest income are primarily related to discontinued hedges of floating rate loans. We are hedging our foreign exposure to the variability of future cash flows for all forecasted transactions for a maximum of 8 years . For more information on our accounting hedges, see Note 1 (Summary of Significant Accounting Policies) and Note 16 (Derivatives) to Financial Statements in our 2017 Form 10-K. Table 14.3 shows the net gains (losses) related to derivatives in fair value and cash flow hedging relationships. Table 14.3: Gains (Losses) Recognized in Consolidated Statement of Income on Fair Value and Cash Flow Hedging Relationships Net interest income Noninterest income (in millions) Debt securities Loans Mortgage loans held for sale Deposits Long-term debt Other Total Quarter ended September 30, 2018 Total amounts presented in the consolidated statement of income $ 3,595 11,116 210 (1,499 ) (1,667 ) 633 12,388 Gains (losses) on fair value hedging relationships Interest contracts Amounts related to interest settlements on derivatives (1) (34 ) — (1 ) (10 ) 39 — (6 ) Recognized on derivatives 386 — 10 (58 ) (1,119 ) — (781 ) Recognized on hedged items (410 ) — (12 ) 61 1,101 — 740 Foreign exchange contracts Amounts related to interest settlements on derivatives (1)(2) 8 — — — (118 ) — (110 ) Recognized on derivatives (3) 2 — — — (58 ) (139 ) (195 ) Recognized on hedged items (3 ) — — — 126 139 262 Net income (expense) recognized on fair value hedges (51 ) — (3 ) (7 ) (29 ) — (90 ) Gains (losses) on cash flow hedging relationships Interest contracts Realized gains (losses) (pre-tax) reclassified from cumulative OCI into net income (4) — (78 ) — — — — (78 ) Foreign exchange contracts Realized gains (losses) (pre-tax) reclassified from cumulative OCI into net income (4) $ — — — — (1 ) — (1 ) Net income (expense) recognized on cash flow hedges $ — (78 ) — — (1 ) — (78 ) Nine months ended September 30, 2018 Total amounts presented in the consolidated statement of income $ 10,603 32,607 587 (3,857 ) (4,901 ) 1,720 36,759 Gains (losses) on fair value hedging relationships Interest contracts Amounts related to interest settlements on derivatives (1) (158 ) — (3 ) (35 ) 291 — 95 Recognized on derivatives 1,692 1 21 (248 ) (4,331 ) — (2,865 ) Recognized on hedged items (1,730 ) (1 ) (27 ) 233 4,215 — 2,690 Foreign exchange contracts Amounts related to interest settlements on derivatives (1)(2) 23 — — — (300 ) — (277 ) Recognized on derivatives (3) 8 — — — (132 ) (889 ) (1,013 ) Recognized on hedged items (5 ) — — — 153 820 968 Net income (expense) recognized on fair value hedges (170 ) — (9 ) (50 ) (104 ) (69 ) (402 ) Gains (losses) on cash flow hedging relationships Interest contracts Realized gains (losses) (pre-tax) reclassified from cumulative OCI into net income (4) — (215 ) — — — — (215 ) Foreign exchange contracts Realized gains (losses) (pre-tax) reclassified from cumulative OCI into net income (4) — — — — (1 ) — (1 ) Net income (expense) recognized on cash flow hedges $ — (215 ) — — (1 ) — (216 ) (continued on following page) (continued from previous page) Net interest income Noninterest income (in millions) Debt securities Loans Mortgage loans held for sale Deposits Long-term debt Other Total Quarter ended September 30, 2017 Total amounts presented in the consolidated statement of income $ 3,253 10,522 217 (869 ) (1,391 ) 199 11,931 Gains (losses) on fair value hedging relationships Interest contracts Amounts related to interest settlements on derivatives (1) (110 ) — (1 ) 25 246 — 160 Recognized on derivatives (6 ) — — 1 (162 ) — (167 ) Recognized on hedged items (5 ) — (2 ) — 164 — 157 Foreign exchange contracts Amounts related to interest settlements on derivatives (1)(2) 4 — — — (60 ) — (56 ) Recognized on derivatives (3) — — — — (32 ) 851 819 Recognized on hedged items — — — — 15 (790 ) (775 ) Net income (expense) recognized on fair value hedges (117 ) — (3 ) 26 171 61 138 Gains (losses) on cash flow hedging relationships Interest contracts Realized gains (losses) (pre-tax) reclassified from cumulative OCI into net income (4) — 107 — — (2 ) — 105 Foreign exchange contracts Realized gains (losses) (pre-tax) reclassified from cumulative OCI into net income (4) — — — — — — — Net income (expense) recognized on cash flow hedges $ — 107 — — (2 ) — 105 Nine months ended September 30, 2017 Total amounts presented in the consolidated statement of income $ 9,652 31,021 590 (2,082 ) (3,813 ) 1,045 36,413 Gains (losses) on fair value hedging relationships Interest contracts Amounts related to interest settlements on derivatives (1) (363 ) (1 ) (4 ) 29 1,041 — 702 Recognized on derivatives (167 ) — (11 ) 30 (325 ) — (473 ) Recognized on hedged items 121 — 4 (22 ) 322 — 425 Foreign exchange contracts Amounts related to interest settlements on derivatives (1)(2) 10 — — — (142 ) — (132 ) Recognized on derivatives (3) 11 — — — (187 ) 2,727 2,551 Recognized on hedged items (7 ) — — — 215 (2,485 ) (2,277 ) Net income (expense) recognized on fair value hedges (395 ) (1 ) (11 ) 37 924 242 796 Gains (losses) on cash flow hedging relationships Interest contracts Realized gains (losses) (pre-tax) reclassified from cumulative OCI into net income (4) — 468 — — (8 ) — 460 Foreign exchange contracts Realized gains (losses) (pre-tax) reclassified from cumulative OCI into net income (4) — — — — — — — Net income (expense) recognized on cash flow hedges $ — 468 — — (8 ) — 460 (1) Includes $11 million and $35 million for third quarter and first nine months of 2018, respectively, and includes $12 million and $22 million for the third quarter and first nine months of 2017, respectively which represents changes in fair value due to the passage of time associated with the non-zero fair value amount at hedge inception. (2) The third quarter and first nine months of 2018 included $(5) million and $(3) million , respectively, and the third quarter and first nine months of 2017 included $(1) million , and $(2) million , respectively, of the time value component recognized as net interest income (expense) on forward derivatives hedging foreign currency debt securities and long-term debt that were excluded from the assessment of hedge effectiveness. (3) For certain fair value hedges of foreign currency risk, changes in fair value of cross-currency swaps attributable to changes in cross-currency basis spreads are excluded from the assessment of hedge effectiveness and recorded in other comprehensive income. See Note 20 (Other Comprehensive Income) for the amounts recognized in other comprehensive income. (4) See Note 20 (Other Comprehensive Income) for details of amounts reclassified to net income. Table 14.4 shows the carrying amount and associated cumulative basis adjustment related to the application of hedge accounting that is included in the carrying amount of hedged assets and liabilities in fair value hedging relationships. Table 14.4: Hedged Items in Fair Value Hedging Relationship Hedged Items Currently Designated Hedged Items No Longer Designated (1) (in millions) Carrying Amount of Assets/(Liabilities) (2)(4) Hedge Accounting Basis Adjustment Assets/(Liabilities) (3) Carrying Amount of Assets/(Liabilities) (4) Hedge Accounting Basis Adjustment September 30, 2018 Available-for-sale debt securities (5) $ 29,736 (1,008 ) 4,947 261 Loans — — — — Mortgage loans held for sale 681 (6 ) — — Deposits (45,282 ) 383 — — Long-term debt (127,072 ) 2,223 (808 ) 10 December 31, 2017 Available-for-sale debt securities (5) 32,498 870 5,221 343 Loans 140 (1 ) — — Mortgage loans held for sale 465 (1 ) — — Deposits (23,679 ) 158 — — Long-term debt (128,950 ) (2,154 ) (1,953 ) 16 (1) Represents hedged items no longer designated in qualifying fair value hedging relationships for which an associated basis adjustment exists at the balance sheet date. (2) Does not include the carrying amount of hedged items where only foreign currency risk is the designated hedged risk. The carrying amount excluded for debt securities is $1.3 billion and $(6.4) billion for long-term debt as of September 30, 2018 and $1.5 billion for debt securities and for long-term debt is $(7.7) billion as of December 31, 2017. (3) The balance includes $1.5 billion and $49 million of debt securities and long-term debt cumulative basis adjustments as of September 30, 2018, respectively, and $2.1 billion and $297 million of debt securities and long-term debt cumulative basis adjustments as of December 31, 2017, respectively, on terminated hedges whereby the hedged items have subsequently been re-designated into existing hedges. (4) Represents the full carrying amount of the hedged asset or liability item as of the balance sheet date, except for circumstances in which only a portion of the asset or liability was designated as the hedged item in which case only the portion designated is presented. (5) Carrying amount represents the amortized cost. Derivatives Not Designated as Hedging Instruments We use economic hedge derivatives to hedge the risk of changes in the fair value of certain residential MLHFS, residential MSRs measured at fair value, derivative loan commitments and other interests held. We also use economic hedge derivatives to mitigate the periodic earnings volatility caused by mismatches between the changes in fair value of the hedged item and hedging instrument recognized on our fair value accounting hedges. The resulting gain or loss on these economic hedge derivatives is reflected in mortgage banking noninterest income, net gains (losses) from equity investments and other noninterest income. The derivatives used to hedge MSRs measured at fair value, resulted in net derivative gains (losses) of $(501) million and $(2.0) billion in the third quarter and first nine months of 2018, respectively, and $240 million and $599 million in the third quarter and first nine months of 2017 , respectively which are included in mortgage banking noninterest income. The aggregate fair value of these derivatives was a net liability of $185 million at September 30, 2018 , and net asset of $89 million at December 31, 2017 . The change in fair value of these derivatives for each period end is due to changes in the underlying market indices and interest rates as well as the purchase and sale of derivative financial instruments throughout the period as part of our dynamic MSR risk management process. Loan commitments for mortgage loans that we intend to sell are considered derivatives. The aggregate fair value of derivative loan commitments on the balance sheet was a net negative fair value of $7 million and a positive fair value of $17 million at September 30, 2018 , and December 31, 2017 , respectively, and is included in the caption “Interest rate contracts” under “Customer accommodation trading and other derivatives” in Table 14.1 in this Note. For more information on economic hedges and other derivatives, see Note 16 (Derivatives) to Financial Statements in our 2017 Form 10-K. Table 14.5 shows the net gains (losses) recognized by income statement lines, related to derivatives not designated as hedging instruments. Table 14.5: Gains (Losses) on Derivatives Not Designated as Hedging Instruments Noninterest income (in millions) Mortgage banking Net gains (losses) from equity securities Net gains (losses) from trading activities Other Total Quarter ended September 30, 2018 Net gains (losses) recognized on economic hedges derivatives: Interest contracts (1) $ (334 ) — — (1 ) (335 ) Equity contracts — (719 ) — 8 (711 ) Foreign exchange contracts — — — 78 78 Credit contracts — — — 4 4 Subtotal (2) (334 ) (719 ) — 89 (964 ) Net gains (losses) recognized on customer accommodation trading and other derivatives: Interest contracts (3) (67 ) — 298 (1 ) 230 Equity contracts — — (1,147 ) (112 ) (1,259 ) Foreign exchange contracts — — 258 — 258 Credit contracts — — (28 ) — (28 ) Commodity contracts — — 14 — 14 Other — — — — — Subtotal (67 ) — (605 ) (113 ) (785 ) Net gains (losses) recognized related to derivatives not designated as hedging instruments $ (401 ) (719 ) (605 ) (24 ) (1,749 ) Nine months ended September 30, 2018 Net gains (losses) recognized on economic hedges derivatives: Interest contracts (1) $ (1,114 ) — — 5 (1,109 ) Equity contracts — (1,317 ) — 13 (1,304 ) Foreign exchange contracts — — — 405 405 Credit contracts — — — (2 ) (2 ) Subtotal (2) (1,114 ) (1,317 ) — 421 (2,010 ) Net gains (losses) recognized on customer accommodation trading and other derivatives: Interest contracts (3) (372 ) — 865 (1 ) 492 Equity contracts — — (33 ) (378 ) (411 ) Foreign exchange contracts — — 659 — 659 Credit contracts — — (22 ) — (22 ) Commodity contracts — — 88 — 88 Other — — — — — Subtotal (372 ) — 1,557 (379 ) 806 Net gains (losses) recognized related to derivatives not designated as hedging instruments $ (1,486 ) (1,317 ) 1,557 42 (1,204 ) (continued on following page) (continued from previous page) Noninterest income (in millions) Mortgage banking Net gains (losses) from equity securities Net gains (losses) from trading activities Other Total Quarter ended September 30, 2017 Net gains (losses) recognized on economic hedges derivatives: Interest contracts (1) $ 138 — — (19 ) 119 Equity contracts — (490 ) — 1 (489 ) Foreign exchange contracts — — — (300 ) (300 ) Credit contracts — — — (6 ) (6 ) Subtotal (2) 138 (490 ) — (324 ) (676 ) Net gains (losses) recognized on customer accommodation trading and other derivatives: Interest contracts (3) 152 — 17 — 169 Equity contracts — — (851 ) — (851 ) Foreign exchange contracts — — 155 — 155 Credit contracts — — (31 ) — (31 ) Commodity contracts — — 63 — 63 Other — — — 8 8 Subtotal 152 — (647 ) 8 (487 ) Net gains (losses) recognized related to derivatives not designated as hedging instruments $ 290 (490 ) (647 ) (316 ) (1,163 ) Nine months ended September 30, 2017 Net gains (losses) recognized on economic hedges derivatives: Interest contracts (1) $ 480 — — (64 ) 416 Equity contracts — (1,164 ) — (11 ) (1,175 ) Foreign exchange contracts — — — (834 ) (834 ) Credit contracts — — — 8 8 Subtotal (2) 480 (1,164 ) — (901 ) (1,585 ) Net gains (losses) recognized on customer accommodation trading and other derivatives: Interest contracts (3) 599 — 80 — 679 Equity contracts — — (2,525 ) — (2,525 ) Foreign exchange contracts — — 356 — 356 Credit contracts — — (59 ) — (59 ) Commodity contracts — — 138 — 138 Other — — — 22 22 Subtotal 599 — (2,010 ) 22 (1,389 ) Net gains (losses) recognized related to derivatives not designated as hedging instruments $ 1,079 (1,164 ) (2,010 ) (879 ) (2,974 ) (1) Includes gains (losses) on the derivatives used as economic hedges of MSRs measured at fair value, derivative loan commitments and mortgage loans held for sale. (2) Includes hedging gains (losses) of $10 million and $46 million for the third quarter and first nine months of 2018, respectively, and $(18) million and $(64) million for the third quarter and first nine months of 2017, respectively, which partially offset hedge accounting ineffectiveness. (3) Amounts presented in mortgage banking noninterest income are gains on derivative loan commitments. Credit Derivatives Credit derivative contracts are arrangements whose value is derived from the transfer of credit risk of a reference asset or entity from one party (the purchaser of credit protection) to another party (the seller of credit protection). We use credit derivatives to assist customers with their risk management objectives. We may also use credit derivatives in structured product transactions or liquidity agreements written to special purpose vehicles. The maximum exposure of sold credit derivatives is managed through posted collateral, purchased credit derivatives and similar products in order to achieve our desired credit risk profile. This credit risk management provides an ability to recover a significant portion of any amounts that would be paid under the sold credit derivatives. We would be required to perform under sold credit derivatives in the event of default by the referenced obligors. Events of default include events such as bankruptcy, capital restructuring or lack of principal and/or interest payment. In certain cases, other triggers may exist, such as the credit downgrade of the referenced obligors or the inability of the special purpose vehicle for which we have provided liquidity to obtain funding. Table 14.6 provides details of sold and purchased credit derivatives. Table 14.6: Sold and Purchased Credit Derivatives Notional amount (in millions) Fair value liability Protection sold (A) Protection sold – non- investment grade Protection purchased with identical underlyings (B) Net protection sold (A) - (B) Other protection purchased Range of maturities September 30, 2018 Credit default swaps on: Corporate bonds $ 23 1,906 391 1,266 640 1,300 2018 - 2027 Structured products 55 148 143 130 18 114 2022 - 2047 Credit protection on: Default swap index — 2,194 453 308 1,886 3,824 2018 - 2028 Commercial mortgage-backed securities index 53 402 122 375 27 51 2047 - 2058 Asset-backed securities index 9 43 43 42 1 1 2045 - 2046 Other 1 4,492 4,372 — 4,492 10,663 2018 - 2038 Total credit derivatives $ 141 9,185 5,524 2,121 7,064 15,953 December 31, 2017 Credit default swaps on: Corporate bonds $ 35 2,007 510 1,575 432 946 2018 - 2027 Structured products 86 267 252 232 35 153 2022 - 2047 Credit protection on: Default swap index — 2,626 540 308 2,318 3,932 2018 - 2027 Commercial mortgage-backed securities index 83 423 — 401 22 87 2047 - 2058 Asset-backed securities index 9 42 — 42 — 1 2045 - 2046 Other 1 3,656 3,306 — 3,656 9,840 2018 - 2031 Total credit derivatives $ 214 9,021 4,608 2,558 6,463 14,959 Protection sold represents the estimated maximum exposure to loss that would be incurred under an assumed hypothetical circumstance, where the value of our interests and any associated collateral declines to zero, without any consideration of recovery or offset from any economic hedges. We believe this hypothetical circumstance to be a remote possibility and accordingly, this required disclosure is not an indication of expected loss. The amounts under non-investment grade represent the notional amounts of those credit derivatives on which we have a higher risk of being required to perform under the terms of the credit derivative and are a function of the underlying assets. We consider the risk of performance to be high if the underlying assets under the credit derivative have an external rating that is below investment grade or an internal credit default grade that is equivalent thereto. We believe the net protection sold, which is representative of the net notional amount of protection sold and purchased with identical underlyings, in combination with other protection purchased, is more representative of our exposure to loss than either non-investment grade or protection sold. Other protection purchased represents additional protection, which may offset the exposure to loss for protection sold, that was not purchased with an identical underlying of the protection sold. Credit-Risk Contingent Features Certain of our derivative contracts contain provisions whereby if the credit rating of our debt were to be downgraded by certain major credit rating agencies, the counterparty could demand additional collateral or require termination or replacement of derivative instruments in a net liability position. The aggregate fair value of all derivative instruments with such credit-risk-related contingent features that are in a net liability position was $7.7 billion at September 30, 2018 , and $8.3 billion at December 31, 2017 , for which we posted $5.9 billion and $7.1 billion , respectively, in collateral in the normal course of business. A credit rating below investment grade is the credit-risk-related contingent feature that if triggered requires the maximum amount of collateral to be posted. If the credit rating of our debt had been downgraded below investment grade, on September 30, 2018 , or December 31, 2017 , we would have been required to post additional collateral of $1.8 billion or $1.2 billion , respectively, or potentially settle the contract in an amount equal to its fair value. Some contracts require that we provide more collateral than the fair value of derivatives that are in a net liability position if a dow

Fair Values of Assets and Liabi

Fair Values of Assets and Liabilities	9 Months Ended
	Sep. 30, 2018
Fair Value Disclosures [Abstract]
Fair Values of Assets and Liabilities	Note 15: Fair Values of Assets and Liabilities We use fair value measurements to record fair value adjustments to certain assets and liabilities and to determine fair value disclosures. Assets and liabilities recorded at fair value on a recurring basis are presented in Table 15.2 in this Note. From time to time, we may be required to record fair value adjustments on a nonrecurring basis. These nonrecurring fair value adjustments typically involve application of LOCOM accounting, measurement alternative accounting for nonmarketable equity securities or write-downs of individual assets. Assets recorded on a nonrecurring basis are presented in Table 15.13 in this Note. See Note 1 (Summary of Significant Accounting Policies) to Financial Statements in our 2017 Form 10-K for discussion of how we determine fair value. For descriptions of the valuation methodologies we use for assets and liabilities recorded at fair value on a recurring or nonrecurring basis and for estimating fair value for financial instruments that are not recorded at fair value, see Note 17 (Fair Values of Assets and Liabilities) to Financial Statements in our 2017 Form 10-K. FAIR VALUE HIERARCHY We group our assets and liabilities measured at fair value in three levels based on the markets in which the assets and liabilities are traded and the reliability of the assumptions used to determine fair value. These levels are: • Level 1 – Valuation is based upon quoted prices for identical instruments traded in active markets. • Level 2 – Valuation is based upon quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active, and model-based valuation techniques for which all significant assumptions are observable in the market. • Level 3 – Valuation is generated from techniques that use significant assumptions that are not observable in the market. These unobservable assumptions reflect estimates of assumptions that market participants would use in pricing the asset or liability. Valuation techniques include use of option pricing models, discounted cash flow models and similar techniques. We do not classify an equity security in the fair value hierarchy if we use the non-published net asset value (NAV) per share (or its equivalent) that has been communicated to us as an investor as a practical expedient to measure fair value. We generally use NAV per share as the fair value measurement for certain nonmarketable equity fund investments. Marketable equity securities with published NAVs continue to be classified in the fair value hierarchy. Fair Value Measurements from Vendors For certain assets and liabilities, we obtain fair value measurements from vendors, which predominantly consist of third-party pricing services, and record the unadjusted fair value in our financial statements. For additional information, see Note 17 (Fair Values of Assets and Liabilities) to Financial Statements in our 2017 Form 10-K. Table 15.1 presents unadjusted fair value measurements provided by brokers or third-party pricing services by fair value hierarchy level. Fair value measurements obtained from brokers or third-party pricing services that we have adjusted to determine the fair value recorded in our financial statements are excluded from Table 15.1 . Table 15.1: Fair Value Measurements by Brokers or Third-Party Pricing Services Brokers Third-party pricing services (in millions) Level 1 Level 2 Level 3 Level 1 Level 2 Level 3 September 30, 2018 Trading debt securities $ — — — — 212 — Available-for-sale debt securities: Securities of U.S. Treasury and federal agencies — — — 3,267 2,920 — Securities of U.S. states and political subdivisions — — — — 47,382 40 Mortgage-backed securities — 27 — — 160,382 41 Other debt securities (1) — 423 967 — 44,451 48 Total available-for-sale debt securities — 450 967 3,267 255,135 129 Equity securities: Marketable — — — — 224 — Nonmarketable — — — — 1 46 Total equity securities — — — — 225 46 Derivative assets — — — 34 — — Derivative liabilities — — — (38 ) — — Other liabilities (2) — — — — — — December 31, 2017 Trading debt securities $ — — — 926 215 — Available-for-sale debt securities: Securities of U.S. Treasury and federal agencies — — — 3,389 2,930 — Securities of U.S. states and political subdivisions — — — — 50,401 49 Mortgage-backed securities — 33 — — 168,948 75 Other debt securities (1) — 307 1,158 — 44,465 22 Total available-for-sale debt securities — 340 1,158 3,389 266,744 146 Equity securities: Marketable — — — — 227 — Nonmarketable — — — — — — Total equity securities — — — — 227 — Derivative assets — — — 19 — — Derivative liabilities — — — (19 ) — — Other liabilities (2) — — — — — — (1) Includes corporate debt securities, collateralized loan and other debt obligations, asset-backed securities, and other debt securities. (2) Includes short sale liabilities and other liabilities. Assets and Liabilities Recorded at Fair Value on a Recurring Basis Table 15.2 presents the balances of assets and liabilities recorded at fair value on a recurring basis. Table 15.2: Fair Value on a Recurring Basis (in millions) Level 1 Level 2 Level 3 Netting Total September 30, 2018 Trading debt securities: Securities of U.S. Treasury and federal agencies $ 14,234 3,184 — — 17,418 Securities of U.S. states and political subdivisions — 3,215 3 — 3,218 Collateralized loan obligations — 772 263 — 1,035 Corporate debt securities — 11,826 35 — 11,861 Mortgage-backed securities — 30,662 — — 30,662 Asset-backed securities — 960 — — 960 Other trading debt securities — 17 17 — 34 Total trading debt securities 14,234 50,636 318 — 65,188 Available-for-sale debt securities: Securities of U.S. Treasury and federal agencies 3,267 2,920 — — 6,187 Securities of U.S. states and political subdivisions — 47,621 595 — 48,216 Mortgage-backed securities: Federal agencies — 153,511 — — 153,511 Residential — 2,966 — — 2,966 Commercial — 3,932 41 — 3,973 Total mortgage-backed securities — 160,409 41 — 160,450 Corporate debt securities 35 6,191 388 — 6,614 Collateralized loan and other debt obligations (1) — 35,351 843 — 36,194 Asset-backed securities: Automobile loans and leases — 547 — — 547 Home equity loans — 124 — — 124 Other asset-backed securities — 4,229 402 — 4,631 Total asset-backed securities — 4,900 402 — 5,302 Other debt securities — 1 — — 1 Total available-for-sale debt securities 3,302 257,393 2,269 (2) — 262,964 Mortgage loans held for sale — 12,905 980 — 13,885 Loans held for sale — 1,244 22 — 1,266 Loans — — 286 — 286 Mortgage servicing rights (residential) — — 15,980 — 15,980 Derivative assets: Interest rate contracts 19 15,996 48 — 16,063 Commodity contracts — 4,129 76 — 4,205 Equity contracts 2,022 4,306 1,495 — 7,823 Foreign exchange contracts 34 6,391 9 — 6,434 Credit contracts — 172 82 — 254 Netting — — — (22,968 ) (3) (22,968 ) Total derivative assets 2,075 30,994 1,710 (22,968 ) 11,811 Equity securities - excluding securities at NAV: Marketable 30,799 1,044 — — 31,843 Nonmarketable — 33 6,328 — 6,361 Total equity securities $ 30,799 1,077 6,328 — 38,204 Total assets included in the fair value hierarchy $ 50,410 354,249 27,893 (22,968 ) 409,584 Equity securities at NAV (4) 118 Total assets recorded at fair value $ 409,702 Derivative liabilities: Interest rate contracts $ (16 ) (15,371 ) (156 ) — (15,543 ) Commodity contracts — (1,701 ) (15 ) — (1,716 ) Equity contracts (1,411 ) (5,544 ) (1,769 ) — (8,724 ) Foreign exchange contracts (38 ) (6,301 ) (30 ) — (6,369 ) Credit contracts — (263 ) (55 ) — (318 ) Netting — — — 24,084 (3) 24,084 Total derivative liabilities (1,465 ) (29,180 ) (2,025 ) 24,084 (8,586 ) Short sale liabilities: Securities of U.S. Treasury and federal agencies (14,334 ) (609 ) — — (14,943 ) Mortgage-backed securities — (121 ) — — (121 ) Corporate debt securities — (5,416 ) — — (5,416 ) Equity securities (3,506 ) (5 ) — — (3,511 ) Other securities — (1 ) — — (1 ) Total short sale liabilities (17,840 ) (6,152 ) — — (23,992 ) Other liabilities — — (2 ) — (2 ) Total liabilities recorded at fair value $ (19,305 ) (35,332 ) (2,027 ) 24,084 (32,580 ) (1) Includes collateralized debt obligations of $843 million . (2) A significant portion of the balance consists of securities that are investment grade based on ratings received from the ratings agencies or internal credit grades categorized as investment grade if external ratings are not available. The securities are classified as Level 3 due to limited market activity. (3) Represents balance sheet netting of derivative asset and liability balances and related cash collateral. See Note 14 (Derivatives) for additional information. (4) Consists of certain nonmarketable equity securities that are measured at fair value using NAV per share (or its equivalent) as a practical expedient and are excluded from the fair value hierarchy. (continued on following page) (continued from previous page) (in millions) Level 1 Level 2 Level 3 Netting Total December 31, 2017 Trading debt securities: Securities of U.S. Treasury and federal agencies $ 12,491 2,383 — — 14,874 Securities of U.S. states and political subdivisions — 3,732 3 — 3,735 Collateralized loan obligations — 565 354 — 919 Corporate debt securities — 11,760 31 — 11,791 Mortgage-backed securities — 25,273 — — 25,273 Asset-backed securities — 993 — — 993 Other trading debt securities — 20 19 — 39 Total trading debt securities 12,491 44,726 407 — 57,624 Available-for-sale debt securities: Securities of U.S. Treasury and federal agencies 3,389 2,930 — — 6,319 Securities of U.S. states and political subdivisions — 50,401 925 — 51,326 Mortgage-backed securities: Federal agencies — 160,219 — — 160,219 Residential — 4,607 1 — 4,608 Commercial — 4,490 75 — 4,565 Total mortgage-backed securities — 169,316 76 — 169,392 Corporate debt securities 56 7,203 407 — 7,666 Collateralized loan and other debt obligations (1) — 35,036 1,020 — 36,056 Asset-backed securities: Automobile loans and leases — 553 — — 553 Home equity loans — 149 — — 149 Other asset-backed securities — 4,380 566 — 4,946 Total asset-backed securities — 5,082 566 — 5,648 Other debt securities — — — — — Total available-for-sale debt securities 3,445 269,968 2,994 (2) — 276,407 Mortgage loans held for sale — 15,118 998 — 16,116 Loans held for sale — 1,009 14 — 1,023 Loans — — 376 — 376 Mortgage servicing rights (residential) — — 13,625 — 13,625 Derivative assets: Interest rate contracts 17 17,479 134 — 17,630 Commodity contracts — 2,318 36 — 2,354 Equity contracts 1,698 3,970 1,339 — 7,007 Foreign exchange contracts 19 8,944 10 — 8,973 Credit contracts — 269 122 — 391 Netting — — — (24,127 ) (3) (24,127 ) Total derivative assets 1,734 32,980 1,641 (24,127 ) 12,228 Equity securities - excluding securities at NAV: Marketable 33,931 429 — — 34,360 Nonmarketable — 46 4,821 — 4,867 Total equity securities $ 33,931 475 4,821 — 39,227 Total assets included in the fair value hierarchy $ 51,601 364,276 24,876 (24,127 ) 416,626 Equity securities at NAV (4) — Total assets recorded at fair value $ 416,626 Derivative liabilities: Interest rate contracts $ (17 ) (15,392 ) (63 ) — (15,472 ) Commodity contracts — (1,318 ) (17 ) — (1,335 ) Equity contracts (1,313 ) (5,338 ) (1,850 ) — (8,501 ) Foreign exchange contracts (19 ) (8,546 ) (3 ) — (8,568 ) Credit contracts — (336 ) (86 ) — (422 ) Netting — — — 25,502 (3) 25,502 Total derivative liabilities (1,349 ) (30,930 ) (2,019 ) 25,502 (8,796 ) Short sale liabilities: Securities of U.S. Treasury and federal agencies (10,420 ) (568 ) — — (10,988 ) Corporate debt securities — (4,986 ) — — (4,986 ) Equity securities (2,168 ) (45 ) — — (2,213 ) Other securities — (285 ) — — (285 ) Total short sale liabilities (12,588 ) (5,884 ) — — (18,472 ) Other liabilities — — (3 ) — (3 ) Total liabilities recorded at fair value $ (13,937 ) (36,814 ) (2,022 ) 25,502 (27,271 ) (1) Includes collateralized debt obligations of $1.0 billion . (2) Balance primarily consists of securities that are investment grade based on ratings received from the ratings agencies or internal credit grades categorized as investment grade if external ratings are not available. The securities are classified as Level 3 due to limited market activity. (3) Represents balance sheet netting of derivative asset and liability balances and related cash collateral. See Note 14 (Derivatives) for additional information. (4) Consists of certain nonmarketable equity securities that are measured at fair value using NAV per share (or its equivalent) as a practical expedient and are excluded from the fair value hierarchy. Changes in Fair Value Levels We monitor the availability of observable market data to assess the appropriate classification of financial instruments within the fair value hierarchy and transfer between Level 1, Level 2, and Level 3 accordingly. Observable market data includes but is not limited to quoted prices and market transactions. Changes in economic conditions or market liquidity generally will drive changes in availability of observable market data. Changes in availability of observable market data, which also may result in changing the valuation technique used, are generally the cause of transfers between Level 1, Level 2, and Level 3. The amounts reported as transfers represent the fair value as of the beginning of the quarter in which the transfer occurred. The changes in Level 3 assets and liabilities measured at fair value on a recurring basis for the quarter ended September 30, 2018 , are presented in Table 15.3 . Table 15.3: Changes in Level 3 Fair Value Assets and Liabilities on a Recurring Basis – Quarter ended September 30, 2018 Total net gains (losses) included in Purchases, sales, issuances and settlements, net (1) Net unrealized gains (losses) included in income related to assets and liabilities held at period end (in millions) Balance, beginning of period Net income Other compre- hensive income Transfers into Level 3 (2) Transfers out of Level 3 (3) Balance, end of period (4) Quarter ended September 30, 2018 Trading debt securities: Securities of U.S. states and political subdivisions $ 3 — — — — — 3 — Collateralized loan obligations 291 2 — (26 ) — (4 ) 263 1 Corporate debt securities 36 2 — 7 — (10 ) 35 2 Mortgage-backed securities — — — — — — — — Asset-backed securities — — — — — — — — Other trading debt securities 17 — — — — — 17 1 Total trading debt securities 347 4 — (19 ) — (14 ) 318 4 (5) Available-for-sale debt securities: Securities of U.S. states and political subdivisions 559 — (3 ) 39 — — 595 — Mortgage-backed securities: Residential — — 1 (1 ) — — — — Commercial 53 (1 ) — (11 ) — — 41 (1 ) Total mortgage-backed securities 53 (1 ) 1 (12 ) — — 41 (1 ) Corporate debt securities 443 2 (2 ) (55 ) — — 388 — Collateralized loan and other debt obligations 1,037 44 (33 ) (205 ) — — 843 — Asset-backed securities: Automobile loans and leases — — — — — — — — Other asset-backed securities 401 (4 ) (2 ) 7 — — 402 (3 ) Total asset-backed securities 401 (4 ) (2 ) 7 — — 402 (3 ) Total available-for-sale debt securities 2,493 41 (39 ) (226 ) — — 2,269 (4 ) (6) Mortgage loans held for sale 986 (12 ) — (8 ) 16 (2 ) 980 (12 ) (7) Loans held for sale 20 1 — 1 — — 22 — Loans 321 — — (35 ) — — 286 (5 ) (7) Mortgage servicing rights (residential)(8) 15,411 69 — 500 — — 15,980 531 (7) Net derivative assets and liabilities: Interest rate contracts (41 ) (103 ) — 36 — — (108 ) (43 ) Commodity contracts 26 29 — 6 — — 61 38 Equity contracts (339 ) (30 ) — 89 — 6 (274 ) (74 ) Foreign exchange contracts (15 ) (10 ) — 4 — — (21 ) (4 ) Credit contracts 24 5 — (2 ) — — 27 3 Other derivative contracts — — — — — — — — Total derivative contracts (345 ) (109 ) — 133 — 6 (315 ) (80 ) (9) Equity securities: Marketable — — — — — — — — Nonmarketable 5,806 817 — (295 ) — — 6,328 770 Total equity securities 5,806 817 — (295 ) — — 6,328 770 (10) Short sale liabilities — — — — — — — — (5) Other liabilities (2 ) — — — — — (2 ) — (7) (1) See Table 15.4 for detail. (2) All assets and liabilities transferred into level 3 were previously classified within level 2. (3) All assets and liabilities transferred out of level 3 are classified as level 2. (4) Represents only net gains (losses) that are due to changes in economic conditions and management’s estimates of fair value and excludes changes due to the collection/ realization of cash flows over time. (5) Included in net gains (losses) from trading activities in the income statement. (6) Included in net gains (losses) from debt securities in the income statement. (7) Included in mortgage banking and other noninterest income in the income statement. (8) For more information on the changes in mortgage servicing rights, see Note 10 (Mortgage Banking Activities). (9) Included in mortgage banking, trading activities, equity securities and other noninterest income in the income statement. (10) Included in net gains (losses) from equity securities in the income statement. (continued on following page) (continued from previous page) Table 15.4 presents gross purchases, sales, issuances and settlements related to the changes in Level 3 assets and liabilities measured at fair value on a recurring basis for the quarter ended September 30, 2018 . Table 15.4: Gross Purchases, Sales, Issuances and Settlements – Level 3 – Quarter ended September 30, 2018 (in millions) Purchases Sales Issuances Settlements Net Quarter ended September 30, 2018 Trading debt securities: Securities of U.S. states and political subdivisions $ — — — — — Collateralized loan obligations 75 (70 ) — (31 ) (26 ) Corporate debt securities 8 (1 ) — — 7 Mortgage-backed securities — — — — — Asset-backed securities — — — — — Other trading debt securities — — — — — Total trading debt securities 83 (71 ) — (31 ) (19 ) Available-for-sale debt securities: Securities of U.S. states and political subdivisions — — 69 (30 ) 39 Mortgage-backed securities: Residential — — — (1 ) (1 ) Commercial — — — (11 ) (11 ) Total mortgage-backed securities — — — (12 ) (12 ) Corporate debt securities — — — (55 ) (55 ) Collateralized loan and other debt obligations — (149 ) — (56 ) (205 ) Asset-backed securities: Automobile loans and leases — — — — — Other asset-backed securities — — 96 (89 ) 7 Total asset-backed securities — — 96 (89 ) 7 Total available-for-sale debt securities — (149 ) 165 (242 ) (226 ) Mortgage loans held for sale 17 (89 ) 104 (40 ) (8 ) Loans held for sale 1 — — — 1 Loans 2 — 5 (42 ) (35 ) Mortgage servicing rights (residential) (1) — (2 ) 502 — 500 Net derivative assets and liabilities: Interest rate contracts — — — 36 36 Commodity contracts — — — 6 6 Equity contracts 3 (37 ) — 123 89 Foreign exchange contracts — — — 4 4 Credit contracts 1 (2 ) — (1 ) (2 ) Other derivative contracts — — — — — Total derivative contracts 4 (39 ) — 168 133 Equity securities: Marketable — — — — — Nonmarketable — — — (295 ) (295 ) Total equity securities — — — (295 ) (295 ) Short sale liabilities — — — — — Other liabilities — — — — — (1) For more information on the changes in mortgage servicing rights, see Note 10 (Mortgage Banking Activities). The changes in Level 3 assets and liabilities measured at fair value on a recurring basis for the quarter ended September 30, 2017 , are presented in Table 15.5 . Table 15.5: Changes in Level 3 Fair Value Assets and Liabilities on a Recurring Basis – Quarter ended September 30, 2017 Balance, beginning of period Total net gains (losses) included in Purchases, sales, issuances and settlements, net (1) Net unrealized gains (losses) included in income related to assets and liabilities held at period end (in millions) Net income Other compre- hensive income Transfers into Level 3 (2) Transfers out of Level 3 (3) Balance, end of period (4) Quarter ended September 30, 2017 Trading debt securities: Securities of U.S. states and political subdivisions $ 9 — — (6 ) — — 3 — Collateralized loan obligations 403 — — (20 ) — — 383 (4 ) Corporate debt securities 26 — — 6 2 — 34 — Mortgage-backed securities — — — — — — — — Asset-backed securities — — — — — — — — Other trading debt securities 25 — — — — — 25 — Total trading debt securities 463 — — (20 ) 2 — 445 (4 ) (5) Available-for-sale debt securities: Securities of U.S. states and political subdivisions 1,557 3 3 (19 ) — (838 ) 706 — Mortgage-backed securities: Residential 1 — — — — — 1 — Commercial 75 — 1 — — — 76 — Total mortgage-backed securities 76 — 1 — — — 77 — Corporate debt securities 376 1 4 (1 ) — — 380 — Collateralized loan and other debt obligations 1,002 7 25 (20 ) — — 1,014 — Asset-backed securities: Automobile loans and leases — — — — — — — — Other asset-backed securities 872 1 2 (240 ) — — 635 — Total asset-backed securities 872 1 2 (240 ) — — 635 — Total available-for-sale debt securities 3,883 12 35 (280 ) — (838 ) 2,812 — (6) Mortgage loans held for sale 995 (10 ) — (6 ) 55 (2 ) 1,032 (11 ) (7) Loans held for sale 14 — — (1 ) 18 — 31 — Loans 443 — — (33 ) — — 410 (3 ) (7) Mortgage servicing rights (residential) (8) 12,789 (661 ) — 1,210 — — 13,338 (142 ) (7) Net derivative assets and liabilities: Interest rate contracts 115 158 — (159 ) — — 114 8 Commodity contracts 17 (16 ) — 9 2 — 12 7 Equity contracts (471 ) (70 ) — (27 ) (17 ) (6 ) (591 ) (130 ) Foreign exchange contracts 4 3 — — — — 7 1 Credit contracts 72 (6 ) — (13 ) — — 53 (6 ) Other derivative contracts (34 ) 8 — — — — (26 ) 8 Total derivative contracts (297 ) 77 — (190 ) (15 ) (6 ) (431 ) (112 ) (9) Equity securities: Marketable — — — — — — — — Nonmarketable 3,960 513 — — — — 4,473 513 Total equity securities 3,960 513 — — — — 4,473 513 (10) Short sale liabilities — — — (3 ) — — (3 ) — (5) Other liabilities (3 ) — — — — — (3 ) — (7) (1) See Table 15.6 for detail. (2) All assets and liabilities transferred into level 3 were previously classified within level 2. (3) All assets and liabilities transferred out of level 3 are classified as level 2. (4) Represents only net gains (losses) that are due to changes in economic conditions and management’s estimates of fair value and excludes changes due to the collection/realization of cash flows over time. (5) Included in net gains (losses) from trading activities in the income statement. (6) Included in net gains (losses) from debt securities in the income statement. (7) Included in mortgage banking and other noninterest income in the income statement. (8) For more information on the changes in mortgage servicing rights, see Note 10 (Mortgage Banking Activities). (9) Included in mortgage banking, trading activities, equity securities and other noninterest income in the income statement. (10) Included in net gains (losses) from equity securities in the income statement. (continued on following page) (continued from previous page) Table 15.6 presents gross purchases, sales, issuances and settlements related to the changes in Level 3 assets and liabilities measured at fair value on a recurring basis for the quarter ended September 30, 2017 . Table 15.6: Gross Purchases, Sales, Issuances and Settlements – Level 3 – Quarter ended September 30, 2017 (in millions) Purchases Sales Issuances Settlements Net Quarter ended September 30, 2017 Trading debt securities: Securities of U.S. states and political subdivisions $ 30 (35 ) — (1 ) (6 ) Collateralized loan obligations 51 (36 ) — (35 ) (20 ) Corporate debt securities 9 (3 ) — — 6 Mortgage-backed securities — — — — — Asset-backed securities — — — — — Other trading debt securities — — — — — Total trading debt securities 90 (74 ) — (36 ) (20 ) Available-for-sale debt securities: Securities of U.S. states and political subdivisions — (68 ) 98 (49 ) (19 ) Mortgage-backed securities: Residential — — — — — Commercial — — — — — Total mortgage-backed securities — — — — — Corporate debt securities — — — (1 ) (1 ) Collateralized loan and other debt obligations 6 — — (26 ) (20 ) Asset-backed securities: Automobile loans and leases — — — — — Other asset-backed securities — — 16 (256 ) (240 ) Total asset-backed securities — — 16 (256 ) (240 ) Total available-for-sale debt securities 6 (68 ) 114 (332 ) (280 ) Mortgage loans held for sale 17 (130 ) 147 (40 ) (6 ) Loans held for sale — (1 ) — — (1 ) Loans 2 — 5 (40 ) (33 ) Mortgage servicing rights (residential) (1) 541 64 605 — 1,210 Net derivative assets and liabilities: Interest rate contracts — — — (159 ) (159 ) Commodity contracts — — — 9 9 Equity contracts — (48 ) — 21 (27 ) Foreign exchange contracts — — — — — Credit contracts 1 — — (14 ) (13 ) Other derivative contracts — — — — — Total derivative contracts 1 (48 ) — (143 ) (190 ) Equity securities: Marketable — — — — — Nonmarketable — — — — — Total equity securities — — — — — Short sale liabilities — (3 ) — — (3 ) Other liabilities — — — — — (1) For more information on the changes in mortgage servicing rights, see Note 10 (Mortgage Banking Activities). The changes in Level 3 assets and liabilities measured at fair value on a recurring basis for the first nine months of 2018 , are presented in Table 15.7 . Table 15.7: Changes in Level 3 Fair Value Assets and Liabilities on a Recurring Basis – Nine months ended September 30, 2018 Total net gains (losses) included in Purchases, sales, issuances and settlements, net (1) Net unrealized gains (losses) included in income related to assets and liabilities held at period end (in millions) Balance, beginning of period Net income Other compre- hensive income Transfers into Level 3 (2) Transfers out of Level 3 (3) Balance, end of period (4) Nine months ended September 30, 2018 Trading debt securities: Securities of U.S. states and political subdivisions $ 3 — — — — — 3 — Collateralized loan obligations 354 (2 ) — (85 ) — (4 ) 263 — Corporate debt securities 31 2 — 13 — (11 ) 35 4 Mortgage-backed securities — — — — — — — — Asset-backed securities — — — — — — — — Other trading debt securities 19 (2 ) — — — — 17 — Total trading debt securities 407 (2 ) — (72 ) — (15 ) 318 4 (5) Available-for-sale debt securities: Securities of U.S. states and political subdivisions 925 5 (5 ) (51 ) — (279 ) 595 — Mortgage-backed securities: Residential 1 — — (1 ) — — — — Commercial 75 — (2 ) (32 ) — — 41 (2 ) Total mortgage-backed securities 76 — (2 ) (33 ) — — 41 (2 ) Corporate debt securities 407 4 2 (25 ) — — 388 — Collateralized loan and other debt obligations 1,020 55 20 (252 ) — — 843 — Asset-backed securities: Automobile loans and leases — — — — — — — — Other asset-backed securities 566 4 (10 ) (158 ) — — 402 (3 ) Total asset-backed securities 566 4 (10 ) (158 ) — — 402 (3 ) Total available-for-sale debt securities 2,994 68 5 (519 ) — (279 ) 2,269 (5 ) (6) Mortgage loans held for sale 998 (46 ) — (20 ) 56 (8 ) 980 (42 ) (7) Loans held for sale 14 2 — (15 ) 21 — 22 — Loans 376 (1 ) — (89 ) — — 286 (9 ) (7) Mortgage servicing rights (residential) (8) 13,625 801 — 1,554 — — 15,980 2,206 (7) Net derivative assets and liabilities: Interest rate contracts 71 (511 ) — 332 — — (108 ) (163 ) Commodity contracts 19 59 — (20 ) 3 — 61 60 Equity contracts (511 ) 27 — 153 — 57 (274 ) (67 ) Foreign exchange contracts 7 (35 ) — 7 — — (21 ) (23 ) Credit contracts 36 1 — (10 ) — — 27 (6 ) Other derivative contracts — — — — — — — — Total derivative contracts (378 ) (459 ) — 462 3 57 (315 ) (199 ) (9) Equity securities: Marketable — — — — — — — — Nonmarketable (10) 5,203 1,510 — (391 ) 10 (4 ) 6,328 1,457 Total equity securities 5,203 1,510 — (391 ) 10 (4 ) 6,328 1,457 (11) Short sale liabilities — — — — — — — — (5) Other liabilities (3 ) 1 — — — — (2 ) — (7) (1) See Table 15.8 for detail. (2) All assets and liabilities transferred into level 3 were previously classified within level 2. (3) All assets and liabilities transferred out of level 3 are classified as level 2. (4) Represents only net gains (losses) that are due to changes in economic conditions and management’s estimates of fair value and excludes changes due to the collection/realization of cash flows over time. (5) Included in net gains (losses) from trading activities in the income statement. (6) Included in net gains (losses) from debt securities in the income statement. (7) Included in mortgage banking and other noninterest income in the income statement. (8) For more information on the changes in mortgage servicing rights, see Note 10 (Mortgage Banking Activities). (9) Included in mortgage banking, trading activities, equity securities and other noninterest income in the income statement. (10) Beginning balance includes $382 million of auction rate securities, which changed from the cost to fair value method of accounting in connection with the adoption of ASU 2016-01 in first quarter 2018. (11) Included in net gains (losses) from equity securities in the income statement. (continued on following page) (continued from previous page) Table 15.8 presents gross purchases, sales, issuances and settlements related to the changes in Level 3 assets and liabilities measured at fair value on a recurring basis for the first nine months of 2018 . Table 15.8: Gross Purchases, Sales, Issuances and Settlements – Level 3 – Nine months ended September 30, 2018 (in millions) Purchases Sales Issuances Settlements Net Nine months ended September 30, 2018 Trading debt securities: Securities of U.S. states and political subdivisions $ — — — — — Collateralized loan obligations 346 (300 ) — (131 ) (85 ) Corporate debt securities 16 (3 ) — — 13 Mortgage-backed securities — — — — — Asset-backed securities — — — — — Other trading debt securities — — — — — Total trading debt securities 362 (303 ) — (131 ) (72 ) Available-for-sale debt securities: Securities of U.S. states and political subdivisions — (4 ) 79 (126 ) (51 ) Mortgage-backed securities: Residential — — — (1 ) (1 ) Commercial — — — (32 ) (32 ) Total mortgage-backed securities — — — (33 ) (33 ) Corporate debt securities 31 — — (56 ) (25 ) Collateralized loan and other debt obligations — (149 ) — (103 ) (252 ) Asset-backed securities: Automobile loans and leases — — — — — Other asset-backed securities — (8 ) 154 (304 ) (158 ) Total asset-backed securities — (8 ) 154 (304 ) (158 ) Total available-for-sale debt securities 31 (161 ) 233 (622 ) (519 ) Mortgage loans held for sale 64 (240 ) 271 (115 ) (20 ) Loans held for sale 1 (16 ) — — (15 ) Loans 3 — 13 (105 ) (89 ) Mortgage servicing rights (residential) (1) — (7 ) 1,561 — 1,554 Net derivative assets and liabilities: Interest rate contracts — — — 332 332 Commodity contracts — — — (20 ) (20 ) Equity contracts 3 (37 ) — 187 153 Foreign exchange contracts — — — 7 7 Credit contracts 9 (6 ) — (13 ) (10 ) Other derivative contracts — — — — — Total derivative contracts 12 (43 ) — 493 462 Equity securities: Marketable — — — — — Nonmarketable — (17 ) — (374 ) (391 ) Total equity securities — (17 ) — (374 ) (391 ) Short sale liabilities — — — — — Other liabilities — — — — — (1) For more information on the changes in mortgage servicing rights, see Note 10 (Mortgage Banking Activities). The changes in Level 3 assets and liabilities measured at fair value on a recurring basis for the first nine months of 2017 , are presented in Table 15.9 . Table 15.9: Changes in Level 3 Fair Value Assets and Liabilities on a Recurring Basis – Nine months ended September 30, 2017 Balance, beginning of period Total net gains (losses) included in Purchases, sales, issuances and settlements, net (1) Net unrealized gains (losses) included in income related to assets and liabilities held at period end (in millions) Net income Other compre- hensive income Transfers into Level 3 (2) Transfers out of Level 3 (3) Balance, end of period (4) Nine months ended September 30, 2017 Trading debt securities: Securities of U.S. states and $ 3 — — — — — 3 — Collateralized loan obligations 309 (3 ) — 77 — — 383 (12 ) Corporate debt securities 34 1 — (5 ) 5 (1 ) 34 — Mortgage-backed securities — — — — — — — — Asset-backed securities — — — — — — — — Other trading debt securities 28 (3 ) — — — — 25 (2 ) Total trading debt securities 374 (5 ) — 72 5 (1 ) 445 (14 ) (5) Available-for-sale debt securities: Securities of U.S. states and political subdivisions 1,140 4 7 884 5 (1,334 ) 706 — Mortgage-backed securities: Residential 1 — — — — — 1 — Commercial 91 (6 ) — (9 ) — — 76 (11 ) Total mortgage-backed securities 92 (6 ) — (9 ) — — 77 (11 ) Corporate debt securities 432 (13 ) 14 (53 ) — — 380 — Collateralized loan and other debt obligations 879 17 70 48 — — 1,014 — Asset-backed securities: Automobile loans and leases — — — — — — — — Other asset-backed securities 962 1 5 (333 ) — — 635 — Total asset-backed securities 962 1 5 (333 ) — — 635 — Total available-for-sale debt securities 3,505 3 96 537 5 (1,334 ) 2,812 (11 ) (6) Mortgage loans held for sale 98

Preferred Stock

Preferred Stock	9 Months Ended
	Sep. 30, 2018
Preferred Stock [Abstract]
Preferred Stock	Note 16: Preferred Stock We are authorized to issue 20 million shares of preferred stock and 4 million shares of preference stock, both without par value. Preferred shares outstanding rank senior to common shares both as to dividends and liquidation preference but have no general voting rights. We have not issued any preference shares under this authorization. If issued, preference shares would be limited to one vote per share. Our total authorized, issued and outstanding preferred stock is presented in the following two tables along with the Employee Stock Ownership Plan (ESOP) Cumulative Convertible Preferred Stock. Table 16.1: Preferred Stock Shares September 30, 2018 December 31, 2017 Liquidation preference per share Shares authorized and designated Liquidation preference per share Shares authorized and designated DEP Shares Dividend Equalization Preferred Shares (DEP) $ 10 97,000 $ 10 97,000 Series I Floating Class A Preferred Stock (1) 100,000 25,010 100,000 25,010 Series J 8.00% Non-Cumulative Perpetual Class A Preferred Stock (2) — — 1,000 2,300,000 Series K Floating Non-Cumulative Perpetual Class A Preferred Stock (3) 1,000 3,500,000 1,000 3,500,000 Series L 7.50% Non-Cumulative Perpetual Convertible Class A Preferred Stock 1,000 4,025,000 1,000 4,025,000 Series N 5.20% Non-Cumulative Perpetual Class A Preferred Stock 25,000 30,000 25,000 30,000 Series O 5.125% Non-Cumulative Perpetual Class A Preferred Stock 25,000 27,600 25,000 27,600 Series P 5.25% Non-Cumulative Perpetual Class A Preferred Stock 25,000 26,400 25,000 26,400 Series Q 5.85% Fixed-to-Floating Non-Cumulative Perpetual Class A Preferred Stock 25,000 69,000 25,000 69,000 Series R 6.625% Fixed-to-Floating Non-Cumulative Perpetual Class A Preferred Stock 25,000 34,500 25,000 34,500 Series S 5.90% Fixed-to-Floating Non-Cumulative Perpetual Class A Preferred Stock 25,000 80,000 25,000 80,000 Series T 6.00% Non-Cumulative Perpetual Class A Preferred Stock 25,000 32,200 25,000 32,200 Series U 5.875% Fixed-to-Floating Non-Cumulative Perpetual Class A Preferred Stock 25,000 80,000 25,000 80,000 Series V 6.00% Non-Cumulative Perpetual Class A Preferred Stock 25,000 40,000 25,000 40,000 Series W 5.70% Non-Cumulative Perpetual Class A Preferred Stock 25,000 40,000 25,000 40,000 Series X 5.50% Non-Cumulative Perpetual Class A Preferred Stock 25,000 46,000 25,000 46,000 Series Y 5.625% Non-Cumulative Perpetual Class A Preferred Stock 25,000 27,600 25,000 27,600 ESOP Cumulative Convertible Preferred Stock (4) — 1,674,596 — 1,556,104 Total 9,854,906 12,036,414 (1) Floating rate for Preferred Stock, Series I, is the greater of three-month LIBOR plus 0.93% and 5.56975%. (2) Preferred Stock, Series J, was redeemed in third quarter 2018. (3) Effective June 15, 2018, Preferred Stock, Series K, converted from a fixed to a floating coupon rate of three-month LIBOR plus 3.77%. (4) See the ESOP Cumulative Convertible Preferred Stock section in this Note for additional information about the liquidation preference for the ESOP Cumulative Convertible Preferred Stock. Table 16.2: Preferred Stock – Shares Issued and Carrying Value September 30, 2018 December 31, 2017 (in millions, except shares) Shares issued and outstanding Liquidation preference value Carrying value Discount Shares issued and outstanding Liquidation preference value Carrying value Discount DEP Shares Dividend Equalization Preferred Shares (DEP) 96,546 $ — — — 96,546 $ — — — Series I (1)(2) Floating Class A Preferred Stock 25,010 2,501 2,501 — 25,010 2,501 2,501 — Series J (1)(3) 8.00% Non-Cumulative Perpetual Class A Preferred Stock — — — — 2,150,375 2,150 1,995 155 Series K (1)(4) Floating Non-Cumulative Perpetual Class A Preferred Stock 3,352,000 3,352 2,876 476 3,352,000 3,352 2,876 476 Series L (1) 7.50% Non-Cumulative Perpetual Convertible Class A Preferred Stock 3,968,000 3,968 3,200 768 3,968,000 3,968 3,200 768 Series N (1) 5.20% Non-Cumulative Perpetual Class A Preferred Stock 30,000 750 750 — 30,000 750 750 — Series O (1) 5.125% Non-Cumulative Perpetual Class A Preferred Stock 26,000 650 650 — 26,000 650 650 — Series P (1) 5.25% Non-Cumulative Perpetual Class A Preferred Stock 25,000 625 625 — 25,000 625 625 — Series Q (1) 5.85% Fixed-to-Floating Non-Cumulative Perpetual Class A Preferred Stock 69,000 1,725 1,725 — 69,000 1,725 1,725 — Series R (1) 6.625% Fixed-to-Floating Non-Cumulative Perpetual Class A Preferred Stock 33,600 840 840 — 33,600 840 840 — Series S (1) 5.90% Fixed-to-Floating Non-Cumulative Perpetual Class A Preferred Stock 80,000 2,000 2,000 — 80,000 2,000 2,000 — Series T (1) 6.00% Non-Cumulative Perpetual Class A Preferred Stock 32,000 800 800 — 32,000 800 800 — Series U (1) 5.875% Fixed-to-Floating Non-Cumulative Perpetual Class A Preferred Stock 80,000 2,000 2,000 — 80,000 2,000 2,000 — Series V (1) 6.00% Non-Cumulative Perpetual Class A Preferred Stock 40,000 1,000 1,000 — 40,000 1,000 1,000 — Series W (1) 5.70% Non-Cumulative Perpetual Class A Preferred Stock 40,000 1,000 1,000 — 40,000 1,000 1,000 — Series X (1) 5.50% Non-Cumulative Perpetual Class A Preferred Stock 46,000 1,150 1,150 — 46,000 1,150 1,150 — Series Y (1) 5.625% Non-Cumulative Perpetual Class A Preferred Stock 27,600 690 690 — 27,600 690 690 — ESOP Cumulative Convertible Preferred Stock 1,674,596 1,675 1,675 — 1,556,104 1,556 1,556 — Total 9,645,352 $ 24,726 23,482 1,244 11,677,235 $ 26,757 25,358 1,399 (1) Preferred shares qualify as Tier 1 capital. (2) Floating rate for Preferred Stock, Series I, is the greater of three-month LIBOR plus 0.93% and 5.56975%. (3) Preferred Stock, Series J, was redeemed in third quarter 2018. (4) Effective June 15, 2018, Preferred Stock, Series K, converted from a fixed to a floating coupon rate of three-month LIBOR plus 3.77%. See Note 9 (Securitizations and Variable Interest Entities) for additional information on our trust preferred securities. ESOP CUMULATIVE CONVERTIBLE PREFERRED STOCK All shares of our ESOP Cumulative Convertible Preferred Stock (ESOP Preferred Stock) were issued to a trustee acting on behalf of the Wells Fargo & Company 401(k) Plan (the 401(k) Plan). Dividends on the ESOP Preferred Stock are cumulative from the date of initial issuance and are payable quarterly at annual rates based upon the year of issuance. Each share of ESOP Preferred Stock released from the unallocated reserve of the 401(k) Plan is converted into shares of our common stock based on the stated value of the ESOP Preferred Stock and the then current market price of our common stock. The ESOP Preferred Stock is also convertible at the option of the holder at any time, unless previously redeemed. We have the option to redeem the ESOP Preferred Stock at any time, in whole or in part, at a redemption price per share equal to the higher of (a) $1,000 per share plus accrued and unpaid dividends or (b) the fair market value, as defined in the Certificates of Designation for the ESOP Preferred Stock. Table 16.3: ESOP Preferred Stock Shares issued and outstanding Carrying value Adjustable dividend rate (in millions, except shares) Sep 30, Dec 31, Sep 30, Dec 31, Minimum Maximum ESOP Preferred Stock $1,000 liquidation preference per share 2018 605,081 — $ 605 — 7.00 % 8.00 2017 222,210 273,210 222 273 7.00 8.00 2016 233,835 322,826 234 323 9.30 10.30 2015 144,338 187,436 144 187 8.90 9.90 2014 174,151 237,151 174 237 8.70 9.70 2013 133,948 201,948 134 202 8.50 9.50 2012 77,634 128,634 78 129 10.00 11.00 2011 61,796 129,296 62 129 9.00 10.00 2010 21,603 75,603 22 76 9.50 10.50 Total ESOP Preferred Stock (1) 1,674,596 1,556,104 $ 1,675 1,556 Unearned ESOP shares (2) $ (1,780 ) (1,678 ) (1) At September 30, 2018 and December 31, 2017 , additional paid-in capital included $105 million and $122 million , respectively, related to ESOP preferred stock. (2) We recorded a corresponding charge to unearned ESOP shares in connection with the issuance of the ESOP Preferred Stock. The unearned ESOP shares are reduced as shares of the ESOP Preferred Stock are committed to be released.

Revenue from Contracts with Cus

Revenue from Contracts with Customers	9 Months Ended
	Sep. 30, 2018
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer [Text Block]	Our revenue includes net interest income on financial instruments and noninterest income. Table 17.1 presents our revenue by operating segment. The Other segment for each of the tables below includes the elimination of certain items that are included in more than one business segment, most of which represents products and services for WIM customers served through Consumer Banking distribution channels. For additional description of our operating segments, including additional financial information and the underlying management accounting process, see Note 21 (Operating Segments) to Financial Statements in this Report. Table 17.1 : Revenue by Operating Segment Quarter ended Sep 30, Community Banking Wholesale Banking Wealth and Investment Management Other Consolidated (in millions) 2018 2017 2018 2017 2018 2017 2018 2017 2018 2017 Net interest income (1) $ 7,338 7,154 4,726 4,763 1,102 1,177 (594 ) (645 ) 12,572 12,449 Noninterest income: Service charges on deposit accounts 700 739 505 538 3 3 (4 ) (4 ) 1,204 1,276 Trust and investment fees: Brokerage advisory, commissions and other fees 470 461 79 65 2,268 2,241 (483 ) (463 ) 2,334 2,304 Trust and investment management 231 225 112 129 727 718 (235 ) (232 ) 835 840 Investment banking (17 ) (13 ) 476 479 3 (1 ) — — 462 465 Total trust and investment fees 684 673 667 673 2,998 2,958 (718 ) (695 ) 3,631 3,609 Card fees 925 909 92 91 1 1 (1 ) (1 ) 1,017 1,000 Other fees: Charges and fees on loans (1) 65 72 233 246 — 1 — (1 ) 298 318 Cash network fees 121 125 — 1 — — — — 121 126 Commercial real estate brokerage commissions — 1 129 119 — — — — 129 120 Letters of credit fees (1) 2 1 70 76 1 1 (1 ) (1 ) 72 77 Wire transfer and other remittance fees 67 60 52 52 2 3 (1 ) (1 ) 120 114 All other fees 89 103 20 19 1 — — — 110 122 Total other fees 344 362 504 513 4 5 (2 ) (3 ) 850 877 Mortgage banking (1) 747 937 101 110 (3 ) (3 ) 1 2 846 1,046 Insurance (1) 21 35 76 225 19 21 (12 ) (12 ) 104 269 Net gains (losses) from trading activities (1) 10 (58 ) 135 157 13 21 — — 158 120 Net gains (losses) on debt securities (1) 1 169 53 (5 ) 3 2 — — 57 166 Net gains from equity securities (1) 274 270 50 40 92 53 — — 416 363 Lease income (1) — — 453 475 — — — — 453 475 Other income of the segment (1) 772 330 (58 ) (76 ) (6 ) 18 (75 ) (73 ) 633 199 Total noninterest income 4,478 4,366 2,578 2,741 3,124 3,079 (811 ) (786 ) 9,369 9,400 Revenue $ 11,816 11,520 7,304 7,504 4,226 4,256 (1,405 ) (1,431 ) 21,941 21,849 Nine months ended Sep 30, Community Banking Wholesale Banking Wealth and Investment Management Other Consolidated 2018 2017 2018 2017 2018 2017 2018 2017 2018 2017 Net interest income (1) $ 21,879 21,419 13,951 14,253 3,325 3,489 (1,804 ) (1,917 ) 37,351 37,244 Noninterest income: Service charges on deposit accounts 1,971 2,206 1,569 1,658 12 13 (12 ) (12 ) 3,540 3,865 Trust and investment fees: Brokerage advisory, commissions and other fees 1,413 1,357 224 231 6,896 6,741 (1,442 ) (1,372 ) 7,091 6,957 Trust and investment management 684 658 335 390 2,201 2,137 (700 ) (679 ) 2,520 2,506 Investment banking (27 ) (60 ) 1,401 1,407 4 (2 ) — — 1,378 1,345 Total trust and investment fees 2,070 1,955 1,960 2,028 9,101 8,876 (2,142 ) (2,051 ) 10,989 10,808 Card fees 2,650 2,703 275 260 4 4 (3 ) (3 ) 2,926 2,964 Other fees: Charges and fees on loans (1) 208 235 695 715 2 3 (2 ) (3 ) 903 950 Cash network fees 364 379 3 7 — — — — 367 386 Commercial real estate brokerage commissions — 1 323 302 — — — — 323 303 Letters of credit fees (1) 4 4 219 223 3 3 (3 ) (3 ) 223 227 Wire transfer and other remittance fees 197 178 157 151 6 7 (3 ) (3 ) 357 333 All other fees 246 355 75 89 2 1 — — 323 445 Total other fees 1,019 1,152 1,472 1,487 13 14 (8 ) (9 ) 2,496 2,644 Mortgage banking (1) 2,284 3,081 269 343 (8 ) (7 ) 5 5 2,550 3,422 Insurance (1) 65 104 233 695 55 63 (33 ) (36 ) 320 826 Net gains (losses) from trading activities (1) 33 (143 ) 514 615 45 71 — — 592 543 Net gains (losses) on debt securities (1) (1 ) 455 96 (135 ) 4 2 — — 99 322 Net gains from equity securities (1) 1,367 960 232 92 (105 ) 155 — — 1,494 1,207 Lease income (1) — — 1,351 1,449 — — — — 1,351 1,449 Other income of the segment (1) 2,115 1,406 (142 ) (185 ) (27 ) 59 (226 ) (235 ) 1,720 1,045 Total noninterest income 13,573 13,879 7,829 8,307 9,094 9,250 (2,419 ) (2,341 ) 28,077 29,095 Revenue $ 35,452 35,298 21,780 22,560 12,419 12,739 (4,223 ) (4,258 ) 65,428 66,339 (1) These revenues are not within the scope of ASU 2014-09 – Revenue from Contracts with Customers , and additional details are included in other footnotes to our financial statements. The scope explicitly excludes net interest income as well as many other revenues for financial assets and liabilities, including loans, leases, securities, and derivatives. Following is a discussion of key revenues within the scope of ASU 2014-09 – Revenue from Contracts with Customers (“the new revenue guidance”). We provide services to customers which have related performance obligations that we complete to recognize revenue. Our revenues are generally recognized either immediately upon the completion of our service or over time as we perform services. Any services performed over time generally require that we render services each period and therefore we measure our progress in completing these services based upon the passage of time. SERVICE CHARGES ON DEPOSIT ACCOUNTS are earned on depository accounts for commercial and consumer customers and include fees for account and overdraft services. Account charges include fees for periodic account maintenance activities and event-driven services such as stop payment fees. Our obligation for event-driven services is satisfied at the time of the event when the service is delivered, while our obligation for maintenance services is satisfied over the course of each month. Our obligation for overdraft services is satisfied at the time of the overdraft. Table 17.2 presents our service charges on deposit accounts by operating segment. Table 17.2 : Service Charges on Deposit Accounts by Operating Segment Quarter ended Sep 30, Community Banking Wholesale Banking Wealth and Investment Management Other Consolidated (in millions) 2018 2017 2018 2017 2018 2017 2018 2017 2018 2017 Overdraft fees $ 484 503 1 2 — — — — 485 505 Account charges 216 236 504 536 3 3 (4 ) (4 ) 719 771 Service charges on deposit accounts $ 700 739 505 538 3 3 (4 ) (4 ) 1,204 1,276 Nine months ended Sep 30, Community Banking Wholesale Banking Wealth and Investment Management Other Consolidated (in millions) 2018 2017 2018 2017 2018 2017 2018 2017 2018 2017 Overdraft fees $ 1,312 1,471 4 5 1 1 — — 1,317 1,477 Account charges 659 735 1,565 1,653 11 12 (12 ) (12 ) 2,223 2,388 Service charges on deposit accounts $ 1,971 2,206 1,569 1,658 12 13 (12 ) (12 ) 3,540 3,865 BROKERAGE ADVISORY, COMMISSIONS AND OTHER FEES are earned for providing full-service and discount brokerage services predominantly to retail brokerage clients. These revenues include fees earned on asset-based and transactional accounts and other brokerage advisory services. Asset-based revenues are charged based on the market value of the client’s assets. The services and related obligations associated with certain of these revenues, which include investment advice, active management of client assets, or assistance with selecting and engaging a third-party advisory manager, are generally satisfied over a month or quarter. The remaining revenues include trailing commissions which are earned for selling shares to investors. Our obligation associated with earning trailing commissions is satisfied at the time shares are sold. However, these fees are received and recognized over time during the period the customer owns the shares and we remain the broker of record. The amount of trailing commissions is variable based on the length of time the customer holds the shares and on changes in the value of the underlying assets. Transactional revenues are earned for executing transactions at the client’s direction. Our obligation is generally satisfied upon the execution of the transaction and the fees are based on the size and number of transactions executed. Other revenues earned from other brokerage advisory services include omnibus and networking fees received from mutual fund companies in return for providing record keeping and other administrative services, and annual account maintenance fees charged to customers. Table 17.3 presents our brokerage advisory, commissions and other fees by operating segment. Table 17.3 : Brokerage Advisory, Commissions and Other Fees by Operating Segment Quarter ended Sep 30, Community Banking Wholesale Banking Wealth and Investment Management Other Consolidated (in millions) 2018 2017 2018 2017 2018 2017 2018 2017 2018 2017 Asset-based revenue (1) $ 371 347 1 — 1,720 1,669 (372 ) (347 ) 1,720 1,669 Transactional revenue 82 93 19 9 388 421 (94 ) (95 ) 395 428 Other revenue 17 21 59 56 160 151 (17 ) (21 ) 219 207 Brokerage advisory, commissions and other fees $ 470 461 79 65 2,268 2,241 (483 ) (463 ) 2,334 2,304 Nine months ended Sep 30, Community Banking Wholesale Banking Wealth and Investment Management Other Consolidated (in millions) 2018 2017 2018 2017 2018 2017 2018 2017 2018 2017 Asset-based revenue (1) $ 1,107 1,013 1 — 5,185 4,910 (1,108 ) (1,012 ) 5,185 4,911 Transactional revenue 258 287 47 33 1,227 1,356 (286 ) (303 ) 1,246 1,373 Other revenue 48 57 176 198 484 475 (48 ) (57 ) 660 673 Brokerage advisory, commissions and other fees $ 1,413 1,357 224 231 6,896 6,741 (1,442 ) (1,372 ) 7,091 6,957 (1) We earned trailing commissions of $323 million and $975 million in the third quarter and first nine months of 2018, respectively, and $337 million and $1.0 billion for the third quarter and nine months of 2017, respectively. TRUST AND INVESTMENT MANAGEMENT FEES are earned for providing trust, investment management and other related services. Investment management services include managing and administering assets, including mutual funds, and institutional separate accounts. Fees for these services are generally determined based on a tiered scale relative to the market value of assets under management (AUM). In addition to AUM we have client assets under administration (AUA) that earn various administrative fees which are generally based on the extent of the services provided to administer the account. Services with AUM and AUA-based fees are generally performed over time. Trust services include acting as a trustee or agent for corporate trust, personal trust, and agency assets. Obligations for trust services are generally satisfied over time, while obligations for activities that are transactional in nature are satisfied at the time of the transaction. Other related services include the custody and safekeeping of accounts. Our obligation for these services is generally satisfied over time. Table 17.4 presents our trust and investment management fees by operating segment. Table 17.4 : Trust and Investment Management Fees by Operating Segment Quarter ended Sep 30, Community Banking Wholesale Banking Wealth and Investment Management Other Consolidated (in millions) 2018 2017 2018 2017 2018 2017 2018 2017 2018 2017 Investment management fees $ — — — — 520 508 — — 520 508 Trust fees 229 224 82 104 181 189 (235 ) (231 ) 257 286 Other revenue 2 1 30 25 26 21 — (1 ) 58 46 Trust and investment management fees $ 231 225 112 129 727 718 (235 ) (232 ) 835 840 Nine months ended Sep 30, Community Banking Wholesale Banking Wealth and Investment Management Other Consolidated (in millions) 2018 2017 2018 2017 2018 2017 2018 2017 2018 2017 Investment management fees $ — 2 — — 1,585 1,525 — — 1,585 1,527 Trust fees 682 655 250 315 554 566 (700 ) (678 ) 786 858 Other revenue 2 1 85 75 62 46 — (1 ) 149 121 Trust and investment management fees $ 684 658 335 390 2,201 2,137 (700 ) (679 ) 2,520 2,506 INVESTMENT BANKING FEES are earned for underwriting debt and equity securities, arranging loan syndications and performing other advisory services. Our obligation for these services is generally satisfied at closing of the transaction. CARD FEES include credit and debit card interchange and network revenues and various card-related fees. Card-related fees such as late fees, cash advance fees, and balance transfer fees are loan-related and excluded from the scope of the new revenue guidance. Credit and debit card interchange and network revenues are earned on credit and debit card transactions conducted through payment networks such as Visa, MasterCard, and American Express. Our obligation is satisfied concurrently with the delivery of services on a daily basis . Table 17.5 presents our card fees by operating segment. Table 17.5 : Card Fees by Operating Segment Quarter ended Sep 30, Community Banking Wholesale Banking Wealth and Investment Management Other Consolidated (in millions) 2018 2017 2018 2017 2018 2017 2018 2017 2018 2017 Credit card interchange and network revenues (1) $ 218 230 92 91 1 1 (1 ) (1 ) 310 321 Debit card interchange and network revenues 523 496 — — — — — — 523 496 Late fees, cash advance fees, balance transfer fees, and annual fees 184 183 — — — — — — 184 183 Card fees (1) $ 925 909 92 91 1 1 (1 ) (1 ) 1,017 1,000 Nine months ended Sep 30, Community Banking Wholesale Banking Wealth and Investment Management Other Consolidated (in millions) 2018 2017 2018 2017 2018 2017 2018 2017 2018 2017 Credit card interchange and network revenues (1) $ 600 703 275 260 4 4 (3 ) (3 ) 876 964 Debit card interchange and network revenues 1,527 1,459 — — — — — — 1,527 1,459 Late fees, cash advance fees, balance transfer fees, and annual fees 523 541 — — — — — — 523 541 Card fees (1) $ 2,650 2,703 275 260 4 4 (3 ) (3 ) 2,926 2,964 (1) The cost of credit card rewards and rebates of $335 million and $1,013 million for the quarter and nine months ended September 30, 2018, respectively, and $310 million and $873 million for the quarter and nine months ended September 30, 2017, respectively, are presented net against the related revenues. CASH NETWORK FEES are earned for processing ATM transactions. Our obligation is completed daily upon settlement of ATM transactions. COMMERCIAL REAL ESTATE BROKERAGE COMMISSIONS are earned for assisting customers in the sale of real estate property. Our obligation is satisfied upon the successful brokering of a transaction. Fees are based on a fixed percentage of the sales price. WIRE TRANSFER AND OTHER REMITTANCE FEES consist of fees earned for funds transfer services and issuing cashier’s checks and money orders. Our obligation is satisfied at the time of the funds transfer services or upon issuance of the cashier’s check or money order. ALL OTHER FEES include various types of fees earned on services to customers which have related performance obligations that we complete to recognize revenue. A significant portion of the revenue is earned from providing business payroll services and merchant services, which are generally recognized over time as we perform the services.

Employee Benefits

Employee Benefits	9 Months Ended
	Sep. 30, 2018
Defined Benefit Plan [Abstract]
Employee Benefits	Note 18: Employee Benefits We sponsor a frozen noncontributory qualified defined benefit retirement plan, the Wells Fargo & Company Cash Balance Plan (Cash Balance Plan), which covers eligible employees of Wells Fargo. The Cash Balance Plan was frozen on July 1, 2009, and no new benefits accrue after that date. Table 18.1 presents the components of net periodic benefit cost. Table 18.1: Net Periodic Benefit Cost 2018 2017 Pension benefits Pension benefits (in millions) Qualified Non-qualified Other benefits Qualified Non-qualified Other benefits Quarter ended September 30, Service cost $ 2 — — 1 — — Interest cost (1) 97 5 6 103 5 7 Expected return on plan assets (1) (160 ) — (8 ) (163 ) — (7 ) Amortization of net actuarial loss (gain) (1) 32 4 (4 ) 37 3 (3 ) Amortization of prior service credit (1) — — (3 ) — — (2 ) Settlement loss (1) — — — 6 — — Net periodic benefit cost (income) $ (29 ) 9 (9 ) (16 ) 8 (5 ) Nine months ended September 30, Service cost $ 5 — — 4 — — Interest cost (1) 293 16 16 309 17 21 Expected return on plan assets (1) (481 ) — (23 ) (489 ) — (22 ) Amortization of net actuarial loss (gain) (1) 98 10 (13 ) 113 9 (8 ) Amortization of prior service credit (1) — — (8 ) — — (7 ) Settlement loss (1) — 3 — 7 6 — Net periodic benefit cost (income) $ (85 ) 29 (28 ) (56 ) 32 (16 ) (1) Effective January 1, 2018, we adopted ASU 2017-07 – Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost . Accordingly, 2018 balances are reported in other noninterest expense on the consolidated statement of income. For 2017, these balances were reported in employee benefits.

Earnings Per Common Share

Earnings Per Common Share	9 Months Ended
	Sep. 30, 2018
Earnings Per Share [Abstract]
Earnings Per Common Share	Note 19: Earnings and Dividends Per Common Share Table 19.1 shows earnings per common share and diluted earnings per common share and reconciles the numerator and denominator of both earnings per common share calculations. Table 19.1: Earnings Per Common Share Calculations Quarter ended September 30, Nine months ended September 30, (in millions, except per share amounts) 2018 2017 2018 2017 Wells Fargo net income (1) $ 6,007 4,542 $ 16,329 16,032 Less: Preferred stock dividends and other (2) 554 411 1,351 1,218 Wells Fargo net income applicable to common stock (numerator) (1) $ 5,453 4,131 $ 14,978 14,814 Earnings per common share Average common shares outstanding (denominator) 4,784.0 4,948.6 4,844.8 4,982.1 Per share (1) $ 1.14 0.83 $ 3.09 2.97 Diluted earnings per common share Average common shares outstanding 4,784.0 4,948.6 4,844.8 4,982.1 Add: Stock options 7.5 15.8 8.5 18.1 Restricted share rights 26.5 22.4 25.9 24.1 Warrants 5.2 10.0 5.8 11.1 Diluted average common shares outstanding (denominator) 4,823.2 4,996.8 4,885.0 5,035.4 Per share (1) $ 1.13 0.83 $ 3.07 2.94 (1) Financial information for the prior period has been revised to reflect the impact of the adoption of ASU 2017-12 – Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities, effective January 1, 2017. (2) The quarter and nine months ended September 30, 2018 , includes $155 million as a result of eliminating the discount on our Series J Preferred Stock, which was redeemed on September 17, 2018. Table 19.2 presents the outstanding options to purchase shares of common stock that were anti-dilutive (the exercise price was higher than the weighted-average market price), and therefore not included in the calculation of diluted earnings per common share. Table 19.2: Outstanding Anti-Dilutive Options Weighted-average shares Quarter ended September 30, Nine months ended September 30, (in millions) 2018 2017 2018 2017 Options — 1.8 0.4 2.0 Table 19.3 presents dividends declared per common share. Table 19.3: Dividends Declared Per Common Share Quarter ended September 30, Nine months ended September 30, 2018 2017 2018 2017 Per common share $ 0.430 0.390 1.210 1.150

Other Comprehensive Income

Other Comprehensive Income	9 Months Ended
	Sep. 30, 2018
Cumulative Other Comprehensive Income Balances [Abstract]
Other Comprehensive Income	Note 20: Other Comprehensive Income Table 20.1 provides the components of other comprehensive income (OCI), reclassifications to net income by income statement line item, and the related tax effects. Table 20.1: Summary of Other Comprehensive Income Quarter ended September 30, Nine months ended September 30, 2018 2017 2018 2017 (in millions) Before tax Tax effect Net of tax Before tax Tax effect Net of tax Before tax Tax effect Net of tax Before tax Tax effect Net of tax Debt securities (1): Net unrealized gains (losses) arising during the period $ (1,468 ) 360 (1,108 ) 891 (353 ) 538 (5,528 ) 1,360 (4,168 ) 2,825 (1,075 ) 1,750 Reclassification of net (gains) losses to net income: Interest income on debt securities (2) 109 (27 ) 82 70 (26 ) 44 268 (66 ) 202 122 (46 ) 76 Net gains on debt securities (57 ) 15 (42 ) (166 ) 62 (104 ) (99 ) 25 (74 ) (322 ) 119 (203 ) Net gains from equity securities (3) — — — (106 ) 41 (65 ) — — — (323 ) 120 (203 ) Other noninterest income (1 ) — (1 ) 2 — 2 (1 ) — (1 ) 1 — 1 Subtotal reclassifications to net income 51 (12 ) 39 (200 ) 77 (123 ) 168 (41 ) 127 (522 ) 193 (329 ) Net change (1,417 ) 348 (1,069 ) 691 (276 ) 415 (5,360 ) 1,319 (4,041 ) 2,303 (882 ) 1,421 Derivatives and hedging activities: Fair Value Hedges: Change in fair value of excluded components on fair value hedges (4) (21 ) 5 (16 ) 72 (26 ) 46 (147 ) 36 (111 ) (254 ) 96 (158 ) Cash Flow Hedges: Net unrealized gains (losses) arising during the period on cash flow hedges (3 ) — (3 ) 32 (12 ) 20 (269 ) 66 (203 ) 272 (103 ) 169 Reclassification of net (gains) losses to net income on cash flow hedges: Interest income on loans 78 (19 ) 59 (107 ) 42 (65 ) 215 (53 ) 162 (468 ) 178 (290 ) Interest expense on long-term debt 1 — 1 2 (1 ) 1 1 — 1 8 (3 ) 5 Subtotal reclassifications to net income 79 (19 ) 60 (105 ) 41 (64 ) 216 (53 ) 163 (460 ) 175 (285 ) Net change 55 (14 ) 41 (1 ) 3 2 (200 ) 49 (151 ) (442 ) 168 (274 ) Defined benefit plans adjustments: Net actuarial and prior service gains arising during the period — — — 11 (5 ) 6 6 (2 ) 4 4 (2 ) 2 Reclassification of amounts to net periodic benefit costs (5): Amortization of net actuarial loss 32 (8 ) 24 37 (13 ) 24 95 (23 ) 72 114 (43 ) 71 Settlements and other (3 ) 2 (1 ) 4 (1 ) 3 (5 ) 3 (2 ) 6 — 6 Subtotal reclassifications to net periodic benefit costs 29 (6 ) 23 41 (14 ) 27 90 (20 ) 70 120 (43 ) 77 Net change 29 (6 ) 23 52 (19 ) 33 96 (22 ) 74 124 (45 ) 79 Foreign currency translation adjustments: Net unrealized gains (losses) arising during the period (9 ) 2 (7 ) 39 3 42 (94 ) — (94 ) 86 6 92 Net change (9 ) 2 (7 ) 39 3 42 (94 ) — (94 ) 86 6 92 Other comprehensive income (loss) $ (1,342 ) 330 (1,012 ) 781 (289 ) 492 (5,558 ) 1,346 (4,212 ) 2,071 (753 ) 1,318 Less: Other comprehensive loss from noncontrolling interests, net of tax — (34 ) (1 ) (29 ) Wells Fargo other comprehensive income (loss), net of tax $ (1,012 ) 526 (4,211 ) 1,347 (1) The quarter and nine months ended ended September 30, 2017 includes net unrealized gains (losses) arising during the period from equity securities of $(13) million and $113 million and reclassification of net (gains) losses to net income related to equity securities of $(106) million and $(323) million , respectively. With the adoption in first quarter 2018 of ASU 2016-01, the quarter and nine months ended September 30, 2018 reflects net unrealized gains (losses) arising during the period and reclassification of net (gains) losses to net income from only debt securities. (2) Represents net unrealized gains and losses amortized over the remaining lives of securities that were transferred from the available-for-sale portfolio to the held-to-maturity portfolio. (3) Net gains from equity securities is presented for table presentation purposes. After adoption of ASU 2016-01 on January 1, 2018, this line does not contain balances as realized and unrealized gains and losses on marketable equity securities are recorded in earnings. (4) Represents changes in fair value of cross-currency swaps attributable to changes in cross-currency basis spreads, which are excluded from the assessment of effectiveness recorded in other comprehensive income. (5) These items are included in the computation of net periodic benefit cost, which is recorded in employee benefits expense (see Note 18 (Employee Benefits) for additional details). Table 20.2: Cumulative OCI Balances (in millions) Debt securities (1) Derivatives and hedging activities Defined benefit plans adjustments Foreign currency translation adjustments Cumulative other compre- hensive income Quarter ended September 30, 2018 Balance, beginning of period $ (2,919 ) (610 ) (1,757 ) (175 ) (5,461 ) Reclassification of certain tax effects to retained earnings (2) 31 (87 ) (353 ) 9 (400 ) Net unrealized losses arising during the period (1,108 ) (19 ) — (7 ) (1,134 ) Amounts reclassified from accumulated other comprehensive income 39 60 23 — 122 Net change (1,038 ) (46 ) (330 ) 2 (1,412 ) Balance, end of period $ (3,957 ) (656 ) (2,087 ) (173 ) (6,873 ) Quarter ended September 30, 2017 Balance, beginning of period $ (96 ) (19 ) (1,897 ) (136 ) (2,148 ) Net unrealized gains arising during the period 538 66 6 42 652 Amounts reclassified from accumulated other comprehensive income (123 ) (64 ) 27 — (160 ) Net change 415 2 33 42 492 Less: Other comprehensive loss from noncontrolling interests (34 ) — — — (34 ) Balance, end of period $ 353 (17 ) (1,864 ) (94 ) (1,622 ) Nine months ended September 30, 2018 Balance, beginning of period $ 171 (418 ) (1,808 ) (89 ) (2,144 ) Transition adjustment (3) (118 ) — — — (118 ) Balance, January 1, 2018 53 (418 ) (1,808 ) (89 ) (2,262 ) Reclassification of certain tax effects to retained earnings (2) 31 (87 ) (353 ) 9 (400 ) Net unrealized gains (losses) arising during the period (4,168 ) (314 ) 4 (94 ) (4,572 ) Amounts reclassified from accumulated other comprehensive income 127 163 70 — 360 Net change (4,010 ) (238 ) (279 ) (85 ) (4,612 ) Less: Other comprehensive loss from noncontrolling interests — — — (1 ) (1 ) Balance, end of period $ (3,957 ) (656 ) (2,087 ) (173 ) (6,873 ) Nine months ended September 30, 2017 Balance, beginning of period $ (1,099 ) 89 (1,943 ) (184 ) (3,137 ) Transition adjustment (4) — 168 — — 168 Balance, January 1, 2017 (1,099 ) 257 (1,943 ) (184 ) (2,969 ) Net unrealized gains arising during the period 1,750 11 2 92 1,855 Amounts reclassified from accumulated other comprehensive income (329 ) (285 ) 77 — (537 ) Net change 1,421 (274 ) 79 92 1,318 Less: Other comprehensive income (loss) from noncontrolling interests (31 ) — — 2 (29 ) Balance, end of period $ 353 (17 ) (1,864 ) (94 ) (1,622 ) (1) The quarter and nine months ended ended September 30, 2017 includes net unrealized gains (losses) arising during the period from equity securities of $(13) million and $113 million and reclassification of net (gains) losses to net income related to equity securities of $(106) million and $(323) million , respectively. With the adoption in first quarter 2018 of ASU 2016-01, the quarter and nine months ended September 30, 2018 reflects net unrealized gains (losses) arising during the period and reclassification of net (gains) losses to net income from only debt securities. (2) Represents the reclassification from other comprehensive income to retained earnings as a result of the adoption of ASU 2018-02 – Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income, in the third quarter of 2018. For additional information, see Note 1. (3) The transition adjustment relates to the adoption of ASU 2016-01 – Financial Instruments – Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities . See Note 1 (Summary of Significant Accounting Policies) for more information. (4) The transition adjustment relates to the adoption of ASU 2017-12, Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities .

Operating Segments

Operating Segments	9 Months Ended
	Sep. 30, 2018
Segment Reporting [Abstract]
Operating Segments	Note 21: Operating Segments We have three reportable operating segments: Community Banking; Wholesale Banking; and Wealth and Investment Management (WIM). We define our operating segments by product type and customer segment and their results are based on our management accounting process, for which there is no comprehensive, authoritative guidance equivalent to GAAP for financial accounting. The management accounting process measures the performance of the operating segments based on our management structure and is not necessarily comparable with similar information for other financial services companies. If the management structure and/or the allocation process changes, allocations, transfers and assignments may change. Effective first quarter 2018, assets and liabilities receive a funding charge or credit that considers interest rate risk, liquidity risk, and other product characteristics on a more granular level. This methodology change affects results across all three of our reportable operating segments and prior period operating segment results have been revised to reflect this methodology change. Our previously reported consolidated financial results were not impacted by the methodology change; however, in connection with the adoption of ASU 2016-01 in first quarter 2018, certain reclassifications have occurred within noninterest income. For a description of our operating segments see Note 25 (Operating Segments) to Financial Statements in our 2017 Form 10-K. Table 21.1 presents our results by operating segment. Table 21.1: Operating Segments Community Wholesale Banking Wealth and Investment Management Other (1) Consolidated Company (income/expense in millions, average balances in billions) 2018 2017 2018 2017 2018 2017 2018 2017 2018 2017 Quarter ended Net interest income (2) $ 7,338 7,154 4,726 4,763 1,102 1,177 (594 ) (645 ) 12,572 12,449 Provision (reversal of provision) for credit losses 547 650 26 69 6 (1 ) 1 (1 ) 580 717 Noninterest income 4,478 4,366 2,578 2,741 3,124 3,079 (811 ) (786 ) 9,369 9,400 Noninterest expense 7,467 7,852 3,935 4,234 3,243 3,102 (882 ) (837 ) 13,763 14,351 Income (loss) before income tax expense (benefit) 3,802 3,018 3,343 3,201 977 1,155 (524 ) (593 ) 7,598 6,781 Income tax expense (benefit) 925 1,079 475 894 244 433 (132 ) (225 ) 1,512 2,181 Net income (loss) before noncontrolling interests 2,877 1,939 2,868 2,307 733 722 (392 ) (368 ) 6,086 4,600 Less: Net income (loss) from noncontrolling interests 61 62 17 (7 ) 1 3 — — 79 58 Net income (loss) (3) $ 2,816 1,877 2,851 2,314 732 719 (392 ) (368 ) 6,007 4,542 Average loans $ 460.9 473.7 462.8 463.7 74.6 72.4 (58.8 ) (57.5 ) 939.5 952.3 Average assets 1,024.9 1,089.6 827.2 824.2 83.8 83.2 (59.6 ) (58.5 ) 1,876.3 1,938.5 Average deposits 760.9 734.6 413.6 463.4 159.8 184.4 (67.9 ) (76.0 ) 1,266.4 1,306.4 Nine months ended Sep 30, Net interest income (2) $ 21,879 21,419 13,951 14,253 3,325 3,489 (1,804 ) (1,917 ) 37,351 37,244 Provision (reversal of provision) for credit losses 1,249 1,919 (30 ) (39 ) (2 ) 2 6 (5 ) 1,223 1,877 Noninterest income 13,573 13,879 7,829 8,307 9,094 9,250 (2,419 ) (2,341 ) 28,077 29,095 Noninterest expense 23,459 22,399 12,132 12,437 9,894 9,377 (2,698 ) (2,529 ) 42,787 41,684 Income (loss) before income tax expense (benefit) 10,744 10,980 9,678 10,162 2,527 3,360 (1,531 ) (1,724 ) 21,418 22,778 Income tax expense (benefit) 3,147 3,316 1,302 2,642 630 1,255 (383 ) (654 ) 4,696 6,559 Net income (loss) before noncontrolling interests 7,597 7,664 8,376 7,520 1,897 2,105 (1,148 ) (1,070 ) 16,722 16,219 Less: Net income (loss) from noncontrolling interests 372 198 15 (21 ) 6 10 — — 393 187 Net income (loss) (3) $ 7,225 7,466 8,361 7,541 1,891 2,095 (1,148 ) (1,070 ) 16,329 16,032 Average loans $ 465.0 476.5 464.2 466.3 74.4 71.6 (58.8 ) (56.8 ) 944.8 957.6 Average assets 1,040.2 1,089.6 827.6 817.9 84.0 82.5 (59.6 ) (57.8 ) 1,892.2 1,932.2 Average deposits 756.4 726.8 424.4 463.7 168.2 190.6 (70.8 ) (78.8 ) 1,278.2 1,302.3 (1) Includes the elimination of certain items that are included in more than one business segment, most of which represents products and services for Wealth and Investment Management customers served through Community Banking distribution channels. (2) Net interest income is the difference between interest earned on assets and the cost of liabilities to fund those assets. Interest earned includes actual interest earned on segment assets as well as interest credits for any funding of a segment available to be provided to other segments. The cost of liabilities includes actual interest expense on segment liabilities as well as funding charges for any funding provided from other segments. (3) Represents segment net income (loss) for Community Banking; Wholesale Banking; and Wealth and Investment Management segments and Wells Fargo net income for the consolidated company.

