Wells Fargo & Company (WFC) 10-K 27 Feb 19 2018 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Feb. 18, 2019	Jun. 30, 2018
Document and Entity Information [Abstract]
Entity Registrant Name	WELLS FARGO & COMPANY/MN
Entity Central Index Key	72,971
Document Type	10-K
Document Period End Date	Dec. 31, 2018
Amendment Flag	false
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	FY
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Common Stock, Shares Outstanding		4,549,421,815
Entity Public Float			$ 268,200
Entity Shell Company	false

Consolidated Statement of Incom

Consolidated Statement of Income - USD ($) shares in Millions, $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017		Dec. 31, 2016
Interest income
Debt securities (1)		$ 14,406	$ 12,946	[1]	$ 11,244	[1]
Mortgage loans held for sale		777	786		784
Loans held for sale (1)		140	50	[1]	38	[1]
Loans		43,974	41,388		39,505
Equity securities (1)		992	799	[1]	635	[1]
Other interest income (1)		4,358	2,940	[1]	1,457	[1]
Total interest income		64,647	58,909		53,663
Interest expense
Deposits		5,622	3,013		1,395
Short-term borrowings		1,717	758		330
Long-term debt		6,703	5,157		3,830
Other interest expense		610	424		354
Total interest expense		14,652	9,352		5,909
Net interest income		49,995	49,557		47,754
Provision for credit losses		1,744	2,528		3,770
Net interest income after provision for credit losses		48,251	47,029		43,984
Noninterest income
Mortgage banking		3,017	4,350		6,096
Insurance		429	1,049		1,268
Net gains from trading activities (1)		602	542	[1]	610	[1]
Net gains on debt securities (2)	[2]	108	479		942
Net gains from equity securities (1)(3)	[3]	1,515	1,779	[1]	1,103	[1]
Lease income		1,753	1,907		1,927
Other		2,473	1,603		1,289
Total noninterest income		36,413	38,832		40,513
Noninterest expense
Salaries		17,834	17,363		16,552
Commission and incentive compensation		10,264	10,442		10,247
Employee benefits		4,926	5,566		5,094
Equipment		2,444	2,237		2,154
Net occupancy		2,888	2,849		2,855
Core deposit and other intangibles		1,058	1,152		1,192
FDIC and other deposit assessments		1,110	1,287		1,168
Other		15,602	17,588		13,115
Total noninterest expense		56,126	58,484		52,377
Income before income tax expense		28,538	27,377		32,120
Income tax expense		5,662	4,917		10,075
Net income before noncontrolling interests		22,876	22,460		22,045
Less: Net income from noncontrolling interests		483	277		107
Wells Fargo net income		22,393	22,183		21,938
Less: Preferred stock dividends and other		1,704	1,629		1,565
Wells Fargo net income applicable to common stock		$ 20,689	$ 20,554		$ 20,373
Per share information
Earnings per common share (in dollars per share)		$ 4.31	$ 4.14		$ 4.03
Diluted earnings per common share (in dollars per share)		$ 4.28	$ 4.10		$ 3.99
Average common shares outstanding (in shares)		4,799.7	4,964.6		5,052.8
Diluted average common shares outstanding (in shares)		4,838.4	5,017.3		5,108.3
Service charges on deposit accounts
Noninterest income
Fee income		$ 4,716	$ 5,111		$ 5,372
Trust and investment fees
Noninterest income
Fee income		14,509	14,495		14,243
Card fees
Noninterest income
Fee income		3,907	3,960		3,936
Other fees
Noninterest income
Fee income		$ 3,384	$ 3,557		$ 3,727
[1]	(1)Financial information for the prior periods has been revised to reflect presentation changes made in connection with our 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)Total other-than-temporary impairment (OTTI) losses were $17 million, $205 million and $207 million for the years ended December 31, 2018, 2017 and 2016, respectively. Of total OTTI, losses of $28 million, $262 million and $189 million were recognized in earnings, and losses (reversal of losses) of $(11) million, $(57) million and $18 million were recognized as non-credit-related OTTI in other comprehensive income for the years ended December 31, 2018, 2017 and 2016, respectively.
[3]	(3)Includes OTTI losses of $352 million, $344 million and $453 million for the years ended December 31, 2018, 2017 and 2016, respectively.

Consolidated Statement of Inc_2

Consolidated Statement of Income (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Noninterest income
Total OTTI losses recorded on equity securities	$ 352	$ 344	$ 453
Debt securities [Member]
Noninterest income
Total OTTI losses recorded on debt securities	17	205	207
Total OTTI recorded as part of gross realized losses	28	262	189
Total reversal of losses recognized in OCI as non-credit-related impairment	$ (11)	$ (57)	$ 18

Consolidated Statement of Compr

Consolidated Statement of Comprehensive Income - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement of Comprehensive Income [Abstract]
Wells Fargo net income		$ 22,393	$ 22,183	$ 21,938
Debt securities (1):
Net unrealized gains (losses) arising during the period	[1]	(4,493)	2,719	(3,458)
Reclassification of net (gains) losses to net income	[1]	248	(737)	(1,240)
Derivatives and hedging activities:
Net unrealized gains (losses) arising during the period		(532)	(540)	177
Reclassification of net (gains) losses on cash flow hedges to net income		294	(543)	(1,029)
Defined benefit plans adjustments:
Net actuarial and prior service gains (losses) arising during the period		(434)	49	(52)
Amortization of net actuarial loss, settlements and other to net income		253	153	158
Foreign currency translation adjustments:
Net unrealized gains (losses) arising during the period		(156)	96	(3)
Other comprehensive income (loss), before tax		(4,820)	1,197	(5,447)
Income tax benefit (expense) related to other comprehensive income		1,144	(434)	1,996
Other comprehensive income (loss), net of tax		(3,676)	763	(3,451)
Less: Other comprehensive loss from noncontrolling interests		(2)	(62)	(17)
Wells Fargo other comprehensive income (loss), net of tax		(3,674)	825	(3,434)
Wells Fargo comprehensive income		18,719	23,008	18,504
Comprehensive income from noncontrolling interests		481	215	90
Total comprehensive income		$ 19,200	$ 23,223	$ 18,594
[1]	(1)The year ended December 31, 2017, and December 31, 2016, includes net unrealized gains (losses) arising during the period from equity securities of $81 million and $259 million and reclassification of net (gains) losses to net income related to equity securities of $(456) million and $(300) million, respectively. In connection with our adoption in first quarter 2018 of ASU 2016-01, the year ended December 31, 2018, reflects net unrealized gains (losses) arising during the period and reclassification of net (gains) losses to net income from only debt securities.

Consolidated Statement of Com_2

Consolidated Statement of Comprehensive Income Consolidated Statement of Comprehensive Income (Unaudited) (Parenthetical) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Net unrealized gains (losses) arising during the period, Before tax	[1]	$ (4,493)	$ 2,719	$ (3,458)
Reclassification of net (gains) losses to net income, Before tax	[1]	$ 248	(737)	(1,240)
Accounting Standards Update 2016-01 [Member]
Net unrealized gains (losses) arising during the period, Before tax			81	259
Reclassification of net (gains) losses to net income, Before tax			$ (456)	$ (300)
[1]	(1)The year ended December 31, 2017, and December 31, 2016, includes net unrealized gains (losses) arising during the period from equity securities of $81 million and $259 million and reclassification of net (gains) losses to net income related to equity securities of $(456) million and $(300) million, respectively. In connection with our adoption in first quarter 2018 of ASU 2016-01, the year ended December 31, 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

Consolidated Balance Sheet - USD ($) $ in Millions		Dec. 31, 2018	Dec. 31, 2017
Assets
Cash and due from banks		$ 23,551	$ 23,367
Interest-earning deposits with banks (1)		149,736	192,580	[1]
Total cash, cash equivalents, and restricted cash (1)		173,287	215,947	[1],[2]
Federal funds sold and securities purchased under resale agreements (1)		80,207	80,025	[1]
Debt securities:
Trading, at fair value (2)		69,989	57,624	[3]
Available-for-sale, at fair value (2)		269,912	276,407	[3]
Held-to-maturity, at cost (fair value $142,115 and $138,985)		144,788	139,335
Mortgages held for sale (includes $16,116 and $22,042 carried at fair value)	[4]	15,126	20,070
Loans held for sale		2,041	1,131	[3]
Loans (includes $376 and $758 carried at fair value)	[4]	953,110	956,770
Allowance for loan losses		(9,775)	(11,004)
Net loans		943,335	945,766
Mortgage servicing rights:
Measured at fair value		14,649	13,625
Amortized		1,443	1,424
Premises and equipment, net		8,920	8,847
Goodwill		26,418	26,587
Derivative assets		10,770	12,228
Equity securities		55,148	62,497	[3]
Other assets (includes $4,867 and $3,275 carried at fair value)		79,850	90,244	[3]
Total assets	[5]	1,895,883	1,951,757
Liabilities
Noninterest-bearing deposits		349,534	373,722
Interest-bearing deposits		936,636	962,269
Total deposits		1,286,170	1,335,991
Short-term borrowings		105,787	103,256
Derivative liabilities		8,499	8,796
Accrued expenses and other liabilities		69,317	70,615
Long-term debt		229,044	225,020
Total liabilities	[6]	1,698,817	1,743,678
Wells Fargo stockholders’ equity:
Preferred stock		23,214	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		60,685	60,893
Retained earnings		158,163	145,263
Cumulative other comprehensive income (loss)		(6,336)	(2,144)
Treasury stock – 900,557,866 shares and 590,194,846 shares		(47,194)	(29,892)
Unearned ESOP shares		(1,502)	(1,678)
Total Wells Fargo stockholders’ equity		196,166	206,936
Noncontrolling interests		900	1,143
Total equity		197,066	208,079
Total liabilities and equity		$ 1,895,883	$ 1,951,757
[1]	(1)Financial information has been revised to reflect the impact of our 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 has been revised to reflect the impact of our 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.
[3]	(2)Financial information for the prior period has been revised to reflect presentation changes in connection with our 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.
[4]	(3)Parenthetical amounts represent assets and liabilities that we are required to carry at fair value or have elected the fair value option.
[5]	(4)Our consolidated assets at December 31, 2018 and 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, $139 million and $116 million; Interest-bearing deposits with banks, $8 million and $371 million; Debt securities, $45 million and $0 million; Net loans, $13.6 billion and $12.5 billion; Derivative assets, $0 million and $0 million; Equity securities, $85 million and $306 million; Other assets, $221 million and $342 million; and Total assets, $14.1 billion and $13.6 billion, respectively.
[6]	$221 million and $342 million; and Total assets, $14.1 billion and $13.6 billion, respectively.(5)Our consolidated liabilities at December 31, 2018 and 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, $191 million and $132 million; Long-term debt, $816 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		Dec. 31, 2018	Dec. 31, 2017
Assets
Held-to-maturity, at fair value		$ 142,115	$ 138,985
Mortgage loans held for sale, carried at fair value	[1]	11,771	16,116
Loans Held-for-sale, Fair Value Disclosure		1,469	1,023	[2]
Loans, carried at fair value	[1]	244	376
Equity securities, carried at fair value		29,556	39,227	[2]
Cash and due from banks		23,551	23,367
Interest-earning deposits with banks (1)		149,736	192,580	[3]
Net loans		943,335	945,766
Derivative assets		10,770	12,228
Equity securities		55,148	62,497	[2]
Other assets (includes $4,867 and $3,275 carried at fair value)		79,850	90,244	[2]
Total assets	[4]	1,895,883	1,951,757
Liabilities
Derivative liabilities		8,499	8,796
Accrued expenses and other liabilities		69,317	70,615
Long-term debt		229,044	225,020
Total liabilities	[5]	$ 1,698,817	$ 1,743,678
Wells Fargo stockholders’ equity:
Common stock, par value		$ 1.666602371	$ 1.666602371
Common stock, shares authorized		9,000,000,000	9,000,000,000
Common stock, shares issued		5,481,811,474	5,481,811,474
Treasury stock, shares		900,557,866	590,194,846
VIEs that we consolidate [Member]
Assets
Cash and due from banks		$ 139	$ 116
Interest-earning deposits with banks (1)		8	371
Debt securities		45	0
Net loans	[1]	13,600	12,500
Derivative assets		0	0
Equity securities		85	306
Other assets (includes $4,867 and $3,275 carried at fair value)		221	342
Total assets		14,062	13,617
Liabilities
Derivative liabilities		0	5
Accrued expenses and other liabilities		191	132
Long-term debt		816	1,479
Total liabilities		$ 1,007	$ 1,616
[1]	(3)Parenthetical amounts represent assets and liabilities that we are required to carry at fair value or have elected the fair value option.
[2]	(2)Financial information for the prior period has been revised to reflect presentation changes in connection with our 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]	(1)Financial information has been revised to reflect the impact of our 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.
[4]	(4)Our consolidated assets at December 31, 2018 and 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, $139 million and $116 million; Interest-bearing deposits with banks, $8 million and $371 million; Debt securities, $45 million and $0 million; Net loans, $13.6 billion and $12.5 billion; Derivative assets, $0 million and $0 million; Equity securities, $85 million and $306 million; Other assets, $221 million and $342 million; and Total assets, $14.1 billion and $13.6 billion, respectively.
[5]	$221 million and $342 million; and Total assets, $14.1 billion and $13.6 billion, respectively.(5)Our consolidated liabilities at December 31, 2018 and 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, $191 million and $132 million; Long-term debt, $816 million and $1.5 billion; and Total liabilities, $1.0 billion and $1.6 billion, respectively.

Consolidated Statement of Chang

Consolidated Statement of Changes in Equity - 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 from change in accounting principle | Accounting Standards Update 2015-02 [Member]	[1]	$ 121									$ 121
Balance, beginning of period adjusted balance		194,012	$ 192,998	$ 22,214	$ 9,136	$ 60,714	$ 120,866	$ 297	$ (18,867)	$ (1,362)	1,014
Balance, beginning of period at Dec. 31, 2015		193,891	192,998	$ 22,214	$ 9,136	60,714	120,866	297	(18,867)	(1,362)	893
Beginning balance, shares at Dec. 31, 2015				11,259,917	5,092,128,810
Stockholders' Equity Period Increase (Decrease)
Net income		21,938	21,938				21,938
Net income attributable to noncontrolling interests		(107)									107
Net income		22,045
Other comprehensive income (loss) attributable to parent, net of tax		(3,434)	(3,434)					(3,434)
Other comprehensive income (loss) attributable to noncontrolling interest, net of tax		17									(17)
Other comprehensive income (loss), net of tax		(3,451)						(3,451)
Noncontrolling interests, adjustments to Additional Paid in Capital			2			2
Noncontrolling interests											(188)
Total change in noncontrolling interests		(186)
Common stock issued		2,386	2,386			(203)	(451)		3,040
Common stock, shares issued					63,441,805
Common stock repurchased	[2]	(8,116)	(8,116)			(250)			(7,866)
Common stock repurchased, shares	[2]				(159,647,152)
Preferred stock issued to ESOP		0	0	$ 1,150		99				(1,249)
Preferred stock issued to ESOP, shares				1,150,000
Preferred stock released by ESOP		963	963			(83)				1,046
Preferred stock converted to common shares		0	0	$ (963)		(11)			974
Preferred stock converted to common shares, shares				(963,205)	20,185,863
Common stock warrants repurchased/exercised		(17)	(17)			(17)
Preferred stock issued		2,101	2,101	$ 2,150		(49)
Preferred stock, shares issued				86,000
Common stock dividends		(7,661)	(7,661)			51	(7,712)
Preferred stock dividends		(1,566)	(1,566)				(1,566)
Tax benefit from stock incentive compensation		277	277			277
Stock incentive compensation expense		779	779			779
Net change in deferred compensation and related plans		(1,069)	(1,069)			(1,075)			6
Net change		6,485	6,583	$ 2,337	$ 0	(480)	12,209	(3,434)	(3,846)	(203)	(98)
Net change, shares				272,795	(76,019,484)
Balance, end 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
Ending balance, shares at Dec. 31, 2016				11,532,712	5,016,109,326
Stockholders' Equity Period Increase (Decrease)
Cumulative effect from change in accounting principle | Accounting Standards Update 2017-12 [Member]	[3]	(213)	(213)				(381)	168
Balance, beginning of period adjusted balance		200,284	199,368	$ 24,551	$ 9,136	60,234	132,694	(2,969)	(22,713)	(1,565)	916
Net income		22,183	22,183				22,183
Net income attributable to noncontrolling interests		(277)									277
Net income		22,460
Other comprehensive income (loss) attributable to parent, net of tax		825	825					825
Other comprehensive income (loss) attributable to noncontrolling interest, net of tax		62									(62)
Other comprehensive income (loss), net of tax		763						763
Noncontrolling interests, adjustments to Additional Paid in Capital			0			0
Noncontrolling interests											12
Total change in noncontrolling interests		12
Common stock issued		2,348	2,348			(133)	(277)		2,758
Common stock, shares issued					57,257,564
Common stock repurchased	[2]	(9,908)	(9,908)			750			(10,658)
Common stock repurchased, shares	[2]				(196,519,707)
Preferred stock issued to ESOP		0	0	$ 950		31				(981)
Preferred stock issued to ESOP, shares				950,000
Preferred stock released by ESOP		833	833			(35)				868
Preferred stock converted to common shares		0	0	$ (833)		97			736
Preferred stock converted to common shares, shares				(833,077)	14,769,445
Common stock warrants repurchased/exercised		(133)	(133)			(133)
Preferred stock issued		677	677	$ 690		(13)
Preferred stock, shares issued				27,600
Common stock dividends		(7,658)	(7,658)			50	(7,708)
Preferred stock dividends		(1,629)	(1,629)				(1,629)
Tax benefit from stock incentive compensation		0	0			0
Stock incentive compensation expense		875	875			875
Net change in deferred compensation and related plans		(845)	(845)			(830)			(15)
Net change		7,795	7,568	$ 807	$ 0	659	12,569	825	(7,179)	(113)	227
Net change, shares				144,523	(124,492,698)
Balance, end 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
Ending balance, shares at Dec. 31, 2017				11,677,235	4,891,616,628
Stockholders' Equity Period Increase (Decrease)
Cumulative effect from change in accounting principle | Accounting Standards Update 2016-01 [Member]	[4]							(118)
Cumulative effect from change in accounting principle | Accounting Standards Update (ASU) 2016-01; ASU 2016-04; ASU 2016-16 and ASU 2014-09 [Member]	[4]	(24)	(24)				94
Balance, beginning of period adjusted balance		208,055	206,912	$ 25,358	$ 9,136	60,893	145,357	(2,262)	(29,892)	(1,678)	1,143
Adoption of accounting standard | Accounting Standards Update 2018-02 [Member]	[5]	0	0				400	(400)
Net income		22,393	22,393				22,393
Net income attributable to noncontrolling interests		(483)									483
Net income		22,876
Other comprehensive income (loss) attributable to parent, net of tax		(3,674)	(3,674)					(3,674)
Other comprehensive income (loss) attributable to noncontrolling interest, net of tax		2									(2)
Other comprehensive income (loss), net of tax		(3,676)						(4,076)
Noncontrolling interests, adjustments to Additional Paid in Capital			7			7
Noncontrolling interests											(724)
Total change in noncontrolling interests		(717)
Common stock issued		1,676	1,676			(76)	(321)		2,073
Common stock, shares issued					41,082,047
Common stock repurchased		(20,633)	(20,633)			0			(20,633)
Common stock repurchased, shares					(375,477,998)
Preferred stock redeemed, Value	[6]	(2,150)	(2,150)	$ (1,995)			(155)
Preferred stock redeemed, Shares	[6]			(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		1,249	1,249			(70)				1,319
Preferred stock converted to common shares		0	0	$ (1,249)		6			1,243
Preferred stock converted to common shares, shares				(1,249,644)	24,032,931
Common stock warrants repurchased/exercised		(325)	(325)			(325)
Preferred stock issued		0	0	$ 0		0
Preferred stock, shares issued				0
Common stock dividends		(7,889)	(7,889)			66	(7,955)
Preferred stock dividends		(1,556)	(1,556)				(1,556)
Stock incentive compensation expense		1,041	1,041			1,041
Net change in deferred compensation and related plans		(885)	(885)			(900)			15
Net change		(10,989)	(10,746)	$ (2,144)	$ 0	(208)	12,806	(4,074)	(17,302)	176	(243)
Net change, shares				(2,300,019)	(310,363,020)
Balance, end of period at Dec. 31, 2018		$ 197,066	$ 196,166	$ 23,214	$ 9,136	$ 60,685	$ 158,163	$ (6,336)	$ (47,194)	$ (1,502)	$ 900
Ending balance, shares at Dec. 31, 2018				9,377,216	4,581,253,608
[1]	(1)Effective January 1, 2016, we adopted changes in consolidation accounting pursuant to Accounting Standards Update (ASU) 2015-02: Amendments to the Consolidation Analysis. Accordingly, we recorded a $121 million net increase to beginning noncontrolling interests as a cumulative-effect adjustment.
[2]	(2)For the year ended December 31, 2016, includes $750 million related to a private forward repurchase transaction that settled in first quarter 2017 for 14.7 million shares of common stock. See Note 1 (Summary of Significant Accounting Policies) for additional information.
[3]	(3)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.
[4]	(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.
[5]	(2)Represents the reclassification from other comprehensive income to retained earnings as a result of our 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.
[6]	(3)Represents the impact of the redemption of preferred stock, series J, in third quarter 2018.

Consolidated Statement of Cha_2

Consolidated Statement of Changes in Equity (Parenthetical) - USD ($) shares in Millions, $ in Millions		3 Months Ended	12 Months Ended
		Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Accounting Standards Update 2015-02 [Member]
Consolidated Statement of Changes in Equity (Textuals) [Abstract]
Cumulative effect from change in accounting principle	[1]					$ 121
Private Forward Repurchase Transaction [Member]
Consolidated Statement of Changes in Equity (Textuals) [Abstract]
Private forward repurchase contract			$ 0	$ 0	$ 750
Common stock repurchased, shares		14.7	94	89
Noncontrolling interests [Member] | Accounting Standards Update 2015-02 [Member]
Consolidated Statement of Changes in Equity (Textuals) [Abstract]
Cumulative effect from change in accounting principle	[1]					$ 121
[1]	(1)Effective January 1, 2016, we adopted changes in consolidation accounting pursuant to Accounting Standards Update (ASU) 2015-02: Amendments to the Consolidation Analysis. Accordingly, we recorded a $121 million net increase to beginning noncontrolling interests as a cumulative-effect adjustment.

Consolidated Statement of Cash

Consolidated Statement of Cash Flows - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016
Cash flows from operating activities:
Net income before noncontrolling interests		$ 22,876		$ 22,460		$ 22,045
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses		1,744		2,528		3,770
Changes in fair value of MSRs, MLHFS and LHFS carried at fair value		453		886		139
Depreciation, amortization and accretion		5,593		5,406		4,970
Other net gains (1)		(7,630)		(1,518)	[1]	(6,337)	[1]
Stock-based compensation		2,255		2,046		1,945
Originations and purchases of mortgage loans held for sale (1)		(152,832)		(181,269)	[1]	(205,300)	[1]
Proceeds from sales of and paydowns on mortgages loans held for sale (1)		119,097		134,984	[1]	127,479	[1]
Net change in:
Debt and equity securities, held for trading (1)		35,054		33,505	[1]	63,309	[1]
Loans held for sale (1)		(960)		327	[1]	(451)	[1]
Deferred income taxes		1,970		666		1,793
Derivative assets and liabilities		1,513		(5,025)		2,089
Other assets (1)		7,805		(1,214)	[1]	(14,232)	[1]
Other accrued expenses and liabilities		(865)		4,837		(211)
Net cash provided by operating activities		36,073		18,619		1,008
Net change in:
Federal funds sold and securities purchased under resale agreements (2)		(1,184)		(21,497)	[2]	(15,747)	[2]
Available-for-sale debt securities:
Proceeds from sales (1)		7,320		42,067	[1]	30,958	[1]
Prepayments and maturities (1)		36,725		45,688	[1]	40,998	[1]
Purchases (1)		(60,067)		(103,656)	[1]	(120,978)	[1]
Held-to-maturity securities:
Paydowns and maturities		10,934		10,673		7,957
Purchases		0		0		(23,593)
Equity securities, not held for trading:
Proceeds from sales and capital returns (1)		6,242		5,451	[1]	3,711	[1]
Purchases (1)		(6,433)		(3,735)	[1]	(5,383)	[1]
Loans:
Loans originated by banking subsidiaries, net of principal collected		(18,619)		317		(39,002)
Proceeds from sales (including participations) of loans held for investment		16,294		10,439		10,061
Purchases (including participations) of loans		(2,088)		(3,702)		(6,221)
Principal collected on nonbank entities’ loans		6,791		7,448		6,844
Loans originated by nonbank entities		(6,482)		(6,814)		(7,743)
Net cash paid for acquisitions		(10)		(320)		(30,584)
Proceeds from sales of foreclosed assets and short sales		3,592		5,198		7,311
Other, net (2)		(769)		(709)	[2]	(508)	[2]
Net cash used by investing activities		(7,754)		(13,152)		(141,919)
Net change in:
Deposits		(48,034)		29,912		82,767
Short-term borrowings		2,531		14,020		(1,198)
Long-term debt:
Proceeds from issuance		47,595		43,575		90,111
Repayment		(40,565)		(80,802)		(34,462)
Preferred stock:
Proceeds from issuance		0		677		2,101
Redeemed		(2,150)		0		0
Cash dividends paid		(1,622)		(1,629)		(1,566)
Common stock:
Proceeds from issuance		632		1,211		1,415
Stock tendered for payment of withholding taxes		(331)		(393)		(494)
Repurchased		(20,633)		(9,908)		(8,116)
Cash dividends paid		(7,692)		(7,480)		(7,472)
Net change in noncontrolling interests		(462)		30		(188)
Other, net		(248)		(133)		(107)
Net cash provided (used) by financing activities		(70,979)		(10,920)		122,791
Net change in cash, cash equivalents, and restricted cash (2)		(42,660)		(5,453)	[2]	(18,120)	[2]
Cash, cash equivalents, and restricted cash at beginning of year (2)	[2]	215,947	[3]	221,400		239,520
Cash, cash equivalents, and restricted cash at end of year (2)		173,287		215,947	[2],[3]	221,400	[2]
Supplemental cash flow disclosures:
Cash paid for interest		14,366		9,103		5,573
Cash paid for income taxes		$ 1,977		$ 6,592		$ 8,446
[1]	(1)Financial information for the prior periods has been revised to reflect presentation changes made in connection with our 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]	(2)Financial information has been revised to reflect the impact of our 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.
[3]	(1)Financial information has been revised to reflect the impact of our 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	12 Months Ended
	Dec. 31, 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. 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 18 (Fair Values of Assets and Liabilities)); • liabilities for contingent litigation losses (Note 16 (Legal Actions)); and • income taxes (Note 23 (Income Taxes)). Actual results could differ from those estimates. Accounting Standards Adopted in 2018 In 2018 , we adopted the following new accounting guidance: • Accounting Standards Update (ASU or Update) 2018-14 – Compensation – Retirement Benefits – Defined Benefit Plans—General (Subtopic 715-20): Disclosure Framework – Changes to the Disclosure Requirements for Defined Benefit Plans • ASU 2018-02 – Income Statement-Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income • ASU 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 2018-14 changes the disclosure requirements for our defined benefit pension and postretirement plans. We are eliminating two disclosures that are no longer considered beneficial: (1) information related to amounts in accumulated other comprehensive income to be recognized in the next year as benefit cost and (2) the effect of one-percentage point change on assumed health care cost trend rates. We have added two disclosures: (1) the weighted-average interest crediting rates for plans with promised interest crediting rates, and (2) explanations for significant gain and losses related to changes in the benefit obligation. We early adopted this change in fourth quarter 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 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 25 (Other Comprehensive Income). We have finalized our provisional tax estimates based on the completion of our U.S. tax filings in fourth quarter 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. 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. We adopted this change in first quarter 2018. The Update is applied prospectively and 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 Reserve 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 investments, 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 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 18: Fair Values of Assets and Liabilities Loans held for sale FV-NI (1) Note 18: 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 Equity securities: Marketable FV-NI (1) Note 4: Trading Activities Nonmarketable FV-NI (1) Cost method Equity method MA (4) Note 4: Trading Activities Other assets Amortized cost (5) Note 7: Premises, Equipment, Lease Commitments and 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. We adopted the Update in first quarter 2018, and upon a modified retrospective adoption, we recorded a cumulative-effect adjustment as of January 1, 2018, 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. Consolidation Our consolidated financial statements include the accounts of the Parent and our subsidiaries in which we have a controlling interest. We are also a variable interest holder in certain entities in which equity investors do not have the characteristics of a controlling financial interest or where the entity does not have enough equity at risk to finance its activities without additional subordinated financial support from other parties (referred to as variable interest entities (VIEs)). Our variable interest arises from contractual, ownership or other monetary interests in the entity, which change with fluctuations in the fair value of the entity’s net assets. We consolidate a VIE if we are the primary beneficiary. We are the primary beneficiary if we have a controlling financial interest, which includes both the power to direct the activities that most significantly impact the VIE and a variable interest that potentially could be significant to the VIE. To determine whether or not a variable interest we hold could potentially be significant to the VIE, we consider both qualitative and quantitative factors regarding the nature, size and form of our involvement with the VIE. We assess whether or not we are the primary beneficiary of a VIE on an ongoing basis. Significant intercompany accounts and transactions are eliminated in consolidation. When we have significant influence over operating and financing decisions for a company but do not own a majority of the voting equity interests, we account for the investment using the equity method of accounting, which requires us to recognize our proportionate share of the company’s earnings. If we do not have significant influence, we account for the equity security under the fair value method, cost method or measurement alternative. Cash, Cash Equivalents and Restricted Cash Cash, cash equivalents and restricted cash include cash on hand, cash items in transit, and amounts due from or held with other depository institutions. See Note 3 (Cash, Loan and Dividend Restrictions) for the nature of our restrictions on cash and cash equivalents. 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. The assets and liabilities classified as trading include debt securities, loans, equity securities, derivatives and short sales, which are reported within the balance sheet line item based on the form of the instrument. In addition, debt securities that are held for investment purposes that we have elected to account for under the fair value method, are classified as trading. 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. 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. Debt Securities Our investments in debt securities that are not held for trading purposes are classified as either debt securities available-for-sale (AFS) or held-to-maturity (HTM). AVAILABLE-FOR-SALE DEBT SECURITIES Debt securities for which the Company does not have the postitive intent and ability to hold to maturity are classified as AFS. These AFS debt securities are reported at fair value with unrealized gains and losses, net of applicable income taxes, reported in cumulative OCI. We conduct other-than-temporary impairment (OTTI) analysis on a quarterly basis or more often if a potential loss-triggering event occurs. The initial indicator of OTTI is a decline in fair value below the amortized cost of the debt security. An AFS debt security that has a decline in the fair value below the security’s amortized cost records OTTI if we (1) have the intent to sell the security, (2) it is more likely than not that we will be required to sell the security before recovery of its amortized cost basis, or (3) we do not expect to recover the entire amortized cost basis of the security. Estimating recovery of the amortized cost basis of an AFS debt security is based upon an assessment of the cash flows expected to be collected. If the present value of cash flows expected to be collected, discounted at the security’s effective yield, is less than amortized cost, OTTI is considered to have occurred. In performing an assessment of the cash flows expected to be collected, we consider all relevant information including: • the length of time and the extent to which the fair value has been less than the amortized cost basis; • the historical and implied volatility of the fair value of the security; • the cause of the price decline, such as the general level of interest rates or adverse conditions specifically related to the security, an industry or a geographic area; • the issuer’s financial condition, near-term prospects and ability to service the debt; • the payment structure of the debt security and the likelihood of the issuer being able to make payments that increase in the future; • for asset-backed securities, the credit performance of the underlying collateral, including delinquency rates, level of non-performing assets, cumulative losses to date, collateral value and the remaining credit enhancement compared with expected credit losses; • any change in rating agencies’ credit ratings at evaluation date from acquisition date and any likely imminent action; • independent analyst reports and forecasts, sector credit ratings and other independent market data; and • recoveries or additional declines in fair value subsequent to the balance sheet date. If we intend to sell the security, or if it is more likely than not we will be required to sell the security before recovery of amortized cost basis, an OTTI write-down is recognized in earnings equal to the entire difference between the amortized cost basis and fair value of the security. For debt security that is considered other-than-temporarily impaired that we do not intend to sell or it is more likely than not that we will not be required to sell before recovery, the OTTI write-down is separated into an amount representing the credit loss, which is recognized in earnings, and the amount related to all other factors, which is recognized in OCI. The measurement of the credit loss component is equal to the difference between the debt security’s amortized cost basis and the present value of its expected future cash flows discounted at the security’s effective yield. The remaining difference between the security’s fair value and the present value of expected future cash flows is due to all other factors. We believe that we will fully collect the carrying value of securities on which we have recorded a non-credit-related impairment in OCI. Following the recognition of OTTI, the security’s new amortized cost basis is the previous basis minus the OTTI amount recognized in earnings. We recognize realized gains and losses on the sale of AFS debt securities in net gains (losses) on debt securities using the specific identification method. Unamortized premiums and discounts are recognized in interest income over the contractual life of the security using the interest method. As principal repayments are received on securities (i.e., primarily mortgage-backed securities (MBS)) a proportionate amount of the related premium or discount is recognized in income so that the effective interest rate on the remaining portion of the security continues unchanged. HELD-TO-MATURITY DEBT SECURITIES Debt securities for which the Company has the positive intent and ability to hold to maturity are classified as held-to-maturity (HTM). These HTM debt securities are reported at historical cost adjusted for amortization of premiums and accretion of discounts. We recognize OTTI when there is a decline in fair value and we do not expect to recover the entire amortized cost basis of the debt security. The amortized cost is written-down to fair value with the credit loss component recorded to earnings and the remaining component recognized in OCI. The OTTI assessment related to intent to sell, required to sell, whether we expect recovery of the amortized cost basis and determination of any credit loss component recognized in earnings for HTM debt securities is the same as described for AFS debt securities. AFS debt securities transferred to the HTM classification are recorded at fair value and the unrealized gains or losses resulting from the transfer of these securities continue to be reported in cumulative OCI. The unamortized OCI balance is amortized into earnings over the remaining life of the security using the effective interest method. The HTM amortized cost basis used in the OTTI analysis includes the unamortized OCI balances related to previous security transfers . Securities Purchased and Sold Agreements Securities purchased under resale agreements and securities sold under repurchase agreements are accounted for as collateralized financing transactions and are recorded at the acquisition or sale price plus accrued interest. We monitor the fair value of securities purchased and sold and obtain collateral from or return it to counterparties when appropriate. These financing transactions do not create material credit risk given the collateral provided and the related monitoring process. Mortgage Loans and Loans Held for Sale Mortgage loans held for sale (MLHFS) include commercial and residential mortgages originated for sale and securitization in the secondary market, which is our principal market, or for sale as whole loans. We have elected the fair value option for substantially all residential MLHFS (see Note 18 (Fair Values of Assets and Liabilities)). The remaining residential MLHFS are held at the lower of cost or fair value (LOCOM) and are valued on an aggregate portfolio basis. Commercial MLHFS are held at LOCOM and are valued on an individual loan basis. Loans held for sale (LHFS) includes commercial loans originated for sale in the secondary market and loans used in market-making activities in our trading business. The loans held for trading purposes are carried at fair value, with the remainder of LHFS recorded at LOCOM. Gains and losses on MLHFS are recorded in mortgage banking noninterest income. Gains and losses on LHFS used in trading activities are recognized in net gains from trading activities, with gains and losses on LHFS not used in trading activities recognized in other noninterest income. Direct loan origination costs and fees for MLHFS and LHFS under the fair value option are recognized in income at origination. For MLHFS and LHFS recorded at LOCOM, loan costs and fees are deferred at origination and are recognized in income at time of sale. Interest income on MLHFS and LHFS is calculated based upon the note rate of the loan and is recorded in interest income. Our lines of business are authorized to originate held-for-investment loans that meet or exceed established loan product profitability criteria, including minimum positive net interest margin spreads in excess of funding costs. When a determination is made at the time of commitment to originate loans as held for investment, it is our intent to hold these loans to maturity or for the “foreseeable future,” subject to periodic review under our management evaluation processes, including corporate asset/liability management. In determining the “foreseeable future” for loans, management considers (1) the current economic environment and market conditions, (2) our business strategy and current business plans, (3) the nature and type of the loan receivable, including its expected life, and (4) our current financial condition and liquidity demands. If subsequent changes, including changes in interest rates, significantly impact the ongoing profitability of certain loan products, we may subsequently change our intent to hold these loans, and we would take actions to sell such loans. Upon such management determination, we immediately transfer these loans to the MLHFS or LHFS portfolio at LOCOM. Loans Loans are reported at their outstanding principal balances net of any unearned income, cumulative charge-offs, unamortized deferred fees and costs on originated loans and unamortized premiums or discounts on purchased loans. PCI loans are reported net of any remaining purchase accounting adjustments. See the “Purchased Credit-Impaired Loans” section in this Note for our accounting policy for PCI loans. Unearned income, deferred fees and costs, and discounts and premiums are amortized to interest income over the contractual life of the loan using the interest method. Loan commitment fees are generally deferred and amortized into noninterest income on a straight-line basis over the commitment period. We have certain private label and co-brand credit card loans through a program agreement that involves our active participation in the operating activity of the program with a third party. We share in the economic results of the loans subject to this agreement. We consider the program to be a collaborative arrangement and therefore report our share of revenue and losses on a net basis in interest income for loans, other noninterest income and provision for credit losses as applicable. Our net share of revenue from this activity represented less than 1% of our total revenues for 2018 . Loans also include direct financing leases that are recorded at the aggregate of minimum lease payments receivable plus the estimated residual value of the leased property, less unearned income. Leveraged leases, which are a form of direct financing leases, are recorded net of related non-recourse debt. Leasing income is recognized as a constant percentage of outstanding lease financing balances over the lease terms in interest income. NONACCRUAL AND PAST DUE LOANS We generally place loans on nonaccrual status when: • the full and timely collection of interest or principal becomes uncertain (generally based on an assessment of the borrower’s financial condition and the adequacy of collateral, if any), such as in bankruptcy or other circumstances; • they are 90 days ( 120 days with respect to real estate 1-4 family first and junior lien mortgages) past due for interest or principal, unless both well-secured and in the process of collection; • part of the principal balance has been charged off, except for credit card loans, which are generally not placed on nonaccrual status, but are generally fully charged off when the loan reaches 180 days past due; or • for junior lien mortgages, we have evidence that the related first lien mortgage may be 120 days past due or in the process of foreclosure regardless of the junior lien delinquency status. PCI loans are written down at acquisition to fair value using an estimate of cash flows deemed to be collectible and an accretable yield is established. Accordingly, such loans are not classified as nonaccrual because they continue to earn interest from accretable yield, independent of performance in accordance of their contractual terms, and we expect to fully collect the new carrying values of such loans (that is, the new co

Business Combinations

Business Combinations	12 Months Ended
	Dec. 31, 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 15 (Guarantees, Pledged Assets and Collateral, and Other Commitments). Business combinations completed in 2017 and 2016 are presented in Table 2.1. There were no new acquisitions during 2018. As of December 31, 2018 , we had no pending acquisitions. Table 2.1: Business Combinations Activity Name of acquisition Location Type of business Date Total assets (in millions) 2017: Golden Capital Management, LLC Charlotte, NC Asset Management July 1 $ 83 2016: GE Railcar Services Chicago, IL Railcar and locomotive leasing January 1 $ 4,339 GE Capital’s Commercial Distribution Finance and Vendor Finance Businesses North America, Asia, Australia / New Zealand and EMEA Specialty Lending March 1, July 1, August 1 & October 1 32,531 Analytic Investors, LLC Los Angeles, CA Asset Management October 1 106 $ 36,976 During 2018, we completed the sale of Wells Fargo Shareowner Services in February, the sale of the automobile lending business of Reliable Financial Services, Inc. and Reliable Finance Holding Company in August, and the sale of 52 branches in Indiana, Ohio, Michigan and part of Wisconsin in November. Included with the branches sale were approximately $2.0 billion of deposits.

Cash, Loan and Dividend Restric

Cash, Loan and Dividend Restrictions	12 Months Ended
	Dec. 31, 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) Dec 31, Dec 31, Average required reserve balance for FRB (1) $ 12,428 12,306 Reserve balance for non-U.S. central banks 517 617 Segregated for benefit of brokerage customers under federal and other brokerage regulations 1,135 666 Related to consolidated variable interest entities (VIEs) that can only be used to settle liabilities of VIEs 147 487 (1) FRB required reserve balance represents average for the years ended December 31, 2018 , and December 31, 2017 . Federal law restricts the amount and the terms of both credit and non-credit transactions between a bank and its nonbank affiliates. These covered transactions may not exceed 10% of the bank’s capital and surplus (which for this purpose represents Tier 1 and Tier 2 capital, as calculated under the risk-based capital (RBC) guidelines, plus the balance of the allowance for credit losses excluded from Tier 2 capital) with any single nonbank affiliate and 20% of the bank’s capital and surplus with all its nonbank affiliates. Transactions that are extensions of credit may require collateral to be held to provide added security to the bank. For further discussion of RBC, see Note 28 (Regulatory and Agency Capital Requirements) in this Report. Dividends paid by our subsidiary banks are subject to various federal and state regulatory limitations. Dividends that may be paid by a national bank without the express approval of the Office of the Comptroller of the Currency (OCC) are limited to that bank’s retained net profits for the preceding two calendar years plus retained net profits up to the date of any dividend declaration in the current calendar year. Retained net profits, as defined by the OCC, consist of net income less dividends declared during the period. We also 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 $15.2 billion at December 31, 2018 , without obtaining prior regulatory approval. We have elected to retain higher capital at our national and state-chartered subsidiary banks in order to meet internal capital policy minimums and regulatory requirements. 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. In 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 December 31, 2018 , our nonbank subsidiaries could have declared additional dividends of $24.4 billion at December 31, 2018 , without obtaining prior approval. 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 $0.45 per share as declared by the Company’s Board of Directors on January 22, 2019 , payable on March 1, 2019 .

Trading Activities

Trading Activities	12 Months Ended
	Dec. 31, 2018
Trading Activities [Abstract]
Trading Activities	Note 4: Trading Activities Table 4.1 presents a summary of our trading assets and liabilities measured at fair value through earnings. Table 4.1: Trading Activities and Liabilities (in millions) Dec 31, Dec 31, Trading assets: Debt securities $ 69,989 57,624 Equity securities 19,449 30,004 Loans held for sale 1,469 1,023 Gross trading derivative assets 29,216 31,340 Netting (1) (19,807 ) (19,629 ) Total trading derivative assets 9,409 11,711 Total trading assets 100,316 100,362 Trading liabilities: Short sale 19,720 18,472 Gross trading derivative liabilities 28,717 31,386 Netting (1) (21,178 ) (23,062 ) Total trading derivative liabilities 7,539 8,324 Total trading liabilities $ 27,259 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 Year ended December 31, (in millions) 2018 2017 2016 Interest income (1): Debt securities $ 2,831 2,313 2,047 Equity securities 587 515 383 Loans held for sale 62 38 29 Total interest income 3,480 2,866 2,459 Less: Interest expense (2) 587 416 353 Net interest income 2,893 2,450 2,106 Net gains (losses) from trading activities: Debt securities (824 ) 125 (444 ) Equity securities (4,240 ) 3,394 1,213 Loans held for sale (1 ) 45 55 Derivatives (3) 5,667 (3,022 ) (214 ) Total net gains from trading activities (4) 602 542 610 Total trading-related net interest and noninterest income $ 3,495 2,992 2,716 (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

AFS and HTM Debt Securities	12 Months Ended
	Dec. 31, 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 December 31, 2018 Available-for-sale debt securities: Securities of U.S. Treasury and federal agencies $ 13,451 3 (106 ) 13,348 Securities of U.S. states and political subdivisions (1) 48,994 716 (446 ) 49,264 Mortgage-backed securities: Federal agencies 155,974 369 (3,140 ) 153,203 Residential 2,638 142 (5 ) 2,775 Commercial 4,207 40 (22 ) 4,225 Total mortgage-backed securities 162,819 551 (3,167 ) 160,203 Corporate debt securities 6,230 131 (90 ) 6,271 Collateralized loan and other debt obligations (2) 35,581 158 (396 ) 35,343 Other (3) 5,396 100 (13 ) 5,483 Total available-for-sale debt securities 272,471 1,659 (4,218 ) 269,912 Held-to-maturity debt securities: Securities of U.S. Treasury and federal agencies 44,751 4 (415 ) 44,340 Securities of U.S. states and political subdivisions 6,286 30 (116 ) 6,200 Federal agency and other mortgage-backed securities (4) 93,685 112 (2,288 ) 91,509 Collateralized loan obligations 66 — — 66 Other (3) — — — — Total held-to-maturity debt securities 144,788 146 (2,819 ) 142,115 Total (5) $ 417,259 1,805 (7,037 ) 412,027 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 (5) $ 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 $6.3 billion each at December 31, 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 $662 million and $800 million , respectively, at December 31, 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 December 31, 2018, and $114 million each at December 31, 2017 . (4) Predominantly consists of federal agency mortgage-backed securities at both December 31, 2018 , and December 31, 2017 . (5) At December 31, 2018 and 2017 , we held no securities of any single issuer (excluding the U.S. Treasury and federal agencies and government-sponsored entities (GSEs)) with a book value that exceeded 10% of stockholder’s equity. 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 December 31, 2018 Available-for-sale debt securities: Securities of U.S. Treasury and federal agencies $ (1 ) 498 (105 ) 6,204 (106 ) 6,702 Securities of U.S. states and political subdivisions (73 ) 9,746 (373 ) 9,017 (446 ) 18,763 Mortgage-backed securities: Federal agencies (42 ) 10,979 (3,098 ) 112,252 (3,140 ) 123,231 Residential (3 ) 398 (2 ) 69 (5 ) 467 Commercial (20 ) 1,972 (2 ) 79 (22 ) 2,051 Total mortgage-backed securities (65 ) 13,349 (3,102 ) 112,400 (3,167 ) 125,749 Corporate debt securities (64 ) 1,965 (26 ) 298 (90 ) 2,263 Collateralized loan and other debt obligations (388 ) 28,306 (8 ) 553 (396 ) 28,859 Other (7 ) 819 (6 ) 159 (13 ) 978 Total available-for-sale debt securities (598 ) 54,683 (3,620 ) 128,631 (4,218 ) 183,314 Held-to-maturity debt securities: Securities of U.S. Treasury and federal agencies (3 ) 895 (412 ) 41,083 (415 ) 41,978 Securities of U.S. states and political subdivisions (4 ) 598 (112 ) 3,992 (116 ) 4,590 Federal agency and other mortgage-backed securities (5 ) 4,635 (2,283 ) 77,741 (2,288 ) 82,376 Collateralized loan obligations — — — — — — Total held-to-maturity debt securities (12 ) 6,128 (2,807 ) 122,816 (2,819 ) 128,944 Total $ (610 ) 60,811 (6,427 ) 251,447 (7,037 ) 312,258 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 below. SECURITIES OF U.S. TREASURY AND FEDERAL AGENCIES AND FEDERAL AGENCY MORTGAGE-BACKED SECURITIES (MBS) The unrealized losses associated with U.S. Treasury and federal agency securities and federal agency MBS are generally driven by changes in interest rates and not due to credit losses given the explicit or implicit guarantees provided by the U.S. government. SECURITIES OF U.S. STATES AND POLITICAL SUBDIVISIONS The unrealized losses associated with securities of U.S. states and political subdivisions are usually driven by changes in the relationship between municipal and term funding credit curves rather than by changes to the credit quality of the underlying securities. Substantially all of these investments with unrealized losses are investment grade. The securities were generally underwritten in accordance with our own investment standards prior to the decision to purchase. Some of these securities are guaranteed by a bond insurer, but we did not rely on this guarantee when making our investment decision. These investments will continue to be monitored as part of our ongoing impairment analysis but are expected to perform, even if the rating agencies reduce the credit rating of the bond insurers. As a result, we expect to recover the entire amortized cost basis of these securities. RESIDENTIAL AND COMMERCIAL MBS The unrealized losses associated with private residential MBS and commercial MBS are generally driven by changes in projected collateral losses, credit spreads and interest rates. We assess for credit impairment by estimating the present value of expected cash flows. The key assumptions for determining expected cash flows include default rates, loss severities and/or prepayment rates. We estimate security losses by forecasting the underlying mortgage loans in each transaction. We use forecasted loan performance to project cash flows to the various tranches in the structure. We also consider cash flow forecasts and, as applicable, independent industry analyst reports and forecasts, sector credit ratings, and other independent market data. Based upon our assessment of the expected credit losses and the credit enhancement level of the securities, we expect to recover the entire amortized cost basis of these securities. CORPORATE DEBT SECURITIES The unrealized losses associated with corporate debt securities are predominantly related to unsecured debt obligations issued by various corporations. We evaluate the financial performance of each issuer on a quarterly basis to determine if the issuer can make all contractual principal and interest payments. Based upon this assessment, we expect to recover the entire amortized cost basis of these securities. COLLATERALIZED LOAN AND OTHER DEBT OBLIGATIONS The unrealized losses associated with collateralized loan and other debt obligations relate to securities predominantly backed by commercial collateral. The unrealized losses are typically driven by changes in projected collateral losses, credit spreads and interest rates. We assess for credit impairment by estimating the present value of expected cash flows. The key assumptions for determining expected cash flows include default rates, loss severities and prepayment rates. We also consider cash flow forecasts and, as applicable, independent industry analyst reports and forecasts, sector credit ratings, and other independent market data. Based upon our assessment of the expected credit losses and the credit enhancement level of the securities, we expect to recover the entire amortized cost basis of these securities. OTHER DEBT SECURITIES The unrealized losses associated with other debt securities predominantly relate to other asset-backed securities. The losses are usually driven by changes in projected collateral losses, credit spreads and interest rates. We assess for credit impairment by estimating the present value of expected cash flows. The key assumptions for determining expected cash flows include default rates, loss severities and prepayment rates. Based upon our assessment of the expected credit losses and the credit enhancement level of the securities, we expect to recover the entire amortized cost basis of these securities. OTHER DEBT SECURITIES MATTERS The fair values of our debt securities could decline in the future if the underlying performance of the collateral for the residential and commercial MBS or other securities deteriorate, and our credit enhancement levels do not provide sufficient protection to our contractual principal and interest. As a result, there is a risk that significant OTTI may occur in the future. 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 $20 million and $5.2 billion , respectively, at December 31, 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 December 31, 2018 Available-for-sale debt securities: Securities of U.S. Treasury and federal agencies $ (106 ) 6,702 — — Securities of U.S. states and political subdivisions (425 ) 18,447 (21 ) 316 Mortgage-backed securities: Federal agencies (3,140 ) 123,231 — — Residential (2 ) 295 (3 ) 172 Commercial (20 ) 1,999 (2 ) 52 Total mortgage-backed securities (3,162 ) 125,525 (5 ) 224 Corporate debt securities (17 ) 791 (73 ) 1,472 Collateralized loan and other debt obligations (396 ) 28,859 — — Other (7 ) 726 (6 ) 252 Total available-for-sale debt securities (4,113 ) 181,050 (105 ) 2,264 Held-to-maturity debt securities: Securities of U.S. Treasury and federal agencies (415 ) 41,978 — — Securities of U.S. states and political subdivisions (116 ) 4,590 — — Federal agency and other mortgage-backed securities (2,278 ) 81,977 (10 ) 399 Collateralized loan obligations — — — — Total held-to-maturity debt securities (2,809 ) 128,545 (10 ) 399 Total $ (6,922 ) 309,595 (115 ) 2,663 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 December 31, 2018 Available-for-sale debt securities (1): Fair value: Securities of U.S. Treasury and federal agencies $ 13,348 1.87 % $ 1,087 1.52 % $ 12,213 1.90 % $ 48 1.89 % $ — — % Securities of U.S. states and political subdivisions 49,264 4.78 3,568 2.92 6,644 3.42 4,635 3.44 34,417 5.42 Mortgage-backed securities: Federal agencies 153,203 3.42 — — 169 3.52 1,909 2.56 151,125 3.43 Residential 2,775 4.01 — — 14 5.85 6 3.04 2,755 4.00 Commercial 4,225 3.64 — — — — 342 3.60 3,883 3.65 Total mortgage-backed securities 160,203 3.44 — — 183 3.70 2,257 2.72 157,763 3.45 Corporate debt securities 6,271 5.11 390 6.27 2,525 5.25 2,743 4.68 613 5.67 Collateralized loan and other debt obligations 35,343 3.89 — — 28 4.18 8,866 3.91 26,449 3.89 Other 5,483 3.17 15 6.02 818 3.84 1,446 2.17 3,204 3.44 Total available-for-sale debt securities at fair value $ 269,912 3.70 % $ 5,060 2.89 % $ 22,411 2.82 % $ 19,995 3.64 % $ 222,446 3.81 % 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 December 31, 2018 Held-to-maturity debt securities (1): Amortized cost: Securities of U.S. Treasury and federal agencies $ 44,751 2.12 % $ — — % $ 32,356 2.04 % $ 12,395 2.32 % $ — — % Securities of U.S. states and political subdivisions 6,286 4.93 — — 72 6.04 1,188 4.91 5,026 4.92 Federal agency and other mortgage-backed securities 93,685 3.10 — — 26 3.52 — — 93,659 3.10 Collateralized loan obligations 66 3.62 — — — — 66 3.62 — — Other — — — — — — — — — — Total held-to-maturity debt securities at amortized cost $ 144,788 2.87 % $ — — % $ 32,454 2.05 % $ 13,649 2.55 % $ 98,685 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 December 31, 2018 Held-to-maturity debt securities: Fair value: Securities of U.S. Treasury and federal agencies $ 44,340 — 32,073 12,267 — Securities of U.S. states and political subdivisions 6,200 — 70 1,191 4,939 Federal agency and other mortgage-backed securities 91,509 — 26 — 91,483 Collateralized loan obligations 66 — — 66 — Other — — — — — Total held-to-maturity debt securities at fair value $ 142,115 — 32,169 13,524 96,422 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 Year ended December 31, (in millions) 2018 2017 2016 Gross realized gains $ 155 948 1,234 Gross realized losses (19 ) (207 ) (103 ) OTTI write-downs (28 ) (262 ) (189 ) Net realized gains from available-for-sale debt securities $ 108 479 942 Other-Than-Temporary 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 years ended December 31, 2018 , 2017 or 2016 . Table 5.8: Detail of OTTI Write-downs Year ended December 31, (in millions) 2018 2017 2016 Debt securities OTTI write-downs included in earnings: Securities of U.S. states and political subdivisions $ 2 150 63 Mortgage-backed securities: Residential 4 11 34 Commercial 18 80 14 Corporate debt securities — 21 72 Other debt securities 4 — 6 Total debt securities OTTI write-downs included in earnings $ 28 262 189 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 Year ended December 31, (in millions) 2018 2017 2016 OTTI on debt securities Recorded as part of gross realized losses: Credit-related OTTI $ 27 119 143 Intent-to-sell OTTI 1 143 46 Total recorded as part of gross realized losses 28 262 189 Changes to OCI for losses (reversal of losses) in non-credit-related OTTI (1): Securities of U.S. states and political subdivisions (2 ) (5 ) 8 Residential mortgage-backed securities 2 (1 ) (3 ) Commercial mortgage-backed securities (11 ) (51 ) 24 Corporate debt securities — 1 (13 ) Other debt securities — (1 ) 2 Total changes to OCI for non-credit-related OTTI (11 ) (57 ) 18 Total OTTI losses (reversal of losses) recorded on debt securities $ 17 205 207 (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 Year ended December 31, (in millions) 2018 2017 2016 Credit loss recognized, beginning of year $ 742 1,043 1,092 Additions: For securities with initial credit impairments 1 9 85 For securities with previous credit impairments 26 110 58 Total additions 27 119 143 Reductions: For securities sold, matured, or intended/required to be sold (204 ) (414 ) (184 ) For recoveries of previous credit impairments (1) (3 ) (6 ) (8 ) Total reductions (207 ) (420 ) (192 ) Credit loss recognized, end of year $ 562 742 1,043 (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	12 Months Ended
	Dec. 31, 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 $1.3 billion and $3.9 billion at December 31, 2018 and 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 December 31, (in millions) 2018 2017 2016 2015 2014 Commercial: Commercial and industrial $ 350,199 333,125 330,840 299,892 271,795 Real estate mortgage 121,014 126,599 132,491 122,160 111,996 Real estate construction 22,496 24,279 23,916 22,164 18,728 Lease financing 19,696 19,385 19,289 12,367 12,307 Total commercial 513,405 503,388 506,536 456,583 414,826 Consumer: Real estate 1-4 family first mortgage 285,065 284,054 275,579 273,869 265,386 Real estate 1-4 family junior lien mortgage 34,398 39,713 46,237 53,004 59,717 Credit card 39,025 37,976 36,700 34,039 31,119 Automobile 45,069 53,371 62,286 59,966 55,740 Other revolving credit and installment 36,148 38,268 40,266 39,098 35,763 Total consumer 439,705 453,382 461,068 459,976 447,725 Total loans $ 953,110 956,770 967,604 916,559 862,551 Our foreign loans are reported by respective class of financing receivable in the table above. Substantially all of our foreign loan portfolio is commercial loans. Loans are classified as foreign primarily based on whether the borrower’s primary address is outside of the United States. Table 6.2 presents total commercial foreign loans outstanding by class of financing receivable. Table 6.2: Commercial Foreign Loans Outstanding December 31, (in millions) 2018 2017 2016 2015 2014 Commercial foreign loans: Commercial and industrial $ 62,564 60,106 55,396 49,049 44,707 Real estate mortgage 6,731 8,033 8,541 8,350 4,776 Real estate construction 1,011 655 375 444 218 Lease financing 1,159 1,126 972 274 336 Total commercial foreign loans $ 71,465 69,920 65,284 58,117 50,037 Loan Concentrations Loan concentrations may exist when there are amounts loaned to borrowers engaged in similar activities or similar types of loans extended to a diverse group of borrowers that would cause them to be similarly impacted by economic or other conditions. At December 31, 2018 and 2017 , we did not have concentrations representing 10% or more of our total loan portfolio in domestic commercial and industrial loans and lease financing by industry or CRE loans (real estate mortgage and real estate construction) by state or property type. Real estate 1-4 family non-PCI mortgage loans to borrowers in the state of California represented 12% of total loans at both December 31, 2018 and 2017 , and PCI loans were under 1% in both years. These California loans are generally diversified among the larger metropolitan areas in California, with no single area consisting of more than 5% of total loans. We continuously monitor changes in real estate values and underlying economic or market conditions for all geographic areas of our real estate 1-4 family mortgage portfolio as part of our credit risk management process. Some of our real estate 1-4 family first and junior lien mortgage loans include an interest-only feature as part of the loan terms. These interest-only loans were approximately 4% of total loans at both December 31, 2018 and 2017. Substantially all of these interest-only loans at origination were considered to be prime or near prime. We do not offer option adjustable-rate mortgage (ARM) products, nor do we offer variable-rate mortgage products with fixed payment amounts, commonly referred to within the financial services industry as negative amortizing mortgage loans. We acquired an option payment loan portfolio (Pick-a-Pay) from Wachovia at December 31, 2008. A majority of the portfolio was identified as PCI loans. Since the acquisition, we have reduced our exposure to the option payment portion of the portfolio through our modification efforts and loss mitigation actions. At December 31, 2018 , approximately 1% of total loans remained with the payment option feature compared with 10% at December 31, 2008. Our first and junior lien lines of credit products generally have draw periods of 10 , 15 or 20 years , with variable interest rate and payment options during the draw period of (1) interest only or (2) 1.5% of total outstanding balance plus accrued interest. During the draw period, the borrower has the option of converting all or a portion of the line from a variable interest rate to a fixed rate with terms including interest-only payments for a fixed period between three to seven years or a fully amortizing payment with a fixed period between five to 30 years . At the end of the draw period, a line of credit generally converts to an amortizing payment schedule with repayment terms of up to 30 years based on the balance at time of conversion. At December 31, 2018 , our lines of credit portfolio had an outstanding balance of $43.6 billion , of which $11.1 billion , or 25% , is in its amortization period, another $1.3 billion , or 3% , of our total outstanding balance, will reach their end of draw period during 2019 through 2020 , $11.3 billion , or 26% , during 2021 through 2023 , and $19.9 billion , or 46% , will convert in subsequent years. This portfolio had unfunded credit commitments of $60.1 billion at December 31, 2018 . The lines that enter their amortization period may experience higher delinquencies and higher loss rates than the lines in their draw period. At December 31, 2018 , $488 million , or 4% , of outstanding lines of credit that are in their amortization period were 30 or more days past due, compared with $553 million , or 2% , for lines in their draw period. We have considered this increased inherent risk in our allowance for credit loss estimate. In anticipation of our borrowers reaching the end of their contractual commitment, we have created a program to inform, educate and help these borrowers transition from interest-only to fully-amortizing payments or full repayment. We monitor the performance of the borrowers moving through the program in an effort to refine our ongoing program strategy. 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 primarily includes loans purchased and sales of whole loan or participating interests, whereby we receive or transfer a portion of a loan after origination. The table excludes PCI loans and loans recorded at fair value, including loans originated for sale because their loan activity normally does not impact the allowance for credit losses. Table 6.3: Loan Purchases, Sales, and Transfers Year ended December 31, 2018 2017 (in millions) Commercial Consumer (1) Total Commercial Consumer (1) Total Purchases $ 2,065 16 2,081 3,675 2 3,677 Sales (1,905 ) (261 ) (2,166 ) (2,066 ) (425 ) (2,491 ) Transfers to MLHFS/LHFS (617 ) (1,995 ) (2,612 ) (736 ) (2 ) (738 ) (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 $91 billion at December 31, 2018 , and $85 billion at December 31, 2017 . We issue commercial letters of credit to assist customers in purchasing goods or services, typically for international trade. At December 31, 2018 and 2017 , we had $919 million 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 15 (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 are expected to expire without being used by the customer. In addition, we manage the potential risk in commitments to lend by limiting the total amount of commitments, both by individual customer and in total, by monitoring the size and maturity structure of these commitments and by applying the same credit standards for these commitments as for all of our credit activities. For loans and commitments to lend, we generally require collateral or a guarantee. We may require various types of collateral, including commercial and consumer real estate, 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) Dec 31, Dec 31, Commercial: Commercial and industrial $ 330,492 326,626 Real estate mortgage 6,984 7,485 Real estate construction 16,400 16,621 Total commercial 353,876 350,732 Consumer: Real estate 1-4 family first mortgage 29,736 29,876 Real estate 1-4 family junior lien mortgage 37,719 38,897 Credit card 109,840 108,465 Other revolving credit and installment 27,530 27,541 Total consumer 204,825 204,779 Total unfunded credit commitments $ 558,701 555,511 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 Year ended December 31, (in millions) 2018 2017 2016 2015 2014 Balance, beginning of year $ 11,960 12,540 12,512 13,169 14,971 Provision for credit losses 1,744 2,528 3,770 2,442 1,395 Interest income on certain impaired loans (1) (166 ) (186 ) (205 ) (198 ) (211 ) Loan charge-offs: Commercial: Commercial and industrial (727 ) (789 ) (1,419 ) (734 ) (627 ) Real estate mortgage (42 ) (38 ) (27 ) (59 ) (66 ) Real estate construction — — (1 ) (4 ) (9 ) Lease financing (70 ) (45 ) (41 ) (14 ) (15 ) Total commercial (839 ) (872 ) (1,488 ) (811 ) (717 ) Consumer: Real estate 1-4 family first mortgage (179 ) (240 ) (452 ) (507 ) (721 ) Real estate 1-4 family junior lien mortgage (179 ) (279 ) (495 ) (635 ) (864 ) Credit card (1,599 ) (1,481 ) (1,259 ) (1,116 ) (1,025 ) Automobile (947 ) (1,002 ) (845 ) (742 ) (729 ) Other revolving credit and installment (685 ) (713 ) (708 ) (643 ) (668 ) Total consumer (3,589 ) (3,715 ) (3,759 ) (3,643 ) (4,007 ) Total loan charge-offs (4,428 ) (4,587 ) (5,247 ) (4,454 ) (4,724 ) Loan recoveries: Commercial: Commercial and industrial 304 297 263 252 369 Real estate mortgage 70 82 116 127 160 Real estate construction 13 30 38 37 136 Lease financing 23 17 11 8 8 Total commercial 410 426 428 424 673 Consumer: Real estate 1-4 family first mortgage 267 288 373 245 212 Real estate 1-4 family junior lien mortgage 219 266 266 259 238 Credit card 307 239 207 175 161 Automobile 363 319 325 325 349 Other revolving credit and installment 118 121 128 134 146 Total consumer 1,274 1,233 1,299 1,138 1,106 Total loan recoveries 1,684 1,659 1,727 1,562 1,779 Net loan charge-offs (2,744 ) (2,928 ) (3,520 ) (2,892 ) (2,945 ) Other (87 ) 6 (17 ) (9 ) (41 ) Balance, end of year $ 10,707 11,960 12,540 12,512 13,169 Components: Allowance for loan losses $ 9,775 11,004 11,419 11,545 12,319 Allowance for unfunded credit commitments 932 956 1,121 967 850 Allowance for credit losses $ 10,707 11,960 12,540 12,512 13,169 Net loan charge-offs as a percentage of average total loans 0.29 % 0.31 0.37 0.33 0.35 Allowance for loan losses as a percentage of total loans 1.03 1.15 1.18 1.26 1.43 Allowance for credit losses as a percentage of total loans 1.12 1.25 1.30 1.37 1.53 (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 Year ended December 31, 2018 2017 (in millions) Commercial Consumer Total Commercial Consumer Total Balance, beginning of year $ 6,632 5,328 11,960 7,394 5,146 12,540 Provision (reversal of provision) for credit losses 281 1,463 1,744 (261 ) 2,789 2,528 Interest income on certain impaired loans (47 ) (119 ) (166 ) (59 ) (127 ) (186 ) Loan charge-offs (839 ) (3,589 ) (4,428 ) (872 ) (3,715 ) (4,587 ) Loan recoveries 410 1,274 1,684 426 1,233 1,659 Net loan charge-offs (429 ) (2,315 ) (2,744 ) (446 ) (2,482 ) (2,928 ) Other (20 ) (67 ) (87 ) 4 2 6 Balance, end of year $ 6,417 4,290 10,707 6,632 5,328 11,960 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 December 31, 2018 Collectively evaluated (1) $ 5,903 3,361 9,264 510,180 421,574 931,754 Individually evaluated (2) 514 929 1,443 3,221 13,126 16,347 PCI (3) — — — 4 5,005 5,009 Total $ 6,417 4,290 10,707 513,405 439,705 953,110 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 3-3) 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 September 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 $14.8 billion in criticized commercial and industrial loans and $4.8 billion in criticized commercial real estate (CRE) loans at December 31, 2018 , $1.5 billion and $612 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 December 31, 2018 By risk category: Pass $ 335,412 116,514 22,207 18,671 492,804 Criticized 14,783 4,500 289 1,025 20,597 Total commercial loans (excluding PCI) 350,195 121,014 22,496 19,696 513,401 Total commercial PCI loans (carrying value) 4 — — — 4 Total commercial loans $ 350,199 121,014 22,496 19,696 513,405 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 December 31, 2018 By delinquency status: Current-29 days past due (DPD) and still accruing $ 348,158 120,176 22,411 19,443 510,188 30-89 DPD and still accruing 508 207 53 163 931 90+ DPD and still accruing 43 51 — — 94 Nonaccrual loans 1,486 580 32 90 2,188 Total commercial loans (excluding PCI) 350,195 121,014 22,496 19,696 513,401 Total commercial PCI loans (carrying value) 4 — — — 4 Total commercial loans $ 350,199 121,014 22,496 19,696 513,405 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 December 31, 2018 By delinquency status: Current-29 DPD $ 263,881 33,644 38,008 43,604 35,794 414,931 30-59 DPD 1,411 247 292 1,040 140 3,130 60-89 DPD 549 126 212 314 87 1,288 90-119 DPD 257 74 192 109 80 712 120-179 DPD 225 77 320 2 27 651 180+ DPD 822 213 1 — 20 1,056 Government insured/guaranteed loans (1) 12,688 — — — — 12,688 Loans held at fair value 244 — — — — 244 Total consumer loans (excluding PCI) 280,077 34,381 39,025 45,069 36,148 434,700 Total consumer PCI loans (carrying value) 4,988 17 — — — 5,005 Total consumer loans $ 285,065 34,398 39,025 45,069 36,148 439,705 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) 14,767 — — — — 14,767 Loans held at fair value 376 — — — — 376 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 $7.7 billion at December 31, 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 December 31, 2018 , $885 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 $822 million , or 0.3% of total first mortgages (excluding PCI), at December 31, 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 $8.9 billion at December 31, 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 Real estate 1-4 family junior lien mortgage Credit card Automobile Other revolving credit and installment Total December 31, 2018 By FICO: < 600 $ 4,273 1,454 3,292 7,071 697 16,787 600-639 2,974 994 2,777 4,431 725 11,901 640-679 5,810 1,898 6,464 6,225 1,822 22,219 680-719 13,568 3,908 9,445 7,354 3,384 37,659 720-759 27,258 5,323 7,949 6,853 4,395 51,778 760-799 57,193 6,315 5,227 5,947 5,322 80,004 800+ 151,465 13,190 3,794 7,099 8,411 183,959 No FICO available 4,604 1,299 77 89 2,507 8,576 FICO not required — — — — 8,885 8,885 Government insured/guaranteed loans (1) 12,932 — — — — 12,932 Total consumer loans (excluding PCI) 280,077 34,381 39,025 45,069 36,148 434,700 Total consumer PCI loans (carrying value) 4,988 17 — — — 5,005 Total consumer loans $ 285,065 34,398 39,025 45,069 36,148 439,705 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 December 31, 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% $ 147,666 15,753 163,419 133,902 16,301 150,203 60.01-80% 104,477 11,183 115,660 104,639 12,918 117,557 80.01-100% 12,372 4,874 17,246 13,924 6,580 20,504 100.01-120% (1) 1,211 1,596 2,807 1,868 2,427 4,295 > 120% (1) 484 578 1,062 783 1,008 1,791 No LTV/CLTV available 935 397 1,332 1,073 452 1,525 Government insured/guaranteed loans (2) 12,932 — 12,932 15,143 — 15,143 Total consumer loans (excluding PCI) 280,077 34,381 314,458 271,332 39,686 311,018 Total consumer PCI loans (carrying value) 4,988 17 5,005 12,722 27 12,749 Total consumer loans $ 285,065 34,398 319,463 284,054 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 Dec 31, Dec 31, (in millions) 2018 2017 Commercial: Commercial and industrial $ 1,486 1,899 Real estate mortgage 580 628 Real estate construction 32 37 Lease financing 90 76 Total commercial 2,188 2,640 Consumer: Real estate 1-4 family first mortgage (1) 3,183 3,732 Real estate 1-4 family junior lien mortgage 945 1,086 Automobile 130 130 Other revolving credit and installment 50 58 Total consumer 4,308 5,006 Total nonaccrual loans (excluding PCI) $ 6,496 7,646 (1) Prior period has been revised to exclude $390 million of MLHFS, LHFS and loans held at fair value. 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 $4.6 billion and $6.3 billion at December 31, 2018 and 2017 , respectively, which included $3.2 billion and $4.0 billion , respectively, of loans that are government insured/guaranteed. Under the Consumer Financial Protection Bureau 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 $370 million at December 31, 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 (1) Dec 31, Dec 31, (in millions) 2018 2017 Total (excluding PCI): $ 8,704 11,532 Less: FHA insured/VA guaranteed (2) 7,725 10,475 Total, not government insured/guaranteed $ 979 1,057 By segment and class, not government insured/guaranteed: Commercial: Commercial and industrial $ 43 26 Real estate mortgage 51 23 Total commercial 94 49 Consumer: Real estate 1-4 family first mortgage 124 213 Real estate 1-4 family junior lien mortgage 32 60 Credit card 513 492 Automobile 114 143 Other revolving credit and installment 102 100 Total consumer 885 1,008 Total, not government insured/guaranteed $ 979 1,057 (1) Financial information for the prior period December 31, 2017 has been revised to exclude MLHFS, LHFS and loans held at fair value, which reduced “Total, not government insured/guaranteed” by $6 million . (2) Represents loans whose repayments are predominantly insured by the FHA or guaranteed by the VA. 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 $149 million at December 31, 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). 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 December 31, 2018 Commercial: Commercial and industrial $ 3,057 2,030 1,730 319 Real estate mortgage 1,228 1,032 1,009 154 Real estate construction 74 47 46 9 Lease financing 146 112 112 32 Total commercial 4,505 3,221 2,897 514 Consumer: Real estate 1-4 family first mortgage 12,309 10,738 4,420 525 Real estate 1-4 family juni

Premises, Equipment, Lease Comm

Premises, Equipment, Lease Commitments and Other Assets	12 Months Ended
	Dec. 31, 2018
Premises, Equipment, Lease Commitments, And Other Assets [Abstract]
Premises, Equipment, Lease Commitments and Other Assets	Note 7: Premises, Equipment, Lease Commitments and Other Assets Table 7.1: Premises and Equipment (in millions) Dec 31, 2018 Dec 31, 2017 Land $ 1,757 1,799 Buildings 8,974 8,865 Furniture and equipment 6,896 7,089 Leasehold improvements 2,387 2,291 Premises and equipment leased under capital leases 75 103 Total premises and equipment 20,089 20,147 Less: Accumulated depreciation and amortization 11,169 11,300 Net book value, premises and equipment $ 8,920 8,847 Depreciation and amortization expense for premises and equipment was $1.3 billion , $1.2 billion and $1.2 billion in 2018 , 2017 and 2016 , respectively. Dispositions of premises and equipment resulted in net gains of $32 million , $128 million and $44 million in 2018 , 2017 and 2016 , respectively, included in other noninterest expense. We have obligations under a number of noncancelable operating leases for premises and equipment. The leases predominantly expire over the next fifteen years, with the longest expiring in 2105 , and many provide for periodic adjustment of rentals based on changes in various economic indicators. Some leases also include a renewal option. Table 7.2 provides the future minimum payments of noncancelable operating leases, net of sublease income, with terms greater than one year as of December 31, 2018 . Table 7.2: Minimum Lease Payments of Operating Leases (in millions) Year ended December 31, 2019 $ 1,174 2020 1,056 2021 880 2022 713 2023 577 Thereafter 1,654 Total $ 6,054 Total minimum lease payments for operating leases above are net of $427 million of noncancelable sublease income. Operating lease rental expense (predominantly for premises) was $1.3 billion for the years 2018 , 2017 and 2016 , net of sublease income of $73 million , $76 million and $86 million for the same years, respectively. Table 7.3 presents the components of other assets. Table 7.3: Other Assets (in millions) Dec 31, 2018 Dec 31, 2017 Corporate/bank-owned life insurance $ 19,751 19,549 Accounts receivable (1) 34,281 39,127 Interest receivable 6,084 5,688 Core deposit intangibles — 769 Customer relationship and other amortized intangibles 545 841 Foreclosed assets: Residential real estate: Government insured/guaranteed (1) 88 120 Non-government insured/guaranteed 229 252 Non-residential real estate 134 270 Operating lease assets 9,036 9,666 Due from customers on acceptances 258 177 Other 9,444 13,785 Total other assets $ 79,850 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).

Equity Securities Equity Securi

Equity Securities Equity Securities	12 Months Ended
	Dec. 31, 2018
Equity Securities [Abstract]
Equity Securities	Note 8: Equity Securities Table 8.1 provides a summary of our equity securities by business purpose and accounting method, including equity securities with readily determinable fair values (marketable) and those without readily determinable fair values (nonmarketable). Table 8.1: Equity Securities (in millions) Dec 31, Dec 31, Held for trading at fair value: Marketable equity securities $ 19,449 30,004 Not held for trading: Fair value: Marketable equity securities (1) 4,513 4,356 Nonmarketable equity securities (2) 5,594 4,867 Total equity securities at fair value 10,107 9,223 Equity method: LIHTC (3) 10,999 10,269 Private equity 3,832 3,839 Tax-advantaged renewable energy 3,073 1,950 New market tax credit and other 311 294 Total equity method 18,215 16,352 Other: Federal Reserve Bank stock and other at cost (4) 5,643 5,828 Private equity (5) 1,734 1,090 Total equity securities not held for trading 35,699 32,493 Total equity securities (6) $ 55,148 62,497 (1) Includes $3.2 billion and $3.7 billion at December 31, 2018 and 2017 , respectively, related to securities held as economic hedges of our deferred compensation plan obligations. (2) Includes $5.5 billion and $4.9 billion at December 31, 2018 and 2017 , respectively, related to investments for which we elected the fair value option. See Note 18 (Fair Value of Assets and Liabilities) for additional information. (3) Represents low-income housing tax credit investments. (4) Includes $5.6 billion and $5.4 billion at December 31, 2018 and 2017 , respectively, 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. (6) At December 31, 2018 and 2017 , we held no securities of any single issuer with a book value that exceeded 10% of stockholder’s equity. Equity Securities Held for Trading Equity securities held for trading purposes are marketable equity securities traded on organized exchanges. These securities are held as part of our customer accommodation trading activities. For more information on these activities, see Note 4 (Trading Activities). 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 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. We have elected to account for nonmarketable equity securities under the fair value method, and substantially all of these securities are economically hedged with equity derivatives. EQUITY METHOD Our equity method investments consist of tax credit and private equity investments, 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 are 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. We recognized pre-tax losses of $1.2 billion for both 2018 and 2017 , related to our LIHTC investments. These losses were recognized in other noninterest income. We also recognized total tax benefits of $1.5 billion for both 2018 and 2017 , which included tax credits recorded to income taxes of $1.2 billion and $1.1 billion for the same periods, respectively. We are periodically required to provide additional financial support during the investment period. Our liability for unfunded commitments was $3.9 billion and $3.6 billion at December 31, 2018 and 2017 , respectively. 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 or measurement alternative method. Realized Gains and Losses Table 8.2 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 8.2: Net Gains (Losses) from Equity Securities Year ended December 31, (in millions) 2018 2017 2016 Net gains (losses) from equity securities carried at fair value: Marketable equity securities $ (389 ) 967 525 Nonmarketable equity securities 709 1,557 (21 ) Total equity securities carried at fair value 320 2,524 504 Net gains (losses) from nonmarketable equity securities not carried at fair value: Impairment write-downs (352 ) (339 ) (448 ) Net unrealized gains related to measurement alternative observable transactions 418 — — Net realized gains on sale 1,504 980 849 All other 33 97 73 Total nonmarketable equity securities not carried at fair value 1,603 738 474 Net gains (losses) from economic hedge derivatives (1) (408 ) (1,483 ) 125 Total net gains from equity securities $ 1,515 1,779 1,103 (1) Includes net gains (losses) on derivatives not designated as hedging instruments. Measurement Alternative Table 8.3 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 8.2 . Table 8.3: Measurement Alternative Year ended December 31, (in millions) 2018 Net gains (losses) recognized in earnings during the period: Gross unrealized gains due to observable price changes $ 443 Gross unrealized losses due to observable price changes (25 ) Impairment write-downs (33 ) Realized net gains from sale 274 Total net gains recognized during the period $ 659 The cumulative gross unrealized gains and (losses) due to observable price changes as of December 31, 2018 , were $415 million and $(25) million , respectively. Cumulative impairment losses as of December 31, 2018 , were $33 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 December 31, 2018 .

Securitizations and Variable In

Securitizations and Variable Interest Entities	12 Months Ended
	Dec. 31, 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. In a securitization transaction, assets are transferred to an SPE, which then issues to investors various forms of interests in those assets and may also enter into derivative transactions. In a securitization transaction where we transferred assets from our balance sheet, we typically receive cash and/or other interests in an SPE as proceeds for the assets we transfer. Also, in certain transactions, we may retain the right to service the transferred receivables and to repurchase those receivables from the SPE if the outstanding balance of the receivables falls to a level where the cost exceeds the benefits of servicing such receivables. In addition, we may purchase the right to service loans in an SPE that were transferred to the SPE by a third party. In connection with our securitization activities, we have various forms of ongoing involvement with SPEs, which may include: • underwriting securities issued by SPEs and subsequently making markets in those securities; • providing liquidity facilities to support short-term obligations of SPEs issued to third-party investors; • providing credit enhancement on securities issued by SPEs or market value guarantees of assets held by SPEs through the use of letters of credit, financial guarantees, credit default swaps and total return swaps; • entering into other derivative contracts with SPEs; • holding senior or subordinated interests in SPEs; • acting as servicer or investment manager for SPEs; and • providing administrative or trustee services to SPEs. SPEs formed in connection with securitization transactions are generally considered variable interest entities (VIEs). SPEs formed for other corporate purposes may be VIEs as well. A VIE is an entity that has either a total equity investment that is insufficient to finance its activities without additional subordinated financial support or whose equity investors lack the ability to control the entity’s activities or lack the ability to receive expected benefits or absorb obligations in a manner that’s consistent with their investment in the entity. A VIE is consolidated by its primary beneficiary, the party that has both the power to direct the activities that most significantly impact the VIE and a variable interest that could potentially be significant to the VIE. A variable interest is a contractual, ownership or other interest whose value changes with changes in the fair value of the VIE’s net assets. To determine whether or not a variable interest we hold could potentially be significant to the VIE, we consider both qualitative and quantitative factors regarding the nature, size and form of our involvement with the VIE. We assess whether or not we are the primary beneficiary of a VIE on an on-going basis. 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 December 31, 2018 Cash and due from banks $ — 139 — 139 Interest-earning deposits with banks — 8 — 8 Debt securities: Trading debt securities 2,110 45 200 2,355 Available-for-sale debt securities (1) 2,686 — 317 3,003 Held-to-maturity debt securities 510 — — 510 Loans 1,433 13,564 94 15,091 Mortgage servicing rights 14,761 — — 14,761 Derivative assets 53 — — 53 Equity securities 11,041 85 — 11,126 Other assets — 221 6 227 Total assets 32,594 14,062 617 47,273 Short-term borrowings — — 493 493 Derivative liabilities 26 — (2) — 26 Accrued expenses and other liabilities 231 191 (2) 8 430 Long-term debt 3,870 816 (2) 93 4,779 Total liabilities 4,127 1,007 594 5,728 Noncontrolling interests — 34 — 34 Net assets $ 28,467 13,021 23 41,511 December 31, 2017 Cash and due from banks $ — 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 December 31, 2018 Residential mortgage loan securitizations: Conforming (2) $ 1,172,833 2,377 13,811 — (171 ) 16,017 Other/nonconforming 10,596 453 57 — — 510 Commercial mortgage securitizations 153,350 2,409 893 (22 ) (40 ) 3,240 Collateralized debt obligations: Debt securities 659 — — 5 (20 ) (15 ) Loans (3) — — — — — — Asset-based finance structures 304 205 — — — 205 Tax credit structures 35,185 12,087 — — (3,870 ) 8,217 Collateralized loan obligations 2 — — — — — Investment funds 185 42 — — — 42 Other (4) 1,688 207 — 44 — 251 Total $ 1,374,802 17,780 14,761 27 (4,101 ) 28,467 Maximum exposure to loss Debt and equity interests (1) Servicing assets Derivatives Other commitments and guarantees Total exposure Residential mortgage loan securitizations: Conforming $ 2,377 13,811 — 1,183 17,371 Other/nonconforming 453 57 — — 510 Commercial mortgage securitizations 2,409 893 28 11,563 14,893 Collateralized debt obligations: Debt securities — — 5 20 25 Loans (3) — — — — — Asset-based finance structures 205 — — 71 276 Tax credit structures 12,087 — — 1,420 13,507 Collateralized loan obligations — — — — — Investment funds 42 — — — 42 Other (4) 207 — 45 158 410 Total $ 17,780 14,761 78 14,415 47,034 (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 $11.0 billion and $10.7 billion at December 31, 2018 and 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 $1.2 billion and $2.2 billion at December 31, 2018 and 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. At December 31, 2017, also contains investments in auction rate securities (ARS) issued by VIEs that we did 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. RESIDENTIAL MORTGAGE LOANS Residential mortgage loan securitizations are financed through the issuance of fixed-rate or floating-rate asset-backed securities, which are collateralized by the loans transferred to a VIE. We typically transfer loans we originated to these VIEs, account for the transfers as sales, retain the right to service the loans and may hold other beneficial interests issued by the VIEs. We also may be exposed to limited liability related to recourse agreements and repurchase agreements we make to our issuers and purchasers, which are included in other commitments and guarantees. In certain instances, we may service residential mortgage loan securitizations structured by third parties whose loans we did not originate or transfer. Our residential mortgage loan securitizations consist of conforming and nonconforming securitizations. Conforming residential mortgage loan securitizations are those that are guaranteed by the GSEs, including GNMA. Because of the power of the GSEs over the VIEs that hold the assets from these conforming residential mortgage loan securitizations, we do not consolidate them. The loans sold to the VIEs in nonconforming residential mortgage loan securitizations are those that do not qualify for a GSE guarantee. We may hold variable interests issued by the VIEs, including senior securities. We do not consolidate the nonconforming residential mortgage loan securitizations included in the table because we either do not hold any variable interests, hold variable interests that we do not consider potentially significant or are not the primary servicer for a majority of the VIE assets. Other commitments and guarantees include amounts related to loans sold that we may be required to repurchase, or otherwise indemnify or reimburse the investor or insurer for losses incurred, due to material breach of contractual representations and warranties as well as other retained recourse arrangements. The maximum exposure to loss for material breach of contractual representations and warranties represents a stressed case estimate we utilize for determining stressed case regulatory capital needs and is considered to be a remote scenario. COMMERCIAL MORTGAGE LOAN SECURITIZATIONS Commercial mortgage loan securitizations are financed through the issuance of fixed or floating-rate asset-backed securities, which are collateralized by the loans transferred to the VIE. In a typical securitization, we may transfer loans we originate to these VIEs, account for the transfers as sales, retain the right to service the loans and may hold other beneficial interests issued by the VIEs. In certain instances, we may service commercial mortgage loan securitizations structured by third parties whose loans we did not originate or transfer. We typically serve as primary or master servicer of these VIEs. The primary or master servicer in a commercial mortgage loan securitization typically cannot make the most significant decisions impacting the performance of the VIE and therefore does not have power over the VIE. We do not consolidate the commercial mortgage loan securitizations included in the disclosure because we either do not have power or do not have a variable interest that could potentially be significant to the VIE. COLLATERALIZED DEBT OBLIGATIONS (CDOs) A CDO is a securitization where a VIE purchases a pool of assets consisting of asset-backed securities and issues multiple tranches of equity or notes to investors. In some CDOs, a portion of the assets are obtained synthetically through the use of derivatives such as credit default swaps or total return swaps. In addition to our role as arranger, we may have other forms of involvement with these CDOs. Such involvement may include acting as liquidity provider, derivative counterparty, secondary market maker or investor. For certain CDOs, we may also act as the collateral manager or servicer. We receive fees in connection with our role as collateral manager or servicer. We assess whether we are the primary beneficiary of CDOs based on our role in them in combination with the variable interests we hold. Subsequently, we monitor our ongoing involvement to determine if the nature of our involvement has changed. We are not the primary beneficiary of these CDOs in most cases because we do not act as the collateral manager or servicer, which generally denotes power. In cases where we are the collateral manager or servicer, we are not the primary beneficiary because we do not hold interests that could potentially be significant to the VIE. COLLATERALIZED LOAN OBLIGATIONS (CLOs) A CLO is a securitization where an SPE purchases a pool of assets consisting of loans and issues multiple tranches of equity or notes to investors. Generally, CLOs are structured on behalf of a third-party asset manager that typically selects and manages the assets for the term of the CLO. Typically, the asset manager has the power over the significant decisions of the VIE through its discretion to manage the assets of the CLO. We assess whether we are the primary beneficiary of CLOs based on our role in them and the variable interests we hold. In most cases, we are not the primary beneficiary because we do not have the power to manage the collateral in the VIE. In addition to our role as arranger, we may have other forms of involvement with these CLOs. Such involvement may include acting as underwriter, derivative counterparty, secondary market maker or investor. For certain CLOs, we may also act as the servicer, for which we receive fees in connection with that role. We also earn fees for arranging these CLOs and distributing the securities. ASSET-BASED FINANCE STRUCTURES We engage in various forms of structured finance arrangements with VIEs that are collateralized by various asset classes including energy contracts, automobile and other transportation loans and leases, intellectual property, equipment and general corporate credit. We typically provide senior financing, and may act as an interest rate swap or commodity derivative counterparty when necessary. In most cases, we are not the primary beneficiary of these structures because we do not have power over the significant activities of the VIEs involved in them. For example, we have investments in asset-backed securities that are collateralized by automobile leases or loans and cash. These fixed-rate and variable-rate securities have been structured as single-tranche, fully amortizing, unrated bonds that are equivalent to investment-grade securities due to their significant overcollateralization. The securities are issued by VIEs that have been formed by third-party automobile financing institutions primarily because they require a source of liquidity to fund ongoing vehicle sales operations. The third-party automobile financing institutions manage the collateral in the VIEs, which is indicative of power in them and we therefore do not consolidate these VIEs. TAX CREDIT STRUCTURES We co-sponsor and make investments in affordable housing and sustainable energy projects that are designed to generate a return primarily through the realization of federal tax credits. In some instances, our investments in these structures may require that we fund future capital commitments at the discretion of the project sponsors. While the size of our investment in a single entity may at times exceed 50% of the outstanding equity interests, we do not consolidate these structures due to the project sponsor’s ability to manage the projects, which is indicative of power in them. INVESTMENT 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 2018 , 2017 and 2016 was $45 million , $53 million , and $109 million , respectively. 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 December 31, 2018 , we held no 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. All ARS were sold during 2018. We did not consolidate the VIEs that issued the ARS because we did 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 December 31, 2018 and 2017 , we reported the debt securities issued to the VIEs as long-term junior subordinated debt with a carrying value of $2.0 billion at both dates, 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. In 2017, we redeemed $150 million of trust preferred securities which were partially included in Tier 2 capital (50% credit in 2017) in the transitional framework and were not included under the fully-phased framework under the Basel III standards. 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 in which we have a continuing involvement with the transferred financial assets. Table 9.3: Cash Flows From Sales and Securitization Activity Year ended December 31, 2018 2017 2016 (in millions) Mortgage loans Other financial assets Mortgage loans Other financial assets Mortgage loans Other financial assets Proceeds from securitizations and whole loan sales $ 193,721 — 228,282 25 252,723 347 Fees from servicing rights retained 3,337 — 3,352 — 3,492 — Cash flows from other interests held (1) 698 1 2,218 1 2,898 1 Repurchases of assets/loss reimbursements (2): Non-agency securitizations and whole loan transactions 3 — 12 — 26 — Agency securitizations (3) 96 — 92 — 133 — Servicing advances, net of repayments (154 ) — (269 ) — (218 ) — (1) Cash flows from other interests held include principal and interest payments received on retained bonds and excess cash flows received on interest-only strips. (2) Consists of cash paid to repurchase loans from investors and cash paid to investors to reimburse them for losses on individual loans that are already liquidated. In addition, during 2018 and 2017 , we paid nothing to third-party investors to settle repurchase liabilities on pools of loans, compared with $11 million in 2016 . (3) Represent loans repurchased from GNMA, FNMA, and FHLMC under representation and warranty provisions included in our loan sales contracts. Excludes $7.8 billion in delinquent insured/guaranteed loans that we service and have exercised our option to purchase out of GNMA pools in 2018 , compared with $8.6 billion and $9.9 billion in 2017 and 2016 , respectively. These loans are predominantly insured by the FHA or guaranteed by the VA. In 2018 , 2017 , and 2016 , we recognized net gains of $270 million , $701 million and $524 million , respectively, from transfers accounted for as sales of financial assets, in which we have a continuing involvement with the transferred assets. These net gains largely relate to commercial mortgage securitizations, and residential mortgage securitizations where the loans were not already carried at fair value. Sales with continuing involvement during 2018 , 2017 and 2016 largely 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 2018 , 2017 and 2016 we transferred $177.8 billion , $213.6 billion and $236.6 billion , respectively, in fair value of residential mortgages to unconsolidated VIEs and third-party investors and recorded the transfers as sales. Substantially all of these transfers did not result in a gain or loss because the loans were already carried at fair value. In connection with all of these transfers, in 2018 we recorded a $1.9 billion servicing asset, measured at fair value using a Level 3 measurement technique, securities of $5.0 billion , classified as Level 2, and a $17 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 2017 , we recorded a $2.1 billion servicing asset, securities of $1.4 billion and a $24 million liability. In 2016 , we recorded a $2.1 billion servicing asset, securities of $4.4 billion and a $36 million liability. Table 9.4 presents the key weighted-average assumptions we used to measure residential mortgage servicing rights at the date of securitization. Table 9.4: Residential Mortgage Servicing Rights Residential mortgage servicing rights 2018 2017 2016 Year ended December 31, Prepayment speed (1) 10.6 % 11.5 11.7 Discount rate 7.4 7.0 6.5 Cost to service ($ per loan) (2) $ 128 132 132 (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 2018 , 2017 and 2016 , we transferred $17.9 billion , $16.7 billion and $18.3 billion , respectively, in carrying value of commercial mortgages to unconsolidated VIEs and third-party investors and recorded the transfers as sales. These transfers resulted in gains of $280 million in 2018 , $359 million in 2017 and $429 million in 2016 , respectively, because the loans were carried at lower of cost or fair value (LOCOM). In connection with these transfers, in 2018 we recorded a servicing asset of $158 million , initially measured at fair value using a Level 3 measurement technique, and securities of $81 million , classified as Level 2. In 2017 , we recorded a servicing asset of $166 million and securities of $65 million . In 2016 , we recorded a servicing asset of $270 million and securities of $258 million . Retained Interests from Unconsolidated VIEs Table 9.5 provides key economic assumptions and the sensitivity of the current fair value of residential mortgage servicing rights and other interests held to immediate adverse changes in those assumptions. “Other interests held” relate to residential and commercial mortgage loan securitizations. Residential mortgage-backed securities retained in securitizations issued through GSEs, such as FNMA, FHLMC and GNMA, are excluded from the table because these securities have a remote risk of credit loss due to the GSE guarantee. These securities also have economic characteristics similar to GSE mortgage-backed securities that we purchase, which are not included in the table. Subordinated interests include only those bonds whose credit rating was below AAA by a major rating agency at issuance. Senior interests include only those bonds whose credit rating was AAA by a major rating agency at issuance. The information presented excludes trading positions held in inventory. Table 9.5: Retained Interests from Unconsolidated VIEs Other interests held Residential mortgage servicing rights (1) Interest-only strips Commercial (2) ($ in millions, except cost to service amounts) Subordinated bonds Senior bonds Fair value of interests held at December 31, 2018 $ 14,649 16 668 309 Expected weighted-average life (in years) 6.5 3.6 7.0 5.7 Key economic assumptions: Prepayment speed assumption (3) 9.9 % 17.7 Decrease in fair value from: 10% adverse change $ 530 1 25% adverse change 1,301 1 Discount rate assumption 8.1 % 14.5 4.3 3.7 Decrease in fair value from: 100 basis point increase $ 615 — 37 14 200 basis point increase 1,176 1 72 28 Cost to service assumption ($ per loan) 106 Decrease in fair value from: 10% adverse change 316 25% adverse change 787 Credit loss assumption 5.1 % — 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 re

Mortgage Banking Activities

Mortgage Banking Activities	12 Months Ended
	Dec. 31, 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 Year ended December 31, (in millions) 2018 2017 2016 Fair value, beginning of year $ 13,625 12,959 12,415 Purchases — 541 — Servicing from securitizations or asset transfers (1) 2,010 2,263 2,204 Sales and other (2) (71 ) (23 ) (65 ) Net additions 1,939 2,781 2,139 Changes in fair value: Due to changes in valuation model inputs or assumptions: Mortgage interest rates (3) 1,337 (103 ) 543 Servicing and foreclosure costs (4) 818 96 106 Discount rates (5) (830 ) 13 — Prepayment estimates and other (6) (365 ) (132 ) (84 ) Net changes in valuation model inputs or assumptions 960 (126 ) 565 Changes due to collection/realization of expected cash flows over time (1,875 ) (1,989 ) (2,160 ) Total changes in fair value (915 ) (2,115 ) (1,595 ) Fair value, end of year $ 14,649 13,625 12,959 (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. The amount for the year ended December 31, 2018, reflects updated information obtained regarding market participants’ views of servicing and foreclosure costs. (5) Reflects discount rate assumption change, excluding portion attributable to changes in mortgage interest rates. The amount for the year ended December 31, 2018, reflects updated information obtained regarding market participants’ views of discount 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 Year ended December 31, (in millions) 2018 2017 2016 Balance, beginning of year $ 1,424 1,406 1,308 Purchases 127 115 97 Servicing from securitizations or asset transfers 158 166 270 Amortization (266 ) (263 ) (269 ) Balance, end of year (1) $ 1,443 1,424 1,406 Fair value of amortized MSRs: Beginning of year $ 2,025 1,956 1,680 End of year 2,288 2,025 1,956 (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) Dec 31, 2018 Dec 31, 2017 Residential mortgage servicing: Serviced for others $ 1,164 1,209 Owned loans serviced 334 342 Subserviced for others 4 3 Total residential servicing 1,502 1,554 Commercial mortgage servicing: Serviced for others 543 495 Owned loans serviced 121 127 Subserviced for others 9 9 Total commercial servicing 673 631 Total managed servicing portfolio $ 2,175 2,185 Total serviced for others $ 1,707 1,704 Ratio of MSRs to related loans serviced for others 0.94 % 0.88 Table 10.4 presents the components of mortgage banking noninterest income. Table 10.4: Mortgage Banking Noninterest Income Year ended December 31, (in millions) 2018 2017 2016 Servicing income, net: Servicing fees: Contractually specified servicing fees $ 3,613 3,603 3,778 Late charges 162 172 180 Ancillary fees 182 199 229 Unreimbursed direct servicing costs (1) (331 ) (582 ) (819 ) Net servicing fees 3,626 3,392 3,368 Changes in fair value of MSRs carried at fair value: Due to changes in valuation model inputs or assumptions (2) (A) 960 (126 ) 565 Changes due to collection/realization of expected cash flows over time (1,875 ) (1,989 ) (2,160 ) Total changes in fair value of MSRs carried at fair value (915 ) (2,115 ) (1,595 ) Amortization (266 ) (263 ) (269 ) Net derivative gains (losses) from economic hedges (3) (B) (1,072 ) 413 261 Total servicing income, net 1,373 1,427 1,765 Net gains on mortgage loan origination/sales activities 1,644 2,923 4,331 Total mortgage banking noninterest income $ 3,017 4,350 6,096 Market-related valuation changes to MSRs, net of hedge results (2)(3) (A)+(B) $ (112 ) 287 826 (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 17 (Derivatives) for additional discussion and detail.

Intangible Assets

Intangible Assets	12 Months Ended
	Dec. 31, 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 December 31, 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) $ 4,161 (2,718 ) 1,443 3,876 (2,452 ) 1,424 Core deposit intangibles 12,834 (12,834 ) — 12,834 (12,065 ) 769 Customer relationship and other intangibles 3,994 (3,449 ) 545 3,994 (3,153 ) 841 Total amortized intangible assets $ 20,989 (19,001 ) 1,988 20,704 (17,670 ) 3,034 Unamortized intangible assets: MSRs (carried at fair value) (2) $ 14,649 13,625 Goodwill 26,418 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 December 31, 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 Year ended December 31, 2018 (actual) $ 266 769 299 1,334 Estimate for year ended December 31, 2019 $ 260 — 116 376 2020 233 — 97 330 2021 200 — 83 283 2022 178 — 69 247 2023 150 — 59 209 (1) The year ended December 31, 2018 , balance includes $10 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 (2) — (116 ) — (116 ) Reduction in goodwill related to divested businesses and other (2) — (14 ) — (14 ) Goodwill from business combinations — — 24 24 December 31, 2017 (1) $ 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 (9 ) (5 ) — (14 ) December 31, 2018 (1) $ 16,685 8,450 1,283 26,418 (1) At December 31, 2017 , other assets included Goodwill classified as held-for-sale of $13 million related to the sales agreement for Wells Fargo Shareowner Services. At December 31, 2018 , there was no Goodwill classified as held-for-sale in other assets. (2) The prior period has been revised to conform with the current period presentation. We assess goodwill for impairment at a reporting unit level, which is one level below the operating segments. Our goodwill was not impaired at December 31, 2018 and 2017 . The fair values exceeded the carrying amount of our respective reporting units by approximately 42% to 544% at December 31, 2018 . See Note 26 (Operating Segments) for further information on management reporting.

Deposits

Deposits	12 Months Ended
	Dec. 31, 2018
Deposits [Abstract]
Deposits	Note 12: Deposits Table 12.1 presents a summary of the time certificates of deposit (CDs) and other time deposits issued by domestic and foreign offices. Table 12.1: Time Certificates of Deposits and Other Time Deposits Dec 31, Dec 31, (in billions) 2018 2017 Total domestic and foreign $ 130.6 128.6 Domestic: $100,000 or more 42.5 52.7 $250,000 or more 37.1 46.9 Foreign: $100,000 or more 4.6 13.4 $250,000 or more 4.6 13.4 Substantially all CDs and other time deposits issued by domestic and foreign offices were interest bearing and a significant portion of our foreign time deposits with a denomination of $100,000 or more have maturities of less than 7 days. The contractual maturities of these deposits are presented in Table 12.2 . Table 12.2: Contractual Maturities of CDs and Other Time Deposits (in millions) December 31, 2018 2019 $ 88,435 2020 25,986 2021 6,324 2022 3,320 2023 2,868 Thereafter 3,712 Total $ 130,645 The contractual maturities of the domestic time deposits with a denomination of $100,000 or more are presented in Table 12.3 . Table 12.3: Contractual Maturities of Domestic Time Deposits (in millions) 2018 Three months or less $ 13,724 After three months through six months 12,292 After six months through twelve months 12,945 After twelve months 3,504 Total $ 42,465 Demand deposit overdrafts of $624 million and $371 million were included as loan balances at December 31, 2018 and 2017 , respectively.

Short-Term Borrowings

Short-Term Borrowings	12 Months Ended
	Dec. 31, 2018
Short-term Debt [Abstract]
Short-Term Borrowings	Note 13: Short-Term Borrowings Table 13.1 shows selected information for short-term borrowings, which generally mature in less than 30 days . We pledge certain financial instruments that we own to collateralize repurchase agreements and other securities financings. For additional information, see the “Pledged Assets” section of Note 15 (Guarantees, Pledged Assets and Collateral, and Other Commitments). Table 13.1: Short-Term Borrowings 2018 2017 2016 (in millions) Amount Rate Amount Rate Amount Rate As of December 31, Federal funds purchased and securities sold under agreements to repurchase $ 92,430 2.65 % $ 88,684 1.30 % $ 78,124 0.17 % Commercial paper — — — — 120 0.93 Other short-term borrowings 13,357 1.63 14,572 0.72 18,537 0.28 Total $ 105,787 2.52 $ 103,256 1.22 $ 96,781 0.19 Year ended December 31, Average daily balance Federal funds purchased and securities sold under agreements to repurchase $ 90,348 1.78 $ 82,507 0.90 $ 99,955 0.33 Commercial paper — — 16 0.95 256 0.86 Other short-term borrowings 13,919 0.79 16,399 0.13 14,976 0.02 Total $ 104,267 1.65 $ 98,922 0.77 $ 115,187 0.29 Maximum month-end balance Federal funds purchased and securities sold under agreements to repurchase (1) $ 93,918 N/A $ 91,604 N/A $ 109,645 N/A Commercial paper (2) — N/A 78 N/A 519 N/A Other short-term borrowings (3) 16,924 N/A 19,439 N/A 18,537 N/A N/A- Not applicable (1) Highest month-end balance in each of the last three years was November 2018 , November 2017 and October 2016 . (2) There were no month-end balances in 2018; highest month-end balance in the remaining years was January 2017 and March 2016 . (3) Highest month-end balance in each of the last three years was January 2018 , February 2017 and December 2016 .

Long-Term Debt

Long-Term Debt	12 Months Ended
	Dec. 31, 2018
Long-term Debt, Current and Noncurrent [Abstract]
Long-Term Debt	Note 14: Long-Term Debt We issue long-term debt denominated in multiple currencies, largely in U.S. dollars. Our issuances have both fixed and floating interest rates. As a part of our overall interest rate risk management strategy, we often use derivatives to manage our exposure to interest rate risk. We also use derivatives to manage our exposure to foreign currency risk. As a result, approximately half of the long-term debt presented below is hedged in a fair value or cash flow hedge relationship. See Note 17 (Derivatives) for further information on qualifying hedge contracts. Table 14.1 presents a summary of our long-term debt carrying values, reflecting unamortized debt discounts and premiums, and purchase accounting adjustments, where applicable. The interest rates displayed represent the range of contractual rates in effect at December 31, 2018 . These interest rates do not include the effects of any associated derivatives designated in a hedge accounting relationship. Table 14.1: Long-Term Debt December 31, 2018 2017 (in millions) Maturity date(s) Stated interest rate(s) Wells Fargo & Company (Parent only) Senior Fixed-rate notes (1) 2019-2045 0.38-6.75% $ 77,742 84,652 Floating-rate notes 2019-2048 0.10-4.08% 19,553 22,463 FixFloat notes 2028 3.58% 2,901 2,961 Structured notes (2) 2019-2056 7,984 7,442 Total senior debt - Parent 108,180 117,518 Subordinated Fixed-rate notes (3) 2023-2046 3.45-7.57% 25,428 27,132 Total subordinated debt - Parent 25,428 27,132 Junior subordinated Fixed-rate notes - hybrid trust securities 2029-2036 5.95-7.95% 1,308 1,369 Floating-rate notes 2027 2.94-3.44% 308 299 Total junior subordinated debt - Parent (4) 1,616 1,668 Total long-term debt - Parent (3) 135,224 146,318 Wells Fargo Bank, N.A. and other bank entities (Bank) Senior Fixed-rate notes 2019-2023 1.75-3.63% 14,222 7,732 Floating-rate notes 2019-2053 2.33-3.57% 6,617 4,317 FixFloat notes 2021 3.33% 1,998 — Fixed-rate advances - Federal Home Loan Bank (FHLB) (5) 2019-2031 3.83-7.50% 51 62 Floating-rate advances - FHLB (5) 2019-2021 2.44-3.28% 53,825 47,825 Structured notes (2) 2019-2037 1,646 743 Capital leases 2019-2029 2.87-17.78% 36 39 Total senior debt - Bank 78,395 60,718 Subordinated Fixed-rate notes 2023-2038 5.25-7.74% 5,199 5,408 Total subordinated debt - Bank 5,199 5,408 Junior subordinated Floating-rate notes 2027 3.09-3.19% 352 342 Total junior subordinated debt - Bank (4) 352 342 Long-term debt issued by VIE - Fixed rate (6) 2020-2047 6.00% 160 268 Long-term debt issued by VIE - Floating rate (6) 2020-2047 2.46-13.02% 656 1,211 Mortgage notes and other debt (7) 2019-2057 0.20-9.20% 6,637 7,291 Total long-term debt - Bank 91,399 75,238 (continued on following page) (continued from previous page) December 31, 2018 2017 (in millions) Maturity date(s) Stated interest rate(s) Other consolidated subsidiaries Senior Fixed-rate notes 2019-2023 2.94-3.46% 2,383 3,390 Structured notes (2) 2021-2028 6 1 Total senior debt - Other consolidated subsidiaries 2,389 3,391 Mortgage notes and other (7) 2026 4.08% 32 73 Total long-term debt - Other consolidated subsidiaries 2,421 3,464 Total long-term debt $ 229,044 225,020 (1) Includes $59 million of outstanding zero coupon callable notes at December 31, 2018. (2) Included in the table are certain structured notes that have coupon or repayment terms linked to the performance of debt or equity securities, an embedded equity, commodity, or currency index, or basket of indices accounted for separately from the note as a free-standing derivative, and the maturity may be accelerated based on the value of a referenced index or security. For information on embedded derivatives, see the “Derivatives Not Designated as Hedging Instruments” section in Note 17 (Derivatives). In addition, a major portion consists of zero coupon callable notes where interest is paid as part of the final redemption amount. (3) Includes fixed-rate subordinated notes issued by the Parent at a discount of $131 million and $133 million in 2018 and 2017 , respectively, and debt issuance costs of $2 million in both 2018 and 2017, to effect a modification of Wells Fargo Bank, NA notes. These subordinated notes are carried at their par amount on the balance sheet of the Parent presented in Note 27 (Parent-Only Financial Statements). In addition, Parent long-term debt presented in Note 27 also includes affiliate related issuance costs of $278 million and $323 million in 2018 and 2017, respectively. (4) Represents junior subordinated debentures held by unconsolidated wholly-owned trusts formed for the sole purpose of issuing trust preferred securities. See Note 9 (Securitizations and Variable Interest Entities) for additional information on our trust preferred security structures. (5) At December 31, 2018 and 2017 , FHLB advances were secured by residential loan collateral. (6) For additional information on VIEs, see Note 9 (Securitizations and Variable Interest Entities). (7) A major portion related to securitizations and secured borrowings, see Note 9 (Securitizations and Variable Interest Entities). We issue long-term debt in a variety of maturities and currencies to achieve cost-efficient funding and to maintain an appropriate maturity profile. Long-term debt of $229.0 billion at December 31, 2018 , increased $4.0 billion from December 31, 2017. We issued $47.6 billion of long-term debt in 2018. The aggregate carrying value of long-term debt that matures (based on contractual payment dates) as of December 31, 2018 , in each of the following five years and thereafter is presented in Table 14.2 . Table 14.2: Maturity of Long-Term Debt December 31, 2018 (in millions) 2019 2020 2021 2022 2023 Thereafter Total Wells Fargo & Company (Parent Only) Senior notes $ 6,713 13,459 17,923 17,772 10,932 41,381 108,180 Subordinated notes — — — — 3,544 21,884 25,428 Junior subordinated notes — — — — — 1,616 1,616 Total long-term debt - Parent 6,713 13,459 17,923 17,772 14,476 64,881 135,224 Wells Fargo Bank, N.A. and other bank entities (Bank) Senior notes 36,653 18,498 20,218 40 2,807 179 78,395 Subordinated notes — — — — 1,043 4,156 5,199 Junior subordinated notes — — — — — 352 352 Securitizations and other bank debt 2,084 1,647 574 268 119 2,761 7,453 Total long-term debt - Bank 38,737 20,145 20,792 308 3,969 7,448 91,399 Other consolidated subsidiaries Senior notes 1,097 — 920 — 367 5 2,389 Securitizations and other bank debt — — — — — 32 32 Total long-term debt - Other consolidated subsidiaries 1,097 — 920 — 367 37 2,421 Total long-term debt $ 46,547 33,604 39,635 18,080 18,812 72,366 229,044 As part of our long-term and short-term borrowing arrangements, we are subject to various financial and operational covenants. Some of the agreements under which debt has been issued have provisions that may limit the merger or sale of certain subsidiary banks and the issuance of capital stock or convertible securities by certain subsidiary banks. At December 31, 2018 , we were in compliance with all the covenants.

Guarantees, Pledged Assets and

Guarantees, Pledged Assets and Collateral, and Other Commitments	12 Months Ended
	Dec. 31, 2018
Guarantees [Abstract]
Guarantees, Pledged Assets and Collateral, and Other Commitments	Note 15: 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. Table 15.1 shows carrying value, maximum exposure to loss on our guarantees and the related non-investment grade amounts. Table 15.1: 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 December 31, 2018 Standby letters of credit (1) $ 40 14,636 7,897 3,398 497 26,428 8,027 Securities lending and other indemnifications (2) — — 1 — 1,044 1,045 1 Written put options (3) (185 ) 17,243 10,502 3,066 400 31,211 21,732 Loans and MLHFS sold with recourse (4) 54 104 653 1,207 10,163 12,127 9,079 Factoring guarantees — 889 — — — 889 751 Other guarantees 1 — — 3 2,959 2,962 1 Total guarantees $ (90 ) 32,872 19,053 7,674 15,063 74,662 39,591 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 — 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 $7.5 billion and $8.1 billion at December 31, 2018 and 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 $70 million and $92 million with related collateral of $974 million and $717 million at December 31, 2018 and 2017 , respectively. Estimated maximum exposure to loss was $1.0 billion at December 31, 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 17 (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 $3 million and $5 million of loans associated with these agreements during 2018 and 2017 , respectively. “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 15.1 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. STANDBY LETTERS OF CREDIT We issue standby letters of credit, which include performance and financial guarantees, for customers in connection with contracts between our customers and third parties. Standby letters of credit are agreements where we are obligated to make payment to a third party on behalf of a customer if the customer fails to meet their contractual obligations. We consider the credit risk in standby letters of credit and commercial and similar letters of credit in determining the allowance for credit losses. SECURITIES LENDING AND OTHER INDEMNIFICATIONS As a securities lending agent, we lend debt and equity securities from participating institutional clients’ portfolios to third-party borrowers. These arrangements are for an indefinite period of time, and we indemnify our clients against default by the borrower in returning these lent securities. This indemnity is supported by collateral received from the borrowers and is generally in the form of cash or highly liquid securities that are marked to market daily. We use certain third-party clearing agents to clear and settle transactions on behalf of some of our institutional brokerage customers. We indemnify the clearing agents against loss that could occur for non-performance by our customers on transactions that are not sufficiently collateralized. Transactions subject to the indemnifications may include customer obligations related to the settlement of margin accounts and short positions, such as written call options and securities borrowing transactions. We enter into other types of indemnification agreements in the ordinary course of business under which we agree to indemnify third parties against any damages, losses and expenses incurred in connection with legal and other proceedings arising from relationships or transactions with us. These relationships or transactions include those arising from service as a director or officer of the Company, underwriting agreements relating to our securities, acquisition agreements and various other business transactions or arrangements. Because the extent of our obligations under these agreements depends entirely upon the occurrence of future events, we are unable to determine our potential future liability under these agreements. We do, however, record a liability for residential mortgage loans that we expect to repurchase pursuant to various representations and warranties. WRITTEN PUT OPTIONS Written put options are contracts that give the counterparty the right to sell to us an underlying instrument held by the counterparty at a specified price and may include options, floors, caps and credit default swaps. These written put option contracts generally permit net settlement. While these derivative transactions expose us to risk if the option is exercised, we manage this risk by entering into offsetting trades or by taking short positions in the underlying instrument. We offset market risk related to put options written to customers with cash securities or other offsetting derivative transactions. Additionally, for certain of these contracts, we require the counterparty to pledge the underlying instrument as collateral for the transaction. Our ultimate obligation under written put options is based on future market conditions and is only quantifiable at settlement. See Note 17 (Derivatives) for additional information regarding written derivative contracts. LOANS AND MLHFS SOLD WITH RECOURSE In certain sales and securitizations of loans, including mortgage loans, we provide recourse to the buyer whereby we are required to indemnify the buyer for any loss on the loan up to par value plus accrued interest. We provide recourse, predominantly to GSEs, on loans sold under various programs and arrangements. Substantially all of these programs and arrangements require that we share in the loans’ credit exposure for their remaining life by providing recourse to the GSE, up to 33.33% of actual losses incurred on a pro-rata basis in the event of borrower default. Under the remaining recourse programs and arrangements, if certain events occur within a specified period of time from transfer date, we have to provide limited recourse to the buyer to indemnify them for losses incurred for the remaining life of the loans. The maximum exposure to loss reported in Table 15.1 represents the outstanding principal balance of the loans sold or securitized that are subject to recourse provisions or the maximum losses per the contractual agreements. However, we believe the likelihood of loss of the entire balance due to these recourse agreements is remote, and amounts paid can be recovered in whole or in part from the sale of collateral. We also provide representation and warranty guarantees on loans sold under the various recourse programs and arrangements. Our loss exposure relative to these guarantees is separately considered and provided for, as necessary, in determination of our liability for loan repurchases due to breaches of representation and warranties. FACTORING GUARANTEES Under certain factoring arrangements, we may be required to purchase trade receivables from third parties, if receivable debtors default on their payment obligations. OTHER GUARANTEES We are members of exchanges and clearing houses that we use to clear our trades and those of our customers. It is common that all members in these organizations are required to collectively guarantee the performance of other members. Our obligations under the guarantees are based on either a fixed amount or a multiple of the collateral we are required to maintain with these organizations. We have not recorded a liability for these arrangements as of the dates presented in Table 15.1 because we believe the likelihood of loss is remote. We also have contingent performance arrangements related to various customer relationships and lease transactions. We are required to pay the counterparties to these agreements if third parties default on certain obligations. 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 15.2 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 $14.1 billion and $13.6 billion at December 31, 2018 and 2017 , respectively, which can only be used to settle the liabilities of those entities. The table also excludes $617 million and $675 million in assets pledged in transactions with VIE’s accounted for as secured borrowings at December 31, 2018 and 2017 , respectively. See Note 9 (Securitizations and Variable Interest Entities) for additional information on consolidated VIE assets and secured borrowings. Table 15.2: Pledged Assets Dec 31, Dec 31, (in millions) 2018 2017 Held for trading: Debt securities $ 96,616 96,993 Equity securities 9,695 12,161 Total pledged assets held for trading (1) 106,311 109,154 Not held for trading: Debt securities and other (2) 62,438 73,592 Mortgage loans held for sale and loans (3) 453,894 469,554 Total pledged assets not held for trading 516,332 543,146 Total pledged assets $ 622,643 652,300 (1) Consists of pledged assets held for trading of $45.5 billion and $41.9 billion at December 31, 2018 and 2017 , respectively, and off-balance sheet securities of $60.8 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 $106.2 billion and $109.0 billion at December 31, 2018 and 2017 , respectively, that permit the secured parties to sell or repledge the collateral. (2) Includes carrying value of $4.2 billion and $5.0 billion (fair value of $4.1 billion and $5.0 billion ) in collateral for repurchase agreements at December 31, 2018 and 2017 , respectively, which are pledged under agreements that do not permit the secured parties to sell or repledge the collateral. Also includes $68 million and $64 million in collateral pledged under repurchase agreements at December 31, 2018 and 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 $ 7.4 billion and $2.6 billion at December 31, 2018 and 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 $1.2 billion and $2.2 billion at December 31, 2018 and 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 SECURITIES FINANCING ACTIVITIES Table 15.3 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 15.3 , we also have balance sheet netting related to derivatives that is disclosed in Note 17 (Derivatives). Table 15.3: Offsetting – Securities Financing Activities Dec 31, Dec 31, (in millions) 2018 2017 Assets: Resale and securities borrowing agreements Gross amounts recognized $ 112,662 121,135 Gross amounts offset in consolidated balance sheet (1) (15,258 ) (23,188 ) Net amounts in consolidated balance sheet (2) 97,404 97,947 Collateral not recognized in consolidated balance sheet (3) (96,734 ) (96,829 ) Net amount (4) $ 670 1,118 Liabilities: Repurchase and securities lending agreements Gross amounts recognized (5) $ 106,248 111,488 Gross amounts offset in consolidated balance sheet (1) (15,258 ) (23,188 ) Net amounts in consolidated balance sheet (6) 90,990 88,300 Collateral pledged but not netted in consolidated balance sheet (7) (90,798 ) (87,918 ) Net amount (8) $ 192 382 (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 December 31, 2018 and 2017 , includes $80.1 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 $17.3 billion and $19.0 billion , at December 31, 2018 and 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 December 31, 2018 and 2017 , we have received total collateral with a fair value of $123.1 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 $60.8 billion at December 31, 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 December 31, 2018 and 2017 , we have pledged total collateral with a fair value of $108.8 billion and $113.6 billion , respectively, of which, the counterparty does not have the right to sell or repledge $4.4 billion as of December 31, 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 15.4 provides the underlying collateral types of our gross obligations under repurchase and securities lending agreements. Table 15.4: Underlying Collateral Types of Gross Obligations Dec 31, Dec 31, (in millions) 2018 2017 Repurchase agreements: Securities of U.S. Treasury and federal agencies (1) $ 38,408 40,507 Securities of U.S. States and political subdivisions 159 92 Federal agency mortgage-backed securities (1) 47,241 45,336 Non-agency mortgage-backed securities 1,875 1,324 Corporate debt securities (1) 6,191 8,020 Asset-backed securities 2,074 2,034 Equity securities 992 838 Other (1) 340 1,602 Total repurchases 97,280 99,753 Securities lending: Securities of U.S. Treasury and federal agencies 222 186 Federal agency mortgage-backed securities 2 — Corporate debt securities 389 619 Equity securities (2) 8,349 10,930 Other 6 — Total securities lending 8,968 11,735 Total repurchases and securities lending $ 106,248 111,488 (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 15.5 provides the contractual maturities of our gross obligations under repurchase and securities lending agreements. Table 15.5: Contractual Maturities of Gross Obligations (in millions) Overnight/continuous Up to 30 days 30-90 days >90 days Total gross obligation December 31, 2018 Repurchase agreements $ 86,574 3,244 2,153 5,309 97,280 Securities lending 8,669 — 299 — 8,968 Total repurchases and securities lending (1) $ 95,243 3,244 2,452 5,309 106,248 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 December 31, 2018 and 2017 , we had commitments to purchase debt securities of $335 million and $194 million , respectively, and commitments to purchase equity securities of $2.5 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 $9.8 billion and $2.8 billion as of December 31, 2018 and 2017 , respectively. The Parent fully and unconditionally guarantees the payment of principal, interest, and any other amounts that may be due on securities that its 100% owned finance subsidiary, Wells Fargo Finance LLC, may issue. These guaranteed liabilities were $5 million and $0 million at December 31, 2018 and 2017 , respectively. These guarantees rank on parity with all of the Parent’s other unsecured and unsubordinated indebtedness.

Legal Actions

Legal Actions	12 Months Ended
	Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Legal Actions	Note 16: 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 Consumer Financial Protection Bureau (CFPB) 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 $1.0 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 customer and dealer and, by assignment, the lender, which will result in remediation 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 plaintiffs filed an amended complaint in November 2018. Subject to full documentation and court approval, the parties have reached agreements in principle to resolve the shareholder derivative lawsuits pursuant to which the Company will pay plaintiffs’ attorneys’ fees and undertake certain business and governance practices. 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. In December 2018, the Company entered into an agreement with all 50 state Attorneys General and the District of Columbia to resolve an investigation into the Company’s retail sales practices, CPI and GAP, and mortgage interest rate lock matters, pursuant to which the Company paid $575 million . CONSUMER DEPOSIT ACCOUNT RELATED REGULATORY INVESTIGATION The CFPB 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 (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 the Company’s recently implemented standards and pricing. 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 . The court granted preliminary approval of the settlement in January 2019, and scheduled a final approval hearing for November 7, 2019. 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 CFPB 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 $1.0 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. The Company filed a motion to dismiss this action. 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. In December 2018, the Company entered into an agreement with all 50 state Attorneys General and the District of Columbia to resolve an investigation into the Company’s retail sales practices, CPI and GAP, and mortgage interest rate lock matters, pursuant to which the Company paid $575 million . MORTGAGE LOAN MODIFICATION LITIGATION Plaintiffs representing a putative class of mortgage borrowers have filed separate putative class actions, Hernandez v. Wells Fargo, et al. , and Coordes v. Wells Fargo, et al. , against Wells Fargo Bank, N.A. in the United States District Court for the Northern District of California and the United States District Court for the District of Washington, respectively. Plaintiffs allege that Wells Fargo improperly denied mortgage loan modifications or repayment plans to customers in the foreclosure process due to the overstatement of foreclosure attorneys’ fees that were included for purposes of determining whether a customer in the foreclosure process qualified for a mortgage loan modification or repayment plan. MORTGAGE RELATED REGULATORY INVESTIGATIONS Federal and state government agencies, including the 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, or 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 in August 2018 to resolve the Department of Justice investigation, which related to certain 2005-2007 residential mortgage-backed securities activities. In addition, the Company reached an agreement with the Attorney General of the State of Illinois in November 2018 pursuant to which the Company paid $17 million in restitution to certain Illinois state pension funds to resolve a claim relating to certain residential mortgage-backed securities activities. 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. Plaintiffs petitioned for certiorari from the United States Supreme Court, and that petition was denied in January 2019. RETAIL SALES PRACTICES MATTERS Federal, state, and local government agencies, including the Department of Justice, the United States Securities and Exchange Commission (SEC), and the United States Department of Labor; 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 CFPB, 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. In October 2018, the Company entered into an agreement to resolve the New York Attorney General’s investigation pursuant to which the Company paid $65 million to the State of New York. In December 2018, the Company entered into an agreement with all 50 state Attorneys General and the District of Columbia to resolve an investigation into the Company’s retail sales practices, CPI and GAP, and mortgage interest rate lock matters, pursuant to which the Company paid $575 million . The Company has also engaged in preliminary and/or exploratory resolution discussions with the Department of Justice and the SEC, although there can be no assurance as to the outcome of these discussions. 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 brought 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 entered into a settlement agreement to resolve this matter pursuant to which the Company paid $480 million . The district court issued an order granting final approval of the settlement on December 20, 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. Subject to full documentation and court approval, the parties have reached an agreement in principle to resolve the shareholder derivative lawsuits pursuant to which insurance carriers will pay the Company approximately $240 million for alleged damage to the Company, and the Company will pay plaintiffs’ attorneys’ fees. 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 been dismissed and is now on appeal; 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 (which have been settled), 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 Action). A complaint raising similar allegations to those in 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). 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 November 2018, the Institutional Investor Plaintiffs and the Company entered into a settlement agreement pursuant to which, among other terms, the Company will pay $43 million to resolve the Federal Court Complaint and the State Court Action. The settlement will also resolve the Third Party Claims and the Declaratory Judgment Action. The New York state court has scheduled a fairness hearing on the settlement for May 6, 2019. In addition, Royal Park Investments SA/NV and Wells Fargo Bank, N.A. have reached an agreement resolving the Royal Park Action. Other than the Royal Park Action, the Related Federal Cases are not covered by these settlement agreements. 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. Trial is scheduled for October 2019. 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 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 $2.7 billion as of December 31, 2018 . The increase in the high end of the range from September 30, 2018, was due to a variety of matters, including the Company’s existing retail sales practices matters. 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	12 Months Ended
	Dec. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives	Note 17: 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. Our asset/liability management approach to interest rate, foreign currency and certain other risks includes the use of derivatives. Such derivatives are typically designated as fair value or cash flow hedges, or economic hedges. We use derivatives to help minimize significant, unplanned fluctuations in earnings, fair values of assets and liabilities, and cash flows caused by interest rate, foreign currency and other market risk volatility. This approach involves modifying the repricing characteristics of certain assets and liabilities so that changes in interest rates, foreign currency and other exposures, which may cause the hedged assets and liabilities to gain or lose fair value, do not have a significantly adverse effect on the net interest margin, cash flows and earnings. In a fair value or economic hedge, the effect of change in fair value will generally be offset by the unrealized gain or loss on the derivatives linked to the hedged assets and liabilities. In a cash flow hedge, where we manage the variability of cash payments due to interest rate fluctuations by the effective use of derivatives linked to hedged assets and liabilities, the hedged asset or liability is not adjusted and the unrealized gain or loss on the derivative is recorded in other comprehensive income. We also offer various derivatives, including interest rate, commodity, equity, credit and foreign exchange contracts, as an accommodation to our customers as part of our trading businesses. These derivative transactions, which involve our engaging in market-making activities or acting as an intermediary, are conducted in an effort to help customers manage their market risks. We usually offset our exposure from such derivatives by entering into other financial contracts, such as separate derivative or security transactions. These customer accommodations and any offsetting derivatives are treated as customer accommodation trading and other derivatives in our disclosures. Additionally, embedded derivatives that are required to be accounted for separately from their host contracts are included in the customer accommodation trading and other derivatives disclosures as applicable. Table 17.1 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 17.1: Notional or Contractual Amounts and Fair Values of Derivatives December 31, 2018 December 31, 2017 Notional or Fair value Notional or Fair value contractual Asset Liability contractual Asset Liability (in millions) amount derivatives derivatives amount derivatives derivatives Derivatives designated as hedging instruments Interest rate contracts (1) $ 177,511 2,237 636 209,677 2,492 1,092 Foreign exchange contracts (1) 34,176 573 1,376 34,135 1,482 1,137 Total derivatives designated as qualifying hedging instruments 2,810 2,012 3,974 2,229 Derivatives not designated as hedging instruments Economic hedges: Interest rate contracts (2) 173,215 849 369 220,558 159 201 Equity contracts 13,920 1,362 79 12,315 716 138 Foreign exchange contracts 19,521 225 80 15,976 78 309 Credit contracts - protection purchased 100 27 — 111 37 — Subtotal 2,463 528 990 648 Customer accommodation trading and other derivatives: Interest rate contracts 9,162,821 15,349 15,303 6,434,673 14,979 14,179 Commodity contracts 66,173 1,588 2,336 62,530 2,354 1,335 Equity contracts 217,890 6,183 5,931 213,750 6,291 8,363 Foreign exchange contracts 364,982 5,916 5,657 362,896 7,413 7,122 Credit contracts - protection sold 11,741 76 182 9,021 147 214 Credit contracts - protection purchased 20,880 175 98 17,406 207 208 Subtotal 29,287 29,507 31,391 31,421 Total derivatives not designated as hedging instruments 31,750 30,035 32,381 32,069 Total derivatives before netting 34,560 32,047 36,355 34,298 Netting (3) (23,790 ) (23,548 ) (24,127 ) (25,502 ) Total $ 10,770 8,499 12,228 8,796 (1) Notional amounts presented at December 31, 2017, exclude $500 million of interest rate contracts for certain derivatives that are combined for designation as a hedge in a single relationship. No such hedging relationships existed at December 31, 2018. The notional amount for foreign exchange contracts at December 31, 2018 and 2017 , excludes $11.2 billion and $13.5 billion , respectively for certain derivatives that are combined for designation as a hedge on a single relationship. (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 the next table in this Note for further information. Table 17.2 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 $30.9 billion and $28.4 billion of gross derivative assets and liabilities, respectively, at December 31, 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 $3.7 billion and $3.6 billion , respectively, at December 31, 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 17.2 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 15 (Guarantees, Pledged Assets and Collateral, and Other Commitments). Table 17.2: 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) December 31, 2018 Derivative assets Interest rate contracts $ 18,435 (12,029 ) 6,406 (80 ) 6,326 90 % Commodity contracts 1,588 (849 ) 739 (4 ) 735 57 Equity contracts 7,545 (5,318 ) 2,227 (755 ) 1,472 78 Foreign exchange contracts 6,714 (5,355 ) 1,359 (35 ) 1,324 100 Credit contracts-protection sold 76 (73 ) 3 — 3 12 Credit contracts-protection purchased 202 (166 ) 36 (1 ) 35 78 Total derivative assets $ 34,560 (23,790 ) 10,770 (875 ) 9,895 Derivative liabilities Interest rate contracts $ 16,308 (13,152 ) 3,156 (567 ) 2,589 92 % Commodity contracts 2,336 (727 ) 1,609 (8 ) 1,601 85 Equity contracts 6,010 (3,877 ) 2,133 (110 ) 2,023 75 Foreign exchange contracts 7,113 (5,522 ) 1,591 (188 ) 1,403 100 Credit contracts-protection sold 182 (180 ) 2 (2 ) — 67 Credit contracts-protection purchased 98 (90 ) 8 — 8 11 Total derivative liabilities $ 32,047 (23,548 ) 8,499 (875 ) 7,624 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 $353 million and $245 million related to derivative assets and $152 million and $95 million related to derivative liabilities as of December 31, 2018 and 2017 , respectively. Cash collateral totaled $3.7 billion and $3.6 billion , netted against derivative assets and liabilities, respectively, at December 31, 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 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 $293 million pre-tax of deferred net losses primarily related to cash flow hedges in OCI at December 31, 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. Table 17.3 shows the net gains (losses) related to derivatives in fair value and cash flow hedging relationships. Table 17.3: Gains (Losses) Recognized in Consolidated Statement of Income on Fair Value and Cash Flow Hedging Relationships (1) Net interest income Noninterest Income (in millions) Debt securities Loans Mortgage loans held for sale Deposits Long-term debt Other Total Year ended December 31, 2018 Total amounts presented in the consolidated statement of income $ 14,406 43,974 777 (5,622 ) (6,703 ) 2,473 49,305 Gains (losses) on fair value hedging relationships Interest rate contracts Amounts related to interest settlements on derivatives (2) (187 ) — (3 ) (41 ) 292 — 61 Recognized on derivatives 845 1 15 27 (1,923 ) — (1,035 ) Recognized on hedged items (877 ) (1 ) (22 ) (33 ) 1,843 — 910 Foreign exchange contracts Amounts related to interest settlements on derivatives (2)(3) 33 — — — (434 ) — (401 ) Recognized on derivatives (4) 7 — — — 135 (1,204 ) (1,062 ) Recognized on hedged items (1 ) — — — (82 ) 1,114 1,031 Net income (expense) recognized on fair value hedges (180 ) — (10 ) (47 ) (169 ) (90 ) (496 ) Gains (losses) on cash flow hedging relationships Interest contracts Realized gains (losses) (pre tax) reclassified from cumulative OCI into net income (5) — (292 ) — — 1 — (291 ) Foreign exchange contracts Realized gains (losses) (pre-tax) reclassified from cumulative OCI into net income (5) — — — — (3 ) — (3 ) Net income (expense) recognized on cash flow hedges $ — (292 ) — — (2 ) — (294 ) (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 Year ended December 31, 2017 Total amounts presented in the consolidated statement of income $ 12,946 41,388 786 (3,013 ) (5,157 ) 1,603 48,553 Gains (losses) on fair value hedging relationships Interest rate contracts Amounts related to interest settlements on derivatives (2) (469 ) (1 ) (5 ) 36 1,286 — 847 Recognized on derivatives (43 ) 1 (5 ) (20 ) (912 ) — (979 ) Recognized on hedged items (52 ) (1 ) (4 ) 36 938 — 917 Foreign exchange contracts Amounts related to interest settlements on derivatives (2)(3) 14 — — — (210 ) — (196 ) Recognized on derivatives (4) 13 — — — (230 ) 3,118 2,901 Recognized on hedged items (10 ) — — — 255 (2,855 ) (2,610 ) Net income (expense) recognized on fair value hedges (547 ) (1 ) (14 ) 52 1,127 263 880 Gains (losses) on cash flow hedging relationships Interest contracts Realized gains (losses) (pre tax) reclassified from cumulative OCI into net income (5) — 551 — — (8 ) — 543 Foreign exchange contracts Realized gains (losses) (pre-tax) reclassified from cumulative OCI into net income (5) — — — — — — — Net income (expense) recognized on cash flow hedges $ — 551 — — (8 ) — 543 Year ended December 31, 2016 Total amounts presented in the consolidated statement of income $ 11,244 39,505 784 (1,395 ) (3,830 ) 1,289 47,597 Gains (losses) on fair value hedging relationships Interest rate contracts Amounts related to interest settlements on derivatives (2) (582 ) — (6 ) 62 1,830 — 1,304 Recognized on derivatives — — — — — (2,175 ) (2,175 ) Recognized on hedged items — — — — — 2,157 2,157 Foreign exchange contracts Amounts related to interest settlements on derivatives (2)(3) 9 — — — 31 — 40 Recognized on derivatives — — — — — (274 ) (274 ) Recognized on hedged items — — — — — 286 286 Net income (expense) recognized on fair value hedges (573 ) — (6 ) 62 1,861 (6 ) 1,338 Gains (losses) on cash flow hedging relationships Interest contracts Realized gains (losses) (pre tax) reclassified from cumulative OCI into net income (5) — 1,043 — — (14 ) — 1,029 Gains (losses) (before tax) recognized in income for hedge ineffectiveness — — — — — (1 ) (1 ) Foreign exchange contracts Realized gains (losses) (pre-tax) reclassified from cumulative OCI into net income (5) — — — — — — — Net income (expense) recognized on cash flow hedges $ — 1,043 — — (14 ) (1 ) 1,028 (1) Year ended December 31, 2016, gain or loss amounts and presentation location were not conformed to new hedge accounting guidance that we adopted in 2017. (2) Includes changes in fair value due to the passage of time associated with the non-zero fair value amount at hedge inception . (3) Includes $(2) million , $(3) million and $(13) million for years ended December 31, 2018 , 2017 , and 2016 , respectively, of the time value component recognized as net interest income (expense) on forward derivatives hedging foreign currency available-for-sale securities and long-term debt that were excluded from the assessment of hedge effectiveness. (4) 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 25 (Other Comprehensive Income) for the amounts recognized in other comprehensive income. (5) See Note 25 (Other Comprehensive Income) for details of amounts reclassified to net income. Table 17.4 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 17.4: 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 December 31, 2018 Available-for-sale debt securities (5) $ 37,857 (157 ) 4,938 238 Loans — — — — Mortgage loans held for sale 448 7 — — Deposits (56,535 ) 115 — — Long-term debt (104,341 ) (742 ) (25,539 ) 366 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 $1.6 billion and for long-term debt is $(6.3) billion as of December 31, 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 $1.4 billion and $66 million of debt securities and long-term debt cumulative basis adjustments as of December 31, 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 securities and other noninterest income. The derivatives used to hedge MSRs measured at fair value, which include swaps, swaptions, constant maturity mortgages, forwards, Eurodollar and Treasury futures and options contracts, resulted in net derivative gains (losses) of $(1.1) billion , $413 million , and $261 million in 2018, 2017, and 2016 , respectively, which are included in mortgage banking noninterest income. The aggregate fair value of these derivatives was a net asset of $757 million at December 31, 2018 , and a 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. Our interest rate exposure on these derivative loan commitments, as well as residential MLHFS, is hedged with economic hedge derivatives such as swaps, forwards and options, Eurodollar futures and options, and Treasury futures, forwards and options contracts. The derivative loan commitments, economic hedge derivatives and residential MLHFS are carried at fair value with changes in fair value included in mortgage banking noninterest income. For the fair value measurement of derivative loan commitments we include, at inception and during the life of the loan commitment, the expected net future cash flows related to the associated servicing of the loan. Fair value changes subsequent to inception are based on changes in fair value of the underlying loan resulting from the exercise of the commitment and changes in the probability that the loan will not fund within the terms of the commitment (referred to as a fall-out factor). The value of the underlying loan is affected by changes in interest rates and the passage of time. However, changes in investor demand can also cause changes in the value of the underlying loan value that cannot be hedged. The aggregate fair value of derivative loan commitments on the balance sheet was a net positive fair value of $60 million and $17 million at December 31, 2018 and 2017 , respectively, and is included in the caption “Interest rate contracts” under “Customer accommodation trading and other derivatives” in Table 17.1. We also enter into various derivatives as an accommodation to our customers as part of our trading businesses. These derivatives are not linked to specific assets and liabilities on the balance sheet or to forecasted transactions in an accounting hedge relationship and, therefore, do not qualify for hedge accounting. We also enter into derivatives for risk management that do not otherwise qualify for hedge accounting. They are carried at fair value with changes in fair value recorded in noninterest income. Customer accommodation trading and other derivatives also include embedded derivatives that are required to be accounted for separately from their host contract. We periodically issue hybrid long-term notes and CDs where the performance of the hybrid instrument notes is linked to an equity, commodity or currency index, or basket of such indices. These notes contain explicit terms that affect some or all of the cash flows or the value of the note in a manner similar to a derivative instrument and therefore are considered to contain an “embedded” derivative instrument. The indices on which the performance of the hybrid instrument is calculated are not clearly and closely related to the host debt instrument. The “embedded” derivative is separated from the host contract and accounted for as a derivative. Additionally, we may invest in hybrid instruments that contain embedded derivatives, such as credit derivatives, that are not clearly and closely related to the host contract. In such instances, we either elect fair value option for the hybrid instrument or separate the embedded derivative from the host contract and account for the host contract and derivative separately. Table 17.5 shows the net gains (losses), recognized by income statement lines, related to derivatives not designated as hedging instruments. Table 17.5: 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 Year ended December 31, 2018 Net gains (losses) recognized on economic hedges derivatives: Interest rate contracts (1) $ (215 ) — — (15 ) (230 ) Equity contracts — (408 ) — 4 (404 ) Foreign exchange contracts — — — 669 669 Credit contracts — — — — — Subtotal (2) (215 ) (408 ) — 658 35 Net gains (losses) recognized on customer accommodation trading and other derivatives: Interest rate contracts (3) (352 ) — 446 — 94 Equity contracts — — 4,499 (403 ) 4,096 Foreign exchange contracts — — 638 — 638 Credit contracts — — 1 — 1 Commodity contracts — — 83 — 83 Other — — — — — Subtotal (352 ) — 5,667 (403 ) 4,912 Net gains (losses) recognized related to derivatives not designated as hedging instruments $ (567 ) (408 ) 5,667 255 4,947 (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 Year ended December 31, 2017 Net gains (losses) recognized on economic hedges derivatives: Interest rate contracts (1) $ 448 — — (75 ) 373 Equity contracts — (1,483 ) — 17 (1,466 ) Foreign exchange contracts — — — (866 ) (866 ) Credit contracts — — — 5 5 Subtotal (2) 448 (1,483 ) — (919 ) (1,954 ) Net gains (losses) recognized on customer accommodation trading and other derivatives: Interest rate contracts (3) 614 — 160 — 774 Equity contracts — — (3,932 ) 1 (3,931 ) Foreign exchange contracts — — 638 — 638 Credit contracts — — (81 ) — (81 ) Commodity contracts — — 178 — 178 Other — — — — — Subtotal 614 — (3,037 ) 1 (2,422 ) Net gains (losses) recognized related to derivatives not designated as hedging instruments $ 1,062 (1,483 ) (3,037 ) (918 ) (4,376 ) Year ended December 31, 2016 Net gains (losses) recognized on economic hedges derivatives: Interest rate contracts (1) $ 1,029 — — (51 ) 978 Equity contracts — 125 — (11 ) 114 Foreign exchange contracts — — — 954 954 Credit contracts — — — 21 21 Subtotal (2) 1,029 125 — 913 2,067 Net gains (losses) recognized on customer accommodation trading and other derivatives: Interest contracts (3) 818 — 255 — 1,073 Equity contracts — — (1,643 ) — (1,643 ) Foreign exchange contracts — — 1,077 — 1,077 Credit contracts — — (105 ) — (105 ) Commodity contracts — — 216 — 216 Other — — 11 — 11 Subtotal 818 — (189 ) — 629 Net gains (losses) recognized related to derivatives not designated as hedging instruments $ 1,847 125 (189 ) 913 2,696 (1) Includes gains (losses) on the derivatives used as economic hedges of MSRs measured at fair value, derivative loan commitments and mortgages held for sale. (2) Includes hedging gains (losses) of $9 million , $(71) million , and $(8) million for the years ended December 31, 2018 , 2017 , and 2016 , respectively, which partially offset hedge accounting ineffectiveness. (3) Amounts presented in mortgage banking noninterest income are gains (losses) 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 the 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 17.6 provides details of sold and purchased credit derivatives. Table 17.6: 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 December 31, 2018 Credit default swaps on: Corporate bonds $ 59 2,037 441 1,374 663 1,460 2019 - 2027 Structured products 62 133 128 121 12 113 2022 - 2047 Credit protection on: Default swap index 1 3,618 582 1,998 1,620 2,896 2019 - 2028 Commercial mortgage-backed securities index 49 389 109 363 26 51 2047 - 2058 Asset-backed securities index 9 42 42 42 — 1 2045 - 2046 Other 2 5,522 5,327 — 5,522 12,561 2018 - 2048 Total credit derivatives $ 182 11,741 6,629 3,898 7,843 17,082 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 ci

Fair Values of Assets and Liabi

Fair Values of Assets and Liabilities	12 Months Ended
	Dec. 31, 2018
Fair Value Disclosures [Abstract]
Fair Values of Assets and Liabilities	Note 18: 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 18.2 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, write-downs of individual assets or application of the measurement alternative for nonmarketable equity securities. Assets recorded on a nonrecurring basis are presented in Table 18.12 in this Note. Following is a discussion of the fair value hierarchy and 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. 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 equity securities 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 are classified in the fair value hierarchy. In the determination of the classification of financial instruments in Level 2 or Level 3 of the fair value hierarchy, we consider all available information, including observable market data, indications of market liquidity and orderliness, and our understanding of the valuation techniques and significant inputs used. For securities in inactive markets, we use a predetermined percentage to evaluate the impact of fair value adjustments derived from weighting both external and internal indications of value to determine if the instrument is classified as Level 2 or Level 3. Otherwise, the classification of Level 2 or Level 3 is based upon the specific facts and circumstances of each instrument or instrument category and judgments are made regarding the significance of the Level 3 inputs to the instruments’ fair value measurement in its entirety. If Level 3 inputs are considered significant, the instrument is classified as Level 3. Assets SHORT-TERM FINANCIAL ASSETS Short-term financial assets include cash and due from banks, interest-earning deposits with banks, federal funds sold and securities purchased under resale agreements and due from customers on acceptances (classified in Other Assets). These assets are carried at historical cost. The carrying amount is a reasonable estimate of fair value because of the relatively short time between the origination of the instrument and its expected realization. TRADING DEBT SECURITIES Trading debt securities are recorded at fair value on a recurring basis. These securities are valued using internal trader prices that are subject to price verification procedures. The fair values derived using internal valuation techniques are verified against multiple pricing sources, including prices obtained from third- party vendors. Vendors compile prices from various sources and often apply matrix pricing for similar securities when no price is observable. We review pricing methodologies provided by the vendors in order to determine if observable market information is being used versus unobservable inputs. When evaluating the appropriateness of an internal trader price compared with vendor prices, considerations include the range and quality of vendor prices. Vendor prices are used to ensure the reasonableness of a trader price; however, valuing financial instruments involves judgments acquired from knowledge of a particular market. If a trader asserts that a vendor price is not reflective of market value, justification for using the trader price, including recent sales activity where possible, must be provided to and approved by the appropriate levels of management. AVAILABLE-FOR-SALE AND HELD-TO-MATURITY DEBT SECURITIES Available-for-sale (AFS) debt securities are recorded at fair value on a recurring basis and held-to-maturity (HTM) debt securities are recorded at amortized cost. HTM debt securities are subject to impairment and fair value measurement is recorded if the fair value declines below amortized cost and we do not expect to recover the entire amortized cost basis of the security. Fair value measurement for AFS and HTM debt securities is based upon various sources of market pricing. We use quoted prices in active markets, where available, and classify such instruments within Level 1 of the fair value hierarchy. For example, highly liquid government securities, such as U.S. Treasuries, are classified as Level 1. When instruments are traded in secondary markets and quoted market prices do not exist for such securities, we generally rely on internal valuation techniques or on prices obtained from vendors ( predominantly third-party pricing services), and accordingly, we classify these instruments as Level 2 or 3. AFS debt securities traded in secondary markets are typically valued using unadjusted vendor prices or vendor prices adjusted by weighting them with internal discounted cash flow techniques, these prices are reviewed and, if deemed inappropriate by a trader who has the most knowledge of a particular market, can be adjusted. These securities, which include those measured using unadjusted vendor prices, are generally classified as Level 2 and typically involve using quoted market prices for the same or similar securities, pricing models, discounted cash flow analyses using significant inputs observable in the market where available or a combination of multiple valuation techniques. Examples include certain residential and commercial MBS, other asset-backed securities municipal bonds, U.S. government and agency MBS, and corporate debt securities. Debt security fair value measurements using significant inputs that are unobservable in the market due to limited activity or a less liquid market are classified as Level 3 in the fair value hierarchy. Such measurements include securities valued using internal models or a combination of multiple valuation techniques where the unobservable inputs are significant to the overall fair value measurement. Securities classified as Level 3 include certain residential and commercial MBS, other asset-backed securities, CDOs and certain CLOs, and certain residual and retained interests in residential mortgage loan securitizations. We value CDOs using the prices of similar instruments, the pricing of completed or pending third-party transactions or the pricing of the underlying collateral within the CDO. Where vendor prices are not readily available, we use management’s best estimate. MORTGAGE LOANS HELD FOR SALE (MLHFS) MLHFS are carried at LOCOM or at fair value. We carry substantially all of our residential MLHFS portfolio at fair value. Fair value is based on quoted market prices, where available, or the prices for other mortgage whole loans with similar characteristics. As necessary, these prices are adjusted for typical securitization activities, including servicing value, portfolio composition, market conditions and liquidity. Predominantly all of our MLHFS are classified as Level 2. For the portion where market pricing data is not available, we use a discounted cash flow model to estimate fair value and, accordingly, classify as Level 3. LOANS HELD FOR SALE (LHFS) LHFS are carried at LOCOM or at fair value. Loans used in our trading business are recorded at fair value on a recurring basis, and the fair value is based on current offerings in secondary markets for loans with similar characteristics. Loans that are subject to nonrecurring fair value adjustments are classified as Level 2. LOANS For information on how we report the carrying value of loans, see Note 1 (Summary of Significant Accounting Policies). Although most loans are not recorded at fair value on a recurring basis, reverse mortgages are recorded at fair value on a recurring basis. In addition, we record nonrecurring fair value adjustments to loans to reflect partial write-downs that are based on the observable market price of the loan or current appraised value of the collateral. We provide fair value estimates that are based on an exit price notion in this disclosure for loans that are not recorded at fair value on a recurring or nonrecurring basis. The fair value estimates of these loans are differentiated by their financial characteristics, such as product classification, loan category, pricing features and remaining maturity. Prepayment and credit loss estimates are evaluated and used in the valuation process. DERIVATIVES All derivatives are recorded at fair value on a recurring basis. Derivative valuation includes the use of available market prices for our exchange-traded derivatives, such as certain interest rate futures and option contracts, which we classify as Level 1. However, substantially all of our derivatives are traded in over-the-counter (OTC) markets where quoted market prices are not always readily available. Therefore we value most OTC derivatives using internal valuation techniques. Valuation techniques and inputs to internally-developed models depend on the type of derivative and nature of the underlying rate, price or index upon which the derivative’s value is based. Key inputs can include yield curves, credit curves, foreign exchange rates, prepayment rates, volatility measurements and correlation of such inputs. Where model inputs can be observed in a liquid market and the model does not require significant judgment, such derivatives are typically classified as Level 2 of the fair value hierarchy. Examples of derivatives classified as Level 2 include generic interest rate swaps, foreign currency swaps, commodity swaps, and certain option and forward contracts. When instruments are traded in less liquid markets and significant inputs are unobservable, such derivatives are classified as Level 3. Examples of derivatives classified as Level 3 include complex and highly structured derivatives, certain credit default swaps, derivative loan commitments written for our mortgage loans that we intend to sell and long-dated equity options where volatility is not observable. Additionally, significant judgments are required when classifying financial instruments within the fair value hierarchy, particularly between Level 2 and 3, as is the case for certain derivatives. MORTGAGE SERVICING RIGHTS (MSRs) AND CERTAIN OTHER INTERESTS HELD IN SECURITIZATIONS MSRs and certain other interests held in securitizations (e.g., interest-only strips) do not trade in an active market with readily observable prices. Accordingly, we determine the fair value of MSRs using a valuation model that calculates the present value of estimated future net servicing income cash flows. The model incorporates assumptions that market participants use in estimating future net servicing income cash flows, including estimates of prepayment speeds (including housing price volatility), discount rates, default rates, cost to service (including delinquency and foreclosure costs), escrow account earnings, contractual servicing fee income, ancillary income and late fees. Commercial MSRs are carried at LOCOM and, therefore, can be subject to fair value measurements on a nonrecurring basis. Changes in the fair value of MSRs occur primarily due to the collection/realization of expected cash flows as well as changes in valuation inputs and assumptions. For other interests held in securitizations (such as interest-only strips), we use a valuation model that calculates the present value of estimated future cash flows. The model incorporates our own estimates of assumptions market participants use in determining the fair value, including estimates of prepayment speeds, discount rates, defaults and contractual fee income. Interest-only strips are recorded as trading assets. Our valuation approach is validated by our internal valuation model validation group. Fair value measurements of our MSRs and interest-only strips use significant unobservable inputs and, accordingly, we classify them as Level 3. EQUITY SECURITIES Marketable equity securities and certain nonmarketable equity securities for which we have elected to account for under the fair value method are recorded at fair value on a recurring basis. Our remaining nonmarketable equity securities are accounted for using the equity method, cost method or measurement alternative. These securities can be subject to nonrecurring fair value adjustments to record impairment write-downs or, for equity securities accounted for under the measurement alternative, adjustments to the carrying value due to the occurrence of observable transactions. We use quoted prices to determine the fair value of marketable equity securities as the securities are publicly traded. Quoted prices are typically not available for nonmarketable equity securities. We therefore use other methods, such as market comparable pricing or discounted cash flow valuation techniques, to determine fair value for such securities. We use all available information in making this determination, which includes observable transaction prices for the same or similar security, vendor prices, broker quotes, trading multiples of comparable public companies and discounted cash flow models. Where appropriate we make adjustments to observed market data to reflect the comparative differences between the market data and the attributes of our equity security, such as differences with public companies and other investment-specific considerations like liquidity, marketability or differences in terms of the instruments. Substantially all of our nonmarketable equity securities accounted for under the cost method include Federal Reserve Bank stock and Federal Home Loan Bank stock, of which their carrying value approximate their fair value. FORECLOSED ASSETS Foreclosed assets are carried at net realizable value, which represents fair value less costs to sell. Fair value is generally based upon independent market prices or appraised values of the collateral and, accordingly, we classify foreclosed assets as Level 2. Liabilities DEPOSIT AND SHORT-TERM FINANCIAL LIABILITIES Deposit and short-term financial liabilities are recorded at historical cost. For this disclosure, we estimate the fair value of deposit liabilities with a contractual or defined maturity and short-term financial liabilities, which include federal funds purchased, securities sold under repurchase agreements, commercial paper and other short-term borrowings. The carrying value of our short-term financial liabilities is a reasonable estimate of their fair value because of the relatively short time between their origination and expected realization. OTHER LIABILITIES Other liabilities recorded at fair value on a recurring basis predominantly include short sale liabilities. Short sale liabilities are predominantly classified as either Level 1 or Level 2, generally depending upon whether the underlying securities have readily available quoted prices in active markets. LONG-TERM DEBT Long-term debt is recorded at amortized cost. For this disclosure, we estimate the fair value of our long-term debt, which is largely denominated in U.S. dollars that are issued with a fixed or floating rate at varying levels of seniority and maturity. Level 3 Asset and Liability Valuation Processes We generally determine fair value of our Level 3 assets and liabilities by using internally-developed models and, to a lesser extent, prices obtained from vendors, which predominantly consist of third-party pricing services. Our valuation processes vary depending on which approach is utilized. INTERNAL MODEL VALUATIONS Our internally-developed models largely use discounted cash flow techniques. Use of such techniques requires determining relevant inputs, some of which are unobservable. Unobservable inputs are generally derived from historic performance of similar assets or determined from previous market trades in similar instruments. These unobservable inputs usually consist of discount rates, default rates, loss severity upon default, volatilities, correlations and prepayment rates, which are inherent within our Level 3 instruments. Such inputs can be correlated to similar portfolios with known historic experience or recent trades where particular unobservable inputs may be implied, but due to the nature of various inputs being reflected within a particular trade, the value of each input is considered unobservable. We attempt to correlate each unobservable input to historic experience and other third-party data where available. Internal valuation models are subject to review prescribed within our model risk management policies and procedures, which include model validation. The purpose of model validation includes ensuring the model is appropriate for its intended use and the appropriate controls exist to help mitigate risk of invalid valuations. Model validation assesses the adequacy and appropriateness of the model, including reviewing its key components, such as inputs, processing components, logic or theory, output results and supporting model documentation. Validation also includes ensuring significant unobservable model inputs are appropriate given observable market transactions or other market data within the same or similar asset classes. This process ensures modeled approaches are appropriate given similar product valuation techniques and are in line with their intended purpose. We have ongoing monitoring procedures in place for our Level 3 assets and liabilities that use such internal valuation models. These procedures, which are designed to provide reasonable assurance that models continue to perform as expected after approved, include: • ongoing analysis and benchmarking to market transactions and other independent market data (including pricing vendors, if available); • back-testing of modeled fair values to actual realized transactions; and • review of modeled valuation results against expectations, including review of significant or unusual value fluctuations. We update model inputs and methodologies periodically to reflect these monitoring procedures. Additionally, procedures and controls are in place to ensure existing models are subject to periodic reviews, and we perform full model revalidations as necessary. All internal valuation models are subject to ongoing review by business-unit-level management, and all models are subject to additional oversight by a corporate-level risk management department. Corporate oversight responsibilities include evaluating the adequacy of business unit risk management programs, maintaining company-wide model validation policies and standards and reporting the results of these activities to management and our Corporate Model Risk Committee. This committee consists of senior executive management and reports on top model risk issues to the Company’s Risk Committee of the Board. VENDOR-DEVELOPED VALUATIONS In certain limited circumstances, we obtain pricing from third-party vendors for the value of our Level 3 assets or liabilities. We have processes in place to approve such vendors to ensure information obtained and valuation techniques used are appropriate. Once these vendors are approved to provide pricing information, we monitor and review the results to ensure the fair values are reasonable and in line with market experience in similar asset classes. While the input amounts used by the pricing vendor in determining fair value are not provided, and therefore unavailable for our review, we do perform one or more of the following procedures to validate the prices received: • comparison to other pricing vendors (if available); • variance analysis of prices; • corroboration of pricing by reference to other independent market data, such as market transactions and relevant benchmark indices; • review of pricing by Company personnel familiar with market liquidity and other market-related conditions; and • investigation of prices on a specific instrument-by-instrument basis. 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 instruments where we utilize vendor prices to record the price of an instrument, we perform additional procedures (see the “Vendor-Developed Valuations” section). Methodologies employed, controls relied upon and inputs used by third-party pricing vendors are subject to additional review when such services are provided. This review may consist of, in part, obtaining and evaluating control reports issued and pricing methodology materials distributed. Table 18.1 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 18.1 . Table 18.1: 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 December 31, 2018 Trading debt securities $ — — — 899 256 — Available-for-sale debt securities: Securities of U.S. Treasury and federal agencies — — — 10,399 2,949 — Securities of U.S. states and political subdivisions — — — — 48,377 43 Mortgage-backed securities — — — — 160,162 41 Other debt securities (1) — 45 129 — 44,292 758 Total available-for-sale debt securities — 45 129 10,399 255,780 842 Equity securities: Marketable — — — — 158 — Nonmarketable — — — — 1 — Total equity securities — — — — 159 — Derivative assets — — — 17 — — Derivative liabilities — — — (12 ) — — 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 18.2 presents the balances of assets and liabilities recorded at fair value on a recurring basis. Table 18.2: Fair Value on a Recurring Basis (in millions) Level 1 Level 2 Level 3 Netting Total December 31, 2018 Trading debt securities: Securities of U.S. Treasury and federal agencies $ 20,525 2,892 — — 23,417 Securities of U.S. states and political subdivisions — 3,272 3 — 3,275 Collateralized loan obligations — 673 237 — 910 Corporate debt securities — 10,723 34 — 10,757 Mortgage-backed securities — 30,715 — — 30,715 Asset-backed securities — 893 — — 893 Other trading debt securities — 6 16 — 22 Total trading debt securities 20,525 49,174 290 — 69,989 Available-for-sale debt securities: Securities of U.S. Treasury and federal agencies 10,399 2,949 — — 13,348 Securities of U.S. states and political subdivisions — 48,820 444 — 49,264 Mortgage-backed securities: Federal agencies — 153,203 — — 153,203 Residential — 2,775 — — 2,775 Commercial — 4,184 41 — 4,225 Total mortgage-backed securities — 160,162 41 — 160,203 Corporate debt securities 34 5,867 370 — 6,271 Collateralized loan and other debt obligations (1) — 34,543 800 — 35,343 Asset-backed securities: Automobile loans and leases — 925 — — 925 Home equity loans — 112 — — 112 Other asset-backed securities — 4,056 389 — 4,445 Total asset-backed securities — 5,093 389 — 5,482 Other debt securities — 1 — — 1 Total available-for-sale debt securities 10,433 257,435 2,044 (2) — 269,912 Mortgage loans held for sale — 10,774 997 — 11,771 Loans held for sale — 1,409 60 — 1,469 Loans — — 244 — 244 Mortgage servicing rights (residential) — — 14,649 — 14,649 Derivative assets: Interest rate contracts 46 18,294 95 — 18,435 Commodity contracts — 1,535 53 — 1,588 Equity contracts 1,648 4,582 1,315 — 7,545 Foreign exchange contracts 17 6,689 8 — 6,714 Credit contracts — 179 99 — 278 Netting — — — (23,790 ) (3) (23,790 ) Total derivative assets 1,711 31,279 1,570 (23,790 ) 10,770 Equity securities - excluding securities at NAV: Marketable 23,205 757 — — 23,962 Nonmarketable — 24 5,468 — 5,492 Total equity securities 23,205 781 5,468 — 29,454 Total assets included in the fair value hierarchy $ 55,874 350,852 25,322 (23,790 ) 408,258 Equity securities at NAV (4) 102 Total assets recorded at fair value 408,360 Derivative liabilities: Interest rate contracts $ (21 ) (16,217 ) (70 ) — (16,308 ) Commodity contracts — (2,287 ) (49 ) — (2,336 ) Equity contracts (1,492 ) (3,186 ) (1,332 ) — (6,010 ) Foreign exchange contracts (12 ) (7,067 ) (34 ) — (7,113 ) Credit contracts — (216 ) (64 ) — (280 ) Netting — — — 23,548 (3) 23,548 Total derivative liabilities (1,525 ) (28,973 ) (1,549 ) 23,548 (8,499 ) Short sale liabilities: Securities of U.S. Treasury and federal agencies (11,850 ) (411 ) — — (12,261 ) Mortgage-backed securities — (47 ) — (47 ) Corporate debt securities — (4,505 ) — — (4,505 ) Equity securities (2,902 ) (2 ) — — (2,904 ) Other securities — (3 ) — — (3 ) Total short sale liabilities (14,752 ) (4,968 ) — — (19,720 ) Other liabilities — — (2 ) — (2 ) Total liabilities recorded at fair value $ (16,277 ) (33,941 ) (1,551 ) 23,548 (28,221 ) (1) Includes collateralized debt obligations of $800 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 17 (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 ) Mortgage-backed securities — — — — — 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 17 (Derivatives) for additional information. (4) Consists of certain nonmarketable equity investments 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 year ended December 31, 2018 , are presented in Table 18.3 . Table 18.3: Changes in Level 3 Fair Value Assets and Liabilities on a Recurring Basis – 2018 Total net gains (losses) included in Purchases, sale

Preferred Stock

Preferred Stock	12 Months Ended
	Dec. 31, 2018
Preferred Stock [Abstract]
Preferred Stock	Note 19: 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 19.1: Preferred Stock Shares December 31, 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) — 1,406,460 — 1,556,104 Total 9,586,770 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 19.2: Preferred Stock – Shares Issued and Carrying Value December 31, 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 1,406,460 1,407 1,407 — 1,556,104 1,556 1,556 — Total 9,377,216 $ 24,458 23,214 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 19.3: ESOP Preferred Stock Shares issued and outstanding Carrying value Adjustable dividend rate Dec 31, Dec 31, Dec 31, Dec 31, (in millions, except shares) 2018 2017 2018 2017 Minimum Maximum ESOP Preferred Stock $1,000 liquidation preference per share 2018 336,945 — $ 337 — 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) 1,406,460 1,556,104 $ 1,407 1,556 Unearned ESOP shares (2) $ (1,502 ) (1,678 ) (1) At December 31, 2018 and 2017 , additional paid-in capital included $95 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.

Common Stock and Stock Plans

Common Stock and Stock Plans	12 Months Ended
	Dec. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Common Stock and Stock Plans	Note 20: Common Stock and Stock Plans Common Stock Table 20.1 presents our reserved, issued and authorized shares of common stock at December 31, 2018 . Table 20.1: Common Stock Shares Number of shares Dividend reinvestment and common stock purchase plans 9,114,931 Director plans 447,526 Stock plans (1) 369,893,237 Convertible securities and warrants 65,835,468 Total shares reserved 445,291,162 Shares issued 5,481,811,474 Shares not reserved or issued 3,072,897,364 Total shares authorized 9,000,000,000 (1) Includes employee options, restricted shares and restricted share rights, 401(k) profit sharing and compensation deferral plans. In connection with our participation in the Capital Purchase Program (CPP), a part of the Troubled Asset Relief Program (TARP), we issued to the U.S. Treasury Department warrants to purchase 110,261,688 shares of our common stock with an original exercise price of $34.01 per share. The warrants expired on October 29, 2018, and the holders of 110,646 unexercised warrants as of the expiration date are no longer entitled to receive any shares of our common stock. Holders exercised 23,217,208 and 9,774,052 warrants to purchase shares of our common stock in 2018 and 2017 , respectively. Dividend Reinvestment and Common Stock Purchase Plans Participants in our dividend reinvestment and common stock direct purchase plans may purchase shares of our common stock at fair market value by reinvesting dividends and/or making optional cash payments, under the plan’s terms. Employee Stock Plans We offer stock-based employee compensation plans as described below. For information on our accounting for stock-based compensation plans, see Note 1 (Summary of Significant Accounting Policies). LONG-TERM INCENTIVE COMPENSATION PLANS Our Long- Term Incentive Compensation Plan (LTICP) provides for awards of incentive and nonqualified stock options, stock appreciation rights, restricted shares, restricted share rights (RSRs), performance share awards (PSAs), performance units and stock awards with or without restrictions. Beginning in 2010, we granted RSRs and performance shares as our primary long-term incentive awards instead of stock options. Holders of RSRs are entitled to the related shares of common stock at no cost generally vesting over three to five years after the RSRs were granted. Subject to compliance with applicable laws, rules and regulations, RSRs generally continue to vest and are distributed after retirement according to the original vesting schedule. Except for retirement and other limited circumstances, RSRs are canceled when employment ends. Holders of each vested PSA are entitled to the related shares of common stock at no cost. Subject to compliance with applicable laws, rules, and regulations, PSAs continue to vest and are distributed after retirement according to the original vesting schedule subject to satisfying the performance criteria and other vesting conditions. Holders of RSRs and PSAs may be entitled to receive additional RSRs and PSAs (dividend equivalents) or cash payments equal to the cash dividends that would have been paid had the RSRs or PSAs been issued and outstanding shares of common stock. RSRs and PSAs granted as dividend equivalents are subject to the same vesting schedule and conditions as the underlying award. Stock options must have an exercise price at or above fair market value (as defined in the plan) of the stock at the date of grant (except for substitute or replacement options granted in connection with mergers or other acquisitions) and a term of no more than 10 years . Options generally become exercisable over three years beginning on the first anniversary of the date of grant. Except as otherwise permitted under the plan, if employment is ended for reasons other than retirement, permanent disability or death, the option exercise period is reduced or the options are canceled. Compensation expense for most of our RSRs, and PSAs granted prior to 2013 is based on the quoted market price of the related stock at the grant date; beginning in 2013 certain RSRs and all PSAs granted include discretionary conditions that can result in forfeiture and are subject to variable accounting. For these awards, the associated compensation expense fluctuates with changes in our stock price. Table 20.2 summarizes the major components of stock incentive compensation expense and the related recognized tax benefit. Table 20.2: Stock Incentive Compensation Expense Year ended December 31, (in millions) 2018 2017 2016 RSRs (1) $ 1,013 743 692 Performance shares 9 112 87 Stock options — (6 ) — Total stock incentive compensation expense (2) $ 1,022 849 779 Related recognized tax benefit $ 252 320 294 (1) In February 2018, a total of 11.9 million RSRs were granted to all eligible team members in the U.S., and eligible team members outside the U.S., referred to as broad-based RSRs. (2) Amounts for the year-ended December 31, 2018, were net of $19 million related to reversal of previously accrued RSR costs. Year-ended December 31, 2017, were net of $26 million related to clawback credits taken against a prior PSA awarded under our LTICP. For various acquisitions and mergers, we converted employee and director stock options of acquired or merged companies into stock options to purchase our common stock based on the terms of the original stock option plan and the agreed-upon exchange ratio. In addition, we converted restricted stock awards into awards that entitle holders to our stock after the vesting conditions are met. Holders receive cash dividends on outstanding awards if provided in the original award. The total number of shares of common stock available for grant under the plans at December 31, 2018 , was 92 million . Director Awards Beginning in 2011, we granted only common stock awards under the LTICP to non-employee directors elected or re-elected at the annual meeting of stockholders and prorated awards to directors who join the Board at any other time. Stock awards vest immediately. Options also were granted to directors prior to 2011 and can be exercised after 12 months through the tenth anniversary of the grant date. Restricted Share Rights A summary of the status of our RSRs and restricted share awards at December 31, 2018 , and changes during 2018 is presented in Table 20.3 . Table 20.3: Restricted Share Rights Number Weighted- average grant-date fair value Nonvested at January 1, 2018 34,894,376 $ 50.95 Granted 28,023,158 58.47 Vested (14,571,562 ) 52.12 Canceled or forfeited (2,773,474 ) 56.76 Nonvested at December 31, 2018 45,572,498 54.85 The weighted-average grant date fair value of RSRs granted during 2017 and 2016 was $57.54 and $48.31 , respectively. At December 31, 2018 , there was $1.1 billion of total unrecognized compensation cost related to nonvested RSRs. The cost is expected to be recognized over a weighted-average period of 2.0 years . The total fair value of RSRs that vested during 2018 , 2017 and 2016 was $824 million , $865 million and $1.1 billion , respectively. Performance Share Awards Holders of PSAs are entitled to the related shares of common stock at no cost subject to the Company’s achievement of specified performance criteria over a three -year period. PSAs are granted at a target number; based on the Company’s performance, the number of awards that vest can be adjusted downward to zero and upward to a maximum of either 125% or 150% of target. The awards vest in the quarter after the end of the performance period. For PSAs whose performance period ended December 31, 2018 , the determination of the number of performance shares that will vest will occur in first quarter of 2019 after review of the Company’s performance by the Human Resources Committee of the Board of Directors. Beginning in 2013, PSAs granted include discretionary conditions that can result in forfeiture and are subject to variable accounting. For these awards, the associated compensation expense fluctuates with changes in our stock price and the estimated outcome of meeting the performance conditions. The total expense that will be recognized on these awards cannot be finalized until the determination of the awards that will vest. A summary of the status of our PSAs at December 31, 2018 , and changes during 2018 is in Table 20.4 , based on the performance adjustments recognized as of December 2018 . Table 20.4: Performance Share Awards Number Weighted- average grant-date fair value (1) Nonvested at January 1, 2018 5,492,104 $ 47.81 Granted 2,570,300 58.62 Vested (1,879,523 ) 55.21 Canceled or forfeited (198,195 ) 54.48 Nonvested at December 31, 2018 5,984,686 49.91 (1) Reflects approval date fair value for grants subject to variable accounting. The weighted-average grant date fair value of performance awards granted during 2017 and 2016 was $57.14 and $44.73 , respectively. At December 31, 2018 , there was $26 million of total unrecognized compensation cost related to nonvested performance awards. The cost is expected to be recognized over a weighted-average period of 1.5 years . The total fair value of PSAs that vested during 2018 , 2017 and 2016 was $107 million , $117 million , and $220 million , respectively. Stock Options Table 20.5 summarizes stock option activity and related information for the stock plans. Options assumed in mergers are included in the activity and related information for Incentive Compensation Plans if originally issued under an employee plan, and in the activity and related information for Director Awards if originally issued under a director plan. Table 20.5: Stock Option Activity Number Weighted- average exercise price Weighted- average remaining contractual term (in yrs.) Aggregate intrinsic value (in millions) Incentive compensation plans Options outstanding as of December 31, 2017 20,179,179 $ 32.80 Canceled or forfeited (1,886,251 ) 172.36 Exercised (9,949,771 ) 22.50 Options exercisable and outstanding as of December 31, 2018 8,343,157 13.46 0.2 $ 272 Director awards Options outstanding as of December 31, 2017 104,900 29.87 Exercised (104,900 ) 29.88 Options exercisable and outstanding as of December 31, 2018 — — 0.0 — The total intrinsic value to option holders, which is the stock market value in excess of the option exercise price, of options exercised during 2018 , 2017 and 2016 was $375 million , $623 million and $546 million , respectively. Cash received from the exercise of stock options for 2018 , 2017 and 2016 was $227 million , $602 million and $893 million , respectively. We do not have a specific policy on repurchasing shares to satisfy share option exercises. Rather, we have a general policy on repurchasing shares to meet common stock issuance requirements for our benefit plans (including share option exercises), conversion of our convertible securities, acquisitions and other corporate purposes. Various factors determine the amount and timing of our share repurchases, including our capital requirements, the number of shares we expect to issue for acquisitions and employee benefit plans, market conditions (including the trading price of our stock), and regulatory and legal considerations. These factors can change at any time, and there can be no assurance as to the number of shares we will repurchase or when we will repurchase them. Employee Stock Ownership Plan The Wells Fargo & Company 401(k) Plan (401(k) Plan) is a defined contribution plan with an Employee Stock Ownership Plan (ESOP) feature. The ESOP feature enables the 401(k) Plan to borrow money to purchase our preferred or common stock. From 1994 through 2018 , with the exception of 2009, we loaned money to the 401(k) Plan to purchase shares of our ESOP preferred stock. As our employer contributions are made to the 401(k) Plan and are used by the 401(k) Plan to make ESOP loan payments, the ESOP preferred stock in the 401(k) Plan is released and converted into our common stock shares. Dividends on the common stock shares allocated as a result of the release and conversion of the ESOP preferred stock reduce retained earnings, and the shares are considered outstanding for computing earnings per share. Dividends on the unallocated ESOP preferred stock do not reduce retained earnings, and the shares are not considered to be common stock equivalents for computing earnings per share. Loan principal and interest payments are made from our employer contributions to the 401(k) Plan, along with dividends paid on the ESOP preferred stock. With each principal and interest payment, a portion of the ESOP preferred stock is released and converted to common stock shares, which are allocated to the 401(k) Plan participants and invested in the Wells Fargo ESOP Fund within the 401(k) Plan. Table 20.6 presents the balance of common stock and unreleased preferred stock held in the Wells Fargo ESOP fund, the fair value of unreleased ESOP preferred stock and the dividends on allocated shares of common stock and unreleased ESOP Preferred Stock paid to the 401(k) Plan. Table 20.6: Common Stock and Unreleased Preferred Stock in the Wells Fargo ESOP Fund Shares outstanding December 31, (in millions, except shares) 2018 2017 2016 Allocated shares (common) 138,182,911 124,670,717 128,189,305 Unreleased shares (preferred) 1,406,460 1,556,104 1,439,181 Fair value of unreleased ESOP preferred shares $ 1,407 1,556 1,439 Dividends paid Year ended December 31, 2018 2017 2016 Allocated shares (common) $ 213 195 208 Unreleased shares (preferred) 159 166 169 Deferred Compensation Plan for Independent Sales Agents WF Deferred Compensation Holdings, Inc. is a wholly-owned subsidiary of the Parent formed solely to sponsor a deferred compensation plan for independent sales agents who provide investment, financial and other qualifying services for or with respect to participating affiliates. The Nonqualified Deferred Compensation Plan for Independent Contractors, which became effective January 1, 2002, allowed participants to defer all or part of their eligible compensation payable to them by a participating affiliate. The plan was frozen for new compensation deferrals effective January 1, 2012. The Parent has fully and unconditionally guaranteed the deferred compensation obligations of WF Deferred Compensation Holdings, Inc. under the plan.

Revenue from Contracts with Cus

Revenue from Contracts with Customers	12 Months Ended
	Dec. 31, 2018
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer [Text Block]	Note 21: Revenue from Contracts with Customers Our revenue includes net interest income on financial instruments and noninterest income. Table 21.1 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 Community Banking distribution channels. For additional description of our operating segments, including additional financial information and the underlying management accounting process, see Note 26 (Operating Segments) to Financial Statements in this Report. We adopted ASU 2014-09 – Revenue from Contracts with Customers ( “ the new revenue recognition guidance”) on a modified retrospective basis as of January 1, 2018. Under this method of adoption, prior period financial information for 2017 and 2016 was not adjusted. Rather, this ASU resulted in a cumulative-effect adjustment that decreased the beginning balance of retained earnings by $32 million on January 1, 2018, and changed the presentation of certain revenues and expenses prospectively. For details on the impact of the adoption of this ASU, see Note 1 (Summary of Significant Accounting Policies). Table 21.1 : Revenue by Operating Segment Year ended December 31, 2018 (in millions) Community Banking Wholesale Banking Wealth and Investment Management Other (3) Consolidated Net interest income (1) $ 29,219 18,690 4,441 (2,355 ) 49,995 Noninterest income: Service charges on deposit accounts 2,641 2,074 16 (15 ) 4,716 Trust and investment fees: Brokerage advisory, commissions and other fees 1,887 317 9,161 (1,929 ) 9,436 Trust and investment management 910 445 2,893 (932 ) 3,316 Investment banking (35 ) 1,783 9 — 1,757 Total trust and investment fees 2,762 2,545 12,063 (2,861 ) 14,509 Card fees 3,543 362 6 (4 ) 3,907 Other fees: Lending related charges and fees (1)(2) 278 1,247 7 (6 ) 1,526 Cash network fees 478 3 — — 481 Commercial real estate brokerage commissions — 468 — — 468 Wire transfer and other remittance fees 264 209 8 (4 ) 477 All other fees (1) 339 92 2 (1 ) 432 Total other fees 1,359 2,019 17 (11 ) 3,384 Mortgage banking (1) 2,659 362 (11 ) 7 3,017 Insurance (1) 83 312 82 (48 ) 429 Net gains from trading activities (1) 28 516 57 1 602 Net gains (losses) on debt securities (1) (3 ) 102 9 — 108 Net gains from equity investments (1) 1,505 293 (283 ) — 1,515 Lease income (1) — 1,753 — — 1,753 Other income of the segment (1) 3,117 (322 ) (21 ) (301 ) 2,473 Total noninterest income 17,694 10,016 11,935 (3,232 ) 36,413 Revenue $ 46,913 28,706 16,376 (5,587 ) 86,408 Year ended December 31, 2017 Net interest income (1) $ 28,658 18,810 4,641 (2,552 ) 49,557 Noninterest income: Service charges on deposit accounts 2,909 2,201 17 (16 ) 5,111 Trust and investment fees: Brokerage advisory, commissions and other fees 1,830 304 9,072 (1,848 ) 9,358 Trust and investment management 889 523 2,877 (917 ) 3,372 Investment banking (59 ) 1,827 (2 ) (1 ) 1,765 Total trust and investment fees 2,660 2,654 11,947 (2,766 ) 14,495 Card fees 3,613 345 6 (4 ) 3,960 Other fees: Lending related charges and fees (1)(2) 311 1,257 8 (8 ) 1,568 Cash network fees 498 8 — — 506 Commercial real estate brokerage commissions 1 461 — — 462 Wire transfer and other remittance fees 239 204 9 (4 ) 448 All other fees (1) 448 124 1 — 573 Total other fees 1,497 2,054 18 (12 ) 3,557 Mortgage banking (1) 3,895 458 (10 ) 7 4,350 Insurance (1) 139 872 88 (50 ) 1,049 Net gains from trading activities (1) (251 ) 701 92 — 542 Net gains (losses) on debt securities (1) 709 (232 ) 2 — 479 Net gains from equity investments (1) 1,455 116 208 — 1,779 Lease income (1) — 1,907 — — 1,907 Other income of the segment (1) 1,734 114 63 (308 ) 1,603 Total noninterest income 18,360 11,190 12,431 (3,149 ) 38,832 Revenue $ 47,018 30,000 17,072 (5,701 ) 88,389 (continued on following page) (continued from previous page) Year ended December 31, 2016 Community Banking Wholesale Banking Wealth and Investment Management Other (3) Consolidated Net interest income (1) $ 27,333 18,699 4,249 (2,527 ) 47,754 Noninterest income: Service charges on deposit accounts 3,111 2,260 19 (18 ) 5,372 Trust and investment fees: Brokerage advisory, commissions and other fees 1,854 368 8,870 (1,876 ) 9,216 Trust and investment management 849 473 2,891 (877 ) 3,336 Investment banking (141 ) 1,833 (1 ) — 1,691 Total trust and investment fees 2,562 2,674 11,760 (2,753 ) 14,243 Card fees 3,598 336 6 (4 ) 3,936 Other fees: Lending related charges and fees (1)(2) 364 1,198 8 (8 ) 1,562 Cash network fees 528 9 — — 537 Commercial real estate brokerage commissions — 494 — — 494 Wire transfer and other remittance fees 219 178 8 (4 ) 401 All other fees (1) 525 206 2 — 733 Total other fees 1,636 2,085 18 (12 ) 3,727 Mortgage banking (1) 5,624 475 (9 ) 6 6,096 Insurance (1) 112 1,156 — — 1,268 Net gains from trading activities (1) (148 ) 677 81 — 610 Net gains (losses) on debt securities (1) 933 8 1 — 942 Net gains from equity investments (1) 804 199 100 — 1,103 Lease income (1) — 1,927 — — 1,927 Other income of the segment (1) 948 551 53 (263 ) 1,289 Total noninterest income 19,180 12,348 12,029 (3,044 ) 40,513 Revenue $ 46,513 31,047 16,278 (5,571 ) 88,267 (1) Most of our revenue is not within the scope of Accounting Standards Update (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. (2) Represents combined amount of previously reported “Charges and fees on loans” and “Letters of credit fees”. (3) 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 Community Banking distribution channels. 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 21.2 presents our service charges on deposit accounts by operating segment. Table 21.2 : Service Charges on Deposit Accounts by Operating Segment Year ended December 31, Community Banking Wholesale Banking Wealth and Investment Management Other Consolidated (in millions) 2018 2017 2016 2018 2017 2016 2018 2017 2016 2018 2017 2016 2018 2017 2016 Overdraft fees $ 1,776 1,941 2,024 5 6 6 1 1 — — — — 1,782 1,948 2,030 Account charges 865 968 1,087 2,069 2,195 2,254 15 16 19 (15 ) (16 ) (18 ) 2,934 3,163 3,342 Service charges on deposit accounts $ 2,641 2,909 3,111 2,074 2,201 2,260 16 17 19 (15 ) (16 ) (18 ) 4,716 5,111 5,372 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 21.3 presents our brokerage advisory, commissions and other fees by operating segment. Table 21.3 : Brokerage Advisory, Commissions and Other Fees by Operating Segment Year ended December 31, Community Banking Wholesale Banking Wealth and Investment Management Other Consolidated (in millions) 2018 2017 2016 2018 2017 2016 2018 2017 2016 2018 2017 2016 2018 2017 2016 Asset-based revenue (1) $ 1,482 1,372 1,243 1 1 2 6,899 6,630 6,164 (1,484 ) (1,371 ) (1,241 ) 6,898 6,632 6,168 Transactional revenue 340 382 454 70 40 55 1,618 1,802 2,032 (380 ) (400 ) (477 ) 1,648 1,824 2,064 Other revenue 65 76 157 246 263 311 644 640 674 (65 ) (77 ) (158 ) 890 902 984 Brokerage advisory, commissions and other fees $ 1,887 1,830 1,854 317 304 368 9,161 9,072 8,870 (1,929 ) (1,848 ) (1,876 ) 9,436 9,358 9,216 (1) We earned trailing commissions of $1.3 billion for each of the years ended December 31, 2018 , 2017 , and 2016 . 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 21.4 presents our trust and investment management fees by operating segment. Table 21.4 : Trust and Investment Management Fees by Operating Segment Year ended December 31, Community Banking Wholesale Banking Wealth and Investment Management Other Consolidated (in millions) 2018 2017 2016 2018 2017 2016 2018 2017 2016 2018 2017 2016 2018 2017 2016 Investment management fees $ — 1 — — — — 2,087 2,053 2,079 — — — 2,087 2,054 2,079 Trust fees 908 887 847 329 421 399 728 757 738 (932 ) (916 ) (875 ) 1,033 1,149 1,109 Other revenue 2 1 2 116 102 74 78 67 74 — (1 ) (2 ) 196 169 148 Trust and investment management fees $ 910 889 849 445 523 473 2,893 2,877 2,891 (932 ) (917 ) (877 ) 3,316 3,372 3,336 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. Substantially all of these fees are in the Wholesale Banking operating segment. CARD FEES include credit and debit card interchange and network revenues and various card-related fees. 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 21.5 presents our card fees by operating segment. Table 21.5 : Card Fees by Operating Segment Year ended December 31, Community Banking Wholesale Banking Wealth and Investment Management Other Consolidated (in millions) 2018 2017 2016 2018 2017 2016 2018 2017 2016 2018 2017 2016 2018 2017 2016 Credit card interchange and network revenues (1) $ 792 944 959 361 345 329 6 6 6 (4 ) (4 ) (4 ) 1,155 1,291 1,290 Debit card interchange and network revenues 2,053 1,964 1,889 — — 7 — — — — — — 2,053 1,964 1,896 Late fees, cash advance fees, balance transfer fees, and annual fees 698 705 750 1 — — — — — — — — 699 705 750 Card fees (1) $ 3,543 3,613 3,598 362 345 336 6 6 6 (4 ) (4 ) (4 ) 3,907 3,960 3,936 (1) The cost of credit card rewards and rebates of $1.4 billion , $1.2 billion and $1.0 billion for the years ended December 31, 2018 , 2017 and 2016 , 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. Substantially all of these fees are in the Community Banking operating segment. 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. All of these fees are in the Wholesale Banking operating segment. 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. Substantially all of these fees are in the Community Banking and Wholesale Banking operating segments. 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. Most of these fees are in the Community Banking operating segment.

Employee Benefits and Other Exp

Employee Benefits and Other Expenses	12 Months Ended
	Dec. 31, 2018
Defined Benefit Plan [Abstract]
Employee Benefits and Other Expenses	Note 22: Employee Benefits and Other Expenses Pension and Postretirement Plans 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. Prior to July 1, 2009, eligible employees’ Cash Balance Plan accounts were allocated a compensation credit based on a percentage of their certified compensation; the freeze discontinued the allocation of compensation credits after June 30, 2009. Investment credits continue to be allocated to participants’ accounts based on their accumulated balances. We did not make a contribution to our Cash Balance Plan in 2018 . We do not expect that we will be required to make a contribution to the Cash Balance Plan in 2019 ; however, this is dependent on the finalization of the actuarial valuation in 2019 . Our decision of whether to make a contribution in 2019 will be based on various factors including the actual investment performance of plan assets during 2019 . Given these uncertainties, we cannot estimate at this time the amount, if any, that we will contribute in 2019 to the Cash Balance Plan. For the nonqualified pension plans and postretirement benefit plans, there is no minimum required contribution beyond the amount needed to fund benefit payments; we may contribute more to our postretirement benefit plans dependent on various factors. We recognize settlement losses for our Cash Balance Plan based on assessing whether lump sum payments will, in aggregate for the year, exceed the sum of its annual service and interest cost (threshold). In 2018, lump sum payments (included in the “Benefits paid” line in Table 22.1) exceeded this threshold. Settlement losses of $134 million were recognized in 2018 , representing the pro rata portion of the net loss in cumulative other comprehensive income based on the percentage reduction in the Cash Balance Plan’s projected benefit obligation attributable to 2018 lump sum payments. We sponsored the Pension and Life Assurance Plan of Wachovia Bank to employees in the United Kingdom (UK Pension Plan). In September 2017, an annuity contract was entered into that effected a full settlement of this UK Pension Plan, resulting in a plan settlement of $ 74 million and a settlement loss of $ 7 million . Our nonqualified defined benefit plans are unfunded and provide supplemental defined benefit pension benefits to certain eligible employees. The benefits under these plans were frozen in prior years. We provide health care and life insurance benefits for certain retired employees, and we reserve the right to amend, modify or terminate any of the benefits at any time. The benefit obligation for the qualified plans, nonqualified plans and other benefits plans was $10.1 billion , $557 million and $555 million , respectively, at December 31, 2018, a decrease from $11.1 billion , $621 million and $611 million , respectively, at December 31, 2017. The decreases were primarily due to benefits paid (net of participant contributions), and actuarial gains, reflecting an increase in the discount rates, see Table 22.5 . The information set forth in the following tables is based on current actuarial reports using the measurement date of December 31 for our pension and postretirement benefit plans. Table 22.1 presents the changes in the benefit obligation and the fair value of plan assets, the funded status, and the amounts recognized on the balance sheet. Table 22.1: Changes in Benefit Obligation and Fair Value of Plan Assets December 31, 2018 December 31, 2017 Pension benefits Pension benefits (in millions) Qualified Non- qualified Other benefits Qualified Non- qualified Other benefits Change in benefit obligation: Benefit obligation at beginning of year $ 11,110 621 611 10,774 630 731 Service cost 11 — — 5 — — Interest cost 392 21 21 412 24 28 Plan participants’ contributions — — 48 — — 40 Actuarial loss (gain) (674 ) (27 ) (33 ) 634 46 (102 ) Benefits paid (719 ) (57 ) (92 ) (651 ) (79 ) (88 ) Medicare Part D subsidy — — 2 — — 1 Amendment 1 — — — — — Settlement — — — (74 ) — — Other 13 — — — — — Foreign exchange impact (5 ) (1 ) (2 ) 10 — 1 Benefit obligation at end of year 10,129 557 555 11,110 621 611 Change in plan assets: Fair value of plan assets at beginning of year 10,667 — 565 10,120 — 549 Actual return on plan assets (478 ) — (17 ) 1,253 — 56 Employer contribution 10 57 5 11 79 7 Plan participants’ contributions — — 48 — — 40 Benefits paid (719 ) (57 ) (92 ) (651 ) (79 ) (88 ) Medicare Part D subsidy — — 2 — — 1 Settlement — — — (74 ) — — Other 1 — — — — — Foreign exchange impact (4 ) — — 8 — — Fair value of plan assets at end of year 9,477 — 511 10,667 — 565 Funded status at end of year $ (652 ) (557 ) (44 ) (443 ) (621 ) (46 ) Amounts recognized on the balance sheet at end of year: Assets $ 1 — — — — — Liabilities (653 ) (557 ) (44 ) (443 ) (621 ) (46 ) Table 22.2 provides information for pension and post retirement plans with benefit obligations in excess of plan assets. Table 22.2: Plans with Benefit Obligations in Excess of Plan Assets December 31, 2018 December 31, 2017 (in millions) Pension Benefits Other Benefits Pension Benefits Other Benefits Projected benefit obligation $ 10,640 N/A 11,721 N/A Accumulated benefit obligation 10,627 555 11,717 611 Fair value of plan assets 9,429 511 10,656 565 Table 22.3 presents the components of net periodic benefit cost and other comprehensive income (OCI). Table 22.3: Net Periodic Benefit Cost and Other Comprehensive Income December 31, 2018 December 31, 2017 December 31, 2016 Pension benefits Pension benefits Pension benefits (in millions) Qualified Non- qualified Other benefits Qualified Non- qualified Other benefits Qualified Non- qualified Other benefits Service cost $ 11 — — 5 — — 3 — — Interest cost (1) 392 21 21 412 24 28 422 26 39 Expected return on plan assets (1) (641 ) — (31 ) (652 ) — (30 ) (608 ) — (30 ) Amortization of net actuarial loss (gain) (1) 131 14 (18 ) 148 11 (9 ) 146 12 (5 ) Amortization of prior service credit (1) — — (10 ) — — (10 ) — — (2 ) Settlement loss (1) 134 2 — 7 6 — 5 2 — Net periodic benefit cost 27 37 (38 ) (80 ) 41 (21 ) (32 ) 40 2 Other changes in plan assets and benefit obligations recognized in other comprehensive income: Net actuarial loss (gain) 445 (27 ) 15 33 46 (128 ) 302 9 (82 ) Amortization of net actuarial gain (loss) (131 ) (14 ) 18 (148 ) (11 ) 9 (146 ) (12 ) 5 Prior service cost (credit) (2) 1 — — 1 — — — — (177 ) Amortization of prior service credit — — 10 — — 10 — — 2 Settlement (134 ) (2 ) — (8 ) (6 ) — (5 ) (2 ) — Total recognized in other comprehensive income 181 (43 ) 43 (122 ) 29 (109 ) 151 (5 ) (252 ) Total recognized in net periodic benefit cost and other comprehensive income $ 208 (6 ) 5 (202 ) 70 (130 ) 119 35 (250 ) (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 and 2016 , these balances were reported in employee benefits. (2) In 2016, a prior service credit of $177 million was recognized for an amendment that reduced the Wells Fargo & Company Retiree Plan obligation. Table 22.4 provides the amounts recognized in cumulative OCI (pre tax). Table 22.4: Benefits Recognized in Cumulative OCI December 31, 2018 December 31, 2017 Pension benefits Pension benefits (in millions) Qualified Non- qualified Other benefits Qualified Non- qualified Other benefits Net actuarial loss (gain) $ 3,336 149 (327 ) 3,156 192 (360 ) Net prior service cost (credit) 1 — (156 ) — — (166 ) Total $ 3,337 149 (483 ) 3,156 192 (526 ) Plan Assumptions For additional information on our pension accounting assumptions, see Note 1 (Summary of Significant Accounting Policies). Table 22.5 presents the weighted-average assumptions used to estimate the projected benefit obligation for pension benefits. Table 22.5: Weighted-Average Assumptions Used to Estimate Projected Benefit Obligation December 31, 2018 December 31, 2017 Pension benefits Pension benefits Qualified Non- qualified Other benefits Qualified Non- qualified Other benefits Discount rate 4.30 % 4.20 4.24 3.65 3.55 3.54 Interest crediting rate 3.22 2.18 N/A 2.74 1.54 N/A Table 22.6 presents the weighted-average assumptions used to determine the net periodic benefit cost. Table 22.6: Weighted-Average Assumptions Used to Determine Net Periodic Benefit Cost December 31, 2018 December 31, 2017 December 31, 2016 Pension benefits Pension benefits Pension benefits Qualified Non- qualified Other benefits Qualified Non- qualified Other benefits Qualified Non- qualified Other benefits Discount rate (1) 3.65 % 3.65 3.54 3.98 3.93 4.00 3.99 4.11 4.16 Interest crediting rate (1) 2.74 1.68 N/A 2.92 1.85 N/A 3.03 2.02 N/A Expected return on plan assets 6.24 N/A 5.75 6.70 N/A 5.75 6.75 N/A 5.75 (1) Includes the impact of interim re-measurements as applicable. To account for postretirement health care plans, we used health care cost trend rates to recognize the effect of expected changes in future health care costs due to medical inflation, utilization changes, new technology, regulatory requirements and Medicare cost shifting. In determining the end of year benefit obligation, we assumed an average annual increase of approximately 8.40% for health care costs in 2019 . This rate is assumed to trend down 0.50% - 0.60% per year until the trend rate reaches an ultimate rate of 4.50% in 2026 . The 2018 periodic benefit cost was determined using an initial annual trend rate of 9.00% . This rate was assumed to decrease 0.40% - 0.70% per year until the trend rate reached an ultimate rate of 4.50% in 2026 . Investment Strategy and Asset Allocation We seek to achieve the expected long-term rate of return with a prudent level of risk, given the benefit obligations of the pension plans and their funded status. Our overall investment strategy is designed to provide our Cash Balance Plan with long-term growth opportunities while ensuring that risk is mitigated through diversification across numerous asset classes and various investment strategies. We target the asset allocation for our Cash Balance Plan at a target mix range of 25% - 45% equities, 45% - 65% fixed income, and approximately 10% in real estate, venture capital, private equity and other investments. The Employee Benefit Review Committee (EBRC), which includes several members of senior management, formally reviews the investment risk and performance of our Cash Balance Plan on a quarterly basis. Annual Plan liability analysis and periodic asset/liability evaluations are also conducted. Other benefit plan assets include (1) assets held in a 401(h) trust, which are invested with a target mix of 40% - 60% for both equities and fixed income, and (2) assets held in the Retiree Medical Plan Voluntary Employees’ Beneficiary Association (VEBA) trust, which are invested with a general target asset mix of 20% - 40% equities and 60% - 80% fixed income. Members of the EBRC formally review the investment risk and performance of these assets on a quarterly basis. Projected Benefit Payments Future benefits that we expect to pay under the pension and other benefit plans are presented in Table 22.7 . Table 22.7: Projected Benefit Payments Pension benefits (in millions) Qualified Non- qualified Other Benefits Year ended December 31, 2019 $ 784 52 46 2020 771 50 48 2021 767 49 48 2022 759 46 47 2023 711 44 46 2024-2028 3,381 199 198 Fair Value of Plan Assets Table 22.8 presents the balances of pension plan assets and other benefit plan assets measured at fair value. See Note 18 (Fair Values of Assets and Liabilities) for fair value hierarchy level definitions. Table 22.8: Pension and Other Benefit Plan Assets Carrying value at year end Pension plan assets Other benefits plan assets (in millions) Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total December 31, 2018 Cash and cash equivalents $ 2 284 — 286 69 22 — 91 Long duration fixed income (1) 902 4,414 — 5,316 — — — — Intermediate (core) fixed income (2) — 118 — 118 — 183 — 183 High-yield fixed income — 114 — 114 — — — — International fixed income 55 186 — 241 — — — — Domestic large-cap stocks (3) 582 238 — 820 — 115 — 115 Domestic mid-cap stocks 167 89 — 256 — 28 — 28 Domestic small-cap stocks 141 7 — 148 — 17 — 17 Global stocks (4) 72 357 — 429 — — — — International stocks (5) 449 110 — 559 9 40 — 49 Emerging market stocks — 205 — 205 — — — — Real estate 148 33 14 195 — — — — Hedge funds/absolute return 63 32 — 95 — — — — Other 34 44 8 86 4 — 24 28 Plan investments - excluding investments at NAV $ 2,615 6,231 22 8,868 82 405 24 511 Investments at NAV (6) 566 — Net receivables 43 — Total plan assets $ 9,477 511 December 31, 2017 Cash and cash equivalents $ 1 234 — 235 85 23 — 108 Long duration fixed income (1) 875 4,424 — 5,299 — — — — Intermediate (core) fixed income (2) — 255 — 255 — 185 — 185 High-yield fixed income — 267 — 267 — — — — International fixed income 60 223 — 283 — — — — Domestic large-cap stocks (3) 825 300 — 1,125 — 130 — 130 Domestic mid-cap stocks 227 133 — 360 — 34 — 34 Domestic small-cap stocks 224 12 — 236 — 20 — 20 Global stocks (4) 89 391 — 480 — — — — International stocks (5) 542 257 — 799 23 38 — 61 Emerging market stocks — 305 — 305 — — — — Real estate 157 31 20 208 — — — — Hedge funds/absolute return 62 28 — 90 — — — — Other — 72 8 80 3 — 23 26 Plan investments - excluding investments at NAV $ 3,062 6,932 28 10,022 111 430 23 564 Investments at NAV (6) 594 — Net receivables 51 1 Total plan assets $ 10,667 565 (1) This category includes a diversified mix of assets, which are being managed in accordance with a duration target of approximately 10 years and an emphasis on corporate credit bonds combined with investments in U.S. Treasury securities and other U.S. agency and non-agency bonds. (2) This category includes assets that are intermediate duration, investment grade bonds held in investment strategies benchmarked to the Bloomberg Barclays Capital U.S. Aggregate Bond Index, including U.S. Treasury securities, agency and non-agency asset-backed bonds and corporate bonds. (3) This category covers a broad range of investment styles, including active, enhanced index and passive approaches, as well as style characteristics of value, core and growth emphasized strategies. Assets in this category are currently diversified across eight unique investment strategies with no single investment manager strategy representing more than 2.0% of total plan assets. (4) This category consists of five unique investment strategies providing exposure to broadly diversified, global equity investments, which generally have an allocation of 40 - 60% in U.S. domiciled equities and an equivalent allocation range in non-U.S. equities, with no single strategy representing more than 1.5% of total Plan assets. (5) This category includes assets diversified across four unique investment strategies providing exposure to companies in developed market, non-U.S. countries with no single strategy representing more than 2.5% of total plan assets. (6) Consists of certain investments 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. Table 22.9 presents the changes in Level 3 pension plan and other benefit plan assets measured at fair value. Table 22.9: Fair Value Level 3 Pension and Other Benefit Plan Assets Balance beginning of year Gains (losses) Purchases, sales and settlements (net) Transfers Into/ (Out of) Level 3 Balance end of year (in millions) Realized Unrealized (1) Quarter ended December 31, 2018 Pension plan assets: Real estate $ 20 (2 ) (1 ) (3 ) — 14 Other 8 — — — — 8 Total pension plan assets $ 28 (2 ) (1 ) (3 ) — 22 Other benefits plan assets: Other $ 23 1 — — — 24 Total other benefit plan assets $ 23 1 — — — 24 Quarter ended December 31, 2017 Pension plan assets: Long duration fixed income $ 19 — — — (19 ) — Real estate 25 (3 ) 5 (4 ) (3 ) 20 Other 8 — — — — 8 Total pension plan assets $ 52 (3 ) 5 (4 ) (22 ) 28 Other benefits plan assets: Other $ 23 — — — — 23 Total other benefit plan assets $ 23 — — — — 23 (1) All unrealized gains (losses) relate to instruments held at period end. VALUATION METHODOLOGIES Following is a description of the valuation methodologies used for assets measured at fair value. Cash and Cash Equivalents – includes investments in collective investment funds valued at fair value based upon the fund’s NAV per share held at year-end. The NAV per share is quoted on a private market that is not active; however, the NAV per share is based on underlying investments traded on an active market. This group of assets also includes investments in registered investment companies valued at the NAV per share held at year-end and in interest-bearing bank accounts. Long Duration, Intermediate (Core), High-Yield, and International Fixed Income – includes investments traded on the secondary markets; prices are measured by using quoted market prices for similar securities, pricing models, and discounted cash flow analyses using significant inputs observable in the market where available, or a combination of multiple valuation techniques. This group of assets also includes highly liquid government securities such as U.S. Treasuries, limited partnerships valued at the NAV, registered investment companies and collective investment funds described above. Domestic, Global, International and Emerging Market Stocks – investments in exchange-traded equity securities are valued at quoted market values. This group of assets also includes investments in registered investment companies and collective investment funds described above. Real Estate – includes investments in real estate, which are valued at fair value based on an income capitalization valuation approach. Market values are estimates, and the actual market price of the real estate can only be determined by negotiation between independent third parties in sales transactions. This group of assets also includes investments in exchange-traded equity securities and collective investment funds described above. Hedge Funds / Absolute Return – includes investments in registered investment companies, and limited partnerships, as described above. Other – insurance contracts that are stated at cash surrender value. This group of assets also includes investments in registered investment companies and collective investment funds described above. The methods described above may produce a fair value calculation that may not be indicative of net realizable value or reflective of future fair values. While we believe our valuation methods are appropriate and consistent with other market participants, the use of different methodologies or assumptions to determine the fair value of certain financial instruments could result in a different fair value measurement at the reporting date. Defined Contribution Retirement Plans We sponsor a qualified defined contribution retirement plan, the Wells Fargo & Company 401(k) Plan (401(k) Plan). Under the 401(k) Plan, after one month of service, eligible employees may contribute up to 50% of their certified compensation, subject to statutory limits. Eligible employees who complete one year of service are eligible for quarterly company matching contributions, which are generally dollar for dollar up to 6% of an employee’s eligible certified compensation. Matching contributions are 100% vested. The 401(k) Plan includes an employer discretionary profit sharing contribution feature to allow us to make a contribution to eligible employees’ 401(k) Plan accounts for a plan year. Eligible employees who complete one year of service are eligible for profit sharing contributions. Profit sharing contributions are vested after three years of service. Total defined contribution retirement plan expenses were $1.2 billion in each of the following years, 2018 , 2017 and 2016 . Other Expenses Table 22.10 presents expenses exceeding 1% of total interest income and noninterest income in any of the years presented that are not otherwise shown separately in the financial statements or Notes to Financial Statements. Table 22.10: Other Expenses Year ended December 31, (in millions) 2018 2017 2016 Outside professional services $ 3,306 3,813 3,138 Operating losses 3,124 5,492 1,608 Contract services (1) 2,192 1,638 1,497 Credit card rewards and rebates (2) 1,401 1,201 1,047 Operating leases 1,334 1,351 1,329 Outside data processing 660 891 888 (1) The periods prior to 2018 have been revised to conform with the current period presentation whereby temporary help is included in contract services rather than in all other noninterest expense. (2) Noninterest income from card fees is net of cardholder rewards and rebates expense.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Income Taxes	Note 23: Income Taxes On December 22, 2017, the Tax Cuts & Jobs Act (Tax Act) was enacted resulting in significant changes to both domestic tax law and the U.S taxation of foreign subsidiaries. In 2018 , we re-measured our provisional estimates of the tax impacts that were recorded in 2017 . As a result, during 2018 the Company recognized a $164 million discrete tax expense for adjustments to the provisional tax impacts of the Tax Act included in its consolidated financial statement for the year ended December 31, 2017 . The accounting was completed in fourth quarter 2018. Table 23.1 presents the components of income tax expense. Table 23.1: Income Tax Expense Year ended December 31, (in millions) 2018 2017 2016 Current: Federal $ 2,382 3,507 6,712 State and local 1,140 561 1,395 Foreign 170 183 175 Total current 3,692 4,251 8,282 Deferred: Federal 1,706 156 1,498 State and local 236 564 296 Foreign 28 (54 ) (1 ) Total deferred 1,970 666 1,793 Total $ 5,662 4,917 10,075 The tax effects of our temporary differences that gave rise to significant portions of our deferred tax assets and liabilities are presented in Table 23.2 . Table 23.2: Net Deferred Tax Liability Dec 31, Dec 31, (in millions) 2018 2017 Deferred tax assets Allowance for loan losses $ 2,644 2,816 Deferred compensation and employee benefits 2,893 2,377 Accrued expenses 815 722 PCI loans 467 1,057 Net unrealized losses on debt securities 1,022 — Net operating loss and tax credit carry forwards 366 341 Other 1,272 986 Total deferred tax assets 9,479 8,299 Deferred tax assets valuation allowance (315 ) (397 ) Deferred tax liabilities Mortgage servicing rights (3,475 ) (3,421 ) Leasing (4,271 ) (4,084 ) Basis difference in investments (1,203 ) (577 ) Mark to market, net (7,252 ) (5,816 ) Intangible assets (427 ) (539 ) Net unrealized gains on debt securities — (55 ) Insurance reserves (696 ) (750 ) Other (831 ) (821 ) Total deferred tax liabilities (18,155 ) (16,063 ) Net deferred tax liability (1) $ (8,991 ) (8,161 ) (1) The net deferred tax liability is included in accrued expenses and other liabilities. Deferred taxes related to net unrealized gains (losses) on debt securities, net unrealized gains (losses) on derivatives, foreign currency translation, and employee benefit plan adjustments are recorded in cumulative OCI (see Note 25 (Other Comprehensive Income)). These associated adjustments increased OCI by $1.1 billion in 2018 . In 2018, we adopted ASU 2018-02 – Income Statement-Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income, and reclassified $400 million from OCI to retained earnings. See Note 1 (Summary of Significant Accounting Policies) and Note 25 (Other Comprehensive Income) for more information. We have determined that a valuation allowance is required for 2018 in the amount of $315 million , predominantly attributable to deferred tax assets in various state and foreign jurisdictions where we believe it is more likely than not that these deferred tax assets will not be realized. In these jurisdictions, carry back limitations, lack of sources of taxable income, and tax planning strategy limitations contributed to our conclusion that the deferred tax assets would not be realizable. We have concluded that it is more likely than not that the remaining deferred tax assets will be realized based on our history of earnings, sources of taxable income in carry back periods, and our ability to implement tax planning strategies. At December 31, 2018 , we had net operating loss carry forwards with related deferred tax assets of $366 million . If these carry forwards are not utilized, they will mostly expire in varying amounts through December 31, 2038 . In 2018, we finalized the recognition of the U.S. tax expense associated with the deemed repatriation of undistributed earnings of certain non-U.S. subsidiaries as required under the 2017 Tax Act. We do not intend to distribute these earnings in a taxable manner, and therefore intend to limit distributions to foreign earnings previously taxed in the U.S., that would qualify for the 100% dividends received deduction, and that would not result in any significant state or foreign taxes. All other undistributed foreign earnings will continue to be permanently reinvested outside the U.S. and the related tax liability on these earnings is insignificant. Table 23.3 reconciles the statutory federal income tax expense and rate to the effective income tax expense and rate. Our effective tax rate is calculated by dividing income tax expense by income before income tax expense less the net income from noncontrolling interests. Table 23.3: Effective Income Tax Expense and Rate December 31, 2018 2017 2016 (in millions) Amount Rate Amount Rate Amount Rate Statutory federal income tax expense and rate $ 5,892 21.0 % $ 9,485 35.0 % $ 11,204 35.0 % Change in tax rate resulting from: State and local taxes on income, net of federal income tax benefit 1,076 3.9 926 3.4 1,004 3.1 Tax-exempt interest (494 ) (1.8 ) (812 ) (3.0 ) (725 ) (2.2 ) Tax credits (1,537 ) (5.5 ) (1,419 ) (5.2 ) (1,251 ) (3.9 ) Non-deductible accruals 236 0.8 1,320 4.9 81 0.3 Tax reform 164 0.6 (3,713 ) (13.7 ) — — Other 325 1.2 (870 ) (3.3 ) (238 ) (0.8 ) Effective income tax expense and rate $ 5,662 20.2 % $ 4,917 18.1 % $ 10,075 31.5 % The 2018 effective income tax rate was 20.2% , compared with 18.1% in 2017 and 31.5% in 2016 . The 2018 effective income tax rate reflected the reduction to the U.S. federal income tax rate from 35% to 21% resulting from the 2017 Tax Act. It also included income tax expense related to non-deductible litigation accruals and the reconsideration of reserves for state income taxes following the U.S. Supreme Court opinion in South Dakota v. Wayfair, Inc . In addition, we recognized $164 million of income tax expense associated with the final re-measurement of our initial estimates for the impacts of the Tax Act, in accordance with ASC Topic 740, Income Taxes and SEC Accounting Bulletin 118. The 2017 effective income tax rate included an estimated impact of the Tax Act, including a benefit of $3.9 billion resulting from the re-measurement of the Company’s estimated net deferred tax liability as of December 31, 2017 , partially offset by $173 million of income tax expense for the estimated deemed repatriation of the Company’s previously undistributed foreign earnings. The 2017 effective income tax rate also included income tax expense of $1.3 billion related to the effect of discrete non tax-deductible items, predominantly consisting of litigation accruals. The effective income tax rate for 2016 included net reductions in reserves for uncertain tax positions resulting from settlements with tax authorities, partially offset by a net increase in tax benefits related to tax credit investments. Table 23.4 presents the change in unrecognized tax benefits. Table 23.4: Change in Unrecognized Tax Benefits Year ended December 31, (in millions) 2018 2017 Balance at beginning of year $ 5,167 5,029 Additions: For tax positions related to the current year 393 367 For tax positions related to prior years 503 158 Reductions: For tax positions related to prior years (262 ) (319 ) Lapse of statute of limitations (7 ) (48 ) Settlements with tax authorities (44 ) (20 ) Balance at end of year $ 5,750 5,167 Of the $5.8 billion of unrecognized tax benefits at December 31, 2018 , approximately $3.9 billion would, if recognized, affect the effective tax rate. The remaining $1.9 billion of unrecognized tax benefits relates to income tax positions on temporary differences. We recognize interest and penalties related to unrecognized tax benefits as a component of income tax expense. As of December 31, 2018 and 2017 , we have accrued approximately $968 million and $726 million , respectively, for the payment of interest and penalties. In 2018 , we recognized in income tax expense a net tax expense related to interest and penalties of $200 million . In 2017 , we recognized in income tax expense a net tax expense related to interest and penalties of $96 million . We are subject to U.S. federal income tax as well as income tax in numerous state and foreign jurisdictions. We are routinely examined by tax authorities in these various jurisdictions. The IRS is currently examining the 2013 through 2016 consolidated U.S. federal income tax returns of Wells Fargo & Company and its subsidiaries. In addition, we are currently subject to examination by various state, local and foreign taxing authorities. With few exceptions, Wells Fargo and its subsidiaries are not subject to federal, state, local and foreign income tax examinations for taxable years prior to 2007. We are litigating or appealing various issues related to prior IRS examinations for the periods 2003 through 2012. For the 2003 through 2006 periods, we have paid the IRS the contested income tax and interest associated with these issues and refund claims have been filed for the respective years. It is possible that one or more of these examinations, appeals or litigation may be resolved within the next twelve months resulting in a decrease of up to $700 million to our gross unrecognized tax benefits.