Regulatory and Agency Capital R

Regulatory and Agency Capital Requirements	9 Months Ended
	Sep. 30, 2018
Banking and Thrift [Abstract]
Regulatory and Agency Capital Requirements	Note 22: Regulatory and Agency Capital Requirements The Company and each of its subsidiary banks are subject to regulatory capital adequacy requirements promulgated by federal bank regulatory agencies. The Federal Reserve establishes capital requirements for the consolidated financial holding company, and the OCC has similar requirements for the Company’s national banks, including Wells Fargo Bank, N.A. (the Bank). Table 22.1 presents regulatory capital information for Wells Fargo & Company and the Bank using Basel III, which increased minimum required capital ratios, and introduced a minimum Common Equity Tier 1 (CET1) ratio. We must report the lower of our CET1, tier 1 and total capital ratios calculated under the Standardized Approach and under the Advanced Approach in the assessment of our capital adequacy. The Standardized Approach applies assigned risk weights to broad risk categories, while the calculation of risk-weighted assets (RWAs) under the Advanced Approach differs by requiring applicable banks to utilize a risk-sensitive methodology, which relies upon the use of internal credit models, and includes an operational risk component. The Basel III capital rules are being phased-in effective January 1, 2014, through the end of 2021. Beginning January 1, 2018, the requirements for calculating CET1 and tier 1 capital, along with RWAs, became fully phased-in. Accordingly, the information presented reflects fully phased-in CET1 capital, tier 1 capital, and RWAs, but reflects total capital still in accordance with Transition Requirements . The Bank is an approved seller/servicer of mortgage loans and is required to maintain minimum levels of shareholders’ equity, as specified by various agencies, including the United States Department of Housing and Urban Development, GNMA, FHLMC and FNMA. At September 30, 2018 , the Bank met these requirements. Other subsidiaries, including the Company’s insurance and broker-dealer subsidiaries, are also subject to various minimum capital levels, as defined by applicable industry regulations. The minimum capital levels for these subsidiaries, and related restrictions, are not significant to our consolidated operations. Table 22.1: Regulatory Capital Information Wells Fargo & Company Wells Fargo Bank, N.A. September 30, 2018 December 31, 2017 September 30, 2018 December 31, 2017 (in millions, except ratios) Advanced Approach Standardized Approach Advanced Approach Standardized Advanced Approach Standardized Advanced Approach Standardized Regulatory capital: Common equity tier 1 $ 148,855 148,855 154,765 154,765 141,459 141,459 143,292 143,292 Tier 1 170,342 170,342 178,209 178,209 141,459 141,459 143,292 143,292 Total 201,616 209,924 210,333 220,097 154,468 162,353 156,661 165,734 Assets: Risk-weighted $ 1,189,464 1,250,215 1,199,545 1,260,663 1,082,515 1,162,179 1,090,360 1,169,863 Adjusted average (1) 1,847,338 1,847,338 1,905,568 1,905,568 1,647,541 1,647,541 1,708,828 1,708,828 Regulatory capital ratios: Common equity tier 1 capital 12.51 % 11.91 * 12.90 12.28 * 13.07 12.17 * 13.14 12.25 * Tier 1 capital 14.32 13.63 * 14.86 14.14 * 13.07 12.17 * 13.14 12.25 * Total capital 16.95 16.79 * 17.53 17.46 * 14.27 13.97 * 14.37 14.17 * Tier 1 leverage (1) 9.22 9.22 9.35 9.35 8.59 8.59 8.39 8.39 *Denotes the lowest capital ratio as determined under the Advanced and Standardized Approaches. (1) The leverage ratio consists of Tier 1 capital divided by quarterly average total assets, excluding goodwill and certain other items. Table 22.2 presents the minimum required regulatory capital ratios under Transition Requirements to which the Company and the Bank were subject as of September 30, 2018 and December 31, 2017 . Table 22.2: Minimum Required Regulatory Capital Ratios – Transition Requirements (1) Wells Fargo & Company Wells Fargo Bank, N.A. September 30, 2018 December 31, 2017 September 30, 2018 December 31, 2017 Regulatory capital ratios: Common equity tier 1 capital 7.875 % 6.750 6.375 5.750 Tier 1 capital 9.375 8.250 7.875 7.250 Total capital 11.375 10.250 9.875 9.250 Tier 1 leverage 4.000 4.000 4.000 4.000 (1) At September 30, 2018 , under transition requirements, the CET1, tier 1 and total capital minimum ratio requirements for Wells Fargo & Company include a capital conservation buffer of 1.875% and a global systemically important bank (G-SIB) surcharge of 1.500% . Only the 1.875% capital conservation buffer applies to the Bank at September 30, 2018 .

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2018
Significant Accounting Policies [Line Items]
Nature of Operations	Wells Fargo & Company is a diversified financial services company. We provide banking, trust and investments, mortgage banking, investment banking, retail banking, brokerage, and consumer and commercial finance through banking locations, the internet and other distribution channels to consumers, businesses and institutions in all 50 states, the District of Columbia, and in foreign countries. When we refer to “Wells Fargo,” “the Company,” “we,” “our” or “us,” we mean Wells Fargo & Company and Subsidiaries (consolidated). Wells Fargo & Company (the Parent) is a financial holding company and a bank holding company. We also hold a majority interest in a real estate investment trust, which has publicly traded preferred stock outstanding.
Use of Estimates	Our accounting and reporting policies conform with U.S. generally accepted accounting principles (GAAP) and practices in the financial services industry. For discussion of our significant accounting policies, see Note 1 (Summary of Significant Accounting Policies) in our Annual Report on Form 10-K for the year ended December 31, 2017 ( 2017 Form 10-K). To prepare the financial statements in conformity with GAAP, management must make estimates based on assumptions about future economic and market conditions (for example, unemployment, market liquidity, real estate prices, etc.) that affect the reported amounts of assets and liabilities at the date of the financial statements, income and expenses during the reporting period and the related disclosures. Although our estimates contemplate current conditions and how we expect them to change in the future, it is reasonably possible that actual conditions could be worse than anticipated in those estimates, which could materially affect our results of operations and financial condition. Management has made significant estimates in several areas, including: • allowance for credit losses (Note 6 (Loans and Allowance for Credit Losses)); • valuations of residential mortgage servicing rights (MSRs) (Note 9 (Securitizations and Variable Interest Entities) and Note 10 (Mortgage Banking Activities)) and financial instruments (Note 15 (Fair Values of Assets and Liabilities)); • liabilities for contingent litigation losses (Note 13 (Legal Actions)); and • income taxes. Actual results could differ from those estimates.
Comparability of Prior Year Financial Data	These unaudited interim financial statements reflect all adjustments that are, in the opinion of management, necessary for a fair statement of the results for the periods presented. These adjustments are of a normal recurring nature, unless otherwise disclosed in this Form 10-Q. The results of operations in the interim financial statements do not necessarily indicate the results that may be expected for the full year. The interim financial information should be read in conjunction with our 2017 Form 10-K.
Accounting Standards Adopted in 2018	ASU 2016-01 changes the accounting for certain equity securities to record at fair value with unrealized gains or losses reflected in earnings, as well as improve the disclosures of equity securities and the fair value of financial instruments. The Update also requires that for purposes of disclosing the fair value of financial instruments recorded at amortized cost, including loans and long-term debt, the valuation methodology is based on an exit price notion. We adopted the Update in first quarter 2018 and recorded a cumulative-effect adjustment as of January 1, 2018, that increased retained earnings by $106 million as a result of a transition adjustment to reclassify $118 million in net unrealized gains from other comprehensive income to retained earnings, partially offset by a transition adjustment to decrease retained earnings by $12 million primarily to adjust the carrying value of our auction rate securities from cost to fair value. No transition adjustment was recorded for investments changed to the measurement alternative (described below), which was applied prospectively. As a result of adopting this ASU, our investments in marketable equity securities, including those previously classified as available-for-sale, are accounted for at fair value with unrealized gains or losses reflected in earnings. Additionally, our share of unrealized gains or losses related to marketable equity securities held by our equity method investees are reflected in earnings. Prior to adoption, such unrealized gains and losses were reflected in other comprehensive income. Our investments in nonmarketable equity securities previously accounted for under the cost method of accounting, except for federal bank stock, are now accounted for either at fair value with unrealized gains and losses reflected in earnings or using the measurement alternative. The measurement alternative is similar to the cost method of accounting, except the carrying value is adjusted through earnings for impairment, if any, and changes in observable and orderly transactions in the same or similar investment. We account for substantially all of our private equity securities, previously using the cost method of accounting, now under the measurement alternative. Our auction rate securities portfolio is now accounted for at fair value with unrealized gains or losses reflected in earnings. In connection with our adoption of this Update, we have modified our balance sheet and income statement presentation to report marketable and nonmarketable equity securities and their results separately from debt securities by now reporting all equity securities in a new line labeled “Equity securities” in both the balance sheet and income statement. Additionally we now report loans held for trading purposes in loans held for sale and have reclassified net gains and losses on marketable equity securities used as economic hedges of deferred compensation obligations from “Net gains for trading activities” to “Net gains from equity securities”. All prior periods have been revised to conform to these changes in reporting. Table 1.1 provides a summary of our reporting changes implemented in connection with our adoption of ASU 2016-01 in first quarter 2018. Table 1.1: Summary of Reporting Changes Financial instrument or transaction type As previously reported Revised reporting Balance Sheet Marketable equity securities Trading assets and available for sale investment securities Equity securities (new caption) Nonmarketable equity securities Other assets Equity securities (new caption) Loans held for trading Trading assets Loans held for sale Debt securities held for trading Trading assets Debt securities (formerly “Investment securities”) Income Statement Interest income: Marketable equity securities Trading assets and investment securities Equity securities (new caption) Nonmarketable equity securities Other Equity securities (new caption) Loans held for trading Trading assets Loans held for sale Debt securities held for trading Trading assets Debt securities (formerly “Investment securities”) Noninterest income: Deferred compensation gains (1) Net gains from trading activities Net gains from equity securities (1) Reclassification of net gains and losses on marketable equity securities economically hedging our deferred compensation obligations. Table 1.2 summarizes financial assets and liabilities by form and measurement accounting model. Table 1.2: Accounting Model for Financial Assets and Liabilities Balance sheet caption Measurement model(s) Financial statement Note reference Cash and due from banks Cost N/A Interest-earning deposits with banks Cost N/A Federal funds sold and securities purchased under resale agreements Amortized cost N/A Debt securities: Trading FV-NI (1) Note 4: Trading Activities Note 15: Fair Values of Assets and Liabilities Available-for-sale FV-OCI (2) Note 5: Available-for-Sale and Held-to-Maturity Debt Securities Held-to-maturity Amortized cost Note 5: Available-for-Sale and Held-to-Maturity Debt Securities Mortgage loans held for sale FV-NI (1) LOCOM (3) Note 15: Fair Values of Assets and Liabilities Loans held for sale FV-NI (1) Note 15: Fair Values of Assets and Liabilities Loans Amortized cost FV-NI (1) Note 6: Loans and Allowance for Credit Losses Derivative assets and liabilities FV-NI (1) FV-OCI (2) Note 4: Trading Activities Note 15: Fair Values of Assets and Liabilities Equity securities: Marketable FV-NI (1) Note 4: Trading Activities Note 15: Fair Values of Assets and Liabilities Nonmarketable FV-NI (1) Cost method Equity method MA (4) Note 4: Trading Activities Other assets Amortized cost (5) Note 8: Other Assets Deposits Amortized cost N/A Short-term borrowings Amortized cost N/A Long-term debt Amortized cost N/A (1) FV-NI represents the fair value through net income accounting model. (2) FV-OCI represents the fair value through other comprehensive income accounting model. (3) LOCOM represents the lower of cost or fair value accounting model. (4) MA represents the measurement alternative accounting model. (5) Other assets are generally carried at amortized cost, except for bank-owned life insurance which is carried at cash surrender value. In third quarter 2018 , we adopted the following new accounting guidance: • ASU 2018-02 – Income Statement-Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income . Accounting Standards Adopted in 2018 In first quarter 2018 , we adopted the following new accounting guidance: • Accounting Standards Update (ASU or Update) 2017-09 – Compensation – Stock Compensation (Topic 718): Scope of Modification Accounting; • ASU 2017-07 – Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost; • ASU 2017-05 – Other Income – Gains and Losses from the Derecognition of Nonfinancial Assets (Subtopic 610-20): Clarifying the Scope of Asset Derecognition Guidance and Accounting for Partial Sales of Nonfinancial Assets; • ASU 2017-01 – Business Combinations (Topic 805): Clarifying the Definition of a Business; • ASU 2016-18 – Statement of Cash Flows (Topic 230): Restricted Cash; • ASU 2016-16 – Income Taxes (Topic 740): Intra-Entity Transfers of Assets Other Than Inventory; • ASU 2016-15 – Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments; • ASU 2016-04 – Liabilities – Extinguishments of Liabilities (Subtopic 405-20): Recognition of Breakage for Certain Prepaid Stored-Value Products; • ASU 2016-01 – Financial Instruments – Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities; and • ASU 2014-09 – Revenue from Contracts With Customers (Topic 606) and subsequent related Updates.
Private Share Repurchases	Private Share Repurchases From time to time we enter into private forward repurchase transactions with unrelated third parties to complement our open-market common stock repurchase strategies, to allow us to manage our share repurchases in a manner consistent with our capital plans submitted annually under the Comprehensive Capital Analysis and Review (CCAR) and to provide an economic benefit to the Company. Our payments to the counterparties for these contracts are recorded in permanent equity in the quarter paid and are not subject to re-measurement. The classification of the up-front payments as permanent equity assures that we have appropriate repurchase timing consistent with our capital plans, which contemplate a fixed dollar amount available per quarter for share repurchases pursuant to Federal Reserve Board (FRB) supervisory guidance. In return, the counterparty agrees to deliver a variable number of shares based on a per share discount to the volume-weighted average stock price over the contract period. There are no scenarios where the contracts would not either physically settle in shares or allow us to choose the settlement method. Our total number of outstanding shares of common stock is not reduced until settlement of the private share repurchase contract. We had no unsettled private share repurchase contracts at both September 30, 2018 and September 30, 2017 .
Subsequent Events	Subsequent Events We have evaluated the effects of events that have occurred subsequent to September 30, 2018 , and, except as disclosed elsewhere in the footnotes, there have been no material events that would require recognition in our third quarter 2018 consolidated financial statements or disclosure in the Notes to the consolidated financial statements.
Accounting Standards Update 2017-09 [Member]
Significant Accounting Policies [Line Items]
Accounting Standards Adopted in 2018	ASU 2017-09 clarifies when to account for a change to the terms or conditions of a share-based payment award as a modification. Under the ASU, modification accounting is required only if the fair value, the vesting conditions, or the classification of the award (as equity or liability) changes as a result of the change in terms or conditions. The Update is applied to awards modified on or after the adoption date and accordingly, did not have a material impact on our consolidated financial statements.
Accounting Standards Update 2017-07 [Member]
Significant Accounting Policies [Line Items]
Accounting Standards Adopted in 2018	ASU 2017-07 requires that the service cost component of net benefit cost be reported in the same line item as other compensation costs arising from services rendered by employees during the period, and the other pension cost components (interest cost, expected return on plan assets and amortization of actuarial gains and losses) be presented in the income statement separate from the service cost component. The income statement line item used to present the other pension cost components must be disclosed. We adopted this change in first quarter 2018. The Update did not have a material impact on our consolidated financial statements.
Accounting Standards Update 2017-05 [Member]
Significant Accounting Policies [Line Items]
Accounting Standards Adopted in 2018	ASU 2017-05 provides guidance for recognizing gains and losses from the transfer of nonfinancial assets in contracts with non-customers. The ASU applies to nonfinancial assets, including real estate (e.g., buildings, land, windmills, solar farms), ships and intellectual property. We adopted this change in first quarter 2018. The Update did not have a material impact on our consolidated financial statements.
Accounting Standards Update 2017-01 [Member]
Significant Accounting Policies [Line Items]
Accounting Standards Adopted in 2018	ASU 2017-01 requires that when substantially all of the fair value of gross assets acquired is concentrated in a single asset (or a group of similar assets), the assets acquired would not represent a business. The Update is applied prospectively and accordingly, did not have a material impact on our consolidated financial statements.
Accounting Standards Update 2016-18 [Member]
Significant Accounting Policies [Line Items]
Accounting Standards Adopted in 2018	ASU 2016-18 requires that restricted cash and cash equivalents are included with the total cash and cash equivalents in the consolidated statement of cash flows. In addition, the nature of any restrictions will be disclosed in the footnotes to the financial statements. We adopted this change in first quarter 2018. Our retrospective adoption includes changes to our presentation of cash and cash equivalents in our consolidated statement of cash flows to include both cash and due from banks as well as interest-earning deposits with banks. In addition, we had corresponding changes on our consolidated balance sheets.
Accounting Standards Update 2016-16 [Member]
Significant Accounting Policies [Line Items]
Accounting Standards Adopted in 2018	ASU 2016-16 requires us to recognize the income tax effects of intercompany sales and transfers of assets other than inventory in the period in which the transfer occurs. We adopted this change in first quarter 2018. The Update did not have a material impact on our consolidated financial statements.
Accounting Standards Update 2016-15 [Member]
Significant Accounting Policies [Line Items]
Accounting Standards Adopted in 2018	ASU 2016-15 addresses eight specific cash flow issues with the objective of reducing the existing diversity in practice for reporting in the statement of cash flows. We adopted this change in first quarter 2018. The Update did not have a material impact on our consolidated financial statements.
Accounting Standards Update 2016-04 [Member]
Significant Accounting Policies [Line Items]
Accounting Standards Adopted in 2018	ASU 2016-04 modifies the accounting for certain prepaid card products to require the recognition of breakage. Breakage represents the estimated amount that will not be redeemed by the cardholder for goods or services. We adopted this change in first quarter 2018. Upon adoption, we recorded a cumulative-effect adjustment that increased retained earnings, given estimated breakage, by $20 million .
Accounting Standards Update 2016-01 [Member]
Significant Accounting Policies [Line Items]
Accounting Standards Adopted in 2018	ASU 2016-01 changes the accounting for certain equity securities to record at fair value with unrealized gains or losses reflected in earnings, as well as improve the disclosures of equity securities and the fair value of financial instruments. The Update also requires that for purposes of disclosing the fair value of financial instruments recorded at amortized cost, including loans and long-term debt, the valuation methodology is based on an exit price notion. We adopted the Update in first quarter 2018 and recorded a cumulative-effect adjustment as of January 1, 2018, that increased retained earnings by $106 million as a result of a transition adjustment to reclassify $118 million in net unrealized gains from other comprehensive income to retained earnings, partially offset by a transition adjustment to decrease retained earnings by $12 million primarily to adjust the carrying value of our auction rate securities from cost to fair value. No transition adjustment was recorded for investments changed to the measurement alternative (described below), which was applied prospectively. As a result of adopting this ASU, our investments in marketable equity securities, including those previously classified as available-for-sale, are accounted for at fair value with unrealized gains or losses reflected in earnings. Additionally, our share of unrealized gains or losses related to marketable equity securities held by our equity method investees are reflected in earnings. Prior to adoption, such unrealized gains and losses were reflected in other comprehensive income. Our investments in nonmarketable equity securities previously accounted for under the cost method of accounting, except for federal bank stock, are now accounted for either at fair value with unrealized gains and losses reflected in earnings or using the measurement alternative. The measurement alternative is similar to the cost method of accounting, except the carrying value is adjusted through earnings for impairment, if any, and changes in observable and orderly transactions in the same or similar investment. We account for substantially all of our private equity securities, previously using the cost method of accounting, now under the measurement alternative. Our auction rate securities portfolio is now accounted for at fair value with unrealized gains or losses reflected in earnings. In connection with our adoption of this Update, we have modified our balance sheet and income statement presentation to report marketable and nonmarketable equity securities and their results separately from debt securities by now reporting all equity securities in a new line labeled “Equity securities” in both the balance sheet and income statement. Additionally we now report loans held for trading purposes in loans held for sale and have reclassified net gains and losses on marketable equity securities used as economic hedges of deferred compensation obligations from “Net gains for trading activities” to “Net gains from equity securities”. All prior periods have been revised to conform to these changes in reporting. Table 1.1 provides a summary of our reporting changes implemented in connection with our adoption of ASU 2016-01 in first quarter 2018. Table 1.1: Summary of Reporting Changes Financial instrument or transaction type As previously reported Revised reporting Balance Sheet Marketable equity securities Trading assets and available for sale investment securities Equity securities (new caption) Nonmarketable equity securities Other assets Equity securities (new caption) Loans held for trading Trading assets Loans held for sale Debt securities held for trading Trading assets Debt securities (formerly “Investment securities”) Income Statement Interest income: Marketable equity securities Trading assets and investment securities Equity securities (new caption) Nonmarketable equity securities Other Equity securities (new caption) Loans held for trading Trading assets Loans held for sale Debt securities held for trading Trading assets Debt securities (formerly “Investment securities”) Noninterest income: Deferred compensation gains (1) Net gains from trading activities Net gains from equity securities (1) Reclassification of net gains and losses on marketable equity securities economically hedging our deferred compensation obligations. Table 1.2 summarizes financial assets and liabilities by form and measurement accounting model. Table 1.2: Accounting Model for Financial Assets and Liabilities Balance sheet caption Measurement model(s) Financial statement Note reference Cash and due from banks Cost N/A Interest-earning deposits with banks Cost N/A Federal funds sold and securities purchased under resale agreements Amortized cost N/A Debt securities: Trading FV-NI (1) Note 4: Trading Activities Note 15: Fair Values of Assets and Liabilities Available-for-sale FV-OCI (2) Note 5: Available-for-Sale and Held-to-Maturity Debt Securities Held-to-maturity Amortized cost Note 5: Available-for-Sale and Held-to-Maturity Debt Securities Mortgage loans held for sale FV-NI (1) LOCOM (3) Note 15: Fair Values of Assets and Liabilities Loans held for sale FV-NI (1) Note 15: Fair Values of Assets and Liabilities Loans Amortized cost FV-NI (1) Note 6: Loans and Allowance for Credit Losses Derivative assets and liabilities FV-NI (1) FV-OCI (2) Note 4: Trading Activities Note 15: Fair Values of Assets and Liabilities Equity securities: Marketable FV-NI (1) Note 4: Trading Activities Note 15: Fair Values of Assets and Liabilities Nonmarketable FV-NI (1) Cost method Equity method MA (4) Note 4: Trading Activities Other assets Amortized cost (5) Note 8: Other Assets Deposits Amortized cost N/A Short-term borrowings Amortized cost N/A Long-term debt Amortized cost N/A (1) FV-NI represents the fair value through net income accounting model. (2) FV-OCI represents the fair value through other comprehensive income accounting model. (3) LOCOM represents the lower of cost or fair value accounting model. (4) MA represents the measurement alternative accounting model. (5) Other assets are generally carried at amortized cost, except for bank-owned life insurance which is carried at cash surrender value.
Accounting Standards Update 2014-09 [Member]
Significant Accounting Policies [Line Items]
Accounting Standards Adopted in 2018	ASU 2014-09 modifies the guidance used to recognize revenue from contracts with customers for transfers of goods or services and transfers of non-financial assets, unless those contracts are within the scope of other guidance. Upon a modified retrospective adoption, we recorded a cumulative-effect adjustment that decreased retained earnings by $32 million , due to changes in the timing of revenue for corporate trust services that are provided over the life of the associated trust. In addition, we changed the presentation of some costs such that underwriting expenses of our broker-dealer business that were previously netted against revenue are now included in noninterest expense, and card payment network charges that were previously included in noninterest expense are now netted against card fee revenue.
Accounting Standards Update 2018-02 [Member]
Significant Accounting Policies [Line Items]
Accounting Standards Adopted in 2018	ASU 2018-02 allows a reclassification to update amounts in accumulated other comprehensive income to an appropriate tax rate under the Tax Cuts & Jobs Act. In third quarter 2018, we reclassified $400 million resulting in a reduction of accumulated other comprehensive income and an increase to retained earnings. For additional information, see Note 20: Other Comprehensive Income. In addition, we recognized $104 million of additional tax expense associated with the re-measurement of our initial estimates for the impacts of the Tax Cuts & Jobs Act, in accordance with ASC Topic 740, Income Taxes and SEC Staff Accounting Bulletin 118. These adjustments were included in income tax expense. We continue to collect and analyze data related to our provisional tax estimates and monitor interpretations that emerge for various provisions of the Tax Act. We anticipate the re-measurements will be finalized upon completion of our U.S. tax filings in the fourth quarter.

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	9 Months Ended
	Sep. 30, 2018
Accounting Policies [Abstract]
Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block]	Table 1.2 summarizes financial assets and liabilities by form and measurement accounting model. Table 1.2: Accounting Model for Financial Assets and Liabilities Balance sheet caption Measurement model(s) Financial statement Note reference Cash and due from banks Cost N/A Interest-earning deposits with banks Cost N/A Federal funds sold and securities purchased under resale agreements Amortized cost N/A Debt securities: Trading FV-NI (1) Note 4: Trading Activities Note 15: Fair Values of Assets and Liabilities Available-for-sale FV-OCI (2) Note 5: Available-for-Sale and Held-to-Maturity Debt Securities Held-to-maturity Amortized cost Note 5: Available-for-Sale and Held-to-Maturity Debt Securities Mortgage loans held for sale FV-NI (1) LOCOM (3) Note 15: Fair Values of Assets and Liabilities Loans held for sale FV-NI (1) Note 15: Fair Values of Assets and Liabilities Loans Amortized cost FV-NI (1) Note 6: Loans and Allowance for Credit Losses Derivative assets and liabilities FV-NI (1) FV-OCI (2) Note 4: Trading Activities Note 15: Fair Values of Assets and Liabilities Equity securities: Marketable FV-NI (1) Note 4: Trading Activities Note 15: Fair Values of Assets and Liabilities Nonmarketable FV-NI (1) Cost method Equity method MA (4) Note 4: Trading Activities Other assets Amortized cost (5) Note 8: Other Assets Deposits Amortized cost N/A Short-term borrowings Amortized cost N/A Long-term debt Amortized cost N/A (1) FV-NI represents the fair value through net income accounting model. (2) FV-OCI represents the fair value through other comprehensive income accounting model. (3) LOCOM represents the lower of cost or fair value accounting model. (4) MA represents the measurement alternative accounting model. (5) Other assets are generally carried at amortized cost, except for bank-owned life insurance which is carried at cash surrender value. Table 1.1 provides a summary of our reporting changes implemented in connection with our adoption of ASU 2016-01 in first quarter 2018. Table 1.1: Summary of Reporting Changes Financial instrument or transaction type As previously reported Revised reporting Balance Sheet Marketable equity securities Trading assets and available for sale investment securities Equity securities (new caption) Nonmarketable equity securities Other assets Equity securities (new caption) Loans held for trading Trading assets Loans held for sale Debt securities held for trading Trading assets Debt securities (formerly “Investment securities”) Income Statement Interest income: Marketable equity securities Trading assets and investment securities Equity securities (new caption) Nonmarketable equity securities Other Equity securities (new caption) Loans held for trading Trading assets Loans held for sale Debt securities held for trading Trading assets Debt securities (formerly “Investment securities”) Noninterest income: Deferred compensation gains (1) Net gains from trading activities Net gains from equity securities (1) Reclassification of net gains and losses on marketable equity securities economically hedging our deferred compensation obligations.
Supplemental Cash Flow Information	Supplemental Cash Flow Information Significant noncash activities are presented in Table 1.3. Table 1.3: Supplemental Cash Flow Information Nine months ended September 30, (in millions) 2018 2017 Trading debt securities retained from securitization of MLHFS $ 28,761 43,394 Transfers from loans to MLHFS 4,456 4,015 Transfers from loans to LHFS 2,542 681 Transfers from available-for-sale debt securities to held-to-maturity debt securities 13,372 50,405

Cash, Loan and Dividend Restr_2

Cash, Loan and Dividend Restrictions (Tables)	9 Months Ended
	Sep. 30, 2018
Disclosure of Restrictions on Dividends, Loans and Advances Disclosure [Abstract]
Nature of Restrictions on Cash Equivalents [Table Text Block]	Table 3.1 provides a summary of restrictions on cash equivalents in addition to the FRB reserve cash balance requirements . Table 3.1: Nature of Restrictions on Cash Equivalents (in millions) Sep 30, Dec 31, Average required reserve balance for FRB (1) $ 12,798 12,306 Reserve balance for non-U.S. central banks 554 617 Segregated for benefit of brokerage customers under federal and other brokerage regulations 698 666 Related to consolidated variable interest entities (VIEs) that can only be used to settle liabilities of VIEs 120 487 (1) FRB required reserve balance represents average for the first nine months of 2018 and for the year ended December 31, 2017 .

Trading Activities (Tables)

Trading Activities (Tables)	9 Months Ended
	Sep. 30, 2018
Trading Activities [Abstract]
Trading Assets and Liabilities	Table 4.1 presents a summary of our trading assets and liabilities measured at fair value through earnings . Table 4.1: Trading Assets and Liabilities Sep 30, Dec 31, (in millions) 2018 2017 Trading assets: Debt securities $ 65,188 57,624 Equity securities 26,138 30,004 Loans held for sale 1,266 1,023 Gross trading derivative assets 30,302 31,340 Netting (1) (19,188 ) (19,629 ) Total trading derivative assets 11,114 11,711 Total trading assets 103,706 100,362 Trading liabilities: Short sale 23,992 18,472 Gross trading derivative liabilities 29,268 31,386 Netting (1) (21,842 ) (23,062 ) Total trading derivative liabilities 7,426 8,324 Total trading liabilities $ 31,418 26,796 (1) Represents balance sheet netting for trading derivative asset and liability balances, and trading portfolio level counterparty valuation adjustments.
Net Interest and Net Gains (Losses) on Trading Activities	Table 4.2 provides a summary of the net interest income earned from trading securities, and net gains and losses due to the realized and unrealized gains and losses from trading activities. Table 4.2: Net Interest Income and Net Gains (Losses) on Trading Activities Quarter ended September 30, Nine months ended September 30, (in millions) 2018 2017 2018 2017 Interest income (1): Debt securities $ 723 607 2,043 1,678 Equity securities 178 125 447 370 Loans held for sale 20 11 43 29 Total interest income 921 743 2,533 2,077 Less: Interest expense (2) 157 107 429 305 Net interest income 764 636 2,104 1,772 Net gains (losses) from trading activities: Debt securities (369 ) 52 (1,008 ) 348 Equity securities 1,129 717 25 2,143 Loans held for sale 3 6 18 42 Derivatives (3) (605 ) (655 ) 1,557 (1,990 ) Total net gains from trading activities (4) 158 120 592 543 Total trading-related net interest and noninterest income $ 922 756 2,696 2,315 (1) Represents interest and dividend income earned on trading securities. (2) Represents interest and dividend expense incurred on trading securities we have sold but have not yet purchased. (3) Excludes economic hedging of mortgage banking and asset/liability management activities, for which hedge results (realized and unrealized) are reported with the respective hedged activities. (4) Represents realized gains (losses) from our trading activities and unrealized gains (losses) due to changes in fair value of our trading positions, attributable to the type of asset or liability.

AFS and HTM Debt Securities (Ta

AFS and HTM Debt Securities (Tables)	9 Months Ended
	Sep. 30, 2018
AFS and HTM Debt Securities [Abstract]
AFS and HTM Debt Securities, Amortized Cost and Fair Value, by Category	Table 5.1 provides the amortized cost and fair value by major categories of available-for-sale debt securities, which are carried at fair value, and held-to-maturity debt securities, which are carried at amortized cost. The net unrealized gains (losses) for available-for-sale debt securities are reported on an after-tax basis as a component of cumulative OCI. Information on debt securities held for trading is included in Note 4 (Trading Activities) to Financial Statements in this Report. Table 5.1: Amortized Cost and Fair Value (in millions) Amortized Cost Gross unrealized gains Gross unrealized losses Fair value September 30, 2018 Available-for-sale debt securities: Securities of U.S. Treasury and federal agencies $ 6,347 1 (161 ) 6,187 Securities of U.S. states and political subdivisions (1) 47,565 984 (333 ) 48,216 Mortgage-backed securities: Federal agencies 158,584 289 (5,362 ) 153,511 Residential 2,789 179 (2 ) 2,966 Commercial 3,910 67 (4 ) 3,973 Total mortgage-backed securities 165,283 535 (5,368 ) 160,450 Corporate debt securities 6,365 273 (24 ) 6,614 Collateralized loan and other debt obligations (2) 35,973 239 (18 ) 36,194 Other (3) 5,189 120 (6 ) 5,303 Total available-for-sale debt securities 266,722 2,152 (5,910 ) 262,964 Held-to-maturity debt securities: Securities of U.S. Treasury and federal agencies 44,743 — (1,075 ) 43,668 Securities of U.S. states and political subdivisions 6,293 15 (157 ) 6,151 Federal agency and other mortgage-backed securities (4) 93,020 7 (3,885 ) 89,142 Collateralized loan obligations 75 — — 75 Other (3) — — — — Total held-to-maturity debt securities 144,131 22 (5,117 ) 139,036 Total $ 410,853 2,174 (11,027 ) 402,000 December 31, 2017 Available-for-sale debt securities: Securities of U.S. Treasury and federal agencies $ 6,425 2 (108 ) 6,319 Securities of U.S. states and political subdivisions (1) 50,733 1,032 (439 ) 51,326 Mortgage-backed securities: Federal agencies 160,561 930 (1,272 ) 160,219 Residential 4,356 254 (2 ) 4,608 Commercial 4,487 80 (2 ) 4,565 Total mortgage-backed securities 169,404 1,264 (1,276 ) 169,392 Corporate debt securities 7,343 363 (40 ) 7,666 Collateralized loan and other debt obligations (2) 35,675 384 (3 ) 36,056 Other (3) 5,516 137 (5 ) 5,648 Total available-for-sale debt securities 275,096 3,182 (1,871 ) 276,407 Held-to-maturity debt securities: Securities of U.S. Treasury and federal agencies 44,720 189 (103 ) 44,806 Securities of U.S. states and political subdivisions 6,313 84 (43 ) 6,354 Federal agency and other mortgage-backed securities (4) 87,527 201 (682 ) 87,046 Collateralized loan obligations 661 4 — 665 Other (3) 114 — — 114 Total held-to-maturity debt securities 139,335 478 (828 ) 138,985 Total $ 414,431 3,660 (2,699 ) 415,392 (1) Available-for-sale debt securities include investments in tax-exempt preferred debt securities issued by investment funds or trusts that predominantly invest in tax-exempt municipal securities. The cost basis and fair value of these types of securities was $6.2 billion each at September 30, 2018 , and $5.2 billion each at December 31, 2017 . (2) Available-for-sale debt securities include collateralized debt obligations (CDOs) with a cost basis and fair value of $690 million and $843 million , respectively, at September 30, 2018 , and $887 million and $1.0 billion , respectively, at December 31, 2017 . (3) The “Other” category of available-for-sale debt securities largely includes asset-backed securities collateralized by student loans. Included in the “Other” category of held-to-maturity debt securities are asset-backed securities collateralized by automobile leases or loans and cash with a cost basis and fair value of $0 million each at September 30, 2018 , and $114 million each at December 31, 2017 . (4) Predominantly consists of federal agency mortgage-backed securities at both September 30, 2018 and December 31, 2017 .
AFS and HTM Debt Securities, Gross Unrealized Losses and Fair Value, Over and Under 12 Months	Table 5.2 shows the gross unrealized losses and fair value of available-for-sale and held-to-maturity debt securities by length of time those individual securities in each category have been in a continuous loss position. Debt securities on which we have taken credit-related OTTI write-downs are categorized as being “less than 12 months” or “12 months or more” in a continuous loss position based on the point in time that the fair value declined to below the cost basis and not the period of time since the credit-related OTTI write-down. Table 5.2: Gross Unrealized Losses and Fair Value Less than 12 months 12 months or more Total (in millions) Gross unrealized losses Fair value Gross unrealized losses Fair value Gross unrealized losses Fair value September 30, 2018 Available-for-sale debt securities: Securities of U.S. Treasury and federal agencies $ (32 ) 1,705 (129 ) 4,444 (161 ) 6,149 Securities of U.S. states and political subdivisions (26 ) 7,207 (307 ) 8,737 (333 ) 15,944 Mortgage-backed securities: Federal agencies (2,165 ) 82,975 (3,197 ) 63,029 (5,362 ) 146,004 Residential (1 ) 169 (1 ) 52 (2 ) 221 Commercial (3 ) 438 (1 ) 60 (4 ) 498 Total mortgage-backed securities (2,169 ) 83,582 (3,199 ) 63,141 (5,368 ) 146,723 Corporate debt securities (12 ) 658 (12 ) 246 (24 ) 904 Collateralized loan and other debt obligations (17 ) 8,725 (1 ) 165 (18 ) 8,890 Other (2 ) 476 (4 ) 153 (6 ) 629 Total available-for-sale debt securities (2,258 ) 102,353 (3,652 ) 76,886 (5,910 ) 179,239 Held-to-maturity debt securities: Securities of U.S. Treasury and federal agencies (871 ) 39,298 (204 ) 4,370 (1,075 ) 43,668 Securities of U.S. states and political subdivisions (62 ) 3,101 (95 ) 1,922 (157 ) 5,023 Federal agency and other mortgage-backed securities (1,166 ) 37,313 (2,719 ) 50,258 (3,885 ) 87,571 Collateralized loan obligations — — — — — — Total held-to-maturity debt securities (2,099 ) 79,712 (3,018 ) 56,550 (5,117 ) 136,262 Total $ (4,357 ) 182,065 (6,670 ) 133,436 (11,027 ) 315,501 December 31, 2017 Available-for-sale debt securities: Securities of U.S. Treasury and federal agencies $ (27 ) 4,065 (81 ) 2,209 (108 ) 6,274 Securities of U.S. states and political subdivisions (17 ) 6,179 (422 ) 11,766 (439 ) 17,945 Mortgage-backed securities: Federal agencies (243 ) 52,559 (1,029 ) 44,691 (1,272 ) 97,250 Residential (1 ) 47 (1 ) 58 (2 ) 105 Commercial (1 ) 101 (1 ) 133 (2 ) 234 Total mortgage-backed securities (245 ) 52,707 (1,031 ) 44,882 (1,276 ) 97,589 Corporate debt securities (4 ) 239 (36 ) 503 (40 ) 742 Collateralized loan and other debt obligations (1 ) 373 (2 ) 146 (3 ) 519 Other (1 ) 37 (4 ) 483 (5 ) 520 Total available-for-sale debt securities (295 ) 63,600 (1,576 ) 59,989 (1,871 ) 123,589 Held-to-maturity debt securities: Securities of U.S. Treasury and federal agencies (69 ) 11,255 (34 ) 1,490 (103 ) 12,745 Securities of U.S. states and political subdivisions (5 ) 500 (38 ) 1,683 (43 ) 2,183 Federal agency and other mortgage-backed securities (198 ) 29,713 (484 ) 28,244 (682 ) 57,957 Collateralized loan obligations — — — — — — Total held-to-maturity debt securities (272 ) 41,468 (556 ) 31,417 (828 ) 72,885 Total $ (567 ) 105,068 (2,132 ) 91,406 (2,699 ) 196,474
AFS and HTM Debt Securities, Gross Unrealized Losses and Fair Value, by Investment Grade	Table 5.3 shows the gross unrealized losses and fair value of the available-for-sale and held-to-maturity debt securities by those rated investment grade and those rated less than investment grade, according to their lowest credit rating by Standard & Poor’s Rating Services (S&P) or Moody’s Investors Service (Moody’s). Credit ratings express opinions about the credit quality of a debt security. Debt securities rated investment grade, that is those rated BBB- or higher by S&P or Baa3 or higher by Moody’s, are generally considered by the rating agencies and market participants to be low credit risk. Conversely, debt securities rated below investment grade, labeled as “speculative grade” by the rating agencies, are considered to be distinctively higher credit risk than investment grade debt securities. We have also included debt securities not rated by S&P or Moody’s in the table below based on our internal credit grade of the debt securities (used for credit risk management purposes) equivalent to the credit rating assigned by major credit agencies. The unrealized losses and fair value of unrated debt securities categorized as investment grade based on internal credit grades were $23 million and $5.5 billion , respectively, at September 30, 2018 , and $32 million and $6.9 billion , respectively, at December 31, 2017 . If an internal credit grade was not assigned, we categorized the debt security as non-investment grade. Table 5.3: Gross Unrealized Losses and Fair Value by Investment Grade Investment grade Non-investment grade (in millions) Gross unrealized losses Fair value Gross unrealized losses Fair value September 30, 2018 Available-for-sale debt securities: Securities of U.S. Treasury and federal agencies $ (161 ) 6,149 — — Securities of U.S. states and political subdivisions (314 ) 15,661 (19 ) 283 Mortgage-backed securities: Federal agencies (5,362 ) 146,004 — — Residential (1 ) 147 (1 ) 74 Commercial (1 ) 429 (3 ) 69 Total mortgage-backed securities (5,364 ) 146,580 (4 ) 143 Corporate debt securities (4 ) 276 (20 ) 628 Collateralized loan and other debt obligations (18 ) 8,890 — — Other (3 ) 358 (3 ) 271 Total available-for-sale debt securities (5,864 ) 177,914 (46 ) 1,325 Held-to-maturity debt securities: Securities of U.S. Treasury and federal agencies (1,075 ) 43,668 — — Securities of U.S. states and political subdivisions (157 ) 5,023 — — Federal agency and other mortgage-backed securities (3,873 ) 87,188 (12 ) 383 Collateralized loan obligations — — — — Total held-to-maturity debt securities (5,105 ) 135,879 (12 ) 383 Total $ (10,969 ) 313,793 (58 ) 1,708 December 31, 2017 Available-for-sale debt securities: Securities of U.S. Treasury and federal agencies $ (108 ) 6,274 — — Securities of U.S. states and political subdivisions (412 ) 17,763 (27 ) 182 Mortgage-backed securities: Federal agencies (1,272 ) 97,250 — — Residential (1 ) 42 (1 ) 63 Commercial (1 ) 183 (1 ) 51 Total mortgage-backed securities (1,274 ) 97,475 (2 ) 114 Corporate debt securities (13 ) 304 (27 ) 438 Collateralized loan and other debt obligations (3 ) 519 — — Other (2 ) 469 (3 ) 51 Total available-for-sale debt securities (1,812 ) 122,804 (59 ) 785 Held-to-maturity debt securities: Securities of U.S. Treasury and federal agencies (103 ) 12,745 — — Securities of U.S. states and political subdivisions (43 ) 2,183 — — Federal agency and other mortgage-backed securities (680 ) 57,789 (2 ) 168 Collateralized loan obligations — — — — Total held-to-maturity debt securities (826 ) 72,717 (2 ) 168 Total $ (2,638 ) 195,521 (61 ) 953
AFS and HTM Debt Securities Contractual Maturities	Table 5.4 shows the remaining contractual maturities and contractual weighted-average yields (taxable-equivalent basis) of available-for-sale debt securities. The remaining contractual principal maturities for MBS do not consider prepayments. Remaining expected maturities will differ from contractual maturities because borrowers may have the right to prepay obligations before the underlying mortgages mature. Table 5.4: Contractual Maturities Remaining contractual maturity Total Within one year After one year through five years After five years through ten years After ten years (in millions) amount Yield Amount Yield Amount Yield Amount Yield Amount Yield September 30, 2018 Available-for-sale debt securities (1): Fair value: Securities of U.S. Treasury and federal agencies $ 6,187 1.60 % $ 46 1.96 % $ 6,094 1.59 % $ 47 1.89 % $ — — % Securities of U.S. states and political subdivisions 48,216 4.73 4,216 2.75 6,507 3.33 4,251 3.31 33,242 5.43 Mortgage-backed securities: Federal agencies 153,511 3.38 — — 63 3.52 2,396 2.66 151,052 3.39 Residential 2,966 3.88 — — 16 5.84 7 2.77 2,943 3.88 Commercial 3,973 3.55 — — — — 311 3.50 3,662 3.56 Total mortgage-backed securities 160,450 3.39 — — 79 4.01 2,714 2.75 157,657 3.41 Corporate debt securities 6,614 5.09 372 5.82 2,505 5.28 3,008 4.75 729 5.47 Collateralized loan and other debt obligations 36,194 3.77 — — 33 3.73 10,592 3.78 25,569 3.76 Other 5,303 3.09 19 4.82 834 3.56 1,083 2.32 3,367 3.21 Total available-for-sale debt securities at fair value $ 262,964 3.68 % $ 4,653 2.99 % $ 16,052 2.99 % $ 21,695 3.62 % $ 220,564 3.76 % December 31, 2017 Available-for-sale debt securities (1): ` Fair value: Securities of U.S. Treasury and federal agencies $ 6,319 1.59 % $ 81 1.37 % $ 6,189 1.59 % $ 49 1.89 % $ — — % Securities of U.S. states and political subdivisions 51,326 5.88 2,380 3.47 9,484 3.42 2,276 4.63 37,186 6.75 Mortgage-backed securities: Federal agencies 160,219 3.27 15 2.03 210 3.08 5,534 2.82 154,460 3.28 Residential 4,608 3.52 — — 24 5.67 11 2.46 4,573 3.51 Commercial 4,565 3.45 — — — — 166 2.69 4,399 3.48 Total mortgage-backed securities 169,392 3.28 15 2.03 234 3.35 5,711 2.82 163,432 3.30 Corporate debt securities 7,666 5.12 443 5.54 2,738 5.56 3,549 4.70 936 5.26 Collateralized loan and other debt obligations 36,056 2.98 — — 50 1.68 15,008 2.96 20,998 3.00 Other 5,648 2.46 71 3.56 463 2.72 1,466 2.13 3,648 2.53 Total available-for-sale debt securities at fair value $ 276,407 3.72 % $ 2,990 3.70 % $ 19,158 3.11 % $ 28,059 3.24 % $ 226,200 3.83 % (1) Weighted-average yields displayed by maturity bucket are weighted based on fair value and predominantly represent contractual coupon rates without effect for any related hedging derivatives. Table 5.5 shows the amortized cost and weighted-average yields of held-to-maturity debt securities by contractual maturity. Table 5.5: Amortized Cost by Contractual Maturity Remaining contractual maturity Total Within one year After one year through five years After five years through ten years After ten years (in millions) amount Yield Amount Yield Amount Yield Amount Yield Amount Yield September 30, 2018 Held-to-maturity debt securities (1): Amortized cost: Securities of U.S. Treasury and federal agencies $ 44,743 2.12 % $ — — % $ 32,349 2.04 % $ 12,394 2.32 % $ — — % Securities of U.S. states and political subdivisions 6,293 4.93 — — 52 5.90 1,118 4.97 5,123 4.91 Federal agency and other mortgage-backed securities 93,020 3.09 — — 15 3.40 11 3.10 92,994 3.09 Collateralized loan obligations 75 3.52 — — — — 75 3.52 — — Other — — — — — — — — — — Total held-to-maturity debt securities at amortized cost $ 144,131 2.87 % $ — — % $ 32,416 2.05 % $ 13,598 2.54 % $ 98,117 3.19 % December 31, 2017 Held-to-maturity debt securities (1): Amortized cost: Securities of U.S. Treasury and federal agencies $ 44,720 2.12 % $ — — % $ 32,330 2.04 % $ 12,390 2.32 % $ — — % Securities of U.S. states and political subdivisions 6,313 6.02 — — 50 7.18 695 6.31 5,568 5.98 Federal agency and other mortgage-backed securities 87,527 3.11 — — 15 2.81 11 2.49 87,501 3.11 Collateralized loan obligations 661 2.86 — — — — 661 2.86 — — Other 114 1.83 — — 114 1.83 — — — — Total held-to-maturity debt securities at amortized cost $ 139,335 2.92 % $ — — % $ 32,509 2.05 % $ 13,757 2.55 % $ 93,069 3.28 % (1) Weighted-average yields displayed by maturity bucket are weighted based on amortized cost and predominantly represent contractual coupon rates. Table 5.6 shows the fair value of held-to-maturity debt securities by contractual maturity. Table 5.6: Fair Value by Contractual Maturity Remaining contractual maturity Total Within one year After one year through five years After five years through ten years After ten years (in millions) amount Amount Amount Amount Amount September 30, 2018 Held-to-maturity debt securities: Fair value: Securities of U.S. Treasury and federal agencies $ 43,668 — 31,700 11,968 — Securities of U.S. states and political subdivisions 6,151 — 50 1,111 4,990 Federal agency and other mortgage-backed securities 89,142 — 15 11 89,116 Collateralized loan obligations 75 — — 75 — Other — — — — — Total held-to-maturity debt securities at fair value $ 139,036 — 31,765 13,165 94,106 December 31, 2017 Held-to-maturity debt securities: Fair value: Securities of U.S. Treasury and federal agencies $ 44,806 — 32,388 12,418 — Securities of U.S. states and political subdivisions 6,354 — 49 701 5,604 Federal agency and other mortgage-backed securities 87,046 — 15 11 87,020 Collateralized loan obligations 665 — — 665 — Other 114 — 114 — — Total held-to-maturity debt securities at fair value $ 138,985 — 32,566 13,795 92,624
AFS and HTM Debt Securities, Realized Gains and Losses	Table 5.7 shows the gross realized gains and losses on sales and OTTI write-downs related to available-for-sale debt securities. Table 5.7: Realized Gains and Losses Quarter ended September 30, Nine months ended September 30, (in millions) 2018 2017 2018 2017 Gross realized gains $ 65 191 139 531 Gross realized losses (3 ) (18 ) (17 ) (102 ) OTTI write-downs (5 ) (7 ) (23 ) (107 ) Net realized gains from available-for-sale debt securities $ 57 166 99 322
AFS and HTM Debt Securities, Other Than Temporary Impairment	Table 5.8 shows the detail of total OTTI write-downs included in earnings for available-for-sale debt securities. There were no OTTI write-downs on held-to-maturity debt securities during the first nine months of 2018 and 2017 . Table 5.8: Detail of OTTI Write-downs Quarter ended September 30, Nine months ended September 30, (in millions) 2018 2017 2018 2017 Debt securities OTTI write-downs included in earnings: Securities of U.S. states and political subdivisions $ — 1 2 9 Mortgage-backed securities: Residential — 1 2 7 Commercial 1 4 15 70 Corporate debt securities — 1 — 21 Other debt securities 4 — 4 — Total debt securities OTTI write-downs included in earnings $ 5 7 23 107
AFS and HTM Debt Securities Other Than Temporary Impairment Included in Earnings	Table 5.9 shows the detail of OTTI write-downs on available-for-sale debt securities included in earnings and the related changes in OCI for the same securities. Table 5.9: OTTI Write-downs Included in Earnings and the Related Changes in OCI Quarter ended September 30, Nine months ended September 30, (in millions) 2018 2017 2018 2017 OTTI on debt securities Recorded as part of gross realized losses: Credit-related OTTI $ 5 6 22 105 Intent-to-sell OTTI — 1 1 2 Total recorded as part of gross realized losses 5 7 23 107 Changes to OCI for losses (reversal of losses) in non-credit-related OTTI (1): Securities of U.S. states and political subdivisions — — (2 ) (5 ) Residential mortgage-backed securities — (1 ) (1 ) (1 ) Commercial mortgage-backed securities (5 ) — (6 ) (47 ) Corporate debt securities — — — 1 Other debt securities — (1 ) — (1 ) Total changes to OCI for non-credit-related OTTI (5 ) (2 ) (9 ) (53 ) Total OTTI losses (reversal of losses) recorded on debt securities $ — 5 14 54 (1) Represents amounts recorded to OCI for impairment of debt securities, due to factors other than credit, that have also had credit-related OTTI write-downs during the period. Increases represent initial or subsequent non-credit-related OTTI on debt securities. Decreases represent partial to full reversal of impairment due to recoveries in the fair value of debt securities due to non-credit factors.
Rollforward of Credit Loss Component Of Credit-Impaired AFS and HTM Debt Securities	Table 5.10 presents a rollforward of the OTTI credit loss that has been recognized in earnings as a write-down of available-for-sale debt securities we still own (referred to as “credit-impaired” debt securities) and do not intend to sell. Recognized credit loss represents the difference between the present value of expected future cash flows discounted using the security’s current effective interest rate and the amortized cost basis of the security prior to considering credit loss. Table 5.10: Rollforward of OTTI Credit Loss Quarter ended September 30, Nine months ended September 30, (in millions) 2018 2017 2018 2017 Credit loss recognized, beginning of period $ 626 1,120 742 1,043 Additions: For securities with initial credit impairments — — — 8 For securities with previous credit impairments 5 6 22 97 Total additions 5 6 22 105 Reductions: For securities sold, matured, or intended/required to be sold (68 ) (96 ) (199 ) (114 ) For recoveries of previous credit impairments (1) — (1 ) (2 ) (5 ) Total reductions (68 ) (97 ) (201 ) (119 ) Credit loss recognized, end of period $ 563 1,029 563 1,029 (1) Recoveries of previous credit impairments result from increases in expected cash flows subsequent to credit loss recognition. Such recoveries are reflected prospectively as interest yield adjustments using the effective interest method.

Loans and Allowance for Credi_2

Loans and Allowance for Credit Losses (Tables)	9 Months Ended
	Sep. 30, 2018
Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract]
Loans and Allowance for Credit Losses, Loans Outstanding	Table 6.1 presents total loans outstanding by portfolio segment and class of financing receivable. Outstanding balances include a total net reduction of $2.0 billion and $3.9 billion at September 30, 2018 , and December 31, 2017 , respectively, for unearned income, net deferred loan fees, and unamortized discounts and premiums, which among other things, reflect the impact of various loan sales. Table 6.1: Loans Outstanding (in millions) Sep 30, Dec 31, Commercial: Commercial and industrial $ 338,048 333,125 Real estate mortgage 120,403 126,599 Real estate construction 23,690 24,279 Lease financing 19,745 19,385 Total commercial 501,886 503,388 Consumer: Real estate 1-4 family first mortgage 284,273 284,054 Real estate 1-4 family junior lien mortgage 35,330 39,713 Credit card 37,812 37,976 Automobile 46,075 53,371 Other revolving credit and installment 36,924 38,268 Total consumer 440,414 453,382 Total loans $ 942,300 956,770 Our foreign loans are reported by respective class of financing receivable in the table above. Substantially all of our foreign loan portfolio is commercial loans. Loans are classified as foreign primarily based on whether the borrower’s primary address is outside of the United States. Table 6.2 presents total commercial foreign loans outstanding by class of financing receivable. Table 6.2: Commercial Foreign Loans Outstanding (in millions) Sep 30, Dec 31, Commercial foreign loans: Commercial and industrial $ 61,696 60,106 Real estate mortgage 6,891 8,033 Real estate construction 726 655 Lease financing 1,187 1,126 Total commercial foreign loans $ 70,500 69,920
Loans and Allowance for Credit Losses, Significant Activity	Table 6.3 summarizes the proceeds paid or received for purchases and sales of loans and transfers from loans held for investment to mortgages/loans held for sale at lower of cost or fair value. This loan activity also includes participating interests, whereby we receive or transfer a portion of a loan. The table excludes PCI loans and loans for which we have elected the fair value option, including loans originated for sale because their loan activity normally does not impact the allowance for credit losses. Table 6.3: Loan Purchases, Sales, and Transfers 2018 2017 (in millions) Commercial Consumer (1) Total Commercial Consumer (1) Total Quarter ended September 30, Purchases $ 225 4 229 449 — 449 Sales (438 ) (113 ) (551 ) (310 ) (145 ) (455 ) Transfers (to) from MLHFS/LHFS (21 ) (371 ) (392 ) 374 — 374 Nine months ended September 30, Purchases $ 879 11 890 2,418 2 2,420 Sales (1,192 ) (201 ) (1,393 ) (1,649 ) (291 ) (1,940 ) Transfers (to) from MLHFS/LHFS (541 ) (1,996 ) (2,537 ) (284 ) (1 ) (285 ) (1) Excludes activity in government insured/guaranteed real estate 1-4 family first mortgage loans. As servicer, we are able to buy delinquent insured/guaranteed loans out of the Government National Mortgage Association (GNMA) pools, and manage and/or resell them in accordance with applicable requirements. These loans are predominantly insured by the Federal Housing Administration (FHA) or guaranteed by the Department of Veterans Affairs (VA). Accordingly, these loans have limited impact on the allowance for loan losses.
Loans and Allowance for Credit Losses, Commitments to Lend	The contractual amount of our unfunded credit commitments, including unissued standby and commercial letters of credit, is summarized by portfolio segment and class of financing receivable in Table 6.4 . The table excludes the issued standby and commercial letters of credit and temporary advance arrangements described above. Table 6.4: Unfunded Credit Commitments (in millions) Sep 30, Dec 31, Commercial: Commercial and industrial $ 330,296 326,626 Real estate mortgage 7,042 7,485 Real estate construction 15,198 16,621 Total commercial 352,536 350,732 Consumer: Real estate 1-4 family first mortgage 30,566 29,876 Real estate 1-4 family junior lien mortgage 37,959 38,897 Credit card 109,871 108,465 Other revolving credit and installment 27,832 27,541 Total consumer 206,228 204,779 Total unfunded credit commitments $ 558,764 555,511
Loans and Allowance for Credit Losses, Allowance for Credit Losses	Table 6.5 presents the allowance for credit losses, which consists of the allowance for loan losses and the allowance for unfunded credit commitments. Table 6.5: Allowance for Credit Losses Quarter ended September 30, Nine months ended September 30, (in millions) 2018 2017 2018 2017 Balance, beginning of period $ 11,110 12,146 11,960 12,540 Provision for credit losses 580 717 1,223 1,877 Interest income on certain impaired loans (1) (42 ) (43 ) (128 ) (137 ) Loan charge-offs: Commercial: Commercial and industrial (209 ) (194 ) (507 ) (608 ) Real estate mortgage (9 ) (21 ) (30 ) (34 ) Real estate construction — — — — Lease financing (15 ) (11 ) (52 ) (31 ) Total commercial (233 ) (226 ) (589 ) (673 ) Consumer: Real estate 1-4 family first mortgage (45 ) (67 ) (141 ) (191 ) Real estate 1-4 family junior lien mortgage (47 ) (70 ) (141 ) (225 ) Credit card (376 ) (337 ) (1,185 ) (1,083 ) Automobile (214 ) (274 ) (730 ) (741 ) Other revolving credit and installment (161 ) (170 ) (505 ) (544 ) Total consumer (843 ) (918 ) (2,702 ) (2,784 ) Total loan charge-offs (1,076 ) (1,144 ) (3,291 ) (3,457 ) Loan recoveries: Commercial: Commercial and industrial 61 69 216 234 Real estate mortgage 10 24 46 68 Real estate construction 2 15 12 27 Lease financing 8 5 18 13 Total commercial 81 113 292 342 Consumer: Real estate 1-4 family first mortgage 70 83 207 216 Real estate 1-4 family junior lien mortgage 56 69 171 205 Credit card 77 60 231 177 Automobile 84 72 279 246 Other revolving credit and installment 28 30 88 94 Total consumer 315 314 976 938 Total loan recoveries 396 427 1,268 1,280 Net loan charge-offs (680 ) (717 ) (2,023 ) (2,177 ) Other (12 ) 6 (76 ) 6 Balance, end of period $ 10,956 12,109 10,956 12,109 Components: Allowance for loan losses $ 10,021 11,078 10,021 11,078 Allowance for unfunded credit commitments 935 1,031 935 1,031 Allowance for credit losses $ 10,956 12,109 10,956 12,109 Net loan charge-offs (annualized) as a percentage of average total loans 0.29 % 0.30 0.29 0.30 Allowance for loan losses as a percentage of total loans 1.06 1.16 1.06 1.16 Allowance for credit losses as a percentage of total loans 1.16 1.27 1.16 1.27 (1) Certain impaired loans with an allowance calculated by discounting expected cash flows using the loan’s effective interest rate over the remaining life of the loan recognize changes in allowance attributable to the passage of time as interest income.
Loans and Allowance for Credit Losses, Allowance Activity by Portfolio Segment	Table 6.6 summarizes the activity in the allowance for credit losses by our commercial and consumer portfolio segments. Table 6.6: Allowance Activity by Portfolio Segment 2018 2017 (in millions) Commercial Consumer Total Commercial Consumer Total Quarter ended September 30, Balance, beginning of period $ 6,711 4,399 11,110 6,961 5,185 12,146 Provision (reversal of provision) for credit losses 22 558 580 (9 ) 726 717 Interest income on certain impaired loans (12 ) (30 ) (42 ) (13 ) (30 ) (43 ) Loan charge-offs (233 ) (843 ) (1,076 ) (226 ) (918 ) (1,144 ) Loan recoveries 81 315 396 113 314 427 Net loan charge-offs (152 ) (528 ) (680 ) (113 ) (604 ) (717 ) Other (1 ) (11 ) (12 ) 6 — 6 Balance, end of period $ 6,568 4,388 10,956 6,832 5,277 12,109 Nine months ended September 30, Balance, beginning of period $ 6,632 5,328 11,960 7,394 5,146 12,540 Provision (reversal of provision) for credit losses 280 943 1,223 (195 ) 2,072 1,877 Interest income on certain impaired loans (37 ) (91 ) (128 ) (42 ) (95 ) (137 ) Loan charge-offs (589 ) (2,702 ) (3,291 ) (673 ) (2,784 ) (3,457 ) Loan recoveries 292 976 1,268 342 938 1,280 Net loan charge-offs (297 ) (1,726 ) (2,023 ) (331 ) (1,846 ) (2,177 ) Other (10 ) (66 ) (76 ) 6 — 6 Balance, end of period $ 6,568 4,388 10,956 6,832 5,277 12,109
Loans and Allowance for Credit Losses, by Impairment Methodology	Table 6.7 disaggregates our allowance for credit losses and recorded investment in loans by impairment methodology. Table 6.7: Allowance by Impairment Methodology Allowance for credit losses Recorded investment in loans (in millions) Commercial Consumer Total Commercial Consumer Total September 30, 2018 Collectively evaluated (1) $ 6,062 3,407 9,469 498,353 420,014 918,367 Individually evaluated (2) 499 981 1,480 3,488 13,504 16,992 PCI (3) 7 — 7 45 6,896 6,941 Total $ 6,568 4,388 10,956 501,886 440,414 942,300 December 31, 2017 Collectively evaluated (1) $ 5,927 4,143 10,070 499,342 425,919 925,261 Individually evaluated (2) 705 1,185 1,890 3,960 14,714 18,674 PCI (3) — — — 86 12,749 12,835 Total $ 6,632 5,328 11,960 503,388 453,382 956,770 (1) Represents loans collectively evaluated for impairment in accordance with Accounting Standards Codification (ASC) 450-20, Loss Contingencies (formerly FAS 5), and pursuant to amendments by ASU 2010-20 regarding allowance for non-impaired loans. (2) Represents loans individually evaluated for impairment in accordance with ASC 310-10, Receivables (formerly FAS 114), and pursuant to amendments by ASU 2010-20 regarding allowance for impaired loans. (3) Represents the allowance and related loan carrying value determined in accordance with ASC 310-30 , Receivables – Loans and Debt Securities Acquired with Deteriorated Credit Quality (formerly SOP 03-3) and pursuant to amendments by ASU 2010-20 regarding allowance for PCI loans.
Loans and Allowance for Credit Losses, Loans by Credit Quality Indicator	Table 6.8 provides a breakdown of outstanding commercial loans by risk category. Of the $15.7 billion in criticized commercial and industrial loans and $4.7 billion in criticized commercial real estate (CRE) loans at September 30, 2018 , $1.6 billion and $647 million , respectively, have been placed on nonaccrual status and written down to net realizable collateral value. Table 6.8: Commercial Loans by Risk Category (in millions) Commercial and industrial Real estate mortgage Real estate construction Lease financing Total September 30, 2018 By risk category: Pass $ 322,264 115,970 23,419 18,751 480,404 Criticized 15,739 4,433 271 994 21,437 Total commercial loans (excluding PCI) 338,003 120,403 23,690 19,745 501,841 Total commercial PCI loans (carrying value) 45 — — — 45 Total commercial loans $ 338,048 120,403 23,690 19,745 501,886 December 31, 2017 By risk category: Pass $ 316,431 122,312 23,981 18,162 480,886 Criticized 16,608 4,287 298 1,223 22,416 Total commercial loans (excluding PCI) 333,039 126,599 24,279 19,385 503,302 Total commercial PCI loans (carrying value) 86 — — — 86 Total commercial loans $ 333,125 126,599 24,279 19,385 503,388
Loans and Allowance for Credit Losses, Loans by Delinquency Status, Commercial	Table 6.9 provides past due information for commercial loans, which we monitor as part of our credit risk management practices. Table 6.9: Commercial Loans by Delinquency Status (in millions) Commercial and industrial Real estate mortgage Real estate construction Lease financing Total September 30, 2018 By delinquency status: Current-29 days past due (DPD) and still accruing $ 336,004 119,445 23,506 19,494 498,449 30-89 DPD and still accruing 402 299 140 155 996 90+ DPD and still accruing 42 56 — — 98 Nonaccrual loans 1,555 603 44 96 2,298 Total commercial loans (excluding PCI) 338,003 120,403 23,690 19,745 501,841 Total commercial PCI loans (carrying value) 45 — — — 45 Total commercial loans $ 338,048 120,403 23,690 19,745 501,886 December 31, 2017 By delinquency status: Current-29 DPD and still accruing $ 330,319 125,642 24,107 19,148 499,216 30-89 DPD and still accruing 795 306 135 161 1,397 90+ DPD and still accruing 26 23 — — 49 Nonaccrual loans 1,899 628 37 76 2,640 Total commercial loans (excluding PCI) 333,039 126,599 24,279 19,385 503,302 Total commercial PCI loans (carrying value) 86 — — — 86 Total commercial loans $ 333,125 126,599 24,279 19,385 503,388
Loans and Allowance for Credit Losses, Loans by Delinquency Status, Consumer	Table 6.10 provides the outstanding balances of our consumer portfolio by delinquency status. Table 6.10: Consumer Loans by Delinquency Status (in millions) Real estate 1-4 family first mortgage Real estate 1-4 family junior lien mortgage Credit card Automobile Other revolving credit and installment Total September 30, 2018 By delinquency status: Current-29 DPD $ 261,118 34,551 36,871 44,661 36,590 413,791 30-59 DPD 1,498 253 284 1,005 119 3,159 60-89 DPD 531 126 197 300 94 1,248 90-119 DPD 232 73 173 108 74 660 120-179 DPD 239 82 286 1 24 632 180+ DPD 891 227 1 — 23 1,142 Government insured/guaranteed loans (1) 12,886 — — — — 12,886 Total consumer loans (excluding PCI) 277,395 35,312 37,812 46,075 36,924 433,518 Total consumer PCI loans (carrying value) 6,878 18 — — — 6,896 Total consumer loans $ 284,273 35,330 37,812 46,075 36,924 440,414 December 31, 2017 By delinquency status: Current-29 DPD $ 251,786 38,746 36,996 51,445 37,885 416,858 30-59 DPD 1,893 336 287 1,385 155 4,056 60-89 DPD 742 163 201 392 93 1,591 90-119 DPD 369 103 192 146 80 890 120-179 DPD 308 95 298 3 30 734 180+ DPD 1,091 243 2 — 25 1,361 Government insured/guaranteed loans (1) 15,143 — — — — 15,143 Total consumer loans (excluding PCI) 271,332 39,686 37,976 53,371 38,268 440,633 Total consumer PCI loans (carrying value) 12,722 27 — — — 12,749 Total consumer loans $ 284,054 39,713 37,976 53,371 38,268 453,382 (1) Represents loans whose repayments are predominantly insured by the FHA or guaranteed by the VA. Loans insured/guaranteed by the FHA/VA and 90+ DPD totaled $7.9 billion at September 30, 2018 , compared with $10.5 billion at December 31, 2017 .
Loans and Allowance for Credit Losses, Loans by FICO Score, Consumer	Table 6.11 provides a breakdown of our consumer portfolio by FICO. Most of the scored consumer portfolio has an updated FICO of 680 and above, reflecting a strong current borrower credit profile. FICO is not available for certain loan types, or may not be required if we deem it unnecessary due to strong collateral and other borrower attributes. Substantially all loans not requiring a FICO score are securities-based loans originated through retail brokerage, and totaled $9.0 billion at September 30, 2018 , and $8.5 billion at December 31, 2017 . Table 6.11: Consumer Loans by FICO (in millions) Real estate 1-4 family first mortgage (1) Real estate 1-4 family junior lien mortgage (1) Credit card Automobile Other revolving credit and installment Total September 30, 2018 By FICO: < 600 $ 4,363 1,485 3,476 7,237 753 17,314 600-639 3,017 1,044 3,005 4,546 785 12,397 640-679 5,840 1,968 5,504 6,383 1,749 21,444 680-719 13,813 4,073 7,553 7,524 3,246 36,209 720-759 27,330 5,487 8,223 6,991 4,728 52,759 760-799 57,101 6,494 6,470 6,008 5,863 81,936 800+ 147,812 13,401 3,040 7,252 8,276 179,781 No FICO available 5,233 1,360 541 134 2,568 9,836 FICO not required — — — — 8,956 8,956 Government insured/guaranteed loans (1) 12,886 — — — — 12,886 Total consumer loans (excluding PCI) 277,395 35,312 37,812 46,075 36,924 433,518 Total consumer PCI loans (carrying value) 6,878 18 — — — 6,896 Total consumer loans $ 284,273 35,330 37,812 46,075 36,924 440,414 December 31, 2017 By FICO: < 600 $ 5,145 1,768 3,525 8,858 863 20,159 600-639 3,487 1,253 3,101 5,615 904 14,360 640-679 6,789 2,387 5,690 7,696 1,959 24,521 680-719 14,977 4,797 7,628 8,825 3,582 39,809 720-759 27,926 6,246 8,097 7,806 5,089 55,164 760-799 55,590 7,323 6,372 6,468 6,257 82,010 800+ 136,729 15,144 2,994 7,845 8,455 171,167 No FICO available 5,546 768 569 258 2,648 9,789 FICO not required — — — — 8,511 8,511 Government insured/guaranteed loans (1) 15,143 — — — — 15,143 Total consumer loans (excluding PCI) 271,332 39,686 37,976 53,371 38,268 440,633 Total consumer PCI loans (carrying value) 12,722 27 — — — 12,749 Total consumer loans $ 284,054 39,713 37,976 53,371 38,268 453,382 (1) Represents loans whose repayments are predominantly insured by the FHA or guaranteed by the VA.
Loans and Allowance for Credit Losses, Loans by Loan to Value Ratio, Consumer	Table 6.12 shows the most updated LTV and CLTV distribution of the real estate 1-4 family first and junior lien mortgage loan portfolios. We consider the trends in residential real estate markets as we monitor credit risk and establish our allowance for credit losses. In the event of a default, any loss should be limited to the portion of the loan amount in excess of the net realizable value of the underlying real estate collateral value. Certain loans do not have an LTV or CLTV due to industry data availability and portfolios acquired from or serviced by other institutions. Table 6.12: Consumer Loans by LTV/CLTV September 30, 2018 December 31, 2017 (in millions) Real estate 1-4 family first mortgage by LTV Real estate 1-4 family junior lien mortgage by CLTV Total Real estate 1-4 family first mortgage by LTV Real estate 1-4 family junior lien mortgage by CLTV Total By LTV/CLTV: 0-60% $ 147,186 15,949 163,135 133,902 16,301 150,203 60.01-80% 102,473 11,344 113,817 104,639 12,918 117,557 80.01-100% 11,983 5,175 17,158 13,924 6,580 20,504 100.01-120% (1) 1,353 1,774 3,127 1,868 2,427 4,295 > 120% (1) 536 649 1,185 783 1,008 1,791 No LTV/CLTV available 978 421 1,399 1,073 452 1,525 Government insured/guaranteed loans (2) 12,886 — 12,886 15,143 — 15,143 Total consumer loans (excluding PCI) 277,395 35,312 312,707 271,332 39,686 311,018 Total consumer PCI loans (carrying value) 6,878 18 6,896 12,722 27 12,749 Total consumer loans $ 284,273 35,330 319,603 284,054 39,713 323,767 (1) Reflects total loan balances with LTV/CLTV amounts in excess of 100%. In the event of default, the loss content would generally be limited to only the amount in excess of 100% LTV/CLTV. (2) Represents loans whose repayments are predominantly insured by the FHA or guaranteed by the VA.
Loans and Allowance for Credit Losses, Nonaccrual Loans	Table 6.13 provides loans on nonaccrual status. PCI loans are excluded from this table because they continue to earn interest from accretable yield, independent of performance in accordance with their contractual terms. Table 6.13: Nonaccrual Loans (in millions) Sep 30, Dec 31, Commercial: Commercial and industrial $ 1,555 1,899 Real estate mortgage 603 628 Real estate construction 44 37 Lease financing 96 76 Total commercial 2,298 2,640 Consumer: Real estate 1-4 family first mortgage (1) 3,605 4,122 Real estate 1-4 family junior lien mortgage 984 1,086 Automobile 118 130 Other revolving credit and installment 48 58 Total consumer 4,755 5,396 Total nonaccrual loans (excluding PCI) $ 7,053 8,036 (1) Includes MLHFS of $132 million and $136 million at September 30, 2018 , and December 31, 2017 , respectively.
Loans and Allowance for Credit Losses, 90 days or More Past Due and Still Accruing Loans	Table 6.14 shows non-PCI loans 90 days or more past due and still accruing by class for loans not government insured/guaranteed. Table 6.14: Loans 90 Days or More Past Due and Still Accruing (in millions) Sep 30, 2018 Dec 31, 2017 Total (excluding PCI): $ 9,209 11,997 Less: FHA insured/VA guaranteed (1)(2) 8,276 10,934 Total, not government insured/guaranteed $ 933 1,063 By segment and class, not government insured/guaranteed: Commercial: Commercial and industrial $ 42 26 Real estate mortgage 56 23 Total commercial 98 49 Consumer: Real estate 1-4 family first mortgage (2) 129 219 Real estate 1-4 family junior lien mortgage (2) 32 60 Credit card 460 492 Automobile 108 143 Other revolving credit and installment 106 100 Total consumer 835 1,014 Total, not government insured/guaranteed $ 933 1,063 (1) Represents loans whose repayments are predominantly insured by the FHA or guaranteed by the VA. (2) Includes mortgage loans held for sale 90 days or more past due and still accruing.
Loans and Allowance for Credit Losses, Impaired Loans	Table 6.15 summarizes key information for impaired loans. Our impaired loans predominantly include loans on nonaccrual status in the commercial portfolio segment and loans modified in a TDR, whether on accrual or nonaccrual status. These impaired loans generally have estimated losses which are included in the allowance for credit losses. We have impaired loans with no allowance for credit losses when loss content has been previously recognized through charge-offs and we do not anticipate additional charge-offs or losses, or certain loans are currently performing in accordance with their terms and for which no loss has been estimated. Impaired loans exclude PCI loans. Table 6.15 includes trial modifications that totaled $163 million at September 30, 2018 , and $194 million at December 31, 2017 . For additional information on our impaired loans and allowance for credit losses, see Note 1 (Summary of Significant Accounting Policies) in our 2017 Form 10-K. Table 6.15: Impaired Loans Summary Recorded investment (in millions) Unpaid principal balance (1) Impaired loans Impaired loans with related allowance for credit losses Related allowance for credit losses September 30, 2018 Commercial: Commercial and industrial $ 3,102 2,200 1,806 321 Real estate mortgage 1,311 1,107 1,064 142 Real estate construction 111 63 48 10 Lease financing 148 118 118 26 Total commercial 4,672 3,488 3,036 499 Consumer: Real estate 1-4 family first mortgage 12,719 11,087 4,747 571 Real estate 1-4 family junior lien mortgage 1,950 1,748 1,216 198 Credit card 431 431 431 167 Automobile 157 91 45 8 Other revolving credit and installment 155 147 129 37 Total consumer (2) 15,412 13,504 6,568 981 Total impaired loans (excluding PCI) $ 20,084 16,992 9,604 1,480 December 31, 2017 Commercial: Commercial and industrial $ 3,577 2,568 2,310 462 Real estate mortgage 1,502 1,239 1,207 211 Real estate construction 95 54 45 9 Lease financing 132 99 89 23 Total commercial 5,306 3,960 3,651 705 Consumer: Real estate 1-4 family first mortgage 14,020 12,225 6,060 770 Real estate 1-4 family junior lien mortgage 2,135 1,918 1,421 245 Credit card 356 356 356 136 Automobile 157 87 34 5 Other revolving credit and installment 136 128 117 29 Total consumer (2) 16,804 14,714 7,988 1,185 Total impaired loans (excluding PCI) $ 22,110 18,674 11,639 1,890 (1) Excludes the unpaid principal balance for loans that have been fully charged off or otherwise have zero recorded investment. (2) Includes the recorded investment of $1.3 billion at September 30, 2018 and $1.4 billion at December 31, 2017 , of government insured/guaranteed loans that are predominantly insured by the FHA or guaranteed by the VA and generally do not have an allowance. Impaired loans may also have limited, if any, allowance when the recorded investment of the loan approximates estimated net realizable value as a result of charge-offs prior to a TDR modification.
Loans and Allowance for Credit Losses, Average Recorded Investment in Impaired Loans	Table 6.16 provides the average recorded investment in impaired loans and the amount of interest income recognized on impaired loans by portfolio segment and class. Table 6.16: Average Recorded Investment in Impaired Loans Quarter ended September 30, Nine months ended September 30, 2018 2017 2018 2017 (in millions) Average recorded investment Recognized interest income Average recorded investment Recognized interest income Average recorded investment Recognized interest income Average recorded investment Recognized interest income Commercial: Commercial and industrial $ 2,325 59 3,208 22 2,316 138 3,460 91 Real estate mortgage 1,172 16 1,293 19 1,225 66 1,351 70 Real estate construction 66 2 58 — 62 4 69 3 Lease financing 117 — 105 1 127 1 110 1 Total commercial 3,680 77 4,664 42 3,730 209 4,990 165 Consumer: Real estate 1-4 family first mortgage 11,318 165 13,044 180 11,718 504 13,594 555 Real estate 1-4 family junior lien mortgage 1,775 29 2,009 30 1,832 87 2,072 92 Credit card 421 14 326 9 396 36 314 26 Automobile 87 2 86 2 85 8 84 8 Other revolving credit and installment 145 2 123 2 139 7 114 6 Total consumer 13,746 212 15,588 223 14,170 642 16,178 687 Total impaired loans (excluding PCI) $ 17,426 289 20,252 265 17,900 851 21,168 852 Interest income: Cash basis of accounting $ 92 64 257 219 Other (1) 197 201 594 633 Total interest income $ 289 265 851 852 (1) Includes interest recognized on accruing TDRs, interest recognized related to certain impaired loans which have an allowance calculated using discounting, and amortization of purchase accounting adjustments related to certain impaired loans.
Loans and Allowance for Credit Losses, Troubled Debt Restructurings, Modification by Type	Table 6.17 summarizes our TDR modifications for the periods presented by primary modification type and includes the financial effects of these modifications. For those loans that modify more than once, the table reflects each modification that occurred during the period. Loans that both modify and pay off within the period, as well as changes in recorded investment during the period for loans modified in prior periods, are not included in the table. Table 6.17: TDR Modifications Primary modification type (1) Financial effects of modifications (in millions) Principal (2) Interest rate reduction Other concessions (3) Total Charge- offs (4) Weighted average interest rate reduction Recorded investment related to interest rate reduction (5) Quarter ended September 30, 2018 Commercial: Commercial and industrial $ — 3 802 805 3 1.30 % $ 3 Real estate mortgage — 20 78 98 — 0.98 20 Real estate construction — — 15 15 — — — Lease financing — — 22 22 — — — Total commercial — 23 917 940 3 1.02 23 Consumer: Real estate 1-4 family first mortgage 58 4 225 287 1 2.27 30 Real estate 1-4 family junior lien mortgage 2 11 31 44 — 2.09 13 Credit card — 84 — 84 — 12.78 84 Automobile 7 6 17 30 9 5.95 6 Other revolving credit and installment — 12 4 16 — 8.25 12 Trial modifications (6) — — (20 ) (20 ) — — — Total consumer 67 117 257 441 10 8.98 145 Total $ 67 140 1,174 1,381 13 7.88 % $ 168 Quarter ended September 30, 2017 Commercial: Commercial and industrial $ — 19 481 500 60 0.34 % $ 18 Real estate mortgage 1 12 98 111 7 1.58 13 Real estate construction — — 1 1 — 1.85 — Lease financing — — 23 23 — — — Total commercial 1 31 603 635 67 0.85 31 Consumer: Real estate 1-4 family first mortgage 48 15 272 335 2 2.62 41 Real estate 1-4 family junior lien mortgage 3 23 20 46 4 3.97 26 Credit card — 74 — 74 — 12.00 74 Automobile 1 4 20 25 12 5.53 4 Other revolving credit and installment — 11 1 12 — 7.72 12 Trial modifications (6) — — (10 ) (10 ) — — — Total consumer 52 127 303 482 18 7.68 157 Total $ 53 158 906 1,117 85 6.56 % $ 188 Primary modification type (1) Financial effects of modifications (in millions) Principal (2) Interest rate reduction Other concessions (3) Total Charge- offs (4) Weighted average interest rate reduction Recorded investment related to interest rate reduction (5) Nine months ended September 30, 2018 Commercial: Commercial and industrial $ 3 17 1,739 1,759 23 0.95 % $ 17 Real estate mortgage — 37 297 334 — 0.94 37 Real estate construction — — 19 19 — — — Lease financing — — 61 61 — — — Total commercial 3 54 2,116 2,173 23 0.94 54 Consumer: Real estate 1-4 family first mortgage 168 22 817 1,007 4 2.31 96 Real estate 1-4 family junior lien mortgage 5 31 89 125 3 1.96 35 Credit card — 253 — 253 — 12.42 253 Automobile 10 14 42 66 23 6.25 14 Other revolving credit and installment — 37 8 45 — 8.04 37 Trial modifications (6) — — 12 12 — — — Total consumer 183 357 968 1,508 30 8.77 435 Total $ 186 411 3,084 3,681 53 7.90 % $ 489 Nine months ended September 30, 2017 Commercial: Commercial and industrial $ 17 38 2,323 2,378 154 0.61 % $ 37 Real estate mortgage 5 51 416 472 20 1.31 52 Real estate construction — 1 24 25 — 0.90 1 Lease financing — — 37 37 — — — Total commercial 22 90 2,800 2,912 174 1.02 90 Consumer: Real estate 1-4 family first mortgage 196 132 797 1,125 14 2.59 227 Real estate 1-4 family junior lien mortgage 23 70 64 157 13 3.26 80 Credit card — 188 — 188 — 12.21 188 Automobile 2 11 52 65 30 5.92 11 Other revolving credit and installment — 38 5 43 1 7.41 38 Trial modifications (6) — — (54 ) (54 ) — — — Total consumer 221 439 864 1,524 58 6.41 544 Total $ 243 529 3,664 4,436 232 5.64 % $ 634 (1) Amounts represent the recorded investment in loans after recognizing the effects of the TDR, if any. TDRs may have multiple types of concessions, but are presented only once in the first modification type based on the order presented in the table above. The reported amounts include loans remodified of $545 million and $394 million for the quarters ended September 30, 2018 and 2017 and $1.4 billion and $1.7 billion , for the first nine months of 2018 and 2017 respectively. (2) Principal modifications include principal forgiveness at the time of the modification, contingent principal forgiveness granted over the life of the loan based on borrower performance, and principal that has been legally separated and deferred to the end of the loan, with a zero percent contractual interest rate. (3) Other concessions include loans discharged in bankruptcy, loan renewals, term extensions and other interest and noninterest adjustments, but exclude modifications that also forgive principal and/or reduce the contractual interest rate. (4) Charge-offs include write-downs of the investment in the loan in the period it is contractually modified. The amount of charge-off will differ from the modification terms if the loan has been charged down prior to the modification based on our policies. In addition, there may be cases where we have a charge-off/down with no legal principal modification. Modifications resulted in legally forgiving principal (actual, contingent or deferred) of $5 million and $4 million for the quarters ended September 30, 2018 and 2017 and $22 million and $23 million for the first nine months of 2018 and 2017 respectively. (5) Reflects the effect of reduced interest rates on loans with an interest rate concession as one of their concession types, which includes loans reported as a principal primary modification type that also have an interest rate concession. (6) Trial modifications are granted a delay in payments due under the original terms during the trial payment period. However, these loans continue to advance through delinquency status and accrue interest according to their original terms. Any subsequent permanent modification generally includes interest rate related concessions; however, the exact concession type and resulting financial effect are usually not known until the loan is permanently modified. Trial modifications for the period are presented net of previously reported trial modifications that became permanent in the current period.
Loans and Allowance for Credit Losses, Troubled Debt Restructuring, Current Defaults	Table 6.18 summarizes permanent modification TDRs that have defaulted in the current period within 12 months of their permanent modification date. We are reporting these defaulted TDRs based on a payment default definition of 90 days past due for the commercial portfolio segment and 60 days past due for the consumer portfolio segment. Table 6.18: Defaulted TDRs Recorded investment of defaults Quarter ended September 30, Nine months ended September 30, (in millions) 2018 2017 2018 2017 Commercial: Commercial and industrial $ 42 14 135 106 Real estate mortgage 35 16 75 47 Real estate construction — 4 16 4 Total commercial 77 34 226 157 Consumer: Real estate 1-4 family first mortgage 11 32 44 83 Real estate 1-4 family junior lien mortgage 3 5 10 14 Credit card 20 20 57 52 Automobile 4 4 11 11 Other revolving credit and installment 2 1 4 3 Total consumer 40 62 126 163 Total $ 117 96 352 320
Loans and Allowance for Credit Losses, Purchased Credit Impaired Loans, Loans Outstanding	Table 6.19 presents PCI loans net of any remaining purchase accounting adjustments. Real estate 1-4 family first mortgage PCI loans are predominantly Pick-a-Pay loans. Table 6.19: PCI Loans (in millions) Sep 30, Dec 31, Total commercial $ 45 86 Consumer: Real estate 1-4 family first mortgage 6,878 12,722 Real estate 1-4 family junior lien mortgage 18 27 Total consumer 6,896 12,749 Total PCI loans (carrying value) $ 6,941 12,835 Total PCI loans (unpaid principal balance) $ 10,126 18,975
Loans and Allowance for Credit Losses, Purchased Credit Impaired Loans, Accretable Yield	The change in the accretable yield related to PCI loans since the merger with Wachovia is presented in Table 6.20 . Changes during third quarter 2018 reflect the impact of the sale of $1.7 billion of Pick-a-Pay PCI loans. Table 6.20: Change in Accretable Yield (in millions) Quarter Nine months 2009-2017 Balance, beginning of period $ 5,733 8,887 10,447 Change in accretable yield due to acquisitions — — 161 Accretion into interest income (1) (279 ) (892 ) (16,983 ) Accretion into noninterest income due to sales (2) (638 ) (1,760 ) (801 ) Reclassification from nonaccretable difference for loans with improving credit-related cash flows 3 402 11,597 Changes in expected cash flows that do not affect nonaccretable difference (3) (410 ) (2,228 ) 4,466 Balance, end of period $ 4,409 4,409 8,887 (1) Includes accretable yield released as a result of settlements with borrowers, which is included in interest income. (2) Includes accretable yield released as a result of sales to third parties, which is included in noninterest income. (3) Represents changes in cash flows expected to be collected due to the impact of modifications, changes in prepayment assumptions, changes in interest rates on variable rate PCI loans and sales to third parties.
Loans and Allowance for Credit Losses, Purchased Credit Impaired Loans by Credit Quality Indicator	Table 6.21 provides a breakdown of commercial PCI loans by risk category. Table 6.21: Commercial PCI Loans by Risk Category (in millions) Total September 30, 2018 By risk category: Pass $ 2 Criticized 43 Total commercial PCI loans $ 45 December 31, 2017 By risk category: Pass $ 8 Criticized 78 Total commercial PCI loans $ 86
Loans and Allowance for Credit Losses, Purchased Credit Impaired Loans by Delinquency Status, Commercial	Table 6.22 provides past due information for commercial PCI loans. Table 6.22: Commercial PCI Loans by Delinquency Status (in millions) Total September 30, 2018 By delinquency status: Current-29 DPD and still accruing $ 44 30-89 DPD and still accruing 1 90+ DPD and still accruing — Total commercial PCI loans $ 45 December 31, 2017 By delinquency status: Current-29 DPD and still accruing $ 86 30-89 DPD and still accruing — 90+ DPD and still accruing — Total commercial PCI loans $ 86
Loans and Allowance for Credit Losses, Purchased Credit Impaired Loans by Delinquency Status, Consumer	Table 6.23 provides the delinquency status of consumer PCI loans. Table 6.23: Consumer PCI Loans by Delinquency Status September 30, 2018 December 31, 2017 (in millions) Real estate 1-4 family first mortgage Real estate 1-4 family junior lien mortgage Total Real estate 1-4 family first mortgage Real estate 1-4 family junior lien mortgage Total By delinquency status: Current-29 DPD and still accruing $ 7,322 127 7,449 13,127 138 13,265 30-59 DPD and still accruing 776 5 781 1,317 8 1,325 60-89 DPD and still accruing 409 3 412 622 3 625 90-119 DPD and still accruing 161 1 162 293 2 295 120-179 DPD and still accruing 91 1 92 219 2 221 180+ DPD and still accruing 518 3 521 1,310 4 1,314 Total consumer PCI loans (adjusted unpaid principal balance) $ 9,277 140 9,417 16,888 157 17,045 Total consumer PCI loans (carrying value) $ 6,878 18 6,896 12,722 27 12,749
Loans and Allowance for Credit Losses, Purchased Credit Impaired Loans by FICO Score, Consumer	Table 6.24 provides FICO scores for consumer PCI loans. Table 6.24: Consumer PCI Loans by FICO September 30, 2018 December 31, 2017 (in millions) Real estate 1-4 family first mortgage Real estate 1-4 family junior lien mortgage Total Real estate 1-4 family first mortgage Real estate 1-4 family junior lien mortgage Total By FICO: < 600 $ 2,070 29 2,099 4,014 37 4,051 600-639 1,026 18 1,044 2,086 20 2,106 640-679 1,222 21 1,243 2,393 24 2,417 680-719 1,266 24 1,290 2,242 29 2,271 720-759 1,091 22 1,113 1,779 23 1,802 760-799 654 11 665 933 12 945 800+ 426 6 432 468 6 474 No FICO available 1,522 9 1,531 2,973 6 2,979 Total consumer PCI loans (adjusted unpaid principal balance) $ 9,277 140 9,417 16,888 157 17,045 Total consumer PCI loans (carrying value) $ 6,878 18 6,896 12,722 27 12,749
Loans and Allowance for Credit Losses, Purchased Credit Impaired Loans by Loan to Value Ratio, Consumer	Table 6.25 shows the distribution of consumer PCI loans by LTV for real estate 1-4 family first mortgages and by CLTV for real estate 1-4 family junior lien mortgages. Table 6.25: Consumer PCI Loans by LTV/CLTV September 30, 2018 December 31, 2017 (in millions) Real estate 1-4 family first mortgage by LTV Real estate 1-4 family junior lien mortgage by CLTV Total Real estate 1-4 family first mortgage by LTV Real estate 1-4 family junior lien mortgage by CLTV Total By LTV/CLTV: 0-60% $ 5,281 47 5,328 8,010 45 8,055 60.01-80% 3,013 54 3,067 6,510 63 6,573 80.01-100% 822 28 850 1,975 35 2,010 100.01-120% (1) 133 8 141 319 10 329 > 120% (1) 28 1 29 73 3 76 No LTV/CLTV available — 2 2 1 1 2 Total consumer PCI loans (adjusted unpaid principal balance) $ 9,277 140 9,417 16,888 157 17,045 Total consumer PCI loans (carrying value) $ 6,878 18 6,896 12,722 27 12,749 (1) Reflects total loan balances with LTV/CLTV amounts in excess of 100%. In the event of default, the loss content would generally be limited to only the amount in excess of 100% LTV/CLTV.