Earnings Per Common Share

Earnings Per Common Share	12 Months Ended
	Dec. 31, 2018
Earnings Per Share [Abstract]
Earnings Per Common Share	Note 24: Earnings and Dividends Per Common Share Table 24.1 shows earnings per common share and diluted earnings per common share and reconciles the numerator and denominator of both earnings per common share calculations. See Note 1 (Summary of Significant Accounting Policies) for discussion of private share repurchases, and the Consolidated Statement of Changes in Equity and Note 20 (Common Stock and Stock Plans) for information about stock and options activity and terms and conditions of warrants. Table 24.1: Earnings Per Common Share Calculations Year ended December 31, (in millions, except per share amounts) 2018 2017 2016 Wells Fargo net income $ 22,393 22,183 21,938 Less: Preferred stock dividends and other (1) 1,704 1,629 1,565 Wells Fargo net income applicable to common stock (numerator) $ 20,689 20,554 20,373 Earnings per common share Average common shares outstanding (denominator) 4,799.7 4,964.6 5,052.8 Per share $ 4.31 4.14 4.03 Diluted earnings per common share Average common shares outstanding 4,799.7 4,964.6 5,052.8 Add: Stock options 8.0 17.1 18.9 Restricted share rights 26.3 24.7 25.9 Warrants 4.4 10.9 10.7 Diluted average common shares outstanding (denominator) 4,838.4 5,017.3 5,108.3 Per share $ 4.28 4.10 3.99 (1) The year ended December 31, 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 24.2 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 24.2: Outstanding Anti-Dilutive Options Weighted-average shares Year ended December 31, (in millions) 2018 2017 2016 Options 0.3 1.9 3.2 Table 24.3 presents dividends declared per common share. Table 24.3: Dividends Declared Per Common Share Year ended December 31, 2018 2017 2016 Per common share $ 1.640 1.540 1.515

Other Comprehensive Income

Other Comprehensive Income	12 Months Ended
	Dec. 31, 2018
Cumulative Other Comprehensive Income Balances [Abstract] [Abstract]
Other Comprehensive Income	Note 25: Other Comprehensive Income Table 25.1 provides the components of other comprehensive income (OCI), reclassifications to net income by income statement line item, and the related tax effects. Table 25.1: Summary of Other Comprehensive Income Year ended December 31, 2018 2017 2016 (in millions) 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 $ (4,493 ) 1,100 (3,393 ) 2,719 (1,056 ) 1,663 (3,458 ) 1,302 (2,156 ) Reclassification of net (gains) losses to net income: Interest income on debt securities (2) 357 (88 ) 269 198 (75 ) 123 7 (3 ) 4 Net gains on debt securities (108 ) 27 (81 ) (479 ) 181 (298 ) (942 ) 355 (587 ) Net gains from equity securities (3) — — — (456 ) 172 (284 ) (300 ) 113 (187 ) Other noninterest income (1 ) — (1 ) — — — (5 ) 2 (3 ) Subtotal reclassifications to net income 248 (61 ) 187 (737 ) 278 (459 ) (1,240 ) 467 (773 ) Net change (4,245 ) 1,039 (3,206 ) 1,982 (778 ) 1,204 (4,698 ) 1,769 (2,929 ) Derivatives and hedging activities: Fair Value Hedges: Change in fair value of excluded components on fair value hedges (4) (254 ) 63 (191 ) (253 ) 95 (158 ) — — — Cash Flow Hedges: Net unrealized gains (losses) arising during the period on cash flow hedges (278 ) 67 (211 ) (287 ) 108 (179 ) 177 (67 ) 110 Reclassification of net (gains) losses to net income: Interest income on loans 292 (72 ) 220 (551 ) 208 (343 ) (1,043 ) 393 (650 ) Interest expense on long-term debt 2 — 2 8 (3 ) 5 14 (5 ) 9 Subtotal reclassifications to net income 294 (72 ) 222 (543 ) 205 (338 ) (1,029 ) 388 (641 ) Net change (238 ) 58 (180 ) (1,083 ) 408 (675 ) (852 ) 321 (531 ) Defined benefit plans adjustments: Net actuarial and prior service gains (losses) arising during the period (434 ) 106 (328 ) 49 (12 ) 37 (52 ) (40 ) (92 ) Reclassification of amounts to noninterest expense and employee benefits (5): Amortization of net actuarial loss 127 (31 ) 96 150 (57 ) 93 153 (57 ) 96 Settlements and other 126 (29 ) 97 3 2 5 5 (1 ) 4 Subtotal reclassifications to noninterest expense and employee benefits 253 (60 ) 193 153 (55 ) 98 158 (58 ) 100 Net change (181 ) 46 (135 ) 202 (67 ) 135 106 (98 ) 8 Foreign currency translation adjustments: Net unrealized gains (losses) arising during the period (156 ) 1 (155 ) 96 3 99 (3 ) 4 1 Net change (156 ) 1 (155 ) 96 3 99 (3 ) 4 1 Other comprehensive income (loss) $ (4,820 ) 1,144 (3,676 ) 1,197 (434 ) 763 (5,447 ) 1,996 (3,451 ) Less: Other comprehensive loss from noncontrolling interests, net of tax (2 ) (62 ) (17 ) Wells Fargo other comprehensive income (loss), net of tax $ (3,674 ) 825 (3,434 ) (1) The years ended December 31, 2017 and 2016, include net unrealized gains (losses) arising during the period from equity securities of $81 million and $259 million and reclassification of net (gains) losses to net income related to equity securities of $(456) million and $(300) million , respectively. In connection with our adoption in first quarter 2018 of ASU 2016-01 – Financial Instruments – Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities , the year ended December 31, 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 our adoption of ASU 2016-01 – Financial Instruments – Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities on January 1, 2018, this line will not contain balances as realized and unrealized gains and losses on marketable equity investments will be 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 hedge effectiveness and recorded in other comprehensive income. (5) 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 reclassified to other noninterest expense on the consolidated statement of income. For 2017 and 2016, these balances were reclassified to employee benefits. Table 25.2 provides the cumulative OCI balance activity on an after-tax basis. Table 25.2: Cumulative OCI Balances (in millions) Debt securities (1) Derivatives and hedging activities Defined benefit plans adjustments Foreign currency translation adjustments Cumulative other comprehensive income (loss) Balance, December 31, 2015 $ 1,813 620 (1,951 ) (185 ) 297 Net unrealized gains (losses) arising during the period (2,156 ) 110 (92 ) 1 (2,137 ) Amounts reclassified from accumulated other comprehensive income (773 ) (641 ) 100 — (1,314 ) Net change (2,929 ) (531 ) 8 1 (3,451 ) Less: Other comprehensive loss from noncontrolling interests (17 ) — — — (17 ) Balance, December 31, 2016 (1,099 ) 89 (1,943 ) (184 ) (3,137 ) Transition adjustment (2) — 168 — — 168 Balance, January 1, 2017 (1,099 ) 257 (1,943 ) (184 ) (2,969 ) Net unrealized gains (losses) arising during the period 1,663 (337 ) 37 99 1,462 Amounts reclassified from accumulated other comprehensive income (459 ) (338 ) 98 — (699 ) Net change 1,204 (675 ) 135 99 763 Less: Other comprehensive income (loss) from noncontrolling interests (66 ) — — 4 (62 ) Balance, December 31, 2017 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 (4) 31 (87 ) (353 ) 9 (400 ) Net unrealized losses arising during the period (3,393 ) (402 ) (328 ) (155 ) (4,278 ) Amounts reclassified from accumulated other comprehensive income 187 222 193 — 602 Net change (3,175 ) (267 ) (488 ) (146 ) (4,076 ) Less: Other comprehensive loss from noncontrolling interests — — — (2 ) (2 ) Balance, December 31, 2018 $ (3,122 ) (685 ) (2,296 ) (233 ) (6,336 ) (1) The years ended December 31, 2017 and 2016, include net unrealized gains (losses) arising during the period from equity securities of $81 million and $259 million and reclassification of net (gains) losses to net income related to equity securities of $(456) million and $(300) million , respectively. In connection with our adoption in first quarter 2018 of ASU 2016-01 – Financial Instruments – Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities , the year ended December 31, 2018, reflects net unrealized gains (losses) arising during the period and reclassification of net (gains) losses to net income from only debt securities. (2) Transition adjustment relates to our adoption of ASU 2017-12 – Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities . See Note 1 (Summary of Significant Accounting Policies) for more information. (3) The transition adjustment relates to our 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) Represents the reclassification from other comprehensive income to retained earnings as a result of our adoption of ASU 2018-02 – Income Statement-Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income in third quarter 2018. See Note 1 (Summary of Significant Accounting Policies) for more information.

Operating Segments

Operating Segments	12 Months Ended
	Dec. 31, 2018
Segment Reporting [Abstract]
Operating Segments	Note 26: 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, we adopted a new funds transfer pricing methodology to allow for better comparability of performance across the Company. Under the new methodology, 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 our adoption of ASU 2016-01 in first quarter 2018, certain reclassifications have occurred within noninterest income. Community Banking offers a complete line of diversified financial products and services for consumers and small businesses with annual sales generally up to $5 million in which the owner generally is the financial decision maker. These financial products and services include checking and savings accounts, credit and debit cards, and automobile, student, mortgage, home equity and small business lending, as well as referrals to Wholesale Banking and WIM business partners. Community Banking serves customers through a complete range of channels, including traditional and in-supermarket and other small format branches, ATMs, digital (online, mobile, and social), and contact centers (phone, email and correspondence). The Community Banking segment also includes the results of our Corporate Treasury activities net of allocations (including funds transfer pricing, capital, liquidity and certain corporate expenses) in support of other segments and results of investments in our affiliated venture capital and private equity partnerships. Wholesale Banking provides financial solutions to businesses across the United States with annual sales generally in excess of $5 million and to financial institutions globally. Wholesale Banking provides a complete line of commercial, corporate, capital markets, cash management and real estate banking products and services. These include traditional commercial loans and lines of credit, letters of credit, asset-based lending, equipment leasing, international trade facilities, trade financing, collection services, foreign exchange services, treasury management, merchant payment processing, institutional fixed-income sales, interest rate, commodity and equity risk management, online/electronic products such as the Commercial Electronic Office ® ( CEO ® ) portal, corporate trust fiduciary and agency services, and investment banking services. Wholesale Banking also supports the CRE market with products and services such as construction loans for commercial and residential development, land acquisition and development loans, secured and unsecured lines of credit, interim financing arrangements for completed structures, rehabilitation loans, affordable housing loans and letters of credit, permanent loans for securitization, CRE loan servicing and real estate and mortgage brokerage services. Wealth and Investment Management provides a full range of personalized wealth management, investment and retirement products and services to clients across U.S. based businesses including Wells Fargo Advisors, The Private Bank, Abbot Downing, Wells Fargo Institutional Retirement and Trust, and Wells Fargo Asset Management. We deliver financial planning, private banking, credit, investment management and fiduciary services to high-net worth and ultra-high-net worth individuals and families. We also serve clients’ brokerage needs, supply retirement and trust services to institutional clients and provide investment management capabilities delivered to global institutional clients through separate accounts and the Wells Fargo Funds. Other 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. Table 26.1 presents our results by operating segment. Table 26.1: Operating Segments (income/expense in millions, average balances in billions) Community Banking Wholesale Banking Wealth and Investment Management Other (1) Consolidated Company 2018 Net interest income (2) $ 29,219 18,690 4,441 (2,355 ) 49,995 Provision (reversal of provision) for credit losses 1,783 (58 ) (5 ) 24 1,744 Noninterest income 17,694 10,016 11,935 (3,232 ) 36,413 Noninterest expense 30,491 16,157 12,938 (3,460 ) 56,126 Income (loss) before income tax expense (benefit) 14,639 12,607 3,443 (2,151 ) 28,538 Income tax expense (benefit) 3,784 1,555 861 (538 ) 5,662 Net income (loss) before noncontrolling interests 10,855 11,052 2,582 (1,613 ) 22,876 Less: Net income from noncontrolling interests 461 20 2 — 483 Net income (loss) (3) $ 10,394 11,032 2,580 (1,613 ) 22,393 2017 (4) Net interest income (2) $ 28,658 18,810 4,641 (2,552 ) 49,557 Provision (reversal of provision) for credit losses 2,555 (19 ) (5 ) (3 ) 2,528 Noninterest income 18,360 11,190 12,431 (3,149 ) 38,832 Noninterest expense 32,615 16,624 12,623 (3,378 ) 58,484 Income (loss) before income tax expense (benefit) 11,848 13,395 4,454 (2,320 ) 27,377 Income tax expense (benefit) 634 3,496 1,668 (881 ) 4,917 Net income (loss) before noncontrolling interests 11,214 9,899 2,786 (1,439 ) 22,460 Less: Net income (loss) from noncontrolling interests 276 (15 ) 16 — 277 Net income (loss) (3) $ 10,938 9,914 2,770 (1,439 ) 22,183 2016 (4) Net interest income (2) $ 27,333 18,699 4,249 (2,527 ) 47,754 Provision (reversal of provision) for credit losses 2,691 1,073 (5 ) 11 3,770 Noninterest income 19,180 12,348 12,029 (3,044 ) 40,513 Noninterest expense 27,655 15,901 12,051 (3,230 ) 52,377 Income (loss) before income tax expense (benefit) 16,167 14,073 4,232 (2,352 ) 32,120 Income tax expense (benefit) 5,213 4,159 1,596 (893 ) 10,075 Net income (loss) before noncontrolling interests 10,954 9,914 2,636 (1,459 ) 22,045 Less: Net income (loss) from noncontrolling interests 136 (28 ) (1 ) — 107 Net income (loss) (3) $ 10,818 9,942 2,637 (1,459 ) 21,938 2018 Average loans $ 463.7 465.7 74.6 (58.8 ) 945.2 Average assets 1,034.1 830.5 83.9 (59.6 ) 1,888.9 Average deposits 757.2 423.7 165.0 (70.0 ) 1,275.9 2017 (4) Average loans 475.7 465.6 71.9 (57.1 ) 956.1 Average assets 1,085.5 822.8 82.8 (58.1 ) 1,933.0 Average deposits 729.6 464.2 189.0 (78.2 ) 1,304.6 (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 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. (4) Prior period operating segment results have been revised to reflect a methodology change of allocating funding charges and credits.

Parent-Only Financial Statement

Parent-Only Financial Statements	12 Months Ended
	Dec. 31, 2018
Condensed Financial Information Disclosure [Abstract]
Parent-Only Financial Statements	Note 27: Parent-Only Financial Statements The following tables present Parent-only condensed financial statements. Table 27.1: Parent-Only Statement of Income Year ended December 31, (in millions) 2018 2017 2016 Income Dividends from subsidiaries (1) $ 22,427 20,746 12,776 Interest income from subsidiaries 3,298 1,984 1,615 Other interest income 49 146 155 Other income (424 ) 1,238 177 Total income 25,350 24,114 14,723 Expense Interest expense: Indebtedness to nonbank subsidiaries 644 189 387 Short-term borrowings 2 — — Long-term debt 4,541 3,595 2,619 Other 3 5 19 Noninterest expense 286 1,888 1,300 Total expense 5,476 5,677 4,325 Income before income tax benefit and equity in undistributed income of subsidiaries 19,874 18,437 10,398 Income tax benefit (544 ) (319 ) (1,152 ) Equity in undistributed income of subsidiaries 1,975 3,427 10,388 Net income $ 22,393 22,183 21,938 (1) Includes dividends paid from indirect bank subsidiaries of $20.8 billion , $17.9 billion and $12.5 billion in 2018 , 2017 and 2016 , respectively. Table 27.2: Parent-Only Statement of Comprehensive Income Year ended December 31, (in millions) 2018 2017 2016 Net income $ 22,393 22,183 21,938 Other comprehensive income (loss), net of tax: Debt securities (1) (12 ) 94 (76 ) Derivatives and hedging activities (198 ) (158 ) — Defined benefit plans adjustment (132 ) 118 (20 ) Equity in other comprehensive income (loss) of subsidiaries (3,332 ) 771 (3,338 ) Other comprehensive income (loss), net of tax: (3,674 ) 825 (3,434 ) Total comprehensive income $ 18,719 23,008 18,504 (1) The years ended December 31, 2017 and 2016 , includes net unrealized gains arising during the period from equity securities of $ 3 million and $ 7 million and reclassification of net (gains) to net income related to equity securities of $ (21) million and $ (30) million , respectively. In connection with our adoption in first quarter 2018 of ASU 2016-01 – Financial Instruments – Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities , the year ended December 31, 2018 , reflects net unrealized gains (losses) arising during the period and reclassification of net (gains) losses to net income from only debt securities. Table 27.3: Parent-Only Balance Sheet Dec 31, Dec 31, (in millions) 2018 2017 Assets Cash, cash equivalents, and restricted cash due from (1): Subsidiary banks $ 16,301 23,180 Nonaffiliates — 1 Debt securities: Trading, at fair value (2) — 24 Available-for-sale, at fair value (2) 1 5 Loans to nonbank subsidiaries 139,163 138,681 Investments in subsidiaries (3) 202,695 206,367 Equity securities (2) 2,164 2,414 Other assets (2) 4,639 4,731 Total assets $ 364,963 375,403 Liabilities and equity Accrued expenses and other liabilities $ 6,986 $ 7,902 Long-term debt 135,079 146,130 Indebtedness to nonbank subsidiaries 26,732 14,435 Total liabilities 168,797 168,467 Stockholders’ equity 196,166 206,936 Total liabilities and equity $ 364,963 375,403 (1) Financial information has been revised to reflect the impact of our 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 restricted cash. See Note 1 (Summary of Significant Accounting Policies) for more information. (2) Financial information for the prior period has been revised to reflect presentation changes made in connection with our 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) The years ended December 31, 2018 , and December 31, 2017 , include indirect ownership of bank subsidiaries with equity of $167.6 billion and $170.5 billion , respectively. Table 27.4: Parent-Only Statement of Cash Flows Year ended December 31, (in millions) 2018 2017 2016 Cash flows from operating activities: Net cash provided by operating activities (1) $ 19,024 22,233 10,654 Cash flows from investing activities: Available-for-sale debt securities: Proceeds from sales: Subsidiary banks — 8,658 — Nonaffiliates (1) — 8,824 5,201 Prepayments and maturities: Subsidiary banks — 10,250 15,000 Purchases: Subsidiary banks — (3,900 ) (15,000 ) Nonaffiliates — — (6,544 ) Equity securities, not held for trading: Proceeds from sales and capital returns (1) 355 743 583 Purchases (1) (220 ) (215 ) (314 ) Loans: Net repayments from (advances to) subsidiaries (7 ) (35,876 ) 3,174 Capital notes and term loans made to subsidiaries (2,441 ) (73,729 ) (32,641 ) Principal collected on notes/loans made to subsidiaries 756 69,286 15,164 Net decrease (increase) in investment in subsidiaries 2,407 (2,029 ) (606 ) Other, net 109 113 18 Net cash provided (used) by investing activities 959 (17,875 ) (15,965 ) Cash flows from financing activities: Net increase (decrease) in short-term borrowings and indebtedness to subsidiaries 12,467 (8,685 ) 789 Long-term debt: Proceeds from issuance 1,876 22,217 34,362 Repayment (9,162 ) (13,709 ) (15,096 ) Preferred stock: Proceeds from issuance — 677 2,101 Redeemed (2,150 ) — — Cash dividends paid (1,622 ) (1,629 ) (1,566 ) Common stock: Proceeds from issuance 632 1,211 1,415 Stock tendered for payment of withholding taxes (331 ) (393 ) (494 ) Repurchased (20,633 ) (9,908 ) (8,116 ) Cash dividends paid (7,692 ) (7,480 ) (7,472 ) Other, net (248 ) (138 ) (118 ) Net cash provided (used) by financing activities (26,863 ) (17,837 ) 5,805 Net change in cash, cash equivalents, and restricted cash (2) (6,880 ) (13,479 ) 494 Cash, cash equivalents, and restricted cash at beginning of year (2) 23,181 36,660 36,166 Cash, cash equivalents, and restricted cash at end of year (2) $ 16,301 23,181 36,660 (1) Financial information for the prior period has been revised to reflect presentation changes made in connection with our 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) Financial information has been revised to reflect the impact of our 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 restricted cash. See Note 1 (Summary of Significant Accounting Policies) for more information.

Regulatory and Agency Capital R

Regulatory and Agency Capital Requirements	12 Months Ended
	Dec. 31, 2018
Banking and Thrift [Abstract]
Regulatory and Agency Capital Requirements	Note 28: 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 28.1 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 December 31, 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 28.1: Regulatory Capital Information Wells Fargo & Company Wells Fargo Bank, N.A. December 31, 2018 December 31, 2017 December 31, 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 $ 146,363 146,363 154,765 154,765 142,685 142,685 143,292 143,292 Tier 1 167,866 167,866 178,209 178,209 142,685 142,685 143,292 143,292 Total 198,798 207,041 210,333 220,097 155,558 163,380 156,661 165,734 Assets: Risk-weighted assets $ 1,177,350 1,247,210 1,199,545 1,260,663 1,058,653 1,154,182 1,090,360 1,169,863 Adjusted average assets (1) 1,850,299 1,850,299 1,905,568 1,905,568 1,652,009 1,652,009 1,708,828 1,708,828 Regulatory capital ratios: Common equity tier 1 capital 12.43 % 11.74 * 12.90 12.28 * 13.48 12.36 * 13.14 12.25 * Tier 1 capital 14.26 13.46 * 14.86 14.14 * 13.48 12.36 * 13.14 12.25 * Total capital 16.89 16.60 * 17.53 17.46 * 14.69 14.16 * 14.37 14.17 * Tier 1 leverage (1) 9.07 9.07 9.35 9.35 8.64 8.64 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 28.2 presents the minimum required regulatory capital ratios under Transition Requirements to which the Company and the Bank were subject as of December 31, 2018 , and December 31, 2017 . Table 28.2: Minimum Required Regulatory Capital Ratios – Transition Requirements (1) Wells Fargo & Company Wells Fargo Bank, N.A. December 31, 2018 December 31, 2017 December 31, 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 December 31, 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 December 31, 2018 .

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2018
Significant Accounting Policies [Line Items]
Business Description and Basis of Presentation [Text Block]	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.
Use of Estimates	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 18 (Fair Values of Assets and Liabilities)); • liabilities for contingent litigation losses (Note 16 (Legal Actions)); and • income taxes (Note 23 (Income Taxes)). Actual results could differ from those estimates.
New Accounting Pronouncements, Policy [Policy Text Block]	Accounting Standards Adopted in 2018 In 2018 , we adopted the following new accounting guidance: • Accounting Standards Update (ASU or Update) 2018-14 – Compensation – Retirement Benefits – Defined Benefit Plans—General (Subtopic 715-20): Disclosure Framework – Changes to the Disclosure Requirements for Defined Benefit Plans • ASU 2018-02 – Income Statement-Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income • ASU 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.
Consolidation	Consolidation Our consolidated financial statements include the accounts of the Parent and our subsidiaries in which we have a controlling interest. We are also a variable interest holder in certain entities in which equity investors do not have the characteristics of a controlling financial interest or where the entity does not have enough equity at risk to finance its activities without additional subordinated financial support from other parties (referred to as variable interest entities (VIEs)). Our variable interest arises from contractual, ownership or other monetary interests in the entity, which change with fluctuations in the fair value of the entity’s net assets. We consolidate a VIE if we are the primary beneficiary. We are the primary beneficiary if we have a controlling financial interest, which includes both the power to direct the activities that most significantly impact the VIE and a variable interest that potentially could be significant to the VIE. To determine whether or not a variable interest we hold could potentially be significant to the VIE, we consider both qualitative and quantitative factors regarding the nature, size and form of our involvement with the VIE. We assess whether or not we are the primary beneficiary of a VIE on an ongoing basis. Significant intercompany accounts and transactions are eliminated in consolidation. When we have significant influence over operating and financing decisions for a company but do not own a majority of the voting equity interests, we account for the investment using the equity method of accounting, which requires us to recognize our proportionate share of the company’s earnings. If we do not have significant influence, we account for the equity security under the fair value method, cost method or measurement alternative.
Cash and Due From Banks	Cash, Cash Equivalents and Restricted Cash Cash, cash equivalents and restricted cash include cash on hand, cash items in transit, and amounts due from or held with other depository institutions. See Note 3 (Cash, Loan and Dividend Restrictions) for the nature of our restrictions on cash and cash equivalents.
Securities Purchased and Sold Agreements	Securities Purchased and Sold Agreements Securities purchased under resale agreements and securities sold under repurchase agreements are accounted for as collateralized financing transactions and are recorded at the acquisition or sale price plus accrued interest. We monitor the fair value of securities purchased and sold and obtain collateral from or return it to counterparties when appropriate. These financing transactions do not create material credit risk given the collateral provided and the related monitoring process.
Mortgages and Loans Held for Sale	Mortgage Loans and Loans Held for Sale Mortgage loans held for sale (MLHFS) include commercial and residential mortgages originated for sale and securitization in the secondary market, which is our principal market, or for sale as whole loans. We have elected the fair value option for substantially all residential MLHFS (see Note 18 (Fair Values of Assets and Liabilities)). The remaining residential MLHFS are held at the lower of cost or fair value (LOCOM) and are valued on an aggregate portfolio basis. Commercial MLHFS are held at LOCOM and are valued on an individual loan basis. Loans held for sale (LHFS) includes commercial loans originated for sale in the secondary market and loans used in market-making activities in our trading business. The loans held for trading purposes are carried at fair value, with the remainder of LHFS recorded at LOCOM. Gains and losses on MLHFS are recorded in mortgage banking noninterest income. Gains and losses on LHFS used in trading activities are recognized in net gains from trading activities, with gains and losses on LHFS not used in trading activities recognized in other noninterest income. Direct loan origination costs and fees for MLHFS and LHFS under the fair value option are recognized in income at origination. For MLHFS and LHFS recorded at LOCOM, loan costs and fees are deferred at origination and are recognized in income at time of sale. Interest income on MLHFS and LHFS is calculated based upon the note rate of the loan and is recorded in interest income. Our lines of business are authorized to originate held-for-investment loans that meet or exceed established loan product profitability criteria, including minimum positive net interest margin spreads in excess of funding costs. When a determination is made at the time of commitment to originate loans as held for investment, it is our intent to hold these loans to maturity or for the “foreseeable future,” subject to periodic review under our management evaluation processes, including corporate asset/liability management. In determining the “foreseeable future” for loans, management considers (1) the current economic environment and market conditions, (2) our business strategy and current business plans, (3) the nature and type of the loan receivable, including its expected life, and (4) our current financial condition and liquidity demands. If subsequent changes, including changes in interest rates, significantly impact the ongoing profitability of certain loan products, we may subsequently change our intent to hold these loans, and we would take actions to sell such loans. Upon such management determination, we immediately transfer these loans to the MLHFS or LHFS portfolio at LOCOM.
Loans	Loans Loans are reported at their outstanding principal balances net of any unearned income, cumulative charge-offs, unamortized deferred fees and costs on originated loans and unamortized premiums or discounts on purchased loans. PCI loans are reported net of any remaining purchase accounting adjustments. See the “Purchased Credit-Impaired Loans” section in this Note for our accounting policy for PCI loans. Unearned income, deferred fees and costs, and discounts and premiums are amortized to interest income over the contractual life of the loan using the interest method. Loan commitment fees are generally deferred and amortized into noninterest income on a straight-line basis over the commitment period. We have certain private label and co-brand credit card loans through a program agreement that involves our active participation in the operating activity of the program with a third party. We share in the economic results of the loans subject to this agreement. We consider the program to be a collaborative arrangement and therefore report our share of revenue and losses on a net basis in interest income for loans, other noninterest income and provision for credit losses as applicable. Our net share of revenue from this activity represented less than 1% of our total revenues for 2018 . Loans also include direct financing leases that are recorded at the aggregate of minimum lease payments receivable plus the estimated residual value of the leased property, less unearned income. Leveraged leases, which are a form of direct financing leases, are recorded net of related non-recourse debt. Leasing income is recognized as a constant percentage of outstanding lease financing balances over the lease terms in interest income. NONACCRUAL AND PAST DUE LOANS We generally place loans on nonaccrual status when: • the full and timely collection of interest or principal becomes uncertain (generally based on an assessment of the borrower’s financial condition and the adequacy of collateral, if any), such as in bankruptcy or other circumstances; • they are 90 days ( 120 days with respect to real estate 1-4 family first and junior lien mortgages) past due for interest or principal, unless both well-secured and in the process of collection; • part of the principal balance has been charged off, except for credit card loans, which are generally not placed on nonaccrual status, but are generally fully charged off when the loan reaches 180 days past due; or • for junior lien mortgages, we have evidence that the related first lien mortgage may be 120 days past due or in the process of foreclosure regardless of the junior lien delinquency status. PCI loans are written down at acquisition to fair value using an estimate of cash flows deemed to be collectible and an accretable yield is established. Accordingly, such loans are not classified as nonaccrual because they continue to earn interest from accretable yield, independent of performance in accordance of their contractual terms, and we expect to fully collect the new carrying values of such loans (that is, the new cost basis arising out of purchase accounting). When we place a loan on nonaccrual status, we reverse the accrued unpaid interest receivable against interest income and suspend amortization of any net deferred fees. If the ultimate collectability of the recorded loan balance is in doubt on a nonaccrual loan, the cost recovery method is used and cash collected is applied to first reduce the carrying value of the loan. Otherwise, interest income may be recognized to the extent cash is received. Generally, we return a loan to accrual status when all delinquent interest and principal become current under the terms of the loan agreement and collectability of remaining principal and interest is no longer doubtful. We typically re-underwrite modified loans at the time of a restructuring to determine if there is sufficient evidence of sustained repayment capacity based on the borrower’s financial strength, including documented income, debt to income ratios and other factors. If the borrower has demonstrated performance under the previous terms and the underwriting process shows the capacity to continue to perform under the restructured terms, the loan will generally remain in accruing status. When a loan classified as a troubled debt restructuring (TDR) performs in accordance with its modified terms, the loan either continues to accrue interest (for performing loans) or will return to accrual status after the borrower demonstrates a sustained period of performance (generally six consecutive months of payments, or equivalent, inclusive of consecutive payments made prior to the modification). Loans will be placed on nonaccrual status and a corresponding charge-off is recorded if we believe it is probable that principal and interest contractually due under the modified terms of the agreement will not be collectible. Our loans are considered past due when contractually required principal or interest payments have not been made on the due dates. LOAN CHARGE-OFF POLICIES For commercial loans, we generally fully charge off or charge down to net realizable value (fair value of collateral, less estimated costs to sell) for loans secured by collateral when: • management judges the loan to be uncollectible; • repayment is deemed to be protracted beyond reasonable time frames; • the loan has been classified as a loss by either our internal loan review process or our banking regulatory agencies; • the customer has filed bankruptcy and the loss becomes evident owing to a lack of assets; or • the loan is 180 days past due unless both well-secured and in the process of collection. For consumer loans, we fully charge off or charge down to net realizable value when deemed uncollectible due to bankruptcy or other factors, or no later than reaching a defined number of days past due, as follows: • 1-4 family first and junior lien mortgages – We generally charge down to net realizable value when the loan is 180 days past due. • Automobile loans – We generally fully charge off when the loan is 120 days past due. • Credit card loans – We generally fully charge off when the loan is 180 days past due. • Unsecured loans (closed end) – We generally fully charge off when the loan is 120 days past due. • Unsecured loans (open end) – We generally fully charge off when the loan is 180 days past due. • Other secured loans – We generally fully or partially charge down to net realizable value when the loan is 120 days past due. IMPAIRED LOANS We consider a loan to be impaired when, based on current information and events, we determine that we will not be able to collect all amounts due according to the loan contract, including scheduled interest payments. This evaluation is generally based on delinquency information, an assessment of the borrower’s financial condition and the adequacy of collateral, if any. 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. When we identify a loan as impaired, we generally measure the impairment, if any, based on the difference between the recorded investment in the loan (net of previous charge-offs, deferred loan fees or costs and unamortized premium or discount) and the present value of expected future cash flows, discounted at the loan’s effective interest rate. When the value of an impaired loan is calculated by discounting expected cash flows, interest income is recognized using the loan’s effective interest rate over the remaining life of the loan. When collateral is the sole source of repayment for the impaired loan, rather than the borrower’s income or other sources of repayment, we charge down to net realizable value. TROUBLED DEBT RESTRUCTURINGS In situations where, 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 the borrower that we would not otherwise consider, the related loan is classified as a TDR. These modified terms may include rate reductions, principal forgiveness, term extensions, payment forbearance and other actions intended to minimize our economic loss and to avoid foreclosure or repossession of the collateral, if applicable. For modifications where we forgive principal, the entire amount of such principal forgiveness is immediately charged off. Loans classified as TDRs, including loans in trial payment periods (trial modifications), are considered impaired loans. Other than resolutions such as foreclosures, sales and transfers to held-for-sale, we may remove loans held for investment from TDR classification, but only if they have been refinanced or restructured at market terms and qualify as a new loan. PURCHASED CREDIT-IMPAIRED LOANS Loans acquired with evidence of credit deterioration since their origination and where it is probable that we will not collect all contractually required principal and interest payments are PCI loans. PCI loans are recorded at fair value at the date of acquisition, and the historical allowance for credit losses related to these loans is not carried over. Fair value at date of acquisition is generally determined using a discounted cash flow method and any excess cash flow expected to be collected over the carrying value (estimated fair value at acquisition date) is referred to as the accretable yield and is recognized in interest income using an effective yield method over the remaining life of the loan, or pool of loans if aggregated based on common risk characteristics. The difference between contractually required payments and the cash flows expected to be collected at acquisition, considering the impact of prepayments, is referred to as the nonaccretable difference. Based on quarterly evaluations of remaining cash flows expected to be collected, expected decreases may result in recording a provision for loss and expected increases may result in a prospective yield adjustment after first reversing any allowance for losses related to the loan, or pool of loans. Resolutions of loans may include sales of loans to third parties, receipt of payments in settlement with the borrower, or foreclosure of the collateral. For individual PCI loans, gains or losses on sales to third parties are included in other noninterest income, and gains or losses as a result of a settlement with the borrower are included in interest income. Our policy is to remove an individual loan from a pool based on comparing the amount received from its resolution with its contractual amount. Any difference between these amounts is absorbed by the nonaccretable difference for the entire pool, which assumes that the amount received from resolution approximates pool performance expectations. Any material change in remaining effective yield caused by this removal method is addressed by our quarterly cash flow evaluation process for each pool. We may also sell groups of loans from a pool and include any gains or losses on sales to third parties in other noninterest income. Any difference between the amount received from the buyer and the contractual amount due from the customer is absorbed by the nonaccretable difference for the entire pool. We maintain the effective yield for the remaining loans in the pool consistent with the yield immediately prior to the sale. Modified PCI loans are not removed from a pool even if those loans would otherwise be deemed TDRs. Modified PCI loans that are accounted for individually are considered TDRs and removed from PCI accounting if there has been a concession granted in excess of the original nonaccretable difference. We include these TDRs in our impaired loans. FORECLOSED ASSETS Foreclosed assets obtained through our lending activities primarily include real estate. Generally, loans have been written down to their net realizable value prior to foreclosure. Any further reduction to their net realizable value is recorded with a charge to the allowance for credit losses at foreclosure. We allow up to 90 days after foreclosure to finalize determination of net realizable value. Thereafter, changes in net realizable value are recorded to noninterest expense. The net realizable value of these assets is reviewed and updated periodically depending on the type of property. Certain government-guaranteed mortgage loans upon foreclosure are included in accounts receivable, not foreclosed assets. These receivables were loans predominantly insured by the FHA or guaranteed by the VA and are measured based on the balance expected to be recovered from the FHA or VA. ALLOWANCE FOR CREDIT LOSSES (ACL) The allowance for credit losses is management’s estimate of credit losses inherent in the loan portfolio, including unfunded credit commitments, at the balance sheet date. We have an established process to determine the appropriateness of the allowance for credit losses that assesses the losses inherent in our portfolio and related unfunded credit commitments. We develop and document our allowance methodology at the portfolio segment level – commercial loan portfolio and consumer loan portfolio. While we attribute portions of the allowance to our respective commercial and consumer portfolio segments, the entire allowance is available to absorb credit losses inherent in the total loan portfolio and unfunded credit commitments. Our process involves procedures to appropriately consider the unique risk characteristics of our commercial and consumer loan portfolio segments. For each portfolio segment, losses are estimated collectively for groups of loans with similar characteristics, individually or pooled for impaired loans or, for PCI loans, based on the changes in cash flows expected to be collected. Our allowance levels are influenced by loan volumes, loan grade migration or delinquency status, historic loss experience and other conditions influencing loss expectations, such as economic conditions. COMMERCIAL PORTFOLIO SEGMENT ACL METHODOLOGY Generally, commercial loans are assessed for estimated losses by grading each loan using various risk factors as identified through periodic reviews. Our estimation approach for the commercial portfolio reflects the estimated probability of default in accordance with the borrower’s financial strength and the severity of loss in the event of default, considering the quality of any underlying collateral. Probability of default and severity at the time of default are statistically derived through historical observations of default and losses after default within each credit risk rating. These estimates are adjusted as appropriate based on additional analysis of long-term average loss experience compared to previously forecasted losses, external loss data or other risks identified from current economic conditions and credit quality trends. The estimated probability of default and severity at the time of default are applied to loan equivalent exposures to estimate losses for unfunded credit commitments. The allowance also includes an amount for the estimated impairment on nonaccrual commercial loans and commercial loans modified in a TDR, whether on accrual or nonaccrual status. CONSUMER PORTFOLIO SEGMENT ACL METHODOLOGY For consumer loans that are not identified as a TDR, we generally determine the allowance on a collective basis utilizing forecasted losses to represent our best estimate of inherent loss. We pool loans, generally by product types with similar risk characteristics, such as residential real estate mortgages and credit cards. As appropriate and to achieve greater accuracy, we may further stratify selected portfolios by sub-product, origination channel, vintage, loss type, geographic location and other predictive characteristics. Models designed for each pool are utilized to develop the loss estimates. We use assumptions for these pools in our forecast models, such as historic delinquency and default, loss severity, home price trends, unemployment trends, and other key economic variables that may influence the frequency and severity of losses in the pool. In determining the appropriate allowance attributable to our residential mortgage portfolio, we take into consideration portfolios determined to be at elevated risk, such as junior lien mortgages behind delinquent first lien mortgages and junior lien lines of credit subject to near term significant payment increases. We incorporate the default rates and severity of loss for these higher risk portfolios, including the impact of our established loan modification programs. Accordingly, the loss content associated with the effects of loan modifications and higher risk portfolios has been captured in our ACL methodology. We separately estimate impairment for consumer loans that have been modified in a TDR (including trial modifications), whether on accrual or nonaccrual status. OTHER ACL MATTERS The allowance for credit losses for both portfolio segments includes an amount for imprecision or uncertainty that may change from period to period. This amount represents management’s judgment of risks inherent in the processes and assumptions used in establishing the allowance. This imprecision considers economic environmental factors, modeling assumptions and performance, process risk, and other subjective factors, including industry trends and emerging risk assessments.
Securitizations and Beneficial Interests	Securitizations and Beneficial Interests In certain asset securitization transactions that meet the applicable criteria to be accounted for as a sale, assets are sold to an entity referred to as a Special Purpose Entity (SPE), which then issues beneficial interests in the form of senior and subordinated interests collateralized by the assets. In some cases, we may retain beneficial interests issued by the entity. Additionally, from time to time, we may also re-securitize certain assets in a new securitization transaction. The assets and liabilities transferred to an SPE are excluded from our consolidated balance sheet if the transfer qualifies as a sale and we are not required to consolidate the SPE. For transfers of financial assets recorded as sales, we recognize and initially measure at fair value all assets obtained (including beneficial interests) and liabilities incurred. We record a gain or loss in noninterest income for the difference between the carrying amount and the fair value of the assets sold. Fair values are based on quoted market prices, quoted market prices for similar assets, or if market prices are not available, then the fair value is estimated using discounted cash flow analyses with assumptions for credit losses, prepayments and discount rates that are corroborated by and verified against market observable data, where possible. Interests retained from and liabilities incurred in securitizations with off-balance sheet entities i nclude debt and equity securities , loans, MSRs, derivative assets and liabilities, other assets, other liabilities, such as liabilities for mortgage repurchase losses or long-term debt and are accounted for as described within this Note.
Mortgage Servicing Rights	Mortgage Servicing Rights (MSRs) We recognize the rights to service mortgage loans for others, or MSRs, as assets whether we purchase the MSRs or the MSRs result from a sale or securitization of loans we originate (asset transfers). We initially record all of our MSRs at fair value. Subsequently, residential loan MSRs are carried at fair value. All of our MSRs related to our commercial mortgage loans are subsequently measured at LOCOM. The valuation and sensitivity of MSRs is discussed further in Note 9 (Securitizations and Variable Interest Entities), Note 10 (Mortgage Banking Activities) and Note 18 (Fair Values of Assets and Liabilities). For MSRs carried at fair value, changes in fair value are reported in mortgage banking noninterest income in the period in which the change occurs. MSRs subsequently measured at LOCOM are amortized in proportion to, and over the period of, estimated net servicing income. The amortization of MSRs is reported in mortgage banking noninterest income, analyzed monthly and adjusted to reflect changes in prepayment speeds, as well as other factors. MSRs accounted for at LOCOM are periodically evaluated for impairment based on the fair value of those assets. For purposes of impairment evaluation and measurement, we stratify MSRs based on the predominant risk characteristics of the underlying loans, including investor and product type. If, by individual stratum, the carrying amount of these MSRs exceeds fair value, a valuation allowance is established. The valuation allowance is adjusted as the fair value changes.
Premises and Equipment	Premises and Equipment Premises and equipment are carried at cost less accumulated depreciation and amortization. Capital leases, where we are the lessee, are included in premises and equipment at the capitalized amount less accumulated amortization. We primarily use the straight-line method of depreciation and amortization. Estimated useful lives range up to 40 years for buildings, up to 10 years for furniture and equipment, and the shorter of the estimated useful life (up to 8 years ) or the lease term for leasehold improvements. We amortize capitalized leased assets on a straight-line basis over the lives of the respective leases.
Goodwill and Identifiable Intangible Assets	Goodwill and Identifiable Intangible Assets Goodwill is recorded in business combinations under the purchase method of accounting when the purchase price is higher than the fair value of net assets, including identifiable intangible assets. We assess goodwill for impairment at a reporting unit level on an annual basis or more frequently in certain circumstances. We have determined that our reporting units are one level below the operating segments and distinguish these reporting units based on how the segments and reporting units are managed, taking into consideration the economic characteristics, nature of the products, and customers of the segments and reporting units. At the time we acquire a business, we allocate goodwill to applicable reporting units based on their relative fair value, and if we have a significant business reorganization, we may reallocate the goodwill. If we sell a business, a portion of goodwill is included with the carrying amount of the divested business. We have the option of performing a qualitative assessment of goodwill. We may also elect to bypass the qualitative test and proceed directly to a quantitative test. If we perform a qualitative assessment of goodwill to test for impairment and conclude it is more likely than not that a reporting unit’s fair value is greater than its carrying amount, quantitative tests are not required. However, if we determine it is more likely than not that a reporting unit’s fair value is less than its carrying amount, then we complete a quantitative assessment to determine if there is goodwill impairment. We apply various quantitative valuation methodologies, including discounted cash flow and earnings multiple approaches, to determine the estimated fair value, which is compared to the carrying value of each reporting unit. If the fair value is less than the carrying amount, an additional test is required to measure the amount of impairment. We recognize impairment losses as a charge to other noninterest expense (unless related to discontinued operations) and an adjustment to the carrying value of the goodwill asset. Subsequent reversals of goodwill impairment are prohibited. We amortize core deposit and other customer relationship intangibles on an accelerated basis over useful lives not exceeding 10 years. We review such intangibles for impairment whenever events or changes in circumstances indicate that their carrying amounts may not be recoverable. Impairment is indicated if the sum of undiscounted estimated future net cash flows is less than the carrying value of the asset. Impairment is permanently recognized by writing down the asset to the extent that the carrying value exceeds the estimated fair value.
Derivatives and Hedging Activities	Derivatives and Hedging Activities DERIVATIVES We recognize all derivatives on the balance sheet at fair value. On the date we enter into a derivative contract, we designate the derivative as (1) qualifying for hedge accounting in a hedge of the fair value of a recognized asset or liability or an unrecognized firm commitment, including hedges of foreign currency exposure (“fair value hedge”), (2) qualifying for hedge accounting in a hedge of a forecasted transaction or of the variability of cash flows to be received or paid related to a recognized asset or liability (“cash flow hedge”), or (3) held for customer accommodation trading or asset/liability risk management or other purposes, including economic hedges not qualifying for hedge accounting. For derivatives not designated as a fair value or cash flow hedge, we report changes in the fair values in current period noninterest income. For additional information on derivative assets and liabilities used in our trading business, see Note 4 (Trading Activities). DOCUMENTATION AND EFFECTIVENESS ASSESSMENT FOR ACCOUNTING HEDGES For fair value and cash flow hedges qualifying for hedge accounting, we formally document at inception the relationship between hedging instruments and hedged items, our risk management objective, strategy and our evaluation of effectiveness for our hedge transactions. This process includes linking all derivatives designated as fair value or cash flow hedges to specific assets and liabilities on the balance sheet or to specific forecasted transactions. We assess hedge effectiveness using regression analysis, both at inception of the hedging relationship and on an ongoing basis. For fair value hedges, the regression analysis involves regressing the periodic change in fair value of the hedging instrument against the periodic changes in fair value of the asset or liability being hedged due to changes in the hedged risk(s). For cash flow hedges, the regression analysis involves regressing the periodic changes in fair value of the hedging instrument against the periodic changes in fair value of the hypothetical derivative. The hypothetical derivative has terms that identically match and offset the cash flows of the forecasted transaction being hedged due to changes in the hedged risk(s). The initial assessment for fair value and cash flow hedges includes an evaluation of the quantitative measures of the regression results used to validate the conclusion of high effectiveness. Periodically, as required, we also formally assess whether the derivative we designated in each hedging relationship is expected to be and has been highly effective in offsetting changes in fair values or cash flows of the hedged item using the regression analysis method. FAIR VALUE HEDGES For a fair value hedge, we record changes in the fair value of the derivative in current period income, except for certain derivatives in which a portion is recorded to OCI. We record basis adjustments to the amortized cost of the hedged asset or liability due to the changes in fair value related to the hedged risk with the offset recorded in current period net income. We present derivative gains or losses in the same income statement category as the hedged asset or liability, as follows: • For fair value hedges of interest rate risk, amounts are reflected in net interest income; • For hedges of foreign currency risk, amounts representing the fair value changes less the accrual for periodic cash flow settlements are reflected in noninterest income. The periodic cash flow settlements are reflected in net interest income; • For hedges of both interest rate risk and foreign currency risk, amounts representing the fair value change less the accrual for periodic cash flow settlements is attributed to both net interest income and noninterest income. The periodic cash flow settlements are reflected in net interest income. The entire derivative gain or loss is included in the assessment of hedge effectiveness for all fair value hedge relationships, except for hedges of foreign-currency denominated available-for-sale debt securities and long-term debt liabilities, as follows: • When hedged with cross-currency swaps, the change in fair value of the derivative attributable to cross-currency basis spread changes component is excluded from the assessment of hedge effectiveness. The initial fair value of the excluded component is amortized to net interest income. For these hedges, the difference between changes in fair value of the excluded component and the amount recorded in earnings is recorded in OCI; • When hedged with foreign currency forward derivatives, the change in fair value of the derivative attributable to the time value component related to the changes in the difference between the spot and forward price is excluded from the assessment of hedge effectiveness. For these hedges, the changes in fair value of the excluded component are recorded in net interest income. CASH FLOW HEDGES For a cash flow hedge, we record changes in the fair value of the derivative in OCI. We subsequently reclassify gains and losses from these changes in fair value from OCI to net income in the same period(s) that the hedged transaction affects net income and in the same income statement category as the hedged item, thus to net interest income. The entire gain or loss on these derivatives is included in the assessment of hedge effectiveness. DISCONTINUING HEDGE ACCOUNTING We discontinue hedge accounting prospectively when (1) a derivative is no longer highly effective in offsetting changes in the fair value or cash flows of a hedged item, (2) a derivative expires or is sold, terminated or exercised, (3) we elect to discontinue the designation of a derivative as a hedge, or (4) in a cash flow hedge, a derivative is de-designated because it is no longer probable that a forecasted transaction will occur. When we discontinue fair value hedge accounting, we no longer adjust the previously hedged asset or liability for changes in fair value, and remaining cumulative adjustments to the hedged item and accumulated amounts reported in OCI are accounted for in the same manner as other components of the carrying amount of the asset or liability. If the hedged item is derecognized, the accumulated amounts reported in OCI are immediately reclassified to net income . If the derivative continues to be held after fair value hedge accounting ceases, we carry the derivative on the balance sheet at its fair value with changes in fair value included in noninterest income. When we discontinue cash flow hedge accounting and it is probable that the forecasted transaction will occur, the accumulated amount reported in OCI at the de-designation date continues to be reported in OCI until the forecasted transaction affects net income at which point the related OCI amount is reclassified to net income. If cash flow hedge accounting is discontinued and it is probable the forecasted transaction will no longer occur, the accumulated gains and losses reported in OCI at the de-designation date is immediately reclassified to net income. If the derivative continues to be held after cash flow hedge accounting ceases, we carry the derivative on the balance sheet at its fair value with changes in fair value included in noninterest income. EMBEDDED DERIVATIVES We may purchase or originate financial instruments that contain an embedded derivative. At inception of the financial instrument, we assess (1) if the economic characteristics of the embedded derivative are not clearly and closely related to the economic characteristics of the financial instrument (host contract), (2) if the financial instrument that embodies both the embedded derivative and the host contract is not measured at fair value with changes in fair value reported in net income, and (3) if a separate instrument with the same terms as the embedded instrument would meet the definition of a derivative. If the embedded derivative meets all of these conditions, we separate it from the host contract by recording the bifurcated derivative at fair value and the remaining host contract at the difference between the basis of the hybrid instrument and the fair value of the bifurcated derivative. The bifurcated derivative is carried at fair value with changes recorded in current period noninterest income. COUNTERPARTY CREDIT RISK AND NETTING By using derivatives, we are exposed to counterparty credit risk, which is the risk that counterparties to the derivative contracts do not perform as expected. If a counterparty fails to perform, our counterparty credit risk is equal to the amount reported as a derivative asset on our balance sheet. The amounts reported as a derivative asset are derivative contracts in a gain position, and to the extent subject to legally enforceable master netting arrangements, net of derivatives in a loss position with the same counterparty and cash collateral received. We minimize counterparty credit risk through credit approvals, limits, monitoring procedures, executing master netting arrangements and obtaining collateral, where appropriate. Counterparty credit risk related to derivatives is considered in determining fair value and our assessment of hedge effectiveness. To the extent derivatives subject to master netting arrangements meet the applicable requirements, including determining the legal enforceability of the arrangement, it is our policy to present derivative balances and related cash collateral amounts net on the balance sheet. In the second quarter of 2017, we adopted Settlement to Market treatment for the cash collateralizing our interest rate derivative contracts with certain centrally cleared counterparties. As a result of this adoption, derivative balances with these counterparties are considered settled by the collateral. For additional information on our derivatives and hedging activities, see Note 17 (Derivatives).
Operating Lease Assets	Operating Lease Assets Operating lease rental income for leased assets is recognized in other income on a straight-line basis over the lease term. Related depreciation expense is recorded on a straight-line basis over the estimated useful life, considering the estimated residual value of the leased asset. The useful life may be adjusted to the term of the lease depending on our plans for the asset after the lease term. On a periodic basis, leased assets are reviewed for impairment. Impairment loss is recognized if the carrying amount of leased assets exceeds fair value and is not recoverable. The carrying amount of leased assets is not recoverable if it exceeds the sum of the undiscounted cash flows expected to result from the lease payments and the estimated residual value upon the eventual disposition of the equipment.
Pension Accounting	Pension Accounting We account for our defined benefit pension plans using an actuarial model. Two principal assumptions in determining net periodic pension cost are the discount rate and the expected long-term rate of return on plan assets. A discount rate is used to estimate the present value of our future pension benefit obligations. We use a consistent methodology to determine the discount rate using a yield curve with maturity dates that closely match the estimated timing of the expected benefit payments for our plans. The yield curve is derived from a broad-based universe of high quality corporate bonds as of the measurement date. Our determination of the reasonableness of our expected long-term rate of return on plan assets is highly quantitative by nature. We evaluate the current asset allocations and expected returns under two sets of conditions: (1) projected returns using several forward-looking capital market assumptions, and (2) historical returns for the main asset classes dating back to 1970 or the earliest period for which historical data was readily available for the asset classes included. Using long-term historical data allows us to capture multiple economic environments, which we believe is relevant when using historical returns. We place greater emphasis on the forward-looking return and risk assumptions than on historical results. We use the resulting projections to derive a base line expected rate of return and risk level for the Cash Balance Plan’s prescribed asset mix. We evaluate the portfolio based on: (1) the established target asset allocations over short term ( one -year) and longer term ( ten -year) investment horizons, and (2) the range of potential outcomes over these horizons within specific standard deviations. We perform the above analyses to assess the reasonableness of our expected long-term rate of return on plan assets. We consider the expected rate of return to be a long-term average view of expected returns. At year end, we re-measure our defined benefit plan liabilities and related plan assets and recognize any resulting actuarial gain or loss in other comprehensive income. We generally amortize net actuarial gain or loss in excess of a 5% corridor from accumulated OCI into net periodic pension cost over the estimated average remaining participation period, which at December 31, 2018 , is 19 years . See Note 22 (Employee Benefits and Other Expenses) for additional information on our pension accounting.
Income Taxes	Income Taxes We file consolidated and separate company U.S. federal income tax returns, foreign tax returns and various combined and separate company state tax returns. We evaluate two components of income tax expense: current and deferred income tax expense. Current income tax expense represents our estimated taxes to be paid or refunded for the current period and includes income tax expense related to our uncertain tax positions. Deferred income tax expense results from changes in deferred tax assets and liabilities between periods. We determine deferred income taxes using the balance sheet method. Under this method, the net deferred tax asset or liability is based on the tax effects of the differences between the book and tax bases of assets and liabilities, and recognizes enacted changes in tax rates and laws in the period in which they occur. Deferred tax assets are recognized subject to management’s judgment that realization is “more likely than not.” Uncertain tax positions that meet the more likely than not recognition threshold are measured to determine the amount of benefit to recognize. An uncertain tax position is measured at the largest amount of benefit that management believes has a greater than 50% likelihood of realization upon settlement. Tax benefits not meeting our realization criteria represent unrecognized tax benefits. We account for interest and penalties as a component of income tax expense. In 2018, we finalized the recognition of the U.S. tax expense associated with a deemed repatriation of undistributed earnings of certain non-U.S. subsidiaries as required under the 2017 Tax Act. We do not intend to distribute these earnings in a taxable manner, and therefore intend to limit distributions to foreign earnings previously taxed in the U.S., that would qualify for the 100% dividends received deduction, and that would not result in any significant state or foreign taxes. All other undistributed foreign earnings will continue to be permanently reinvested outside the U.S. See Note 23 (Income Taxes) to Financial Statements in this Report for a further description of our provision for income taxes and related income tax assets and liabilities.
Stock-Based Compensation	Stock-Based Compensation We have stock-based employee compensation plans as more fully discussed in Note 20 (Common Stock and Stock Plans). Our Long-Term Incentive Compensation Plan provides for awards of incentive and nonqualified stock options, stock appreciation rights, restricted shares, restricted share rights (RSRs), performance share awards (PSAs) and stock awards without restrictions. For most awards, we measure the cost of employee services received in exchange for an award of equity instruments, such as stock options, RSRs or PSAs, based on the fair value of the award on the grant date. The cost is normally recognized in our income statement over the vesting period of the award; awards with graded vesting are expensed on a straight-line method. Awards that continue to vest after retirement are expensed over the shorter of the period of time between the grant date and the final vesting period or between the grant date and when a team member becomes retirement eligible; awards to team members who are retirement eligible at the grant date are subject to immediate expensing upon grant. Beginning in 2013, certain RSRs and all PSAs granted include discretionary conditions that can result in forfeiture and are subject to variable accounting. For these awards, the associated compensation expense fluctuates with changes in our stock price. For PSAs, compensation expense also fluctuates based on the estimated outcome of meeting the performance conditions.
Earnings Per Common Share	Earnings Per Common Share We compute earnings per common share by dividing net income (after deducting dividends on preferred stock) by the average number of common shares outstanding during the year. We compute diluted earnings per common share by dividing net income (after deducting dividends on preferred stock) by the average number of common shares outstanding during the year plus the effect of common stock equivalents (for example, stock options, restricted share rights, convertible debentures and warrants) that are dilutive.
Fair Value of Financial Instruments	Fair Value of Financial Instruments We use fair value measurements in our fair value disclosures and to record certain assets and liabilities at fair value on a recurring basis, such as instruments used in our trading activities, or on a nonrecurring basis, such as measuring impairment on assets carried at amortized cost. We base our fair values on 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 measurement date. These fair value measurements are based on the exit price notion and are determined by maximizing the use of observable inputs. However, for certain instruments, we must utilize unobservable inputs in determining fair value due to the lack of observable inputs in the market, which requires greater judgment in the measurement of fair value. In instances where there is limited or no observable market data for the asset or liability, fair value measurements are based on internal models, third-party vendor pricing, broker pricing or a combination of these sources. The valuation models utilize external market information and vendor or broker pricing where available, and consider the economic and competitive environment, the characteristics of the asset or liability, recent prices for products we offer or issue, and other relevant internal and external factors. As with any valuation technique used to estimate fair value, changes in underlying assumptions used, including discount rates and estimates of future cash flows, could significantly affect the results of current or future values. Accordingly, these fair value estimates may not be realized in an actual sale or immediate settlement of the asset or liability. Our fair value measurements are adjusted, where necessary, to incorporate the lack of market liquidity. Fair value measurements based on vendor or broker prices may reflect exit prices that inherently consider the lack of market liquidity. When the impact of illiquid markets has not already been incorporated in the fair value measurement, we adjust the vendor or broker price using internal models based on discounted cash flows. For certain residential MLHFS and certain securities where the significant inputs have become unobservable due to illiquid markets and vendor or broker pricing is not used, our discounted cash flow model uses a discount rate that reflects what we believe a market participant would require in light of the illiquid market. Where markets are inactive and transactions are not orderly, transaction or quoted prices for assets or liabilities in inactive markets may require adjustment due to the uncertainty of whether the underlying transactions are orderly. For items that use price quotes in inactive markets, we analyze the degree of market inactivity and distressed transactions to determine the appropriate adjustment to the price quotes. We continually assess the level and volume of market activity in our debt and equity security classes in determining adjustments, if any, to price quotes. Given market conditions can change over time, our determination of which securities markets are considered active or inactive can change. If we determine a market to be inactive, the degree to which price quotes require adjustment, can also change. See Note 18 (Fair Values of Assets and Liabilities) for discussion of the fair value hierarchy and valuation methodologies applied to financial instruments to determine fair value.
Private Share Repurchases	Private Share Repurchases During 2018 and 2017 , we repurchased approximately 94 million shares and approximately 89 million shares of our common stock, respectively, under private forward repurchase contracts and a written repurchase plan pursuant to Rule 10b5-1 of the Securities Exchange Act of 1934 that we executed in fourth quarter 2018. We enter into these stock repurchase transactions to complement our open-market common stock repurchase strategies, to allow us to manage our share repurchases in a manner consistent with our capital plans, currently submitted under the Comprehensive Capital Analysis and Review (CCAR), and to provide an economic benefit to the Company. Our payments to the counterparties for the private forward repurchase 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 contemplated a fixed dollar amount available per quarter for share repurchases pursuant to Federal Reserve Board (FRB) supervisory guidance. In return, the counterparty agrees to deliver a variable number of shares based on a per share discount to the volume-weighted average stock price over the contract period. There are no scenarios where the contracts would not either physically settle in shares or allow us to choose the settlement method. Our total number of outstanding shares of common stock is not reduced until settlement of the private forward repurchase contract. We had no unsettled private forward repurchase contracts at December 31, 2018 , or December 31, 2017 . Under the Rule 10b5-1 repurchase plan, payments and receipt of repurchased shares settle on the same day and the shares repurchased reduce the total number of outstanding shares of common stock upon the settlement of each trade under the plan.
Subsequent Events	SUBSEQUENT EVENTS We have evaluated the effects of events that have occurred subsequent to December 31, 2018 , and there have been no material events that would require recognition in our 2018 consolidated financial statements or disclosure in the Notes to the consolidated financial statements. On February 7, 2019, we experienced system issues caused by an automatic power shutdown at one of our main data center facilities. This power shutdown was triggered by a smoke alarm that resulted from a steam condition created by routine maintenance activities in the building. Although applications and related workloads were systematically re-routed to back-up data centers throughout the day, certain of our services experienced disruptions that delayed service to our customers. As an example, our online and mobile banking systems and certain ATM functions experienced disruptions for several hours, and certain critical mortgage origination systems experienced disruptions for several days. We are currently assessing these system issues and expect that the Company will incur costs associated with system enhancements that may be necessary to improve the speed of re-routing applications and related workloads to back-up data centers, help ensure that applications are fully operational to the extent an incident occurs, and reduce the likelihood of similar issues occurring in the future.
Available-for-Sale Debt Securities [Member]
Significant Accounting Policies [Line Items]
Marketable and Nonmarketable Securities, Policy [Policy Text Block]	AVAILABLE-FOR-SALE DEBT SECURITIES Debt securities for which the Company does not have the postitive intent and ability to hold to maturity are classified as AFS. These AFS debt securities are reported at fair value with unrealized gains and losses, net of applicable income taxes, reported in cumulative OCI. We conduct other-than-temporary impairment (OTTI) analysis on a quarterly basis or more often if a potential loss-triggering event occurs. The initial indicator of OTTI is a decline in fair value below the amortized cost of the debt security. An AFS debt security that has a decline in the fair value below the security’s amortized cost records OTTI if we (1) have the intent to sell the security, (2) it is more likely than not that we will be required to sell the security before recovery of its amortized cost basis, or (3) we do not expect to recover the entire amortized cost basis of the security. Estimating recovery of the amortized cost basis of an AFS debt security is based upon an assessment of the cash flows expected to be collected. If the present value of cash flows expected to be collected, discounted at the security’s effective yield, is less than amortized cost, OTTI is considered to have occurred. In performing an assessment of the cash flows expected to be collected, we consider all relevant information including: • the length of time and the extent to which the fair value has been less than the amortized cost basis; • the historical and implied volatility of the fair value of the security; • the cause of the price decline, such as the general level of interest rates or adverse conditions specifically related to the security, an industry or a geographic area; • the issuer’s financial condition, near-term prospects and ability to service the debt; • the payment structure of the debt security and the likelihood of the issuer being able to make payments that increase in the future; • for asset-backed securities, the credit performance of the underlying collateral, including delinquency rates, level of non-performing assets, cumulative losses to date, collateral value and the remaining credit enhancement compared with expected credit losses; • any change in rating agencies’ credit ratings at evaluation date from acquisition date and any likely imminent action; • independent analyst reports and forecasts, sector credit ratings and other independent market data; and • recoveries or additional declines in fair value subsequent to the balance sheet date. If we intend to sell the security, or if it is more likely than not we will be required to sell the security before recovery of amortized cost basis, an OTTI write-down is recognized in earnings equal to the entire difference between the amortized cost basis and fair value of the security. For debt security that is considered other-than-temporarily impaired that we do not intend to sell or it is more likely than not that we will not be required to sell before recovery, the OTTI write-down is separated into an amount representing the credit loss, which is recognized in earnings, and the amount related to all other factors, which is recognized in OCI. The measurement of the credit loss component is equal to the difference between the debt security’s amortized cost basis and the present value of its expected future cash flows discounted at the security’s effective yield. The remaining difference between the security’s fair value and the present value of expected future cash flows is due to all other factors. We believe that we will fully collect the carrying value of securities on which we have recorded a non-credit-related impairment in OCI. Following the recognition of OTTI, the security’s new amortized cost basis is the previous basis minus the OTTI amount recognized in earnings. We recognize realized gains and losses on the sale of AFS debt securities in net gains (losses) on debt securities using the specific identification method. Unamortized premiums and discounts are recognized in interest income over the contractual life of the security using the interest method. As principal repayments are received on securities (i.e., primarily mortgage-backed securities (MBS)) a proportionate amount of the related premium or discount is recognized in income so that the effective interest rate on the remaining portion of the security continues unchanged.
Held-to-Maturity Debt Securities [Member]
Significant Accounting Policies [Line Items]
Marketable and Nonmarketable Securities, Policy [Policy Text Block]	HELD-TO-MATURITY DEBT SECURITIES Debt securities for which the Company has the positive intent and ability to hold to maturity are classified as held-to-maturity (HTM). These HTM debt securities are reported at historical cost adjusted for amortization of premiums and accretion of discounts. We recognize OTTI when there is a decline in fair value and we do not expect to recover the entire amortized cost basis of the debt security. The amortized cost is written-down to fair value with the credit loss component recorded to earnings and the remaining component recognized in OCI. The OTTI assessment related to intent to sell, required to sell, whether we expect recovery of the amortized cost basis and determination of any credit loss component recognized in earnings for HTM debt securities is the same as described for AFS debt securities. AFS debt securities transferred to the HTM classification are recorded at fair value and the unrealized gains or losses resulting from the transfer of these securities continue to be reported in cumulative OCI. The unamortized OCI balance is amortized into earnings over the remaining life of the security using the effective interest method. The HTM amortized cost basis used in the OTTI analysis includes the unamortized OCI balances related to previous security transfers .
Trading Activities [Member]
Significant Accounting Policies [Line Items]
Marketable and Nonmarketable Securities, Policy [Policy Text Block]	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. The assets and liabilities classified as trading include debt securities, loans, equity securities, derivatives and short sales, which are reported within the balance sheet line item based on the form of the instrument. In addition, debt securities that are held for investment purposes that we have elected to account for under the fair value method, are classified as trading. 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. 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.
Debt securities [Member]
Significant Accounting Policies [Line Items]
Marketable and Nonmarketable Securities, Policy [Policy Text Block]	Debt Securities Our investments in debt securities that are not held for trading purposes are classified as either debt securities available-for-sale (AFS) or held-to-maturity (HTM).
Equity securities [Member]
Significant Accounting Policies [Line Items]
Marketable and Nonmarketable Securities, Policy [Policy Text Block]	Equity Securities Marketable equity securities have readily determinable fair values and include, but are not limited to securities used in our trading activities. Marketable equity securities are recorded at fair value with unrealized gains and losses, due to changes in fair value, reflected in earnings. Unrealized gains and losses are recognized in net gains from trading activities for equity securities related to our trading activities and net gains from equity securities for the remaining securities. Realized gains and losses are recognized in net gains from trading activities for equity securities related to our trading activities and net gains from equity securities for the remaining securities. Interest and dividend income from marketable equity securities is recognized in interest income. N onmarketable equity securities do not have readily determinable fair values , and do not include investments for which we hold a controlling interest in the investee. These securities are accounted for under one of the following accounting methods: • Fair Value: This method is an election. The securities are recorded at fair value with unrealized gains or losses reflected in earnings; • Equity Method: We use this method when we have the ability to exert significant influence over the investee . These securities are carried at cost and adjusted for our share of the investee’s earnings or losses , less any impairments; • Cost Method: This method is required for specific securities, such as Federal Reserve Bank stock and Federal Home Loan Bank stock . These investments are held at their cost minus impairment. If impaired, the carrying value is written down to the fair value of the security; • Measurement Alternative: This method is followed by all remaining nonmarketable equity securities . These securities are carried at cost less impairment, and adjusted up or down to fair value upon the occurrence of orderly observable transactions of the same or similar security of the same issuer. Our review for impairment for equity method, cost method and measurement alternative securities typically includes an analysis of the facts and circumstances of each security, the intent or requirement to sell the security, the expectations of cash flows, capital needs and the viability of its business model. For equity method and cost method investments, we reduce the asset’s carrying value when we consider declines in value to be other than temporary. For securities accounted for under the measurement alternative, we reduce the asset value when the fair value is less than carrying value, without the consideration of recovery. We recognize all estimated impairment losses as an unrealized loss recorded in net gains on equity securities. Realized gains and losses on the sale of nonmarketable equity securities are recognized in net gains on equity securities.
Accounting Standards Update 2018-14 [Member]
Significant Accounting Policies [Line Items]
New Accounting Pronouncements, Policy [Policy Text Block]	ASU 2018-14 changes the disclosure requirements for our defined benefit pension and postretirement plans. We are eliminating two disclosures that are no longer considered beneficial: (1) information related to amounts in accumulated other comprehensive income to be recognized in the next year as benefit cost and (2) the effect of one-percentage point change on assumed health care cost trend rates. We have added two disclosures: (1) the weighted-average interest crediting rates for plans with promised interest crediting rates, and (2) explanations for significant gain and losses related to changes in the benefit obligation. We early adopted this change in fourth quarter 2018.
Accounting Standards Update 2018-02 [Member]
Significant Accounting Policies [Line Items]
New Accounting Pronouncements, Policy [Policy Text Block]	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 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 25 (Other Comprehensive Income). We have finalized our provisional tax estimates based on the completion of our U.S. tax filings in fourth quarter 2018.
Accounting Standards Update 2017-09 [Member]
Significant Accounting Policies [Line Items]
New Accounting Pronouncements, Policy [Policy Text Block]	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]
New Accounting Pronouncements, Policy [Policy Text Block]	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]
New Accounting Pronouncements, Policy [Policy Text Block]	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]
New Accounting Pronouncements, Policy [Policy Text Block]	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. We adopted this change in first quarter 2018. The Update is applied prospectively and did not have a material impact on our consolidated financial statements.
Accounting Standards Update 2016-18 [Member]
Significant Accounting Policies [Line Items]
New Accounting Pronouncements, Policy [Policy Text Block]	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]
New Accounting Pronouncements, Policy [Policy Text Block]	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]
New Accounting Pronouncements, Policy [Policy Text Block]	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]
New Accounting Pronouncements, Policy [Policy Text Block]	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]
New Accounting Pronouncements, Policy [Policy Text Block]	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 Reserve 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 investments, 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 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 18: Fair Values of Assets and Liabilities Loans held for sale FV-NI (1) Note 18: 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 Equity securities: Marketable FV-NI (1) Note 4: Trading Activities Nonmarketable FV-NI (1) Cost method Equity method MA (4) Note 4: Trading Activities Other assets Amortized cost (5) Note 7: Premises, Equipment, Lease Commitments and 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]
New Accounting Pronouncements, Policy [Policy Text Block]	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. We adopted the Update in first quarter 2018, and upon a modified retrospective adoption, we recorded a cumulative-effect adjustment as of January 1, 2018, 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.

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
Summary of Reporting Changes	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 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 18: Fair Values of Assets and Liabilities Loans held for sale FV-NI (1) Note 18: 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 Equity securities: Marketable FV-NI (1) Note 4: Trading Activities Nonmarketable FV-NI (1) Cost method Equity method MA (4) Note 4: Trading Activities Other assets Amortized cost (5) Note 7: Premises, Equipment, Lease Commitments and 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.
Supplemental Cash Flow Information	SUPPLEMENTAL CASH FLOW INFORMATION Noncash activities are presented in Table 1.3 , including information on transfers affecting MLHFS and debt securities. Table 1.3: Supplemental Cash Flow Information Year ended December 31, (in millions) 2018 2017 2016 Trading debt securities retained from securitizations of MLHFS $ 37,265 52,435 72,399 Transfers from loans to MLHFS 5,366 5,500 6,894 Transfers from available-for-sale debt securities to held-to-maturity debt securities 16,479 50,405 4,161 Deconsolidation of reverse mortgages previously sold: Loans — — 3,807 Long-term debt — — 3,769

Business Combinations (Tables)

Business Combinations (Tables)	12 Months Ended
	Dec. 31, 2018
Business Combinations [Abstract]
Schedule of Business Acquisitions, by Acquisition [Table Text Block]	Business combinations completed in 2017 and 2016 are presented in Table 2.1. There were no new acquisitions during 2018. As of December 31, 2018 , we had no pending acquisitions. Table 2.1: Business Combinations Activity Name of acquisition Location Type of business Date Total assets (in millions) 2017: Golden Capital Management, LLC Charlotte, NC Asset Management July 1 $ 83 2016: GE Railcar Services Chicago, IL Railcar and locomotive leasing January 1 $ 4,339 GE Capital’s Commercial Distribution Finance and Vendor Finance Businesses North America, Asia, Australia / New Zealand and EMEA Specialty Lending March 1, July 1, August 1 & October 1 32,531 Analytic Investors, LLC Los Angeles, CA Asset Management October 1 106 $ 36,976

Cash, Loan and Dividend Restr_2

Cash, Loan and Dividend Restrictions Cash, Loan and Dividend Restrictions (Tables)	12 Months Ended
	Dec. 31, 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) Dec 31, Dec 31, Average required reserve balance for FRB (1) $ 12,428 12,306 Reserve balance for non-U.S. central banks 517 617 Segregated for benefit of brokerage customers under federal and other brokerage regulations 1,135 666 Related to consolidated variable interest entities (VIEs) that can only be used to settle liabilities of VIEs 147 487 (1) FRB required reserve balance represents average for the years ended December 31, 2018 , and December 31, 2017 .

Trading Activities (Tables)

Trading Activities (Tables)	12 Months Ended
	Dec. 31, 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 Activities and Liabilities (in millions) Dec 31, Dec 31, Trading assets: Debt securities $ 69,989 57,624 Equity securities 19,449 30,004 Loans held for sale 1,469 1,023 Gross trading derivative assets 29,216 31,340 Netting (1) (19,807 ) (19,629 ) Total trading derivative assets 9,409 11,711 Total trading assets 100,316 100,362 Trading liabilities: Short sale 19,720 18,472 Gross trading derivative liabilities 28,717 31,386 Netting (1) (21,178 ) (23,062 ) Total trading derivative liabilities 7,539 8,324 Total trading liabilities $ 27,259 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 Year ended December 31, (in millions) 2018 2017 2016 Interest income (1): Debt securities $ 2,831 2,313 2,047 Equity securities 587 515 383 Loans held for sale 62 38 29 Total interest income 3,480 2,866 2,459 Less: Interest expense (2) 587 416 353 Net interest income 2,893 2,450 2,106 Net gains (losses) from trading activities: Debt securities (824 ) 125 (444 ) Equity securities (4,240 ) 3,394 1,213 Loans held for sale (1 ) 45 55 Derivatives (3) 5,667 (3,022 ) (214 ) Total net gains from trading activities (4) 602 542 610 Total trading-related net interest and noninterest income $ 3,495 2,992 2,716 (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)	12 Months Ended
	Dec. 31, 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 December 31, 2018 Available-for-sale debt securities: Securities of U.S. Treasury and federal agencies $ 13,451 3 (106 ) 13,348 Securities of U.S. states and political subdivisions (1) 48,994 716 (446 ) 49,264 Mortgage-backed securities: Federal agencies 155,974 369 (3,140 ) 153,203 Residential 2,638 142 (5 ) 2,775 Commercial 4,207 40 (22 ) 4,225 Total mortgage-backed securities 162,819 551 (3,167 ) 160,203 Corporate debt securities 6,230 131 (90 ) 6,271 Collateralized loan and other debt obligations (2) 35,581 158 (396 ) 35,343 Other (3) 5,396 100 (13 ) 5,483 Total available-for-sale debt securities 272,471 1,659 (4,218 ) 269,912 Held-to-maturity debt securities: Securities of U.S. Treasury and federal agencies 44,751 4 (415 ) 44,340 Securities of U.S. states and political subdivisions 6,286 30 (116 ) 6,200 Federal agency and other mortgage-backed securities (4) 93,685 112 (2,288 ) 91,509 Collateralized loan obligations 66 — — 66 Other (3) — — — — Total held-to-maturity debt securities 144,788 146 (2,819 ) 142,115 Total (5) $ 417,259 1,805 (7,037 ) 412,027 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 (5) $ 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 $6.3 billion each at December 31, 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 $662 million and $800 million , respectively, at December 31, 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 December 31, 2018, and $114 million each at December 31, 2017 . (4) Predominantly consists of federal agency mortgage-backed securities at both December 31, 2018 , and December 31, 2017 . (5) At December 31, 2018 and 2017 , we held no securities of any single issuer (excluding the U.S. Treasury and federal agencies and government-sponsored entities (GSEs)) with a book value that exceeded 10% of stockholder’s equity.
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 December 31, 2018 Available-for-sale debt securities: Securities of U.S. Treasury and federal agencies $ (1 ) 498 (105 ) 6,204 (106 ) 6,702 Securities of U.S. states and political subdivisions (73 ) 9,746 (373 ) 9,017 (446 ) 18,763 Mortgage-backed securities: Federal agencies (42 ) 10,979 (3,098 ) 112,252 (3,140 ) 123,231 Residential (3 ) 398 (2 ) 69 (5 ) 467 Commercial (20 ) 1,972 (2 ) 79 (22 ) 2,051 Total mortgage-backed securities (65 ) 13,349 (3,102 ) 112,400 (3,167 ) 125,749 Corporate debt securities (64 ) 1,965 (26 ) 298 (90 ) 2,263 Collateralized loan and other debt obligations (388 ) 28,306 (8 ) 553 (396 ) 28,859 Other (7 ) 819 (6 ) 159 (13 ) 978 Total available-for-sale debt securities (598 ) 54,683 (3,620 ) 128,631 (4,218 ) 183,314 Held-to-maturity debt securities: Securities of U.S. Treasury and federal agencies (3 ) 895 (412 ) 41,083 (415 ) 41,978 Securities of U.S. states and political subdivisions (4 ) 598 (112 ) 3,992 (116 ) 4,590 Federal agency and other mortgage-backed securities (5 ) 4,635 (2,283 ) 77,741 (2,288 ) 82,376 Collateralized loan obligations — — — — — — Total held-to-maturity debt securities (12 ) 6,128 (2,807 ) 122,816 (2,819 ) 128,944 Total $ (610 ) 60,811 (6,427 ) 251,447 (7,037 ) 312,258 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 $20 million and $5.2 billion , respectively, at December 31, 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 December 31, 2018 Available-for-sale debt securities: Securities of U.S. Treasury and federal agencies $ (106 ) 6,702 — — Securities of U.S. states and political subdivisions (425 ) 18,447 (21 ) 316 Mortgage-backed securities: Federal agencies (3,140 ) 123,231 — — Residential (2 ) 295 (3 ) 172 Commercial (20 ) 1,999 (2 ) 52 Total mortgage-backed securities (3,162 ) 125,525 (5 ) 224 Corporate debt securities (17 ) 791 (73 ) 1,472 Collateralized loan and other debt obligations (396 ) 28,859 — — Other (7 ) 726 (6 ) 252 Total available-for-sale debt securities (4,113 ) 181,050 (105 ) 2,264 Held-to-maturity debt securities: Securities of U.S. Treasury and federal agencies (415 ) 41,978 — — Securities of U.S. states and political subdivisions (116 ) 4,590 — — Federal agency and other mortgage-backed securities (2,278 ) 81,977 (10 ) 399 Collateralized loan obligations — — — — Total held-to-maturity debt securities (2,809 ) 128,545 (10 ) 399 Total $ (6,922 ) 309,595 (115 ) 2,663 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 December 31, 2018 Available-for-sale debt securities (1): Fair value: Securities of U.S. Treasury and federal agencies $ 13,348 1.87 % $ 1,087 1.52 % $ 12,213 1.90 % $ 48 1.89 % $ — — % Securities of U.S. states and political subdivisions 49,264 4.78 3,568 2.92 6,644 3.42 4,635 3.44 34,417 5.42 Mortgage-backed securities: Federal agencies 153,203 3.42 — — 169 3.52 1,909 2.56 151,125 3.43 Residential 2,775 4.01 — — 14 5.85 6 3.04 2,755 4.00 Commercial 4,225 3.64 — — — — 342 3.60 3,883 3.65 Total mortgage-backed securities 160,203 3.44 — — 183 3.70 2,257 2.72 157,763 3.45 Corporate debt securities 6,271 5.11 390 6.27 2,525 5.25 2,743 4.68 613 5.67 Collateralized loan and other debt obligations 35,343 3.89 — — 28 4.18 8,866 3.91 26,449 3.89 Other 5,483 3.17 15 6.02 818 3.84 1,446 2.17 3,204 3.44 Total available-for-sale debt securities at fair value $ 269,912 3.70 % $ 5,060 2.89 % $ 22,411 2.82 % $ 19,995 3.64 % $ 222,446 3.81 % 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 December 31, 2018 Held-to-maturity debt securities (1): Amortized cost: Securities of U.S. Treasury and federal agencies $ 44,751 2.12 % $ — — % $ 32,356 2.04 % $ 12,395 2.32 % $ — — % Securities of U.S. states and political subdivisions 6,286 4.93 — — 72 6.04 1,188 4.91 5,026 4.92 Federal agency and other mortgage-backed securities 93,685 3.10 — — 26 3.52 — — 93,659 3.10 Collateralized loan obligations 66 3.62 — — — — 66 3.62 — — Other — — — — — — — — — — Total held-to-maturity debt securities at amortized cost $ 144,788 2.87 % $ — — % $ 32,454 2.05 % $ 13,649 2.55 % $ 98,685 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 December 31, 2018 Held-to-maturity debt securities: Fair value: Securities of U.S. Treasury and federal agencies $ 44,340 — 32,073 12,267 — Securities of U.S. states and political subdivisions 6,200 — 70 1,191 4,939 Federal agency and other mortgage-backed securities 91,509 — 26 — 91,483 Collateralized loan obligations 66 — — 66 — Other — — — — — Total held-to-maturity debt securities at fair value $ 142,115 — 32,169 13,524 96,422 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 Year ended December 31, (in millions) 2018 2017 2016 Gross realized gains $ 155 948 1,234 Gross realized losses (19 ) (207 ) (103 ) OTTI write-downs (28 ) (262 ) (189 ) Net realized gains from available-for-sale debt securities $ 108 479 942
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 years ended December 31, 2018 , 2017 or 2016 . Table 5.8: Detail of OTTI Write-downs Year ended December 31, (in millions) 2018 2017 2016 Debt securities OTTI write-downs included in earnings: Securities of U.S. states and political subdivisions $ 2 150 63 Mortgage-backed securities: Residential 4 11 34 Commercial 18 80 14 Corporate debt securities — 21 72 Other debt securities 4 — 6 Total debt securities OTTI write-downs included in earnings $ 28 262 189
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 Year ended December 31, (in millions) 2018 2017 2016 OTTI on debt securities Recorded as part of gross realized losses: Credit-related OTTI $ 27 119 143 Intent-to-sell OTTI 1 143 46 Total recorded as part of gross realized losses 28 262 189 Changes to OCI for losses (reversal of losses) in non-credit-related OTTI (1): Securities of U.S. states and political subdivisions (2 ) (5 ) 8 Residential mortgage-backed securities 2 (1 ) (3 ) Commercial mortgage-backed securities (11 ) (51 ) 24 Corporate debt securities — 1 (13 ) Other debt securities — (1 ) 2 Total changes to OCI for non-credit-related OTTI (11 ) (57 ) 18 Total OTTI losses (reversal of losses) recorded on debt securities $ 17 205 207 (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 Year ended December 31, (in millions) 2018 2017 2016 Credit loss recognized, beginning of year $ 742 1,043 1,092 Additions: For securities with initial credit impairments 1 9 85 For securities with previous credit impairments 26 110 58 Total additions 27 119 143 Reductions: For securities sold, matured, or intended/required to be sold (204 ) (414 ) (184 ) For recoveries of previous credit impairments (1) (3 ) (6 ) (8 ) Total reductions (207 ) (420 ) (192 ) Credit loss recognized, end of year $ 562 742 1,043 (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)	12 Months Ended
	Dec. 31, 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 $1.3 billion and $3.9 billion at December 31, 2018 and 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 December 31, (in millions) 2018 2017 2016 2015 2014 Commercial: Commercial and industrial $ 350,199 333,125 330,840 299,892 271,795 Real estate mortgage 121,014 126,599 132,491 122,160 111,996 Real estate construction 22,496 24,279 23,916 22,164 18,728 Lease financing 19,696 19,385 19,289 12,367 12,307 Total commercial 513,405 503,388 506,536 456,583 414,826 Consumer: Real estate 1-4 family first mortgage 285,065 284,054 275,579 273,869 265,386 Real estate 1-4 family junior lien mortgage 34,398 39,713 46,237 53,004 59,717 Credit card 39,025 37,976 36,700 34,039 31,119 Automobile 45,069 53,371 62,286 59,966 55,740 Other revolving credit and installment 36,148 38,268 40,266 39,098 35,763 Total consumer 439,705 453,382 461,068 459,976 447,725 Total loans $ 953,110 956,770 967,604 916,559 862,551 Our foreign loans are reported by respective class of financing receivable in the table above. Substantially all of our foreign loan portfolio is commercial loans. Loans are classified as foreign primarily based on whether the borrower’s primary address is outside of the United States. Table 6.2 presents total commercial foreign loans outstanding by class of financing receivable. Table 6.2: Commercial Foreign Loans Outstanding December 31, (in millions) 2018 2017 2016 2015 2014 Commercial foreign loans: Commercial and industrial $ 62,564 60,106 55,396 49,049 44,707 Real estate mortgage 6,731 8,033 8,541 8,350 4,776 Real estate construction 1,011 655 375 444 218 Lease financing 1,159 1,126 972 274 336 Total commercial foreign loans $ 71,465 69,920 65,284 58,117 50,037
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 primarily includes loans purchased and sales of whole loan or participating interests, whereby we receive or transfer a portion of a loan after origination. The table excludes PCI loans and loans recorded at fair value, including loans originated for sale because their loan activity normally does not impact the allowance for credit losses. Table 6.3: Loan Purchases, Sales, and Transfers Year ended December 31, 2018 2017 (in millions) Commercial Consumer (1) Total Commercial Consumer (1) Total Purchases $ 2,065 16 2,081 3,675 2 3,677 Sales (1,905 ) (261 ) (2,166 ) (2,066 ) (425 ) (2,491 ) Transfers to MLHFS/LHFS (617 ) (1,995 ) (2,612 ) (736 ) (2 ) (738 ) (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	he 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) Dec 31, Dec 31, Commercial: Commercial and industrial $ 330,492 326,626 Real estate mortgage 6,984 7,485 Real estate construction 16,400 16,621 Total commercial 353,876 350,732 Consumer: Real estate 1-4 family first mortgage 29,736 29,876 Real estate 1-4 family junior lien mortgage 37,719 38,897 Credit card 109,840 108,465 Other revolving credit and installment 27,530 27,541 Total consumer 204,825 204,779 Total unfunded credit commitments $ 558,701 555,511
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 Year ended December 31, (in millions) 2018 2017 2016 2015 2014 Balance, beginning of year $ 11,960 12,540 12,512 13,169 14,971 Provision for credit losses 1,744 2,528 3,770 2,442 1,395 Interest income on certain impaired loans (1) (166 ) (186 ) (205 ) (198 ) (211 ) Loan charge-offs: Commercial: Commercial and industrial (727 ) (789 ) (1,419 ) (734 ) (627 ) Real estate mortgage (42 ) (38 ) (27 ) (59 ) (66 ) Real estate construction — — (1 ) (4 ) (9 ) Lease financing (70 ) (45 ) (41 ) (14 ) (15 ) Total commercial (839 ) (872 ) (1,488 ) (811 ) (717 ) Consumer: Real estate 1-4 family first mortgage (179 ) (240 ) (452 ) (507 ) (721 ) Real estate 1-4 family junior lien mortgage (179 ) (279 ) (495 ) (635 ) (864 ) Credit card (1,599 ) (1,481 ) (1,259 ) (1,116 ) (1,025 ) Automobile (947 ) (1,002 ) (845 ) (742 ) (729 ) Other revolving credit and installment (685 ) (713 ) (708 ) (643 ) (668 ) Total consumer (3,589 ) (3,715 ) (3,759 ) (3,643 ) (4,007 ) Total loan charge-offs (4,428 ) (4,587 ) (5,247 ) (4,454 ) (4,724 ) Loan recoveries: Commercial: Commercial and industrial 304 297 263 252 369 Real estate mortgage 70 82 116 127 160 Real estate construction 13 30 38 37 136 Lease financing 23 17 11 8 8 Total commercial 410 426 428 424 673 Consumer: Real estate 1-4 family first mortgage 267 288 373 245 212 Real estate 1-4 family junior lien mortgage 219 266 266 259 238 Credit card 307 239 207 175 161 Automobile 363 319 325 325 349 Other revolving credit and installment 118 121 128 134 146 Total consumer 1,274 1,233 1,299 1,138 1,106 Total loan recoveries 1,684 1,659 1,727 1,562 1,779 Net loan charge-offs (2,744 ) (2,928 ) (3,520 ) (2,892 ) (2,945 ) Other (87 ) 6 (17 ) (9 ) (41 ) Balance, end of year $ 10,707 11,960 12,540 12,512 13,169 Components: Allowance for loan losses $ 9,775 11,004 11,419 11,545 12,319 Allowance for unfunded credit commitments 932 956 1,121 967 850 Allowance for credit losses $ 10,707 11,960 12,540 12,512 13,169 Net loan charge-offs as a percentage of average total loans 0.29 % 0.31 0.37 0.33 0.35 Allowance for loan losses as a percentage of total loans 1.03 1.15 1.18 1.26 1.43 Allowance for credit losses as a percentage of total loans 1.12 1.25 1.30 1.37 1.53 (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 for Credit Losses 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 Year ended December 31, 2018 2017 (in millions) Commercial Consumer Total Commercial Consumer Total Balance, beginning of year $ 6,632 5,328 11,960 7,394 5,146 12,540 Provision (reversal of provision) for credit losses 281 1,463 1,744 (261 ) 2,789 2,528 Interest income on certain impaired loans (47 ) (119 ) (166 ) (59 ) (127 ) (186 ) Loan charge-offs (839 ) (3,589 ) (4,428 ) (872 ) (3,715 ) (4,587 ) Loan recoveries 410 1,274 1,684 426 1,233 1,659 Net loan charge-offs (429 ) (2,315 ) (2,744 ) (446 ) (2,482 ) (2,928 ) Other (20 ) (67 ) (87 ) 4 2 6 Balance, end of year $ 6,417 4,290 10,707 6,632 5,328 11,960
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 December 31, 2018 Collectively evaluated (1) $ 5,903 3,361 9,264 510,180 421,574 931,754 Individually evaluated (2) 514 929 1,443 3,221 13,126 16,347 PCI (3) — — — 4 5,005 5,009 Total $ 6,417 4,290 10,707 513,405 439,705 953,110 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 3-3) and pursuant to amendments by ASU 2010-20 regarding allowance for PCI loans.
Loans by Credit Quality Indicator	Table 6.8 provides a breakdown of outstanding commercial loans by risk category. Of the $14.8 billion in criticized commercial and industrial loans and $4.8 billion in criticized commercial real estate (CRE) loans at December 31, 2018 , $1.5 billion and $612 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 December 31, 2018 By risk category: Pass $ 335,412 116,514 22,207 18,671 492,804 Criticized 14,783 4,500 289 1,025 20,597 Total commercial loans (excluding PCI) 350,195 121,014 22,496 19,696 513,401 Total commercial PCI loans (carrying value) 4 — — — 4 Total commercial loans $ 350,199 121,014 22,496 19,696 513,405 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 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 December 31, 2018 By delinquency status: Current-29 days past due (DPD) and still accruing $ 348,158 120,176 22,411 19,443 510,188 30-89 DPD and still accruing 508 207 53 163 931 90+ DPD and still accruing 43 51 — — 94 Nonaccrual loans 1,486 580 32 90 2,188 Total commercial loans (excluding PCI) 350,195 121,014 22,496 19,696 513,401 Total commercial PCI loans (carrying value) 4 — — — 4 Total commercial loans $ 350,199 121,014 22,496 19,696 513,405 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 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 December 31, 2018 By delinquency status: Current-29 DPD $ 263,881 33,644 38,008 43,604 35,794 414,931 30-59 DPD 1,411 247 292 1,040 140 3,130 60-89 DPD 549 126 212 314 87 1,288 90-119 DPD 257 74 192 109 80 712 120-179 DPD 225 77 320 2 27 651 180+ DPD 822 213 1 — 20 1,056 Government insured/guaranteed loans (1) 12,688 — — — — 12,688 Loans held at fair value 244 — — — — 244 Total consumer loans (excluding PCI) 280,077 34,381 39,025 45,069 36,148 434,700 Total consumer PCI loans (carrying value) 4,988 17 — — — 5,005 Total consumer loans $ 285,065 34,398 39,025 45,069 36,148 439,705 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) 14,767 — — — — 14,767 Loans held at fair value 376 — — — — 376 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 $7.7 billion at December 31, 2018 , compared with $10.5 billion at December 31, 2017 .
Loans by FICO Score, Consumer	Table 6.11: Consumer Loans by FICO (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 December 31, 2018 By FICO: < 600 $ 4,273 1,454 3,292 7,071 697 16,787 600-639 2,974 994 2,777 4,431 725 11,901 640-679 5,810 1,898 6,464 6,225 1,822 22,219 680-719 13,568 3,908 9,445 7,354 3,384 37,659 720-759 27,258 5,323 7,949 6,853 4,395 51,778 760-799 57,193 6,315 5,227 5,947 5,322 80,004 800+ 151,465 13,190 3,794 7,099 8,411 183,959 No FICO available 4,604 1,299 77 89 2,507 8,576 FICO not required — — — — 8,885 8,885 Government insured/guaranteed loans (1) 12,932 — — — — 12,932 Total consumer loans (excluding PCI) 280,077 34,381 39,025 45,069 36,148 434,700 Total consumer PCI loans (carrying value) 4,988 17 — — — 5,005 Total consumer loans $ 285,065 34,398 39,025 45,069 36,148 439,705 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 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 December 31, 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% $ 147,666 15,753 163,419 133,902 16,301 150,203 60.01-80% 104,477 11,183 115,660 104,639 12,918 117,557 80.01-100% 12,372 4,874 17,246 13,924 6,580 20,504 100.01-120% (1) 1,211 1,596 2,807 1,868 2,427 4,295 > 120% (1) 484 578 1,062 783 1,008 1,791 No LTV/CLTV available 935 397 1,332 1,073 452 1,525 Government insured/guaranteed loans (2) 12,932 — 12,932 15,143 — 15,143 Total consumer loans (excluding PCI) 280,077 34,381 314,458 271,332 39,686 311,018 Total consumer PCI loans (carrying value) 4,988 17 5,005 12,722 27 12,749 Total consumer loans $ 285,065 34,398 319,463 284,054 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 Dec 31, Dec 31, (in millions) 2018 2017 Commercial: Commercial and industrial $ 1,486 1,899 Real estate mortgage 580 628 Real estate construction 32 37 Lease financing 90 76 Total commercial 2,188 2,640 Consumer: Real estate 1-4 family first mortgage (1) 3,183 3,732 Real estate 1-4 family junior lien mortgage 945 1,086 Automobile 130 130 Other revolving credit and installment 50 58 Total consumer 4,308 5,006 Total nonaccrual loans (excluding PCI) $ 6,496 7,646 (1) Prior period has been revised to exclude $390 million of MLHFS, LHFS and loans held at fair value.
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 (1) Dec 31, Dec 31, (in millions) 2018 2017 Total (excluding PCI): $ 8,704 11,532 Less: FHA insured/VA guaranteed (2) 7,725 10,475 Total, not government insured/guaranteed $ 979 1,057 By segment and class, not government insured/guaranteed: Commercial: Commercial and industrial $ 43 26 Real estate mortgage 51 23 Total commercial 94 49 Consumer: Real estate 1-4 family first mortgage 124 213 Real estate 1-4 family junior lien mortgage 32 60 Credit card 513 492 Automobile 114 143 Other revolving credit and installment 102 100 Total consumer 885 1,008 Total, not government insured/guaranteed $ 979 1,057 (1) Financial information for the prior period December 31, 2017 has been revised to exclude MLHFS, LHFS and loans held at fair value, which reduced “Total, not government insured/guaranteed” by $6 million . (2) Represents loans whose repayments are predominantly insured by the FHA or guaranteed by the VA.
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 $149 million at December 31, 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). 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 December 31, 2018 Commercial: Commercial and industrial $ 3,057 2,030 1,730 319 Real estate mortgage 1,228 1,032 1,009 154 Real estate construction 74 47 46 9 Lease financing 146 112 112 32 Total commercial 4,505 3,221 2,897 514 Consumer: Real estate 1-4 family first mortgage 12,309 10,738 4,420 525 Real estate 1-4 family junior lien mortgage 1,886 1,694 1,133 183 Credit card 449 449 449 172 Automobile 153 89 43 8 Other revolving credit and installment 162 156 136 41 Total consumer (2) 14,959 13,126 6,181 929 Total impaired loans (excluding PCI) $ 19,464 16,347 9,078 1,443 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 and $1.4 billion at December 31, 2018 and 2017 , respectively, 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.
Impaired Loans, Average Recorded Investment and Interest Income	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 Year ended December 31, 2018 2017 2016 (in millions) Average recorded investment Recognized interest income Average recorded investment Recognized interest income Average recorded investment Recognized interest income Commercial: Commercial and industrial $ 2,287 173 3,241 118 3,408 101 Real estate mortgage 1,193 89 1,328 91 1,636 128 Real estate construction 60 7 66 14 115 11 Lease financing 125 1 105 1 88 — Total commercial 3,665 270 4,740 224 5,247 240 Consumer: Real estate 1-4 family first mortgage 11,522 664 13,326 730 15,857 828 Real estate 1-4 family junior lien mortgage 1,804 116 2,041 121 2,294 132 Credit card 407 50 323 36 295 34 Automobile 86 11 86 11 93 11 Other revolving credit and installment 142 10 117 8 89 6 Total consumer 13,961 851 15,893 906 18,628 1,011 Total impaired loans (excluding PCI) $ 17,626 1,121 20,633 1,130 23,875 1,251 Interest income: Cash basis of accounting $ 338 299 353 Other (1) 783 831 898 Total interest income $ 1,121 1,130 1,251 (1) Includes interest recognized on accruing TDRs, interest recognized related to certain impaired loans which have an allowance calculated using discounting, and amortization of purchase accounting adjustments related to certain impaired loans.
Troubled Debt Restructurings, Modification by Type	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) Year ended December 31, 2018 Commercial: Commercial and industrial $ 13 29 2,310 2,352 58 1.18 % $ 29 Real estate mortgage — 44 375 419 — 0.88 44 Real estate construction — — 25 25 — — — Lease financing — — 63 63 — — — Total commercial 13 73 2,773 2,859 58 1.00 73 Consumer: Real estate 1-4 family first mortgage 209 26 1,042 1,277 4 2.25 119 Real estate 1-4 family junior lien mortgage 7 41 113 161 5 2.14 45 Credit card — 336 — 336 — 12.54 336 Automobile 13 16 55 84 30 6.21 16 Other revolving credit and installment — 49 12 61 — 7.95 49 Trial modifications (6) — — 8 8 — — — Total consumer 229 468 1,230 1,927 39 8.96 565 Total $ 242 541 4,003 4,786 97 8.06 % $ 638 Year ended December 31, 2017 Commercial: Commercial and industrial $ 24 45 2,912 2,981 173 0.64 % $ 45 Real estate mortgage 5 59 507 571 20 1.28 59 Real estate construction — 1 26 27 — 0.69 1 Lease financing — — 37 37 — — — Total commercial 29 105 3,482 3,616 193 1.00 105 Consumer: Real estate 1-4 family first mortgage 231 140 1,035 1,406 15 2.57 257 Real estate 1-4 family junior lien mortgage 25 82 81 188 14 3.26 93 Credit card — 257 — 257 — 11.98 257 Automobile 2 15 67 84 39 5.89 15 Other revolving credit and installment — 47 8 55 1 7.47 47 Trial modifications (6) — — (28 ) (28 ) — — — Total consumer 258 541 1,163 1,962 69 6.70 669 Total $ 287 646 4,645 5,578 262 5.92 % $ 774 Year ended December 31, 2016 Commercial: Commercial and industrial $ 42 130 3,154 3,326 360 1.91 % $ 130 Real estate mortgage 2 105 560 667 1 1.15 105 Real estate construction — 27 72 99 — 1.02 27 Lease financing — — 8 8 — — — Total commercial 44 262 3,794 4,100 361 1.51 262 Consumer: Real estate 1-4 family first mortgage 338 288 1,411 2,037 49 2.69 507 Real estate 1-4 family junior lien mortgage 23 109 106 238 37 3.07 130 Credit card — 180 — 180 — 12.09 180 Automobile 2 16 57 75 36 6.07 16 Other revolving credit and installment 1 33 10 44 2 6.83 33 Trial modifications (6) — — 44 44 — — — Total consumer 364 626 1,628 2,618 124 4.92 866 Total $ 408 888 5,422 6,718 485 4.13 % $ 1,128 (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 $1.9 billion , $2.1 billion and $1.6 billion , for the years ended December 31, 2018 , 2017 , and 2016 , 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 $28 million , $32 million and $67 million for the years ended December 31, 2018 , 2017 , and 2016 , 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.
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 Year ended December 31, (in millions) 2018 2017 2016 Commercial: Commercial and industrial $ 198 173 124 Real estate mortgage 76 61 66 Real estate construction 36 4 3 Lease financing — 1 — Total commercial 310 239 193 Consumer: Real estate 1-4 family first mortgage 60 114 138 Real estate 1-4 family junior lien mortgage 14 19 20 Credit card 79 74 56 Automobile 14 15 13 Other revolving credit and installment 6 5 4 Total consumer 173 227 231 Total $ 483 466 424
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 Dec 31, Dec 31, (in millions) 2018 2017 Total commercial $ 4 86 Consumer: Real estate 1-4 family first mortgage 4,988 12,722 Real estate 1-4 family junior lien mortgage 17 27 Total consumer 5,005 12,749 Total PCI loans (carrying value) $ 5,009 12,835 Total PCI loans (unpaid principal balance) $ 7,348 18,975
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 2018 also reflect $2.4 billion in gains on the sale of $6.2 billion Pick-a-Pay PCI loans. Table 6.20: Change in Accretable Yield (in millions) 2018 2017 2016 2009-2015 Total, beginning of period $ 8,887 11,216 16,301 10,447 Addition of accretable yield due to acquisitions — 2 27 132 Accretion into interest income (1) (1,094 ) (1,406 ) (1,365 ) (14,212 ) Accretion into noninterest income due to sales (2) (2,374 ) (334 ) (9 ) (458 ) Reclassification from nonaccretable difference for loans with improving credit-related cash flows 403 642 1,221 9,734 Changes in expected cash flows that do not affect nonaccretable difference (3) (2,789 ) (1,233 ) (4,959 ) 10,658 Total, end of period $ 3,033 8,887 11,216 16,301 (1) Includes accretable yield released as a result of settlements with borrowers, which is included in interest income. (2) Includes accretable yield released as a result of sales to third parties, which is included in noninterest income. (3) Represents changes in cash flows expected to be collected due to the impact of modifications, changes in prepayment assumptions, changes in interest rates on variable rate PCI loans and sales to third parties.
Purchased Credit Impaired Loans 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) Dec. 31, 2018 Dec. 31, 2017 By risk category: Pass $ 1 8 Criticized 3 78 Total commercial PCI loans $ 4 86
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) Dec. 31, 2018 Dec. 31, 2017 By delinquency status: Current-29 DPD and still accruing $ 3 86 30-89 DPD and still accruing 1 — Total commercial PCI loans $ 4 86
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 December 31, 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 $ 5,545 117 5,662 13,127 138 13,265 30-59 DPD and still accruing 495 8 503 1,317 8 1,325 60-89 DPD and still accruing 229 3 232 622 3 625 90-119 DPD and still accruing 99 2 101 293 2 295 120-179 DPD and still accruing 54 1 55 219 2 221 180+ DPD and still accruing 353 3 356 1,310 4 1,314 Total consumer PCI loans (adjusted unpaid principal balance) $ 6,775 134 6,909 16,888 157 17,045 Total consumer PCI loans (carrying value) $ 4,988 17 5,005 12,722 27 12,749
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 December 31, 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 $ 1,418 27 1,445 4,014 37 4,051 600-639 713 18 731 2,086 20 2,106 640-679 898 20 918 2,393 24 2,417 680-719 970 24 994 2,242 29 2,271 720-759 843 20 863 1,779 23 1,802 760-799 523 11 534 933 12 945 800+ 381 6 387 468 6 474 No FICO available 1,029 8 1,037 2,973 6 2,979 Total consumer PCI loans (adjusted unpaid principal balance) $ 6,775 134 6,909 16,888 157 17,045 Total consumer PCI loans (carrying value) $ 4,988 17 5,005 12,722 27 12,749
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 December 31, 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% $ 3,970 44 4,014 8,010 45 8,055 60.01-80% 2,161 53 2,214 6,510 63 6,573 80.01-100% 542 28 570 1,975 35 2,010 100.01-120% (1) 82 8 90 319 10 329 > 120% (1) 19 1 20 73 3 76 No LTV/CLTV available 1 — 1 1 1 2 Total consumer PCI loans (adjusted unpaid principal balance) $ 6,775 134 6,909 16,888 157 17,045 Total consumer PCI loans (carrying value) $ 4,988 17 5,005 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.