Equity Securities (Tables)

Equity Securities (Tables)	9 Months Ended
	Sep. 30, 2018
Equity Securities [Abstract]
Equity Securities	Table 7.1 provides a summary of our equity securities by business purpose and accounting model, including equity securities with readily determinable fair values (marketable) and those without readily determinable fair values (nonmarketable). Table 7.1: Equity Securities Sep 30, Dec 31, (in millions) 2018 2017 Held for trading at fair value: Marketable equity securities $ 26,138 30,004 Not held for trading: Fair value: Marketable equity securities (1) 5,705 4,356 Nonmarketable equity securities (2) 6,479 4,867 Total equity securities at fair value 12,184 9,223 Equity method: LIHTC (3) 10,453 10,269 Private equity 3,838 3,839 Tax-advantaged renewable energy 1,967 1,950 New market tax credit and other 259 294 Total equity method 16,517 16,352 Other: Federal bank stock and other at cost (4) 5,467 5,828 Private equity (5) 1,449 1,090 Total equity securities not held for trading 35,617 32,493 Total equity securities $ 61,755 62,497 (1) Includes $3.6 billion and $3.7 billion at September 30, 2018 , and December 31, 2017 , respectively, related to securities held as economic hedges of our deferred compensation plan obligations. (2) Includes $6.3 billion and $4.9 billion at September 30, 2018 , and December 31, 2017 , respectively, related to investments for which we elected the fair value option. See Note 15 (Fair Value of Assets and Liabilities) for additional information. (3) Represents low-income housing tax credit investments. (4) Includes $5.4 billion at both September 30, 2018 , and December 31, 2017 , related to investments in Federal Reserve Bank and Federal Home Loan Bank stock. (5) Represents nonmarketable equity securities for which we have elected to account for the security under the measurement alternative.
Net Gains (Losses) from Equity Securities	Table 7.2 provides a summary of the net gains and losses for equity securities. Gains and losses for securities held for trading are reported in net gains from trading activities. Table 7.2: Net Gains (Losses) from Equity Securities Quarter ended September 30, Nine months ended September 30, (in millions) 2018 2017 2018 2017 Net gains (losses) from equity securities carried at fair value: Marketable equity securities $ 103 231 139 701 Nonmarketable equity securities 822 514 1,525 1,208 Total equity securities carried at fair value 925 745 1,664 1,909 Net gains (losses) from nonmarketable equity securities not carried at fair value: Impairment write-downs (45 ) (83 ) (302 ) (181 ) Net unrealized gains related to measurement alternative observable transactions 51 — 314 — Net realized gains on sale 204 175 1,101 565 All other — 16 34 78 Total nonmarketable equity securities not carried at fair value 210 108 1,147 462 Net losses from economic hedge derivatives (1) (719 ) (490 ) (1,317 ) (1,164 ) Total net gains from equity securities $ 416 363 1,494 1,207 (1) Includes net gains (losses) on derivatives not designated as hedging instruments.
Measurement Alternative	Table 7.3 provides additional information about the impairment write-downs and observable price adjustments related to nonmarketable equity securities accounted for under the measurement alternative. Gains and losses related to these adjustments are also included in Table 7.2. Table 7.3: Measurement Alternative Quarter ended September 30, Nine months ended September 30, (in millions) 2018 2018 Net gains (losses) recognized in earnings during the period: Gross unrealized gains due to observable price changes $ 68 339 Gross unrealized losses due to observable price changes (17 ) (25 ) Impairment write-downs (6 ) (18 ) Realized net gains from sale 186 277 Total net gains recognized during the period $ 231 573

Other Assets (Tables)

Other Assets (Tables)	9 Months Ended
	Sep. 30, 2018
Other Assets [Abstract]
Components of Other Assets	Table 8.1 presents the components of other assets. Table 8.1: Other Assets (in millions) Sep 30, Dec 31, Corporate/bank-owned life insurance $ 19,677 19,549 Accounts receivable (1) 32,965 39,127 Interest receivable 5,986 5,688 Core deposit intangibles 192 769 Customer relationship and other amortized intangibles 620 841 Foreclosed assets: Residential real estate: Government insured/guaranteed (1) 87 120 Non-government insured/guaranteed 230 252 Non-residential real estate 205 270 Operating lease assets 9,329 9,666 Due from customers on acceptances 257 177 Other 8,700 13,785 Total other assets $ 78,248 90,244 (1) Certain government-guaranteed residential real estate mortgage loans upon foreclosure are included in Accounts receivable. Both principal and interest related to these foreclosed real estate assets are collectible because the loans were predominantly insured by the FHA or guaranteed by the VA. For more information on the classification of certain government-guaranteed mortgage loans upon foreclosure, see Note 1 (Summary of Significant Accounting Policies) to Financial Statements in our 2017 10-K.

Securitizations and Variable _2

Securitizations and Variable Interest Entities (Tables)	9 Months Ended
	Sep. 30, 2018
Securitizations and Variable Interest Entities [Abstract]
Balance Sheet Transactions With VIEs	Table 9.1 provides the classifications of assets and liabilities in our balance sheet for our transactions with VIEs. Table 9.1: Balance Sheet Transactions with VIEs (in millions) VIEs that we do not consolidate VIEs that we consolidate Transfers that we account for as secured borrowings Total September 30, 2018 Cash $ — 112 — 112 Interest-earning deposits with banks — 8 — 8 Debt securities: Trading debt securities 1,973 — 200 2,173 Available-for-sale debt securities (1) 2,806 — 338 3,144 Held-to-maturity debt securities 499 — — 499 Loans 1,504 12,749 96 14,349 Mortgage servicing rights 15,930 — — 15,930 Derivative assets 43 — — 43 Equity securities 10,572 61 — 10,633 Other assets — 210 7 217 Total assets 33,327 13,140 641 47,108 Short-term borrowings — — 512 512 Derivative liabilities 92 — (2) — 92 Accrued expenses and other liabilities 242 154 (2) 9 405 Long-term debt 3,428 871 (2) 97 4,396 Total liabilities 3,762 1,025 618 5,405 Noncontrolling interests — 37 — 37 Net assets $ 29,565 12,078 23 41,666 December 31, 2017 Cash $ — 116 — 116 Interest-earning deposits with banks — 371 — 371 Debt securities: Trading debt securities 1,305 — 201 1,506 Available-for-sale debt securities (1) 3,288 — 358 3,646 Held-to-maturity debt securities 485 — — 485 Loans 4,274 12,482 110 16,866 Mortgage servicing rights 13,628 — — 13,628 Derivative assets 44 — — 44 Equity securities 10,740 306 — 11,046 Other assets — 342 6 348 Total assets 33,764 13,617 675 48,056 Short-term borrowings — — 522 522 Derivative liabilities 106 5 (2) — 111 Accrued expenses and other liabilities 244 132 (2) 10 386 Long-term debt 3,590 1,479 (2) 111 5,180 Total liabilities 3,940 1,616 643 6,199 Noncontrolling interests — 283 — 283 Net assets $ 29,824 11,718 32 41,574 (1) Excludes certain debt securities related to loans serviced for the Federal National Mortgage Association (FNMA), Federal Home Loan Mortgage Corporation (FHLMC) and GNMA. (2) There were no VIE liabilities with recourse to the general credit of Wells Fargo for the periods presented.
Unconsolidated VIEs	Table 9.2 provides a summary of unconsolidated VIEs with which we have significant continuing involvement, but we are not the primary beneficiary. We do not consider our continuing involvement in an unconsolidated VIE to be significant when it relates to third-party sponsored VIEs for which we were not the transferor (unless we are servicer and have other significant forms of involvement) or if we were the sponsor only or sponsor and servicer but do not have any other forms of significant involvement. Significant continuing involvement includes transactions where we were the sponsor or transferor and have other significant forms of involvement. Sponsorship includes transactions with unconsolidated VIEs where we solely or materially participated in the initial design or structuring of the entity or marketing of the transaction to investors. When we transfer assets to a VIE and account for the transfer as a sale, we are considered the transferor. We consider investments in securities (other than those held temporarily in trading), loans, guarantees, liquidity agreements, written options and servicing of collateral to be other forms of involvement that may be significant. We have excluded certain transactions with unconsolidated VIEs from the balances presented in the following table where we have determined that our continuing involvement is not significant due to the temporary nature and size of our variable interests, because we were not the transferor or because we were not involved in the design of the unconsolidated VIEs. We also exclude from the table secured borrowing transactions with unconsolidated VIEs (for information on these transactions, see the Transactions with Consolidated VIEs and Secured Borrowings section in this Note). Table 9.2: Unconsolidated VIEs Carrying value – asset (liability) (in millions) Total VIE assets Debt and equity interests (1) Servicing assets Derivatives Other commitments and guarantees Net assets September 30, 2018 Residential mortgage loan securitizations: Conforming (2) $ 1,174,883 2,291 14,998 — (185 ) 17,104 Other/nonconforming 11,158 458 60 — — 518 Commercial mortgage securitizations 151,503 2,463 872 (92 ) (37 ) 3,206 Collateralized debt obligations: Debt securities 681 — — 5 (20 ) (15 ) Loans (3) — — — — — — Asset-based finance structures 445 330 — — — 330 Tax credit structures 31,547 11,511 — — (3,428 ) 8,083 Collateralized loan obligations 2 — — — — — Investment funds 221 51 — — — 51 Other (4) 1,738 250 — 38 — 288 Total $ 1,372,178 17,354 15,930 (49 ) (3,670 ) 29,565 Maximum exposure to loss Debt and equity interests (1) Servicing assets Derivatives Other commitments and guarantees Total exposure Residential mortgage loan securitizations: Conforming $ 2,291 14,998 — 1,146 18,435 Other/nonconforming 458 60 — — 518 Commercial mortgage securitizations 2,463 872 92 10,954 14,381 Collateralized debt obligations: Debt securities — — 5 20 25 Loans (3) — — — — — Asset-based finance structures 330 — — 71 401 Tax credit structures 11,511 — — 1,140 12,651 Collateralized loan obligations — — — — — Investment funds 51 — — — 51 Other (4) 250 — 55 157 462 Total $ 17,354 15,930 152 13,488 46,924 (continued on following page) (continued from previous page) Carrying value – asset (liability) (in millions) Total VIE assets Debt and equity interests (1) Servicing assets Derivatives Other commitments and guarantees Net assets December 31, 2017 Residential mortgage loan securitizations: Conforming (2) $ 1,169,410 2,100 12,665 — (190 ) 14,575 Other/nonconforming 14,175 598 73 — — 671 Commercial mortgage securitizations 144,650 2,198 890 28 (34 ) 3,082 Collateralized debt obligations: Debt securities 1,031 — — 5 (20 ) (15 ) Loans (3) 1,481 1,443 — — — 1,443 Asset-based finance structures 2,333 1,867 — — — 1,867 Tax credit structures 31,852 11,258 — — (3,590 ) 7,668 Collateralized loan obligations 23 1 — — — 1 Investment funds 225 50 — — — 50 Other (4) 2,257 577 — (95 ) — 482 Total $ 1,367,437 20,092 13,628 (62 ) (3,834 ) 29,824 Maximum exposure to loss Debt and equity interests (1) Servicing assets Derivatives Other commitments and guarantees Total exposure Residential mortgage loan securitizations: Conforming $ 2,100 12,665 — 1,137 15,902 Other/nonconforming 598 73 — — 671 Commercial mortgage securitizations 2,198 890 42 10,202 13,332 Collateralized debt obligations: Debt securities — — 5 20 25 Loans (3) 1,443 — — — 1,443 Asset-based finance structures 1,867 — — 71 1,938 Tax credit structures 11,258 — — 1,175 12,433 Collateralized loan obligations 1 — — — 1 Investment funds 50 — — — 50 Other (4) 577 — 120 157 854 Total $ 20,092 13,628 167 12,762 46,649 (1) Includes total equity interests of $10.6 billion and $10.7 billion at September 30, 2018 , and December 31, 2017 , respectively. Also includes debt interests in the form of both loans and securities. Excludes certain debt securities held related to loans serviced for FNMA, FHLMC and GNMA. (2) Excludes assets and related liabilities with a recorded carrying value on our balance sheet of $1.0 billion and $2.2 billion at September 30, 2018 , and December 31, 2017 , respectively, for certain delinquent loans that are eligible for repurchase from GNMA loan securitizations. The recorded carrying value represents the amount that would be payable if the Company was to exercise the repurchase option. The carrying amounts are excluded from the table because the loans eligible for repurchase do not represent interests in the VIEs. (3) Represents senior loans to trusts that are collateralized by asset-backed securities. The trusts invested in senior tranches from a diversified pool of U.S. asset securitizations, of which all were current and 100% were rated as investment grade by the primary rating agencies at December 31, 2017 . These senior loans were accounted for at amortized cost and were subject to the Company’s allowance and credit charge-off policies. The securitization was terminated in first quarter 2018. (4) Includes structured financing and credit-linked note structures. Also contains investments in auction rate securities (ARS) issued by VIEs that we do not sponsor and, accordingly, are unable to obtain the total assets of the entity.
Cash Flows from Sales and Securitization Activity	Table 9.3 presents the cash flows for our transfers accounted for as sales. Table 9.3: Cash Flows From Sales and Securitization Activity 2018 2017 (in millions) Mortgage loans Other financial assets Mortgage loans Other financial assets Quarter ended September 30, Proceeds from securitizations and whole loan sales $ 53,792 — 61,756 — Fees from servicing rights retained 812 — 826 — Cash flows from other interests held (1) 221 — 408 — Repurchases of assets/loss reimbursements (2): Non-agency securitizations and whole loan transactions 2 — 5 — Agency securitizations (3) 17 — 20 — Servicing advances, net of repayments (24 ) — (90 ) — Nine months ended September 30, Proceeds from securitizations and whole loan sales $ 156,369 — 172,837 25 Fees from servicing rights retained 2,487 — 2,520 — Cash flows from other interests held (1) 574 1 1,883 — Repurchases of assets/loss reimbursements (2): Non-agency securitizations and whole loan transactions 4 — 12 — Agency securitizations (3) 69 — 66 — Servicing advances, net of repayments (67 ) — (252 ) — (1) Cash flows from other interests held include principal and interest payments received on retained bonds and excess cash flows received on interest-only strips. (2) Consists of cash paid to repurchase loans from investors and cash paid to investors to reimburse them for losses on individual loans that are already liquidated. (3) Represent loans repurchased from GNMA, FNMA, and FHLMC under representation and warranty provisions included in our loan sales contracts. Third quarter and first nine months of 2018 exclude $1.5 billion and $ 6.2 billion , respectively, in delinquent insured/guaranteed loans that we service and have exercised our option to purchase out of GNMA pools, compared with $2.1 billion and $6.0 billion , respectively, in the same periods of 2017 . These loans are predominantly insured by the FHA or guaranteed by the VA.
Residential Mortgage Servicing Rights	Table 9.4 presents the key weighted-average assumptions we used to measure residential mortgage servicing rights at the date of securitization. Table 9.4: Residential Mortgage Servicing Rights Residential mortgage servicing rights 2018 2017 Quarter ended September 30, Prepayment speed (1) 11.2 % 12.1 Discount rate 7.6 6.9 Cost to service ($ per loan) (2) $ 128 122 Nine months ended September 30, Prepayment speed (1) 10.5 % 11.7 Discount rate 7.4 6.9 Cost to service ($ per loan) (2) $ 130 135 (1) The prepayment speed assumption for residential mortgage servicing rights includes a blend of prepayment speeds and default rates. Prepayment speed assumptions are influenced by mortgage interest rate inputs as well as our estimation of drivers of borrower behavior. (2) Includes costs to service and unreimbursed foreclosure costs, which can vary period to period depending on the mix of modified government-guaranteed loans sold to GNMA.
Retained Interests from Unconsolidated VIEs	Table 9.5 provides key economic assumptions and the sensitivity of the current fair value of residential mortgage servicing rights and other interests held to immediate adverse changes in those assumptions. “Other interests held” relate to residential and commercial mortgage loan securitizations. Residential mortgage-backed securities retained in securitizations issued through GSEs, such as FNMA, FHLMC and GNMA, are excluded from the table because these securities have a remote risk of credit loss due to the GSE guarantee. These securities also have economic characteristics similar to GSE mortgage-backed securities that we purchase, which are not included in the table. Subordinated interests include only those bonds whose credit rating was below AAA by a major rating agency at issuance. Senior interests include only those bonds whose credit rating was AAA by a major rating agency at issuance. The information presented excludes trading positions held in inventory. Table 9.5: Retained Interests from Unconsolidated VIEs Other interests held Residential mortgage servicing rights (1) Interest-only strips Commercial (2) ($ in millions, except cost to service amounts) Subordinated bonds Senior bonds Fair value of interests held at September 30, 2018 $ 15,980 17 677 270 Expected weighted-average life (in years) 6.9 3.8 6.8 5.3 Key economic assumptions: Prepayment speed assumption (3) 9.0 % 16.8 Decrease in fair value from: 10% adverse change $ 572 1 25% adverse change 1,361 1 Discount rate assumption 7.2 % 14.7 4.1 3.8 Decrease in fair value from: 100 basis point increase $ 727 — 37 12 200 basis point increase 1,386 1 71 23 Cost to service assumption ($ per loan) 129 Decrease in fair value from: 10% adverse change 442 25% adverse change 1,100 Credit loss assumption 4.9 % — Decrease in fair value from: 10% higher losses $ 2 — 25% higher losses 5 — Fair value of interests held at December 31, 2017 $ 13,625 19 596 468 Expected weighted-average life (in years) 6.2 3.3 6.7 5.2 Key economic assumptions: Prepayment speed assumption (3) 10.5 % 20.0 Decrease in fair value from: 10% adverse change $ 565 1 25% adverse change 1,337 2 Discount rate assumption 6.9 % 14.8 4.1 3.1 Decrease in fair value from: 100 basis point increase $ 652 — 32 20 200 basis point increase 1,246 1 61 39 Cost to service assumption ($ per loan) 143 Decrease in fair value from: 10% adverse change 467 25% adverse change 1,169 Credit loss assumption 1.8 % — Decrease in fair value from: 10% higher losses $ — — 25% higher losses — — (1) See narrative following this table for a discussion of commercial mortgage servicing rights. (2) Prepayment speed assumptions do not significantly impact the value of commercial mortgage securitization bonds as the underlying commercial mortgage loans experience significantly lower prepayments due to certain contractual restrictions, impacting the borrower’s ability to prepay the mortgage. (3) The prepayment speed assumption for residential mortgage servicing rights includes a blend of prepayment speeds and default rates. Prepayment speed assumptions are influenced by mortgage interest rate inputs as well as our estimation of drivers of borrower behavior.
Off-Balance Sheet Loans Sold Or Securitized	Table 9.6 presents information about the principal balances of off-balance sheet loans that were sold or securitized, including residential mortgage loans sold to FNMA, FHLMC, GNMA and other investors, for which we have some form of continuing involvement (including servicer). Delinquent loans include loans 90 days or more past due and loans in bankruptcy, regardless of delinquency status. For loans sold or securitized where servicing is our only form of continuing involvement, we would only experience a loss if we were required to repurchase a delinquent loan or foreclosed asset due to a breach in representations and warranties associated with our loan sale or servicing contracts. Table 9.6: Off-Balance Sheet Loans Sold or Securitized Net charge-offs Total loans Delinquent loans and foreclosed assets (1) Nine months ended September 30, (in millions) Sep 30, 2018 Dec 31, 2017 Sep 30, 2018 Dec 31, 2017 2018 2017 Commercial: Real estate mortgage $ 102,384 100,875 1,997 2,839 244 718 Total commercial 102,384 100,875 1,997 2,839 244 718 Consumer: Real estate 1-4 family first mortgage 1,110,568 1,126,208 9,863 13,393 368 546 Total consumer 1,110,568 1,126,208 9,863 13,393 368 546 Total off-balance sheet sold or securitized loans (2) $ 1,212,952 1,227,083 11,860 16,232 612 1,264 (1) Includes $1.3 billion and $1.2 billion of commercial foreclosed assets and $656 million and $879 million of consumer foreclosed assets at September 30, 2018 , and December 31, 2017 , respectively. (2) At September 30, 2018 , and December 31, 2017 , the table includes total loans of $1.1 trillion at both dates, delinquent loans of $6.6 billion and $9.1 billion , and foreclosed assets of $455 million and $619 million , respectively, for FNMA, FHLMC and GNMA. Net charge-offs exclude loans sold to FNMA, FHLMC and GNMA as we do not service or manage the underlying real estate upon foreclosure and, as such, do not have access to net charge-off information.
Transactions With Consolidated VIEs And Secured Borrowings	Table 9.7 presents a summary of financial assets and liabilities for asset transfers accounted for as secured borrowings and involvements with consolidated VIEs. Carrying values of “Assets” are presented using GAAP measurement methods, which may include fair value, credit impairment or other adjustments, and therefore in some instances will differ from “Total VIE assets.” For VIEs that obtain exposure synthetically through derivative instruments, the remaining notional amount of the derivative is included in “Total VIE assets.” On the consolidated balance sheet, we separately disclose the consolidated assets of certain VIEs that can only be used to settle the liabilities of those VIEs. Table 9.7: Transactions with Consolidated VIEs and Secured Borrowings Carrying value (in millions) Total VIE assets Assets Liabilities Noncontrolling interests Net assets September 30, 2018 Secured borrowings: Municipal tender option bond securitizations $ 647 545 (521 ) — 24 Residential mortgage securitizations 99 96 (97 ) — (1 ) Total secured borrowings 746 641 (618 ) — 23 Consolidated VIEs: Commercial and industrial loans and leases 7,571 7,546 (447 ) (13 ) 7,086 Nonconforming residential mortgage loan securitizations 2,127 1,873 (576 ) — 1,297 Commercial real estate loans 3,648 3,648 — — 3,648 Structured asset finance — — — — — Investment funds 61 61 (1 ) (18 ) 42 Other 12 12 (1 ) (6 ) 5 Total consolidated VIEs 13,419 13,140 (1,025 ) (37 ) 12,078 Total secured borrowings and consolidated VIEs $ 14,165 13,781 (1,643 ) (37 ) 12,101 December 31, 2017 Secured borrowings: Municipal tender option bond securitizations $ 658 565 (532 ) — 33 Residential mortgage securitizations 113 110 (111 ) — (1 ) Total secured borrowings 771 675 (643 ) — 32 Consolidated VIEs: Commercial and industrial loans and leases 9,116 8,626 (915 ) (29 ) 7,682 Nonconforming residential mortgage loan securitizations 2,515 2,212 (694 ) — 1,518 Commercial real estate loans 2,378 2,378 — — 2,378 Structured asset finance 10 6 (4 ) — 2 Investment funds 305 305 (2 ) (230 ) 73 Other 100 90 (1 ) (24 ) 65 Total consolidated VIEs 14,424 13,617 (1,616 ) (283 ) 11,718 Total secured borrowings and consolidated VIEs $ 15,195 14,292 (2,259 ) (283 ) 11,750

Mortgage Banking Activities (Ta

Mortgage Banking Activities (Tables)	9 Months Ended
	Sep. 30, 2018
Mortgage Banking Activities [Abstract]
Analysis of Changes in Fair Value MSRs	Table 10.1 presents the changes in MSRs measured using the fair value method. Table 10.1: Analysis of Changes in Fair Value MSRs Quarter ended Sep 30, Nine months ended Sep 30, (in millions) 2018 2017 2018 2017 Fair value, beginning of period $ 15,411 12,789 13,625 12,959 Purchases — 541 — 541 Servicing from securitizations or asset transfers (1) 502 605 1,561 1,624 Sales and other (2) (2 ) 64 (7 ) 9 Net additions 500 1,210 1,554 2,174 Changes in fair value: Due to changes in valuation model inputs or assumptions: Mortgage interest rates (3) 582 (171 ) 2,211 (324 ) Servicing and foreclosure costs (4) (9 ) 60 55 73 Discount rates (5) (9 ) — (9 ) — Prepayment estimates and other (6) (33 ) (31 ) (51 ) (77 ) Net changes in valuation model inputs or assumptions 531 (142 ) 2,206 (328 ) Changes due to collection/realization of expected cash flows over time (462 ) (519 ) (1,405 ) (1,467 ) Total changes in fair value 69 (661 ) 801 (1,795 ) Fair value, end of period $ 15,980 13,338 15,980 13,338 (1) Includes impacts associated with exercising our right to repurchase delinquent loans from GNMA loan securitization pools. (2) Includes sales and transfers of MSRs, which can result in an increase of total reported MSRs if the sales or transfers are related to nonperforming loan portfolios or portfolios with servicing liabilities. (3) Includes prepayment speed changes as well as other valuation changes due to changes in mortgage interest rates (such as changes in estimated interest earned on custodial deposit balances). (4) Includes costs to service and unreimbursed foreclosure costs. (5) Reflects discount rate assumption change, excluding portion attributable to changes in mortgage interest rates. (6) Represents changes driven by other valuation model inputs or assumptions including prepayment speed estimation changes and other assumption updates. Prepayment speed estimation changes are influenced by observed changes in borrower behavior and other external factors that occur independent of interest rate changes.
Analysis of Changes in Amortized MSRs	Table 10.2 presents the changes in amortized MSRs. Table 10.2: Analysis of Changes in Amortized MSRs Quarter ended Sep 30, Nine months ended Sep 30, (in millions) 2018 2017 2018 2017 Balance, beginning of period $ 1,407 1,399 1,424 1,406 Purchases 42 31 82 75 Servicing from securitizations or asset transfers 33 41 106 123 Amortization (68 ) (65 ) (198 ) (198 ) Balance, end of period (1) $ 1,414 1,406 1,414 1,406 Fair value of amortized MSRs: Beginning of period $ 2,309 1,989 2,025 1,956 End of period 2,389 1,990 2,389 1,990 (1) Commercial amortized MSRs are evaluated for impairment purposes by the following risk strata: agency (GSEs) for multi-family properties and non-agency. There was no valuation allowance recorded for the periods presented on the commercial amortized MSRs.
Managed Servicing Portfolio	We present the components of our managed servicing portfolio in Table 10.3 at unpaid principal balance for loans serviced and subserviced for others and at book value for owned loans serviced. Table 10.3: Managed Servicing Portfolio (in billions) Sep 30, 2018 Dec 31, 2017 Residential mortgage servicing: Serviced for others $ 1,184 1,209 Owned loans serviced 337 342 Subserviced for others 5 3 Total residential servicing 1,526 1,554 Commercial mortgage servicing: Serviced for others 529 495 Owned loans serviced 121 127 Subserviced for others 9 9 Total commercial servicing 659 631 Total managed servicing portfolio $ 2,185 2,185 Total serviced for others $ 1,713 1,704 Ratio of MSRs to related loans serviced for others 1.02 % 0.88
Mortgage Banking Noninterest Income	Table 10.4 presents the components of mortgage banking noninterest income. Table 10.4: Mortgage Banking Noninterest Income Quarter ended Sep 30, Nine months ended Sep 30, (in millions) 2018 2017 2018 2017 Servicing income, net: Servicing fees: Contractually specified servicing fees $ 880 889 2,697 2,696 Late charges 40 41 126 133 Ancillary fees 49 51 136 160 Unreimbursed direct servicing costs (1) (79 ) (186 ) (258 ) (430 ) Net servicing fees 890 795 2,701 2,559 Changes in fair value of MSRs carried at fair value: Due to changes in valuation model inputs or assumptions (2) (A) 531 (142 ) 2,206 (328 ) Changes due to collection/realization of expected cash flows over time (462 ) (519 ) (1,405 ) (1,467 ) Total changes in fair value of MSRs carried at fair value 69 (661 ) 801 (1,795 ) Amortization (68 ) (65 ) (198 ) (198 ) Net derivative gains (losses) from economic hedges (3) (B) (501 ) 240 (2,040 ) 599 Total servicing income, net 390 309 1,264 1,165 Net gains on mortgage loan origination/sales activities 456 737 1,286 2,257 Total mortgage banking noninterest income $ 846 1,046 2,550 3,422 Market-related valuation changes to MSRs, net of hedge results (2)(3) (A)+(B) $ 30 98 166 271 (1) Includes costs associated with foreclosures, unreimbursed interest advances to investors, and other interest costs. (2) Refer to the analysis of changes in fair value MSRs presented in Table 10.1 in this Note for more detail. (3) Represents results from economic hedges used to hedge the risk of changes in fair value of MSRs. See Note 14 (Derivatives Not Designated as Hedging Instruments) for additional discussion and detail.
Analysis of Changes in Liability for Mortgage Loan Repurchase Losses	Table 10.5 summarizes the changes in our liability for mortgage loan repurchase losses. This liability is in “Accrued expenses and other liabilities” in our consolidated balance sheet and adjustments to the repurchase liability are recorded in net gains on mortgage loan origination/sales activities in “Mortgage banking” in our consolidated income statement. Because of the uncertainty in the various estimates underlying the mortgage repurchase liability, there is a range of losses in excess of the recorded mortgage repurchase liability that is reasonably possible. The estimate of the range of possible loss for representations and warranties does not represent a probable loss, and is based on currently available information, significant judgment, and a number of assumptions that are subject to change. The high end of this range of reasonably possible losses exceeded our recorded liability by $201 million at September 30, 2018 , and was determined based upon modifying the assumptions (particularly to assume significant changes in investor repurchase demand practices) used in our best estimate of probable loss to reflect what we believe to be the high end of reasonably possible adverse assumptions. Table 10.5: Analysis of Changes in Liability for Mortgage Loan Repurchase Losses Quarter ended Sep 30, Nine months ended Sep 30, (in millions) 2018 2017 2018 2017 Balance, beginning of period $ 179 178 181 229 Assumed with MSR purchases (1) — 10 — 10 Provision for repurchase losses: Loan sales 5 6 12 20 Change in estimate (2) (4 ) (12 ) (5 ) (65 ) Net additions (reductions) to provision 1 (6 ) 7 (45 ) Losses (2 ) (3 ) (10 ) (15 ) Balance, end of period $ 178 179 178 179 (1) Represents repurchase liability associated with portfolio of loans underlying mortgage servicing rights acquired during the period. (2) Results from changes in investor demand and mortgage insurer practices, credit deterioration and changes in the financial stability of correspondent lenders.

Intangible Assets (Tables)

Intangible Assets (Tables)	9 Months Ended
	Sep. 30, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Gross Carrying Value of Intangible Assets And Accumulated Amortization	Table 11.1 presents the gross carrying value of intangible assets and accumulated amortization. Table 11.1: Intangible Assets September 30, 2018 December 31, 2017 (in millions) Gross carrying value Accumulated amortization Net carrying value Gross carrying value Accumulated amortization Net carrying value Amortized intangible assets (1): MSRs (2) $ 4,064 (2,650 ) 1,414 3,876 (2,452 ) 1,424 Core deposit intangibles 12,834 (12,642 ) 192 12,834 (12,065 ) 769 Customer relationship and other intangibles 3,997 (3,377 ) 620 3,994 (3,153 ) 841 Total amortized intangible assets $ 20,895 (18,669 ) 2,226 20,704 (17,670 ) 3,034 Unamortized intangible assets: MSRs (carried at fair value) (2) $ 15,980 13,625 Goodwill 26,425 26,587 Trademark 14 14 (1) Excludes fully amortized intangible assets. (2) See Note 10 (Mortgage Banking Activities) for additional information on MSRs.
Amortization Expense for Intangible Assets	Table 11.2 provides the current year and estimated future amortization expense for amortized intangible assets. We based our projections of amortization expense shown below on existing asset balances at September 30, 2018 . Future amortization expense may vary from these projections. Table 11.2: Amortization Expense for Intangible Assets (in millions) Amortized MSRs Core deposit intangibles Customer relationship and other intangibles (1) Total Nine months ended September 30, 2018 (actual) $ 198 577 224 999 Estimate for the remainder of 2018 $ 67 192 75 334 Estimate for year ended December 31, 2019 247 — 117 364 2020 220 — 97 317 2021 189 — 83 272 2022 168 — 69 237 2023 141 — 59 200 (1) The nine months ended September 30, 2018 balance includes $7 million for lease intangible amortization.
Allocation of Goodwill to Operating Segments	Table 11.3 shows the allocation of goodwill to our reportable operating segments. Table 11.3: Goodwill (in millions) Community Banking Wholesale Banking Wealth and Investment Management Consolidated Company December 31, 2016 $ 16,849 8,585 1,259 26,693 Reclassification of goodwill held for sale to other assets — (116 ) — (116 ) Reduction in goodwill related to divested businesses and other — (20 ) — (20 ) Goodwill from business combinations — — 24 24 September 30, 2017 (1) $ 16,849 8,449 1,283 26,581 December 31, 2017 $ 16,849 8,455 1,283 26,587 Reclassification of goodwill held for sale to other assets (155 ) — — (155 ) Reduction in goodwill related to divested businesses and other (6 ) (1 ) — (7 ) September 30, 2018 (1) $ 16,688 8,454 1,283 26,425 (1) At September 30, 2017, other assets included Goodwill classified as held-for-sale of $116 million related to the sales agreement for Wells Fargo Insurance Services USA (and related businesses) and Wells Fargo Shareowner Services. At September 30, 2018, other assets included Goodwill classified as held-for-sale of $12 million related to the branch divestitures announced in June 2018.

Guarantees, Pledged Assets an_2

Guarantees, Pledged Assets and Collateral (Tables)	9 Months Ended
	Sep. 30, 2018
Guarantees [Abstract]
Guarantees - Carrying Value and Maximum Exposure to Loss	Table 12.1 shows carrying value, maximum exposure to loss on our guarantees and the related non-investment grade amounts. Table 12.1: Guarantees – Carrying Value and Maximum Exposure to Loss Maximum exposure to loss (in millions) Carrying value of obligation (asset) Expires in one year or less Expires after one year through three years Expires after three years through five years Expires after five years Total Non- investment grade September 30, 2018 Standby letters of credit (1) $ 36 14,051 8,024 3,051 476 25,602 8,025 Securities lending and other indemnifications (2) — — — — 1,454 1,454 — Written put options (3) (486 ) 14,420 11,122 2,876 702 29,120 16,703 Loans and MLHFS sold with recourse (4) 50 148 654 1,178 9,540 11,520 8,587 Factoring guarantees (5) — 978 — — — 978 891 Other guarantees 1 3 — 3 2,781 2,787 4 Total guarantees $ (399 ) 29,600 19,800 7,108 14,953 71,461 34,210 December 31, 2017 Standby letters of credit (1) $ 39 15,357 7,908 3,068 645 26,978 8,773 Securities lending and other indemnifications (2) — — — 2 809 811 2 Written put options (3) (455 ) 14,758 12,706 3,890 1,038 32,392 19,087 Loans and MLHFS sold with recourse (4) 51 165 533 934 9,385 11,017 8,155 Factoring guarantees (5) — 747 — — — 747 668 Other guarantees 1 7 — 2 4,175 4,184 7 Total guarantees $ (364 ) 31,034 21,147 7,896 16,052 76,129 36,692 (1) Total maximum exposure to loss includes direct pay letters of credit (DPLCs) of $7.2 billion and $8.1 billion at September 30, 2018 , and December 31, 2017 , respectively. We issue DPLCs to provide credit enhancements for certain bond issuances. Beneficiaries (bond trustees) may draw upon these instruments to make scheduled principal and interest payments, redeem all outstanding bonds because a default event has occurred, or for other reasons as permitted by the agreement. We also originate multipurpose lending commitments under which borrowers have the option to draw on the facility in one of several forms, including as a standby letter of credit. Total maximum exposure to loss includes the portion of these facilities for which we have issued standby letters of credit under the commitments. (2) Includes indemnifications provided to certain third-party clearing agents. Outstanding customer obligations under these arrangements were $115 million and $92 million with related collateral of $1.3 billion and $717 million at September 30, 2018 , and December 31, 2017 , respectively. Estimated maximum exposure to loss was $1.5 billion at September 30, 2018 and $809 million at December 31, 2017 . (3) Written put options, which are in the form of derivatives, are also included in the derivative disclosures in Note 14 (Derivatives). Carrying value net asset position is a result of certain deferred premium option trades. (4) Represent recourse provided, predominantly to the GSEs, on loans sold under various programs and arrangements. Under these arrangements, we repurchased $1 million and $2 million of loans associated with these agreements in both the third quarter and first nine months of 2018 , and $1 million and $3 million in the same periods of 2017 , respectively. (5) Consists of guarantees made under certain factoring arrangements to purchase trade receivables from third parties, generally upon their request, if receivable debtors default on their payment obligations.
Pledged Assets	Table 12.2 provides the total carrying amount of pledged assets by asset type and pledged off-balance sheet securities for securities financings. The table excludes pledged consolidated VIE assets of $13.1 billion and $13.6 billion at September 30, 2018 , and December 31, 2017 , respectively, which can only be used to settle the liabilities of those entities. The table also excludes $641 million and $675 million in assets pledged in transactions with VIE's accounted for as secured borrowings at September 30, 2018 , and December 31, 2017 , respectively. See Note 9 (Securitizations and Variable Interest Entities) for additional information on consolidated VIE assets and secured borrowings. Table 12.2: Pledged Assets (in millions) Sep 30, Dec 31, Held for trading: Debt securities $ 94,862 96,993 Equity securities 10,996 12,161 Total pledged assets held for trading (1) 105,858 109,154 Not held for trading: Debt securities and other (2) 56,327 73,592 Mortgage loans held for sale and loans (3) 451,031 469,554 Total pledged assets not held for trading 507,358 543,146 Total pledged assets $ 613,216 652,300 (1) Consists of pledged assets held for trading of $47.2 billion and $41.9 billion at September 30, 2018 , and December 31, 2017 , respectively and off-balance sheet securities of $58.6 billion and $67.3 billion as of the same dates, respectively, that are pledged as collateral for repurchase agreements and other securities financings. Total pledged assets held for trading includes $105.8 billion and $109.0 billion at September 30, 2018 , and December 31, 2017 , respectively that permit the secured parties to sell or repledge the collateral. (2) Includes carrying value of $4.3 billion and $5.0 billion (fair value of $4.1 billion and $ 5.0 billion ) in collateral for repurchase agreements at September 30, 2018 , and December 31, 2017 , respectively, which are pledged under agreements that do not permit the secured parties to sell or repledge the collateral. Also includes $50 million and $64 million in collateral pledged under repurchase agreements at September 30, 2018 , and December 31, 2017 , respectively, that permit the secured parties to sell or repledge the collateral. Substantially all other pledged securities are pursuant to agreements that do not permit the secured party to sell or repledge the collateral. (3) Includes mortgage loans held for sale of $1.4 billion and $2.6 billion at September 30, 2018 , and December 31, 2017 , respectively. Substantially all of the total mortgage loans held for sale and loans are pledged under agreements that do not permit the secured parties to sell or repledge the collateral. Amounts exclude $1.0 billion and $2.2 billion at September 30, 2018 , and December 31, 2017 , respectively, of pledged loans recorded on our balance sheet representing certain delinquent loans that are eligible for repurchase from GNMA loan securitizations.
Offsetting - Resale and Repurchase Agreements	Table 12.3 presents resale and repurchase agreements subject to master repurchase agreements (MRA) and securities borrowing and lending agreements subject to master securities lending agreements (MSLA). We account for transactions subject to these agreements as collateralized financings, and those with a single counterparty are presented net on our balance sheet, provided certain criteria are met that permit balance sheet netting. Most transactions subject to these agreements do not meet those criteria and thus are not eligible for balance sheet netting. Collateral we pledged consists of non-cash instruments, such as securities or loans, and is not netted on the balance sheet against the related liability. Collateral we received includes securities or loans and is not recognized on our balance sheet. Collateral pledged or received may be increased or decreased over time to maintain certain contractual thresholds as the assets underlying each arrangement fluctuate in value. Generally, these agreements require collateral to exceed the asset or liability recognized on the balance sheet. The following table includes the amount of collateral pledged or received related to exposures subject to enforceable MRAs or MSLAs. While these agreements are typically over-collateralized, U.S. GAAP requires disclosure in this table to limit the reported amount of such collateral to the amount of the related recognized asset or liability for each counterparty. In addition to the amounts included in Table 12.3 , we also have balance sheet netting related to derivatives that is disclosed in Note 14 (Derivatives). Table 12.3: Offsetting – Resale and Repurchase Agreements (in millions) Sep 30, Dec 31, Assets: Resale and securities borrowing agreements Gross amounts recognized $ 114,914 121,135 Gross amounts offset in consolidated balance sheet (1) (14,371 ) (23,188 ) Net amounts in consolidated balance sheet (2) 100,543 97,947 Collateral not recognized in consolidated balance sheet (3) (99,699 ) (96,829 ) Net amount (4) $ 844 1,118 Liabilities: Repurchase and securities lending agreements Gross amounts recognized (5) $ 106,253 111,488 Gross amounts offset in consolidated balance sheet (1) (14,371 ) (23,188 ) Net amounts in consolidated balance sheet (6) 91,882 88,300 Collateral pledged but not netted in consolidated balance sheet (7) (91,580 ) (87,918 ) Net amount (8) $ 302 382 (1) Represents recognized amount of resale and repurchase agreements with counterparties subject to enforceable MRAs that have been offset in the consolidated balance sheet. (2) At September 30, 2018 , and December 31, 2017 , includes $83.4 billion and $78.9 billion , respectively, classified on our consolidated balance sheet in federal funds sold and securities purchased under resale agreements. Balance also includes securities purchased under long-term resale agreements (generally one year or more) classified in loans, which totaled $17.1 billion and $19.0 billion , at September 30, 2018 , and December 31, 2017 , respectively. (3) Represents the fair value of collateral we have received under enforceable MRAs or MSLAs, limited for table presentation purposes to the amount of the recognized asset due from each counterparty. At September 30, 2018 , and December 31, 2017 , we have received total collateral with a fair value of $124.1 billion and $130.8 billion , respectively, all of which, we have the right to sell or repledge. These amounts include securities we have sold or repledged to others with a fair value of $60.4 billion at September 30, 2018 , and $66.3 billion at December 31, 2017 . (4) Represents the amount of our exposure that is not collateralized and/or is not subject to an enforceable MRA or MSLA. (5) For additional information on underlying collateral and contractual maturities, see the “Repurchase and Securities Lending Agreements” section in this Note. (6) Amount is classified in short-term borrowings on our consolidated balance sheet. (7) Represents the fair value of collateral we have pledged, related to enforceable MRAs or MSLAs, limited for table presentation purposes to the amount of the recognized liability owed to each counterparty. At September 30, 2018 , and December 31, 2017 , we have pledged total collateral with a fair value of $108.7 billion and $113.6 billion , respectively, of which, the counterparty does not have the right to sell or repledge $4.3 billion as of September 30, 2018 and $5.2 billion as of December 31, 2017 . (8) Represents the amount of our obligation that is not covered by pledged collateral and/or is not subject to an enforceable MRA or MSLA.
Underlying Collateral Types of Gross Obligations and Contractual Maturities of Gross Obligations	Table 12.4 provides the underlying collateral types of our gross obligations under repurchase and securities lending agreements. Table 12.4: Underlying Collateral Types of Gross Obligations (in millions) Sep 30, Dec 31, Repurchase agreements: Securities of U.S. Treasury and federal agencies (1) $ 35,758 40,507 Securities of U.S. States and political subdivisions 68 92 Federal agency mortgage-backed securities (1) 45,153 45,336 Non-agency mortgage-backed securities 1,441 1,324 Corporate debt securities (1) 8,869 8,020 Asset-backed securities 2,128 2,034 Equity securities 793 838 Other (1) 1,424 1,602 Total repurchases 95,634 99,753 Securities lending: Securities of U.S. Treasury and federal agencies 192 186 Corporate debt securities 418 619 Equity securities (2) 9,947 10,930 Other 62 — Total securities lending 10,619 11,735 Total repurchases and securities lending $ 106,253 111,488 (1) Amounts for December 31, 2017 have been revised to conform with the current period classification of certain collateral. (2) Equity securities are generally exchange traded and either re-hypothecated under margin lending agreements or obtained through contemporaneous securities borrowing transactions with other counterparties. Table 12.5 provides the contractual maturities of our gross obligations under repurchase and securities lending agreements. Table 12.5: Contractual Maturities of Gross Obligations (in millions) Overnight/continuous Up to 30 days 30-90 days >90 days Total gross obligation September 30, 2018 Repurchase agreements $ 82,130 5,879 2,954 4,671 95,634 Securities lending 10,281 38 300 — 10,619 Total repurchases and securities lending (1) $ 92,411 5,917 3,254 4,671 106,253 December 31, 2017 Repurchase agreements $ 83,780 7,922 3,286 4,765 99,753 Securities lending 9,634 584 1,363 154 11,735 Total repurchases and securities lending (1) $ 93,414 8,506 4,649 4,919 111,488 (1) Securities lending is executed under agreements that allow either party to terminate the transaction without notice, while repurchase agreements have a term structure to them that technically matures at a point in time. The overnight/continuous repurchase agreements require election of both parties to roll the trade rather than the election to terminate the arrangement as in securities lending.

Derivatives (Tables)

Derivatives (Tables)	9 Months Ended
	Sep. 30, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Notional or Contractual Amounts and Fair Values of Derivatives	Table 14.1 presents the total notional or contractual amounts and fair values for our derivatives. Derivative transactions can be measured in terms of the notional amount, but this amount is not recorded on the balance sheet and is not, when viewed in isolation, a meaningful measure of the risk profile of the instruments. The notional amount is generally not exchanged but is used only as the basis on which interest and other payments are determined. Table 14.1: Notional or Contractual Amounts and Fair Values of Derivatives September 30, 2018 December 31, 2017 Notional or contractual amount Fair value Notional or contractual amount Fair value (in millions) Derivative assets Derivative liabilities Derivative Derivative Derivatives designated as hedging instruments Interest rate contracts (1) $ 184,332 2,471 650 209,677 2,492 1,092 Foreign exchange contracts (1) 35,136 737 1,221 34,135 1,482 1,137 Total derivatives designated as qualifying hedging instruments 3,208 1,871 3,974 2,229 Derivatives not designated as hedging instruments Economic hedges: Interest rate contracts (2) 181,607 166 375 220,558 159 201 Equity contracts 15,764 929 210 12,315 716 138 Foreign exchange contracts 14,288 115 116 15,976 78 309 Credit contracts – protection purchased 101 26 — 111 37 — Subtotal 1,236 701 990 648 Customer accommodation trading and other derivatives: Interest rate contracts 8,156,678 13,426 14,518 6,434,673 14,979 14,179 Commodity contracts 72,559 4,205 1,716 62,530 2,354 1,335 Equity contracts 229,905 6,894 8,514 213,750 6,291 8,363 Foreign exchange contracts 333,715 5,582 5,032 362,896 7,413 7,122 Credit contracts – protection sold 9,185 94 141 9,021 147 214 Credit contracts – protection purchased 17,973 134 177 17,406 207 208 Subtotal 30,335 30,098 31,391 31,421 Total derivatives not designated as hedging instruments 31,571 30,799 32,381 32,069 Total derivatives before netting 34,779 32,670 36,355 34,298 Netting (3) (22,968 ) (24,084 ) (24,127 ) (25,502 ) Total $ 11,811 8,586 12,228 8,796 (1) Notional amounts presented exclude $0 million and $500 million of interest rate contracts at September 30, 2018 , and December 31, 2017 , respectively, for certain derivatives that are combined for designation as a hedge in a single relationship. The notional amount for foreign exchange contracts at September 30, 2018 , and December 31, 2017 , excludes $11.3 billion and $13.5 billion , respectively, for certain derivatives that are combined for designation as a hedge on a single instrument. (2) Includes economic hedge derivatives used to hedge the risk of changes in the fair value of residential MSRs, MLHFS, loans, derivative loan commitments and other interests held. (3) Represents balance sheet netting of derivative asset and liability balances, related cash collateral and portfolio level counterparty valuation adjustments. See Table 14.2 for further information.
Gross Fair Values of Derivative Assets and Liabilities	Table 14.2 provides information on the gross fair values of derivative assets and liabilities, the balance sheet netting adjustments and the resulting net fair value amount recorded on our balance sheet, as well as the non-cash collateral associated with such arrangements. We execute substantially all of our derivative transactions under master netting arrangements and reflect all derivative balances and related cash collateral subject to enforceable master netting arrangements on a net basis within the balance sheet. The “Gross amounts recognized” column in the following table includes $31.4 billion and $29.2 billion of gross derivative assets and liabilities, respectively, at September 30, 2018 , and $30.0 billion and $29.9 billion , respectively, at December 31, 2017 , with counterparties subject to enforceable master netting arrangements that are carried on the balance sheet net of offsetting amounts. The remaining gross derivative assets and liabilities of $3.4 billion and $3.5 billion , respectively, at September 30, 2018 , and $6.4 billion and $4.4 billion , respectively, at December 31, 2017 , include those with counterparties subject to master netting arrangements for which we have not assessed the enforceability because they are with counterparties where we do not currently have positions to offset, those subject to master netting arrangements where we have not been able to confirm the enforceability and those not subject to master netting arrangements. As such, we do not net derivative balances or collateral within the balance sheet for these counterparties. We determine the balance sheet netting adjustments based on the terms specified within each master netting arrangement. We disclose the balance sheet netting amounts within the column titled “Gross amounts offset in consolidated balance sheet.” Balance sheet netting adjustments are determined at the counterparty level for which there may be multiple contract types. For disclosure purposes, we allocate these netting adjustments to the contract type for each counterparty proportionally based upon the “Gross amounts recognized” by counterparty. As a result, the net amounts disclosed by contract type may not represent the actual exposure upon settlement of the contracts. We do not net non-cash collateral that we receive and pledge on the balance sheet. For disclosure purposes, we present the fair value of this non-cash collateral in the column titled “Gross amounts not offset in consolidated balance sheet (Disclosure-only netting)” within the table. We determine and allocate the Disclosure-only netting amounts in the same manner as balance sheet netting amounts. The “Net amounts” column within Table 14.2 represents the aggregate of our net exposure to each counterparty after considering the balance sheet and Disclosure-only netting adjustments. We manage derivative exposure by monitoring the credit risk associated with each counterparty using counterparty specific credit risk limits, using master netting arrangements and obtaining collateral. Derivative contracts executed in over-the-counter markets include bilateral contractual arrangements that are not cleared through a central clearing organization but are typically subject to master netting arrangements. The percentage of our bilateral derivative transactions outstanding at period end in such markets, based on gross fair value, is provided within the following table. Other derivative contracts executed in over-the-counter or exchange-traded markets are settled through a central clearing organization and are excluded from this percentage. In addition to the netting amounts included in the table, we also have balance sheet netting related to resale and repurchase agreements that are disclosed within Note 12 (Guarantees, Pledged Assets and Collateral, and Other Commitments). Table 14.2: Gross Fair Values of Derivative Assets and Liabilities (in millions) Gross amounts recognized Gross amounts offset in consolidated balance sheet (1) Net amounts in consolidated balance sheet Gross amounts not offset in consolidated balance sheet (Disclosure-only netting) (2) Net amounts Percent exchanged in over-the-counter market (3) September 30, 2018 Derivative assets Interest rate contracts $ 16,063 (10,905 ) 5,158 (104 ) 5,054 98 % Commodity contracts 4,205 (1,165 ) 3,040 (2 ) 3,038 92 Equity contracts 7,823 (5,646 ) 2,177 (494 ) 1,683 74 Foreign exchange contracts 6,434 (5,036 ) 1,398 (33 ) 1,365 100 Credit contracts – protection sold 94 (92 ) 2 — 2 13 Credit contracts – protection purchased 160 (124 ) 36 (2 ) 34 90 Total derivative assets $ 34,779 (22,968 ) 11,811 (635 ) 11,176 Derivative liabilities Interest rate contracts $ 15,543 (11,982 ) 3,561 (306 ) 3,255 98 % Commodity contracts 1,716 (823 ) 893 — 893 55 Equity contracts 8,724 (5,949 ) 2,775 (235 ) 2,540 84 Foreign exchange contracts 6,369 (5,023 ) 1,346 (61 ) 1,285 100 Credit contracts – protection sold 141 (140 ) 1 (1 ) — 84 Credit contracts – protection purchased 177 (167 ) 10 — 10 9 Total derivative liabilities $ 32,670 (24,084 ) 8,586 (603 ) 7,983 December 31, 2017 Derivative assets Interest rate contracts $ 17,630 (11,929 ) 5,701 (145 ) 5,556 99 % Commodity contracts 2,354 (966 ) 1,388 (4 ) 1,384 88 Equity contracts 7,007 (4,233 ) 2,774 (596 ) 2,178 76 Foreign exchange contracts 8,973 (6,656 ) 2,317 (25 ) 2,292 100 Credit contracts – protection sold 147 (145 ) 2 — 2 10 Credit contracts – protection purchased 244 (198 ) 46 (3 ) 43 89 Total derivative assets $ 36,355 (24,127 ) 12,228 (773 ) 11,455 Derivative liabilities Interest rate contracts $ 15,472 (13,226 ) 2,246 (1,078 ) 1,168 99 % Commodity contracts 1,335 (648 ) 687 (1 ) 686 76 Equity contracts 8,501 (4,041 ) 4,460 (400 ) 4,060 85 Foreign exchange contracts 8,568 (7,189 ) 1,379 (204 ) 1,175 100 Credit contracts – protection sold 214 (204 ) 10 (9 ) 1 85 Credit contracts – protection purchased 208 (194 ) 14 — 14 9 Total derivative liabilities $ 34,298 (25,502 ) 8,796 (1,692 ) 7,104 (1) Represents amounts with counterparties subject to enforceable master netting arrangements that have been offset in the consolidated balance sheet, including related cash collateral and portfolio level counterparty valuation adjustments. Counterparty valuation adjustments were $243 million and $245 million related to derivative assets and $108 million and $95 million related to derivative liabilities at September 30, 2018 , and December 31, 2017 , respectively. Cash collateral totaled $2.9 billion and $4.1 billion , netted against derivative assets and liabilities, respectively, at September 30, 2018 , and $2.7 billion and $4.2 billion , respectively, at December 31, 2017 . (2) Represents the fair value of non-cash collateral pledged and received against derivative assets and liabilities with the same counterparty that are subject to enforceable master netting arrangements. U.S. GAAP does not permit netting of such non-cash collateral balances in the consolidated balance sheet but requires disclosure of these amounts. (3) Represents derivatives executed in over-the-counter markets that are not settled through a central clearing organization. Over-the-counter percentages are calculated based on gross amounts recognized as of the respective balance sheet date. The remaining percentage represents derivatives settled through a central clearing organization, which are executed in either over-the-counter or exchange-traded markets.
Derivatives in Fair Value and Cash Flow Hedging Relationships	Table 14.3 shows the net gains (losses) related to derivatives in fair value and cash flow hedging relationships. Table 14.3: Gains (Losses) Recognized in Consolidated Statement of Income on Fair Value and Cash Flow Hedging Relationships Net interest income Noninterest income (in millions) Debt securities Loans Mortgage loans held for sale Deposits Long-term debt Other Total Quarter ended September 30, 2018 Total amounts presented in the consolidated statement of income $ 3,595 11,116 210 (1,499 ) (1,667 ) 633 12,388 Gains (losses) on fair value hedging relationships Interest contracts Amounts related to interest settlements on derivatives (1) (34 ) — (1 ) (10 ) 39 — (6 ) Recognized on derivatives 386 — 10 (58 ) (1,119 ) — (781 ) Recognized on hedged items (410 ) — (12 ) 61 1,101 — 740 Foreign exchange contracts Amounts related to interest settlements on derivatives (1)(2) 8 — — — (118 ) — (110 ) Recognized on derivatives (3) 2 — — — (58 ) (139 ) (195 ) Recognized on hedged items (3 ) — — — 126 139 262 Net income (expense) recognized on fair value hedges (51 ) — (3 ) (7 ) (29 ) — (90 ) Gains (losses) on cash flow hedging relationships Interest contracts Realized gains (losses) (pre-tax) reclassified from cumulative OCI into net income (4) — (78 ) — — — — (78 ) Foreign exchange contracts Realized gains (losses) (pre-tax) reclassified from cumulative OCI into net income (4) $ — — — — (1 ) — (1 ) Net income (expense) recognized on cash flow hedges $ — (78 ) — — (1 ) — (78 ) Nine months ended September 30, 2018 Total amounts presented in the consolidated statement of income $ 10,603 32,607 587 (3,857 ) (4,901 ) 1,720 36,759 Gains (losses) on fair value hedging relationships Interest contracts Amounts related to interest settlements on derivatives (1) (158 ) — (3 ) (35 ) 291 — 95 Recognized on derivatives 1,692 1 21 (248 ) (4,331 ) — (2,865 ) Recognized on hedged items (1,730 ) (1 ) (27 ) 233 4,215 — 2,690 Foreign exchange contracts Amounts related to interest settlements on derivatives (1)(2) 23 — — — (300 ) — (277 ) Recognized on derivatives (3) 8 — — — (132 ) (889 ) (1,013 ) Recognized on hedged items (5 ) — — — 153 820 968 Net income (expense) recognized on fair value hedges (170 ) — (9 ) (50 ) (104 ) (69 ) (402 ) Gains (losses) on cash flow hedging relationships Interest contracts Realized gains (losses) (pre-tax) reclassified from cumulative OCI into net income (4) — (215 ) — — — — (215 ) Foreign exchange contracts Realized gains (losses) (pre-tax) reclassified from cumulative OCI into net income (4) — — — — (1 ) — (1 ) Net income (expense) recognized on cash flow hedges $ — (215 ) — — (1 ) — (216 ) (continued on following page) (continued from previous page) Net interest income Noninterest income (in millions) Debt securities Loans Mortgage loans held for sale Deposits Long-term debt Other Total Quarter ended September 30, 2017 Total amounts presented in the consolidated statement of income $ 3,253 10,522 217 (869 ) (1,391 ) 199 11,931 Gains (losses) on fair value hedging relationships Interest contracts Amounts related to interest settlements on derivatives (1) (110 ) — (1 ) 25 246 — 160 Recognized on derivatives (6 ) — — 1 (162 ) — (167 ) Recognized on hedged items (5 ) — (2 ) — 164 — 157 Foreign exchange contracts Amounts related to interest settlements on derivatives (1)(2) 4 — — — (60 ) — (56 ) Recognized on derivatives (3) — — — — (32 ) 851 819 Recognized on hedged items — — — — 15 (790 ) (775 ) Net income (expense) recognized on fair value hedges (117 ) — (3 ) 26 171 61 138 Gains (losses) on cash flow hedging relationships Interest contracts Realized gains (losses) (pre-tax) reclassified from cumulative OCI into net income (4) — 107 — — (2 ) — 105 Foreign exchange contracts Realized gains (losses) (pre-tax) reclassified from cumulative OCI into net income (4) — — — — — — — Net income (expense) recognized on cash flow hedges $ — 107 — — (2 ) — 105 Nine months ended September 30, 2017 Total amounts presented in the consolidated statement of income $ 9,652 31,021 590 (2,082 ) (3,813 ) 1,045 36,413 Gains (losses) on fair value hedging relationships Interest contracts Amounts related to interest settlements on derivatives (1) (363 ) (1 ) (4 ) 29 1,041 — 702 Recognized on derivatives (167 ) — (11 ) 30 (325 ) — (473 ) Recognized on hedged items 121 — 4 (22 ) 322 — 425 Foreign exchange contracts Amounts related to interest settlements on derivatives (1)(2) 10 — — — (142 ) — (132 ) Recognized on derivatives (3) 11 — — — (187 ) 2,727 2,551 Recognized on hedged items (7 ) — — — 215 (2,485 ) (2,277 ) Net income (expense) recognized on fair value hedges (395 ) (1 ) (11 ) 37 924 242 796 Gains (losses) on cash flow hedging relationships Interest contracts Realized gains (losses) (pre-tax) reclassified from cumulative OCI into net income (4) — 468 — — (8 ) — 460 Foreign exchange contracts Realized gains (losses) (pre-tax) reclassified from cumulative OCI into net income (4) — — — — — — — Net income (expense) recognized on cash flow hedges $ — 468 — — (8 ) — 460 (1) Includes $11 million and $35 million for third quarter and first nine months of 2018, respectively, and includes $12 million and $22 million for the third quarter and first nine months of 2017, respectively which represents changes in fair value due to the passage of time associated with the non-zero fair value amount at hedge inception. (2) The third quarter and first nine months of 2018 included $(5) million and $(3) million , respectively, and the third quarter and first nine months of 2017 included $(1) million , and $(2) million , respectively, of the time value component recognized as net interest income (expense) on forward derivatives hedging foreign currency debt securities and long-term debt that were excluded from the assessment of hedge effectiveness. (3) For certain fair value hedges of foreign currency risk, changes in fair value of cross-currency swaps attributable to changes in cross-currency basis spreads are excluded from the assessment of hedge effectiveness and recorded in other comprehensive income. See Note 20 (Other Comprehensive Income) for the amounts recognized in other comprehensive income. (4) See Note 20 (Other Comprehensive Income) for details of amounts reclassified to net income.
Hedged Items in Fair Value Hedging Relationships	Table 14.4 shows the carrying amount and associated cumulative basis adjustment related to the application of hedge accounting that is included in the carrying amount of hedged assets and liabilities in fair value hedging relationships. Table 14.4: Hedged Items in Fair Value Hedging Relationship Hedged Items Currently Designated Hedged Items No Longer Designated (1) (in millions) Carrying Amount of Assets/(Liabilities) (2)(4) Hedge Accounting Basis Adjustment Assets/(Liabilities) (3) Carrying Amount of Assets/(Liabilities) (4) Hedge Accounting Basis Adjustment September 30, 2018 Available-for-sale debt securities (5) $ 29,736 (1,008 ) 4,947 261 Loans — — — — Mortgage loans held for sale 681 (6 ) — — Deposits (45,282 ) 383 — — Long-term debt (127,072 ) 2,223 (808 ) 10 December 31, 2017 Available-for-sale debt securities (5) 32,498 870 5,221 343 Loans 140 (1 ) — — Mortgage loans held for sale 465 (1 ) — — Deposits (23,679 ) 158 — — Long-term debt (128,950 ) (2,154 ) (1,953 ) 16 (1) Represents hedged items no longer designated in qualifying fair value hedging relationships for which an associated basis adjustment exists at the balance sheet date. (2) Does not include the carrying amount of hedged items where only foreign currency risk is the designated hedged risk. The carrying amount excluded for debt securities is $1.3 billion and $(6.4) billion for long-term debt as of September 30, 2018 and $1.5 billion for debt securities and for long-term debt is $(7.7) billion as of December 31, 2017. (3) The balance includes $1.5 billion and $49 million of debt securities and long-term debt cumulative basis adjustments as of September 30, 2018, respectively, and $2.1 billion and $297 million of debt securities and long-term debt cumulative basis adjustments as of December 31, 2017, respectively, on terminated hedges whereby the hedged items have subsequently been re-designated into existing hedges. (4) Represents the full carrying amount of the hedged asset or liability item as of the balance sheet date, except for circumstances in which only a portion of the asset or liability was designated as the hedged item in which case only the portion designated is presented. (5) Carrying amount represents the amortized cost.
Derivatives Not Designated as Hedging Instruments	Table 14.5 shows the net gains (losses) recognized by income statement lines, related to derivatives not designated as hedging instruments. Table 14.5: Gains (Losses) on Derivatives Not Designated as Hedging Instruments Noninterest income (in millions) Mortgage banking Net gains (losses) from equity securities Net gains (losses) from trading activities Other Total Quarter ended September 30, 2018 Net gains (losses) recognized on economic hedges derivatives: Interest contracts (1) $ (334 ) — — (1 ) (335 ) Equity contracts — (719 ) — 8 (711 ) Foreign exchange contracts — — — 78 78 Credit contracts — — — 4 4 Subtotal (2) (334 ) (719 ) — 89 (964 ) Net gains (losses) recognized on customer accommodation trading and other derivatives: Interest contracts (3) (67 ) — 298 (1 ) 230 Equity contracts — — (1,147 ) (112 ) (1,259 ) Foreign exchange contracts — — 258 — 258 Credit contracts — — (28 ) — (28 ) Commodity contracts — — 14 — 14 Other — — — — — Subtotal (67 ) — (605 ) (113 ) (785 ) Net gains (losses) recognized related to derivatives not designated as hedging instruments $ (401 ) (719 ) (605 ) (24 ) (1,749 ) Nine months ended September 30, 2018 Net gains (losses) recognized on economic hedges derivatives: Interest contracts (1) $ (1,114 ) — — 5 (1,109 ) Equity contracts — (1,317 ) — 13 (1,304 ) Foreign exchange contracts — — — 405 405 Credit contracts — — — (2 ) (2 ) Subtotal (2) (1,114 ) (1,317 ) — 421 (2,010 ) Net gains (losses) recognized on customer accommodation trading and other derivatives: Interest contracts (3) (372 ) — 865 (1 ) 492 Equity contracts — — (33 ) (378 ) (411 ) Foreign exchange contracts — — 659 — 659 Credit contracts — — (22 ) — (22 ) Commodity contracts — — 88 — 88 Other — — — — — Subtotal (372 ) — 1,557 (379 ) 806 Net gains (losses) recognized related to derivatives not designated as hedging instruments $ (1,486 ) (1,317 ) 1,557 42 (1,204 ) (continued on following page) (continued from previous page) Noninterest income (in millions) Mortgage banking Net gains (losses) from equity securities Net gains (losses) from trading activities Other Total Quarter ended September 30, 2017 Net gains (losses) recognized on economic hedges derivatives: Interest contracts (1) $ 138 — — (19 ) 119 Equity contracts — (490 ) — 1 (489 ) Foreign exchange contracts — — — (300 ) (300 ) Credit contracts — — — (6 ) (6 ) Subtotal (2) 138 (490 ) — (324 ) (676 ) Net gains (losses) recognized on customer accommodation trading and other derivatives: Interest contracts (3) 152 — 17 — 169 Equity contracts — — (851 ) — (851 ) Foreign exchange contracts — — 155 — 155 Credit contracts — — (31 ) — (31 ) Commodity contracts — — 63 — 63 Other — — — 8 8 Subtotal 152 — (647 ) 8 (487 ) Net gains (losses) recognized related to derivatives not designated as hedging instruments $ 290 (490 ) (647 ) (316 ) (1,163 ) Nine months ended September 30, 2017 Net gains (losses) recognized on economic hedges derivatives: Interest contracts (1) $ 480 — — (64 ) 416 Equity contracts — (1,164 ) — (11 ) (1,175 ) Foreign exchange contracts — — — (834 ) (834 ) Credit contracts — — — 8 8 Subtotal (2) 480 (1,164 ) — (901 ) (1,585 ) Net gains (losses) recognized on customer accommodation trading and other derivatives: Interest contracts (3) 599 — 80 — 679 Equity contracts — — (2,525 ) — (2,525 ) Foreign exchange contracts — — 356 — 356 Credit contracts — — (59 ) — (59 ) Commodity contracts — — 138 — 138 Other — — — 22 22 Subtotal 599 — (2,010 ) 22 (1,389 ) Net gains (losses) recognized related to derivatives not designated as hedging instruments $ 1,079 (1,164 ) (2,010 ) (879 ) (2,974 ) (1) Includes gains (losses) on the derivatives used as economic hedges of MSRs measured at fair value, derivative loan commitments and mortgage loans held for sale. (2) Includes hedging gains (losses) of $10 million and $46 million for the third quarter and first nine months of 2018, respectively, and $(18) million and $(64) million for the third quarter and first nine months of 2017, respectively, which partially offset hedge accounting ineffectiveness. (3) Amounts presented in mortgage banking noninterest income are gains on derivative loan commitments.
Sold and Purchased Credit Derivatives	Table 14.6 provides details of sold and purchased credit derivatives. Table 14.6: Sold and Purchased Credit Derivatives Notional amount (in millions) Fair value liability Protection sold (A) Protection sold – non- investment grade Protection purchased with identical underlyings (B) Net protection sold (A) - (B) Other protection purchased Range of maturities September 30, 2018 Credit default swaps on: Corporate bonds $ 23 1,906 391 1,266 640 1,300 2018 - 2027 Structured products 55 148 143 130 18 114 2022 - 2047 Credit protection on: Default swap index — 2,194 453 308 1,886 3,824 2018 - 2028 Commercial mortgage-backed securities index 53 402 122 375 27 51 2047 - 2058 Asset-backed securities index 9 43 43 42 1 1 2045 - 2046 Other 1 4,492 4,372 — 4,492 10,663 2018 - 2038 Total credit derivatives $ 141 9,185 5,524 2,121 7,064 15,953 December 31, 2017 Credit default swaps on: Corporate bonds $ 35 2,007 510 1,575 432 946 2018 - 2027 Structured products 86 267 252 232 35 153 2022 - 2047 Credit protection on: Default swap index — 2,626 540 308 2,318 3,932 2018 - 2027 Commercial mortgage-backed securities index 83 423 — 401 22 87 2047 - 2058 Asset-backed securities index 9 42 — 42 — 1 2045 - 2046 Other 1 3,656 3,306 — 3,656 9,840 2018 - 2031 Total credit derivatives $ 214 9,021 4,608 2,558 6,463 14,959

Fair Values of Assets and Lia_2

Fair Values of Assets and Liabilities (Tables)	9 Months Ended
	Sep. 30, 2018
Fair Value Disclosures [Abstract]
Fair Value, Measurements from Brokers or Third Party Pricing Services	Table 15.1 presents unadjusted fair value measurements provided by brokers or third-party pricing services by fair value hierarchy level. Fair value measurements obtained from brokers or third-party pricing services that we have adjusted to determine the fair value recorded in our financial statements are excluded from Table 15.1 . Table 15.1: Fair Value Measurements by Brokers or Third-Party Pricing Services Brokers Third-party pricing services (in millions) Level 1 Level 2 Level 3 Level 1 Level 2 Level 3 September 30, 2018 Trading debt securities $ — — — — 212 — Available-for-sale debt securities: Securities of U.S. Treasury and federal agencies — — — 3,267 2,920 — Securities of U.S. states and political subdivisions — — — — 47,382 40 Mortgage-backed securities — 27 — — 160,382 41 Other debt securities (1) — 423 967 — 44,451 48 Total available-for-sale debt securities — 450 967 3,267 255,135 129 Equity securities: Marketable — — — — 224 — Nonmarketable — — — — 1 46 Total equity securities — — — — 225 46 Derivative assets — — — 34 — — Derivative liabilities — — — (38 ) — — Other liabilities (2) — — — — — — December 31, 2017 Trading debt securities $ — — — 926 215 — Available-for-sale debt securities: Securities of U.S. Treasury and federal agencies — — — 3,389 2,930 — Securities of U.S. states and political subdivisions — — — — 50,401 49 Mortgage-backed securities — 33 — — 168,948 75 Other debt securities (1) — 307 1,158 — 44,465 22 Total available-for-sale debt securities — 340 1,158 3,389 266,744 146 Equity securities: Marketable — — — — 227 — Nonmarketable — — — — — — Total equity securities — — — — 227 — Derivative assets — — — 19 — — Derivative liabilities — — — (19 ) — — Other liabilities (2) — — — — — — (1) Includes corporate debt securities, collateralized loan and other debt obligations, asset-backed securities, and other debt securities. (2) Includes short sale liabilities and other liabilities.
Assets and Liabilities Recorded at Fair Value on a Recurring Basis	Table 15.2 presents the balances of assets and liabilities recorded at fair value on a recurring basis. Table 15.2: Fair Value on a Recurring Basis (in millions) Level 1 Level 2 Level 3 Netting Total September 30, 2018 Trading debt securities: Securities of U.S. Treasury and federal agencies $ 14,234 3,184 — — 17,418 Securities of U.S. states and political subdivisions — 3,215 3 — 3,218 Collateralized loan obligations — 772 263 — 1,035 Corporate debt securities — 11,826 35 — 11,861 Mortgage-backed securities — 30,662 — — 30,662 Asset-backed securities — 960 — — 960 Other trading debt securities — 17 17 — 34 Total trading debt securities 14,234 50,636 318 — 65,188 Available-for-sale debt securities: Securities of U.S. Treasury and federal agencies 3,267 2,920 — — 6,187 Securities of U.S. states and political subdivisions — 47,621 595 — 48,216 Mortgage-backed securities: Federal agencies — 153,511 — — 153,511 Residential — 2,966 — — 2,966 Commercial — 3,932 41 — 3,973 Total mortgage-backed securities — 160,409 41 — 160,450 Corporate debt securities 35 6,191 388 — 6,614 Collateralized loan and other debt obligations (1) — 35,351 843 — 36,194 Asset-backed securities: Automobile loans and leases — 547 — — 547 Home equity loans — 124 — — 124 Other asset-backed securities — 4,229 402 — 4,631 Total asset-backed securities — 4,900 402 — 5,302 Other debt securities — 1 — — 1 Total available-for-sale debt securities 3,302 257,393 2,269 (2) — 262,964 Mortgage loans held for sale — 12,905 980 — 13,885 Loans held for sale — 1,244 22 — 1,266 Loans — — 286 — 286 Mortgage servicing rights (residential) — — 15,980 — 15,980 Derivative assets: Interest rate contracts 19 15,996 48 — 16,063 Commodity contracts — 4,129 76 — 4,205 Equity contracts 2,022 4,306 1,495 — 7,823 Foreign exchange contracts 34 6,391 9 — 6,434 Credit contracts — 172 82 — 254 Netting — — — (22,968 ) (3) (22,968 ) Total derivative assets 2,075 30,994 1,710 (22,968 ) 11,811 Equity securities - excluding securities at NAV: Marketable 30,799 1,044 — — 31,843 Nonmarketable — 33 6,328 — 6,361 Total equity securities $ 30,799 1,077 6,328 — 38,204 Total assets included in the fair value hierarchy $ 50,410 354,249 27,893 (22,968 ) 409,584 Equity securities at NAV (4) 118 Total assets recorded at fair value $ 409,702 Derivative liabilities: Interest rate contracts $ (16 ) (15,371 ) (156 ) — (15,543 ) Commodity contracts — (1,701 ) (15 ) — (1,716 ) Equity contracts (1,411 ) (5,544 ) (1,769 ) — (8,724 ) Foreign exchange contracts (38 ) (6,301 ) (30 ) — (6,369 ) Credit contracts — (263 ) (55 ) — (318 ) Netting — — — 24,084 (3) 24,084 Total derivative liabilities (1,465 ) (29,180 ) (2,025 ) 24,084 (8,586 ) Short sale liabilities: Securities of U.S. Treasury and federal agencies (14,334 ) (609 ) — — (14,943 ) Mortgage-backed securities — (121 ) — — (121 ) Corporate debt securities — (5,416 ) — — (5,416 ) Equity securities (3,506 ) (5 ) — — (3,511 ) Other securities — (1 ) — — (1 ) Total short sale liabilities (17,840 ) (6,152 ) — — (23,992 ) Other liabilities — — (2 ) — (2 ) Total liabilities recorded at fair value $ (19,305 ) (35,332 ) (2,027 ) 24,084 (32,580 ) (1) Includes collateralized debt obligations of $843 million . (2) A significant portion of the balance consists of securities that are investment grade based on ratings received from the ratings agencies or internal credit grades categorized as investment grade if external ratings are not available. The securities are classified as Level 3 due to limited market activity. (3) Represents balance sheet netting of derivative asset and liability balances and related cash collateral. See Note 14 (Derivatives) for additional information. (4) Consists of certain nonmarketable equity securities that are measured at fair value using NAV per share (or its equivalent) as a practical expedient and are excluded from the fair value hierarchy. (continued on following page) (continued from previous page) (in millions) Level 1 Level 2 Level 3 Netting Total December 31, 2017 Trading debt securities: Securities of U.S. Treasury and federal agencies $ 12,491 2,383 — — 14,874 Securities of U.S. states and political subdivisions — 3,732 3 — 3,735 Collateralized loan obligations — 565 354 — 919 Corporate debt securities — 11,760 31 — 11,791 Mortgage-backed securities — 25,273 — — 25,273 Asset-backed securities — 993 — — 993 Other trading debt securities — 20 19 — 39 Total trading debt securities 12,491 44,726 407 — 57,624 Available-for-sale debt securities: Securities of U.S. Treasury and federal agencies 3,389 2,930 — — 6,319 Securities of U.S. states and political subdivisions — 50,401 925 — 51,326 Mortgage-backed securities: Federal agencies — 160,219 — — 160,219 Residential — 4,607 1 — 4,608 Commercial — 4,490 75 — 4,565 Total mortgage-backed securities — 169,316 76 — 169,392 Corporate debt securities 56 7,203 407 — 7,666 Collateralized loan and other debt obligations (1) — 35,036 1,020 — 36,056 Asset-backed securities: Automobile loans and leases — 553 — — 553 Home equity loans — 149 — — 149 Other asset-backed securities — 4,380 566 — 4,946 Total asset-backed securities — 5,082 566 — 5,648 Other debt securities — — — — — Total available-for-sale debt securities 3,445 269,968 2,994 (2) — 276,407 Mortgage loans held for sale — 15,118 998 — 16,116 Loans held for sale — 1,009 14 — 1,023 Loans — — 376 — 376 Mortgage servicing rights (residential) — — 13,625 — 13,625 Derivative assets: Interest rate contracts 17 17,479 134 — 17,630 Commodity contracts — 2,318 36 — 2,354 Equity contracts 1,698 3,970 1,339 — 7,007 Foreign exchange contracts 19 8,944 10 — 8,973 Credit contracts — 269 122 — 391 Netting — — — (24,127 ) (3) (24,127 ) Total derivative assets 1,734 32,980 1,641 (24,127 ) 12,228 Equity securities - excluding securities at NAV: Marketable 33,931 429 — — 34,360 Nonmarketable — 46 4,821 — 4,867 Total equity securities $ 33,931 475 4,821 — 39,227 Total assets included in the fair value hierarchy $ 51,601 364,276 24,876 (24,127 ) 416,626 Equity securities at NAV (4) — Total assets recorded at fair value $ 416,626 Derivative liabilities: Interest rate contracts $ (17 ) (15,392 ) (63 ) — (15,472 ) Commodity contracts — (1,318 ) (17 ) — (1,335 ) Equity contracts (1,313 ) (5,338 ) (1,850 ) — (8,501 ) Foreign exchange contracts (19 ) (8,546 ) (3 ) — (8,568 ) Credit contracts — (336 ) (86 ) — (422 ) Netting — — — 25,502 (3) 25,502 Total derivative liabilities (1,349 ) (30,930 ) (2,019 ) 25,502 (8,796 ) Short sale liabilities: Securities of U.S. Treasury and federal agencies (10,420 ) (568 ) — — (10,988 ) Corporate debt securities — (4,986 ) — — (4,986 ) Equity securities (2,168 ) (45 ) — — (2,213 ) Other securities — (285 ) — — (285 ) Total short sale liabilities (12,588 ) (5,884 ) — — (18,472 ) Other liabilities — — (3 ) — (3 ) Total liabilities recorded at fair value $ (13,937 ) (36,814 ) (2,022 ) 25,502 (27,271 ) (1) Includes collateralized debt obligations of $1.0 billion . (2) Balance primarily consists of securities that are investment grade based on ratings received from the ratings agencies or internal credit grades categorized as investment grade if external ratings are not available. The securities are classified as Level 3 due to limited market activity. (3) Represents balance sheet netting of derivative asset and liability balances and related cash collateral. See Note 14 (Derivatives) for additional information. (4) Consists of certain nonmarketable equity securities that are measured at fair value using NAV per share (or its equivalent) as a practical expedient and are excluded from the fair value hierarchy.
Fair Value, Assets and Liabilities Measured on Recurring Basis, Level 3 Reconciliation	Table 15.3: Changes in Level 3 Fair Value Assets and Liabilities on a Recurring Basis – Quarter ended September 30, 2018 Total net gains (losses) included in Purchases, sales, issuances and settlements, net (1) Net unrealized gains (losses) included in income related to assets and liabilities held at period end (in millions) Balance, beginning of period Net income Other compre- hensive income Transfers into Level 3 (2) Transfers out of Level 3 (3) Balance, end of period (4) Quarter ended September 30, 2018 Trading debt securities: Securities of U.S. states and political subdivisions $ 3 — — — — — 3 — Collateralized loan obligations 291 2 — (26 ) — (4 ) 263 1 Corporate debt securities 36 2 — 7 — (10 ) 35 2 Mortgage-backed securities — — — — — — — — Asset-backed securities — — — — — — — — Other trading debt securities 17 — — — — — 17 1 Total trading debt securities 347 4 — (19 ) — (14 ) 318 4 (5) Available-for-sale debt securities: Securities of U.S. states and political subdivisions 559 — (3 ) 39 — — 595 — Mortgage-backed securities: Residential — — 1 (1 ) — — — — Commercial 53 (1 ) — (11 ) — — 41 (1 ) Total mortgage-backed securities 53 (1 ) 1 (12 ) — — 41 (1 ) Corporate debt securities 443 2 (2 ) (55 ) — — 388 — Collateralized loan and other debt obligations 1,037 44 (33 ) (205 ) — — 843 — Asset-backed securities: Automobile loans and leases — — — — — — — — Other asset-backed securities 401 (4 ) (2 ) 7 — — 402 (3 ) Total asset-backed securities 401 (4 ) (2 ) 7 — — 402 (3 ) Total available-for-sale debt securities 2,493 41 (39 ) (226 ) — — 2,269 (4 ) (6) Mortgage loans held for sale 986 (12 ) — (8 ) 16 (2 ) 980 (12 ) (7) Loans held for sale 20 1 — 1 — — 22 — Loans 321 — — (35 ) — — 286 (5 ) (7) Mortgage servicing rights (residential)(8) 15,411 69 — 500 — — 15,980 531 (7) Net derivative assets and liabilities: Interest rate contracts (41 ) (103 ) — 36 — — (108 ) (43 ) Commodity contracts 26 29 — 6 — — 61 38 Equity contracts (339 ) (30 ) — 89 — 6 (274 ) (74 ) Foreign exchange contracts (15 ) (10 ) — 4 — — (21 ) (4 ) Credit contracts 24 5 — (2 ) — — 27 3 Other derivative contracts — — — — — — — — Total derivative contracts (345 ) (109 ) — 133 — 6 (315 ) (80 ) (9) Equity securities: Marketable — — — — — — — — Nonmarketable 5,806 817 — (295 ) — — 6,328 770 Total equity securities 5,806 817 — (295 ) — — 6,328 770 (10) Short sale liabilities — — — — — — — — (5) Other liabilities (2 ) — — — — — (2 ) — (7) (1) See Table 15.4 for detail. (2) All assets and liabilities transferred into level 3 were previously classified within level 2. (3) All assets and liabilities transferred out of level 3 are classified as level 2. (4) Represents only net gains (losses) that are due to changes in economic conditions and management’s estimates of fair value and excludes changes due to the collection/ realization of cash flows over time. (5) Included in net gains (losses) from trading activities in the income statement. (6) Included in net gains (losses) from debt securities in the income statement. (7) Included in mortgage banking and other noninterest income in the income statement. (8) For more information on the changes in mortgage servicing rights, see Note 10 (Mortgage Banking Activities). (9) Included in mortgage banking, trading activities, equity securities and other noninterest income in the income statement. (10) Included in net gains (losses) from equity securities in the income statement. (continued on following page) (continued from previous page) Table 15.4 presents gross purchases, sales, issuances and settlements related to the changes in Level 3 assets and liabilities measured at fair value on a recurring basis for the quarter ended September 30, 2018 . Table 15.4: Gross Purchases, Sales, Issuances and Settlements – Level 3 – Quarter ended September 30, 2018 (in millions) Purchases Sales Issuances Settlements Net Quarter ended September 30, 2018 Trading debt securities: Securities of U.S. states and political subdivisions $ — — — — — Collateralized loan obligations 75 (70 ) — (31 ) (26 ) Corporate debt securities 8 (1 ) — — 7 Mortgage-backed securities — — — — — Asset-backed securities — — — — — Other trading debt securities — — — — — Total trading debt securities 83 (71 ) — (31 ) (19 ) Available-for-sale debt securities: Securities of U.S. states and political subdivisions — — 69 (30 ) 39 Mortgage-backed securities: Residential — — — (1 ) (1 ) Commercial — — — (11 ) (11 ) Total mortgage-backed securities — — — (12 ) (12 ) Corporate debt securities — — — (55 ) (55 ) Collateralized loan and other debt obligations — (149 ) — (56 ) (205 ) Asset-backed securities: Automobile loans and leases — — — — — Other asset-backed securities — — 96 (89 ) 7 Total asset-backed securities — — 96 (89 ) 7 Total available-for-sale debt securities — (149 ) 165 (242 ) (226 ) Mortgage loans held for sale 17 (89 ) 104 (40 ) (8 ) Loans held for sale 1 — — — 1 Loans 2 — 5 (42 ) (35 ) Mortgage servicing rights (residential) (1) — (2 ) 502 — 500 Net derivative assets and liabilities: Interest rate contracts — — — 36 36 Commodity contracts — — — 6 6 Equity contracts 3 (37 ) — 123 89 Foreign exchange contracts — — — 4 4 Credit contracts 1 (2 ) — (1 ) (2 ) Other derivative contracts — — — — — Total derivative contracts 4 (39 ) — 168 133 Equity securities: Marketable — — — — — Nonmarketable — — — (295 ) (295 ) Total equity securities — — — (295 ) (295 ) Short sale liabilities — — — — — Other liabilities — — — — — (1) For more information on the changes in mortgage servicing rights, see Note 10 (Mortgage Banking Activities). The changes in Level 3 assets and liabilities measured at fair value on a recurring basis for the quarter ended September 30, 2017 , are presented in Table 15.5 . Table 15.5: Changes in Level 3 Fair Value Assets and Liabilities on a Recurring Basis – Quarter ended September 30, 2017 Balance, beginning of period Total net gains (losses) included in Purchases, sales, issuances and settlements, net (1) Net unrealized gains (losses) included in income related to assets and liabilities held at period end (in millions) Net income Other compre- hensive income Transfers into Level 3 (2) Transfers out of Level 3 (3) Balance, end of period (4) Quarter ended September 30, 2017 Trading debt securities: Securities of U.S. states and political subdivisions $ 9 — — (6 ) — — 3 — Collateralized loan obligations 403 — — (20 ) — — 383 (4 ) Corporate debt securities 26 — — 6 2 — 34 — Mortgage-backed securities — — — — — — — — Asset-backed securities — — — — — — — — Other trading debt securities 25 — — — — — 25 — Total trading debt securities 463 — — (20 ) 2 — 445 (4 ) (5) Available-for-sale debt securities: Securities of U.S. states and political subdivisions 1,557 3 3 (19 ) — (838 ) 706 — Mortgage-backed securities: Residential 1 — — — — — 1 — Commercial 75 — 1 — — — 76 — Total mortgage-backed securities 76 — 1 — — — 77 — Corporate debt securities 376 1 4 (1 ) — — 380 — Collateralized loan and other debt obligations 1,002 7 25 (20 ) — — 1,014 — Asset-backed securities: Automobile loans and leases — — — — — — — — Other asset-backed securities 872 1 2 (240 ) — — 635 — Total asset-backed securities 872 1 2 (240 ) — — 635 — Total available-for-sale debt securities 3,883 12 35 (280 ) — (838 ) 2,812 — (6) Mortgage loans held for sale 995 (10 ) — (6 ) 55 (2 ) 1,032 (11 ) (7) Loans held for sale 14 — — (1 ) 18 — 31 — Loans 443 — — (33 ) — — 410 (3 ) (7) Mortgage servicing rights (residential) (8) 12,789 (661 ) — 1,210 — — 13,338 (142 ) (7) Net derivative assets and liabilities: Interest rate contracts 115 158 — (159 ) — — 114 8 Commodity contracts 17 (16 ) — 9 2 — 12 7 Equity contracts (471 ) (70 ) — (27 ) (17 ) (6 ) (591 ) (130 ) Foreign exchange contracts 4 3 — — — — 7 1 Credit contracts 72 (6 ) — (13 ) — — 53 (6 ) Other derivative contracts (34 ) 8 — — — — (26 ) 8 Total derivative contracts (297 ) 77 — (190 ) (15 ) (6 ) (431 ) (112 ) (9) Equity securities: Marketable — — — — — — — — Nonmarketable 3,960 513 — — — — 4,473 513 Total equity securities 3,960 513 — — — — 4,473 513 (10) Short sale liabilities — — — (3 ) — — (3 ) — (5) Other liabilities (3 ) — — — — — (3 ) — (7) (1) See Table 15.6 for detail. (2) All assets and liabilities transferred into level 3 were previously classified within level 2. (3) All assets and liabilities transferred out of level 3 are classified as level 2. (4) Represents only net gains (losses) that are due to changes in economic conditions and management’s estimates of fair value and excludes changes due to the collection/realization of cash flows over time. (5) Included in net gains (losses) from trading activities in the income statement. (6) Included in net gains (losses) from debt securities in the income statement. (7) Included in mortgage banking and other noninterest income in the income statement. (8) For more information on the changes in mortgage servicing rights, see Note 10 (Mortgage Banking Activities). (9) Included in mortgage banking, trading activities, equity securities and other noninterest income in the income statement. (10) Included in net gains (losses) from equity securities in the income statement. (continued on following page) (continued from previous page) Table 15.6 presents gross purchases, sales, issuances and settlements related to the changes in Level 3 assets and liabilities measured at fair value on a recurring basis for the quarter ended September 30, 2017 . Table 15.6: Gross Purchases, Sales, Issuances and Settlements – Level 3 – Quarter ended September 30, 2017 (in millions) Purchases Sales Issuances Settlements Net Quarter ended September 30, 2017 Trading debt securities: Securities of U.S. states and political subdivisions $ 30 (35 ) — (1 ) (6 ) Collateralized loan obligations 51 (36 ) — (35 ) (20 ) Corporate debt securities 9 (3 ) — — 6 Mortgage-backed securities — — — — — Asset-backed securities — — — — — Other trading debt securities — — — — — Total trading debt securities 90 (74 ) — (36 ) (20 ) Available-for-sale debt securities: Securities of U.S. states and political subdivisions — (68 ) 98 (49 ) (19 ) Mortgage-backed securities: Residential — — — — — Commercial — — — — — Total mortgage-backed securities — — — — — Corporate debt securities — — — (1 ) (1 ) Collateralized loan and other debt obligations 6 — — (26 ) (20 ) Asset-backed securities: Automobile loans and leases — — — — — Other asset-backed securities — — 16 (256 ) (240 ) Total asset-backed securities — — 16 (256 ) (240 ) Total available-for-sale debt securities 6 (68 ) 114 (332 ) (280 ) Mortgage loans held for sale 17 (130 ) 147 (40 ) (6 ) Loans held for sale — (1 ) — — (1 ) Loans 2 — 5 (40 ) (33 ) Mortgage servicing rights (residential) (1) 541 64 605 — 1,210 Net derivative assets and liabilities: Interest rate contracts — — — (159 ) (159 ) Commodity contracts — — — 9 9 Equity contracts — (48 ) — 21 (27 ) Foreign exchange contracts — — — — — Credit contracts 1 — — (14 ) (13 ) Other derivative contracts — — — — — Total derivative contracts 1 (48 ) — (143 ) (190 ) Equity securities: Marketable — — — — — Nonmarketable — — — — — Total equity securities — — — — — Short sale liabilities — (3 ) — — (3 ) Other liabilities — — — — — (1) For more information on the changes in mortgage servicing rights, see Note 10 (Mortgage Banking Activities). The changes in Level 3 assets and liabilities measured at fair value on a recurring basis for the first nine months of 2018 , are presented in Table 15.7 . Table 15.7: Changes in Level 3 Fair Value Assets and Liabilities on a Recurring Basis – Nine months ended September 30, 2018 Total net gains (losses) included in Purchases, sales, issuances and settlements, net (1) Net unrealized gains (losses) included in income related to assets and liabilities held at period end (in millions) Balance, beginning of period Net income Other compre- hensive income Transfers into Level 3 (2) Transfers out of Level 3 (3) Balance, end of period (4) Nine months ended September 30, 2018 Trading debt securities: Securities of U.S. states and political subdivisions $ 3 — — — — — 3 — Collateralized loan obligations 354 (2 ) — (85 ) — (4 ) 263 — Corporate debt securities 31 2 — 13 — (11 ) 35 4 Mortgage-backed securities — — — — — — — — Asset-backed securities — — — — — — — — Other trading debt securities 19 (2 ) — — — — 17 — Total trading debt securities 407 (2 ) — (72 ) — (15 ) 318 4 (5) Available-for-sale debt securities: Securities of U.S. states and political subdivisions 925 5 (5 ) (51 ) — (279 ) 595 — Mortgage-backed securities: Residential 1 — — (1 ) — — — — Commercial 75 — (2 ) (32 ) — — 41 (2 ) Total mortgage-backed securities 76 — (2 ) (33 ) — — 41 (2 ) Corporate debt securities 407 4 2 (25 ) — — 388 — Collateralized loan and other debt obligations 1,020 55 20 (252 ) — — 843 — Asset-backed securities: Automobile loans and leases — — — — — — — — Other asset-backed securities 566 4 (10 ) (158 ) — — 402 (3 ) Total asset-backed securities 566 4 (10 ) (158 ) — — 402 (3 ) Total available-for-sale debt securities 2,994 68 5 (519 ) — (279 ) 2,269 (5 ) (6) Mortgage loans held for sale 998 (46 ) — (20 ) 56 (8 ) 980 (42 ) (7) Loans held for sale 14 2 — (15 ) 21 — 22 — Loans 376 (1 ) — (89 ) — — 286 (9 ) (7) Mortgage servicing rights (residential) (8) 13,625 801 — 1,554 — — 15,980 2,206 (7) Net derivative assets and liabilities: Interest rate contracts 71 (511 ) — 332 — — (108 ) (163 ) Commodity contracts 19 59 — (20 ) 3 — 61 60 Equity contracts (511 ) 27 — 153 — 57 (274 ) (67 ) Foreign exchange contracts 7 (35 ) — 7 — — (21 ) (23 ) Credit contracts 36 1 — (10 ) — — 27 (6 ) Other derivative contracts — — — — — — — — Total derivative contracts (378 ) (459 ) — 462 3 57 (315 ) (199 ) (9) Equity securities: Marketable — — — — — — — — Nonmarketable (10) 5,203 1,510 — (391 ) 10 (4 ) 6,328 1,457 Total equity securities 5,203 1,510 — (391 ) 10 (4 ) 6,328 1,457 (11) Short sale liabilities — — — — — — — — (5) Other liabilities (3 ) 1 — — — — (2 ) — (7) (1) See Table 15.8 for detail. (2) All assets and liabilities transferred into level 3 were previously classified within level 2. (3) All assets and liabilities transferred out of level 3 are classified as level 2. (4) Represents only net gains (losses) that are due to changes in economic conditions and management’s estimates of fair value and excludes changes due to the collection/realization of cash flows over time. (5) Included in net gains (losses) from trading activities in the income statement. (6) Included in net gains (losses) from debt securities in the income statement. (7) Included in mortgage banking and other noninterest income in the income statement. (8) For more information on the changes in mortgage servicing rights, see Note 10 (Mortgage Banking Activities). (9) Included in mortgage banking, trading activities, equity securities and other noninterest income in the income statement. (10) Beginning balance includes $382 million of auction rate securities, which changed from the cost to fair value method of accounting in connection with the adoption of ASU 2016-01 in first quarter 2018. (11) Included in net gains (losses) from equity securities in the income statement. (continued on following page) (continued from previous page) Table 15.8 presents gross purchases, sales, issuances and settlements related to the changes in Level 3 assets and liabilities measured at fair value on a recurring basis for the first nine months of 2018 . Table 15.8: Gross Purchases, Sales, Issuances and Settlements – Level 3 – Nine months ended September 30, 2018 (in millions) Purchases Sales Issuances Settlements Net Nine months ended September 30, 2018 Trading debt securities: Securities of U.S. states and political subdivisions $ — — — — — Collateralized loan obligations 346 (300 ) — (131 ) (85 ) Corporate debt securities 16 (3 ) — — 13 Mortgage-backed securities — — — — — Asset-backed securities — — — — — Other trading debt securities — — — — — Total trading debt securities 362 (303 ) — (131 ) (72 ) Available-for-sale debt securities: Securities of U.S. states and political subdivisions — (4 ) 79 (126 ) (51 ) Mortgage-backed securities: Residential — — — (1 ) (1 ) Commercial — — — (32 ) (32 ) Total mortgage-backed securities — — — (33 ) (33 ) Corporate debt securities 31 — — (56 ) (25 ) Collateralized loan and other debt obligations — (149 ) — (103 ) (252 ) Asset-backed securities: Automobile loans and leases — — — — — Other asset-backed securities — (8 ) 154 (304 ) (158 ) Total asset-backed securities — (8 ) 154 (304 ) (158 ) Total available-for-sale debt securities 31 (161 ) 233 (622 ) (519 ) Mortgage loans held for sale 64 (240 ) 271 (115 ) (20 ) Loans held for sale 1 (16 ) — — (15 ) Loans 3 — 13 (105 ) (89 ) Mortgage servicing rights (residential) (1) — (7 ) 1,561 — 1,554 Net derivative assets and liabilities: Interest rate contracts — — — 332 332 Commodity contracts — — — (20 ) (20 ) Equity contracts 3 (37 ) — 187 153 Foreign exchange contracts — — — 7 7 Credit contracts 9 (6 ) — (13 ) (10 ) Other derivative contracts — — — — — Total derivative contracts 12 (43 ) — 493 462 Equity securities: Marketable — — — — — Nonmarketable — (17 ) — (374 ) (391 ) Total equity securities — (17 ) — (374 ) (391 ) Short sale liabilities — — — — — Other liabilities — — — — — (1) For more information on the changes in mortgage servicing rights, see Note 10 (Mortgage Banking Activities). The changes in Level 3 assets and liabilities measured at fair value on a recurring basis for the first nine months of 2017 , are presented in Table 15.9 . Table 15.9: Changes in Level 3 Fair Value Assets and Liabilities on a Recurring Basis – Nine months ended September 30, 2017 Balance, beginning of period Total net gains (losses) included in Purchases, sales, issuances and settlements, net (1) Net unrealized gains (losses) included in income related to assets and liabilities held at period end (in millions) Net income Other compre- hensive income Transfers into Level 3 (2) Transfers out of Level 3 (3) Balance, end of period (4) Nine months ended September 30, 2017 Trading debt securities: Securities of U.S. states and $ 3 — — — — — 3 — Collateralized loan obligations 309 (3 ) — 77 — — 383 (12 ) Corporate debt securities 34 1 — (5 ) 5 (1 ) 34 — Mortgage-backed securities — — — — — — — — Asset-backed securities — — — — — — — — Other trading debt securities 28 (3 ) — — — — 25 (2 ) Total trading debt securities 374 (5 ) — 72 5 (1 ) 445 (14 ) (5) Available-for-sale debt securities: Securities of U.S. states and political subdivisions 1,140 4 7 884 5 (1,334 ) 706 — Mortgage-backed securities: Residential 1 — — — — — 1 — Commercial 91 (6 ) — (9 ) — — 76 (11 ) Total mortgage-backed securities 92 (6 ) — (9 ) — — 77 (11 ) Corporate debt securities 432 (13 ) 14 (53 ) — — 380 — Collateralized loan and other debt obligations 879 17 70 48 — — 1,014 — Asset-backed securities: Automobile loans and leases — — — — — — — — Other asset-backed securities 962 1 5 (333 ) — — 635 — Total asset-backed securities 962 1 5 (333 ) — — 635 — Total available-for-sale debt securities 3,505 3 96 537 5 (1,334 ) 2,812 (11 ) (6) Mortgage loans held for sale 985 (20 ) — (41 ) 116 (8 ) 1,032 (21 ) (7) Loans held for sale — — — (3 ) 34 — 31 — Loans 758 (6 ) — (342 ) — — 410 (9 ) (7) Mortgage servicing rights (residential) (8) 12,959 (1,795 ) — 2,174 — — 13,338 (328 ) (7) Net derivative assets and liabilities: Interest rate contracts 121 625 — (632 ) — — 114 (10 ) Commodity contracts 23 (14 ) — 3 2 (2 ) 12 9 Equity contracts (267 ) (128 ) — (70 ) (39 ) (87 ) (591 ) (223 ) Foreign exchange contracts 12 (5 ) — — — — 7 (1 ) Credit contracts 77 29 — (53 ) — — 53 (42 ) Other derivative contracts (47 ) 22 — (1 ) — — (26 ) 22 Total derivative contracts (81 ) 529 — (753 ) (37 ) (89 ) (431 ) (245 ) (9) Equity securities: Marketable — — — — — — — — Nonmarketable 3,259 1,214 — (1 ) 1 — 4,473 1,215 Total equity securities 3,259 1,214 — (1 ) 1 — 4,473 1,215 (10) Short sale liabilities — — — (3 ) — — (3 ) — (5) Other liabilities (4 ) 1 — — — — (3 ) — (7) (1) See Table 15.10 for detail. (2) All assets and liabilities transferred into level 3 were previously classified within level 2. (3) All assets and liabilities transferred out of level 3 are classified as level 2. (4) Represents only net gains (losses) that are due to changes in economic conditions and management’s estimates of fair value and excludes changes due to the collection/realization of cash flows over time. (5) Included in net gains (losses) from trading activities in the income statement. (6) Included in net gains (losses) from debt securities in the income statement. (7) Included in mortgage banking and other noninterest income in the income statement. (8) For more information on the changes in mortgage servicing rights, see Note 10 (Mortgage Banking Activities). (9) Included in mortgage banking, trading activities, equity securities and other noninterest income in the income statement. (10) Included in net gains (losses) from equity securities in the income statement. (continued on following page) (continued from previous page) Table 15.10 presents gross purchases, sales, issuances and settlements related to the changes in Level 3 assets and liabilities measured at fair value on a recurring basis for the first nine months of 2017 . Table 15.10: Gross Purchases, Sales, Issuances and Settlements – Level 3 – Nine months ended September 30, 2017 (in millions) Purchases Sales Issuances Settlements Net Nine months ended September 30, 2017 Trading debt securities: Securities of U.S. states and political subdivisions $ 37 (36 ) — (1 ) — Collateralized loan obligations 337 (165 ) — (95 ) 77 Corporate debt securities 18 (23 ) — — (5 ) Mortgage-backed securities — — — — — Asset-backed securities — — — — — Other trading debt securities — — — — — Total trading debt securities 392 (224 ) — (96 ) 72 Available-for-sale debt securities: Securities of U.S. states and political subdivisions — (68 ) 1,099 (147 ) 884 Mortgage-backed securities: Residential — — — — — Commercial — — — (9 ) (9 ) Total mortgage-backed securities — — — (9 ) (9 ) Corporate debt securities 4 — — (57 ) (53 ) Collateralized loan and other debt obligations 135 — — (87 ) 48 Asset-backed securities: Automobile loans and leases — — — — — Other asset-backed securities — — 198 (531 ) (333 ) Total asset-backed securities — — 198 (531 ) (333 ) Total available-for-sale debt securities 139 (68 ) 1,297 (831 ) 537 Mortgage loans held for sale 57 (374 ) 386 (110 ) (41 ) Loans held for sale — (1 ) — (2 ) (3 ) Loans 5 (129 ) 14 (232 ) (342 ) Mortgage servicing rights (residential) (1) 541 9 1,624 — 2,174 Net derivative assets and liabilities: Interest rate contracts — — — (632 ) (632 ) Commodity contracts — — — 3 3 Equity contracts — (117 ) — 47 (70 ) Foreign exchange contracts — — — — — Credit contracts 5 (2 ) — (56 ) (53 ) Other derivative contracts — — — (1 ) (1 ) Total derivative contracts 5 (119 ) — (639 ) (753 ) Equity securities: Marketable — — — — — Nonmarketable — (1 ) — — (1 ) Total equity securities — (1 ) — — (1 ) Short sale liabilities — (3 ) — — (3 ) Other liabilities — — — — — (1) For more information on the changes in mortgage servicing rights, see Note 10 (Mortgage Banking Activities).
Fair Value, Assets and Liabilities Measured on Recurring Basis, Quantitative Information about Valuation Techniques and Unobservable Inputs	Table 15.11: Valuation Techniques – Recurring Basis – September 30, 2018 ($ in millions, except cost to service amounts) Fair Value Level 3 Valuation Technique(s) Significant Unobservable Input Range of Inputs Weighted Average (1) September 30, 2018 Trading and available-for-sale debt securities: Securities of U.S. states and political subdivisions: Government, healthcare and other revenue bonds $ 549 Discounted cash flow Discount rate 2.2 - 6.3 % 3.1 Other municipal bonds 9 Discounted cash flow Discount rate 5.2 - 5.2 5.2 40 Vendor priced Collateralized loan and other debt obligations (2) 263 Market comparable pricing Comparability adjustment (12.0 ) - 17.8 2.3 843 Vendor priced Asset-backed securities: Diversified payment rights (3) 176 Discounted cash flow Discount rate 2.9 - 8.3 4.9 Other commercial and consumer 200 (4) Discounted cash flow Discount rate 4.4 - 5.9 4.6 Weighted average life 1.3 - 1.6 yrs 1.4 26 Vendor priced Mortgage loans held for sale (residential) 962 Discounted cash flow Default rate 0.0 - 8.6 % 0.9 Discount rate 1.1 - 7.2 5.9 Loss severity 0.0 - 45.2 25.0 Prepayment rate 2.8 - 12.8 5.0 18 Market comparable pricing Comparability adjustment (56.3 ) - (6.3 ) (38.1 ) Loans 286 (5) Discounted cash flow Discount rate 3.4 - 7.4 4.2 Prepayment rate 3.8 - 100.0 89.1 Loss severity 0.0 - 33.6 9.3 Mortgage servicing rights (residential) 15,980 Discounted cash flow Cost to service per loan (6) $ 77 - 517 129 Discount rate 7.0 - 13.1 % 7.2 Prepayment rate (7) 7.9 - 20.3 9.0 Net derivative assets and (liabilities): Interest rate contracts (101 ) Discounted cash flow Default rate 0.1 - 5.0 2.2 Loss severity 50.0 - 50.0 50.0 Prepayment rate 2.8 - 25.0 11.8 Interest rate contracts: derivative loan commitments (7 ) Discounted cash flow Fall-out factor 1.0 - 99.0 13.9 Initial-value servicing (40.3 ) - 79.3 bps 15.1 Equity contracts 129 Discounted cash flow Conversion factor (9.2 ) - 0.0 % (7.7 ) Weighted average life 0.8 - 2.3 yrs 1.6 (403 ) Option model Correlation factor (77.0 ) - 99.0 % 18.3 Volatility factor 6.5 - 100.0 21.6 Credit contracts (2 ) Market comparable pricing Comparability adjustment (16.2 ) - 37.1 1.6 29 Option model Credit spread 0.0 - 9.2 0.6 Loss severity 13.0 - 60.0 48.3 Nonmarketable equity securities 9 Discounted cash flow Discount rate 10.0 - 10.0 10.0 Volatility Factor 2.3 - 3.1 2.5 6,273 Market comparable pricing Comparability adjustment (21.1 ) - (6.5 ) (14.9 ) 46 Vendor priced Insignificant Level 3 assets, net of liabilities 541 (8) Total level 3 assets, net of liabilities $ 25,866 (9) (1) Weighted averages are calculated using outstanding unpaid principal balance for cash instruments, such as loans and securities, and notional amounts for derivative instruments. (2) Includes $843 million of collateralized debt obligations. (3) Securities backed by specified sources of current and future receivables generated from foreign originators. (4) A significant portion of the balance consists of investments in asset-backed securities that are revolving in nature, for which the timing of advances and repayments of principal are uncertain. (5) Consists of reverse mortgage loans. (6) The high end of the range of inputs is for servicing modified loans. For non-modified loans the range is $77 - $235 . (7) Includes a blend of prepayment speeds and expected defaults. Prepayment speeds are influenced by mortgage interest rates as well as our estimation of drivers of borrower behavior. (8) Represents the aggregate amount of Level 3 assets and liabilities measured at fair value on a recurring basis that are individually and in the aggregate insignificant. The amount includes corporate debt securities, mortgage-backed securities, other trading positions, other liabilities and certain net derivative assets and liabilities, such as commodity contracts, foreign exchange contracts, and other derivative contracts. (9) Consists of total Level 3 assets of $27.9 billion and total Level 3 liabilities of $2.0 billion , before netting of derivative balances. Table 15.12: Valuation Techniques – Recurring Basis –December 31, 2017 ($ in millions, except cost to service amounts) Fair Value Level 3 Valuation Technique(s) Significant Unobservable Input Range of Inputs Weighted Average (1) December 31, 2017 Trading and available-for-sale debt securities: Securities of U.S. states and political subdivisions: Government, healthcare and other revenue bonds $ 868 Discounted cash flow Discount rate 1.7 - 5.8 % 2.7 Other municipal bonds 11 Discounted cash flow Discount rate 4.7 - 4.9 4.8 49 Vendor priced Collateralized loan and other debt obligations (2) 354 Market comparable pricing Comparability adjustment (22.0 ) - 19.5 3.0 1,020 Vendor priced Asset-backed securities: Diversified payment rights (3) 292 Discounted cash flow Discount rate 2.4 - 3.9 3.1 Other commercial and consumer 248 (4) Discounted cash flow Discount rate 3.7 - 5.2 3.9 Weighted average life 2.0 - 2.3 yrs 2.1 26 Vendor priced Mortgage loans held for sale (residential) 974 Discounted cash flow Default rate 0.0 - 7.1 % 1.3 Discount rate 2.6 - 7.3 5.6 Loss severity 0.1 - 41.4 19.6 Prepayment rate 6.5 - 15.9 9.1 24 Market comparable pricing Comparability adjustment (56.3 ) - (6.3 ) (42.7 ) Loans 376 (5) Discounted cash flow Discount rate 3.1 - 7.5 4.2 Prepayment rate 8.7 - 100.0 91.9 Loss severity 0.0 - 33.9 6.6 Mortgage servicing rights (residential) 13,625 Discounted cash flow Cost to service per loan (6) $ 78 - 587 143 Discount rate 6.6 - 12.9 % 6.9 Prepayment rate (7) 9.7 - 20.5 10.5 Net derivative assets and (liabilities): Interest rate contracts 54 Discounted cash flow Default rate 0.0 - 5.0 2.1 Loss severity 50.0 - 50.0 50.0 Prepayment rate 2.8 - 12.5 10.5 Interest rate contracts: derivative loan commitments 17 Discounted cash flow Fall-out factor 1.0 - 99.0 15.2 Initial-value servicing (59.9 ) - 101.1 bps 2.7 Equity contracts 102 Discounted cash flow Conversion factor (9.7 ) - 0.0 % (7.6 ) Weighted average life 0.5 - 3.0 yrs 1.6 (613 ) Option model Correlation factor (77.0 ) - 98.0 % 24.2 Volatility factor 5.7 - 95.5 19.2 Credit contracts (3 ) Market comparable pricing Comparability adjustment (29.9 ) - 17.3 (0.2 ) 39 Option model Credit spread 0.0 - 63.7 1.3 Loss severity 13.0 - 60.0 50.7 Nonmarketable equity securities 8 Discounted cash flow Discount rate 10.0 - 10.0 10.0 Volatility Factor 0.5 - 1.9 1.4 4,813 Market comparable pricing Comparability adjustment (21.1 ) - (5.5 ) (15.0 ) Insignificant Level 3 assets, net of liabilities 570 (8) Total level 3 assets, net of liabilities $ 22,854 (9) (1) Weighted averages are calculated using outstanding unpaid principal balance for cash instruments, such as loans and securities, and notional amounts for derivative instruments. (2) Includes $1.0 billion of collateralized debt obligations. (3) Securities backed by specified sources of current and future receivables generated from foreign originators. (4) A significant portion of the balance consists of investments in asset-backed securities that are revolving in nature, for which the timing of advances and repayments of principal are uncertain. (5) Consists of reverse mortgage loans. (6) The high end of the range of inputs is for servicing modified loans. For non-modified loans the range is $78 - $252 . (7) Includes a blend of prepayment speeds and expected defaults. Prepayment speeds are influenced by mortgage interest rates as well as our estimation of drivers of borrower behavior. (8) Represents the aggregate amount of Level 3 assets and liabilities measured at fair value on a recurring basis that are individually and in the aggregate insignificant. The amount includes corporate debt securities, mortgage-backed securities, other trading positions, other liabilities and certain net derivative assets and liabilities, such as commodity contracts, foreign exchange contracts, and other derivative contracts. (9) Consists of total Level 3 assets of $24.9 billion and total Level 3 liabilities of $2.0 billion , before netting of derivative balances.
Fair Value, Assets Recorded at Fair Value on a Nonrecurring Basis	Table 15.13 provides the fair value hierarchy and fair value at the date of the nonrecurring fair value adjustment for all assets that were still held as of September 30, 2018 , and December 31, 2017 , and for which a nonrecurring fair value adjustment was recorded during the nine months ended September 30, 2018 and year ended December 31, 2017 . Table 15.13: Fair Value on a Nonrecurring Basis September 30, 2018 December 31, 2017 (in millions) Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Mortgage loans held for sale (LOCOM) (1) $ — 1,641 1,252 2,893 — 1,646 1,333 2,979 Loans held for sale — 334 — 334 — 108 — 108 Loans: Commercial — 313 — 313 — 374 — 374 Consumer — 295 1 296 — 502 10 512 Total loans (2) — 608 1 609 — 876 10 886 Nonmarketable equity securities (3) — 613 212 825 — — 136 136 Other assets (4) — 183 6 189 — 177 161 338 Total assets at fair value on a nonrecurring basis (5) $ — 3,379 1,471 4,850 — 2,807 1,640 4,447 (1) Consists of commercial mortgages and residential real estate 1-4 family first mortgage loans. (2) Represents the carrying value of loans for which nonrecurring adjustments are based on the appraised value of the collateral. (3) Consists of certain nonmarketable equity securities that are measured at fair value on a nonrecurring basis, including observable price adjustments for nonmarketable equity securities carried under the measurement alternative. (4) Includes the fair value of foreclosed real estate, other collateral owned and operating lease assets. (5) Prior period balances exclude $6 million of nonmarketable equity securities at NAV.
Changes in Fair Value of Assets Recorded at Fair Value on Nonrecurring Basis	Table 15.14 presents the increase (decrease) in value of certain assets held at the end of the respective reporting periods presented for which a nonrecurring fair value adjustment was recognized during the periods presented. Table 15.14: Change in Value of Assets with Nonrecurring Fair Value Adjustment Nine months ended Sep 30, (in millions) 2018 2017 Mortgage loans held for sale (LOCOM) $ 7 23 Loans held for sale (46 ) (1 ) Loans: Commercial (175 ) (286 ) Consumer (241 ) (371 ) Total loans (1) (416 ) (657 ) Nonmarketable equity securities (2) 206 (108 ) Other assets (3) (36 ) (71 ) Total $ (285 ) (814 ) (1) Represents write-downs of loans based on the appraised value of the collateral. (2) Includes impairment losses and observable price adjustments for certain nonmarketable equity securities. (3) Includes the losses on foreclosed real estate and other collateral owned that were measured at fair value subsequent to their initial classification as foreclosed assets.
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis, Quantitative Information about Valuation Techniques and Unobservable Inputs	Table 15.15 provides quantitative information about the valuation techniques and significant unobservable inputs used in the valuation of substantially all of our Level 3 assets that are measured at fair value on a nonrecurring basis using an internal model. The table is limited to financial instruments that had nonrecurring fair value adjustments during the periods presented. We have excluded from the table valuation techniques and significant unobservable inputs for certain classes of Level 3 assets measured using an internal model that we consider, both individually and in the aggregate, insignificant relative to our overall Level 3 nonrecurring measurements. We made this determination based upon an evaluation of each class that considered the magnitude of the positions, nature of the unobservable inputs and potential for significant changes in fair value due to changes in those inputs. Table 15.15: Valuation Techniques – Nonrecurring Basis ($ in millions) Fair Value Level 3 Valuation Technique(s) (1) Significant Unobservable Inputs (1) Range of inputs Weighted Average (2) September 30, 2018 Residential mortgage loans held for sale (LOCOM) $ 1,252 (3) Discounted cash flow Default rate (4) 0.2 — 2.4 % 1.3 % Discount rate 1.5 — 8.5 4.0 Loss severity 0.6 — 63.0 1.9 Prepayment rate (5) 4.6 — 100.0 47.4 Nonmarketable equity securities 12 Discounted cash flow Discount rate 5.0 — 10.5 7.3 Insignificant level 3 assets 207 Total $ 1,471 December 31, 2017 Residential mortgage loans held for sale (LOCOM) $ 1,333 (3) Discounted cash flow Default rate (4) 0.1 — 4.1 % 1.7 % Discount rate 1.5 — 8.5 3.8 Loss severity 0.7 — 52.9 2.2 Prepayment rate (5) 5.4 — 100.0 50.6 Nonmarketable equity securities 122 Discounted cash flow Discount rate 5.0 — 10.5 10.2 Insignificant level 3 assets 185 Total $ 1,640 (1) Refer to the narrative following Table 15.12 for a definition of the valuation technique(s) and significant unobservable inputs. (2) For residential MLHFS, weighted averages are calculated using the outstanding unpaid principal balance of the loans. (3) Consists of approximately $1.2 billion and $1.3 billion of government insured/guaranteed loans purchased from GNMA-guaranteed mortgage securitizations at September 30, 2018 , and December 31, 2017 , respectively, and $26 million of other mortgage loans that are not government insured/guaranteed at both dates. (4) Applies only to non-government insured/guaranteed loans. (5) Includes the impact on prepayment rate of expected defaults for government insured/guaranteed loans, which impact the frequency and timing of early resolution of loans.
Fair Value Option, Carrying Amount	Table 15.16 reflects differences between the fair value carrying amount of the assets for which we have elected the fair value option and the contractual aggregate unpaid principal amount at maturity. Table 15.16: Fair Value Option September 30, 2018 December 31, 2017 (in millions) Fair value carrying amount Aggregate unpaid principal Fair value carrying amount less aggregate unpaid principal Fair value carrying amount Aggregate unpaid principal Fair value carrying amount less aggregate unpaid principal Mortgage loans held for sale: Total loans $ 13,885 13,808 77 16,116 15,827 289 Nonaccrual loans 122 158 (36 ) 127 165 (38 ) Loans 90 days or more past due and still accruing 8 11 (3 ) 16 21 (5 ) Loans held for sale: Total loans 1,266 1,301 (35 ) 1,023 1,075 (52 ) Nonaccrual loans 33 47 (14 ) 34 56 (22 ) Loans: Total loans 286 318 (32 ) 376 404 (28 ) Nonaccrual loans 206 238 (32 ) 253 281 (28 ) Equity securities (1) 6,313 N/A N/A 4,867 N/A N/A (1) Consists of nonmarketable equity securities carried at fair value.
Fair Value Option, Gains and Losses	The changes in fair value related to initial measurement and subsequent changes in fair value included in earnings for these assets measured at fair value are shown in Table 15.17 by income statement line item. Table 15.17: Fair Value Option – Changes in Fair Value Included in Earnings 2018 2017 (in millions) Mortgage banking noninterest income Net gains (losses) from trading activities Net gains from equity securities Other noninterest income Mortgage banking noninterest income Net gains (losses) from trading activities Net gains Other noninterest income Quarter ended Sep 30, Mortgage loans held for sale $ 183 — — — 400 — — — Loans held for sale — 3 — 1 — 6 — — Loans — — — — — — — — Equity securities — — 798 — — — 522 — Other interests held (1) — — — — — (1 ) — — Nine months ended Sep 30, Mortgage loans held for sale $ 238 — — — 967 — — — Loans held for sale — 18 — 1 — 42 — 1 Loans — — — (1 ) — — — — Equity securities — — 1,492 — — — 1,233 — Other interests held (1) — (2 ) — — — (5 ) — — (1) Includes retained interests in securitizations.
Fair Value Option, Instrument Specific Credit Risk	Table 15.18 shows the estimated gains and losses from earnings attributable to instrument-specific credit risk related to assets accounted for under the fair value option. Table 15.18: Fair Value Option – Gains/Losses Attributable to Instrument-Specific Credit Risk Quarter ended September 30, Nine months ended September 30, (in millions) 2018 2017 2018 2017 Gains (losses) attributable to instrument-specific credit risk: Mortgage loans held for sale $ (1 ) (4 ) (2 ) (9 ) Loans held for sale 3 6 18 42 Total $ 2 2 16 33
Fair Value, Estimates for Financial Instruments Excluding those Recorded at Fair Value on a Recurring Basis	Table 15.19 is a summary of fair value estimates for financial instruments, excluding financial instruments recorded at fair value on a recurring basis, as they are included within Table 15.2 in this Note. In connection with the adoption of ASU 2016-01 in first quarter 2018, the valuation methodologies for estimating the fair value of financial instruments in Table 15.19 have been changed, where necessary, to conform with an exit price notion . Under an exit price notion, fair value estimates are based upon the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the balance sheet date. For certain loans and deposit liabilities, the estimated fair values prior to adoption of ASU 2016-01 followed an entrance price notion that based fair values on recent prices offered to customers for loans and deposits with similar characteristics. The carrying amounts in the following table are recorded on the balance sheet under the indicated captions. We have not included assets and liabilities that are not financial instruments in our disclosure, such as the value of the long-term relationships with our deposit, credit card and trust customers, amortized MSRs, premises and equipment, goodwill and other intangibles, deferred taxes and other liabilities. The total of the fair value calculations presented does not represent, and should not be construed to represent, the underlying value of the Company. Table 15.19: Fair Value Estimates for Financial Instruments Estimated fair value (in millions) Carrying amount Level 1 Level 2 Level 3 Total September 30, 2018 Financial assets Cash and due from banks (1) $ 18,791 18,791 — — 18,791 Interest-earning deposits with banks (1) 140,732 140,566 166 — 140,732 Federal funds sold and securities purchased under resale agreements (1) 83,471 — 83,471 — 83,471 Held-to-maturity debt securities 144,131 43,668 94,881 487 139,036 Mortgage loans held for sale 5,340 — 4,098 1,252 5,350 Loans held for sale 499 — 500 — 500 Loans, net (2)(3) 912,548 — 46,272 867,348 913,620 Nonmarketable equity securities (cost method) (4) 5,467 — — 5,500 5,500 Total financial assets $ 1,310,979 203,025 229,388 874,587 1,307,000 Financial liabilities Deposits (3)(5) $ 128,648 — 107,272 21,257 128,529 Short-term borrowings 105,451 — 105,451 — 105,451 Long-term debt (6) 221,286 — 222,436 1,879 224,315 Total financial liabilities $ 455,385 — 435,159 23,136 458,295 December 31, 2017 Financial assets Cash and due from banks (1) $ 23,367 23,367 — — 23,367 Interest-earning deposits with banks (1) 192,580 192,455 125 — 192,580 Federal funds sold and securities purchased under resale agreements (1) 80,025 1,002 78,954 69 80,025 Held-to-maturity securities 139,335 44,806 93,694 485 138,985 Mortgage loans held for sale 3,954 — 2,625 1,333 3,958 Loans held for sale 108 — 108 — 108 Loans, net (2)(3) 926,273 — 51,713 886,622 938,335 Nonmarketable equity securities (cost method) 7,136 — 23 7,605 7,628 Total financial assets (7) $ 1,372,778 261,630 227,242 896,114 1,384,986 Financial liabilities Deposits (3)(5) $ 128,594 — 108,146 19,768 127,914 Short-term borrowings 103,256 — 103,256 — 103,256 Long-term debt (6) 224,981 — 227,109 3,159 230,268 Total financial liabilities $ 456,831 — 438,511 22,927 461,438 (1) Amounts consist of financial instruments for which carrying value approximates fair value. (2) Excludes lease financing with a carrying amount of $19.7 billion and $19.4 billion at September 30, 2018 , and December 31, 2017 , respectively. (3) In connection with the adoption of ASU 2016-01, the valuation methodologies used to estimate the fair value at September 30, 2018 , for a portion of loans and deposit liabilities with a defined or contractual maturity has been changed to conform to an exit price notion. The fair value estimates at December 31, 2017 have not been revised to reflect application of the modified methodology. (4) Excludes $1.4 billion of nonmarketable equity securities accounted for under the measurement alternative at September 30, 2018 , that were accounted for under the cost method in prior periods. (5) Excludes deposit liabilities with no defined or contractual maturity of $1.1 trillion and $1.2 trillion at September 30, 2018 and December 31, 2017 , respectively. (6) Excludes capital lease obligations under capital leases of $37 million and $39 million at September 30, 2018 , and December 31, 2017 , respectively. (7) Excludes $27 million of carrying value and $30 million of fair value relating to nonmarketable equity securities at NAV at December 31, 2017 .

Preferred Stock (Tables)

Preferred Stock (Tables)	9 Months Ended
	Sep. 30, 2018
Preferred Stock [Abstract]
Preferred Stock Shares	Our total authorized, issued and outstanding preferred stock is presented in the following two tables along with the Employee Stock Ownership Plan (ESOP) Cumulative Convertible Preferred Stock. Table 16.1: Preferred Stock Shares September 30, 2018 December 31, 2017 Liquidation preference per share Shares authorized and designated Liquidation preference per share Shares authorized and designated DEP Shares Dividend Equalization Preferred Shares (DEP) $ 10 97,000 $ 10 97,000 Series I Floating Class A Preferred Stock (1) 100,000 25,010 100,000 25,010 Series J 8.00% Non-Cumulative Perpetual Class A Preferred Stock (2) — — 1,000 2,300,000 Series K Floating Non-Cumulative Perpetual Class A Preferred Stock (3) 1,000 3,500,000 1,000 3,500,000 Series L 7.50% Non-Cumulative Perpetual Convertible Class A Preferred Stock 1,000 4,025,000 1,000 4,025,000 Series N 5.20% Non-Cumulative Perpetual Class A Preferred Stock 25,000 30,000 25,000 30,000 Series O 5.125% Non-Cumulative Perpetual Class A Preferred Stock 25,000 27,600 25,000 27,600 Series P 5.25% Non-Cumulative Perpetual Class A Preferred Stock 25,000 26,400 25,000 26,400 Series Q 5.85% Fixed-to-Floating Non-Cumulative Perpetual Class A Preferred Stock 25,000 69,000 25,000 69,000 Series R 6.625% Fixed-to-Floating Non-Cumulative Perpetual Class A Preferred Stock 25,000 34,500 25,000 34,500 Series S 5.90% Fixed-to-Floating Non-Cumulative Perpetual Class A Preferred Stock 25,000 80,000 25,000 80,000 Series T 6.00% Non-Cumulative Perpetual Class A Preferred Stock 25,000 32,200 25,000 32,200 Series U 5.875% Fixed-to-Floating Non-Cumulative Perpetual Class A Preferred Stock 25,000 80,000 25,000 80,000 Series V 6.00% Non-Cumulative Perpetual Class A Preferred Stock 25,000 40,000 25,000 40,000 Series W 5.70% Non-Cumulative Perpetual Class A Preferred Stock 25,000 40,000 25,000 40,000 Series X 5.50% Non-Cumulative Perpetual Class A Preferred Stock 25,000 46,000 25,000 46,000 Series Y 5.625% Non-Cumulative Perpetual Class A Preferred Stock 25,000 27,600 25,000 27,600 ESOP Cumulative Convertible Preferred Stock (4) — 1,674,596 — 1,556,104 Total 9,854,906 12,036,414 (1) Floating rate for Preferred Stock, Series I, is the greater of three-month LIBOR plus 0.93% and 5.56975%. (2) Preferred Stock, Series J, was redeemed in third quarter 2018. (3) Effective June 15, 2018, Preferred Stock, Series K, converted from a fixed to a floating coupon rate of three-month LIBOR plus 3.77%. (4) See the ESOP Cumulative Convertible Preferred Stock section in this Note for additional information about the liquidation preference for the ESOP Cumulative Convertible Preferred Stock. Table 16.2: Preferred Stock – Shares Issued and Carrying Value September 30, 2018 December 31, 2017 (in millions, except shares) Shares issued and outstanding Liquidation preference value Carrying value Discount Shares issued and outstanding Liquidation preference value Carrying value Discount DEP Shares Dividend Equalization Preferred Shares (DEP) 96,546 $ — — — 96,546 $ — — — Series I (1)(2) Floating Class A Preferred Stock 25,010 2,501 2,501 — 25,010 2,501 2,501 — Series J (1)(3) 8.00% Non-Cumulative Perpetual Class A Preferred Stock — — — — 2,150,375 2,150 1,995 155 Series K (1)(4) Floating Non-Cumulative Perpetual Class A Preferred Stock 3,352,000 3,352 2,876 476 3,352,000 3,352 2,876 476 Series L (1) 7.50% Non-Cumulative Perpetual Convertible Class A Preferred Stock 3,968,000 3,968 3,200 768 3,968,000 3,968 3,200 768 Series N (1) 5.20% Non-Cumulative Perpetual Class A Preferred Stock 30,000 750 750 — 30,000 750 750 — Series O (1) 5.125% Non-Cumulative Perpetual Class A Preferred Stock 26,000 650 650 — 26,000 650 650 — Series P (1) 5.25% Non-Cumulative Perpetual Class A Preferred Stock 25,000 625 625 — 25,000 625 625 — Series Q (1) 5.85% Fixed-to-Floating Non-Cumulative Perpetual Class A Preferred Stock 69,000 1,725 1,725 — 69,000 1,725 1,725 — Series R (1) 6.625% Fixed-to-Floating Non-Cumulative Perpetual Class A Preferred Stock 33,600 840 840 — 33,600 840 840 — Series S (1) 5.90% Fixed-to-Floating Non-Cumulative Perpetual Class A Preferred Stock 80,000 2,000 2,000 — 80,000 2,000 2,000 — Series T (1) 6.00% Non-Cumulative Perpetual Class A Preferred Stock 32,000 800 800 — 32,000 800 800 — Series U (1) 5.875% Fixed-to-Floating Non-Cumulative Perpetual Class A Preferred Stock 80,000 2,000 2,000 — 80,000 2,000 2,000 — Series V (1) 6.00% Non-Cumulative Perpetual Class A Preferred Stock 40,000 1,000 1,000 — 40,000 1,000 1,000 — Series W (1) 5.70% Non-Cumulative Perpetual Class A Preferred Stock 40,000 1,000 1,000 — 40,000 1,000 1,000 — Series X (1) 5.50% Non-Cumulative Perpetual Class A Preferred Stock 46,000 1,150 1,150 — 46,000 1,150 1,150 — Series Y (1) 5.625% Non-Cumulative Perpetual Class A Preferred Stock 27,600 690 690 — 27,600 690 690 — ESOP Cumulative Convertible Preferred Stock 1,674,596 1,675 1,675 — 1,556,104 1,556 1,556 — Total 9,645,352 $ 24,726 23,482 1,244 11,677,235 $ 26,757 25,358 1,399 (1) Preferred shares qualify as Tier 1 capital. (2) Floating rate for Preferred Stock, Series I, is the greater of three-month LIBOR plus 0.93% and 5.56975%. (3) Preferred Stock, Series J, was redeemed in third quarter 2018. (4) Effective June 15, 2018, Preferred Stock, Series K, converted from a fixed to a floating coupon rate of three-month LIBOR plus 3.77%.
ESOP Preferred Stock	Table 16.3: ESOP Preferred Stock Shares issued and outstanding Carrying value Adjustable dividend rate (in millions, except shares) Sep 30, Dec 31, Sep 30, Dec 31, Minimum Maximum ESOP Preferred Stock $1,000 liquidation preference per share 2018 605,081 — $ 605 — 7.00 % 8.00 2017 222,210 273,210 222 273 7.00 8.00 2016 233,835 322,826 234 323 9.30 10.30 2015 144,338 187,436 144 187 8.90 9.90 2014 174,151 237,151 174 237 8.70 9.70 2013 133,948 201,948 134 202 8.50 9.50 2012 77,634 128,634 78 129 10.00 11.00 2011 61,796 129,296 62 129 9.00 10.00 2010 21,603 75,603 22 76 9.50 10.50 Total ESOP Preferred Stock (1) 1,674,596 1,556,104 $ 1,675 1,556 Unearned ESOP shares (2) $ (1,780 ) (1,678 ) (1) At September 30, 2018 and December 31, 2017 , additional paid-in capital included $105 million and $122 million , respectively, related to ESOP preferred stock. (2) We recorded a corresponding charge to unearned ESOP shares in connection with the issuance of the ESOP Preferred Stock. The unearned ESOP shares are reduced as shares of the ESOP Preferred Stock are committed to be released.

Revenue from Contracts with C_2

Revenue from Contracts with Customers (Tables)	9 Months Ended
	Sep. 30, 2018
Revenue from Contract with Customer [Abstract]
Reconciliation of Revenue from Segments to Consolidated [Table Text Block]	Table 17.1 presents our revenue by operating segment. The Other segment for each of the tables below includes the elimination of certain items that are included in more than one business segment, most of which represents products and services for WIM customers served through Consumer Banking distribution channels. For additional description of our operating segments, including additional financial information and the underlying management accounting process, see Note 21 (Operating Segments) to Financial Statements in this Report. Table 17.1 : Revenue by Operating Segment Quarter ended Sep 30, Community Banking Wholesale Banking Wealth and Investment Management Other Consolidated (in millions) 2018 2017 2018 2017 2018 2017 2018 2017 2018 2017 Net interest income (1) $ 7,338 7,154 4,726 4,763 1,102 1,177 (594 ) (645 ) 12,572 12,449 Noninterest income: Service charges on deposit accounts 700 739 505 538 3 3 (4 ) (4 ) 1,204 1,276 Trust and investment fees: Brokerage advisory, commissions and other fees 470 461 79 65 2,268 2,241 (483 ) (463 ) 2,334 2,304 Trust and investment management 231 225 112 129 727 718 (235 ) (232 ) 835 840 Investment banking (17 ) (13 ) 476 479 3 (1 ) — — 462 465 Total trust and investment fees 684 673 667 673 2,998 2,958 (718 ) (695 ) 3,631 3,609 Card fees 925 909 92 91 1 1 (1 ) (1 ) 1,017 1,000 Other fees: Charges and fees on loans (1) 65 72 233 246 — 1 — (1 ) 298 318 Cash network fees 121 125 — 1 — — — — 121 126 Commercial real estate brokerage commissions — 1 129 119 — — — — 129 120 Letters of credit fees (1) 2 1 70 76 1 1 (1 ) (1 ) 72 77 Wire transfer and other remittance fees 67 60 52 52 2 3 (1 ) (1 ) 120 114 All other fees 89 103 20 19 1 — — — 110 122 Total other fees 344 362 504 513 4 5 (2 ) (3 ) 850 877 Mortgage banking (1) 747 937 101 110 (3 ) (3 ) 1 2 846 1,046 Insurance (1) 21 35 76 225 19 21 (12 ) (12 ) 104 269 Net gains (losses) from trading activities (1) 10 (58 ) 135 157 13 21 — — 158 120 Net gains (losses) on debt securities (1) 1 169 53 (5 ) 3 2 — — 57 166 Net gains from equity securities (1) 274 270 50 40 92 53 — — 416 363 Lease income (1) — — 453 475 — — — — 453 475 Other income of the segment (1) 772 330 (58 ) (76 ) (6 ) 18 (75 ) (73 ) 633 199 Total noninterest income 4,478 4,366 2,578 2,741 3,124 3,079 (811 ) (786 ) 9,369 9,400 Revenue $ 11,816 11,520 7,304 7,504 4,226 4,256 (1,405 ) (1,431 ) 21,941 21,849 Nine months ended Sep 30, Community Banking Wholesale Banking Wealth and Investment Management Other Consolidated 2018 2017 2018 2017 2018 2017 2018 2017 2018 2017 Net interest income (1) $ 21,879 21,419 13,951 14,253 3,325 3,489 (1,804 ) (1,917 ) 37,351 37,244 Noninterest income: Service charges on deposit accounts 1,971 2,206 1,569 1,658 12 13 (12 ) (12 ) 3,540 3,865 Trust and investment fees: Brokerage advisory, commissions and other fees 1,413 1,357 224 231 6,896 6,741 (1,442 ) (1,372 ) 7,091 6,957 Trust and investment management 684 658 335 390 2,201 2,137 (700 ) (679 ) 2,520 2,506 Investment banking (27 ) (60 ) 1,401 1,407 4 (2 ) — — 1,378 1,345 Total trust and investment fees 2,070 1,955 1,960 2,028 9,101 8,876 (2,142 ) (2,051 ) 10,989 10,808 Card fees 2,650 2,703 275 260 4 4 (3 ) (3 ) 2,926 2,964 Other fees: Charges and fees on loans (1) 208 235 695 715 2 3 (2 ) (3 ) 903 950 Cash network fees 364 379 3 7 — — — — 367 386 Commercial real estate brokerage commissions — 1 323 302 — — — — 323 303 Letters of credit fees (1) 4 4 219 223 3 3 (3 ) (3 ) 223 227 Wire transfer and other remittance fees 197 178 157 151 6 7 (3 ) (3 ) 357 333 All other fees 246 355 75 89 2 1 — — 323 445 Total other fees 1,019 1,152 1,472 1,487 13 14 (8 ) (9 ) 2,496 2,644 Mortgage banking (1) 2,284 3,081 269 343 (8 ) (7 ) 5 5 2,550 3,422 Insurance (1) 65 104 233 695 55 63 (33 ) (36 ) 320 826 Net gains (losses) from trading activities (1) 33 (143 ) 514 615 45 71 — — 592 543 Net gains (losses) on debt securities (1) (1 ) 455 96 (135 ) 4 2 — — 99 322 Net gains from equity securities (1) 1,367 960 232 92 (105 ) 155 — — 1,494 1,207 Lease income (1) — — 1,351 1,449 — — — — 1,351 1,449 Other income of the segment (1) 2,115 1,406 (142 ) (185 ) (27 ) 59 (226 ) (235 ) 1,720 1,045 Total noninterest income 13,573 13,879 7,829 8,307 9,094 9,250 (2,419 ) (2,341 ) 28,077 29,095 Revenue $ 35,452 35,298 21,780 22,560 12,419 12,739 (4,223 ) (4,258 ) 65,428 66,339 (1) These revenues are not within the scope of ASU 2014-09 – Revenue from Contracts with Customers , and additional details are included in other footnotes to our financial statements. The scope explicitly excludes net interest income as well as many other revenues for financial assets and liabilities, including loans, leases, securities, and derivatives.
Disaggregation of Revenue [Table Text Block]	Table 17.5 presents our card fees by operating segment. Table 17.5 : Card Fees by Operating Segment Quarter ended Sep 30, Community Banking Wholesale Banking Wealth and Investment Management Other Consolidated (in millions) 2018 2017 2018 2017 2018 2017 2018 2017 2018 2017 Credit card interchange and network revenues (1) $ 218 230 92 91 1 1 (1 ) (1 ) 310 321 Debit card interchange and network revenues 523 496 — — — — — — 523 496 Late fees, cash advance fees, balance transfer fees, and annual fees 184 183 — — — — — — 184 183 Card fees (1) $ 925 909 92 91 1 1 (1 ) (1 ) 1,017 1,000 Nine months ended Sep 30, Community Banking Wholesale Banking Wealth and Investment Management Other Consolidated (in millions) 2018 2017 2018 2017 2018 2017 2018 2017 2018 2017 Credit card interchange and network revenues (1) $ 600 703 275 260 4 4 (3 ) (3 ) 876 964 Debit card interchange and network revenues 1,527 1,459 — — — — — — 1,527 1,459 Late fees, cash advance fees, balance transfer fees, and annual fees 523 541 — — — — — — 523 541 Card fees (1) $ 2,650 2,703 275 260 4 4 (3 ) (3 ) 2,926 2,964 (1) The cost of credit card rewards and rebates of $335 million and $1,013 million for the quarter and nine months ended September 30, 2018, respectively, and $310 million and $873 million for the quarter and nine months ended September 30, 2017, respectively, are presented net against the related revenues. Table 17.3 presents our brokerage advisory, commissions and other fees by operating segment. Table 17.3 : Brokerage Advisory, Commissions and Other Fees by Operating Segment Quarter ended Sep 30, Community Banking Wholesale Banking Wealth and Investment Management Other Consolidated (in millions) 2018 2017 2018 2017 2018 2017 2018 2017 2018 2017 Asset-based revenue (1) $ 371 347 1 — 1,720 1,669 (372 ) (347 ) 1,720 1,669 Transactional revenue 82 93 19 9 388 421 (94 ) (95 ) 395 428 Other revenue 17 21 59 56 160 151 (17 ) (21 ) 219 207 Brokerage advisory, commissions and other fees $ 470 461 79 65 2,268 2,241 (483 ) (463 ) 2,334 2,304 Nine months ended Sep 30, Community Banking Wholesale Banking Wealth and Investment Management Other Consolidated (in millions) 2018 2017 2018 2017 2018 2017 2018 2017 2018 2017 Asset-based revenue (1) $ 1,107 1,013 1 — 5,185 4,910 (1,108 ) (1,012 ) 5,185 4,911 Transactional revenue 258 287 47 33 1,227 1,356 (286 ) (303 ) 1,246 1,373 Other revenue 48 57 176 198 484 475 (48 ) (57 ) 660 673 Brokerage advisory, commissions and other fees $ 1,413 1,357 224 231 6,896 6,741 (1,442 ) (1,372 ) 7,091 6,957 (1) We earned trailing commissions of $323 million and $975 million in the third quarter and first nine months of 2018, respectively, and $337 million and $1.0 billion for the third quarter and nine months of 2017, respectively. Table 17.2 presents our service charges on deposit accounts by operating segment. Table 17.2 : Service Charges on Deposit Accounts by Operating Segment Quarter ended Sep 30, Community Banking Wholesale Banking Wealth and Investment Management Other Consolidated (in millions) 2018 2017 2018 2017 2018 2017 2018 2017 2018 2017 Overdraft fees $ 484 503 1 2 — — — — 485 505 Account charges 216 236 504 536 3 3 (4 ) (4 ) 719 771 Service charges on deposit accounts $ 700 739 505 538 3 3 (4 ) (4 ) 1,204 1,276 Nine months ended Sep 30, Community Banking Wholesale Banking Wealth and Investment Management Other Consolidated (in millions) 2018 2017 2018 2017 2018 2017 2018 2017 2018 2017 Overdraft fees $ 1,312 1,471 4 5 1 1 — — 1,317 1,477 Account charges 659 735 1,565 1,653 11 12 (12 ) (12 ) 2,223 2,388 Service charges on deposit accounts $ 1,971 2,206 1,569 1,658 12 13 (12 ) (12 ) 3,540 3,865 Table 17.4 presents our trust and investment management fees by operating segment. Table 17.4 : Trust and Investment Management Fees by Operating Segment Quarter ended Sep 30, Community Banking Wholesale Banking Wealth and Investment Management Other Consolidated (in millions) 2018 2017 2018 2017 2018 2017 2018 2017 2018 2017 Investment management fees $ — — — — 520 508 — — 520 508 Trust fees 229 224 82 104 181 189 (235 ) (231 ) 257 286 Other revenue 2 1 30 25 26 21 — (1 ) 58 46 Trust and investment management fees $ 231 225 112 129 727 718 (235 ) (232 ) 835 840 Nine months ended Sep 30, Community Banking Wholesale Banking Wealth and Investment Management Other Consolidated (in millions) 2018 2017 2018 2017 2018 2017 2018 2017 2018 2017 Investment management fees $ — 2 — — 1,585 1,525 — — 1,585 1,527 Trust fees 682 655 250 315 554 566 (700 ) (678 ) 786 858 Other revenue 2 1 85 75 62 46 — (1 ) 149 121 Trust and investment management fees $ 684 658 335 390 2,201 2,137 (700 ) (679 ) 2,520 2,506

Employee Benefits (Tables)

Employee Benefits (Tables)	9 Months Ended
	Sep. 30, 2018
Defined Benefit Plan [Abstract]
Net Periodic Benefit Cost	Table 18.1 presents the components of net periodic benefit cost. Table 18.1: Net Periodic Benefit Cost 2018 2017 Pension benefits Pension benefits (in millions) Qualified Non-qualified Other benefits Qualified Non-qualified Other benefits Quarter ended September 30, Service cost $ 2 — — 1 — — Interest cost (1) 97 5 6 103 5 7 Expected return on plan assets (1) (160 ) — (8 ) (163 ) — (7 ) Amortization of net actuarial loss (gain) (1) 32 4 (4 ) 37 3 (3 ) Amortization of prior service credit (1) — — (3 ) — — (2 ) Settlement loss (1) — — — 6 — — Net periodic benefit cost (income) $ (29 ) 9 (9 ) (16 ) 8 (5 ) Nine months ended September 30, Service cost $ 5 — — 4 — — Interest cost (1) 293 16 16 309 17 21 Expected return on plan assets (1) (481 ) — (23 ) (489 ) — (22 ) Amortization of net actuarial loss (gain) (1) 98 10 (13 ) 113 9 (8 ) Amortization of prior service credit (1) — — (8 ) — — (7 ) Settlement loss (1) — 3 — 7 6 — Net periodic benefit cost (income) $ (85 ) 29 (28 ) (56 ) 32 (16 ) (1) Effective January 1, 2018, we adopted ASU 2017-07 – Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost . Accordingly, 2018 balances are reported in other noninterest expense on the consolidated statement of income. For 2017, these balances were reported in employee benefits.

Earnings Per Common Share (Tabl

Earnings Per Common Share (Tables)	9 Months Ended
	Sep. 30, 2018
Earnings Per Share [Abstract]
Earnings Per Common Share Calculations	Table 19.1 shows earnings per common share and diluted earnings per common share and reconciles the numerator and denominator of both earnings per common share calculations. Table 19.1: Earnings Per Common Share Calculations Quarter ended September 30, Nine months ended September 30, (in millions, except per share amounts) 2018 2017 2018 2017 Wells Fargo net income (1) $ 6,007 4,542 $ 16,329 16,032 Less: Preferred stock dividends and other (2) 554 411 1,351 1,218 Wells Fargo net income applicable to common stock (numerator) (1) $ 5,453 4,131 $ 14,978 14,814 Earnings per common share Average common shares outstanding (denominator) 4,784.0 4,948.6 4,844.8 4,982.1 Per share (1) $ 1.14 0.83 $ 3.09 2.97 Diluted earnings per common share Average common shares outstanding 4,784.0 4,948.6 4,844.8 4,982.1 Add: Stock options 7.5 15.8 8.5 18.1 Restricted share rights 26.5 22.4 25.9 24.1 Warrants 5.2 10.0 5.8 11.1 Diluted average common shares outstanding (denominator) 4,823.2 4,996.8 4,885.0 5,035.4 Per share (1) $ 1.13 0.83 $ 3.07 2.94 (1) Financial information for the prior period has been revised to reflect the impact of the adoption of ASU 2017-12 – Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities, effective January 1, 2017. (2) The quarter and nine months ended September 30, 2018 , includes $155 million as a result of eliminating the discount on our Series J Preferred Stock, which was redeemed on September 17, 2018.
Outstanding Anti-Dilutive Options	Table 19.2 presents the outstanding options to purchase shares of common stock that were anti-dilutive (the exercise price was higher than the weighted-average market price), and therefore not included in the calculation of diluted earnings per common share. Table 19.2: Outstanding Anti-Dilutive Options Weighted-average shares Quarter ended September 30, Nine months ended September 30, (in millions) 2018 2017 2018 2017 Options — 1.8 0.4 2.0
Dividends declared per common share	Table 19.3 presents dividends declared per common share. Table 19.3: Dividends Declared Per Common Share Quarter ended September 30, Nine months ended September 30, 2018 2017 2018 2017 Per common share $ 0.430 0.390 1.210 1.150

Other Comprehensive Income (Tab

Other Comprehensive Income (Tables)	9 Months Ended
	Sep. 30, 2018
Cumulative Other Comprehensive Income Balances [Abstract]
Summary of Other Comprehensive Income	Table 20.1 provides the components of other comprehensive income (OCI), reclassifications to net income by income statement line item, and the related tax effects. Table 20.1: Summary of Other Comprehensive Income Quarter ended September 30, Nine months ended September 30, 2018 2017 2018 2017 (in millions) Before tax Tax effect Net of tax Before tax Tax effect Net of tax Before tax Tax effect Net of tax Before tax Tax effect Net of tax Debt securities (1): Net unrealized gains (losses) arising during the period $ (1,468 ) 360 (1,108 ) 891 (353 ) 538 (5,528 ) 1,360 (4,168 ) 2,825 (1,075 ) 1,750 Reclassification of net (gains) losses to net income: Interest income on debt securities (2) 109 (27 ) 82 70 (26 ) 44 268 (66 ) 202 122 (46 ) 76 Net gains on debt securities (57 ) 15 (42 ) (166 ) 62 (104 ) (99 ) 25 (74 ) (322 ) 119 (203 ) Net gains from equity securities (3) — — — (106 ) 41 (65 ) — — — (323 ) 120 (203 ) Other noninterest income (1 ) — (1 ) 2 — 2 (1 ) — (1 ) 1 — 1 Subtotal reclassifications to net income 51 (12 ) 39 (200 ) 77 (123 ) 168 (41 ) 127 (522 ) 193 (329 ) Net change (1,417 ) 348 (1,069 ) 691 (276 ) 415 (5,360 ) 1,319 (4,041 ) 2,303 (882 ) 1,421 Derivatives and hedging activities: Fair Value Hedges: Change in fair value of excluded components on fair value hedges (4) (21 ) 5 (16 ) 72 (26 ) 46 (147 ) 36 (111 ) (254 ) 96 (158 ) Cash Flow Hedges: Net unrealized gains (losses) arising during the period on cash flow hedges (3 ) — (3 ) 32 (12 ) 20 (269 ) 66 (203 ) 272 (103 ) 169 Reclassification of net (gains) losses to net income on cash flow hedges: Interest income on loans 78 (19 ) 59 (107 ) 42 (65 ) 215 (53 ) 162 (468 ) 178 (290 ) Interest expense on long-term debt 1 — 1 2 (1 ) 1 1 — 1 8 (3 ) 5 Subtotal reclassifications to net income 79 (19 ) 60 (105 ) 41 (64 ) 216 (53 ) 163 (460 ) 175 (285 ) Net change 55 (14 ) 41 (1 ) 3 2 (200 ) 49 (151 ) (442 ) 168 (274 ) Defined benefit plans adjustments: Net actuarial and prior service gains arising during the period — — — 11 (5 ) 6 6 (2 ) 4 4 (2 ) 2 Reclassification of amounts to net periodic benefit costs (5): Amortization of net actuarial loss 32 (8 ) 24 37 (13 ) 24 95 (23 ) 72 114 (43 ) 71 Settlements and other (3 ) 2 (1 ) 4 (1 ) 3 (5 ) 3 (2 ) 6 — 6 Subtotal reclassifications to net periodic benefit costs 29 (6 ) 23 41 (14 ) 27 90 (20 ) 70 120 (43 ) 77 Net change 29 (6 ) 23 52 (19 ) 33 96 (22 ) 74 124 (45 ) 79 Foreign currency translation adjustments: Net unrealized gains (losses) arising during the period (9 ) 2 (7 ) 39 3 42 (94 ) — (94 ) 86 6 92 Net change (9 ) 2 (7 ) 39 3 42 (94 ) — (94 ) 86 6 92 Other comprehensive income (loss) $ (1,342 ) 330 (1,012 ) 781 (289 ) 492 (5,558 ) 1,346 (4,212 ) 2,071 (753 ) 1,318 Less: Other comprehensive loss from noncontrolling interests, net of tax — (34 ) (1 ) (29 ) Wells Fargo other comprehensive income (loss), net of tax $ (1,012 ) 526 (4,211 ) 1,347 (1) The quarter and nine months ended ended September 30, 2017 includes net unrealized gains (losses) arising during the period from equity securities of $(13) million and $113 million and reclassification of net (gains) losses to net income related to equity securities of $(106) million and $(323) million , respectively. With the adoption in first quarter 2018 of ASU 2016-01, the quarter and nine months ended September 30, 2018 reflects net unrealized gains (losses) arising during the period and reclassification of net (gains) losses to net income from only debt securities. (2) Represents net unrealized gains and losses amortized over the remaining lives of securities that were transferred from the available-for-sale portfolio to the held-to-maturity portfolio. (3) Net gains from equity securities is presented for table presentation purposes. After adoption of ASU 2016-01 on January 1, 2018, this line does not contain balances as realized and unrealized gains and losses on marketable equity securities are recorded in earnings. (4) Represents changes in fair value of cross-currency swaps attributable to changes in cross-currency basis spreads, which are excluded from the assessment of effectiveness recorded in other comprehensive income. (5) These items are included in the computation of net periodic benefit cost, which is recorded in employee benefits expense (see Note 18 (Employee Benefits) for additional details).
Cumulative OCI Balances	Table 20.2: Cumulative OCI Balances (in millions) Debt securities (1) Derivatives and hedging activities Defined benefit plans adjustments Foreign currency translation adjustments Cumulative other compre- hensive income Quarter ended September 30, 2018 Balance, beginning of period $ (2,919 ) (610 ) (1,757 ) (175 ) (5,461 ) Reclassification of certain tax effects to retained earnings (2) 31 (87 ) (353 ) 9 (400 ) Net unrealized losses arising during the period (1,108 ) (19 ) — (7 ) (1,134 ) Amounts reclassified from accumulated other comprehensive income 39 60 23 — 122 Net change (1,038 ) (46 ) (330 ) 2 (1,412 ) Balance, end of period $ (3,957 ) (656 ) (2,087 ) (173 ) (6,873 ) Quarter ended September 30, 2017 Balance, beginning of period $ (96 ) (19 ) (1,897 ) (136 ) (2,148 ) Net unrealized gains arising during the period 538 66 6 42 652 Amounts reclassified from accumulated other comprehensive income (123 ) (64 ) 27 — (160 ) Net change 415 2 33 42 492 Less: Other comprehensive loss from noncontrolling interests (34 ) — — — (34 ) Balance, end of period $ 353 (17 ) (1,864 ) (94 ) (1,622 ) Nine months ended September 30, 2018 Balance, beginning of period $ 171 (418 ) (1,808 ) (89 ) (2,144 ) Transition adjustment (3) (118 ) — — — (118 ) Balance, January 1, 2018 53 (418 ) (1,808 ) (89 ) (2,262 ) Reclassification of certain tax effects to retained earnings (2) 31 (87 ) (353 ) 9 (400 ) Net unrealized gains (losses) arising during the period (4,168 ) (314 ) 4 (94 ) (4,572 ) Amounts reclassified from accumulated other comprehensive income 127 163 70 — 360 Net change (4,010 ) (238 ) (279 ) (85 ) (4,612 ) Less: Other comprehensive loss from noncontrolling interests — — — (1 ) (1 ) Balance, end of period $ (3,957 ) (656 ) (2,087 ) (173 ) (6,873 ) Nine months ended September 30, 2017 Balance, beginning of period $ (1,099 ) 89 (1,943 ) (184 ) (3,137 ) Transition adjustment (4) — 168 — — 168 Balance, January 1, 2017 (1,099 ) 257 (1,943 ) (184 ) (2,969 ) Net unrealized gains arising during the period 1,750 11 2 92 1,855 Amounts reclassified from accumulated other comprehensive income (329 ) (285 ) 77 — (537 ) Net change 1,421 (274 ) 79 92 1,318 Less: Other comprehensive income (loss) from noncontrolling interests (31 ) — — 2 (29 ) Balance, end of period $ 353 (17 ) (1,864 ) (94 ) (1,622 ) (1) The quarter and nine months ended ended September 30, 2017 includes net unrealized gains (losses) arising during the period from equity securities of $(13) million and $113 million and reclassification of net (gains) losses to net income related to equity securities of $(106) million and $(323) million , respectively. With the adoption in first quarter 2018 of ASU 2016-01, the quarter and nine months ended September 30, 2018 reflects net unrealized gains (losses) arising during the period and reclassification of net (gains) losses to net income from only debt securities. (2) Represents the reclassification from other comprehensive income to retained earnings as a result of the adoption of ASU 2018-02 – Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income, in the third quarter of 2018. For additional information, see Note 1. (3) The transition adjustment relates to the adoption of ASU 2016-01 – Financial Instruments – Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities . See Note 1 (Summary of Significant Accounting Policies) for more information. (4) The transition adjustment relates to the adoption of ASU 2017-12, Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities .

Operating Segments (Tables)

Operating Segments (Tables)	9 Months Ended
	Sep. 30, 2018
Segment Reporting [Abstract]
Operating Segments	Table 21.1 presents our results by operating segment. Table 21.1: Operating Segments Community Wholesale Banking Wealth and Investment Management Other (1) Consolidated Company (income/expense in millions, average balances in billions) 2018 2017 2018 2017 2018 2017 2018 2017 2018 2017 Quarter ended Net interest income (2) $ 7,338 7,154 4,726 4,763 1,102 1,177 (594 ) (645 ) 12,572 12,449 Provision (reversal of provision) for credit losses 547 650 26 69 6 (1 ) 1 (1 ) 580 717 Noninterest income 4,478 4,366 2,578 2,741 3,124 3,079 (811 ) (786 ) 9,369 9,400 Noninterest expense 7,467 7,852 3,935 4,234 3,243 3,102 (882 ) (837 ) 13,763 14,351 Income (loss) before income tax expense (benefit) 3,802 3,018 3,343 3,201 977 1,155 (524 ) (593 ) 7,598 6,781 Income tax expense (benefit) 925 1,079 475 894 244 433 (132 ) (225 ) 1,512 2,181 Net income (loss) before noncontrolling interests 2,877 1,939 2,868 2,307 733 722 (392 ) (368 ) 6,086 4,600 Less: Net income (loss) from noncontrolling interests 61 62 17 (7 ) 1 3 — — 79 58 Net income (loss) (3) $ 2,816 1,877 2,851 2,314 732 719 (392 ) (368 ) 6,007 4,542 Average loans $ 460.9 473.7 462.8 463.7 74.6 72.4 (58.8 ) (57.5 ) 939.5 952.3 Average assets 1,024.9 1,089.6 827.2 824.2 83.8 83.2 (59.6 ) (58.5 ) 1,876.3 1,938.5 Average deposits 760.9 734.6 413.6 463.4 159.8 184.4 (67.9 ) (76.0 ) 1,266.4 1,306.4 Nine months ended Sep 30, Net interest income (2) $ 21,879 21,419 13,951 14,253 3,325 3,489 (1,804 ) (1,917 ) 37,351 37,244 Provision (reversal of provision) for credit losses 1,249 1,919 (30 ) (39 ) (2 ) 2 6 (5 ) 1,223 1,877 Noninterest income 13,573 13,879 7,829 8,307 9,094 9,250 (2,419 ) (2,341 ) 28,077 29,095 Noninterest expense 23,459 22,399 12,132 12,437 9,894 9,377 (2,698 ) (2,529 ) 42,787 41,684 Income (loss) before income tax expense (benefit) 10,744 10,980 9,678 10,162 2,527 3,360 (1,531 ) (1,724 ) 21,418 22,778 Income tax expense (benefit) 3,147 3,316 1,302 2,642 630 1,255 (383 ) (654 ) 4,696 6,559 Net income (loss) before noncontrolling interests 7,597 7,664 8,376 7,520 1,897 2,105 (1,148 ) (1,070 ) 16,722 16,219 Less: Net income (loss) from noncontrolling interests 372 198 15 (21 ) 6 10 — — 393 187 Net income (loss) (3) $ 7,225 7,466 8,361 7,541 1,891 2,095 (1,148 ) (1,070 ) 16,329 16,032 Average loans $ 465.0 476.5 464.2 466.3 74.4 71.6 (58.8 ) (56.8 ) 944.8 957.6 Average assets 1,040.2 1,089.6 827.6 817.9 84.0 82.5 (59.6 ) (57.8 ) 1,892.2 1,932.2 Average deposits 756.4 726.8 424.4 463.7 168.2 190.6 (70.8 ) (78.8 ) 1,278.2 1,302.3 (1) Includes the elimination of certain items that are included in more than one business segment, most of which represents products and services for Wealth and Investment Management customers served through Community Banking distribution channels. (2) Net interest income is the difference between interest earned on assets and the cost of liabilities to fund those assets. Interest earned includes actual interest earned on segment assets as well as interest credits for any funding of a segment available to be provided to other segments. The cost of liabilities includes actual interest expense on segment liabilities as well as funding charges for any funding provided from other segments. (3) Represents segment net income (loss) for Community Banking; Wholesale Banking; and Wealth and Investment Management segments and Wells Fargo net income for the consolidated company.

Regulatory and Agency Capital_2

Regulatory and Agency Capital Requirements (Tables)	9 Months Ended
	Sep. 30, 2018
Banking and Thrift [Abstract]
Regulatory And Agency Capital Requirements	Table 22.1 presents regulatory capital information for Wells Fargo & Company and the Bank using Basel III, which increased minimum required capital ratios, and introduced a minimum Common Equity Tier 1 (CET1) ratio. We must report the lower of our CET1, tier 1 and total capital ratios calculated under the Standardized Approach and under the Advanced Approach in the assessment of our capital adequacy. The Standardized Approach applies assigned risk weights to broad risk categories, while the calculation of risk-weighted assets (RWAs) under the Advanced Approach differs by requiring applicable banks to utilize a risk-sensitive methodology, which relies upon the use of internal credit models, and includes an operational risk component. The Basel III capital rules are being phased-in effective January 1, 2014, through the end of 2021. Beginning January 1, 2018, the requirements for calculating CET1 and tier 1 capital, along with RWAs, became fully phased-in. Accordingly, the information presented reflects fully phased-in CET1 capital, tier 1 capital, and RWAs, but reflects total capital still in accordance with Transition Requirements . The Bank is an approved seller/servicer of mortgage loans and is required to maintain minimum levels of shareholders’ equity, as specified by various agencies, including the United States Department of Housing and Urban Development, GNMA, FHLMC and FNMA. At September 30, 2018 , the Bank met these requirements. Other subsidiaries, including the Company’s insurance and broker-dealer subsidiaries, are also subject to various minimum capital levels, as defined by applicable industry regulations. The minimum capital levels for these subsidiaries, and related restrictions, are not significant to our consolidated operations. Table 22.1: Regulatory Capital Information Wells Fargo & Company Wells Fargo Bank, N.A. September 30, 2018 December 31, 2017 September 30, 2018 December 31, 2017 (in millions, except ratios) Advanced Approach Standardized Approach Advanced Approach Standardized Advanced Approach Standardized Advanced Approach Standardized Regulatory capital: Common equity tier 1 $ 148,855 148,855 154,765 154,765 141,459 141,459 143,292 143,292 Tier 1 170,342 170,342 178,209 178,209 141,459 141,459 143,292 143,292 Total 201,616 209,924 210,333 220,097 154,468 162,353 156,661 165,734 Assets: Risk-weighted $ 1,189,464 1,250,215 1,199,545 1,260,663 1,082,515 1,162,179 1,090,360 1,169,863 Adjusted average (1) 1,847,338 1,847,338 1,905,568 1,905,568 1,647,541 1,647,541 1,708,828 1,708,828 Regulatory capital ratios: Common equity tier 1 capital 12.51 % 11.91 * 12.90 12.28 * 13.07 12.17 * 13.14 12.25 * Tier 1 capital 14.32 13.63 * 14.86 14.14 * 13.07 12.17 * 13.14 12.25 * Total capital 16.95 16.79 * 17.53 17.46 * 14.27 13.97 * 14.37 14.17 * Tier 1 leverage (1) 9.22 9.22 9.35 9.35 8.59 8.59 8.39 8.39 *Denotes the lowest capital ratio as determined under the Advanced and Standardized Approaches. (1) The leverage ratio consists of Tier 1 capital divided by quarterly average total assets, excluding goodwill and certain other items.
Minimum Required Regulatory Capital Ratios (Transition Requirements) [Table Text Block]	Table 22.2 presents the minimum required regulatory capital ratios under Transition Requirements to which the Company and the Bank were subject as of September 30, 2018 and December 31, 2017 . Table 22.2: Minimum Required Regulatory Capital Ratios – Transition Requirements (1) Wells Fargo & Company Wells Fargo Bank, N.A. September 30, 2018 December 31, 2017 September 30, 2018 December 31, 2017 Regulatory capital ratios: Common equity tier 1 capital 7.875 % 6.750 6.375 5.750 Tier 1 capital 9.375 8.250 7.875 7.250 Total capital 11.375 10.250 9.875 9.250 Tier 1 leverage 4.000 4.000 4.000 4.000 (1) At September 30, 2018 , under transition requirements, the CET1, tier 1 and total capital minimum ratio requirements for Wells Fargo & Company include a capital conservation buffer of 1.875% and a global systemically important bank (G-SIB) surcharge of 1.500% . Only the 1.875% capital conservation buffer applies to the Bank at September 30, 2018 .

Summary of Significant Accoun_4

Summary of Significant Accounting Policies (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2018		Sep. 30, 2018		Sep. 30, 2017	Mar. 31, 2018	Jan. 01, 2018	Dec. 31, 2017
Supplemental cash flow information - Noncash activities
Trading debt securities retained from securitization of MLHFS				$ 28,761		$ 43,394
Transfers from loans to MLHFS				4,456		4,015
Transfer of Portfolio Loans and Leases to Held-for-sale				2,542		681
Transfers from available-for-sale debt securities to held-to-maturity debt securities				13,372		50,405
Private Forward Repurchase Transaction [Member]
Summary Of Significant Accounting Policies Textuals [Abstract]
Private forward repurchase contract		$ 0		0		$ 0
Accounting Standards Update 2016-04 [Member] | Retained Earnings [Member]
Summary of Significant Accounting Policies [Line Items]
Cumulative Effect of New Accounting Principle							$ 20
Accounting Standards Update 2016-01 [Member]
Summary of Significant Accounting Policies [Line Items]
Cumulative Effect of New Accounting Principle	[1]								$ (24)
Accounting Standards Update 2016-01 [Member] | Retained Earnings [Member]
Summary of Significant Accounting Policies [Line Items]
Cumulative Effect of New Accounting Principle								$ 106	$ 94	[1]
Accounting Standards Update 2016-01 [Member] | Other Comprehensive Income Location [Domain]
Summary of Significant Accounting Policies [Line Items]
Adoption of accounting standard				118
Accounting Standards Update 2014-09 [Member] | Retained Earnings [Member]
Summary of Significant Accounting Policies [Line Items]
Cumulative Effect of New Accounting Principle							$ (32)
Accounting Standards Update 2018-02 [Member]
Summary of Significant Accounting Policies [Line Items]
Adoption of accounting standard		0	[2]	0	[3]
Accounting Standards Update 2018-02 [Member] | Retained Earnings [Member]
Summary of Significant Accounting Policies [Line Items]
Adoption of accounting standard		$ 400	[2]	400	[3]
Auction Rate Securities [Member] | Accounting Standards Update 2016-01 [Member]
Summary of Significant Accounting Policies [Line Items]
Adoption of accounting standard				12
Tax Expense [Member] | Accounting Standards Update 2018-02 [Member]
Summary of Significant Accounting Policies [Line Items]
Adoption of accounting standard				$ 104
[1]	Effective January 1, 2018, we adopted ASU 2016-04 – Liabilities – Extinguishments of Liabilities (Subtopic 405-20): Recognition of Breakage for Certain Prepaid Stored-Value Products, ASU 2016-01 – Financial Instruments – Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities, and ASU 2014-09 – Revenue from Contracts With Customers (Topic 606) and subsequent related Updates. See Note 1 (Summary of Significant Accounting Policies) in this Report for more information.
[2]	Represents the reclassification from other comprehensive income to retained earnings as a result of the adoption of ASU 2018-02 - Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income, in the third quarter of 2018. For additional information, see Note 1.
[3]	(2)Represents the reclassification from other comprehensive income to retained earnings as a result of the adoption of ASU 2018-02 - Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income, in the third quarter of 2018. For additional information, see Note 1.

Business Combinations (Details)

Business Combinations (Details) $ in Billions	9 Months Ended
	Sep. 30, 2018USD ($)business
Business Acquisitions and DIvestitures [Line Items]
Business acquisition, number completed during period	0
Pending Acquisition [Member]
Business Acquisitions and DIvestitures [Line Items]
Business acquisition, number completed during period	0
Pending Acquisition [Member]
Business Acquisitions and DIvestitures [Line Items]
Business Divestitures, Branches Divested	52
Business Divestitures, Deposit Divested | $	$ 2

Cash, Loan and Dividend Restr_3

Cash, Loan and Dividend Restrictions (Details) - USD ($) $ / shares in Units, $ in Millions	Oct. 23, 2018	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Cash, Loan and Dividend Restrictions [Line Items]
Average Cash Reserve Deposit Required And Made Federal Reserve Banks				$ 12,798		$ 12,306
Common Stock, Dividends, Per Share, Declared		$ 0.430	$ 0.390	$ 1.210	$ 1.150
Reserve Balance for Non-US Central Banks [Member]
Cash, Loan and Dividend Restrictions [Line Items]
Restricted Cash Equivalents		$ 554		$ 554		617
Segregated for benefit brokerage customers under federal and other brokerage regulations f[Member]
Cash, Loan and Dividend Restrictions [Line Items]
Restricted Cash Equivalents		698		698		666
Related to consolidated variable interest entities (VIEs) that can only be used to settle liabilities of VIEs [Member]
Cash, Loan and Dividend Restrictions [Line Items]
Restricted Cash Equivalents		120		120		$ 487
Bank Subsidiaries [Member]
Cash, Loan and Dividend Restrictions [Line Items]
Statutory Accounting Practices, Statutory Amount Available for Dividend Payments without Regulatory Approval		15,600		15,600
Nonbank Subsidiaries [Member]
Cash, Loan and Dividend Restrictions [Line Items]
Statutory Accounting Practices, Statutory Amount Available for Dividend Payments without Regulatory Approval		$ 25,500		$ 25,500
Subsequent Event [Member]
Cash, Loan and Dividend Restrictions [Line Items]
Common Stock, Dividends, Per Share, Declared	$ 0.43

Trading Assets and Liabilities

Trading Assets and Liabilities (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Trading Assets and Liabilities [Line Items]
Trading debt securities	$ 65,188	$ 57,624	[1]
Trading equity securities	26,138	30,004
Loans held for sale	1,765	1,131	[1]
Derivative assets	34,779	36,355
Net amounts in consolidated balance sheet, assets	11,811	12,228
Total trading assets	103,706	100,362
Gross trading derivative liabilities	32,670	34,298
Net amounts in consolidated balance sheet, liabilities	8,586	8,796
Total trading liabilities	31,418	26,796
Held for Trading [Member]
Trading Assets and Liabilities [Line Items]
Loans held for sale	1,266	1,023
Derivative assets	30,302	31,340
Netting, derivative assets (1)	(19,188)	(19,629)
Net amounts in consolidated balance sheet, assets	11,114	11,711
Short sales	23,992	18,472
Gross trading derivative liabilities	29,268	31,386
Netting, derivative liabilities (1)	(21,842)	(23,062)
Net amounts in consolidated balance sheet, liabilities	$ 7,426	$ 8,324
[1]	(2)Financial information for the prior period has been revised to reflect the impact of the adoption in first quarter 2018 of ASU 2016-01 – Financial Instruments – Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities. See Note 1 (Summary of Significant Accounting Policies) for more information.

Net Interest Income and Net Gai

Net Interest Income and Net Gains (Losses) on Trading Activities (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017		Sep. 30, 2018	Sep. 30, 2017
Net Interest Income and Net Gains (Losses) on Trading Activities [Line Items]
Debt Securities, interest income	$ 723	$ 607		$ 2,043	$ 1,678
Equity Securities, interest income	280	186	[1]	732	560	[1]
Loans held for sale, interest income	35	15	[1]	107	38	[1]
Total interest income	16,364	15,044	[2]	47,726	43,951	[2]
Total interest expense	157	107		429	305
Net interest income	12,572	12,449	[2]	37,351	37,244	[2]
Debt securities, net gains (losses)	(369)	52		(1,008)	348
Equity securities, net gains (losses)	1,129	717		25	2,143
Loans held for sale, net gain (losses)	3	6		18	42
Derivatives (3)	(605)	(655)		1,557	(1,990)
Net gains from trading activities (1)	158	120	[1]	592	543	[1]
Total trading-related net interest and noninterest income	922	756		2,696	2,315
Held for Trading [Member]
Net Interest Income and Net Gains (Losses) on Trading Activities [Line Items]
Equity Securities, interest income	178	125		447	370
Loans held for sale, interest income	20	11		43	29
Total interest income	921	743		2,533	2,077
Net interest income	$ 764	$ 636		$ 2,104	$ 1,772
[1]	(1)Financial information for the prior periods has been revised to reflect the impact of the adoption in first quarter 2018 of Accounting Standards Update (ASU) 2016-01 – Financial Instruments – Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities. See Note 1 (Summary of Significant Accounting Policies) for more information.
[2]	(2)Financial information for the prior period has been revised to reflect the impact of the adoption of ASU 2017-12 – Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities, effective January 1, 2017.

AFS and HTM Debt Securities, Ma

AFS and HTM Debt Securities, Major Categories (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Available-for-sale debt securities:
Amortized Cost	$ 266,722	$ 275,096
Gross unrealized gains	2,152	3,182
Gross unrealized losses	(5,910)	(1,871)
Fair value	262,964	276,407	[1]
Held-to-maturity debt securities:
Held-to-maturity securities, Amortized Cost	144,131	139,335
Gross unrealized gains	22	478
Gross unrealized losses	(5,117)	(828)
Held-to-maturity, at fair value	139,036	138,985
Total investment securities:
Amortized Cost	410,853	414,431
Gross unrealized gains	2,174	3,660
Gross unrealized losses	(11,027)	(2,699)
Fair value	402,000	415,392
Held-to-maturity, at fair value	139,036	138,985
Securities of U.S. Treasury and federal agencies [Member]
Available-for-sale debt securities:
Amortized Cost	6,347	6,425
Gross unrealized gains	1	2
Gross unrealized losses	(161)	(108)
Fair value	6,187	6,319
Held-to-maturity debt securities:
Held-to-maturity securities, Amortized Cost	44,743	44,720
Gross unrealized gains	0	189
Gross unrealized losses	(1,075)	(103)
Held-to-maturity, at fair value	43,668	44,806
Total investment securities:
Held-to-maturity, at fair value	43,668	44,806
Collateralized Debt Obligations [Member]
Available-for-sale debt securities:
Amortized Cost	690	887
Fair value	843	1,000
Asset-backed Securities, Securitized Loans and Receivables [Member]
Held-to-maturity debt securities:
Held-to-maturity securities, Amortized Cost	0	114
Held-to-maturity, at fair value	0	114
Total investment securities:
Held-to-maturity, at fair value	0	114
Securities of U.S. states and political subdivisions [Member]
Available-for-sale debt securities:
Amortized Cost	47,565	50,733
Gross unrealized gains	984	1,032
Gross unrealized losses	(333)	(439)
Fair value	48,216	51,326
Held-to-maturity debt securities:
Held-to-maturity securities, Amortized Cost	6,293	6,313
Gross unrealized gains	15	84
Gross unrealized losses	(157)	(43)
Held-to-maturity, at fair value	6,151	6,354
Total investment securities:
Held-to-maturity, at fair value	6,151	6,354
Securities of U.S. states and political subdivisions [Member] | Nontaxable Preferred Debt Securities [Member]
Available-for-sale debt securities:
Amortized Cost	6,200	5,200
Fair value	6,200	5,200
Federal agencies [Member]
Available-for-sale debt securities:
Amortized Cost	158,584	160,561
Gross unrealized gains	289	930
Gross unrealized losses	(5,362)	(1,272)
Fair value	153,511	160,219
Held-to-maturity debt securities:
Held-to-maturity securities, Amortized Cost	93,020	87,527
Gross unrealized gains	7	201
Gross unrealized losses	(3,885)	(682)
Held-to-maturity, at fair value	89,142	87,046
Total investment securities:
Held-to-maturity, at fair value	89,142	87,046
Residential [Member]
Available-for-sale debt securities:
Amortized Cost	2,789	4,356
Gross unrealized gains	179	254
Gross unrealized losses	(2)	(2)
Fair value	2,966	4,608
Commercial [Member]
Available-for-sale debt securities:
Amortized Cost	3,910	4,487
Gross unrealized gains	67	80
Gross unrealized losses	(4)	(2)
Fair value	3,973	4,565
Mortgage-Backed Securities [Member]
Available-for-sale debt securities:
Amortized Cost	165,283	169,404
Gross unrealized gains	535	1,264
Gross unrealized losses	(5,368)	(1,276)
Fair value	160,450	169,392
Corporate debt securities [Member]
Available-for-sale debt securities:
Amortized Cost	6,365	7,343
Gross unrealized gains	273	363
Gross unrealized losses	(24)	(40)
Fair value	6,614	7,666
Collateralized Loan Obligations [Member]
Available-for-sale debt securities:
Amortized Cost	35,973	35,675
Gross unrealized gains	239	384
Gross unrealized losses	(18)	(3)
Fair value	36,194	36,056
Held-to-maturity debt securities:
Held-to-maturity securities, Amortized Cost	75	661
Gross unrealized gains	0	4
Gross unrealized losses	0	0
Held-to-maturity, at fair value	75	665
Total investment securities:
Held-to-maturity, at fair value	75	665
Other [Member]
Available-for-sale debt securities:
Amortized Cost	5,189	5,516
Gross unrealized gains	120	137
Gross unrealized losses	(6)	(5)
Fair value	5,303	5,648
Held-to-maturity debt securities:
Held-to-maturity securities, Amortized Cost	0	114
Gross unrealized gains	0	0
Gross unrealized losses	0	0
Held-to-maturity, at fair value	0	114
Total investment securities:
Held-to-maturity, at fair value	$ 0	$ 114
[1]	(2)Financial information for the prior period has been revised to reflect the impact of the adoption in first quarter 2018 of ASU 2016-01 – Financial Instruments – Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities. See Note 1 (Summary of Significant Accounting Policies) for more information.