Premises, Equipment, Lease Co_2

Premises, Equipment, Lease Commitments and Other Assets (Tables)	12 Months Ended
	Dec. 31, 2018
Premises, Equipment, Lease Commitments, And Other Assets [Abstract]
Premises and Equipment	Table 7.1: Premises and Equipment (in millions) Dec 31, 2018 Dec 31, 2017 Land $ 1,757 1,799 Buildings 8,974 8,865 Furniture and equipment 6,896 7,089 Leasehold improvements 2,387 2,291 Premises and equipment leased under capital leases 75 103 Total premises and equipment 20,089 20,147 Less: Accumulated depreciation and amortization 11,169 11,300 Net book value, premises and equipment $ 8,920 8,847
Minimum Lease Payments Of Operating Leases	Table 7.2 provides the future minimum payments of noncancelable operating leases, net of sublease income, with terms greater than one year as of December 31, 2018 . Table 7.2: Minimum Lease Payments of Operating Leases (in millions) Year ended December 31, 2019 $ 1,174 2020 1,056 2021 880 2022 713 2023 577 Thereafter 1,654 Total $ 6,054
Components of Other Assets	Table 7.3 presents the components of other assets. Table 7.3: Other Assets (in millions) Dec 31, 2018 Dec 31, 2017 Corporate/bank-owned life insurance $ 19,751 19,549 Accounts receivable (1) 34,281 39,127 Interest receivable 6,084 5,688 Core deposit intangibles — 769 Customer relationship and other amortized intangibles 545 841 Foreclosed assets: Residential real estate: Government insured/guaranteed (1) 88 120 Non-government insured/guaranteed 229 252 Non-residential real estate 134 270 Operating lease assets 9,036 9,666 Due from customers on acceptances 258 177 Other 9,444 13,785 Total other assets $ 79,850 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).

Equity Securities Equity Secu_2

Equity Securities Equity Securities (Tables)	12 Months Ended
	Dec. 31, 2018
Equity Securities [Abstract]
Equity Securities	Table 8.1 provides a summary of our equity securities by business purpose and accounting method, including equity securities with readily determinable fair values (marketable) and those without readily determinable fair values (nonmarketable). Table 8.1: Equity Securities (in millions) Dec 31, Dec 31, Held for trading at fair value: Marketable equity securities $ 19,449 30,004 Not held for trading: Fair value: Marketable equity securities (1) 4,513 4,356 Nonmarketable equity securities (2) 5,594 4,867 Total equity securities at fair value 10,107 9,223 Equity method: LIHTC (3) 10,999 10,269 Private equity 3,832 3,839 Tax-advantaged renewable energy 3,073 1,950 New market tax credit and other 311 294 Total equity method 18,215 16,352 Other: Federal Reserve Bank stock and other at cost (4) 5,643 5,828 Private equity (5) 1,734 1,090 Total equity securities not held for trading 35,699 32,493 Total equity securities (6) $ 55,148 62,497 (1) Includes $3.2 billion and $3.7 billion at December 31, 2018 and 2017 , respectively, related to securities held as economic hedges of our deferred compensation plan obligations. (2) Includes $5.5 billion and $4.9 billion at December 31, 2018 and 2017 , respectively, related to investments for which we elected the fair value option. See Note 18 (Fair Value of Assets and Liabilities) for additional information. (3) Represents low-income housing tax credit investments. (4) Includes $5.6 billion and $5.4 billion at December 31, 2018 and 2017 , respectively, 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. (6) At December 31, 2018 and 2017 , we held no securities of any single issuer with a book value that exceeded 10% of stockholder’s equity.
Net Gains (Losses) from Equity Securities	Table 8.2 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 8.2: Net Gains (Losses) from Equity Securities Year ended December 31, (in millions) 2018 2017 2016 Net gains (losses) from equity securities carried at fair value: Marketable equity securities $ (389 ) 967 525 Nonmarketable equity securities 709 1,557 (21 ) Total equity securities carried at fair value 320 2,524 504 Net gains (losses) from nonmarketable equity securities not carried at fair value: Impairment write-downs (352 ) (339 ) (448 ) Net unrealized gains related to measurement alternative observable transactions 418 — — Net realized gains on sale 1,504 980 849 All other 33 97 73 Total nonmarketable equity securities not carried at fair value 1,603 738 474 Net gains (losses) from economic hedge derivatives (1) (408 ) (1,483 ) 125 Total net gains from equity securities $ 1,515 1,779 1,103 (1) Includes net gains (losses) on derivatives not designated as hedging instruments.
Measurement Alternative	Table 8.3 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 8.2 . Table 8.3: Measurement Alternative Year ended December 31, (in millions) 2018 Net gains (losses) recognized in earnings during the period: Gross unrealized gains due to observable price changes $ 443 Gross unrealized losses due to observable price changes (25 ) Impairment write-downs (33 ) Realized net gains from sale 274 Total net gains recognized during the period $ 659

Securitizations and Variable _2

Securitizations and Variable Interest Entities (Tables)	12 Months Ended
	Dec. 31, 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 December 31, 2018 Cash and due from banks $ — 139 — 139 Interest-earning deposits with banks — 8 — 8 Debt securities: Trading debt securities 2,110 45 200 2,355 Available-for-sale debt securities (1) 2,686 — 317 3,003 Held-to-maturity debt securities 510 — — 510 Loans 1,433 13,564 94 15,091 Mortgage servicing rights 14,761 — — 14,761 Derivative assets 53 — — 53 Equity securities 11,041 85 — 11,126 Other assets — 221 6 227 Total assets 32,594 14,062 617 47,273 Short-term borrowings — — 493 493 Derivative liabilities 26 — (2) — 26 Accrued expenses and other liabilities 231 191 (2) 8 430 Long-term debt 3,870 816 (2) 93 4,779 Total liabilities 4,127 1,007 594 5,728 Noncontrolling interests — 34 — 34 Net assets $ 28,467 13,021 23 41,511 December 31, 2017 Cash and due from banks $ — 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 December 31, 2018 Residential mortgage loan securitizations: Conforming (2) $ 1,172,833 2,377 13,811 — (171 ) 16,017 Other/nonconforming 10,596 453 57 — — 510 Commercial mortgage securitizations 153,350 2,409 893 (22 ) (40 ) 3,240 Collateralized debt obligations: Debt securities 659 — — 5 (20 ) (15 ) Loans (3) — — — — — — Asset-based finance structures 304 205 — — — 205 Tax credit structures 35,185 12,087 — — (3,870 ) 8,217 Collateralized loan obligations 2 — — — — — Investment funds 185 42 — — — 42 Other (4) 1,688 207 — 44 — 251 Total $ 1,374,802 17,780 14,761 27 (4,101 ) 28,467 Maximum exposure to loss Debt and equity interests (1) Servicing assets Derivatives Other commitments and guarantees Total exposure Residential mortgage loan securitizations: Conforming $ 2,377 13,811 — 1,183 17,371 Other/nonconforming 453 57 — — 510 Commercial mortgage securitizations 2,409 893 28 11,563 14,893 Collateralized debt obligations: Debt securities — — 5 20 25 Loans (3) — — — — — Asset-based finance structures 205 — — 71 276 Tax credit structures 12,087 — — 1,420 13,507 Collateralized loan obligations — — — — — Investment funds 42 — — — 42 Other (4) 207 — 45 158 410 Total $ 17,780 14,761 78 14,415 47,034 (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 $11.0 billion and $10.7 billion at December 31, 2018 and 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 $1.2 billion and $2.2 billion at December 31, 2018 and 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. At December 31, 2017, also contains investments in auction rate securities (ARS) issued by VIEs that we did 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 in which we have a continuing involvement with the transferred financial assets. Table 9.3: Cash Flows From Sales and Securitization Activity Year ended December 31, 2018 2017 2016 (in millions) Mortgage loans Other financial assets Mortgage loans Other financial assets Mortgage loans Other financial assets Proceeds from securitizations and whole loan sales $ 193,721 — 228,282 25 252,723 347 Fees from servicing rights retained 3,337 — 3,352 — 3,492 — Cash flows from other interests held (1) 698 1 2,218 1 2,898 1 Repurchases of assets/loss reimbursements (2): Non-agency securitizations and whole loan transactions 3 — 12 — 26 — Agency securitizations (3) 96 — 92 — 133 — Servicing advances, net of repayments (154 ) — (269 ) — (218 ) — (1) Cash flows from other interests held include principal and interest payments received on retained bonds and excess cash flows received on interest-only strips. (2) Consists of cash paid to repurchase loans from investors and cash paid to investors to reimburse them for losses on individual loans that are already liquidated. In addition, during 2018 and 2017 , we paid nothing to third-party investors to settle repurchase liabilities on pools of loans, compared with $11 million in 2016 . (3) Represent loans repurchased from GNMA, FNMA, and FHLMC under representation and warranty provisions included in our loan sales contracts. Excludes $7.8 billion in delinquent insured/guaranteed loans that we service and have exercised our option to purchase out of GNMA pools in 2018 , compared with $8.6 billion and $9.9 billion in 2017 and 2016 , respectively. These loans are predominantly insured by the FHA or guaranteed by the VA.
Residential Mortgage Servicing Rights	Table 9.4 presents the key weighted-average assumptions we used to measure residential mortgage servicing rights at the date of securitization. Table 9.4: Residential Mortgage Servicing Rights Residential mortgage servicing rights 2018 2017 2016 Year ended December 31, Prepayment speed (1) 10.6 % 11.5 11.7 Discount rate 7.4 7.0 6.5 Cost to service ($ per loan) (2) $ 128 132 132 (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 December 31, 2018 $ 14,649 16 668 309 Expected weighted-average life (in years) 6.5 3.6 7.0 5.7 Key economic assumptions: Prepayment speed assumption (3) 9.9 % 17.7 Decrease in fair value from: 10% adverse change $ 530 1 25% adverse change 1,301 1 Discount rate assumption 8.1 % 14.5 4.3 3.7 Decrease in fair value from: 100 basis point increase $ 615 — 37 14 200 basis point increase 1,176 1 72 28 Cost to service assumption ($ per loan) 106 Decrease in fair value from: 10% adverse change 316 25% adverse change 787 Credit loss assumption 5.1 % — 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) Year ended December 31, December 31, December 31, (in millions) 2018 2017 2018 2017 2018 2017 Commercial: Real estate mortgage $ 105,173 100,875 1,008 2,839 739 1,027 Total commercial 105,173 100,875 1,008 2,839 739 1,027 Consumer: Real estate 1-4 family first mortgage 1,097,128 1,126,208 8,947 13,393 466 735 Total consumer 1,097,128 1,126,208 8,947 13,393 466 735 Total off-balance sheet sold or securitized loans (2) $ 1,202,301 1,227,083 9,955 16,232 1,205 1,762 (1) Includes $675 million and $1.2 billion of commercial foreclosed assets and $582 million and $879 million of consumer foreclosed assets at December 31, 2018 and 2017 , respectively. (2) At December 31, 2018 and 2017 , the table includes total loans of $1.1 trillion at both dates, delinquent loans of $6.4 billion and $9.1 billion , and foreclosed assets of $442 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 December 31, 2018 Secured borrowings: Municipal tender option bond securitizations $ 627 523 (501 ) — 22 Residential mortgage securitizations 95 94 (93 ) — 1 Total secured borrowings 722 617 (594 ) — 23 Consolidated VIEs: Commercial and industrial loans and leases 8,215 8,204 (477 ) (14 ) 7,713 Nonconforming residential mortgage loan securitizations 1,947 1,732 (521 ) — 1,211 Commercial real estate loans 3,957 3,957 — — 3,957 Structured asset finance — — — — — Investment funds 155 155 (5 ) (15 ) 135 Other 14 14 (4 ) (5 ) 5 Total consolidated VIEs 14,288 14,062 (1,007 ) (34 ) 13,021 Total secured borrowings and consolidated VIEs $ 15,010 14,679 (1,601 ) (34 ) 13,044 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)	12 Months Ended
	Dec. 31, 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 Year ended December 31, (in millions) 2018 2017 2016 Fair value, beginning of year $ 13,625 12,959 12,415 Purchases — 541 — Servicing from securitizations or asset transfers (1) 2,010 2,263 2,204 Sales and other (2) (71 ) (23 ) (65 ) Net additions 1,939 2,781 2,139 Changes in fair value: Due to changes in valuation model inputs or assumptions: Mortgage interest rates (3) 1,337 (103 ) 543 Servicing and foreclosure costs (4) 818 96 106 Discount rates (5) (830 ) 13 — Prepayment estimates and other (6) (365 ) (132 ) (84 ) Net changes in valuation model inputs or assumptions 960 (126 ) 565 Changes due to collection/realization of expected cash flows over time (1,875 ) (1,989 ) (2,160 ) Total changes in fair value (915 ) (2,115 ) (1,595 ) Fair value, end of year $ 14,649 13,625 12,959 (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. The amount for the year ended December 31, 2018, reflects updated information obtained regarding market participants’ views of servicing and foreclosure costs. (5) Reflects discount rate assumption change, excluding portion attributable to changes in mortgage interest rates. The amount for the year ended December 31, 2018, reflects updated information obtained regarding market participants’ views of discount 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 Year ended December 31, (in millions) 2018 2017 2016 Balance, beginning of year $ 1,424 1,406 1,308 Purchases 127 115 97 Servicing from securitizations or asset transfers 158 166 270 Amortization (266 ) (263 ) (269 ) Balance, end of year (1) $ 1,443 1,424 1,406 Fair value of amortized MSRs: Beginning of year $ 2,025 1,956 1,680 End of year 2,288 2,025 1,956 (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) Dec 31, 2018 Dec 31, 2017 Residential mortgage servicing: Serviced for others $ 1,164 1,209 Owned loans serviced 334 342 Subserviced for others 4 3 Total residential servicing 1,502 1,554 Commercial mortgage servicing: Serviced for others 543 495 Owned loans serviced 121 127 Subserviced for others 9 9 Total commercial servicing 673 631 Total managed servicing portfolio $ 2,175 2,185 Total serviced for others $ 1,707 1,704 Ratio of MSRs to related loans serviced for others 0.94 % 0.88
Mortgage Banking Noninterest Income	Table 10.4 presents the components of mortgage banking noninterest income. Table 10.4: Mortgage Banking Noninterest Income Year ended December 31, (in millions) 2018 2017 2016 Servicing income, net: Servicing fees: Contractually specified servicing fees $ 3,613 3,603 3,778 Late charges 162 172 180 Ancillary fees 182 199 229 Unreimbursed direct servicing costs (1) (331 ) (582 ) (819 ) Net servicing fees 3,626 3,392 3,368 Changes in fair value of MSRs carried at fair value: Due to changes in valuation model inputs or assumptions (2) (A) 960 (126 ) 565 Changes due to collection/realization of expected cash flows over time (1,875 ) (1,989 ) (2,160 ) Total changes in fair value of MSRs carried at fair value (915 ) (2,115 ) (1,595 ) Amortization (266 ) (263 ) (269 ) Net derivative gains (losses) from economic hedges (3) (B) (1,072 ) 413 261 Total servicing income, net 1,373 1,427 1,765 Net gains on mortgage loan origination/sales activities 1,644 2,923 4,331 Total mortgage banking noninterest income $ 3,017 4,350 6,096 Market-related valuation changes to MSRs, net of hedge results (2)(3) (A)+(B) $ (112 ) 287 826 (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 17 (Derivatives) for additional discussion and detail.

Intangible Assets (Tables)

Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 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 December 31, 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) $ 4,161 (2,718 ) 1,443 3,876 (2,452 ) 1,424 Core deposit intangibles 12,834 (12,834 ) — 12,834 (12,065 ) 769 Customer relationship and other intangibles 3,994 (3,449 ) 545 3,994 (3,153 ) 841 Total amortized intangible assets $ 20,989 (19,001 ) 1,988 20,704 (17,670 ) 3,034 Unamortized intangible assets: MSRs (carried at fair value) (2) $ 14,649 13,625 Goodwill 26,418 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 December 31, 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 Year ended December 31, 2018 (actual) $ 266 769 299 1,334 Estimate for year ended December 31, 2019 $ 260 — 116 376 2020 233 — 97 330 2021 200 — 83 283 2022 178 — 69 247 2023 150 — 59 209 (1) The year ended December 31, 2018 , balance includes $10 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 (2) — (116 ) — (116 ) Reduction in goodwill related to divested businesses and other (2) — (14 ) — (14 ) Goodwill from business combinations — — 24 24 December 31, 2017 (1) $ 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 (9 ) (5 ) — (14 ) December 31, 2018 (1) $ 16,685 8,450 1,283 26,418 (1) At December 31, 2017 , other assets included Goodwill classified as held-for-sale of $13 million related to the sales agreement for Wells Fargo Shareowner Services. At December 31, 2018 , there was no Goodwill classified as held-for-sale in other assets. (2) The prior period has been revised to conform with the current period presentation.

Deposits (Tables)

Deposits (Tables)	12 Months Ended
	Dec. 31, 2018
Deposits [Abstract]
Time Certificates of Deposits and Other Time Deposits	Table 12.1 presents a summary of the time certificates of deposit (CDs) and other time deposits issued by domestic and foreign offices. Table 12.1: Time Certificates of Deposits and Other Time Deposits Dec 31, Dec 31, (in billions) 2018 2017 Total domestic and foreign $ 130.6 128.6 Domestic: $100,000 or more 42.5 52.7 $250,000 or more 37.1 46.9 Foreign: $100,000 or more 4.6 13.4 $250,000 or more 4.6 13.4
Contractual Maturities of CDs and Other Time Deposits	The contractual maturities of these deposits are presented in Table 12.2 . Table 12.2: Contractual Maturities of CDs and Other Time Deposits (in millions) December 31, 2018 2019 $ 88,435 2020 25,986 2021 6,324 2022 3,320 2023 2,868 Thereafter 3,712 Total $ 130,645
Contractual Maturities of Domestic Time Deposits	The contractual maturities of the domestic time deposits with a denomination of $100,000 or more are presented in Table 12.3 . Table 12.3: Contractual Maturities of Domestic Time Deposits (in millions) 2018 Three months or less $ 13,724 After three months through six months 12,292 After six months through twelve months 12,945 After twelve months 3,504 Total $ 42,465

Short-term Borrowings (Tables)

Short-term Borrowings (Tables)	12 Months Ended
	Dec. 31, 2018
Short-term Debt [Abstract]
Short-Term Borrowings	Table 13.1 shows selected information for short-term borrowings, which generally mature in less than 30 days . We pledge certain financial instruments that we own to collateralize repurchase agreements and other securities financings. For additional information, see the “Pledged Assets” section of Note 15 (Guarantees, Pledged Assets and Collateral, and Other Commitments). Table 13.1: Short-Term Borrowings 2018 2017 2016 (in millions) Amount Rate Amount Rate Amount Rate As of December 31, Federal funds purchased and securities sold under agreements to repurchase $ 92,430 2.65 % $ 88,684 1.30 % $ 78,124 0.17 % Commercial paper — — — — 120 0.93 Other short-term borrowings 13,357 1.63 14,572 0.72 18,537 0.28 Total $ 105,787 2.52 $ 103,256 1.22 $ 96,781 0.19 Year ended December 31, Average daily balance Federal funds purchased and securities sold under agreements to repurchase $ 90,348 1.78 $ 82,507 0.90 $ 99,955 0.33 Commercial paper — — 16 0.95 256 0.86 Other short-term borrowings 13,919 0.79 16,399 0.13 14,976 0.02 Total $ 104,267 1.65 $ 98,922 0.77 $ 115,187 0.29 Maximum month-end balance Federal funds purchased and securities sold under agreements to repurchase (1) $ 93,918 N/A $ 91,604 N/A $ 109,645 N/A Commercial paper (2) — N/A 78 N/A 519 N/A Other short-term borrowings (3) 16,924 N/A 19,439 N/A 18,537 N/A N/A- Not applicable (1) Highest month-end balance in each of the last three years was November 2018 , November 2017 and October 2016 . (2) There were no month-end balances in 2018; highest month-end balance in the remaining years was January 2017 and March 2016 . (3) Highest month-end balance in each of the last three years was January 2018 , February 2017 and December 2016 .

Long-term Debt (Tables)

Long-term Debt (Tables)	12 Months Ended
	Dec. 31, 2018
Long-term Debt, Current and Noncurrent [Abstract]
Long-Term Debt	Table 14.1 presents a summary of our long-term debt carrying values, reflecting unamortized debt discounts and premiums, and purchase accounting adjustments, where applicable. The interest rates displayed represent the range of contractual rates in effect at December 31, 2018 . These interest rates do not include the effects of any associated derivatives designated in a hedge accounting relationship. Table 14.1: Long-Term Debt December 31, 2018 2017 (in millions) Maturity date(s) Stated interest rate(s) Wells Fargo & Company (Parent only) Senior Fixed-rate notes (1) 2019-2045 0.38-6.75% $ 77,742 84,652 Floating-rate notes 2019-2048 0.10-4.08% 19,553 22,463 FixFloat notes 2028 3.58% 2,901 2,961 Structured notes (2) 2019-2056 7,984 7,442 Total senior debt - Parent 108,180 117,518 Subordinated Fixed-rate notes (3) 2023-2046 3.45-7.57% 25,428 27,132 Total subordinated debt - Parent 25,428 27,132 Junior subordinated Fixed-rate notes - hybrid trust securities 2029-2036 5.95-7.95% 1,308 1,369 Floating-rate notes 2027 2.94-3.44% 308 299 Total junior subordinated debt - Parent (4) 1,616 1,668 Total long-term debt - Parent (3) 135,224 146,318 Wells Fargo Bank, N.A. and other bank entities (Bank) Senior Fixed-rate notes 2019-2023 1.75-3.63% 14,222 7,732 Floating-rate notes 2019-2053 2.33-3.57% 6,617 4,317 FixFloat notes 2021 3.33% 1,998 — Fixed-rate advances - Federal Home Loan Bank (FHLB) (5) 2019-2031 3.83-7.50% 51 62 Floating-rate advances - FHLB (5) 2019-2021 2.44-3.28% 53,825 47,825 Structured notes (2) 2019-2037 1,646 743 Capital leases 2019-2029 2.87-17.78% 36 39 Total senior debt - Bank 78,395 60,718 Subordinated Fixed-rate notes 2023-2038 5.25-7.74% 5,199 5,408 Total subordinated debt - Bank 5,199 5,408 Junior subordinated Floating-rate notes 2027 3.09-3.19% 352 342 Total junior subordinated debt - Bank (4) 352 342 Long-term debt issued by VIE - Fixed rate (6) 2020-2047 6.00% 160 268 Long-term debt issued by VIE - Floating rate (6) 2020-2047 2.46-13.02% 656 1,211 Mortgage notes and other debt (7) 2019-2057 0.20-9.20% 6,637 7,291 Total long-term debt - Bank 91,399 75,238 (continued on following page) (continued from previous page) December 31, 2018 2017 (in millions) Maturity date(s) Stated interest rate(s) Other consolidated subsidiaries Senior Fixed-rate notes 2019-2023 2.94-3.46% 2,383 3,390 Structured notes (2) 2021-2028 6 1 Total senior debt - Other consolidated subsidiaries 2,389 3,391 Mortgage notes and other (7) 2026 4.08% 32 73 Total long-term debt - Other consolidated subsidiaries 2,421 3,464 Total long-term debt $ 229,044 225,020 (1) Includes $59 million of outstanding zero coupon callable notes at December 31, 2018. (2) Included in the table are certain structured notes that have coupon or repayment terms linked to the performance of debt or equity securities, an embedded equity, commodity, or currency index, or basket of indices accounted for separately from the note as a free-standing derivative, and the maturity may be accelerated based on the value of a referenced index or security. For information on embedded derivatives, see the “Derivatives Not Designated as Hedging Instruments” section in Note 17 (Derivatives). In addition, a major portion consists of zero coupon callable notes where interest is paid as part of the final redemption amount. (3) Includes fixed-rate subordinated notes issued by the Parent at a discount of $131 million and $133 million in 2018 and 2017 , respectively, and debt issuance costs of $2 million in both 2018 and 2017, to effect a modification of Wells Fargo Bank, NA notes. These subordinated notes are carried at their par amount on the balance sheet of the Parent presented in Note 27 (Parent-Only Financial Statements). In addition, Parent long-term debt presented in Note 27 also includes affiliate related issuance costs of $278 million and $323 million in 2018 and 2017, respectively. (4) Represents junior subordinated debentures held by unconsolidated wholly-owned trusts formed for the sole purpose of issuing trust preferred securities. See Note 9 (Securitizations and Variable Interest Entities) for additional information on our trust preferred security structures. (5) At December 31, 2018 and 2017 , FHLB advances were secured by residential loan collateral. (6) For additional information on VIEs, see Note 9 (Securitizations and Variable Interest Entities). (7) A major portion related to securitizations and secured borrowings, see Note 9 (Securitizations and Variable Interest Entities).
Maturity of Long-Term Debt	The aggregate carrying value of long-term debt that matures (based on contractual payment dates) as of December 31, 2018 , in each of the following five years and thereafter is presented in Table 14.2 . Table 14.2: Maturity of Long-Term Debt December 31, 2018 (in millions) 2019 2020 2021 2022 2023 Thereafter Total Wells Fargo & Company (Parent Only) Senior notes $ 6,713 13,459 17,923 17,772 10,932 41,381 108,180 Subordinated notes — — — — 3,544 21,884 25,428 Junior subordinated notes — — — — — 1,616 1,616 Total long-term debt - Parent 6,713 13,459 17,923 17,772 14,476 64,881 135,224 Wells Fargo Bank, N.A. and other bank entities (Bank) Senior notes 36,653 18,498 20,218 40 2,807 179 78,395 Subordinated notes — — — — 1,043 4,156 5,199 Junior subordinated notes — — — — — 352 352 Securitizations and other bank debt 2,084 1,647 574 268 119 2,761 7,453 Total long-term debt - Bank 38,737 20,145 20,792 308 3,969 7,448 91,399 Other consolidated subsidiaries Senior notes 1,097 — 920 — 367 5 2,389 Securitizations and other bank debt — — — — — 32 32 Total long-term debt - Other consolidated subsidiaries 1,097 — 920 — 367 37 2,421 Total long-term debt $ 46,547 33,604 39,635 18,080 18,812 72,366 229,044

Guarantees, Pledged Assets an_2

Guarantees, Pledged Assets and Collateral, and Other Commitments (Tables)	12 Months Ended
	Dec. 31, 2018
Guarantees [Abstract]
Guarantees - Carrying Value and Maximum Exposure to Loss	Table 15.1 shows carrying value, maximum exposure to loss on our guarantees and the related non-investment grade amounts. Table 15.1: 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 December 31, 2018 Standby letters of credit (1) $ 40 14,636 7,897 3,398 497 26,428 8,027 Securities lending and other indemnifications (2) — — 1 — 1,044 1,045 1 Written put options (3) (185 ) 17,243 10,502 3,066 400 31,211 21,732 Loans and MLHFS sold with recourse (4) 54 104 653 1,207 10,163 12,127 9,079 Factoring guarantees — 889 — — — 889 751 Other guarantees 1 — — 3 2,959 2,962 1 Total guarantees $ (90 ) 32,872 19,053 7,674 15,063 74,662 39,591 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 — 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 $7.5 billion and $8.1 billion at December 31, 2018 and 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 $70 million and $92 million with related collateral of $974 million and $717 million at December 31, 2018 and 2017 , respectively. Estimated maximum exposure to loss was $1.0 billion at December 31, 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 17 (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 $3 million and $5 million of loans associated with these agreements during 2018 and 2017 , respectively.
Significant Components of Assets Pledged	Table 15.2 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 $14.1 billion and $13.6 billion at December 31, 2018 and 2017 , respectively, which can only be used to settle the liabilities of those entities. The table also excludes $617 million and $675 million in assets pledged in transactions with VIE’s accounted for as secured borrowings at December 31, 2018 and 2017 , respectively. See Note 9 (Securitizations and Variable Interest Entities) for additional information on consolidated VIE assets and secured borrowings. Table 15.2: Pledged Assets Dec 31, Dec 31, (in millions) 2018 2017 Held for trading: Debt securities $ 96,616 96,993 Equity securities 9,695 12,161 Total pledged assets held for trading (1) 106,311 109,154 Not held for trading: Debt securities and other (2) 62,438 73,592 Mortgage loans held for sale and loans (3) 453,894 469,554 Total pledged assets not held for trading 516,332 543,146 Total pledged assets $ 622,643 652,300 (1) Consists of pledged assets held for trading of $45.5 billion and $41.9 billion at December 31, 2018 and 2017 , respectively, and off-balance sheet securities of $60.8 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 $106.2 billion and $109.0 billion at December 31, 2018 and 2017 , respectively, that permit the secured parties to sell or repledge the collateral. (2) Includes carrying value of $4.2 billion and $5.0 billion (fair value of $4.1 billion and $5.0 billion ) in collateral for repurchase agreements at December 31, 2018 and 2017 , respectively, which are pledged under agreements that do not permit the secured parties to sell or repledge the collateral. Also includes $68 million and $64 million in collateral pledged under repurchase agreements at December 31, 2018 and 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 $ 7.4 billion and $2.6 billion at December 31, 2018 and 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 $1.2 billion and $2.2 billion at December 31, 2018 and 2017 , respectively, of pledged loans recorded on our balance sheet representing certain delinquent loans that are eligible for repurchase from GNMA loan securitizations.
Offsetting of Resale and Repurchase Agreements and Securities Borrowing and Lending	Table 15.3 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 15.3 , we also have balance sheet netting related to derivatives that is disclosed in Note 17 (Derivatives). Table 15.3: Offsetting – Securities Financing Activities Dec 31, Dec 31, (in millions) 2018 2017 Assets: Resale and securities borrowing agreements Gross amounts recognized $ 112,662 121,135 Gross amounts offset in consolidated balance sheet (1) (15,258 ) (23,188 ) Net amounts in consolidated balance sheet (2) 97,404 97,947 Collateral not recognized in consolidated balance sheet (3) (96,734 ) (96,829 ) Net amount (4) $ 670 1,118 Liabilities: Repurchase and securities lending agreements Gross amounts recognized (5) $ 106,248 111,488 Gross amounts offset in consolidated balance sheet (1) (15,258 ) (23,188 ) Net amounts in consolidated balance sheet (6) 90,990 88,300 Collateral pledged but not netted in consolidated balance sheet (7) (90,798 ) (87,918 ) Net amount (8) $ 192 382 (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 December 31, 2018 and 2017 , includes $80.1 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 $17.3 billion and $19.0 billion , at December 31, 2018 and 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 December 31, 2018 and 2017 , we have received total collateral with a fair value of $123.1 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 $60.8 billion at December 31, 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 December 31, 2018 and 2017 , we have pledged total collateral with a fair value of $108.8 billion and $113.6 billion , respectively, of which, the counterparty does not have the right to sell or repledge $4.4 billion as of December 31, 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 and Contractual Maturities of Repurchase Agreements and Securities Lending Agreements	Table 15.4 provides the underlying collateral types of our gross obligations under repurchase and securities lending agreements. Table 15.4: Underlying Collateral Types of Gross Obligations Dec 31, Dec 31, (in millions) 2018 2017 Repurchase agreements: Securities of U.S. Treasury and federal agencies (1) $ 38,408 40,507 Securities of U.S. States and political subdivisions 159 92 Federal agency mortgage-backed securities (1) 47,241 45,336 Non-agency mortgage-backed securities 1,875 1,324 Corporate debt securities (1) 6,191 8,020 Asset-backed securities 2,074 2,034 Equity securities 992 838 Other (1) 340 1,602 Total repurchases 97,280 99,753 Securities lending: Securities of U.S. Treasury and federal agencies 222 186 Federal agency mortgage-backed securities 2 — Corporate debt securities 389 619 Equity securities (2) 8,349 10,930 Other 6 — Total securities lending 8,968 11,735 Total repurchases and securities lending $ 106,248 111,488 (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 15.5 provides the contractual maturities of our gross obligations under repurchase and securities lending agreements. Table 15.5: Contractual Maturities of Gross Obligations (in millions) Overnight/continuous Up to 30 days 30-90 days >90 days Total gross obligation December 31, 2018 Repurchase agreements $ 86,574 3,244 2,153 5,309 97,280 Securities lending 8,669 — 299 — 8,968 Total repurchases and securities lending (1) $ 95,243 3,244 2,452 5,309 106,248 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)	12 Months Ended
	Dec. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Notional or Contractual Amounts and Fair Values of Derivatives	Table 17.1 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 17.1: Notional or Contractual Amounts and Fair Values of Derivatives December 31, 2018 December 31, 2017 Notional or Fair value Notional or Fair value contractual Asset Liability contractual Asset Liability (in millions) amount derivatives derivatives amount derivatives derivatives Derivatives designated as hedging instruments Interest rate contracts (1) $ 177,511 2,237 636 209,677 2,492 1,092 Foreign exchange contracts (1) 34,176 573 1,376 34,135 1,482 1,137 Total derivatives designated as qualifying hedging instruments 2,810 2,012 3,974 2,229 Derivatives not designated as hedging instruments Economic hedges: Interest rate contracts (2) 173,215 849 369 220,558 159 201 Equity contracts 13,920 1,362 79 12,315 716 138 Foreign exchange contracts 19,521 225 80 15,976 78 309 Credit contracts - protection purchased 100 27 — 111 37 — Subtotal 2,463 528 990 648 Customer accommodation trading and other derivatives: Interest rate contracts 9,162,821 15,349 15,303 6,434,673 14,979 14,179 Commodity contracts 66,173 1,588 2,336 62,530 2,354 1,335 Equity contracts 217,890 6,183 5,931 213,750 6,291 8,363 Foreign exchange contracts 364,982 5,916 5,657 362,896 7,413 7,122 Credit contracts - protection sold 11,741 76 182 9,021 147 214 Credit contracts - protection purchased 20,880 175 98 17,406 207 208 Subtotal 29,287 29,507 31,391 31,421 Total derivatives not designated as hedging instruments 31,750 30,035 32,381 32,069 Total derivatives before netting 34,560 32,047 36,355 34,298 Netting (3) (23,790 ) (23,548 ) (24,127 ) (25,502 ) Total $ 10,770 8,499 12,228 8,796 (1) Notional amounts presented at December 31, 2017, exclude $500 million of interest rate contracts for certain derivatives that are combined for designation as a hedge in a single relationship. No such hedging relationships existed at December 31, 2018. The notional amount for foreign exchange contracts at December 31, 2018 and 2017 , excludes $11.2 billion and $13.5 billion , respectively for certain derivatives that are combined for designation as a hedge on a single relationship. (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 the next table in this Note for further information.
Gross Fair Values of Derivative Assets and Liabilities	Table 17.2 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 $30.9 billion and $28.4 billion of gross derivative assets and liabilities, respectively, at December 31, 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 $3.7 billion and $3.6 billion , respectively, at December 31, 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 17.2 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 15 (Guarantees, Pledged Assets and Collateral, and Other Commitments). Table 17.2: 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) December 31, 2018 Derivative assets Interest rate contracts $ 18,435 (12,029 ) 6,406 (80 ) 6,326 90 % Commodity contracts 1,588 (849 ) 739 (4 ) 735 57 Equity contracts 7,545 (5,318 ) 2,227 (755 ) 1,472 78 Foreign exchange contracts 6,714 (5,355 ) 1,359 (35 ) 1,324 100 Credit contracts-protection sold 76 (73 ) 3 — 3 12 Credit contracts-protection purchased 202 (166 ) 36 (1 ) 35 78 Total derivative assets $ 34,560 (23,790 ) 10,770 (875 ) 9,895 Derivative liabilities Interest rate contracts $ 16,308 (13,152 ) 3,156 (567 ) 2,589 92 % Commodity contracts 2,336 (727 ) 1,609 (8 ) 1,601 85 Equity contracts 6,010 (3,877 ) 2,133 (110 ) 2,023 75 Foreign exchange contracts 7,113 (5,522 ) 1,591 (188 ) 1,403 100 Credit contracts-protection sold 182 (180 ) 2 (2 ) — 67 Credit contracts-protection purchased 98 (90 ) 8 — 8 11 Total derivative liabilities $ 32,047 (23,548 ) 8,499 (875 ) 7,624 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 $353 million and $245 million related to derivative assets and $152 million and $95 million related to derivative liabilities as of December 31, 2018 and 2017 , respectively. Cash collateral totaled $3.7 billion and $3.6 billion , netted against derivative assets and liabilities, respectively, at December 31, 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 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 17.3 shows the net gains (losses) related to derivatives in fair value and cash flow hedging relationships. Table 17.3: Gains (Losses) Recognized in Consolidated Statement of Income on Fair Value and Cash Flow Hedging Relationships (1) Net interest income Noninterest Income (in millions) Debt securities Loans Mortgage loans held for sale Deposits Long-term debt Other Total Year ended December 31, 2018 Total amounts presented in the consolidated statement of income $ 14,406 43,974 777 (5,622 ) (6,703 ) 2,473 49,305 Gains (losses) on fair value hedging relationships Interest rate contracts Amounts related to interest settlements on derivatives (2) (187 ) — (3 ) (41 ) 292 — 61 Recognized on derivatives 845 1 15 27 (1,923 ) — (1,035 ) Recognized on hedged items (877 ) (1 ) (22 ) (33 ) 1,843 — 910 Foreign exchange contracts Amounts related to interest settlements on derivatives (2)(3) 33 — — — (434 ) — (401 ) Recognized on derivatives (4) 7 — — — 135 (1,204 ) (1,062 ) Recognized on hedged items (1 ) — — — (82 ) 1,114 1,031 Net income (expense) recognized on fair value hedges (180 ) — (10 ) (47 ) (169 ) (90 ) (496 ) Gains (losses) on cash flow hedging relationships Interest contracts Realized gains (losses) (pre tax) reclassified from cumulative OCI into net income (5) — (292 ) — — 1 — (291 ) Foreign exchange contracts Realized gains (losses) (pre-tax) reclassified from cumulative OCI into net income (5) — — — — (3 ) — (3 ) Net income (expense) recognized on cash flow hedges $ — (292 ) — — (2 ) — (294 ) (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 Year ended December 31, 2017 Total amounts presented in the consolidated statement of income $ 12,946 41,388 786 (3,013 ) (5,157 ) 1,603 48,553 Gains (losses) on fair value hedging relationships Interest rate contracts Amounts related to interest settlements on derivatives (2) (469 ) (1 ) (5 ) 36 1,286 — 847 Recognized on derivatives (43 ) 1 (5 ) (20 ) (912 ) — (979 ) Recognized on hedged items (52 ) (1 ) (4 ) 36 938 — 917 Foreign exchange contracts Amounts related to interest settlements on derivatives (2)(3) 14 — — — (210 ) — (196 ) Recognized on derivatives (4) 13 — — — (230 ) 3,118 2,901 Recognized on hedged items (10 ) — — — 255 (2,855 ) (2,610 ) Net income (expense) recognized on fair value hedges (547 ) (1 ) (14 ) 52 1,127 263 880 Gains (losses) on cash flow hedging relationships Interest contracts Realized gains (losses) (pre tax) reclassified from cumulative OCI into net income (5) — 551 — — (8 ) — 543 Foreign exchange contracts Realized gains (losses) (pre-tax) reclassified from cumulative OCI into net income (5) — — — — — — — Net income (expense) recognized on cash flow hedges $ — 551 — — (8 ) — 543 Year ended December 31, 2016 Total amounts presented in the consolidated statement of income $ 11,244 39,505 784 (1,395 ) (3,830 ) 1,289 47,597 Gains (losses) on fair value hedging relationships Interest rate contracts Amounts related to interest settlements on derivatives (2) (582 ) — (6 ) 62 1,830 — 1,304 Recognized on derivatives — — — — — (2,175 ) (2,175 ) Recognized on hedged items — — — — — 2,157 2,157 Foreign exchange contracts Amounts related to interest settlements on derivatives (2)(3) 9 — — — 31 — 40 Recognized on derivatives — — — — — (274 ) (274 ) Recognized on hedged items — — — — — 286 286 Net income (expense) recognized on fair value hedges (573 ) — (6 ) 62 1,861 (6 ) 1,338 Gains (losses) on cash flow hedging relationships Interest contracts Realized gains (losses) (pre tax) reclassified from cumulative OCI into net income (5) — 1,043 — — (14 ) — 1,029 Gains (losses) (before tax) recognized in income for hedge ineffectiveness — — — — — (1 ) (1 ) Foreign exchange contracts Realized gains (losses) (pre-tax) reclassified from cumulative OCI into net income (5) — — — — — — — Net income (expense) recognized on cash flow hedges $ — 1,043 — — (14 ) (1 ) 1,028 (1) Year ended December 31, 2016, gain or loss amounts and presentation location were not conformed to new hedge accounting guidance that we adopted in 2017. (2) Includes changes in fair value due to the passage of time associated with the non-zero fair value amount at hedge inception . (3) Includes $(2) million , $(3) million and $(13) million for years ended December 31, 2018 , 2017 , and 2016 , respectively, of the time value component recognized as net interest income (expense) on forward derivatives hedging foreign currency available-for-sale securities and long-term debt that were excluded from the assessment of hedge effectiveness. (4) 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 25 (Other Comprehensive Income) for the amounts recognized in other comprehensive income. (5) See Note 25 (Other Comprehensive Income) for details of amounts reclassified to net income.
Hedged Items in Fair Value Hedging Relationships	Table 17.4 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 17.4: 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 December 31, 2018 Available-for-sale debt securities (5) $ 37,857 (157 ) 4,938 238 Loans — — — — Mortgage loans held for sale 448 7 — — Deposits (56,535 ) 115 — — Long-term debt (104,341 ) (742 ) (25,539 ) 366 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 $1.6 billion and for long-term debt is $(6.3) billion as of December 31, 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 $1.4 billion and $66 million of debt securities and long-term debt cumulative basis adjustments as of December 31, 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 17.5 shows the net gains (losses), recognized by income statement lines, related to derivatives not designated as hedging instruments. Table 17.5: 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 Year ended December 31, 2018 Net gains (losses) recognized on economic hedges derivatives: Interest rate contracts (1) $ (215 ) — — (15 ) (230 ) Equity contracts — (408 ) — 4 (404 ) Foreign exchange contracts — — — 669 669 Credit contracts — — — — — Subtotal (2) (215 ) (408 ) — 658 35 Net gains (losses) recognized on customer accommodation trading and other derivatives: Interest rate contracts (3) (352 ) — 446 — 94 Equity contracts — — 4,499 (403 ) 4,096 Foreign exchange contracts — — 638 — 638 Credit contracts — — 1 — 1 Commodity contracts — — 83 — 83 Other — — — — — Subtotal (352 ) — 5,667 (403 ) 4,912 Net gains (losses) recognized related to derivatives not designated as hedging instruments $ (567 ) (408 ) 5,667 255 4,947 (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 Year ended December 31, 2017 Net gains (losses) recognized on economic hedges derivatives: Interest rate contracts (1) $ 448 — — (75 ) 373 Equity contracts — (1,483 ) — 17 (1,466 ) Foreign exchange contracts — — — (866 ) (866 ) Credit contracts — — — 5 5 Subtotal (2) 448 (1,483 ) — (919 ) (1,954 ) Net gains (losses) recognized on customer accommodation trading and other derivatives: Interest rate contracts (3) 614 — 160 — 774 Equity contracts — — (3,932 ) 1 (3,931 ) Foreign exchange contracts — — 638 — 638 Credit contracts — — (81 ) — (81 ) Commodity contracts — — 178 — 178 Other — — — — — Subtotal 614 — (3,037 ) 1 (2,422 ) Net gains (losses) recognized related to derivatives not designated as hedging instruments $ 1,062 (1,483 ) (3,037 ) (918 ) (4,376 ) Year ended December 31, 2016 Net gains (losses) recognized on economic hedges derivatives: Interest rate contracts (1) $ 1,029 — — (51 ) 978 Equity contracts — 125 — (11 ) 114 Foreign exchange contracts — — — 954 954 Credit contracts — — — 21 21 Subtotal (2) 1,029 125 — 913 2,067 Net gains (losses) recognized on customer accommodation trading and other derivatives: Interest contracts (3) 818 — 255 — 1,073 Equity contracts — — (1,643 ) — (1,643 ) Foreign exchange contracts — — 1,077 — 1,077 Credit contracts — — (105 ) — (105 ) Commodity contracts — — 216 — 216 Other — — 11 — 11 Subtotal 818 — (189 ) — 629 Net gains (losses) recognized related to derivatives not designated as hedging instruments $ 1,847 125 (189 ) 913 2,696 (1) Includes gains (losses) on the derivatives used as economic hedges of MSRs measured at fair value, derivative loan commitments and mortgages held for sale. (2) Includes hedging gains (losses) of $9 million , $(71) million , and $(8) million for the years ended December 31, 2018 , 2017 , and 2016 , respectively, which partially offset hedge accounting ineffectiveness. (3) Amounts presented in mortgage banking noninterest income are gains (losses) on derivative loan commitments.
Sold and Purchased Credit Derivatives	Table 17.6 provides details of sold and purchased credit derivatives. Table 17.6: 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 December 31, 2018 Credit default swaps on: Corporate bonds $ 59 2,037 441 1,374 663 1,460 2019 - 2027 Structured products 62 133 128 121 12 113 2022 - 2047 Credit protection on: Default swap index 1 3,618 582 1,998 1,620 2,896 2019 - 2028 Commercial mortgage-backed securities index 49 389 109 363 26 51 2047 - 2058 Asset-backed securities index 9 42 42 42 — 1 2045 - 2046 Other 2 5,522 5,327 — 5,522 12,561 2018 - 2048 Total credit derivatives $ 182 11,741 6,629 3,898 7,843 17,082 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)	12 Months Ended
	Dec. 31, 2018
Fair Value Disclosures [Abstract]
Fair Value, Measurements from Brokers or Third Party Pricing Services	Table 18.1 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 18.1 . Table 18.1: 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 December 31, 2018 Trading debt securities $ — — — 899 256 — Available-for-sale debt securities: Securities of U.S. Treasury and federal agencies — — — 10,399 2,949 — Securities of U.S. states and political subdivisions — — — — 48,377 43 Mortgage-backed securities — — — — 160,162 41 Other debt securities (1) — 45 129 — 44,292 758 Total available-for-sale debt securities — 45 129 10,399 255,780 842 Equity securities: Marketable — — — — 158 — Nonmarketable — — — — 1 — Total equity securities — — — — 159 — Derivative assets — — — 17 — — Derivative liabilities — — — (12 ) — — 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 18.2 presents the balances of assets and liabilities recorded at fair value on a recurring basis. Table 18.2: Fair Value on a Recurring Basis (in millions) Level 1 Level 2 Level 3 Netting Total December 31, 2018 Trading debt securities: Securities of U.S. Treasury and federal agencies $ 20,525 2,892 — — 23,417 Securities of U.S. states and political subdivisions — 3,272 3 — 3,275 Collateralized loan obligations — 673 237 — 910 Corporate debt securities — 10,723 34 — 10,757 Mortgage-backed securities — 30,715 — — 30,715 Asset-backed securities — 893 — — 893 Other trading debt securities — 6 16 — 22 Total trading debt securities 20,525 49,174 290 — 69,989 Available-for-sale debt securities: Securities of U.S. Treasury and federal agencies 10,399 2,949 — — 13,348 Securities of U.S. states and political subdivisions — 48,820 444 — 49,264 Mortgage-backed securities: Federal agencies — 153,203 — — 153,203 Residential — 2,775 — — 2,775 Commercial — 4,184 41 — 4,225 Total mortgage-backed securities — 160,162 41 — 160,203 Corporate debt securities 34 5,867 370 — 6,271 Collateralized loan and other debt obligations (1) — 34,543 800 — 35,343 Asset-backed securities: Automobile loans and leases — 925 — — 925 Home equity loans — 112 — — 112 Other asset-backed securities — 4,056 389 — 4,445 Total asset-backed securities — 5,093 389 — 5,482 Other debt securities — 1 — — 1 Total available-for-sale debt securities 10,433 257,435 2,044 (2) — 269,912 Mortgage loans held for sale — 10,774 997 — 11,771 Loans held for sale — 1,409 60 — 1,469 Loans — — 244 — 244 Mortgage servicing rights (residential) — — 14,649 — 14,649 Derivative assets: Interest rate contracts 46 18,294 95 — 18,435 Commodity contracts — 1,535 53 — 1,588 Equity contracts 1,648 4,582 1,315 — 7,545 Foreign exchange contracts 17 6,689 8 — 6,714 Credit contracts — 179 99 — 278 Netting — — — (23,790 ) (3) (23,790 ) Total derivative assets 1,711 31,279 1,570 (23,790 ) 10,770 Equity securities - excluding securities at NAV: Marketable 23,205 757 — — 23,962 Nonmarketable — 24 5,468 — 5,492 Total equity securities 23,205 781 5,468 — 29,454 Total assets included in the fair value hierarchy $ 55,874 350,852 25,322 (23,790 ) 408,258 Equity securities at NAV (4) 102 Total assets recorded at fair value 408,360 Derivative liabilities: Interest rate contracts $ (21 ) (16,217 ) (70 ) — (16,308 ) Commodity contracts — (2,287 ) (49 ) — (2,336 ) Equity contracts (1,492 ) (3,186 ) (1,332 ) — (6,010 ) Foreign exchange contracts (12 ) (7,067 ) (34 ) — (7,113 ) Credit contracts — (216 ) (64 ) — (280 ) Netting — — — 23,548 (3) 23,548 Total derivative liabilities (1,525 ) (28,973 ) (1,549 ) 23,548 (8,499 ) Short sale liabilities: Securities of U.S. Treasury and federal agencies (11,850 ) (411 ) — — (12,261 ) Mortgage-backed securities — (47 ) — (47 ) Corporate debt securities — (4,505 ) — — (4,505 ) Equity securities (2,902 ) (2 ) — — (2,904 ) Other securities — (3 ) — — (3 ) Total short sale liabilities (14,752 ) (4,968 ) — — (19,720 ) Other liabilities — — (2 ) — (2 ) Total liabilities recorded at fair value $ (16,277 ) (33,941 ) (1,551 ) 23,548 (28,221 ) (1) Includes collateralized debt obligations of $800 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 17 (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 ) Mortgage-backed securities — — — — — 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 17 (Derivatives) for additional information. (4) Consists of certain nonmarketable equity investments 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	The changes in Level 3 assets and liabilities measured at fair value on a recurring basis for the year ended December 31, 2018 , are presented in Table 18.3 . Table 18.3: Changes in Level 3 Fair Value Assets and Liabilities on a Recurring Basis – 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) Year ended December 31, 2018 Trading debt securities: Securities of U.S. states and political subdivisions $ 3 — — — — — 3 — Collateralized loan obligations 354 (12 ) — (101 ) — (4 ) 237 (14 ) Corporate debt securities 31 (1 ) — 16 — (12 ) 34 (1 ) Other trading debt securities 19 (3 ) — — — — 16 — Total trading debt securities 407 (16 ) — (85 ) — (16 ) 290 (15 ) (5) Available-for-sale debt securities: Securities of U.S. states and political subdivisions 925 8 (8 ) (137 ) — (344 ) 444 — Mortgage-backed securities: Residential 1 — — (1 ) — — — — Commercial 75 — (1 ) (33 ) — — 41 (1 ) Total mortgage-backed securities 76 — (1 ) (34 ) — — 41 (1 ) Corporate debt securities 407 4 (3 ) (38 ) — — 370 — Collateralized loan and other debt obligations 1,020 72 5 (297 ) — — 800 — Asset-backed securities: Other asset-backed securities 566 5 (11 ) (171 ) — — 389 (3 ) Total asset-backed securities 566 5 (11 ) (171 ) — — 389 (3 ) Total available-for-sale debt securities 2,994 89 (18 ) (677 ) — (344 ) 2,044 (4 ) (6) Mortgage loans held for sale 998 (27 ) — (36 ) 72 (10 ) 997 (22 ) (7) Loans held for sale 14 2 — (36 ) 80 — 60 1 Loans 376 (1 ) — (131 ) — — 244 (11 ) (7) Mortgage servicing rights (residential) (8) 13,625 (915 ) — 1,939 — — 14,649 960 (7) Net derivative assets and liabilities: Interest rate contracts 71 (397 ) — 351 — — 25 (42 ) Commodity contracts 19 3 — (11 ) (7 ) — 4 (1 ) Equity contracts (511 ) (108 ) — 522 (1 ) 81 (17 ) (169 ) Foreign exchange contracts 7 (42 ) — 9 — — (26 ) (26 ) Credit contracts 36 5 — (6 ) — — 35 (1 ) Other derivative contracts — — — — — — — — Total derivative contracts (378 ) (539 ) — 865 (8 ) 81 21 (239 ) (9) Equity securities: Marketable — — — — — — — — Nonmarketable (10) 5,203 703 — (450 ) 16 (4 ) 5,468 642 Total equity securities 5,203 703 — (450 ) 16 (4 ) 5,468 642 (11) Short sale liabilities — — — — — — — — (5) Other liabilities (3 ) 1 — — — — (2 ) — (7) (1) See Table 18.4 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) Beginning balance includes $382 million of auction rate securities, which changed from the cost to fair value method of accounting in connection with our adoption of ASU 2016-01 in first quarter 2018. (11) Included in net gains (losses) from equity securities in the income statement. The changes in Level 3 assets and liabilities measured at fair value on a recurring basis for the year ended December 31, 2016 , are presented in Table 18.7 . Table 18.7: Changes in Level 3 Fair Value Assets and Liabilities on a Recurring Basis – 2016 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) Year ended December 31, 2016 Trading debt securities: Securities of U.S. states and $ 8 — — (5 ) — — 3 — Collateralized loan obligations 343 (38 ) — 15 — (11 ) 309 (42 ) Corporate debt securities 56 (7 ) — (13 ) — (2 ) 34 — Other trading debt securities 34 (6 ) — (1 ) 1 — 28 1 Total trading debt securities 441 (51 ) — (4 ) 1 (13 ) 374 (41 ) (5) Available-for-sale debt securities: Securities of U.S. states and 1,500 6 (25 ) 60 80 (481 ) 1,140 — Mortgage-backed securities: Residential 1 — — — — — 1 — Commercial 73 — 1 17 — — 91 (1 ) Total mortgage-backed securities 74 — 1 17 — — 92 (1 ) Corporate debt securities 405 21 35 (29 ) — — 432 (2 ) Collateralized loan and other 565 50 (1 ) 265 — — 879 — Asset-backed securities: Other asset-backed securities 1,182 2 (8 ) (214 ) — — 962 (4 ) Total asset-backed securities 1,182 2 (8 ) (214 ) — — 962 (4 ) Total available-for-sale debt securities 3,726 79 2 99 80 (481 ) 3,505 (7 ) (6) Mortgage loans held for sale 1,082 (19 ) — (159 ) 98 (17 ) 985 (24 ) (7) Loans held for sale — — — — — — — — Loans 5,316 (59 ) — (4,499 ) — — 758 (24 ) (7) Mortgage servicing rights (residential) (8) 12,415 (1,595 ) — 2,139 — — 12,959 565 (7) Net derivative assets and liabilities: Interest rate contracts 288 843 — (1,003 ) — (7 ) 121 170 Commodity contracts 12 10 — (2 ) 4 (1 ) 23 11 Equity contracts (111 ) (80 ) — (156 ) 21 59 (267 ) (176 ) Foreign exchange contracts — (3 ) — (1 ) 16 — 12 (4 ) Credit contracts (3 ) 31 — 49 — — 77 26 Other derivative contracts (58 ) 11 — — — — (47 ) 11 Total derivative contracts 128 812 — (1,113 ) 41 51 (81 ) 38 (9) Equity securities: Marketable — — — (1 ) 1 — — — Nonmarketable 3,065 (30 ) — 224 — — 3,259 (30 ) Total equity securities 3,065 (30 ) — 223 1 — 3,259 (30 ) (10) Short sale liabilities — — — — — — — — (5) Other liabilities (30 ) 1 — 25 — — (4 ) — (7) (1) See Table 18.8 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) Included in net gains (losses) from equity securities in the income statement The changes in Level 3 assets and liabilities measured at fair value on a recurring basis for the year ended December 31, 2017 , are presented in Table 18.5 . Table 18.5: Changes in Level 3 Fair Value Assets and Liabilities on a Recurring Basis – 2017 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) Year ended December 31, 2017 Trading debt securities: Securities of U.S. states and $ 3 — — — — — 3 — Collateralized loan obligations 309 3 — 42 — — 354 (13 ) Corporate debt securities 34 2 — (7 ) 6 (4 ) 31 2 Other trading debt securities 28 (9 ) — — — — 19 (4 ) Total trading debt securities 374 (4 ) — 35 6 (4 ) 407 (15 ) (5) Available-for-sale debt securities: Securities of U.S. states and 1,140 4 5 1,105 5 (1,334 ) 925 — Mortgage-backed securities: Residential 1 — — — — — 1 — Commercial 91 (4 ) — (12 ) — — 75 (11 ) Total mortgage-backed securities 92 (4 ) — (12 ) — — 76 (11 ) Corporate debt securities 432 (1 ) 23 (47 ) — — 407 — Collateralized loan and other 879 22 103 16 — — 1,020 — Asset-backed securities: Other asset-backed securities 962 1 3 (400 ) — — 566 — Total asset-backed securities 962 1 3 (400 ) — — 566 — Total available-for-sale debt securities 3,505 22 134 662 5 (1,334 ) 2,994 (11 ) (6) Mortgage loans held for sale 985 (36 ) — (75 ) 134 (10 ) 998 (34 ) (7) Loans held for sale — 1 — (3 ) 34 (18 ) 14 — Loans 758 (6 ) — (376 ) — — 376 (12 ) (7) Mortgage servicing rights (residential) (8) 12,959 (2,115 ) — 2,781 — — 13,625 (126 ) (7) Net derivative assets and liabilities: Interest rate contracts 121 604 — (654 ) — — 71 (52 ) Commodity contracts 23 (17 ) — 13 2 (2 ) 19 15 Equity contracts (267 ) (199 ) — (37 ) (53 ) 45 (511 ) (259 ) Foreign exchange contracts 12 (5 ) — — — — 7 6 Credit contracts 77 24 — (65 ) — — 36 (62 ) Other derivative contracts (47 ) 27 — 20 — — — — Total derivative contracts (81 ) 434 — (723 ) (51 ) 43 (378 ) (352 ) (9) Equity securities: Marketable — — — — — — — — Nonmarketable 3,259 1,563 — (2 ) 1 — 4,821 1,569 Total equity securities 3,259 1,563 — (2 ) 1 — 4,821 1,569 (10) Short sale liabilities — — — — — — — — (5) Other liabilities (4 ) 1 — — — — (3 ) — (7) (1) See Table 18.6 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.
Fair Value, Assets and Liabilities Measured on Recurring Basis, Level 3 Reconciliation Detail	Table 18.6 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 year ended December 31, 2017 . Table 18.6: Gross Purchases, Sales, Issuances and Settlements – Level 3 – 2017 (in millions) Purchases Sales Issuances Settlements Net Year ended December 31, 2017 Trading debt securities: Securities of U.S. states and political subdivisions $ 37 (36 ) — (1 ) — Collateralized loan obligations 439 (250 ) — (147 ) 42 Corporate debt securities 25 (32 ) — — (7 ) Other trading debt securities — — — — — Total trading debt securities 501 (318 ) — (148 ) 35 Available-for-sale debt securities: Securities of U.S. states and political subdivisions — (68 ) 1,369 (196 ) 1,105 Mortgage-backed securities: Residential — — — — — Commercial — — — (12 ) (12 ) Total mortgage-backed securities — — — (12 ) (12 ) Corporate debt securities 14 (4 ) — (57 ) (47 ) Collateralized loan and other debt obligations 135 — — (119 ) 16 Asset-backed securities: Other asset-backed securities — — 211 (611 ) (400 ) Total asset-backed securities — — 211 (611 ) (400 ) Total available-for-sale debt securities 149 (72 ) 1,580 (995 ) 662 Mortgage loans held for sale 79 (485 ) 489 (158 ) (75 ) Loans held for sale — (2 ) — (1 ) (3 ) Loans 6 (129 ) 19 (272 ) (376 ) Mortgage servicing rights (residential) (1) 541 (24 ) 2,263 1 2,781 Net derivative assets and liabilities: Interest rate contracts — — — (654 ) (654 ) Commodity contracts — — — 13 13 Equity contracts — (118 ) — 81 (37 ) Foreign exchange contracts — — — — — Credit contracts 6 (3 ) — (68 ) (65 ) Other derivative contracts — — — 20 20 Total derivative contracts 6 (121 ) — (608 ) (723 ) Equity securities: Marketable — — — — — Nonmarketable — (2 ) — — (2 ) Total equity securities — (2 ) — — (2 ) Short sale liabilities 3 (3 ) — — — Other liabilities — — — — — (1) For more information on the changes in mortgage servicing rights, see Note 10 (Mortgage Banking Activities). Table 18.8 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 year ended December 31, 2016 . Table 18.8: Gross Purchases, Sales, Issuances and Settlements – Level 3 – 2016 (in millions) Purchases Sales Issuances Settlements Net Year ended December 31, 2016 Trading debt securities: Securities of U.S. states and political subdivisions $ 2 (2 ) — (5 ) (5 ) Collateralized loan obligations 372 (357 ) — — 15 Corporate debt securities 37 (50 ) — — (13 ) Other trading debt securities — (1 ) — — (1 ) Total trading debt securities 411 (410 ) — (5 ) (4 ) Available-for-sale debt securities: Securities of U.S. states and political subdivisions 28 (24 ) 547 (491 ) 60 Mortgage-backed securities: Residential — — — — — Commercial 22 — — (5 ) 17 Total mortgage-backed securities 22 — — (5 ) 17 Corporate debt securities 36 (12 ) — (53 ) (29 ) Collateralized loan and other debt obligations 618 (54 ) — (299 ) 265 Asset-backed securities: Other asset-backed securities 50 (28 ) 235 (471 ) (214 ) Total asset-backed securities 50 (28 ) 235 (471 ) (214 ) Total available-for-sale debt securities 754 (118 ) 782 (1,319 ) 99 Mortgage loans held for sale 87 (618 ) 565 (193 ) (159 ) Loans held for sale — — — — — Loans 21 (3,791 ) 302 (1,031 ) (4,499 ) Mortgage servicing rights (residential) (1) — (66 ) 2,204 1 2,139 Net derivative assets and liabilities: Interest rate contracts — — — (1,003 ) (1,003 ) Commodity contracts — — — (2 ) (2 ) Equity contracts 29 (147 ) — (38 ) (156 ) Foreign exchange contracts — — — (1 ) (1 ) Credit contracts 7 (4 ) — 46 49 Other derivative contracts — — — — — Total derivative contracts 36 (151 ) — (998 ) (1,113 ) Equity securities: Marketable — (1 ) — — (1 ) Nonmarketable 225 — — (1 ) 224 Total equity securities 225 (1 ) — (1 ) 223 Short sale liabilities — — — — — Other liabilities — — — 25 25 (1) For more information on the changes in mortgage servicing rights, see Note 10 (Mortgage Banking Activities). Table 18.4 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 year ended December 31, 2018 . Table 18.4: Gross Purchases, Sales, Issuances and Settlements – Level 3 – 2018 (in millions) Purchases Sales Issuances Settlements Net Year ended December 31, 2018 Trading debt securities: Securities of U.S. states and political subdivisions $ — — — — — Collateralized loan obligations 408 (348 ) — (161 ) (101 ) Corporate debt securities 20 (4 ) — — 16 Other trading debt securities — — — — — Total trading debt securities 428 (352 ) — (161 ) (85 ) Available-for-sale debt securities: Securities of U.S. states and political subdivisions — (6 ) 79 (210 ) (137 ) Mortgage-backed securities: Residential — — — (1 ) (1 ) Commercial — — — (33 ) (33 ) Total mortgage-backed securities — — — (34 ) (34 ) Corporate debt securities 33 — — (71 ) (38 ) Collateralized loan and other debt obligations 61 (149 ) — (209 ) (297 ) Asset-backed securities: Other asset-backed securities 25 (12 ) 166 (350 ) (171 ) Total asset-backed securities 25 (12 ) 166 (350 ) (171 ) Total available-for-sale debt securities 119 (167 ) 245 (874 ) (677 ) Mortgage loans held for sale 87 (320 ) 353 (156 ) (36 ) Loans held for sale 4 (40 ) — — (36 ) Loans 8 — 17 (156 ) (131 ) Mortgage servicing rights (residential) (1) — (71 ) 2,010 — 1,939 Net derivative assets and liabilities: Interest rate contracts — — — 351 351 Commodity contracts — — — (11 ) (11 ) Equity contracts 3 (37 ) — 556 522 Foreign exchange contracts — — — 9 9 Credit contracts 12 (7 ) — (11 ) (6 ) Other derivative contracts — — — — — Total derivative contracts 15 (44 ) — 894 865 Equity securities: Marketable — — — — — Nonmarketable — (51 ) — (399 ) (450 ) Total equity securities — (51 ) — (399 ) (450 ) Short sale liabilities — — — — — 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, Quantative Information about Valuation Techniques and Unobservable Inputs	Table 18.9 and Table 18.10 provide quantitative information about the valuation techniques and significant unobservable inputs used in the valuation of substantially all of our Level 3 assets and liabilities measured at fair value on a recurring basis for which we use an internal model. The significant unobservable inputs for Level 3 assets and liabilities that are valued using fair values obtained from third-party vendors are not included in the table, as the specific inputs applied are not provided by the vendor (see discussion regarding vendor-developed valuations within the “Level 3 Asset and Liability Valuation Processes” section previously within this Note). In addition, the table excludes the valuation techniques and significant unobservable inputs for certain classes of Level 3 assets and liabilities measured using an internal model that we consider, both individually and in the aggregate, insignificant relative to our overall Level 3 assets and liabilities. We made this determination based upon an evaluation of each class, which considered the magnitude of the positions, nature of the unobservable inputs and potential for significant changes in fair value due to changes in those inputs . Table 18.9: Valuation Techniques – Recurring Basis – 2018 ($ 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, 2018 Trading and available-for-sale debt securities: Securities of U.S. states and political subdivisions: Government, healthcare and other revenue bonds $ 404 Discounted cash flow Discount rate 2.1 - 6.4 % 3.4 43 Vendor priced Collateralized loan and other debt obligations (2) 298 Market comparable pricing Comparability adjustment (13.5 ) - 22.1 3.2 739 Vendor priced Asset-backed securities: Diversified payment rights (3) 171 Discounted cash flow Discount rate 3.4 - 6.2 4.4 Other commercial and consumer 198 (4) Discounted cash flow Discount rate 4.6 - 5.2 4.7 Weighted average life 1.1 - 1.5 yrs 1.1 20 Vendor priced Mortgage loans held for sale (residential) 982 Discounted cash flow Default rate 0.0 - 15.6 % 0.8 Discount rate 1.1 - 6.6 5.5 Loss severity 0.0 - 43.3 23.4 Prepayment rate 3.2 - 13.4 4.6 15 Market comparable pricing Comparability adjustment (56.3 ) - (6.3 ) (36.3 ) Loans 244 (5) Discounted cash flow Discount rate 3.4 - 6.4 4.2 Prepayment rate 2.9 - 100.0 87.2 Loss severity 0.0 - 34.8 10.2 Mortgage servicing rights (residential) 14,649 Discounted cash flow Cost to service per loan (6) $ 62 - 507 106 Discount rate 7.1 - 15.3 % 8.1 Prepayment rate (7) 9.0 - 23.5 9.9 Net derivative assets and (liabilities): Interest rate contracts (35 ) Discounted cash flow Default rate 0.0 - 5.0 2.0 Loss severity 50.0 - 50.0 50.0 Prepayment rate 2.8 - 25.0 13.8 Interest rate contracts: derivative loan commitments 60 Discounted cash flow Fall-out factor 1.0 - 99.0 19.4 Initial-value servicing (36.6 ) - 91.7 bps 18.5 Equity contracts 104 Discounted cash flow Conversion factor (9.3 ) - 0.0 % (7.8 ) Weighted average life 1.0 - 3.0 yrs 1.8 (121 ) Option model Correlation factor (77.0 ) - 99.0 % 21.6 Volatility factor 6.5 - 100.0 21.8 Credit contracts 3 Market comparable pricing Comparability adjustment (15.5 ) - 40.0 3.5 32 Option model Credit spread 0.9 - 21.5 1.3 Loss severity 13.0 - 60.0 45.2 Nonmarketable equity securities 5,468 Market comparable pricing Comparability adjustment (20.6 ) - (4.3 ) (15.8 ) Insignificant Level 3 assets, net of liabilities 497 (8) Total level 3 assets, net of liabilities $ 23,771 (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 $800 million of collateralized debt obligations. (3) Securities backed by specified sources of current and future receivables generated from foreign originators. (4) Predominantly 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 $62 - $204 . (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, loans held for sale, other liabilities and certain net derivative assets and liabilities, such as commodity contracts and foreign exchange contracts. (9) Consists of total Level 3 assets of $25.3 billion and total Level 3 liabilities of $1.6 billion , before netting of derivative balances. Table 18.10: Valuation Techniques – Recurring Basis – 2017 ($ in millions, except cost to service amounts) Fair Value Level 3 Valuation Technique(s) Significant Unobservable Input Range of Inputs Weighted 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 and foreign exchange 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 18.12 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 December 31, 2018 and 2017 , and for which a nonrecurring fair value adjustment was recorded during the years then ended. Table 18.12: Fair Value on a Nonrecurring Basis December 31, 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) $ — 1,213 1,233 2,446 — 1,646 1,333 2,979 Loans held for sale — 313 — 313 — 108 — 108 Loans: Commercial — 339 — 339 — 374 — 374 Consumer — 346 1 347 — 502 10 512 Total loans (2) — 685 1 686 — 876 10 886 Nonmarketable equity securities (3) — 774 157 931 — — 136 136 Other assets (4) — 149 6 155 — 177 161 338 Total assets at fair value on a nonrecurring basis (5) $ — 3,134 1,397 4,531 — 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 18.13 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 18.13: Change in Value of Assets with Nonrecurring Fair Value Adjustment Year ended December 31, (in millions) 2018 2017 Mortgage loans held for sale (LOCOM) $ 21 10 Loans held for sale (39 ) (2 ) Loans: Commercial (221 ) (335 ) Consumer (284 ) (424 ) Total loans (1) (505 ) (759 ) Nonmarketable equity securities (2) 265 (178 ) Other assets (3) (40 ) (121 ) Total $ (298 ) (1,050 ) (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, Quantative Information about Valuation Techniques and Unobservable Inputs	Table 18.14 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 18.14: Valuation Techniques – Nonrecurring Basis ($ in millions) Fair Value Level 3 Valuation Technique(s) (1) Significant Unobservable Inputs (1) Range of inputs Weighted Average (2) December 31, 2018 Residential mortgage loans held for sale (LOCOM) $ 1,233 (3) Discounted cash flow Default rate (4) 0.2 – 2.3 % 1.4 % Discount rate 1.5 – 8.5 4.0 Loss severity 0.5 – 66.0 1.7 Prepayment rate (5) 3.5 – 100.0 46.5 Nonmarketable equity securities 7 Discounted cash flow Discount rate 10.5 – 10.5 10.5 Insignificant level 3 assets 157 Total $ 1,397 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 18.10 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 December 31, 2018 and 2017 , respectively, and $27 million and $26 million of other mortgage loans that are not government insured/guaranteed at December 31, 2018 and 2017 , respectively. (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 18.15 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 18.15: Fair Value Option December 31, 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 $ 11,771 11,573 198 16,116 15,827 289 Nonaccrual loans 127 158 (31 ) 127 165 (38 ) Loans 90 days or more past due and still accruing 7 9 (2 ) 16 21 (5 ) Loans held for sale: Total loans 1,469 1,536 (67 ) 1,023 1,075 (52 ) Nonaccrual loans 21 32 (11 ) 34 56 (22 ) Loans: Total loans 244 274 (30 ) 376 404 (28 ) Nonaccrual loans 179 208 (29 ) 253 281 (28 ) Equity securities (1) 5,455 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 18.16 by income statement line item. Amounts recorded as interest income are excluded from Table 18.16 . Table 18.16: Fair Value Option – Changes in Fair Value Included in Earnings Year ended December 31, 2018 2017 2016 (in millions) Mortgage banking noninterest income Net gains (losses) from trading activities Net gains (losses) from equity securities Other noninterest income Mortgage banking noninterest income Net gains (losses) from trading activities Net gains (losses) from equity securities Other noninterest income Mortgage banking noninterest income Net gains (losses) from trading activities Net gains (losses) from equity securities Other noninterest income Mortgage loans held for sale $ 462 — — — 1,229 — — — 1,456 — — — Loans held for sale — (1 ) — 1 — 45 — 2 — 55 — 3 Loans — — — (1 ) — — — — — — — (60 ) Equity securities — — 683 — — — 1,592 — — — (12 ) — Other interests held (1) — (3 ) — — — (9 ) — — — (5 ) — — (1) Includes retained interests in securitizations.
Fair Value Option, Instrument Specific Credit Risk	Table 18.17 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 18.17: Fair Value Option – Gains/Losses Attributable to Instrument-Specific Credit Risk Year ended December 31, (in millions) 2018 2017 2016 Gains (losses) attributable to instrument-specific credit risk: Mortgage loans held for sale $ (16 ) (12 ) 3 Loans held for sale — 45 55 Total $ (16 ) 33 58
Fair Value, Estimates for Financial Instruments Excluding those Recorded at Fair Value on a Recurring Basis	Table 18.18 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 18.2 in this Note. In connection with our adoption of ASU 2016-01 in first quarter 2018, the valuation methodologies for estimating the fair value of financial instruments in Table 18.18 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 our 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 18.18: Fair Value Estimates for Financial Instruments Estimated fair value (in millions) Carrying amount Level 1 Level 2 Level 3 Total December 31, 2018 Financial assets Cash and due from banks (1) $ 23,551 23,551 — — 23,551 Interest-earning deposits with banks (1) 149,736 149,542 194 — 149,736 Federal funds sold and securities purchased under resale agreements (1) 80,207 — 80,207 — 80,207 Held-to-maturity debt securities 144,788 44,339 97,275 501 142,115 Mortgage loans held for sale 3,355 — 2,129 1,233 3,362 Loans held for sale 572 — 572 — 572 Loans, net (2)(3) 923,703 — 45,190 872,725 917,915 Nonmarketable equity securities (cost method) (4) 5,643 — — 5,675 5,675 Total financial assets $ 1,331,555 217,432 225,567 880,134 1,323,133 Financial liabilities Deposits (3)(5) $ 130,645 — 107,448 22,641 130,089 Short-term borrowings 105,787 — 105,789 — 105,789 Long-term debt (6) 229,008 — 225,904 2,230 228,134 Total financial liabilities $ 465,440 — 439,141 24,871 464,012 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 debt 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 December 31, 2018 and 2017 , respectively. (3) In connection with our adoption of ASU 2016-01, the valuation methodologies used to estimate the fair value at December 31, 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 $1.7 billion of nonmarketable equity securities accounted for under the measurement alternative at December 31, 2018 , that were accounted for under the cost method in prior periods. (5) Excludes deposit liabilities with no defined or contractual maturity of $1.2 trillion at both December 31, 2018 and 2017 . (6) Excludes capital lease obligations under capital leases of $36 million and $39 million at December 31, 2018 and 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)	12 Months Ended
	Dec. 31, 2018
Preferred Stock [Abstract]
Detail of Preferred Stock	Our total authorized, issued and outstanding preferred stock is presented in the following two tables along with the Employee Stock Ownership Plan (ESOP) Cumulative Convertible Preferred Stock. Table 19.1: Preferred Stock Shares December 31, 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) — 1,406,460 — 1,556,104 Total 9,586,770 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 19.2: Preferred Stock – Shares Issued and Carrying Value December 31, 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 1,406,460 1,407 1,407 — 1,556,104 1,556 1,556 — Total 9,377,216 $ 24,458 23,214 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%.
Detail of Employee Stock Ownership Plan Preferred Stock	Table 19.3: ESOP Preferred Stock Shares issued and outstanding Carrying value Adjustable dividend rate Dec 31, Dec 31, Dec 31, Dec 31, (in millions, except shares) 2018 2017 2018 2017 Minimum Maximum ESOP Preferred Stock $1,000 liquidation preference per share 2018 336,945 — $ 337 — 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) 1,406,460 1,556,104 $ 1,407 1,556 Unearned ESOP shares (2) $ (1,502 ) (1,678 ) (1) At December 31, 2018 and 2017 , additional paid-in capital included $95 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.

Common Stock and Stock Plans (T

Common Stock and Stock Plans (Tables)	12 Months Ended
	Dec. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Reserved, Issued and Authorized Common Stock	Table 20.1 presents our reserved, issued and authorized shares of common stock at December 31, 2018 . Table 20.1: Common Stock Shares Number of shares Dividend reinvestment and common stock purchase plans 9,114,931 Director plans 447,526 Stock plans (1) 369,893,237 Convertible securities and warrants 65,835,468 Total shares reserved 445,291,162 Shares issued 5,481,811,474 Shares not reserved or issued 3,072,897,364 Total shares authorized 9,000,000,000 (1) Includes employee options, restricted shares and restricted share rights, 401(k) profit sharing and compensation deferral plans.
Components of Stock Incentive Compensation Expense and Related Recognized Tax Benefit	Table 20.2 summarizes the major components of stock incentive compensation expense and the related recognized tax benefit. Table 20.2: Stock Incentive Compensation Expense Year ended December 31, (in millions) 2018 2017 2016 RSRs (1) $ 1,013 743 692 Performance shares 9 112 87 Stock options — (6 ) — Total stock incentive compensation expense (2) $ 1,022 849 779 Related recognized tax benefit $ 252 320 294 (1) In February 2018, a total of 11.9 million RSRs were granted to all eligible team members in the U.S., and eligible team members outside the U.S., referred to as broad-based RSRs. (2) Amounts for the year-ended December 31, 2018, were net of $19 million related to reversal of previously accrued RSR costs. Year-ended December 31, 2017, were net of $26 million related to clawback credits taken against a prior PSA awarded under our LTICP.
Summary of RSRs and Restricted Share Awards	A summary of the status of our RSRs and restricted share awards at December 31, 2018 , and changes during 2018 is presented in Table 20.3 . Table 20.3: Restricted Share Rights Number Weighted- average grant-date fair value Nonvested at January 1, 2018 34,894,376 $ 50.95 Granted 28,023,158 58.47 Vested (14,571,562 ) 52.12 Canceled or forfeited (2,773,474 ) 56.76 Nonvested at December 31, 2018 45,572,498 54.85
Summary of Performance Awards	A summary of the status of our PSAs at December 31, 2018 , and changes during 2018 is in Table 20.4 , based on the performance adjustments recognized as of December 2018 . Table 20.4: Performance Share Awards Number Weighted- average grant-date fair value (1) Nonvested at January 1, 2018 5,492,104 $ 47.81 Granted 2,570,300 58.62 Vested (1,879,523 ) 55.21 Canceled or forfeited (198,195 ) 54.48 Nonvested at December 31, 2018 5,984,686 49.91 (1) Reflects approval date fair value for grants subject to variable accounting.
Stock Option Activity and Related Information	Table 20.5 summarizes stock option activity and related information for the stock plans. Options assumed in mergers are included in the activity and related information for Incentive Compensation Plans if originally issued under an employee plan, and in the activity and related information for Director Awards if originally issued under a director plan. Table 20.5: Stock Option Activity Number Weighted- average exercise price Weighted- average remaining contractual term (in yrs.) Aggregate intrinsic value (in millions) Incentive compensation plans Options outstanding as of December 31, 2017 20,179,179 $ 32.80 Canceled or forfeited (1,886,251 ) 172.36 Exercised (9,949,771 ) 22.50 Options exercisable and outstanding as of December 31, 2018 8,343,157 13.46 0.2 $ 272 Director awards Options outstanding as of December 31, 2017 104,900 29.87 Exercised (104,900 ) 29.88 Options exercisable and outstanding as of December 31, 2018 — — 0.0 —
Employee Stock Ownership Plan	Table 20.6 presents the balance of common stock and unreleased preferred stock held in the Wells Fargo ESOP fund, the fair value of unreleased ESOP preferred stock and the dividends on allocated shares of common stock and unreleased ESOP Preferred Stock paid to the 401(k) Plan. Table 20.6: Common Stock and Unreleased Preferred Stock in the Wells Fargo ESOP Fund Shares outstanding December 31, (in millions, except shares) 2018 2017 2016 Allocated shares (common) 138,182,911 124,670,717 128,189,305 Unreleased shares (preferred) 1,406,460 1,556,104 1,439,181 Fair value of unreleased ESOP preferred shares $ 1,407 1,556 1,439 Dividends paid Year ended December 31, 2018 2017 2016 Allocated shares (common) $ 213 195 208 Unreleased shares (preferred) 159 166 169

Revenue from Contracts with C_2

Revenue from Contracts with Customers Revenue from Contracts with Customers (Tables)	12 Months Ended
	Dec. 31, 2018
Revenue from Contract with Customer [Abstract]
Reconciliation of Revenue from Segments to Consolidated [Table Text Block]	Table 21.1 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 Community Banking distribution channels. For additional description of our operating segments, including additional financial information and the underlying management accounting process, see Note 26 (Operating Segments) to Financial Statements in this Report. We adopted ASU 2014-09 – Revenue from Contracts with Customers ( “ the new revenue recognition guidance”) on a modified retrospective basis as of January 1, 2018. Under this method of adoption, prior period financial information for 2017 and 2016 was not adjusted. Rather, this ASU resulted in a cumulative-effect adjustment that decreased the beginning balance of retained earnings by $32 million on January 1, 2018, and changed the presentation of certain revenues and expenses prospectively. For details on the impact of the adoption of this ASU, see Note 1 (Summary of Significant Accounting Policies). Table 21.1 : Revenue by Operating Segment Year ended December 31, 2018 (in millions) Community Banking Wholesale Banking Wealth and Investment Management Other (3) Consolidated Net interest income (1) $ 29,219 18,690 4,441 (2,355 ) 49,995 Noninterest income: Service charges on deposit accounts 2,641 2,074 16 (15 ) 4,716 Trust and investment fees: Brokerage advisory, commissions and other fees 1,887 317 9,161 (1,929 ) 9,436 Trust and investment management 910 445 2,893 (932 ) 3,316 Investment banking (35 ) 1,783 9 — 1,757 Total trust and investment fees 2,762 2,545 12,063 (2,861 ) 14,509 Card fees 3,543 362 6 (4 ) 3,907 Other fees: Lending related charges and fees (1)(2) 278 1,247 7 (6 ) 1,526 Cash network fees 478 3 — — 481 Commercial real estate brokerage commissions — 468 — — 468 Wire transfer and other remittance fees 264 209 8 (4 ) 477 All other fees (1) 339 92 2 (1 ) 432 Total other fees 1,359 2,019 17 (11 ) 3,384 Mortgage banking (1) 2,659 362 (11 ) 7 3,017 Insurance (1) 83 312 82 (48 ) 429 Net gains from trading activities (1) 28 516 57 1 602 Net gains (losses) on debt securities (1) (3 ) 102 9 — 108 Net gains from equity investments (1) 1,505 293 (283 ) — 1,515 Lease income (1) — 1,753 — — 1,753 Other income of the segment (1) 3,117 (322 ) (21 ) (301 ) 2,473 Total noninterest income 17,694 10,016 11,935 (3,232 ) 36,413 Revenue $ 46,913 28,706 16,376 (5,587 ) 86,408 Year ended December 31, 2017 Net interest income (1) $ 28,658 18,810 4,641 (2,552 ) 49,557 Noninterest income: Service charges on deposit accounts 2,909 2,201 17 (16 ) 5,111 Trust and investment fees: Brokerage advisory, commissions and other fees 1,830 304 9,072 (1,848 ) 9,358 Trust and investment management 889 523 2,877 (917 ) 3,372 Investment banking (59 ) 1,827 (2 ) (1 ) 1,765 Total trust and investment fees 2,660 2,654 11,947 (2,766 ) 14,495 Card fees 3,613 345 6 (4 ) 3,960 Other fees: Lending related charges and fees (1)(2) 311 1,257 8 (8 ) 1,568 Cash network fees 498 8 — — 506 Commercial real estate brokerage commissions 1 461 — — 462 Wire transfer and other remittance fees 239 204 9 (4 ) 448 All other fees (1) 448 124 1 — 573 Total other fees 1,497 2,054 18 (12 ) 3,557 Mortgage banking (1) 3,895 458 (10 ) 7 4,350 Insurance (1) 139 872 88 (50 ) 1,049 Net gains from trading activities (1) (251 ) 701 92 — 542 Net gains (losses) on debt securities (1) 709 (232 ) 2 — 479 Net gains from equity investments (1) 1,455 116 208 — 1,779 Lease income (1) — 1,907 — — 1,907 Other income of the segment (1) 1,734 114 63 (308 ) 1,603 Total noninterest income 18,360 11,190 12,431 (3,149 ) 38,832 Revenue $ 47,018 30,000 17,072 (5,701 ) 88,389 (continued on following page) (continued from previous page) Year ended December 31, 2016 Community Banking Wholesale Banking Wealth and Investment Management Other (3) Consolidated Net interest income (1) $ 27,333 18,699 4,249 (2,527 ) 47,754 Noninterest income: Service charges on deposit accounts 3,111 2,260 19 (18 ) 5,372 Trust and investment fees: Brokerage advisory, commissions and other fees 1,854 368 8,870 (1,876 ) 9,216 Trust and investment management 849 473 2,891 (877 ) 3,336 Investment banking (141 ) 1,833 (1 ) — 1,691 Total trust and investment fees 2,562 2,674 11,760 (2,753 ) 14,243 Card fees 3,598 336 6 (4 ) 3,936 Other fees: Lending related charges and fees (1)(2) 364 1,198 8 (8 ) 1,562 Cash network fees 528 9 — — 537 Commercial real estate brokerage commissions — 494 — — 494 Wire transfer and other remittance fees 219 178 8 (4 ) 401 All other fees (1) 525 206 2 — 733 Total other fees 1,636 2,085 18 (12 ) 3,727 Mortgage banking (1) 5,624 475 (9 ) 6 6,096 Insurance (1) 112 1,156 — — 1,268 Net gains from trading activities (1) (148 ) 677 81 — 610 Net gains (losses) on debt securities (1) 933 8 1 — 942 Net gains from equity investments (1) 804 199 100 — 1,103 Lease income (1) — 1,927 — — 1,927 Other income of the segment (1) 948 551 53 (263 ) 1,289 Total noninterest income 19,180 12,348 12,029 (3,044 ) 40,513 Revenue $ 46,513 31,047 16,278 (5,571 ) 88,267 (1) Most of our revenue is not within the scope of Accounting Standards Update (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. (2) Represents combined amount of previously reported “Charges and fees on loans” and “Letters of credit fees”. (3) 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 Community Banking distribution channels.
Disaggregation of Revenue [Table Text Block]	Table 21.5 presents our card fees by operating segment. Table 21.5 : Card Fees by Operating Segment Year ended December 31, Community Banking Wholesale Banking Wealth and Investment Management Other Consolidated (in millions) 2018 2017 2016 2018 2017 2016 2018 2017 2016 2018 2017 2016 2018 2017 2016 Credit card interchange and network revenues (1) $ 792 944 959 361 345 329 6 6 6 (4 ) (4 ) (4 ) 1,155 1,291 1,290 Debit card interchange and network revenues 2,053 1,964 1,889 — — 7 — — — — — — 2,053 1,964 1,896 Late fees, cash advance fees, balance transfer fees, and annual fees 698 705 750 1 — — — — — — — — 699 705 750 Card fees (1) $ 3,543 3,613 3,598 362 345 336 6 6 6 (4 ) (4 ) (4 ) 3,907 3,960 3,936 (1) The cost of credit card rewards and rebates of $1.4 billion , $1.2 billion and $1.0 billion for the years ended December 31, 2018 , 2017 and 2016 , respectively, are presented net against the related revenues. Table 21.2 presents our service charges on deposit accounts by operating segment. Table 21.2 : Service Charges on Deposit Accounts by Operating Segment Year ended December 31, Community Banking Wholesale Banking Wealth and Investment Management Other Consolidated (in millions) 2018 2017 2016 2018 2017 2016 2018 2017 2016 2018 2017 2016 2018 2017 2016 Overdraft fees $ 1,776 1,941 2,024 5 6 6 1 1 — — — — 1,782 1,948 2,030 Account charges 865 968 1,087 2,069 2,195 2,254 15 16 19 (15 ) (16 ) (18 ) 2,934 3,163 3,342 Service charges on deposit accounts $ 2,641 2,909 3,111 2,074 2,201 2,260 16 17 19 (15 ) (16 ) (18 ) 4,716 5,111 5,372 Table 21.4 presents our trust and investment management fees by operating segment. Table 21.4 : Trust and Investment Management Fees by Operating Segment Year ended December 31, Community Banking Wholesale Banking Wealth and Investment Management Other Consolidated (in millions) 2018 2017 2016 2018 2017 2016 2018 2017 2016 2018 2017 2016 2018 2017 2016 Investment management fees $ — 1 — — — — 2,087 2,053 2,079 — — — 2,087 2,054 2,079 Trust fees 908 887 847 329 421 399 728 757 738 (932 ) (916 ) (875 ) 1,033 1,149 1,109 Other revenue 2 1 2 116 102 74 78 67 74 — (1 ) (2 ) 196 169 148 Trust and investment management fees $ 910 889 849 445 523 473 2,893 2,877 2,891 (932 ) (917 ) (877 ) 3,316 3,372 3,336 Table 21.3 presents our brokerage advisory, commissions and other fees by operating segment. Table 21.3 : Brokerage Advisory, Commissions and Other Fees by Operating Segment Year ended December 31, Community Banking Wholesale Banking Wealth and Investment Management Other Consolidated (in millions) 2018 2017 2016 2018 2017 2016 2018 2017 2016 2018 2017 2016 2018 2017 2016 Asset-based revenue (1) $ 1,482 1,372 1,243 1 1 2 6,899 6,630 6,164 (1,484 ) (1,371 ) (1,241 ) 6,898 6,632 6,168 Transactional revenue 340 382 454 70 40 55 1,618 1,802 2,032 (380 ) (400 ) (477 ) 1,648 1,824 2,064 Other revenue 65 76 157 246 263 311 644 640 674 (65 ) (77 ) (158 ) 890 902 984 Brokerage advisory, commissions and other fees $ 1,887 1,830 1,854 317 304 368 9,161 9,072 8,870 (1,929 ) (1,848 ) (1,876 ) 9,436 9,358 9,216 (1) We earned trailing commissions of $1.3 billion for each of the years ended December 31, 2018 , 2017 , and 2016 .

Employee Benefits and Other E_2

Employee Benefits and Other Expenses (Tables)	12 Months Ended
	Dec. 31, 2018
Defined Benefit Plan [Abstract]
Changes in Benefit Obligation and Fair Value of Plan Assets	Table 22.1 presents the changes in the benefit obligation and the fair value of plan assets, the funded status, and the amounts recognized on the balance sheet. Table 22.1: Changes in Benefit Obligation and Fair Value of Plan Assets December 31, 2018 December 31, 2017 Pension benefits Pension benefits (in millions) Qualified Non- qualified Other benefits Qualified Non- qualified Other benefits Change in benefit obligation: Benefit obligation at beginning of year $ 11,110 621 611 10,774 630 731 Service cost 11 — — 5 — — Interest cost 392 21 21 412 24 28 Plan participants’ contributions — — 48 — — 40 Actuarial loss (gain) (674 ) (27 ) (33 ) 634 46 (102 ) Benefits paid (719 ) (57 ) (92 ) (651 ) (79 ) (88 ) Medicare Part D subsidy — — 2 — — 1 Amendment 1 — — — — — Settlement — — — (74 ) — — Other 13 — — — — — Foreign exchange impact (5 ) (1 ) (2 ) 10 — 1 Benefit obligation at end of year 10,129 557 555 11,110 621 611 Change in plan assets: Fair value of plan assets at beginning of year 10,667 — 565 10,120 — 549 Actual return on plan assets (478 ) — (17 ) 1,253 — 56 Employer contribution 10 57 5 11 79 7 Plan participants’ contributions — — 48 — — 40 Benefits paid (719 ) (57 ) (92 ) (651 ) (79 ) (88 ) Medicare Part D subsidy — — 2 — — 1 Settlement — — — (74 ) — — Other 1 — — — — — Foreign exchange impact (4 ) — — 8 — — Fair value of plan assets at end of year 9,477 — 511 10,667 — 565 Funded status at end of year $ (652 ) (557 ) (44 ) (443 ) (621 ) (46 ) Amounts recognized on the balance sheet at end of year: Assets $ 1 — — — — — Liabilities (653 ) (557 ) (44 ) (443 ) (621 ) (46 )
Pension Plans with Benefit Obligations in Excess of Plan Assets	Table 22.2 provides information for pension and post retirement plans with benefit obligations in excess of plan assets. Table 22.2: Plans with Benefit Obligations in Excess of Plan Assets December 31, 2018 December 31, 2017 (in millions) Pension Benefits Other Benefits Pension Benefits Other Benefits Projected benefit obligation $ 10,640 N/A 11,721 N/A Accumulated benefit obligation 10,627 555 11,717 611 Fair value of plan assets 9,429 511 10,656 565
Net Periodic Benefit Cost and Other Comprehensive Income	Table 22.3 presents the components of net periodic benefit cost and other comprehensive income (OCI). Table 22.3: Net Periodic Benefit Cost and Other Comprehensive Income December 31, 2018 December 31, 2017 December 31, 2016 Pension benefits Pension benefits Pension benefits (in millions) Qualified Non- qualified Other benefits Qualified Non- qualified Other benefits Qualified Non- qualified Other benefits Service cost $ 11 — — 5 — — 3 — — Interest cost (1) 392 21 21 412 24 28 422 26 39 Expected return on plan assets (1) (641 ) — (31 ) (652 ) — (30 ) (608 ) — (30 ) Amortization of net actuarial loss (gain) (1) 131 14 (18 ) 148 11 (9 ) 146 12 (5 ) Amortization of prior service credit (1) — — (10 ) — — (10 ) — — (2 ) Settlement loss (1) 134 2 — 7 6 — 5 2 — Net periodic benefit cost 27 37 (38 ) (80 ) 41 (21 ) (32 ) 40 2 Other changes in plan assets and benefit obligations recognized in other comprehensive income: Net actuarial loss (gain) 445 (27 ) 15 33 46 (128 ) 302 9 (82 ) Amortization of net actuarial gain (loss) (131 ) (14 ) 18 (148 ) (11 ) 9 (146 ) (12 ) 5 Prior service cost (credit) (2) 1 — — 1 — — — — (177 ) Amortization of prior service credit — — 10 — — 10 — — 2 Settlement (134 ) (2 ) — (8 ) (6 ) — (5 ) (2 ) — Total recognized in other comprehensive income 181 (43 ) 43 (122 ) 29 (109 ) 151 (5 ) (252 ) Total recognized in net periodic benefit cost and other comprehensive income $ 208 (6 ) 5 (202 ) 70 (130 ) 119 35 (250 ) (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 and 2016 , these balances were reported in employee benefits. (2) In 2016, a prior service credit of $177 million was recognized for an amendment that reduced the Wells Fargo & Company Retiree Plan obligation.
Benefits Recognized in Cumulative OCI	Table 22.4 provides the amounts recognized in cumulative OCI (pre tax). Table 22.4: Benefits Recognized in Cumulative OCI December 31, 2018 December 31, 2017 Pension benefits Pension benefits (in millions) Qualified Non- qualified Other benefits Qualified Non- qualified Other benefits Net actuarial loss (gain) $ 3,336 149 (327 ) 3,156 192 (360 ) Net prior service cost (credit) 1 — (156 ) — — (166 ) Total $ 3,337 149 (483 ) 3,156 192 (526 )
Weighted Average Assumptions for Estimating Projected Benefit Obligation and Determining Net Periodic Benefit Cost	Table 22.5 presents the weighted-average assumptions used to estimate the projected benefit obligation for pension benefits. Table 22.5: Weighted-Average Assumptions Used to Estimate Projected Benefit Obligation December 31, 2018 December 31, 2017 Pension benefits Pension benefits Qualified Non- qualified Other benefits Qualified Non- qualified Other benefits Discount rate 4.30 % 4.20 4.24 3.65 3.55 3.54 Interest crediting rate 3.22 2.18 N/A 2.74 1.54 N/A Table 22.6 presents the weighted-average assumptions used to determine the net periodic benefit cost. Table 22.6: Weighted-Average Assumptions Used to Determine Net Periodic Benefit Cost December 31, 2018 December 31, 2017 December 31, 2016 Pension benefits Pension benefits Pension benefits Qualified Non- qualified Other benefits Qualified Non- qualified Other benefits Qualified Non- qualified Other benefits Discount rate (1) 3.65 % 3.65 3.54 3.98 3.93 4.00 3.99 4.11 4.16 Interest crediting rate (1) 2.74 1.68 N/A 2.92 1.85 N/A 3.03 2.02 N/A Expected return on plan assets 6.24 N/A 5.75 6.70 N/A 5.75 6.75 N/A 5.75 (1) Includes the impact of interim re-measurements as applicable.
Projected Benefit Payments	Future benefits that we expect to pay under the pension and other benefit plans are presented in Table 22.7 . Table 22.7: Projected Benefit Payments Pension benefits (in millions) Qualified Non- qualified Other Benefits Year ended December 31, 2019 $ 784 52 46 2020 771 50 48 2021 767 49 48 2022 759 46 47 2023 711 44 46 2024-2028 3,381 199 198
Pension and Other Benefits Plan Assets	Table 22.8 presents the balances of pension plan assets and other benefit plan assets measured at fair value. See Note 18 (Fair Values of Assets and Liabilities) for fair value hierarchy level definitions. Table 22.8: Pension and Other Benefit Plan Assets Carrying value at year end Pension plan assets Other benefits plan assets (in millions) Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total December 31, 2018 Cash and cash equivalents $ 2 284 — 286 69 22 — 91 Long duration fixed income (1) 902 4,414 — 5,316 — — — — Intermediate (core) fixed income (2) — 118 — 118 — 183 — 183 High-yield fixed income — 114 — 114 — — — — International fixed income 55 186 — 241 — — — — Domestic large-cap stocks (3) 582 238 — 820 — 115 — 115 Domestic mid-cap stocks 167 89 — 256 — 28 — 28 Domestic small-cap stocks 141 7 — 148 — 17 — 17 Global stocks (4) 72 357 — 429 — — — — International stocks (5) 449 110 — 559 9 40 — 49 Emerging market stocks — 205 — 205 — — — — Real estate 148 33 14 195 — — — — Hedge funds/absolute return 63 32 — 95 — — — — Other 34 44 8 86 4 — 24 28 Plan investments - excluding investments at NAV $ 2,615 6,231 22 8,868 82 405 24 511 Investments at NAV (6) 566 — Net receivables 43 — Total plan assets $ 9,477 511 December 31, 2017 Cash and cash equivalents $ 1 234 — 235 85 23 — 108 Long duration fixed income (1) 875 4,424 — 5,299 — — — — Intermediate (core) fixed income (2) — 255 — 255 — 185 — 185 High-yield fixed income — 267 — 267 — — — — International fixed income 60 223 — 283 — — — — Domestic large-cap stocks (3) 825 300 — 1,125 — 130 — 130 Domestic mid-cap stocks 227 133 — 360 — 34 — 34 Domestic small-cap stocks 224 12 — 236 — 20 — 20 Global stocks (4) 89 391 — 480 — — — — International stocks (5) 542 257 — 799 23 38 — 61 Emerging market stocks — 305 — 305 — — — — Real estate 157 31 20 208 — — — — Hedge funds/absolute return 62 28 — 90 — — — — Other — 72 8 80 3 — 23 26 Plan investments - excluding investments at NAV $ 3,062 6,932 28 10,022 111 430 23 564 Investments at NAV (6) 594 — Net receivables 51 1 Total plan assets $ 10,667 565 (1) This category includes a diversified mix of assets, which are being managed in accordance with a duration target of approximately 10 years and an emphasis on corporate credit bonds combined with investments in U.S. Treasury securities and other U.S. agency and non-agency bonds. (2) This category includes assets that are intermediate duration, investment grade bonds held in investment strategies benchmarked to the Bloomberg Barclays Capital U.S. Aggregate Bond Index, including U.S. Treasury securities, agency and non-agency asset-backed bonds and corporate bonds. (3) This category covers a broad range of investment styles, including active, enhanced index and passive approaches, as well as style characteristics of value, core and growth emphasized strategies. Assets in this category are currently diversified across eight unique investment strategies with no single investment manager strategy representing more than 2.0% of total plan assets. (4) This category consists of five unique investment strategies providing exposure to broadly diversified, global equity investments, which generally have an allocation of 40 - 60% in U.S. domiciled equities and an equivalent allocation range in non-U.S. equities, with no single strategy representing more than 1.5% of total Plan assets. (5) This category includes assets diversified across four unique investment strategies providing exposure to companies in developed market, non-U.S. countries with no single strategy representing more than 2.5% of total plan assets. (6) Consists of certain investments 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 Level 3 Pension and Other Benefit Plan Assets	Table 22.9 presents the changes in Level 3 pension plan and other benefit plan assets measured at fair value. Table 22.9: Fair Value Level 3 Pension and Other Benefit Plan Assets Balance beginning of year Gains (losses) Purchases, sales and settlements (net) Transfers Into/ (Out of) Level 3 Balance end of year (in millions) Realized Unrealized (1) Quarter ended December 31, 2018 Pension plan assets: Real estate $ 20 (2 ) (1 ) (3 ) — 14 Other 8 — — — — 8 Total pension plan assets $ 28 (2 ) (1 ) (3 ) — 22 Other benefits plan assets: Other $ 23 1 — — — 24 Total other benefit plan assets $ 23 1 — — — 24 Quarter ended December 31, 2017 Pension plan assets: Long duration fixed income $ 19 — — — (19 ) — Real estate 25 (3 ) 5 (4 ) (3 ) 20 Other 8 — — — — 8 Total pension plan assets $ 52 (3 ) 5 (4 ) (22 ) 28 Other benefits plan assets: Other $ 23 — — — — 23 Total other benefit plan assets $ 23 — — — — 23 (1) All unrealized gains (losses) relate to instruments held at period end.
Other Expenses	Table 22.10 presents expenses exceeding 1% of total interest income and noninterest income in any of the years presented that are not otherwise shown separately in the financial statements or Notes to Financial Statements. Table 22.10: Other Expenses Year ended December 31, (in millions) 2018 2017 2016 Outside professional services $ 3,306 3,813 3,138 Operating losses 3,124 5,492 1,608 Contract services (1) 2,192 1,638 1,497 Credit card rewards and rebates (2) 1,401 1,201 1,047 Operating leases 1,334 1,351 1,329 Outside data processing 660 891 888 (1) The periods prior to 2018 have been revised to conform with the current period presentation whereby temporary help is included in contract services rather than in all other noninterest expense. (2) Noninterest income from card fees is net of cardholder rewards and rebates expense.

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Income Tax Expense	Table 23.1 presents the components of income tax expense. Table 23.1: Income Tax Expense Year ended December 31, (in millions) 2018 2017 2016 Current: Federal $ 2,382 3,507 6,712 State and local 1,140 561 1,395 Foreign 170 183 175 Total current 3,692 4,251 8,282 Deferred: Federal 1,706 156 1,498 State and local 236 564 296 Foreign 28 (54 ) (1 ) Total deferred 1,970 666 1,793 Total $ 5,662 4,917 10,075
Net Deferred Tax Liability	The tax effects of our temporary differences that gave rise to significant portions of our deferred tax assets and liabilities are presented in Table 23.2 . Table 23.2: Net Deferred Tax Liability Dec 31, Dec 31, (in millions) 2018 2017 Deferred tax assets Allowance for loan losses $ 2,644 2,816 Deferred compensation and employee benefits 2,893 2,377 Accrued expenses 815 722 PCI loans 467 1,057 Net unrealized losses on debt securities 1,022 — Net operating loss and tax credit carry forwards 366 341 Other 1,272 986 Total deferred tax assets 9,479 8,299 Deferred tax assets valuation allowance (315 ) (397 ) Deferred tax liabilities Mortgage servicing rights (3,475 ) (3,421 ) Leasing (4,271 ) (4,084 ) Basis difference in investments (1,203 ) (577 ) Mark to market, net (7,252 ) (5,816 ) Intangible assets (427 ) (539 ) Net unrealized gains on debt securities — (55 ) Insurance reserves (696 ) (750 ) Other (831 ) (821 ) Total deferred tax liabilities (18,155 ) (16,063 ) Net deferred tax liability (1) $ (8,991 ) (8,161 ) (1) The net deferred tax liability is included in accrued expenses and other liabilities.
Effective Income Tax Expense and Rate	Table 23.3 reconciles the statutory federal income tax expense and rate to the effective income tax expense and rate. Our effective tax rate is calculated by dividing income tax expense by income before income tax expense less the net income from noncontrolling interests. Table 23.3: Effective Income Tax Expense and Rate December 31, 2018 2017 2016 (in millions) Amount Rate Amount Rate Amount Rate Statutory federal income tax expense and rate $ 5,892 21.0 % $ 9,485 35.0 % $ 11,204 35.0 % Change in tax rate resulting from: State and local taxes on income, net of federal income tax benefit 1,076 3.9 926 3.4 1,004 3.1 Tax-exempt interest (494 ) (1.8 ) (812 ) (3.0 ) (725 ) (2.2 ) Tax credits (1,537 ) (5.5 ) (1,419 ) (5.2 ) (1,251 ) (3.9 ) Non-deductible accruals 236 0.8 1,320 4.9 81 0.3 Tax reform 164 0.6 (3,713 ) (13.7 ) — — Other 325 1.2 (870 ) (3.3 ) (238 ) (0.8 ) Effective income tax expense and rate $ 5,662 20.2 % $ 4,917 18.1 % $ 10,075 31.5 %
Change in Unrecognized Tax Benefits	Table 23.4 presents the change in unrecognized tax benefits. Table 23.4: Change in Unrecognized Tax Benefits Year ended December 31, (in millions) 2018 2017 Balance at beginning of year $ 5,167 5,029 Additions: For tax positions related to the current year 393 367 For tax positions related to prior years 503 158 Reductions: For tax positions related to prior years (262 ) (319 ) Lapse of statute of limitations (7 ) (48 ) Settlements with tax authorities (44 ) (20 ) Balance at end of year $ 5,750 5,167

Earnings Per Common Share (Tabl

Earnings Per Common Share (Tables)	12 Months Ended
	Dec. 31, 2018
Earnings Per Share [Abstract]
Earnings Per Common Share	Table 24.1 shows earnings per common share and diluted earnings per common share and reconciles the numerator and denominator of both earnings per common share calculations. See Note 1 (Summary of Significant Accounting Policies) for discussion of private share repurchases, and the Consolidated Statement of Changes in Equity and Note 20 (Common Stock and Stock Plans) for information about stock and options activity and terms and conditions of warrants. Table 24.1: Earnings Per Common Share Calculations Year ended December 31, (in millions, except per share amounts) 2018 2017 2016 Wells Fargo net income $ 22,393 22,183 21,938 Less: Preferred stock dividends and other (1) 1,704 1,629 1,565 Wells Fargo net income applicable to common stock (numerator) $ 20,689 20,554 20,373 Earnings per common share Average common shares outstanding (denominator) 4,799.7 4,964.6 5,052.8 Per share $ 4.31 4.14 4.03 Diluted earnings per common share Average common shares outstanding 4,799.7 4,964.6 5,052.8 Add: Stock options 8.0 17.1 18.9 Restricted share rights 26.3 24.7 25.9 Warrants 4.4 10.9 10.7 Diluted average common shares outstanding (denominator) 4,838.4 5,017.3 5,108.3 Per share $ 4.28 4.10 3.99 (1) The year ended December 31, 2018, includes $ 155 million as a result of eliminating the discount on our Series J Preferred Stock, which was redeemed on September 17, 2018.
Antidilutive Warrants And Options Outstanding	Table 24.2 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 24.2: Outstanding Anti-Dilutive Options Weighted-average shares Year ended December 31, (in millions) 2018 2017 2016 Options 0.3 1.9 3.2
Dividends Declared per common share	Table 24.3 presents dividends declared per common share. Table 24.3: Dividends Declared Per Common Share Year ended December 31, 2018 2017 2016 Per common share $ 1.640 1.540 1.515

Other Comprehensive Income (Tab

Other Comprehensive Income (Tables)	12 Months Ended
	Dec. 31, 2018
Cumulative Other Comprehensive Income Balances [Abstract] [Abstract]
Summary of Other Comprehensive Income	Table 25.1 provides the components of other comprehensive income (OCI), reclassifications to net income by income statement line item, and the related tax effects. Table 25.1: Summary of Other Comprehensive Income Year ended December 31, 2018 2017 2016 (in millions) 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 $ (4,493 ) 1,100 (3,393 ) 2,719 (1,056 ) 1,663 (3,458 ) 1,302 (2,156 ) Reclassification of net (gains) losses to net income: Interest income on debt securities (2) 357 (88 ) 269 198 (75 ) 123 7 (3 ) 4 Net gains on debt securities (108 ) 27 (81 ) (479 ) 181 (298 ) (942 ) 355 (587 ) Net gains from equity securities (3) — — — (456 ) 172 (284 ) (300 ) 113 (187 ) Other noninterest income (1 ) — (1 ) — — — (5 ) 2 (3 ) Subtotal reclassifications to net income 248 (61 ) 187 (737 ) 278 (459 ) (1,240 ) 467 (773 ) Net change (4,245 ) 1,039 (3,206 ) 1,982 (778 ) 1,204 (4,698 ) 1,769 (2,929 ) Derivatives and hedging activities: Fair Value Hedges: Change in fair value of excluded components on fair value hedges (4) (254 ) 63 (191 ) (253 ) 95 (158 ) — — — Cash Flow Hedges: Net unrealized gains (losses) arising during the period on cash flow hedges (278 ) 67 (211 ) (287 ) 108 (179 ) 177 (67 ) 110 Reclassification of net (gains) losses to net income: Interest income on loans 292 (72 ) 220 (551 ) 208 (343 ) (1,043 ) 393 (650 ) Interest expense on long-term debt 2 — 2 8 (3 ) 5 14 (5 ) 9 Subtotal reclassifications to net income 294 (72 ) 222 (543 ) 205 (338 ) (1,029 ) 388 (641 ) Net change (238 ) 58 (180 ) (1,083 ) 408 (675 ) (852 ) 321 (531 ) Defined benefit plans adjustments: Net actuarial and prior service gains (losses) arising during the period (434 ) 106 (328 ) 49 (12 ) 37 (52 ) (40 ) (92 ) Reclassification of amounts to noninterest expense and employee benefits (5): Amortization of net actuarial loss 127 (31 ) 96 150 (57 ) 93 153 (57 ) 96 Settlements and other 126 (29 ) 97 3 2 5 5 (1 ) 4 Subtotal reclassifications to noninterest expense and employee benefits 253 (60 ) 193 153 (55 ) 98 158 (58 ) 100 Net change (181 ) 46 (135 ) 202 (67 ) 135 106 (98 ) 8 Foreign currency translation adjustments: Net unrealized gains (losses) arising during the period (156 ) 1 (155 ) 96 3 99 (3 ) 4 1 Net change (156 ) 1 (155 ) 96 3 99 (3 ) 4 1 Other comprehensive income (loss) $ (4,820 ) 1,144 (3,676 ) 1,197 (434 ) 763 (5,447 ) 1,996 (3,451 ) Less: Other comprehensive loss from noncontrolling interests, net of tax (2 ) (62 ) (17 ) Wells Fargo other comprehensive income (loss), net of tax $ (3,674 ) 825 (3,434 ) (1) The years ended December 31, 2017 and 2016, include net unrealized gains (losses) arising during the period from equity securities of $81 million and $259 million and reclassification of net (gains) losses to net income related to equity securities of $(456) million and $(300) million , respectively. In connection with our adoption in first quarter 2018 of ASU 2016-01 – Financial Instruments – Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities , the year ended December 31, 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 our adoption of ASU 2016-01 – Financial Instruments – Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities on January 1, 2018, this line will not contain balances as realized and unrealized gains and losses on marketable equity investments will be 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 hedge effectiveness and recorded in other comprehensive income. (5) 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 reclassified to other noninterest expense on the consolidated statement of income. For 2017 and 2016, these balances were reclassified to employee benefits.
Cumulative OCI Balances	Table 25.2 provides the cumulative OCI balance activity on an after-tax basis. Table 25.2: Cumulative OCI Balances (in millions) Debt securities (1) Derivatives and hedging activities Defined benefit plans adjustments Foreign currency translation adjustments Cumulative other comprehensive income (loss) Balance, December 31, 2015 $ 1,813 620 (1,951 ) (185 ) 297 Net unrealized gains (losses) arising during the period (2,156 ) 110 (92 ) 1 (2,137 ) Amounts reclassified from accumulated other comprehensive income (773 ) (641 ) 100 — (1,314 ) Net change (2,929 ) (531 ) 8 1 (3,451 ) Less: Other comprehensive loss from noncontrolling interests (17 ) — — — (17 ) Balance, December 31, 2016 (1,099 ) 89 (1,943 ) (184 ) (3,137 ) Transition adjustment (2) — 168 — — 168 Balance, January 1, 2017 (1,099 ) 257 (1,943 ) (184 ) (2,969 ) Net unrealized gains (losses) arising during the period 1,663 (337 ) 37 99 1,462 Amounts reclassified from accumulated other comprehensive income (459 ) (338 ) 98 — (699 ) Net change 1,204 (675 ) 135 99 763 Less: Other comprehensive income (loss) from noncontrolling interests (66 ) — — 4 (62 ) Balance, December 31, 2017 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 (4) 31 (87 ) (353 ) 9 (400 ) Net unrealized losses arising during the period (3,393 ) (402 ) (328 ) (155 ) (4,278 ) Amounts reclassified from accumulated other comprehensive income 187 222 193 — 602 Net change (3,175 ) (267 ) (488 ) (146 ) (4,076 ) Less: Other comprehensive loss from noncontrolling interests — — — (2 ) (2 ) Balance, December 31, 2018 $ (3,122 ) (685 ) (2,296 ) (233 ) (6,336 ) (1) The years ended December 31, 2017 and 2016, include net unrealized gains (losses) arising during the period from equity securities of $81 million and $259 million and reclassification of net (gains) losses to net income related to equity securities of $(456) million and $(300) million , respectively. In connection with our adoption in first quarter 2018 of ASU 2016-01 – Financial Instruments – Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities , the year ended December 31, 2018, reflects net unrealized gains (losses) arising during the period and reclassification of net (gains) losses to net income from only debt securities. (2) Transition adjustment relates to our adoption of ASU 2017-12 – Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities . See Note 1 (Summary of Significant Accounting Policies) for more information. (3) The transition adjustment relates to our 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) Represents the reclassification from other comprehensive income to retained earnings as a result of our adoption of ASU 2018-02 – Income Statement-Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income in third quarter 2018. See Note 1 (Summary of Significant Accounting Policies) for more information.

Operating Segments (Tables)

Operating Segments (Tables)	12 Months Ended
	Dec. 31, 2018
Segment Reporting [Abstract]
Operating Segments	Table 26.1 presents our results by operating segment. Table 26.1: Operating Segments (income/expense in millions, average balances in billions) Community Banking Wholesale Banking Wealth and Investment Management Other (1) Consolidated Company 2018 Net interest income (2) $ 29,219 18,690 4,441 (2,355 ) 49,995 Provision (reversal of provision) for credit losses 1,783 (58 ) (5 ) 24 1,744 Noninterest income 17,694 10,016 11,935 (3,232 ) 36,413 Noninterest expense 30,491 16,157 12,938 (3,460 ) 56,126 Income (loss) before income tax expense (benefit) 14,639 12,607 3,443 (2,151 ) 28,538 Income tax expense (benefit) 3,784 1,555 861 (538 ) 5,662 Net income (loss) before noncontrolling interests 10,855 11,052 2,582 (1,613 ) 22,876 Less: Net income from noncontrolling interests 461 20 2 — 483 Net income (loss) (3) $ 10,394 11,032 2,580 (1,613 ) 22,393 2017 (4) Net interest income (2) $ 28,658 18,810 4,641 (2,552 ) 49,557 Provision (reversal of provision) for credit losses 2,555 (19 ) (5 ) (3 ) 2,528 Noninterest income 18,360 11,190 12,431 (3,149 ) 38,832 Noninterest expense 32,615 16,624 12,623 (3,378 ) 58,484 Income (loss) before income tax expense (benefit) 11,848 13,395 4,454 (2,320 ) 27,377 Income tax expense (benefit) 634 3,496 1,668 (881 ) 4,917 Net income (loss) before noncontrolling interests 11,214 9,899 2,786 (1,439 ) 22,460 Less: Net income (loss) from noncontrolling interests 276 (15 ) 16 — 277 Net income (loss) (3) $ 10,938 9,914 2,770 (1,439 ) 22,183 2016 (4) Net interest income (2) $ 27,333 18,699 4,249 (2,527 ) 47,754 Provision (reversal of provision) for credit losses 2,691 1,073 (5 ) 11 3,770 Noninterest income 19,180 12,348 12,029 (3,044 ) 40,513 Noninterest expense 27,655 15,901 12,051 (3,230 ) 52,377 Income (loss) before income tax expense (benefit) 16,167 14,073 4,232 (2,352 ) 32,120 Income tax expense (benefit) 5,213 4,159 1,596 (893 ) 10,075 Net income (loss) before noncontrolling interests 10,954 9,914 2,636 (1,459 ) 22,045 Less: Net income (loss) from noncontrolling interests 136 (28 ) (1 ) — 107 Net income (loss) (3) $ 10,818 9,942 2,637 (1,459 ) 21,938 2018 Average loans $ 463.7 465.7 74.6 (58.8 ) 945.2 Average assets 1,034.1 830.5 83.9 (59.6 ) 1,888.9 Average deposits 757.2 423.7 165.0 (70.0 ) 1,275.9 2017 (4) Average loans 475.7 465.6 71.9 (57.1 ) 956.1 Average assets 1,085.5 822.8 82.8 (58.1 ) 1,933.0 Average deposits 729.6 464.2 189.0 (78.2 ) 1,304.6 (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 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. (4) Prior period operating segment results have been revised to reflect a methodology change of allocating funding charges and credits.

Parent-Only Financial Stateme_2

Parent-Only Financial Statements (Tables)	12 Months Ended
	Dec. 31, 2018
Condensed Financial Information Disclosure [Abstract]
Parent-Only Statement of Income	The following tables present Parent-only condensed financial statements. Table 27.1: Parent-Only Statement of Income Year ended December 31, (in millions) 2018 2017 2016 Income Dividends from subsidiaries (1) $ 22,427 20,746 12,776 Interest income from subsidiaries 3,298 1,984 1,615 Other interest income 49 146 155 Other income (424 ) 1,238 177 Total income 25,350 24,114 14,723 Expense Interest expense: Indebtedness to nonbank subsidiaries 644 189 387 Short-term borrowings 2 — — Long-term debt 4,541 3,595 2,619 Other 3 5 19 Noninterest expense 286 1,888 1,300 Total expense 5,476 5,677 4,325 Income before income tax benefit and equity in undistributed income of subsidiaries 19,874 18,437 10,398 Income tax benefit (544 ) (319 ) (1,152 ) Equity in undistributed income of subsidiaries 1,975 3,427 10,388 Net income $ 22,393 22,183 21,938 (1) Includes dividends paid from indirect bank subsidiaries of $20.8 billion , $17.9 billion and $12.5 billion in 2018 , 2017 and 2016 , respectively.
Parent-Only Statement of Comprehensive Income	Table 27.2: Parent-Only Statement of Comprehensive Income Year ended December 31, (in millions) 2018 2017 2016 Net income $ 22,393 22,183 21,938 Other comprehensive income (loss), net of tax: Debt securities (1) (12 ) 94 (76 ) Derivatives and hedging activities (198 ) (158 ) — Defined benefit plans adjustment (132 ) 118 (20 ) Equity in other comprehensive income (loss) of subsidiaries (3,332 ) 771 (3,338 ) Other comprehensive income (loss), net of tax: (3,674 ) 825 (3,434 ) Total comprehensive income $ 18,719 23,008 18,504 (1) The years ended December 31, 2017 and 2016 , includes net unrealized gains arising during the period from equity securities of $ 3 million and $ 7 million and reclassification of net (gains) to net income related to equity securities of $ (21) million and $ (30) million , respectively. In connection with our adoption in first quarter 2018 of ASU 2016-01 – Financial Instruments – Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities , the year ended December 31, 2018 , reflects net unrealized gains (losses) arising during the period and reclassification of net (gains) losses to net income from only debt securities.
Parent-Only Balance Sheet	Table 27.3: Parent-Only Balance Sheet Dec 31, Dec 31, (in millions) 2018 2017 Assets Cash, cash equivalents, and restricted cash due from (1): Subsidiary banks $ 16,301 23,180 Nonaffiliates — 1 Debt securities: Trading, at fair value (2) — 24 Available-for-sale, at fair value (2) 1 5 Loans to nonbank subsidiaries 139,163 138,681 Investments in subsidiaries (3) 202,695 206,367 Equity securities (2) 2,164 2,414 Other assets (2) 4,639 4,731 Total assets $ 364,963 375,403 Liabilities and equity Accrued expenses and other liabilities $ 6,986 $ 7,902 Long-term debt 135,079 146,130 Indebtedness to nonbank subsidiaries 26,732 14,435 Total liabilities 168,797 168,467 Stockholders’ equity 196,166 206,936 Total liabilities and equity $ 364,963 375,403 (1) Financial information has been revised to reflect the impact of our 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 restricted cash. See Note 1 (Summary of Significant Accounting Policies) for more information. (2) Financial information for the prior period has been revised to reflect presentation changes made in connection with our 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) The years ended December 31, 2018 , and December 31, 2017 , include indirect ownership of bank subsidiaries with equity of $167.6 billion and $170.5 billion , respectively.
Parent-Only Statement of Cash Flows	Table 27.4: Parent-Only Statement of Cash Flows Year ended December 31, (in millions) 2018 2017 2016 Cash flows from operating activities: Net cash provided by operating activities (1) $ 19,024 22,233 10,654 Cash flows from investing activities: Available-for-sale debt securities: Proceeds from sales: Subsidiary banks — 8,658 — Nonaffiliates (1) — 8,824 5,201 Prepayments and maturities: Subsidiary banks — 10,250 15,000 Purchases: Subsidiary banks — (3,900 ) (15,000 ) Nonaffiliates — — (6,544 ) Equity securities, not held for trading: Proceeds from sales and capital returns (1) 355 743 583 Purchases (1) (220 ) (215 ) (314 ) Loans: Net repayments from (advances to) subsidiaries (7 ) (35,876 ) 3,174 Capital notes and term loans made to subsidiaries (2,441 ) (73,729 ) (32,641 ) Principal collected on notes/loans made to subsidiaries 756 69,286 15,164 Net decrease (increase) in investment in subsidiaries 2,407 (2,029 ) (606 ) Other, net 109 113 18 Net cash provided (used) by investing activities 959 (17,875 ) (15,965 ) Cash flows from financing activities: Net increase (decrease) in short-term borrowings and indebtedness to subsidiaries 12,467 (8,685 ) 789 Long-term debt: Proceeds from issuance 1,876 22,217 34,362 Repayment (9,162 ) (13,709 ) (15,096 ) Preferred stock: Proceeds from issuance — 677 2,101 Redeemed (2,150 ) — — Cash dividends paid (1,622 ) (1,629 ) (1,566 ) Common stock: Proceeds from issuance 632 1,211 1,415 Stock tendered for payment of withholding taxes (331 ) (393 ) (494 ) Repurchased (20,633 ) (9,908 ) (8,116 ) Cash dividends paid (7,692 ) (7,480 ) (7,472 ) Other, net (248 ) (138 ) (118 ) Net cash provided (used) by financing activities (26,863 ) (17,837 ) 5,805 Net change in cash, cash equivalents, and restricted cash (2) (6,880 ) (13,479 ) 494 Cash, cash equivalents, and restricted cash at beginning of year (2) 23,181 36,660 36,166 Cash, cash equivalents, and restricted cash at end of year (2) $ 16,301 23,181 36,660 (1) Financial information for the prior period has been revised to reflect presentation changes made in connection with our 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) Financial information has been revised to reflect the impact of our 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 restricted cash. See Note 1 (Summary of Significant Accounting Policies) for more information.

Regulatory and Agency Capital_2

Regulatory and Agency Capital Requirements (Tables)	12 Months Ended
	Dec. 31, 2018
Banking and Thrift [Abstract]
Regulatory Capital Information	Table 28.1 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 December 31, 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 28.1: Regulatory Capital Information Wells Fargo & Company Wells Fargo Bank, N.A. December 31, 2018 December 31, 2017 December 31, 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 $ 146,363 146,363 154,765 154,765 142,685 142,685 143,292 143,292 Tier 1 167,866 167,866 178,209 178,209 142,685 142,685 143,292 143,292 Total 198,798 207,041 210,333 220,097 155,558 163,380 156,661 165,734 Assets: Risk-weighted assets $ 1,177,350 1,247,210 1,199,545 1,260,663 1,058,653 1,154,182 1,090,360 1,169,863 Adjusted average assets (1) 1,850,299 1,850,299 1,905,568 1,905,568 1,652,009 1,652,009 1,708,828 1,708,828 Regulatory capital ratios: Common equity tier 1 capital 12.43 % 11.74 * 12.90 12.28 * 13.48 12.36 * 13.14 12.25 * Tier 1 capital 14.26 13.46 * 14.86 14.14 * 13.48 12.36 * 13.14 12.25 * Total capital 16.89 16.60 * 17.53 17.46 * 14.69 14.16 * 14.37 14.17 * Tier 1 leverage (1) 9.07 9.07 9.35 9.35 8.64 8.64 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 28.2 presents the minimum required regulatory capital ratios under Transition Requirements to which the Company and the Bank were subject as of December 31, 2018 , and December 31, 2017 . Table 28.2: Minimum Required Regulatory Capital Ratios – Transition Requirements (1) Wells Fargo & Company Wells Fargo Bank, N.A. December 31, 2018 December 31, 2017 December 31, 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 December 31, 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 December 31, 2018 .

Summary of Significant Accoun_4

Summary of Significant Accounting Policies (Details) - USD ($) shares in Millions, $ in Millions		3 Months Ended	12 Months Ended
		Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Jan. 01, 2018
Supplemental cash flow information - Noncash activities
Trading debt securities retained from securitization of mortgages held for sale			$ 37,265	$ 52,435	$ 72,399
Transfers from loans to MLHFS			5,366	5,500	6,894
Transfers from available-for-sale debt securities to held-to-maturity debt securities			$ 16,479	$ 50,405	4,161
Private Forward Repurchase Transaction [Member]
Summary of Significant Accounting Policies [Line Items]
Common stock repurchased, shares		14.7	94	89
Private forward repurchase contract			$ 0	$ 0	750
Collaborative Arrangement [Member] | Product Concentration Risk [Member] | Revenue [Member]
Summary of Significant Accounting Policies [Line Items]
Concentration risk, percentage			1.00%
Loans [Member]
Supplemental cash flow information - Noncash activities
Deconsolidation, reverse mortgages sold			$ 0	0	3,807
Long-term debt [Member]
Supplemental cash flow information - Noncash activities
Deconsolidation, reverse mortgages sold			0	0	$ 3,769
Accounting Standards Update 2018-02 [Member]
Summary of Significant Accounting Policies [Line Items]
Adoption of accounting standard	[1]		0
Retained earnings [Member] | Accounting Standards Update 2018-02 [Member]
Summary of Significant Accounting Policies [Line Items]
Adoption of accounting standard	[1]		400
Retained earnings [Member] | Accounting Standards Update 2016-01 [Member]
Summary of Significant Accounting Policies [Line Items]
Cumulative effect from change in accounting principle						$ 106
Retained earnings [Member] | Accounting Standards Update 2016-01 [Member] | Auction rate securities [Member]
Summary of Significant Accounting Policies [Line Items]
Cumulative effect from change in accounting principle						(12)
Retained earnings [Member] | Accounting Standards Update 2016-04 [Member]
Summary of Significant Accounting Policies [Line Items]
Cumulative effect from change in accounting principle						20
Retained earnings [Member] | Accounting Standards Update 2014-09 [Member]
Summary of Significant Accounting Policies [Line Items]
Cumulative effect from change in accounting principle						$ (32)
Cumulative other comprehensive income [Member] | Accounting Standards Update 2018-02 [Member]
Summary of Significant Accounting Policies [Line Items]
Adoption of accounting standard	[1]		$ (400)
Cumulative other comprehensive income [Member] | Accounting Standards Update 2016-01 [Member]
Summary of Significant Accounting Policies [Line Items]
Cumulative effect from change in accounting principle	[2]			$ (118)
[1]	(2)Represents the reclassification from other comprehensive income to retained earnings as a result of our 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.
[2]	(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.

Business Combinations (Details)

Business Combinations (Details) $ in Millions	12 Months Ended
	Dec. 31, 2018USD ($)business	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)
Business Acquisition [Line Items]
Number of Businesses Acquired | business	0
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Less Noncontrolling Interest			$ 36,976
Branches Divested | business	52
Deposit Divested	$ 2,000
Pending Acquisition [Member]
Business Acquisition [Line Items]
Number of Businesses Acquired | business	0
Golden Capital Management, LLC [Member]
Business Acquisition [Line Items]
Business Acquisition, Name of Acquired Entity		Golden Capital Management, LLC
Business Acquisition, Location of Acquired Business		Charlotte, NC
Business Acquisition, Description of Acquired Entity		Asset Management
Business Acquisition, Effective Date of Acquisition		Jul. 1, 2017
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Less Noncontrolling Interest		$ 83
GE Railcar Services [Member]
Business Acquisition [Line Items]
Business Acquisition, Name of Acquired Entity			GE Railcar Services
Business Acquisition, Location of Acquired Business			Chicago, IL
Business Acquisition, Description of Acquired Entity			Railcar and locomotive leasing
Business Acquisition, Effective Date of Acquisition			Jan. 1, 2016
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Less Noncontrolling Interest			$ 4,339
GE Capital's Commercial Distribution Finance and Vendor Finance Businesses [Member]
Business Acquisition [Line Items]
Business Acquisition, Name of Acquired Entity			GE Capital’s Commercial Distribution Finance and Vendor Finance Businesses
Business Acquisition, Location of Acquired Business			North America, Asia, Australia / New Zealand and EMEA
Business Acquisition, Description of Acquired Entity			Specialty Lending
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Less Noncontrolling Interest			$ 32,531
Analytic Investors, LLC [Member]
Business Acquisition [Line Items]
Business Acquisition, Name of Acquired Entity			Analytic Investors, LLC
Business Acquisition, Location of Acquired Business			Los Angeles, CA
Business Acquisition, Description of Acquired Entity			Asset Management
Business Acquisition, Effective Date of Acquisition			Oct. 1, 2016
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Less Noncontrolling Interest			$ 106
North America [Member] | GE Capital's Commercial Distribution Finance and Vendor Finance Businesses [Member]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition			Mar. 1, 2016
Asia [Member] | GE Capital's Commercial Distribution Finance and Vendor Finance Businesses [Member]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition			Jul. 1, 2016
Australia And New Zealand [Member] | GE Capital's Commercial Distribution Finance and Vendor Finance Businesses [Member]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition			Aug. 1, 2016
EMEA [Member] | GE Capital's Commercial Distribution Finance and Vendor Finance Businesses [Member]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition			Oct. 1, 2016

Cash, Loan and Dividend Restr_3

Cash, Loan and Dividend Restrictions (Details) - USD ($) $ / shares in Units, $ in Millions	Mar. 01, 2019	Jan. 22, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash, Loan and Dividend Restrictions [Line Items]
Average Cash Reserve Deposit Required And Made Federal Reserve Banks			$ 12,428	$ 12,306
Credit And Non-Credit Transactions With All Nonbank Affiliates, Maximum Percent of Bank Capital and Surplus			20.00%
Common Stock, Dividends, Per Share, Declared			$ 1.640	$ 1.540	$ 1.515
Reserve balance for non-US central banks [Member]
Cash, Loan and Dividend Restrictions [Line Items]
Restricted Cash Equivalents			$ 517	$ 617
Segregated for benefit brokerage customers under federal and other brokerage regulations f[Member]
Cash, Loan and Dividend Restrictions [Line Items]
Restricted Cash Equivalents			1,135	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			147	$ 487
Bank Subsidiaries [Member]
Cash, Loan and Dividend Restrictions [Line Items]
Statutory Accounting Practices, Statutory Amount Available for Dividend Payments without Regulatory Approval			15,200
Nonbank Subsidiaries [Member]
Cash, Loan and Dividend Restrictions [Line Items]
Statutory Accounting Practices, Statutory Amount Available for Dividend Payments without Regulatory Approval			$ 24,400
Subsequent Event [Member]
Cash, Loan and Dividend Restrictions [Line Items]
Common Stock, Dividends, Per Share, Declared		$ 0.45
Dividends Payable, Date Declared		Jan. 22, 2019
Dividends Payable, Date To be Paid	Mar. 1, 2019
Credit and non-credit transactions with a single nonbank affiliate, maximum percent of bank capital and surplus [Member]
Cash, Loan and Dividend Restrictions [Line Items]
Capital Required to be Well Capitalized to Risk Weighted Assets			10.00%

Trading Assets and Liabilities

Trading Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Trading Assets and Liabilities [Line Items]
Trading debt securities	$ 69,989	$ 57,624	[1]
Trading equity securities	19,449	30,004
Loans held for sale	2,041	1,131	[1]
Derivative asset	34,560	36,355
Net amounts in consolidated balance sheet, asset	10,770	12,228
Trading assets	100,316	100,362
Gross trading derivative liabilities	32,047	34,298
Net amounts in consolidated balance sheet, liability	8,499	8,796
Total trading liabilities	27,259	26,796
Held for Trading [Member]
Trading Assets and Liabilities [Line Items]
Loans held for sale	1,469	1,023
Derivative asset	29,216	31,340
Netting, derivative assets (1)	(19,807)	(19,629)
Net amounts in consolidated balance sheet, asset	9,409	11,711
Short sales	19,720	18,472
Gross trading derivative liabilities	28,717	31,386
Netting, derivative liabilities (1)	(21,178)	(23,062)
Net amounts in consolidated balance sheet, liability	$ 7,539	$ 8,324
[1]	(2)Financial information for the prior period has been revised to reflect presentation changes in connection with our 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.

Trading Activities Net Interest

Trading Activities Net Interest Income and Net Gains (Losses) on Trading Activities (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017		Dec. 31, 2016
Net Interest Income and Net Gains (Losses) on Trading Activities [Line Items]
Debt Securities, interest income	$ 2,831	$ 2,313		$ 2,047
Equity Securities, interest income	992	799	[1]	635	[1]
Loans held for sale, interest income	140	50	[1]	38	[1]
Total interest income	64,647	58,909		53,663
Total interest expense	587	416		353
Net interest Income	49,995	49,557		47,754
Debt securities, net gain (Losses)	(824)	125		(444)
Equity securities, net gains (losses)	(4,240)	3,394		1,213
Loans held for sale, net gain (losses)	(1)	45		55
Derivatives (3)	5,667	(3,022)		(214)
Net gains from trading activities (1)	602	542	[1]	610	[1]
Total trading-related net interest and noninterest income	3,495	2,992		2,716
Held for Trading [Member]
Net Interest Income and Net Gains (Losses) on Trading Activities [Line Items]
Equity Securities, interest income	587	515		383
Loans held for sale, interest income	62	38		29
Total interest income	3,480	2,866		2,459
Net interest Income	$ 2,893	$ 2,450		$ 2,106
[1]	(1)Financial information for the prior periods has been revised to reflect presentation changes made in connection with our 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.

AFS and HTM Debt Securities, Ma

AFS and HTM Debt Securities, Major Categories (Details) - USD ($)	Dec. 31, 2018	Dec. 31, 2017
Available-for-sale debt securities:
Amortized Cost	$ 272,471,000,000	$ 275,096,000,000
Gross unrealized gains	1,659,000,000	3,182,000,000
Gross unrealized losses	(4,218,000,000)	(1,871,000,000)
Fair Value	269,912,000,000	276,407,000,000	[1]
Held-to-maturity debt securities:
Held-to-maturity Securities, Amortized Cost	144,788,000,000	139,335,000,000
Gross unrealized gains	146,000,000	478,000,000
Gross unrealized losses	(2,819,000,000)	(828,000,000)
Held-to-maturity, at fair value	142,115,000,000	138,985,000,000
Total AFS amd HTM Debt securities:
Amortized Cost	417,259,000,000	414,431,000,000
Gross unrealized gains	1,805,000,000	3,660,000,000
Gross unrealized losses	(7,037,000,000)	(2,699,000,000)
Fair Value	412,027,000,000	415,392,000,000
Securities of Single Issuer with Book Value Greater Than Ten Percent of Stockholders' Equity, Amount	0	0
Securities of U.S. Treasury and federal agencies [Member]
Available-for-sale debt securities:
Amortized Cost	13,451,000,000	6,425,000,000
Gross unrealized gains	3,000,000	2,000,000
Gross unrealized losses	(106,000,000)	(108,000,000)
Fair Value	13,348,000,000	6,319,000,000
Held-to-maturity debt securities:
Held-to-maturity Securities, Amortized Cost	44,751,000,000	44,720,000,000
Gross unrealized gains	4,000,000	189,000,000
Gross unrealized losses	(415,000,000)	(103,000,000)
Held-to-maturity, at fair value	44,340,000,000	44,806,000,000
Securities of U.S. states and political subdivisions [Member]
Available-for-sale debt securities:
Amortized Cost	48,994,000,000	50,733,000,000
Gross unrealized gains	716,000,000	1,032,000,000
Gross unrealized losses	(446,000,000)	(439,000,000)
Fair Value	49,264,000,000	51,326,000,000
Held-to-maturity debt securities:
Held-to-maturity Securities, Amortized Cost	6,286,000,000	6,313,000,000
Gross unrealized gains	30,000,000	84,000,000
Gross unrealized losses	(116,000,000)	(43,000,000)
Held-to-maturity, at fair value	6,200,000,000	6,354,000,000
Securities of U.S. states and political subdivisions [Member] | Nontaxable Preferred Debt Securities [Member]
Available-for-sale debt securities:
Amortized Cost	6,300,000,000	5,200,000,000
Fair Value	6,300,000,000	5,200,000,000
Total mortgage-backed securities [Member]
Available-for-sale debt securities:
Amortized Cost	162,819,000,000	169,404,000,000
Gross unrealized gains	551,000,000	1,264,000,000
Gross unrealized losses	(3,167,000,000)	(1,276,000,000)
Fair Value	160,203,000,000	169,392,000,000
Federal agencies [Member]
Available-for-sale debt securities:
Amortized Cost	155,974,000,000	160,561,000,000
Gross unrealized gains	369,000,000	930,000,000
Gross unrealized losses	(3,140,000,000)	(1,272,000,000)
Fair Value	153,203,000,000	160,219,000,000
Held-to-maturity debt securities:
Held-to-maturity Securities, Amortized Cost	93,685,000,000	87,527,000,000
Gross unrealized gains	112,000,000	201,000,000
Gross unrealized losses	(2,288,000,000)	(682,000,000)
Held-to-maturity, at fair value	91,509,000,000	87,046,000,000
Residential [Member]
Available-for-sale debt securities:
Amortized Cost	2,638,000,000	4,356,000,000
Gross unrealized gains	142,000,000	254,000,000
Gross unrealized losses	(5,000,000)	(2,000,000)
Fair Value	2,775,000,000	4,608,000,000
Commercial [Member]
Available-for-sale debt securities:
Amortized Cost	4,207,000,000	4,487,000,000
Gross unrealized gains	40,000,000	80,000,000
Gross unrealized losses	(22,000,000)	(2,000,000)
Fair Value	4,225,000,000	4,565,000,000
Corporate debt securities [Member]
Available-for-sale debt securities:
Amortized Cost	6,230,000,000	7,343,000,000
Gross unrealized gains	131,000,000	363,000,000
Gross unrealized losses	(90,000,000)	(40,000,000)
Fair Value	6,271,000,000	7,666,000,000
Collateralized loan obligations [Member]
Available-for-sale debt securities:
Amortized Cost	35,581,000,000	35,675,000,000
Gross unrealized gains	158,000,000	384,000,000
Gross unrealized losses	(396,000,000)	(3,000,000)
Fair Value	35,343,000,000	36,056,000,000
Held-to-maturity debt securities:
Held-to-maturity Securities, Amortized Cost	66,000,000	661,000,000
Gross unrealized gains	0	4,000,000
Gross unrealized losses	0	0
Held-to-maturity, at fair value	66,000,000	665,000,000
Collateralized debt obligations [Member]
Available-for-sale debt securities:
Amortized Cost	662,000,000	887,000,000
Fair Value	800,000,000	1,000,000,000
Asset-backed Securities, Securitized Loans and Receivables [Member]
Held-to-maturity debt securities:
Held-to-maturity Securities, Amortized Cost	0	114,000,000
Held-to-maturity, at fair value	0	114,000,000
Other [Member]
Available-for-sale debt securities:
Amortized Cost	5,396,000,000	5,516,000,000
Gross unrealized gains	100,000,000	137,000,000
Gross unrealized losses	(13,000,000)	(5,000,000)
Fair Value	5,483,000,000	5,648,000,000
Held-to-maturity debt securities:
Held-to-maturity Securities, Amortized Cost	0	114,000,000
Gross unrealized gains	0	0
Gross unrealized losses	0	0
Held-to-maturity, at fair value	$ 0	$ 114,000,000
[1]	(2)Financial information for the prior period has been revised to reflect presentation changes in connection with our 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	Dec. 31, 2018	Dec. 31, 2017
Available-for-sale debt securities:
Less than 12 months, Gross unrealized losses, available-for-sale	$ (598)	$ (295)
Less than 12 months, Fair value, available-for-sale	54,683	63,600
12 months or more, Gross unrealized losses, available-for-sale	(3,620)	(1,576)
12 months or more, Fair value, available-for-sale	128,631	59,989
Total, Gross unrealized losses, available-for-sale	(4,218)	(1,871)
Total Fair Value, available for sale	183,314	123,589
Held-to-maturity debt securities:
Less than 12 months, Gross unrealized losses, held-to-maturity	(12)	(272)
Less than 12 months, Fair value, held-to-maturity	6,128	41,468
12 months or more, Gross unrealized losses, held-to-maturity	(2,807)	(556)
12 months or more, Fair value, held-to-maturity	122,816	31,417
Total, Gross unrealized losses, held-to-maturity	(2,819)	(828)
Total, Fair value, held-to-maturity	128,944	72,885
Total AFS and HTM Debt securities:
Less than 12 months, Gross unrealized losses, investment securities	(610)	(567)
Less than 12 months, Fair value, investment securities	60,811	105,068
12 months or more, Gross unrealized losses, investment securities	(6,427)	(2,132)
12 months or more, Fair value, investment securities	251,447	91,406
Total, Gross unrealized losses, investment securities	(7,037)	(2,699)
Total, Fair value, investment securities	312,258	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	(1)	(27)
Less than 12 months, Fair value, available-for-sale	498	4,065
12 months or more, Gross unrealized losses, available-for-sale	(105)	(81)
12 months or more, Fair value, available-for-sale	6,204	2,209
Total, Gross unrealized losses, available-for-sale	(106)	(108)
Total Fair Value, available for sale	6,702	6,274
Held-to-maturity debt securities:
Less than 12 months, Gross unrealized losses, held-to-maturity	(3)	(69)
Less than 12 months, Fair value, held-to-maturity	895	11,255
12 months or more, Gross unrealized losses, held-to-maturity	(412)	(34)
12 months or more, Fair value, held-to-maturity	41,083	1,490
Total, Gross unrealized losses, held-to-maturity	(415)	(103)
Total, Fair value, held-to-maturity	41,978	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	(73)	(17)
Less than 12 months, Fair value, available-for-sale	9,746	6,179
12 months or more, Gross unrealized losses, available-for-sale	(373)	(422)
12 months or more, Fair value, available-for-sale	9,017	11,766
Total, Gross unrealized losses, available-for-sale	(446)	(439)
Total Fair Value, available for sale	18,763	17,945
Held-to-maturity debt securities:
Less than 12 months, Gross unrealized losses, held-to-maturity	(4)	(5)
Less than 12 months, Fair value, held-to-maturity	598	500
12 months or more, Gross unrealized losses, held-to-maturity	(112)	(38)
12 months or more, Fair value, held-to-maturity	3,992	1,683
Total, Gross unrealized losses, held-to-maturity	(116)	(43)
Total, Fair value, held-to-maturity	4,590	2,183
Mortgage-backed securities [Member]
Available-for-sale debt securities:
Less than 12 months, Gross unrealized losses, available-for-sale	(65)	(245)
Less than 12 months, Fair value, available-for-sale	13,349	52,707
12 months or more, Gross unrealized losses, available-for-sale	(3,102)	(1,031)
12 months or more, Fair value, available-for-sale	112,400	44,882
Total, Gross unrealized losses, available-for-sale	(3,167)	(1,276)
Total Fair Value, available for sale	125,749	97,589
Federal agencies [Member]
Available-for-sale debt securities:
Less than 12 months, Gross unrealized losses, available-for-sale	(42)	(243)
Less than 12 months, Fair value, available-for-sale	10,979	52,559
12 months or more, Gross unrealized losses, available-for-sale	(3,098)	(1,029)
12 months or more, Fair value, available-for-sale	112,252	44,691
Total, Gross unrealized losses, available-for-sale	(3,140)	(1,272)
Total Fair Value, available for sale	123,231	97,250
Held-to-maturity debt securities:
Less than 12 months, Gross unrealized losses, held-to-maturity	(5)	(198)
Less than 12 months, Fair value, held-to-maturity	4,635	29,713
12 months or more, Gross unrealized losses, held-to-maturity	(2,283)	(484)
12 months or more, Fair value, held-to-maturity	77,741	28,244
Total, Gross unrealized losses, held-to-maturity	(2,288)	(682)
Total, Fair value, held-to-maturity	82,376	57,957
Residential [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	398	47
12 months or more, Gross unrealized losses, available-for-sale	(2)	(1)
12 months or more, Fair value, available-for-sale	69	58
Total, Gross unrealized losses, available-for-sale	(5)	(2)
Total Fair Value, available for sale	467	105
Commercial [Member]
Available-for-sale debt securities:
Less than 12 months, Gross unrealized losses, available-for-sale	(20)	(1)
Less than 12 months, Fair value, available-for-sale	1,972	101
12 months or more, Gross unrealized losses, available-for-sale	(2)	(1)
12 months or more, Fair value, available-for-sale	79	133
Total, Gross unrealized losses, available-for-sale	(22)	(2)
Total Fair Value, available for sale	2,051	234
Corporate debt securities [Member]
Available-for-sale debt securities:
Less than 12 months, Gross unrealized losses, available-for-sale	(64)	(4)
Less than 12 months, Fair value, available-for-sale	1,965	239
12 months or more, Gross unrealized losses, available-for-sale	(26)	(36)
12 months or more, Fair value, available-for-sale	298	503
Total, Gross unrealized losses, available-for-sale	(90)	(40)
Total Fair Value, available for sale	2,263	742
Collateralized loan obligations [Member]
Available-for-sale debt securities:
Less than 12 months, Gross unrealized losses, available-for-sale	(388)	(1)
Less than 12 months, Fair value, available-for-sale	28,306	373
12 months or more, Gross unrealized losses, available-for-sale	(8)	(2)
12 months or more, Fair value, available-for-sale	553	146
Total, Gross unrealized losses, available-for-sale	(396)	(3)
Total Fair Value, available for sale	28,859	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	(7)	(1)
Less than 12 months, Fair value, available-for-sale	819	37
12 months or more, Gross unrealized losses, available-for-sale	(6)	(4)
12 months or more, Fair value, available-for-sale	159	483
Total, Gross unrealized losses, available-for-sale	(13)	(5)
Total Fair Value, available for sale	$ 978	$ 520

AFS and HTM Debt Securities, Un

AFS and HTM Debt Securities, Unrealized Loss Position, by Credit Rating (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Available-for-sale debt securities:
Gross unrealized losses	$ (4,218)	$ (1,871)
Fair Value	269,912	276,407	[1]
Held-to-maturity debt securities:
Gross unrealized losses	(2,819)	(828)
Fair value	142,115	138,985
Total AFS and HTM Debt securities:
Gross unrealized losses	(7,037)	(2,699)
Fair Value	412,027	415,392
Securities of U.S. Treasury and federal agencies [Member]
Available-for-sale debt securities:
Gross unrealized losses	(106)	(108)
Fair Value	13,348	6,319
Held-to-maturity debt securities:
Gross unrealized losses	(415)	(103)
Fair value	44,340	44,806
Securities of U.S. states and political subdivisions [Member]
Available-for-sale debt securities:
Gross unrealized losses	(446)	(439)
Fair Value	49,264	51,326
Held-to-maturity debt securities:
Gross unrealized losses	(116)	(43)
Fair value	6,200	6,354
Mortgage-backed securities [Member]
Available-for-sale debt securities:
Gross unrealized losses	(3,167)	(1,276)
Fair Value	160,203	169,392
Federal agencies [Member]
Available-for-sale debt securities:
Gross unrealized losses	(3,140)	(1,272)
Fair Value	153,203	160,219
Held-to-maturity debt securities:
Gross unrealized losses	(2,288)	(682)
Fair value	91,509	87,046
Residential [Member]
Available-for-sale debt securities:
Gross unrealized losses	(5)	(2)
Fair Value	2,775	4,608
Commercial [Member]
Available-for-sale debt securities:
Gross unrealized losses	(22)	(2)
Fair Value	4,225	4,565
Corporate debt securities [Member]
Available-for-sale debt securities:
Gross unrealized losses	(90)	(40)
Fair Value	6,271	7,666
Collateralized loan obligations [Member]
Available-for-sale debt securities:
Gross unrealized losses	(396)	(3)
Fair Value	35,343	36,056
Held-to-maturity debt securities:
Gross unrealized losses	0	0
Fair value	66	665
Other [Member]
Available-for-sale debt securities:
Gross unrealized losses	(13)	(5)
Fair Value	5,483	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	(20)	(32)
Fair Value	5,200	6,900
Investment grade [Member]
Available-for-sale debt securities:
Gross unrealized losses	(4,113)	(1,812)
Fair Value	181,050	122,804
Held-to-maturity debt securities:
Gross unrealized losses	(2,809)	(826)
Fair value	128,545	72,717
Total AFS and HTM Debt securities:
Gross unrealized losses	(6,922)	(2,638)
Fair Value	309,595	195,521
Investment grade [Member] | Securities of U.S. Treasury and federal agencies [Member]
Available-for-sale debt securities:
Gross unrealized losses	(106)	(108)
Fair Value	6,702	6,274
Held-to-maturity debt securities:
Gross unrealized losses	(415)	(103)
Fair value	41,978	12,745
Investment grade [Member] | Securities of U.S. states and political subdivisions [Member]
Available-for-sale debt securities:
Gross unrealized losses	(425)	(412)
Fair Value	18,447	17,763
Held-to-maturity debt securities:
Gross unrealized losses	(116)	(43)
Fair value	4,590	2,183
Investment grade [Member] | Mortgage-backed securities [Member]
Available-for-sale debt securities:
Gross unrealized losses	(3,162)	(1,274)
Fair Value	125,525	97,475
Investment grade [Member] | Federal agencies [Member]
Available-for-sale debt securities:
Gross unrealized losses	(3,140)	(1,272)
Fair Value	123,231	97,250
Held-to-maturity debt securities:
Gross unrealized losses	(2,278)	(680)
Fair value	81,977	57,789
Investment grade [Member] | Residential [Member]
Available-for-sale debt securities:
Gross unrealized losses	(2)	(1)
Fair Value	295	42
Investment grade [Member] | Commercial [Member]
Available-for-sale debt securities:
Gross unrealized losses	(20)	(1)
Fair Value	1,999	183
Investment grade [Member] | Corporate debt securities [Member]
Available-for-sale debt securities:
Gross unrealized losses	(17)	(13)
Fair Value	791	304
Investment grade [Member] | Collateralized loan obligations [Member]
Available-for-sale debt securities:
Gross unrealized losses	(396)	(3)
Fair Value	28,859	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	(7)	(2)
Fair Value	726	469
Non-investment grade [Member]
Available-for-sale debt securities:
Gross unrealized losses	(105)	(59)
Fair Value	2,264	785
Held-to-maturity debt securities:
Gross unrealized losses	(10)	(2)
Fair value	399	168
Total AFS and HTM Debt securities:
Gross unrealized losses	(115)	(61)
Fair Value	2,663	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	(21)	(27)
Fair Value	316	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	(5)	(2)
Fair Value	224	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	(10)	(2)
Fair value	399	168
Non-investment grade [Member] | Residential [Member]
Available-for-sale debt securities:
Gross unrealized losses	(3)	(1)
Fair Value	172	63
Non-investment grade [Member] | Commercial [Member]
Available-for-sale debt securities:
Gross unrealized losses	(2)	(1)
Fair Value	52	51
Non-investment grade [Member] | Corporate debt securities [Member]
Available-for-sale debt securities:
Gross unrealized losses	(73)	(27)
Fair Value	1,472	438
Non-investment grade [Member] | Collateralized loan 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	(6)	(3)
Fair Value	$ 252	$ 51
[1]	(2)Financial information for the prior period has been revised to reflect presentation changes in connection with our 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	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Available-for-sale securities:
Contractual maturities, Total amount, available-for-sale	$ 269,912	$ 276,407	[1]
Weighted average yield contractual maturities, Total, available-for-sale	3.70%	3.72%
Due within 1 year, Contractual maturities, available-for-sale	$ 5,060	$ 2,990
Percentage of weighted average yield, Due within 1 year, available-for-sale	2.89%	3.70%
Due in 1-5 years, Contractual maturities, available-for-sale	$ 22,411	$ 19,158
Percentage of weighted average yield, Due in 1-5 years, available-for-sale	2.82%	3.11%
Due in 5-10 years, Contractual maturities, available-for-sale	$ 19,995	$ 28,059
Percentage of weighted average yield, Due In 5-10 years, available-for-sale	3.64%	3.24%
Due in 10 years or more, Contractual maturities, available-for-sale	$ 222,446	$ 226,200
Percentage of weighted average yield, Due after 10 years, available-for-sale	3.81%	3.83%
Held-to-maturity securities:
Held-to-maturity Securities, Amortized Cost	$ 144,788	$ 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%
Due in 1-5 years, Contractual maturities, held-to-maturity, cost	$ 32,454	$ 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	$ 13,649	$ 13,757
Percentage of weighted average yield, Due In 5-10 years, held-to-maturity, cost	2.55%	2.55%
Due in 10 years or more, Contractual maturities, held-to-maturity, cost	$ 98,685	$ 93,069
Percentage of weighted average yield, Due after 10 years, held-to-maturity, cost	3.19%	3.28%
Held-to-maturity securities, at fair value:
Contractual maturities, Total amount, held-to-maturity, fair value	$ 142,115	$ 138,985
Due within 1 year, Contractual maturities, held-to-maturity, at fair value	0	0
Due in 1-5 years, Contractual maturities, held-to-maturity, at fair value	32,169	32,566
Due in 5-10 years, Contractual maturities, held-to-maturity, at fair value	13,524	13,795
Due in 10 years or more, Contractual maturities, held-to-maturity, at fair value	96,422	92,624
Securities of U.S. Treasury and federal agencies [Member]
Available-for-sale securities:
Contractual maturities, Total amount, available-for-sale	$ 13,348	$ 6,319
Weighted average yield contractual maturities, Total, available-for-sale	1.87%	1.59%
Due within 1 year, Contractual maturities, available-for-sale	$ 1,087	$ 81
Percentage of weighted average yield, Due within 1 year, available-for-sale	1.52%	1.37%
Due in 1-5 years, Contractual maturities, available-for-sale	$ 12,213	$ 6,189
Percentage of weighted average yield, Due in 1-5 years, available-for-sale	1.90%	1.59%
Due in 5-10 years, Contractual maturities, available-for-sale	$ 48	$ 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	$ 44,751	$ 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%
Due in 1-5 years, Contractual maturities, held-to-maturity, cost	$ 32,356	$ 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	$ 12,395	$ 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, at fair value:
Contractual maturities, Total amount, held-to-maturity, fair value	$ 44,340	$ 44,806
Due within 1 year, Contractual maturities, held-to-maturity, at fair value	0	0
Due in 1-5 years, Contractual maturities, held-to-maturity, at fair value	32,073	32,388
Due in 5-10 years, Contractual maturities, held-to-maturity, at fair value	12,267	12,418
Due in 10 years or more, Contractual maturities, held-to-maturity, at fair value	0	0
Securities of U.S. states and political subdivisions [Member]
Available-for-sale securities:
Contractual maturities, Total amount, available-for-sale	$ 49,264	$ 51,326
Weighted average yield contractual maturities, Total, available-for-sale	4.78%	5.88%
Due within 1 year, Contractual maturities, available-for-sale	$ 3,568	$ 2,380
Percentage of weighted average yield, Due within 1 year, available-for-sale	2.92%	3.47%
Due in 1-5 years, Contractual maturities, available-for-sale	$ 6,644	$ 9,484
Percentage of weighted average yield, Due in 1-5 years, available-for-sale	3.42%	3.42%
Due in 5-10 years, Contractual maturities, available-for-sale	$ 4,635	$ 2,276
Percentage of weighted average yield, Due In 5-10 years, available-for-sale	3.44%	4.63%
Due in 10 years or more, Contractual maturities, available-for-sale	$ 34,417	$ 37,186
Percentage of weighted average yield, Due after 10 years, available-for-sale	5.42%	6.75%
Held-to-maturity securities:
Held-to-maturity Securities, Amortized Cost	$ 6,286	$ 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%
Due in 1-5 years, Contractual maturities, held-to-maturity, cost	$ 72	$ 50
Percentage of weighted average yield, Due In 1-5 years, held-to-maturity, cost	6.04%	7.18%
Due in 5-10 years, Contractual maturities, held-to-maturity, cost	$ 1,188	$ 695
Percentage of weighted average yield, Due In 5-10 years, held-to-maturity, cost	4.91%	6.31%
Due in 10 years or more, Contractual maturities, held-to-maturity, cost	$ 5,026	$ 5,568
Percentage of weighted average yield, Due after 10 years, held-to-maturity, cost	4.92%	5.98%
Held-to-maturity securities, at fair value:
Contractual maturities, Total amount, held-to-maturity, fair value	$ 6,200	$ 6,354
Due within 1 year, Contractual maturities, held-to-maturity, at fair value	0	0
Due in 1-5 years, Contractual maturities, held-to-maturity, at fair value	70	49
Due in 5-10 years, Contractual maturities, held-to-maturity, at fair value	1,191	701
Due in 10 years or more, Contractual maturities, held-to-maturity, at fair value	4,939	5,604
Total mortgage-backed securities [Member]
Available-for-sale securities:
Contractual maturities, Total amount, available-for-sale	$ 160,203	$ 169,392
Weighted average yield contractual maturities, Total, available-for-sale	3.44%	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	$ 183	$ 234
Percentage of weighted average yield, Due in 1-5 years, available-for-sale	3.70%	3.35%
Due in 5-10 years, Contractual maturities, available-for-sale	$ 2,257	$ 5,711
Percentage of weighted average yield, Due In 5-10 years, available-for-sale	2.72%	2.82%
Due in 10 years or more, Contractual maturities, available-for-sale	$ 157,763	$ 163,432
Percentage of weighted average yield, Due after 10 years, available-for-sale	3.45%	3.30%
Federal agencies [Member]
Available-for-sale securities:
Contractual maturities, Total amount, available-for-sale	$ 153,203	$ 160,219
Weighted average yield contractual maturities, Total, available-for-sale	3.42%	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	$ 169	$ 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	$ 1,909	$ 5,534
Percentage of weighted average yield, Due In 5-10 years, available-for-sale	2.56%	2.82%
Due in 10 years or more, Contractual maturities, available-for-sale	$ 151,125	$ 154,460
Percentage of weighted average yield, Due after 10 years, available-for-sale	3.43%	3.28%
Held-to-maturity securities:
Held-to-maturity Securities, Amortized Cost	$ 93,685	$ 87,527
Weighted average yield contractual maturities, Total, held-to-maturity, cost	3.10%	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%
Due in 1-5 years, Contractual maturities, held-to-maturity, cost	$ 26	$ 15
Percentage of weighted average yield, Due In 1-5 years, held-to-maturity, cost	3.52%	2.81%
Due in 5-10 years, Contractual maturities, held-to-maturity, cost	$ 0	$ 11
Percentage of weighted average yield, Due In 5-10 years, held-to-maturity, cost	0.00%	2.49%
Due in 10 years or more, Contractual maturities, held-to-maturity, cost	$ 93,659	$ 87,501
Percentage of weighted average yield, Due after 10 years, held-to-maturity, cost	3.10%	3.11%
Held-to-maturity securities, at fair value:
Contractual maturities, Total amount, held-to-maturity, fair value	$ 91,509	$ 87,046
Due within 1 year, Contractual maturities, held-to-maturity, at fair value	0	0
Due in 1-5 years, Contractual maturities, held-to-maturity, at fair value	26	15
Due in 5-10 years, Contractual maturities, held-to-maturity, at fair value	0	11
Due in 10 years or more, Contractual maturities, held-to-maturity, at fair value	91,483	87,020
Residential [Member]
Available-for-sale securities:
Contractual maturities, Total amount, available-for-sale	$ 2,775	$ 4,608
Weighted average yield contractual maturities, Total, available-for-sale	4.01%	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	$ 14	$ 24
Percentage of weighted average yield, Due in 1-5 years, available-for-sale	5.85%	5.67%
Due in 5-10 years, Contractual maturities, available-for-sale	$ 6	$ 11
Percentage of weighted average yield, Due In 5-10 years, available-for-sale	3.04%	2.46%
Due in 10 years or more, Contractual maturities, available-for-sale	$ 2,755	$ 4,573
Percentage of weighted average yield, Due after 10 years, available-for-sale	4.00%	3.51%
Commercial [Member]
Available-for-sale securities:
Contractual maturities, Total amount, available-for-sale	$ 4,225	$ 4,565
Weighted average yield contractual maturities, Total, available-for-sale	3.64%	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	$ 342	$ 166
Percentage of weighted average yield, Due In 5-10 years, available-for-sale	3.60%	2.69%
Due in 10 years or more, Contractual maturities, available-for-sale	$ 3,883	$ 4,399
Percentage of weighted average yield, Due after 10 years, available-for-sale	3.65%	3.48%
Corporate debt securities [Member]
Available-for-sale securities:
Contractual maturities, Total amount, available-for-sale	$ 6,271	$ 7,666
Weighted average yield contractual maturities, Total, available-for-sale	5.11%	5.12%
Due within 1 year, Contractual maturities, available-for-sale	$ 390	$ 443
Percentage of weighted average yield, Due within 1 year, available-for-sale	6.27%	5.54%
Due in 1-5 years, Contractual maturities, available-for-sale	$ 2,525	$ 2,738
Percentage of weighted average yield, Due in 1-5 years, available-for-sale	5.25%	5.56%
Due in 5-10 years, Contractual maturities, available-for-sale	$ 2,743	$ 3,549
Percentage of weighted average yield, Due In 5-10 years, available-for-sale	4.68%	4.70%
Due in 10 years or more, Contractual maturities, available-for-sale	$ 613	$ 936
Percentage of weighted average yield, Due after 10 years, available-for-sale	5.67%	5.26%
Collateralized loan obligations [Member]
Available-for-sale securities:
Contractual maturities, Total amount, available-for-sale	$ 35,343	$ 36,056
Weighted average yield contractual maturities, Total, available-for-sale	3.89%	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	$ 28	$ 50
Percentage of weighted average yield, Due in 1-5 years, available-for-sale	4.18%	1.68%
Due in 5-10 years, Contractual maturities, available-for-sale	$ 8,866	$ 15,008
Percentage of weighted average yield, Due In 5-10 years, available-for-sale	3.91%	2.96%
Due in 10 years or more, Contractual maturities, available-for-sale	$ 26,449	$ 20,998
Percentage of weighted average yield, Due after 10 years, available-for-sale	3.89%	3.00%
Held-to-maturity securities:
Held-to-maturity Securities, Amortized Cost	$ 66	$ 661
Weighted average yield contractual maturities, Total, held-to-maturity, cost	3.62%	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%
Due in 1-5 years, Contractual maturities, held-to-maturity, 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	$ 66	$ 661
Percentage of weighted average yield, Due In 5-10 years, held-to-maturity, cost	3.62%	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, at fair value:
Contractual maturities, Total amount, held-to-maturity, fair value	$ 66	$ 665
Due within 1 year, Contractual maturities, held-to-maturity, at fair value	0	0
Due in 1-5 years, Contractual maturities, held-to-maturity, at fair value	0	0
Due in 5-10 years, Contractual maturities, held-to-maturity, at fair value	66	665
Due in 10 years or more, Contractual maturities, held-to-maturity, at fair value	0	0
Other [Member]
Available-for-sale securities:
Contractual maturities, Total amount, available-for-sale	$ 5,483	$ 5,648
Weighted average yield contractual maturities, Total, available-for-sale	3.17%	2.46%
Due within 1 year, Contractual maturities, available-for-sale	$ 15	$ 71
Percentage of weighted average yield, Due within 1 year, available-for-sale	6.02%	3.56%
Due in 1-5 years, Contractual maturities, available-for-sale	$ 818	$ 463
Percentage of weighted average yield, Due in 1-5 years, available-for-sale	3.84%	2.72%
Due in 5-10 years, Contractual maturities, available-for-sale	$ 1,446	$ 1,466
Percentage of weighted average yield, Due In 5-10 years, available-for-sale	2.17%	2.13%
Due in 10 years or more, Contractual maturities, available-for-sale	$ 3,204	$ 3,648
Percentage of weighted average yield, Due after 10 years, available-for-sale	3.44%	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%
Due in 1-5 years, Contractual maturities, held-to-maturity, 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, at fair value:
Contractual maturities, Total amount, held-to-maturity, fair value	$ 0	$ 114
Due within 1 year, Contractual maturities, held-to-maturity, at fair value	0	0
Due in 1-5 years, Contractual maturities, held-to-maturity, at fair value	0	114
Due in 5-10 years, Contractual maturities, held-to-maturity, at fair value	0	0
Due in 10 years or more, Contractual maturities, held-to-maturity, at fair value	$ 0	$ 0
[1]	(2)Financial information for the prior period has been revised to reflect presentation changes in connection with our 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	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Available-For-Sale Debt Securities, Realized Gain (Loss) [Abstract]
Gross realized gains	$ 155	$ 948	$ 1,234
Gross realized losses	(19)	(207)	(103)
OTTI write-downs	(28)	(262)	(189)
Net realized gains from available-for-sale debt securities	$ 108	$ 479	$ 942

AFS and HTM Debt Securities, OT

AFS and HTM Debt Securities, OTTI Included in Earnings (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Schedule Of Available-For-Sale Debt Securities [Line Items]
Other-than-temporary Impairment Loss, Debt Securities, Held-to-maturity, before Tax	$ 0	$ 0	$ 0
Debt securities [Member]
OTTI write-downs included in earnings
Total debt securities (1)	28	262	189
Securities of U.S. states and political subdivisions [Member]
OTTI write-downs included in earnings
Total debt securities (1)	2	150	63
Residential [Member]
OTTI write-downs included in earnings
Total debt securities (1)	4	11	34
Commercial [Member]
OTTI write-downs included in earnings
Total debt securities (1)	18	80	14
Corporate debt securities [Member]
OTTI write-downs included in earnings
Total debt securities (1)	0	21	72
Other [Member]
OTTI write-downs included in earnings
Total debt securities (1)	$ 4	$ 0	$ 6

AFS and HTM Debt Securities, _2

AFS and HTM Debt Securities, OTTI Debt Securities (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Debt securities [Member]
OTTI on debt securities (Abstract)
Total OTTI recorded as part of gross realized losses	$ 28	$ 262	$ 189
Total changes to OCI for non-credit-related OTTI	(11)	(57)	18
Total OTTI losses (reversal of losses) recorded on debt securities	17	205	207
Securities of U.S. states and political subdivisions [Member]
OTTI on debt securities (Abstract)
Total OTTI recorded as part of gross realized losses	2	150	63
Total changes to OCI for non-credit-related OTTI	(2)	(5)	8
Residential [Member]
OTTI on debt securities (Abstract)
Total OTTI recorded as part of gross realized losses	4	11	34
Total changes to OCI for non-credit-related OTTI	2	(1)	(3)
Commercial [Member]
OTTI on debt securities (Abstract)
Total OTTI recorded as part of gross realized losses	18	80	14
Total changes to OCI for non-credit-related OTTI	(11)	(51)	24
Corporate debt securities [Member]
OTTI on debt securities (Abstract)
Total OTTI recorded as part of gross realized losses	0	21	72
Total changes to OCI for non-credit-related OTTI	0	1	(13)
Other [Member]
OTTI on debt securities (Abstract)
Total OTTI recorded as part of gross realized losses	4	0	6
Total changes to OCI for non-credit-related OTTI	0	(1)	2
Credit-related OTTI [Member] | Debt securities [Member]
OTTI on debt securities (Abstract)
Total OTTI recorded as part of gross realized losses	27	119	143
Intent-to-sell OTTI [Member] | Debt securities [Member]
OTTI on debt securities (Abstract)
Total OTTI recorded as part of gross realized losses	$ 1	$ 143	$ 46

AFS ad HTM Debt Securities, Cre

AFS ad HTM Debt Securities, Credit Loss Component (Details) - Debt securities [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward]
Credit loss recognized, beginning of year	$ 742	$ 1,043	$ 1,092
Additions:
For securities with initial credit impairments	1	9	85
For securities with previous credit impairments	26	110	58
Total additions	27	119	143
Reductions:
For securities sold, matured, or intended/required to be sold	(204)	(414)	(184)
For recoveries of previous credit impairments	(3)	(6)	(8)
Total reductions	(207)	(420)	(192)
Credit loss recognized, end of year	$ 562	$ 742	$ 1,043

Loans and Allowance for Credi_3

Loans and Allowance for Credit Losses, Loans Outstanding (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2008	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Deferred Income	$ 1,300		$ 3,900
Loans	953,110	[1]	956,770	[1]		$ 967,604	$ 916,559	$ 862,551
Unfunded Credit Commitments, Consumer Mortgage First and Junior Lines of Credit Portfolio	60,100
Commercial Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	350,199		333,125			330,840	299,892	271,795
Total Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	513,405		503,388			506,536	456,583	414,826
Commercial Real Estate Mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	121,014		126,599			132,491	122,160	111,996
Commercial Real Estate Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	22,496		24,279			23,916	22,164	18,728
Lease Financing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	19,696		19,385			19,289	12,367	12,307
Total Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	439,705		453,382			461,068	459,976	447,725
Real estate 1-4 family first mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	285,065		284,054			275,579	273,869	265,386
Real estate 1-4 family junior lien mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	34,398		39,713			46,237	53,004	59,717
Credit Card [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	39,025		37,976			36,700	34,039	31,119
Automobile [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	45,069		53,371			62,286	59,966	55,740
Other revolving credit and installment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	36,148		38,268			40,266	39,098	35,763
Consumer Mortgage First and Junior Lines of Credit [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans And Leases Receivable, Gross, Consumer Mortgage First and Junior Lines of Credit	43,600
Loans and Leases Receivable, Consumer Mortgage First and Junior Lines of Credit, Amount in Amortization Period	$ 11,100
Loans and Leases Receivable, Consumer Mortgage First and Junior Lines of Credit, Percentage in Amortization Period	25.00%
Loans and Leases Receivable, Consumer Mortgage First and Junior Lines of Credit, Amount to Enter Amortization Period In Next Two Years	$ 1,300
Loans and Leases Receivable, Consumer Mortgage First and Junior Lines of Credit, Percentage to Enter Amortization Period In Next Two Years	3.00%
Loans and Leases Receivable, Consumer Mortgage First and Junior Lines of Credit, Amount to Enter Amortization Period In Two To Four Years	$ 11,300
Loans and Leases Receivable, Consumer Mortgage First and Junior Lines of Credit, Percentage to Enter Amortization Period In Two To Four Years	26.00%
Loans and Leases Receivable, Consumer Mortgage First and Junior Lines of Credit, Amount to Enter Amortization Period After Four Years	$ 19,900
Loans and Leases Receivable, Consumer Mortgage First and Junior Lines of Credit, Percentage to Enter Amortization Period After Four Years	46.00%
Consumer Mortgage First and Junior Lines of Credit, Amortization Period [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Consumer Mortgage First and Junior Lines of Credit, Amount Thirty or More Days Past Due	$ 488
Loans and Leases Receivable, Consumer Mortgage First and Junior Lines of Credit, Percentage Thirty or More Days Past Due	4.00%
Consumer Mortgage First and Junior Lines of Credit, Draw Period [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Consumer Mortgage First and Junior Lines of Credit, Amount Thirty or More Days Past Due	$ 553
Loans and Leases Receivable, Consumer Mortgage First and Junior Lines of Credit, Percentage Thirty or More Days Past Due	2.00%
Geographic Distribution, Foreign [Member] | Commercial Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 62,564		60,106			55,396	49,049	44,707
Geographic Distribution, Foreign [Member] | Total Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	71,465		69,920			65,284	58,117	50,037
Geographic Distribution, Foreign [Member] | Commercial Real Estate Mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	6,731		8,033			8,541	8,350	4,776
Geographic Distribution, Foreign [Member] | Commercial Real Estate Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	1,011		655			375	444	218
Geographic Distribution, Foreign [Member] | Lease Financing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 1,159		$ 1,126			$ 972	$ 274	$ 336
Product Concentration Risk [Member] | Loans And Leases Receivable [Member] | Commercial and industrial loans and lease financing, domestic [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration Risk, Percentage, Threshold	10.00%		10.00%
Product Concentration Risk [Member] | Loans And Leases Receivable [Member] | Commercial Real Estate Mortgage and Construction Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration Risk, Percentage, Threshold	10.00%		10.00%
Acquired Consumer Mortgage Loan Portfolio [Member] | Loans And Leases Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk, percentage	1.00%				10.00%
Residential Mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 319,463		$ 323,767
Residential Mortgage [Member] | Interest-only Loans [Member] | Loans And Leases Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk, percentage	4.00%		4.00%
CALIFORNIA | Residential Mortgage [Member] | Real Estate 1-4 Family Mortgage Loans Non PCI [Member] | Loans And Leases Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk, percentage	12.00%		12.00%
California, Larger Metropolitan Areas [Member] | Residential Mortgage [Member] | Real Estate 1-4 Family Mortgage Loans [Member] | Loans And Leases Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration Risk, Percentage, Threshold	5.00%		5.00%
Financing Receivable Acquired With Deteriorated Credit Quality [Member] | CALIFORNIA | Residential Mortgage [Member] | Real Estate 1-4 Family Mortgage Loans [Member] | Loans And Leases Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk, percentage	1.00%		1.00%
Junior Lien Line Of Credit [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Draw Period, Low Range	10 years
Financing Receivable, Draw Period, Mid Range	15 years
Financing Receivable, Draw Period, High Range	20 years
Financing Receivable, Draw Period Repayment Option, Percentage Of Total Outstanding Balance	1.50%
First Lien Line Of Credit [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Draw Period, Low Range	10 years
Financing Receivable, Draw Period, Mid Range	15 years
Financing Receivable, Draw Period, High Range	20 years
Financing Receivable, Draw Period Repayment Option, Percentage Of Total Outstanding Balance	1.50%
Minimum [Member] | Junior Lien Line Of Credit [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Draw Period Repayment Option, Interest-Only Payments, Fixed Period	3 years
Financing Receivable, Draw Period Repayment Option, Fully Amortizing Payment Fixed Period	5 years
Minimum [Member] | First Lien Line Of Credit [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Draw Period Repayment Option, Interest-Only Payments, Fixed Period	3 years
Financing Receivable, Draw Period Repayment Option, Fully Amortizing Payment Fixed Period	5 years
Maximum [Member] | Junior Lien Line Of Credit [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Draw Period Repayment Option, Interest-Only Payments, Fixed Period	7 years
Financing Receivable, Draw Period Repayment Option, Fully Amortizing Payment Fixed Period	30 years
Financing Receivable, End Of Draw Period Repayment Option, Repayment Terms, Period	30 years
Maximum [Member] | First Lien Line Of Credit [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Draw Period Repayment Option, Interest-Only Payments, Fixed Period	7 years
Financing Receivable, Draw Period Repayment Option, Fully Amortizing Payment Fixed Period	30 years
Financing Receivable, End Of Draw Period Repayment Option, Repayment Terms, Period	30 years
[1]	(3)Parenthetical amounts represent assets and liabilities that 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	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2008
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unfunded Credit Commitments, Consumer Mortgage First and Junior Lines of Credit Portfolio	$ 60,100
Loans and Allowance for Credit Losses, Significant Activity [Abstract]
Purchases	2,081	$ 3,677
Sales	(2,166)	(2,491)
Transfers to MLHFS/LHFS	(2,612)	(738)
Commercial Portfolio Segment [Member]
Loans and Allowance for Credit Losses, Significant Activity [Abstract]
Purchases	2,065	3,675
Sales	(1,905)	(2,066)
Transfers to MLHFS/LHFS	(617)	(736)
Consumer Portfolio Segment [Member]
Loans and Allowance for Credit Losses, Significant Activity [Abstract]
Purchases	16	2
Sales	(261)	(425)
Transfers to MLHFS/LHFS	$ (1,995)	$ (2)
First Lien Line Of Credit [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Draw Period, Low Range	10 years
Loans and Allowance for Credit Losses, Significant Activity [Abstract]
Financing Receivable, Draw Period, Mid Range	15 years
Financing Receivable, Draw Period, High Range	20 years
Financing Receivable, Draw Period Repayment Option, Percentage Of Total Outstanding Balance	1.50%
Loans And Leases Receivable [Member] | Acquired Consumer Mortgage Loan Portfolio [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk, percentage	1.00%		10.00%
Residential Mortgage [Member] | Loans And Leases Receivable [Member] | Interest-only Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk, percentage	4.00%	4.00%
California, Larger Metropolitan Areas [Member] | Residential Mortgage [Member] | Loans And Leases Receivable [Member] | Real Estate 1-4 Family Mortgage Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration Risk, Percentage, Threshold	5.00%	5.00%

Loans and Allowance for Credi_5

Loans and Allowance for Credit Losses, Commitments to Lend (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2008
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Temporary Advance Arrangements	$ 91,000	$ 85,000
Total unfunded credit commitments	558,701	555,511
Total Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total unfunded credit commitments	353,876	350,732
Commercial and Industrial Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unused Commitments to Extend Credit	330,492	326,626
Commercial Real Estate Mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unused Commitments to Extend Credit	6,984	7,485
Commercial Real Estate Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unused Commitments to Extend Credit	16,400	16,621
Total Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total unfunded credit commitments	204,825	204,779
Real estate 1-4 family first mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unused Commitments to Extend Credit	29,736	29,876
Real estate 1-4 family junior lien mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unused Commitments to Extend Credit	37,719	38,897
Credit Card [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unused Commitments to Extend Credit	109,840	108,465
Other revolving credit and installment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unused Commitments to Extend Credit	$ 27,530	$ 27,541
Acquired Consumer Mortgage Loan Portfolio [Member] | Loans And Leases Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk, percentage	1.00%		10.00%
Residential Mortgage [Member] | Interest-only Loans [Member] | Loans And Leases Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk, percentage	4.00%	4.00%
California, Larger Metropolitan Areas [Member] | Residential Mortgage [Member] | Real Estate 1-4 Family Mortgage Loans [Member] | Loans And Leases Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration Risk, Percentage, Threshold	5.00%	5.00%
International [Member] | Total Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Letters of Credit Outstanding, Amount	$ 919	$ 982
Financing Receivable Acquired With Deteriorated Credit Quality [Member] | CALIFORNIA | Residential Mortgage [Member] | Real Estate 1-4 Family Mortgage Loans [Member] | Loans And Leases Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk, percentage	1.00%	1.00%
First Lien Line Of Credit [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Draw Period, Low Range	10 years
Financing Receivable, Draw Period, Mid Range	15 years
Financing Receivable, Draw Period, High Range	20 years
Financing Receivable, Draw Period Repayment Option, Percentage Of Total Outstanding Balance	1.50%
Minimum [Member] | First Lien Line Of Credit [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Draw Period Repayment Option, Interest-Only Payments, Fixed Period	3 years
Financing Receivable, Draw Period Repayment Option, Fully Amortizing Payment Fixed Period	5 years
Maximum [Member] | First Lien Line Of Credit [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Draw Period Repayment Option, Interest-Only Payments, Fixed Period	7 years
Financing Receivable, Draw Period Repayment Option, Fully Amortizing Payment Fixed Period	30 years
Financing Receivable, End Of Draw Period Repayment Option, Repayment Terms, Period	30 years

Loans and Allowance for Credi_6

Loans and Allowance for Credit Losses, Allowance for Credit Losses (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for credit losses, beginning balance	$ 11,960	$ 12,540	$ 12,512	$ 13,169	$ 14,971
Provision for credit losses	1,744	2,528	3,770	2,442	1,395
Interest income on certain impaired loans	(166)	(186)	(205)	(198)	(211)
Loan charge-offs	(4,428)	(4,587)	(5,247)	(4,454)	(4,724)
Loan recoveries	1,684	1,659	1,727	1,562	1,779
Net loan charge-offs	(2,744)	(2,928)	(3,520)	(2,892)	(2,945)
Other	(87)	6	(17)	(9)	(41)
Allowance for credit losses, ending balance	10,707	11,960	12,540	12,512	13,169
Components:
Allowance for loan losses						$ 9,775	$ 11,004	$ 11,419	$ 11,545	$ 12,319
Allowance for unfunded credit commitments						932	956	1,121	967	850
Total allowance for credit losses	$ 11,960	$ 12,540	$ 12,512	$ 13,169	$ 14,971	$ 10,707	$ 11,960	$ 12,540	$ 12,512	$ 13,169
Net loan charge-offs as a percentage of average total loans	0.29%	0.31%	0.37%	0.33%	0.35%
Allowance for loan losses as a percentage of total loans						1.03%	1.15%	1.18%	1.26%	1.43%
Allowance for credit losses as a percentage of total loans						1.12%	1.25%	1.30%	1.37%	1.53%
Total Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for credit losses, beginning balance	$ 6,632	$ 7,394
Provision for credit losses	281	(261)
Interest income on certain impaired loans	(47)	(59)
Loan charge-offs	(839)	(872)	$ (1,488)	$ (811)	$ (717)
Loan recoveries	410	426	428	424	673
Net loan charge-offs	(429)	(446)
Other	(20)	4
Allowance for credit losses, ending balance	6,417	6,632	7,394
Components:
Total allowance for credit losses	6,632	7,394	7,394			$ 6,417	$ 6,632	$ 7,394
Commercial and Industrial Loans [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Loan charge-offs	(727)	(789)	(1,419)	(734)	(627)
Loan recoveries	304	297	263	252	369
Commercial Real Estate Mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Loan charge-offs	(42)	(38)	(27)	(59)	(66)
Loan recoveries	70	82	116	127	160
Commercial Real Estate Construction [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Loan charge-offs	0	0	(1)	(4)	(9)
Loan recoveries	13	30	38	37	136
Lease Financing [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Loan charge-offs	(70)	(45)	(41)	(14)	(15)
Loan recoveries	23	17	11	8	8
Total Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for credit losses, beginning balance	5,328	5,146
Provision for credit losses	1,463	2,789
Interest income on certain impaired loans	(119)	(127)
Loan charge-offs	(3,589)	(3,715)	(3,759)	(3,643)	(4,007)
Loan recoveries	1,274	1,233	1,299	1,138	1,106
Net loan charge-offs	(2,315)	(2,482)
Other	(67)	2
Allowance for credit losses, ending balance	4,290	5,328	5,146
Components:
Total allowance for credit losses	5,328	5,146	5,146			$ 4,290	$ 5,328	$ 5,146
Real estate 1-4 family first mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Loan charge-offs	(179)	(240)	(452)	(507)	(721)
Loan recoveries	267	288	373	245	212
Real estate 1-4 family junior lien mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Loan charge-offs	(179)	(279)	(495)	(635)	(864)
Loan recoveries	219	266	266	259	238
Credit Card [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Loan charge-offs	(1,599)	(1,481)	(1,259)	(1,116)	(1,025)
Loan recoveries	307	239	207	175	161
Automobile [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Loan charge-offs	(947)	(1,002)	(845)	(742)	(729)
Loan recoveries	363	319	325	325	349
Other revolving credit and installment [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Loan charge-offs	(685)	(713)	(708)	(643)	(668)
Loan recoveries	$ 118	$ 121	$ 128	$ 134	$ 146

Loans and Allowance for Credi_7

Loans and Allowance for Credit Losses, Allowance for Credit Losses by Category (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for credit losses, beginning balance	$ 11,960	$ 12,540	$ 12,512	$ 13,169	$ 14,971
Provision for credit losses	1,744	2,528	3,770	2,442	1,395
Interest income on certain impaired loans	(166)	(186)	(205)	(198)	(211)
Loan charge-offs	(4,428)	(4,587)	(5,247)	(4,454)	(4,724)
Loan recoveries	1,684	1,659	1,727	1,562	1,779
Net loan charge-offs	(2,744)	(2,928)	(3,520)	(2,892)	(2,945)
Allowance related to business combinations/other	(87)	6	(17)	(9)	(41)
Allowance for credit losses, ending balance	10,707	11,960	12,540	12,512	13,169
Commercial Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for credit losses, beginning balance	6,632	7,394
Provision for credit losses	281	(261)
Interest income on certain impaired loans	(47)	(59)
Loan charge-offs	(839)	(872)	(1,488)	(811)	(717)
Loan recoveries	410	426	428	424	673
Net loan charge-offs	(429)	(446)
Allowance related to business combinations/other	(20)	4
Allowance for credit losses, ending balance	6,417	6,632	7,394
Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Allowance for credit losses, beginning balance	5,328	5,146
Provision for credit losses	1,463	2,789
Interest income on certain impaired loans	(119)	(127)
Loan charge-offs	(3,589)	(3,715)	(3,759)	(3,643)	(4,007)
Loan recoveries	1,274	1,233	1,299	$ 1,138	$ 1,106
Net loan charge-offs	(2,315)	(2,482)
Allowance related to business combinations/other	(67)	2
Allowance for credit losses, ending balance	$ 4,290	$ 5,328	$ 5,146