AFS and HTM Debt Securities, Gr

AFS and HTM Debt Securities, Gross Unrealized Losses and Fair Value (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Available-for-sale debt securities:
Less than 12 months, Gross unrealized losses, available-for-sale	$ (2,258)	$ (295)
Less than 12 months, Fair value, available-for-sale	102,353	63,600
12 months or more, Gross unrealized losses, available-for-sale	(3,652)	(1,576)
12 months or more, Fair value, available-for-sale	76,886	59,989
Total, Gross unrealized losses, available-for-sale	(5,910)	(1,871)
Total Fair Value, available for sale	179,239	123,589
Held-to-maturity debt securities:
Less than 12 months, Gross unrealized losses, held-to-maturity	(2,099)	(272)
Less than 12 months, Fair value, held-to-maturity	79,712	41,468
12 months or more, Gross unrealized losses, held-to-maturity	(3,018)	(556)
12 months or more, Fair value, held-to-maturity	56,550	31,417
Total, Gross unrealized losses, held-to-maturity	(5,117)	(828)
Total, Fair value, held-to-maturity	136,262	72,885
Total AFS and HTM debt securities:
Less than 12 months, Gross unrealized losses, investment securities	(4,357)	(567)
Less than 12 months, Fair value, investment securities	182,065	105,068
12 months or more, Gross unrealized losses, investment securities	(6,670)	(2,132)
12 months or more, Fair value, investment securities	133,436	91,406
Total, Gross unrealized losses, investment securities	(11,027)	(2,699)
Total, Fair value, investment securities	315,501	196,474
Securities of U.S. Treasury and federal agencies [Member]
Available-for-sale debt securities:
Less than 12 months, Gross unrealized losses, available-for-sale	(32)	(27)
Less than 12 months, Fair value, available-for-sale	1,705	4,065
12 months or more, Gross unrealized losses, available-for-sale	(129)	(81)
12 months or more, Fair value, available-for-sale	4,444	2,209
Total, Gross unrealized losses, available-for-sale	(161)	(108)
Total Fair Value, available for sale	6,149	6,274
Held-to-maturity debt securities:
Less than 12 months, Gross unrealized losses, held-to-maturity	(871)	(69)
Less than 12 months, Fair value, held-to-maturity	39,298	11,255
12 months or more, Gross unrealized losses, held-to-maturity	(204)	(34)
12 months or more, Fair value, held-to-maturity	4,370	1,490
Total, Gross unrealized losses, held-to-maturity	(1,075)	(103)
Total, Fair value, held-to-maturity	43,668	12,745
Securities of U.S. states and political subdivisions [Member]
Available-for-sale debt securities:
Less than 12 months, Gross unrealized losses, available-for-sale	(26)	(17)
Less than 12 months, Fair value, available-for-sale	7,207	6,179
12 months or more, Gross unrealized losses, available-for-sale	(307)	(422)
12 months or more, Fair value, available-for-sale	8,737	11,766
Total, Gross unrealized losses, available-for-sale	(333)	(439)
Total Fair Value, available for sale	15,944	17,945
Held-to-maturity debt securities:
Less than 12 months, Gross unrealized losses, held-to-maturity	(62)	(5)
Less than 12 months, Fair value, held-to-maturity	3,101	500
12 months or more, Gross unrealized losses, held-to-maturity	(95)	(38)
12 months or more, Fair value, held-to-maturity	1,922	1,683
Total, Gross unrealized losses, held-to-maturity	(157)	(43)
Total, Fair value, held-to-maturity	5,023	2,183
Mortgage-Backed Securities [Member]
Available-for-sale debt securities:
Less than 12 months, Gross unrealized losses, available-for-sale	(2,169)	(245)
Less than 12 months, Fair value, available-for-sale	83,582	52,707
12 months or more, Gross unrealized losses, available-for-sale	(3,199)	(1,031)
12 months or more, Fair value, available-for-sale	63,141	44,882
Total, Gross unrealized losses, available-for-sale	(5,368)	(1,276)
Total Fair Value, available for sale	146,723	97,589
Federal agencies [Member]
Available-for-sale debt securities:
Less than 12 months, Gross unrealized losses, available-for-sale	(2,165)	(243)
Less than 12 months, Fair value, available-for-sale	82,975	52,559
12 months or more, Gross unrealized losses, available-for-sale	(3,197)	(1,029)
12 months or more, Fair value, available-for-sale	63,029	44,691
Total, Gross unrealized losses, available-for-sale	(5,362)	(1,272)
Total Fair Value, available for sale	146,004	97,250
Held-to-maturity debt securities:
Less than 12 months, Gross unrealized losses, held-to-maturity	(1,166)	(198)
Less than 12 months, Fair value, held-to-maturity	37,313	29,713
12 months or more, Gross unrealized losses, held-to-maturity	(2,719)	(484)
12 months or more, Fair value, held-to-maturity	50,258	28,244
Total, Gross unrealized losses, held-to-maturity	(3,885)	(682)
Total, Fair value, held-to-maturity	87,571	57,957
Residential [Member]
Available-for-sale debt securities:
Less than 12 months, Gross unrealized losses, available-for-sale	(1)	(1)
Less than 12 months, Fair value, available-for-sale	169	47
12 months or more, Gross unrealized losses, available-for-sale	(1)	(1)
12 months or more, Fair value, available-for-sale	52	58
Total, Gross unrealized losses, available-for-sale	(2)	(2)
Total Fair Value, available for sale	221	105
Commercial [Member]
Available-for-sale debt securities:
Less than 12 months, Gross unrealized losses, available-for-sale	(3)	(1)
Less than 12 months, Fair value, available-for-sale	438	101
12 months or more, Gross unrealized losses, available-for-sale	(1)	(1)
12 months or more, Fair value, available-for-sale	60	133
Total, Gross unrealized losses, available-for-sale	(4)	(2)
Total Fair Value, available for sale	498	234
Corporate debt securities [Member]
Available-for-sale debt securities:
Less than 12 months, Gross unrealized losses, available-for-sale	(12)	(4)
Less than 12 months, Fair value, available-for-sale	658	239
12 months or more, Gross unrealized losses, available-for-sale	(12)	(36)
12 months or more, Fair value, available-for-sale	246	503
Total, Gross unrealized losses, available-for-sale	(24)	(40)
Total Fair Value, available for sale	904	742
Collateralized loan and other debt obligations [Member]
Available-for-sale debt securities:
Less than 12 months, Gross unrealized losses, available-for-sale	(17)	(1)
Less than 12 months, Fair value, available-for-sale	8,725	373
12 months or more, Gross unrealized losses, available-for-sale	(1)	(2)
12 months or more, Fair value, available-for-sale	165	146
Total, Gross unrealized losses, available-for-sale	(18)	(3)
Total Fair Value, available for sale	8,890	519
Held-to-maturity debt securities:
Less than 12 months, Gross unrealized losses, held-to-maturity	0	0
Less than 12 months, Fair value, held-to-maturity	0	0
12 months or more, Gross unrealized losses, held-to-maturity	0	0
12 months or more, Fair value, held-to-maturity	0	0
Total, Gross unrealized losses, held-to-maturity	0	0
Total, Fair value, held-to-maturity	0	0
Other [Member]
Available-for-sale debt securities:
Less than 12 months, Gross unrealized losses, available-for-sale	(2)	(1)
Less than 12 months, Fair value, available-for-sale	476	37
12 months or more, Gross unrealized losses, available-for-sale	(4)	(4)
12 months or more, Fair value, available-for-sale	153	483
Total, Gross unrealized losses, available-for-sale	(6)	(5)
Total Fair Value, available for sale	$ 629	$ 520

AFS and HTM Debt Securities, Un

AFS and HTM Debt Securities, Unrealized Loss Position, by Credit Rating (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Available-for-sale debt securities:
Gross unrealized losses	$ (5,910)	$ (1,871)
Fair value	262,964	276,407	[1]
Held-to-maturity debt securities:
Gross unrealized losses	(5,117)	(828)
Fair value	139,036	138,985
Total AFS and HTM debt securities:
Gross unrealized losses	(11,027)	(2,699)
Fair value	402,000	415,392
Securities of U.S. Treasury and federal agencies [Member]
Available-for-sale debt securities:
Gross unrealized losses	(161)	(108)
Fair value	6,187	6,319
Held-to-maturity debt securities:
Gross unrealized losses	(1,075)	(103)
Fair value	43,668	44,806
Securities of U.S. states and political subdivisions [Member]
Available-for-sale debt securities:
Gross unrealized losses	(333)	(439)
Fair value	48,216	51,326
Held-to-maturity debt securities:
Gross unrealized losses	(157)	(43)
Fair value	6,151	6,354
Mortgage-Backed Securities [Member]
Available-for-sale debt securities:
Gross unrealized losses	(5,368)	(1,276)
Fair value	160,450	169,392
Federal agencies [Member]
Available-for-sale debt securities:
Gross unrealized losses	(5,362)	(1,272)
Fair value	153,511	160,219
Held-to-maturity debt securities:
Gross unrealized losses	(3,885)	(682)
Fair value	89,142	87,046
Residential [Member]
Available-for-sale debt securities:
Gross unrealized losses	(2)	(2)
Fair value	2,966	4,608
Commercial [Member]
Available-for-sale debt securities:
Gross unrealized losses	(4)	(2)
Fair value	3,973	4,565
Corporate debt securities [Member]
Available-for-sale debt securities:
Gross unrealized losses	(24)	(40)
Fair value	6,614	7,666
Collateralized loan and other debt obligations [Member]
Available-for-sale debt securities:
Gross unrealized losses	(18)	(3)
Fair value	36,194	36,056
Held-to-maturity debt securities:
Gross unrealized losses	0	0
Fair value	75	665
Other [Member]
Available-for-sale debt securities:
Gross unrealized losses	(6)	(5)
Fair value	5,303	5,648
Held-to-maturity debt securities:
Gross unrealized losses	0	0
Fair value	0	114
Unrated Investment Grade Securities [Member]
Total AFS and HTM debt securities:
Gross unrealized losses	(23)	(32)
Fair value	5,500	6,900
Investment grade [Member]
Available-for-sale debt securities:
Gross unrealized losses	(5,864)	(1,812)
Fair value	177,914	122,804
Held-to-maturity debt securities:
Gross unrealized losses	(5,105)	(826)
Fair value	135,879	72,717
Total AFS and HTM debt securities:
Gross unrealized losses	(10,969)	(2,638)
Fair value	313,793	195,521
Investment grade [Member] | Securities of U.S. Treasury and federal agencies [Member]
Available-for-sale debt securities:
Gross unrealized losses	(161)	(108)
Fair value	6,149	6,274
Held-to-maturity debt securities:
Gross unrealized losses	(1,075)	(103)
Fair value	43,668	12,745
Investment grade [Member] | Securities of U.S. states and political subdivisions [Member]
Available-for-sale debt securities:
Gross unrealized losses	(314)	(412)
Fair value	15,661	17,763
Held-to-maturity debt securities:
Gross unrealized losses	(157)	(43)
Fair value	5,023	2,183
Investment grade [Member] | Mortgage-Backed Securities [Member]
Available-for-sale debt securities:
Gross unrealized losses	(5,364)	(1,274)
Fair value	146,580	97,475
Investment grade [Member] | Federal agencies [Member]
Available-for-sale debt securities:
Gross unrealized losses	(5,362)	(1,272)
Fair value	146,004	97,250
Held-to-maturity debt securities:
Gross unrealized losses	(3,873)	(680)
Fair value	87,188	57,789
Investment grade [Member] | Residential [Member]
Available-for-sale debt securities:
Gross unrealized losses	(1)	(1)
Fair value	147	42
Investment grade [Member] | Commercial [Member]
Available-for-sale debt securities:
Gross unrealized losses	(1)	(1)
Fair value	429	183
Investment grade [Member] | Corporate debt securities [Member]
Available-for-sale debt securities:
Gross unrealized losses	(4)	(13)
Fair value	276	304
Investment grade [Member] | Collateralized loan and other debt obligations [Member]
Available-for-sale debt securities:
Gross unrealized losses	(18)	(3)
Fair value	8,890	519
Held-to-maturity debt securities:
Gross unrealized losses	0	0
Fair value	0	0
Investment grade [Member] | Other [Member]
Available-for-sale debt securities:
Gross unrealized losses	(3)	(2)
Fair value	358	469
Non-investment grade [Member]
Available-for-sale debt securities:
Gross unrealized losses	(46)	(59)
Fair value	1,325	785
Held-to-maturity debt securities:
Gross unrealized losses	(12)	(2)
Fair value	383	168
Total AFS and HTM debt securities:
Gross unrealized losses	(58)	(61)
Fair value	1,708	953
Non-investment grade [Member] | Securities of U.S. Treasury and federal agencies [Member]
Available-for-sale debt securities:
Gross unrealized losses	0	0
Fair value	0	0
Held-to-maturity debt securities:
Gross unrealized losses	0	0
Fair value	0	0
Non-investment grade [Member] | Securities of U.S. states and political subdivisions [Member]
Available-for-sale debt securities:
Gross unrealized losses	(19)	(27)
Fair value	283	182
Held-to-maturity debt securities:
Gross unrealized losses	0	0
Fair value	0	0
Non-investment grade [Member] | Mortgage-Backed Securities [Member]
Available-for-sale debt securities:
Gross unrealized losses	(4)	(2)
Fair value	143	114
Non-investment grade [Member] | Federal agencies [Member]
Available-for-sale debt securities:
Gross unrealized losses	0	0
Fair value	0	0
Held-to-maturity debt securities:
Gross unrealized losses	(12)	(2)
Fair value	383	168
Non-investment grade [Member] | Residential [Member]
Available-for-sale debt securities:
Gross unrealized losses	(1)	(1)
Fair value	74	63
Non-investment grade [Member] | Commercial [Member]
Available-for-sale debt securities:
Gross unrealized losses	(3)	(1)
Fair value	69	51
Non-investment grade [Member] | Corporate debt securities [Member]
Available-for-sale debt securities:
Gross unrealized losses	(20)	(27)
Fair value	628	438
Non-investment grade [Member] | Collateralized loan and other debt obligations [Member]
Available-for-sale debt securities:
Gross unrealized losses	0	0
Fair value	0	0
Held-to-maturity debt securities:
Gross unrealized losses	0	0
Fair value	0	0
Non-investment grade [Member] | Other [Member]
Available-for-sale debt securities:
Gross unrealized losses	(3)	(3)
Fair value	$ 271	$ 51
[1]	(2)Financial information for the prior period has been revised to reflect the impact of the adoption in first quarter 2018 of ASU 2016-01 – Financial Instruments – Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities. See Note 1 (Summary of Significant Accounting Policies) for more information.

AFS and HTM Debt Securities, Co

AFS and HTM Debt Securities, Contractual Maturities (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Available-for-sale securities:
Contractual maturities, Total amount, available-for-sale	$ 262,964	$ 276,407	[1]
Weighted average yield contractual maturities, Total, available-for-sale	3.68%	3.72%
Due within 1 year, Contractual maturities, available-for-sale	$ 4,653	$ 2,990
Percentage of weighted average yield, Due within 1 year, available-for-sale	2.99%	3.70%
Due in 1-5 years, Contractual maturities, available-for-sale	$ 16,052	$ 19,158
Percentage of weighted average yield, Due in 1-5 years, available-for-sale	2.99%	3.11%
Due in 5-10 years, Contractual maturities, available-for-sale	$ 21,695	$ 28,059
Percentage of weighted average yield, Due In 5-10 years, available-for-sale	3.62%	3.24%
Due in 10 years or more, Contractual maturities, available-for-sale	$ 220,564	$ 226,200
Percentage of weighted average yield, Due after 10 years, available-for-sale	3.76%	3.83%
Held-to-maturity securities:
Held-to-maturity securities, Amortized Cost	$ 144,131	$ 139,335
Weighted average yield contractual maturities, Total, held-to-maturity, cost	2.87%	2.92%
Due within 1 year, Contractual maturities, held-to-maturity, cost	$ 0	$ 0
Percentage of weighted average yield, Due In 1 year, held-to-maturity, cost	0.00%	0.00%
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Amortized Cost	$ 32,416	$ 32,509
Percentage of weighted average yield, Due In 1-5 years, held-to-maturity, cost	2.05%	2.05%
Due in 5-10 years, Contractual maturities, held-to-maturity, cost	$ 13,598	$ 13,757
Percentage of weighted average yield, Due In 5-10 years, held-to-maturity, cost	2.54%	2.55%
Due in 10 years or more, Contractual maturities, held-to-maturity, cost	$ 98,117	$ 93,069
Percentage of weighted average yield, Due after 10 years, held-to-maturity, cost	3.19%	3.28%
Held-to-maturity securities, fair value: [Abstract]
Contractual maturities, Total amount, held-to-maturity, fair value	$ 139,036	$ 138,985
Due within 1 year, Contractual maturities, held-to-maturity, fair value	0	0
Due in 1-5 years, Contractual maturities, held-to-maturity, fair value	31,765	32,566
Due in 5-10 years, Contractual maturities, held-to-maturity, fair value	13,165	13,795
Due in 10 years or more, Contractual maturities, held-to-maturity, fair value	94,106	92,624
Securities of U.S. Treasury and federal agencies [Member]
Available-for-sale securities:
Contractual maturities, Total amount, available-for-sale	$ 6,187	$ 6,319
Weighted average yield contractual maturities, Total, available-for-sale	1.60%	1.59%
Due within 1 year, Contractual maturities, available-for-sale	$ 46	$ 81
Percentage of weighted average yield, Due within 1 year, available-for-sale	1.96%	1.37%
Due in 1-5 years, Contractual maturities, available-for-sale	$ 6,094	$ 6,189
Percentage of weighted average yield, Due in 1-5 years, available-for-sale	1.59%	1.59%
Due in 5-10 years, Contractual maturities, available-for-sale	$ 47	$ 49
Percentage of weighted average yield, Due In 5-10 years, available-for-sale	1.89%	1.89%
Due in 10 years or more, Contractual maturities, available-for-sale	$ 0	$ 0
Percentage of weighted average yield, Due after 10 years, available-for-sale	0.00%	0.00%
Held-to-maturity securities:
Held-to-maturity securities, Amortized Cost	$ 44,743	$ 44,720
Weighted average yield contractual maturities, Total, held-to-maturity, cost	2.12%	2.12%
Due within 1 year, Contractual maturities, held-to-maturity, cost	$ 0	$ 0
Percentage of weighted average yield, Due In 1 year, held-to-maturity, cost	0.00%	0.00%
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Amortized Cost	$ 32,349	$ 32,330
Percentage of weighted average yield, Due In 1-5 years, held-to-maturity, cost	2.04%	2.04%
Due in 5-10 years, Contractual maturities, held-to-maturity, cost	$ 12,394	$ 12,390
Percentage of weighted average yield, Due In 5-10 years, held-to-maturity, cost	2.32%	2.32%
Due in 10 years or more, Contractual maturities, held-to-maturity, cost	$ 0	$ 0
Percentage of weighted average yield, Due after 10 years, held-to-maturity, cost	0.00%	0.00%
Held-to-maturity securities, fair value: [Abstract]
Contractual maturities, Total amount, held-to-maturity, fair value	$ 43,668	$ 44,806
Due within 1 year, Contractual maturities, held-to-maturity, fair value	0	0
Due in 1-5 years, Contractual maturities, held-to-maturity, fair value	31,700	32,388
Due in 5-10 years, Contractual maturities, held-to-maturity, fair value	11,968	12,418
Due in 10 years or more, Contractual maturities, held-to-maturity, fair value	0	0
Securities of U.S. states and political subdivisions [Member]
Available-for-sale securities:
Contractual maturities, Total amount, available-for-sale	$ 48,216	$ 51,326
Weighted average yield contractual maturities, Total, available-for-sale	4.73%	5.88%
Due within 1 year, Contractual maturities, available-for-sale	$ 4,216	$ 2,380
Percentage of weighted average yield, Due within 1 year, available-for-sale	2.75%	3.47%
Due in 1-5 years, Contractual maturities, available-for-sale	$ 6,507	$ 9,484
Percentage of weighted average yield, Due in 1-5 years, available-for-sale	3.33%	3.42%
Due in 5-10 years, Contractual maturities, available-for-sale	$ 4,251	$ 2,276
Percentage of weighted average yield, Due In 5-10 years, available-for-sale	3.31%	4.63%
Due in 10 years or more, Contractual maturities, available-for-sale	$ 33,242	$ 37,186
Percentage of weighted average yield, Due after 10 years, available-for-sale	5.43%	6.75%
Held-to-maturity securities:
Held-to-maturity securities, Amortized Cost	$ 6,293	$ 6,313
Weighted average yield contractual maturities, Total, held-to-maturity, cost	4.93%	6.02%
Due within 1 year, Contractual maturities, held-to-maturity, cost	$ 0	$ 0
Percentage of weighted average yield, Due In 1 year, held-to-maturity, cost	0.00%	0.00%
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Amortized Cost	$ 52	$ 50
Percentage of weighted average yield, Due In 1-5 years, held-to-maturity, cost	5.90%	7.18%
Due in 5-10 years, Contractual maturities, held-to-maturity, cost	$ 1,118	$ 695
Percentage of weighted average yield, Due In 5-10 years, held-to-maturity, cost	4.97%	6.31%
Due in 10 years or more, Contractual maturities, held-to-maturity, cost	$ 5,123	$ 5,568
Percentage of weighted average yield, Due after 10 years, held-to-maturity, cost	4.91%	5.98%
Held-to-maturity securities, fair value: [Abstract]
Contractual maturities, Total amount, held-to-maturity, fair value	$ 6,151	$ 6,354
Due within 1 year, Contractual maturities, held-to-maturity, fair value	0	0
Due in 1-5 years, Contractual maturities, held-to-maturity, fair value	50	49
Due in 5-10 years, Contractual maturities, held-to-maturity, fair value	1,111	701
Due in 10 years or more, Contractual maturities, held-to-maturity, fair value	4,990	5,604
Mortgage-Backed Securities [Member]
Available-for-sale securities:
Contractual maturities, Total amount, available-for-sale	$ 160,450	$ 169,392
Weighted average yield contractual maturities, Total, available-for-sale	3.39%	3.28%
Due within 1 year, Contractual maturities, available-for-sale	$ 0	$ 15
Percentage of weighted average yield, Due within 1 year, available-for-sale	0.00%	2.03%
Due in 1-5 years, Contractual maturities, available-for-sale	$ 79	$ 234
Percentage of weighted average yield, Due in 1-5 years, available-for-sale	4.01%	3.35%
Due in 5-10 years, Contractual maturities, available-for-sale	$ 2,714	$ 5,711
Percentage of weighted average yield, Due In 5-10 years, available-for-sale	2.75%	2.82%
Due in 10 years or more, Contractual maturities, available-for-sale	$ 157,657	$ 163,432
Percentage of weighted average yield, Due after 10 years, available-for-sale	3.41%	3.30%
Federal agencies [Member]
Available-for-sale securities:
Contractual maturities, Total amount, available-for-sale	$ 153,511	$ 160,219
Weighted average yield contractual maturities, Total, available-for-sale	3.38%	3.27%
Due within 1 year, Contractual maturities, available-for-sale	$ 0	$ 15
Percentage of weighted average yield, Due within 1 year, available-for-sale	0.00%	2.03%
Due in 1-5 years, Contractual maturities, available-for-sale	$ 63	$ 210
Percentage of weighted average yield, Due in 1-5 years, available-for-sale	3.52%	3.08%
Due in 5-10 years, Contractual maturities, available-for-sale	$ 2,396	$ 5,534
Percentage of weighted average yield, Due In 5-10 years, available-for-sale	2.66%	2.82%
Due in 10 years or more, Contractual maturities, available-for-sale	$ 151,052	$ 154,460
Percentage of weighted average yield, Due after 10 years, available-for-sale	3.39%	3.28%
Held-to-maturity securities:
Held-to-maturity securities, Amortized Cost	$ 93,020	$ 87,527
Weighted average yield contractual maturities, Total, held-to-maturity, cost	3.09%	3.11%
Due within 1 year, Contractual maturities, held-to-maturity, cost	$ 0	$ 0
Percentage of weighted average yield, Due In 1 year, held-to-maturity, cost	0.00%	0.00%
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Amortized Cost	$ 15	$ 15
Percentage of weighted average yield, Due In 1-5 years, held-to-maturity, cost	3.40%	2.81%
Due in 5-10 years, Contractual maturities, held-to-maturity, cost	$ 11	$ 11
Percentage of weighted average yield, Due In 5-10 years, held-to-maturity, cost	3.10%	2.49%
Due in 10 years or more, Contractual maturities, held-to-maturity, cost	$ 92,994	$ 87,501
Percentage of weighted average yield, Due after 10 years, held-to-maturity, cost	3.09%	3.11%
Held-to-maturity securities, fair value: [Abstract]
Contractual maturities, Total amount, held-to-maturity, fair value	$ 89,142	$ 87,046
Due within 1 year, Contractual maturities, held-to-maturity, fair value	0	0
Due in 1-5 years, Contractual maturities, held-to-maturity, fair value	15	15
Due in 5-10 years, Contractual maturities, held-to-maturity, fair value	11	11
Due in 10 years or more, Contractual maturities, held-to-maturity, fair value	89,116	87,020
Residential [Member]
Available-for-sale securities:
Contractual maturities, Total amount, available-for-sale	$ 2,966	$ 4,608
Weighted average yield contractual maturities, Total, available-for-sale	3.88%	3.52%
Due within 1 year, Contractual maturities, available-for-sale	$ 0	$ 0
Percentage of weighted average yield, Due within 1 year, available-for-sale	0.00%	0.00%
Due in 1-5 years, Contractual maturities, available-for-sale	$ 16	$ 24
Percentage of weighted average yield, Due in 1-5 years, available-for-sale	5.84%	5.67%
Due in 5-10 years, Contractual maturities, available-for-sale	$ 7	$ 11
Percentage of weighted average yield, Due In 5-10 years, available-for-sale	2.77%	2.46%
Due in 10 years or more, Contractual maturities, available-for-sale	$ 2,943	$ 4,573
Percentage of weighted average yield, Due after 10 years, available-for-sale	3.88%	3.51%
Commercial [Member]
Available-for-sale securities:
Contractual maturities, Total amount, available-for-sale	$ 3,973	$ 4,565
Weighted average yield contractual maturities, Total, available-for-sale	3.55%	3.45%
Due within 1 year, Contractual maturities, available-for-sale	$ 0	$ 0
Percentage of weighted average yield, Due within 1 year, available-for-sale	0.00%	0.00%
Due in 1-5 years, Contractual maturities, available-for-sale	$ 0	$ 0
Percentage of weighted average yield, Due in 1-5 years, available-for-sale	0.00%	0.00%
Due in 5-10 years, Contractual maturities, available-for-sale	$ 311	$ 166
Percentage of weighted average yield, Due In 5-10 years, available-for-sale	3.50%	2.69%
Due in 10 years or more, Contractual maturities, available-for-sale	$ 3,662	$ 4,399
Percentage of weighted average yield, Due after 10 years, available-for-sale	3.56%	3.48%
Corporate debt securities [Member]
Available-for-sale securities:
Contractual maturities, Total amount, available-for-sale	$ 6,614	$ 7,666
Weighted average yield contractual maturities, Total, available-for-sale	5.09%	5.12%
Due within 1 year, Contractual maturities, available-for-sale	$ 372	$ 443
Percentage of weighted average yield, Due within 1 year, available-for-sale	5.82%	5.54%
Due in 1-5 years, Contractual maturities, available-for-sale	$ 2,505	$ 2,738
Percentage of weighted average yield, Due in 1-5 years, available-for-sale	5.28%	5.56%
Due in 5-10 years, Contractual maturities, available-for-sale	$ 3,008	$ 3,549
Percentage of weighted average yield, Due In 5-10 years, available-for-sale	4.75%	4.70%
Due in 10 years or more, Contractual maturities, available-for-sale	$ 729	$ 936
Percentage of weighted average yield, Due after 10 years, available-for-sale	5.47%	5.26%
Collateralized loan and other debt obligations [Member]
Available-for-sale securities:
Contractual maturities, Total amount, available-for-sale	$ 36,194	$ 36,056
Weighted average yield contractual maturities, Total, available-for-sale	3.77%	2.98%
Due within 1 year, Contractual maturities, available-for-sale	$ 0	$ 0
Percentage of weighted average yield, Due within 1 year, available-for-sale	0.00%	0.00%
Due in 1-5 years, Contractual maturities, available-for-sale	$ 33	$ 50
Percentage of weighted average yield, Due in 1-5 years, available-for-sale	3.73%	1.68%
Due in 5-10 years, Contractual maturities, available-for-sale	$ 10,592	$ 15,008
Percentage of weighted average yield, Due In 5-10 years, available-for-sale	3.78%	2.96%
Due in 10 years or more, Contractual maturities, available-for-sale	$ 25,569	$ 20,998
Percentage of weighted average yield, Due after 10 years, available-for-sale	3.76%	3.00%
Held-to-maturity securities:
Held-to-maturity securities, Amortized Cost	$ 75	$ 661
Weighted average yield contractual maturities, Total, held-to-maturity, cost	3.52%	2.86%
Due within 1 year, Contractual maturities, held-to-maturity, cost	$ 0	$ 0
Percentage of weighted average yield, Due In 1 year, held-to-maturity, cost	0.00%	0.00%
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Amortized Cost	$ 0	$ 0
Percentage of weighted average yield, Due In 1-5 years, held-to-maturity, cost	0.00%	0.00%
Due in 5-10 years, Contractual maturities, held-to-maturity, cost	$ 75	$ 661
Percentage of weighted average yield, Due In 5-10 years, held-to-maturity, cost	3.52%	2.86%
Due in 10 years or more, Contractual maturities, held-to-maturity, cost	$ 0	$ 0
Percentage of weighted average yield, Due after 10 years, held-to-maturity, cost	0.00%	0.00%
Held-to-maturity securities, fair value: [Abstract]
Contractual maturities, Total amount, held-to-maturity, fair value	$ 75	$ 665
Due within 1 year, Contractual maturities, held-to-maturity, fair value	0	0
Due in 1-5 years, Contractual maturities, held-to-maturity, fair value	0	0
Due in 5-10 years, Contractual maturities, held-to-maturity, fair value	75	665
Due in 10 years or more, Contractual maturities, held-to-maturity, fair value	0	0
Other [Member]
Available-for-sale securities:
Contractual maturities, Total amount, available-for-sale	$ 5,303	$ 5,648
Weighted average yield contractual maturities, Total, available-for-sale	3.09%	2.46%
Due within 1 year, Contractual maturities, available-for-sale	$ 19	$ 71
Percentage of weighted average yield, Due within 1 year, available-for-sale	4.82%	3.56%
Due in 1-5 years, Contractual maturities, available-for-sale	$ 834	$ 463
Percentage of weighted average yield, Due in 1-5 years, available-for-sale	3.56%	2.72%
Due in 5-10 years, Contractual maturities, available-for-sale	$ 1,083	$ 1,466
Percentage of weighted average yield, Due In 5-10 years, available-for-sale	2.32%	2.13%
Due in 10 years or more, Contractual maturities, available-for-sale	$ 3,367	$ 3,648
Percentage of weighted average yield, Due after 10 years, available-for-sale	3.21%	2.53%
Held-to-maturity securities:
Held-to-maturity securities, Amortized Cost	$ 0	$ 114
Weighted average yield contractual maturities, Total, held-to-maturity, cost	0.00%	1.83%
Due within 1 year, Contractual maturities, held-to-maturity, cost	$ 0	$ 0
Percentage of weighted average yield, Due In 1 year, held-to-maturity, cost	0.00%	0.00%
Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Amortized Cost	$ 0	$ 114
Percentage of weighted average yield, Due In 1-5 years, held-to-maturity, cost	0.00%	1.83%
Due in 5-10 years, Contractual maturities, held-to-maturity, cost	$ 0	$ 0
Percentage of weighted average yield, Due In 5-10 years, held-to-maturity, cost	0.00%	0.00%
Due in 10 years or more, Contractual maturities, held-to-maturity, cost	$ 0	$ 0
Percentage of weighted average yield, Due after 10 years, held-to-maturity, cost	0.00%	0.00%
Held-to-maturity securities, fair value: [Abstract]
Contractual maturities, Total amount, held-to-maturity, fair value	$ 0	$ 114
Due within 1 year, Contractual maturities, held-to-maturity, fair value	0	0
Due in 1-5 years, Contractual maturities, held-to-maturity, fair value	0	114
Due in 5-10 years, Contractual maturities, held-to-maturity, fair value	0	0
Due in 10 years or more, Contractual maturities, held-to-maturity, fair value	$ 0	$ 0
[1]	(2)Financial information for the prior period has been revised to reflect the impact of the adoption in first quarter 2018 of ASU 2016-01 – Financial Instruments – Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities. See Note 1 (Summary of Significant Accounting Policies) for more information.

AFS and HTM Debt Securities, Re

AFS and HTM Debt Securities, Realized Gains and Losses (Details) - Debt securities [Member] - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Available-For-Sale Debt Securities, Realized Gain (Loss) [Abstract]
Gross realized gains	$ 65	$ 191	$ 139	$ 531
Gross realized losses	(3)	(18)	(17)	(102)
OTTI write-downs	(5)	(7)	(23)	(107)
Net realized gains from available-for-sale debt securities	$ 57	$ 166	$ 99	$ 322

AFS and HTM Debt Securities, OT

AFS and HTM Debt Securities, OTTI Included in Earnings (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Schedule Of Available-For-Sale Debt Securities [Line Items]
Other-than-temporary Impairment Loss, Debt Securities, Held-to-maturity, before Tax			$ 0	$ 0
Securities of U.S. states and political subdivisions [Member]
OTTI write-downs included in earnings (Abstract)
Total debt securities (1)	$ 0	$ 1	2	9
Debt securities [Member]
OTTI write-downs included in earnings (Abstract)
Total debt securities (1)	5	7	23	107
Residential [Member]
OTTI write-downs included in earnings (Abstract)
Total debt securities (1)	0	1	2	7
Commercial [Member]
OTTI write-downs included in earnings (Abstract)
Total debt securities (1)	1	4	15	70
Corporate debt securities [Member]
OTTI write-downs included in earnings (Abstract)
Total debt securities (1)	0	1	0	21
Other [Member]
OTTI write-downs included in earnings (Abstract)
Total debt securities (1)	$ 4	$ 0	$ 4	$ 0

AFS and HTM Debt Securities, _2

AFS and HTM Debt Securities, OTTI Debt Securities (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Debt securities [Member]
OTTI on debt securities (Abstract)
Total recorded as part of gross realized losses	$ 5	$ 7	$ 23	$ 107
Total changes to OCI for non-credit-related OTTI	(5)	(2)	(9)	(53)
Total OTTI losses (reversal of losses) recorded on debt securities	0	5	14	54
Securities of U.S. states and political subdivisions [Member]
OTTI on debt securities (Abstract)
Total recorded as part of gross realized losses	0	1	2	9
Total changes to OCI for non-credit-related OTTI	0	0	(2)	(5)
Residential [Member]
OTTI on debt securities (Abstract)
Total recorded as part of gross realized losses	0	1	2	7
Total changes to OCI for non-credit-related OTTI	0	(1)	(1)	(1)
Commercial Mortgage Backed Securities [Member]
OTTI on debt securities (Abstract)
Total recorded as part of gross realized losses	1	4	15	70
Total changes to OCI for non-credit-related OTTI	(5)	0	(6)	(47)
Corporate debt securities [Member]
OTTI on debt securities (Abstract)
Total recorded as part of gross realized losses	0	1	0	21
Total changes to OCI for non-credit-related OTTI	0	0	0	1
Other [Member]
OTTI on debt securities (Abstract)
Total recorded as part of gross realized losses	4	0	4	0
Total changes to OCI for non-credit-related OTTI	0	(1)	0	(1)
Credit-related OTTI [Member] | Debt securities [Member]
OTTI on debt securities (Abstract)
Total recorded as part of gross realized losses	5	6	22	105
Intent-to-sell OTTI [Member] | Debt securities [Member]
OTTI on debt securities (Abstract)
Total recorded as part of gross realized losses	$ 0	$ 1	$ 1	$ 2

AFS and HTM Debt Securities, Cr

AFS and HTM Debt Securities, Credit Loss Component (Details) - Debt securities [Member] - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward]
Credit loss recognized, beginning of period	$ 626	$ 1,120	$ 742	$ 1,043
Additions:
For securities with initial credit impairments	0	0	0	8
For securities with previous credit impairments	5	6	22	97
Total additions	5	6	22	105
Reductions:
For securities sold, matured, or intended/required to be sold	(68)	(96)	(199)	(114)
For recoveries of previous credit impairments	0	(1)	(2)	(5)
Total reductions	(68)	(97)	(201)	(119)
Credit loss recognized, end of period	$ 563	$ 1,029	$ 563	$ 1,029

Loans and Allowance for Credi_3

Loans and Allowance for Credit Losses, Loans Outstanding (Details) - USD ($) $ in Millions		Sep. 30, 2018	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Temporary Advance Arrangements		$ 92,000	$ 85,000
Loans and Leases Receivable, Deferred Income		2,000	3,900
Loans	[1]	942,300	956,770
Total Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		501,886	503,388
Commercial and Industrial Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		338,048	333,125
Commercial real estate mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		120,403	126,599
Commercial Real Estate Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		23,690	24,279
Commercial Lease Financing Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		19,745	19,385
Total Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		440,414	453,382
Real estate 1-4 family first mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		284,273	284,054
Real estate 1-4 family junior lien mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		35,330	39,713
Credit Card [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		37,812	37,976
Automobile [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		46,075	53,371
Other revolving credit and installment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		36,924	38,268
Geographic Distribution, Foreign [Member] | Total Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		70,500	69,920
Geographic Distribution, Foreign [Member] | Commercial and Industrial Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		61,696	60,106
Geographic Distribution, Foreign [Member] | Commercial real estate mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		6,891	8,033
Geographic Distribution, Foreign [Member] | Commercial Real Estate Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		726	655
Geographic Distribution, Foreign [Member] | Commercial Lease Financing Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		1,187	1,126
International [Member] | Total Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Letters of Credit Outstanding, Amount		$ 1,100	$ 982
[1]	(3)Parenthetical amounts represent assets and liabilities for which we are required to carry at fair value or have elected the fair value option.

Loans and Allowance for Credi_4

Loans and Allowance for Credit Losses, Significant Activity (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Loans and Allowance for Credit Losses, Significant Activity [Abstract]
Purchases	$ 229	$ 449	$ 890	$ 2,420
Sales	(551)	(455)	(1,393)	(1,940)
Transfers to MHFS/LHFS	(392)	374	(2,537)	(285)
Commercial Portfolio Segment [Member]
Loans and Allowance for Credit Losses, Significant Activity [Abstract]
Purchases	225	449	879	2,418
Sales	(438)	(310)	(1,192)	(1,649)
Transfers to MHFS/LHFS	(21)	374	(541)	(284)
Consumer Portfolio Segment [Member]
Loans and Allowance for Credit Losses, Significant Activity [Abstract]
Purchases	4	0	11	2
Sales	(113)	(145)	(201)	(291)
Transfers to MHFS/LHFS	$ (371)	$ 0	$ (1,996)	$ (1)

Loans and Allowance for Credi_5

Loans and Allowance for Credit Losses, Commitments to Lend (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Temporary Advance Arrangements	$ 92,000	$ 85,000
Total unfunded credit commitments	558,764	555,511
Commercial and Industrial Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total unfunded credit commitments	330,296	326,626
Commercial real estate mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total unfunded credit commitments	7,042	7,485
Commercial Real Estate Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total unfunded credit commitments	15,198	16,621
Total Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total unfunded credit commitments	352,536	350,732
Total Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total unfunded credit commitments	206,228	204,779
Real estate 1-4 family first mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total unfunded credit commitments	30,566	29,876
Real estate 1-4 family junior lien mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total unfunded credit commitments	37,959	38,897
Credit Card [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total unfunded credit commitments	109,871	108,465
Other revolving credit and installment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total unfunded credit commitments	27,832	27,541
International [Member] | Total Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial Letters of Credit International	$ 1,100	$ 982

Loans and Allowance for Credi_6

Loans and Allowance for Credit Losses, Allowance for Credit Losses (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Dec. 31, 2017	Sep. 30, 2017
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for credit losses, beginning balance	$ 11,110	$ 12,146	$ 11,960	$ 12,540
Provision for credit losses	580	717	1,223	1,877
Interest income on certain impaired loans	(42)	(43)	(128)	(137)
Loan charge-offs	(1,076)	(1,144)	(3,291)	(3,457)
Loan recoveries	396	427	1,268	1,280
Net loan charge-offs	(680)	(717)	(2,023)	(2,177)
Other	(12)	6	(76)	6
Allowance for credit losses, ending balance	10,956	12,109	10,956	12,109
Components:
Allowance for loan losses					$ 10,021	$ 11,004	$ 11,078
Allowance for unfunded credit commitments					935		1,031
Total allowance for credit losses	$ 11,110	$ 12,146	$ 11,960	$ 12,540	$ 10,956	11,960	$ 12,109
Net loan charge-offs (annualized) as a percentage of average total loans	0.29%	0.30%	0.29%	0.30%
Allowance for loan losses as a percentage of total loans					1.06%		1.16%
Allowance for credit losses as a percentage of total loans					1.16%		1.27%
Total Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for credit losses, beginning balance	$ 6,711	$ 6,961	$ 6,632	$ 7,394
Provision for credit losses	22	(9)	280	(195)
Interest income on certain impaired loans	(12)	(13)	(37)	(42)
Loan charge-offs	(233)	(226)	(589)	(673)
Loan recoveries	81	113	292	342
Net loan charge-offs	(152)	(113)	(297)	(331)
Other	(1)	6	(10)	6
Allowance for credit losses, ending balance	6,568	6,832	6,568	6,832
Components:
Total allowance for credit losses	6,711	6,961	6,632	7,394	$ 6,568	6,632	$ 6,832
Commercial and Industrial Loans [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Loan charge-offs	(209)	(194)	(507)	(608)
Loan recoveries	61	69	216	234
Commercial real estate mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Loan charge-offs	(9)	(21)	(30)	(34)
Loan recoveries	10	24	46	68
Commercial Real Estate Construction [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Loan charge-offs	0	0	0	0
Loan recoveries	2	15	12	27
Commercial Lease Financing Receivable [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Loan charge-offs	(15)	(11)	(52)	(31)
Loan recoveries	8	5	18	13
Total Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for credit losses, beginning balance	4,399	5,185	5,328	5,146
Provision for credit losses	558	726	943	2,072
Interest income on certain impaired loans	(30)	(30)	(91)	(95)
Loan charge-offs	(843)	(918)	(2,702)	(2,784)
Loan recoveries	315	314	976	938
Net loan charge-offs	(528)	(604)	(1,726)	(1,846)
Other	(11)	0	(66)	0
Allowance for credit losses, ending balance	4,388	5,277	4,388	5,277
Components:
Total allowance for credit losses	4,399	5,185	5,328	5,146	$ 4,388	$ 5,328	$ 5,277
Real estate 1-4 family first mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Loan charge-offs	(45)	(67)	(141)	(191)
Loan recoveries	70	83	207	216
Real estate 1-4 family junior lien mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Loan charge-offs	(47)	(70)	(141)	(225)
Loan recoveries	56	69	171	205
Credit Card [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Loan charge-offs	(376)	(337)	(1,185)	(1,083)
Loan recoveries	77	60	231	177
Automobile [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Loan charge-offs	(214)	(274)	(730)	(741)
Loan recoveries	84	72	279	246
Other revolving credit and installment [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Loan charge-offs	(161)	(170)	(505)	(544)
Loan recoveries	$ 28	$ 30	$ 88	$ 94

Loans and Allowance for Credi_7

Loans and Allowance for Credit Losses, Allowance Activity by Portfolio Segment (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for credit losses, beginning balance	$ 11,110	$ 12,146	$ 11,960	$ 12,540
Provision for credit losses	580	717	1,223	1,877
Interest income on certain impaired loans	(42)	(43)	(128)	(137)
Loan charge-offs	(1,076)	(1,144)	(3,291)	(3,457)
Loan recoveries	396	427	1,268	1,280
Net loan charge-offs	(680)	(717)	(2,023)	(2,177)
Other	(12)	6	(76)	6
Allowance for credit losses, ending balance	10,956	12,109	10,956	12,109
Commercial Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for credit losses, beginning balance	6,711	6,961	6,632	7,394
Provision for credit losses	22	(9)	280	(195)
Interest income on certain impaired loans	(12)	(13)	(37)	(42)
Loan charge-offs	(233)	(226)	(589)	(673)
Loan recoveries	81	113	292	342
Net loan charge-offs	(152)	(113)	(297)	(331)
Other	(1)	6	(10)	6
Allowance for credit losses, ending balance	6,568	6,832	6,568	6,832
Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for credit losses, beginning balance	4,399	5,185	5,328	5,146
Provision for credit losses	558	726	943	2,072
Interest income on certain impaired loans	(30)	(30)	(91)	(95)
Loan charge-offs	(843)	(918)	(2,702)	(2,784)
Loan recoveries	315	314	976	938
Net loan charge-offs	(528)	(604)	(1,726)	(1,846)
Other	(11)	0	(66)	0
Allowance for credit losses, ending balance	$ 4,388	$ 5,277	$ 4,388	$ 5,277

Loans and Allowance for Credi_8

Loans and Allowance for Credit Losses, Allowance by Credit Impairment Methodology (Details) - USD ($) $ in Millions		Sep. 30, 2018	Jun. 30, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2016
Loans and Allowance for Credit Losses, by Credit Impairment Method [Abstract]
Allowance for Credit Losses, Collectively evaluated		$ 9,469		$ 10,070
Allowance for Credit Losses, Individually evaluated		1,480		1,890
Total allowance for credit losses		10,956	$ 11,110	11,960	$ 12,109	$ 12,146	$ 12,540
Financing Receivable, Collectively evaluated		918,367		925,261
Financing Receivable, Individually evaluated		16,992		18,674
Loans	[1]	942,300		956,770
Commercial Portfolio Segment [Member]
Loans and Allowance for Credit Losses, by Credit Impairment Method [Abstract]
Allowance for Credit Losses, Collectively evaluated		6,062		5,927
Allowance for Credit Losses, Individually evaluated		499		705
Total allowance for credit losses		6,568	6,711	6,632	6,832	6,961	7,394
Financing Receivable, Collectively evaluated		498,353		499,342
Financing Receivable, Individually evaluated		3,488		3,960
Loans		501,886		503,388
Consumer Portfolio Segment [Member]
Loans and Allowance for Credit Losses, by Credit Impairment Method [Abstract]
Allowance for Credit Losses, Collectively evaluated		3,407		4,143
Allowance for Credit Losses, Individually evaluated		981		1,185
Total allowance for credit losses		4,388	$ 4,399	5,328	$ 5,277	$ 5,185	$ 5,146
Financing Receivable, Collectively evaluated		420,014		425,919
Financing Receivable, Individually evaluated		13,504		14,714
Loans		440,414		453,382
PCI Loans Carrying Value [Member]
Loans and Allowance for Credit Losses, by Credit Impairment Method [Abstract]
Financing Receivable, Recorded Investment, Current		6,941		12,835
PCI Loans Carrying Value [Member] | Commercial Portfolio Segment [Member]
Loans and Allowance for Credit Losses, by Credit Impairment Method [Abstract]
Financing Receivable, Recorded Investment, Current		45		86
PCI Loans Carrying Value [Member] | Consumer Portfolio Segment [Member]
Loans and Allowance for Credit Losses, by Credit Impairment Method [Abstract]
Financing Receivable, Recorded Investment, Current		6,896		12,749
SEC Schedule, 12-09, Allowance, Credit Loss [Member]
Loans and Allowance for Credit Losses, by Credit Impairment Method [Abstract]
Total allowance for credit losses		7		0
SEC Schedule, 12-09, Allowance, Credit Loss [Member] | Commercial Portfolio Segment [Member]
Loans and Allowance for Credit Losses, by Credit Impairment Method [Abstract]
Total allowance for credit losses		7		0
SEC Schedule, 12-09, Allowance, Credit Loss [Member] | Consumer Portfolio Segment [Member]
Loans and Allowance for Credit Losses, by Credit Impairment Method [Abstract]
Total allowance for credit losses		$ 0		$ 0
[1]	(3)Parenthetical amounts represent assets and liabilities for which we are required to carry at fair value or have elected the fair value option.

Loans and Allowance for Credi_9

Loans and Allowance for Credit Losses, Loans by Credit Quality Indicator, Commercial (Details) - USD ($) $ in Millions		Sep. 30, 2018	Dec. 31, 2017	Dec. 31, 2008
Loans and Leases Receivable Disclosure [Abstract]
Loans	[1]	$ 942,300	$ 956,770
Total Commercial [Member]
Loans and Leases Receivable Disclosure [Abstract]
Loans		501,886	503,388
Commercial and Industrial Loans [Member]
Loans and Leases Receivable Disclosure [Abstract]
Loans		338,048	333,125
Commercial real estate mortgage [Member]
Loans and Leases Receivable Disclosure [Abstract]
Loans		120,403	126,599
Commercial Real Estate Construction [Member]
Loans and Leases Receivable Disclosure [Abstract]
Loans		23,690	24,279
Commercial Lease Financing Receivable [Member]
Loans and Leases Receivable Disclosure [Abstract]
Loans		19,745	19,385
Loans Excluding Purchased Credit-Impaired Loans [Member]
Loans and Leases Receivable Disclosure [Abstract]
Financing Receivable, Recorded Investment, Nonaccrual Status		7,053	8,036
Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial Real Estate Mortgage and Construction Loans [Member] | Criticized [Member]
Loans and Leases Receivable Disclosure [Abstract]
Loans		4,704
Financing Receivable, Recorded Investment, Nonaccrual Status		647
Loans Excluding Purchased Credit-Impaired Loans [Member] | Total Commercial [Member]
Loans and Leases Receivable Disclosure [Abstract]
Loans		501,841	503,302
Financing Receivable, Recorded Investment, Nonaccrual Status		2,298	2,640
Loans Excluding Purchased Credit-Impaired Loans [Member] | Total Commercial [Member] | Pass [Member]
Loans and Leases Receivable Disclosure [Abstract]
Loans		480,404	480,886
Loans Excluding Purchased Credit-Impaired Loans [Member] | Total Commercial [Member] | Criticized [Member]
Loans and Leases Receivable Disclosure [Abstract]
Loans		21,437	22,416
Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial and Industrial Loans [Member]
Loans and Leases Receivable Disclosure [Abstract]
Loans		338,003	333,039
Financing Receivable, Recorded Investment, Nonaccrual Status		1,555	1,899
Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial and Industrial Loans [Member] | Pass [Member]
Loans and Leases Receivable Disclosure [Abstract]
Loans		322,264	316,431
Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial and Industrial Loans [Member] | Criticized [Member]
Loans and Leases Receivable Disclosure [Abstract]
Loans		15,739	16,608
Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial real estate mortgage [Member]
Loans and Leases Receivable Disclosure [Abstract]
Loans		120,403	126,599
Financing Receivable, Recorded Investment, Nonaccrual Status		603	628
Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial real estate mortgage [Member] | Pass [Member]
Loans and Leases Receivable Disclosure [Abstract]
Loans		115,970	122,312
Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial real estate mortgage [Member] | Criticized [Member]
Loans and Leases Receivable Disclosure [Abstract]
Loans		4,433	4,287
Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial Real Estate Construction [Member]
Loans and Leases Receivable Disclosure [Abstract]
Loans		23,690	24,279
Financing Receivable, Recorded Investment, Nonaccrual Status		44	37
Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial Real Estate Construction [Member] | Pass [Member]
Loans and Leases Receivable Disclosure [Abstract]
Loans		23,419	23,981
Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial Real Estate Construction [Member] | Criticized [Member]
Loans and Leases Receivable Disclosure [Abstract]
Loans		271	298
Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial Lease Financing Receivable [Member]
Loans and Leases Receivable Disclosure [Abstract]
Loans		19,745	19,385
Financing Receivable, Recorded Investment, Nonaccrual Status		96	76
Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial Lease Financing Receivable [Member] | Pass [Member]
Loans and Leases Receivable Disclosure [Abstract]
Loans		18,751	18,162
Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial Lease Financing Receivable [Member] | Criticized [Member]
Loans and Leases Receivable Disclosure [Abstract]
Loans		994	1,223
PCI Loans Carrying Value [Member]
Loans and Leases Receivable Disclosure [Abstract]
PCI loans		6,941	12,835
PCI Loans Carrying Value [Member] | Total Commercial [Member]
Loans and Leases Receivable Disclosure [Abstract]
PCI loans		45	86	$ 18,700
PCI Loans Carrying Value [Member] | Commercial and Industrial Loans [Member]
Loans and Leases Receivable Disclosure [Abstract]
PCI loans		45	86
PCI Loans Carrying Value [Member] | Commercial real estate mortgage [Member]
Loans and Leases Receivable Disclosure [Abstract]
PCI loans		0	0
PCI Loans Carrying Value [Member] | Commercial Real Estate Construction [Member]
Loans and Leases Receivable Disclosure [Abstract]
PCI loans		0	0
PCI Loans Carrying Value [Member] | Commercial Lease Financing Receivable [Member]
Loans and Leases Receivable Disclosure [Abstract]
PCI loans		$ 0	$ 0
[1]	(3)Parenthetical amounts represent assets and liabilities for which we are required to carry at fair value or have elected the fair value option.

Loans and Allowance for Cred_10

Loans and Allowance for Credit Losses, Loans by Delinquency Status, Commercial (Details) - USD ($) $ in Millions		Sep. 30, 2018	Dec. 31, 2017	Dec. 31, 2008
By delinquency status:
Loans	[1]	$ 942,300	$ 956,770
Total Commercial [Member]
By delinquency status:
Loans		501,886	503,388
Commercial and Industrial Loans [Member]
By delinquency status:
Loans		338,048	333,125
Commercial real estate mortgage [Member]
By delinquency status:
Loans		120,403	126,599
Commercial Real Estate Construction [Member]
By delinquency status:
Loans		23,690	24,279
Commercial Lease Financing Receivable [Member]
By delinquency status:
Loans		19,745	19,385
Loans Excluding Purchased Credit-Impaired Loans [Member]
By delinquency status:
Over 90 DPD and still accruing		9,209	11,997
Nonaccrual loans		7,053	8,036
Loans Excluding Purchased Credit-Impaired Loans [Member] | Total Commercial [Member]
By delinquency status:
Loans		501,841	503,302
Nonaccrual loans		2,298	2,640
Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial and Industrial Loans [Member]
By delinquency status:
Loans		338,003	333,039
Nonaccrual loans		1,555	1,899
Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial real estate mortgage [Member]
By delinquency status:
Loans		120,403	126,599
Nonaccrual loans		603	628
Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial Real Estate Construction [Member]
By delinquency status:
Loans		23,690	24,279
Nonaccrual loans		44	37
Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial Lease Financing Receivable [Member]
By delinquency status:
Loans		19,745	19,385
Nonaccrual loans		96	76
PCI Loans Carrying Value [Member]
By delinquency status:
PCI loans		6,941	12,835
PCI Loans Carrying Value [Member] | Total Commercial [Member]
By delinquency status:
PCI loans		45	86	$ 18,700
PCI Loans Carrying Value [Member] | Commercial and Industrial Loans [Member]
By delinquency status:
PCI loans		45	86
PCI Loans Carrying Value [Member] | Commercial real estate mortgage [Member]
By delinquency status:
PCI loans		0	0
PCI Loans Carrying Value [Member] | Commercial Real Estate Construction [Member]
By delinquency status:
PCI loans		0	0
PCI Loans Carrying Value [Member] | Commercial Lease Financing Receivable [Member]
By delinquency status:
PCI loans		0	0
Pass [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Total Commercial [Member]
By delinquency status:
Loans		480,404	480,886
Pass [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial and Industrial Loans [Member]
By delinquency status:
Loans		322,264	316,431
Pass [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial real estate mortgage [Member]
By delinquency status:
Loans		115,970	122,312
Pass [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial Real Estate Construction [Member]
By delinquency status:
Loans		23,419	23,981
Pass [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial Lease Financing Receivable [Member]
By delinquency status:
Loans		18,751	18,162
Criticized [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Total Commercial [Member]
By delinquency status:
Loans		21,437	22,416
Criticized [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial and Industrial Loans [Member]
By delinquency status:
Loans		15,739	16,608
Criticized [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial real estate mortgage [Member]
By delinquency status:
Loans		4,433	4,287
Criticized [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial Real Estate Construction [Member]
By delinquency status:
Loans		271	298
Criticized [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial Lease Financing Receivable [Member]
By delinquency status:
Loans		994	1,223
Current-29 days past due (DPD) and still accruing [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Total Commercial [Member]
By delinquency status:
Loans		498,449	499,216
Current-29 days past due (DPD) and still accruing [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial and Industrial Loans [Member]
By delinquency status:
Loans		336,004	330,319
Current-29 days past due (DPD) and still accruing [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial real estate mortgage [Member]
By delinquency status:
Loans		119,445	125,642
Current-29 days past due (DPD) and still accruing [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial Real Estate Construction [Member]
By delinquency status:
Loans		23,506	24,107
Current-29 days past due (DPD) and still accruing [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial Lease Financing Receivable [Member]
By delinquency status:
Loans		19,494	19,148
30-89 days past due and still accruing [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Total Commercial [Member]
By delinquency status:
Loans		996	1,397
30-89 days past due and still accruing [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial and Industrial Loans [Member]
By delinquency status:
Loans		402	795
30-89 days past due and still accruing [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial real estate mortgage [Member]
By delinquency status:
Loans		299	306
30-89 days past due and still accruing [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial Real Estate Construction [Member]
By delinquency status:
Loans		140	135
30-89 days past due and still accruing [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial Lease Financing Receivable [Member]
By delinquency status:
Loans		155	161
Loans Excluding Government Insured or Guaranteed Loans [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member]
By delinquency status:
Over 90 DPD and still accruing		933	1,063
Loans Excluding Government Insured or Guaranteed Loans [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Total Commercial [Member]
By delinquency status:
Over 90 DPD and still accruing		98	49
Loans Excluding Government Insured or Guaranteed Loans [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial and Industrial Loans [Member]
By delinquency status:
Over 90 DPD and still accruing		42	26
Loans Excluding Government Insured or Guaranteed Loans [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial real estate mortgage [Member]
By delinquency status:
Over 90 DPD and still accruing		56	23
Loans Excluding Government Insured or Guaranteed Loans [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial Real Estate Construction [Member]
By delinquency status:
Over 90 DPD and still accruing		0	0
Loans Excluding Government Insured or Guaranteed Loans [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial Lease Financing Receivable [Member]
By delinquency status:
Over 90 DPD and still accruing		$ 0	$ 0
[1]	(3)Parenthetical amounts represent assets and liabilities for which we are required to carry at fair value or have elected the fair value option.

Loans and Allowance for Cred_11

Loans and Allowance for Credit Losses, Loans by Delinquency Status, Consumer (Details) - USD ($) $ in Millions		Sep. 30, 2018	Dec. 31, 2017	Dec. 31, 2008
By delinquency status:
Loans	[1]	$ 942,300	$ 956,770
Total Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
90 days or more past due and still accruing		835	1,000
By delinquency status:
Loans		$ 440,414	$ 453,382
Real estate 1-4 family first mortgage [Member]
By delinquency status:
Financing Receivables Equal To Or Greater Than 180 Days Past Due Percentage Of Portfolio		0.30%	0.40%
Loans		$ 284,273	$ 284,054
Real estate 1-4 family junior lien mortgage [Member]
By delinquency status:
Loans		35,330	39,713
Credit Card [Member]
By delinquency status:
Loans		37,812	37,976
Automobile [Member]
By delinquency status:
Loans		46,075	53,371
Other revolving credit and installment [Member]
By delinquency status:
Loans		36,924	38,268
Loans Excluding Purchased Credit-Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
90 days or more past due and still accruing		9,209	11,997
Loans Excluding Purchased Credit-Impaired Loans [Member] | Consumer Real Estate Loans Government Guaranteed Or Insured [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
90 days or more past due and still accruing		8,276	10,934
Loans Excluding Purchased Credit-Impaired Loans [Member] | Total Consumer [Member]
By delinquency status:
Loans		433,518	440,633
Loans Excluding Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family first mortgage [Member]
By delinquency status:
Loans		277,395	271,332
Loans Excluding Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family junior lien mortgage [Member]
By delinquency status:
Loans		35,312	39,686
Loans Excluding Purchased Credit-Impaired Loans [Member] | Credit Card [Member]
By delinquency status:
Loans		37,812	37,976
Loans Excluding Purchased Credit-Impaired Loans [Member] | Automobile [Member]
By delinquency status:
Loans		46,075	53,371
Loans Excluding Purchased Credit-Impaired Loans [Member] | Other revolving credit and installment [Member]
By delinquency status:
Loans		36,924	38,268
PCI Loans Carrying Value [Member]
By delinquency status:
PCI loans		6,941	12,835
PCI Loans Carrying Value [Member] | Total Consumer [Member]
By delinquency status:
PCI loans		6,896	12,749	$ 40,100
PCI Loans Carrying Value [Member] | Real estate 1-4 family first mortgage [Member]
By delinquency status:
PCI loans		6,878	12,722
PCI Loans Carrying Value [Member] | Real estate 1-4 family junior lien mortgage [Member]
By delinquency status:
PCI loans		18	27
PCI Loans Carrying Value [Member] | Credit Card [Member]
By delinquency status:
PCI loans		0	0
PCI Loans Carrying Value [Member] | Automobile [Member]
By delinquency status:
PCI loans		0	0
PCI Loans Carrying Value [Member] | Other revolving credit and installment [Member]
By delinquency status:
PCI loans		0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Consumer Real Estate Loans Government Guaranteed Or Insured [Member]
By delinquency status:
Loans		7,900	10,500
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Total Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
90 days or more past due and still accruing		2,400	3,000
Current-29 days past due (DPD) [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Total Consumer [Member]
By delinquency status:
Loans		413,791	416,858
Current-29 days past due (DPD) [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family first mortgage [Member]
By delinquency status:
Loans		261,118	251,786
Current-29 days past due (DPD) [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family junior lien mortgage [Member]
By delinquency status:
Loans		34,551	38,746
Current-29 days past due (DPD) [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Credit Card [Member]
By delinquency status:
Loans		36,871	36,996
Current-29 days past due (DPD) [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Automobile [Member]
By delinquency status:
Loans		44,661	51,445
Current-29 days past due (DPD) [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Other revolving credit and installment [Member]
By delinquency status:
Loans		36,590	37,885
30-59 DPD [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Total Consumer [Member]
By delinquency status:
Loans		3,159	4,056
30-59 DPD [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family first mortgage [Member]
By delinquency status:
Loans		1,498	1,893
30-59 DPD [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family junior lien mortgage [Member]
By delinquency status:
Loans		253	336
30-59 DPD [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Credit Card [Member]
By delinquency status:
Loans		284	287
30-59 DPD [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Automobile [Member]
By delinquency status:
Loans		1,005	1,385
30-59 DPD [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Other revolving credit and installment [Member]
By delinquency status:
Loans		119	155
60 to 89 Days Past Due [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Total Consumer [Member]
By delinquency status:
Loans		1,248	1,591
60 to 89 Days Past Due [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family first mortgage [Member]
By delinquency status:
Loans		531	742
60 to 89 Days Past Due [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family junior lien mortgage [Member]
By delinquency status:
Loans		126	163
60 to 89 Days Past Due [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Credit Card [Member]
By delinquency status:
Loans		197	201
60 to 89 Days Past Due [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Automobile [Member]
By delinquency status:
Loans		300	392
60 to 89 Days Past Due [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Other revolving credit and installment [Member]
By delinquency status:
Loans		94	93
90-119 Days Past Due [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Total Consumer [Member]
By delinquency status:
Loans		660	890
90-119 Days Past Due [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family first mortgage [Member]
By delinquency status:
Loans		232	369
90-119 Days Past Due [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family junior lien mortgage [Member]
By delinquency status:
Loans		73	103
90-119 Days Past Due [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Credit Card [Member]
By delinquency status:
Loans		173	192
90-119 Days Past Due [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Automobile [Member]
By delinquency status:
Loans		108	146
90-119 Days Past Due [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Other revolving credit and installment [Member]
By delinquency status:
Loans		74	80
120-179 DPD member [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Total Consumer [Member]
By delinquency status:
Loans		632	734
120-179 DPD member [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family first mortgage [Member]
By delinquency status:
Loans		239	308
120-179 DPD member [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family junior lien mortgage [Member]
By delinquency status:
Loans		82	95
120-179 DPD member [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Credit Card [Member]
By delinquency status:
Loans		286	298
120-179 DPD member [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Automobile [Member]
By delinquency status:
Loans		1	3
120-179 DPD member [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Other revolving credit and installment [Member]
By delinquency status:
Loans		24	30
180 plus DPD [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Total Consumer [Member]
By delinquency status:
Loans		1,142	1,361
180 plus DPD [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family first mortgage [Member]
By delinquency status:
Loans		891	1,091
180 plus DPD [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family junior lien mortgage [Member]
By delinquency status:
Loans		227	243
180 plus DPD [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Credit Card [Member]
By delinquency status:
Loans		1	2
180 plus DPD [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Automobile [Member]
By delinquency status:
Loans		0	0
180 plus DPD [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Other revolving credit and installment [Member]
By delinquency status:
Loans		23	25
Government Insured or Guaranteed [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Total Consumer [Member]
By delinquency status:
Loans		12,886	15,143
Government Insured or Guaranteed [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family first mortgage [Member]
By delinquency status:
Loans		12,886	15,143
Government Insured or Guaranteed [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family junior lien mortgage [Member]
By delinquency status:
Loans		0	0
Government Insured or Guaranteed [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Credit Card [Member]
By delinquency status:
Loans		0	0
Government Insured or Guaranteed [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Automobile [Member]
By delinquency status:
Loans		0	0
Government Insured or Guaranteed [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Other revolving credit and installment [Member]
By delinquency status:
Loans		$ 0	$ 0
[1]	(3)Parenthetical amounts represent assets and liabilities for which we are required to carry at fair value or have elected the fair value option.

Loans and Allowance for Cred_12

Loans and Allowance for Credit Losses, Loans by FICO Score, Consumer (Details) - USD ($) $ in Millions		Sep. 30, 2018	Dec. 31, 2017	Dec. 31, 2008
By FICO:
Loans	[1]	$ 942,300	$ 956,770
Total Consumer [Member]
By FICO:
Loans		440,414	453,382
90 days or more past due and still accruing		835	1,000
Real estate 1-4 family first mortgage [Member]
By FICO:
Loans		284,273	284,054
Real estate 1-4 family junior lien mortgage [Member]
By FICO:
Loans		35,330	39,713
Credit Card [Member]
By FICO:
Loans		37,812	37,976
Automobile [Member]
By FICO:
Loans		46,075	53,371
Other revolving credit and installment [Member]
By FICO:
Loans		36,924	38,268
Loans Excluding Purchased Credit-Impaired Loans [Member]
By FICO:
90 days or more past due and still accruing		9,209	11,997
Loans Excluding Purchased Credit-Impaired Loans [Member] | Total Consumer [Member]
By FICO:
Loans		433,518	440,633
Loans Excluding Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family first mortgage [Member]
By FICO:
Loans		277,395	271,332
Loans Excluding Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family junior lien mortgage [Member]
By FICO:
Loans		35,312	39,686
Loans Excluding Purchased Credit-Impaired Loans [Member] | Credit Card [Member]
By FICO:
Loans		37,812	37,976
Loans Excluding Purchased Credit-Impaired Loans [Member] | Automobile [Member]
By FICO:
Loans		46,075	53,371
Loans Excluding Purchased Credit-Impaired Loans [Member] | Other revolving credit and installment [Member]
By FICO:
Loans		36,924	38,268
PCI Loans Carrying Value [Member]
By FICO:
PCI loans		6,941	12,835
PCI Loans Carrying Value [Member] | Total Consumer [Member]
By FICO:
PCI loans		6,896	12,749	$ 40,100
PCI Loans Carrying Value [Member] | Real estate 1-4 family first mortgage [Member]
By FICO:
PCI loans		6,878	12,722
PCI Loans Carrying Value [Member] | Real estate 1-4 family junior lien mortgage [Member]
By FICO:
PCI loans		18	27
PCI Loans Carrying Value [Member] | Credit Card [Member]
By FICO:
PCI loans		0	0
PCI Loans Carrying Value [Member] | Automobile [Member]
By FICO:
PCI loans		0	0
PCI Loans Carrying Value [Member] | Other revolving credit and installment [Member]
By FICO:
PCI loans		0	0
FICO less than 600 [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Total Consumer [Member]
By FICO:
Loans		17,314	20,159
FICO less than 600 [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family first mortgage [Member]
By FICO:
Loans		4,363	5,145
FICO less than 600 [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family junior lien mortgage [Member]
By FICO:
Loans		1,485	1,768
FICO less than 600 [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Credit Card [Member]
By FICO:
Loans		3,476	3,525
FICO less than 600 [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Automobile [Member]
By FICO:
Loans		7,237	8,858
FICO less than 600 [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Other revolving credit and installment [Member]
By FICO:
Loans		753	863
FICO 600-639 [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Total Consumer [Member]
By FICO:
Loans		12,397	14,360
FICO 600-639 [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family first mortgage [Member]
By FICO:
Loans		3,017	3,487
FICO 600-639 [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family junior lien mortgage [Member]
By FICO:
Loans		1,044	1,253
FICO 600-639 [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Credit Card [Member]
By FICO:
Loans		3,005	3,101
FICO 600-639 [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Automobile [Member]
By FICO:
Loans		4,546	5,615
FICO 600-639 [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Other revolving credit and installment [Member]
By FICO:
Loans		785	904
FICO 640-679 [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Total Consumer [Member]
By FICO:
Loans		21,444	24,521
FICO 640-679 [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family first mortgage [Member]
By FICO:
Loans		5,840	6,789
FICO 640-679 [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family junior lien mortgage [Member]
By FICO:
Loans		1,968	2,387
FICO 640-679 [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Credit Card [Member]
By FICO:
Loans		5,504	5,690
FICO 640-679 [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Automobile [Member]
By FICO:
Loans		6,383	7,696
FICO 640-679 [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Other revolving credit and installment [Member]
By FICO:
Loans		1,749	1,959
FICO 680-719 [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Total Consumer [Member]
By FICO:
Loans		36,209	39,809
FICO 680-719 [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family first mortgage [Member]
By FICO:
Loans		13,813	14,977
FICO 680-719 [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family junior lien mortgage [Member]
By FICO:
Loans		4,073	4,797
FICO 680-719 [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Credit Card [Member]
By FICO:
Loans		7,553	7,628
FICO 680-719 [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Automobile [Member]
By FICO:
Loans		7,524	8,825
FICO 680-719 [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Other revolving credit and installment [Member]
By FICO:
Loans		3,246	3,582
FICO 720-759 [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Total Consumer [Member]
By FICO:
Loans		52,759	55,164
FICO 720-759 [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family first mortgage [Member]
By FICO:
Loans		27,330	27,926
FICO 720-759 [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family junior lien mortgage [Member]
By FICO:
Loans		5,487	6,246
FICO 720-759 [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Credit Card [Member]
By FICO:
Loans		8,223	8,097
FICO 720-759 [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Automobile [Member]
By FICO:
Loans		6,991	7,806
FICO 720-759 [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Other revolving credit and installment [Member]
By FICO:
Loans		4,728	5,089
FICO 760-799 [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Total Consumer [Member]
By FICO:
Loans		81,936	82,010
FICO 760-799 [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family first mortgage [Member]
By FICO:
Loans		57,101	55,590
FICO 760-799 [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family junior lien mortgage [Member]
By FICO:
Loans		6,494	7,323
FICO 760-799 [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Credit Card [Member]
By FICO:
Loans		6,470	6,372
FICO 760-799 [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Automobile [Member]
By FICO:
Loans		6,008	6,468
FICO 760-799 [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Other revolving credit and installment [Member]
By FICO:
Loans		5,863	6,257
FICO 800 or more [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Total Consumer [Member]
By FICO:
Loans		179,781	171,167
FICO 800 or more [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family first mortgage [Member]
By FICO:
Loans		147,812	136,729
FICO 800 or more [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family junior lien mortgage [Member]
By FICO:
Loans		13,401	15,144
FICO 800 or more [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Credit Card [Member]
By FICO:
Loans		3,040	2,994
FICO 800 or more [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Automobile [Member]
By FICO:
Loans		7,252	7,845
FICO 800 or more [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Other revolving credit and installment [Member]
By FICO:
Loans		8,276	8,455
No FICO available [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Total Consumer [Member]
By FICO:
Loans		9,836	9,789
No FICO available [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family first mortgage [Member]
By FICO:
Loans		5,233	5,546
No FICO available [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family junior lien mortgage [Member]
By FICO:
Loans		1,360	768
No FICO available [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Credit Card [Member]
By FICO:
Loans		541	569
No FICO available [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Automobile [Member]
By FICO:
Loans		134	258
No FICO available [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Other revolving credit and installment [Member]
By FICO:
Loans		2,568	2,648
FICO not required [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Total Consumer [Member]
By FICO:
Loans		8,956	8,511
FICO not required [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family first mortgage [Member]
By FICO:
Loans		0	0
FICO not required [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family junior lien mortgage [Member]
By FICO:
Loans		0	0
FICO not required [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Credit Card [Member]
By FICO:
Loans		0	0
FICO not required [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Automobile [Member]
By FICO:
Loans		0	0
FICO not required [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Other revolving credit and installment [Member]
By FICO:
Loans		8,956	8,511
Government Insured or Guaranteed [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Total Consumer [Member]
By FICO:
Loans		12,886	15,143
Government Insured or Guaranteed [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family first mortgage [Member]
By FICO:
Loans		12,886	15,143
Government Insured or Guaranteed [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family junior lien mortgage [Member]
By FICO:
Loans		0	0
Government Insured or Guaranteed [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Credit Card [Member]
By FICO:
Loans		0	0
Government Insured or Guaranteed [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Automobile [Member]
By FICO:
Loans		0	0
Government Insured or Guaranteed [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Other revolving credit and installment [Member]
By FICO:
Loans		$ 0	$ 0
[1]	(3)Parenthetical amounts represent assets and liabilities for which we are required to carry at fair value or have elected the fair value option.

Loans and Allowance for Cred_13

Loans and Allowance for Credit Losses, Loans by Loan to Value Ratio, Consumer (Details) - USD ($) $ in Millions		Sep. 30, 2018	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
High Value Properties, Threshold		$ 1
By LTV/CLTV:
Loans	[1]	942,300	$ 956,770
Loans Excluding Purchased Credit-Impaired Loans [Member]
By LTV/CLTV:
Nonaccrual loans		7,053	8,036
Residential Mortgage [Member]
By LTV/CLTV:
Loans		319,603	323,767
Residential Mortgage [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member]
By LTV/CLTV:
Loans		312,707	311,018
Real estate 1-4 family first mortgage [Member]
By LTV/CLTV:
Loans		284,273	284,054
Real estate 1-4 family first mortgage [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member]
By LTV/CLTV:
Loans		277,395	271,332
Nonaccrual loans		3,605	4,122
Real estate 1-4 family junior lien mortgage [Member]
By LTV/CLTV:
Loans		35,330	39,713
Real estate 1-4 family junior lien mortgage [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member]
By LTV/CLTV:
Loans		35,312	39,686
Nonaccrual loans		984	1,086
PCI Loans Carrying Value [Member]
By LTV/CLTV:
PCI loans		6,941	12,835
PCI Loans Carrying Value [Member] | Real estate 1-4 family first mortgage [Member]
By LTV/CLTV:
PCI loans		6,878	12,722
PCI Loans Carrying Value [Member] | Real estate 1-4 family junior lien mortgage [Member]
By LTV/CLTV:
PCI loans		18	27
PCI Loans Carrying Value [Member] | Residential Mortgage [Member]
By LTV/CLTV:
PCI loans		6,896	12,749
LTV 0-60% [Member] | Residential Mortgage [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member]
By LTV/CLTV:
Loans		163,135	150,203
LTV 0-60% [Member] | Real estate 1-4 family first mortgage [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member]
By LTV/CLTV:
Loans		147,186	133,902
LTV 0-60% [Member] | Real estate 1-4 family junior lien mortgage [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member]
By LTV/CLTV:
Loans		15,949	16,301
LTV 60.01-80% [Member] | Residential Mortgage [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member]
By LTV/CLTV:
Loans		113,817	117,557
LTV 60.01-80% [Member] | Real estate 1-4 family first mortgage [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member]
By LTV/CLTV:
Loans		102,473	104,639
LTV 60.01-80% [Member] | Real estate 1-4 family junior lien mortgage [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member]
By LTV/CLTV:
Loans		11,344	12,918
LTV 80.01-100% [Member] | Residential Mortgage [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member]
By LTV/CLTV:
Loans		17,158	20,504
LTV 80.01-100% [Member] | Real estate 1-4 family first mortgage [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member]
By LTV/CLTV:
Loans		11,983	13,924
LTV 80.01-100% [Member] | Real estate 1-4 family junior lien mortgage [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member]
By LTV/CLTV:
Loans		5,175	6,580
LTV 100.01-120% [Member] | Residential Mortgage [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member]
By LTV/CLTV:
Loans		3,127	4,295
LTV 100.01-120% [Member] | Real estate 1-4 family first mortgage [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member]
By LTV/CLTV:
Loans		1,353	1,868
LTV 100.01-120% [Member] | Real estate 1-4 family junior lien mortgage [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member]
By LTV/CLTV:
Loans		1,774	2,427
LTV greater than 120% [Member] | Residential Mortgage [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member]
By LTV/CLTV:
Loans		1,185	1,791
LTV greater than 120% [Member] | Real estate 1-4 family first mortgage [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member]
By LTV/CLTV:
Loans		536	783
LTV greater than 120% [Member] | Real estate 1-4 family junior lien mortgage [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member]
By LTV/CLTV:
Loans		649	1,008
No LTV/CLTV available [Member] | Residential Mortgage [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member]
By LTV/CLTV:
Loans		1,399	1,525
No LTV/CLTV available [Member] | Real estate 1-4 family first mortgage [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member]
By LTV/CLTV:
Loans		978	1,073
No LTV/CLTV available [Member] | Real estate 1-4 family junior lien mortgage [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member]
By LTV/CLTV:
Loans		421	452
Government Insured Or Guaranteed [Member] | Residential Mortgage [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member]
By LTV/CLTV:
Loans		12,886	15,143
Government Insured Or Guaranteed [Member] | Real estate 1-4 family first mortgage [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member]
By LTV/CLTV:
Loans		12,886	15,143
Government Insured Or Guaranteed [Member] | Real estate 1-4 family junior lien mortgage [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member]
By LTV/CLTV:
Loans		$ 0	$ 0
[1]	(3)Parenthetical amounts represent assets and liabilities for which we are required to carry at fair value or have elected the fair value option.

Loans and Allowance for Cred_14

Loans and Allowance for Credit Losses, Nonaccrual (Details) - USD ($) $ in Millions		Sep. 30, 2018	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	[1]	$ 942,300	$ 956,770
Total Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		501,886	503,388
Commercial and Industrial Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		338,048	333,125
Commercial real estate mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		120,403	126,599
Commercial Real Estate Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		23,690	24,279
Commercial Lease Financing Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		19,745	19,385
Total Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		440,414	453,382
Real estate 1-4 family first mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		284,273	284,054
Real estate 1-4 family junior lien mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		35,330	39,713
Automobile [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		46,075	53,371
Other revolving credit and installment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		36,924	38,268
Residential Real Estate [Member]
Nonaccrual Loans [Abstract]
Mortgage Loans in Process of Foreclosure, Amount		4,900	6,300
Government Guaranteed Mortgage Loans upon Foreclosure Receivable [Member]
Nonaccrual Loans [Abstract]
Mortgage Loans in Process of Foreclosure, Amount		3,500	4,000
Mortgage loans held for sale [Member] | Real estate 1-4 family first mortgage [Member]
Nonaccrual Loans [Abstract]
Nonaccrual loans		132	136
Loans Excluding Certain Loans Acquired In Transfer With Evidence Of Credit Deterioration [Member]
Nonaccrual Loans [Abstract]
Nonaccrual loans		7,053	8,036
Loans Excluding Certain Loans Acquired In Transfer With Evidence Of Credit Deterioration [Member] | Total Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		501,841	503,302
Nonaccrual Loans [Abstract]
Nonaccrual loans		2,298	2,640
Loans Excluding Certain Loans Acquired In Transfer With Evidence Of Credit Deterioration [Member] | Commercial and Industrial Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		338,003	333,039
Nonaccrual Loans [Abstract]
Nonaccrual loans		1,555	1,899
Loans Excluding Certain Loans Acquired In Transfer With Evidence Of Credit Deterioration [Member] | Commercial real estate mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		120,403	126,599
Nonaccrual Loans [Abstract]
Nonaccrual loans		603	628
Loans Excluding Certain Loans Acquired In Transfer With Evidence Of Credit Deterioration [Member] | Commercial Real Estate Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		23,690	24,279
Nonaccrual Loans [Abstract]
Nonaccrual loans		44	37
Loans Excluding Certain Loans Acquired In Transfer With Evidence Of Credit Deterioration [Member] | Commercial Lease Financing Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		19,745	19,385
Nonaccrual Loans [Abstract]
Nonaccrual loans		96	76
Loans Excluding Certain Loans Acquired In Transfer With Evidence Of Credit Deterioration [Member] | Total Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		433,518	440,633
Nonaccrual Loans [Abstract]
Nonaccrual loans		4,755	5,396
Loans Excluding Certain Loans Acquired In Transfer With Evidence Of Credit Deterioration [Member] | Real estate 1-4 family first mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		277,395	271,332
Nonaccrual Loans [Abstract]
Nonaccrual loans		3,605	4,122
Loans Excluding Certain Loans Acquired In Transfer With Evidence Of Credit Deterioration [Member] | Real estate 1-4 family junior lien mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		35,312	39,686
Nonaccrual Loans [Abstract]
Nonaccrual loans		984	1,086
Loans Excluding Certain Loans Acquired In Transfer With Evidence Of Credit Deterioration [Member] | Automobile [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		46,075	53,371
Nonaccrual Loans [Abstract]
Nonaccrual loans		118	130
Loans Excluding Certain Loans Acquired In Transfer With Evidence Of Credit Deterioration [Member] | Other revolving credit and installment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		36,924	38,268
Nonaccrual Loans [Abstract]
Nonaccrual loans		48	58
Criticized [Member] | Loans Excluding Certain Loans Acquired In Transfer With Evidence Of Credit Deterioration [Member] | Total Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		21,437	22,416
Criticized [Member] | Loans Excluding Certain Loans Acquired In Transfer With Evidence Of Credit Deterioration [Member] | Commercial and Industrial Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		15,739	16,608
Criticized [Member] | Loans Excluding Certain Loans Acquired In Transfer With Evidence Of Credit Deterioration [Member] | Commercial real estate mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		4,433	4,287
Criticized [Member] | Loans Excluding Certain Loans Acquired In Transfer With Evidence Of Credit Deterioration [Member] | Commercial Real Estate Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		271	298
Criticized [Member] | Loans Excluding Certain Loans Acquired In Transfer With Evidence Of Credit Deterioration [Member] | Commercial Lease Financing Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		$ 994	$ 1,223
[1]	(3)Parenthetical amounts represent assets and liabilities for which we are required to carry at fair value or have elected the fair value option.