Loans and Allowance for Credi_8

Loans and Allowance for Credit Losses, Loans by Credit Impairment Methodology (Details) - USD ($) $ in Millions	Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Loans and Allowance for Credit Losses, by Credit Impairment Method [Abstract]
Allowance for Credit Losses, Collectively evaluated	$ 9,264		$ 10,070
Allowance for Credit Losses, Individually evaluated	1,443		1,890
Total allowance for credit losses	10,707		11,960		$ 12,540	$ 12,512	$ 13,169	$ 14,971
Financing Receivable, Collectively evaluated	931,754		925,261
Financing Receivable, Individually evaluated	16,347		18,674
Loans	953,110	[1]	956,770	[1]	967,604	916,559	862,551
Commercial Portfolio Segment [Member]
Loans and Allowance for Credit Losses, by Credit Impairment Method [Abstract]
Allowance for Credit Losses, Collectively evaluated	5,903		5,927
Allowance for Credit Losses, Individually evaluated	514		705
Total allowance for credit losses	6,417		6,632		7,394
Financing Receivable, Collectively evaluated	510,180		499,342
Financing Receivable, Individually evaluated	3,221		3,960
Loans	513,405		503,388		506,536	456,583	414,826
Consumer Portfolio Segment [Member]
Loans and Allowance for Credit Losses, by Credit Impairment Method [Abstract]
Allowance for Credit Losses, Collectively evaluated	3,361		4,143
Allowance for Credit Losses, Individually evaluated	929		1,185
Total allowance for credit losses	4,290		5,328		5,146
Financing Receivable, Collectively evaluated	421,574		425,919
Financing Receivable, Individually evaluated	13,126		14,714
Loans	439,705		453,382		$ 461,068	$ 459,976	$ 447,725
SEC Schedule, 12-09, Allowance, Credit Loss [Member]
Loans and Allowance for Credit Losses, by Credit Impairment Method [Abstract]
Total allowance for credit losses	0		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	0		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
PCI Loans Carrying Value [Member]
Loans and Allowance for Credit Losses, by Credit Impairment Method [Abstract]
Financing Receivable, Recorded Investment, Current	5,009		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	4		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	$ 5,005		$ 12,749
[1]	(3)Parenthetical amounts represent assets and liabilities that 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	Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2008
Loans and Leases Receivable Disclosure [Abstract]
Loans	$ 953,110	[1]	$ 956,770	[1]	$ 967,604	$ 916,559	$ 862,551
Total Commercial [Member]
Loans and Leases Receivable Disclosure [Abstract]
Loans	513,405		503,388		506,536	456,583	414,826
Commercial and Industrial Loans [Member]
Loans and Leases Receivable Disclosure [Abstract]
Loans	350,199		333,125		330,840	299,892	271,795
Commercial Real Estate Mortgage [Member]
Loans and Leases Receivable Disclosure [Abstract]
Loans	121,014		126,599		132,491	122,160	111,996
Commercial Real Estate Construction [Member]
Loans and Leases Receivable Disclosure [Abstract]
Loans	22,496		24,279		23,916	22,164	18,728
Lease Financing [Member]
Loans and Leases Receivable Disclosure [Abstract]
Loans	19,696		19,385		$ 19,289	$ 12,367	$ 12,307
Loans Excluding Purchased Credit-Impaired Loans [Member]
Loans and Leases Receivable Disclosure [Abstract]
Financing Receivable, Recorded Investment, Nonaccrual Status	6,496		7,646
Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial Real Estate Mortgage and Construction Loans [Member] | Criticized [Member]
Loans and Leases Receivable Disclosure [Abstract]
Loans	4,800
Financing Receivable, Recorded Investment, Nonaccrual Status	612
Loans Excluding Purchased Credit-Impaired Loans [Member] | Total Commercial [Member]
Loans and Leases Receivable Disclosure [Abstract]
Loans	513,401		503,302
Financing Receivable, Recorded Investment, Nonaccrual Status	2,188		2,640
Loans Excluding Purchased Credit-Impaired Loans [Member] | Total Commercial [Member] | Pass [Member]
Loans and Leases Receivable Disclosure [Abstract]
Loans	492,804		480,886
Loans Excluding Purchased Credit-Impaired Loans [Member] | Total Commercial [Member] | Criticized [Member]
Loans and Leases Receivable Disclosure [Abstract]
Loans	20,597		22,416
Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial and Industrial Loans [Member]
Loans and Leases Receivable Disclosure [Abstract]
Loans	350,195		333,039
Financing Receivable, Recorded Investment, Nonaccrual Status	1,486		1,899
Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial and Industrial Loans [Member] | Pass [Member]
Loans and Leases Receivable Disclosure [Abstract]
Loans	335,412		316,431
Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial and Industrial Loans [Member] | Criticized [Member]
Loans and Leases Receivable Disclosure [Abstract]
Loans	14,783		16,608
Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial Real Estate Mortgage [Member]
Loans and Leases Receivable Disclosure [Abstract]
Loans	121,014		126,599
Financing Receivable, Recorded Investment, Nonaccrual Status	580		628
Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial Real Estate Mortgage [Member] | Pass [Member]
Loans and Leases Receivable Disclosure [Abstract]
Loans	116,514		122,312
Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial Real Estate Mortgage [Member] | Criticized [Member]
Loans and Leases Receivable Disclosure [Abstract]
Loans	4,500		4,287
Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial Real Estate Construction [Member]
Loans and Leases Receivable Disclosure [Abstract]
Loans	22,496		24,279
Financing Receivable, Recorded Investment, Nonaccrual Status	32		37
Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial Real Estate Construction [Member] | Pass [Member]
Loans and Leases Receivable Disclosure [Abstract]
Loans	22,207		23,981
Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial Real Estate Construction [Member] | Criticized [Member]
Loans and Leases Receivable Disclosure [Abstract]
Loans	289		298
Loans Excluding Purchased Credit-Impaired Loans [Member] | Lease Financing [Member]
Loans and Leases Receivable Disclosure [Abstract]
Loans	19,696		19,385
Financing Receivable, Recorded Investment, Nonaccrual Status	90		76
Loans Excluding Purchased Credit-Impaired Loans [Member] | Lease Financing [Member] | Pass [Member]
Loans and Leases Receivable Disclosure [Abstract]
Loans	18,671		18,162
Loans Excluding Purchased Credit-Impaired Loans [Member] | Lease Financing [Member] | Criticized [Member]
Loans and Leases Receivable Disclosure [Abstract]
Loans	1,025		1,223
PCI Loans Carrying Value [Member]
Loans and Leases Receivable Disclosure [Abstract]
Total PCI loans (carrying value)	5,009		12,835
PCI Loans Carrying Value [Member] | Total Commercial [Member]
Loans and Leases Receivable Disclosure [Abstract]
Total PCI loans (carrying value)	4		86					$ 18,700
PCI Loans Carrying Value [Member] | Commercial and Industrial Loans [Member]
Loans and Leases Receivable Disclosure [Abstract]
Total PCI loans (carrying value)	4		86
PCI Loans Carrying Value [Member] | Commercial Real Estate Mortgage [Member]
Loans and Leases Receivable Disclosure [Abstract]
Total PCI loans (carrying value)	0		0
PCI Loans Carrying Value [Member] | Commercial Real Estate Construction [Member]
Loans and Leases Receivable Disclosure [Abstract]
Total PCI loans (carrying value)	0		0
PCI Loans Carrying Value [Member] | Lease Financing [Member]
Loans and Leases Receivable Disclosure [Abstract]
Total PCI loans (carrying value)	$ 0		$ 0
[1]	(3)Parenthetical amounts represent assets and liabilities that 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	Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2008
By delinquency status:
Loans	$ 953,110	[1]	$ 956,770	[1]	$ 967,604	$ 916,559	$ 862,551
Total Commercial [Member]
By delinquency status:
Loans	513,405		503,388		506,536	456,583	414,826
Commercial and Industrial Loans [Member]
By delinquency status:
Loans	350,199		333,125		330,840	299,892	271,795
Commercial Real Estate Mortgage [Member]
By delinquency status:
Loans	121,014		126,599		132,491	122,160	111,996
Commercial Real Estate Construction [Member]
By delinquency status:
Loans	22,496		24,279		23,916	22,164	18,728
Lease Financing [Member]
By delinquency status:
Loans	19,696		19,385		$ 19,289	$ 12,367	$ 12,307
Loans Excluding Purchased Credit-Impaired Loans [Member]
By delinquency status:
Loans, 90 days or more past due and still accruing	8,704		11,532
Nonaccrual loans	6,496		7,646
Loans Excluding Purchased Credit-Impaired Loans [Member] | Total Commercial [Member]
By delinquency status:
Loans, 90 days or more past due and still accruing	94		49
Nonaccrual loans	2,188		2,640
Loans	513,401		503,302
Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial and Industrial Loans [Member]
By delinquency status:
Nonaccrual loans	1,486		1,899
Loans	350,195		333,039
Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial Real Estate Mortgage [Member]
By delinquency status:
Nonaccrual loans	580		628
Loans	121,014		126,599
Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial Real Estate Construction [Member]
By delinquency status:
Nonaccrual loans	32		37
Loans	22,496		24,279
Loans Excluding Purchased Credit-Impaired Loans [Member] | Lease Financing [Member]
By delinquency status:
Nonaccrual loans	90		76
Loans	19,696		19,385
PCI Loans Carrying Value [Member]
By delinquency status:
Total PCI loans (carrying value)	5,009		12,835
PCI Loans Carrying Value [Member] | Total Commercial [Member]
By delinquency status:
Total PCI loans (carrying value)	4		86					$ 18,700
PCI Loans Carrying Value [Member] | Commercial and Industrial Loans [Member]
By delinquency status:
Total PCI loans (carrying value)	4		86
PCI Loans Carrying Value [Member] | Commercial Real Estate Mortgage [Member]
By delinquency status:
Total PCI loans (carrying value)	0		0
PCI Loans Carrying Value [Member] | Commercial Real Estate Construction [Member]
By delinquency status:
Total PCI loans (carrying value)	0		0
PCI Loans Carrying Value [Member] | Lease Financing [Member]
By delinquency status:
Total PCI loans (carrying value)	0		0
Financing Receivables, 1 to 29 Days Past Due [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Total Commercial [Member]
By delinquency status:
Loans	510,188		499,216
Financing Receivables, 1 to 29 Days Past Due [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial and Industrial Loans [Member]
By delinquency status:
Loans	348,158		330,319
Financing Receivables, 1 to 29 Days Past Due [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial Real Estate Mortgage [Member]
By delinquency status:
Loans	120,176		125,642
Financing Receivables, 1 to 29 Days Past Due [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial Real Estate Construction [Member]
By delinquency status:
Loans	22,411		24,107
Financing Receivables, 1 to 29 Days Past Due [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Lease Financing [Member]
By delinquency status:
Loans	19,443		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	931		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	508		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	207		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	53		135
30-89 days past due and still accruing [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Lease Financing [Member]
By delinquency status:
Loans	163		161
Loans Excluding Government Insured or Guaranteed Loans [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member]
By delinquency status:
Loans, 90 days or more past due and still accruing	979		1,057
Loans Excluding Government Insured or Guaranteed Loans [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Total Commercial [Member]
By delinquency status:
Loans, 90 days or more past due and still accruing	94		49
Loans Excluding Government Insured or Guaranteed Loans [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial and Industrial Loans [Member]
By delinquency status:
Loans, 90 days or more past due and still accruing	43		26
Loans Excluding Government Insured or Guaranteed Loans [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial Real Estate Mortgage [Member]
By delinquency status:
Loans, 90 days or more past due and still accruing	51		23
Loans Excluding Government Insured or Guaranteed Loans [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial Real Estate Construction [Member]
By delinquency status:
Loans, 90 days or more past due and still accruing	0		0
Loans Excluding Government Insured or Guaranteed Loans [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Lease Financing [Member]
By delinquency status:
Loans, 90 days or more past due and still accruing	0		0
Criticized [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Total Commercial [Member]
By delinquency status:
Loans	20,597		22,416
Criticized [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial and Industrial Loans [Member]
By delinquency status:
Loans	14,783		16,608
Criticized [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial Real Estate Mortgage [Member]
By delinquency status:
Loans	4,500		4,287
Criticized [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial Real Estate Construction [Member]
By delinquency status:
Loans	289		298
Criticized [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Lease Financing [Member]
By delinquency status:
Loans	1,025		$ 1,223
Criticized [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Commercial Real Estate Mortgage and Construction Loans [Member]
By delinquency status:
Nonaccrual loans	612
Loans	$ 4,800
[1]	(3)Parenthetical amounts represent assets and liabilities that 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	Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2008
By delinquency status:
Loans	$ 953,110	[1]	$ 956,770	[1]	$ 967,604	$ 916,559	$ 862,551
Total Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	885		1,000
By delinquency status:
Loans	439,705		453,382		461,068	459,976	447,725
Real estate 1-4 family first mortgage [Member]
By delinquency status:
Loans	$ 285,065		$ 284,054		275,579	273,869	265,386
Financing Receivables Equal To Or Greater Than 180 Days Past Due Percentage Of Portfolio	0.30%		0.40%
Real estate 1-4 family junior lien mortgage [Member]
By delinquency status:
Loans	$ 34,398		$ 39,713		46,237	53,004	59,717
Credit Card [Member]
By delinquency status:
Loans	39,025		37,976		36,700	34,039	31,119
Automobile [Member]
By delinquency status:
Loans	45,069		53,371		62,286	59,966	55,740
Other revolving credit and installment [Member]
By delinquency status:
Loans	36,148		38,268		$ 40,266	$ 39,098	$ 35,763
Loans Excluding Purchased Credit-Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	8,704		11,532
Loans Excluding Purchased Credit-Impaired Loans [Member] | Consumer Real Estate Loans Government Guaranteed Or Insured [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	7,725		10,475
Loans Excluding Purchased Credit-Impaired Loans [Member] | Total Consumer [Member]
By delinquency status:
Loans	434,700		440,633
Loans Excluding Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family first mortgage [Member]
By delinquency status:
Loans	280,077		271,332
Financing Receivable, Recorded Investment, Equal to Greater Than 180 Days Past Due and Still Accruing	822		1,100
Loans Excluding Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family junior lien mortgage [Member]
By delinquency status:
Loans	34,381		39,686
Loans Excluding Purchased Credit-Impaired Loans [Member] | Credit Card [Member]
By delinquency status:
Loans	39,025		37,976
Loans Excluding Purchased Credit-Impaired Loans [Member] | Automobile [Member]
By delinquency status:
Loans	45,069		53,371
Loans Excluding Purchased Credit-Impaired Loans [Member] | Other revolving credit and installment [Member]
By delinquency status:
Loans	36,148		38,268
Financing Receivables, 1 to 29 Days Past Due [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Total Consumer [Member]
By delinquency status:
Loans	414,931		416,858
Financing Receivables, 1 to 29 Days Past Due [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family first mortgage [Member]
By delinquency status:
Loans	263,881		251,786
Financing Receivables, 1 to 29 Days Past Due [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family junior lien mortgage [Member]
By delinquency status:
Loans	33,644		38,746
Financing Receivables, 1 to 29 Days Past Due [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Credit Card [Member]
By delinquency status:
Loans	38,008		36,996
Financing Receivables, 1 to 29 Days Past Due [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Automobile [Member]
By delinquency status:
Loans	43,604		51,445
Financing Receivables, 1 to 29 Days Past Due [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Other revolving credit and installment [Member]
By delinquency status:
Loans	35,794		37,885
Financing Receivables, 30 to 59 Days Past Due [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Total Consumer [Member]
By delinquency status:
Loans	3,130		4,056
Financing Receivables, 30 to 59 Days Past Due [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family first mortgage [Member]
By delinquency status:
Loans	1,411		1,893
Financing Receivables, 30 to 59 Days Past Due [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family junior lien mortgage [Member]
By delinquency status:
Loans	247		336
Financing Receivables, 30 to 59 Days Past Due [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Credit Card [Member]
By delinquency status:
Loans	292		287
Financing Receivables, 30 to 59 Days Past Due [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Automobile [Member]
By delinquency status:
Loans	1,040		1,385
Financing Receivables, 30 to 59 Days Past Due [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Other revolving credit and installment [Member]
By delinquency status:
Loans	140		155
Financing Receivables, 60 to 89 Days Past Due [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Total Consumer [Member]
By delinquency status:
Loans	1,288		1,591
Financing Receivables, 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	549		742
Financing Receivables, 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
Financing Receivables, 60 to 89 Days Past Due [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Credit Card [Member]
By delinquency status:
Loans	212		201
Financing Receivables, 60 to 89 Days Past Due [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Automobile [Member]
By delinquency status:
Loans	314		392
Financing Receivables, 60 to 89 Days Past Due [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Other revolving credit and installment [Member]
By delinquency status:
Loans	87		93
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Consumer Real Estate Loans Government Guaranteed Or Insured [Member]
By delinquency status:
Loans	7,700		10,500
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Total Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	2,400		3,000
90-119 Days Past Due [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Total Consumer [Member]
By delinquency status:
Loans	712		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	257		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	74		103
90-119 Days Past Due [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Credit Card [Member]
By delinquency status:
Loans	192		192
90-119 Days Past Due [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Automobile [Member]
By delinquency status:
Loans	109		146
90-119 Days Past Due [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Other revolving credit and installment [Member]
By delinquency status:
Loans	80		80
120-179 DPD member [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Total Consumer [Member]
By delinquency status:
Loans	651		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	225		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	77		95
120-179 DPD member [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Credit Card [Member]
By delinquency status:
Loans	320		298
120-179 DPD member [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Automobile [Member]
By delinquency status:
Loans	2		3
120-179 DPD member [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Other revolving credit and installment [Member]
By delinquency status:
Loans	27		30
180 plus DPD [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Total Consumer [Member]
By delinquency status:
Loans	1,056		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	822		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	213		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	20		25
Loans Insured or Guaranteed by US Government Authorities [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Total Consumer [Member]
By delinquency status:
Loans	12,688		14,767
Loans Insured or Guaranteed by US Government Authorities [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family first mortgage [Member]
By delinquency status:
Loans	12,688		14,767
Loans Insured or Guaranteed by US Government Authorities [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family junior lien mortgage [Member]
By delinquency status:
Loans	0		0
Loans Insured or Guaranteed by US Government Authorities [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Credit Card [Member]
By delinquency status:
Loans	0		0
Loans Insured or Guaranteed by US Government Authorities [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Automobile [Member]
By delinquency status:
Loans	0		0
Loans Insured or Guaranteed by US Government Authorities [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Other revolving credit and installment [Member]
By delinquency status:
Loans	0		0
Loans held at fair value [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Total Consumer [Member]
By delinquency status:
Loans	244		376
Loans held at fair value [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family first mortgage [Member]
By delinquency status:
Loans	244		376
Loans held at fair value [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family junior lien mortgage [Member]
By delinquency status:
Loans	0		0
Loans held at fair value [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Credit Card [Member]
By delinquency status:
Loans	0		0
Loans held at fair value [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Automobile [Member]
By delinquency status:
Loans	0		0
Loans held at fair value [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Other revolving credit and installment [Member]
By delinquency status:
Loans	0		0
PCI Loans Carrying Value [Member]
By delinquency status:
Total PCI loans (carrying value)	5,009		12,835
PCI Loans Carrying Value [Member] | Total Consumer [Member]
By delinquency status:
Total PCI loans (carrying value)	5,005		12,749					$ 40,100
PCI Loans Carrying Value [Member] | Real estate 1-4 family first mortgage [Member]
By delinquency status:
Total PCI loans (carrying value)	4,988		12,722
PCI Loans Carrying Value [Member] | Real estate 1-4 family junior lien mortgage [Member]
By delinquency status:
Total PCI loans (carrying value)	17		27
PCI Loans Carrying Value [Member] | Credit Card [Member]
By delinquency status:
Total PCI loans (carrying value)	0		0
PCI Loans Carrying Value [Member] | Automobile [Member]
By delinquency status:
Total PCI loans (carrying value)	0		0
PCI Loans Carrying Value [Member] | Other revolving credit and installment [Member]
By delinquency status:
Total PCI loans (carrying value)	$ 0		$ 0
[1]	(3)Parenthetical amounts represent assets and liabilities that 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	Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2008
Loans by FICO [Abstract]
Loans	$ 953,110	[1]	$ 956,770	[1]	$ 967,604	$ 916,559	$ 862,551
Total Consumer [Member]
Loans by FICO [Abstract]
Loans	439,705		453,382		461,068	459,976	447,725
Real estate 1-4 family first mortgage [Member]
Loans by FICO [Abstract]
Loans	285,065		284,054		275,579	273,869	265,386
Real estate 1-4 family junior lien mortgage [Member]
Loans by FICO [Abstract]
Loans	34,398		39,713		46,237	53,004	59,717
Credit Card [Member]
Loans by FICO [Abstract]
Loans	39,025		37,976		36,700	34,039	31,119
Automobile Loan [Member]
Loans by FICO [Abstract]
Loans	45,069		53,371		62,286	59,966	55,740
Other revolving credit and installment [Member]
Loans by FICO [Abstract]
Loans	36,148		38,268		$ 40,266	$ 39,098	$ 35,763
Loans Excluding Purchased Credit-Impaired Loans [Member] | Total Consumer [Member]
Loans by FICO [Abstract]
Loans	434,700		440,633
Loans Excluding Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family first mortgage [Member]
Loans by FICO [Abstract]
Loans	280,077		271,332
Loans Excluding Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family junior lien mortgage [Member]
Loans by FICO [Abstract]
Loans	34,381		39,686
Loans Excluding Purchased Credit-Impaired Loans [Member] | Credit Card [Member]
Loans by FICO [Abstract]
Loans	39,025		37,976
Loans Excluding Purchased Credit-Impaired Loans [Member] | Automobile Loan [Member]
Loans by FICO [Abstract]
Loans	45,069		53,371
Loans Excluding Purchased Credit-Impaired Loans [Member] | Other revolving credit and installment [Member]
Loans by FICO [Abstract]
Loans	36,148		38,268
PCI Loans Carrying Value [Member]
Loans by FICO [Abstract]
Total PCI loans (carrying value)	5,009		12,835
PCI Loans Carrying Value [Member] | Total Consumer [Member]
Loans by FICO [Abstract]
Total PCI loans (carrying value)	5,005		12,749					$ 40,100
PCI Loans Carrying Value [Member] | Real estate 1-4 family first mortgage [Member]
Loans by FICO [Abstract]
Total PCI loans (carrying value)	4,988		12,722
PCI Loans Carrying Value [Member] | Real estate 1-4 family junior lien mortgage [Member]
Loans by FICO [Abstract]
Total PCI loans (carrying value)	17		27
PCI Loans Carrying Value [Member] | Credit Card [Member]
Loans by FICO [Abstract]
Total PCI loans (carrying value)	0		0
PCI Loans Carrying Value [Member] | Automobile Loan [Member]
Loans by FICO [Abstract]
Total PCI loans (carrying value)	0		0
PCI Loans Carrying Value [Member] | Other revolving credit and installment [Member]
Loans by FICO [Abstract]
Total PCI loans (carrying value)	0		0
FICO less than 600 [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Total Consumer [Member]
Loans by FICO [Abstract]
Loans	16,787		20,159
FICO less than 600 [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family first mortgage [Member]
Loans by FICO [Abstract]
Loans	4,273		5,145
FICO less than 600 [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family junior lien mortgage [Member]
Loans by FICO [Abstract]
Loans	1,454		1,768
FICO less than 600 [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Credit Card [Member]
Loans by FICO [Abstract]
Loans	3,292		3,525
FICO less than 600 [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Automobile Loan [Member]
Loans by FICO [Abstract]
Loans	7,071		8,858
FICO less than 600 [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Other revolving credit and installment [Member]
Loans by FICO [Abstract]
Loans	697		863
FICO 600-639 [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Total Consumer [Member]
Loans by FICO [Abstract]
Loans	11,901		14,360
FICO 600-639 [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family first mortgage [Member]
Loans by FICO [Abstract]
Loans	2,974		3,487
FICO 600-639 [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family junior lien mortgage [Member]
Loans by FICO [Abstract]
Loans	994		1,253
FICO 600-639 [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Credit Card [Member]
Loans by FICO [Abstract]
Loans	2,777		3,101
FICO 600-639 [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Automobile Loan [Member]
Loans by FICO [Abstract]
Loans	4,431		5,615
FICO 600-639 [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Other revolving credit and installment [Member]
Loans by FICO [Abstract]
Loans	725		904
FICO 640-679 [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Total Consumer [Member]
Loans by FICO [Abstract]
Loans	22,219		24,521
FICO 640-679 [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family first mortgage [Member]
Loans by FICO [Abstract]
Loans	5,810		6,789
FICO 640-679 [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family junior lien mortgage [Member]
Loans by FICO [Abstract]
Loans	1,898		2,387
FICO 640-679 [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Credit Card [Member]
Loans by FICO [Abstract]
Loans	6,464		5,690
FICO 640-679 [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Automobile Loan [Member]
Loans by FICO [Abstract]
Loans	6,225		7,696
FICO 640-679 [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Other revolving credit and installment [Member]
Loans by FICO [Abstract]
Loans	1,822		1,959
FICO 680-719 [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Total Consumer [Member]
Loans by FICO [Abstract]
Loans	37,659		39,809
FICO 680-719 [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family first mortgage [Member]
Loans by FICO [Abstract]
Loans	13,568		14,977
FICO 680-719 [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family junior lien mortgage [Member]
Loans by FICO [Abstract]
Loans	3,908		4,797
FICO 680-719 [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Credit Card [Member]
Loans by FICO [Abstract]
Loans	9,445		7,628
FICO 680-719 [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Automobile Loan [Member]
Loans by FICO [Abstract]
Loans	7,354		8,825
FICO 680-719 [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Other revolving credit and installment [Member]
Loans by FICO [Abstract]
Loans	3,384		3,582
FICO 720-759 [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Total Consumer [Member]
Loans by FICO [Abstract]
Loans	51,778		55,164
FICO 720-759 [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family first mortgage [Member]
Loans by FICO [Abstract]
Loans	27,258		27,926
FICO 720-759 [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family junior lien mortgage [Member]
Loans by FICO [Abstract]
Loans	5,323		6,246
FICO 720-759 [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Credit Card [Member]
Loans by FICO [Abstract]
Loans	7,949		8,097
FICO 720-759 [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Automobile Loan [Member]
Loans by FICO [Abstract]
Loans	6,853		7,806
FICO 720-759 [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Other revolving credit and installment [Member]
Loans by FICO [Abstract]
Loans	4,395		5,089
FICO 760-799 [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Total Consumer [Member]
Loans by FICO [Abstract]
Loans	80,004		82,010
FICO 760-799 [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family first mortgage [Member]
Loans by FICO [Abstract]
Loans	57,193		55,590
FICO 760-799 [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family junior lien mortgage [Member]
Loans by FICO [Abstract]
Loans	6,315		7,323
FICO 760-799 [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Credit Card [Member]
Loans by FICO [Abstract]
Loans	5,227		6,372
FICO 760-799 [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Automobile Loan [Member]
Loans by FICO [Abstract]
Loans	5,947		6,468
FICO 760-799 [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Other revolving credit and installment [Member]
Loans by FICO [Abstract]
Loans	5,322		6,257
FICO 800 or more [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Total Consumer [Member]
Loans by FICO [Abstract]
Loans	183,959		171,167
FICO 800 or more [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family first mortgage [Member]
Loans by FICO [Abstract]
Loans	151,465		136,729
FICO 800 or more [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family junior lien mortgage [Member]
Loans by FICO [Abstract]
Loans	13,190		15,144
FICO 800 or more [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Credit Card [Member]
Loans by FICO [Abstract]
Loans	3,794		2,994
FICO 800 or more [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Automobile Loan [Member]
Loans by FICO [Abstract]
Loans	7,099		7,845
FICO 800 or more [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Other revolving credit and installment [Member]
Loans by FICO [Abstract]
Loans	8,411		8,455
No FICO available [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Total Consumer [Member]
Loans by FICO [Abstract]
Loans	8,576		9,789
No FICO available [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family first mortgage [Member]
Loans by FICO [Abstract]
Loans	4,604		5,546
No FICO available [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family junior lien mortgage [Member]
Loans by FICO [Abstract]
Loans	1,299		768
No FICO available [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Credit Card [Member]
Loans by FICO [Abstract]
Loans	77		569
No FICO available [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Automobile Loan [Member]
Loans by FICO [Abstract]
Loans	89		258
No FICO available [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Other revolving credit and installment [Member]
Loans by FICO [Abstract]
Loans	2,507		2,648
FICO not required [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Total Consumer [Member]
Loans by FICO [Abstract]
Loans	8,885		8,511
FICO not required [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family first mortgage [Member]
Loans by FICO [Abstract]
Loans	0		0
FICO not required [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family junior lien mortgage [Member]
Loans by FICO [Abstract]
Loans	0		0
FICO not required [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Credit Card [Member]
Loans by FICO [Abstract]
Loans	0		0
FICO not required [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Automobile Loan [Member]
Loans by FICO [Abstract]
Loans	0		0
FICO not required [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Other revolving credit and installment [Member]
Loans by FICO [Abstract]
Loans	8,885		8,511
Loans Insured or Guaranteed by US Government Authorities [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Total Consumer [Member]
Loans by FICO [Abstract]
Loans	12,932		15,143
Loans Insured or Guaranteed by US Government Authorities [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family first mortgage [Member]
Loans by FICO [Abstract]
Loans	12,932		15,143
Loans Insured or Guaranteed by US Government Authorities [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Real estate 1-4 family junior lien mortgage [Member]
Loans by FICO [Abstract]
Loans	0		0
Loans Insured or Guaranteed by US Government Authorities [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Credit Card [Member]
Loans by FICO [Abstract]
Loans	0		0
Loans Insured or Guaranteed by US Government Authorities [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Automobile Loan [Member]
Loans by FICO [Abstract]
Loans	0		0
Loans Insured or Guaranteed by US Government Authorities [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member] | Other revolving credit and installment [Member]
Loans by FICO [Abstract]
Loans	$ 0		$ 0
[1]	(3)Parenthetical amounts represent assets and liabilities that 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	Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
High Value Properties, Threshold	$ 1
Loans by Loan to Value [Abstract]
Loans	953,110	[1]	$ 956,770	[1]	$ 967,604	$ 916,559	$ 862,551
Residential Mortgage [Member]
Loans by Loan to Value [Abstract]
Loans	319,463		323,767
Residential Mortgage [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member]
Loans by Loan to Value [Abstract]
Loans	314,458		311,018
Real estate 1-4 family first mortgage [Member]
Loans by Loan to Value [Abstract]
Loans	285,065		284,054		275,579	273,869	265,386
Real estate 1-4 family first mortgage [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member]
Loans by Loan to Value [Abstract]
Loans	280,077		271,332
Real estate 1-4 family junior lien mortgage [Member]
Loans by Loan to Value [Abstract]
Loans	34,398		39,713		$ 46,237	$ 53,004	$ 59,717
Real estate 1-4 family junior lien mortgage [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member]
Loans by Loan to Value [Abstract]
Loans	34,381		39,686
PCI Loans Carrying Value [Member]
Loans by Loan to Value [Abstract]
Total PCI loans (carrying value)	5,009		12,835
PCI Loans Carrying Value [Member] | Real estate 1-4 family first mortgage [Member]
Loans by Loan to Value [Abstract]
Total PCI loans (carrying value)	4,988		12,722
PCI Loans Carrying Value [Member] | Real estate 1-4 family junior lien mortgage [Member]
Loans by Loan to Value [Abstract]
Total PCI loans (carrying value)	17		27
PCI Loans Carrying Value [Member] | Residential Mortgage [Member]
Loans by Loan to Value [Abstract]
Total PCI loans (carrying value)	5,005		12,749
LTV 0-60% [Member] | Residential Mortgage [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member]
Loans by Loan to Value [Abstract]
Loans	163,419		150,203
LTV 0-60% [Member] | Real estate 1-4 family first mortgage [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member]
Loans by Loan to Value [Abstract]
Loans	147,666		133,902
LTV 0-60% [Member] | Real estate 1-4 family junior lien mortgage [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member]
Loans by Loan to Value [Abstract]
Loans	15,753		16,301
LTV 60.01-80% [Member] | Residential Mortgage [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member]
Loans by Loan to Value [Abstract]
Loans	115,660		117,557
LTV 60.01-80% [Member] | Real estate 1-4 family first mortgage [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member]
Loans by Loan to Value [Abstract]
Loans	104,477		104,639
LTV 60.01-80% [Member] | Real estate 1-4 family junior lien mortgage [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member]
Loans by Loan to Value [Abstract]
Loans	11,183		12,918
LTV 80.01-100% [Member] | Residential Mortgage [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member]
Loans by Loan to Value [Abstract]
Loans	17,246		20,504
LTV 80.01-100% [Member] | Real estate 1-4 family first mortgage [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member]
Loans by Loan to Value [Abstract]
Loans	12,372		13,924
LTV 80.01-100% [Member] | Real estate 1-4 family junior lien mortgage [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member]
Loans by Loan to Value [Abstract]
Loans	4,874		6,580
LTV 100.01-120% [Member] | Residential Mortgage [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member]
Loans by Loan to Value [Abstract]
Loans	2,807		4,295
LTV 100.01-120% [Member] | Real estate 1-4 family first mortgage [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member]
Loans by Loan to Value [Abstract]
Loans	1,211		1,868
LTV 100.01-120% [Member] | Real estate 1-4 family junior lien mortgage [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member]
Loans by Loan to Value [Abstract]
Loans	1,596		2,427
LTV greater than 120% [Member] | Residential Mortgage [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member]
Loans by Loan to Value [Abstract]
Loans	1,062		1,791
LTV greater than 120% [Member] | Real estate 1-4 family first mortgage [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member]
Loans by Loan to Value [Abstract]
Loans	484		783
LTV greater than 120% [Member] | Real estate 1-4 family junior lien mortgage [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member]
Loans by Loan to Value [Abstract]
Loans	578		1,008
No LTV/CLTV available [Member] | Residential Mortgage [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member]
Loans by Loan to Value [Abstract]
Loans	1,332		1,525
No LTV/CLTV available [Member] | Real estate 1-4 family first mortgage [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member]
Loans by Loan to Value [Abstract]
Loans	935		1,073
No LTV/CLTV available [Member] | Real estate 1-4 family junior lien mortgage [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member]
Loans by Loan to Value [Abstract]
Loans	397		452
Government Insured Or Guaranteed [Member] | Residential Mortgage [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member]
Loans by Loan to Value [Abstract]
Loans	12,932		15,143
Government Insured Or Guaranteed [Member] | Real estate 1-4 family first mortgage [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member]
Loans by Loan to Value [Abstract]
Loans	12,932		15,143
Government Insured Or Guaranteed [Member] | Real estate 1-4 family junior lien mortgage [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member]
Loans by Loan to Value [Abstract]
Loans	$ 0		$ 0
[1]	(3)Parenthetical amounts represent assets and liabilities that 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	Dec. 31, 2018	Dec. 31, 2017
Residential Real Estate [Member]
Nonaccrual Loans [Abstract]
Mortgage Loans in Process of Foreclosure, Amount	$ 4,600	$ 6,300
Government Guaranteed Mortgage Loans upon Foreclosure Receivable [Member]
Nonaccrual Loans [Abstract]
Mortgage Loans in Process of Foreclosure, Amount	3,200	4,000
Mortgage loans held for sale, loans held for sale and FVO [Member] | Real estate 1-4 family first mortgage [Member]
Nonaccrual Loans [Abstract]
Nonaccrual loans		390
Loans Excluding Certain Loans Acquired In Transfer With Evidence Of Credit Deterioration [Member]
Nonaccrual Loans [Abstract]
Nonaccrual loans	6,496	7,646
Loans Excluding Certain Loans Acquired In Transfer With Evidence Of Credit Deterioration [Member] | Total Commercial [Member]
Nonaccrual Loans [Abstract]
Nonaccrual loans	2,188	2,640
Loans Excluding Certain Loans Acquired In Transfer With Evidence Of Credit Deterioration [Member] | Commercial and Industrial Loans [Member]
Nonaccrual Loans [Abstract]
Nonaccrual loans	1,486	1,899
Loans Excluding Certain Loans Acquired In Transfer With Evidence Of Credit Deterioration [Member] | Commercial Real Estate Mortgage [Member]
Nonaccrual Loans [Abstract]
Nonaccrual loans	580	628
Loans Excluding Certain Loans Acquired In Transfer With Evidence Of Credit Deterioration [Member] | Commercial Real Estate Construction [Member]
Nonaccrual Loans [Abstract]
Nonaccrual loans	32	37
Loans Excluding Certain Loans Acquired In Transfer With Evidence Of Credit Deterioration [Member] | Lease Financing [Member]
Nonaccrual Loans [Abstract]
Nonaccrual loans	90	76
Loans Excluding Certain Loans Acquired In Transfer With Evidence Of Credit Deterioration [Member] | Total Consumer [Member]
Nonaccrual Loans [Abstract]
Nonaccrual loans	4,308	5,006
Loans Excluding Certain Loans Acquired In Transfer With Evidence Of Credit Deterioration [Member] | Real estate 1-4 family first mortgage [Member]
Nonaccrual Loans [Abstract]
Nonaccrual loans	3,183	3,732
Loans Excluding Certain Loans Acquired In Transfer With Evidence Of Credit Deterioration [Member] | Real estate 1-4 family junior lien mortgage [Member]
Nonaccrual Loans [Abstract]
Nonaccrual loans	945	1,086
Loans Excluding Certain Loans Acquired In Transfer With Evidence Of Credit Deterioration [Member] | Automobile [Member]
Nonaccrual Loans [Abstract]
Nonaccrual loans	130	130
Loans Excluding Certain Loans Acquired In Transfer With Evidence Of Credit Deterioration [Member] | Other revolving credit and installment [Member]
Nonaccrual Loans [Abstract]
Nonaccrual loans	$ 50	$ 58

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	Dec. 31, 2018	Dec. 31, 2017
Total Consumer [Member]
90 days or More Past Due and Still Accruing Loans [Abstract]
Loans, 90 days or more past due and still accruing	$ 885	$ 1,000
Financing Receivable Acquired With Deteriorated Credit Quality [Member]
90 days or More Past Due and Still Accruing Loans [Abstract]
Loans, 90 days or more past due and still accruing	370	1,400
Loans Excluding Certain Loans Acquired In Transfer With Evidence Of Credit Deterioration [Member]
90 days or More Past Due and Still Accruing Loans [Abstract]
Loans, 90 days or more past due and still accruing	8,704	11,532
Loans Excluding Certain Loans Acquired In Transfer With Evidence Of Credit Deterioration [Member] | FHA insured/VA guaranteed [Member]
90 days or More Past Due and Still Accruing Loans [Abstract]
Loans, 90 days or more past due and still accruing	7,725	10,475
Loans Excluding Certain Loans Acquired In Transfer With Evidence Of Credit Deterioration [Member] | Total Commercial [Member]
90 days or More Past Due and Still Accruing Loans [Abstract]
Loans, 90 days or more past due and still accruing	94	49
Loans Excluding Certain Loans Acquired In Transfer With Evidence Of Credit Deterioration [Member] | Total, not government insured/guaranteed [Member]
90 days or More Past Due and Still Accruing Loans [Abstract]
Loans, 90 days or more past due and still accruing	979	1,057
Loans Excluding Certain Loans Acquired In Transfer With Evidence Of Credit Deterioration [Member] | Total, not government insured/guaranteed [Member] | Total Commercial [Member]
90 days or More Past Due and Still Accruing Loans [Abstract]
Loans, 90 days or more past due and still accruing	94	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]
90 days or More Past Due and Still Accruing Loans [Abstract]
Loans, 90 days or more past due and still accruing	43	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]
90 days or More Past Due and Still Accruing Loans [Abstract]
Loans, 90 days or more past due and still accruing	51	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]
90 days or More Past Due and Still Accruing Loans [Abstract]
Loans, 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]
90 days or More Past Due and Still Accruing Loans [Abstract]
Loans, 90 days or more past due and still accruing	885	1,008
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]
90 days or More Past Due and Still Accruing Loans [Abstract]
Loans, 90 days or more past due and still accruing	124	213
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]
90 days or More Past Due and Still Accruing Loans [Abstract]
Loans, 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]
90 days or More Past Due and Still Accruing Loans [Abstract]
Loans, 90 days or more past due and still accruing	513	492
Loans Excluding Certain Loans Acquired In Transfer With Evidence Of Credit Deterioration [Member] | Total, not government insured/guaranteed [Member] | Automobile [Member]
90 days or More Past Due and Still Accruing Loans [Abstract]
Loans, 90 days or more past due and still accruing	114	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]
90 days or More Past Due and Still Accruing Loans [Abstract]
Loans, 90 days or more past due and still accruing	$ 102	100
Mortgage loans held for sale, Loans held for sale and loans held at fair value excluded [Member] [Member]
90 days or More Past Due and Still Accruing Loans [Abstract]
Loans, 90 days or more past due and still accruing		$ 6

Loans and Allowance for Cred_16

Loans and Allowance for Credit Losses, Impaired Loans (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Impaired Loans [Abstract]
Unpaid principal balance	$ 19,464	$ 22,110
Impaired loans	16,347	18,674
Impaired loans with related allowance for credit losses	9,078	11,639
Related allowance for credit losses	1,443	1,890
Loans and Leases Receivable, Impaired, Commitment to Lend	513	579
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	4,505	5,306
Impaired loans	3,221	3,960
Impaired loans with related allowance for credit losses	2,897	3,651
Related allowance for credit losses	514	705
Commercial and Industrial Loans [Member]
Impaired Loans [Abstract]
Unpaid principal balance	3,057	3,577
Impaired loans	2,030	2,568
Impaired loans with related allowance for credit losses	1,730	2,310
Related allowance for credit losses	319	462
Commercial Real Estate Mortgage [Member]
Impaired Loans [Abstract]
Unpaid principal balance	1,228	1,502
Impaired loans	1,032	1,239
Impaired loans with related allowance for credit losses	1,009	1,207
Related allowance for credit losses	154	211
Commercial Real Estate Construction [Member]
Impaired Loans [Abstract]
Unpaid principal balance	74	95
Impaired loans	47	54
Impaired loans with related allowance for credit losses	46	45
Related allowance for credit losses	9	9
Lease Financing [Member]
Impaired Loans [Abstract]
Unpaid principal balance	146	132
Impaired loans	112	99
Impaired loans with related allowance for credit losses	112	89
Related allowance for credit losses	32	23
Total Consumer [Member]
Impaired Loans [Abstract]
Unpaid principal balance	14,959	16,804
Impaired loans	13,126	14,714
Impaired loans with related allowance for credit losses	6,181	7,988
Related allowance for credit losses	929	1,185
Real estate 1-4 family first mortgage [Member]
Impaired Loans [Abstract]
Unpaid principal balance	12,309	14,020
Impaired loans	10,738	12,225
Impaired loans with related allowance for credit losses	4,420	6,060
Related allowance for credit losses	525	770
Real estate 1-4 family junior lien mortgage [Member]
Impaired Loans [Abstract]
Unpaid principal balance	1,886	2,135
Impaired loans	1,694	1,918
Impaired loans with related allowance for credit losses	1,133	1,421
Related allowance for credit losses	183	245
Credit Card [Member]
Impaired Loans [Abstract]
Unpaid principal balance	449	356
Impaired loans	449	356
Impaired loans with related allowance for credit losses	449	356
Related allowance for credit losses	172	136
Automobile [Member]
Impaired Loans [Abstract]
Unpaid principal balance	153	157
Impaired loans	89	87
Impaired loans with related allowance for credit losses	43	34
Related allowance for credit losses	8	5
Other revolving credit and installment [Member]
Impaired Loans [Abstract]
Unpaid principal balance	162	136
Impaired loans	156	128
Impaired loans with related allowance for credit losses	136	117
Related allowance for credit losses	41	29
Trial modifications [Member]
Impaired Loans [Abstract]
Impaired loans	$ 149	$ 194

Loans and Allowance for Cred_17

Loans and Allowance for Credit Losses, Impaired Loans, Average Recorded Investment and Interest Income (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average recorded investment	$ 17,626	$ 20,633	$ 23,875
Recognized interest income	1,121	1,130	1,251
Interest income:
Cash basis of accounting	338	299	353
Other	783	831	898
Total Commercial [Member]
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average recorded investment	3,665	4,740	5,247
Recognized interest income	270	224	240
Commercial and Industrial Loans [Member]
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average recorded investment	2,287	3,241	3,408
Recognized interest income	173	118	101
Commercial Real Estate Mortgage [Member]
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average recorded investment	1,193	1,328	1,636
Recognized interest income	89	91	128
Commercial Real Estate Construction [Member]
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average recorded investment	60	66	115
Recognized interest income	7	14	11
Lease Financing [Member]
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average recorded investment	125	105	88
Recognized interest income	1	1	0
Total Consumer [Member]
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average recorded investment	13,961	15,893	18,628
Recognized interest income	851	906	1,011
Real estate 1-4 family first mortgage [Member]
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average recorded investment	11,522	13,326	15,857
Recognized interest income	664	730	828
Real estate 1-4 family junior lien mortgage [Member]
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average recorded investment	1,804	2,041	2,294
Recognized interest income	116	121	132
Credit Card [Member]
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average recorded investment	407	323	295
Recognized interest income	50	36	34
Automobile [Member]
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average recorded investment	86	86	93
Recognized interest income	11	11	11
Other revolving credit and installment [Member]
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Average recorded investment	142	117	89
Recognized interest income	$ 10	$ 8	$ 6

Loans and Allowance for Cred_18

Loans and Allowance for Credit Losses, Troubled Debt Restructurings Modifications by Type (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Primary Modification Type [Abstract]
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 4,786	$ 5,578	$ 6,718
Financial effects of modifications [Abstract]
Charge-offs	$ 97	$ 262	$ 485
Weighted average interest rate reduction	8.06%	5.92%	4.13%
Loans and Leases Receivable, Net Amount	$ 943,335	$ 945,766
Modification to principal [Member]
Primary Modification Type [Abstract]
Financing Receivable, Modifications, Post-Modification Recorded Investment	242	287	$ 408
troubled debt restructuring balance [Member]
Financial effects of modifications [Abstract]
Loans and Leases Receivable, Net Amount	15,500	17,800
Contractual Interest Rate Reduction [Member]
Primary Modification Type [Abstract]
Financing Receivable, Modifications, Post-Modification Recorded Investment	541	646	888
Modifications, other concessions [Member]
Primary Modification Type [Abstract]
Financing Receivable, Modifications, Post-Modification Recorded Investment	4,003	4,645	5,422
Modification of recorded investment related to interest rate reduction [Member]
Primary Modification Type [Abstract]
Financing Receivable, Modifications, Post-Modification Recorded Investment	638	774	1,128
Loans remodified [Member]
Primary Modification Type [Abstract]
Financing Receivable, Modifications, Post-Modification Recorded Investment	1,900	2,100	1,600
Principal Forgiveness [Member]
Primary Modification Type [Abstract]
Financing Receivable, Modifications, Post-Modification Recorded Investment	28	32	67
Commercial Portfolio Segment [Member]
Primary Modification Type [Abstract]
Financing Receivable, Modifications, Post-Modification Recorded Investment	2,859	3,616	4,100
Financial effects of modifications [Abstract]
Charge-offs	$ 58	$ 193	$ 361
Weighted average interest rate reduction	1.00%	1.00%	1.51%
Commercial Portfolio Segment [Member] | Modification to principal [Member]
Primary Modification Type [Abstract]
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 13	$ 29	$ 44
Commercial Portfolio Segment [Member] | Contractual Interest Rate Reduction [Member]
Primary Modification Type [Abstract]
Financing Receivable, Modifications, Post-Modification Recorded Investment	73	105	262
Commercial Portfolio Segment [Member] | Modifications, other concessions [Member]
Primary Modification Type [Abstract]
Financing Receivable, Modifications, Post-Modification Recorded Investment	2,773	3,482	3,794
Commercial Portfolio Segment [Member] | Modification of recorded investment related to interest rate reduction [Member]
Primary Modification Type [Abstract]
Financing Receivable, Modifications, Post-Modification Recorded Investment	73	105	262
Commercial and Industrial Loans [Member]
Primary Modification Type [Abstract]
Financing Receivable, Modifications, Post-Modification Recorded Investment	2,352	2,981	3,326
Financial effects of modifications [Abstract]
Charge-offs	$ 58	$ 173	$ 360
Weighted average interest rate reduction	1.18%	0.64%	1.91%
Commercial and Industrial Loans [Member] | Modification to principal [Member]
Primary Modification Type [Abstract]
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 13	$ 24	$ 42
Commercial and Industrial Loans [Member] | Contractual Interest Rate Reduction [Member]
Primary Modification Type [Abstract]
Financing Receivable, Modifications, Post-Modification Recorded Investment	29	45	130
Commercial and Industrial Loans [Member] | Modifications, other concessions [Member]
Primary Modification Type [Abstract]
Financing Receivable, Modifications, Post-Modification Recorded Investment	2,310	2,912	3,154
Commercial and Industrial Loans [Member] | Modification of recorded investment related to interest rate reduction [Member]
Primary Modification Type [Abstract]
Financing Receivable, Modifications, Post-Modification Recorded Investment	29	45	130
Commercial Real Estate Mortgage [Member]
Primary Modification Type [Abstract]
Financing Receivable, Modifications, Post-Modification Recorded Investment	419	571	667
Financial effects of modifications [Abstract]
Charge-offs	$ 0	$ 20	$ 1
Weighted average interest rate reduction	0.88%	1.28%	1.15%
Commercial Real Estate Mortgage [Member] | Modification to principal [Member]
Primary Modification Type [Abstract]
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0	$ 5	$ 2
Commercial Real Estate Mortgage [Member] | Contractual Interest Rate Reduction [Member]
Primary Modification Type [Abstract]
Financing Receivable, Modifications, Post-Modification Recorded Investment	44	59	105
Commercial Real Estate Mortgage [Member] | Modifications, other concessions [Member]
Primary Modification Type [Abstract]
Financing Receivable, Modifications, Post-Modification Recorded Investment	375	507	560
Commercial Real Estate Mortgage [Member] | Modification of recorded investment related to interest rate reduction [Member]
Primary Modification Type [Abstract]
Financing Receivable, Modifications, Post-Modification Recorded Investment	44	59	105
Commercial Real Estate Construction [Member]
Primary Modification Type [Abstract]
Financing Receivable, Modifications, Post-Modification Recorded Investment	25	27	99
Financial effects of modifications [Abstract]
Charge-offs	$ 0	$ 0	$ 0
Weighted average interest rate reduction	0.00%	0.69%	1.02%
Commercial Real Estate Construction [Member] | Modification to principal [Member]
Primary Modification Type [Abstract]
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0	$ 0	$ 0
Commercial Real Estate Construction [Member] | Contractual Interest Rate Reduction [Member]
Primary Modification Type [Abstract]
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	1	27
Commercial Real Estate Construction [Member] | Modifications, other concessions [Member]
Primary Modification Type [Abstract]
Financing Receivable, Modifications, Post-Modification Recorded Investment	25	26	72
Commercial Real Estate Construction [Member] | Modification of recorded investment related to interest rate reduction [Member]
Primary Modification Type [Abstract]
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	1	27
Lease Financing [Member]
Primary Modification Type [Abstract]
Financing Receivable, Modifications, Post-Modification Recorded Investment	63	37	8
Financial effects of modifications [Abstract]
Charge-offs	$ 0	$ 0	$ 0
Weighted average interest rate reduction	0.00%	0.00%	0.00%
Lease Financing [Member] | Modification to principal [Member]
Primary Modification Type [Abstract]
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0	$ 0	$ 0
Lease Financing [Member] | Contractual Interest Rate Reduction [Member]
Primary Modification Type [Abstract]
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	0	0
Lease Financing [Member] | Modifications, other concessions [Member]
Primary Modification Type [Abstract]
Financing Receivable, Modifications, Post-Modification Recorded Investment	63	37	8
Lease Financing [Member] | Modification of recorded investment related to interest rate reduction [Member]
Primary Modification Type [Abstract]
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	0	0
Consumer Portfolio Segment [Member]
Primary Modification Type [Abstract]
Financing Receivable, Modifications, Post-Modification Recorded Investment	1,927	1,962	2,618
Financial effects of modifications [Abstract]
Charge-offs	$ 39	$ 69	$ 124
Weighted average interest rate reduction	8.96%	6.70%	4.92%
Consumer Portfolio Segment [Member] | Modification to principal [Member]
Primary Modification Type [Abstract]
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 229	$ 258	$ 364
Consumer Portfolio Segment [Member] | Contractual Interest Rate Reduction [Member]
Primary Modification Type [Abstract]
Financing Receivable, Modifications, Post-Modification Recorded Investment	468	541	626
Consumer Portfolio Segment [Member] | Modifications, other concessions [Member]
Primary Modification Type [Abstract]
Financing Receivable, Modifications, Post-Modification Recorded Investment	1,230	1,163	1,628
Consumer Portfolio Segment [Member] | Modification of recorded investment related to interest rate reduction [Member]
Primary Modification Type [Abstract]
Financing Receivable, Modifications, Post-Modification Recorded Investment	565	669	866
Real estate 1-4 family first mortgage [Member]
Primary Modification Type [Abstract]
Financing Receivable, Modifications, Post-Modification Recorded Investment	1,277	1,406	2,037
Financial effects of modifications [Abstract]
Charge-offs	$ 4	$ 15	$ 49
Weighted average interest rate reduction	2.25%	2.57%	2.69%
Real estate 1-4 family first mortgage [Member] | Modification to principal [Member]
Primary Modification Type [Abstract]
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 209	$ 231	$ 338
Real estate 1-4 family first mortgage [Member] | Contractual Interest Rate Reduction [Member]
Primary Modification Type [Abstract]
Financing Receivable, Modifications, Post-Modification Recorded Investment	26	140	288
Real estate 1-4 family first mortgage [Member] | Modifications, other concessions [Member]
Primary Modification Type [Abstract]
Financing Receivable, Modifications, Post-Modification Recorded Investment	1,042	1,035	1,411
Real estate 1-4 family first mortgage [Member] | Modification of recorded investment related to interest rate reduction [Member]
Primary Modification Type [Abstract]
Financing Receivable, Modifications, Post-Modification Recorded Investment	119	257	507
Real estate 1-4 family junior lien mortgage [Member]
Primary Modification Type [Abstract]
Financing Receivable, Modifications, Post-Modification Recorded Investment	161	188	238
Financial effects of modifications [Abstract]
Charge-offs	$ 5	$ 14	$ 37
Weighted average interest rate reduction	2.14%	3.26%	3.07%
Real estate 1-4 family junior lien mortgage [Member] | Modification to principal [Member]
Primary Modification Type [Abstract]
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 7	$ 25	$ 23
Real estate 1-4 family junior lien mortgage [Member] | Contractual Interest Rate Reduction [Member]
Primary Modification Type [Abstract]
Financing Receivable, Modifications, Post-Modification Recorded Investment	41	82	109
Real estate 1-4 family junior lien mortgage [Member] | Modifications, other concessions [Member]
Primary Modification Type [Abstract]
Financing Receivable, Modifications, Post-Modification Recorded Investment	113	81	106
Real estate 1-4 family junior lien mortgage [Member] | Modification of recorded investment related to interest rate reduction [Member]
Primary Modification Type [Abstract]
Financing Receivable, Modifications, Post-Modification Recorded Investment	45	93	130
Credit Card [Member]
Primary Modification Type [Abstract]
Financing Receivable, Modifications, Post-Modification Recorded Investment	336	257	180
Financial effects of modifications [Abstract]
Charge-offs	$ 0	$ 0	$ 0
Weighted average interest rate reduction	12.54%	11.98%	12.09%
Credit Card [Member] | Modification to principal [Member]
Primary Modification Type [Abstract]
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0	$ 0	$ 0
Credit Card [Member] | Contractual Interest Rate Reduction [Member]
Primary Modification Type [Abstract]
Financing Receivable, Modifications, Post-Modification Recorded Investment	336	257	180
Credit Card [Member] | Modifications, other concessions [Member]
Primary Modification Type [Abstract]
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	0	0
Credit Card [Member] | Modification of recorded investment related to interest rate reduction [Member]
Primary Modification Type [Abstract]
Financing Receivable, Modifications, Post-Modification Recorded Investment	336	257	180
Automobile [Member]
Primary Modification Type [Abstract]
Financing Receivable, Modifications, Post-Modification Recorded Investment	84	84	75
Financial effects of modifications [Abstract]
Charge-offs	$ 30	$ 39	$ 36
Weighted average interest rate reduction	6.21%	5.89%	6.07%
Automobile [Member] | Modification to principal [Member]
Primary Modification Type [Abstract]
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 13	$ 2	$ 2
Automobile [Member] | Contractual Interest Rate Reduction [Member]
Primary Modification Type [Abstract]
Financing Receivable, Modifications, Post-Modification Recorded Investment	16	15	16
Automobile [Member] | Modifications, other concessions [Member]
Primary Modification Type [Abstract]
Financing Receivable, Modifications, Post-Modification Recorded Investment	55	67	57
Automobile [Member] | Modification of recorded investment related to interest rate reduction [Member]
Primary Modification Type [Abstract]
Financing Receivable, Modifications, Post-Modification Recorded Investment	16	15	16
Other revolving credit and installment [Member]
Primary Modification Type [Abstract]
Financing Receivable, Modifications, Post-Modification Recorded Investment	61	55	44
Financial effects of modifications [Abstract]
Charge-offs	$ 0	$ 1	$ 2
Weighted average interest rate reduction	7.95%	7.47%	6.83%
Other revolving credit and installment [Member] | Modification to principal [Member]
Primary Modification Type [Abstract]
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0	$ 0	$ 1
Other revolving credit and installment [Member] | Contractual Interest Rate Reduction [Member]
Primary Modification Type [Abstract]
Financing Receivable, Modifications, Post-Modification Recorded Investment	49	47	33
Other revolving credit and installment [Member] | Modifications, other concessions [Member]
Primary Modification Type [Abstract]
Financing Receivable, Modifications, Post-Modification Recorded Investment	12	8	10
Other revolving credit and installment [Member] | Modification of recorded investment related to interest rate reduction [Member]
Primary Modification Type [Abstract]
Financing Receivable, Modifications, Post-Modification Recorded Investment	49	47	33
Trial modifications [Member]
Primary Modification Type [Abstract]
Financing Receivable, Modifications, Post-Modification Recorded Investment	8	(28)	44
Financial effects of modifications [Abstract]
Charge-offs	$ 0	$ 0	$ 0
Weighted average interest rate reduction	0.00%	0.00%	0.00%
Trial modifications [Member] | Modification to principal [Member]
Primary Modification Type [Abstract]
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0	$ 0	$ 0
Trial modifications [Member] | Contractual Interest Rate Reduction [Member]
Primary Modification Type [Abstract]
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	0	0
Trial modifications [Member] | Modifications, other concessions [Member]
Primary Modification Type [Abstract]
Financing Receivable, Modifications, Post-Modification Recorded Investment	8	(28)	44
Trial modifications [Member] | Modification of recorded investment related to interest rate reduction [Member]
Primary Modification Type [Abstract]
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0	$ 0	$ 0

Loans and Allowance for Cred_19

Loans and Allowance for Credit Losses, Troubled Debt Restructurings, Current Defaults (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Financing Receivable, Modifications [Line Items]
Recorded investment of defaults	$ 483	$ 466	$ 424
Commercial Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment of defaults	310	239	193
Commercial and Industrial Loans [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment of defaults	198	173	124
Commercial Real Estate Mortgage [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment of defaults	76	61	66
Commercial Real Estate Construction [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment of defaults	36	4	3
Commercial Lease Financing Receivable [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment of defaults	0	1	0
Consumer Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment of defaults	173	227	231
Real estate 1-4 family first mortgage [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment of defaults	60	114	138
Real estate 1-4 family junior lien mortgage [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment of defaults	14	19	20
Credit Card [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment of defaults	79	74	56
Automobile [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment of defaults	14	15	13
Other revolving credit and installment [Member]
Financing Receivable, Modifications [Line Items]
Recorded investment of defaults	$ 6	$ 5	$ 4

Loans and Allowance for Cred_20

Loans and Allowance for Credit Losses, PCI Loans Outstanding (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2008
PCI Loans Carrying Value [Member]
PCI loans [Abstract]
Total PCI loans (carrying value)	$ 5,009	$ 12,835
PCI Loans Carrying Value [Member] | Total Commercial [Member]
PCI loans [Abstract]
Total PCI loans (carrying value)	4	86	$ 18,700
PCI Loans Carrying Value [Member] | Commercial and Industrial Loans [Member]
PCI loans [Abstract]
Total PCI loans (carrying value)	4	86
PCI Loans Carrying Value [Member] | Commercial Real Estate Mortgage [Member]
PCI loans [Abstract]
Total PCI loans (carrying value)	0	0
PCI Loans Carrying Value [Member] | Commercial Real Estate Construction [Member]
PCI loans [Abstract]
Total PCI loans (carrying value)	0	0
PCI Loans Carrying Value [Member] | Total Consumer [Member]
PCI loans [Abstract]
Total PCI loans (carrying value)	5,005	12,749	40,100
PCI Loans Carrying Value [Member] | Real estate 1-4 family first mortgage [Member]
PCI loans [Abstract]
Total PCI loans (carrying value)	4,988	12,722
PCI Loans Carrying Value [Member] | Real estate 1-4 family junior lien mortgage [Member]
PCI loans [Abstract]
Total PCI loans (carrying value)	17	27
PCI Loans UPB [Member]
PCI loans [Abstract]
Total PCI loans (unpaid principal balance)	7,348	18,975	$ 98,200
PCI Loans UPB [Member] | Real estate 1-4 family first mortgage [Member]
PCI loans [Abstract]
Total PCI loans (carrying value)	6,775	16,888
PCI Loans UPB [Member] | Real estate 1-4 family junior lien mortgage [Member]
PCI loans [Abstract]
Total PCI loans (carrying value)	$ 134	$ 157

Loans and Allowance for Cred_21

Loans and Allowance for Credit Losses, PCI, Accretable Yield (Details) - USD ($) $ in Millions	12 Months Ended			84 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Significant Sales	$ 2,166	$ 2,491
Change in accretable yield related to PCI loans [Abstract]
Total, beginning of period	8,887	11,216	$ 16,301	$ 10,447
Addition of accretable yield due to acquisitions	0	2	27	132
Accretion into interest income	(1,094)	(1,406)	(1,365)	(14,212)
Accretion into noninterest income due to sales	(2,374)	(334)	(9)	(458)
Reclassification from nonaccretable difference for loans with improving credit-related cash flows	403	642	1,221	9,734
Changes in expected cash flows that do not affect nonaccretable difference	(2,789)	(1,233)	(4,959)	10,658
Total, end of period	3,033	$ 8,887	$ 11,216	$ 16,301
PCI Loans Carrying Value [Member] | Pick-A-Pay Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Gain (Loss) on Sales, Net	2,400
Financing Receivable, Significant Sales	$ 6,200

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	Dec. 31, 2018	Dec. 31, 2017
Purchased Credit Impaired Loans by Credit Quality Indicator [Abstract]
Total PCI loans (carrying value)	$ 4	$ 86
Pass [Member]
Purchased Credit Impaired Loans by Credit Quality Indicator [Abstract]
Total PCI loans (carrying value)	1	8
Criticized [Member]
Purchased Credit Impaired Loans by Credit Quality Indicator [Abstract]
Total PCI loans (carrying value)	$ 3	$ 78

Loans and Allowance for Cred_23

Loans and Allowance for Credit Losses, PCI, by Delinquency Status, Commercial (Details) - Total Commercial [Member] - Financial Asset Acquired with Credit Deterioration [Member] - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Purchased Credit Impaired Loans Commercial Days Past Due [Abstract]
Total PCI loans (carrying value)	$ 4	$ 86
Financing Receivables, 1 to 29 Days Past Due [Member]
Purchased Credit Impaired Loans Commercial Days Past Due [Abstract]
Total PCI loans (carrying value)	3	86
30-89 days past due and still accruing [Member]
Purchased Credit Impaired Loans Commercial Days Past Due [Abstract]
Total PCI loans (carrying value)	$ 1	$ 0

Loans and Allowance for Cred_24

Loans and Allowance for Credit Losses, PCI, by Delinquency Status, Consumer (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
PCI Loans Carrying Value [Member]
Purchased Credit Impaired Loans by Consumer Days Past Due [Abstract]
Total PCI loans (carrying value)	$ 5,009	$ 12,835
Real estate 1-4 family first mortgage [Member] | PCI Loans Carrying Value [Member]
Purchased Credit Impaired Loans by Consumer Days Past Due [Abstract]
Total PCI loans (carrying value)	4,988	12,722
Real estate 1-4 family first mortgage [Member] | PCI Loans UPB [Member]
Purchased Credit Impaired Loans by Consumer Days Past Due [Abstract]
Total PCI loans (carrying value)	6,775	16,888
Real estate 1-4 family junior lien mortgage [Member] | PCI Loans Carrying Value [Member]
Purchased Credit Impaired Loans by Consumer Days Past Due [Abstract]
Total PCI loans (carrying value)	17	27
Real estate 1-4 family junior lien mortgage [Member] | PCI Loans UPB [Member]
Purchased Credit Impaired Loans by Consumer Days Past Due [Abstract]
Total PCI loans (carrying value)	134	157
Residential Mortgage [Member] | PCI Loans Carrying Value [Member]
Purchased Credit Impaired Loans by Consumer Days Past Due [Abstract]
Total PCI loans (carrying value)	5,005	12,749
Residential Mortgage [Member] | PCI Loans UPB [Member]
Purchased Credit Impaired Loans by Consumer Days Past Due [Abstract]
Total PCI loans (carrying value)	6,909	17,045
Financing Receivables, 1 to 29 Days Past Due [Member] | Real estate 1-4 family first mortgage [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Purchased Credit Impaired Loans by Consumer Days Past Due [Abstract]
Total PCI loans (carrying value)	5,545	13,127
Financing Receivables, 1 to 29 Days Past Due [Member] | Real estate 1-4 family junior lien mortgage [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Purchased Credit Impaired Loans by Consumer Days Past Due [Abstract]
Total PCI loans (carrying value)	117	138
Financing Receivables, 1 to 29 Days Past Due [Member] | Residential Mortgage [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Purchased Credit Impaired Loans by Consumer Days Past Due [Abstract]
Total PCI loans (carrying value)	5,662	13,265
Financing Receivables, 30 to 59 Days Past Due [Member] | Real estate 1-4 family first mortgage [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Purchased Credit Impaired Loans by Consumer Days Past Due [Abstract]
Total PCI loans (carrying value)	495	1,317
Financing Receivables, 30 to 59 Days Past Due [Member] | Real estate 1-4 family junior lien mortgage [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Purchased Credit Impaired Loans by Consumer Days Past Due [Abstract]
Total PCI loans (carrying value)	8	8
Financing Receivables, 30 to 59 Days Past Due [Member] | Residential Mortgage [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Purchased Credit Impaired Loans by Consumer Days Past Due [Abstract]
Total PCI loans (carrying value)	503	1,325
Financing Receivables, 60 to 89 Days Past Due [Member] | Real estate 1-4 family first mortgage [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Purchased Credit Impaired Loans by Consumer Days Past Due [Abstract]
Total PCI loans (carrying value)	229	622
Financing Receivables, 60 to 89 Days Past Due [Member] | Real estate 1-4 family junior lien mortgage [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Purchased Credit Impaired Loans by Consumer Days Past Due [Abstract]
Total PCI loans (carrying value)	3	3
Financing Receivables, 60 to 89 Days Past Due [Member] | Residential Mortgage [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Purchased Credit Impaired Loans by Consumer Days Past Due [Abstract]
Total PCI loans (carrying value)	232	625
90-119 Days Past Due [Member] | Real estate 1-4 family first mortgage [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Purchased Credit Impaired Loans by Consumer Days Past Due [Abstract]
Total PCI loans (carrying value)	99	293
90-119 Days Past Due [Member] | Real estate 1-4 family junior lien mortgage [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Purchased Credit Impaired Loans by Consumer Days Past Due [Abstract]
Total PCI loans (carrying value)	2	2
90-119 Days Past Due [Member] | Residential Mortgage [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Purchased Credit Impaired Loans by Consumer Days Past Due [Abstract]
Total PCI loans (carrying value)	101	295
120-179 DPD member [Member] | Real estate 1-4 family first mortgage [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Purchased Credit Impaired Loans by Consumer Days Past Due [Abstract]
Total PCI loans (carrying value)	54	219
120-179 DPD member [Member] | Real estate 1-4 family junior lien mortgage [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Purchased Credit Impaired Loans by Consumer Days Past Due [Abstract]
Total PCI loans (carrying value)	1	2
120-179 DPD member [Member] | Residential Mortgage [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Purchased Credit Impaired Loans by Consumer Days Past Due [Abstract]
Total PCI loans (carrying value)	55	221
180 plus DPD [Member] | Real estate 1-4 family first mortgage [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Purchased Credit Impaired Loans by Consumer Days Past Due [Abstract]
Total PCI loans (carrying value)	353	1,310
180 plus DPD [Member] | Real estate 1-4 family junior lien mortgage [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Purchased Credit Impaired Loans by Consumer Days Past Due [Abstract]
Total PCI loans (carrying value)	3	4
180 plus DPD [Member] | Residential Mortgage [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Purchased Credit Impaired Loans by Consumer Days Past Due [Abstract]
Total PCI loans (carrying value)	$ 356	$ 1,314

Loans and Allowance for Cred_25

Loans and Allowance for Credit Losses, PCI, by FICO Score, Consumer (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
PCI Loans Carrying Value [Member]
Purchased Credit Impaired Loans by FICO [Abstract]
Total PCI loans (carrying value)	$ 5,009	$ 12,835
PCI Loans Carrying Value [Member] | Real estate 1-4 family first mortgage [Member]
Purchased Credit Impaired Loans by FICO [Abstract]
Total PCI loans (carrying value)	4,988	12,722
PCI Loans Carrying Value [Member] | Real estate 1-4 family junior lien mortgage [Member]
Purchased Credit Impaired Loans by FICO [Abstract]
Total PCI loans (carrying value)	17	27
PCI Loans Carrying Value [Member] | Residential Mortgage [Member]
Purchased Credit Impaired Loans by FICO [Abstract]
Total PCI loans (carrying value)	5,005	12,749
PCI Loans UPB [Member] | Real estate 1-4 family first mortgage [Member]
Purchased Credit Impaired Loans by FICO [Abstract]
Total PCI loans (carrying value)	6,775	16,888
PCI Loans UPB [Member] | Real estate 1-4 family junior lien mortgage [Member]
Purchased Credit Impaired Loans by FICO [Abstract]
Total PCI loans (carrying value)	134	157
PCI Loans UPB [Member] | Residential Mortgage [Member]
Purchased Credit Impaired Loans by FICO [Abstract]
Total PCI loans (carrying value)	6,909	17,045
FICO less than 600 [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Real estate 1-4 family first mortgage [Member]
Purchased Credit Impaired Loans by FICO [Abstract]
Total PCI loans (carrying value)	1,418	4,014
FICO less than 600 [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Real estate 1-4 family junior lien mortgage [Member]
Purchased Credit Impaired Loans by FICO [Abstract]
Total PCI loans (carrying value)	27	37
FICO less than 600 [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Residential Mortgage [Member]
Purchased Credit Impaired Loans by FICO [Abstract]
Total PCI loans (carrying value)	1,445	4,051
FICO 600-639 [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Real estate 1-4 family first mortgage [Member]
Purchased Credit Impaired Loans by FICO [Abstract]
Total PCI loans (carrying value)	713	2,086
FICO 600-639 [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Real estate 1-4 family junior lien mortgage [Member]
Purchased Credit Impaired Loans by FICO [Abstract]
Total PCI loans (carrying value)	18	20
FICO 600-639 [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Residential Mortgage [Member]
Purchased Credit Impaired Loans by FICO [Abstract]
Total PCI loans (carrying value)	731	2,106
FICO 640-679 [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Real estate 1-4 family first mortgage [Member]
Purchased Credit Impaired Loans by FICO [Abstract]
Total PCI loans (carrying value)	898	2,393
FICO 640-679 [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Real estate 1-4 family junior lien mortgage [Member]
Purchased Credit Impaired Loans by FICO [Abstract]
Total PCI loans (carrying value)	20	24
FICO 640-679 [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Residential Mortgage [Member]
Purchased Credit Impaired Loans by FICO [Abstract]
Total PCI loans (carrying value)	918	2,417
FICO 680-719 [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Real estate 1-4 family first mortgage [Member]
Purchased Credit Impaired Loans by FICO [Abstract]
Total PCI loans (carrying value)	970	2,242
FICO 680-719 [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Real estate 1-4 family junior lien mortgage [Member]
Purchased Credit Impaired Loans by FICO [Abstract]
Total PCI loans (carrying value)	24	29
FICO 680-719 [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Residential Mortgage [Member]
Purchased Credit Impaired Loans by FICO [Abstract]
Total PCI loans (carrying value)	994	2,271
FICO 720-759 [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Real estate 1-4 family first mortgage [Member]
Purchased Credit Impaired Loans by FICO [Abstract]
Total PCI loans (carrying value)	843	1,779
FICO 720-759 [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Real estate 1-4 family junior lien mortgage [Member]
Purchased Credit Impaired Loans by FICO [Abstract]
Total PCI loans (carrying value)	20	23
FICO 720-759 [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Residential Mortgage [Member]
Purchased Credit Impaired Loans by FICO [Abstract]
Total PCI loans (carrying value)	863	1,802
FICO 760-799 [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Real estate 1-4 family first mortgage [Member]
Purchased Credit Impaired Loans by FICO [Abstract]
Total PCI loans (carrying value)	523	933
FICO 760-799 [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Real estate 1-4 family junior lien mortgage [Member]
Purchased Credit Impaired Loans by FICO [Abstract]
Total PCI loans (carrying value)	11	12
FICO 760-799 [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Residential Mortgage [Member]
Purchased Credit Impaired Loans by FICO [Abstract]
Total PCI loans (carrying value)	534	945
FICO 800 or more [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Real estate 1-4 family first mortgage [Member]
Purchased Credit Impaired Loans by FICO [Abstract]
Total PCI loans (carrying value)	381	468
FICO 800 or more [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Real estate 1-4 family junior lien mortgage [Member]
Purchased Credit Impaired Loans by FICO [Abstract]
Total PCI loans (carrying value)	6	6
FICO 800 or more [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Residential Mortgage [Member]
Purchased Credit Impaired Loans by FICO [Abstract]
Total PCI loans (carrying value)	387	474
No FICO available [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Real estate 1-4 family first mortgage [Member]
Purchased Credit Impaired Loans by FICO [Abstract]
Total PCI loans (carrying value)	1,029	2,973
No FICO available [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Real estate 1-4 family junior lien mortgage [Member]
Purchased Credit Impaired Loans by FICO [Abstract]
Total PCI loans (carrying value)	8	6
No FICO available [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Residential Mortgage [Member]
Purchased Credit Impaired Loans by FICO [Abstract]
Total PCI loans (carrying value)	$ 1,037	$ 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	Dec. 31, 2018	Dec. 31, 2017
PCI Loans UPB [Member] | Real estate 1-4 family first mortgage [Member]
By LTV/CLTV:
Total PCI loans (carrying value)	$ 6,775	$ 16,888
PCI Loans UPB [Member] | Real estate 1-4 family junior lien mortgage [Member]
By LTV/CLTV:
Total PCI loans (carrying value)	134	157
PCI Loans UPB [Member] | Residential Mortgage [Member]
By LTV/CLTV:
Total PCI loans (carrying value)	6,909	17,045
PCI Loans Carrying Value [Member]
By LTV/CLTV:
Total PCI loans (carrying value)	5,009	12,835
PCI Loans Carrying Value [Member] | Real estate 1-4 family first mortgage [Member]
By LTV/CLTV:
Total PCI loans (carrying value)	4,988	12,722
PCI Loans Carrying Value [Member] | Real estate 1-4 family junior lien mortgage [Member]
By LTV/CLTV:
Total PCI loans (carrying value)	17	27
PCI Loans Carrying Value [Member] | Residential Mortgage [Member]
By LTV/CLTV:
Total PCI loans (carrying value)	5,005	12,749
LTV 0-60% [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Real estate 1-4 family first mortgage [Member]
By LTV/CLTV:
Total PCI loans (carrying value)	3,970	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:
Total PCI loans (carrying value)	44	45
LTV 0-60% [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Residential Mortgage [Member]
By LTV/CLTV:
Total PCI loans (carrying value)	4,014	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:
Total PCI loans (carrying value)	2,161	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:
Total PCI loans (carrying value)	53	63
LTV 60.01-80% [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Residential Mortgage [Member]
By LTV/CLTV:
Total PCI loans (carrying value)	2,214	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:
Total PCI loans (carrying value)	542	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:
Total PCI loans (carrying value)	28	35
LTV 80.01-100% [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Residential Mortgage [Member]
By LTV/CLTV:
Total PCI loans (carrying value)	570	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:
Total PCI loans (carrying value)	82	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:
Total PCI loans (carrying value)	8	10
LTV 100.01-120% [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Residential Mortgage [Member]
By LTV/CLTV:
Total PCI loans (carrying value)	90	329
LTV greater than 120% [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Real estate 1-4 family first mortgage [Member]
By LTV/CLTV:
Total PCI loans (carrying value)	19	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:
Total PCI loans (carrying value)	1	3
LTV greater than 120% [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Residential Mortgage [Member]
By LTV/CLTV:
Total PCI loans (carrying value)	20	76
No LTV/CLTV available [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Real estate 1-4 family first mortgage [Member]
By LTV/CLTV:
Total PCI loans (carrying value)	1	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:
Total PCI loans (carrying value)	0	1
No LTV/CLTV available [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Residential Mortgage [Member]
By LTV/CLTV:
Total PCI loans (carrying value)	$ 1	$ 2

Premises, Equipment, and Lease

Premises, Equipment, and Lease Commitments (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Total premises and equipment	$ 20,089	$ 20,147
Less: Accumulated depreciation and amortization	11,169	11,300
Net book value, premises and equipment	8,920	8,847
Property, Plant And Equipment (Textuals) [Abstract]
Depreciation and amortization expense for premises and equipment	1,300	1,200	$ 1,200
Net gains on disposition of premises and equipment	$ 32	128	44
Operating leases for premises and equipment, term (In years)	15 years
Operating leases for premises and equipment, longest term expiration date	2,105
Operating Leases, Future Minimum Payments Due, Future Minimum Sublease Rentals	$ 427
Operating Leases, Rent Expense, Net	1,300	1,300	1,300
Operating Leases, Rent Expense, Sublease Rentals	73	76	$ 86
Operating Leases, Future Minimum Payments Due [Abstract]
Operating Leases, 2019	1,174
Operating Leases, 2020	1,056
Operating Leases, 2021	880
Operating Leases, 2022	713
Operating Leases, 2023	577
Operating Leases, Thereafter	1,654
Operating Leases, Total minimum lease payments	6,054
Land [Member]
Property, Plant and Equipment [Line Items]
Total premises and equipment	1,757	1,799
Buildings [Member]
Property, Plant and Equipment [Line Items]
Total premises and equipment	8,974	8,865
Furniture and equipment [Member]
Property, Plant and Equipment [Line Items]
Total premises and equipment	6,896	7,089
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Total premises and equipment	2,387	2,291
Premises and equipment leased under capital leases [Member]
Property, Plant and Equipment [Line Items]
Total premises and equipment	$ 75	$ 103

Other Assets (Details)

Other Assets (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Components of Other Assets [Line Items]
Corporate/bank-owned life insurance	$ 19,751	$ 19,549
Accounts receivable	34,281	39,127
Interest receivable	6,084	5,688
Customer relationship and other amortized intangibles	1,988	3,034
Non-residential real estate	134	270
Operating lease assets	9,036	9,666
Due from customers on acceptances	258	177
Other	9,444	13,785
Total other assets	79,850	90,244	[1]
Government insured/guaranteed [Member]
Components of Other Assets [Line Items]
Residential real estate	88	120
Non-government insured/guaranteed [Member]
Components of Other Assets [Line Items]
Residential real estate	229	252
Core deposit intangibles [Member]
Components of Other Assets [Line Items]
Customer relationship and other amortized intangibles	0	769
Customer relationship and other amortized intangibles [Member]
Components of Other Assets [Line Items]
Customer relationship and other amortized intangibles	$ 545	$ 841
[1]	(2)Financial information for the prior period has been revised to reflect presentation changes in connection with our 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.

Equity Securities Equity Secu_3

Equity Securities Equity Securities (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Equity Securities [Line Items]
Trading equity securities	$ 19,449	$ 30,004
Fair Value of Net Asset (Liability) From Economic Hedges Related To Deferred Compensation Planned Obligation Activities	3,200	3,700
Equity Securities	55,148	62,497
Income (Loss) from Affordable Housing Projects, Equity Method Investments	1,200	1,200
Affordable Housing Tax Credits and Other Tax Benefits, Amount	1,500	1,500
Affordable Housing Tax Credits, Amount	1,200	1,100
Qualified Affordable Housing Project Investments, Commitment	$ 3,900	3,600
Affordable Housing Tax Credits Commitment, Payment Period	3 years
Not Held for Trading [Member]
Equity Securities [Line Items]
Equity Securities at Fair Value	$ 10,107	9,223
Equity Method Investments	18,215	16,352
Equity Securities Not Held for Trading	35,699	32,493
Marketable equity securities [Member] | Held for Trading [Member]
Equity Securities [Line Items]
Trading equity securities	19,449	30,004
Marketable equity securities [Member] | Not Held for Trading [Member]
Equity Securities [Line Items]
Equity Securities at Fair Value	4,513	4,356
Nonmarketable equity securities [Member]
Equity Securities [Line Items]
Equity Securities with Fair Value Option Election	5,500	4,900
Nonmarketable equity securities [Member] | Not Held for Trading [Member]
Equity Securities [Line Items]
Equity Securities at Fair Value	5,594	4,867
Low Income Housing Tax Credit Equity Method Investments [Member] | Not Held for Trading [Member]
Equity Securities [Line Items]
Equity Method Investments	10,999	10,269
Private Equity Funds [Member] | Not Held for Trading [Member]
Equity Securities [Line Items]
Equity Method Investments	3,832	3,839
Other Equity Securities	1,734	1,090
Tax Advantaged Renewable Energy [Member] | Not Held for Trading [Member]
Equity Securities [Line Items]
Equity Method Investments	3,073	1,950
New Market Tax Credit and Other [Member] | Not Held for Trading [Member]
Equity Securities [Line Items]
Equity Method Investments	311	294
Investment in Federal Reserve Bank and Federal Home Loan Bank Stock [Member]
Equity Securities [Line Items]
Other Equity Securities	5,600	5,400
Investment in Federal Reserve Bank and Federal Home Loan Bank Stock [Member] | Not Held for Trading [Member]
Equity Securities [Line Items]
Other Equity Securities	$ 5,643	$ 5,828

Equity Securities Net Gains (Lo

Equity Securities Net Gains (Losses) from Equity Securities (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Equity securities [Member]
Net Gains (Losses) from Equity Securities [Line Items]
Gain (Loss) on Investments	$ 1,515	$ 1,779	$ 1,103
Gain (Loss) on Economic Hedge Derivatives	(408)	(1,483)	125
Equity Securities at Fair Value
Net Gains (Losses) from Equity Securities [Line Items]
Gain (Loss) on Investments	320	2,524	504
Marketable equity securities [Member]
Net Gains (Losses) from Equity Securities [Line Items]
Gain (Loss) on Investments	(389)	967	525
Nonmarketable equity securities [Member]
Net Gains (Losses) from Equity Securities [Line Items]
Gain (Loss) on Investments	709	1,557	(21)
Equity Method Investments
Net Gains (Losses) from Equity Securities [Line Items]
Gain (Loss) on Investments	1,603	738	474
Impairment write-downs | Equity Method Investments
Net Gains (Losses) from Equity Securities [Line Items]
Gain (Loss) on Investments	(352)	(339)	(448)
Measurement Alternative Observable Transactions | Equity Method Investments
Net Gains (Losses) from Equity Securities [Line Items]
Gain (Loss) on Investments	418	0	0
Realized Gains on Sale | Equity Method Investments
Net Gains (Losses) from Equity Securities [Line Items]
Gain (Loss) on Investments	1,504	980	849
Other | Equity Method Investments
Net Gains (Losses) from Equity Securities [Line Items]
Gain (Loss) on Investments	$ 33	$ 97	$ 73

Equity Securities Measurement A

Equity Securities Measurement Alternative (Details) - Measurement Alternative [Member] $ in Millions	12 Months Ended
	Dec. 31, 2018USD ($)
Measurement Alternative [Line Items]
Gross unrealized gains due to observable price changes	$ 443
Gross unrealized losses due to observable price changes	(25)
Impairment write-downs	(33)
Gain (Loss) on Sale of Investments	274
Gain (Loss) on Investments	659
Cumulative gross unrealized gains due to observable price changes	415
Cumulative gross unrealized losses due to observable price changes	$ (25)

Securitizations and Variable _3

Securitizations and Variable Interest Entities, Balance Sheet Transactions with VIEs (Details) - USD ($) $ in Millions		Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Variable Interest Entity Consolidated Carrying Amount Assets and Liabilities
Cash and due from banks		$ 23,551		$ 23,367
Interest-earning deposits with banks (1)		149,736		192,580	[1]
Debt securities:
Trading debt securities		69,989		57,624	[2]
Available-for-sale, at fair value (2)		269,912		276,407	[2]
Held-to-maturity, at cost (fair value $142,115 and $138,985)		144,788		139,335
Loans		953,110	[3]	956,770	[3]	$ 967,604	$ 916,559	$ 862,551
Mortgage servicing rights		14,649		13,625
Derivative assets		10,770		12,228
Equity securities		55,148		62,497	[2]
Total other assets		79,850		90,244	[2]
Total assets	[4]	1,895,883		1,951,757
Short-term borrowings		105,787		103,256		$ 96,781
Derivative liabilities		8,499		8,796
Accrued expenses and other liabilities		69,317		70,615
Long-term debt		229,044		225,020
Total liabilities	[5]	1,698,817		1,743,678
Noncontrolling interests		900		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 and due from banks		0		0
Interest-earning deposits with banks (1)		0		0
Debt securities:
Trading debt securities		2,110		1,305
Available-for-sale, at fair value (2)		2,686		3,288
Held-to-maturity, at cost (fair value $142,115 and $138,985)		510		485
Loans		1,433		4,274
Mortgage servicing rights		14,761		13,628
Derivative assets		53		44
Equity securities		11,041		10,740
Total other assets		0		0
Total assets		32,594		33,764
Short-term borrowings		0		0
Derivative liabilities		26		106
Accrued expenses and other liabilities		231		244
Long-term debt		3,870		3,590
Total liabilities		4,127		3,940
Noncontrolling interests		0		0
Net assets		28,467		29,824
VIEs that we consolidate [Member]
Variable Interest Entity Consolidated Carrying Amount Assets and Liabilities
Cash and due from banks		139		116
Interest-earning deposits with banks (1)		8		371
Debt securities:
Trading debt securities		45		0
Available-for-sale, at fair value (2)		0		0
Held-to-maturity, at cost (fair value $142,115 and $138,985)		0		0
Loans		13,564		12,482
Mortgage servicing rights		0		0
Derivative assets		0		0
Equity securities		85		306
Total other assets		221		342
Total assets		14,062		13,617
Short-term borrowings		0		0
Derivative liabilities		0		5
Accrued expenses and other liabilities		191		132
Long-term debt		816		1,479
Total liabilities		1,007		1,616
Noncontrolling interests		34		283
Net assets		13,021		11,718
Transfers that we account for as secured borrowings [Member]
Variable Interest Entity Consolidated Carrying Amount Assets and Liabilities
Cash and due from banks		0		0
Interest-earning deposits with banks (1)		0		0
Debt securities:
Trading debt securities		200		201
Available-for-sale, at fair value (2)		317		358
Held-to-maturity, at cost (fair value $142,115 and $138,985)		0		0
Loans		94		110
Mortgage servicing rights		0		0
Derivative assets		0		0
Equity securities		0		0
Total other assets		6		6
Total assets		617		675
Short-term borrowings		493		522
Derivative liabilities		0		0
Accrued expenses and other liabilities		8		10
Long-term debt		93		111
Total liabilities		594		643
Noncontrolling interests		0		0
Net assets		23		32
Total VIE [Member]
Variable Interest Entity Consolidated Carrying Amount Assets and Liabilities
Cash and due from banks		139		116
Interest-earning deposits with banks (1)		8		371
Debt securities:
Trading debt securities		2,355		1,506
Available-for-sale, at fair value (2)		3,003		3,646
Held-to-maturity, at cost (fair value $142,115 and $138,985)		510		485
Loans		15,091		16,866
Mortgage servicing rights		14,761		13,628
Derivative assets		53		44
Equity securities		11,126		11,046
Total other assets		227		348
Total assets		47,273		48,056
Short-term borrowings		493		522
Derivative liabilities		26		111
Accrued expenses and other liabilities		430		386
Long-term debt		4,779		5,180
Total liabilities		5,728		6,199
Noncontrolling interests		34		283
Net assets		$ 41,511		$ 41,574
[1]	(1)Financial information has been revised to reflect the impact of our 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 presentation changes in connection with our 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 that we are required to carry at fair value or have elected the fair value option.
[4]	(4)Our consolidated assets at December 31, 2018 and 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, $139 million and $116 million; Interest-bearing deposits with banks, $8 million and $371 million; Debt securities, $45 million and $0 million; Net loans, $13.6 billion and $12.5 billion; Derivative assets, $0 million and $0 million; Equity securities, $85 million and $306 million; Other assets, $221 million and $342 million; and Total assets, $14.1 billion and $13.6 billion, respectively.
[5]	$221 million and $342 million; and Total assets, $14.1 billion and $13.6 billion, respectively.(5)Our consolidated liabilities at December 31, 2018 and 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, $191 million and $132 million; Long-term debt, $816 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	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Variable Interest Entity [Line Items]
Total VIE assets	$ 1,374,802	$ 1,367,437
Securitizations and Variable Interest Entities Textual [Abstract]
Carrying value of delinquent loans eligible for repurchase	1,200	$ 2,200
Percentage Of Underlying Collateral Rated As Investment Grade		100.00%
Principal amount that would be payable to securitization vehicles	1,200	$ 2,200
Conforming Residential Mortgage Loan Securitization [Member]
Variable Interest Entity [Line Items]
Total VIE assets	1,172,833	1,169,410
Other/Nonconforming Residential Mortgage Loan Securitization [Member]
Variable Interest Entity [Line Items]
Total VIE assets	10,596	14,175
Commercial [Member]
Variable Interest Entity [Line Items]
Total VIE assets	153,350	144,650
Collateralized Debt Obligations Debt Securities [Member]
Variable Interest Entity [Line Items]
Total VIE assets	659	1,031
Collateralized Debt Obligations Loans [Member]
Variable Interest Entity [Line Items]
Total VIE assets	0	1,481
Asset-based Finance Structures [Member]
Variable Interest Entity [Line Items]
Total VIE assets	304	2,333
Tax Credit Structures [Member]
Variable Interest Entity [Line Items]
Total VIE assets	35,185	31,852
Collateralized loan obligations [Member]
Variable Interest Entity [Line Items]
Total VIE assets	2	23
Investment funds [Member]
Variable Interest Entity [Line Items]
Total VIE assets	185	225
Other securitizations and transactions [Member]
Variable Interest Entity [Line Items]
Total VIE assets	1,688	2,257
Debt and equity interests [Member]
Variable Interest Entity [Line Items]
Carrying value – asset (liability)	17,780	20,092
Maximum exposure to loss	17,780	20,092
Debt and equity interests [Member] | Conforming Residential Mortgage Loan Securitization [Member]
Variable Interest Entity [Line Items]
Carrying value – asset (liability)	2,377	2,100
Maximum exposure to loss	2,377	2,100
Debt and equity interests [Member] | Other/Nonconforming Residential Mortgage Loan Securitization [Member]
Variable Interest Entity [Line Items]
Carrying value – asset (liability)	453	598
Maximum exposure to loss	453	598
Debt and equity interests [Member] | Commercial [Member]
Variable Interest Entity [Line Items]
Carrying value – asset (liability)	2,409	2,198
Maximum exposure to loss	2,409	2,198
Debt and equity interests [Member] | Collateralized Debt Obligations Debt Securities [Member]
Variable Interest Entity [Line Items]
Carrying value – asset (liability)	0	0
Maximum exposure to loss	0	0
Debt and equity interests [Member] | Collateralized Debt Obligations Loans [Member]
Variable Interest Entity [Line Items]
Carrying value – asset (liability)	0	1,443
Maximum exposure to loss	0	1,443
Debt and equity interests [Member] | Asset-based Finance Structures [Member]
Variable Interest Entity [Line Items]
Carrying value – asset (liability)	205	1,867
Maximum exposure to loss	205	1,867
Debt and equity interests [Member] | Tax Credit Structures [Member]
Variable Interest Entity [Line Items]
Carrying value – asset (liability)	12,087	11,258
Maximum exposure to loss	12,087	11,258
Debt and equity interests [Member] | Collateralized loan obligations [Member]
Variable Interest Entity [Line Items]
Carrying value – asset (liability)	0	1
Maximum exposure to loss	0	1
Debt and equity interests [Member] | Investment funds [Member]
Variable Interest Entity [Line Items]
Carrying value – asset (liability)	42	50
Maximum exposure to loss	42	50
Debt and equity interests [Member] | Other securitizations and transactions [Member]
Variable Interest Entity [Line Items]
Carrying value – asset (liability)	207	577
Maximum exposure to loss	207	577
Servicing assets [Member]
Variable Interest Entity [Line Items]
Carrying value – asset (liability)	14,761	13,628
Maximum exposure to loss	14,761	13,628
Servicing assets [Member] | Conforming Residential Mortgage Loan Securitization [Member]
Variable Interest Entity [Line Items]
Carrying value – asset (liability)	13,811	12,665
Maximum exposure to loss	13,811	12,665
Servicing assets [Member] | Other/Nonconforming Residential Mortgage Loan Securitization [Member]
Variable Interest Entity [Line Items]
Carrying value – asset (liability)	57	73
Maximum exposure to loss	57	73
Servicing assets [Member] | Commercial [Member]
Variable Interest Entity [Line Items]
Carrying value – asset (liability)	893	890
Maximum exposure to loss	893	890
Servicing assets [Member] | Collateralized Debt Obligations Debt Securities [Member]
Variable Interest Entity [Line Items]
Carrying value – asset (liability)	0	0
Maximum exposure to loss	0	0
Servicing assets [Member] | Collateralized Debt Obligations Loans [Member]
Variable Interest Entity [Line Items]
Carrying value – asset (liability)	0	0
Maximum exposure to loss	0	0
Servicing assets [Member] | Asset-based Finance Structures [Member]
Variable Interest Entity [Line Items]
Carrying value – asset (liability)	0	0
Maximum exposure to loss	0	0
Servicing assets [Member] | Tax Credit Structures [Member]
Variable Interest Entity [Line Items]
Carrying value – asset (liability)	0	0
Maximum exposure to loss	0	0
Servicing assets [Member] | Collateralized loan obligations [Member]
Variable Interest Entity [Line Items]
Carrying value – asset (liability)	0	0
Maximum exposure to loss	0	0
Servicing assets [Member] | Investment funds [Member]
Variable Interest Entity [Line Items]
Carrying value – asset (liability)	0	0
Maximum exposure to loss	0	0
Servicing assets [Member] | Other securitizations and transactions [Member]
Variable Interest Entity [Line Items]
Carrying value – asset (liability)	0	0
Maximum exposure to loss	0	0
Derivative [Member]
Variable Interest Entity [Line Items]
Carrying value – asset (liability)	27	(62)
Maximum exposure to loss	78	167
Derivative [Member] | Conforming Residential Mortgage Loan Securitization [Member]
Variable Interest Entity [Line Items]
Carrying value – asset (liability)	0	0
Maximum exposure to loss	0	0
Derivative [Member] | Other/Nonconforming Residential Mortgage Loan Securitization [Member]
Variable Interest Entity [Line Items]
Carrying value – asset (liability)	0	0
Maximum exposure to loss	0	0
Derivative [Member] | Commercial [Member]
Variable Interest Entity [Line Items]
Carrying value – asset (liability)	(22)	28
Maximum exposure to loss	28	42
Derivative [Member] | Collateralized Debt Obligations Debt Securities [Member]
Variable Interest Entity [Line Items]
Carrying value – asset (liability)	5	5
Maximum exposure to loss	5	5
Derivative [Member] | Collateralized Debt Obligations Loans [Member]
Variable Interest Entity [Line Items]
Carrying value – asset (liability)	0	0
Maximum exposure to loss	0	0
Derivative [Member] | Asset-based Finance Structures [Member]
Variable Interest Entity [Line Items]
Carrying value – asset (liability)	0	0
Maximum exposure to loss	0	0
Derivative [Member] | Tax Credit Structures [Member]
Variable Interest Entity [Line Items]
Carrying value – asset (liability)	0	0
Maximum exposure to loss	0	0
Derivative [Member] | Collateralized loan obligations [Member]
Variable Interest Entity [Line Items]
Carrying value – asset (liability)	0	0
Maximum exposure to loss	0	0
Derivative [Member] | Investment funds [Member]
Variable Interest Entity [Line Items]
Carrying value – asset (liability)	0	0
Maximum exposure to loss	0	0
Derivative [Member] | Other securitizations and transactions [Member]
Variable Interest Entity [Line Items]
Carrying value – asset (liability)	44	(95)
Maximum exposure to loss	45	120
Other commitments and guarantees [Member]
Variable Interest Entity [Line Items]
Carrying value – asset (liability)	(4,101)	(3,834)
Maximum exposure to loss	14,415	12,762
Other commitments and guarantees [Member] | Conforming Residential Mortgage Loan Securitization [Member]
Variable Interest Entity [Line Items]
Carrying value – asset (liability)	(171)	(190)
Maximum exposure to loss	1,183	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
Maximum exposure to loss	0	0
Other commitments and guarantees [Member] | Commercial [Member]
Variable Interest Entity [Line Items]
Carrying value – asset (liability)	(40)	(34)
Maximum exposure to loss	11,563	10,202
Other commitments and guarantees [Member] | Collateralized Debt Obligations Debt Securities [Member]
Variable Interest Entity [Line Items]
Carrying value – asset (liability)	(20)	(20)
Maximum exposure to loss	20	20
Other commitments and guarantees [Member] | Collateralized Debt Obligations Loans [Member]
Variable Interest Entity [Line Items]
Carrying value – asset (liability)	0	0
Maximum exposure to loss	0	0
Other commitments and guarantees [Member] | Asset-based Finance Structures [Member]
Variable Interest Entity [Line Items]
Carrying value – asset (liability)	0	0
Maximum exposure to loss	71	71
Other commitments and guarantees [Member] | Tax Credit Structures [Member]
Variable Interest Entity [Line Items]
Carrying value – asset (liability)	(3,870)	(3,590)
Maximum exposure to loss	1,420	1,175
Other commitments and guarantees [Member] | Collateralized loan obligations [Member]
Variable Interest Entity [Line Items]
Carrying value – asset (liability)	0	0
Maximum exposure to loss	0	0
Other commitments and guarantees [Member] | Investment funds [Member]
Variable Interest Entity [Line Items]
Carrying value – asset (liability)	0	0
Maximum exposure to loss	0	0
Other commitments and guarantees [Member] | Other securitizations and transactions [Member]
Variable Interest Entity [Line Items]
Carrying value – asset (liability)	0	0
Maximum exposure to loss	158	157
Net assets [Member]
Variable Interest Entity [Line Items]
Carrying value – asset (liability)	28,467	29,824
Net assets [Member] | Conforming Residential Mortgage Loan Securitization [Member]
Variable Interest Entity [Line Items]
Carrying value – asset (liability)	16,017	14,575
Net assets [Member] | Other/Nonconforming Residential Mortgage Loan Securitization [Member]
Variable Interest Entity [Line Items]
Carrying value – asset (liability)	510	671
Net assets [Member] | Commercial [Member]
Variable Interest Entity [Line Items]
Carrying value – asset (liability)	3,240	3,082
Net assets [Member] | Collateralized Debt Obligations Debt Securities [Member]
Variable Interest Entity [Line Items]
Carrying value – asset (liability)	(15)	(15)
Net assets [Member] | Collateralized Debt Obligations Loans [Member]
Variable Interest Entity [Line Items]
Carrying value – asset (liability)	0	1,443
Net assets [Member] | Asset-based Finance Structures [Member]
Variable Interest Entity [Line Items]
Carrying value – asset (liability)	205	1,867
Net assets [Member] | Tax Credit Structures [Member]
Variable Interest Entity [Line Items]
Carrying value – asset (liability)	8,217	7,668
Net assets [Member] | Collateralized loan obligations [Member]
Variable Interest Entity [Line Items]
Carrying value – asset (liability)	0	1
Net assets [Member] | Investment funds [Member]
Variable Interest Entity [Line Items]
Carrying value – asset (liability)	42	50
Net assets [Member] | Other securitizations and transactions [Member]
Variable Interest Entity [Line Items]
Carrying value – asset (liability)	251	482
Total exposure [Member]
Variable Interest Entity [Line Items]
Maximum exposure to loss	47,034	46,649
Total exposure [Member] | Conforming Residential Mortgage Loan Securitization [Member]
Variable Interest Entity [Line Items]
Maximum exposure to loss	17,371	15,902
Total exposure [Member] | Other/Nonconforming Residential Mortgage Loan Securitization [Member]
Variable Interest Entity [Line Items]
Maximum exposure to loss	510	671
Total exposure [Member] | Commercial [Member]
Variable Interest Entity [Line Items]
Maximum exposure to loss	14,893	13,332
Total exposure [Member] | Collateralized Debt Obligations Debt Securities [Member]
Variable Interest Entity [Line Items]
Maximum exposure to loss	25	25
Total exposure [Member] | Collateralized Debt Obligations Loans [Member]
Variable Interest Entity [Line Items]
Maximum exposure to loss	0	1,443
Total exposure [Member] | Asset-based Finance Structures [Member]
Variable Interest Entity [Line Items]
Maximum exposure to loss	276	1,938
Total exposure [Member] | Tax Credit Structures [Member]
Variable Interest Entity [Line Items]
Maximum exposure to loss	13,507	12,433
Total exposure [Member] | Collateralized loan obligations [Member]
Variable Interest Entity [Line Items]
Maximum exposure to loss	0	1
Total exposure [Member] | Investment funds [Member]
Variable Interest Entity [Line Items]
Maximum exposure to loss	42	50
Total exposure [Member] | Other securitizations and transactions [Member]
Variable Interest Entity [Line Items]
Maximum exposure to loss	410	854
Equity Interests [Member]
Variable Interest Entity [Line Items]
Carrying value – asset (liability)	11,000	10,700
Waived fees [Member] | VIEs that we do not consolidate [Member]
Securitizations and Variable Interest Entities Textual [Abstract]
Financial support provided to a nonconsolidated legal entity	45	53	$ 109
Trust Preferred Securities [Member]
Variable Interest Entity [Line Items]
Carrying value – asset (liability)	(2,000)	(2,000)
Securitizations and Variable Interest Entities Textual [Abstract]
Trust Preferred Securities Redeemed, Value		150
Trust Preferred Securities [Member] | Preferred stock [Member]
Securitizations and Variable Interest Entities Textual [Abstract]
Carrying Amount Of Equity Related To Unconsolidated Variable Interest Entities	2,500	2,500
Other Investments [Member]
Securitizations and Variable Interest Entities Textual [Abstract]
Securities available for sale portfolio of ARS issued by VIEs	$ 0	$ 400

Securitizations and Variable _5

Securitizations and Variable Interest Entities, Cash Flows From Sales and Securitizations Activity (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Securitizations and Variable Interest Entities Textual [Abstract]
Amount paid to third party investors to settle repurchase liabilities	$ 0	$ 0	$ 11
Amount paid to repurchase loans from securitization vehicles	7,800	8,600	9,900
Net gain from sale of asset securitization	270	701	524
Mortgage loans [Member]
Cash Flow Securitizations [Abstract]
Proceeds from securitizations and whole loan sales	193,721	228,282	252,723
Fees from servicing rights retained	3,337	3,352	3,492
Cash flows from other interests held	698	2,218	2,898
Servicing advances, net of repayments	(154)	(269)	(218)
Other financial assets [Member]
Cash Flow Securitizations [Abstract]
Proceeds from securitizations and whole loan sales	0	25	347
Fees from servicing rights retained	0	0	0
Cash flows from other interests held	1	1	1
Servicing advances, net of repayments	0	0	0
Residential Mortgage [Member]
Securitizations and Variable Interest Entities Textual [Abstract]
Amount transferred related to mortgages to unconsolidated VIE	177,800	213,600	236,600
Commercial Loan [Member]
Securitizations and Variable Interest Entities Textual [Abstract]
Net gain from sale of asset securitization	280	359	429
Amount transferred related to mortgages to unconsolidated VIE	17,900	16,700	18,300
Fair Value, Inputs, Level 3 [Member] | Residential Mortgage [Member]
Securitizations and Variable Interest Entities Textual [Abstract]
Amount of servicing asset at fair value	1,900	2,100	2,100
Amount of liability for repurchase reserves at fair value	17	24	36
Fair Value, Inputs, Level 3 [Member] | Commercial Loan [Member]
Securitizations and Variable Interest Entities Textual [Abstract]
Amount of servicing asset at fair value	158	166	270
Fair Value, Inputs, Level 2 [Member] | Residential Mortgage [Member]
Securitizations and Variable Interest Entities Textual [Abstract]
Securities, at fair value	5,000	1,400	4,400
Fair Value, Inputs, Level 2 [Member] | Commercial Loan [Member]
Securitizations and Variable Interest Entities Textual [Abstract]
Securities, at fair value	81	65	258
Non-agency securitizations and whole loan transactions [Member] | Mortgage loans [Member]
Cash Flow Securitizations [Abstract]
Repurchases of assets/loss reimbursements	3	12	26
Non-agency securitizations and whole loan transactions [Member] | Other financial assets [Member]
Cash Flow Securitizations [Abstract]
Repurchases of assets/loss reimbursements	0	0	0
Agency securitizations | Mortgage loans [Member]
Cash Flow Securitizations [Abstract]
Repurchases of assets/loss reimbursements	96	92	133
Agency securitizations | Other financial assets [Member]
Cash Flow Securitizations [Abstract]
Repurchases of assets/loss reimbursements	$ 0	$ 0	$ 0

Securitizations and Variable _6

Securitizations and Variable Interest Entities, Residential Mortgage Servicing Rights (Details) - Residential mortgage servicing rights [Member] - $ / loan	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Fair Value Assumption, Date of Securitization or Asset-backed Financing Arrangement, Transferor's Continuing Involvement, Servicing Assets or Liabilities [Line Items]
Prepayment speed	10.60%	11.50%	11.70%
Discount rate	7.40%	7.00%	6.50%
Cost to service ($ per loan)	128	132	132

Securitizations and Variable _7

Securitizations and Variable Interest Entities, Retained Interests from Unconsolidated VIEs (Details) $ in Millions	12 Months Ended
	Dec. 31, 2018USD ($)$ / loan	Dec. 31, 2017USD ($)$ / loan
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	$ 2,300	$ 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	$ 320	$ 278
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	$ 14,649	$ 13,625
Expected weighted-average life (in years)	6 years 6 months	6 years 2 months 12 days
Key economic assumptions:
Prepayment speed assumption	9.90%	10.50%
Decrease in fair value from:
10% adverse change	$ 530	$ 565
25% adverse change	$ 1,301	$ 1,337
Discount rate assumption	8.10%	6.90%
Decrease in fair value from:
100 basis point increase	$ 615	$ 652
200 basis point increase	$ 1,176	$ 1,246
Cost to service assumption ($ per loan) | $ / loan	106	143
Decrease in fair value from:
10% adverse change	$ 316	$ 467
25% adverse change	787	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	$ 16	$ 19
Expected weighted-average life (in years)	3 years 7 months 6 days	3 years 3 months 18 days
Key economic assumptions:
Prepayment speed assumption	17.70%	20.00%
Decrease in fair value from:
10% adverse change	$ 1	$ 1
25% adverse change	$ 1	$ 2
Discount rate assumption	14.50%	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	$ 668	$ 596
Expected weighted-average life (in years)	7 years	6 years 8 months 12 days
Decrease in fair value from:
Discount rate assumption	4.30%	4.10%
Decrease in fair value from:
100 basis point increase	$ 37	$ 32
200 basis point increase	$ 72	$ 61
Decrease in fair value from:
Credit loss assumption	5.10%	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	$ 309	$ 468
Expected weighted-average life (in years)	5 years 8 months 12 days	5 years 2 months 12 days
Decrease in fair value from:
Discount rate assumption	3.70%	3.10%
Decrease in fair value from:
100 basis point increase	$ 14	$ 20
200 basis point increase	$ 28	$ 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

Securitizations and Variable _8

Securitizations and Variable Interest Entities, Off-Balance Sheet Loans Sold or Securitized (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Principal Balances - Off-Balance Sheet Securitized Loans [Abstract]
Total loans	$ 1,202,301	$ 1,227,083
Delinquent loans and foreclosed assets	9,955	16,232
Net charge-offs	1,205	1,762
Total Commercial [Member]
Principal Balances - Off-Balance Sheet Securitized Loans [Abstract]
Total loans	105,173	100,875
Delinquent loans and foreclosed assets	1,008	2,839
Net charge-offs	739	1,027
Securitizations and Variable Interest Entities Textual [Abstract]
Foreclosed assets	675	1,200
Commercial Real Estate Mortgage [Member]
Principal Balances - Off-Balance Sheet Securitized Loans [Abstract]
Total loans	105,173	100,875
Delinquent loans and foreclosed assets	1,008	2,839
Net charge-offs	739	1,027
Total Consumer [Member]
Principal Balances - Off-Balance Sheet Securitized Loans [Abstract]
Total loans	1,097,128	1,126,208
Delinquent loans and foreclosed assets	8,947	13,393
Net charge-offs	466	735
Securitizations and Variable Interest Entities Textual [Abstract]
Foreclosed assets	582	879
Real estate 1-4 family first mortgage [Member]
Principal Balances - Off-Balance Sheet Securitized Loans [Abstract]
Total loans	1,097,128	1,126,208
Delinquent loans and foreclosed assets	8,947	13,393
Net charge-offs	466	735
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	442	619
Delinquent loans	$ 6,400	$ 9,100

Securitizations and Variable _9

Securitizations and Variable Interest Entities, Transactions with Consolidated VIEs and Secured Borrowings (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017
Variable Interest Entity [Line Items]
Assets	[1]	$ 1,895,883	$ 1,951,757
Liabilities	[2]	(1,698,817)	(1,743,678)
Noncontrolling interests		$ (900)	(1,143)
Securitizations and Variable Interest Entities Textual [Abstract]
Floating-rate investors right to tender period		7 days
Total secured borrowings [Member]
Variable Interest Entity [Line Items]
Total VIE assets		$ 722	771
Total secured borrowings [Member] | Carrying value [Member]
Variable Interest Entity [Line Items]
Assets		617	675
Liabilities		(594)	(643)
Noncontrolling interests		0	0
Net assets		23	32
Total secured borrowings [Member] | Municipal tender option bond securitizations [Member]
Variable Interest Entity [Line Items]
Total VIE assets		627	658
Total secured borrowings [Member] | Municipal tender option bond securitizations [Member] | Carrying value [Member]
Variable Interest Entity [Line Items]
Assets		523	565
Liabilities		(501)	(532)
Noncontrolling interests		0	0
Net assets		22	33
Total secured borrowings [Member] | Residential mortgage securitizations [Member]
Variable Interest Entity [Line Items]
Total VIE assets		95	113
Total secured borrowings [Member] | Residential mortgage securitizations [Member] | Carrying value [Member]
Variable Interest Entity [Line Items]
Assets		94	110
Liabilities		(93)	(111)
Noncontrolling interests		0	0
Net assets		1	(1)
Consolidated VIEs [Member]
Variable Interest Entity [Line Items]
Total VIE assets		14,288	14,424
Assets		14,062	13,617
Liabilities		(1,007)	(1,616)
Noncontrolling interests		(34)	(283)
Net assets		13,021	11,718
Consolidated VIEs [Member] | Carrying value [Member]
Variable Interest Entity [Line Items]
Assets		14,062	13,617
Liabilities		(1,007)	(1,616)
Noncontrolling interests		(34)	(283)
Net assets		13,021	11,718
Consolidated VIEs [Member] | Commercial and Industrial Loans and Leases [Member]
Variable Interest Entity [Line Items]
Total VIE assets		8,215	9,116
Consolidated VIEs [Member] | Commercial and Industrial Loans and Leases [Member] | Carrying value [Member]
Variable Interest Entity [Line Items]
Assets		8,204	8,626
Liabilities		(477)	(915)
Noncontrolling interests		(14)	(29)
Net assets		7,713	7,682
Consolidated VIEs [Member] | Nonconforming residential mortgage loan securitizations [Member]
Variable Interest Entity [Line Items]
Total VIE assets		1,947	2,515
Consolidated VIEs [Member] | Nonconforming residential mortgage loan securitizations [Member] | Carrying value [Member]
Variable Interest Entity [Line Items]
Assets		1,732	2,212
Liabilities		(521)	(694)
Noncontrolling interests		0	0
Net assets		1,211	1,518
Consolidated VIEs [Member] | Commercial Real Estate Loans [Member]
Variable Interest Entity [Line Items]
Total VIE assets		3,957	2,378
Consolidated VIEs [Member] | Commercial Real Estate Loans [Member] | Carrying value [Member]
Variable Interest Entity [Line Items]
Assets		3,957	2,378
Liabilities		0	0
Noncontrolling interests		0	0
Net assets		3,957	2,378
Consolidated VIEs [Member] | Structured asset finance [Member]
Variable Interest Entity [Line Items]
Total VIE assets		0	10
Consolidated VIEs [Member] | Structured asset finance [Member] | Carrying value [Member]
Variable Interest Entity [Line Items]
Assets		0	6
Liabilities		0	(4)
Noncontrolling interests		0	0
Net assets		0	2
Consolidated VIEs [Member] | Investment funds [Member]
Variable Interest Entity [Line Items]
Total VIE assets		155	305
Consolidated VIEs [Member] | Investment funds [Member] | Carrying value [Member]
Variable Interest Entity [Line Items]
Assets		155	305
Liabilities		(5)	(2)
Noncontrolling interests		(15)	(230)
Net assets		135	73
Consolidated VIEs [Member] | Other securitizations and transactions [Member]
Variable Interest Entity [Line Items]
Total VIE assets		14	100
Consolidated VIEs [Member] | Other securitizations and transactions [Member] | Carrying value [Member]
Variable Interest Entity [Line Items]
Assets		14	90
Liabilities		(4)	(1)
Noncontrolling interests		(5)	(24)
Net assets		5	65
Total secured borrowings and consolidated VIEs [Member]
Variable Interest Entity [Line Items]
Total VIE assets		15,010	15,195
Total secured borrowings and consolidated VIEs [Member] | Carrying value [Member]
Variable Interest Entity [Line Items]
Assets		14,679	14,292
Liabilities		(1,601)	(2,259)
Noncontrolling interests		(34)	(283)
Net assets		13,044	11,750
Revolving master trust entity [Member] | Commercial and Industrial Loans and Leases [Member]
Variable Interest Entity [Line Items]
Total VIE assets		6,700	7,600
Liabilities		(299)	(773)
Securitized term trust and other entities [Member] | Commercial and Industrial Loans and Leases [Member]
Variable Interest Entity [Line Items]
Total VIE assets		$ 1,500	$ 1,400
[1]	(4)Our consolidated assets at December 31, 2018 and 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, $139 million and $116 million; Interest-bearing deposits with banks, $8 million and $371 million; Debt securities, $45 million and $0 million; Net loans, $13.6 billion and $12.5 billion; Derivative assets, $0 million and $0 million; Equity securities, $85 million and $306 million; Other assets, $221 million and $342 million; and Total assets, $14.1 billion and $13.6 billion, respectively.
[2]	$221 million and $342 million; and Total assets, $14.1 billion and $13.6 billion, respectively.(5)Our consolidated liabilities at December 31, 2018 and 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, $191 million and $132 million; Long-term debt, $816 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	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Changes in MSRs measured at fair value
Fair value, beginning of year	$ 13,625
Changes in fair value:
Net changes in valuation model inputs or assumptions	960	$ (126)	$ 565
Changes due to collection/realization of expected cash flows over time	(1,875)	(1,989)	(2,160)
Total changes in fair value	(915)	(2,115)	(1,595)
Fair value, end of year	14,649	13,625
Carried at fair value [Member]
Changes in MSRs measured at fair value
Fair value, beginning of year	13,625	12,959	12,415
Purchases	0	541	0
Servicing from securitizations or asset transfers	2,010	2,263	2,204
Sales and other (2)	(71)	(23)	(65)
Net additions	1,939	2,781	2,139
Changes in fair value:
Net changes in valuation model inputs or assumptions	960	(126)	565
Changes due to collection/realization of expected cash flows over time	(1,875)	(1,989)	(2,160)
Total changes in fair value	(915)	(2,115)	(1,595)
Fair value, end of year	14,649	13,625	12,959
Carried at fair value [Member] | Mortgage interest rates [Member]
Changes in fair value:
Net changes in valuation model inputs or assumptions	1,337	(103)	543
Carried at fair value [Member] | Servicing and foreclosure costs [Member]
Changes in fair value:
Net changes in valuation model inputs or assumptions	818	96	106
Carried at fair value [Member] | Discount rates [Member]
Changes in fair value:
Net changes in valuation model inputs or assumptions	(830)	13	0
Carried at fair value [Member] | Prepayment estimates and other [Member]
Changes in fair value:
Net changes in valuation model inputs or assumptions	$ (365)	$ (132)	$ (84)