Loans and Allowance for Cred_15

Loans and Allowance for Credit Losses, 90 Days or More Past Due and Still Accruing (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Total Consumer [Member]
Loans 90 days or more past due and still accruing:
90 days or more past due and still accruing	$ 835	$ 1,000
Financing Receivable Acquired With Deteriorated Credit Quality [Member]
Loans 90 days or more past due and still accruing:
90 days or more past due and still accruing	567	1,400
Loans Excluding Certain Loans Acquired In Transfer With Evidence Of Credit Deterioration [Member]
Loans 90 days or more past due and still accruing:
90 days or more past due and still accruing	9,209	11,997
Loans Excluding Certain Loans Acquired In Transfer With Evidence Of Credit Deterioration [Member] | FHA Insured/VA Guaranteed [Member]
Loans 90 days or more past due and still accruing:
90 days or more past due and still accruing	8,276	10,934
Loans Excluding Certain Loans Acquired In Transfer With Evidence Of Credit Deterioration [Member] | Total, not government insured/guaranteed [Member]
Loans 90 days or more past due and still accruing:
90 days or more past due and still accruing	933	1,063
Loans Excluding Certain Loans Acquired In Transfer With Evidence Of Credit Deterioration [Member] | Total, not government insured/guaranteed [Member] | Total Commercial [Member]
Loans 90 days or more past due and still accruing:
90 days or more past due and still accruing	98	49
Loans Excluding Certain Loans Acquired In Transfer With Evidence Of Credit Deterioration [Member] | Total, not government insured/guaranteed [Member] | Commercial and Industrial Loans [Member]
Loans 90 days or more past due and still accruing:
90 days or more past due and still accruing	42	26
Loans Excluding Certain Loans Acquired In Transfer With Evidence Of Credit Deterioration [Member] | Total, not government insured/guaranteed [Member] | Commercial real estate mortgage [Member]
Loans 90 days or more past due and still accruing:
90 days or more past due and still accruing	56	23
Loans Excluding Certain Loans Acquired In Transfer With Evidence Of Credit Deterioration [Member] | Total, not government insured/guaranteed [Member] | Commercial Real Estate Construction [Member]
Loans 90 days or more past due and still accruing:
90 days or more past due and still accruing	0	0
Loans Excluding Certain Loans Acquired In Transfer With Evidence Of Credit Deterioration [Member] | Total, not government insured/guaranteed [Member] | Total Consumer [Member]
Loans 90 days or more past due and still accruing:
90 days or more past due and still accruing	835	1,014
Loans Excluding Certain Loans Acquired In Transfer With Evidence Of Credit Deterioration [Member] | Total, not government insured/guaranteed [Member] | Real estate 1-4 family first mortgage [Member]
Loans 90 days or more past due and still accruing:
90 days or more past due and still accruing	129	219
Loans Excluding Certain Loans Acquired In Transfer With Evidence Of Credit Deterioration [Member] | Total, not government insured/guaranteed [Member] | Real estate 1-4 family junior lien mortgage [Member]
Loans 90 days or more past due and still accruing:
90 days or more past due and still accruing	32	60
Loans Excluding Certain Loans Acquired In Transfer With Evidence Of Credit Deterioration [Member] | Total, not government insured/guaranteed [Member] | Credit Card [Member]
Loans 90 days or more past due and still accruing:
90 days or more past due and still accruing	460	492
Loans Excluding Certain Loans Acquired In Transfer With Evidence Of Credit Deterioration [Member] | Total, not government insured/guaranteed [Member] | Automobile [Member]
Loans 90 days or more past due and still accruing:
90 days or more past due and still accruing	108	143
Loans Excluding Certain Loans Acquired In Transfer With Evidence Of Credit Deterioration [Member] | Total, not government insured/guaranteed [Member] | Other revolving credit and installment [Member]
Loans 90 days or more past due and still accruing:
90 days or more past due and still accruing	$ 106	$ 100

Loans and Allowance for Cred_16

Loans and Allowance for Credit Losses, Impaired Loans (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Impaired Loans [Abstract]
Unpaid principal balance	$ 20,084	$ 22,110
Impaired loans	16,992	18,674
Impaired loans with related allowance for credit losses	9,604	11,639
Related allowance for credit losses	1,480	1,890
Loans and Leases Receivable, Impaired, Commitment to Lend	543	579
Trial modifications [Member]
Impaired Loans [Abstract]
Impaired loans	163	194
Consumer Real Estate Loans Government Guaranteed Or Insured [Member]
Impaired Loans [Abstract]
Impaired loans	1,300	1,400
Total Commercial [Member]
Impaired Loans [Abstract]
Unpaid principal balance	4,672	5,306
Impaired loans	3,488	3,960
Impaired loans with related allowance for credit losses	3,036	3,651
Related allowance for credit losses	499	705
Commercial and Industrial Loans [Member]
Impaired Loans [Abstract]
Unpaid principal balance	3,102	3,577
Impaired loans	2,200	2,568
Impaired loans with related allowance for credit losses	1,806	2,310
Related allowance for credit losses	321	462
Commercial real estate mortgage [Member]
Impaired Loans [Abstract]
Unpaid principal balance	1,311	1,502
Impaired loans	1,107	1,239
Impaired loans with related allowance for credit losses	1,064	1,207
Related allowance for credit losses	142	211
Commercial Real Estate Construction [Member]
Impaired Loans [Abstract]
Unpaid principal balance	111	95
Impaired loans	63	54
Impaired loans with related allowance for credit losses	48	45
Related allowance for credit losses	10	9
Commercial Lease Financing Receivable [Member]
Impaired Loans [Abstract]
Unpaid principal balance	148	132
Impaired loans	118	99
Impaired loans with related allowance for credit losses	118	89
Related allowance for credit losses	26	23
Total Consumer [Member]
Impaired Loans [Abstract]
Unpaid principal balance	15,412	16,804
Impaired loans	13,504	14,714
Impaired loans with related allowance for credit losses	6,568	7,988
Related allowance for credit losses	981	1,185
Real estate 1-4 family first mortgage [Member]
Impaired Loans [Abstract]
Unpaid principal balance	12,719	14,020
Impaired loans	11,087	12,225
Impaired loans with related allowance for credit losses	4,747	6,060
Related allowance for credit losses	571	770
Real estate 1-4 family junior lien mortgage [Member]
Impaired Loans [Abstract]
Unpaid principal balance	1,950	2,135
Impaired loans	1,748	1,918
Impaired loans with related allowance for credit losses	1,216	1,421
Related allowance for credit losses	198	245
Credit Card [Member]
Impaired Loans [Abstract]
Unpaid principal balance	431	356
Impaired loans	431	356
Impaired loans with related allowance for credit losses	431	356
Related allowance for credit losses	167	136
Automobile [Member]
Impaired Loans [Abstract]
Unpaid principal balance	157	157
Impaired loans	91	87
Impaired loans with related allowance for credit losses	45	34
Related allowance for credit losses	8	5
Other revolving credit and installment [Member]
Impaired Loans [Abstract]
Unpaid principal balance	155	136
Impaired loans	147	128
Impaired loans with related allowance for credit losses	129	117
Related allowance for credit losses	$ 37	$ 29

Loans and Allowance for Cred_17

Loans and Allowance for Credit Losses, Impaired Loans, Average Recorded Investment and Interest Income (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average recorded investment	$ 17,426	$ 20,252	$ 17,900	$ 21,168
Recognized interest income	289	265	851	852
Interest income:
Cash basis of accounting	92	64	257	219
Other	197	201	594	633
Total Commercial [Member]
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average recorded investment	3,680	4,664	3,730	4,990
Recognized interest income	77	42	209	165
Commercial and Industrial Loans [Member]
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average recorded investment	2,325	3,208	2,316	3,460
Recognized interest income	59	22	138	91
Commercial real estate mortgage [Member]
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average recorded investment	1,172	1,293	1,225	1,351
Recognized interest income	16	19	66	70
Commercial Real Estate Construction [Member]
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average recorded investment	66	58	62	69
Recognized interest income	2	0	4	3
Commercial Lease Financing Receivable [Member]
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average recorded investment	117	105	127	110
Recognized interest income	0	1	1	1
Total Consumer [Member]
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average recorded investment	13,746	15,588	14,170	16,178
Recognized interest income	212	223	642	687
Real estate 1-4 family first mortgage [Member]
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average recorded investment	11,318	13,044	11,718	13,594
Recognized interest income	165	180	504	555
Real estate 1-4 family junior lien mortgage [Member]
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average recorded investment	1,775	2,009	1,832	2,072
Recognized interest income	29	30	87	92
Credit Card [Member]
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average recorded investment	421	326	396	314
Recognized interest income	14	9	36	26
Automobile [Member]
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average recorded investment	87	86	85	84
Recognized interest income	2	2	8	8
Other revolving credit and installment [Member]
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average recorded investment	145	123	139	114
Recognized interest income	$ 2	$ 2	$ 7	$ 6

Loans and Allowance for Cred_18

Loans and Allowance for Credit Losses, Troubled Debt Restructurings Modifications by Type (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Financing Receivable, Modifications [Line Items]
Net loans	$ 932,279		$ 932,279		$ 945,766
Primary modification type
Financing Receivable, Modifications, Post-Modification Recorded Investment	1,381	$ 1,117	3,681	$ 4,436
Financial effects of modifications
Charge-offs	$ 13	$ 85	$ 53	$ 232
Weighted average interest rate reduction	7.88%	6.56%	7.90%	5.64%
Commercial Portfolio Segment [Member]
Primary modification type
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 940	$ 635	$ 2,173	$ 2,912
Financial effects of modifications
Charge-offs	$ 3	$ 67	$ 23	$ 174
Weighted average interest rate reduction	1.02%	0.85%	0.94%	1.02%
Commercial and Industrial Loans [Member]
Primary modification type
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 805	$ 500	$ 1,759	$ 2,378
Financial effects of modifications
Charge-offs	$ 3	$ 60	$ 23	$ 154
Weighted average interest rate reduction	1.30%	0.34%	0.95%	0.61%
Commercial real estate mortgage [Member]
Primary modification type
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 98	$ 111	$ 334	$ 472
Financial effects of modifications
Charge-offs	$ 0	$ 7	$ 0	$ 20
Weighted average interest rate reduction	0.98%	1.58%	0.94%	1.31%
Commercial Real Estate Construction [Member]
Primary modification type
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 15	$ 1	$ 19	$ 25
Financial effects of modifications
Charge-offs	$ 0	$ 0	$ 0	$ 0
Weighted average interest rate reduction	0.00%	1.85%	0.00%	0.90%
Commercial Lease Financing Receivable [Member]
Primary modification type
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 22	$ 23	$ 61	$ 37
Financial effects of modifications
Charge-offs	$ 0	$ 0	$ 0	$ 0
Weighted average interest rate reduction	0.00%	0.00%	0.00%	0.00%
Consumer Portfolio Segment [Member]
Primary modification type
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 441	$ 482	$ 1,508	$ 1,524
Financial effects of modifications
Charge-offs	$ 10	$ 18	$ 30	$ 58
Weighted average interest rate reduction	8.98%	7.68%	8.77%	6.41%
Real estate 1-4 family first mortgage [Member]
Primary modification type
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 287	$ 335	$ 1,007	$ 1,125
Financial effects of modifications
Charge-offs	$ 1	$ 2	$ 4	$ 14
Weighted average interest rate reduction	2.27%	2.62%	2.31%	2.59%
Real estate 1-4 family junior lien mortgage [Member]
Primary modification type
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 44	$ 46	$ 125	$ 157
Financial effects of modifications
Charge-offs	$ 0	$ 4	$ 3	$ 13
Weighted average interest rate reduction	2.09%	3.97%	1.96%	3.26%
Credit Card [Member]
Primary modification type
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 84	$ 74	$ 253	$ 188
Financial effects of modifications
Charge-offs	$ 0	$ 0	$ 0	$ 0
Weighted average interest rate reduction	12.78%	12.00%	12.42%	12.21%
Automobile [Member]
Primary modification type
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 30	$ 25	$ 66	$ 65
Financial effects of modifications
Charge-offs	$ 9	$ 12	$ 23	$ 30
Weighted average interest rate reduction	5.95%	5.53%	6.25%	5.92%
Other revolving credit and installment [Member]
Primary modification type
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 16	$ 12	$ 45	$ 43
Financial effects of modifications
Charge-offs	$ 0	$ 0	$ 0	$ 1
Weighted average interest rate reduction	8.25%	7.72%	8.04%	7.41%
Trial modifications [Member]
Primary modification type
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ (20)	$ (10)	$ 12	$ (54)
Financial effects of modifications
Charge-offs	$ 0	$ 0	$ 0	$ 0
Weighted average interest rate reduction	0.00%	0.00%	0.00%	0.00%
Modification to principal [Member]
Primary modification type
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 67	$ 53	$ 186	$ 243
Modification to principal [Member] | Commercial Portfolio Segment [Member]
Primary modification type
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	1	3	22
Modification to principal [Member] | Commercial and Industrial Loans [Member]
Primary modification type
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	0	3	17
Modification to principal [Member] | Commercial real estate mortgage [Member]
Primary modification type
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	1	0	5
Modification to principal [Member] | Commercial Real Estate Construction [Member]
Primary modification type
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	0	0	0
Modification to principal [Member] | Commercial Lease Financing Receivable [Member]
Primary modification type
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	0	0	0
Modification to principal [Member] | Consumer Portfolio Segment [Member]
Primary modification type
Financing Receivable, Modifications, Post-Modification Recorded Investment	67	52	183	221
Modification to principal [Member] | Real estate 1-4 family first mortgage [Member]
Primary modification type
Financing Receivable, Modifications, Post-Modification Recorded Investment	58	48	168	196
Modification to principal [Member] | Real estate 1-4 family junior lien mortgage [Member]
Primary modification type
Financing Receivable, Modifications, Post-Modification Recorded Investment	2	3	5	23
Modification to principal [Member] | Credit Card [Member]
Primary modification type
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	0	0	0
Modification to principal [Member] | Automobile [Member]
Primary modification type
Financing Receivable, Modifications, Post-Modification Recorded Investment	7	1	10	2
Modification to principal [Member] | Other revolving credit and installment [Member]
Primary modification type
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	0	0	0
Modification to principal [Member] | Trial modifications [Member]
Primary modification type
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	0	0	0
Contractual Interest Rate Reduction [Member]
Primary modification type
Financing Receivable, Modifications, Post-Modification Recorded Investment	140	158	411	529
Contractual Interest Rate Reduction [Member] | Commercial Portfolio Segment [Member]
Primary modification type
Financing Receivable, Modifications, Post-Modification Recorded Investment	23	31	54	90
Contractual Interest Rate Reduction [Member] | Commercial and Industrial Loans [Member]
Primary modification type
Financing Receivable, Modifications, Post-Modification Recorded Investment	3	19	17	38
Contractual Interest Rate Reduction [Member] | Commercial real estate mortgage [Member]
Primary modification type
Financing Receivable, Modifications, Post-Modification Recorded Investment	20	12	37	51
Contractual Interest Rate Reduction [Member] | Commercial Real Estate Construction [Member]
Primary modification type
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	0	0	1
Contractual Interest Rate Reduction [Member] | Commercial Lease Financing Receivable [Member]
Primary modification type
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	0	0	0
Contractual Interest Rate Reduction [Member] | Consumer Portfolio Segment [Member]
Primary modification type
Financing Receivable, Modifications, Post-Modification Recorded Investment	117	127	357	439
Contractual Interest Rate Reduction [Member] | Real estate 1-4 family first mortgage [Member]
Primary modification type
Financing Receivable, Modifications, Post-Modification Recorded Investment	4	15	22	132
Contractual Interest Rate Reduction [Member] | Real estate 1-4 family junior lien mortgage [Member]
Primary modification type
Financing Receivable, Modifications, Post-Modification Recorded Investment	11	23	31	70
Contractual Interest Rate Reduction [Member] | Credit Card [Member]
Primary modification type
Financing Receivable, Modifications, Post-Modification Recorded Investment	84	74	253	188
Contractual Interest Rate Reduction [Member] | Automobile [Member]
Primary modification type
Financing Receivable, Modifications, Post-Modification Recorded Investment	6	4	14	11
Contractual Interest Rate Reduction [Member] | Other revolving credit and installment [Member]
Primary modification type
Financing Receivable, Modifications, Post-Modification Recorded Investment	12	11	37	38
Contractual Interest Rate Reduction [Member] | Trial modifications [Member]
Primary modification type
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	0	0	0
Modifications, other concessions [Member]
Primary modification type
Financing Receivable, Modifications, Post-Modification Recorded Investment	1,174	906	3,084	3,664
Modifications, other concessions [Member] | Commercial Portfolio Segment [Member]
Primary modification type
Financing Receivable, Modifications, Post-Modification Recorded Investment	917	603	2,116	2,800
Modifications, other concessions [Member] | Commercial and Industrial Loans [Member]
Primary modification type
Financing Receivable, Modifications, Post-Modification Recorded Investment	802	481	1,739	2,323
Modifications, other concessions [Member] | Commercial real estate mortgage [Member]
Primary modification type
Financing Receivable, Modifications, Post-Modification Recorded Investment	78	98	297	416
Modifications, other concessions [Member] | Commercial Real Estate Construction [Member]
Primary modification type
Financing Receivable, Modifications, Post-Modification Recorded Investment	15	1	19	24
Modifications, other concessions [Member] | Commercial Lease Financing Receivable [Member]
Primary modification type
Financing Receivable, Modifications, Post-Modification Recorded Investment	22	23	61	37
Modifications, other concessions [Member] | Consumer Portfolio Segment [Member]
Primary modification type
Financing Receivable, Modifications, Post-Modification Recorded Investment	257	303	968	864
Modifications, other concessions [Member] | Real estate 1-4 family first mortgage [Member]
Primary modification type
Financing Receivable, Modifications, Post-Modification Recorded Investment	225	272	817	797
Modifications, other concessions [Member] | Real estate 1-4 family junior lien mortgage [Member]
Primary modification type
Financing Receivable, Modifications, Post-Modification Recorded Investment	31	20	89	64
Modifications, other concessions [Member] | Credit Card [Member]
Primary modification type
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	0	0	0
Modifications, other concessions [Member] | Automobile [Member]
Primary modification type
Financing Receivable, Modifications, Post-Modification Recorded Investment	17	20	42	52
Modifications, other concessions [Member] | Other revolving credit and installment [Member]
Primary modification type
Financing Receivable, Modifications, Post-Modification Recorded Investment	4	1	8	5
Modifications, other concessions [Member] | Trial modifications [Member]
Primary modification type
Financing Receivable, Modifications, Post-Modification Recorded Investment	(20)	(10)	12	(54)
Modification of recorded investment related to interest rate reduction [Member]
Primary modification type
Financing Receivable, Modifications, Post-Modification Recorded Investment	168	188	489	634
Modification of recorded investment related to interest rate reduction [Member] | Commercial Portfolio Segment [Member]
Primary modification type
Financing Receivable, Modifications, Post-Modification Recorded Investment	23	31	54	90
Modification of recorded investment related to interest rate reduction [Member] | Commercial and Industrial Loans [Member]
Primary modification type
Financing Receivable, Modifications, Post-Modification Recorded Investment	3	18	17	37
Modification of recorded investment related to interest rate reduction [Member] | Commercial real estate mortgage [Member]
Primary modification type
Financing Receivable, Modifications, Post-Modification Recorded Investment	20	13	37	52
Modification of recorded investment related to interest rate reduction [Member] | Commercial Real Estate Construction [Member]
Primary modification type
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	0	0	1
Modification of recorded investment related to interest rate reduction [Member] | Commercial Lease Financing Receivable [Member]
Primary modification type
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	0	0	0
Modification of recorded investment related to interest rate reduction [Member] | Consumer Portfolio Segment [Member]
Primary modification type
Financing Receivable, Modifications, Post-Modification Recorded Investment	145	157	435	544
Modification of recorded investment related to interest rate reduction [Member] | Real estate 1-4 family first mortgage [Member]
Primary modification type
Financing Receivable, Modifications, Post-Modification Recorded Investment	30	41	96	227
Modification of recorded investment related to interest rate reduction [Member] | Real estate 1-4 family junior lien mortgage [Member]
Primary modification type
Financing Receivable, Modifications, Post-Modification Recorded Investment	13	26	35	80
Modification of recorded investment related to interest rate reduction [Member] | Credit Card [Member]
Primary modification type
Financing Receivable, Modifications, Post-Modification Recorded Investment	84	74	253	188
Modification of recorded investment related to interest rate reduction [Member] | Automobile [Member]
Primary modification type
Financing Receivable, Modifications, Post-Modification Recorded Investment	6	4	14	11
Modification of recorded investment related to interest rate reduction [Member] | Other revolving credit and installment [Member]
Primary modification type
Financing Receivable, Modifications, Post-Modification Recorded Investment	12	12	37	38
Modification of recorded investment related to interest rate reduction [Member] | Trial modifications [Member]
Primary modification type
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	0	0	0
Troubled Debt Restructuring Outstanding Balance [Member]
Financing Receivable, Modifications [Line Items]
Net loans	16,200		16,200		$ 17,800
Loans remodified [Member]
Primary modification type
Financing Receivable, Modifications, Post-Modification Recorded Investment	545	394	1,400	1,700
Principal Forgiveness [Member]
Primary modification type
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 5	$ 4	$ 22	$ 23

Loans and Allowance for Cred_19

Loans and Allowance for Credit Losses, Troubled Debt Restructurings, Current Defaults (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Financing Receivable, Modifications [Line Items]
Recorded investment of defaults	$ 117	$ 96	$ 352	$ 320
Commercial Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment of defaults	77	34	226	157
Commercial and Industrial Loans [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment of defaults	42	14	135	106
Commercial real estate mortgage [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment of defaults	35	16	75	47
Commercial Real Estate Construction [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment of defaults	0	4	16	4
Consumer Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment of defaults	40	62	126	163
Real estate 1-4 family first mortgage [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment of defaults	11	32	44	83
Real estate 1-4 family junior lien mortgage [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment of defaults	3	5	10	14
Credit Card [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment of defaults	20	20	57	52
Automobile [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment of defaults	4	4	11	11
Other revolving credit and installment [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment of defaults	$ 2	$ 1	$ 4	$ 3

Loans and Allowance for Cred_20

Loans and Allowance for Credit Losses, PCI Loans Outstanding (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017	Dec. 31, 2008
PCI Loans UPB [Member]
PCI loans [Abstract]
Total PCI loans (unpaid principal balance)	$ 10,126	$ 18,975	$ 98,200
PCI Loans UPB [Member] | Real estate 1-4 family first mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
PCI loans	9,277	16,888
PCI Loans UPB [Member] | Real estate 1-4 family junior lien mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
PCI loans	140	157
PCI Loans Carrying Value [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
PCI loans	6,941	12,835
PCI Loans Carrying Value [Member] | Commercial Real Estate Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
PCI loans	0	0
PCI Loans Carrying Value [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
PCI loans	45	86	18,700
PCI Loans Carrying Value [Member] | Commercial and Industrial Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
PCI loans	45	86
PCI Loans Carrying Value [Member] | Real estate 1-4 family first mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
PCI loans	6,878	12,722
PCI Loans Carrying Value [Member] | Real estate 1-4 family junior lien mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
PCI loans	18	27
PCI Loans Carrying Value [Member] | Commercial real estate mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
PCI loans	0	0
PCI Loans Carrying Value [Member] | Consumer Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
PCI loans	$ 6,896	$ 12,749	$ 40,100

Loans and Allowance for Cred_21

Loans and Allowance for Credit Losses, PCI, Accretable Yield (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		108 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Significant Sales	$ 551	$ 455	$ 1,393	$ 1,940
Change in accretable yield related to PCI loans [Abstract]
Total, beginning of period	5,733		8,887		$ 10,447
Change in accretable yield due to acquisitions	0		0		161
Accretion into interest income	(279)		(892)		(16,983)
Accretion into noninterest income due to sales	(638)		(1,760)		(801)
Reclassification from nonaccretable difference for loans with improving credit-related cash flows	3		402		11,597
Changes in expected cash flows that do not affect nonaccretable difference	(410)		(2,228)		4,466
Total, end of period	4,409		$ 4,409		$ 8,887
PCI Loans Carrying Value [Member] | Pick-A-Pay Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Significant Sales	$ 1,700

Loans and Allowance for Cred_22

Loans and Allowance for Credit Losses, PCI, by Credit Quality Indicator (Details) - Financial Asset Acquired with Credit Deterioration [Member] - Total Commercial [Member] - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
PCI loans	$ 45	$ 86
Pass [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
PCI loans	2	8
Criticized [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
PCI loans	$ 43	$ 78

Loans and Allowance for Cred_23

Loans and Allowance for Credit Losses, PCI, by Delinquency Status, Commercial (Details) - Financial Asset Acquired with Credit Deterioration [Member] - Total Commercial [Member] - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
By delinquency status:
Over 90 DPD and still accruing	$ 0	$ 0
PCI loans	45	86
Current-29 days past due (DPD) and still accruing [Member]
By delinquency status:
PCI loans	44	86
30-89 days past due and still accruing [Member]
By delinquency status:
PCI loans	$ 1	$ 0

Loans and Allowance for Cred_24

Loans and Allowance for Credit Losses, PCI, by Delinquency Status, Consumer (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
PCI Loans UPB [Member] | Real estate 1-4 family first mortgage [Member]
By delinquency status:
PCI loans	$ 9,277	$ 16,888
PCI Loans UPB [Member] | Real estate 1-4 family junior lien mortgage [Member]
By delinquency status:
PCI loans	140	157
PCI Loans UPB [Member] | Residential Mortgage [Member]
By delinquency status:
PCI loans	9,417	17,045
PCI Loans Carrying Value [Member]
By delinquency status:
PCI loans	6,941	12,835
PCI Loans Carrying Value [Member] | Real estate 1-4 family first mortgage [Member]
By delinquency status:
PCI loans	6,878	12,722
PCI Loans Carrying Value [Member] | Real estate 1-4 family junior lien mortgage [Member]
By delinquency status:
PCI loans	18	27
PCI Loans Carrying Value [Member] | Residential Mortgage [Member]
By delinquency status:
PCI loans	6,896	12,749
Current-29 days past due (DPD) [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Real estate 1-4 family first mortgage [Member]
By delinquency status:
PCI loans	7,322	13,127
Current-29 days past due (DPD) [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Real estate 1-4 family junior lien mortgage [Member]
By delinquency status:
PCI loans	127	138
Current-29 days past due (DPD) [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Residential Mortgage [Member]
By delinquency status:
PCI loans	7,449	13,265
Financing Receivables, 30 to 59 Days Past Due [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Real estate 1-4 family first mortgage [Member]
By delinquency status:
PCI loans	776	1,317
Financing Receivables, 30 to 59 Days Past Due [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Real estate 1-4 family junior lien mortgage [Member]
By delinquency status:
PCI loans	5	8
Financing Receivables, 30 to 59 Days Past Due [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Residential Mortgage [Member]
By delinquency status:
PCI loans	781	1,325
Financing Receivables, 60 to 89 Days Past Due [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Real estate 1-4 family first mortgage [Member]
By delinquency status:
PCI loans	409	622
Financing Receivables, 60 to 89 Days Past Due [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Real estate 1-4 family junior lien mortgage [Member]
By delinquency status:
PCI loans	3	3
Financing Receivables, 60 to 89 Days Past Due [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Residential Mortgage [Member]
By delinquency status:
PCI loans	412	625
90-119 Days Past Due [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Real estate 1-4 family first mortgage [Member]
By delinquency status:
PCI loans	161	293
90-119 Days Past Due [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Real estate 1-4 family junior lien mortgage [Member]
By delinquency status:
PCI loans	1	2
90-119 Days Past Due [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Residential Mortgage [Member]
By delinquency status:
PCI loans	162	295
120-179 DPD member [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Real estate 1-4 family first mortgage [Member]
By delinquency status:
PCI loans	91	219
120-179 DPD member [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Real estate 1-4 family junior lien mortgage [Member]
By delinquency status:
PCI loans	1	2
120-179 DPD member [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Residential Mortgage [Member]
By delinquency status:
PCI loans	92	221
180 plus DPD [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Real estate 1-4 family first mortgage [Member]
By delinquency status:
PCI loans	518	1,310
180 plus DPD [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Real estate 1-4 family junior lien mortgage [Member]
By delinquency status:
PCI loans	3	4
180 plus DPD [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Residential Mortgage [Member]
By delinquency status:
PCI loans	$ 521	$ 1,314

Loans and Allowance for Cred_25

Loans and Allowance for Credit Losses, PCI, by FICO Score, Consumer (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
PCI Loans UPB [Member] | Real estate 1-4 family first mortgage [Member]
By FICO:
PCI loans	$ 9,277	$ 16,888
PCI Loans UPB [Member] | Real estate 1-4 family junior lien mortgage [Member]
By FICO:
PCI loans	140	157
PCI Loans UPB [Member] | Residential Mortgage [Member]
By FICO:
PCI loans	9,417	17,045
PCI Loans Carrying Value [Member]
By FICO:
PCI loans	6,941	12,835
PCI Loans Carrying Value [Member] | Real estate 1-4 family first mortgage [Member]
By FICO:
PCI loans	6,878	12,722
PCI Loans Carrying Value [Member] | Real estate 1-4 family junior lien mortgage [Member]
By FICO:
PCI loans	18	27
PCI Loans Carrying Value [Member] | Residential Mortgage [Member]
By FICO:
PCI loans	6,896	12,749
FICO less than 600 [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Real estate 1-4 family first mortgage [Member]
By FICO:
PCI loans	2,070	4,014
FICO less than 600 [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Real estate 1-4 family junior lien mortgage [Member]
By FICO:
PCI loans	29	37
FICO less than 600 [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Residential Mortgage [Member]
By FICO:
PCI loans	2,099	4,051
FICO 600-639 [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Real estate 1-4 family first mortgage [Member]
By FICO:
PCI loans	1,026	2,086
FICO 600-639 [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Real estate 1-4 family junior lien mortgage [Member]
By FICO:
PCI loans	18	20
FICO 600-639 [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Residential Mortgage [Member]
By FICO:
PCI loans	1,044	2,106
FICO 640-679 [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Real estate 1-4 family first mortgage [Member]
By FICO:
PCI loans	1,222	2,393
FICO 640-679 [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Real estate 1-4 family junior lien mortgage [Member]
By FICO:
PCI loans	21	24
FICO 640-679 [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Residential Mortgage [Member]
By FICO:
PCI loans	1,243	2,417
FICO 680-719 [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Real estate 1-4 family first mortgage [Member]
By FICO:
PCI loans	1,266	2,242
FICO 680-719 [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Real estate 1-4 family junior lien mortgage [Member]
By FICO:
PCI loans	24	29
FICO 680-719 [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Residential Mortgage [Member]
By FICO:
PCI loans	1,290	2,271
FICO 720-759 [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Real estate 1-4 family first mortgage [Member]
By FICO:
PCI loans	1,091	1,779
FICO 720-759 [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Real estate 1-4 family junior lien mortgage [Member]
By FICO:
PCI loans	22	23
FICO 720-759 [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Residential Mortgage [Member]
By FICO:
PCI loans	1,113	1,802
FICO 760-799 [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Real estate 1-4 family first mortgage [Member]
By FICO:
PCI loans	654	933
FICO 760-799 [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Real estate 1-4 family junior lien mortgage [Member]
By FICO:
PCI loans	11	12
FICO 760-799 [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Residential Mortgage [Member]
By FICO:
PCI loans	665	945
FICO 800 or more [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Real estate 1-4 family first mortgage [Member]
By FICO:
PCI loans	426	468
FICO 800 or more [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Real estate 1-4 family junior lien mortgage [Member]
By FICO:
PCI loans	6	6
FICO 800 or more [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Residential Mortgage [Member]
By FICO:
PCI loans	432	474
No FICO available [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Real estate 1-4 family first mortgage [Member]
By FICO:
PCI loans	1,522	2,973
No FICO available [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Real estate 1-4 family junior lien mortgage [Member]
By FICO:
PCI loans	9	6
No FICO available [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Residential Mortgage [Member]
By FICO:
PCI loans	$ 1,531	$ 2,979

Loans and Allowance for Cred_26

Loans and Allowance for Credit Losses, PCI, by Loan to Value Ratio, Consumer (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
PCI Loans UPB [Member] | Real estate 1-4 family first mortgage [Member]
By LTV/CLTV:
PCI loans	$ 9,277	$ 16,888
PCI Loans UPB [Member] | Real estate 1-4 family junior lien mortgage [Member]
By LTV/CLTV:
PCI loans	140	157
PCI Loans UPB [Member] | Residential Mortgage [Member]
By LTV/CLTV:
PCI loans	9,417	17,045
PCI Loans Carrying Value [Member]
By LTV/CLTV:
PCI loans	6,941	12,835
PCI Loans Carrying Value [Member] | Real estate 1-4 family first mortgage [Member]
By LTV/CLTV:
PCI loans	6,878	12,722
PCI Loans Carrying Value [Member] | Real estate 1-4 family junior lien mortgage [Member]
By LTV/CLTV:
PCI loans	18	27
PCI Loans Carrying Value [Member] | Residential Mortgage [Member]
By LTV/CLTV:
PCI loans	6,896	12,749
LTV 0-60% [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Real estate 1-4 family first mortgage [Member]
By LTV/CLTV:
PCI loans	5,281	8,010
LTV 0-60% [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Real estate 1-4 family junior lien mortgage [Member]
By LTV/CLTV:
PCI loans	47	45
LTV 0-60% [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Residential Mortgage [Member]
By LTV/CLTV:
PCI loans	5,328	8,055
LTV 60.01-80% [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Real estate 1-4 family first mortgage [Member]
By LTV/CLTV:
PCI loans	3,013	6,510
LTV 60.01-80% [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Real estate 1-4 family junior lien mortgage [Member]
By LTV/CLTV:
PCI loans	54	63
LTV 60.01-80% [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Residential Mortgage [Member]
By LTV/CLTV:
PCI loans	3,067	6,573
LTV 80.01-100% [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Real estate 1-4 family first mortgage [Member]
By LTV/CLTV:
PCI loans	822	1,975
LTV 80.01-100% [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Real estate 1-4 family junior lien mortgage [Member]
By LTV/CLTV:
PCI loans	28	35
LTV 80.01-100% [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Residential Mortgage [Member]
By LTV/CLTV:
PCI loans	850	2,010
LTV 100.01-120% [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Real estate 1-4 family first mortgage [Member]
By LTV/CLTV:
PCI loans	133	319
LTV 100.01-120% [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Real estate 1-4 family junior lien mortgage [Member]
By LTV/CLTV:
PCI loans	8	10
LTV 100.01-120% [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Residential Mortgage [Member]
By LTV/CLTV:
PCI loans	141	329
LTV greater than 120% [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Real estate 1-4 family first mortgage [Member]
By LTV/CLTV:
PCI loans	28	73
LTV greater than 120% [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Real estate 1-4 family junior lien mortgage [Member]
By LTV/CLTV:
PCI loans	1	3
LTV greater than 120% [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Residential Mortgage [Member]
By LTV/CLTV:
PCI loans	29	76
No LTV/CLTV available [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Real estate 1-4 family first mortgage [Member]
By LTV/CLTV:
PCI loans	0	1
No LTV/CLTV available [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Real estate 1-4 family junior lien mortgage [Member]
By LTV/CLTV:
PCI loans	2	1
No LTV/CLTV available [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Residential Mortgage [Member]
By LTV/CLTV:
PCI loans	$ 2	$ 2

Equity Securities (Details)

Equity Securities (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Equity Securities [Line Items]
Trading equity securities	$ 26,138		$ 26,138		$ 30,004
Fair Value of Net Asset (Liability) From Economic Hedges Related To Deferred Compensation Planned Obligation Activities	3,600		3,600		3,700
Equity securities	61,755		61,755		62,497
Income (Loss) from Affordable Housing Projects, Equity Method Investments	283	$ 227	850	$ 684
Affordable Housing Tax Credits and Other Tax Benefits, Amount	352	360	1,100	1,100
Affordable Housing Tax Credits, Amount	282	$ 275	853	$ 796
Qualified Affordable Housing Project Investments, Commitment	3,400		$ 3,400		3,600
Affordable Housing Tax Credits Commitment, Payment Period			3 years
Nonmarketable Equity Securities
Equity Securities [Line Items]
Equity Securities with Fair Value Option Election	6,300		$ 6,300		4,900
Investment in Federal Home Loan Bank Stock
Equity Securities [Line Items]
Other Equity Investments	5,400		5,400		5,400
Not Held for Trading [Member]
Equity Securities [Line Items]
Equity Securities at Fair Value	12,184		12,184		9,223
Equity Method Investments	16,517		16,517		16,352
Equity Securities Not Held for Trading	35,617		35,617		32,493
Not Held for Trading [Member] | Marketable Equity Securities
Equity Securities [Line Items]
Equity Securities at Fair Value	5,705		5,705		4,356
Not Held for Trading [Member] | Nonmarketable Equity Securities
Equity Securities [Line Items]
Equity Securities at Fair Value	6,479		6,479		4,867
Not Held for Trading [Member] | Low Income Housing Tax Credit Equity Method Investments
Equity Securities [Line Items]
Equity Method Investments	10,453		10,453		10,269
Not Held for Trading [Member] | Private Equity Funds [Member]
Equity Securities [Line Items]
Equity Method Investments	3,838		3,838		3,839
Other Equity Investments	1,449		1,449		1,090
Not Held for Trading [Member] | Tax Advantaged Renewable Energy
Equity Securities [Line Items]
Equity Method Investments	1,967		1,967		1,950
Not Held for Trading [Member] | New Market Tax Credit and Other
Equity Securities [Line Items]
Equity Method Investments	259		259		294
Held for Trading [Member] | Marketable Equity Securities
Equity Securities [Line Items]
Trading equity securities	26,138		26,138		30,004
Other investments | Not Held for Trading [Member] | Investment in Federal Home Loan Bank Stock
Equity Securities [Line Items]
Other Equity Investments	$ 5,467		$ 5,467		$ 5,828

Net Gains (Losses) from Equity

Net Gains (Losses) from Equity Securities (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Net Gains (Losses) from Equity Securities [Line Items]
Gain (Loss) on Economic Hedge Derivatives	$ (719)	$ (490)	$ (1,317)	$ (1,164)
Equity Securities at Fair Value
Net Gains (Losses) from Equity Securities [Line Items]
Gain (Loss) on Investments	925	745	1,664	1,909
Equity Method Investments
Net Gains (Losses) from Equity Securities [Line Items]
Gain (Loss) on Investments	210	108	1,147	462
Equity Securities
Net Gains (Losses) from Equity Securities [Line Items]
Gain (Loss) on Investments	416	363	1,494	1,207
Marketable Equity Securities | Equity Securities at Fair Value
Net Gains (Losses) from Equity Securities [Line Items]
Gain (Loss) on Investments	103	231	139	701
Nonmarketable Equity Securities | Equity Securities at Fair Value
Net Gains (Losses) from Equity Securities [Line Items]
Gain (Loss) on Investments	822	514	1,525	1,208
Impairment write-downs | Equity Method Investments
Net Gains (Losses) from Equity Securities [Line Items]
Gain (Loss) on Investments	(45)	(83)	(302)	(181)
Measurement Alternative Observable Transactions | Equity Method Investments
Net Gains (Losses) from Equity Securities [Line Items]
Gain (Loss) on Investments	51	0	314	0
Realized Gains on Sale | Equity Method Investments
Net Gains (Losses) from Equity Securities [Line Items]
Gain (Loss) on Investments	204	175	1,101	565
Other | Equity Method Investments
Net Gains (Losses) from Equity Securities [Line Items]
Gain (Loss) on Investments	0	$ 16	34	$ 78
Measurement alternative
Net Gains (Losses) from Equity Securities [Line Items]
Gain (Loss) on Investments	$ 231		$ 573

Measurement Alternative (Detail

Measurement Alternative (Details) - Measurement alternative - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2018
Measurement Alternative [Line Items]
Gross unrealized gains due to observable price changes	$ 68	$ 339
Gross unrealized losses due to observable price changes	(17)	(25)
Other than Temporary Impairment Losses, Investments	(6)	(18)
Gain (Loss) on Sale of Investments	186	277
Gain (Loss) on Investments	$ 231	573
Cumulative gross unrealized gains due to observable price changes		312
Cumulative gross unrealized losses due to observable price changes		$ (25)

Other Assets (Details)

Other Assets (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Components of Other Assets [Line Items]
Corporate/bank-owned life insurance	$ 19,677	$ 19,549
Accounts receivable (1)	32,965	39,127
Interest receivable	5,986	5,688
Net carrying value	2,226	3,034
Non-residential real estate	205	270
Operating lease assets	9,329	9,666
Due from customers on acceptances	257	177
Other	8,700	13,785
Other assets	78,248	90,244	[1]
Government insured/guaranteed [Member]
Components of Other Assets [Line Items]
Residential real estate	87	120
Non-government insured/guaranteed [Member]
Components of Other Assets [Line Items]
Residential real estate	230	252
Core deposit intangibles [Member]
Components of Other Assets [Line Items]
Net carrying value	192	769
Customer relationship and other amortized intangibles [Member]
Components of Other Assets [Line Items]
Net carrying value	$ 620	$ 841
[1]	(2)Financial information for the prior period has been revised to reflect the impact of the adoption in first quarter 2018 of ASU 2016-01 – Financial Instruments – Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities. See Note 1 (Summary of Significant Accounting Policies) for more information.

Securitizations and Variable _3

Securitizations and Variable Interest Entities, Balance Sheet Transactions with VIEs (Details) - USD ($) $ in Millions		Sep. 30, 2018	Dec. 31, 2017
Variable Interest Entity Consolidated Carrying Amount Assets and Liabilities
Cash		$ 18,791	$ 23,367
Interest-earning deposits with banks (1)		140,732	192,580	[1]
Debt securities:
Trading debt securities		65,188	57,624	[2]
Available-for-sale debt securities		262,964	276,407	[2]
Held-to-maturity, at cost (fair value $139,036 and $138,985)		144,131	139,335
Mortgages held for sale	[3]	19,225	20,070
Loans	[3]	942,300	956,770
Mortgage servicing rights		15,980	13,625
Derivative assets		11,811	12,228
Equity investments		61,755	62,497	[2]
Other assets		78,248	90,244	[2]
Total assets	[4]	1,872,981	1,951,757
Short-term borrowings		105,451	103,256
Derivative liabilities		8,586	8,796
Accrued expenses and other liabilities		71,348	70,615
Long-term debt		221,323	225,020
Total liabilities	[5]	1,673,302	1,743,678
Noncontrolling interests		938	1,143
VIEs that we consolidate recourse [member]
Debt securities:
Total liabilities		0	0
VIEs that we do not consolidate [Member]
Variable Interest Entity Consolidated Carrying Amount Assets and Liabilities
Cash		0	0
Interest-earning deposits with banks (1)		0	0
Debt securities:
Trading debt securities		1,973	1,305
Available-for-sale debt securities		2,806	3,288
Held-to-maturity, at cost (fair value $139,036 and $138,985)		499	485
Loans		1,504	4,274
Mortgage servicing rights		15,930	13,628
Derivative assets		43	44
Equity investments		10,572	10,740
Other assets		0	0
Total assets		33,327	33,764
Short-term borrowings		0	0
Derivative liabilities		92	106
Accrued expenses and other liabilities		242	244
Long-term debt		3,428	3,590
Total liabilities		3,762	3,940
Noncontrolling interests		0	0
Net assets		29,565	29,824
VIEs that we consolidate [Member]
Variable Interest Entity Consolidated Carrying Amount Assets and Liabilities
Cash		112	116
Interest-earning deposits with banks (1)		8	371
Debt securities:
Trading debt securities		0	0
Available-for-sale debt securities		0	0
Held-to-maturity, at cost (fair value $139,036 and $138,985)		0	0
Loans		12,749	12,482
Mortgage servicing rights		0	0
Derivative assets		0	0
Equity investments		61	306
Other assets		210	342
Total assets		13,140	13,617
Short-term borrowings		0	0
Derivative liabilities		0	5
Accrued expenses and other liabilities		154	132
Long-term debt		871	1,479
Total liabilities		1,025	1,616
Noncontrolling interests		37	283
Net assets		12,078	11,718
Transfers that we account for as secured borrowings [Member]
Variable Interest Entity Consolidated Carrying Amount Assets and Liabilities
Cash		0	0
Interest-earning deposits with banks (1)		0	0
Debt securities:
Trading debt securities		200	201
Available-for-sale debt securities		338	358
Held-to-maturity, at cost (fair value $139,036 and $138,985)		0	0
Loans		96	110
Mortgage servicing rights		0	0
Derivative assets		0	0
Equity investments		0	0
Other assets		7	6
Total assets		641	675
Short-term borrowings		512	522
Derivative liabilities		0	0
Accrued expenses and other liabilities		9	10
Long-term debt		97	111
Total liabilities		618	643
Noncontrolling interests		0	0
Net assets		23	32
Total VIE [Member]
Variable Interest Entity Consolidated Carrying Amount Assets and Liabilities
Cash		112	116
Interest-earning deposits with banks (1)		8	371
Debt securities:
Trading debt securities		2,173	1,506
Available-for-sale debt securities		3,144	3,646
Held-to-maturity, at cost (fair value $139,036 and $138,985)		499	485
Loans		14,349	16,866
Mortgage servicing rights		15,930	13,628
Derivative assets		43	44
Equity investments		10,633	11,046
Other assets		217	348
Total assets		47,108	48,056
Short-term borrowings		512	522
Derivative liabilities		92	111
Accrued expenses and other liabilities		405	386
Long-term debt		4,396	5,180
Total liabilities		5,405	6,199
Noncontrolling interests		37	283
Net assets		$ 41,666	$ 41,574
[1]	(1)Financial information has been revised to reflect the impact of the adoption in first quarter 2018 of ASU 2016-18 – Statement of Cash Flows (Topic 230): Restricted Cash in which we changed the presentation of our cash and cash equivalents to include both cash and due from banks as well as interest-earning deposits with banks, which are inclusive of any restricted cash. See Note 1 (Summary of Significant Accounting Policies) for more information.
[2]	(2)Financial information for the prior period has been revised to reflect the impact of the adoption in first quarter 2018 of ASU 2016-01 – Financial Instruments – Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities. See Note 1 (Summary of Significant Accounting Policies) for more information.
[3]	(3)Parenthetical amounts represent assets and liabilities for which we are required to carry at fair value or have elected the fair value option.
[4]	(4)Our consolidated assets at September 30, 2018, and December 31, 2017, include the following assets of certain variable interest entities (VIEs) that can only be used to settle the liabilities of those VIEs: Cash and due from banks, $112 million and $116 million; Interest-earning deposits with banks, $8 million and $371 million; Debt securities, $0 million at both period ends; Net loans, $12.7 billion and $12.5 billion; Derivative assets, $0 million at both period ends; Equity securities, $61 million and $306 million; Other assets, $210 million and $342 million; and Total assets, $13.1 billion and $13.6 billion, respectively.
[5]	(5)Our consolidated liabilities at September 30, 2018, and December 31, 2017, include the following VIE liabilities for which the VIE creditors do not have recourse to Wells Fargo: Derivative liabilities, $0 million and $5 million; Accrued expenses and other liabilities, $154 million and $132 million; Long-term debt, $871 million and $1.5 billion; and Total liabilities, $1.0 billion and $1.6 billion, respectively.

Securitizations and Variable _4

Securitizations and Variable Interest Entities, Unconsolidated VIEs (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Variable Interest Entity [Line Items]
Total VIE assets	$ 1,372,178		$ 1,372,178		$ 1,367,437
Securitizations and Variable Interest Entities Textual [Abstract]
Percentage of underlying collateral rated as investment grade					100.00%
Carrying value of delinquent loans eligible for repurchase	1,000		1,000		$ 2,200
Principal amount that would be payable to securitization vehicles	1,000		1,000		2,200
Conforming Residential Mortgage Loan Securitization [Member]
Variable Interest Entity [Line Items]
Total VIE assets	1,174,883		1,174,883		1,169,410
Other/Nonconforming Residential Mortgage Loan Securitization [Member]
Variable Interest Entity [Line Items]
Total VIE assets	11,158		11,158		14,175
Commercial Mortgage Backed Securities [Member]
Variable Interest Entity [Line Items]
Total VIE assets	151,503		151,503		144,650
Collateralized Debt Obligations Debt Securities [Member]
Variable Interest Entity [Line Items]
Total VIE assets	681		681		1,031
Collateralized Debt Obligations Loans [Member]
Variable Interest Entity [Line Items]
Total VIE assets	0		0		1,481
Asset-based finance structures [Member]
Variable Interest Entity [Line Items]
Total VIE assets	445		445		2,333
Tax Credit Structures [Member]
Variable Interest Entity [Line Items]
Total VIE assets	31,547		31,547		31,852
Collateralized Loan Obligations [Member]
Variable Interest Entity [Line Items]
Total VIE assets	2		2		23
Investment Funds [Member]
Variable Interest Entity [Line Items]
Total VIE assets	221		221		225
Other securitizations and transactions [Member]
Variable Interest Entity [Line Items]
Total VIE assets	1,738		1,738		2,257
VIEs that we do not consolidate [Member] | Waived fees [Member]
Securitizations and Variable Interest Entities Textual [Abstract]
Financial support provided to a nonconsolidated legal entity	10	$ 12	35	$ 39
Debt and equity interests [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	17,354		17,354		20,092
Maximum exposure to loss	17,354		17,354		20,092
Debt and equity interests [Member] | Conforming Residential Mortgage Loan Securitization [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	2,291		2,291		2,100
Maximum exposure to loss	2,291		2,291		2,100
Debt and equity interests [Member] | Other/Nonconforming Residential Mortgage Loan Securitization [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	458		458		598
Maximum exposure to loss	458		458		598
Debt and equity interests [Member] | Commercial Mortgage Backed Securities [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	2,463		2,463		2,198
Maximum exposure to loss	2,463		2,463		2,198
Debt and equity interests [Member] | Collateralized Debt Obligations Debt Securities [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	0		0		0
Maximum exposure to loss	0		0		0
Debt and equity interests [Member] | Collateralized Debt Obligations Loans [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	0		0		1,443
Maximum exposure to loss	0		0		1,443
Debt and equity interests [Member] | Asset-based finance structures [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	330		330		1,867
Maximum exposure to loss	330		330		1,867
Debt and equity interests [Member] | Tax Credit Structures [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	11,511		11,511		11,258
Maximum exposure to loss	11,511		11,511		11,258
Debt and equity interests [Member] | Collateralized Loan Obligations [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	0		0		1
Maximum exposure to loss	0		0		1
Debt and equity interests [Member] | Investment Funds [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	51		51		50
Maximum exposure to loss	51		51		50
Debt and equity interests [Member] | Other securitizations and transactions [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	250		250		577
Maximum exposure to loss	250		250		577
Servicing assets [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	15,930		15,930		13,628
Maximum exposure to loss	15,930		15,930		13,628
Servicing assets [Member] | Conforming Residential Mortgage Loan Securitization [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	14,998		14,998		12,665
Maximum exposure to loss	14,998		14,998		12,665
Servicing assets [Member] | Other/Nonconforming Residential Mortgage Loan Securitization [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	60		60		73
Maximum exposure to loss	60		60		73
Servicing assets [Member] | Commercial Mortgage Backed Securities [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	872		872		890
Maximum exposure to loss	872		872		890
Servicing assets [Member] | Collateralized Debt Obligations Debt Securities [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	0		0		0
Maximum exposure to loss	0		0		0
Servicing assets [Member] | Collateralized Debt Obligations Loans [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	0		0		0
Maximum exposure to loss	0		0		0
Servicing assets [Member] | Asset-based finance structures [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	0		0		0
Maximum exposure to loss	0		0		0
Servicing assets [Member] | Tax Credit Structures [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	0		0		0
Maximum exposure to loss	0		0		0
Servicing assets [Member] | Collateralized Loan Obligations [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	0		0		0
Maximum exposure to loss	0		0		0
Servicing assets [Member] | Investment Funds [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	0		0		0
Maximum exposure to loss	0		0		0
Servicing assets [Member] | Other securitizations and transactions [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	0		0		0
Maximum exposure to loss	0		0		0
Derivative [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	(49)		(49)		(62)
Maximum exposure to loss	152		152		167
Derivative [Member] | Conforming Residential Mortgage Loan Securitization [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	0		0		0
Maximum exposure to loss	0		0		0
Derivative [Member] | Other/Nonconforming Residential Mortgage Loan Securitization [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	0		0		0
Maximum exposure to loss	0		0		0
Derivative [Member] | Commercial Mortgage Backed Securities [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	(92)		(92)		28
Maximum exposure to loss	92		92		42
Derivative [Member] | Collateralized Debt Obligations Debt Securities [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	5		5		5
Maximum exposure to loss	5		5		5
Derivative [Member] | Collateralized Debt Obligations Loans [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	0		0		0
Maximum exposure to loss	0		0		0
Derivative [Member] | Asset-based finance structures [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	0		0		0
Maximum exposure to loss	0		0		0
Derivative [Member] | Tax Credit Structures [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	0		0		0
Maximum exposure to loss	0		0		0
Derivative [Member] | Collateralized Loan Obligations [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	0		0		0
Maximum exposure to loss	0		0		0
Derivative [Member] | Investment Funds [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	0		0		0
Maximum exposure to loss	0		0		0
Derivative [Member] | Other securitizations and transactions [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	38		38		(95)
Maximum exposure to loss	55		55		120
Other commitments and guarantees [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	(3,670)		(3,670)		(3,834)
Maximum exposure to loss	13,488		13,488		12,762
Other commitments and guarantees [Member] | Conforming Residential Mortgage Loan Securitization [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	(185)		(185)		(190)
Maximum exposure to loss	1,146		1,146		1,137
Other commitments and guarantees [Member] | Other/Nonconforming Residential Mortgage Loan Securitization [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	0		0		0
Maximum exposure to loss	0		0		0
Other commitments and guarantees [Member] | Commercial Mortgage Backed Securities [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	(37)		(37)		(34)
Maximum exposure to loss	10,954		10,954		10,202
Other commitments and guarantees [Member] | Collateralized Debt Obligations Debt Securities [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	(20)		(20)		(20)
Maximum exposure to loss	20		20		20
Other commitments and guarantees [Member] | Collateralized Debt Obligations Loans [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	0		0		0
Maximum exposure to loss	0		0		0
Other commitments and guarantees [Member] | Asset-based finance structures [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	0		0		0
Maximum exposure to loss	71		71		71
Other commitments and guarantees [Member] | Tax Credit Structures [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	(3,428)		(3,428)		(3,590)
Maximum exposure to loss	1,140		1,140		1,175
Other commitments and guarantees [Member] | Collateralized Loan Obligations [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	0		0		0
Maximum exposure to loss	0		0		0
Other commitments and guarantees [Member] | Investment Funds [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	0		0		0
Maximum exposure to loss	0		0		0
Other commitments and guarantees [Member] | Other securitizations and transactions [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	0		0		0
Maximum exposure to loss	157		157		157
Total exposure [Member]
Variable Interest Entity [Line Items]
Maximum exposure to loss	46,924		46,924		46,649
Total exposure [Member] | Conforming Residential Mortgage Loan Securitization [Member]
Variable Interest Entity [Line Items]
Maximum exposure to loss	18,435		18,435		15,902
Total exposure [Member] | Other/Nonconforming Residential Mortgage Loan Securitization [Member]
Variable Interest Entity [Line Items]
Maximum exposure to loss	518		518		671
Total exposure [Member] | Commercial Mortgage Backed Securities [Member]
Variable Interest Entity [Line Items]
Maximum exposure to loss	14,381		14,381		13,332
Total exposure [Member] | Collateralized Debt Obligations Debt Securities [Member]
Variable Interest Entity [Line Items]
Maximum exposure to loss	25		25		25
Total exposure [Member] | Collateralized Debt Obligations Loans [Member]
Variable Interest Entity [Line Items]
Maximum exposure to loss	0		0		1,443
Total exposure [Member] | Asset-based finance structures [Member]
Variable Interest Entity [Line Items]
Maximum exposure to loss	401		401		1,938
Total exposure [Member] | Tax Credit Structures [Member]
Variable Interest Entity [Line Items]
Maximum exposure to loss	12,651		12,651		12,433
Total exposure [Member] | Collateralized Loan Obligations [Member]
Variable Interest Entity [Line Items]
Maximum exposure to loss	0		0		1
Total exposure [Member] | Investment Funds [Member]
Variable Interest Entity [Line Items]
Maximum exposure to loss	51		51		50
Total exposure [Member] | Other securitizations and transactions [Member]
Variable Interest Entity [Line Items]
Maximum exposure to loss	462		462		854
Net assets [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	29,565		29,565		29,824
Net assets [Member] | Conforming Residential Mortgage Loan Securitization [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	17,104		17,104		14,575
Net assets [Member] | Other/Nonconforming Residential Mortgage Loan Securitization [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	518		518		671
Net assets [Member] | Commercial Mortgage Backed Securities [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	3,206		3,206		3,082
Net assets [Member] | Collateralized Debt Obligations Debt Securities [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	(15)		(15)		(15)
Net assets [Member] | Collateralized Debt Obligations Loans [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	0		0		1,443
Net assets [Member] | Asset-based finance structures [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	330		330		1,867
Net assets [Member] | Tax Credit Structures [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	8,083		8,083		7,668
Net assets [Member] | Collateralized Loan Obligations [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	0		0		1
Net assets [Member] | Investment Funds [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	51		51		50
Net assets [Member] | Other securitizations and transactions [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	288		288		482
Equity Interests [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	10,600		10,600		10,700
Other investments
Securitizations and Variable Interest Entities Textual [Abstract]
Securities available for sale portfolio of ARS issued by VIEs	43		43		400
Trust preferred securities [Member]
Variable Interest Entity [Line Items]
Carrying value asset (liability)	(1,900)		(1,900)		(2,000)
Trust preferred securities [Member] | Preferred Stock [Member]
Securitizations and Variable Interest Entities Textual [Abstract]
Carrying value - equity	$ 2,500		$ 2,500		$ 2,500

Securitizations and Variable _5

Securitizations and Variable Interest Entities, Cash Flows From Sales and Securitization Activity (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Securitizations and Variable Interest Entities Textual [Abstract]
Amount paid to repurchase loans from securitization vehicles	$ 1,500	$ 2,100	$ 6,200	$ 6,000
Net gain from sale of assets securitizations	690	91	1,900	616
Residential Mortgage [Member]
Securitizations and Variable Interest Entities Textual [Abstract]
Amount transferred related to mortgages to unconsolidated VIE	49,600	57,800	144,600	163,000
Mortgage loans [Member]
Cash Flow Securitizations [Abstract]
Proceeds from securitizations and whole loan sales	53,792	61,756	156,369	172,837
Fees from servicing rights retained	812	826	2,487	2,520
Cash flows from other interests held	221	408	574	1,883
Servicing advances, net of repayments	(24)	(90)	(67)	(252)
Other financial assets [Member]
Cash Flow Securitizations [Abstract]
Proceeds from securitizations and whole loan sales	0	0	0	25
Fees from servicing rights retained	0	0	0	0
Cash flows from other interests held	0	0	1	0
Servicing advances, net of repayments	0	0	0	0
Commercial Loan [Member]
Securitizations and Variable Interest Entities Textual [Abstract]
Net gain from sale of assets securitizations	67	89	196	265
Amount transferred related to mortgages to unconsolidated VIE	4,100	4,600	11,600	11,200
Non-agency securitizations and whole loan transactions [Member] | Mortgage loans [Member]
Cash Flow Securitizations [Abstract]
Repurchases of assets/loss reimbursements	2	5	4	12
Non-agency securitizations and whole loan transactions [Member] | Other financial assets [Member]
Cash Flow Securitizations [Abstract]
Repurchases of assets/loss reimbursements	0	0	0	0
Agency securitizations | Mortgage loans [Member]
Cash Flow Securitizations [Abstract]
Repurchases of assets/loss reimbursements	17	20	69	66
Agency securitizations | Other financial assets [Member]
Cash Flow Securitizations [Abstract]
Repurchases of assets/loss reimbursements	$ 0	$ 0	0	0
Fair Value, Inputs, Level 3 [Member] | Residential Mortgage [Member]
Securitizations and Variable Interest Entities Textual [Abstract]
Amount of servicing asset at fair value			1,500	1,500
Amount of liability for repurchase reserves at fair value			12	20
Fair Value, Inputs, Level 3 [Member] | Commercial Loan [Member]
Securitizations and Variable Interest Entities Textual [Abstract]
Amount of servicing asset at fair value			106	123
Fair Value, Inputs, Level 2 [Member] | Residential Mortgage [Member]
Securitizations and Variable Interest Entities Textual [Abstract]
Securities, at fair value			2,600	2,200
Fair Value, Inputs, Level 2 [Member] | Commercial Loan [Member]
Securitizations and Variable Interest Entities Textual [Abstract]
Securities, at fair value			$ 47	$ 65

Securitizations and Variable _6

Securitizations and Variable Interest Entities, Residential Mortgage Servicing Rights (Details) - Residential mortgage servicing rights [Member] - $ / loan	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Fair Value Assumption, Date of Securitization or Asset-backed Financing Arrangement, Transferor's Continuing Involvement, Servicing Assets or Liabilities [Line Items]
Prepayment speed	11.20%	12.10%	10.50%	11.70%
Discount rate	7.60%	6.90%	7.40%	6.90%
Cost to service ($ per loan)	128	122	130	135

Securitizations and Variable _7

Securitizations and Variable Interest Entities, Retained Interests from Unconsolidated VIEs (Details) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2018USD ($)$ / loan	Dec. 31, 2017USD ($)$ / loan
Residential mortgage servicing rights [Member]
Sensitivity Analysis of Fair Value of Interests Continued to be Held by Transferor, Servicing Assets or Liabilities, Impact of Adverse Change in Assumption [Line Items]
Fair value of interests held	$ 15,980	$ 13,625
Expected weighted-average life (in years)	6 years 10 months 24 days	6 years 2 months 12 days
Key economic assumptions:
Prepayment speed assumption	9.00%	10.50%
Decrease in fair value from:
10% adverse change	$ 572	$ 565
25% adverse change	$ 1,361	$ 1,337
Discount rate assumption	7.20%	6.90%
Decrease in fair value from:
100 basis point increase	$ 727	$ 652
200 basis point increase	$ 1,386	$ 1,246
Cost to service assumption ($ per loan) | $ / loan	129	143
Decrease in fair value from:
10% adverse change	$ 442	$ 467
25% adverse change	1,100	1,169
Interest-Only Strips [Member]
Sensitivity Analysis of Fair Value of Interests Continued to be Held by Transferor, Servicing Assets or Liabilities, Impact of Adverse Change in Assumption [Line Items]
Fair value of interests held	$ 17	$ 19
Expected weighted-average life (in years)	3 years 9 months 18 days	3 years 3 months 18 days
Key economic assumptions:
Prepayment speed assumption	16.80%	20.00%
Decrease in fair value from:
10% adverse change	$ 1	$ 1
25% adverse change	$ 1	$ 2
Discount rate assumption	14.70%	14.80%
Decrease in fair value from:
100 basis point increase	$ 0	$ 0
200 basis point increase	1	1
Subordinated bonds [Member] | Commercial securitizations [Member]
Sensitivity Analysis of Fair Value of Interests Continued to be Held by Transferor, Servicing Assets or Liabilities, Impact of Adverse Change in Assumption [Line Items]
Fair value of interests held	$ 677	$ 596
Expected weighted-average life (in years)	6 years 9 months 18 days	6 years 8 months 12 days
Decrease in fair value from:
Discount rate assumption	4.10%	4.10%
Decrease in fair value from:
100 basis point increase	$ 37	$ 32
200 basis point increase	$ 71	$ 61
Decrease in fair value from:
Credit loss assumption	4.90%	1.80%
Decrease in fair value from:
10% higher losses	$ 2	$ 0
25% higher losses	5	0
Senior bonds [Member] | Commercial securitizations [Member]
Sensitivity Analysis of Fair Value of Interests Continued to be Held by Transferor, Servicing Assets or Liabilities, Impact of Adverse Change in Assumption [Line Items]
Fair value of interests held	$ 270	$ 468
Expected weighted-average life (in years)	5 years 3 months 18 days	5 years 2 months 12 days
Decrease in fair value from:
Discount rate assumption	3.80%	3.10%
Decrease in fair value from:
100 basis point increase	$ 12	$ 20
200 basis point increase	$ 23	$ 39
Decrease in fair value from:
Credit loss assumption	0.00%	0.00%
Decrease in fair value from:
10% higher losses	$ 0	$ 0
25% higher losses	0	0
Commercial mortgage servicing [Member]
Sensitivity Analysis of Fair Value of Interests Continued to be Held by Transferor, Servicing Assets or Liabilities, Impact of Adverse Change in Assumption [Line Items]
Fair value of interests held	$ 2,400	$ 2,000
Securitizations and Variable Interest Entities Textual [Abstract]
Percentage of adverse change in interest rate	25.00%	25.00%
Decrease in fair value from 25% adverse change in interest rate	$ 347	$ 278

Securitizations and Variable _8

Securitizations and Variable Interest Entities, Off-Balance Sheet Loans Sold or Securitized (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Principal Balances - Off-Balance Sheet Securitized Loans [Abstract]
Total loans	$ 1,212,952		$ 1,227,083
Delinquent loans and foreclosed assets	11,860		16,232
Net charge-offs	612	$ 1,264
FNMA, FHLMC and GNMA [Member]
Principal Balances - Off-Balance Sheet Securitized Loans [Abstract]
Total loans	1,100,000		1,100,000
Securitizations and Variable Interest Entities Textual [Abstract]
Foreclosed assets	455		619
Delinquent loans	6,600		9,100
Total Commercial [Member]
Principal Balances - Off-Balance Sheet Securitized Loans [Abstract]
Total loans	102,384		100,875
Delinquent loans and foreclosed assets	1,997		2,839
Net charge-offs	244	718
Securitizations and Variable Interest Entities Textual [Abstract]
Foreclosed assets	1,300		1,200
Commercial real estate mortgage [Member]
Principal Balances - Off-Balance Sheet Securitized Loans [Abstract]
Total loans	102,384		100,875
Delinquent loans and foreclosed assets	1,997		2,839
Net charge-offs	244	718
Total Consumer [Member]
Principal Balances - Off-Balance Sheet Securitized Loans [Abstract]
Total loans	1,110,568		1,126,208
Delinquent loans and foreclosed assets	9,863		13,393
Net charge-offs	368	546
Securitizations and Variable Interest Entities Textual [Abstract]
Foreclosed assets	656		879
Real estate 1-4 family first mortgage [Member]
Principal Balances - Off-Balance Sheet Securitized Loans [Abstract]
Total loans	1,110,568		1,126,208
Delinquent loans and foreclosed assets	9,863		$ 13,393
Net charge-offs	$ 368	$ 546

Securitizations and Variable _9

Securitizations and Variable Interest Entities, Transactions with Consolidated VIEs and Secured Borrowings (Details) - USD ($) $ in Millions		Sep. 30, 2018	Dec. 31, 2017
Variable Interest Entity [Line Items]
Assets	[1]	$ 1,872,981	$ 1,951,757
Liabilities	[2]	(1,673,302)	(1,743,678)
Noncontrolling interests		(938)	(1,143)
Total secured borrowings [Member]
Variable Interest Entity [Line Items]
Total VIE assets		746	771
Total secured borrowings [Member] | Municipal tender option bond securitizations [Member]
Variable Interest Entity [Line Items]
Total VIE assets		647	658
Total secured borrowings [Member] | Residential mortgage securitizations [Member]
Variable Interest Entity [Line Items]
Total VIE assets		99	113
Consolidated VIEs [Member]
Variable Interest Entity [Line Items]
Total VIE assets		13,419	14,424
Assets		13,140	13,617
Liabilities		(1,025)	(1,616)
Noncontrolling interests		(37)	(283)
Net assets		12,078	11,718
Consolidated VIEs [Member] | Commercial real estate loans [Member]
Variable Interest Entity [Line Items]
Total VIE assets		3,648	2,378
Consolidated VIEs [Member] | Commercial and Industrial Loans and Leases [Member]
Variable Interest Entity [Line Items]
Total VIE assets		7,571	9,116
Consolidated VIEs [Member] | Nonconforming residential mortgage loan securitizations [Member]
Variable Interest Entity [Line Items]
Total VIE assets		2,127	2,515
Consolidated VIEs [Member] | Structured asset finance [Member]
Variable Interest Entity [Line Items]
Total VIE assets		0	10
Consolidated VIEs [Member] | Investment funds [Member]
Variable Interest Entity [Line Items]
Total VIE assets		61	305
Consolidated VIEs [Member] | Other securitizations and transactions [Member]
Variable Interest Entity [Line Items]
Total VIE assets		12	100
Total secured borrowings and consolidated VIEs [Member]
Variable Interest Entity [Line Items]
Total VIE assets		14,165	15,195
Carrying value [Member] | Total secured borrowings [Member]
Variable Interest Entity [Line Items]
Assets		641	675
Liabilities		(618)	(643)
Noncontrolling interests		0	0
Net assets		23	32
Carrying value [Member] | Total secured borrowings [Member] | Municipal tender option bond securitizations [Member]
Variable Interest Entity [Line Items]
Assets		545	565
Liabilities		(521)	(532)
Noncontrolling interests		0	0
Net assets		24	33
Carrying value [Member] | Total secured borrowings [Member] | Residential mortgage securitizations [Member]
Variable Interest Entity [Line Items]
Assets		96	110
Liabilities		(97)	(111)
Noncontrolling interests		0	0
Net assets		(1)	(1)
Carrying value [Member] | Consolidated VIEs [Member]
Variable Interest Entity [Line Items]
Assets		13,140	13,617
Liabilities		(1,025)	(1,616)
Noncontrolling interests		(37)	(283)
Net assets		12,078	11,718
Carrying value [Member] | Consolidated VIEs [Member] | Commercial real estate loans [Member]
Variable Interest Entity [Line Items]
Assets		3,648	2,378
Liabilities		0	0
Noncontrolling interests		0	0
Net assets		3,648	2,378
Carrying value [Member] | Consolidated VIEs [Member] | Commercial and Industrial Loans and Leases [Member]
Variable Interest Entity [Line Items]
Assets		7,546	8,626
Liabilities		(447)	(915)
Noncontrolling interests		(13)	(29)
Net assets		7,086	7,682
Carrying value [Member] | Consolidated VIEs [Member] | Nonconforming residential mortgage loan securitizations [Member]
Variable Interest Entity [Line Items]
Assets		1,873	2,212
Liabilities		(576)	(694)
Noncontrolling interests		0	0
Net assets		1,297	1,518
Carrying value [Member] | Consolidated VIEs [Member] | Structured asset finance [Member]
Variable Interest Entity [Line Items]
Assets		0	6
Liabilities		0	(4)
Noncontrolling interests		0	0
Net assets		0	2
Carrying value [Member] | Consolidated VIEs [Member] | Investment funds [Member]
Variable Interest Entity [Line Items]
Assets		61	305
Liabilities		(1)	(2)
Noncontrolling interests		(18)	(230)
Net assets		42	73
Carrying value [Member] | Consolidated VIEs [Member] | Other securitizations and transactions [Member]
Variable Interest Entity [Line Items]
Assets		12	90
Liabilities		(1)	(1)
Noncontrolling interests		(6)	(24)
Net assets		5	65
Carrying value [Member] | Total secured borrowings and consolidated VIEs [Member]
Variable Interest Entity [Line Items]
Assets		13,781	14,292
Liabilities		(1,643)	(2,259)
Noncontrolling interests		(37)	(283)
Net assets		$ 12,101	$ 11,750
[1]	(4)Our consolidated assets at September 30, 2018, and December 31, 2017, include the following assets of certain variable interest entities (VIEs) that can only be used to settle the liabilities of those VIEs: Cash and due from banks, $112 million and $116 million; Interest-earning deposits with banks, $8 million and $371 million; Debt securities, $0 million at both period ends; Net loans, $12.7 billion and $12.5 billion; Derivative assets, $0 million at both period ends; Equity securities, $61 million and $306 million; Other assets, $210 million and $342 million; and Total assets, $13.1 billion and $13.6 billion, respectively.
[2]	(5)Our consolidated liabilities at September 30, 2018, and December 31, 2017, include the following VIE liabilities for which the VIE creditors do not have recourse to Wells Fargo: Derivative liabilities, $0 million and $5 million; Accrued expenses and other liabilities, $154 million and $132 million; Long-term debt, $871 million and $1.5 billion; and Total liabilities, $1.0 billion and $1.6 billion, respectively.

Mortgage Banking Activities, An

Mortgage Banking Activities, Analysis of Changes in Fair Value MSRs (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Changes in MSRs measured at fair value
Fair value, beginning of period			$ 13,625
Changes in fair value:
Net changes in valuation model inputs or assumptions	$ 531	$ (142)	2,206	$ (328)
Changes due to collection/realization of expected cash flows over time	(462)	(519)	(1,405)	(1,467)
Total changes in fair value	69	(661)	801	(1,795)
Fair value, end of period	15,980		15,980
Carried at fair value [Member]
Changes in MSRs measured at fair value
Fair value, beginning of period	15,411	12,789	13,625	12,959
Purchases	0	541	0	541
Servicing from securitizations or asset transfers (1)	502	605	1,561	1,624
Sales and other (2)	(2)	64	(7)	9
Net additions	500	1,210	1,554	2,174
Changes in fair value:
Net changes in valuation model inputs or assumptions	531	(142)	2,206	(328)
Changes due to collection/realization of expected cash flows over time	(462)	(519)	(1,405)	(1,467)
Total changes in fair value	69	(661)	801	(1,795)
Fair value, end of period	15,980	13,338	15,980	13,338
Carried at fair value [Member] | Mortgage interest rates [Member]
Changes in fair value:
Net changes in valuation model inputs or assumptions	582	(171)	2,211	(324)
Carried at fair value [Member] | Servicing and foreclosure costs [Member]
Changes in fair value:
Net changes in valuation model inputs or assumptions	(9)	60	55	73
Carried at fair value [Member] | Discount rates [Member]
Changes in fair value:
Net changes in valuation model inputs or assumptions	(9)	0	(9)	0
Carried at fair value [Member] | Prepayment estimates and other [Member]
Changes in fair value:
Net changes in valuation model inputs or assumptions	$ (33)	$ (31)	$ (51)	$ (77)

Mortgage Banking Activities, _2

Mortgage Banking Activities, Analysis of Changes in Amortized MSRs (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Changes in amortized MSRs
Amortization	$ (68)	$ (65)	$ (198)	$ (198)
Amortized [Member]
Changes in amortized MSRs
Balance, beginning of period	1,407	1,399	1,424	1,406
Purchases	42	31	82	75
Servicing from securitizations or asset transfers	33	41	106	123
Amortization	(68)	(65)	(198)	(198)
Balance, end of period	1,414	1,406	1,414	1,406
Fair value of amortized MSRs:
Beginning of period	2,309	1,989	2,025	1,956
End of period	2,389	1,990	2,389	1,990
Commercial mortgage servicing [Member] | Amortized [Member]
Mortgage Banking Activities (Textual) [Abstract]
Valuation allowance	$ 0	$ 0	$ 0	$ 0

Mortgage Banking Activities, Ma

Mortgage Banking Activities, Managed Servicing Portfolio (Details) - USD ($) $ in Billions	Sep. 30, 2018	Dec. 31, 2017
Components of Managed Servicing Portfolio [Abstract]
Serviced for others	$ 1,713	$ 1,704
Total managed servicing portfolio	$ 2,185	$ 2,185
Ratio of MSRs to related loans serviced for others	1.02%	0.88%
Residential mortgage servicing rights [Member]
Components of Managed Servicing Portfolio [Abstract]
Serviced for others	$ 1,184	$ 1,209
Owned loans serviced	337	342
Subserviced for others	5	3
Total managed servicing portfolio	1,526	1,554
Commercial mortgage servicing [Member]
Components of Managed Servicing Portfolio [Abstract]
Serviced for others	529	495
Owned loans serviced	121	127
Subserviced for others	9	9
Total managed servicing portfolio	$ 659	$ 631

Mortgage Banking Activities, Mo

Mortgage Banking Activities, Mortgage Banking Noninterest Income (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Servicing fees:
Contractually specified servicing fees	$ 880	$ 889	$ 2,697	$ 2,696
Late charges	40	41	126	133
Ancillary fees	49	51	136	160
Unreimbursed direct servicing costs	(79)	(186)	(258)	(430)
Net servicing fees	890	795	2,701	2,559
Changes in fair value of MSRs carried at fair value:
Due to changes in valuation model inputs or assumptions	531	(142)	2,206	(328)
Changes due to collection/realization of expected cash flows over time	(462)	(519)	(1,405)	(1,467)
Total changes in fair value of MSRs carried at fair value	69	(661)	801	(1,795)
Amortization	(68)	(65)	(198)	(198)
Net Derivative Gains (Losses) From Economic Hedges Related To Mortgage Servicing Activities	(501)	240	(2,040)	599
Total servicing income, net	390	309	1,264	1,165
Net gains on mortgage loan origination/sales activities	456	737	1,286	2,257
Total mortgage banking noninterest income	846	1,046	2,550	3,422
Market-related valuation changes to MSRs, net of hedge results	$ 30	$ 98	$ 166	$ 271

Mortgage Banking Activities, _3

Mortgage Banking Activities, Analysis of Changes in Liability for Mortgage Loan Repurchase Losses (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Liability For Mortgage Loan Repurchase Losses [Abstract]
Balance, beginning of period	$ 179	$ 178	$ 181	$ 229
Assumed with MSR purchases	0	10	0	10
Provision for repurchase losses:
Loan sales	5	6	12	20
Change in estimate	(4)	(12)	(5)	(65)
Net additions (reductions) to provision	1	(6)	7	(45)
Losses	(2)	(3)	(10)	(15)
Balance, end of period	178	$ 179	178	$ 179
Liability For Mortgage Loans Repurchase Losses [Member]
Mortgage Banking Activities (Textual) [Abstract]
Range of possible loss, portion not accrued	$ 201		$ 201

Intangible Assets (Details)

Intangible Assets (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017	Sep. 30, 2017	Dec. 31, 2016
Amortized intangible assets:
Gross carrying value	$ 20,895	$ 20,704
Accumulated amortization	(18,669)	(17,670)
Net carrying value	2,226	3,034
Unamortized intangible assets:
Mortgage servicing rights	15,980	13,625
Goodwill	26,425	26,587	$ 26,581	$ 26,693
Trademark	14	14
MSRs [Member]
Amortized intangible assets:
Gross carrying value	4,064	3,876
Accumulated amortization	(2,650)	(2,452)
Net carrying value	1,414	1,424
Core deposit intangibles [Member]
Amortized intangible assets:
Gross carrying value	12,834	12,834
Accumulated amortization	(12,642)	(12,065)
Net carrying value	192	769
Customer relationship and other intangibles [Member]
Amortized intangible assets:
Gross carrying value	3,997	3,994
Accumulated amortization	(3,377)	(3,153)
Net carrying value	$ 620	$ 841

Intangible Assets, Amortization

Intangible Assets, Amortization Expense (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Finite-Lived Intangible Assets, Future Amortization Expense, Current and Five Succeeding Fiscal Years [Abstract]
Nine months ended September 30, 2018 (actual)	$ 264	$ 288	$ 794	$ 864
Estimate for the remainder of 2018	334		334
Estimate for year ended December 31,
2,019	364		364
2,020	317		317
2,021	272		272
2,022	237		237
2,023	200		200
Finite lived intangible assets [Member]
Finite-Lived Intangible Assets, Future Amortization Expense, Current and Five Succeeding Fiscal Years [Abstract]
Nine months ended September 30, 2018 (actual)			999
Amortized MSRs [Member]
Finite-Lived Intangible Assets, Future Amortization Expense, Current and Five Succeeding Fiscal Years [Abstract]
Nine months ended September 30, 2018 (actual)			198
Estimate for the remainder of 2018	67		67
Estimate for year ended December 31,
2,019	247		247
2,020	220		220
2,021	189		189
2,022	168		168
2,023	141		141
Core deposit intangibles [Member]
Finite-Lived Intangible Assets, Future Amortization Expense, Current and Five Succeeding Fiscal Years [Abstract]
Nine months ended September 30, 2018 (actual)			577
Estimate for the remainder of 2018	192		192
Estimate for year ended December 31,
2,019	0		0
2,020	0		0
2,021	0		0
2,022	0		0
2,023	0		0
Customer relationship and other amortized intangibles [Member]
Finite-Lived Intangible Assets, Future Amortization Expense, Current and Five Succeeding Fiscal Years [Abstract]
Nine months ended September 30, 2018 (actual)			224
Estimate for the remainder of 2018	75		75
Estimate for year ended December 31,
2,019	117		117
2,020	97		97
2,021	83		83
2,022	69		69
2,023	$ 59		59
Lease agreement intangibles [Member]
Finite-Lived Intangible Assets, Future Amortization Expense, Current and Five Succeeding Fiscal Years [Abstract]
Nine months ended September 30, 2018 (actual)			$ 7

Intangible Assets, Allocation o

Intangible Assets, Allocation of Goodwill to Operating Segments (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Goodwill [Roll Forward]
Goodwill, Beginning Balance	$ 26,587	$ 26,693
Goodwill reclass for held for sale	(155)	(116)
Reduction in goodwill related to divested businesses and other	(7)	(20)
Goodwill from business combinations		24
Goodwill, Ending Balance	26,425	26,581
Goodwill classified as held-for-sale in other assets	12	116
Community Banking [Member]
Goodwill [Roll Forward]
Goodwill, Beginning Balance	16,849	16,849
Goodwill reclass for held for sale	(155)	0
Reduction in goodwill related to divested businesses and other	(6)	0
Goodwill from business combinations		0
Goodwill, Ending Balance	16,688	16,849
Wholesale Banking [Member]
Goodwill [Roll Forward]
Goodwill, Beginning Balance	8,455	8,585
Goodwill reclass for held for sale	0	(116)
Reduction in goodwill related to divested businesses and other	(1)	(20)
Goodwill from business combinations		0
Goodwill, Ending Balance	8,454	8,449
Wealth and Investment Management [Member]
Goodwill [Roll Forward]
Goodwill, Beginning Balance	1,283	1,259
Goodwill reclass for held for sale	0	0
Reduction in goodwill related to divested businesses and other	0	0
Goodwill from business combinations		24
Goodwill, Ending Balance	$ 1,283	$ 1,283

Guarantees, Pledged Assets an_3

Guarantees, Pledged Assets and Collateral (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Guarantor Obligations [Line Items]
Carrying Value obligation (asset)		$ (399)		$ (399)		$ (364)
Maximum exposure to loss, expires in one year or less		29,600		29,600		31,034
Maximum exposure to loss, expires in one year through three years		19,800		19,800		21,147
Maximum exposure to loss, expires in three years through five years		7,108		7,108		7,896
Maximum exposure to loss, expires after five years		14,953		14,953		16,052
Maximum exposure to loss		71,461		71,461		76,129
Total assets	[1]	1,872,981		1,872,981		1,951,757
Securities owned and pledged as collateral related to repurchase agreements not available to be repledged, Fair Value		4,300		4,300		5,200
Mortgages held for sale		1,400		1,400		2,600
Carrying value of delinquent loans eligible for repurchase		1,000		1,000		2,200
Security Owned and Pledged as Collateral, Fair Value [Abstract]
Equity Securities, Trading		26,138		26,138		30,004
Total pledged assets held for trading		103,706		103,706		100,362
Total pledged assets		613,216		613,216		652,300
Not Held for Trading [Member]
Security Owned and Pledged as Collateral, Fair Value [Abstract]
Debt securities and other, not held for trading		56,327		56,327		73,592
Mortgages held for sale and loans		451,031		451,031		469,554
Total pledged assets		507,358		507,358		543,146
Collateral Pledged [Member]
Security Owned and Pledged as Collateral, Fair Value [Abstract]
Debt Securities, Trading		94,862		94,862		96,993
Equity Securities, Trading		10,996		10,996		12,161
Total pledged assets held for trading		105,858		105,858		109,154
Non-investment grade [Member]
Guarantor Obligations [Line Items]
Maximum exposure to loss		34,210		34,210		36,692
Written put options [Member]
Guarantor Obligations [Line Items]
Carrying Value obligation (asset)		(486)		(486)		(455)
Maximum exposure to loss, expires in one year or less		14,420		14,420		14,758
Maximum exposure to loss, expires in one year through three years		11,122		11,122		12,706
Maximum exposure to loss, expires in three years through five years		2,876		2,876		3,890
Maximum exposure to loss, expires after five years		702		702		1,038
Maximum exposure to loss		29,120		29,120		32,392
Written put options [Member] | Non-investment grade [Member]
Guarantor Obligations [Line Items]
Maximum exposure to loss		16,703		16,703		19,087
Direct pay letters of credit (DPLCs) [Member]
Guarantor Obligations [Line Items]
Maximum exposure to loss		7,200		7,200		8,100
Third Party Clearing Indemnifications [Member]
Guarantor Obligations [Line Items]
Maximum exposure to loss		1,500		1,500		809
Third-party Clearing Customer Obligations		115		115		92
Collateral Provided to Third-party Clearing Agents		1,300		1,300		717
Standby Letters of Credit [Member]
Guarantor Obligations [Line Items]
Carrying Value obligation (asset)		36		36		39
Maximum exposure to loss, expires in one year or less		14,051		14,051		15,357
Maximum exposure to loss, expires in one year through three years		8,024		8,024		7,908
Maximum exposure to loss, expires in three years through five years		3,051		3,051		3,068
Maximum exposure to loss, expires after five years		476		476		645
Maximum exposure to loss		25,602		25,602		26,978
Standby Letters of Credit [Member] | Non-investment grade [Member]
Guarantor Obligations [Line Items]
Maximum exposure to loss		8,025		8,025		8,773
Securities lending and other indemnifications [Member]
Guarantor Obligations [Line Items]
Carrying Value obligation (asset)		0		0		0
Maximum exposure to loss, expires in one year or less		0		0		0
Maximum exposure to loss, expires in one year through three years		0		0		0
Maximum exposure to loss, expires in three years through five years		0		0		2
Maximum exposure to loss, expires after five years		1,454		1,454		809
Maximum exposure to loss		1,454		1,454		811
Securities lending and other indemnifications [Member] | Non-investment grade [Member]
Guarantor Obligations [Line Items]
Maximum exposure to loss		0		0		2
Loans and MHFS sold with recourse [Member]
Guarantor Obligations [Line Items]
Carrying Value obligation (asset)		50		50		51
Maximum exposure to loss, expires in one year or less		148		148		165
Maximum exposure to loss, expires in one year through three years		654		654		533
Maximum exposure to loss, expires in three years through five years		1,178		1,178		934
Maximum exposure to loss, expires after five years		9,540		9,540		9,385
Maximum exposure to loss		11,520		11,520		11,017
Loans and MHFS sold with recourse [Member] | Non-investment grade [Member]
Guarantor Obligations [Line Items]
Maximum exposure to loss		8,587		8,587		8,155
Factoring guarantee [Member]
Guarantor Obligations [Line Items]
Carrying Value obligation (asset)		0		0		0
Maximum exposure to loss, expires in one year or less		978		978		747
Maximum exposure to loss, expires in one year through three years		0		0		0
Maximum exposure to loss, expires in three years through five years		0		0		0
Maximum exposure to loss, expires after five years		0		0		0
Maximum exposure to loss		978		978		747
Factoring guarantee [Member] | Non-investment grade [Member]
Guarantor Obligations [Line Items]
Maximum exposure to loss		891		891		668
Other guarantees [Member]
Guarantor Obligations [Line Items]
Carrying Value obligation (asset)		1		1		1
Maximum exposure to loss, expires in one year or less		3		3		7
Maximum exposure to loss, expires in one year through three years		0		0		0
Maximum exposure to loss, expires in three years through five years		3		3		2
Maximum exposure to loss, expires after five years		2,781		2,781		4,175
Maximum exposure to loss		2,787		2,787		4,184
Other guarantees [Member] | Non-investment grade [Member]
Guarantor Obligations [Line Items]
Maximum exposure to loss		4		4		7
Loans and MHFS sold with recourse [Member]
Guarantor Obligations [Line Items]
Loans repurchased		1	$ 1	2	$ 3
Trading assets and other [Member]
Guarantor Obligations [Line Items]
Securities owned and pledged as collateral available to be repledged, Fair Value		105,800		105,800		109,000
Trading assets and other [Member] | Collateral Pledged [Member]
Security Owned and Pledged as Collateral, Fair Value [Abstract]
Total pledged assets held for trading		47,200		47,200		41,900
Other Trading - Off-Balance Sheet [Member] | Collateral Pledged [Member]
Security Owned and Pledged as Collateral, Fair Value [Abstract]
Total pledged assets held for trading		58,600		58,600		67,300
Debt securities and other [Member] | Not Held for Trading [Member]
Guarantor Obligations [Line Items]
Securities owned and pledged as collateral available to be repledged, Fair Value		50		50		64
Securities owned and pledged as collateral related to repurchase agreements not available to be repledged, carrying value		4,300		4,300		5,000
Securities owned and pledged as collateral related to repurchase agreements not available to be repledged, Fair Value		4,100		4,100		5,000
Consolidated VIEs [Member]
Guarantor Obligations [Line Items]
Total assets		13,140		13,140		13,617
Secured Borrowing transactions excluded [Member]
Guarantor Obligations [Line Items]
Total assets		$ 641		$ 641		$ 675
[1]	(4)Our consolidated assets at September 30, 2018, and December 31, 2017, include the following assets of certain variable interest entities (VIEs) that can only be used to settle the liabilities of those VIEs: Cash and due from banks, $112 million and $116 million; Interest-earning deposits with banks, $8 million and $371 million; Debt securities, $0 million at both period ends; Net loans, $12.7 billion and $12.5 billion; Derivative assets, $0 million at both period ends; Equity securities, $61 million and $306 million; Other assets, $210 million and $342 million; and Total assets, $13.1 billion and $13.6 billion, respectively.

Guarantees, Offsetting of Resal

Guarantees, Offsetting of Resale and Repurchase Agreements and Securities Borrowing and Lending (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Financial Instruments Owned and Pledged as Collateral [Line Items]
Securities owned and pledged as collateral related to repurchase agreements not available to be repledged, Fair Value	$ 4,300	$ 5,200
Net amounts in consolidated balance sheet	100,543	97,947
Collateral received, fair value	124,100	130,800
Collateral received with the right to sell or repledge	124,100	130,800
Collateral sold or repledged	60,400	66,300
Collateral pledged, fair value	108,700	113,600
Resale and securities borrowing agreements
Gross amounts recognized	114,914	121,135
Gross amounts offset in consolidated balance sheet	(14,371)	(23,188)
Net amounts in consolidated balance sheet	100,543	97,947
Collateral not recognized in consolidated balance sheet	(99,699)	(96,829)
Net amount	844	1,118
Repurchase and securities lending agreements
Gross amounts recognized	106,253	111,488
Gross amounts offset in consolidated balance sheet	(14,371)	(23,188)
Net amounts in consolidated balance sheet	91,882	88,300
Collateral pledged but not netted in consolidated balance sheet	(91,580)	(87,918)
Net amount	302	382
Fed Funds Sold, Securities Purchased under Resale Agreements and Other Short-Term Investments [Member]
Financial Instruments Owned and Pledged as Collateral [Line Items]
Net amounts in consolidated balance sheet	83,400	78,900
Resale and securities borrowing agreements
Net amounts in consolidated balance sheet	83,400	78,900
Loans [Member]
Financial Instruments Owned and Pledged as Collateral [Line Items]
Net amounts in consolidated balance sheet	17,100	19,000
Resale and securities borrowing agreements
Net amounts in consolidated balance sheet	$ 17,100	$ 19,000

Guarantees, Pledged Assets an_4

Guarantees, Pledged Assets and Collateral Guarantees, Collateral Type and Contractual Maturities of Repurchase Agreements and Securities Lending Agreements (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Secured Borrowings, Gross Including Not Subject to Master Netting Arrangement [Abstract]
Repurchase Agreements	$ 95,634	$ 99,753
Securities Lending	10,619	11,735
Total Repurchases and Securities Lending	106,253	111,488
Securities of U.S. Treasury and federal agencies [Member]
Secured Borrowings, Gross Including Not Subject to Master Netting Arrangement [Abstract]
Repurchase Agreements	35,758	40,507
Securities Lending	192	186
Securities of U.S. states and political subdivisions [Member]
Secured Borrowings, Gross Including Not Subject to Master Netting Arrangement [Abstract]
Repurchase Agreements	68	92
Federal agencies [Member]
Secured Borrowings, Gross Including Not Subject to Master Netting Arrangement [Abstract]
Repurchase Agreements	45,153	45,336
Non-Agency Mortgage-backed Securities [Member]
Secured Borrowings, Gross Including Not Subject to Master Netting Arrangement [Abstract]
Repurchase Agreements	1,441	1,324
Corporate debt securities [Member]
Secured Borrowings, Gross Including Not Subject to Master Netting Arrangement [Abstract]
Repurchase Agreements	8,869	8,020
Securities Lending	418	619
Asset-backed Securities [Member]
Secured Borrowings, Gross Including Not Subject to Master Netting Arrangement [Abstract]
Repurchase Agreements	2,128	2,034
Equity Securities
Secured Borrowings, Gross Including Not Subject to Master Netting Arrangement [Abstract]
Repurchase Agreements	793	838
Securities Lending	9,947	10,930
Other [Member]
Secured Borrowings, Gross Including Not Subject to Master Netting Arrangement [Abstract]
Repurchase Agreements	1,424	1,602
Securities Lending	62	0
Overnight/Continuous [Member]
Secured Borrowings, Gross Including Not Subject to Master Netting Arrangement [Abstract]
Repurchase Agreements	82,130	83,780
Securities Lending	10,281	9,634
Total Repurchases and Securities Lending	92,411	93,414
Up to 30 days [Member]
Secured Borrowings, Gross Including Not Subject to Master Netting Arrangement [Abstract]
Repurchase Agreements	5,879	7,922
Securities Lending	38	584
Total Repurchases and Securities Lending	5,917	8,506
30-90 days [Member]
Secured Borrowings, Gross Including Not Subject to Master Netting Arrangement [Abstract]
Repurchase Agreements	2,954	3,286
Securities Lending	300	1,363
Total Repurchases and Securities Lending	3,254	4,649
Over 90 days [Member]
Secured Borrowings, Gross Including Not Subject to Master Netting Arrangement [Abstract]
Repurchase Agreements	4,671	4,765
Securities Lending	0	154
Total Repurchases and Securities Lending	$ 4,671	$ 4,919

Guarantees, Pledged Assets an_5

Guarantees, Pledged Assets and Collateral Guarantees, Pledged Assets and Collateral, and Other Commitments Guarantees, Other Commitments (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Other Commitments [Line Items]
Resale Agreements, Funded Amounts Outstanding	$ 0	$ 0
Resale Agreements, Unfunded Commitments	$ 5,100	2,800
Description of Guarantees Given by Registrant	If issued, the Parent will fully and unconditionally guarantee securities of its 100% owned finance subsidiary, Wells Fargo Finance LLC
Purchase Commitment [Member] | Debt securities [Member]
Other Commitments [Line Items]
Other Commitment	$ 1,400	194
Purchase Commitment [Member] | Equity Securities
Other Commitments [Line Items]
Other Commitment	$ 2,400	$ 2,200

Legal Actions (Details)

Legal Actions (Details) $ in Millions	Jul. 13, 2012USD ($)	Dec. 31, 2016USD ($)	Apr. 20, 2017USD ($)	Oct. 24, 2018USD ($)	Oct. 01, 2018USD ($)	Sep. 30, 2018USD ($)legal_action	Jul. 31, 2017	Nov. 17, 2016legal_action	Dec. 31, 2015legal_action
Legal Actions (Textual) [Abstract]
RMBS trusts at issue in the State Court Action							11
ATM Access Fee Litigation [Member]
Legal Actions (Textual) [Abstract]
Loss Contingency, Pending Claims, Number | legal_action								3
Automobile Lending Practices [Member]
Legal Actions (Textual) [Abstract]
Loss Contingency, Pending Claims, Number | legal_action						1
Interchange Litigation [Member]
Loss Contingencies [Line Items]
Litigation Settlement, Percentage Of Default Interchange Distributed To Class Merchants	0.10%
Legal Actions (Textual) [Abstract]
Loss Contingency, Estimate of Possible Loss	$ 6,600
Litigation Settlement, Default Interchange Distributed To Class Merchants, Distribution Period	8 months
Litigation Settlement, Expense		$ 6,200
Litigation Settlement, Funds Remaining from 2012		5,300
Litigation Settlement, Additional Funding		900
Litigation Settlement, Additional Funding Allocated to WFC		$ 94.5
Mortgage Interest Rate Lock [Member]
Legal Actions (Textual) [Abstract]
Loss Contingency, Pending Claims, Number | legal_action						2
Civil Money Penalty						$ 1,000
Mortgage Related Regulatory Investigations [Member]
Legal Actions (Textual) [Abstract]
Settlement Liabilities, Current						2,090
RMBS Trustee Litigation [Member]
Legal Actions (Textual) [Abstract]
Loss Contingency, Pending Claims, Number | legal_action									4
Sales Practice Matters [Member]
Legal Actions (Textual) [Abstract]
Amounts To Be Paid In Connection With Legal Or Regulatory Matters			$ 142
Unauthorized accounts identified			3,500,000
Sales Practice Matters [Member] | All Class Members [Member]
Legal Actions (Textual) [Abstract]
Amounts To Be Paid In Connection With Legal Or Regulatory Matters			$ 25
Payments for Legal Settlements			$ 480
Liability for Contingent Litigation Losses [Member]
Legal Actions (Textual) [Abstract]
Range of possible loss, portion not accrued						$ 2,200
Subsequent Event [Member] | Mortgage Bankruptcy Loan Modification Litigation [Member]
Legal Actions (Textual) [Abstract]
Loss Contingency, Estimate of Possible Loss				$ 13.5
NEW YORK | Subsequent Event [Member] | Sales Practice Matters [Member]
Legal Actions (Textual) [Abstract]
Loss Contingency, Estimate of Possible Loss					$ 65

Derivatives, Notional or Contra

Derivatives, Notional or Contractual Amounts and Fair Values of Derivatives (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Fair value derivative assets	$ 34,779	$ 36,355
Fair value derivative assets, netting	(22,968)	(24,127)
Net amounts in consolidated balance sheet, assets	11,811	12,228
Fair value derivative liabilities	32,670	34,298
Fair value derivative liabilities, netting	(24,084)	(25,502)
Net amounts in consolidated balance sheet, liabilities	8,586	8,796
Interest rate contract [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Fair value derivative assets, netting	(10,905)	(11,929)
Net amounts in consolidated balance sheet, assets	5,158	5,701
Fair value derivative liabilities, netting	(11,982)	(13,226)
Net amounts in consolidated balance sheet, liabilities	3,561	2,246
Commodity contract [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Fair value derivative assets, netting	(1,165)	(966)
Net amounts in consolidated balance sheet, assets	3,040	1,388
Fair value derivative liabilities, netting	(823)	(648)
Net amounts in consolidated balance sheet, liabilities	893	687
Equity contract [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Fair value derivative assets, netting	(5,646)	(4,233)
Net amounts in consolidated balance sheet, assets	2,177	2,774
Fair value derivative liabilities, netting	(5,949)	(4,041)
Net amounts in consolidated balance sheet, liabilities	2,775	4,460
Foreign exchange contract [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Fair value derivative assets, netting	(5,036)	(6,656)
Net amounts in consolidated balance sheet, assets	1,398	2,317
Fair value derivative liabilities, netting	(5,023)	(7,189)
Net amounts in consolidated balance sheet, liabilities	1,346	1,379
Credit Contracts Protection Sold [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Fair value derivative assets, netting	(92)	(145)
Net amounts in consolidated balance sheet, assets	2	2
Fair value derivative liabilities, netting	(140)	(204)
Net amounts in consolidated balance sheet, liabilities	1	10
Credit Contracts Protection Purchased [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Fair value derivative assets, netting	(124)	(198)
Net amounts in consolidated balance sheet, assets	36	46
Fair value derivative liabilities, netting	(167)	(194)
Net amounts in consolidated balance sheet, liabilities	10	14
Designated as Hedging Instrument [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Fair value derivative assets	3,208	3,974
Fair value derivative liabilities	1,871	2,229
Designated as Hedging Instrument [Member] | Interest rate contract [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Notional or contractual amount	184,332	209,677
Fair value derivative assets	2,471	2,492
Fair value derivative liabilities	650	1,092
Designated as Hedging Instrument [Member] | Foreign exchange contract [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Notional or contractual amount	35,136	34,135
Fair value derivative assets	737	1,482
Fair value derivative liabilities	1,221	1,137
Not Designated as Hedging Instrument [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Fair value derivative assets	31,571	32,381
Fair value derivative liabilities	30,799	32,069
Not Designated as Hedging Instrument [Member] | Economic hedges [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Fair value derivative assets	1,236	990
Fair value derivative liabilities	701	648
Not Designated as Hedging Instrument [Member] | Customer accommodation trading, and other derivatives [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Fair value derivative assets	30,335	31,391
Fair value derivative liabilities	30,098	31,421
Not Designated as Hedging Instrument [Member] | Interest rate contract [Member] | Economic hedges [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Notional or contractual amount	181,607	220,558
Fair value derivative assets	166	159
Fair value derivative liabilities	375	201
Not Designated as Hedging Instrument [Member] | Interest rate contract [Member] | Customer accommodation trading, and other derivatives [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Notional or contractual amount	8,156,678	6,434,673
Fair value derivative assets	13,426	14,979
Fair value derivative liabilities	14,518	14,179
Not Designated as Hedging Instrument [Member] | Commodity contract [Member] | Customer accommodation trading, and other derivatives [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Notional or contractual amount	72,559	62,530
Fair value derivative assets	4,205	2,354
Fair value derivative liabilities	1,716	1,335
Not Designated as Hedging Instrument [Member] | Equity contract [Member] | Economic hedges [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Notional or contractual amount	15,764	12,315
Fair value derivative assets	929	716
Fair value derivative liabilities	210	138
Not Designated as Hedging Instrument [Member] | Equity contract [Member] | Customer accommodation trading, and other derivatives [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Notional or contractual amount	229,905	213,750
Fair value derivative assets	6,894	6,291
Fair value derivative liabilities	8,514	8,363
Not Designated as Hedging Instrument [Member] | Foreign exchange contract [Member] | Economic hedges [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Notional or contractual amount	14,288	15,976
Fair value derivative assets	115	78
Fair value derivative liabilities	116	309
Not Designated as Hedging Instrument [Member] | Foreign exchange contract [Member] | Customer accommodation trading, and other derivatives [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Notional or contractual amount	333,715	362,896
Fair value derivative assets	5,582	7,413
Fair value derivative liabilities	5,032	7,122
Not Designated as Hedging Instrument [Member] | Credit Contracts Protection Sold [Member] | Customer accommodation trading, and other derivatives [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Notional or contractual amount	9,185	9,021
Fair value derivative assets	94	147
Fair value derivative liabilities	141	214
Not Designated as Hedging Instrument [Member] | Credit Contracts Protection Purchased [Member] | Economic hedges [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Notional or contractual amount	101	111
Fair value derivative assets	26	37
Fair value derivative liabilities	0	0
Not Designated as Hedging Instrument [Member] | Credit Contracts Protection Purchased [Member] | Customer accommodation trading, and other derivatives [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Notional or contractual amount	17,973	17,406
Fair value derivative assets	134	207
Fair value derivative liabilities	177	208
Basis swap [Member] | Designated as Hedging Instrument [Member] | Interest rate contract [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Notional or contractual amount	0	500
Basis swap [Member] | Designated as Hedging Instrument [Member] | Foreign exchange contract [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Notional or contractual amount	$ 11,300	$ 13,500

Derivatives, Gross Fair Value o

Derivatives, Gross Fair Value of Derivative Assets and Liabilities (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Derivative Assets
Gross amounts recognized	$ 34,779	$ 36,355
Gross amounts offset in consolidated balance sheet	(22,968)	(24,127)
Net amounts in consolidated balance sheet, assets	11,811	12,228
Gross amounts not offset in consolidated balance sheet (Disclosure-only netting)	(635)	(773)
Net amounts	11,176	11,455
Derivative Liabilities
Gross amounts recognized	32,670	34,298
Gross amounts offset in consolidated balance sheet, liabilities	(24,084)	(25,502)
Net amounts in consolidated balance sheet, liabilities	8,586	8,796
Gross amounts not offset in consolidated balance sheet (Disclosure-only netting)	(603)	(1,692)
Net amounts	7,983	7,104
Derivatives (Textual) [Abstract]
Derivative assets subject to enforceable master netting arrangements	31,400	30,000
Derivative liabilities subject to enforceable master netting arrangements	29,200	29,900
Derivative assets not subject to enforceable master netting arrangements	3,400	6,400
Derivative liabilities not subject to enforceable master netting arrangements	3,500	4,400
Valuation adjustments for derivative assets	243	245
Valuation adjustments for derivative liabilities	108	95
Cash collateral netted against derivative assets	2,900	2,700
Cash collateral netted against derivative liabilities	4,100	4,200
Interest rate contract [Member]
Derivative Assets
Gross amounts recognized	16,063	17,630
Gross amounts offset in consolidated balance sheet	(10,905)	(11,929)
Net amounts in consolidated balance sheet, assets	5,158	5,701
Gross amounts not offset in consolidated balance sheet (Disclosure-only netting)	(104)	(145)
Net amounts	$ 5,054	$ 5,556
Percent exchanged in the over the counter market	98.00%	99.00%
Derivative Liabilities
Gross amounts recognized	$ 15,543	$ 15,472
Gross amounts offset in consolidated balance sheet, liabilities	(11,982)	(13,226)
Net amounts in consolidated balance sheet, liabilities	3,561	2,246
Gross amounts not offset in consolidated balance sheet (Disclosure-only netting)	(306)	(1,078)
Net amounts	$ 3,255	$ 1,168
Percent exchanged in over-the-counter market	98.00%	99.00%
Commodity contract [Member]
Derivative Assets
Gross amounts recognized	$ 4,205	$ 2,354
Gross amounts offset in consolidated balance sheet	(1,165)	(966)
Net amounts in consolidated balance sheet, assets	3,040	1,388
Gross amounts not offset in consolidated balance sheet (Disclosure-only netting)	(2)	(4)
Net amounts	$ 3,038	$ 1,384
Percent exchanged in the over the counter market	92.00%	88.00%
Derivative Liabilities
Gross amounts recognized	$ 1,716	$ 1,335
Gross amounts offset in consolidated balance sheet, liabilities	(823)	(648)
Net amounts in consolidated balance sheet, liabilities	893	687
Gross amounts not offset in consolidated balance sheet (Disclosure-only netting)	0	(1)
Net amounts	$ 893	$ 686
Percent exchanged in over-the-counter market	55.00%	76.00%
Equity contract [Member]
Derivative Assets
Gross amounts recognized	$ 7,823	$ 7,007
Gross amounts offset in consolidated balance sheet	(5,646)	(4,233)
Net amounts in consolidated balance sheet, assets	2,177	2,774
Gross amounts not offset in consolidated balance sheet (Disclosure-only netting)	(494)	(596)
Net amounts	$ 1,683	$ 2,178
Percent exchanged in the over the counter market	74.00%	76.00%
Derivative Liabilities
Gross amounts recognized	$ 8,724	$ 8,501
Gross amounts offset in consolidated balance sheet, liabilities	(5,949)	(4,041)
Net amounts in consolidated balance sheet, liabilities	2,775	4,460
Gross amounts not offset in consolidated balance sheet (Disclosure-only netting)	(235)	(400)
Net amounts	$ 2,540	$ 4,060
Percent exchanged in over-the-counter market	84.00%	85.00%
Foreign exchange contract [Member]
Derivative Assets
Gross amounts recognized	$ 6,434	$ 8,973
Gross amounts offset in consolidated balance sheet	(5,036)	(6,656)
Net amounts in consolidated balance sheet, assets	1,398	2,317
Gross amounts not offset in consolidated balance sheet (Disclosure-only netting)	(33)	(25)
Net amounts	$ 1,365	$ 2,292
Percent exchanged in the over the counter market	100.00%	100.00%
Derivative Liabilities
Gross amounts recognized	$ 6,369	$ 8,568
Gross amounts offset in consolidated balance sheet, liabilities	(5,023)	(7,189)
Net amounts in consolidated balance sheet, liabilities	1,346	1,379
Gross amounts not offset in consolidated balance sheet (Disclosure-only netting)	(61)	(204)
Net amounts	$ 1,285	$ 1,175
Percent exchanged in over-the-counter market	100.00%	100.00%
Credit Contracts Protection Sold [Member]
Derivative Assets
Gross amounts recognized	$ 94	$ 147
Gross amounts offset in consolidated balance sheet	(92)	(145)
Net amounts in consolidated balance sheet, assets	2	2
Gross amounts not offset in consolidated balance sheet (Disclosure-only netting)	0	0
Net amounts	$ 2	$ 2
Percent exchanged in the over the counter market	13.00%	10.00%
Derivative Liabilities
Gross amounts recognized	$ 141	$ 214
Gross amounts offset in consolidated balance sheet, liabilities	(140)	(204)
Net amounts in consolidated balance sheet, liabilities	1	10
Gross amounts not offset in consolidated balance sheet (Disclosure-only netting)	(1)	(9)
Net amounts	$ 0	$ 1
Percent exchanged in over-the-counter market	84.00%	85.00%
Credit Contracts Protection Purchased [Member]
Derivative Assets
Gross amounts recognized	$ 160	$ 244
Gross amounts offset in consolidated balance sheet	(124)	(198)
Net amounts in consolidated balance sheet, assets	36	46
Gross amounts not offset in consolidated balance sheet (Disclosure-only netting)	(2)	(3)
Net amounts	$ 34	$ 43
Percent exchanged in the over the counter market	90.00%	89.00%
Derivative Liabilities
Gross amounts recognized	$ 177	$ 208
Gross amounts offset in consolidated balance sheet, liabilities	(167)	(194)
Net amounts in consolidated balance sheet, liabilities	10	14
Gross amounts not offset in consolidated balance sheet (Disclosure-only netting)	0	0
Net amounts	$ 10	$ 14
Percent exchanged in over-the-counter market	9.00%	9.00%

Derivatives, Derivatives in Fai

Derivatives, Derivatives in Fair Value and Cash Flow Hedging Relationships (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017		Sep. 30, 2018	Sep. 30, 2017
Line Items Presented in the Consolidated Statement of Income [Abstract]
Debt securities	$ 3,595	$ 3,253	[1],[2]	$ 10,603	$ 9,652	[1],[2]
Loans	11,116	10,522		32,607	31,021
Mortgage loans held for sale (2)	210	217	[2]	587	590	[2]
Deposits (2)	(1,499)	(869)	[2]	(3,857)	(2,082)	[2]
Long-term debt (2)	(1,667)	(1,391)	[2]	(4,901)	(3,813)	[2]
Other	633	199		1,720	1,045
Total amounts of line items presented in the consolidated statement of income	12,388	11,931		36,759	36,413
Gains (losses) on cash flow hedging relationships
Realized gains (losses) (pre tax) reclassified from cumulative OCI into net income	(79)	105	[3]	(216)	460	[3]
Derivatives (Textual) [Abstract]
Deferred net gains on derivatives in other comprehensive income				(309)
Time value component recognized as net interest income (expense) on forward derivatives excluded from the assessment of hedge effectiveness	(5)	(1)		$ (3)	(2)
Maximum length of time hedged in cash flow hedge				8 years
Fair Value Hedging [Member]
Gains (losses) on fair value hedging relationships
Net income (expense) recognized on fair value hedges	(90)	138		$ (402)	796
Cash Flow Hedging [Member]
Gains (losses) on cash flow hedging relationships
Realized gains (losses) (pre tax) reclassified from cumulative OCI into net income	(79)	105		(216)	460
Interest rate contract [Member] | Fair Value Hedging [Member]
Gains (losses) on fair value hedging relationships
Amounts related to interest settlements on derivatives	(6)	160		95	702
Recognized on derivatives	(781)	(167)		(2,865)	(473)
Recognized on hedged items	740	157		2,690	425
Interest rate contract [Member] | Cash Flow Hedging [Member]
Gains (losses) on cash flow hedging relationships
Realized gains (losses) (pre tax) reclassified from cumulative OCI into net income	(78)	105		(215)	460
Net income (expense) recognized on cash flow hedges	(78)	105		(216)	460
Foreign exchange contract [Member] | Fair Value Hedging [Member]
Gains (losses) on fair value hedging relationships
Amounts related to interest settlements on derivatives	(110)	(56)		(277)	(132)
Recognized on derivatives	(195)	819		(1,013)	2,551
Recognized on hedged items	262	(775)		968	(2,277)
Foreign exchange contract [Member] | Cash Flow Hedging [Member]
Gains (losses) on cash flow hedging relationships
Realized gains (losses) (pre tax) reclassified from cumulative OCI into net income	(1)	0		(1)	0
Debt securities [Member] | Fair Value Hedging [Member]
Gains (losses) on fair value hedging relationships
Net income (expense) recognized on fair value hedges	(51)	(117)		(170)	(395)
Debt securities [Member] | Interest rate contract [Member] | Fair Value Hedging [Member]
Gains (losses) on fair value hedging relationships
Amounts related to interest settlements on derivatives	(34)	(110)		(158)	(363)
Recognized on derivatives	386	(6)		1,692	(167)
Recognized on hedged items	(410)	(5)		(1,730)	121
Debt securities [Member] | Interest rate contract [Member] | Cash Flow Hedging [Member]
Gains (losses) on cash flow hedging relationships
Realized gains (losses) (pre tax) reclassified from cumulative OCI into net income	0	0		0	0
Net income (expense) recognized on cash flow hedges	0	0		0	0
Debt securities [Member] | Foreign exchange contract [Member] | Fair Value Hedging [Member]
Gains (losses) on fair value hedging relationships
Amounts related to interest settlements on derivatives	8	4		23	10
Recognized on derivatives	2	0		8	11
Recognized on hedged items	(3)	0		(5)	(7)
Debt securities [Member] | Foreign exchange contract [Member] | Cash Flow Hedging [Member]
Gains (losses) on cash flow hedging relationships
Realized gains (losses) (pre tax) reclassified from cumulative OCI into net income	0	0		0	0
Loans [Member] | Fair Value Hedging [Member]
Gains (losses) on fair value hedging relationships
Net income (expense) recognized on fair value hedges	0	0		0	(1)
Loans [Member] | Interest rate contract [Member] | Fair Value Hedging [Member]
Gains (losses) on fair value hedging relationships
Amounts related to interest settlements on derivatives	0	0		0	(1)
Recognized on derivatives	0	0		1	0
Recognized on hedged items	0	0		(1)	0
Loans [Member] | Interest rate contract [Member] | Cash Flow Hedging [Member]
Gains (losses) on cash flow hedging relationships
Realized gains (losses) (pre tax) reclassified from cumulative OCI into net income	(78)	107		(215)	468
Net income (expense) recognized on cash flow hedges	(78)	107		(215)	468
Loans [Member] | Foreign exchange contract [Member] | Fair Value Hedging [Member]
Gains (losses) on fair value hedging relationships
Amounts related to interest settlements on derivatives	0	0		0	0
Recognized on derivatives	0	0		0	0
Recognized on hedged items	0	0		0	0
Loans [Member] | Foreign exchange contract [Member] | Cash Flow Hedging [Member]
Gains (losses) on cash flow hedging relationships
Realized gains (losses) (pre tax) reclassified from cumulative OCI into net income	0	0		0	0
Mortgage loans held for sale [Member] | Fair Value Hedging [Member]
Gains (losses) on fair value hedging relationships
Net income (expense) recognized on fair value hedges	(3)	(3)		(9)	(11)
Mortgage loans held for sale [Member] | Interest rate contract [Member] | Fair Value Hedging [Member]
Gains (losses) on fair value hedging relationships
Amounts related to interest settlements on derivatives	(1)	(1)		(3)	(4)
Recognized on derivatives	10	0		21	(11)
Recognized on hedged items	(12)	(2)		(27)	4
Mortgage loans held for sale [Member] | Interest rate contract [Member] | Cash Flow Hedging [Member]
Gains (losses) on cash flow hedging relationships
Realized gains (losses) (pre tax) reclassified from cumulative OCI into net income	0	0		0	0
Net income (expense) recognized on cash flow hedges	0	0		0	0
Mortgage loans held for sale [Member] | Foreign exchange contract [Member] | Fair Value Hedging [Member]
Gains (losses) on fair value hedging relationships
Amounts related to interest settlements on derivatives	0	0		0	0
Recognized on derivatives	0	0		0	0
Recognized on hedged items	0	0		0	0
Mortgage loans held for sale [Member] | Foreign exchange contract [Member] | Cash Flow Hedging [Member]
Gains (losses) on cash flow hedging relationships
Realized gains (losses) (pre tax) reclassified from cumulative OCI into net income	0	0		0	0
Deposits [Member] | Fair Value Hedging [Member]
Gains (losses) on fair value hedging relationships
Net income (expense) recognized on fair value hedges	(7)	26		(50)	37
Deposits [Member] | Interest rate contract [Member] | Fair Value Hedging [Member]
Gains (losses) on fair value hedging relationships
Amounts related to interest settlements on derivatives	(10)	25		(35)	29
Recognized on derivatives	(58)	1		(248)	30
Recognized on hedged items	61	0		233	(22)
Deposits [Member] | Interest rate contract [Member] | Cash Flow Hedging [Member]
Gains (losses) on cash flow hedging relationships
Realized gains (losses) (pre tax) reclassified from cumulative OCI into net income	0	0		0	0
Net income (expense) recognized on cash flow hedges	0	0		0	0
Deposits [Member] | Foreign exchange contract [Member] | Fair Value Hedging [Member]
Gains (losses) on fair value hedging relationships
Amounts related to interest settlements on derivatives	0	0		0	0
Recognized on derivatives	0	0		0	0
Recognized on hedged items	0	0		0	0
Deposits [Member] | Foreign exchange contract [Member] | Cash Flow Hedging [Member]
Gains (losses) on cash flow hedging relationships
Realized gains (losses) (pre tax) reclassified from cumulative OCI into net income	0	0		0	0
Long-term debt [Member] | Fair Value Hedging [Member]
Gains (losses) on fair value hedging relationships
Net income (expense) recognized on fair value hedges	(29)	171		(104)	924
Long-term debt [Member] | Interest rate contract [Member] | Fair Value Hedging [Member]
Gains (losses) on fair value hedging relationships
Amounts related to interest settlements on derivatives	39	246		291	1,041
Recognized on derivatives	(1,119)	(162)		(4,331)	(325)
Recognized on hedged items	1,101	164		4,215	322
Long-term debt [Member] | Interest rate contract [Member] | Cash Flow Hedging [Member]
Gains (losses) on cash flow hedging relationships
Realized gains (losses) (pre tax) reclassified from cumulative OCI into net income	0	(2)		0	(8)
Net income (expense) recognized on cash flow hedges	(1)	(2)		(1)	(8)
Long-term debt [Member] | Foreign exchange contract [Member] | Fair Value Hedging [Member]
Gains (losses) on fair value hedging relationships
Amounts related to interest settlements on derivatives	(118)	(60)		(300)	(142)
Recognized on derivatives	(58)	(32)		(132)	(187)
Recognized on hedged items	126	15		153	215
Long-term debt [Member] | Foreign exchange contract [Member] | Cash Flow Hedging [Member]
Gains (losses) on cash flow hedging relationships
Realized gains (losses) (pre tax) reclassified from cumulative OCI into net income	(1)	0		(1)	0
Other noninterest income [Member] | Fair Value Hedging [Member]
Gains (losses) on fair value hedging relationships
Net income (expense) recognized on fair value hedges	0	61		(69)	242
Other noninterest income [Member] | Interest rate contract [Member] | Fair Value Hedging [Member]
Gains (losses) on fair value hedging relationships
Amounts related to interest settlements on derivatives	0	0		0	0
Recognized on derivatives	0	0		0	0
Recognized on hedged items	0	0		0	0
Other noninterest income [Member] | Interest rate contract [Member] | Cash Flow Hedging [Member]
Gains (losses) on cash flow hedging relationships
Realized gains (losses) (pre tax) reclassified from cumulative OCI into net income	0	0		0	0
Net income (expense) recognized on cash flow hedges		0		0	0
Other noninterest income [Member] | Foreign exchange contract [Member] | Fair Value Hedging [Member]
Gains (losses) on fair value hedging relationships
Amounts related to interest settlements on derivatives	0	0		0	0
Recognized on derivatives	(139)	851		(889)	2,727
Recognized on hedged items	139	(790)		820	(2,485)
Other noninterest income [Member] | Foreign exchange contract [Member] | Cash Flow Hedging [Member]
Gains (losses) on cash flow hedging relationships
Realized gains (losses) (pre tax) reclassified from cumulative OCI into net income	0	0		0	0
Off market premium amortization [Member]
Gains (losses) on fair value hedging relationships
Amounts related to interest settlements on derivatives	$ 11	$ 12		$ 35	$ 22
[1]	(1)Financial information for the prior periods has been revised to reflect the impact of the adoption in first quarter 2018 of Accounting Standards Update (ASU) 2016-01 – Financial Instruments – Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities. See Note 1 (Summary of Significant Accounting Policies) for more information.
[2]	(2)Financial information for the prior period has been revised to reflect the impact of the adoption of ASU 2017-12 – Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities, effective January 1, 2017.
[3]	(1)Financial information for the prior period has been revised to reflect the impact of the adoption of ASU 2017-12 – Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities, effective January 1, 2017.

Derivatives, Fair Value Hedging

Derivatives, Fair Value Hedging Basis Adjustment (Details) - Fair Value Hedging [Member] - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Hedged Items Currently Designated [Member] | Debt securities [Member]
Fair Value Hedging Basis Adjustment [Abstract]
Carrying Amount of Assets	$ 29,736	$ 32,498
Hedged Asset, Fair Value Hedge, Cumulative Basis Adjustments	(1,008)	870
Hedged Items Currently Designated [Member] | Loans [Member]
Fair Value Hedging Basis Adjustment [Abstract]
Carrying Amount of Assets	0	140
Hedged Asset, Fair Value Hedge, Cumulative Basis Adjustments	0	(1)
Hedged Items Currently Designated [Member] | Mortgage loans held for sale [Member]
Fair Value Hedging Basis Adjustment [Abstract]
Carrying Amount of Assets	681	465
Hedged Asset, Fair Value Hedge, Cumulative Basis Adjustments	(6)	(1)
Hedged Items Currently Designated [Member] | Deposits [Member]
Fair Value Hedging Basis Adjustment [Abstract]
Carrying Amount of (Liabilities)	(45,282)	(23,679)
Hedged Liability, Fair Value Hedge, Cumulative Basis Adjustments	383	158
Hedged Items Currently Designated [Member] | Long-term debt [Member]
Fair Value Hedging Basis Adjustment [Abstract]
Carrying Amount of (Liabilities)	(127,072)	(128,950)
Hedged Liability, Fair Value Hedge, Cumulative Basis Adjustments	2,223	(2,154)
Hedged Items No Longer Designated [Member] | Debt securities [Member]
Fair Value Hedging Basis Adjustment [Abstract]
Carrying Amount of Assets	4,947	5,221
Hedged Asset, Discontinued Fair Value Hedge, Cumulative Basis Adjustments	261	343
Hedged Items No Longer Designated [Member] | Loans [Member]
Fair Value Hedging Basis Adjustment [Abstract]
Carrying Amount of Assets	0	0
Hedged Asset, Discontinued Fair Value Hedge, Cumulative Basis Adjustments	0	0
Hedged Items No Longer Designated [Member] | Mortgage loans held for sale [Member]
Fair Value Hedging Basis Adjustment [Abstract]
Carrying Amount of Assets	0	0
Hedged Asset, Discontinued Fair Value Hedge, Cumulative Basis Adjustments	0	0
Hedged Items No Longer Designated [Member] | Deposits [Member]
Fair Value Hedging Basis Adjustment [Abstract]
Carrying Amount of (Liabilities)	0	0
Hedged Liability, Discontinued Fair Value Hedge, Cumulative Basis Adjustments	0	0
Hedged Items No Longer Designated [Member] | Long-term debt [Member]
Fair Value Hedging Basis Adjustment [Abstract]
Carrying Amount of (Liabilities)	(808)	(1,953)
Hedged Liability, Discontinued Fair Value Hedge, Cumulative Basis Adjustments	10	16
Foreign exchange contract [Member] | Hedged Items Currently Designated [Member] | Debt securities [Member]
Fair Value Hedging Basis Adjustment [Abstract]
Carrying Amount of Assets	1,300	1,500
Foreign exchange contract [Member] | Hedged Items Currently Designated [Member] | Long-term debt [Member]
Fair Value Hedging Basis Adjustment [Abstract]
Carrying Amount of (Liabilities)	(6,400)	(7,700)
Re-designated as hedging instrument [Member] | Debt securities [Member]
Fair Value Hedging Basis Adjustment [Abstract]
Hedged Asset, Fair Value Hedge, Cumulative Basis Adjustments	1,500	2,100
Re-designated as hedging instrument [Member] | Long-term debt [Member]
Fair Value Hedging Basis Adjustment [Abstract]
Hedged Liability, Fair Value Hedge, Cumulative Basis Adjustments	$ 49	$ 297

Derivatives, Derivatives Not De

Derivatives, Derivatives Not Designated as Hedging Instruments (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Derivatives (Textual) [Abstract]
Gains (losses) on derivatives used to hedge residential mortgage servicing rights	$ (501)	$ 240	$ (2,040)	$ 599
Fair Value of Net Asset (Liability) From Economic Hedges Related To Mortgage Servicing Activities	(185)		(185)		$ 89
Aggregate fair value of derivative loan commitments net asset (liability)	(7)		(7)		$ 17
Not Designated as Hedging Instrument [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	(1,749)	(1,163)	(1,204)	(2,974)
Not Designated as Hedging Instrument [Member] | Mortgage banking [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	(401)	290	(1,486)	1,079
Not Designated as Hedging Instrument [Member] | Net gain (loss) from equity securities [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	(719)	(490)	(1,317)	(1,164)
Not Designated as Hedging Instrument [Member] | Net gain (loss) from trading activities [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	(605)	(647)	1,557	(2,010)
Not Designated as Hedging Instrument [Member] | Other [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	(24)	(316)	42	(879)
Not Designated as Hedging Instrument [Member] | Economic hedges [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	(964)	(676)	(2,010)	(1,585)
Derivatives (Textual) [Abstract]
Derivative Instruments Not Designated as Hedging Instruments, Gain	10		46
Derivative Instruments Not Designated as Hedging Instruments, Loss		(18)		(64)
Not Designated as Hedging Instrument [Member] | Economic hedges [Member] | Interest contracts [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	(335)	119	(1,109)	416
Not Designated as Hedging Instrument [Member] | Economic hedges [Member] | Equity contract [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	(711)	(489)	(1,304)	(1,175)
Not Designated as Hedging Instrument [Member] | Economic hedges [Member] | Foreign exchange contract [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	78	(300)	405	(834)
Not Designated as Hedging Instrument [Member] | Economic hedges [Member] | Credit contract [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	4	(6)	(2)	8
Not Designated as Hedging Instrument [Member] | Economic hedges [Member] | Mortgage banking [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	(334)	138	(1,114)	480
Not Designated as Hedging Instrument [Member] | Economic hedges [Member] | Mortgage banking [Member] | Interest contracts [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	(334)	138	(1,114)	480
Not Designated as Hedging Instrument [Member] | Economic hedges [Member] | Mortgage banking [Member] | Equity contract [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	0	0	0	0
Not Designated as Hedging Instrument [Member] | Economic hedges [Member] | Mortgage banking [Member] | Foreign exchange contract [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	0	0	0	0
Not Designated as Hedging Instrument [Member] | Economic hedges [Member] | Mortgage banking [Member] | Credit contract [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	0	0	0	0
Not Designated as Hedging Instrument [Member] | Economic hedges [Member] | Net gain (loss) from equity securities [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	(719)	(490)	(1,317)	(1,164)
Not Designated as Hedging Instrument [Member] | Economic hedges [Member] | Net gain (loss) from equity securities [Member] | Interest contracts [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	0	0	0	0
Not Designated as Hedging Instrument [Member] | Economic hedges [Member] | Net gain (loss) from equity securities [Member] | Equity contract [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	(719)	(490)	(1,317)	(1,164)
Not Designated as Hedging Instrument [Member] | Economic hedges [Member] | Net gain (loss) from equity securities [Member] | Foreign exchange contract [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	0	0	0	0
Not Designated as Hedging Instrument [Member] | Economic hedges [Member] | Net gain (loss) from equity securities [Member] | Credit contract [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	0	0	0	0
Not Designated as Hedging Instrument [Member] | Economic hedges [Member] | Net gain (loss) from trading activities [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	0	0	0	0
Not Designated as Hedging Instrument [Member] | Economic hedges [Member] | Net gain (loss) from trading activities [Member] | Interest contracts [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	0	0	0	0
Not Designated as Hedging Instrument [Member] | Economic hedges [Member] | Net gain (loss) from trading activities [Member] | Equity contract [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	0	0	0	0
Not Designated as Hedging Instrument [Member] | Economic hedges [Member] | Net gain (loss) from trading activities [Member] | Foreign exchange contract [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	0	0	0	0
Not Designated as Hedging Instrument [Member] | Economic hedges [Member] | Net gain (loss) from trading activities [Member] | Credit contract [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	0	0	0	0
Not Designated as Hedging Instrument [Member] | Economic hedges [Member] | Other [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	89	(324)	421	(901)
Not Designated as Hedging Instrument [Member] | Economic hedges [Member] | Other [Member] | Interest contracts [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	(1)	(19)	5	(64)
Not Designated as Hedging Instrument [Member] | Economic hedges [Member] | Other [Member] | Equity contract [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	8	1	13	(11)
Not Designated as Hedging Instrument [Member] | Economic hedges [Member] | Other [Member] | Foreign exchange contract [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	78	(300)	405	(834)
Not Designated as Hedging Instrument [Member] | Economic hedges [Member] | Other [Member] | Credit contract [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	4	(6)	(2)	8
Not Designated as Hedging Instrument [Member] | Customer accommodation trading, and other derivatives [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	(785)	(487)	806	(1,389)
Not Designated as Hedging Instrument [Member] | Customer accommodation trading, and other derivatives [Member] | Interest contracts [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	230	169	492	679
Not Designated as Hedging Instrument [Member] | Customer accommodation trading, and other derivatives [Member] | Equity contract [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	(1,259)	(851)	(411)	(2,525)
Not Designated as Hedging Instrument [Member] | Customer accommodation trading, and other derivatives [Member] | Foreign exchange contract [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	258	155	659	356
Not Designated as Hedging Instrument [Member] | Customer accommodation trading, and other derivatives [Member] | Credit contract [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	(28)	(31)	(22)	(59)
Not Designated as Hedging Instrument [Member] | Customer accommodation trading, and other derivatives [Member] | Commodity contract [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	14	63	88	138
Not Designated as Hedging Instrument [Member] | Customer accommodation trading, and other derivatives [Member] | Other contract [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	0	8	0	22
Not Designated as Hedging Instrument [Member] | Customer accommodation trading, and other derivatives [Member] | Mortgage banking [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	(67)	152	(372)	599
Not Designated as Hedging Instrument [Member] | Customer accommodation trading, and other derivatives [Member] | Mortgage banking [Member] | Interest contracts [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	(67)	152	(372)	599
Not Designated as Hedging Instrument [Member] | Customer accommodation trading, and other derivatives [Member] | Mortgage banking [Member] | Equity contract [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	0	0	0	0
Not Designated as Hedging Instrument [Member] | Customer accommodation trading, and other derivatives [Member] | Mortgage banking [Member] | Foreign exchange contract [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	0	0	0	0
Not Designated as Hedging Instrument [Member] | Customer accommodation trading, and other derivatives [Member] | Mortgage banking [Member] | Credit contract [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	0	0	0	0
Not Designated as Hedging Instrument [Member] | Customer accommodation trading, and other derivatives [Member] | Mortgage banking [Member] | Commodity contract [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	0	0	0	0
Not Designated as Hedging Instrument [Member] | Customer accommodation trading, and other derivatives [Member] | Mortgage banking [Member] | Other contract [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	0	0	0	0
Not Designated as Hedging Instrument [Member] | Customer accommodation trading, and other derivatives [Member] | Net gain (loss) from equity securities [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	0	0	0	0
Not Designated as Hedging Instrument [Member] | Customer accommodation trading, and other derivatives [Member] | Net gain (loss) from equity securities [Member] | Interest contracts [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	0	0	0	0
Not Designated as Hedging Instrument [Member] | Customer accommodation trading, and other derivatives [Member] | Net gain (loss) from equity securities [Member] | Equity contract [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	0	0	0	0
Not Designated as Hedging Instrument [Member] | Customer accommodation trading, and other derivatives [Member] | Net gain (loss) from equity securities [Member] | Foreign exchange contract [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	0	0	0	0
Not Designated as Hedging Instrument [Member] | Customer accommodation trading, and other derivatives [Member] | Net gain (loss) from equity securities [Member] | Credit contract [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	0	0	0	0
Not Designated as Hedging Instrument [Member] | Customer accommodation trading, and other derivatives [Member] | Net gain (loss) from equity securities [Member] | Commodity contract [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	0	0	0	0
Not Designated as Hedging Instrument [Member] | Customer accommodation trading, and other derivatives [Member] | Net gain (loss) from equity securities [Member] | Other contract [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	0	0	0	0
Not Designated as Hedging Instrument [Member] | Customer accommodation trading, and other derivatives [Member] | Net gain (loss) from trading activities [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	(605)	(647)	1,557	(2,010)
Not Designated as Hedging Instrument [Member] | Customer accommodation trading, and other derivatives [Member] | Net gain (loss) from trading activities [Member] | Interest contracts [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	298	17	865	80
Not Designated as Hedging Instrument [Member] | Customer accommodation trading, and other derivatives [Member] | Net gain (loss) from trading activities [Member] | Equity contract [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	(1,147)	(851)	(33)	(2,525)
Not Designated as Hedging Instrument [Member] | Customer accommodation trading, and other derivatives [Member] | Net gain (loss) from trading activities [Member] | Foreign exchange contract [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	258	155	659	356
Not Designated as Hedging Instrument [Member] | Customer accommodation trading, and other derivatives [Member] | Net gain (loss) from trading activities [Member] | Credit contract [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	(28)	(31)	(22)	(59)
Not Designated as Hedging Instrument [Member] | Customer accommodation trading, and other derivatives [Member] | Net gain (loss) from trading activities [Member] | Commodity contract [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	14	63	88	138
Not Designated as Hedging Instrument [Member] | Customer accommodation trading, and other derivatives [Member] | Net gain (loss) from trading activities [Member] | Other contract [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	0	0	0	0
Not Designated as Hedging Instrument [Member] | Customer accommodation trading, and other derivatives [Member] | Other [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	(113)	8	(379)	22
Not Designated as Hedging Instrument [Member] | Customer accommodation trading, and other derivatives [Member] | Other [Member] | Interest contracts [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	(1)	0	(1)	0
Not Designated as Hedging Instrument [Member] | Customer accommodation trading, and other derivatives [Member] | Other [Member] | Equity contract [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	(112)	0	(378)	0
Not Designated as Hedging Instrument [Member] | Customer accommodation trading, and other derivatives [Member] | Other [Member] | Foreign exchange contract [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	0	0	0	0
Not Designated as Hedging Instrument [Member] | Customer accommodation trading, and other derivatives [Member] | Other [Member] | Credit contract [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	0	0	0	0
Not Designated as Hedging Instrument [Member] | Customer accommodation trading, and other derivatives [Member] | Other [Member] | Commodity contract [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	0	0	0	0
Not Designated as Hedging Instrument [Member] | Customer accommodation trading, and other derivatives [Member] | Other [Member] | Other contract [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Net gains (losses) recognized related to derivatives not designated as hedging instruments	$ 0	$ 8	$ 0	$ 22

Derivatives, Sold and Purchased

Derivatives, Sold and Purchased Credit Derivatives (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Details of Sold and Purchased Credit Derivatives [Abstract]
Fair value liability	$ 141	$ 214
Notional amount Protection sold	9,185	9,021
Notional amount Protection purchased with identical underlyings	2,121	2,558
Notional Net protection sold	7,064	6,463
Notional Other protection purchased	15,953	14,959
Non-investment grade [Member]
Details of Sold and Purchased Credit Derivatives [Abstract]
Notional amount Protection sold	5,524	4,608
Corporate bonds [Member]
Details of Sold and Purchased Credit Derivatives [Abstract]
Fair value liability	23	35
Notional amount Protection sold	1,906	2,007
Notional amount Protection purchased with identical underlyings	1,266	1,575
Notional Net protection sold	640	432
Notional Other protection purchased	$ 1,300	$ 946
Corporate bonds [Member] | Minimum [Member]
Details of Sold and Purchased Credit Derivatives [Abstract]
Derivative range of maturity dates	Jan. 1, 2018	Jan. 1, 2018
Corporate bonds [Member] | Maximum [Member]
Details of Sold and Purchased Credit Derivatives [Abstract]
Derivative range of maturity dates	Dec. 31, 2027	Dec. 31, 2027
Corporate bonds [Member] | Non-investment grade [Member]
Details of Sold and Purchased Credit Derivatives [Abstract]
Notional amount Protection sold	$ 391	$ 510
Structured products [Member]
Details of Sold and Purchased Credit Derivatives [Abstract]
Fair value liability	55	86
Notional amount Protection sold	148	267
Notional amount Protection purchased with identical underlyings	130	232
Notional Net protection sold	18	35
Notional Other protection purchased	$ 114	$ 153
Structured products [Member] | Minimum [Member]
Details of Sold and Purchased Credit Derivatives [Abstract]
Derivative range of maturity dates	Jan. 1, 2022	Jan. 1, 2022
Structured products [Member] | Maximum [Member]
Details of Sold and Purchased Credit Derivatives [Abstract]
Derivative range of maturity dates	Dec. 31, 2047	Dec. 31, 2047
Structured products [Member] | Non-investment grade [Member]
Details of Sold and Purchased Credit Derivatives [Abstract]
Notional amount Protection sold	$ 143	$ 252
Credit default swap [Member]
Details of Sold and Purchased Credit Derivatives [Abstract]
Fair value liability	0	0
Notional amount Protection sold	2,194	2,626
Notional amount Protection purchased with identical underlyings	308	308
Notional Net protection sold	1,886	2,318
Notional Other protection purchased	$ 3,824	$ 3,932
Credit default swap [Member] | Minimum [Member]
Details of Sold and Purchased Credit Derivatives [Abstract]
Derivative range of maturity dates	Jan. 1, 2018	Jan. 1, 2018
Credit default swap [Member] | Maximum [Member]
Details of Sold and Purchased Credit Derivatives [Abstract]
Derivative range of maturity dates	Dec. 31, 2028	Dec. 31, 2027
Credit default swap [Member] | Non-investment grade [Member]
Details of Sold and Purchased Credit Derivatives [Abstract]
Notional amount Protection sold	$ 453	$ 540
Commercial Mortgage Backed Securities [Member]
Details of Sold and Purchased Credit Derivatives [Abstract]
Fair value liability	53	83
Notional amount Protection sold	402	423
Notional amount Protection purchased with identical underlyings	375	401
Notional Net protection sold	27	22
Notional Other protection purchased	$ 51	$ 87
Commercial Mortgage Backed Securities [Member] | Minimum [Member]
Details of Sold and Purchased Credit Derivatives [Abstract]
Derivative range of maturity dates	Jan. 1, 2047	Jan. 1, 2047
Commercial Mortgage Backed Securities [Member] | Maximum [Member]
Details of Sold and Purchased Credit Derivatives [Abstract]
Derivative range of maturity dates	Dec. 31, 2058	Dec. 31, 2058
Commercial Mortgage Backed Securities [Member] | Non-investment grade [Member]
Details of Sold and Purchased Credit Derivatives [Abstract]
Notional amount Protection sold	$ 122	$ 0
Asset-backed securities [Member]
Details of Sold and Purchased Credit Derivatives [Abstract]
Fair value liability	9	9
Notional amount Protection sold	43	42
Notional amount Protection purchased with identical underlyings	42	42
Notional Net protection sold	1	0
Notional Other protection purchased	$ 1	$ 1
Asset-backed securities [Member] | Minimum [Member]
Details of Sold and Purchased Credit Derivatives [Abstract]
Derivative range of maturity dates	Jan. 1, 2045	Jan. 1, 2045
Asset-backed securities [Member] | Maximum [Member]
Details of Sold and Purchased Credit Derivatives [Abstract]
Derivative range of maturity dates	Dec. 31, 2046	Dec. 31, 2046
Asset-backed securities [Member] | Non-investment grade [Member]
Details of Sold and Purchased Credit Derivatives [Abstract]
Notional amount Protection sold	$ 43	$ 0
Other Credit Derivatives [Member]
Details of Sold and Purchased Credit Derivatives [Abstract]
Fair value liability	1	1
Notional amount Protection sold	4,492	3,656
Notional amount Protection purchased with identical underlyings	0	0
Notional Net protection sold	4,492	3,656
Notional Other protection purchased	$ 10,663	$ 9,840
Other Credit Derivatives [Member] | Minimum [Member]
Details of Sold and Purchased Credit Derivatives [Abstract]
Derivative range of maturity dates	Jan. 1, 2018	Jan. 1, 2018
Other Credit Derivatives [Member] | Maximum [Member]
Details of Sold and Purchased Credit Derivatives [Abstract]
Derivative range of maturity dates	Dec. 31, 2038	Dec. 31, 2031
Other Credit Derivatives [Member] | Non-investment grade [Member]
Details of Sold and Purchased Credit Derivatives [Abstract]
Notional amount Protection sold	$ 4,372	$ 3,306

Derivatives Credit-Risk Conting

Derivatives Credit-Risk Contingent Feature Textuals (Details) - USD ($) $ in Billions	Sep. 30, 2018	Dec. 31, 2017
Derivatives [Abstract]
Aggregate fair value of derivative instruments with credit-risk-related contingent features, net liability	$ 7.7	$ 8.3
Collateral for derivative instruments with credit-risk-related contingent features	5.9	7.1
Additional collateral for derivative instruments with credit-risk-related contingent features	$ 1.8	$ 1.2

Fair Value, Measurements From B

Fair Value, Measurements From Brokers or Third Party Pricing Services (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Financial assets
Equity Securities	$ 38,322	$ 39,227
Derivative assets	34,779	36,355
Financial liabilities
Derivative liabilities	(32,670)	(34,298)
Brokers [Member] | Fair Value, Inputs, Level 1 [Member]
Financial assets
Trading debt securities	0	0
Equity Securities	0	0
Derivative assets	0	0
Financial liabilities
Derivative liabilities	0	0
Other liabilities (2)	0	0
Brokers [Member] | Fair Value, Inputs, Level 1 [Member] | Debt securities [Member]
Financial assets
Available-for-sale debt securities	0	0
Brokers [Member] | Fair Value, Inputs, Level 1 [Member] | Securities of U.S. Treasury and federal agencies [Member]
Financial assets
Available-for-sale debt securities	0	0
Brokers [Member] | Fair Value, Inputs, Level 1 [Member] | Securities of U.S. states and political subdivisions [Member]
Financial assets
Available-for-sale debt securities	0	0
Brokers [Member] | Fair Value, Inputs, Level 1 [Member] | Mortgage-Backed Securities [Member]
Financial assets
Available-for-sale debt securities	0	0
Brokers [Member] | Fair Value, Inputs, Level 1 [Member] | Other debt securities
Financial assets
Available-for-sale debt securities	0	0
Brokers [Member] | Fair Value, Inputs, Level 1 [Member] | Marketable Equity Securities
Financial assets
Equity Securities	0	0
Brokers [Member] | Fair Value, Inputs, Level 1 [Member] | Nonmarketable Equity Securities
Financial assets
Equity Securities	0	0
Brokers [Member] | Fair Value, Inputs, Level 2 [Member]
Financial assets
Trading debt securities	0	0
Equity Securities	0	0
Derivative assets	0	0
Financial liabilities
Derivative liabilities	0	0
Other liabilities (2)	0	0
Brokers [Member] | Fair Value, Inputs, Level 2 [Member] | Debt securities [Member]
Financial assets
Available-for-sale debt securities	450	340
Brokers [Member] | Fair Value, Inputs, Level 2 [Member] | Securities of U.S. Treasury and federal agencies [Member]
Financial assets
Available-for-sale debt securities	0	0
Brokers [Member] | Fair Value, Inputs, Level 2 [Member] | Securities of U.S. states and political subdivisions [Member]
Financial assets
Available-for-sale debt securities	0	0
Brokers [Member] | Fair Value, Inputs, Level 2 [Member] | Mortgage-Backed Securities [Member]
Financial assets
Available-for-sale debt securities	27	33
Brokers [Member] | Fair Value, Inputs, Level 2 [Member] | Other debt securities
Financial assets
Available-for-sale debt securities	423	307
Brokers [Member] | Fair Value, Inputs, Level 2 [Member] | Marketable Equity Securities
Financial assets
Equity Securities	0	0
Brokers [Member] | Fair Value, Inputs, Level 2 [Member] | Nonmarketable Equity Securities
Financial assets
Equity Securities	0	0
Brokers [Member] | Fair Value, Inputs, Level 3 [Member]
Financial assets
Trading debt securities	0	0
Equity Securities	0	0
Derivative assets	0	0
Financial liabilities
Derivative liabilities	0	0
Other liabilities (2)	0	0
Brokers [Member] | Fair Value, Inputs, Level 3 [Member] | Debt securities [Member]
Financial assets
Available-for-sale debt securities	967	1,158
Brokers [Member] | Fair Value, Inputs, Level 3 [Member] | Securities of U.S. Treasury and federal agencies [Member]
Financial assets
Available-for-sale debt securities	0	0
Brokers [Member] | Fair Value, Inputs, Level 3 [Member] | Securities of U.S. states and political subdivisions [Member]
Financial assets
Available-for-sale debt securities	0	0
Brokers [Member] | Fair Value, Inputs, Level 3 [Member] | Mortgage-Backed Securities [Member]
Financial assets
Available-for-sale debt securities	0	0
Brokers [Member] | Fair Value, Inputs, Level 3 [Member] | Other debt securities
Financial assets
Available-for-sale debt securities	967	1,158
Brokers [Member] | Fair Value, Inputs, Level 3 [Member] | Marketable Equity Securities
Financial assets
Equity Securities	0	0
Brokers [Member] | Fair Value, Inputs, Level 3 [Member] | Nonmarketable Equity Securities
Financial assets
Equity Securities	0	0
Third party pricing services [Member] | Fair Value, Inputs, Level 1 [Member]
Financial assets
Trading debt securities	0	926
Equity Securities	0	0
Derivative assets	34	19
Financial liabilities
Derivative liabilities	(38)	(19)
Other liabilities (2)	0	0
Third party pricing services [Member] | Fair Value, Inputs, Level 1 [Member] | Debt securities [Member]
Financial assets
Available-for-sale debt securities	3,267	3,389
Third party pricing services [Member] | Fair Value, Inputs, Level 1 [Member] | Securities of U.S. Treasury and federal agencies [Member]
Financial assets
Available-for-sale debt securities	3,267	3,389
Third party pricing services [Member] | Fair Value, Inputs, Level 1 [Member] | Securities of U.S. states and political subdivisions [Member]
Financial assets
Available-for-sale debt securities	0	0
Third party pricing services [Member] | Fair Value, Inputs, Level 1 [Member] | Mortgage-Backed Securities [Member]
Financial assets
Available-for-sale debt securities	0	0
Third party pricing services [Member] | Fair Value, Inputs, Level 1 [Member] | Other debt securities
Financial assets
Available-for-sale debt securities	0	0
Third party pricing services [Member] | Fair Value, Inputs, Level 1 [Member] | Marketable Equity Securities
Financial assets
Equity Securities	0	0
Third party pricing services [Member] | Fair Value, Inputs, Level 1 [Member] | Nonmarketable Equity Securities
Financial assets
Equity Securities	0	0
Third party pricing services [Member] | Fair Value, Inputs, Level 2 [Member]
Financial assets
Trading debt securities	212	215
Equity Securities	225	227
Derivative assets	0	0
Financial liabilities
Derivative liabilities	0	0
Other liabilities (2)	0	0
Third party pricing services [Member] | Fair Value, Inputs, Level 2 [Member] | Debt securities [Member]
Financial assets
Available-for-sale debt securities	255,135	266,744
Third party pricing services [Member] | Fair Value, Inputs, Level 2 [Member] | Securities of U.S. Treasury and federal agencies [Member]
Financial assets
Available-for-sale debt securities	2,920	2,930
Third party pricing services [Member] | Fair Value, Inputs, Level 2 [Member] | Securities of U.S. states and political subdivisions [Member]
Financial assets
Available-for-sale debt securities	47,382	50,401
Third party pricing services [Member] | Fair Value, Inputs, Level 2 [Member] | Mortgage-Backed Securities [Member]
Financial assets
Available-for-sale debt securities	160,382	168,948
Third party pricing services [Member] | Fair Value, Inputs, Level 2 [Member] | Other debt securities
Financial assets
Available-for-sale debt securities	44,451	44,465
Third party pricing services [Member] | Fair Value, Inputs, Level 2 [Member] | Marketable Equity Securities
Financial assets
Equity Securities	224	227
Third party pricing services [Member] | Fair Value, Inputs, Level 2 [Member] | Nonmarketable Equity Securities
Financial assets
Equity Securities	1	0
Third party pricing services [Member] | Fair Value, Inputs, Level 3 [Member]
Financial assets
Trading debt securities	0	0
Equity Securities	46	0
Derivative assets	0	0
Financial liabilities
Derivative liabilities	0	0
Other liabilities (2)	0	0
Third party pricing services [Member] | Fair Value, Inputs, Level 3 [Member] | Debt securities [Member]
Financial assets
Available-for-sale debt securities	129	146
Third party pricing services [Member] | Fair Value, Inputs, Level 3 [Member] | Securities of U.S. Treasury and federal agencies [Member]
Financial assets
Available-for-sale debt securities	0	0
Third party pricing services [Member] | Fair Value, Inputs, Level 3 [Member] | Securities of U.S. states and political subdivisions [Member]
Financial assets
Available-for-sale debt securities	40	49
Third party pricing services [Member] | Fair Value, Inputs, Level 3 [Member] | Mortgage-Backed Securities [Member]
Financial assets
Available-for-sale debt securities	41	75
Third party pricing services [Member] | Fair Value, Inputs, Level 3 [Member] | Other debt securities
Financial assets
Available-for-sale debt securities	48	22
Third party pricing services [Member] | Fair Value, Inputs, Level 3 [Member] | Marketable Equity Securities
Financial assets
Equity Securities	0	0
Third party pricing services [Member] | Fair Value, Inputs, Level 3 [Member] | Nonmarketable Equity Securities
Financial assets
Equity Securities	$ 46	$ 0

Fair Value, Assets and Liabilit

Fair Value, Assets and Liabilities Recorded at Fair Value on a Recurring Basis (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Assets:
Mortgage loans held for sale	$ 13,885	$ 16,116
Loans held for sale	1,266	1,023
Loans	286	376
Mortgage servicing rights	15,980	13,625
Derivative assets	34,779	36,355
Net amounts in consolidated balance sheet, assets	11,811	12,228
Equity Securities	38,322	39,227
Available-for-sale debt securities	262,964	276,407	[1]
Liabilities:
Total derivative liabilities	(32,670)	(34,298)
Fair value liability derivatives, net	(8,586)	(8,796)
Interest rate contract [Member]
Assets:
Net amounts in consolidated balance sheet, assets	5,158	5,701
Liabilities:
Fair value liability derivatives, net	(3,561)	(2,246)
Commodity contract [Member]
Assets:
Net amounts in consolidated balance sheet, assets	3,040	1,388
Liabilities:
Fair value liability derivatives, net	(893)	(687)
Equity contract [Member]
Assets:
Net amounts in consolidated balance sheet, assets	2,177	2,774
Liabilities:
Fair value liability derivatives, net	(2,775)	(4,460)
Foreign exchange contract [Member]
Assets:
Net amounts in consolidated balance sheet, assets	1,398	2,317
Liabilities:
Fair value liability derivatives, net	(1,346)	(1,379)
Fair Value, Measurements, Recurring [Member]
Assets:
Trading debt securities	65,188	57,624
Mortgage loans held for sale	13,885	16,116
Loans held for sale	1,266	1,023
Loans	286	376
Mortgage servicing rights	15,980	13,625
Fair value asset derivatives, netting	(22,968)	(24,127)
Net amounts in consolidated balance sheet, assets	11,811	12,228
Equity Securities	38,204	39,227
Available-for-sale debt securities	262,964	276,407
Liabilities:
Fair value liability derivatives, netting	24,084	25,502
Fair value liability derivatives, net	(8,586)	(8,796)
Total short sale liabilities	(23,992)	(18,472)
Other liabilities (2)	(2)	(3)
Total liabilities recorded at fair value	(32,580)	(27,271)
Fair Value, Measurements, Recurring [Member] | Interest rate contract [Member]
Assets:
Derivative assets	16,063	17,630
Liabilities:
Total derivative liabilities	(15,543)	(15,472)
Fair Value, Measurements, Recurring [Member] | Commodity contract [Member]
Assets:
Derivative assets	4,205	2,354
Liabilities:
Total derivative liabilities	(1,716)	(1,335)
Fair Value, Measurements, Recurring [Member] | Equity contract [Member]
Assets:
Derivative assets	7,823	7,007
Liabilities:
Total derivative liabilities	(8,724)	(8,501)
Fair Value, Measurements, Recurring [Member] | Foreign exchange contract [Member]
Assets:
Derivative assets	6,434	8,973
Liabilities:
Total derivative liabilities	(6,369)	(8,568)
Fair Value, Measurements, Recurring [Member] | Credit contract [Member]
Assets:
Derivative assets	254	391
Liabilities:
Total derivative liabilities	(318)	(422)
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Assets:
Trading debt securities	14,234	12,491
Mortgage loans held for sale	0	0
Loans held for sale	0	0
Loans	0	0
Mortgage servicing rights	0	0
Fair value asset derivatives, netting	0	0
Net amounts in consolidated balance sheet, assets	2,075	1,734
Equity Securities	30,799	33,931
Total assets recorded at fair value	50,410	51,601
Available-for-sale debt securities	3,302	3,445
Liabilities:
Fair value liability derivatives, netting	0	0
Fair value liability derivatives, net	(1,465)	(1,349)
Total short sale liabilities	(17,840)	(12,588)
Other liabilities (2)	0	0
Total liabilities recorded at fair value	(19,305)	(13,937)
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Interest rate contract [Member]
Assets:
Derivative assets	19	17
Liabilities:
Total derivative liabilities	(16)	(17)
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Commodity contract [Member]
Assets:
Derivative assets	0	0
Liabilities:
Total derivative liabilities	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Equity contract [Member]
Assets:
Derivative assets	2,022	1,698
Liabilities:
Total derivative liabilities	(1,411)	(1,313)
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Foreign exchange contract [Member]
Assets:
Derivative assets	34	19
Liabilities:
Total derivative liabilities	(38)	(19)
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Credit contract [Member]
Assets:
Derivative assets	0	0
Liabilities:
Total derivative liabilities	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Assets:
Trading debt securities	50,636	44,726
Mortgage loans held for sale	12,905	15,118
Loans held for sale	1,244	1,009
Loans	0	0
Mortgage servicing rights	0	0
Fair value asset derivatives, netting	0	0
Net amounts in consolidated balance sheet, assets	30,994	32,980
Equity Securities	1,077	475
Total assets recorded at fair value	354,249	364,276
Available-for-sale debt securities	257,393	269,968
Liabilities:
Fair value liability derivatives, netting	0	0
Fair value liability derivatives, net	(29,180)	(30,930)
Total short sale liabilities	(6,152)	(5,884)
Other liabilities (2)	0	0
Total liabilities recorded at fair value	(35,332)	(36,814)
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Interest rate contract [Member]
Assets:
Derivative assets	15,996	17,479
Liabilities:
Total derivative liabilities	(15,371)	(15,392)
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Commodity contract [Member]
Assets:
Derivative assets	4,129	2,318
Liabilities:
Total derivative liabilities	(1,701)	(1,318)
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Equity contract [Member]
Assets:
Derivative assets	4,306	3,970
Liabilities:
Total derivative liabilities	(5,544)	(5,338)
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Foreign exchange contract [Member]
Assets:
Derivative assets	6,391	8,944
Liabilities:
Total derivative liabilities	(6,301)	(8,546)
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Credit contract [Member]
Assets:
Derivative assets	172	269
Liabilities:
Total derivative liabilities	(263)	(336)
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Assets:
Trading debt securities	318	407
Mortgage loans held for sale	980	998
Loans held for sale	22	14
Loans	286	376
Mortgage servicing rights	15,980	13,625
Fair value asset derivatives, netting	0	0
Net amounts in consolidated balance sheet, assets	1,710	1,641
Equity Securities	6,328	4,821
Total assets recorded at fair value	27,893	24,876
Available-for-sale debt securities	2,269	2,994
Liabilities:
Fair value liability derivatives, netting	0	0
Fair value liability derivatives, net	(2,025)	(2,019)
Total short sale liabilities	0	0
Other liabilities (2)	(2)	(3)
Total liabilities recorded at fair value	(2,027)	(2,022)
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Interest rate contract [Member]
Assets:
Derivative assets	48	134
Liabilities:
Total derivative liabilities	(156)	(63)
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Commodity contract [Member]
Assets:
Derivative assets	76	36
Liabilities:
Total derivative liabilities	(15)	(17)
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Equity contract [Member]
Assets:
Derivative assets	1,495	1,339
Liabilities:
Total derivative liabilities	(1,769)	(1,850)
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Foreign exchange contract [Member]
Assets:
Derivative assets	9	10
Liabilities:
Total derivative liabilities	(30)	(3)
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Credit contract [Member]
Assets:
Derivative assets	82	122
Liabilities:
Total derivative liabilities	(55)	(86)
Fair Value, Measurements, Recurring [Member] | Fair Value Measured at Net Asset Value Per Share [Member]
Assets:
Equity Securities	118	0
Collateralized Securities, Other [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Available-for-sale debt securities	4,631	4,946
Collateralized Securities, Other [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Assets:
Available-for-sale debt securities	0	0
Collateralized Securities, Other [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Assets:
Available-for-sale debt securities	4,229	4,380
Collateralized Securities, Other [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Assets:
Available-for-sale debt securities	402	566
Other short sale liabilities [Member] | Fair Value, Measurements, Recurring [Member]
Liabilities:
Total short sale liabilities	(1)	(285)
Other short sale liabilities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Liabilities:
Total short sale liabilities	0	0
Other short sale liabilities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Liabilities:
Total short sale liabilities	(1)	(285)
Other short sale liabilities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Liabilities:
Total short sale liabilities	0	0
Equity Securities
Assets:
Equity Securities	6,313	4,867
Equity Securities | Fair Value, Measurements, Recurring [Member]
Liabilities:
Total short sale liabilities	(3,511)	(2,213)
Equity Securities | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Liabilities:
Total short sale liabilities	(3,506)	(2,168)
Equity Securities | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Liabilities:
Total short sale liabilities	(5)	(45)
Equity Securities | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Liabilities:
Total short sale liabilities	0	0
Mortgage Backed Securities, Other [Member] | Fair Value, Measurements, Recurring [Member]
Liabilities:
Total short sale liabilities	(121)
Mortgage Backed Securities, Other [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Liabilities:
Total short sale liabilities	0
Mortgage Backed Securities, Other [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Liabilities:
Total short sale liabilities	(121)
Mortgage Backed Securities, Other [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Liabilities:
Total short sale liabilities	0
Including NAV Investments [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Total assets recorded at fair value	409,702	416,626
Excluding NAV Investments [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Total assets recorded at fair value	409,584	416,626
Nonmarketable Equity Securities | Fair Value, Measurements, Recurring [Member]
Assets:
Equity Securities	6,361	4,867
Nonmarketable Equity Securities | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Assets:
Equity Securities	0	0
Nonmarketable Equity Securities | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Assets:
Equity Securities	33	46
Nonmarketable Equity Securities | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Assets:
Equity Securities	6,328	4,821
Marketable Equity Securities | Fair Value, Measurements, Recurring [Member]
Assets:
Equity Securities	31,843	34,360
Marketable Equity Securities | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Assets:
Equity Securities	30,799	33,931
Marketable Equity Securities | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Assets:
Equity Securities	1,044	429
Marketable Equity Securities | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Assets:
Equity Securities	0	0
Other debt securities
Assets:
Available-for-sale debt securities	5,303	5,648
Other debt securities | Fair Value, Measurements, Recurring [Member]
Assets:
Available-for-sale debt securities	1	0
Other debt securities | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Assets:
Available-for-sale debt securities	0	0
Other debt securities | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Assets:
Available-for-sale debt securities	1	0
Other debt securities | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Assets:
Available-for-sale debt securities	0	0
Other Trading Debt Securities [Domain] | Fair Value, Measurements, Recurring [Member]
Assets:
Trading debt securities	34	39
Other Trading Debt Securities [Domain] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Assets:
Trading debt securities	0	0
Other Trading Debt Securities [Domain] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Assets:
Trading debt securities	17	20
Other Trading Debt Securities [Domain] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Assets:
Trading debt securities	17	19
Asset-backed Securities [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Trading debt securities	960	993
Available-for-sale debt securities	5,302	5,648
Asset-backed Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Assets:
Trading debt securities	0	0
Available-for-sale debt securities	0	0
Asset-backed Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Assets:
Trading debt securities	960	993
Available-for-sale debt securities	4,900	5,082
Asset-backed Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Assets:
Trading debt securities	0	0
Available-for-sale debt securities	402	566
Mortgage-Backed Securities [Member]
Assets:
Available-for-sale debt securities	160,450	169,392
Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Trading debt securities	30,662	25,273
Available-for-sale debt securities	160,450	169,392
Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Assets:
Trading debt securities	0	0
Available-for-sale debt securities	0	0
Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Assets:
Trading debt securities	30,662	25,273
Available-for-sale debt securities	160,409	169,316
Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Assets:
Trading debt securities	0	0
Available-for-sale debt securities	41	76
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Assets:
Available-for-sale debt securities	153,511	160,219
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Available-for-sale debt securities	153,511	160,219
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Assets:
Available-for-sale debt securities	0	0
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Assets:
Available-for-sale debt securities	153,511	160,219
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Assets:
Available-for-sale debt securities	0	0
Residential [Member]
Assets:
Available-for-sale debt securities	2,966	4,608
Residential [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Available-for-sale debt securities	2,966	4,608
Residential [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Assets:
Available-for-sale debt securities	0	0
Residential [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Assets:
Available-for-sale debt securities	2,966	4,607
Residential [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Assets:
Available-for-sale debt securities	0	1
Commercial [Member]
Assets:
Available-for-sale debt securities	3,973	4,565
Commercial [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Available-for-sale debt securities	3,973	4,565
Commercial [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Assets:
Available-for-sale debt securities	0	0
Commercial [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Assets:
Available-for-sale debt securities	3,932	4,490
Commercial [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Assets:
Available-for-sale debt securities	41	75
Corporate debt securities [Member]
Assets:
Available-for-sale debt securities	6,614	7,666
Corporate debt securities [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Trading debt securities	11,861	11,791
Available-for-sale debt securities	6,614	7,666
Liabilities:
Total short sale liabilities	(5,416)	(4,986)
Corporate debt securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Assets:
Trading debt securities	0	0
Available-for-sale debt securities	35	56
Liabilities:
Total short sale liabilities	0	0
Corporate debt securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Assets:
Trading debt securities	11,826	11,760
Available-for-sale debt securities	6,191	7,203
Liabilities:
Total short sale liabilities	(5,416)	(4,986)
Corporate debt securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Assets:
Trading debt securities	35	31
Available-for-sale debt securities	388	407
Liabilities:
Total short sale liabilities	0	0
Collateralized Loan Obligations [Member]
Assets:
Available-for-sale debt securities	36,194	36,056
Collateralized Loan Obligations [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Trading debt securities	1,035	919
Available-for-sale debt securities	36,194	36,056
Collateralized Loan Obligations [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Assets:
Trading debt securities	0	0
Available-for-sale debt securities	0	0
Collateralized Loan Obligations [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Assets:
Trading debt securities	772	565
Available-for-sale debt securities	35,351	35,036
Collateralized Loan Obligations [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Assets:
Trading debt securities	263	354
Available-for-sale debt securities	843	1,020
Securities of U.S. states and political subdivisions [Member]
Assets:
Available-for-sale debt securities	48,216	51,326
Securities of U.S. states and political subdivisions [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Trading debt securities	3,218	3,735
Available-for-sale debt securities	48,216	51,326
Securities of U.S. states and political subdivisions [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Assets:
Trading debt securities	0	0
Available-for-sale debt securities	0	0
Securities of U.S. states and political subdivisions [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Assets:
Trading debt securities	3,215	3,732
Available-for-sale debt securities	47,621	50,401
Securities of U.S. states and political subdivisions [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Assets:
Trading debt securities	3	3
Available-for-sale debt securities	595	925
Securities of U.S. Treasury and federal agencies [Member]
Assets:
Available-for-sale debt securities	6,187	6,319
Securities of U.S. Treasury and federal agencies [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Trading debt securities	17,418	14,874
Available-for-sale debt securities	6,187	6,319
Liabilities:
Total short sale liabilities	(14,943)	(10,988)
Securities of U.S. Treasury and federal agencies [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Assets:
Trading debt securities	14,234	12,491
Available-for-sale debt securities	3,267	3,389
Liabilities:
Total short sale liabilities	(14,334)	(10,420)
Securities of U.S. Treasury and federal agencies [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Assets:
Trading debt securities	3,184	2,383
Available-for-sale debt securities	2,920	2,930
Liabilities:
Total short sale liabilities	(609)	(568)
Securities of U.S. Treasury and federal agencies [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Assets:
Trading debt securities	0	0
Available-for-sale debt securities	0	0
Liabilities:
Total short sale liabilities	0	0
Collateralized Debt Obligations [Member]
Assets:
Available-for-sale debt securities	843	1,000
Collateralized Auto Loans [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Available-for-sale debt securities	547	553
Collateralized Auto Loans [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Assets:
Available-for-sale debt securities	0	0
Collateralized Auto Loans [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Assets:
Available-for-sale debt securities	547	553
Collateralized Auto Loans [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Assets:
Available-for-sale debt securities	0	0
Home Equity Line of Credit [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Available-for-sale debt securities	124	149
Home Equity Line of Credit [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Assets:
Available-for-sale debt securities	0	0
Home Equity Line of Credit [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Assets:
Available-for-sale debt securities	124	149
Home Equity Line of Credit [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Assets:
Available-for-sale debt securities	$ 0	$ 0
[1]	(2)Financial information for the prior period has been revised to reflect the impact of the adoption in first quarter 2018 of ASU 2016-01 – Financial Instruments – Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities. See Note 1 (Summary of Significant Accounting Policies) for more information.

Fair Value, Assets and Liabil_2

Fair Value, Assets and Liabilities Measured on Recurring Basis Level 3 Reconciliation (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Trading Debt Securities [Member]
Assets:
Balance, beginning of period	$ 347	$ 463	$ 407	$ 374
Net gains (losses) included in net income	4	0	(2)	(5)
Net gains (losses) included in other comprehensive income	0	0	0	0
Purchases, sales, issuances and settlements, net	(19)	(20)	(72)	72
Transfers into Level 3	0	2	0	5
Transfers out of Level 3	(14)	0	15	(1)
Balance, end of period	318	445	318	445
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	4	(4)	4	(14)
Trading Debt Securities [Member] | Other Trading Debt Securities [Member]
Assets:
Balance, beginning of period	17	25	19	28
Net gains (losses) included in net income	0	0	(2)	(3)
Net gains (losses) included in other comprehensive income	0	0	0	0
Purchases, sales, issuances and settlements, net	0	0	0	0
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Balance, end of period	17	25	17	25
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	1	0	0	(2)
Trading Debt Securities [Member] | Asset-backed Securities [Member]
Assets:
Balance, beginning of period	0	0	0	0
Net gains (losses) included in net income	0	0	0	0
Net gains (losses) included in other comprehensive income	0	0	0	0
Purchases, sales, issuances and settlements, net	0	0	0	0
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Balance, end of period	0	0	0	0
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	0	0	0	0
Trading Debt Securities [Member] | Collateralized Mortgage Backed Securities [Member]
Assets:
Balance, beginning of period	0	0	0	0
Net gains (losses) included in net income	0	0	0	0
Net gains (losses) included in other comprehensive income	0	0	0	0
Purchases, sales, issuances and settlements, net	0	0	0	0
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Balance, end of period	0	0	0	0
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	0	0	0	0
Trading Debt Securities [Member] | Corporate Debt Securities [Member]
Assets:
Balance, beginning of period	36	26	31	34
Net gains (losses) included in net income	2	0	2	1
Net gains (losses) included in other comprehensive income	0	0	0	0
Purchases, sales, issuances and settlements, net	7	6	13	(5)
Transfers into Level 3	0	2	0	5
Transfers out of Level 3	(10)	0	11	(1)
Balance, end of period	35	34	35	34
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	2	0	4	0
Trading Debt Securities [Member] | Collateralized Loan Obligations [Member]
Assets:
Balance, beginning of period	291	403	354	309
Net gains (losses) included in net income	2	0	(2)	(3)
Net gains (losses) included in other comprehensive income	0	0	0	0
Purchases, sales, issuances and settlements, net	(26)	(20)	(85)	77
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	(4)	0	4	0
Balance, end of period	263	383	263	383
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	1	(4)	0	(12)
Trading Debt Securities [Member] | US States and Political Subdivisions Debt Securities [Member]
Assets:
Balance, beginning of period	3	9	3	3
Net gains (losses) included in net income	0	0	0	0
Net gains (losses) included in other comprehensive income	0	0	0	0
Purchases, sales, issuances and settlements, net	0	(6)	0	0
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Balance, end of period	3	3	3	3
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	0	0	0	0
Mortgage loans held for sale [Member]
Assets:
Balance, beginning of period	986	995	998	985
Net gains (losses) included in net income	(12)	(10)	(46)	(20)
Net gains (losses) included in other comprehensive income	0	0	0	0
Purchases, sales, issuances and settlements, net	(8)	(6)	(20)	(41)
Transfers into Level 3	16	55	56	116
Transfers out of Level 3	(2)	(2)	(8)	(8)
Balance, end of period	980	1,032	980	1,032
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	(12)	(11)	(42)	(21)
Loans held for sale [Member]
Assets:
Balance, beginning of period	20	14	14	0
Net gains (losses) included in net income	1	0	2	0
Net gains (losses) included in other comprehensive income	0	0	0	0
Purchases, sales, issuances and settlements, net	1	(1)	(15)	(3)
Transfers into Level 3	0	18	21	34
Transfers out of Level 3	0	0	0	0
Balance, end of period	22	31	22	31
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	0	0	0	0
Loans [Member]
Assets:
Balance, beginning of period	321	443	376	758
Net gains (losses) included in net income	0	0	(1)	(6)
Net gains (losses) included in other comprehensive income	0	0	0	0
Purchases, sales, issuances and settlements, net	(35)	(33)	(89)	(342)
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Balance, end of period	286	410	286	410
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	(5)	(3)	(9)	(9)
Mortgage servicing rights [Member]
Assets:
Balance, beginning of period	15,411	12,789	13,625	12,959
Net gains (losses) included in net income	69	(661)	801	(1,795)
Net gains (losses) included in other comprehensive income	0	0	0	0
Purchases, sales, issuances and settlements, net	500	1,210	1,554	2,174
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Balance, end of period	15,980	13,338	15,980	13,338
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	531	(142)	2,206	(328)
Derivative [Member]
Assets and Liabilities:
Balance, beginning of period	(345)	(297)	(378)	(81)
Net gains (losses) included in net income	(109)	77	(459)	529
Total net gains (losses) included in other comprehensive income	0	0	0	0
Purchases, sales, issuances and settlements, net	133	(190)	462	(753)
Transfers into Level 3	0	(15)	3	(37)
Transfers out of Level 3	6	(6)	57	(89)
Balance, end of period	(315)	(431)	(315)	(431)
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	(80)	(112)	(199)	(245)
Derivative [Member] | Interest rate contract [Member]
Assets and Liabilities:
Balance, beginning of period	(41)	115	71	121
Net gains (losses) included in net income	(103)	158	(511)	625
Total net gains (losses) included in other comprehensive income	0	0	0	0
Purchases, sales, issuances and settlements, net	36	(159)	332	(632)
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Balance, end of period	(108)	114	(108)	114
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	(43)	8	(163)	(10)
Derivative [Member] | Commodity contract [Member]
Assets and Liabilities:
Balance, beginning of period	26	17	19	23
Net gains (losses) included in net income	29	(16)	59	(14)
Total net gains (losses) included in other comprehensive income	0	0	0	0
Purchases, sales, issuances and settlements, net	6	9	(20)	3
Transfers into Level 3	0	2	3	2
Transfers out of Level 3	0	0	0	(2)
Balance, end of period	61	12	61	12
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	38	7	60	9
Derivative [Member] | Equity contract [Member]
Assets and Liabilities:
Balance, beginning of period	(339)	(471)	(511)	(267)
Net gains (losses) included in net income	(30)	(70)	27	(128)
Total net gains (losses) included in other comprehensive income	0	0	0	0
Purchases, sales, issuances and settlements, net	89	(27)	153	(70)
Transfers into Level 3	0	(17)	0	(39)
Transfers out of Level 3	6	(6)	57	(87)
Balance, end of period	(274)	(591)	(274)	(591)
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	(74)	(130)	(67)	(223)
Derivative [Member] | Foreign exchange contract [Member]
Assets and Liabilities:
Balance, beginning of period	(15)	4	7	12
Net gains (losses) included in net income	(10)	3	(35)	(5)
Total net gains (losses) included in other comprehensive income	0	0	0	0
Purchases, sales, issuances and settlements, net	4	0	7	0
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Balance, end of period	(21)	7	(21)	7
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	(4)	1	(23)	(1)
Derivative [Member] | Credit contract [Member]
Assets and Liabilities:
Balance, beginning of period	24	72	36	77
Net gains (losses) included in net income	5	(6)	1	29
Total net gains (losses) included in other comprehensive income	0	0	0	0
Purchases, sales, issuances and settlements, net	(2)	(13)	(10)	(53)
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Balance, end of period	27	53	27	53
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	3	(6)	(6)	(42)
Derivative [Member] | Other contract [Member]
Assets and Liabilities:
Balance, beginning of period	0	(34)	0	(47)
Net gains (losses) included in net income	0	8	0	22
Total net gains (losses) included in other comprehensive income	0	0	0	0
Purchases, sales, issuances and settlements, net	0	0	0	(1)
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Balance, end of period	0	(26)	0	(26)
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	0	8	0	22
Equity Securities
Assets:
Balance, beginning of period	5,806	3,960	5,203	3,259
Net gains (losses) included in net income	817	513	1,510	1,214
Net gains (losses) included in other comprehensive income	0	0	0	0
Purchases, sales, issuances and settlements, net	(295)	0	(391)	(1)
Transfers into Level 3	0	0	10	1
Transfers out of Level 3	0	0	(4)	0
Balance, end of period	6,328	4,473	6,328	4,473
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	770	513	1,457	1,215
Equity Securities | Nonmarketable Equity Securities
Assets:
Balance, beginning of period	5,806	3,960	5,203	3,259
Net gains (losses) included in net income	817	513	1,510	1,214
Net gains (losses) included in other comprehensive income	0	0	0	0
Purchases, sales, issuances and settlements, net	(295)	0	(391)	(1)
Transfers into Level 3	0	0	10	1
Transfers out of Level 3	0	0	(4)	0
Balance, end of period	6,328	4,473	6,328	4,473
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	770	513	1,457	1,215
Equity Securities | Marketable Equity Securities
Assets:
Balance, beginning of period	0	0	0	0
Net gains (losses) included in net income	0	0	0	0
Net gains (losses) included in other comprehensive income	0	0	0	0
Purchases, sales, issuances and settlements, net	0	0	0	0
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Balance, end of period	0	0	0	0
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	0	0	0	0
Short sale liabilities [Member]
Liabilities:
Balance, beginning of period	0	0	0	0
Net gains (losses) included in net income	0	0	0	0
Net gains (losses) included in other comprehensive income	0	0	0	0
Purchases, sales, issuances and settlements, net	0	(3)	0	(3)
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Balance, end of period	0	(3)	0	(3)
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	0	0	0	0
Other liabilities [Member]
Liabilities:
Balance, beginning of period	(2)	(3)	(3)	(4)
Net gains (losses) included in net income	0	0	1	1
Net gains (losses) included in other comprehensive income	0	0	0	0
Purchases, sales, issuances and settlements, net	0	0	0	0
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Balance, end of period	(2)	(3)	(2)	(3)
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	0	0	0	0
Available-for-sale securities [Member] | Collateralized Securities, Other [Member]
Assets:
Balance, beginning of period	401	872	566	962
Net gains (losses) included in net income	(4)	1	4	1
Net gains (losses) included in other comprehensive income	(2)	2	(10)	5
Purchases, sales, issuances and settlements, net	7	(240)	(158)	(333)
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Balance, end of period	402	635	402	635
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	(3)	0	(3)	0
Available-for-sale securities [Member] | Collateralized Auto Loans [Member]
Assets:
Balance, beginning of period	0	0	0	0
Net gains (losses) included in net income	0	0	0	0
Net gains (losses) included in other comprehensive income	0	0	0	0
Purchases, sales, issuances and settlements, net	0	0	0	0
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Balance, end of period	0	0	0	0
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	0	0	0	0
Available-for-sale securities [Member] | Commercial Mortgage Backed Securities [Member]
Assets:
Balance, beginning of period	53	75	75	91
Net gains (losses) included in net income	(1)	0	0	(6)
Net gains (losses) included in other comprehensive income	0	1	(2)	0
Purchases, sales, issuances and settlements, net	(11)	0	(32)	(9)
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Balance, end of period	41	76	41	76
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	(1)	0	(2)	(11)
Available-for-sale securities [Member] | Residential [Member]
Assets:
Balance, beginning of period	0	1	1	1
Net gains (losses) included in net income	0	0	0	0
Net gains (losses) included in other comprehensive income	1	0	0	0
Purchases, sales, issuances and settlements, net	(1)	0	(1)	0
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Balance, end of period	0	1	0	1
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	0	0	0	0
Available-for-sale securities [Member] | Asset-backed Securities [Member]
Assets:
Balance, beginning of period	401	872	566	962
Net gains (losses) included in net income	(4)	1	4	1
Net gains (losses) included in other comprehensive income	(2)	2	(10)	5
Purchases, sales, issuances and settlements, net	7	(240)	(158)	(333)
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Balance, end of period	402	635	402	635
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	(3)	0	(3)	0
Available-for-sale securities [Member] | Collateralized Mortgage Backed Securities [Member]
Assets:
Balance, beginning of period	53	76	76	92
Net gains (losses) included in net income	(1)	0	0	(6)
Net gains (losses) included in other comprehensive income	1	1	(2)	0
Purchases, sales, issuances and settlements, net	(12)	0	(33)	(9)
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Balance, end of period	41	77	41	77
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	(1)	0	(2)	(11)
Available-for-sale securities [Member] | Corporate Debt Securities [Member]
Assets:
Balance, beginning of period	443	376	407	432
Net gains (losses) included in net income	2	1	4	(13)
Net gains (losses) included in other comprehensive income	(2)	4	2	14
Purchases, sales, issuances and settlements, net	(55)	(1)	(25)	(53)
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Balance, end of period	388	380	388	380
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	0	0	0	0
Available-for-sale securities [Member] | Collateralized Loan Obligations [Member]
Assets:
Balance, beginning of period	1,037	1,002	1,020	879
Net gains (losses) included in net income	44	7	55	17
Net gains (losses) included in other comprehensive income	(33)	25	20	70
Purchases, sales, issuances and settlements, net	(205)	(20)	(252)	48
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Balance, end of period	843	1,014	843	1,014
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	0	0	0	0
Available-for-sale securities [Member] | US States and Political Subdivisions Debt Securities [Member]
Assets:
Balance, beginning of period	559	1,557	925	1,140
Net gains (losses) included in net income	0	3	5	4
Net gains (losses) included in other comprehensive income	(3)	3	(5)	7
Purchases, sales, issuances and settlements, net	39	(19)	(51)	884
Transfers into Level 3	0	0	0	5
Transfers out of Level 3	0	(838)	(279)	(1,334)
Balance, end of period	595	706	595	706
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	0	0	0	0
Available-for-sale securities [Member] | Debt securities [Member]
Assets:
Balance, beginning of period	2,493	3,883	2,994	3,505
Net gains (losses) included in net income	41	12	68	3
Net gains (losses) included in other comprehensive income	(39)	35	5	96
Purchases, sales, issuances and settlements, net	(226)	(280)	(519)	537
Transfers into Level 3	0	0	0	5
Transfers out of Level 3	0	(838)	(279)	(1,334)
Balance, end of period	2,269	2,812	2,269	2,812
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	(4)	$ 0	(5)	$ (11)
Auction Rate Securities [Member] | Accounting Standards Update 2016-01 [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Accounting Pronouncement, Reclassification Change in Beginning Balance	$ 382		$ 382

Fair Value, Assets and Liabil_3

Fair Value, Assets and Liabilities Measured on Recurring Basis Level 3 Reconciliation Breakout (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Trading Debt Securities [Member]
Assets:
Purchases	$ 83	$ 90	$ 362	$ 392
Sales	(71)	(74)	(303)	(224)
Issuances	0	0	0	0
Settlements	(31)	(36)	(131)	(96)
Net	(19)	(20)	(72)	72
Trading Debt Securities [Member] | Other Trading Debt Securities [Member]
Assets:
Purchases	0	0	0	0
Sales	0	0	0	0
Issuances	0	0	0	0
Settlements	0	0	0	0
Net	0	0	0	0
Trading Debt Securities [Member] | Corporate Debt Securities [Member]
Assets:
Purchases	8	9	16	18
Sales	(1)	(3)	(3)	(23)
Issuances	0	0	0	0
Settlements	0	0	0	0
Net	7	6	13	(5)
Trading Debt Securities [Member] | Asset-backed Securities [Member]
Assets:
Purchases	0	0	0	0
Sales	0	0	0	0
Issuances	0	0	0	0
Settlements	0	0	0	0
Net	0	0	0	0
Trading Debt Securities [Member] | Collateralized Mortgage Backed Securities [Member]
Assets:
Purchases	0	0	0	0
Sales	0	0	0	0
Issuances	0	0	0	0
Settlements	0	0	0	0
Net	0	0	0	0
Trading Debt Securities [Member] | Collateralized Loan Obligations [Member]
Assets:
Purchases	75	51	346	337
Sales	(70)	(36)	(300)	(165)
Issuances	0	0	0	0
Settlements	(31)	(35)	(131)	(95)
Net	(26)	(20)	(85)	77
Trading Debt Securities [Member] | US States and Political Subdivisions Debt Securities [Member]
Assets:
Purchases	0	30	0	37
Sales	0	(35)	0	(36)
Issuances	0	0	0	0
Settlements	0	(1)	0	(1)
Net	0	(6)	0	0
Available-for-sale securities [Member] | Corporate Debt Securities [Member]
Assets:
Purchases	0	0	31	4
Sales	0	0	0	0
Issuances	0	0	0	0
Settlements	(55)	(1)	(56)	(57)
Net	(55)	(1)	(25)	(53)
Available-for-sale securities [Member] | Collateralized Securities, Other [Member]
Assets:
Purchases	0	0	0	0
Sales	0	0	(8)	0
Issuances	96	16	154	198
Settlements	(89)	(256)	(304)	(531)
Net	7	(240)	(158)	(333)
Available-for-sale securities [Member] | Collateralized Auto Loans [Member]
Assets:
Purchases	0	0	0	0
Sales	0	0	0	0
Issuances	0	0	0	0
Settlements	0	0	0	0
Net	0	0	0	0
Available-for-sale securities [Member] | Commercial Mortgage Backed Securities [Member]
Assets:
Purchases	0	0	0	0
Sales	0	0	0	0
Issuances	0	0	0	0
Settlements	(11)	0	(32)	(9)
Net	(11)	0	(32)	(9)
Available-for-sale securities [Member] | Residential [Member]
Assets:
Purchases	0	0	0	0
Sales	0	0	0	0
Issuances	0	0	0	0
Settlements	(1)	0	(1)	0
Net	(1)	0	(1)	0
Available-for-sale securities [Member] | Asset-backed Securities [Member]
Assets:
Purchases	0	0	0	0
Sales	0	0	(8)	0
Issuances	96	16	154	198
Settlements	(89)	(256)	(304)	(531)
Net	7	(240)	(158)	(333)
Available-for-sale securities [Member] | Collateralized Mortgage Backed Securities [Member]
Assets:
Purchases	0	0	0	0
Sales	0	0	0	0
Issuances	0	0	0	0
Settlements	(12)	0	(33)	(9)
Net	(12)	0	(33)	(9)
Available-for-sale securities [Member] | Collateralized Loan Obligations [Member]
Assets:
Purchases	0	6	0	135
Sales	(149)	0	(149)	0
Issuances	0	0	0	0
Settlements	(56)	(26)	(103)	(87)
Net	(205)	(20)	(252)	48
Available-for-sale securities [Member] | US States and Political Subdivisions Debt Securities [Member]
Assets:
Purchases	0	0	0	0
Sales	0	(68)	(4)	(68)
Issuances	69	98	79	1,099
Settlements	(30)	(49)	(126)	(147)
Net	39	(19)	(51)	884
Available-for-sale securities [Member] | Debt securities [Member]
Assets:
Purchases	0	6	31	139
Sales	(149)	(68)	(161)	(68)
Issuances	165	114	233	1,297
Settlements	(242)	(332)	(622)	(831)
Net	(226)	(280)	(519)	537
Mortgage loans held for sale [Member]
Assets:
Purchases	17	17	64	57
Sales	(89)	(130)	(240)	(374)
Issuances	104	147	271	386
Settlements	(40)	(40)	(115)	(110)
Net	(8)	(6)	(20)	(41)
Loans held for sale [Member]
Assets:
Purchases	1	0	1	0
Sales	0	(1)	(16)	(1)
Issuances	0	0	0	0
Settlements	0	0	0	(2)
Net	1	(1)	(15)	(3)
Loans [Member]
Assets:
Purchases	2	2	3	5
Sales	0	0	0	(129)
Issuances	5	5	13	14
Settlements	(42)	(40)	(105)	(232)
Net	(35)	(33)	(89)	(342)
Mortgage servicing rights [Member]
Assets:
Purchases	0	541	0	541
Sales	(2)	64	(7)	9
Issuances	502	605	1,561	1,624
Settlements	0	0	0	0
Net	500	1,210	1,554	2,174
Derivative [Member]
Assets and Liabilities:
Purchases	4	1	12	5
Sales	(39)	(48)	(43)	(119)
Issuances	0	0	0	0
Settlements	168	(143)	493	(639)
Net	133	(190)	462	(753)
Derivative [Member] | Interest rate contract [Member]
Assets and Liabilities:
Purchases	0	0	0	0
Sales	0	0	0	0
Issuances	0	0	0	0
Settlements	36	(159)	332	(632)
Net	36	(159)	332	(632)
Derivative [Member] | Commodity contract [Member]
Assets and Liabilities:
Purchases	0	0	0	0
Sales	0	0	0	0
Issuances	0	0	0	0
Settlements	6	9	(20)	3
Net	6	9	(20)	3
Derivative [Member] | Equity contract [Member]
Assets and Liabilities:
Purchases	3	0	3	0
Sales	(37)	(48)	(37)	(117)
Issuances	0	0	0	0
Settlements	123	21	187	47
Net	89	(27)	153	(70)
Derivative [Member] | Foreign exchange contract [Member]
Assets and Liabilities:
Purchases	0	0	0	0
Sales	0	0	0	0
Issuances	0	0	0	0
Settlements	4	0	7	0
Net	4	0	7	0
Derivative [Member] | Credit contract [Member]
Assets and Liabilities:
Purchases	1	1	9	5
Sales	(2)	0	(6)	(2)
Issuances	0	0	0	0
Settlements	(1)	(14)	(13)	(56)
Net	(2)	(13)	(10)	(53)
Derivative [Member] | Other contract [Member]
Assets and Liabilities:
Purchases	0	0	0	0
Sales	0	0	0	0
Issuances	0	0	0	0
Settlements	0	0	0	(1)
Net	0	0	0	(1)
Equity Securities
Assets:
Purchases	0	0	0	0
Sales	0	0	(17)	(1)
Issuances	0	0	0	0
Settlements	(295)	0	(374)	0
Net	(295)	0	(391)	(1)
Equity Securities | Nonmarketable Equity Securities
Assets:
Purchases	0	0	0	0
Sales	0	0	(17)	(1)
Issuances	0	0	0	0
Settlements	(295)	0	(374)	0
Net	(295)	0	(391)	(1)
Equity Securities | Marketable Equity Securities
Assets:
Purchases	0	0	0	0
Sales	0	0	0	0
Issuances	0	0	0	0
Settlements	0	0	0	0
Net	0	0	0	0
Short sale liabilities [Member]
Liabilities:
Purchases	0	0	0	0
Sales	0	(3)	0	(3)
Issuances	0	0	0	0
Settlements	0	0	0	0
Net	0	(3)	0	(3)
Other liabilities [Member]
Liabilities:
Purchases	0	0	0	0
Sales	0	0	0	0
Issuances	0	0	0	0
Settlements	0	0	0	0
Net	$ 0	$ 0	$ 0	$ 0