Mortgage Banking Activities, _2

Mortgage Banking Activities, Analysis of Changes in Amortized MSRs (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Changes in amortized MSRs
Amortization	$ (266)	$ (263)	$ (269)
Amortized [Member]
Changes in amortized MSRs
Balance, beginning of year	1,424	1,406	1,308
Purchases	127	115	97
Servicing from securitizations or asset transfers	158	166	270
Amortization	(266)	(263)	(269)
Balance, end of year	1,443	1,424	1,406
Fair value of amortized MSRs:
Beginning of year	2,025	1,956	1,680
End of year	2,288	2,025	1,956
Commercial mortgage servicing [Member] | Amortized [Member]
Mortgage Banking Activities Textual [Abstract]
Valuation allowance	$ 0	$ 0	$ 0

Mortgage Banking Activities, Ma

Mortgage Banking Activities, Managed Servicing Portfolio (Details) - USD ($) $ in Billions	Dec. 31, 2018	Dec. 31, 2017
Components of Managed Servicing Portfolio [Abstract]
Serviced for others	$ 1,707	$ 1,704
Total managed servicing portfolio	$ 2,175	$ 2,185
Ratio of MSRs to related loans serviced for others	0.94%	0.88%
Residential mortgage servicing rights [Member]
Components of Managed Servicing Portfolio [Abstract]
Serviced for others	$ 1,164	$ 1,209
Owned loans serviced	334	342
Subserviced for others	4	3
Total managed servicing portfolio	1,502	1,554
Commercial mortgage servicing [Member]
Components of Managed Servicing Portfolio [Abstract]
Serviced for others	543	495
Owned loans serviced	121	127
Subserviced for others	9	9
Total managed servicing portfolio	$ 673	$ 631

Mortgage Banking Activities, Mo

Mortgage Banking Activities, Mortgage Banking Noninterest Income (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Servicing fees:
Contractually specified servicing fees	$ 3,613	$ 3,603	$ 3,778
Late charges	162	172	180
Ancillary fees	182	199	229
Unreimbursed direct servicing costs	(331)	(582)	(819)
Net servicing fees	3,626	3,392	3,368
Changes in fair value of MSRs carried at fair value:
Due to changes in valuation model inputs or assumptions	960	(126)	565
Changes due to collection/realization of expected cash flows over time	(1,875)	(1,989)	(2,160)
Total changes in fair value of MSRs carried at fair value	(915)	(2,115)	(1,595)
Amortization	(266)	(263)	(269)
Net derivative gains (losses) from economic hedges	(1,072)	413	261
Total servicing income, net	1,373	1,427	1,765
Net gains on mortgage loan origination/sales activities	1,644	2,923	4,331
Total mortgage banking noninterest income	3,017	4,350	6,096
Market-related valuation changes to MSRs, net of hedge results	$ (112)	$ 287	$ 826

Intangible Assets (Details)

Intangible Assets (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Amortized intangible assets:
Gross carrying value	$ 20,989	$ 20,704
Accumulated amortization	(19,001)	(17,670)
Net carrying value	1,988	3,034
Unamortized intangible assets:
Mortgage servicing rights	14,649	13,625
Goodwill	26,418	26,587	$ 26,693
Trademark	14	14
MSRs [Member]
Amortized intangible assets:
Gross carrying value	4,161	3,876
Accumulated amortization	(2,718)	(2,452)
Net carrying value	1,443	1,424
Core deposit intangibles [Member]
Amortized intangible assets:
Gross carrying value	12,834	12,834
Accumulated amortization	(12,834)	(12,065)
Net carrying value	0	769
Customer relationship and other intangibles [Member]
Amortized intangible assets:
Gross carrying value	3,994	3,994
Accumulated amortization	(3,449)	(3,153)
Net carrying value	$ 545	$ 841

Intangible Assets, Amortization

Intangible Assets, Amortization Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets, Future Amortization Expense, Current and Five Succeeding Fiscal Years [Abstract]
Year ended December 31, 2018 (actual)	$ 1,058	$ 1,152	$ 1,192
Estimate for year ended December 31,
2,019	376
2,020	330
2,021	283
2,022	247
2,023	209
Finite lived intangible assets [Member]
Finite-Lived Intangible Assets, Future Amortization Expense, Current and Five Succeeding Fiscal Years [Abstract]
Year ended December 31, 2018 (actual)	1,334
Amortized MSRs [Member]
Finite-Lived Intangible Assets, Future Amortization Expense, Current and Five Succeeding Fiscal Years [Abstract]
Year ended December 31, 2018 (actual)	266
Estimate for year ended December 31,
2,019	260
2,020	233
2,021	200
2,022	178
2,023	150
Core deposit intangibles [Member]
Finite-Lived Intangible Assets, Future Amortization Expense, Current and Five Succeeding Fiscal Years [Abstract]
Year ended December 31, 2018 (actual)	769
Estimate for year ended December 31,
2,019	0
2,020	0
2,021	0
2,022	0
2,023	0
Customer relationship and other intangibles [Member]
Finite-Lived Intangible Assets, Future Amortization Expense, Current and Five Succeeding Fiscal Years [Abstract]
Year ended December 31, 2018 (actual)	299
Estimate for year ended December 31,
2,019	116
2,020	97
2,021	83
2,022	69
2,023	59
Lease Agreements [Member]
Finite-Lived Intangible Assets, Future Amortization Expense, Current and Five Succeeding Fiscal Years [Abstract]
Year ended December 31, 2018 (actual)	$ 10

Intangible Assets, Allocation o

Intangible Assets, Allocation of Goodwill to Operating Segments (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Goodwill [Roll Forward]
Goodwill, Beginning Balance	$ 26,587	$ 26,693
Reclassification of goodwill held for sale to other assets	(155)	(116)
Reduction in goodwill related to divested businesses and other	(14)	(14)
Goodwill from business combinations		24
Goodwill, Ending Balance (suppressed)	26,418	26,587
Goodwill classified as held-for-sale in other assets	$ 0	13
Minimum [Member]
Goodwill [Roll Forward]
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount	42.00%
Maximum [Member]
Goodwill [Roll Forward]
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount	544.00%
Community Banking [Member]
Goodwill [Roll Forward]
Goodwill, Beginning Balance	$ 16,849	16,849
Reclassification of goodwill held for sale to other assets	(155)	0
Reduction in goodwill related to divested businesses and other	(9)	0
Goodwill from business combinations		0
Goodwill, Ending Balance (suppressed)	16,685	16,849
Wholesale Banking [Member]
Goodwill [Roll Forward]
Goodwill, Beginning Balance	8,455	8,585
Reclassification of goodwill held for sale to other assets	0	(116)
Reduction in goodwill related to divested businesses and other	(5)	(14)
Goodwill from business combinations		0
Goodwill, Ending Balance (suppressed)	8,450	8,455
Wealth and Investment Management [Member]
Goodwill [Roll Forward]
Goodwill, Beginning Balance	1,283	1,259
Reclassification of goodwill held for sale to other assets	0	0
Reduction in goodwill related to divested businesses and other	0	0
Goodwill from business combinations		24
Goodwill, Ending Balance (suppressed)	$ 1,283	$ 1,283

Deposits (Details)

Deposits (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Time Deposits [Line Items]
Time certificates of deposit and other time deposits issued by domestic and foreign offices	$ 130,645	$ 128,600
Time Deposits, Fiscal Year Maturity [Abstract]
2,019	88,435
2,020	25,986
2,021	6,324
2,022	3,320
2,023	2,868
Thereafter	3,712
Total	130,645	128,600
Deposits (Textuals) [Abstract]
Demand deposit overdrafts as loan balances	624	371
Geographic Distribution, Domestic [Member]
Time Deposits [Line Items]
Time Deposits, $100,000 or More	42,465	52,700
Time Deposits, $250,000 or more	37,100	46,900
Contractual Maturities, Time Deposits, $100,000 or More [Abstract]
Three months or less	13,724
After three months through six months	12,292
After six months through twelve months	12,945
After twelve months	3,504
Geographic Distribution, Foreign [Member]
Time Deposits [Line Items]
Time Deposits, $100,000 or More	4,600	13,400
Time Deposits, $250,000 or more	$ 4,600	$ 13,400

Short-Term Borrowings (Details)

Short-Term Borrowings (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Short-term Debt [Line Items]
Short-term borrowings maturity period (less than 30 days)	30 days	30 days	30 days
Short-term borrowings	$ 105,787	$ 103,256	$ 96,781
Short-term Borrowings, Rate	2.52%	1.22%	0.19%
Short-term Debt average daily balance, Amount	$ 104,267	$ 98,922	$ 115,187
Short-term Debt average daily balance, Rate	1.65%	0.77%	0.29%
Federal Funds Purchased and Securities Sold under Agreements to Repurchase [Member]
Short-term Debt [Line Items]
Short-term borrowings	$ 92,430	$ 88,684	$ 78,124
Short-term Borrowings, Rate	2.65%	1.30%	0.17%
Short-term Debt average daily balance, Amount	$ 90,348	$ 82,507	$ 99,955
Short-term Debt average daily balance, Rate	1.78%	0.90%	0.33%
Maximum month-end balance, Amount	$ 93,918	$ 91,604	$ 109,645
Commercial Paper [Member]
Short-term Debt [Line Items]
Short-term borrowings	$ 0	$ 0	$ 120
Short-term Borrowings, Rate	0.00%	0.00%	0.93%
Short-term Debt average daily balance, Amount	$ 0	$ 16	$ 256
Short-term Debt average daily balance, Rate	0.00%	0.95%	0.86%
Maximum month-end balance, Amount	$ 0	$ 78	$ 519
Other Short-term Borrowings [Member]
Short-term Debt [Line Items]
Short-term borrowings	$ 13,357	$ 14,572	$ 18,537
Short-term Borrowings, Rate	1.63%	0.72%	0.28%
Short-term Debt average daily balance, Amount	$ 13,919	$ 16,399	$ 14,976
Short-term Debt average daily balance, Rate	0.79%	0.13%	0.02%
Maximum month-end balance, Amount	$ 16,924	$ 19,439	$ 18,537

Long-term Debt, Summary (Detail

Long-term Debt, Summary (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Long-term debt	$ 229,044	$ 225,020
VIEs that we consolidate [Member]
Debt Instrument [Line Items]
Long-term debt	816	1,479
Wells Fargo Bank, N.A. and other bank entities [Member]
Debt Instrument [Line Items]
Long-term debt	$ 91,399	75,238
Wells Fargo Bank, N.A. and other bank entities [Member] | Fixed-rate notes [Member] | VIEs that we consolidate [Member]
Debt Instrument [Line Items]
Maturity date(s) Start	Jan. 1, 2020
Maturity date(s) End	Dec. 31, 2047
Other Long-Term Debt	$ 160	268
Wells Fargo Bank, N.A. and other bank entities [Member] | Fixed-rate notes [Member] | VIEs that we consolidate [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest Rate, Stated Percentage	6.00%
Wells Fargo Bank, N.A. and other bank entities [Member] | Fixed-rate notes [Member] | VIEs that we consolidate [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest Rate, Stated Percentage	6.00%
Wells Fargo Bank, N.A. and other bank entities [Member] | Floating-rate notes [Member] | VIEs that we consolidate [Member]
Debt Instrument [Line Items]
Maturity date(s) Start	Jan. 1, 2020
Maturity date(s) End	Dec. 31, 2047
Other Long-Term Debt	$ 656	1,211
Wells Fargo Bank, N.A. and other bank entities [Member] | Floating-rate notes [Member] | VIEs that we consolidate [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest Rate, Stated Percentage	2.46%
Wells Fargo Bank, N.A. and other bank entities [Member] | Floating-rate notes [Member] | VIEs that we consolidate [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest Rate, Stated Percentage	13.02%
Wells Fargo Bank, N.A. and other bank entities [Member] | Senior debt [Member]
Debt Instrument [Line Items]
Senior Notes	$ 78,395	60,718
Long-term debt	$ 78,395
Wells Fargo Bank, N.A. and other bank entities [Member] | Senior debt [Member] | Fixed-rate notes [Member]
Debt Instrument [Line Items]
Maturity date(s) Start	Jan. 1, 2019
Maturity date(s) End	Dec. 31, 2023
Senior Notes	$ 14,222	7,732
Wells Fargo Bank, N.A. and other bank entities [Member] | Senior debt [Member] | Fixed-rate notes [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest Rate, Stated Percentage	1.75%
Wells Fargo Bank, N.A. and other bank entities [Member] | Senior debt [Member] | Fixed-rate notes [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest Rate, Stated Percentage	3.63%
Wells Fargo Bank, N.A. and other bank entities [Member] | Senior debt [Member] | Floating-rate notes [Member]
Debt Instrument [Line Items]
Maturity date(s) Start	Jan. 1, 2019
Maturity date(s) End	Dec. 31, 2053
Senior Notes	$ 6,617	4,317
Wells Fargo Bank, N.A. and other bank entities [Member] | Senior debt [Member] | Floating-rate notes [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest Rate, Stated Percentage	2.33%
Wells Fargo Bank, N.A. and other bank entities [Member] | Senior debt [Member] | Floating-rate notes [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest Rate, Stated Percentage	3.57%
Wells Fargo Bank, N.A. and other bank entities [Member] | Senior debt [Member] | FixFloat Notes [Member]
Debt Instrument [Line Items]
Maturity date(s) Start	Jan. 1, 2021
Maturity date(s) End	Dec. 31, 2021
Senior Notes	$ 1,998	0
Wells Fargo Bank, N.A. and other bank entities [Member] | Senior debt [Member] | FixFloat Notes [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest Rate, Stated Percentage	3.33%
Wells Fargo Bank, N.A. and other bank entities [Member] | Senior debt [Member] | FixFloat Notes [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest Rate, Stated Percentage	3.33%
Wells Fargo Bank, N.A. and other bank entities [Member] | Senior debt [Member] | Structured Notes [Member]
Debt Instrument [Line Items]
Maturity date(s) Start	Jan. 1, 2019
Maturity date(s) End	Dec. 31, 2037
Senior Notes	$ 1,646	743
Wells Fargo Bank, N.A. and other bank entities [Member] | Senior debt [Member] | Fixed-rate Advances - FHLB [Member]
Debt Instrument [Line Items]
Maturity date(s) Start	Jan. 1, 2019
Maturity date(s) End	Dec. 31, 2031
Senior Notes	$ 51	62
Wells Fargo Bank, N.A. and other bank entities [Member] | Senior debt [Member] | Fixed-rate Advances - FHLB [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest Rate, Stated Percentage	3.83%
Wells Fargo Bank, N.A. and other bank entities [Member] | Senior debt [Member] | Fixed-rate Advances - FHLB [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest Rate, Stated Percentage	7.50%
Wells Fargo Bank, N.A. and other bank entities [Member] | Senior debt [Member] | Floating-rate Advances - FHLB [Member]
Debt Instrument [Line Items]
Maturity date(s) Start	Jan. 1, 2019
Maturity date(s) End	Dec. 31, 2021
Senior Notes	$ 53,825	47,825
Wells Fargo Bank, N.A. and other bank entities [Member] | Senior debt [Member] | Floating-rate Advances - FHLB [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest Rate, Stated Percentage	2.44%
Wells Fargo Bank, N.A. and other bank entities [Member] | Senior debt [Member] | Floating-rate Advances - FHLB [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest Rate, Stated Percentage	3.28%
Wells Fargo Bank, N.A. and other bank entities [Member] | Senior debt [Member] | Capital Leases [Member]
Debt Instrument [Line Items]
Maturity date(s) Start	Jan. 1, 2019
Maturity date(s) End	Dec. 31, 2029
Senior Notes	$ 36	39
Wells Fargo Bank, N.A. and other bank entities [Member] | Senior debt [Member] | Capital Leases [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest Rate, Stated Percentage	2.87%
Wells Fargo Bank, N.A. and other bank entities [Member] | Senior debt [Member] | Capital Leases [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest Rate, Stated Percentage	17.78%
Wells Fargo Bank, N.A. and other bank entities [Member] | Senior subordinated debt [Member]
Debt Instrument [Line Items]
Subordinated Notes	$ 5,199	5,408
Long-term debt	$ 5,199
Wells Fargo Bank, N.A. and other bank entities [Member] | Senior subordinated debt [Member] | Fixed-rate notes [Member]
Debt Instrument [Line Items]
Maturity date(s) Start	Jan. 1, 2023
Maturity date(s) End	Dec. 31, 2038
Subordinated Notes	$ 5,199	5,408
Wells Fargo Bank, N.A. and other bank entities [Member] | Senior subordinated debt [Member] | Fixed-rate notes [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest Rate, Stated Percentage	5.25%
Wells Fargo Bank, N.A. and other bank entities [Member] | Senior subordinated debt [Member] | Fixed-rate notes [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest Rate, Stated Percentage	7.74%
Wells Fargo Bank, N.A. and other bank entities [Member] | Junior subordinated debt [Member]
Debt Instrument [Line Items]
Junior Subordinated Notes	$ 352	342
Long-term debt	$ 352
Wells Fargo Bank, N.A. and other bank entities [Member] | Junior subordinated debt [Member] | Floating-rate notes [Member]
Debt Instrument [Line Items]
Maturity date(s) Start	Jan. 1, 2027
Maturity date(s) End	Dec. 31, 2027
Junior Subordinated Notes	$ 352	342
Wells Fargo Bank, N.A. and other bank entities [Member] | Junior subordinated debt [Member] | Floating-rate notes [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest Rate, Stated Percentage	3.09%
Wells Fargo Bank, N.A. and other bank entities [Member] | Junior subordinated debt [Member] | Floating-rate notes [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest Rate, Stated Percentage	3.19%
Wells Fargo Bank, N.A. and other bank entities [Member] | Mortgage loans [Member]
Debt Instrument [Line Items]
Maturity date(s) Start	Jan. 1, 2019
Maturity date(s) End	Dec. 31, 2057
Other Long-Term Debt	$ 6,637	7,291
Wells Fargo Bank, N.A. and other bank entities [Member] | Mortgage loans [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest Rate, Stated Percentage	0.20%
Wells Fargo Bank, N.A. and other bank entities [Member] | Mortgage loans [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest Rate, Stated Percentage	9.20%
Other Consolidated Subsidiaries [Member]
Debt Instrument [Line Items]
Long-term debt	$ 2,421	3,464
Other Consolidated Subsidiaries [Member] | Senior debt [Member]
Debt Instrument [Line Items]
Senior Notes	2,389	3,391
Long-term debt	$ 2,389
Other Consolidated Subsidiaries [Member] | Senior debt [Member] | Fixed-rate notes [Member]
Debt Instrument [Line Items]
Maturity date(s) Start	Jan. 1, 2019
Maturity date(s) End	Dec. 31, 2023
Senior Notes	$ 2,383	3,390
Other Consolidated Subsidiaries [Member] | Senior debt [Member] | Fixed-rate notes [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest Rate, Stated Percentage	2.94%
Other Consolidated Subsidiaries [Member] | Senior debt [Member] | Fixed-rate notes [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest Rate, Stated Percentage	3.46%
Other Consolidated Subsidiaries [Member] | Senior debt [Member] | Structured Notes [Member]
Debt Instrument [Line Items]
Maturity date(s) Start	Jan. 1, 2021
Maturity date(s) End	Dec. 31, 2028
Senior Notes	$ 6	1
Other Consolidated Subsidiaries [Member] | Mortgage loans [Member]
Debt Instrument [Line Items]
Maturity date(s) Start	Jan. 1, 2026
Maturity date(s) End	Dec. 31, 2026
Other Long-Term Debt	$ 32	73
Other Consolidated Subsidiaries [Member] | Mortgage loans [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest Rate, Stated Percentage	4.08%
Other Consolidated Subsidiaries [Member] | Mortgage loans [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest Rate, Stated Percentage	4.08%
Wells Fargo & Company [Member]
Debt Instrument [Line Items]
Long-term debt	$ 135,079	146,130
Wells Fargo & Company [Member] | Notes issued by parent at discount [Member] | Fixed-rate notes [Member]
Debt Instrument [Line Items]
Subordinated Notes	131	133
Debt Issuance Costs, Gross	2	2
Affiliate Related Deferred Finance Costs, Gross	278	323
Wells Fargo & Company [Member] | Senior debt [Member]
Debt Instrument [Line Items]
Senior Notes	108,180	117,518
Long-term debt	$ 108,180
Wells Fargo & Company [Member] | Senior debt [Member] | Fixed-rate notes [Member]
Debt Instrument [Line Items]
Maturity date(s) Start	Jan. 1, 2019
Maturity date(s) End	Dec. 31, 2045
Senior Notes	$ 77,742	84,652
Wells Fargo & Company [Member] | Senior debt [Member] | Fixed-rate notes [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest Rate, Stated Percentage	0.38%
Wells Fargo & Company [Member] | Senior debt [Member] | Fixed-rate notes [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest Rate, Stated Percentage	6.75%
Wells Fargo & Company [Member] | Senior debt [Member] | Fixed-rate notes [Member] | Deferrable Notes [Member]
Debt Instrument [Line Items]
Senior Notes	$ 59
Wells Fargo & Company [Member] | Senior debt [Member] | Fixed-rate notes [Member] | Deferrable Notes [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest Rate, Stated Percentage	0.00%
Wells Fargo & Company [Member] | Senior debt [Member] | Fixed-rate notes [Member] | Deferrable Notes [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest Rate, Stated Percentage	0.00%
Wells Fargo & Company [Member] | Senior debt [Member] | Floating-rate notes [Member]
Debt Instrument [Line Items]
Maturity date(s) Start	Jan. 1, 2019
Maturity date(s) End	Dec. 31, 2048
Senior Notes	$ 19,553	22,463
Wells Fargo & Company [Member] | Senior debt [Member] | Floating-rate notes [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest Rate, Stated Percentage	0.10%
Wells Fargo & Company [Member] | Senior debt [Member] | Floating-rate notes [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest Rate, Stated Percentage	4.08%
Wells Fargo & Company [Member] | Senior debt [Member] | FixFloat Notes [Member]
Debt Instrument [Line Items]
Maturity date(s) Start	Jan. 1, 2028
Maturity date(s) End	Dec. 31, 2028
Senior Notes	$ 2,901	2,961
Wells Fargo & Company [Member] | Senior debt [Member] | FixFloat Notes [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest Rate, Stated Percentage	3.58%
Wells Fargo & Company [Member] | Senior debt [Member] | FixFloat Notes [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest Rate, Stated Percentage	3.58%
Wells Fargo & Company [Member] | Senior debt [Member] | Structured Notes [Member]
Debt Instrument [Line Items]
Maturity date(s) Start	Jan. 1, 2019
Maturity date(s) End	Dec. 31, 2056
Senior Notes	$ 7,984	7,442
Wells Fargo & Company [Member] | Senior subordinated debt [Member]
Debt Instrument [Line Items]
Subordinated Notes	25,428	27,132
Long-term debt	$ 25,428
Wells Fargo & Company [Member] | Senior subordinated debt [Member] | Fixed-rate notes [Member]
Debt Instrument [Line Items]
Maturity date(s) Start	Jan. 1, 2023
Maturity date(s) End	Dec. 31, 2046
Subordinated Notes	$ 25,428	27,132
Wells Fargo & Company [Member] | Senior subordinated debt [Member] | Fixed-rate notes [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest Rate, Stated Percentage	3.45%
Wells Fargo & Company [Member] | Senior subordinated debt [Member] | Fixed-rate notes [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest Rate, Stated Percentage	7.57%
Wells Fargo & Company [Member] | Junior subordinated debt [Member]
Debt Instrument [Line Items]
Junior Subordinated Notes	$ 1,616	1,668
Long-term debt	$ 1,616
Wells Fargo & Company [Member] | Junior subordinated debt [Member] | Floating-rate notes [Member]
Debt Instrument [Line Items]
Maturity date(s) Start	Jan. 1, 2027
Maturity date(s) End	Dec. 31, 2027
Junior Subordinated Notes	$ 308	299
Wells Fargo & Company [Member] | Junior subordinated debt [Member] | Floating-rate notes [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest Rate, Stated Percentage	2.94%
Wells Fargo & Company [Member] | Junior subordinated debt [Member] | Floating-rate notes [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest Rate, Stated Percentage	3.44%
Wells Fargo & Company [Member] | Junior subordinated debt [Member] | Fixed-rate notes - Hybrid Trust Securities [Member]
Debt Instrument [Line Items]
Maturity date(s) Start	Jan. 1, 2029
Maturity date(s) End	Dec. 31, 2036
Junior Subordinated Notes	$ 1,308	1,369
Wells Fargo & Company [Member] | Junior subordinated debt [Member] | Fixed-rate notes - Hybrid Trust Securities [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest Rate, Stated Percentage	5.95%
Wells Fargo & Company [Member] | Junior subordinated debt [Member] | Fixed-rate notes - Hybrid Trust Securities [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest Rate, Stated Percentage	7.95%
Wells Fargo & Company [Member] | Long-term debt parent [Member]
Debt Instrument [Line Items]
Long-term debt	$ 135,224	$ 146,318

Long-term Debt, Annual Maturiti

Long-term Debt, Annual Maturities (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Maturities of Long-Term Debt [Line Items]
2,019	$ 46,547
2,020	33,604
2,021	39,635
2,022	18,080
2,023	18,812
Thereafter	72,366
Total	229,044	$ 225,020
Increase in Long-term Debt	4,000
Proceeds from issuance of long-term debt	47,595	43,575	$ 90,111
Wells Fargo Bank, National Association and other bank entities [Member]
Maturities of Long-Term Debt [Line Items]
2,019	38,737
2,020	20,145
2,021	20,792
2,022	308
2,023	3,969
Thereafter	7,448
Total	91,399	75,238
Wells Fargo Bank, National Association and other bank entities [Member] | Senior debt [Member]
Maturities of Long-Term Debt [Line Items]
2,019	36,653
2,020	18,498
2,021	20,218
2,022	40
2,023	2,807
Thereafter	179
Total	78,395
Wells Fargo Bank, National Association and other bank entities [Member] | Senior subordinated debt [Member]
Maturities of Long-Term Debt [Line Items]
2,019	0
2,020	0
2,021	0
2,022	0
2,023	1,043
Thereafter	4,156
Total	5,199
Wells Fargo Bank, National Association and other bank entities [Member] | Junior subordinated debt [Member]
Maturities of Long-Term Debt [Line Items]
2,019	0
2,020	0
2,021	0
2,022	0
2,023	0
Thereafter	352
Total	352
Wells Fargo Bank, National Association and other bank entities [Member] | Securitizations and other bank debt [Member]
Maturities of Long-Term Debt [Line Items]
2,019	2,084
2,020	1,647
2,021	574
2,022	268
2,023	119
Thereafter	2,761
Total	7,453
Other Consolidated Subsidiaries [Member]
Maturities of Long-Term Debt [Line Items]
2,019	1,097
2,020	0
2,021	920
2,022	0
2,023	367
Thereafter	37
Total	2,421	3,464
Other Consolidated Subsidiaries [Member] | Senior debt [Member]
Maturities of Long-Term Debt [Line Items]
2,019	1,097
2,020	0
2,021	920
2,022	0
2,023	367
Thereafter	5
Total	2,389
Other Consolidated Subsidiaries [Member] | Securitizations and other bank debt [Member]
Maturities of Long-Term Debt [Line Items]
2,019	0
2,020	0
2,021	0
2,022	0
2,023	0
Thereafter	32
Total	32
Parent Company [Member]
Maturities of Long-Term Debt [Line Items]
Total	135,079	146,130
Proceeds from issuance of long-term debt	1,876	22,217	$ 34,362
Parent Company [Member] | Senior debt [Member]
Maturities of Long-Term Debt [Line Items]
2,019	6,713
2,020	13,459
2,021	17,923
2,022	17,772
2,023	10,932
Thereafter	41,381
Total	108,180
Parent Company [Member] | Senior subordinated debt [Member]
Maturities of Long-Term Debt [Line Items]
2,019	0
2,020	0
2,021	0
2,022	0
2,023	3,544
Thereafter	21,884
Total	25,428
Parent Company [Member] | Junior subordinated debt [Member]
Maturities of Long-Term Debt [Line Items]
2,019	0
2,020	0
2,021	0
2,022	0
2,023	0
Thereafter	1,616
Total	1,616
Parent Company [Member] | Long-term debt parent [Member]
Maturities of Long-Term Debt [Line Items]
2,019	6,713
2,020	13,459
2,021	17,923
2,022	17,772
2,023	14,476
Thereafter	64,881
Total	$ 135,224	$ 146,318

Guarantees, Pledged Assets an_3

Guarantees, Pledged Assets and Collateral (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017
Guarantor Obligations [Line Items]
Carrying Value Obligation (asset)		$ (90)	$ (364)
Maximum exposure to loss, expires in one year or less		32,872	31,034
Maximum exposure to loss, expires in one year through three years		19,053	21,147
Maximum exposure to loss, expires in three years through five years		7,674	7,896
Maximum exposure to loss, expires after five years		15,063	16,052
Maximum exposure to loss		74,662	76,129
Maximum exposure to loss		$ 74,662	76,129
Percentage share of losses owed on loans and MHFS sold with recourse (up to 33.33%)		33.33%
Total assets	[1]	$ 1,895,883	1,951,757
Securities owned and pledged as collateral related to repurchase agreements not available to be repledged, Fair Value		4,400	5,200
Mortgages held for sale		7,400	2,600
Carrying value of delinquent loans eligible for repurchase		1,200	2,200
Security Owned and Pledged as Collateral, Fair Value [Abstract]
Trading equity securities		19,449	30,004
Total pledged asset held for trading		100,316	100,362
Total pledged assets		622,643	652,300
Non-investment grade [Member]
Guarantor Obligations [Line Items]
Maximum exposure to loss		39,591	36,692
Maximum exposure to loss		39,591	36,692
Direct pay letters of credit (DPLCs) [Member]
Guarantor Obligations [Line Items]
Maximum exposure to loss		7,500	8,100
Maximum exposure to loss		7,500	8,100
Third Party Clearing Indemnifications [Member]
Guarantor Obligations [Line Items]
Maximum exposure to loss		1,000	809
Third-party Clearing Customer Obligations		70	92
Collateral Provided to Third-party Clearing Agents		974	717
Maximum exposure to loss		1,000	809
Standby Letters of Credit [Member]
Guarantor Obligations [Line Items]
Carrying Value Obligation (asset)		40	39
Maximum exposure to loss, expires in one year or less		14,636	15,357
Maximum exposure to loss, expires in one year through three years		7,897	7,908
Maximum exposure to loss, expires in three years through five years		3,398	3,068
Maximum exposure to loss, expires after five years		497	645
Maximum exposure to loss		26,428	26,978
Maximum exposure to loss		26,428	26,978
Standby Letters of Credit [Member] | Non-investment grade [Member]
Guarantor Obligations [Line Items]
Maximum exposure to loss		8,027	8,773
Maximum exposure to loss		8,027	8,773
Securities lending and other indemnifications [Member]
Guarantor Obligations [Line Items]
Carrying Value Obligation (asset)		0	0
Maximum exposure to loss, expires in one year or less		0	0
Maximum exposure to loss, expires in one year through three years		1	0
Maximum exposure to loss, expires in three years through five years		0	2
Maximum exposure to loss, expires after five years		1,044	809
Maximum exposure to loss		1,045	811
Maximum exposure to loss		1,045	811
Securities lending and other indemnifications [Member] | Non-investment grade [Member]
Guarantor Obligations [Line Items]
Maximum exposure to loss		1	2
Maximum exposure to loss		1	2
Loans and MHFS sold with recourse [Member]
Guarantor Obligations [Line Items]
Carrying Value Obligation (asset)		54	51
Maximum exposure to loss, expires in one year or less		104	165
Maximum exposure to loss, expires in one year through three years		653	533
Maximum exposure to loss, expires in three years through five years		1,207	934
Maximum exposure to loss, expires after five years		10,163	9,385
Maximum exposure to loss		12,127	11,017
Maximum exposure to loss		12,127	11,017
Loans and MHFS sold with recourse [Member] | Non-investment grade [Member]
Guarantor Obligations [Line Items]
Maximum exposure to loss		9,079	8,155
Maximum exposure to loss		9,079	8,155
Factoring Guarantee [Member]
Guarantor Obligations [Line Items]
Carrying Value Obligation (asset)		0	0
Maximum exposure to loss, expires in one year or less		889	747
Maximum exposure to loss, expires in one year through three years		0	0
Maximum exposure to loss, expires in three years through five years		0	0
Maximum exposure to loss, expires after five years		0	0
Maximum exposure to loss		889	747
Maximum exposure to loss		889	747
Factoring Guarantee [Member] | Non-investment grade [Member]
Guarantor Obligations [Line Items]
Maximum exposure to loss		751	668
Maximum exposure to loss		751	668
Other guarantees [Member]
Guarantor Obligations [Line Items]
Carrying Value Obligation (asset)		1	1
Maximum exposure to loss, expires in one year or less		0	7
Maximum exposure to loss, expires in one year through three years		0	0
Maximum exposure to loss, expires in three years through five years		3	2
Maximum exposure to loss, expires after five years		2,959	4,175
Maximum exposure to loss		2,962	4,184
Maximum exposure to loss		2,962	4,184
Other guarantees [Member] | Non-investment grade [Member]
Guarantor Obligations [Line Items]
Maximum exposure to loss		1	7
Maximum exposure to loss		1	7
Written put options [Member]
Guarantor Obligations [Line Items]
Carrying Value Obligation (asset)		(185)	(455)
Maximum exposure to loss, expires in one year or less		17,243	14,758
Maximum exposure to loss, expires in one year through three years		10,502	12,706
Maximum exposure to loss, expires in three years through five years		3,066	3,890
Maximum exposure to loss, expires after five years		400	1,038
Maximum exposure to loss		31,211	32,392
Maximum exposure to loss		31,211	32,392
Written put options [Member] | Non-investment grade [Member]
Guarantor Obligations [Line Items]
Maximum exposure to loss		21,732	19,087
Maximum exposure to loss		21,732	19,087
Loans and MHFS sold with recourse [Member]
Guarantor Obligations [Line Items]
Loans repurchased		3	5
Trading assets and other [Member]
Guarantor Obligations [Line Items]
Securities owned and pledged as collateral available to be repledged, Fair Value		106,200	109,000
VIEs that we consolidate [Member]
Guarantor Obligations [Line Items]
Total assets		14,062	13,617
Secured Borrowing transactions excluded [Member]
Guarantor Obligations [Line Items]
Total assets		617	675
Collateral Pledged [Member]
Security Owned and Pledged as Collateral, Fair Value [Abstract]
Debt Securities, Trading		96,616	96,993
Trading equity securities		9,695	12,161
Total pledged asset held for trading		106,311	109,154
Collateral Pledged [Member] | Trading assets and other [Member]
Security Owned and Pledged as Collateral, Fair Value [Abstract]
Total pledged asset held for trading		45,500	41,900
Collateral Pledged [Member] | Other Trading - Off-Balance Sheet [Member]
Security Owned and Pledged as Collateral, Fair Value [Abstract]
Total pledged asset held for trading		60,800	67,300
Not Held for Trading [Member]
Security Owned and Pledged as Collateral, Fair Value [Abstract]
Debt securities and other, not held for trading		62,438	73,592
Mortgages held for sale and loans		453,894	469,554
Total pledged assets		516,332	543,146
Not Held for Trading [Member] | Investment securities [Member]
Guarantor Obligations [Line Items]
Securities owned and pledged as collateral available to be repledged, Fair Value		68	64
Securities owned and pledged as collateral related to repurchase agreements not available to be repledged, carrying value		4,200	5,000
Securities owned and pledged as collateral related to repurchase agreements not available to be repledged, Fair Value		$ 4,100	$ 5,000
[1]	(4)Our consolidated assets at December 31, 2018 and 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, $139 million and $116 million; Interest-bearing deposits with banks, $8 million and $371 million; Debt securities, $45 million and $0 million; Net loans, $13.6 billion and $12.5 billion; Derivative assets, $0 million and $0 million; Equity securities, $85 million and $306 million; Other assets, $221 million and $342 million; and Total assets, $14.1 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	Dec. 31, 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	$ 4,400	$ 5,200
Net amounts in consolidated balance sheet	97,404	97,947
Collateral received, fair value	123,100	130,800
Collateral received with the right to sell or repledge	123,100	130,800
Collateral sold or repledged	60,800	66,300
Collateral pledged, fair value	108,800	113,600
Resale and securities borrowing agreements
Gross amounts recognized	112,662	121,135
Gross amounts offset in consolidated balance sheet	(15,258)	(23,188)
Net amounts in consolidated balance sheet	97,404	97,947
Collateral not recognized in consolidated balance sheet	(96,734)	(96,829)
Net amount	670	1,118
Repurchase and securities lending agreements
Gross amounts recognized (5)	106,248	111,488
Gross amounts offset in consolidated balance sheet	(15,258)	(23,188)
Net amounts in consolidated balance sheet	90,990	88,300
Collateral pledged but not netted in consolidated balance sheet	(90,798)	(87,918)
Net amount	192	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	80,100	78,900
Resale and securities borrowing agreements
Net amounts in consolidated balance sheet	80,100	78,900
Loans [Member]
Financial Instruments Owned and Pledged as Collateral [Line Items]
Net amounts in consolidated balance sheet	17,300	19,000
Resale and securities borrowing agreements
Net amounts in consolidated balance sheet	$ 17,300	$ 19,000

Guarantees, Pledged Assets an_4

Guarantees, Pledged Assets and Collateral, and Other Commitments Guarantees, Collateral Type and Contractual Maturities of Repurchase Agreements and Securities Lending Agreements (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Secured Borrowings, Gross Including Not Subject to Master Netting Arrangement [Abstract]
Repurchase Agreements	$ 97,280	$ 99,753
Securities Lending	8,968	11,735
Total Repurchases and Securities Lending	106,248	111,488
Securities of U.S. Treasury and federal agencies [Member]
Secured Borrowings, Gross Including Not Subject to Master Netting Arrangement [Abstract]
Repurchase Agreements	38,408	40,507
Securities Lending	222	186
Securities of U.S. states and political subdivisions [Member]
Secured Borrowings, Gross Including Not Subject to Master Netting Arrangement [Abstract]
Repurchase Agreements	159	92
Federal agencies [Member]
Secured Borrowings, Gross Including Not Subject to Master Netting Arrangement [Abstract]
Repurchase Agreements	47,241	45,336
Securities Lending	2	0
Non-Agency Mortgage-backed Securities [Member]
Secured Borrowings, Gross Including Not Subject to Master Netting Arrangement [Abstract]
Repurchase Agreements	1,875	1,324
Corporate debt securities [Member]
Secured Borrowings, Gross Including Not Subject to Master Netting Arrangement [Abstract]
Repurchase Agreements	6,191	8,020
Securities Lending	389	619
Asset-backed securities [Member]
Secured Borrowings, Gross Including Not Subject to Master Netting Arrangement [Abstract]
Repurchase Agreements	2,074	2,034
Equity securities [Member]
Secured Borrowings, Gross Including Not Subject to Master Netting Arrangement [Abstract]
Repurchase Agreements	992	838
Securities Lending	8,349	10,930
Other [Member]
Secured Borrowings, Gross Including Not Subject to Master Netting Arrangement [Abstract]
Repurchase Agreements	340	1,602
Securities Lending	6	0
Overnight/Continuous [Member]
Secured Borrowings, Gross Including Not Subject to Master Netting Arrangement [Abstract]
Repurchase Agreements	86,574	83,780
Securities Lending	8,669	9,634
Total Repurchases and Securities Lending	95,243	93,414
Up to 30 days [Member]
Secured Borrowings, Gross Including Not Subject to Master Netting Arrangement [Abstract]
Repurchase Agreements	3,244	7,922
Securities Lending	0	584
Total Repurchases and Securities Lending	3,244	8,506
30-90 Days [Member]
Secured Borrowings, Gross Including Not Subject to Master Netting Arrangement [Abstract]
Repurchase Agreements	2,153	3,286
Securities Lending	299	1,363
Total Repurchases and Securities Lending	2,452	4,649
Over 90 days [Member]
Secured Borrowings, Gross Including Not Subject to Master Netting Arrangement [Abstract]
Repurchase Agreements	5,309	4,765
Securities Lending	0	154
Total Repurchases and Securities Lending	$ 5,309	$ 4,919

Guarantees, Pledged Assets an_5

Guarantees, Pledged Assets and Collateral, and Other Commitments Guarantees, Other Commitments (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017
Other Commitments [Line Items]
Resale Agreements, Funded Amounts Outstanding		$ 0	$ 0
Resale Agreements, Unfunded Commitments		$ 9,800	2,800
Description of Guarantees Given by Registrant		The Parent fully and unconditionally guarantees the payment of principal, interest, and any other amounts that may be due on securities that its 100% owned finance subsidiary, Wells Fargo Finance LLC, may issue.
Liabilities	[1]	$ 1,698,817	1,743,678
Other commitments and guarantees [Member] | Wells Fargo Finance, LLC [Member]
Other Commitments [Line Items]
Liabilities		5	0
Purchase Commitment [Member] | Debt securities [Member]
Other Commitments [Line Items]
Other Commitment		335	194
Purchase Commitment [Member] | Equity securities [Member]
Other Commitments [Line Items]
Other Commitment		$ 2,500	$ 2,200
[1]	$221 million and $342 million; and Total assets, $14.1 billion and $13.6 billion, respectively.(5)Our consolidated liabilities at December 31, 2018 and 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, $191 million and $132 million; Long-term debt, $816 million and $1.5 billion; and Total liabilities, $1.0 billion and $1.6 billion, respectively.

Legal Actions (Details)

Legal Actions (Details) $ in Millions

Nov. 30, 2016USD ($)

Jul. 13, 2012USD ($)

Dec. 31, 2018USD ($)legal_action

Nov. 30, 2018USD ($)

Oct. 31, 2018USD ($)

Aug. 31, 2018USD ($)

Apr. 20, 2017USD ($)

Nov. 01, 2018USD ($)

Oct. 24, 2018USD ($)

Apr. 20, 2018USD ($)

Jul. 31, 2017

Nov. 17, 2016legal_action

May 31, 2016

Dec. 31, 2015legal_action

Liability for Contingent Litigation Losses [Member]

Legal Actions (Textual) [Abstract]

Range of possible loss, portion not accrued

$ 2,700

ATM Access Fee Litigation [Member]

Loss Contingencies [Line Items]

Loss Contingency, Pending Claims, Number | legal_action

3

Automobile Lending Matters [Member]

Loss Contingencies [Line Items]

Loss Contingency, Pending Claims, Number | legal_action

1

Interchange Litigation [Member]

Loss Contingencies [Line Items]

Loss Contingency, Estimate of Possible Loss

$ 6,600

Legal Actions (Textual) [Abstract]

Distribution to class merchants (percent)

0.10%

Distribution period to class merchants

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 Bankruptcy Loan Modification Litigation [Member]

Loss Contingencies [Line Items]

Loss Contingency, Estimate of Possible Loss

$ 13.5

Mortgage interest rate lock related regulatory Investigation [Member]

Loss Contingencies [Line Items]

Loss Contingency, Pending Claims, Number | legal_action

2

Mortgage Related Regulatory Investigations [Member]

Legal Actions (Textual) [Abstract]

Loss Contingency Accrual, Payments

$ 17

$ 2,090

Retail Sales Practice Matters [Member]

Loss Contingencies [Line Items]

Unauthorized accounts identified

3,500,000

Legal Actions (Textual) [Abstract]

Amounts to be paid in connection with legal or regulatory matters

$ 142

Loss Contingency Accrual, Payments

$ 65

Gain Contingency, Estimate of Possible Insurance Carriers Payments

$ 240

RMBS Trustee Litigation [Member]

Loss Contingencies [Line Items]

Loss Contingency, Pending Claims, Number | legal_action

4

Loss Contingency, Estimate of Possible Loss

$ 43

RMBS Trustee Litigation Civil Complaint [Member]

Loss Contingencies [Line Items]

RMBS trusts at issue in the State Court Action

11

RMBS Trustee Punitive Class Action Complaint [Member]

Loss Contingencies [Line Items]

RMBS trusts at issue in the State Court Action

261

Seminole Tribe Trustee Litigation [Member]

Loss Contingencies [Line Items]

Loss Contingency, Pending Claims, Number | legal_action

1

Retail Sales Practices, CPI and GAP, and Mortgage interest rate lock matters [Member]

Loss Contingencies [Line Items]

Civil Money Penalty

$ 1,000

Legal Actions (Textual) [Abstract]

Loss Contingency Accrual, Payments

$ 575

All Class Members [Member] | Retail Sales Practice Matters [Member]

Legal Actions (Textual) [Abstract]

Amounts to be paid in connection with legal or regulatory matters

$ 25

Loss Contingency Accrual, Payments

$ 480

Derivatives, Notional or Contra

Derivatives, Notional or Contractual Amounts and Fair Values of Derivatives (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Fair value asset derivatives	$ 34,560	$ 36,355
Fair value asset derivatives, netting	(23,790)	(24,127)
Net amounts in consolidated balance sheet, asset	10,770	12,228
Fair value liability derivatives	32,047	34,298
Fair value liability derivatives, netting	(23,548)	(25,502)
Net amounts in consolidated balance sheet, liability	8,499	8,796
Interest rate contract [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Fair value asset derivatives, netting	(12,029)	(11,929)
Net amounts in consolidated balance sheet, asset	6,406	5,701
Fair value liability derivatives, netting	(13,152)	(13,226)
Net amounts in consolidated balance sheet, liability	3,156	2,246
Commodity contract [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Fair value asset derivatives, netting	(849)	(966)
Net amounts in consolidated balance sheet, asset	739	1,388
Fair value liability derivatives, netting	(727)	(648)
Net amounts in consolidated balance sheet, liability	1,609	687
Equity contract [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Fair value asset derivatives, netting	(5,318)	(4,233)
Net amounts in consolidated balance sheet, asset	2,227	2,774
Fair value liability derivatives, netting	(3,877)	(4,041)
Net amounts in consolidated balance sheet, liability	2,133	4,460
Foreign exchange contract [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Fair value asset derivatives, netting	(5,355)	(6,656)
Net amounts in consolidated balance sheet, asset	1,359	2,317
Fair value liability derivatives, netting	(5,522)	(7,189)
Net amounts in consolidated balance sheet, liability	1,591	1,379
Credit Contracts Protection Sold [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Fair value asset derivatives, netting	(73)	(145)
Net amounts in consolidated balance sheet, asset	3	2
Fair value liability derivatives, netting	(180)	(204)
Net amounts in consolidated balance sheet, liability	2	10
Credit Contracts Protection Purchased [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Fair value asset derivatives, netting	(166)	(198)
Net amounts in consolidated balance sheet, asset	36	46
Fair value liability derivatives, netting	(90)	(194)
Net amounts in consolidated balance sheet, liability	8	14
Designated as Hedging Instrument [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Fair value asset derivatives	2,810	3,974
Fair value liability derivatives	2,012	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	177,511	209,677
Fair value asset derivatives	2,237	2,492
Fair value liability derivatives	636	1,092
Designated as Hedging Instrument [Member] | Interest rate contract [Member] | Basis swap [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Notional or contractual amount	0	500
Designated as Hedging Instrument [Member] | Foreign exchange contract [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Notional or contractual amount	34,176	34,135
Fair value asset derivatives	573	1,482
Fair value liability derivatives	1,376	1,137
Designated as Hedging Instrument [Member] | Foreign exchange contract [Member] | Basis swap [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Notional or contractual amount	11,200	13,500
Not Designated as Hedging Instrument [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Fair value asset derivatives	31,750	32,381
Fair value liability derivatives	30,035	32,069
Economic hedges [Member] | Not Designated as Hedging Instrument [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Fair value asset derivatives	2,463	990
Fair value liability derivatives	528	648
Economic hedges [Member] | Not Designated as Hedging Instrument [Member] | Interest rate contract [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Notional or contractual amount	173,215	220,558
Fair value asset derivatives	849	159
Fair value liability derivatives	369	201
Economic hedges [Member] | Not Designated as Hedging Instrument [Member] | Equity contract [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Notional or contractual amount	13,920	12,315
Fair value asset derivatives	1,362	716
Fair value liability derivatives	79	138
Economic hedges [Member] | Not Designated as Hedging Instrument [Member] | Foreign exchange contract [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Notional or contractual amount	19,521	15,976
Fair value asset derivatives	225	78
Fair value liability derivatives	80	309
Economic hedges [Member] | Not Designated as Hedging Instrument [Member] | Credit Contracts Protection Purchased [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Notional or contractual amount	100	111
Fair value asset derivatives	27	37
Fair value liability derivatives	0	0
Customer accommodation, trading, and other derivatives [Member] | Not Designated as Hedging Instrument [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Fair value asset derivatives	29,287	31,391
Fair value liability derivatives	29,507	31,421
Customer accommodation, trading, and other derivatives [Member] | Not Designated as Hedging Instrument [Member] | Interest rate contract [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Notional or contractual amount	9,162,821	6,434,673
Fair value asset derivatives	15,349	14,979
Fair value liability derivatives	15,303	14,179
Customer accommodation, trading, and other derivatives [Member] | Not Designated as Hedging Instrument [Member] | Commodity contract [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Notional or contractual amount	66,173	62,530
Fair value asset derivatives	1,588	2,354
Fair value liability derivatives	2,336	1,335
Customer accommodation, trading, and other derivatives [Member] | Not Designated as Hedging Instrument [Member] | Equity contract [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Notional or contractual amount	217,890	213,750
Fair value asset derivatives	6,183	6,291
Fair value liability derivatives	5,931	8,363
Customer accommodation, trading, and other derivatives [Member] | Not Designated as Hedging Instrument [Member] | Foreign exchange contract [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Notional or contractual amount	364,982	362,896
Fair value asset derivatives	5,916	7,413
Fair value liability derivatives	5,657	7,122
Customer accommodation, trading, and other derivatives [Member] | Not Designated as Hedging Instrument [Member] | Credit Contracts Protection Sold [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Notional or contractual amount	11,741	9,021
Fair value asset derivatives	76	147
Fair value liability derivatives	182	214
Customer accommodation, trading, and other derivatives [Member] | Not Designated as Hedging Instrument [Member] | Credit Contracts Protection Purchased [Member]
Notional Or Contractual Amounts And Fair Values For Derivatives [Abstract]
Notional or contractual amount	20,880	17,406
Fair value asset derivatives	175	207
Fair value liability derivatives	$ 98	$ 208

Derivatives, Gross Fair Values

Derivatives, Gross Fair Values of Derivative Assets and Liabilities (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Derivative Assets
Gross amounts recognized	$ 34,560	$ 36,355
Gross amounts offset in consolidated balance sheet	(23,790)	(24,127)
Net amounts in consolidated balance sheet, asset	10,770	12,228
Gross amounts not offset in consolidated balance sheet (Disclosure-only netting)	(875)	(773)
Net amounts	9,895	11,455
Derivative Liabilities
Gross amounts recognized	32,047	34,298
Gross amounts offset in consolidated balance sheet	(23,548)	(25,502)
Net amounts in consolidated balance sheet, liability	8,499	8,796
Gross amounts not offset in consolidated balance sheet (Disclosure-only netting)	(875)	(1,692)
Net amounts	7,624	7,104
Derivatives (Textual) [Abstract]
Derivative assets subject to enforceable master netting arrangements	30,900	30,000
Derivative liabilities subject to enforceable master netting arrangements	28,400	29,900
Derivative assets not subject to enforceable master netting arrangements	3,700	6,400
Derivative liabilities not subject to enforceable master netting arrangements	3,600	4,400
Valuation adjustments for derivative assets	353	245
Valuation adjustments for derivative liabilities	152	95
Cash collateral netted against derivative assets	3,700	2,700
Cash collateral netted against derivative liabilities	3,600	4,200
Interest rate contract [Member]
Derivative Assets
Gross amounts recognized	18,435	17,630
Gross amounts offset in consolidated balance sheet	(12,029)	(11,929)
Net amounts in consolidated balance sheet, asset	6,406	5,701
Gross amounts not offset in consolidated balance sheet (Disclosure-only netting)	(80)	(145)
Net amounts	$ 6,326	$ 5,556
Percent exchanged in the over the counter market	90.00%	99.00%
Derivative Liabilities
Gross amounts recognized	$ 16,308	$ 15,472
Gross amounts offset in consolidated balance sheet	(13,152)	(13,226)
Net amounts in consolidated balance sheet, liability	3,156	2,246
Gross amounts not offset in consolidated balance sheet (Disclosure-only netting)	(567)	(1,078)
Net amounts	$ 2,589	$ 1,168
Percent exchanged in the over the counter market	92.00%	99.00%
Commodity contract [Member]
Derivative Assets
Gross amounts recognized	$ 1,588	$ 2,354
Gross amounts offset in consolidated balance sheet	(849)	(966)
Net amounts in consolidated balance sheet, asset	739	1,388
Gross amounts not offset in consolidated balance sheet (Disclosure-only netting)	(4)	(4)
Net amounts	$ 735	$ 1,384
Percent exchanged in the over the counter market	57.00%	88.00%
Derivative Liabilities
Gross amounts recognized	$ 2,336	$ 1,335
Gross amounts offset in consolidated balance sheet	(727)	(648)
Net amounts in consolidated balance sheet, liability	1,609	687
Gross amounts not offset in consolidated balance sheet (Disclosure-only netting)	(8)	(1)
Net amounts	$ 1,601	$ 686
Percent exchanged in the over the counter market	85.00%	76.00%
Equity contract [Member]
Derivative Assets
Gross amounts recognized	$ 7,545	$ 7,007
Gross amounts offset in consolidated balance sheet	(5,318)	(4,233)
Net amounts in consolidated balance sheet, asset	2,227	2,774
Gross amounts not offset in consolidated balance sheet (Disclosure-only netting)	(755)	(596)
Net amounts	$ 1,472	$ 2,178
Percent exchanged in the over the counter market	78.00%	76.00%
Derivative Liabilities
Gross amounts recognized	$ 6,010	$ 8,501
Gross amounts offset in consolidated balance sheet	(3,877)	(4,041)
Net amounts in consolidated balance sheet, liability	2,133	4,460
Gross amounts not offset in consolidated balance sheet (Disclosure-only netting)	(110)	(400)
Net amounts	$ 2,023	$ 4,060
Percent exchanged in the over the counter market	75.00%	85.00%
Foreign exchange contract [Member]
Derivative Assets
Gross amounts recognized	$ 6,714	$ 8,973
Gross amounts offset in consolidated balance sheet	(5,355)	(6,656)
Net amounts in consolidated balance sheet, asset	1,359	2,317
Gross amounts not offset in consolidated balance sheet (Disclosure-only netting)	(35)	(25)
Net amounts	$ 1,324	$ 2,292
Percent exchanged in the over the counter market	100.00%	100.00%
Derivative Liabilities
Gross amounts recognized	$ 7,113	$ 8,568
Gross amounts offset in consolidated balance sheet	(5,522)	(7,189)
Net amounts in consolidated balance sheet, liability	1,591	1,379
Gross amounts not offset in consolidated balance sheet (Disclosure-only netting)	(188)	(204)
Net amounts	$ 1,403	$ 1,175
Percent exchanged in the over the counter market	100.00%	100.00%
Credit Contracts Protection Sold [Member]
Derivative Assets
Gross amounts recognized	$ 76	$ 147
Gross amounts offset in consolidated balance sheet	(73)	(145)
Net amounts in consolidated balance sheet, asset	3	2
Gross amounts not offset in consolidated balance sheet (Disclosure-only netting)	0	0
Net amounts	$ 3	$ 2
Percent exchanged in the over the counter market	12.00%	10.00%
Derivative Liabilities
Gross amounts recognized	$ 182	$ 214
Gross amounts offset in consolidated balance sheet	(180)	(204)
Net amounts in consolidated balance sheet, liability	2	10
Gross amounts not offset in consolidated balance sheet (Disclosure-only netting)	(2)	(9)
Net amounts	$ 0	$ 1
Percent exchanged in the over the counter market	67.00%	85.00%
Credit Contracts Protection Purchased [Member]
Derivative Assets
Gross amounts recognized	$ 202	$ 244
Gross amounts offset in consolidated balance sheet	(166)	(198)
Net amounts in consolidated balance sheet, asset	36	46
Gross amounts not offset in consolidated balance sheet (Disclosure-only netting)	(1)	(3)
Net amounts	$ 35	$ 43
Percent exchanged in the over the counter market	78.00%	89.00%
Derivative Liabilities
Gross amounts recognized	$ 98	$ 208
Gross amounts offset in consolidated balance sheet	(90)	(194)
Net amounts in consolidated balance sheet, liability	8	14
Gross amounts not offset in consolidated balance sheet (Disclosure-only netting)	0	0
Net amounts	$ 8	$ 14
Percent exchanged in the over the counter market	11.00%	9.00%

Derivatives, Derivatives in Fai

Derivatives, Derivatives in Fair Value and Cash Flow Hedging Relationships (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017		Dec. 31, 2016
Line Items Presented in the Consolidated Statement of Income [Abstract]
Debt securities (1)	$ 14,406	$ 12,946	[1]	$ 11,244	[1]
Loans	43,974	41,388		39,505
Mortgage loans held for sale	777	786		784
Deposits	(5,622)	(3,013)		(1,395)
Long-term debt	(6,703)	(5,157)		(3,830)
Other	2,473	1,603		1,289
Total amounts of line items presented in the consolidated statement of income	49,305	48,553		47,597
Gains (losses) on cash flow hedging relationships
Realized gains (losses) (pre tax) reclassified from cumulative OCI into net income	(294)	543		1,029
Derivatives (Textual) [Abstract]
Deferred net gains (losses) on derivatives in other comprehensive income	$ (293)
Maximum length of time hedged in cash flow hedge	8 years
Time value component recognized as net interest income (expense) on forward derivatives excluded from the assessment of hedge effectiveness	$ (2)	(3)		(13)
Fair Value Hedging [Member]
Gains (losses) on fair value hedging relationships
Net income (expense) recognized on fair value hedges	(496)	880		1,338
Cash Flow Hedging [Member]
Gains (losses) on cash flow hedging relationships
Realized gains (losses) (pre tax) reclassified from cumulative OCI into net income	(294)	543		1,029
Net income (expense) recognized on cash flow hedges	(294)	543		1,028
Interest contracts [Member] | Fair Value Hedging [Member]
Gains (losses) on fair value hedging relationships
Amounts related to interest settlements on derivatives	61	847		1,304
Recognized on derivatives	(1,035)	(979)		(2,175)
Recognized on hedged items	910	917		2,157
Interest contracts [Member] | Cash Flow Hedging [Member]
Gains (losses) on cash flow hedging relationships
Realized gains (losses) (pre tax) reclassified from cumulative OCI into net income	(291)	543		1,029
Gains (losses) (pre tax) recognized in income for hedge ineffectiveness				(1)
Foreign exchange contract [Member] | Fair Value Hedging [Member]
Gains (losses) on fair value hedging relationships
Amounts related to interest settlements on derivatives	(401)	(196)		40
Recognized on derivatives	(1,062)	2,901		(274)
Recognized on hedged items	1,031	(2,610)		286
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	(3)	0		0
Debt securities [Member] | Fair Value Hedging [Member]
Gains (losses) on fair value hedging relationships
Net income (expense) recognized on fair value hedges	(180)	(547)		(573)
Debt securities [Member] | Cash Flow Hedging [Member]
Gains (losses) on cash flow hedging relationships
Net income (expense) recognized on cash flow hedges	0	0		0
Debt securities [Member] | Interest contracts [Member] | Fair Value Hedging [Member]
Gains (losses) on fair value hedging relationships
Amounts related to interest settlements on derivatives	(187)	(469)		(582)
Recognized on derivatives	845	(43)		0
Recognized on hedged items	(877)	(52)		0
Debt securities [Member] | Interest contracts [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
Gains (losses) (pre tax) recognized in income for hedge ineffectiveness				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	33	14		9
Recognized on derivatives	7	13		0
Recognized on hedged items	(1)	(10)		0
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
Loans [Member] | Fair Value Hedging [Member]
Gains (losses) on fair value hedging relationships
Net income (expense) recognized on fair value hedges	0	(1)		0
Loans [Member] | Cash Flow Hedging [Member]
Gains (losses) on cash flow hedging relationships
Net income (expense) recognized on cash flow hedges	(292)	551		1,043
Loans [Member] | Interest contracts [Member] | Fair Value Hedging [Member]
Gains (losses) on fair value hedging relationships
Amounts related to interest settlements on derivatives	0	(1)		0
Recognized on derivatives	1	1		0
Recognized on hedged items	(1)	(1)		0
Loans [Member] | Interest contracts [Member] | Cash Flow Hedging [Member]
Gains (losses) on cash flow hedging relationships
Realized gains (losses) (pre tax) reclassified from cumulative OCI into net income	(292)	551		1,043
Gains (losses) (pre tax) recognized in income for hedge ineffectiveness				0
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
Recognized on derivatives	0	0		0
Recognized on hedged items	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
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	(10)	(14)		(6)
Mortgage loans held for sale [Member] | Cash Flow Hedging [Member]
Gains (losses) on cash flow hedging relationships
Net income (expense) recognized on cash flow hedges	0	0		0
Mortgage loans held for sale [Member] | Interest contracts [Member] | Fair Value Hedging [Member]
Gains (losses) on fair value hedging relationships
Amounts related to interest settlements on derivatives	(3)	(5)		(6)
Recognized on derivatives	15	(5)		0
Recognized on hedged items	(22)	(4)		0
Mortgage loans held for sale [Member] | Interest contracts [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
Gains (losses) (pre tax) recognized in income for hedge ineffectiveness				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
Recognized on derivatives	0	0		0
Recognized on hedged items	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
Deposits [Member] | Fair Value Hedging [Member]
Gains (losses) on fair value hedging relationships
Net income (expense) recognized on fair value hedges	(47)	52		62
Deposits [Member] | Cash Flow Hedging [Member]
Gains (losses) on cash flow hedging relationships
Net income (expense) recognized on cash flow hedges	0	0		0
Deposits [Member] | Interest contracts [Member] | Fair Value Hedging [Member]
Gains (losses) on fair value hedging relationships
Amounts related to interest settlements on derivatives	(41)	36		62
Recognized on derivatives	27	(20)		0
Recognized on hedged items	(33)	36		0
Deposits [Member] | Interest contracts [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
Gains (losses) (pre tax) recognized in income for hedge ineffectiveness				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
Recognized on derivatives	0	0		0
Recognized on hedged items	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
Long-term debt [Member] | Fair Value Hedging [Member]
Gains (losses) on fair value hedging relationships
Net income (expense) recognized on fair value hedges	(169)	1,127		1,861
Long-term debt [Member] | Cash Flow Hedging [Member]
Gains (losses) on cash flow hedging relationships
Net income (expense) recognized on cash flow hedges	(2)	(8)		(14)
Long-term debt [Member] | Interest contracts [Member] | Fair Value Hedging [Member]
Gains (losses) on fair value hedging relationships
Amounts related to interest settlements on derivatives	292	1,286		1,830
Recognized on derivatives	(1,923)	(912)		0
Recognized on hedged items	1,843	938		0
Long-term debt [Member] | Interest contracts [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	(8)		(14)
Gains (losses) (pre tax) recognized in income for hedge ineffectiveness				0
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	(434)	(210)		31
Recognized on derivatives	135	(230)		0
Recognized on hedged items	(82)	255		0
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	(3)	0		0
Other noninterest income [Member] | Fair Value Hedging [Member]
Gains (losses) on fair value hedging relationships
Net income (expense) recognized on fair value hedges	(90)	263		(6)
Other noninterest income [Member] | Cash Flow Hedging [Member]
Gains (losses) on cash flow hedging relationships
Net income (expense) recognized on cash flow hedges	0	0		(1)
Other noninterest income [Member] | Interest contracts [Member] | Fair Value Hedging [Member]
Gains (losses) on fair value hedging relationships
Amounts related to interest settlements on derivatives	0	0		0
Recognized on derivatives	0	0		(2,175)
Recognized on hedged items	0	0		2,157
Other noninterest income [Member] | Interest contracts [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
Gains (losses) (pre tax) recognized in income for hedge ineffectiveness				(1)
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
Recognized on derivatives	(1,204)	3,118		(274)
Recognized on hedged items	1,114	(2,855)		286
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
[1]	(1)Financial information for the prior periods has been revised to reflect presentation changes made in connection with our 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.

Derivatives, Fair Value Hedging

Derivatives, Fair Value Hedging Basis Adjustment (Details) - Fair Value Hedging [Member] - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Hedged Items Currently Designated [Member] | Debt securities [Member]
Fair Value Hedging Basis Adjustment [Abstract]
Carrying Amount of Assets	$ 37,857	$ 32,498
Hedged Asset, Fair Value Hedge, Cumulative Basis Adjustments	(157)	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	448	465
Hedged Asset, Fair Value Hedge, Cumulative Basis Adjustments	7	(1)
Hedged Items Currently Designated [Member] | Deposits [Member]
Fair Value Hedging Basis Adjustment [Abstract]
Carrying Amount of Liabilities	(56,535)	(23,679)
Hedged Liability, Fair Value Hedge, Cumulative Basis Adjustments	115	158
Hedged Items Currently Designated [Member] | Long-term debt [Member]
Fair Value Hedging Basis Adjustment [Abstract]
Carrying Amount of Liabilities	(104,341)	(128,950)
Hedged Liability, Fair Value Hedge, Cumulative Basis Adjustments	(742)	(2,154)
Hedged Items No Longer Designated [Member] | Debt securities [Member]
Fair Value Hedging Basis Adjustment [Abstract]
Carrying Amount of Assets	4,938	5,221
Hedged Asset, Discontinued Fair Value Hedge, Cumulative Basis Adjustments	238	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	(25,539)	(1,953)
Hedged Liability, Discontinued Fair Value Hedge, Cumulative Basis Adjustments	366	16
Foreign exchange contract [Member] | Hedged Items Currently Designated [Member] | Debt securities [Member]
Fair Value Hedging Basis Adjustment [Abstract]
Carrying Amount of Assets	1,600	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	(6,300)	(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	1,400	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	$ 66	$ 297

Derivatives, Derivatives Not De

Derivatives, Derivatives Not Designated as Hedging Instruments (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Derivatives (Textual) [Abstract]
Gains (losses) on derivatives used to hedge residential mortgage servicing rights	$ (1,072)	$ 413	$ 261
Not Designated as Hedging Instrument [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Gain (loss) on derivatives not designated as hedging instruments	4,947	(4,376)	2,696
Derivatives (Textual) [Abstract]
Gains (losses) on derivatives used to hedge residential mortgage servicing rights	(1,100)	413	261
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]
Gain (loss) on derivatives not designated as hedging instruments	(567)	1,062	1,847
Not Designated as Hedging Instrument [Member] | Net gain (loss) from equity investments [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Gain (loss) on derivatives not designated as hedging instruments	(408)	(1,483)	125
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]
Gain (loss) on derivatives not designated as hedging instruments	5,667	(3,037)	(189)
Not Designated as Hedging Instrument [Member] | Other [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Gain (loss) on derivatives not designated as hedging instruments	255	(918)	913
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]
Gain (loss) on derivatives not designated as hedging instruments	35	(1,954)	2,067
Derivatives (Textual) [Abstract]
Derivative Instruments Not Designated as Hedging Instruments, Gain	9
Derivative Instruments Not Designated as Hedging Instruments, Loss		(71)	(8)
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]
Gain (loss) on derivatives not designated as hedging instruments	(230)	373	978
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]
Gain (loss) on derivatives not designated as hedging instruments	(404)	(1,466)	114
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]
Gain (loss) on derivatives not designated as hedging instruments	669	(866)	954
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]
Gain (loss) on derivatives not designated as hedging instruments	0	5	21
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]
Gain (loss) on derivatives not designated as hedging instruments	(215)	448	1,029
Derivatives (Textual) [Abstract]
Aggregate fair value of derivatives used for economic hedges net asset (liability)	757	89
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]
Gain (loss) on derivatives not designated as hedging instruments	(215)	448	1,029
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]
Gain (loss) on derivatives not designated as hedging instruments	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]
Gain (loss) on derivatives not designated as hedging instruments	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]
Gain (loss) on derivatives not designated as hedging instruments	0	0	0
Not Designated as Hedging Instrument [Member] | Economic hedges [Member] | Net gain (loss) from equity investments [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Gain (loss) on derivatives not designated as hedging instruments	(408)	(1,483)	125
Not Designated as Hedging Instrument [Member] | Economic hedges [Member] | Net gain (loss) from equity investments [Member] | Interest contracts [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Gain (loss) on derivatives not designated as hedging instruments	0	0	0
Not Designated as Hedging Instrument [Member] | Economic hedges [Member] | Net gain (loss) from equity investments [Member] | Equity contract [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Gain (loss) on derivatives not designated as hedging instruments	(408)	(1,483)	125
Not Designated as Hedging Instrument [Member] | Economic hedges [Member] | Net gain (loss) from equity investments [Member] | Foreign exchange contract [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Gain (loss) on derivatives not designated as hedging instruments	0	0	0
Not Designated as Hedging Instrument [Member] | Economic hedges [Member] | Net gain (loss) from equity investments [Member] | Credit contract [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Gain (loss) on derivatives not designated as hedging instruments	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]
Gain (loss) on derivatives not designated as hedging instruments	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]
Gain (loss) on derivatives not designated as hedging instruments	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]
Gain (loss) on derivatives not designated as hedging instruments	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]
Gain (loss) on derivatives not designated as hedging instruments	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]
Gain (loss) on derivatives not designated as hedging instruments	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]
Gain (loss) on derivatives not designated as hedging instruments	658	(919)	913
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]
Gain (loss) on derivatives not designated as hedging instruments	(15)	(75)	(51)
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]
Gain (loss) on derivatives not designated as hedging instruments	4	17	(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]
Gain (loss) on derivatives not designated as hedging instruments	669	(866)	954
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]
Gain (loss) on derivatives not designated as hedging instruments	0	5	21
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]
Gain (loss) on derivatives not designated as hedging instruments	4,912	(2,422)	629
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]
Gain (loss) on derivatives not designated as hedging instruments	94	774	1,073
Derivatives (Textual) [Abstract]
Aggregate fair value of derivative loan commitments net asset (liability)	60	17
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]
Gain (loss) on derivatives not designated as hedging instruments	4,096	(3,931)	(1,643)
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]
Gain (loss) on derivatives not designated as hedging instruments	638	638	1,077
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]
Gain (loss) on derivatives not designated as hedging instruments	1	(81)	(105)
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]
Gain (loss) on derivatives not designated as hedging instruments	83	178	216
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]
Gain (loss) on derivatives not designated as hedging instruments	0	0	11
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]
Gain (loss) on derivatives not designated as hedging instruments	(352)	614	818
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]
Gain (loss) on derivatives not designated as hedging instruments	(352)	614	818
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]
Gain (loss) on derivatives not designated as hedging instruments	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]
Gain (loss) on derivatives not designated as hedging instruments	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]
Gain (loss) on derivatives not designated as hedging instruments	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]
Gain (loss) on derivatives not designated as hedging instruments	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]
Gain (loss) on derivatives not designated as hedging instruments	0	0	0
Not Designated as Hedging Instrument [Member] | Customer accommodation, trading, and other derivatives [Member] | Net gain (loss) from equity investments [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Gain (loss) on derivatives not designated as hedging instruments	0	0	0
Not Designated as Hedging Instrument [Member] | Customer accommodation, trading, and other derivatives [Member] | Net gain (loss) from equity investments [Member] | Interest contracts [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Gain (loss) on derivatives not designated as hedging instruments	0	0	0
Not Designated as Hedging Instrument [Member] | Customer accommodation, trading, and other derivatives [Member] | Net gain (loss) from equity investments [Member] | Equity contract [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Gain (loss) on derivatives not designated as hedging instruments	0	0	0
Not Designated as Hedging Instrument [Member] | Customer accommodation, trading, and other derivatives [Member] | Net gain (loss) from equity investments [Member] | Foreign exchange contract [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Gain (loss) on derivatives not designated as hedging instruments	0	0	0
Not Designated as Hedging Instrument [Member] | Customer accommodation, trading, and other derivatives [Member] | Net gain (loss) from equity investments [Member] | Credit contract [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Gain (loss) on derivatives not designated as hedging instruments	0	0	0
Not Designated as Hedging Instrument [Member] | Customer accommodation, trading, and other derivatives [Member] | Net gain (loss) from equity investments [Member] | Commodity contract [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Gain (loss) on derivatives not designated as hedging instruments	0	0	0
Not Designated as Hedging Instrument [Member] | Customer accommodation, trading, and other derivatives [Member] | Net gain (loss) from equity investments [Member] | Other contract [Member]
Net Gains Losses Recognized In Income Statement Related To Derivatives Not Designated As Hedging Instruments [Abstract]
Gain (loss) on derivatives not designated as hedging instruments	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]
Gain (loss) on derivatives not designated as hedging instruments	5,667	(3,037)	(189)
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]
Gain (loss) on derivatives not designated as hedging instruments	446	160	255
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]
Gain (loss) on derivatives not designated as hedging instruments	4,499	(3,932)	(1,643)
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]
Gain (loss) on derivatives not designated as hedging instruments	638	638	1,077
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]
Gain (loss) on derivatives not designated as hedging instruments	1	(81)	(105)
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]
Gain (loss) on derivatives not designated as hedging instruments	83	178	216
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]
Gain (loss) on derivatives not designated as hedging instruments	0	0	11
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]
Gain (loss) on derivatives not designated as hedging instruments	(403)	1	0
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]
Gain (loss) on derivatives not designated as hedging instruments	0	0	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]
Gain (loss) on derivatives not designated as hedging instruments	(403)	1	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]
Gain (loss) on derivatives not designated as hedging instruments	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]
Gain (loss) on derivatives not designated as hedging instruments	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]
Gain (loss) on derivatives not designated as hedging instruments	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]
Gain (loss) on derivatives not designated as hedging instruments	$ 0	$ 0	$ 0

Derivatives, Sold and Purchased

Derivatives, Sold and Purchased Credit Derivatives (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Details of Sold and Purchased Credit Derivatives [Abstract]
Fair value liability	$ 182	$ 214
Notional amount Protection sold	11,741	9,021
Notional amount Protection purchased with identical underlyings	3,898	2,558
Notional Net protection sold	7,843	6,463
Notional Other protection purchased	17,082	14,959
Non-investment grade [Member]
Details of Sold and Purchased Credit Derivatives [Abstract]
Notional amount Protection sold	6,629	4,608
Corporate bonds [Member]
Details of Sold and Purchased Credit Derivatives [Abstract]
Fair value liability	59	35
Notional amount Protection sold	2,037	2,007
Notional amount Protection purchased with identical underlyings	1,374	1,575
Notional Net protection sold	663	432
Notional Other protection purchased	$ 1,460	$ 946
Corporate bonds [Member] | Minimum [Member]
Details of Sold and Purchased Credit Derivatives [Abstract]
Derivative range of maturity dates	Jan. 1, 2019	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	$ 441	$ 510
Structured products [Member]
Details of Sold and Purchased Credit Derivatives [Abstract]
Fair value liability	62	86
Notional amount Protection sold	133	267
Notional amount Protection purchased with identical underlyings	121	232
Notional Net protection sold	12	35
Notional Other protection purchased	$ 113	$ 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	$ 128	$ 252
Credit default swap [Member]
Details of Sold and Purchased Credit Derivatives [Abstract]
Fair value liability	1	0
Notional amount Protection sold	3,618	2,626
Notional amount Protection purchased with identical underlyings	1,998	308
Notional Net protection sold	1,620	2,318
Notional Other protection purchased	$ 2,896	$ 3,932
Credit default swap [Member] | Minimum [Member]
Details of Sold and Purchased Credit Derivatives [Abstract]
Derivative range of maturity dates	Jan. 1, 2019	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	$ 582	$ 540
Commercial [Member]
Details of Sold and Purchased Credit Derivatives [Abstract]
Fair value liability	49	83
Notional amount Protection sold	389	423
Notional amount Protection purchased with identical underlyings	363	401
Notional Net protection sold	26	22
Notional Other protection purchased	$ 51	$ 87
Commercial [Member] | Minimum [Member]
Details of Sold and Purchased Credit Derivatives [Abstract]
Derivative range of maturity dates	Jan. 1, 2047	Jan. 1, 2047
Commercial [Member] | Maximum [Member]
Details of Sold and Purchased Credit Derivatives [Abstract]
Derivative range of maturity dates	Dec. 31, 2058	Dec. 31, 2058
Commercial [Member] | Non-investment grade [Member]
Details of Sold and Purchased Credit Derivatives [Abstract]
Notional amount Protection sold	$ 109	$ 0
Asset-backed securities [Member]
Details of Sold and Purchased Credit Derivatives [Abstract]
Fair value liability	9	9
Notional amount Protection sold	42	42
Notional amount Protection purchased with identical underlyings	42	42
Notional Net protection sold	0	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	$ 42	$ 0
Other credit derivatives [Member]
Details of Sold and Purchased Credit Derivatives [Abstract]
Fair value liability	2	1
Notional amount Protection sold	5,522	3,656
Notional amount Protection purchased with identical underlyings	0	0
Notional Net protection sold	5,522	3,656
Notional Other protection purchased	$ 12,561	$ 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, 2048	Dec. 31, 2031
Other credit derivatives [Member] | Non-investment grade [Member]
Details of Sold and Purchased Credit Derivatives [Abstract]
Notional amount Protection sold	$ 5,327	$ 3,306

Derivatives Derivatives, Credit

Derivatives Derivatives, Credit-Risk Contingent Feature Textuals (Details) - USD ($) $ in Billions	Dec. 31, 2018	Dec. 31, 2017
Derivatives [Abstract]
Aggregate fair value of derivative instruments with credit-risk-related contingent features, net liability	$ 7.4	$ 8.3
Collateral for derivative instruments with credit-risk-related contingent features	5.6	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	Dec. 31, 2018	Dec. 31, 2017
Financial assets
Trading debt securities	$ 69,989	$ 57,624	[1]
Available-for-sale, at fair value (2)	269,912	276,407	[1]
Marketable equity securities	29,556	39,227	[1]
Equity securities	55,148	62,497	[1]
Derivative asset	34,560	36,355
Financial liabilities
Derivative liabilities	(32,047)	(34,298)
Securities of U.S. Treasury and federal agencies [Member]
Financial assets
Available-for-sale, at fair value (2)	13,348	6,319
Securities of U.S. states and political subdivisions [Member]
Financial assets
Available-for-sale, at fair value (2)	49,264	51,326
Mortgage-backed securities [Member]
Financial assets
Available-for-sale, at fair value (2)	160,203	169,392
Other debt securities [Member]
Financial assets
Available-for-sale, at fair value (2)	5,483	5,648
Nonmarketable equity securities [Member]
Financial assets
Nonmarketable equity securities	5,455	4,867
Brokers [Member] | Fair Value, Inputs, Level 1 [Member]
Financial assets
Derivative asset	0	0
Financial liabilities
Derivative liabilities	0	0
Other liabilities	0	0
Brokers [Member] | Fair Value, Inputs, Level 1 [Member] | Debt securities [Member]
Financial assets
Trading debt securities	0	0
Available-for-sale, at fair value (2)	0	0
Brokers [Member] | Fair Value, Inputs, Level 1 [Member] | Securities of U.S. Treasury and federal agencies [Member]
Financial assets
Available-for-sale, at fair value (2)	0	0
Brokers [Member] | Fair Value, Inputs, Level 1 [Member] | Securities of U.S. states and political subdivisions [Member]
Financial assets
Available-for-sale, at fair value (2)	0	0
Brokers [Member] | Fair Value, Inputs, Level 1 [Member] | Mortgage-backed securities [Member]
Financial assets
Available-for-sale, at fair value (2)	0	0
Brokers [Member] | Fair Value, Inputs, Level 1 [Member] | Other debt securities [Member]
Financial assets
Available-for-sale, at fair value (2)	0	0
Brokers [Member] | Fair Value, Inputs, Level 1 [Member] | Equity securities [Member]
Financial assets
Equity securities	0	0
Brokers [Member] | Fair Value, Inputs, Level 1 [Member] | Marketable equity securities [Member]
Financial assets
Marketable equity securities	0	0
Brokers [Member] | Fair Value, Inputs, Level 1 [Member] | Nonmarketable equity securities [Member]
Financial assets
Nonmarketable equity securities	0	0
Brokers [Member] | Fair Value, Inputs, Level 2 [Member]
Financial assets
Derivative asset	0	0
Financial liabilities
Derivative liabilities	0	0
Other liabilities	0	0
Brokers [Member] | Fair Value, Inputs, Level 2 [Member] | Debt securities [Member]
Financial assets
Trading debt securities	0	0
Available-for-sale, at fair value (2)	45	340
Brokers [Member] | Fair Value, Inputs, Level 2 [Member] | Securities of U.S. Treasury and federal agencies [Member]
Financial assets
Available-for-sale, at fair value (2)	0	0
Brokers [Member] | Fair Value, Inputs, Level 2 [Member] | Securities of U.S. states and political subdivisions [Member]
Financial assets
Available-for-sale, at fair value (2)	0	0
Brokers [Member] | Fair Value, Inputs, Level 2 [Member] | Mortgage-backed securities [Member]
Financial assets
Available-for-sale, at fair value (2)	0	33
Brokers [Member] | Fair Value, Inputs, Level 2 [Member] | Other debt securities [Member]
Financial assets
Available-for-sale, at fair value (2)	45	307
Brokers [Member] | Fair Value, Inputs, Level 2 [Member] | Equity securities [Member]
Financial assets
Equity securities	0	0
Brokers [Member] | Fair Value, Inputs, Level 2 [Member] | Marketable equity securities [Member]
Financial assets
Marketable equity securities	0	0
Brokers [Member] | Fair Value, Inputs, Level 2 [Member] | Nonmarketable equity securities [Member]
Financial assets
Nonmarketable equity securities	0	0
Brokers [Member] | Fair Value, Inputs, Level 3 [Member]
Financial assets
Derivative asset	0	0
Financial liabilities
Derivative liabilities	0	0
Other liabilities	0	0
Brokers [Member] | Fair Value, Inputs, Level 3 [Member] | Debt securities [Member]
Financial assets
Trading debt securities	0	0
Available-for-sale, at fair value (2)	129	1,158
Brokers [Member] | Fair Value, Inputs, Level 3 [Member] | Securities of U.S. Treasury and federal agencies [Member]
Financial assets
Available-for-sale, at fair value (2)	0	0
Brokers [Member] | Fair Value, Inputs, Level 3 [Member] | Securities of U.S. states and political subdivisions [Member]
Financial assets
Available-for-sale, at fair value (2)	0	0
Brokers [Member] | Fair Value, Inputs, Level 3 [Member] | Mortgage-backed securities [Member]
Financial assets
Available-for-sale, at fair value (2)	0	0
Brokers [Member] | Fair Value, Inputs, Level 3 [Member] | Other debt securities [Member]
Financial assets
Available-for-sale, at fair value (2)	129	1,158
Brokers [Member] | Fair Value, Inputs, Level 3 [Member] | Equity securities [Member]
Financial assets
Equity securities	0	0
Brokers [Member] | Fair Value, Inputs, Level 3 [Member] | Marketable equity securities [Member]
Financial assets
Marketable equity securities	0	0
Brokers [Member] | Fair Value, Inputs, Level 3 [Member] | Nonmarketable equity securities [Member]
Financial assets
Nonmarketable equity securities	0	0
Third-party pricing services [Member] | Fair Value, Inputs, Level 1 [Member]
Financial assets
Derivative asset	17	19
Financial liabilities
Derivative liabilities	(12)	(19)
Other liabilities	0	0
Third-party pricing services [Member] | Fair Value, Inputs, Level 1 [Member] | Debt securities [Member]
Financial assets
Trading debt securities	899	926
Available-for-sale, at fair value (2)	10,399	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, at fair value (2)	10,399	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, at fair value (2)	0	0
Third-party pricing services [Member] | Fair Value, Inputs, Level 1 [Member] | Mortgage-backed securities [Member]
Financial assets
Available-for-sale, at fair value (2)	0	0
Third-party pricing services [Member] | Fair Value, Inputs, Level 1 [Member] | Other debt securities [Member]
Financial assets
Available-for-sale, at fair value (2)	0	0
Third-party pricing services [Member] | Fair Value, Inputs, Level 1 [Member] | Equity securities [Member]
Financial assets
Equity securities	0	0
Third-party pricing services [Member] | Fair Value, Inputs, Level 1 [Member] | Marketable equity securities [Member]
Financial assets
Marketable equity securities	0	0
Third-party pricing services [Member] | Fair Value, Inputs, Level 1 [Member] | Nonmarketable equity securities [Member]
Financial assets
Nonmarketable equity securities	0	0
Third-party pricing services [Member] | Fair Value, Inputs, Level 2 [Member]
Financial assets
Derivative asset	0	0
Financial liabilities
Derivative liabilities	0	0
Other liabilities	0	0
Third-party pricing services [Member] | Fair Value, Inputs, Level 2 [Member] | Debt securities [Member]
Financial assets
Trading debt securities	256	215
Available-for-sale, at fair value (2)	255,780	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, at fair value (2)	2,949	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, at fair value (2)	48,377	50,401
Third-party pricing services [Member] | Fair Value, Inputs, Level 2 [Member] | Mortgage-backed securities [Member]
Financial assets
Available-for-sale, at fair value (2)	160,162	168,948
Third-party pricing services [Member] | Fair Value, Inputs, Level 2 [Member] | Other debt securities [Member]
Financial assets
Available-for-sale, at fair value (2)	44,292	44,465
Third-party pricing services [Member] | Fair Value, Inputs, Level 2 [Member] | Equity securities [Member]
Financial assets
Equity securities	159	227
Third-party pricing services [Member] | Fair Value, Inputs, Level 2 [Member] | Marketable equity securities [Member]
Financial assets
Marketable equity securities	158	227
Third-party pricing services [Member] | Fair Value, Inputs, Level 2 [Member] | Nonmarketable equity securities [Member]
Financial assets
Nonmarketable equity securities	1	0
Third-party pricing services [Member] | Fair Value, Inputs, Level 3 [Member]
Financial assets
Derivative asset	0	0
Financial liabilities
Derivative liabilities	0	0
Other liabilities	0	0
Third-party pricing services [Member] | Fair Value, Inputs, Level 3 [Member] | Debt securities [Member]
Financial assets
Trading debt securities	0	0
Available-for-sale, at fair value (2)	842	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, at fair value (2)	0	0
Third-party pricing services [Member] | Fair Value, Inputs, Level 3 [Member] | Securities of U.S. states and political subdivisions [Member]
Financial assets
Available-for-sale, at fair value (2)	43	49
Third-party pricing services [Member] | Fair Value, Inputs, Level 3 [Member] | Mortgage-backed securities [Member]
Financial assets
Available-for-sale, at fair value (2)	41	75
Third-party pricing services [Member] | Fair Value, Inputs, Level 3 [Member] | Other debt securities [Member]
Financial assets
Available-for-sale, at fair value (2)	758	22
Third-party pricing services [Member] | Fair Value, Inputs, Level 3 [Member] | Equity securities [Member]
Financial assets
Equity securities	0	0
Third-party pricing services [Member] | Fair Value, Inputs, Level 3 [Member] | Marketable equity securities [Member]
Financial assets
Marketable equity securities	0	0
Third-party pricing services [Member] | Fair Value, Inputs, Level 3 [Member] | Nonmarketable equity securities [Member]
Financial assets
Nonmarketable equity securities	$ 0	$ 0
[1]	(2)Financial information for the prior period has been revised to reflect presentation changes in connection with our 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 Liabilit

Fair Value, Assets and Liabilities Recorded at Fair Value on a Recurring Basis (Details) - USD ($) $ in Millions		Dec. 31, 2018	Dec. 31, 2017
Assets:
Trading debt securities		$ 69,989	$ 57,624	[1]
Available-for-sale, at fair value (2)		269,912	276,407	[1]
Mortgage loans held for sale	[2]	11,771	16,116
Loans held for sale		1,469	1,023	[1]
Loans	[2]	244	376
Mortgage servicing rights		14,649	13,625
Fair value asset derivatives		34,560	36,355
Net amounts in consolidated balance sheet, asset		10,770	12,228
Marketable equity securities		29,556	39,227	[1]
Equity securities		55,148	62,497	[1]
Liabilities:
Total derivative liabilities		(32,047)	(34,298)
Net amounts in consolidated balance sheet, liability		(8,499)	(8,796)
Interest rate contract [Member]
Assets:
Net amounts in consolidated balance sheet, asset		6,406	5,701
Liabilities:
Net amounts in consolidated balance sheet, liability		(3,156)	(2,246)
Commodity contract [Member]
Assets:
Net amounts in consolidated balance sheet, asset		739	1,388
Liabilities:
Net amounts in consolidated balance sheet, liability		(1,609)	(687)
Equity contract [Member]
Assets:
Net amounts in consolidated balance sheet, asset		2,227	2,774
Liabilities:
Net amounts in consolidated balance sheet, liability		(2,133)	(4,460)
Foreign exchange contract [Member]
Assets:
Net amounts in consolidated balance sheet, asset		1,359	2,317
Liabilities:
Net amounts in consolidated balance sheet, liability		(1,591)	(1,379)
Securities of U.S. Treasury and federal agencies [Member]
Assets:
Available-for-sale, at fair value (2)		13,348	6,319
Securities of U.S. states and political subdivisions [Member]
Assets:
Available-for-sale, at fair value (2)		49,264	51,326
Mortgage-backed securities [Member]
Assets:
Available-for-sale, at fair value (2)		160,203	169,392
Federal agencies [Member]
Assets:
Available-for-sale, at fair value (2)		153,203	160,219
Residential [Member]
Assets:
Available-for-sale, at fair value (2)		2,775	4,608
Commercial [Member]
Assets:
Available-for-sale, at fair value (2)		4,225	4,565
Corporate debt securities [Member]
Assets:
Available-for-sale, at fair value (2)		6,271	7,666
Collateralized loan obligations [Member]
Assets:
Available-for-sale, at fair value (2)		35,343	36,056
Collateralized debt obligations [Member]
Assets:
Available-for-sale, at fair value (2)		800	1,000
Other debt securities [Member]
Assets:
Available-for-sale, at fair value (2)		5,483	5,648
Nonmarketable equity securities [Member]
Assets:
Nonmarketable equity securities		5,455	4,867
Fair Value, Measurements, Recurring [Member]
Assets:
Mortgage loans held for sale		11,771	16,116
Loans held for sale		1,469	1,023
Loans		244	376
Mortgage servicing rights		14,649	13,625
Fair value asset derivatives, netting		(23,790)	(24,127)
Net amounts in consolidated balance sheet, asset		10,770	12,228
Total assets recorded at fair value		408,360	416,626
Liabilities:
Fair value liability derivatives, netting		23,548	25,502
Net amounts in consolidated balance sheet, liability		(8,499)	(8,796)
Total short sale liabilities		(19,720)	(18,472)
Other liabilities		(2)	(3)
Total liabilities recorded at fair value		(28,221)	(27,271)
Fair Value, Measurements, Recurring [Member] | Excluding NAV Investments [Member]
Assets:
Fair value asset derivatives, netting		(23,790)	(24,127)
Total assets recorded at fair value		408,258	416,626
Fair Value, Measurements, Recurring [Member] | Interest rate contract [Member]
Assets:
Fair value asset derivatives		18,435	17,630
Liabilities:
Total derivative liabilities		(16,308)	(15,472)
Fair Value, Measurements, Recurring [Member] | Commodity contract [Member]
Assets:
Fair value asset derivatives		1,588	2,354
Liabilities:
Total derivative liabilities		(2,336)	(1,335)
Fair Value, Measurements, Recurring [Member] | Equity contract [Member]
Assets:
Fair value asset derivatives		7,545	7,007
Liabilities:
Total derivative liabilities		(6,010)	(8,501)
Fair Value, Measurements, Recurring [Member] | Foreign exchange contract [Member]
Assets:
Fair value asset derivatives		6,714	8,973
Liabilities:
Total derivative liabilities		(7,113)	(8,568)
Fair Value, Measurements, Recurring [Member] | Credit contract [Member]
Assets:
Fair value asset derivatives		278	391
Liabilities:
Total derivative liabilities		(280)	(422)
Fair Value, Measurements, Recurring [Member] | Debt securities [Member]
Assets:
Trading debt securities		69,989	57,624
Available-for-sale, at fair value (2)		269,912	276,407
Fair Value, Measurements, Recurring [Member] | Securities of U.S. Treasury and federal agencies [Member]
Assets:
Trading debt securities		23,417	14,874
Available-for-sale, at fair value (2)		13,348	6,319
Liabilities:
Total short sale liabilities		(12,261)	(10,988)
Fair Value, Measurements, Recurring [Member] | Securities of U.S. states and political subdivisions [Member]
Assets:
Trading debt securities		3,275	3,735
Available-for-sale, at fair value (2)		49,264	51,326
Fair Value, Measurements, Recurring [Member] | Other trading debt securities [Member]
Assets:
Trading debt securities		22	39
Fair Value, Measurements, Recurring [Member] | Mortgage-backed securities [Member]
Assets:
Trading debt securities		30,715	25,273
Available-for-sale, at fair value (2)		160,203	169,392
Fair Value, Measurements, Recurring [Member] | Federal agencies [Member]
Assets:
Available-for-sale, at fair value (2)		153,203	160,219
Fair Value, Measurements, Recurring [Member] | Residential [Member]
Assets:
Available-for-sale, at fair value (2)		2,775	4,608
Fair Value, Measurements, Recurring [Member] | Commercial [Member]
Assets:
Available-for-sale, at fair value (2)		4,225	4,565
Fair Value, Measurements, Recurring [Member] | Mortgage backed securities, other [Member]
Liabilities:
Total short sale liabilities		(47)	0
Fair Value, Measurements, Recurring [Member] | Corporate debt securities [Member]
Assets:
Trading debt securities		10,757	11,791
Available-for-sale, at fair value (2)		6,271	7,666
Liabilities:
Total short sale liabilities		(4,505)	(4,986)
Fair Value, Measurements, Recurring [Member] | Collateralized loan obligations [Member]
Assets:
Trading debt securities		910	919
Available-for-sale, at fair value (2)		35,343	36,056
Fair Value, Measurements, Recurring [Member] | Asset-backed securities [Member]
Assets:
Trading debt securities		893	993
Available-for-sale, at fair value (2)		5,482	5,648
Fair Value, Measurements, Recurring [Member] | Auto loans and leases [Member]
Assets:
Available-for-sale, at fair value (2)		925	553
Fair Value, Measurements, Recurring [Member] | Home equity loans [Member]
Assets:
Available-for-sale, at fair value (2)		112	149
Fair Value, Measurements, Recurring [Member] | Other asset-backed securities [Member]
Assets:
Available-for-sale, at fair value (2)		4,445	4,946
Fair Value, Measurements, Recurring [Member] | Other debt securities [Member]
Assets:
Available-for-sale, at fair value (2)		1	0
Fair Value, Measurements, Recurring [Member] | Equity securities [Member]
Liabilities:
Total short sale liabilities		(2,904)	(2,213)
Fair Value, Measurements, Recurring [Member] | Equity securities [Member] | Excluding NAV Investments [Member]
Assets:
Equity securities		29,454	39,227
Fair Value, Measurements, Recurring [Member] | Marketable equity securities [Member] | Excluding NAV Investments [Member]
Assets:
Marketable equity securities		23,962	34,360
Fair Value, Measurements, Recurring [Member] | Nonmarketable equity securities [Member] | Excluding NAV Investments [Member]
Assets:
Nonmarketable equity securities		5,492	4,867
Fair Value, Measurements, Recurring [Member] | Other securities sold, not yet purchased [Member]
Liabilities:
Total short sale liabilities		(3)	(285)
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Assets:
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, asset		1,711	1,734
Liabilities:
Fair value liability derivatives, netting		0	0
Net amounts in consolidated balance sheet, liability		(1,525)	(1,349)
Total short sale liabilities		(14,752)	(12,588)
Other liabilities		0	0
Total liabilities recorded at fair value		(16,277)	(13,937)
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Excluding NAV Investments [Member]
Assets:
Total assets recorded at fair value		55,874	51,601
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Interest rate contract [Member]
Assets:
Fair value asset derivatives		46	17
Liabilities:
Total derivative liabilities		(21)	(17)
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Commodity contract [Member]
Assets:
Fair value asset derivatives		0	0
Liabilities:
Total derivative liabilities		0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Equity contract [Member]
Assets:
Fair value asset derivatives		1,648	1,698
Liabilities:
Total derivative liabilities		(1,492)	(1,313)
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Foreign exchange contract [Member]
Assets:
Fair value asset derivatives		17	19
Liabilities:
Total derivative liabilities		(12)	(19)
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Credit contract [Member]
Assets:
Fair value asset derivatives		0	0
Liabilities:
Total derivative liabilities		0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Debt securities [Member]
Assets:
Trading debt securities		20,525	12,491
Available-for-sale, at fair value (2)		10,433	3,445
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Securities of U.S. Treasury and federal agencies [Member]
Assets:
Trading debt securities		20,525	12,491
Available-for-sale, at fair value (2)		10,399	3,389
Liabilities:
Total short sale liabilities		(11,850)	(10,420)
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Securities of U.S. states and political subdivisions [Member]
Assets:
Trading debt securities		0	0
Available-for-sale, at fair value (2)		0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Other trading debt securities [Member]
Assets:
Trading debt securities		0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Mortgage-backed securities [Member]
Assets:
Trading debt securities		0	0
Available-for-sale, at fair value (2)		0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Federal agencies [Member]
Assets:
Available-for-sale, at fair value (2)		0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Residential [Member]
Assets:
Available-for-sale, at fair value (2)		0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Commercial [Member]
Assets:
Available-for-sale, at fair value (2)		0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Mortgage backed securities, other [Member]
Liabilities:
Total short sale liabilities		0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Corporate debt securities [Member]
Assets:
Trading debt securities		0	0
Available-for-sale, at fair value (2)		34	56
Liabilities:
Total short sale liabilities		0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Collateralized loan obligations [Member]
Assets:
Trading debt securities		0	0
Available-for-sale, at fair value (2)		0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Asset-backed securities [Member]
Assets:
Trading debt securities		0	0
Available-for-sale, at fair value (2)		0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Auto loans and leases [Member]
Assets:
Available-for-sale, at fair value (2)		0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Home equity loans [Member]
Assets:
Available-for-sale, at fair value (2)		0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Other asset-backed securities [Member]
Assets:
Available-for-sale, at fair value (2)		0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Other debt securities [Member]
Assets:
Available-for-sale, at fair value (2)		0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Equity securities [Member]
Liabilities:
Total short sale liabilities		(2,902)	(2,168)
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Equity securities [Member] | Excluding NAV Investments [Member]
Assets:
Equity securities		23,205	33,931
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Marketable equity securities [Member] | Excluding NAV Investments [Member]
Assets:
Marketable equity securities		23,205	33,931
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Nonmarketable equity securities [Member] | Excluding NAV Investments [Member]
Assets:
Nonmarketable equity securities		0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Other securities sold, not yet purchased [Member]
Liabilities:
Total short sale liabilities		0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Assets:
Mortgage loans held for sale		10,774	15,118
Loans held for sale		1,409	1,009
Loans		0	0
Mortgage servicing rights		0	0
Fair value asset derivatives, netting		0	0
Net amounts in consolidated balance sheet, asset		31,279	32,980
Liabilities:
Fair value liability derivatives, netting		0	0
Net amounts in consolidated balance sheet, liability		(28,973)	(30,930)
Total short sale liabilities		(4,968)	(5,884)
Other liabilities		0	0
Total liabilities recorded at fair value		(33,941)	(36,814)
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Excluding NAV Investments [Member]
Assets:
Total assets recorded at fair value		350,852	364,276
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Interest rate contract [Member]
Assets:
Fair value asset derivatives		18,294	17,479
Liabilities:
Total derivative liabilities		(16,217)	(15,392)
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Commodity contract [Member]
Assets:
Fair value asset derivatives		1,535	2,318
Liabilities:
Total derivative liabilities		(2,287)	(1,318)
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Equity contract [Member]
Assets:
Fair value asset derivatives		4,582	3,970
Liabilities:
Total derivative liabilities		(3,186)	(5,338)
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Foreign exchange contract [Member]
Assets:
Fair value asset derivatives		6,689	8,944
Liabilities:
Total derivative liabilities		(7,067)	(8,546)
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Credit contract [Member]
Assets:
Fair value asset derivatives		179	269
Liabilities:
Total derivative liabilities		(216)	(336)
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Debt securities [Member]
Assets:
Trading debt securities		49,174	44,726
Available-for-sale, at fair value (2)		257,435	269,968
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Securities of U.S. Treasury and federal agencies [Member]
Assets:
Trading debt securities		2,892	2,383
Available-for-sale, at fair value (2)		2,949	2,930
Liabilities:
Total short sale liabilities		(411)	(568)
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Securities of U.S. states and political subdivisions [Member]
Assets:
Trading debt securities		3,272	3,732
Available-for-sale, at fair value (2)		48,820	50,401
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Other trading debt securities [Member]
Assets:
Trading debt securities		6	20
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Mortgage-backed securities [Member]
Assets:
Trading debt securities		30,715	25,273
Available-for-sale, at fair value (2)		160,162	169,316
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Federal agencies [Member]
Assets:
Available-for-sale, at fair value (2)		153,203	160,219
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Residential [Member]
Assets:
Available-for-sale, at fair value (2)		2,775	4,607
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Commercial [Member]
Assets:
Available-for-sale, at fair value (2)		4,184	4,490
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Mortgage backed securities, other [Member]
Liabilities:
Total short sale liabilities		(47)	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Corporate debt securities [Member]
Assets:
Trading debt securities		10,723	11,760
Available-for-sale, at fair value (2)		5,867	7,203
Liabilities:
Total short sale liabilities		(4,505)	(4,986)
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Collateralized loan obligations [Member]
Assets:
Trading debt securities		673	565
Available-for-sale, at fair value (2)		34,543	35,036
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Asset-backed securities [Member]
Assets:
Trading debt securities		893	993
Available-for-sale, at fair value (2)		5,093	5,082
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Auto loans and leases [Member]
Assets:
Available-for-sale, at fair value (2)		925	553
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Home equity loans [Member]
Assets:
Available-for-sale, at fair value (2)		112	149
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Other asset-backed securities [Member]
Assets:
Available-for-sale, at fair value (2)		4,056	4,380
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Other debt securities [Member]
Assets:
Available-for-sale, at fair value (2)		1	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Equity securities [Member]
Liabilities:
Total short sale liabilities		(2)	(45)
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Equity securities [Member] | Excluding NAV Investments [Member]
Assets:
Equity securities		781	475
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Marketable equity securities [Member] | Excluding NAV Investments [Member]
Assets:
Marketable equity securities		757	429
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Nonmarketable equity securities [Member] | Excluding NAV Investments [Member]
Assets:
Nonmarketable equity securities		24	46
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Other securities sold, not yet purchased [Member]
Liabilities:
Total short sale liabilities		(3)	(285)
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Assets:
Mortgage loans held for sale		997	998
Loans held for sale		60	14
Loans		244	376
Mortgage servicing rights		14,649	13,625
Fair value asset derivatives, netting		0	0
Net amounts in consolidated balance sheet, asset		1,570	1,641
Total assets recorded at fair value		25,300	24,900
Liabilities:
Fair value liability derivatives, netting		0	0
Net amounts in consolidated balance sheet, liability		(1,549)	(2,019)
Total short sale liabilities		0	0
Other liabilities		(2)	(3)
Total liabilities recorded at fair value		(1,551)	(2,022)
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Excluding NAV Investments [Member]
Assets:
Total assets recorded at fair value		25,322	24,876
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Interest rate contract [Member]
Assets:
Fair value asset derivatives		95	134
Liabilities:
Total derivative liabilities		(70)	(63)
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Commodity contract [Member]
Assets:
Fair value asset derivatives		53	36
Liabilities:
Total derivative liabilities		(49)	(17)
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Equity contract [Member]
Assets:
Fair value asset derivatives		1,315	1,339
Liabilities:
Total derivative liabilities		(1,332)	(1,850)
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Foreign exchange contract [Member]
Assets:
Fair value asset derivatives		8	10
Liabilities:
Total derivative liabilities		(34)	(3)
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Credit contract [Member]
Assets:
Fair value asset derivatives		99	122
Liabilities:
Total derivative liabilities		(64)	(86)
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Debt securities [Member]
Assets:
Trading debt securities		290	407
Available-for-sale, at fair value (2)		2,044	2,994
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Securities of U.S. Treasury and federal agencies [Member]
Assets:
Trading debt securities		0	0
Available-for-sale, at fair value (2)		0	0
Liabilities:
Total short sale liabilities		0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Securities of U.S. states and political subdivisions [Member]
Assets:
Trading debt securities		3	3
Available-for-sale, at fair value (2)		444	925
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Other trading debt securities [Member]
Assets:
Trading debt securities		16	19
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Mortgage-backed securities [Member]
Assets:
Trading debt securities		0	0
Available-for-sale, at fair value (2)		41	76
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Federal agencies [Member]
Assets:
Available-for-sale, at fair value (2)		0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Residential [Member]
Assets:
Available-for-sale, at fair value (2)		0	1
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Commercial [Member]
Assets:
Available-for-sale, at fair value (2)		41	75
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Mortgage backed securities, other [Member]
Liabilities:
Total short sale liabilities		0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Corporate debt securities [Member]
Assets:
Trading debt securities		34	31
Available-for-sale, at fair value (2)		370	407
Liabilities:
Total short sale liabilities		0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Collateralized loan obligations [Member]
Assets:
Trading debt securities		237	354
Available-for-sale, at fair value (2)		800	1,020
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Collateralized debt obligations [Member]
Assets:
Available-for-sale, at fair value (2)		800	1,000
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Asset-backed securities [Member]
Assets:
Trading debt securities		0	0
Available-for-sale, at fair value (2)		389	566
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Auto loans and leases [Member]
Assets:
Available-for-sale, at fair value (2)		0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Home equity loans [Member]
Assets:
Available-for-sale, at fair value (2)		0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Other asset-backed securities [Member]
Assets:
Available-for-sale, at fair value (2)		389	566
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Other debt securities [Member]
Assets:
Available-for-sale, at fair value (2)		0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Equity securities [Member]
Liabilities:
Total short sale liabilities		0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Equity securities [Member] | Excluding NAV Investments [Member]
Assets:
Equity securities		5,468	4,821
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Marketable equity securities [Member] | Excluding NAV Investments [Member]
Assets:
Marketable equity securities		0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Nonmarketable equity securities [Member] | Excluding NAV Investments [Member]
Assets:
Nonmarketable equity securities		5,468	4,821
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Other securities sold, not yet purchased [Member]
Liabilities:
Total short sale liabilities		0	0
Fair Value, Measurements, Recurring [Member] | Fair Value Measured at Net Asset Value Per Share [Member] | Including NAV Investments [Member]
Assets:
Marketable equity securities		$ 102	$ 0
[1]	(2)Financial information for the prior period has been revised to reflect presentation changes in connection with our 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]	(3)Parenthetical amounts represent assets and liabilities that we are required to carry at fair value or have elected the fair value option.