Fair Value, Assets and Liabil_4

Fair Value, Assets and Liabilities Measured on a Recurring Basis Level 3 Valuation Techniques and Significant Unobservable Inputs (Details) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2018USD ($)$ / loan	Dec. 31, 2017USD ($)$ / loan
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Mortgage loans held for sale	$ 13,885	$ 16,116
Loans	286	376
Mortgage servicing rights	15,980	13,625
Fair value derivative assets	34,779	36,355
Aggregate Fair Value Of Derivative Loan Commitments Net Asset (Liability)	(7)	17
Fair value derivative liabilities	32,670	34,298
Recurring [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Financial and Nonfinancial Liabilities, Fair Value Disclosure	(32,580)	(27,271)
Mortgage loans held for sale	13,885	16,116
Loans	286	376
Mortgage servicing rights	15,980	13,625
Recurring [Member] | Interest rate contract [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Fair value derivative assets	16,063	17,630
Fair value derivative liabilities	15,543	15,472
Recurring [Member] | Equity contract [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Fair value derivative assets	7,823	7,007
Fair value derivative liabilities	8,724	8,501
Recurring [Member] | Credit contract [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Fair value derivative assets	254	391
Fair value derivative liabilities	318	422
Fair Value, Inputs, Level 3 [Member] | Recurring [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Financial and Nonfinancial Liabilities, Fair Value Disclosure	(2,027)	(2,022)
Mortgage loans held for sale	980	998
Loans	286	376
Mortgage servicing rights	15,980	13,625
Total insignificant level 3 assets, net of liabilities	541	570
Assets, Fair Value Disclosure	27,893	24,876
Assets, Fair Value Disclosure, Net of Liabilities	25,866	22,854
Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Mortgage loans held for sale	962	974
Loans	286	376
Mortgage servicing rights	15,980	13,625
Equity Securities	9	8
Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Valuation Technique, Vendor Pricing [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Available-for-sale debt securities	26	26
Equity Securities	46
Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Market comparable pricing [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Mortgage loans held for sale	18	24
Equity Securities	6,273	4,813
Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Derivative Loan Commitments [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Net derivative assets and liabilities	(7)	17
Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Interest rate contract [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Fair value derivative assets	48	134
Fair value derivative liabilities	156	63
Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Interest rate contract [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Net derivative assets and liabilities	(101)	54
Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Equity contract [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Net derivative assets and liabilities	(403)	(613)
Fair value derivative assets	1,495	1,339
Fair value derivative liabilities	1,769	1,850
Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Equity contract [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Net derivative assets and liabilities	129	102
Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Credit contract [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Fair value derivative assets	82	122
Fair value derivative liabilities	55	86
Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Credit contract [Member] | Market comparable pricing [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Net derivative assets and liabilities	(2)	(3)
Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Credit contract [Member] | Option model [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Net derivative assets and liabilities	29	39
Fair Value, Inputs, Level 2 [Member] | Recurring [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Financial and Nonfinancial Liabilities, Fair Value Disclosure	(35,332)	(36,814)
Mortgage loans held for sale	12,905	15,118
Loans	0	0
Mortgage servicing rights	0	0
Assets, Fair Value Disclosure	354,249	364,276
Fair Value, Inputs, Level 2 [Member] | Recurring [Member] | Interest rate contract [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Fair value derivative assets	15,996	17,479
Fair value derivative liabilities	15,371	15,392
Fair Value, Inputs, Level 2 [Member] | Recurring [Member] | Equity contract [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Fair value derivative assets	4,306	3,970
Fair value derivative liabilities	5,544	5,338
Fair Value, Inputs, Level 2 [Member] | Recurring [Member] | Credit contract [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Fair value derivative assets	172	269
Fair value derivative liabilities	263	336
Loans Receivable [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Loans	286	376
Mortgage loans held for sale [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Mortgage loans held for sale	13,885	16,116
Other Commercial and Consumer [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Available-for-sale debt securities	200	248
Diversified Payment Rights [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Available-for-sale debt securities	176	292
Collateralized Loan Obligations [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Valuation Technique, Vendor Pricing [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Available-for-sale debt securities	843	1,020
Collateralized Loan Obligations [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Market comparable pricing [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Available-for-sale debt securities	263	354
Municipal Bonds [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Available-for-sale debt securities	9	11
Municipal Bonds [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Valuation Technique, Vendor Pricing [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Available-for-sale debt securities	40	49
Government, healthcare and other revenue bonds [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Available-for-sale debt securities	$ 549	$ 868
Measurement Input, Discount Rate [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Minimum [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Mortgage Loans Held for Sale, Measurement Input	0.011	0.026
Loans, Measurement Input	0.034	0.031
Servicing Asset, Measurement Input	0.070	0.066
Nonmarketable equity securities, measurement input	10.00%	10.00%
Measurement Input, Discount Rate [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Maximum [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Mortgage Loans Held for Sale, Measurement Input	0.072	0.073
Loans, Measurement Input	0.074	0.075
Servicing Asset, Measurement Input	0.131	0.129
Nonmarketable equity securities, measurement input	10.00%	10.00%
Measurement Input, Discount Rate [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Weighted Average [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Mortgage Loans Held for Sale, Measurement Input	0.059	0.056
Loans, Measurement Input	0.042	0.042
Servicing Asset, Measurement Input	0.072	0.069
Nonmarketable equity securities, measurement input	10.00%	10.00%
Measurement Input, Discount Rate [Member] | Other Commercial and Consumer [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Minimum [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Debt Securities, Available-for-sale, Measurement Input	0.044	0.037
Measurement Input, Discount Rate [Member] | Other Commercial and Consumer [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Maximum [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Debt Securities, Available-for-sale, Measurement Input	0.059	0.052
Measurement Input, Discount Rate [Member] | Other Commercial and Consumer [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Weighted Average [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Debt Securities, Available-for-sale, Measurement Input	0.046	0.039
Measurement Input, Discount Rate [Member] | Diversified Payment Rights [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Minimum [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Debt Securities, Available-for-sale, Measurement Input	0.029	0.024
Measurement Input, Discount Rate [Member] | Diversified Payment Rights [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Maximum [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Debt Securities, Available-for-sale, Measurement Input	0.083	0.039
Measurement Input, Discount Rate [Member] | Diversified Payment Rights [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Weighted Average [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Debt Securities, Available-for-sale, Measurement Input	0.049	0.031
Measurement Input, Discount Rate [Member] | Municipal Bonds [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Minimum [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Debt Securities, Available-for-sale, Measurement Input	0.052	0.047
Measurement Input, Discount Rate [Member] | Municipal Bonds [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Maximum [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Debt Securities, Available-for-sale, Measurement Input	0.052	0.049
Measurement Input, Discount Rate [Member] | Municipal Bonds [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Weighted Average [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Debt Securities, Available-for-sale, Measurement Input	0.052	0.048
Measurement Input, Discount Rate [Member] | Government, healthcare and other revenue bonds [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Minimum [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Debt Securities, Available-for-sale, Measurement Input	0.022	0.017
Measurement Input, Discount Rate [Member] | Government, healthcare and other revenue bonds [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Maximum [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Debt Securities, Available-for-sale, Measurement Input	0.063	0.058
Measurement Input, Discount Rate [Member] | Government, healthcare and other revenue bonds [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Weighted Average [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Debt Securities, Available-for-sale, Measurement Input	0.031	0.027
Measurement Input, Price Volatility [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Minimum [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Nonmarketable equity securities, measurement input	2.30%	0.50%
Measurement Input, Price Volatility [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Maximum [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Nonmarketable equity securities, measurement input	3.10%	1.90%
Measurement Input, Price Volatility [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Weighted Average [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Nonmarketable equity securities, measurement input	2.50%	1.40%
Measurement Input, Price Volatility [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Equity contract [Member] | Minimum [Member] | Option model [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Derivative Asset (Liability) Net, Measurement Input	0.065	0.057
Measurement Input, Price Volatility [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Equity contract [Member] | Maximum [Member] | Option model [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Derivative Asset (Liability) Net, Measurement Input	1	0.955
Measurement Input, Price Volatility [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Equity contract [Member] | Weighted Average [Member] | Option model [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Derivative Asset (Liability) Net, Measurement Input	0.216	0.192
Measurement Input, Comparability Adjustment [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Minimum [Member] | Market comparable pricing [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Mortgage Loans Held for Sale, Measurement Input	(0.563)	(0.563)
Nonmarketable equity securities, measurement input	(21.10%)	(21.10%)
Measurement Input, Comparability Adjustment [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Maximum [Member] | Market comparable pricing [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Mortgage Loans Held for Sale, Measurement Input	(0.063)	(0.063)
Nonmarketable equity securities, measurement input	(6.50%)	(5.50%)
Measurement Input, Comparability Adjustment [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Weighted Average [Member] | Market comparable pricing [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Mortgage Loans Held for Sale, Measurement Input	(0.381)	(0.427)
Nonmarketable equity securities, measurement input	(14.90%)	(15.00%)
Measurement Input, Comparability Adjustment [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Credit contract [Member] | Minimum [Member] | Market comparable pricing [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Derivative Asset (Liability) Net, Measurement Input	(0.162)	(0.299)
Measurement Input, Comparability Adjustment [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Credit contract [Member] | Maximum [Member] | Market comparable pricing [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Derivative Asset (Liability) Net, Measurement Input	0.371	0.173
Measurement Input, Comparability Adjustment [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Credit contract [Member] | Weighted Average [Member] | Market comparable pricing [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Derivative Asset (Liability) Net, Measurement Input	0.016	(0.002)
Measurement Input, Comparability Adjustment [Member] | Collateralized Loan Obligations [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Minimum [Member] | Market comparable pricing [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Debt Securities, Available-for-sale, Measurement Input	(0.120)	(0.220)
Measurement Input, Comparability Adjustment [Member] | Collateralized Loan Obligations [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Maximum [Member] | Market comparable pricing [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Debt Securities, Available-for-sale, Measurement Input	0.178	0.195
Measurement Input, Comparability Adjustment [Member] | Collateralized Loan Obligations [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Weighted Average [Member] | Market comparable pricing [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Debt Securities, Available-for-sale, Measurement Input	0.023	0.030
Measurement Input, Credit Spread [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Credit contract [Member] | Minimum [Member] | Option model [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Derivative Asset (Liability) Net, Measurement Input	0	0
Measurement Input, Credit Spread [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Credit contract [Member] | Maximum [Member] | Option model [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Derivative Asset (Liability) Net, Measurement Input	0.092	0.637
Measurement Input, Credit Spread [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Credit contract [Member] | Weighted Average [Member] | Option model [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Derivative Asset (Liability) Net, Measurement Input	0.006	0.013
Measurement Input, Default Rate [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Minimum [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Mortgage Loans Held for Sale, Measurement Input	0	0
Measurement Input, Default Rate [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Maximum [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Mortgage Loans Held for Sale, Measurement Input	0.086	0.071
Measurement Input, Default Rate [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Weighted Average [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Mortgage Loans Held for Sale, Measurement Input	0.009	0.013
Measurement Input, Default Rate [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Interest rate contract [Member] | Minimum [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Derivative Asset (Liability) Net, Measurement Input	0.001	0
Measurement Input, Default Rate [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Interest rate contract [Member] | Maximum [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Derivative Asset (Liability) Net, Measurement Input	0.050	0.050
Measurement Input, Default Rate [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Interest rate contract [Member] | Weighted Average [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Derivative Asset (Liability) Net, Measurement Input	0.022	0.021
Measurement Input, Loss Severity [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Minimum [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Mortgage Loans Held for Sale, Measurement Input	0	0.001
Loans, Measurement Input	0	0
Measurement Input, Loss Severity [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Maximum [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Mortgage Loans Held for Sale, Measurement Input	0.452	0.414
Loans, Measurement Input	0.336	0.339
Measurement Input, Loss Severity [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Weighted Average [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Mortgage Loans Held for Sale, Measurement Input	0.250	0.196
Loans, Measurement Input	0.093	0.066
Measurement Input, Loss Severity [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Interest rate contract [Member] | Minimum [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Derivative Asset (Liability) Net, Measurement Input	0.500	0.500
Measurement Input, Loss Severity [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Interest rate contract [Member] | Maximum [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Derivative Asset (Liability) Net, Measurement Input	0.500	0.500
Measurement Input, Loss Severity [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Interest rate contract [Member] | Weighted Average [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Derivative Asset (Liability) Net, Measurement Input	0.500	0.500
Measurement Input, Loss Severity [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Credit contract [Member] | Minimum [Member] | Option model [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Derivative Asset (Liability) Net, Measurement Input	0.130	0.130
Measurement Input, Loss Severity [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Credit contract [Member] | Maximum [Member] | Option model [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Derivative Asset (Liability) Net, Measurement Input	0.600	0.600
Measurement Input, Loss Severity [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Credit contract [Member] | Weighted Average [Member] | Option model [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Derivative Asset (Liability) Net, Measurement Input	0.483	0.507
Measurement Input, Cost of Service Per Loan [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Minimum [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Servicing Asset, Measurement Input | $ / loan	77	78
Measurement Input, Cost of Service Per Loan [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Maximum [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Servicing Asset, Measurement Input | $ / loan	517	587
Measurement Input, Cost of Service Per Loan [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Weighted Average [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Servicing Asset, Measurement Input | $ / loan	129	143
Measurement Input, Cost of Service Per Loan [Member] | Non modified loans [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Minimum [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Servicing Asset, Measurement Input | $ / loan	77	78
Measurement Input, Cost of Service Per Loan [Member] | Non modified loans [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Maximum [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Servicing Asset, Measurement Input | $ / loan	235	252
Measurement Input, Prepayment Rate [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Minimum [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Mortgage Loans Held for Sale, Measurement Input	0.028	0.065
Loans, Measurement Input	0.038	0.087
Servicing Asset, Measurement Input	0.079	0.097
Measurement Input, Prepayment Rate [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Maximum [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Mortgage Loans Held for Sale, Measurement Input	0.128	0.159
Loans, Measurement Input	1	1
Servicing Asset, Measurement Input	0.203	0.205
Measurement Input, Prepayment Rate [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Weighted Average [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Mortgage Loans Held for Sale, Measurement Input	0.050	0.091
Loans, Measurement Input	0.891	0.919
Servicing Asset, Measurement Input	0.090	0.105
Measurement Input, Prepayment Rate [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Interest rate contract [Member] | Minimum [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Derivative Asset (Liability) Net, Measurement Input	0.028	0.028
Measurement Input, Prepayment Rate [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Interest rate contract [Member] | Maximum [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Derivative Asset (Liability) Net, Measurement Input	0.250	0.125
Measurement Input, Prepayment Rate [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Interest rate contract [Member] | Weighted Average [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Derivative Asset (Liability) Net, Measurement Input	0.118	0.105
Measurement Input, Fall-out Factor [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Derivative Loan Commitments [Member] | Minimum [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Derivative Asset (Liability) Net, Measurement Input	0.010	0.010
Measurement Input, Fall-out Factor [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Derivative Loan Commitments [Member] | Maximum [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Derivative Asset (Liability) Net, Measurement Input	0.990	0.990
Measurement Input, Fall-out Factor [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Derivative Loan Commitments [Member] | Weighted Average [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Derivative Asset (Liability) Net, Measurement Input	0.139	0.152
Measurement Input, Fall-out Factor [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Derivative Loan Commitments [Member] | Minimum [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Derivative Asset (Liability) Net, Measurement Input	(0.00403)	(0.00599)
Measurement Input, Fall-out Factor [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Derivative Loan Commitments [Member] | Maximum [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Derivative Asset (Liability) Net, Measurement Input	0.00793	0.01011
Measurement Input, Fall-out Factor [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Derivative Loan Commitments [Member] | Weighted Average [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Derivative Asset (Liability) Net, Measurement Input	0.00151	0.00027
Measurement Input, Conversion Factor [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Equity contract [Member] | Minimum [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Derivative Asset (Liability) Net, Measurement Input	(0.092)	(0.097)
Measurement Input, Conversion Factor [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Equity contract [Member] | Maximum [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Derivative Asset (Liability) Net, Measurement Input	0	0
Measurement Input, Conversion Factor [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Equity contract [Member] | Weighted Average [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Derivative Asset (Liability) Net, Measurement Input	(0.077)	(0.076)
Measurement Input, Weighted Average Life [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Equity contract [Member] | Minimum [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Derivative, Term of Contract	9 months	6 months
Measurement Input, Weighted Average Life [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Equity contract [Member] | Maximum [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Derivative, Term of Contract	2 years 3 months	3 years
Measurement Input, Weighted Average Life [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Equity contract [Member] | Weighted Average [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Derivative, Term of Contract	1 year 7 months	1 year 7 months
Measurement Input, Weighted Average Life [Member] | Other Commercial and Consumer [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Minimum [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Debt Securities, Trading and Available-for-sale, Term	1 year 3 months	2 years
Measurement Input, Weighted Average Life [Member] | Other Commercial and Consumer [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Maximum [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Debt Securities, Trading and Available-for-sale, Term	1 year 7 months	2 years 4 months
Measurement Input, Weighted Average Life [Member] | Other Commercial and Consumer [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Weighted Average [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Debt Securities, Trading and Available-for-sale, Term	1 year 5 months	2 years 1 month
Measurement Input, Correlation Factor [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Equity contract [Member] | Minimum [Member] | Option model [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Derivative Asset (Liability) Net, Measurement Input	(0.770)	(0.770)
Measurement Input, Correlation Factor [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Equity contract [Member] | Maximum [Member] | Option model [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Derivative Asset (Liability) Net, Measurement Input	0.990	0.980
Measurement Input, Correlation Factor [Member] | Fair Value, Inputs, Level 3 [Member] | Recurring [Member] | Equity contract [Member] | Weighted Average [Member] | Option model [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Derivative Asset (Liability) Net, Measurement Input	0.183	0.242

Fair Value, Assets Recorded at

Fair Value, Assets Recorded at Fair Value on Nonrecurring Basis (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage loans held for sale	$ 13,885	$ 16,116
Loans held for sale	1,266	1,023
Loans	286	376
Other assets	78,248	90,244	[1]
Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage loans held for sale	2,893	2,979
Loans held for sale	334	108
Loans	609	886
Nonmarketable equity securities	825	136
Other assets	189	338
Assets, Fair Value Disclosure	4,850	4,447
Nonrecurring [Member] | Total Commercial [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	313	374
Nonrecurring [Member] | Total Consumer [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	296	512
Fair Value Measured at Net Asset Value Per Share [Member] | Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Nonmarketable equity securities		6
Level 1 [Member] | Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage loans held for sale	0	0
Loans held for sale	0	0
Loans	0	0
Nonmarketable equity securities	0	0
Other assets	0	0
Assets, Fair Value Disclosure	0	0
Level 1 [Member] | Nonrecurring [Member] | Total Commercial [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	0	0
Level 1 [Member] | Nonrecurring [Member] | Total Consumer [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	0	0
Level 2 [Member] | Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage loans held for sale	1,641	1,646
Loans held for sale	334	108
Loans	608	876
Nonmarketable equity securities	613	0
Other assets	183	177
Assets, Fair Value Disclosure	3,379	2,807
Level 2 [Member] | Nonrecurring [Member] | Total Commercial [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	313	374
Level 2 [Member] | Nonrecurring [Member] | Total Consumer [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	295	502
Level 3 [Member] | Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage loans held for sale	1,252	1,333
Loans held for sale	0	0
Loans	1	10
Nonmarketable equity securities	212	136
Other assets	6	161
Assets, Fair Value Disclosure	1,471	1,640
Level 3 [Member] | Nonrecurring [Member] | Total Commercial [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	0	0
Level 3 [Member] | Nonrecurring [Member] | Total Consumer [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	$ 1	$ 10
[1]	(2)Financial information for the prior period has been revised to reflect the impact of the adoption in first quarter 2018 of ASU 2016-01 – Financial Instruments – Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities. See Note 1 (Summary of Significant Accounting Policies) for more information.

Fair Value, Changes in Fair Val

Fair Value, Changes in Fair Value of Assets Recorded at Fair Value on Nonrecurring Basis (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Fair Value Assets And Liabilities Measured On Nonrecurring Basis Increase (Decrease) [Line Items]
Mortgage loans held for sale (LOCOM)	$ 7	$ 23
Loans held for sale	(46)	(1)
Loans	(416)	(657)
Nonmarketable equity securities	206	(108)
Other assets	(36)	(71)
Total	(285)	(814)
Total Commercial [Member]
Fair Value Assets And Liabilities Measured On Nonrecurring Basis Increase (Decrease) [Line Items]
Loans	(175)	(286)
Total Consumer [Member]
Fair Value Assets And Liabilities Measured On Nonrecurring Basis Increase (Decrease) [Line Items]
Loans	$ (241)	$ (371)

Fair Value, Assets Recorded a_2

Fair Value, Assets Recorded at Fair Value on a Nonrecurring Basis Level 3 Valuation Techniques and Significant Unobservable Inputs (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Mortgage loans held for sale	$ 13,885	$ 16,116
Nonrecurring [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Mortgage loans held for sale	2,893	2,979
Nonmarketable equity securities	825	136
Total assets recorded at fair value	4,850	4,447
Fair Value, Inputs, Level 3 [Member] | Nonrecurring [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Mortgage loans held for sale	1,252	1,333
Nonmarketable equity securities	212	136
Insignificant level 3 assets	207	185
Total assets recorded at fair value	1,471	1,640
Fair Value, Inputs, Level 3 [Member] | Nonrecurring [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Nonmarketable equity securities	12	122
Fair Value, Inputs, Level 3 [Member] | Nonrecurring [Member] | Residential [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Mortgage loans held for sale	1,252	1,333
Government Insured Or Guaranteed [Member] | Residential [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Mortgage loans held for sale	1,200	1,300
Non Government Insured Or Guaranteed [Member] | Residential [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Mortgage loans held for sale	$ 26	$ 26
Measurement Input, Default Rate [Member] | Nonrecurring [Member] | Minimum [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Mortgage loans held for sale (residential), measurement input	0.20%	0.10%
Measurement Input, Default Rate [Member] | Nonrecurring [Member] | Maximum [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Mortgage loans held for sale (residential), measurement input	2.40%	4.10%
Measurement Input, Default Rate [Member] | Nonrecurring [Member] | Weighted Average [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Mortgage loans held for sale (residential), measurement input	1.30%	1.70%
Measurement Input, Discount Rate [Member] | Nonrecurring [Member] | Minimum [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Mortgage loans held for sale (residential), measurement input	1.50%	1.50%
Nonmarketable equity securities, measurement input	5.00%	5.00%
Measurement Input, Discount Rate [Member] | Nonrecurring [Member] | Maximum [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Mortgage loans held for sale (residential), measurement input	8.50%	8.50%
Nonmarketable equity securities, measurement input	10.50%	10.50%
Measurement Input, Discount Rate [Member] | Nonrecurring [Member] | Weighted Average [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Mortgage loans held for sale (residential), measurement input	4.00%	3.80%
Nonmarketable equity securities, measurement input	7.30%	10.20%
Measurement Input, Loss Severity [Member] | Nonrecurring [Member] | Minimum [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Mortgage loans held for sale (residential), measurement input	0.60%	0.70%
Measurement Input, Loss Severity [Member] | Nonrecurring [Member] | Maximum [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Mortgage loans held for sale (residential), measurement input	63.00%	52.90%
Measurement Input, Loss Severity [Member] | Nonrecurring [Member] | Weighted Average [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Mortgage loans held for sale (residential), measurement input	1.90%	2.20%
Measurement Input, Prepayment Rate [Member] | Nonrecurring [Member] | Minimum [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Mortgage loans held for sale (residential), measurement input	4.60%	5.40%
Measurement Input, Prepayment Rate [Member] | Nonrecurring [Member] | Maximum [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Mortgage loans held for sale (residential), measurement input	100.00%	100.00%
Measurement Input, Prepayment Rate [Member] | Nonrecurring [Member] | Weighted Average [Member] | Discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Mortgage loans held for sale (residential), measurement input	47.40%	50.60%

Fair Value, Option, Carrying Am

Fair Value, Option, Carrying Amount (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Fair Value, Option, Quantitative Disclosures [Line Items]
Mortgage loans held for sale	$ 13,885		$ 13,885		$ 16,116
Loans held for sale	1,266		1,266		1,023
Loans	286		286		376
Equity Securities	38,322		38,322		39,227
Mortgage loans held for sale [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Mortgage loans held for sale	13,885		13,885		16,116
Mortgage loans held for sale, unpaid principal	13,808		13,808		15,827
Loans, Loans held for sale and Mortgage loans held for sale, aggregate difference	77		77		289
Nonaccrual loans	122		122		127
Nonaccrual loans, unpaid principal	158		158		165
Nonaccrual loans, Aggregate difference	(36)		(36)		(38)
Loans 90 days or more past due and still accruing	8		8		16
Loans 90 days or more past due and still accruing, Unpaid principal	11		11		21
Loans 90 days or more past due and still accruing, Aggregate difference	(3)		(3)		(5)
Loans held for sale [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Loans held for sale	1,266		1,266		1,023
Loans held for sale, unpaid principal	1,301		1,301		1,075
Loans, Loans held for sale and Mortgage loans held for sale, aggregate difference	(35)		(35)		(52)
Nonaccrual loans	33		33		34
Nonaccrual loans, unpaid principal	47		47		56
Nonaccrual loans, Aggregate difference	(14)		(14)		(22)
Loans [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Loans	286		286		376
Loans, Unpaid principal	318		318		404
Loans, Loans held for sale and Mortgage loans held for sale, aggregate difference	(32)		(32)		(28)
Nonaccrual loans	206		206		253
Nonaccrual loans, unpaid principal	238		238		281
Nonaccrual loans, Aggregate difference	(32)		(32)		(28)
Equity Securities
Fair Value, Option, Quantitative Disclosures [Line Items]
Equity Securities	6,313		6,313		$ 4,867
Net gains losses from trading activities [Member] | Mortgage loans held for sale [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair Value, Option, Changes in Fair Value, Gain (Loss)	0	$ 0	0	$ 0
Net gains losses from trading activities [Member] | Loans held for sale [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair Value, Option, Changes in Fair Value, Gain (Loss)	3	6	18	42
Net gains losses from trading activities [Member] | Loans [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair Value, Option, Changes in Fair Value, Gain (Loss)	0	0	0	0
Net gains losses from trading activities [Member] | Equity Securities
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair Value, Option, Changes in Fair Value, Gain (Loss)	$ 0	$ 0	$ 0	$ 0

Fair Value, Option, Gains and L

Fair Value, Option, Gains and Losses (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair Value, Option, Credit Risk, Gains (Losses) on Assets	$ 2	$ 2	$ 16	$ 33
Mortgage loans held for sale [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair Value, Option, Credit Risk, Gains (Losses) on Assets	(1)	(4)	(2)	(9)
Loans held for sale [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair Value, Option, Credit Risk, Gains (Losses) on Assets	3	6	18	42
Mortgage banking noninterest income [Member] | Mortgage loans held for sale [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	183	400	238	967
Mortgage banking noninterest income [Member] | Loans held for sale [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	0	0	0	0
Mortgage banking noninterest income [Member] | Loans [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	0	0	0	0
Mortgage banking noninterest income [Member] | Equity Securities
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	0	0	0	0
Mortgage banking noninterest income [Member] | Other interests held [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	0	0	0	0
Net gains (losses) from trading activities [Member] | Mortgage loans held for sale [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	0	0	0	0
Net gains (losses) from trading activities [Member] | Loans held for sale [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	3	6	18	42
Net gains (losses) from trading activities [Member] | Loans [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	0	0	0	0
Net gains (losses) from trading activities [Member] | Equity Securities
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	0	0	0	0
Net gains (losses) from trading activities [Member] | Other interests held [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	0	(1)	(2)	(5)
Net gains (losses) from equity securities [Member] | Mortgage loans held for sale [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	0	0	0	0
Net gains (losses) from equity securities [Member] | Loans held for sale [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	0	0	0	0
Net gains (losses) from equity securities [Member] | Loans [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	0	0	0	0
Net gains (losses) from equity securities [Member] | Equity Securities
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	798	522	1,492	1,233
Net gains (losses) from equity securities [Member] | Other interests held [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	0	0	0	0
Other noninterest income [Member] | Mortgage loans held for sale [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	0	0	0	0
Other noninterest income [Member] | Loans held for sale [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	1	0	1	1
Other noninterest income [Member] | Loans [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	0	0	(1)	0
Other noninterest income [Member] | Equity Securities
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	0	0	0	0
Other noninterest income [Member] | Other interests held [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	$ 0	$ 0	$ 0	$ 0

Fair Value, Option, Instrument

Fair Value, Option, Instrument Specific Credit Risk (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (losses) attributable to instrument-specific credit risk	$ 2	$ 2	$ 16	$ 33
Mortgage loans held for sale [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (losses) attributable to instrument-specific credit risk	(1)	(4)	(2)	(9)
Loans held for sale [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (losses) attributable to instrument-specific credit risk	$ 3	$ 6	$ 18	$ 42

Fair Value, Estimates for Finan

Fair Value, Estimates for Financial Instruments Excluding those Recorded at Fair Value on a Recurring Basis (Details) - USD ($)		Sep. 30, 2018	Dec. 31, 2017
Financial assets
Cash and due from banks		$ 18,791,000,000	$ 23,367,000,000
Held-to-maturity debt securities		144,131,000,000	139,335,000,000
Loans	[1]	942,300,000,000	956,770,000,000
Financial liabilities
Deposits		1,266,594,000,000	1,335,991,000,000
Short-term borrowings		105,451,000,000	103,256,000,000
Long-term debt		221,323,000,000	225,020,000,000
Deposit Liabilities With No Defined or Contractual Maturity		1,100,000,000,000	1,200,000,000,000
Capital Lease Obligations		37,000,000	39,000,000
Carrying value [Member]
Financial assets
Cash and due from banks		18,791,000,000	23,367,000,000
Interest-earning deposits with banks		140,732,000,000	192,580,000,000
Federal funds sold and securities purchased under resale agreements		83,471,000,000	80,025,000,000
Held-to-maturity debt securities		144,131,000,000	139,335,000,000
Mortgage loans held for sale		5,340,000,000	3,954,000,000
Loans held for sale		499,000,000	108,000,000
Loans		912,548,000,000	926,273,000,000
Nonmarketable equity securities		5,467,000,000	7,136,000,000
Assets		1,310,979,000,000	1,372,778,000,000
Financial liabilities
Deposits		128,648,000,000	128,594,000,000
Short-term borrowings		105,451,000,000	103,256,000,000
Long-term debt		221,286,000,000	224,981,000,000
Financial Liabilities Fair Value Disclosure		455,385,000,000	456,831,000,000
Carrying value [Member] | Fair Value Measured at Net Asset Value Per Share [Member]
Financial assets
Nonmarketable equity securities			27,000,000
Estimated fair value [Member]
Financial assets
Cash and due from banks		18,791,000,000	23,367,000,000
Interest-earning deposits with banks		140,732,000,000	192,580,000,000
Federal funds sold and securities purchased under resale agreements		83,471,000,000	80,025,000,000
Held-to-maturity debt securities		139,036,000,000	138,985,000,000
Mortgage loans held for sale		5,350,000,000	3,958,000,000
Loans held for sale		500,000,000	108,000,000
Loans		913,620,000,000	938,335,000,000
Nonmarketable equity securities		5,500,000,000	7,628,000,000
Assets		1,307,000,000,000	1,384,986,000,000
Financial liabilities
Deposits		128,529,000,000	127,914,000,000
Short-term borrowings		105,451,000,000	103,256,000,000
Long-term debt		224,315,000,000	230,268,000,000
Financial Liabilities Fair Value Disclosure		458,295,000,000	461,438,000,000
Loan Commitments And Standby, Commercial And Similar Letters of Credit		1,000,000,000	1,000,000,000
Estimated fair value [Member] | Fair Value Measured at Net Asset Value Per Share [Member]
Financial assets
Nonmarketable equity securities			30,000,000
Estimated fair value [Member] | Fair Value, Inputs, Level 1 [Member]
Financial assets
Cash and due from banks		18,791,000,000	23,367,000,000
Interest-earning deposits with banks		140,566,000,000	192,455,000,000
Federal funds sold and securities purchased under resale agreements		0	1,002,000,000
Held-to-maturity debt securities		43,668,000,000	44,806,000,000
Mortgage loans held for sale		0	0
Loans held for sale		0	0
Loans		0	0
Nonmarketable equity securities		0	0
Assets		203,025,000,000	261,630,000,000
Financial liabilities
Deposits		0	0
Short-term borrowings		0	0
Long-term debt		0	0
Financial Liabilities Fair Value Disclosure		0	0
Estimated fair value [Member] | Fair Value, Inputs, Level 2 [Member]
Financial assets
Cash and due from banks		0	0
Interest-earning deposits with banks		166,000,000	125,000,000
Federal funds sold and securities purchased under resale agreements		83,471,000,000	78,954,000,000
Held-to-maturity debt securities		94,881,000,000	93,694,000,000
Mortgage loans held for sale		4,098,000,000	2,625,000,000
Loans held for sale		500,000,000	108,000,000
Loans		46,272,000,000	51,713,000,000
Nonmarketable equity securities		0	23,000,000
Assets		229,388,000,000	227,242,000,000
Financial liabilities
Deposits		107,272,000,000	108,146,000,000
Short-term borrowings		105,451,000,000	103,256,000,000
Long-term debt		222,436,000,000	227,109,000,000
Financial Liabilities Fair Value Disclosure		435,159,000,000	438,511,000,000
Estimated fair value [Member] | Fair Value, Inputs, Level 3 [Member]
Financial assets
Cash and due from banks		0	0
Interest-earning deposits with banks		0	0
Federal funds sold and securities purchased under resale agreements		0	69,000,000
Held-to-maturity debt securities		487,000,000	485,000,000
Mortgage loans held for sale		1,252,000,000	1,333,000,000
Loans held for sale		0	0
Loans		867,348,000,000	886,622,000,000
Nonmarketable equity securities		5,500,000,000	7,605,000,000
Assets		874,587,000,000	896,114,000,000
Financial liabilities
Deposits		21,257,000,000	19,768,000,000
Short-term borrowings		0	0
Long-term debt		1,879,000,000	3,159,000,000
Financial Liabilities Fair Value Disclosure		23,136,000,000	22,927,000,000
Finance Leases Financing Receivable [Member]
Financial assets
Loans		19,700,000,000	$ 19,400,000,000
Measurement alternative
Financial assets
Nonmarketable equity securities		$ 1,400,000,000
[1]	(3)Parenthetical amounts represent assets and liabilities for which we are required to carry at fair value or have elected the fair value option.

Preferred Stock (Details)

Preferred Stock (Details) $ / shares in Units, $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2018USD ($)vote$ / sharesshares	Dec. 31, 2017USD ($)$ / sharesshares
Detail of Preferred Stock [Abstract]
Preferred Stock, Shares authorized and designated | shares	9,854,906	12,036,414
ESOP, Liquidation preference per share | $ / shares	$ 0	$ 0
ESOP, Shares authorized and designated | shares	1,674,596	1,556,104
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Shares issued and outstanding | shares	9,645,352	11,677,235
Voting Rights	If issued, preference shares would be limited to one vote per share
Preferred Stock, Liquidation Preference, Value	$ 24,726	$ 26,757
Carrying value	23,482	25,358
Discount	$ 1,244	$ 1,399
ESOP Shares issued and outstanding | shares	1,674,596	1,556,104
ESOP Liquidation preference value	$ 1,675	$ 1,556
ESOP Carrying value	1,675	1,556
ESOP Discount	$ 0	$ 0
Preferred Stock, No Voting Rights [Member]
Class of Stock [Line Items]
Preferred shares authorized | shares	20,000,000
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Preferred Stock, Par or Stated Value	$ 0
Preferred Stock, Voting Rights [Member]
Class of Stock [Line Items]
Preferred shares authorized | shares	4,000,000
Number of votes per share | vote	1
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Shares issued and outstanding | shares	0
Preferred Stock, Par or Stated Value	$ 0
Dividend Equalization Preferred Shares (DEP) [Member]
Detail of Preferred Stock [Abstract]
Preferred Stock, Liquidation preference per share (in dollars per share) | $ / shares	$ 10	$ 10
Preferred Stock, Shares authorized and designated | shares	97,000	97,000
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Shares issued and outstanding | shares	96,546	96,546
Preferred Stock, Liquidation Preference, Value	$ 0	$ 0
Carrying value	0	0
Discount	$ 0	$ 0
Series I - Floating Class A Preferred Stock [Member]
Detail of Preferred Stock [Abstract]
Preferred Stock, Dividend Payment Rate, Variable	the greater of three-month LIBOR plus 0.93% and 5.56975%	the greater of three-month LIBOR plus 0.93% and 5.56975%
Preferred Stock, Liquidation preference per share (in dollars per share) | $ / shares	$ 100,000	$ 100,000
Preferred Stock, Shares authorized and designated | shares	25,010	25,010
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Shares issued and outstanding | shares	25,010	25,010
Preferred Stock, Liquidation Preference, Value	$ 2,501	$ 2,501
Carrying value	2,501	2,501
Discount	$ 0	$ 0
Series J - 8.00% Non-Cumulative Perpetual Class A Preferred Stock [Member]
Detail of Preferred Stock [Abstract]
Preferred Stock, Dividend rate (percent)	0.00%	8.00%
Preferred Stock, Liquidation preference per share (in dollars per share) | $ / shares	$ 0	$ 1,000
Preferred Stock, Shares authorized and designated | shares	0	2,300,000
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Shares issued and outstanding | shares	0	2,150,375
Preferred Stock, Liquidation Preference, Value	$ 0	$ 2,150
Carrying value	0	1,995
Discount	$ 0	$ 155
Series K - Floating Non-Cumulative Perpetual Class A Preferred Stock [Member]
Detail of Preferred Stock [Abstract]
Preferred Stock, Dividend Payment Rate, Variable	three-month LIBOR plus 3.77%
Preferred Stock, Dividend rate (percent)		7.98%
Preferred Stock, Liquidation preference per share (in dollars per share) | $ / shares	$ 1,000	$ 1,000
Preferred Stock, Shares authorized and designated | shares	3,500,000	3,500,000
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Shares issued and outstanding | shares	3,352,000	3,352,000
Preferred Stock, Liquidation Preference, Value	$ 3,352	$ 3,352
Carrying value	2,876	2,876
Discount	$ 476	$ 476
Series L - 7.50% Non-Cumulative Perpetual Convertible Class A Preferred Stock [Member]
Detail of Preferred Stock [Abstract]
Preferred Stock, Dividend rate (percent)	7.50%	7.50%
Preferred Stock, Liquidation preference per share (in dollars per share) | $ / shares	$ 1,000	$ 1,000
Preferred Stock, Shares authorized and designated | shares	4,025,000	4,025,000
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Shares issued and outstanding | shares	3,968,000	3,968,000
Preferred Stock, Liquidation Preference, Value	$ 3,968	$ 3,968
Carrying value	3,200	3,200
Discount	$ 768	$ 768
Series N - 5.20% Non-Cumulative Perpetual Class A Preferred Stock [Member]
Detail of Preferred Stock [Abstract]
Preferred Stock, Dividend rate (percent)	5.20%	5.20%
Preferred Stock, Liquidation preference per share (in dollars per share) | $ / shares	$ 25,000	$ 25,000
Preferred Stock, Shares authorized and designated | shares	30,000	30,000
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Shares issued and outstanding | shares	30,000	30,000
Preferred Stock, Liquidation Preference, Value	$ 750	$ 750
Carrying value	750	750
Discount	$ 0	$ 0
Series O - 5.125% Non-Cumulative Perpetual Class A Preferred Stock [Member]
Detail of Preferred Stock [Abstract]
Preferred Stock, Dividend rate (percent)	5.125%	5.125%
Preferred Stock, Liquidation preference per share (in dollars per share) | $ / shares	$ 25,000	$ 25,000
Preferred Stock, Shares authorized and designated | shares	27,600	27,600
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Shares issued and outstanding | shares	26,000	26,000
Preferred Stock, Liquidation Preference, Value	$ 650	$ 650
Carrying value	650	650
Discount	$ 0	$ 0
Series P - 5.25% Non-Cumulative Perpetual Class A Preferred Stock [Member]
Detail of Preferred Stock [Abstract]
Preferred Stock, Dividend rate (percent)	5.25%	5.25%
Preferred Stock, Liquidation preference per share (in dollars per share) | $ / shares	$ 25,000	$ 25,000
Preferred Stock, Shares authorized and designated | shares	26,400	26,400
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Shares issued and outstanding | shares	25,000	25,000
Preferred Stock, Liquidation Preference, Value	$ 625	$ 625
Carrying value	625	625
Discount	$ 0	$ 0
Series Q - 5.85% Fixed-to-Floating Non-Cumulative Perpetual Class A Preferred Stock [Member]
Detail of Preferred Stock [Abstract]
Preferred Stock, Dividend rate (percent)	5.85%	5.85%
Preferred Stock, Liquidation preference per share (in dollars per share) | $ / shares	$ 25,000	$ 25,000
Preferred Stock, Shares authorized and designated | shares	69,000	69,000
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Shares issued and outstanding | shares	69,000	69,000
Preferred Stock, Liquidation Preference, Value	$ 1,725	$ 1,725
Carrying value	1,725	1,725
Discount	$ 0	$ 0
Series R - 6.625% Fixed-to-Floating Non-Cumulative Perpetual Class A Preferred Stock [Member]
Detail of Preferred Stock [Abstract]
Preferred Stock, Dividend rate (percent)	6.625%	6.625%
Preferred Stock, Liquidation preference per share (in dollars per share) | $ / shares	$ 25,000	$ 25,000
Preferred Stock, Shares authorized and designated | shares	34,500	34,500
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Shares issued and outstanding | shares	33,600	33,600
Preferred Stock, Liquidation Preference, Value	$ 840	$ 840
Carrying value	840	840
Discount	$ 0	$ 0
Series S - 5.900% Fixed-to-Floating Non-Cumulative Perpetual Class A Preferred Stock [Member]
Detail of Preferred Stock [Abstract]
Preferred Stock, Dividend rate (percent)	5.90%	5.90%
Preferred Stock, Liquidation preference per share (in dollars per share) | $ / shares	$ 25,000	$ 25,000
Preferred Stock, Shares authorized and designated | shares	80,000	80,000
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Shares issued and outstanding | shares	80,000	80,000
Preferred Stock, Liquidation Preference, Value	$ 2,000	$ 2,000
Carrying value	2,000	2,000
Discount	$ 0	$ 0
Series T - 6.000% Non-Cumulative Perpetual Class A Preferred Stock [Member]
Detail of Preferred Stock [Abstract]
Preferred Stock, Dividend rate (percent)	6.00%	6.00%
Preferred Stock, Liquidation preference per share (in dollars per share) | $ / shares	$ 25,000	$ 25,000
Preferred Stock, Shares authorized and designated | shares	32,200	32,200
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Shares issued and outstanding | shares	32,000	32,000
Preferred Stock, Liquidation Preference, Value	$ 800	$ 800
Carrying value	800	800
Discount	$ 0	$ 0
Series U - 5.875% Fixed-to-Floating Non-Cumulative Perpetual Class A Preferred Stock [Member]
Detail of Preferred Stock [Abstract]
Preferred Stock, Dividend rate (percent)	5.875%	5.875%
Preferred Stock, Liquidation preference per share (in dollars per share) | $ / shares	$ 25,000	$ 25,000
Preferred Stock, Shares authorized and designated | shares	80,000	80,000
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Shares issued and outstanding | shares	80,000	80,000
Preferred Stock, Liquidation Preference, Value	$ 2,000	$ 2,000
Carrying value	2,000	2,000
Discount	$ 0	$ 0
Series V - 6.000% Non-Cumulative Perpetual Class A Preferred Stock [Member]
Detail of Preferred Stock [Abstract]
Preferred Stock, Dividend rate (percent)	6.00%	6.00%
Preferred Stock, Liquidation preference per share (in dollars per share) | $ / shares	$ 25,000	$ 25,000
Preferred Stock, Shares authorized and designated | shares	40,000	40,000
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Shares issued and outstanding | shares	40,000	40,000
Preferred Stock, Liquidation Preference, Value	$ 1,000	$ 1,000
Carrying value	1,000	1,000
Discount	$ 0	$ 0
Series W - 5.700% Non-Cumulative Perpetual Class A Preferred Stock [Member]
Detail of Preferred Stock [Abstract]
Preferred Stock, Dividend rate (percent)	5.70%	5.70%
Preferred Stock, Liquidation preference per share (in dollars per share) | $ / shares	$ 25,000	$ 25,000
Preferred Stock, Shares authorized and designated | shares	40,000	40,000
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Shares issued and outstanding | shares	40,000	40,000
Preferred Stock, Liquidation Preference, Value	$ 1,000	$ 1,000
Carrying value	1,000	1,000
Discount	$ 0	$ 0
Series X - 5.500% Non-Cumulative Perpetual Class A Preferred Stock [Member]
Detail of Preferred Stock [Abstract]
Preferred Stock, Dividend rate (percent)	5.50%	5.50%
Preferred Stock, Liquidation preference per share (in dollars per share) | $ / shares	$ 25,000	$ 25,000
Preferred Stock, Shares authorized and designated | shares	46,000	46,000
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Shares issued and outstanding | shares	46,000	46,000
Preferred Stock, Liquidation Preference, Value	$ 1,150	$ 1,150
Carrying value	1,150	1,150
Discount	$ 0	$ 0
Series Y - 5.625% Non-Cumulative Perpetual Class A Preferred Stock [Member]
Detail of Preferred Stock [Abstract]
Preferred Stock, Dividend rate (percent)	5.625%	5.625%
Preferred Stock, Liquidation preference per share (in dollars per share) | $ / shares	$ 25,000	$ 25,000
Preferred Stock, Shares authorized and designated | shares	27,600	27,600
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Shares issued and outstanding | shares	27,600	27,600
Preferred Stock, Liquidation Preference, Value	$ 690	$ 690
Carrying value	690	690
Discount	$ 0	$ 0

ESOP Preferred Stock (Details)

ESOP Preferred Stock (Details) - USD ($) $ / shares in Units, $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Class of Stock [Line Items]
Additional paid-in capital included related to preferred stock	$ 105	$ 122
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]
Shares issued and outstanding	1,674,596	1,556,104
Carrying value	$ 1,675	$ 1,556
Unearned ESOP shares	$ (1,780)	$ (1,678)
Employee Stock Ownership Plan Preferred Stock 2018 [Member]
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]
Shares issued and outstanding	605,081	0
Carrying value	$ 605	$ 0
Employee Stock Ownership Plan Preferred Stock 2018 [Member] | Minimum [Member]
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]
Adjustable dividend rate	7.00%
Employee Stock Ownership Plan Preferred Stock 2018 [Member] | Maximum [Member]
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]
Adjustable dividend rate	8.00%
Employee Stock Ownership Plan Preferred Stock 2017 [Member]
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]
Shares issued and outstanding	222,210	273,210
Carrying value	$ 222	$ 273
Employee Stock Ownership Plan Preferred Stock 2017 [Member] | Minimum [Member]
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]
Adjustable dividend rate	7.00%	7.00%
Employee Stock Ownership Plan Preferred Stock 2017 [Member] | Maximum [Member]
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]
Adjustable dividend rate	8.00%	8.00%
Employee Stock Ownership Plan Preferred Stock 2016 [Member]
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]
Shares issued and outstanding	233,835	322,826
Carrying value	$ 234	$ 323
Employee Stock Ownership Plan Preferred Stock 2016 [Member] | Minimum [Member]
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]
Adjustable dividend rate	9.30%	9.30%
Employee Stock Ownership Plan Preferred Stock 2016 [Member] | Maximum [Member]
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]
Adjustable dividend rate	10.30%	10.30%
Employee Stock Ownership Plan Preferred Stock 2015 [Member]
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]
Shares issued and outstanding	144,338	187,436
Carrying value	$ 144	$ 187
Employee Stock Ownership Plan Preferred Stock 2015 [Member] | Minimum [Member]
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]
Adjustable dividend rate	8.90%	8.90%
Employee Stock Ownership Plan Preferred Stock 2015 [Member] | Maximum [Member]
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]
Adjustable dividend rate	9.90%	9.90%
Employee Stock Ownership Plan Preferred Stock 2014 [Member]
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]
Shares issued and outstanding	174,151	237,151
Carrying value	$ 174	$ 237
Employee Stock Ownership Plan Preferred Stock 2014 [Member] | Minimum [Member]
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]
Adjustable dividend rate	8.70%	8.70%
Employee Stock Ownership Plan Preferred Stock 2014 [Member] | Maximum [Member]
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]
Adjustable dividend rate	9.70%	9.70%
Employee Stock Ownership Plan Preferred Stock 2013 [Member]
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]
Shares issued and outstanding	133,948	201,948
Carrying value	$ 134	$ 202
Employee Stock Ownership Plan Preferred Stock 2013 [Member] | Minimum [Member]
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]
Adjustable dividend rate	8.50%	8.50%
Employee Stock Ownership Plan Preferred Stock 2013 [Member] | Maximum [Member]
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]
Adjustable dividend rate	9.50%	9.50%
Employee Stock Ownership Plan Preferred Stock 2012 [Member]
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]
Shares issued and outstanding	77,634	128,634
Carrying value	$ 78	$ 129
Employee Stock Ownership Plan Preferred Stock 2012 [Member] | Minimum [Member]
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]
Adjustable dividend rate	10.00%	10.00%
Employee Stock Ownership Plan Preferred Stock 2012 [Member] | Maximum [Member]
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]
Adjustable dividend rate	11.00%	11.00%
Employee Stock Ownership Plan Preferred Stock 2011 [Member]
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]
Shares issued and outstanding	61,796	129,296
Carrying value	$ 62	$ 129
Employee Stock Ownership Plan Preferred Stock 2011 [Member] | Minimum [Member]
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]
Adjustable dividend rate	9.00%	9.00%
Employee Stock Ownership Plan Preferred Stock 2011 [Member] | Maximum [Member]
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]
Adjustable dividend rate	10.00%	10.00%
Employee Stock Ownership Plan Preferred Stock 2010 [Member]
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]
Shares issued and outstanding	21,603	75,603
Carrying value	$ 22	$ 76
Employee Stock Ownership Plan Preferred Stock 2010 [Member] | Minimum [Member]
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]
Adjustable dividend rate	9.50%	9.50%
Employee Stock Ownership Plan Preferred Stock 2010 [Member] | Maximum [Member]
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]
Adjustable dividend rate	10.50%	10.50%
Stock Compensation Plan [Member] | Convertible Preferred Stock [Member]
Class of Stock [Line Items]
Preferred stock, redemption price per share	$ 1,000

Revenue from Contracts with C_3

Revenue from Contracts with Customers, Revenue by Operating Segment (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017		Sep. 30, 2018	Sep. 30, 2017
Segment Reporting, Revenue Reconciling Item [Line Items]
Net interest income	$ 12,572	$ 12,449	[1]	$ 37,351	$ 37,244	[1]
Mortgage banking	846	1,046		2,550	3,422
Insurance	104	269		320	826
Net gains (losses) from trading activities (1)	158	120	[2]	592	543	[2]
Net gains (losses) on debt securities (1)	57	166		99	322
Net gains from equity securities (1)	416	363		1,494	1,207
Lease income	453	475		1,351	1,449
Other income of the segment (1)	633	199	[1]	1,720	1,045	[1]
Total noninterest income (2)	9,369	9,400	[1]	28,077	29,095	[1]
Revenue	21,941	21,849		65,428	66,339
Service charges on deposit accounts
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	1,204	1,276		3,540	3,865
Trust and investment fees
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	3,631	3,609		10,989	10,808
Brokerage advisory, commissions and other fees
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	2,334	2,304		7,091	6,957
Trust and investment management
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	835	840		2,520	2,506
Investment banking
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	462	465		1,378	1,345
Card fees
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	1,017	1,000		2,926	2,964
Other fees
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	850	877		2,496	2,644
Charges and fees on loans [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Other income of the segment (1)	298	318		903	950
Cash network fees [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	121	126		367	386
Commercial real estate brokerage commissions [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	129	120		323	303
Letters of credit fees [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Other income of the segment (1)	72	77		223	227
Wire transfer and other remittance fees [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	120	114		357	333
All other fees [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	110	122		323	445
Other [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Net interest income	(594)	(645)		(1,804)	(1,917)
Mortgage banking	1	2		5	5
Insurance	(12)	(12)		(33)	(36)
Net gains (losses) from trading activities (1)	0	0		0	0
Net gains (losses) on debt securities (1)	0	0		0	0
Net gains from equity securities (1)	0	0		0	0
Lease income	0	0		0	0
Other income of the segment (1)	(75)	(73)		(226)	(235)
Total noninterest income (2)	(811)	(786)		(2,419)	(2,341)
Revenue	(1,405)	(1,431)		(4,223)	(4,258)
Other [Member] | Service charges on deposit accounts
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	(4)	(4)		(12)	(12)
Other [Member] | Trust and investment fees
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	(718)	(695)		(2,142)	(2,051)
Other [Member] | Brokerage advisory, commissions and other fees
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	(483)	(463)		(1,442)	(1,372)
Other [Member] | Trust and investment management
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	(235)	(232)		(700)	(679)
Other [Member] | Investment banking
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	0	0		0	0
Other [Member] | Card fees
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	(1)	(1)		(3)	(3)
Other [Member] | Other fees
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	(2)	(3)		(8)	(9)
Other [Member] | Charges and fees on loans [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Other income of the segment (1)	0	(1)		(2)	(3)
Other [Member] | Cash network fees [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	0	0		0	0
Other [Member] | Commercial real estate brokerage commissions [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	0	0		0	0
Other [Member] | Letters of credit fees [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Other income of the segment (1)	(1)	(1)		(3)	(3)
Other [Member] | Wire transfer and other remittance fees [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	(1)	(1)		(3)	(3)
Other [Member] | All other fees [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	0	0		0	0
Community Banking [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Net interest income	7,338	7,154		21,879	21,419
Mortgage banking	747	937		2,284	3,081
Insurance	21	35		65	104
Net gains (losses) from trading activities (1)	10	(58)		33	(143)
Net gains (losses) on debt securities (1)	1	169		(1)	455
Net gains from equity securities (1)	274	270		1,367	960
Lease income	0	0		0	0
Other income of the segment (1)	772	330		2,115	1,406
Total noninterest income (2)	4,478	4,366		13,573	13,879
Revenue	11,816	11,520		35,452	35,298
Community Banking [Member] | Service charges on deposit accounts
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	700	739		1,971	2,206
Community Banking [Member] | Trust and investment fees
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	684	673		2,070	1,955
Community Banking [Member] | Brokerage advisory, commissions and other fees
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	470	461		1,413	1,357
Community Banking [Member] | Trust and investment management
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	231	225		684	658
Community Banking [Member] | Investment banking
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	(17)	(13)		(27)	(60)
Community Banking [Member] | Card fees
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	925	909		2,650	2,703
Community Banking [Member] | Other fees
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	344	362		1,019	1,152
Community Banking [Member] | Charges and fees on loans [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Other income of the segment (1)	65	72		208	235
Community Banking [Member] | Cash network fees [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	121	125		364	379
Community Banking [Member] | Commercial real estate brokerage commissions [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	0	1		0	1
Community Banking [Member] | Letters of credit fees [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Other income of the segment (1)	2	1		4	4
Community Banking [Member] | Wire transfer and other remittance fees [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	67	60		197	178
Community Banking [Member] | All other fees [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	89	103		246	355
Wholesale Banking [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Net interest income	4,726	4,763		13,951	14,253
Mortgage banking	101	110		269	343
Insurance	76	225		233	695
Net gains (losses) from trading activities (1)	135	157		514	615
Net gains (losses) on debt securities (1)	53	(5)		96	(135)
Net gains from equity securities (1)	50	40		232	92
Lease income	453	475		1,351	1,449
Other income of the segment (1)	(58)	(76)		(142)	(185)
Total noninterest income (2)	2,578	2,741		7,829	8,307
Revenue	7,304	7,504		21,780	22,560
Wholesale Banking [Member] | Service charges on deposit accounts
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	505	538		1,569	1,658
Wholesale Banking [Member] | Trust and investment fees
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	667	673		1,960	2,028
Wholesale Banking [Member] | Brokerage advisory, commissions and other fees
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	79	65		224	231
Wholesale Banking [Member] | Trust and investment management
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	112	129		335	390
Wholesale Banking [Member] | Investment banking
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	476	479		1,401	1,407
Wholesale Banking [Member] | Card fees
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	92	91		275	260
Wholesale Banking [Member] | Other fees
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	504	513		1,472	1,487
Wholesale Banking [Member] | Charges and fees on loans [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Other income of the segment (1)	233	246		695	715
Wholesale Banking [Member] | Cash network fees [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	0	1		3	7
Wholesale Banking [Member] | Commercial real estate brokerage commissions [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	129	119		323	302
Wholesale Banking [Member] | Letters of credit fees [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Other income of the segment (1)	70	76		219	223
Wholesale Banking [Member] | Wire transfer and other remittance fees [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	52	52		157	151
Wholesale Banking [Member] | All other fees [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	20	19		75	89
Wealth and Investment Management [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Net interest income	1,102	1,177		3,325	3,489
Mortgage banking	(3)	(3)		(8)	(7)
Insurance	19	21		55	63
Net gains (losses) from trading activities (1)	13	21		45	71
Net gains (losses) on debt securities (1)	3	2		4	2
Net gains from equity securities (1)	92	53		(105)	155
Lease income	0	0		0	0
Other income of the segment (1)	(6)	18		(27)	59
Total noninterest income (2)	3,124	3,079		9,094	9,250
Revenue	4,226	4,256		12,419	12,739
Wealth and Investment Management [Member] | Service charges on deposit accounts
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	3	3		12	13
Wealth and Investment Management [Member] | Trust and investment fees
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	2,998	2,958		9,101	8,876
Wealth and Investment Management [Member] | Brokerage advisory, commissions and other fees
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	2,268	2,241		6,896	6,741
Wealth and Investment Management [Member] | Trust and investment management
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	727	718		2,201	2,137
Wealth and Investment Management [Member] | Investment banking
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	3	(1)		4	(2)
Wealth and Investment Management [Member] | Card fees
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	1	1		4	4
Wealth and Investment Management [Member] | Other fees
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	4	5		13	14
Wealth and Investment Management [Member] | Charges and fees on loans [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Other income of the segment (1)	0	1		2	3
Wealth and Investment Management [Member] | Cash network fees [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	0	0		0	0
Wealth and Investment Management [Member] | Commercial real estate brokerage commissions [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	0	0		0	0
Wealth and Investment Management [Member] | Letters of credit fees [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Other income of the segment (1)	1	1		3	3
Wealth and Investment Management [Member] | Wire transfer and other remittance fees [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	2	3		6	7
Wealth and Investment Management [Member] | All other fees [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	$ 1	$ 0		$ 2	$ 1
[1]	(2)Financial information for the prior period has been revised to reflect the impact of the adoption of ASU 2017-12 – Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities, effective January 1, 2017.
[2]	(1)Financial information for the prior periods has been revised to reflect the impact of the adoption in first quarter 2018 of Accounting Standards Update (ASU) 2016-01 – Financial Instruments – Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities. See Note 1 (Summary of Significant Accounting Policies) for more information.

Revenue from Contracts with C_4

Revenue from Contracts with Customers, Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Service charges on deposit accounts
Disaggregation of Revenue [Line Items]
Fee income	$ 1,204	$ 1,276	$ 3,540	$ 3,865
Overdraft fees
Disaggregation of Revenue [Line Items]
Fee income	485	505	1,317	1,477
Account charges
Disaggregation of Revenue [Line Items]
Fee income	719	771	2,223	2,388
Brokerage advisory, commissions and other fees
Disaggregation of Revenue [Line Items]
Fee income	2,334	2,304	7,091	6,957
Asset-based revenue (1)
Disaggregation of Revenue [Line Items]
Fee income	1,720	1,669	5,185	4,911
Trailing commissions
Disaggregation of Revenue [Line Items]
Fee income	323	337	975	1,000
Transactional revenue
Disaggregation of Revenue [Line Items]
Fee income	395	428	1,246	1,373
Other revenue
Disaggregation of Revenue [Line Items]
Fee income	219	207	660	673
Trust and investment management
Disaggregation of Revenue [Line Items]
Fee income	835	840	2,520	2,506
Investment management fees
Disaggregation of Revenue [Line Items]
Fee income	520	508	1,585	1,527
Trust fees
Disaggregation of Revenue [Line Items]
Fee income	257	286	786	858
Other revenue
Disaggregation of Revenue [Line Items]
Fee income	58	46	149	121
Card fees
Disaggregation of Revenue [Line Items]
Fee income	1,017	1,000	2,926	2,964
Credit card interchange and network revenues (1)
Disaggregation of Revenue [Line Items]
Fee income	310	321	876	964
Credit card rewards and rebates
Disaggregation of Revenue [Line Items]
Other cost of revenue	(335)	(310)	(1,013)	(873)
Debit card interchange and network revenues
Disaggregation of Revenue [Line Items]
Fee income	523	496	1,527	1,459
Late fees, cash advance fees, balance transfer fees, and annual fees
Disaggregation of Revenue [Line Items]
Fee income	184	183	523	541
Other [Member] | Service charges on deposit accounts
Disaggregation of Revenue [Line Items]
Fee income	(4)	(4)	(12)	(12)
Other [Member] | Overdraft fees
Disaggregation of Revenue [Line Items]
Fee income	0	0	0	0
Other [Member] | Account charges
Disaggregation of Revenue [Line Items]
Fee income	(4)	(4)	(12)	(12)
Other [Member] | Brokerage advisory, commissions and other fees
Disaggregation of Revenue [Line Items]
Fee income	(483)	(463)	(1,442)	(1,372)
Other [Member] | Asset-based revenue (1)
Disaggregation of Revenue [Line Items]
Fee income	(372)	(347)	(1,108)	(1,012)
Other [Member] | Transactional revenue
Disaggregation of Revenue [Line Items]
Fee income	(94)	(95)	(286)	(303)
Other [Member] | Other revenue
Disaggregation of Revenue [Line Items]
Fee income	(17)	(21)	(48)	(57)
Other [Member] | Trust and investment management
Disaggregation of Revenue [Line Items]
Fee income	(235)	(232)	(700)	(679)
Other [Member] | Investment management fees
Disaggregation of Revenue [Line Items]
Fee income	0	0	0	0
Other [Member] | Trust fees
Disaggregation of Revenue [Line Items]
Fee income	(235)	(231)	(700)	(678)
Other [Member] | Other revenue
Disaggregation of Revenue [Line Items]
Fee income	0	(1)	0	(1)
Other [Member] | Card fees
Disaggregation of Revenue [Line Items]
Fee income	(1)	(1)	(3)	(3)
Other [Member] | Credit card interchange and network revenues (1)
Disaggregation of Revenue [Line Items]
Fee income	(1)	(1)	(3)	(3)
Other [Member] | Debit card interchange and network revenues
Disaggregation of Revenue [Line Items]
Fee income	0	0	0	0
Other [Member] | Late fees, cash advance fees, balance transfer fees, and annual fees
Disaggregation of Revenue [Line Items]
Fee income	0	0	0	0
Community Banking [Member] | Service charges on deposit accounts
Disaggregation of Revenue [Line Items]
Fee income	700	739	1,971	2,206
Community Banking [Member] | Overdraft fees
Disaggregation of Revenue [Line Items]
Fee income	484	503	1,312	1,471
Community Banking [Member] | Account charges
Disaggregation of Revenue [Line Items]
Fee income	216	236	659	735
Community Banking [Member] | Brokerage advisory, commissions and other fees
Disaggregation of Revenue [Line Items]
Fee income	470	461	1,413	1,357
Community Banking [Member] | Asset-based revenue (1)
Disaggregation of Revenue [Line Items]
Fee income	371	347	1,107	1,013
Community Banking [Member] | Transactional revenue
Disaggregation of Revenue [Line Items]
Fee income	82	93	258	287
Community Banking [Member] | Other revenue
Disaggregation of Revenue [Line Items]
Fee income	17	21	48	57
Community Banking [Member] | Trust and investment management
Disaggregation of Revenue [Line Items]
Fee income	231	225	684	658
Community Banking [Member] | Investment management fees
Disaggregation of Revenue [Line Items]
Fee income	0	0	0	2
Community Banking [Member] | Trust fees
Disaggregation of Revenue [Line Items]
Fee income	229	224	682	655
Community Banking [Member] | Other revenue
Disaggregation of Revenue [Line Items]
Fee income	2	1	2	1
Community Banking [Member] | Card fees
Disaggregation of Revenue [Line Items]
Fee income	925	909	2,650	2,703
Community Banking [Member] | Credit card interchange and network revenues (1)
Disaggregation of Revenue [Line Items]
Fee income	218	230	600	703
Community Banking [Member] | Debit card interchange and network revenues
Disaggregation of Revenue [Line Items]
Fee income	523	496	1,527	1,459
Community Banking [Member] | Late fees, cash advance fees, balance transfer fees, and annual fees
Disaggregation of Revenue [Line Items]
Fee income	184	183	523	541
Wholesale Banking [Member] | Service charges on deposit accounts
Disaggregation of Revenue [Line Items]
Fee income	505	538	1,569	1,658
Wholesale Banking [Member] | Overdraft fees
Disaggregation of Revenue [Line Items]
Fee income	1	2	4	5
Wholesale Banking [Member] | Account charges
Disaggregation of Revenue [Line Items]
Fee income	504	536	1,565	1,653
Wholesale Banking [Member] | Brokerage advisory, commissions and other fees
Disaggregation of Revenue [Line Items]
Fee income	79	65	224	231
Wholesale Banking [Member] | Asset-based revenue (1)
Disaggregation of Revenue [Line Items]
Fee income	1	0	1	0
Wholesale Banking [Member] | Transactional revenue
Disaggregation of Revenue [Line Items]
Fee income	19	9	47	33
Wholesale Banking [Member] | Other revenue
Disaggregation of Revenue [Line Items]
Fee income	59	56	176	198
Wholesale Banking [Member] | Trust and investment management
Disaggregation of Revenue [Line Items]
Fee income	112	129	335	390
Wholesale Banking [Member] | Investment management fees
Disaggregation of Revenue [Line Items]
Fee income	0	0	0	0
Wholesale Banking [Member] | Trust fees
Disaggregation of Revenue [Line Items]
Fee income	82	104	250	315
Wholesale Banking [Member] | Other revenue
Disaggregation of Revenue [Line Items]
Fee income	30	25	85	75
Wholesale Banking [Member] | Card fees
Disaggregation of Revenue [Line Items]
Fee income	92	91	275	260
Wholesale Banking [Member] | Credit card interchange and network revenues (1)
Disaggregation of Revenue [Line Items]
Fee income	92	91	275	260
Wholesale Banking [Member] | Debit card interchange and network revenues
Disaggregation of Revenue [Line Items]
Fee income	0	0	0	0
Wholesale Banking [Member] | Late fees, cash advance fees, balance transfer fees, and annual fees
Disaggregation of Revenue [Line Items]
Fee income	0	0	0	0
Wealth and Investment Management [Member] | Service charges on deposit accounts
Disaggregation of Revenue [Line Items]
Fee income	3	3	12	13
Wealth and Investment Management [Member] | Overdraft fees
Disaggregation of Revenue [Line Items]
Fee income	0	0	1	1
Wealth and Investment Management [Member] | Account charges
Disaggregation of Revenue [Line Items]
Fee income	3	3	11	12
Wealth and Investment Management [Member] | Brokerage advisory, commissions and other fees
Disaggregation of Revenue [Line Items]
Fee income	2,268	2,241	6,896	6,741
Wealth and Investment Management [Member] | Asset-based revenue (1)
Disaggregation of Revenue [Line Items]
Fee income	1,720	1,669	5,185	4,910
Wealth and Investment Management [Member] | Transactional revenue
Disaggregation of Revenue [Line Items]
Fee income	388	421	1,227	1,356
Wealth and Investment Management [Member] | Other revenue
Disaggregation of Revenue [Line Items]
Fee income	160	151	484	475
Wealth and Investment Management [Member] | Trust and investment management
Disaggregation of Revenue [Line Items]
Fee income	727	718	2,201	2,137
Wealth and Investment Management [Member] | Investment management fees
Disaggregation of Revenue [Line Items]
Fee income	520	508	1,585	1,525
Wealth and Investment Management [Member] | Trust fees
Disaggregation of Revenue [Line Items]
Fee income	181	189	554	566
Wealth and Investment Management [Member] | Other revenue
Disaggregation of Revenue [Line Items]
Fee income	26	21	62	46
Wealth and Investment Management [Member] | Card fees
Disaggregation of Revenue [Line Items]
Fee income	1	1	4	4
Wealth and Investment Management [Member] | Credit card interchange and network revenues (1)
Disaggregation of Revenue [Line Items]
Fee income	1	1	4	4
Wealth and Investment Management [Member] | Debit card interchange and network revenues
Disaggregation of Revenue [Line Items]
Fee income	0	0	0	0
Wealth and Investment Management [Member] | Late fees, cash advance fees, balance transfer fees, and annual fees
Disaggregation of Revenue [Line Items]
Fee income	$ 0	$ 0	$ 0	$ 0

Employee Benefits, Components o

Employee Benefits, Components of Net Periodic Benefit Cost (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		117 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018
Qualified Plan [Member]
Components of net periodic benefit cost [Abstract]
Service cost	$ 2	$ 1	$ 5	$ 4
Interest cost	97	103	293	309
Expected return on plan assets	(160)	(163)	(481)	(489)
Amortization of net actuarial loss (gain)	32	37	98	113
Amortization of prior service credit	0	0	0	0
Settlement loss	0	6	0	7
Net periodic benefit cost (income)	(29)	(16)	(85)	(56)
Nonqualified Plan [Member]
Components of net periodic benefit cost [Abstract]
Service cost	0	0	0	0
Interest cost	5	5	16	17
Expected return on plan assets	0	0	0	0
Amortization of net actuarial loss (gain)	4	3	10	9
Amortization of prior service credit	0	0	0	0
Settlement loss	0	0	3	6
Net periodic benefit cost (income)	9	8	29	32
Other benefits [Member]
Components of net periodic benefit cost [Abstract]
Service cost	0	0	0	0
Interest cost	6	7	16	21
Expected return on plan assets	(8)	(7)	(23)	(22)
Amortization of net actuarial loss (gain)	(4)	(3)	(13)	(8)
Amortization of prior service credit	(3)	(2)	(8)	(7)
Settlement loss	0	0	0	0
Net periodic benefit cost (income)	$ (9)	$ (5)	$ (28)	$ (16)
Cash Balance Plan [Member]
Components of net periodic benefit cost [Abstract]
Net periodic benefit cost (income)					$ 0

Earnings Per Common Share, Calc

Earnings Per Common Share, Calculation of Earnings and Diluted Earnings per Common Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended				9 Months Ended
	Sep. 30, 2018		Sep. 30, 2017		Sep. 30, 2018		Sep. 30, 2017
Earnings per Common Share, Basic and Diluted [Line items]
Stock Redeemed or Called During Period, Value	$ 2,150	[1]	$ 0	[1]	$ 2,150	[2]	$ 0	[2]
Earnings Per Common Share [Abstract]
Wells Fargo net income (1)	6,007		4,542	[3],[4]	16,329		16,032	[3],[4]
Less: Preferred stock dividends and other	554		411		1,351		1,218
Wells Fargo net income applicable to common stock (numerator)(1)	$ 5,453		$ 4,131	[4]	$ 14,978		$ 14,814	[4]
Earnings per common share
Average common shares outstanding (denominator)	4,784		4,948.6		4,844.8		4,982.1
Per share (1)	$ 1.14		$ 0.83	[4]	$ 3.09		$ 2.97	[4]
Diluted earnings per common share
Average common shares outstanding (in shares)	4,784		4,948.6		4,844.8		4,982.1
Diluted average common shares outstanding (denominator)	4,823.2		4,996.8		4,885		5,035.4
Per share (1)	$ 1.13		$ 0.83	[4]	$ 3.07		$ 2.94	[4]
Stock Option [Member]
Diluted earnings per common share
Weighted average number of diluted shares outstanding, adjustment (in shares)	7.5		15.8		8.5		18.1
Restricted Share Rights [Member]
Diluted earnings per common share
Weighted average number of diluted shares outstanding, adjustment (in shares)	26.5		22.4		25.9		24.1
Warrants [Member]
Diluted earnings per common share
Weighted average number of diluted shares outstanding, adjustment (in shares)	5.2		10		5.8		11.1
Series J [Member]
Earnings per Common Share, Basic and Diluted [Line items]
Stock Redeemed or Called During Period, Value	$ 155				$ 155
[1]	(2)Represents the impact of the redemption of preferred stock, series J, in third quarter 2018.
[2]	(3)Represents the impact of the redemption of preferred stock, series J, in third quarter 2018
[3]	(1)Financial information for the prior period has been revised to reflect the impact of the adoption of ASU 2017-12 – Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities, effective January 1, 2017.
[4]	(2)Financial information for the prior period has been revised to reflect the impact of the adoption of ASU 2017-12 – Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities, effective January 1, 2017.

Earnings Per Common Share, Anti

Earnings Per Common Share, Antidilutive Securities Excluded from the Calculation of Diluted Earnings per Common Share (Details) - shares shares in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Stock Option [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Instruments	0	1.8	0.4	2

Earnings Per Common Share Divid

Earnings Per Common Share Dividends Declared Per Common Shares (Details) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Earnings Per Share, Basic and Diluted, Other Disclosures [Abstract]
Dividends declared per common share (in dollars per share)	$ 0.430	$ 0.390	$ 1.210	$ 1.150

Other Comprehensive Income, Com

Other Comprehensive Income, Components of Other Comprehensive Income (Details) - USD ($) $ in Millions		3 Months Ended			9 Months Ended
		Sep. 30, 2018	Sep. 30, 2017		Sep. 30, 2018	Sep. 30, 2017
Debt securities (1):
Net unrealized gains (losses) arising during the period, Before tax	[1]	$ (1,468)	$ 891		$ (5,528)	$ 2,825
Net unrealized gains (losses) arising during the period, Tax effect		360	(353)		1,360	(1,075)
Net unrealized gains (losses) arising during the period, Net of tax		(1,108)	538		(4,168)	1,750
Reclassification of net (gains) losses to net income, Before tax	[1]	51	(200)		168	(522)
Reclassification of net (gains) losses to net income, Tax effect		(12)	77		(41)	193
Reclassification of net (gains) losses to net income, Net of tax		39	(123)		127	(329)
Net change, Before tax		(1,417)	691		(5,360)	2,303
Net change, Tax effect		348	(276)		1,319	(882)
Net change, Net of tax		(1,069)	415		(4,041)	1,421
Cash Flow Hedges:
Net unrealized gains (losses) arising during the period on cash flow hedges, Before Tax		(24)	104	[2]	(416)	18	[2]
Reclassification of net (gains) losses to net income on cash flow hedges, Before tax		79	(105)	[2]	216	(460)	[2]
Net change, Before tax		55	(1)		(200)	(442)
Net change, Tax effect		(14)	3		49	168
Net change, Net of tax		41	2		(151)	(274)
Defined benefit plans adjustments:
Net actuarial and prior service gains arising during the period, Before tax		0	11		6	4
Net actuarial and prior service gains arising during the period, Tax effect		0	(5)		(2)	(2)
Net actuarial and prior service gains arising during the period, Net of tax		0	6		4	2
Amortization of net actuarial loss, Before tax		32	37		95	114
Amortization of net actuarial loss, Tax effect		(8)	(13)		(23)	(43)
Amortization of net actuarial loss, Net of tax		24	24		72	71
Settlements and other, Before tax		(3)	4		(5)	6
Settlements and other, Tax effect		2	(1)		3	0
Settlements and other, Net of tax		(1)	3		(2)	6
Reclassification of amounts to net periodic benefit costs, Before tax		29	41		90	120
Reclassification of amounts to net periodic benefit costs, Tax effect		(6)	(14)		(20)	(43)
Reclassification of amounts to net periodic benefit costs, Net of tax		23	27		70	77
Net change, Before tax		29	52		96	124
Net change, Tax effect		(6)	(19)		(22)	(45)
Net change, Net of tax		23	33		74	79
Foreign currency translation adjustments:
Net unrealized gains (losses) arising during the period, Before tax		(9)	39		(94)	86
Net unrealized gains (losses) arising during the period, Tax effect		2	3		0	6
Net unrealized gains (losses) arising during the period, Net of tax		(7)	42		(94)	92
Net change, Before tax		(9)	39		(94)	86
Net change, Tax effect		2	3		0	6
Net change, Net of tax		(7)	42		(94)	92
Other comprehensive income (loss), before tax		(1,342)	781	[2]	(5,558)	2,071	[2]
Other comprehensive income (loss), tax effect		330	(289)	[2]	1,346	(753)	[2]
Other comprehensive income (loss), net of tax		(1,012)	492	[2],[3]	(4,212)	1,318	[2],[4]
Less: Other comprehensive loss from noncontrolling interests		0	(34)		(1)	(29)
Wells Fargo other comprehensive income (loss), net of tax		(1,012)	526	[2]	(4,211)	1,347	[2]
Cash Flow Hedging [Member]
Cash Flow Hedges:
Net unrealized gains (losses) arising during the period on cash flow hedges, Before Tax		(3)	32		(269)	272
Net unrealized gains (losses) arising during the period on cash flow hedges, Tax		0	(12)		66	(103)
Net unrealized gains (losses) arising during the period on cash flow hedges, Net of tax		(3)	20		(203)	169
Reclassification of net (gains) losses to net income on cash flow hedges, Before tax		79	(105)		216	(460)
Reclassification of net (gains) losses to net income on cash flow hedges, Tax effect		(19)	41		(53)	175
Reclassification of net (gains) losses to net income on cash flow hedges, Net of tax		60	(64)		163	(285)
Fair Value Hedging [Member]
Fair Value Hedges:
Change in fair value of excluded components on fair value hedges, Before Tax		(21)	72		(147)	(254)
Change in fair value of excluded components on fair value hedges, Tax		5	(26)		36	96
Change in fair value of excluded components on fair value hedges, Net of Tax		(16)	46		(111)	(158)
Interest expense on long-term debt [Member] | Cash Flow Hedging [Member]
Cash Flow Hedges:
Reclassification of net (gains) losses to net income on cash flow hedges, Before tax		1	2		1	8
Reclassification of net (gains) losses to net income on cash flow hedges, Tax effect		0	(1)		0	(3)
Reclassification of net (gains) losses to net income on cash flow hedges, Net of tax		1	1		1	5
Other noninterest income [Member]
Debt securities (1):
Reclassification of net (gains) losses to net income, Before tax		(1)	2		(1)	1
Reclassification of net (gains) losses to net income, Tax effect		0	0		0	0
Reclassification of net (gains) losses to net income, Net of tax		(1)	2		(1)	1
Debt securities [Member] | Interest income [Member]
Debt securities (1):
Reclassification of net (gains) losses to net income, Before tax		109	70		268	122
Reclassification of net (gains) losses to net income, Tax effect		(27)	(26)		(66)	(46)
Reclassification of net (gains) losses to net income, Net of tax		82	44		202	76
Debt securities [Member] | Net gains on debt securities [Member]
Debt securities (1):
Reclassification of net (gains) losses to net income, Before tax		(57)	(166)		(99)	(322)
Reclassification of net (gains) losses to net income, Tax effect		15	62		25	119
Reclassification of net (gains) losses to net income, Net of tax		(42)	(104)		(74)	(203)
Equity Securities | Net gains from equity securities [Member]
Debt securities (1):
Reclassification of net (gains) losses to net income, Before tax		0	(106)		0	(323)
Reclassification of net (gains) losses to net income, Tax effect		0	41		0	120
Reclassification of net (gains) losses to net income, Net of tax		0	(65)		0	(203)
Loans [Member] | Interest income [Member] | Cash Flow Hedging [Member]
Cash Flow Hedges:
Reclassification of net (gains) losses to net income on cash flow hedges, Before tax		78	(107)		215	(468)
Reclassification of net (gains) losses to net income on cash flow hedges, Tax effect		(19)	42		(53)	178
Reclassification of net (gains) losses to net income on cash flow hedges, Net of tax		$ 59	(65)		$ 162	(290)
Accounting Standards Update 2016-01 [Member]
Debt securities (1):
Net unrealized gains (losses) arising during the period, Before tax			(13)			113
Reclassification of net (gains) losses to net income, Before tax			$ (106)			$ (323)
[1]	(2)The quarter and nine months ended September 30, 2017, includes net unrealized gains (losses) arising during the period from equity securities of $(13) million and $113 million and reclassification of net (gains) losses to net income related to equity securities of $(106) million and $(323) million, respectively. With the adoption in first quarter 2018 of ASU 2016-01, the quarter and nine months ended September 30, 2018, reflects net unrealized gains (losses) arising during the period and reclassification of net (gains) losses to net income from only debt securities.
[2]	(1)Financial information for the prior period has been revised to reflect the impact of the adoption of ASU 2017-12 – Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities, effective January 1, 2017.
[3]	(3)Financial information for the prior period has been revised to reflect the impact of the adoption of ASU 2017-12 – Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities, effective January 1, 2017.
[4]	(5)Financial information for the prior period has been revised to reflect the impact of the adoption of ASU 2017-12 – Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities, effective January 1, 2017.

Other Comprehensive Income, Cum

Other Comprehensive Income, Cumulative OCI Balances (Details) - USD ($) $ in Millions		3 Months Ended			9 Months Ended
		Sep. 30, 2018	Sep. 30, 2017		Sep. 30, 2018	Sep. 30, 2017		Dec. 31, 2017	Dec. 31, 2016
Components of Other Comprehensive Income [Line Items]
Net unrealized gains (losses) arising during the period, Before tax	[1]	$ (1,468)	$ 891		$ (5,528)	$ 2,825
Reclassification of net (gains) losses to net income, Before tax	[1]	51	(200)		168	(522)
Cumulative OCI balances [Abstract]
Balance, beginning of period		206,069	205,949		208,079	200,497
Balance, beginning of period adjusted balance								$ 208,055	$ 200,284
Other comprehensive income (loss), net of tax (1)		(1,012)	492	[2],[3]	(4,212)	1,318	[2],[4]
Less: Other comprehensive income (loss) from noncontrolling interests		0	34		1	29
Balance, end of period		199,679	206,617	[3],[4]	199,679	206,617	[3],[4]
Accounting Standards Update 2016-01 [Member]
Components of Other Comprehensive Income [Line Items]
Net unrealized gains (losses) arising during the period, Before tax			(13)			113
Reclassification of net (gains) losses to net income, Before tax			(106)			(323)
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Transition Adjustment	[5]							(24)
Accounting Standards Update 2017-12 [Member]
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Transition Adjustment	[6]								(213)
Cumulative other comprehensive income [Member]
Cumulative OCI balances [Abstract]
Balance, beginning of period		(5,461)	(2,148)		(2,144)	(3,137)
Balance, beginning of period adjusted balance								(2,262)	(2,969)
Reclassification of certain tax effects to retained earnings		(400)			(400)
Net unrealized gains (losses) arising during the period		(1,134)	652		(4,572)	1,855
Amounts reclassified from accumulated other comprehensive income		122	(160)		360	(537)
Other comprehensive income (loss), net of tax (1)		(1,412)	492		(4,612)	1,318
Balance, end of period		(6,873)	(1,622)	[3],[4]	(6,873)	(1,622)	[3],[4]
Cumulative other comprehensive income [Member] | Accounting Standards Update 2016-01 [Member]
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Transition Adjustment	[5]							(118)
Cumulative other comprehensive income [Member] | Accounting Standards Update 2017-12 [Member]
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Transition Adjustment	[6]								168
Debt securities, parent [Member]
Cumulative OCI balances [Abstract]
Balance, beginning of period		(2,919)	(96)		171	(1,099)
Balance, beginning of period adjusted balance								53	(1,099)
Reclassification of certain tax effects to retained earnings		31			31
Net unrealized gains (losses) arising during the period		(1,108)	538		(4,168)	1,750
Amounts reclassified from accumulated other comprehensive income		39	(123)		127	(329)
Other comprehensive income (loss), net of tax (1)		(1,038)	415		(4,010)	1,421
Balance, end of period		(3,957)	353		(3,957)	353
Debt securities, parent [Member] | Accounting Standards Update 2016-01 [Member]
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Transition Adjustment								(118)
Derivative and hedging activities, parent [Member]
Cumulative OCI balances [Abstract]
Balance, beginning of period		(610)	(19)		(418)	89
Balance, beginning of period adjusted balance								(418)	257
Reclassification of certain tax effects to retained earnings		(87)			(87)
Net unrealized gains (losses) arising during the period		(19)	66		(314)	11
Amounts reclassified from accumulated other comprehensive income		60	(64)		163	(285)
Other comprehensive income (loss), net of tax (1)		(46)	2		(238)	(274)
Balance, end of period		(656)	(17)		(656)	(17)
Derivative and hedging activities, parent [Member] | Accounting Standards Update 2017-12 [Member]
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Transition Adjustment									168
Defined benefit plans adjustments, parent [Member]
Cumulative OCI balances [Abstract]
Balance, beginning of period		(1,757)	(1,897)		(1,808)	(1,943)
Balance, beginning of period adjusted balance								(1,808)	(1,943)
Reclassification of certain tax effects to retained earnings		(353)			(353)
Net unrealized gains (losses) arising during the period		0	6		4	2
Amounts reclassified from accumulated other comprehensive income		23	27		70	77
Other comprehensive income (loss), net of tax (1)		(330)	33		(279)	79
Balance, end of period		(2,087)	(1,864)		(2,087)	(1,864)
Foreign currency translation adjustments, parent [Member]
Cumulative OCI balances [Abstract]
Balance, beginning of period		(175)	(136)		(89)	(184)
Balance, beginning of period adjusted balance								(89)	(184)
Reclassification of certain tax effects to retained earnings		9			9
Net unrealized gains (losses) arising during the period		(7)	42		(94)	92
Amounts reclassified from accumulated other comprehensive income		0	0		0	0
Other comprehensive income (loss), net of tax (1)		2	42		(85)	92
Balance, end of period		(173)	(94)		(173)	(94)
Noncontrolling Interest [Member]
Cumulative OCI balances [Abstract]
Balance, beginning of period		881	915		1,143	916
Balance, beginning of period adjusted balance								$ 1,143	$ 916
Less: Other comprehensive income (loss) from noncontrolling interests		0	(34)	[3]	(1)	(29)	[4]
Balance, end of period		$ 938	895	[3],[4]	938	895	[3],[4]
AOCI Attributable to Noncontrolling Interest [Member]
Cumulative OCI balances [Abstract]
Less: Other comprehensive income (loss) from noncontrolling interests			(34)		(1)	(29)
Debt securities, noncontrolling interest [Member]
Cumulative OCI balances [Abstract]
Less: Other comprehensive income (loss) from noncontrolling interests			(34)		0	(31)
Derivative and hedging activities, noncontrolling interest [Member]
Cumulative OCI balances [Abstract]
Less: Other comprehensive income (loss) from noncontrolling interests			0		0	0
Defined benefit plans adjustments, noncontrolling interest [Member]
Cumulative OCI balances [Abstract]
Less: Other comprehensive income (loss) from noncontrolling interests			0		0	0
Foreign currency translation adjustments, noncontrolling interest [Member]
Cumulative OCI balances [Abstract]
Less: Other comprehensive income (loss) from noncontrolling interests			$ 0		$ (1)	$ 2
[1]	(2)The quarter and nine months ended September 30, 2017, includes net unrealized gains (losses) arising during the period from equity securities of $(13) million and $113 million and reclassification of net (gains) losses to net income related to equity securities of $(106) million and $(323) million, respectively. With the adoption in first quarter 2018 of ASU 2016-01, the quarter and nine months ended September 30, 2018, reflects net unrealized gains (losses) arising during the period and reclassification of net (gains) losses to net income from only debt securities.
[2]	(1)Financial information for the prior period has been revised to reflect the impact of the adoption of ASU 2017-12 – Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities, effective January 1, 2017.
[3]	(3)Financial information for the prior period has been revised to reflect the impact of the adoption of ASU 2017-12 – Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities, effective January 1, 2017.
[4]	(5)Financial information for the prior period has been revised to reflect the impact of the adoption of ASU 2017-12 – Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities, effective January 1, 2017.
[5]	Effective January 1, 2018, we adopted ASU 2016-04 – Liabilities – Extinguishments of Liabilities (Subtopic 405-20): Recognition of Breakage for Certain Prepaid Stored-Value Products, ASU 2016-01 – Financial Instruments – Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities, and ASU 2014-09 – Revenue from Contracts With Customers (Topic 606) and subsequent related Updates. See Note 1 (Summary of Significant Accounting Policies) in this Report for more information.
[6]	Effective January 1, 2017, we adopted changes in hedge accounting pursuant to ASU 2017-12 – Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities.

Operating Segments (Details)

Operating Segments (Details) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2018USD ($)	Sep. 30, 2017USD ($)		Sep. 30, 2018USD ($)segment	Sep. 30, 2017USD ($)
Segment Reporting Information [Line Items]
Number of reportable operating segments | segment				3
Financial Information of Operating Segment [Abstract]
Net interest income	$ 12,572	$ 12,449	[1]	$ 37,351	$ 37,244	[1]
Provision (reversal of provision) for credit losses	580	717		1,223	1,877
Noninterest income	9,369	9,400	[1]	28,077	29,095	[1]
Noninterest expense	13,763	14,351		42,787	41,684
Income before income tax expense (2)	7,598	6,781	[1]	21,418	22,778	[1]
Income tax expense (benefit)	1,512	2,181	[1]	4,696	6,559	[1]
Net income before noncontrolling interests (2)	6,086	4,600	[1],[2]	16,722	16,219	[1],[3],[4]
Less: Net income from noncontrolling interests	79	58		393	187
Wells Fargo net income (1)	6,007	4,542	[1],[5]	16,329	16,032	[1],[5]
Average loans	939,500	952,300		944,800	957,600
Average assets	1,876,300	1,938,500		1,892,200	1,932,200
Average Deposits	1,266,400	1,306,400		1,278,200	1,302,300
Other [Member]
Financial Information of Operating Segment [Abstract]
Net interest income	(594)	(645)		(1,804)	(1,917)
Provision (reversal of provision) for credit losses	1	(1)		6	(5)
Noninterest income	(811)	(786)		(2,419)	(2,341)
Noninterest expense	(882)	(837)		(2,698)	(2,529)
Income before income tax expense (2)	(524)	(593)		(1,531)	(1,724)
Income tax expense (benefit)	(132)	(225)		(383)	(654)
Net income before noncontrolling interests (2)	(392)	(368)		(1,148)	(1,070)
Less: Net income from noncontrolling interests	0	0		0	0
Wells Fargo net income (1)	(392)	(368)		(1,148)	(1,070)
Average loans	(58,800)	(57,500)		(58,800)	(56,800)
Average assets	(59,600)	(58,500)		(59,600)	(57,800)
Average Deposits	(67,900)	(76,000)		(70,800)	(78,800)
Community Banking [Member]
Financial Information of Operating Segment [Abstract]
Net interest income	7,338	7,154		21,879	21,419
Provision (reversal of provision) for credit losses	547	650		1,249	1,919
Noninterest income	4,478	4,366		13,573	13,879
Noninterest expense	7,467	7,852		23,459	22,399
Income before income tax expense (2)	3,802	3,018		10,744	10,980
Income tax expense (benefit)	925	1,079		3,147	3,316
Net income before noncontrolling interests (2)	2,877	1,939		7,597	7,664
Less: Net income from noncontrolling interests	61	62		372	198
Wells Fargo net income (1)	2,816	1,877		7,225	7,466
Average loans	460,900	473,700		465,000	476,500
Average assets	1,024,900	1,089,600		1,040,200	1,089,600
Average Deposits	760,900	734,600		756,400	726,800
Wholesale Banking [Member]
Financial Information of Operating Segment [Abstract]
Net interest income	4,726	4,763		13,951	14,253
Provision (reversal of provision) for credit losses	26	69		(30)	(39)
Noninterest income	2,578	2,741		7,829	8,307
Noninterest expense	3,935	4,234		12,132	12,437
Income before income tax expense (2)	3,343	3,201		9,678	10,162
Income tax expense (benefit)	475	894		1,302	2,642
Net income before noncontrolling interests (2)	2,868	2,307		8,376	7,520
Less: Net income from noncontrolling interests	17	(7)		15	(21)
Wells Fargo net income (1)	2,851	2,314		8,361	7,541
Average loans	462,800	463,700		464,200	466,300
Average assets	827,200	824,200		827,600	817,900
Average Deposits	413,600	463,400		424,400	463,700
Wealth and Investment Management [Member]
Financial Information of Operating Segment [Abstract]
Net interest income	1,102	1,177		3,325	3,489
Provision (reversal of provision) for credit losses	6	(1)		(2)	2
Noninterest income	3,124	3,079		9,094	9,250
Noninterest expense	3,243	3,102		9,894	9,377
Income before income tax expense (2)	977	1,155		2,527	3,360
Income tax expense (benefit)	244	433		630	1,255
Net income before noncontrolling interests (2)	733	722		1,897	2,105
Less: Net income from noncontrolling interests	1	3		6	10
Wells Fargo net income (1)	732	719		1,891	2,095
Average loans	74,600	72,400		74,400	71,600
Average assets	83,800	83,200		84,000	82,500
Average Deposits	$ 159,800	$ 184,400		$ 168,200	$ 190,600
[1]	(2)Financial information for the prior period has been revised to reflect the impact of the adoption of ASU 2017-12 – Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities, effective January 1, 2017.
[2]	(3)Financial information for the prior period has been revised to reflect the impact of the adoption of ASU 2017-12 – Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities, effective January 1, 2017.
[3]	(2)Financial information for the prior period has been revised to reflect the impact of the adoption of ASU 2017-12 – Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities, effective January 1, 2017.
[4]	(5)Financial information for the prior period has been revised to reflect the impact of the adoption of ASU 2017-12 – Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities, effective January 1, 2017.
[5]	(1)Financial information for the prior period has been revised to reflect the impact of the adoption of ASU 2017-12 – Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities, effective January 1, 2017.

Regulatory and Agency Capital_3

Regulatory and Agency Capital Requirements (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Wells Fargo & Company [Member] | Advanced Approach Under Basel III [Member]
Regulatory capital:
Common equity tier 1	$ 148,855	$ 154,765
Tier 1	170,342	178,209
Total	201,616	210,333
Assets:
Risk-weighted	1,189,464	1,199,545
Adjusted average	$ 1,847,338	$ 1,905,568
Regulatory capital ratios:
Common equity tier 1 capital	12.51%	12.90%
Tier 1 capital	14.32%	14.86%
Total capital	16.95%	17.53%
Tier 1 leverage	9.22%	9.35%
Wells Fargo & Company [Member] | Standardized Approach Under Basel III [Member]
Regulatory capital:
Common equity tier 1	$ 148,855	$ 154,765
Tier 1	170,342	178,209
Total	209,924	220,097
Assets:
Risk-weighted	1,250,215	1,260,663
Adjusted average	$ 1,847,338	$ 1,905,568
Regulatory capital ratios:
Common equity tier 1 capital	11.91%	12.28%
Tier 1 capital	13.63%	14.14%
Total capital	16.79%	17.46%
Tier 1 leverage	9.22%	9.35%
Wells Fargo Bank, NA [Member] | Advanced Approach Under Basel III [Member]
Regulatory capital:
Common equity tier 1	$ 141,459	$ 143,292
Tier 1	141,459	143,292
Total	154,468	156,661
Assets:
Risk-weighted	1,082,515	1,090,360
Adjusted average	$ 1,647,541	$ 1,708,828
Regulatory capital ratios:
Common equity tier 1 capital	13.07%	13.14%
Tier 1 capital	13.07%	13.14%
Total capital	14.27%	14.37%
Tier 1 leverage	8.59%	8.39%
Wells Fargo Bank, NA [Member] | Standardized Approach Under Basel III [Member]
Regulatory capital:
Common equity tier 1	$ 141,459	$ 143,292
Tier 1	141,459	143,292
Total	162,353	165,734
Assets:
Risk-weighted	1,162,179	1,169,863
Adjusted average	$ 1,647,541	$ 1,708,828
Regulatory capital ratios:
Common equity tier 1 capital	12.17%	12.25%
Tier 1 capital	12.17%	12.25%
Total capital	13.97%	14.17%
Tier 1 leverage	8.59%	8.39%

Regulatory and Agency Capital_4

Regulatory and Agency Capital Requirements Minimum Required Regulatory Capital Ratios – Transition Requirements (Details)	Sep. 30, 2018	Dec. 31, 2017
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Capital Conservation Buffer	1.875%
GSIB Surcharge	1.50%
Parent Company [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Tier One Risk Based Common Equity Required for Capital Adequacy to Risk Weighted Assets	7.875%	6.75%
Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets	9.375%	8.25%
Capital Required for Capital Adequacy to Risk Weighted Assets	11.375%	10.25%
Tier One Leverage Capital Required for Capital Adequacy to Average Assets	4.00%	4.00%
Wells Fargo Bank, NA [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Tier One Risk Based Common Equity Required for Capital Adequacy to Risk Weighted Assets	6.375%	5.75%
Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets	7.875%	7.25%
Capital Required for Capital Adequacy to Risk Weighted Assets	9.875%	9.25%
Tier One Leverage Capital Required for Capital Adequacy to Average Assets	4.00%	4.00%