Fair Value, Assets and Liabil_2

Fair Value, Assets and Liabilities Measured on Recurring Basis Level 3 Reconciliation (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Equity securities [Member]
Assets:
Balance, beginning of period		$ 3,259	$ 3,065
Net gains (losses) included in net income	$ 703	1,563	(30)
Net gains (losses) included in other comprehensive income	0	0	0
Purchases, sales, issuances and settlements, net	(450)	(2)	223
Transfers into Level 3	16	1	1
Transfers out of Level 3	(4)	0	0
Balance, end of period	5,468		3,259
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	642	1,569	(30)
Equity securities [Member] | Previously Reported [Member]
Assets:
Balance, beginning of period	4,821
Balance, end of period		4,821
Equity securities [Member] | Restatement Adjustment [Member]
Assets:
Balance, beginning of period	5,203
Balance, end of period		5,203
Marketable equity securities [Member]
Assets:
Balance, beginning of period		0	0
Net gains (losses) included in net income	0	0	0
Net gains (losses) included in other comprehensive income	0	0	0
Purchases, sales, issuances and settlements, net	0	0	(1)
Transfers into Level 3	0	0	1
Transfers out of Level 3	0	0	0
Balance, end of period	0		0
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	0	0	0
Marketable equity securities [Member] | Previously Reported [Member]
Assets:
Balance, beginning of period	0
Balance, end of period		0
Marketable equity securities [Member] | Restatement Adjustment [Member]
Assets:
Balance, beginning of period	0
Balance, end of period		0
Nonmarketable equity securities [Member]
Assets:
Balance, beginning of period		3,259	3,065
Net gains (losses) included in net income	703	1,563	(30)
Net gains (losses) included in other comprehensive income	0	0	0
Purchases, sales, issuances and settlements, net	(450)	(2)	224
Transfers into Level 3	16	1	0
Transfers out of Level 3	(4)	0	0
Balance, end of period	5,468		3,259
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	642	1,569	(30)
Nonmarketable equity securities [Member] | Previously Reported [Member]
Assets:
Balance, beginning of period	4,821
Balance, end of period		4,821
Nonmarketable equity securities [Member] | Restatement Adjustment [Member]
Assets:
Balance, beginning of period	5,203
Balance, end of period		5,203
Auction rate securities [Member] | Restatement Adjustment [Member] | Accounting Standards Update 2016-01 [Member]
Assets:
Balance, beginning of period	382
Balance, end of period		382
Trading Debt Securities [Member]
Assets:
Balance, beginning of period	407	374	441
Net gains (losses) included in net income	(16)	(4)	(51)
Net gains (losses) included in other comprehensive income	0	0	0
Purchases, sales, issuances and settlements, net	(85)	35	(4)
Transfers into Level 3	0	6	1
Transfers out of Level 3	(16)	(4)	(13)
Balance, end of period	290	407	374
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	(15)	(15)	(41)
Trading Debt Securities [Member] | Securities of U.S. states and political subdivisions [Member]
Assets:
Balance, beginning of period	3	3	8
Net gains (losses) included in net income	0	0	0
Net gains (losses) included in other comprehensive income	0	0	0
Purchases, sales, issuances and settlements, net	0	0	(5)
Transfers into Level 3	0	0	0
Transfers out of Level 3	0	0	0
Balance, end of period	3	3	3
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	0	0	0
Trading Debt Securities [Member] | Corporate debt securities [Member]
Assets:
Balance, beginning of period	31	34	56
Net gains (losses) included in net income	(1)	2	(7)
Net gains (losses) included in other comprehensive income	0	0	0
Purchases, sales, issuances and settlements, net	16	(7)	(13)
Transfers into Level 3	0	6	0
Transfers out of Level 3	(12)	(4)	(2)
Balance, end of period	34	31	34
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	(1)	2	0
Trading Debt Securities [Member] | Collateralized loan obligations [Member]
Assets:
Balance, beginning of period	354	309	343
Net gains (losses) included in net income	(12)	3	(38)
Net gains (losses) included in other comprehensive income	0	0	0
Purchases, sales, issuances and settlements, net	(101)	42	15
Transfers into Level 3	0	0	0
Transfers out of Level 3	(4)	0	(11)
Balance, end of period	237	354	309
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	(14)	(13)	(42)
Trading Debt Securities [Member] | Other trading debt securities [Member]
Assets:
Balance, beginning of period	19	28	34
Net gains (losses) included in net income	(3)	(9)	(6)
Net gains (losses) included in other comprehensive income	0	0	0
Purchases, sales, issuances and settlements, net	0	0	(1)
Transfers into Level 3	0	0	1
Transfers out of Level 3	0	0	0
Balance, end of period	16	19	28
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	0	(4)	1
Available-for-sale securities [Member] | Debt securities [Member]
Assets:
Balance, beginning of period	2,994	3,505	3,726
Net gains (losses) included in net income	89	22	79
Net gains (losses) included in other comprehensive income	(18)	134	2
Purchases, sales, issuances and settlements, net	(677)	662	99
Transfers into Level 3	0	5	80
Transfers out of Level 3	(344)	(1,334)	(481)
Balance, end of period	2,044	2,994	3,505
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	(4)	(11)	(7)
Available-for-sale securities [Member] | Securities of U.S. states and political subdivisions [Member]
Assets:
Balance, beginning of period	925	1,140	1,500
Net gains (losses) included in net income	8	4	6
Net gains (losses) included in other comprehensive income	(8)	5	(25)
Purchases, sales, issuances and settlements, net	(137)	1,105	60
Transfers into Level 3	0	5	80
Transfers out of Level 3	(344)	(1,334)	(481)
Balance, end of period	444	925	1,140
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	0	0	0
Available-for-sale securities [Member] | Mortgage-backed securities [Member]
Assets:
Balance, beginning of period	76	92	74
Net gains (losses) included in net income	0	(4)	0
Net gains (losses) included in other comprehensive income	(1)	0	1
Purchases, sales, issuances and settlements, net	(34)	(12)	17
Transfers into Level 3	0	0	0
Transfers out of Level 3	0	0	0
Balance, end of period	41	76	92
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	(1)	(11)	(1)
Available-for-sale securities [Member] | Residential [Member]
Assets:
Balance, beginning of period	1	1	1
Net gains (losses) included in net income	0	0	0
Net gains (losses) included in other comprehensive income	0	0	0
Purchases, sales, issuances and settlements, net	(1)	0	0
Transfers into Level 3	0	0	0
Transfers out of Level 3	0	0	0
Balance, end of period	0	1	1
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	0	0	0
Available-for-sale securities [Member] | Commercial [Member]
Assets:
Balance, beginning of period	75	91	73
Net gains (losses) included in net income	0	(4)	0
Net gains (losses) included in other comprehensive income	(1)	0	1
Purchases, sales, issuances and settlements, net	(33)	(12)	17
Transfers into Level 3	0	0	0
Transfers out of Level 3	0	0	0
Balance, end of period	41	75	91
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	(1)	(11)	(1)
Available-for-sale securities [Member] | Corporate debt securities [Member]
Assets:
Balance, beginning of period	407	432	405
Net gains (losses) included in net income	4	(1)	21
Net gains (losses) included in other comprehensive income	(3)	23	35
Purchases, sales, issuances and settlements, net	(38)	(47)	(29)
Transfers into Level 3	0	0	0
Transfers out of Level 3	0	0	0
Balance, end of period	370	407	432
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	0	0	(2)
Available-for-sale securities [Member] | Collateralized loan obligations [Member]
Assets:
Balance, beginning of period	1,020	879	565
Net gains (losses) included in net income	72	22	50
Net gains (losses) included in other comprehensive income	5	103	(1)
Purchases, sales, issuances and settlements, net	(297)	16	265
Transfers into Level 3	0	0	0
Transfers out of Level 3	0	0	0
Balance, end of period	800	1,020	879
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	0	0	0
Available-for-sale securities [Member] | Asset-backed securities [Member]
Assets:
Balance, beginning of period	566	962	1,182
Net gains (losses) included in net income	5	1	2
Net gains (losses) included in other comprehensive income	(11)	3	(8)
Purchases, sales, issuances and settlements, net	(171)	(400)	(214)
Transfers into Level 3	0	0	0
Transfers out of Level 3	0	0	0
Balance, end of period	389	566	962
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	(3)	0	(4)
Available-for-sale securities [Member] | Other asset-backed securities [Member]
Assets:
Balance, beginning of period	566	962	1,182
Net gains (losses) included in net income	5	1	2
Net gains (losses) included in other comprehensive income	(11)	3	(8)
Purchases, sales, issuances and settlements, net	(171)	(400)	(214)
Transfers into Level 3	0	0	0
Transfers out of Level 3	0	0	0
Balance, end of period	389	566	962
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	(3)	0	(4)
Mortgage loans held for sale [Member]
Assets:
Balance, beginning of period	998	985	1,082
Net gains (losses) included in net income	(27)	(36)	(19)
Net gains (losses) included in other comprehensive income	0	0	0
Purchases, sales, issuances and settlements, net	(36)	(75)	(159)
Transfers into Level 3	72	134	98
Transfers out of Level 3	(10)	(10)	(17)
Balance, end of period	997	998	985
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	(22)	(34)	(24)
Loans held for sale [Member]
Assets:
Balance, beginning of period	14	0	0
Net gains (losses) included in net income	2	1	0
Net gains (losses) included in other comprehensive income	0	0	0
Purchases, sales, issuances and settlements, net	(36)	(3)	0
Transfers into Level 3	80	34	0
Transfers out of Level 3	0	(18)	0
Balance, end of period	60	14	0
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	1	0	0
Loans [Member]
Assets:
Balance, beginning of period	376	758	5,316
Net gains (losses) included in net income	(1)	(6)	(59)
Net gains (losses) included in other comprehensive income	0	0	0
Purchases, sales, issuances and settlements, net	(131)	(376)	(4,499)
Transfers into Level 3	0	0	0
Transfers out of Level 3	0	0	0
Balance, end of period	244	376	758
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	(11)	(12)	(24)
Mortgage servicing rights [Member]
Assets:
Balance, beginning of period	13,625	12,959	12,415
Net gains (losses) included in net income	(915)	(2,115)	(1,595)
Net gains (losses) included in other comprehensive income	0	0	0
Purchases, sales, issuances and settlements, net	1,939	2,781	2,139
Transfers into Level 3	0	0	0
Transfers out of Level 3	0	0	0
Balance, end of period	14,649	13,625	12,959
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	960	(126)	565
Derivative [Member]
Assets and Liabilities:
Balance, beginning of period	(378)	(81)	128
Net gains (losses) included in net income	(539)	434	812
Total net gains (losses) included in other comprehensive income	0	0	0
Purchases, sales, issuances and settlements, net	865	(723)	(1,113)
Transfers into Level 3	(8)	(51)	41
Transfers out of Level 3	81	43	51
Balance, end of period	21	(378)	(81)
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	(239)	(352)	38
Derivative [Member] | Interest rate contract [Member]
Assets and Liabilities:
Balance, beginning of period	71	121	288
Net gains (losses) included in net income	(397)	604	843
Total net gains (losses) included in other comprehensive income	0	0	0
Purchases, sales, issuances and settlements, net	351	(654)	(1,003)
Transfers into Level 3	0	0	0
Transfers out of Level 3	0	0	(7)
Balance, end of period	25	71	121
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	(42)	(52)	170
Derivative [Member] | Commodity contract [Member]
Assets and Liabilities:
Balance, beginning of period	19	23	12
Net gains (losses) included in net income	3	(17)	10
Total net gains (losses) included in other comprehensive income	0	0	0
Purchases, sales, issuances and settlements, net	(11)	13	(2)
Transfers into Level 3	(7)	2	4
Transfers out of Level 3	0	(2)	(1)
Balance, end of period	4	19	23
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	(1)	15	11
Derivative [Member] | Equity contract [Member]
Assets and Liabilities:
Balance, beginning of period	(511)	(267)	(111)
Net gains (losses) included in net income	(108)	(199)	(80)
Total net gains (losses) included in other comprehensive income	0	0	0
Purchases, sales, issuances and settlements, net	522	(37)	(156)
Transfers into Level 3	(1)	(53)	21
Transfers out of Level 3	81	45	59
Balance, end of period	(17)	(511)	(267)
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	(169)	(259)	(176)
Derivative [Member] | Foreign exchange contract [Member]
Assets and Liabilities:
Balance, beginning of period	7	12	0
Net gains (losses) included in net income	(42)	(5)	(3)
Total net gains (losses) included in other comprehensive income	0	0	0
Purchases, sales, issuances and settlements, net	9	0	(1)
Transfers into Level 3	0	0	16
Transfers out of Level 3	0	0	0
Balance, end of period	(26)	7	12
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	(26)	6	(4)
Derivative [Member] | Credit contract [Member]
Assets and Liabilities:
Balance, beginning of period	36	77	(3)
Net gains (losses) included in net income	5	24	31
Total net gains (losses) included in other comprehensive income	0	0	0
Purchases, sales, issuances and settlements, net	(6)	(65)	49
Transfers into Level 3	0	0	0
Transfers out of Level 3	0	0	0
Balance, end of period	35	36	77
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	(1)	(62)	26
Derivative [Member] | Other contract [Member]
Assets and Liabilities:
Balance, beginning of period	0	(47)	(58)
Net gains (losses) included in net income	0	27	11
Total net gains (losses) included in other comprehensive income	0	0	0
Purchases, sales, issuances and settlements, net	0	20	0
Transfers into Level 3	0	0	0
Transfers out of Level 3	0	0	0
Balance, end of period	0	0	(47)
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	0	0	11
Short sale liabilities [Member]
Liabilities:
Balance, beginning of period	0	0	0
Net gains (losses) included in net income	0	0	0
Net gains (losses) included in other comprehensive income	0	0	0
Purchases, sales, issuances and settlements, net	0	0	0
Transfers into Level 3	0	0	0
Transfers out of Level 3	0	0	0
Balance, end of period	0	0	0
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	0	0	0
Other liabilities [Member]
Liabilities:
Balance, beginning of period	(3)	(4)	(30)
Net gains (losses) included in net income	1	1	1
Net gains (losses) included in other comprehensive income	0	0	0
Purchases, sales, issuances and settlements, net	0	0	25
Transfers into Level 3	0	0	0
Transfers out of Level 3	0	0	0
Balance, end of period	(2)	(3)	(4)
Net unrealized gains (losses) included in income related to assets and liabilities held at period end	$ 0	$ 0	$ 0

Fair Value, Assets and Liabil_3

Fair Value, Assets and Liabilities Measured on Recurring Basis Level 3 Reconciliation Breakout (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Equity securities [Member]
Assets:
Purchases	$ 0	$ 0	$ 225
Sales	(51)	(2)	(1)
Issuances	0	0	0
Settlements	(399)	0	(1)
Purchases, sales, issuances and settlements, net	(450)	(2)	223
Marketable equity securities [Member]
Assets:
Purchases	0	0	0
Sales	0	0	(1)
Issuances	0	0	0
Settlements	0	0	0
Purchases, sales, issuances and settlements, net	0	0	(1)
Nonmarketable equity securities [Member]
Assets:
Purchases	0	0	225
Sales	(51)	(2)	0
Issuances	0	0	0
Settlements	(399)	0	(1)
Purchases, sales, issuances and settlements, net	(450)	(2)	224
Trading Debt Securities [Member]
Assets:
Purchases	428	501	411
Sales	(352)	(318)	(410)
Issuances	0	0	0
Settlements	(161)	(148)	(5)
Purchases, sales, issuances and settlements, net	(85)	35	(4)
Trading Debt Securities [Member] | Securities of U.S. states and political subdivisions [Member]
Assets:
Purchases	0	37	2
Sales	0	(36)	(2)
Issuances	0	0	0
Settlements	0	(1)	(5)
Purchases, sales, issuances and settlements, net	0	0	(5)
Trading Debt Securities [Member] | Corporate debt securities [Member]
Assets:
Purchases	20	25	37
Sales	(4)	(32)	(50)
Issuances	0	0	0
Settlements	0	0	0
Purchases, sales, issuances and settlements, net	16	(7)	(13)
Trading Debt Securities [Member] | Collateralized loan obligations [Member]
Assets:
Purchases	408	439	372
Sales	(348)	(250)	(357)
Issuances	0	0	0
Settlements	(161)	(147)	0
Purchases, sales, issuances and settlements, net	(101)	42	15
Trading Debt Securities [Member] | Other trading debt securities [Member]
Assets:
Purchases	0	0	0
Sales	0	0	(1)
Issuances	0	0	0
Settlements	0	0	0
Purchases, sales, issuances and settlements, net	0	0	(1)
Available-for-sale securities [Member] | Debt securities [Member]
Assets:
Purchases	119	149	754
Sales	(167)	(72)	(118)
Issuances	245	1,580	782
Settlements	(874)	(995)	(1,319)
Purchases, sales, issuances and settlements, net	(677)	662	99
Available-for-sale securities [Member] | Securities of U.S. states and political subdivisions [Member]
Assets:
Purchases	0	0	28
Sales	(6)	(68)	(24)
Issuances	79	1,369	547
Settlements	(210)	(196)	(491)
Purchases, sales, issuances and settlements, net	(137)	1,105	60
Available-for-sale securities [Member] | Mortgage-backed securities [Member]
Assets:
Purchases	0	0	22
Sales	0	0	0
Issuances	0	0	0
Settlements	(34)	(12)	(5)
Purchases, sales, issuances and settlements, net	(34)	(12)	17
Available-for-sale securities [Member] | Residential [Member]
Assets:
Purchases	0	0	0
Sales	0	0	0
Issuances	0	0	0
Settlements	(1)	0	0
Purchases, sales, issuances and settlements, net	(1)	0	0
Available-for-sale securities [Member] | Commercial [Member]
Assets:
Purchases	0	0	22
Sales	0	0	0
Issuances	0	0	0
Settlements	(33)	(12)	(5)
Purchases, sales, issuances and settlements, net	(33)	(12)	17
Available-for-sale securities [Member] | Corporate debt securities [Member]
Assets:
Purchases	33	14	36
Sales	0	(4)	(12)
Issuances	0	0	0
Settlements	(71)	(57)	(53)
Purchases, sales, issuances and settlements, net	(38)	(47)	(29)
Available-for-sale securities [Member] | Collateralized loan obligations [Member]
Assets:
Purchases	61	135	618
Sales	(149)	0	(54)
Issuances	0	0	0
Settlements	(209)	(119)	(299)
Purchases, sales, issuances and settlements, net	(297)	16	265
Available-for-sale securities [Member] | Asset-backed securities [Member]
Assets:
Purchases	25	0	50
Sales	(12)	0	(28)
Issuances	166	211	235
Settlements	(350)	(611)	(471)
Purchases, sales, issuances and settlements, net	(171)	(400)	(214)
Available-for-sale securities [Member] | Other asset-backed securities [Member]
Assets:
Purchases	25	0	50
Sales	(12)	0	(28)
Issuances	166	211	235
Settlements	(350)	(611)	(471)
Purchases, sales, issuances and settlements, net	(171)	(400)	(214)
Mortgage loans held for sale [Member]
Assets:
Purchases	87	79	87
Sales	(320)	(485)	(618)
Issuances	353	489	565
Settlements	(156)	(158)	(193)
Purchases, sales, issuances and settlements, net	(36)	(75)	(159)
Loans held for sale [Member]
Assets:
Purchases	4	0	0
Sales	(40)	(2)	0
Issuances	0	0	0
Settlements	0	(1)	0
Purchases, sales, issuances and settlements, net	(36)	(3)	0
Loans [Member]
Assets:
Purchases	8	6	21
Sales	0	(129)	(3,791)
Issuances	17	19	302
Settlements	(156)	(272)	(1,031)
Purchases, sales, issuances and settlements, net	(131)	(376)	(4,499)
Mortgage servicing rights [Member]
Assets:
Purchases	0	541	0
Sales	(71)	(24)	(66)
Issuances	2,010	2,263	2,204
Settlements	0	1	1
Purchases, sales, issuances and settlements, net	1,939	2,781	2,139
Derivative [Member]
Assets and Liabilities:
Purchases	15	6	36
Sales	(44)	(121)	(151)
Issuances	0	0	0
Settlements	894	(608)	(998)
Purchases, sales, issuances and settlements, net	865	(723)	(1,113)
Derivative [Member] | Interest rate contract [Member]
Assets and Liabilities:
Purchases	0	0	0
Sales	0	0	0
Issuances	0	0	0
Settlements	351	(654)	(1,003)
Purchases, sales, issuances and settlements, net	351	(654)	(1,003)
Derivative [Member] | Commodity contract [Member]
Assets and Liabilities:
Purchases	0	0	0
Sales	0	0	0
Issuances	0	0	0
Settlements	(11)	13	(2)
Purchases, sales, issuances and settlements, net	(11)	13	(2)
Derivative [Member] | Equity contract [Member]
Assets and Liabilities:
Purchases	3	0	29
Sales	(37)	(118)	(147)
Issuances	0	0	0
Settlements	556	81	(38)
Purchases, sales, issuances and settlements, net	522	(37)	(156)
Derivative [Member] | Foreign exchange contract [Member]
Assets and Liabilities:
Purchases	0	0	0
Sales	0	0	0
Issuances	0	0	0
Settlements	9	0	(1)
Purchases, sales, issuances and settlements, net	9	0	(1)
Derivative [Member] | Credit contract [Member]
Assets and Liabilities:
Purchases	12	6	7
Sales	(7)	(3)	(4)
Issuances	0	0	0
Settlements	(11)	(68)	46
Purchases, sales, issuances and settlements, net	(6)	(65)	49
Derivative [Member] | Other contract [Member]
Assets and Liabilities:
Purchases	0	0	0
Sales	0	0	0
Issuances	0	0	0
Settlements	0	20	0
Purchases, sales, issuances and settlements, net	0	20	0
Short sale liabilities [Member]
Liabilities:
Purchases	0	3	0
Sales	0	(3)	0
Issuances	0	0	0
Settlements	0	0	0
Purchases, sales, issuances and settlements, net	0	0	0
Other liabilities [Member]
Liabilities:
Purchases	0	0	0
Sales	0	0	0
Issuances	0	0	0
Settlements	0	0	25
Purchases, sales, issuances and settlements, net	$ 0	$ 0	$ 25

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		12 Months Ended
		Dec. 31, 2018USD ($)$ / loan	Dec. 31, 2017USD ($)$ / loan
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Mortgage loans held for sale, carried at fair value	[1]	$ 11,771	$ 16,116
Loans	[1]	244	376
Mortgage servicing rights		14,649	13,625
Fair Value Disclosures, Textual [Abstract]
Available-for-sale, at fair value (2)		269,912	276,407	[2]
Securities of U.S. states and political subdivisions [Member]
Fair Value Disclosures, Textual [Abstract]
Available-for-sale, at fair value (2)		49,264	51,326
Collateralized loan obligations [Member]
Fair Value Disclosures, Textual [Abstract]
Available-for-sale, at fair value (2)		35,343	36,056
Collateralized debt obligations [Member]
Fair Value Disclosures, Textual [Abstract]
Available-for-sale, at fair value (2)		800	1,000
Nonmarketable equity securities [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Nonmarketable equity securities		5,455	4,867
Recurring [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Mortgage loans held for sale, carried at fair value		11,771	16,116
Loans		244	376
Mortgage servicing rights		14,649	13,625
Fair Value Disclosures, Textual [Abstract]
Total assets recorded at fair value		408,360	416,626
Total liabilities recorded at fair value		28,221	27,271
Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Mortgage loans held for sale, carried at fair value		997	998
Loans		244	376
Mortgage servicing rights		14,649	13,625
Total insignificant level 3 assets, net of liabilities		497	570
Assets, fair value disclosure, net of liabilities		23,771	22,854
Fair Value Disclosures, Textual [Abstract]
Total assets recorded at fair value		25,300	24,900
Total liabilities recorded at fair value		1,551	2,022
Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Valuation, market approach [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Mortgage loans held for sale, carried at fair value		15	24
Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Valuation technique, discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Mortgage loans held for sale, carried at fair value		982	974
Loans		244	376
Mortgage servicing rights		$ 14,649	$ 13,625
Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Minimum [Member] | Valuation, market approach [Member] | Measurement Input, Comparability Adjustment [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Mortgage loans held for sale, measurement input		(0.563)	(0.563)
Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Minimum [Member] | Valuation technique, discounted cash flow [Member] | Measurement Input, Discount Rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Mortgage loans held for sale, measurement input		0.011	0.026
Loans, measurement input		0.034	0.031
Servicing asset, measurement input		0.071	0.066
Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Minimum [Member] | Valuation technique, discounted cash flow [Member] | Measurement Input, Default Rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Mortgage loans held for sale, measurement input		0	0
Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Minimum [Member] | Valuation technique, discounted cash flow [Member] | Measurement Input, Loss Severity [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Mortgage loans held for sale, measurement input		0	0.001
Loans, measurement input		0	0
Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Minimum [Member] | Valuation technique, discounted cash flow [Member] | Measurement Input, Cost of Service Per Loan [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Servicing asset, measurement input | $ / loan		62	78
Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Minimum [Member] | Valuation technique, discounted cash flow [Member] | Measurement Input, Prepayment Rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Mortgage loans held for sale, measurement input		0.032	0.065
Loans, measurement input		0.029	0.087
Servicing asset, measurement input		0.090	0.097
Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Maximum [Member] | Valuation, market approach [Member] | Measurement Input, Comparability Adjustment [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Mortgage loans held for sale, measurement input		(0.063)	(0.063)
Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Maximum [Member] | Valuation technique, discounted cash flow [Member] | Measurement Input, Discount Rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Mortgage loans held for sale, measurement input		0.066	0.073
Loans, measurement input		0.064	0.075
Servicing asset, measurement input		0.153	0.129
Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Maximum [Member] | Valuation technique, discounted cash flow [Member] | Measurement Input, Default Rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Mortgage loans held for sale, measurement input		0.156	0.071
Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Maximum [Member] | Valuation technique, discounted cash flow [Member] | Measurement Input, Loss Severity [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Mortgage loans held for sale, measurement input		0.433	0.414
Loans, measurement input		0.348	0.339
Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Maximum [Member] | Valuation technique, discounted cash flow [Member] | Measurement Input, Cost of Service Per Loan [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Servicing asset, measurement input | $ / loan		507	587
Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Maximum [Member] | Valuation technique, discounted cash flow [Member] | Measurement Input, Prepayment Rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Mortgage loans held for sale, measurement input		0.134	0.159
Loans, measurement input		1	1
Servicing asset, measurement input		0.235	0.205
Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Weighted Average [Member] | Valuation, market approach [Member] | Measurement Input, Comparability Adjustment [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Mortgage loans held for sale, measurement input		(0.363)	(0.427)
Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Weighted Average [Member] | Valuation technique, discounted cash flow [Member] | Measurement Input, Discount Rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Mortgage loans held for sale, measurement input		0.055	0.056
Loans, measurement input		0.042	0.042
Servicing asset, measurement input		0.081	0.069
Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Weighted Average [Member] | Valuation technique, discounted cash flow [Member] | Measurement Input, Default Rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Mortgage loans held for sale, measurement input		0.008	0.013
Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Weighted Average [Member] | Valuation technique, discounted cash flow [Member] | Measurement Input, Loss Severity [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Mortgage loans held for sale, measurement input		0.234	0.196
Loans, measurement input		0.102	0.066
Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Weighted Average [Member] | Valuation technique, discounted cash flow [Member] | Measurement Input, Cost of Service Per Loan [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Servicing asset, measurement input | $ / loan		106	143
Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Weighted Average [Member] | Valuation technique, discounted cash flow [Member] | Measurement Input, Prepayment Rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Mortgage loans held for sale, measurement input		0.046	0.091
Loans, measurement input		0.872	0.919
Servicing asset, measurement input		0.099	0.105
Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Interest rate contract [Member] | Valuation technique, discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Derivative assets (liabilities), at fair value, net		$ (35)	$ 54
Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Interest rate contract [Member] | Minimum [Member] | Valuation technique, discounted cash flow [Member] | Measurement Input, Default Rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Derivative asset (liability) net, measurement input		0	0
Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Interest rate contract [Member] | Minimum [Member] | Valuation technique, discounted cash flow [Member] | Measurement Input, Loss Severity [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Derivative asset (liability) net, measurement input		0.500	0.500
Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Interest rate contract [Member] | Minimum [Member] | Valuation technique, discounted cash flow [Member] | Measurement Input, Prepayment Rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Derivative asset (liability) net, measurement input		0.028	0.028
Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Interest rate contract [Member] | Maximum [Member] | Valuation technique, discounted cash flow [Member] | Measurement Input, Default Rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Derivative asset (liability) net, measurement input		0.050	0.050
Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Interest rate contract [Member] | Maximum [Member] | Valuation technique, discounted cash flow [Member] | Measurement Input, Loss Severity [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Derivative asset (liability) net, measurement input		0.500	0.500
Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Interest rate contract [Member] | Maximum [Member] | Valuation technique, discounted cash flow [Member] | Measurement Input, Prepayment Rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Derivative asset (liability) net, measurement input		0.250	0.125
Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Interest rate contract [Member] | Weighted Average [Member] | Valuation technique, discounted cash flow [Member] | Measurement Input, Default Rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Derivative asset (liability) net, measurement input		0.020	0.021
Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Interest rate contract [Member] | Weighted Average [Member] | Valuation technique, discounted cash flow [Member] | Measurement Input, Loss Severity [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Derivative asset (liability) net, measurement input		0.500	0.500
Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Interest rate contract [Member] | Weighted Average [Member] | Valuation technique, discounted cash flow [Member] | Measurement Input, Prepayment Rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Derivative asset (liability) net, measurement input		0.138	0.105
Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Derivative loan commitments [Member] | Valuation technique, discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Derivative assets (liabilities), at fair value, net		$ 60	$ 17
Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Derivative loan commitments [Member] | Minimum [Member] | Valuation technique, discounted cash flow [Member] | Measurement Input, Fall-out Factor [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Derivative asset (liability) net, measurement input		0.010	0.010
Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Derivative loan commitments [Member] | Minimum [Member] | Valuation technique, discounted cash flow [Member] | Measurement Input, Initial-value Servicing [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Derivative asset (liability) net, measurement input		(0.00366)	(0.00599)
Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Derivative loan commitments [Member] | Maximum [Member] | Valuation technique, discounted cash flow [Member] | Measurement Input, Fall-out Factor [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Derivative asset (liability) net, measurement input		0.990	0.990
Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Derivative loan commitments [Member] | Maximum [Member] | Valuation technique, discounted cash flow [Member] | Measurement Input, Initial-value Servicing [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Derivative asset (liability) net, measurement input		0.00917	0.01011
Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Derivative loan commitments [Member] | Weighted Average [Member] | Valuation technique, discounted cash flow [Member] | Measurement Input, Fall-out Factor [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Derivative asset (liability) net, measurement input		0.194	0.152
Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Derivative loan commitments [Member] | Weighted Average [Member] | Valuation technique, discounted cash flow [Member] | Measurement Input, Initial-value Servicing [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Derivative asset (liability) net, measurement input		0.00185	0.00027
Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Equity contract [Member] | Valuation technique, discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Derivative assets (liabilities), at fair value, net		$ 104	$ 102
Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Equity contract [Member] | Valuation technique, option pricing model [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Derivative assets (liabilities), at fair value, net		$ (121)	$ (613)
Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Equity contract [Member] | Minimum [Member] | Valuation technique, discounted cash flow [Member] | Measurement Input, Weighted Average Life [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Derivative, term of contract		1 year	6 months
Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Equity contract [Member] | Minimum [Member] | Valuation technique, discounted cash flow [Member] | Measurement Input, Conversion Factor [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Derivative asset (liability) net, measurement input		(0.093)	(0.097)
Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Equity contract [Member] | Minimum [Member] | Valuation technique, option pricing model [Member] | Measurement Input, Correlation Factor [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Derivative asset (liability) net, measurement input		(0.770)	(0.770)
Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Equity contract [Member] | Minimum [Member] | Valuation technique, option pricing model [Member] | Measurement Input, Price Volatility [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Derivative asset (liability) net, measurement input		0.065	0.057
Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Equity contract [Member] | Maximum [Member] | Valuation technique, discounted cash flow [Member] | Measurement Input, Weighted Average Life [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Derivative, term of contract		3 years	3 years
Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Equity contract [Member] | Maximum [Member] | Valuation technique, discounted cash flow [Member] | Measurement Input, Conversion Factor [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Derivative asset (liability) net, measurement input		0	0
Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Equity contract [Member] | Maximum [Member] | Valuation technique, option pricing model [Member] | Measurement Input, Correlation Factor [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Derivative asset (liability) net, measurement input		0.990	0.980
Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Equity contract [Member] | Maximum [Member] | Valuation technique, option pricing model [Member] | Measurement Input, Price Volatility [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Derivative asset (liability) net, measurement input		1	0.955
Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Equity contract [Member] | Weighted Average [Member] | Valuation technique, discounted cash flow [Member] | Measurement Input, Weighted Average Life [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Derivative, term of contract		1 year 9 months	1 year 7 months
Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Equity contract [Member] | Weighted Average [Member] | Valuation technique, discounted cash flow [Member] | Measurement Input, Conversion Factor [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Derivative asset (liability) net, measurement input		(0.078)	(0.076)
Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Equity contract [Member] | Weighted Average [Member] | Valuation technique, option pricing model [Member] | Measurement Input, Correlation Factor [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Derivative asset (liability) net, measurement input		0.216	0.242
Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Equity contract [Member] | Weighted Average [Member] | Valuation technique, option pricing model [Member] | Measurement Input, Price Volatility [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Derivative asset (liability) net, measurement input		0.218	0.192
Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Credit contract [Member] | Valuation, market approach [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Derivative assets (liabilities), at fair value, net		$ 3	$ (3)
Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Credit contract [Member] | Valuation technique, option pricing model [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Derivative assets (liabilities), at fair value, net		$ 32	$ 39
Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Credit contract [Member] | Minimum [Member] | Valuation, market approach [Member] | Measurement Input, Comparability Adjustment [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Derivative asset (liability) net, measurement input		(0.155)	(0.299)
Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Credit contract [Member] | Minimum [Member] | Valuation technique, option pricing model [Member] | Measurement Input, Credit Spread [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Derivative asset (liability) net, measurement input		0.009	0
Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Credit contract [Member] | Minimum [Member] | Valuation technique, option pricing model [Member] | Measurement Input, Loss Severity [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Derivative asset (liability) net, measurement input		0.130	0.130
Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Credit contract [Member] | Maximum [Member] | Valuation, market approach [Member] | Measurement Input, Comparability Adjustment [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Derivative asset (liability) net, measurement input		0.400	0.173
Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Credit contract [Member] | Maximum [Member] | Valuation technique, option pricing model [Member] | Measurement Input, Credit Spread [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Derivative asset (liability) net, measurement input		0.215	0.637
Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Credit contract [Member] | Maximum [Member] | Valuation technique, option pricing model [Member] | Measurement Input, Loss Severity [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Derivative asset (liability) net, measurement input		0.600	0.600
Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Credit contract [Member] | Weighted Average [Member] | Valuation, market approach [Member] | Measurement Input, Comparability Adjustment [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Derivative asset (liability) net, measurement input		0.035	(0.002)
Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Credit contract [Member] | Weighted Average [Member] | Valuation technique, option pricing model [Member] | Measurement Input, Credit Spread [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Derivative asset (liability) net, measurement input		0.013	0.013
Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Credit contract [Member] | Weighted Average [Member] | Valuation technique, option pricing model [Member] | Measurement Input, Loss Severity [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Derivative asset (liability) net, measurement input		0.452	0.507
Recurring [Member] | Non modified loans [Member] | Fair Value, Inputs, Level 3 [Member] | Minimum [Member] | Valuation technique, discounted cash flow [Member] | Measurement Input, Cost of Service Per Loan [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Servicing asset, measurement input | $ / loan		62	78
Recurring [Member] | Non modified loans [Member] | Fair Value, Inputs, Level 3 [Member] | Maximum [Member] | Valuation technique, discounted cash flow [Member] | Measurement Input, Cost of Service Per Loan [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Servicing asset, measurement input | $ / loan		204	252
Recurring [Member] | Debt securities [Member]
Fair Value Disclosures, Textual [Abstract]
Available-for-sale, at fair value (2)		$ 269,912	$ 276,407
Recurring [Member] | Debt securities [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Disclosures, Textual [Abstract]
Available-for-sale, at fair value (2)		2,044	2,994
Recurring [Member] | Securities of U.S. states and political subdivisions [Member]
Fair Value Disclosures, Textual [Abstract]
Available-for-sale, at fair value (2)		49,264	51,326
Recurring [Member] | Securities of U.S. states and political subdivisions [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Disclosures, Textual [Abstract]
Available-for-sale, at fair value (2)		444	925
Recurring [Member] | Government, healthcare and other revenue bonds [Member] | Fair Value, Inputs, Level 3 [Member] | Valuation technique, discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Debt securities, Trading and available-for-sale		404	$ 868
Recurring [Member] | Government, healthcare and other revenue bonds [Member] | Fair Value, Inputs, Level 3 [Member] | Valuation technique, vendor pricing [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Debt securities, Trading and available-for-sale		$ 43
Recurring [Member] | Government, healthcare and other revenue bonds [Member] | Fair Value, Inputs, Level 3 [Member] | Minimum [Member] | Valuation technique, discounted cash flow [Member] | Measurement Input, Discount Rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Debt securities, trading and available-for-sale, measurement input		0.021	0.017
Recurring [Member] | Government, healthcare and other revenue bonds [Member] | Fair Value, Inputs, Level 3 [Member] | Maximum [Member] | Valuation technique, discounted cash flow [Member] | Measurement Input, Discount Rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Debt securities, trading and available-for-sale, measurement input		0.064	0.058
Recurring [Member] | Government, healthcare and other revenue bonds [Member] | Fair Value, Inputs, Level 3 [Member] | Weighted Average [Member] | Valuation technique, discounted cash flow [Member] | Measurement Input, Discount Rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Debt securities, trading and available-for-sale, measurement input		0.034	0.027
Recurring [Member] | Municipal Bonds [Member] | Fair Value, Inputs, Level 3 [Member] | Valuation technique, discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Debt securities, Trading and available-for-sale			$ 11
Recurring [Member] | Municipal Bonds [Member] | Fair Value, Inputs, Level 3 [Member] | Valuation technique, vendor pricing [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Debt securities, Trading and available-for-sale			$ 49
Recurring [Member] | Municipal Bonds [Member] | Fair Value, Inputs, Level 3 [Member] | Minimum [Member] | Valuation technique, discounted cash flow [Member] | Measurement Input, Discount Rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Debt securities, trading and available-for-sale, measurement input			0.047
Recurring [Member] | Municipal Bonds [Member] | Fair Value, Inputs, Level 3 [Member] | Maximum [Member] | Valuation technique, discounted cash flow [Member] | Measurement Input, Discount Rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Debt securities, trading and available-for-sale, measurement input			0.049
Recurring [Member] | Municipal Bonds [Member] | Fair Value, Inputs, Level 3 [Member] | Weighted Average [Member] | Valuation technique, discounted cash flow [Member] | Measurement Input, Discount Rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Debt securities, trading and available-for-sale, measurement input			0.048
Recurring [Member] | Collateralized loan obligations [Member]
Fair Value Disclosures, Textual [Abstract]
Available-for-sale, at fair value (2)		$ 35,343	$ 36,056
Recurring [Member] | Collateralized loan obligations [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Disclosures, Textual [Abstract]
Available-for-sale, at fair value (2)		800	1,020
Recurring [Member] | Collateralized loan obligations [Member] | Fair Value, Inputs, Level 3 [Member] | Valuation, market approach [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Debt securities, Trading and available-for-sale		298	354
Recurring [Member] | Collateralized loan obligations [Member] | Fair Value, Inputs, Level 3 [Member] | Valuation technique, vendor pricing [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Debt securities, Trading and available-for-sale		$ 739	$ 1,020
Recurring [Member] | Collateralized loan obligations [Member] | Fair Value, Inputs, Level 3 [Member] | Minimum [Member] | Valuation, market approach [Member] | Measurement Input, Comparability Adjustment [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Debt securities, trading and available-for-sale, measurement input		(0.135)	(0.220)
Recurring [Member] | Collateralized loan obligations [Member] | Fair Value, Inputs, Level 3 [Member] | Maximum [Member] | Valuation, market approach [Member] | Measurement Input, Comparability Adjustment [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Debt securities, trading and available-for-sale, measurement input		0.221	0.195
Recurring [Member] | Collateralized loan obligations [Member] | Fair Value, Inputs, Level 3 [Member] | Weighted Average [Member] | Valuation, market approach [Member] | Measurement Input, Comparability Adjustment [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Debt securities, trading and available-for-sale, measurement input		0.032	0.030
Recurring [Member] | Asset-backed securities [Member]
Fair Value Disclosures, Textual [Abstract]
Available-for-sale, at fair value (2)		$ 5,482	$ 5,648
Recurring [Member] | Asset-backed securities [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Disclosures, Textual [Abstract]
Available-for-sale, at fair value (2)		389	566
Recurring [Member] | Other asset-backed securities [Member]
Fair Value Disclosures, Textual [Abstract]
Available-for-sale, at fair value (2)		4,445	4,946
Recurring [Member] | Other asset-backed securities [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Disclosures, Textual [Abstract]
Available-for-sale, at fair value (2)		389	566
Recurring [Member] | Diversified Payment Rights [Member] | Fair Value, Inputs, Level 3 [Member] | Valuation technique, discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Debt securities, Trading and available-for-sale		$ 171	$ 292
Recurring [Member] | Diversified Payment Rights [Member] | Fair Value, Inputs, Level 3 [Member] | Minimum [Member] | Valuation technique, discounted cash flow [Member] | Measurement Input, Discount Rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Debt securities, trading and available-for-sale, measurement input		0.034	0.024
Recurring [Member] | Diversified Payment Rights [Member] | Fair Value, Inputs, Level 3 [Member] | Maximum [Member] | Valuation technique, discounted cash flow [Member] | Measurement Input, Discount Rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Debt securities, trading and available-for-sale, measurement input		0.062	0.039
Recurring [Member] | Diversified Payment Rights [Member] | Fair Value, Inputs, Level 3 [Member] | Weighted Average [Member] | Valuation technique, discounted cash flow [Member] | Measurement Input, Discount Rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Debt securities, trading and available-for-sale, measurement input		0.044	0.031
Recurring [Member] | Other Commercial and Consumer [Member] | Fair Value, Inputs, Level 3 [Member] | Valuation technique, discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Debt securities, Trading and available-for-sale		$ 198	$ 248
Recurring [Member] | Other Commercial and Consumer [Member] | Fair Value, Inputs, Level 3 [Member] | Valuation technique, vendor pricing [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Debt securities, Trading and available-for-sale		$ 20	$ 26
Recurring [Member] | Other Commercial and Consumer [Member] | Fair Value, Inputs, Level 3 [Member] | Minimum [Member] | Valuation technique, discounted cash flow [Member] | Measurement Input, Discount Rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Debt securities, trading and available-for-sale, measurement input		0.046	0.037
Recurring [Member] | Other Commercial and Consumer [Member] | Fair Value, Inputs, Level 3 [Member] | Minimum [Member] | Valuation technique, discounted cash flow [Member] | Measurement Input, Weighted Average Life [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Debt securities, trading and available-for-sale, term		1 year 1 month	2 years
Recurring [Member] | Other Commercial and Consumer [Member] | Fair Value, Inputs, Level 3 [Member] | Maximum [Member] | Valuation technique, discounted cash flow [Member] | Measurement Input, Discount Rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Debt securities, trading and available-for-sale, measurement input		0.052	0.052
Recurring [Member] | Other Commercial and Consumer [Member] | Fair Value, Inputs, Level 3 [Member] | Maximum [Member] | Valuation technique, discounted cash flow [Member] | Measurement Input, Weighted Average Life [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Debt securities, trading and available-for-sale, term		1 year 6 months	2 years 4 months
Recurring [Member] | Other Commercial and Consumer [Member] | Fair Value, Inputs, Level 3 [Member] | Weighted Average [Member] | Valuation technique, discounted cash flow [Member] | Measurement Input, Discount Rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Debt securities, trading and available-for-sale, measurement input		0.047	0.039
Recurring [Member] | Other Commercial and Consumer [Member] | Fair Value, Inputs, Level 3 [Member] | Weighted Average [Member] | Valuation technique, discounted cash flow [Member] | Measurement Input, Weighted Average Life [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Debt securities, trading and available-for-sale, term		1 year 1 month	2 years 1 month
Recurring [Member] | Collateralized debt obligations [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Disclosures, Textual [Abstract]
Available-for-sale, at fair value (2)		$ 800	$ 1,000
Recurring [Member] | Nonmarketable equity securities [Member] | Fair Value, Inputs, Level 3 [Member] | Valuation, market approach [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Nonmarketable equity securities		$ 5,468	4,813
Recurring [Member] | Nonmarketable equity securities [Member] | Fair Value, Inputs, Level 3 [Member] | Valuation technique, discounted cash flow [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Nonmarketable equity securities			$ 8
Recurring [Member] | Nonmarketable equity securities [Member] | Fair Value, Inputs, Level 3 [Member] | Minimum [Member] | Valuation, market approach [Member] | Measurement Input, Comparability Adjustment [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Nonmarketable equity securities, measurement input		(20.60%)	(21.10%)
Recurring [Member] | Nonmarketable equity securities [Member] | Fair Value, Inputs, Level 3 [Member] | Minimum [Member] | Valuation technique, discounted cash flow [Member] | Measurement Input, Discount Rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Nonmarketable equity securities, measurement input			10.00%
Recurring [Member] | Nonmarketable equity securities [Member] | Fair Value, Inputs, Level 3 [Member] | Minimum [Member] | Valuation technique, discounted cash flow [Member] | Measurement Input, Price Volatility [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Nonmarketable equity securities, measurement input			0.50%
Recurring [Member] | Nonmarketable equity securities [Member] | Fair Value, Inputs, Level 3 [Member] | Maximum [Member] | Valuation, market approach [Member] | Measurement Input, Comparability Adjustment [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Nonmarketable equity securities, measurement input		(4.30%)	(5.50%)
Recurring [Member] | Nonmarketable equity securities [Member] | Fair Value, Inputs, Level 3 [Member] | Maximum [Member] | Valuation technique, discounted cash flow [Member] | Measurement Input, Discount Rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Nonmarketable equity securities, measurement input			10.00%
Recurring [Member] | Nonmarketable equity securities [Member] | Fair Value, Inputs, Level 3 [Member] | Maximum [Member] | Valuation technique, discounted cash flow [Member] | Measurement Input, Price Volatility [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Nonmarketable equity securities, measurement input			1.90%
Recurring [Member] | Nonmarketable equity securities [Member] | Fair Value, Inputs, Level 3 [Member] | Weighted Average [Member] | Valuation, market approach [Member] | Measurement Input, Comparability Adjustment [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Nonmarketable equity securities, measurement input		(15.80%)	(15.00%)
Recurring [Member] | Nonmarketable equity securities [Member] | Fair Value, Inputs, Level 3 [Member] | Weighted Average [Member] | Valuation technique, discounted cash flow [Member] | Measurement Input, Discount Rate [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Nonmarketable equity securities, measurement input			10.00%
Recurring [Member] | Nonmarketable equity securities [Member] | Fair Value, Inputs, Level 3 [Member] | Weighted Average [Member] | Valuation technique, discounted cash flow [Member] | Measurement Input, Price Volatility [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Nonmarketable equity securities, measurement input			1.40%
[1]	(3)Parenthetical amounts represent assets and liabilities that we are required to carry at fair value or have elected the fair value option.
[2]	(2)Financial information for the prior period has been revised to reflect presentation changes in connection with our 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 Recorded at

Fair Value, Assets Recorded at Fair Value on Nonrecurring Basis (Details) - USD ($) $ in Millions		Dec. 31, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage loans held for sale	[1]	$ 11,771	$ 16,116
Loans held for sale		1,469	1,023	[2]
Loans	[1]	244	376
Total other assets		79,850	90,244	[2]
Nonmarketable equity securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Nonmarketable equity securities		5,455	4,867
Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage loans held for sale		2,446	2,979
Loans held for sale		313	108
Loans		686	886
Total other assets		155	338
Total assets recorded at fair value		4,531	4,447
Nonrecurring [Member] | Nonmarketable equity securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Nonmarketable equity securities		931	136
Nonrecurring [Member] | Commercial Portfolio Segment [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans		339	374
Nonrecurring [Member] | Consumer Portfolio Segment [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans		347	512
Nonrecurring [Member] | Level 1 [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
Total other assets		0	0
Total assets recorded at fair value		0	0
Nonrecurring [Member] | Level 1 [Member] | Nonmarketable equity securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Nonmarketable equity securities		0	0
Nonrecurring [Member] | Level 1 [Member] | Commercial Portfolio Segment [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans		0	0
Nonrecurring [Member] | Level 1 [Member] | Consumer Portfolio Segment [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans		0	0
Nonrecurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage loans held for sale		1,213	1,646
Loans held for sale		313	108
Loans		685	876
Total other assets		149	177
Total assets recorded at fair value		3,134	2,807
Nonrecurring [Member] | Level 2 [Member] | Nonmarketable equity securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Nonmarketable equity securities		774	0
Nonrecurring [Member] | Level 2 [Member] | Commercial Portfolio Segment [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans		339	374
Nonrecurring [Member] | Level 2 [Member] | Consumer Portfolio Segment [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans		346	502
Nonrecurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage loans held for sale		1,233	1,333
Loans held for sale		0	0
Loans		1	10
Total other assets		6	161
Total assets recorded at fair value		1,397	1,640
Nonrecurring [Member] | Level 3 [Member] | Nonmarketable equity securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Nonmarketable equity securities		157	136
Nonrecurring [Member] | Level 3 [Member] | Commercial Portfolio Segment [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans		0	0
Nonrecurring [Member] | Level 3 [Member] | Consumer Portfolio Segment [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans		$ 1	10
Nonrecurring [Member] | Fair Value Measured at Net Asset Value Per Share [Member] | Including NAV Investments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Nonmarketable equity securities			$ 6
[1]	(3)Parenthetical amounts represent assets and liabilities that we are required to carry at fair value or have elected the fair value option.
[2]	(2)Financial information for the prior period has been revised to reflect presentation changes in connection with our 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 Value of

Fair Value, Changes in Value of Assets with Nonrecurring Fair Value Adjustments (Details) - Fair Value, Measurements, Nonrecurring [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Fair Value Assets And Liabilities Measured On Nonrecurring Basis Increase (Decrease) [Line Items]
Mortgage loans held for sale (LOCOM)	$ 21	$ 10
Loans held for sale	(39)	(2)
Loans	(505)	(759)
Nonmarketable equity securities	265	(178)
Other assets	(40)	(121)
Total	(298)	(1,050)
Commercial Portfolio Segment [Member]
Fair Value Assets And Liabilities Measured On Nonrecurring Basis Increase (Decrease) [Line Items]
Loans	(221)	(335)
Consumer Portfolio Segment [Member]
Fair Value Assets And Liabilities Measured On Nonrecurring Basis Increase (Decrease) [Line Items]
Loans	$ (284)	$ (424)

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		Dec. 31, 2018	Dec. 31, 2017
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Mortgage loans held for sale	[1]	$ 11,771	$ 16,116
Nonmarketable equity securities [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Nonmarketable equity securities		5,455	4,867
Nonrecurring [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Mortgage loans held for sale		2,446	2,979
Total assets recorded at fair value		4,531	4,447
Nonrecurring [Member] | Nonmarketable equity securities [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Nonmarketable equity securities		931	136
Nonrecurring [Member] | Residential [Member] | Government Insured Or Guaranteed [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Mortgage loans held for sale		1,200	1,300
Nonrecurring [Member] | Residential [Member] | Non Government Insured Or Guaranteed [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Mortgage loans held for sale		$ 27	$ 26
Nonrecurring [Member] | Measurement Input, Default Rate [Member] | Valuation technique, discounted cash flow [Member] | Minimum [Member] | Residential [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Mortgage loans held for sale (residential), measurement input		0.20%	0.10%
Nonrecurring [Member] | Measurement Input, Default Rate [Member] | Valuation technique, discounted cash flow [Member] | Maximum [Member] | Residential [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Mortgage loans held for sale (residential), measurement input		2.30%	4.10%
Nonrecurring [Member] | Measurement Input, Default Rate [Member] | Valuation technique, discounted cash flow [Member] | Weighted Average [Member] | Residential [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Mortgage loans held for sale (residential), measurement input		1.40%	1.70%
Nonrecurring [Member] | Measurement Input, Discount Rate [Member] | Valuation technique, discounted cash flow [Member] | Minimum [Member] | Nonmarketable equity securities [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Nonmarketable equity securities, measurement input		10.50%	5.00%
Nonrecurring [Member] | Measurement Input, Discount Rate [Member] | Valuation technique, discounted cash flow [Member] | Minimum [Member] | Residential [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Mortgage loans held for sale (residential), measurement input		1.50%	1.50%
Nonrecurring [Member] | Measurement Input, Discount Rate [Member] | Valuation technique, discounted cash flow [Member] | Maximum [Member] | Nonmarketable equity securities [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Nonmarketable equity securities, measurement input		10.50%	10.50%
Nonrecurring [Member] | Measurement Input, Discount Rate [Member] | Valuation technique, discounted cash flow [Member] | Maximum [Member] | Residential [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Mortgage loans held for sale (residential), measurement input		8.50%	8.50%
Nonrecurring [Member] | Measurement Input, Discount Rate [Member] | Valuation technique, discounted cash flow [Member] | Weighted Average [Member] | Nonmarketable equity securities [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Nonmarketable equity securities, measurement input		10.50%	10.20%
Nonrecurring [Member] | Measurement Input, Discount Rate [Member] | Valuation technique, discounted cash flow [Member] | Weighted Average [Member] | Residential [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Mortgage loans held for sale (residential), measurement input		4.00%	3.80%
Nonrecurring [Member] | Measurement Input, Loss Severity [Member] | Valuation technique, discounted cash flow [Member] | Minimum [Member] | Residential [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Mortgage loans held for sale (residential), measurement input		0.50%	0.70%
Nonrecurring [Member] | Measurement Input, Loss Severity [Member] | Valuation technique, discounted cash flow [Member] | Maximum [Member] | Residential [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Mortgage loans held for sale (residential), measurement input		66.00%	52.90%
Nonrecurring [Member] | Measurement Input, Loss Severity [Member] | Valuation technique, discounted cash flow [Member] | Weighted Average [Member] | Residential [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Mortgage loans held for sale (residential), measurement input		1.70%	2.20%
Nonrecurring [Member] | Measurement Input, Prepayment Rate [Member] | Valuation technique, discounted cash flow [Member] | Minimum [Member] | Residential [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Mortgage loans held for sale (residential), measurement input		3.50%	5.40%
Nonrecurring [Member] | Measurement Input, Prepayment Rate [Member] | Valuation technique, discounted cash flow [Member] | Maximum [Member] | Residential [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Mortgage loans held for sale (residential), measurement input		100.00%	100.00%
Nonrecurring [Member] | Measurement Input, Prepayment Rate [Member] | Valuation technique, discounted cash flow [Member] | Weighted Average [Member] | Residential [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Mortgage loans held for sale (residential), measurement input		46.50%	50.60%
Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Mortgage loans held for sale		$ 1,233	$ 1,333
Total insignificant level 3 assets		157	185
Total assets recorded at fair value		1,397	1,640
Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member] | Nonmarketable equity securities [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Nonmarketable equity securities		157	136
Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member] | Valuation technique, discounted cash flow [Member] | Nonmarketable equity securities [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Nonmarketable equity securities		7	122
Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member] | Valuation technique, discounted cash flow [Member] | Residential [Member]
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]
Mortgage loans held for sale		$ 1,233	$ 1,333
[1]	(3)Parenthetical amounts represent assets and liabilities that we are required to carry at fair value or have elected the fair value option.

Fair Value, Option, Carrying Am

Fair Value, Option, Carrying Amount (Details) - USD ($) $ in Millions		Dec. 31, 2018	Dec. 31, 2017
Fair Value, Option, Quantitative Disclosures [Line Items]
Mortgage loans held for sale	[1]	$ 11,771	$ 16,116
Loans held for sale		1,469	1,023	[2]
Loans	[1]	244	376
Mortgage loans held for sale [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Mortgage loans held for sale		11,771	16,116
Mortgage loans held for sale, Unpaid principal		11,573	15,827
Loans, Loans held for sale and Mortgage loans held for sale, aggregate difference		198	289
Nonaccrual loans		127	127
Nonaccrual loans, Unpaid principal		158	165
Nonaccrual loans, Aggregate difference		(31)	(38)
Loans 90 days or more past due and still accruing		7	16
Loans 90 days or more past due and still accruing, Unpaid principal		9	21
Loans 90 days or more past due and still accruing, Aggregate difference		(2)	(5)
Loans held for sale [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Loans held for sale		1,469	1,023
Loans held for sale, Unpaid principal		1,536	1,075
Loans, Loans held for sale and Mortgage loans held for sale, aggregate difference		(67)	(52)
Nonaccrual loans		21	34
Nonaccrual loans, Unpaid principal		32	56
Nonaccrual loans, Aggregate difference		(11)	(22)
Loans [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Loans		244	376
Loans, Unpaid principal		274	404
Loans, Loans held for sale and Mortgage loans held for sale, aggregate difference		(30)	(28)
Nonaccrual loans		179	253
Nonaccrual loans, Unpaid principal		208	281
Nonaccrual loans, Aggregate difference		(29)	(28)
Nonmarketable equity securities [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Nonmarketable equity securities		$ 5,455	$ 4,867
[1]	(3)Parenthetical amounts represent assets and liabilities that we are required to carry at fair value or have elected the fair value option.
[2]	(2)Financial information for the prior period has been revised to reflect presentation changes in connection with our 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 Option, Changes in F

Fair Value Option, Changes in Fair Value Included in Earnings (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
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	$ 462	$ 1,229	$ 1,456
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
Mortgage banking noninterest income [Member] | Loans [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	0	0	0
Mortgage banking noninterest income [Member] | Nonmarketable equity securities [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	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
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
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	(1)	45	55
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
Net gains (losses) from trading activities [Member] | Nonmarketable equity securities [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	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	(3)	(9)	(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
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
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
Net gains (losses) from equity securities [Member] | Nonmarketable equity securities [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	683	1,592	(12)
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
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
Other noninterest income [Member] | Loans held for sale [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	1	2	3
Other noninterest income [Member] | Loans [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	(1)	0	(60)
Other noninterest income [Member] | Nonmarketable equity securities [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) on changes in fair value	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

Fair Value, Option, Gains_Losse

Fair Value, Option, Gains/Losses Attributable to Instrument Specific Credit Risk (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (losses) attributable to instrument-specific credit risk	$ (16)	$ 33	$ 58
Mortgage loans held for sale [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (losses) attributable to instrument-specific credit risk	(16)	(12)	3
Loans held for sale [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (losses) attributable to instrument-specific credit risk	$ 0	$ 45	$ 55

Fair Value, Estimates for Finan

Fair Value, Estimates for Financial Instruments Excluding those Recorded at Fair Value on a Recurring Basis (Details) - USD ($) $ in Millions	Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Financial assets
Cash and due from banks	$ 23,551		$ 23,367
Held-to-maturity debt securities	144,788		139,335
Loans	953,110	[1]	956,770	[1]	$ 967,604	$ 916,559	$ 862,551
Financial liabilities
Deposits (3)(5)	1,286,170		1,335,991
Short-term borrowings	105,787		103,256		$ 96,781
Long-term debt	229,044		225,020
Carrying value [Member]
Financial assets
Cash and due from banks	23,551		23,367
Interest-earning deposits with banks	149,736		192,580
Federal funds sold and securities purchased under resale agreements	80,207		80,025
Held-to-maturity debt securities	144,788		139,335
Mortgage loans held for sale	3,355		3,954
Loans held for sale	572		108
Loans	923,703		926,273
Nonmarketable equity securities	5,643		7,136
Total financial assets	1,331,555		1,372,778
Financial liabilities
Deposits (3)(5)	130,645		128,594
Short-term borrowings	105,787		103,256
Long-term debt	229,008		224,981
Total financial liabilities	465,440		456,831
Fair Value Disclosures, Textual [Abstract]
Deposit Liabilities With No Defined or Contractual Maturity	1,200,000		1,200,000
Capital Lease Obligations	36		39
Carrying value [Member] | Finance Leases Financing Receivable [Member]
Financial assets
Loans	19,700		19,400
Carrying value [Member] | Measurement Alternative [Member]
Financial assets
Nonmarketable equity securities	1,700
Carrying value [Member] | Fair Value Measured at Net Asset Value Per Share [Member]
Financial assets
Nonmarketable equity securities			27
Estimated fair value [Member]
Financial assets
Cash and due from banks	23,551		23,367
Interest-earning deposits with banks	149,736		192,580
Federal funds sold and securities purchased under resale agreements	80,207		80,025
Held-to-maturity debt securities	142,115		138,985
Mortgage loans held for sale	3,362		3,958
Loans held for sale	572		108
Loans	917,915		938,335
Nonmarketable equity securities	5,675		7,628
Total financial assets	1,323,133		1,384,986
Financial liabilities
Deposits (3)(5)	130,089		127,914
Short-term borrowings	105,789		103,256
Long-term debt	228,134		230,268
Total financial liabilities	464,012		461,438
Fair Value Disclosures, Textual [Abstract]
Loan Commitments And Standby, Commercial And Similar Letters of Credit	1,000		1,000
Estimated fair value [Member] | Fair Value Measured at Net Asset Value Per Share [Member]
Financial assets
Nonmarketable equity securities			30
Estimated fair value [Member] | Fair Value, Inputs, Level 1 [Member]
Financial assets
Cash and due from banks	23,551		23,367
Interest-earning deposits with banks	149,542		192,455
Federal funds sold and securities purchased under resale agreements	0		1,002
Held-to-maturity debt securities	44,339		44,806
Mortgage loans held for sale	0		0
Loans held for sale	0		0
Loans	0		0
Nonmarketable equity securities	0		0
Total financial assets	217,432		261,630
Financial liabilities
Deposits (3)(5)	0		0
Short-term borrowings	0		0
Long-term debt	0		0
Total financial liabilities	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	194		125
Federal funds sold and securities purchased under resale agreements	80,207		78,954
Held-to-maturity debt securities	97,275		93,694
Mortgage loans held for sale	2,129		2,625
Loans held for sale	572		108
Loans	45,190		51,713
Nonmarketable equity securities	0		23
Total financial assets	225,567		227,242
Financial liabilities
Deposits (3)(5)	107,448		108,146
Short-term borrowings	105,789		103,256
Long-term debt	225,904		227,109
Total financial liabilities	439,141		438,511
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
Held-to-maturity debt securities	501		485
Mortgage loans held for sale	1,233		1,333
Loans held for sale	0		0
Loans	872,725		886,622
Nonmarketable equity securities	5,675		7,605
Total financial assets	880,134		896,114
Financial liabilities
Deposits (3)(5)	22,641		19,768
Short-term borrowings	0		0
Long-term debt	2,230		3,159
Total financial liabilities	$ 24,871		$ 22,927
[1]	(3)Parenthetical amounts represent assets and liabilities that 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	12 Months Ended
	Dec. 31, 2018USD ($)vote$ / sharesshares	Dec. 31, 2017USD ($)$ / sharesshares
Detail of Preferred Stock [Abstract]
Preferred Stock Shares authorized and designated | shares	9,586,770	12,036,414
ESOP Liquidation preference per share (in dollars per share) | $ / shares	$ 0	$ 0
ESOP Shares authorized and designated | shares	1,406,460	1,556,104
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Shares issued and outstanding | shares	9,377,216	11,677,235
Voting Rights	If issued, preference shares would be limited to one vote per share
Carrying value	$ 23,214	$ 25,358
Discount	$ 1,244	$ 1,399
ESOP Shares issued and outstanding | shares	1,406,460	1,556,104
ESOP Liquidation preference value	$ 1,407	$ 1,556
ESOP Carrying value	1,407	1,556
ESOP Discount	0	0
Preferred stock, par or stated value	$ 24,458	$ 26,757
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]
Class of Stock [Line Items]
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%
Detail of Preferred Stock [Abstract]
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]
Class of Stock [Line Items]
Preferred Stock, Dividend Payment Rate, Variable	three-month LIBOR plus 3.77%
Detail of Preferred Stock [Abstract]
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	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Class of Stock [Line Items]
Additional paid-in capital included related to preferred stock	$ 95	$ 122
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]
Shares issued and outstanding	1,406,460	1,556,104
Carrying value	$ 1,407	$ 1,556
Unearned ESOP shares	$ (1,502)	$ (1,678)
Employee Stock Ownership Plan Preferred Stock 2018 [Member]
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]
Shares issued and outstanding	336,945	0
Carrying value	$ 337	$ 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

Common Stock and Stock Plans Te

Common Stock and Stock Plans Textuals (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Oct. 29, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, shares authorized	9,000,000,000	9,000,000,000
Common Stock and Stock Plans (Textual) [Abstract]
Total number of shares of common stock available for grant under plans	92,000,000
RSR [Member]
Common Stock and Stock Plans (Textual) [Abstract]
Unrecognized compensation cost related to nonvested awards	$ 0
Restricted Share Rights [Member]
Common Stock and Stock Plans (Textual) [Abstract]
Granted, weighted-average grant-date fair value	$ 58.47	$ 57.54	$ 48.31
Unrecognized compensation cost related to nonvested awards	$ 1,100
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	28,023,158
Expected weighted-average period to recognize compensation costs related to awards	2 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value	$ 824	$ 865	$ 1,100
Broad-based RSRs [Member]
Common Stock and Stock Plans (Textual) [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	11,900,000
LTICP performance shares [Member]
Common Stock and Stock Plans (Textual) [Abstract]
Unrecognized compensation cost related to nonvested awards	$ 0
Performance Shares [Member]
Common Stock and Stock Plans (Textual) [Abstract]
Granted, weighted-average grant-date fair value	$ 58.62	$ 57.14	$ 44.73
Unrecognized compensation cost related to nonvested awards	$ 26
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	2,570,300
Expected weighted-average period to recognize compensation costs related to awards	1 year 6 months
Fair value of awards vested	$ 107	$ 117	$ 220
Performance period	3 years
Future vesting amount, minimum (percent)	0.00%
Future vesting amount option one, maximum (percent)	125.00%
Future vesting amount option two, maximum (percent)	150.00%
Stock Options [Member]
Common Stock and Stock Plans (Textual) [Abstract]
Total intrinsic value of options exercised	$ 375	623	546
Cash received from exercise of options	$ 227	$ 602	$ 893
TARP CPP [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, shares authorized	110,261,688
Class of Warrant or Right, Exercise Price of Warrants or Rights	$ 34.01
Unexercised warrants				110,646
Common Stock and Stock Plans (Textual) [Abstract]
Warrants exercised to purchase common stock	23,217,208	9,774,052
Long-Term Incentive Compensation Plans [Member] | Stock Options [Member]
Common Stock and Stock Plans (Textual) [Abstract]
Award expiration period	10 years
Long-Term Incentive Compensation Plans [Member] | Minimum [Member] | Restricted Share Rights [Member]
Common Stock and Stock Plans (Textual) [Abstract]
Award vesting period	3 years
Long-Term Incentive Compensation Plans [Member] | Maximum [Member] | Restricted Share Rights [Member]
Common Stock and Stock Plans (Textual) [Abstract]
Award vesting period	5 years
Options granted prior to 2011 [Member] | Long-Term Incentive Compensation Plans [Member] | Director Awards [Member]
Common Stock and Stock Plans (Textual) [Abstract]
Award expiration period	10 years
Award vesting period	12 months

Common Stock and Stock Plans, C

Common Stock and Stock Plans, Common Stock Shares Reserved, Issued and Authorized (Details) - shares	Dec. 31, 2018	Dec. 31, 2017
Reserved, Issued and Authorized Common Stock [Abstract]
Total shares reserved	445,291,162
Shares issued	5,481,811,474	5,481,811,474
Shares not reserved or issued	3,072,897,364
Total shares authorized	9,000,000,000	9,000,000,000
Dividend Reinvestment and Common Stock Purchase Plans [Member]
Reserved, Issued and Authorized Common Stock [Abstract]
Total shares reserved	9,114,931
Director Awards [Member]
Reserved, Issued and Authorized Common Stock [Abstract]
Total shares reserved	447,526
Stock Plan [Member]
Reserved, Issued and Authorized Common Stock [Abstract]
Total shares reserved	369,893,237
Convertible Securities And Warrants [Member]
Reserved, Issued and Authorized Common Stock [Abstract]
Total shares reserved	65,835,468

Common Stock and Stock Plans, S

Common Stock and Stock Plans, Stock Incentive Compensation Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2015
Allocation of Stock Incentive Compensation Expense and Related Recognized Tax Benefit [Abstract]
RSRs (1)	$ 1,013	$ 743	$ 692
Performance shares	9	112	87
Stock or Unit Option Plan Expense	0	(6)	0
Share-based Compensation	1,022	849	779
Related recognized tax benefit	252	320	$ 294
Expense credits/claw backs on prior awards	$ 19	$ 26

Common Stock and Stock Plans,_2

Common Stock and Stock Plans, Summary of Restricted Share Rights and Restricted Share Awards (Details) - Restricted Share Rights [Member] - $ / shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Summary of Restricted Share Rights and Restricted Share Awards [Abstract]
Nonvested at January 1, 2018 (in shares)	34,894,376
Granted (in shares)	28,023,158
Vested (in shares)	(14,571,562)
Canceled or forfeited (in shares)	(2,773,474)
Nonvested at December 31, 2018 (in shares)	45,572,498	34,894,376
Weighted- average grant-date fair value
Nonvested at January 1, 2018 (in dollars per share)	$ 50.95
Granted (in dollars per share)	58.47	$ 57.54	$ 48.31
Vested (in dollars per share)	52.12
Canceled or forfeited (in dollars per share)	56.76
Nonvested at December 31, 2018 (in dollars per share)	$ 54.85	$ 50.95

Common Stock and Stock Plans,_3

Common Stock and Stock Plans, Summary of Performance Awards (Details) - Performance Shares [Member] - $ / shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Summary of Performance Awards [Abstract]
Nonvested at January 1, 2018 (in shares)	5,492,104
Granted (in shares)	2,570,300
Vested (in shares)	(1,879,523)
Canceled or forfeited (in shares)	(198,195)
Nonvested at December 31, 2018 (in shares)	5,984,686	5,492,104
Weighted- average grant-date fair value
Nonvested at January 1, 2018 (in dollars per share)	$ 47.81
Granted (in dollars per share)	58.62	$ 57.14	$ 44.73
Vested (in dollars per share)	55.21
Canceled or forfeited (in dollars per share)	54.48
Nonvested at December 31, 2018 (in dollars per share)	$ 49.91	$ 47.81

Common Stock and Stock Plans,_4

Common Stock and Stock Plans, Stock Option Plans (Details) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2018USD ($)$ / sharesshares
Incentive Compensation Plans [Member]
Summary of Stock Options
Options outstanding as of December 31, 2017 (in shares) | shares	20,179,179
Canceled or forfeited (in shares) | shares	(1,886,251)
Exercised (in shares) | shares	(9,949,771)
Options exercisable and outstanding as of December 31, 2018 (in shares) | shares	8,343,157
Employee Stock Options [Abstract]
Options outstanding, weighted-average remaining contractual term (in yrs.)	2 months 13 days
Options outstanding, aggregate intrinsic value | $	$ 272
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Options outstanding as of December 31, 2017 (in dollars per share) | $ / shares	$ 32.80
Canceled or forfeited (in dollars per share) | $ / shares	172.36
Exercised (in dollars per share) | $ / shares	22.50
Options outstanding as of December 31, 2018 (in dollars per share) | $ / shares	$ 13.46
Director Awards [Member]
Summary of Stock Options
Options outstanding as of December 31, 2017 (in shares) | shares	104,900
Exercised (in shares) | shares	(104,900)
Options exercisable and outstanding as of December 31, 2018 (in shares) | shares	0
Employee Stock Options [Abstract]
Options outstanding, weighted-average remaining contractual term (in yrs.)	0 years
Options outstanding, aggregate intrinsic value | $	$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Options outstanding as of December 31, 2017 (in dollars per share) | $ / shares	$ 29.87
Exercised (in dollars per share) | $ / shares	29.88
Options outstanding as of December 31, 2018 (in dollars per share) | $ / shares	$ 0

Common Stock and Stock Plans, E

Common Stock and Stock Plans, Employee Stock Ownership Plan (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Common stock [Member]
Employee Stock Ownership Plan [Abstract]
Allocated shares (common)	138,182,911	124,670,717	128,189,305
Dividends paid to ESOP	$ 213	$ 195	$ 208
Preferred stock [Member]
Employee Stock Ownership Plan [Abstract]
Unreleased shares (preferred)	1,406,460	1,556,104	1,439,181
Fair value of unreleased ESOP preferred shares	$ 1,407	$ 1,556	$ 1,439
Dividends paid to ESOP	$ 159	$ 166	$ 169

Revenue from Contracts with C_3

Revenue from Contracts with Customers Revenue from Contracts with Customers (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017		Dec. 31, 2016		Jan. 01, 2018
Segment Reporting, Revenue Reconciling Item [Line Items]
Net interest Income	$ 49,995	$ 49,557		$ 47,754
Mortgage banking	3,017	4,350		6,096
Insurance	429	1,049		1,268
Net gains from trading activities (1)	602	542	[1]	610	[1]
Net gains (losses) on debt securities	108	479		942
Net gains from equity investments	1,515	1,779		1,103
Lease income	1,753	1,907		1,927
Other income of the segment	2,473	1,603		1,289
Total noninterest income	36,413	38,832		40,513
Revenue	86,408	88,389		88,267
Service charges on deposit accounts
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	4,716	5,111		5,372
Trust and investment fees
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	14,509	14,495		14,243
Brokerage advisory, commissions and other fees
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	9,436	9,358		9,216
Trust and investment management
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	3,316	3,372		3,336
Investment banking
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	1,757	1,765		1,691
Card fees
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	3,907	3,960		3,936
Other fees
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	3,384	3,557		3,727
Lending related charges and fees [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	1,526	1,568		1,562
Cash network fees [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	481	506		537
Commercial real estate brokerage commissions [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	468	462		494
Wire transfer and other remittance fees [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	477	448		401
All other fees [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	432	573		733
Other [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Net interest Income	(2,355)	(2,552)		(2,527)
Mortgage banking	7	7		6
Insurance	(48)	(50)		0
Net gains from trading activities (1)	1	0		0
Net gains (losses) on debt securities	0	0		0
Net gains from equity investments	0	0		0
Lease income	0	0		0
Other income of the segment	(301)	(308)		(263)
Total noninterest income	(3,232)	(3,149)		(3,044)
Revenue	(5,587)	(5,701)		(5,571)
Other [Member] | Service charges on deposit accounts
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	(15)	(16)		(18)
Other [Member] | Trust and investment fees
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	(2,861)	(2,766)		(2,753)
Other [Member] | Brokerage advisory, commissions and other fees
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	(1,929)	(1,848)		(1,876)
Other [Member] | Trust and investment management
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	(932)	(917)		(877)
Other [Member] | Investment banking
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	0	(1)		0
Other [Member] | Card fees
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	(4)	(4)		(4)
Other [Member] | Other fees
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	(11)	(12)		(12)
Other [Member] | Lending related charges and fees [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	(6)	(8)		(8)
Other [Member] | Cash network fees [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	0	0		0
Other [Member] | Commercial real estate brokerage commissions [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	0	0		0
Other [Member] | Wire transfer and other remittance fees [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	(4)	(4)		(4)
Other [Member] | All other fees [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	(1)	0		0
Community Banking [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Net interest Income	29,219	28,658		27,333
Mortgage banking	2,659	3,895		5,624
Insurance	83	139		112
Net gains from trading activities (1)	28	(251)		(148)
Net gains (losses) on debt securities	(3)	709		933
Net gains from equity investments	1,505	1,455		804
Lease income	0	0		0
Other income of the segment	3,117	1,734		948
Total noninterest income	17,694	18,360		19,180
Revenue	46,913	47,018		46,513
Community Banking [Member] | Service charges on deposit accounts
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	2,641	2,909		3,111
Community Banking [Member] | Trust and investment fees
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	2,762	2,660		2,562
Community Banking [Member] | Brokerage advisory, commissions and other fees
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	1,887	1,830		1,854
Community Banking [Member] | Trust and investment management
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	910	889		849
Community Banking [Member] | Investment banking
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	(35)	(59)		(141)
Community Banking [Member] | Card fees
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	3,543	3,613		3,598
Community Banking [Member] | Other fees
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	1,359	1,497		1,636
Community Banking [Member] | Lending related charges and fees [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	278	311		364
Community Banking [Member] | Cash network fees [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	478	498		528
Community Banking [Member] | Commercial real estate brokerage commissions [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	0	1		0
Community Banking [Member] | Wire transfer and other remittance fees [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	264	239		219
Community Banking [Member] | All other fees [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	339	448		525
Wholesale Banking [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Net interest Income	18,690	18,810		18,699
Mortgage banking	362	458		475
Insurance	312	872		1,156
Net gains from trading activities (1)	516	701		677
Net gains (losses) on debt securities	102	(232)		8
Net gains from equity investments	293	116		199
Lease income	1,753	1,907		1,927
Other income of the segment	(322)	114		551
Total noninterest income	10,016	11,190		12,348
Revenue	28,706	30,000		31,047
Wholesale Banking [Member] | Service charges on deposit accounts
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	2,074	2,201		2,260
Wholesale Banking [Member] | Trust and investment fees
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	2,545	2,654		2,674
Wholesale Banking [Member] | Brokerage advisory, commissions and other fees
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	317	304		368
Wholesale Banking [Member] | Trust and investment management
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	445	523		473
Wholesale Banking [Member] | Investment banking
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	1,783	1,827		1,833
Wholesale Banking [Member] | Card fees
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	362	345		336
Wholesale Banking [Member] | Other fees
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	2,019	2,054		2,085
Wholesale Banking [Member] | Lending related charges and fees [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	1,247	1,257		1,198
Wholesale Banking [Member] | Cash network fees [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	3	8		9
Wholesale Banking [Member] | Commercial real estate brokerage commissions [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	468	461		494
Wholesale Banking [Member] | Wire transfer and other remittance fees [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	209	204		178
Wholesale Banking [Member] | All other fees [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	92	124		206
Wealth And Investment Management [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Net interest Income	4,441	4,641		4,249
Mortgage banking	(11)	(10)		(9)
Insurance	82	88		0
Net gains from trading activities (1)	57	92		81
Net gains (losses) on debt securities	9	2		1
Net gains from equity investments	(283)	208		100
Lease income	0	0		0
Other income of the segment	(21)	63		53
Total noninterest income	11,935	12,431		12,029
Revenue	16,376	17,072		16,278
Wealth And Investment Management [Member] | Service charges on deposit accounts
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	16	17		19
Wealth And Investment Management [Member] | Trust and investment fees
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	12,063	11,947		11,760
Wealth And Investment Management [Member] | Brokerage advisory, commissions and other fees
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	9,161	9,072		8,870
Wealth And Investment Management [Member] | Trust and investment management
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	2,893	2,877		2,891
Wealth And Investment Management [Member] | Investment banking
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	9	(2)		(1)
Wealth And Investment Management [Member] | Card fees
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	6	6		6
Wealth And Investment Management [Member] | Other fees
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	17	18		18
Wealth And Investment Management [Member] | Lending related charges and fees [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	7	8		8
Wealth And Investment Management [Member] | Cash network fees [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	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
Wealth And Investment Management [Member] | Wire transfer and other remittance fees [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	8	9		8
Wealth And Investment Management [Member] | All other fees [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Fee income	$ 2	$ 1		$ 2
Accounting Standards Update 2014-09 [Member] | Retained earnings [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Cumulative effect from change in accounting principle						$ (32)
[1]	(1)Financial information for the prior periods has been revised to reflect presentation changes made in connection with our 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 Revenue from Contracts with Customers, Disaggregation of Revenue (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Service charges on deposit accounts
Disaggregation of Revenue [Line Items]
Fee income	$ 4,716	$ 5,111	$ 5,372
Overdraft fees
Disaggregation of Revenue [Line Items]
Fee income	1,782	1,948	2,030
Account charges
Disaggregation of Revenue [Line Items]
Fee income	2,934	3,163	3,342
Brokerage advisory, commissions and other fees
Disaggregation of Revenue [Line Items]
Fee income	9,436	9,358	9,216
Asset-based revenue (1)
Disaggregation of Revenue [Line Items]
Fee income	6,898	6,632	6,168
Trailing commissions
Disaggregation of Revenue [Line Items]
Fee income	1,300	1,300	1,300
Transactional revenue
Disaggregation of Revenue [Line Items]
Fee income	1,648	1,824	2,064
Other revenue
Disaggregation of Revenue [Line Items]
Fee income	890	902	984
Trust and investment management
Disaggregation of Revenue [Line Items]
Fee income	3,316	3,372	3,336
Investment management fees
Disaggregation of Revenue [Line Items]
Fee income	2,087	2,054	2,079
Trust fees
Disaggregation of Revenue [Line Items]
Fee income	1,033	1,149	1,109
Other revenue
Disaggregation of Revenue [Line Items]
Fee income	196	169	148
Card fees
Disaggregation of Revenue [Line Items]
Fee income	3,907	3,960	3,936
Credit card interchange and network revenues (1)
Disaggregation of Revenue [Line Items]
Fee income	1,155	1,291	1,290
Credit card rewards and rebates
Disaggregation of Revenue [Line Items]
Credit card rewards and rebates	1,401	1,201	1,047
Debit card interchange and network revenues
Disaggregation of Revenue [Line Items]
Fee income	2,053	1,964	1,896
Late fees, cash advance fees, balance transfer fees, and annual fees
Disaggregation of Revenue [Line Items]
Fee income	699	705	750
Other [Member] | Service charges on deposit accounts
Disaggregation of Revenue [Line Items]
Fee income	(15)	(16)	(18)
Other [Member] | Overdraft fees
Disaggregation of Revenue [Line Items]
Fee income	0	0	0
Other [Member] | Account charges
Disaggregation of Revenue [Line Items]
Fee income	(15)	(16)	(18)
Other [Member] | Brokerage advisory, commissions and other fees
Disaggregation of Revenue [Line Items]
Fee income	(1,929)	(1,848)	(1,876)
Other [Member] | Asset-based revenue (1)
Disaggregation of Revenue [Line Items]
Fee income	(1,484)	(1,371)	(1,241)
Other [Member] | Transactional revenue
Disaggregation of Revenue [Line Items]
Fee income	(380)	(400)	(477)
Other [Member] | Other revenue
Disaggregation of Revenue [Line Items]
Fee income	(65)	(77)	(158)
Other [Member] | Trust and investment management
Disaggregation of Revenue [Line Items]
Fee income	(932)	(917)	(877)
Other [Member] | Investment management fees
Disaggregation of Revenue [Line Items]
Fee income	0	0	0
Other [Member] | Trust fees
Disaggregation of Revenue [Line Items]
Fee income	(932)	(916)	(875)
Other [Member] | Other revenue
Disaggregation of Revenue [Line Items]
Fee income	0	(1)	(2)
Other [Member] | Card fees
Disaggregation of Revenue [Line Items]
Fee income	(4)	(4)	(4)
Other [Member] | Credit card interchange and network revenues (1)
Disaggregation of Revenue [Line Items]
Fee income	(4)	(4)	(4)
Other [Member] | Debit card interchange and network revenues
Disaggregation of Revenue [Line Items]
Fee income	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
Community Banking [Member] | Service charges on deposit accounts
Disaggregation of Revenue [Line Items]
Fee income	2,641	2,909	3,111
Community Banking [Member] | Overdraft fees
Disaggregation of Revenue [Line Items]
Fee income	1,776	1,941	2,024
Community Banking [Member] | Account charges
Disaggregation of Revenue [Line Items]
Fee income	865	968	1,087
Community Banking [Member] | Brokerage advisory, commissions and other fees
Disaggregation of Revenue [Line Items]
Fee income	1,887	1,830	1,854
Community Banking [Member] | Asset-based revenue (1)
Disaggregation of Revenue [Line Items]
Fee income	1,482	1,372	1,243
Community Banking [Member] | Transactional revenue
Disaggregation of Revenue [Line Items]
Fee income	340	382	454
Community Banking [Member] | Other revenue
Disaggregation of Revenue [Line Items]
Fee income	65	76	157
Community Banking [Member] | Trust and investment management
Disaggregation of Revenue [Line Items]
Fee income	910	889	849
Community Banking [Member] | Investment management fees
Disaggregation of Revenue [Line Items]
Fee income	0	1	0
Community Banking [Member] | Trust fees
Disaggregation of Revenue [Line Items]
Fee income	908	887	847
Community Banking [Member] | Other revenue
Disaggregation of Revenue [Line Items]
Fee income	2	1	2
Community Banking [Member] | Card fees
Disaggregation of Revenue [Line Items]
Fee income	3,543	3,613	3,598
Community Banking [Member] | Credit card interchange and network revenues (1)
Disaggregation of Revenue [Line Items]
Fee income	792	944	959
Community Banking [Member] | Debit card interchange and network revenues
Disaggregation of Revenue [Line Items]
Fee income	2,053	1,964	1,889
Community Banking [Member] | Late fees, cash advance fees, balance transfer fees, and annual fees
Disaggregation of Revenue [Line Items]
Fee income	698	705	750
Wholesale Banking [Member] | Service charges on deposit accounts
Disaggregation of Revenue [Line Items]
Fee income	2,074	2,201	2,260
Wholesale Banking [Member] | Overdraft fees
Disaggregation of Revenue [Line Items]
Fee income	5	6	6
Wholesale Banking [Member] | Account charges
Disaggregation of Revenue [Line Items]
Fee income	2,069	2,195	2,254
Wholesale Banking [Member] | Brokerage advisory, commissions and other fees
Disaggregation of Revenue [Line Items]
Fee income	317	304	368
Wholesale Banking [Member] | Asset-based revenue (1)
Disaggregation of Revenue [Line Items]
Fee income	1	1	2
Wholesale Banking [Member] | Transactional revenue
Disaggregation of Revenue [Line Items]
Fee income	70	40	55
Wholesale Banking [Member] | Other revenue
Disaggregation of Revenue [Line Items]
Fee income	246	263	311
Wholesale Banking [Member] | Trust and investment management
Disaggregation of Revenue [Line Items]
Fee income	445	523	473
Wholesale Banking [Member] | Investment management fees
Disaggregation of Revenue [Line Items]
Fee income	0	0	0
Wholesale Banking [Member] | Trust fees
Disaggregation of Revenue [Line Items]
Fee income	329	421	399
Wholesale Banking [Member] | Other revenue
Disaggregation of Revenue [Line Items]
Fee income	116	102	74
Wholesale Banking [Member] | Card fees
Disaggregation of Revenue [Line Items]
Fee income	362	345	336
Wholesale Banking [Member] | Credit card interchange and network revenues (1)
Disaggregation of Revenue [Line Items]
Fee income	361	345	329
Wholesale Banking [Member] | Debit card interchange and network revenues
Disaggregation of Revenue [Line Items]
Fee income	0	0	7
Wholesale Banking [Member] | Late fees, cash advance fees, balance transfer fees, and annual fees
Disaggregation of Revenue [Line Items]
Fee income	1	0	0
Wealth And Investment Management [Member] | Service charges on deposit accounts
Disaggregation of Revenue [Line Items]
Fee income	16	17	19
Wealth And Investment Management [Member] | Overdraft fees
Disaggregation of Revenue [Line Items]
Fee income	1	1	0
Wealth And Investment Management [Member] | Account charges
Disaggregation of Revenue [Line Items]
Fee income	15	16	19
Wealth And Investment Management [Member] | Brokerage advisory, commissions and other fees
Disaggregation of Revenue [Line Items]
Fee income	9,161	9,072	8,870
Wealth And Investment Management [Member] | Asset-based revenue (1)
Disaggregation of Revenue [Line Items]
Fee income	6,899	6,630	6,164
Wealth And Investment Management [Member] | Transactional revenue
Disaggregation of Revenue [Line Items]
Fee income	1,618	1,802	2,032
Wealth And Investment Management [Member] | Other revenue
Disaggregation of Revenue [Line Items]
Fee income	644	640	674
Wealth And Investment Management [Member] | Trust and investment management
Disaggregation of Revenue [Line Items]
Fee income	2,893	2,877	2,891
Wealth And Investment Management [Member] | Investment management fees
Disaggregation of Revenue [Line Items]
Fee income	2,087	2,053	2,079
Wealth And Investment Management [Member] | Trust fees
Disaggregation of Revenue [Line Items]
Fee income	728	757	738
Wealth And Investment Management [Member] | Other revenue
Disaggregation of Revenue [Line Items]
Fee income	78	67	74
Wealth And Investment Management [Member] | Card fees
Disaggregation of Revenue [Line Items]
Fee income	6	6	6
Wealth And Investment Management [Member] | Credit card interchange and network revenues (1)
Disaggregation of Revenue [Line Items]
Fee income	6	6	6
Wealth And Investment Management [Member] | Debit card interchange and network revenues
Disaggregation of Revenue [Line Items]
Fee income	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

Employee Benefits, Changes in B

Employee Benefits, Changes in Benefit Obligation and Fair Value of Plan Assets (Details) - USD ($) $ in Millions	12 Months Ended			120 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2018
Cash Balance Plan [Member]
Change in plan assets:
Employer contribution	$ 0
Employee Benefits and Other Expenses Textual [Abstract]
Net periodic benefit cost (income)				$ 0
Pension benefits [Member]
Change in plan assets:
Fair value of plan assets at beginning of year	10,656
Fair value of plan assets at end of year	9,429	$ 10,656		9,429
Pension benefits qualified [Member]
Change in benefit obligation:
Benefit obligation at beginning of year	11,110	10,774
Service cost	11	5	$ 3
Interest cost	392	412	422
Plan participants’ contributions	0	0
Actuarial loss (gain)	(674)	634
Benefits paid	(719)	(651)
Medicare Part D subsidy	0	0
Amendment	1	0
Settlement	0	(74)
Liability transfer in	13	0
Foreign exchange impact	(5)	10
Benefit obligation at end of year	10,129	11,110	10,774	10,129
Change in plan assets:
Fair value of plan assets at beginning of year	10,667	10,120
Actual return on plan assets	(478)	1,253
Employer contribution	10	11
Plan participants’ contributions	0	0
Benefits paid	(719)	(651)
Medicare Part D subsidy	0	0
Settlement	0	(74)
Asset transfer in	1	0
Foreign exchange impact	(4)	8
Fair value of plan assets at end of year	9,477	10,667	10,120	9,477
Funded status at end of year	(652)	(443)		(652)
Assets recognized on the balance sheet at end of year	1	0		1
Liability recognized on the balance sheet at end of year	(653)	(443)		(653)
Employee Benefits and Other Expenses Textual [Abstract]
Net periodic benefit cost (income)	27	(80)	(32)
Settlement loss	134	7	5
Pension benefits qualified [Member] | Cash Balance Plan [Member]
Employee Benefits and Other Expenses Textual [Abstract]
Settlement loss	134
Pension benefits qualified [Member] | Pension and Life Assurance Plan of Wachovia Bank [Member]
Change in plan assets:
Settlement		(74)
Employee Benefits and Other Expenses Textual [Abstract]
Settlement loss		7
Pension benefits nonqualified [Member]
Change in benefit obligation:
Benefit obligation at beginning of year	621	630
Service cost	0	0	0
Interest cost	21	24	26
Plan participants’ contributions	0	0
Actuarial loss (gain)	(27)	46
Benefits paid	(57)	(79)
Medicare Part D subsidy	0	0
Amendment	0	0
Settlement	0	0
Liability transfer in	0	0
Foreign exchange impact	(1)	0
Benefit obligation at end of year	557	621	630	557
Change in plan assets:
Fair value of plan assets at beginning of year	0	0
Actual return on plan assets	0	0
Employer contribution	57	79
Plan participants’ contributions	0	0
Benefits paid	(57)	(79)
Medicare Part D subsidy	0	0
Settlement	0	0
Asset transfer in	0	0
Foreign exchange impact	0	0
Fair value of plan assets at end of year	0	0	0	0
Funded status at end of year	(557)	(621)		(557)
Assets recognized on the balance sheet at end of year	0	0		0
Liability recognized on the balance sheet at end of year	(557)	(621)		(557)
Employee Benefits and Other Expenses Textual [Abstract]
Net periodic benefit cost (income)	37	41	40
Settlement loss	2	6	2
Other benefits [Member]
Change in benefit obligation:
Benefit obligation at beginning of year	611	731
Service cost	0	0	0
Interest cost	21	28	39
Plan participants’ contributions	48	40
Actuarial loss (gain)	(33)	(102)
Benefits paid	(92)	(88)
Medicare Part D subsidy	2	1
Amendment	0	0
Settlement	0	0
Liability transfer in	0	0
Foreign exchange impact	(2)	1
Benefit obligation at end of year	555	611	731	555
Change in plan assets:
Fair value of plan assets at beginning of year	565	549
Actual return on plan assets	(17)	56
Employer contribution	5	7
Plan participants’ contributions	48	40
Benefits paid	(92)	(88)
Medicare Part D subsidy	2	1
Settlement	0	0
Asset transfer in	0	0
Foreign exchange impact	0	0
Fair value of plan assets at end of year	511	565	549	511
Funded status at end of year	(44)	(46)		(44)
Assets recognized on the balance sheet at end of year	0	0		0
Liability recognized on the balance sheet at end of year	(44)	(46)		$ (44)
Employee Benefits and Other Expenses Textual [Abstract]
Net periodic benefit cost (income)	(38)	(21)	2
Settlement loss	$ 0	$ 0	$ 0

Employee Benefits, Pension Plan

Employee Benefits, Pension Plans With Benefit Obligations in Excess of Plan Assets (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Pension benefits [Member]
Pension Plans Information with Benefit Obligations in Excess of Plan Assets [Abstract]
Projected benefit obligation	$ 10,640	$ 11,721
Accumulated benefit obligation	10,627	11,717
Fair value of plan assets	9,429	10,656
Other benefits [Member]
Pension Plans Information with Benefit Obligations in Excess of Plan Assets [Abstract]
Accumulated benefit obligation	555	611
Fair value of plan assets	$ 511	$ 565	$ 549

Employee Benefits, Net Periodic

Employee Benefits, Net Periodic Benefit Cost and Other Comprehensive Income (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Other changes in plan assets and benefit obligations recognized in other comprehensive income:
Net actuarial loss (gain)	$ 434	$ (49)	$ 52
Amortization of net actuarial gain (loss)	(127)	(150)	(153)
Total recognized in other comprehensive income	181	(202)	(106)
Pension benefits qualified [Member]
Components of net periodic benefit cost [Abstract]
Service cost	11	5	3
Interest cost (1)	392	412	422
Expected return on plan assets (1)	(641)	(652)	(608)
Amortization of net actuarial loss (gain) (1)	131	148	146
Amortization of prior service credit (1)	0	0	0
Settlement loss	134	7	5
Net periodic benefit cost	27	(80)	(32)
Other changes in plan assets and benefit obligations recognized in other comprehensive income:
Net actuarial loss (gain)	445	33	302
Amortization of net actuarial gain (loss)	(131)	(148)	(146)
Prior service cost (credit) (2)	1	1	0
Amortization of prior service credit	0	0	0
Settlement	(134)	(8)	(5)
Total recognized in other comprehensive income	181	(122)	151
Total recognized in net periodic benefit cost and other comprehensive income	208	(202)	119
Pension benefits nonqualified [Member]
Components of net periodic benefit cost [Abstract]
Service cost	0	0	0
Interest cost (1)	21	24	26
Expected return on plan assets (1)	0	0	0
Amortization of net actuarial loss (gain) (1)	14	11	12
Amortization of prior service credit (1)	0	0	0
Settlement loss	2	6	2
Net periodic benefit cost	37	41	40
Other changes in plan assets and benefit obligations recognized in other comprehensive income:
Net actuarial loss (gain)	(27)	46	9
Amortization of net actuarial gain (loss)	(14)	(11)	(12)
Prior service cost (credit) (2)	0	0	0
Amortization of prior service credit	0	0	0
Settlement	(2)	(6)	(2)
Total recognized in other comprehensive income	(43)	29	(5)
Total recognized in net periodic benefit cost and other comprehensive income	(6)	70	35
Other benefits [Member]
Components of net periodic benefit cost [Abstract]
Service cost	0	0	0
Interest cost (1)	21	28	39
Expected return on plan assets (1)	(31)	(30)	(30)
Amortization of net actuarial loss (gain) (1)	(18)	(9)	(5)
Amortization of prior service credit (1)	(10)	(10)	(2)
Settlement loss	0	0	0
Net periodic benefit cost	(38)	(21)	2
Other changes in plan assets and benefit obligations recognized in other comprehensive income:
Net actuarial loss (gain)	15	(128)	(82)
Amortization of net actuarial gain (loss)	18	9	5
Prior service cost (credit) (2)	0	0	(177)
Amortization of prior service credit	10	10	2
Settlement	0	0	0
Total recognized in other comprehensive income	43	(109)	(252)
Total recognized in net periodic benefit cost and other comprehensive income	$ 5	$ (130)	$ (250)

Employee Benefits, Benefits Rec

Employee Benefits, Benefits Recognized in Cumulative OCI and Weighted-Average Assumptions in Determining Net Periodic Benefit Cost (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Assumed Health Care Cost Trend Rates Textuals [Abstract]
Health care cost trend rate assumed for next fiscal year, projected benefit obligation	8.40%
Ultimate health care cost trend rate, projected benefit obligation	4.50%
Year that rate reaches ultimate health care cost trend rate, projected benefit obligation	2,026
Defined benefit plan health care cost initial annual tend rate assumed for current fiscal year periodic benefit cost	9.00%
Ultimate health care cost trend rate, periodic benefit cost	4.50%
Year that rate reaches ultimate health care cost trend rate, periodic benefit cost	2,026
Pension benefits qualified [Member]
Benefits Recognized in Cumulative Other Comprehensive Income [Abstract]
Net actuarial loss (gain)	$ 3,336	$ 3,156
Net prior service cost (credit)	1	0
Total	$ 3,337	$ 3,156
Defined Benefit Plan, Weighted Average Assumptions Used to Estimate Projected Benefit Obligation [Abstract]
Discount rate	4.30%	3.65%
Interest credit rate	3.22%	2.74%
Weighted Average Assumptions Used to Determine Net Periodic Benefit Cost [Abstract]
Discount rate	3.65%	3.98%	3.99%
Interest crediting rate	2.74%	2.92%	3.03%
Expected return on plan assets	6.24%	6.70%	6.75%
Pension benefits nonqualified [Member]
Benefits Recognized in Cumulative Other Comprehensive Income [Abstract]
Net actuarial loss (gain)	$ 149	$ 192
Net prior service cost (credit)	0	0
Total	$ 149	$ 192
Defined Benefit Plan, Weighted Average Assumptions Used to Estimate Projected Benefit Obligation [Abstract]
Discount rate	4.20%	3.55%
Interest credit rate	2.18%	1.54%
Weighted Average Assumptions Used to Determine Net Periodic Benefit Cost [Abstract]
Discount rate	3.65%	3.93%	4.11%
Interest crediting rate	1.68%	1.85%	2.02%
Other benefits [Member]
Benefits Recognized in Cumulative Other Comprehensive Income [Abstract]
Net actuarial loss (gain)	$ (327)	$ (360)
Net prior service cost (credit)	(156)	(166)
Total	$ (483)	$ (526)
Defined Benefit Plan, Weighted Average Assumptions Used to Estimate Projected Benefit Obligation [Abstract]
Discount rate	4.24%	3.54%
Weighted Average Assumptions Used to Determine Net Periodic Benefit Cost [Abstract]
Discount rate	3.54%	4.00%	4.16%
Expected return on plan assets	5.75%	5.75%	5.75%
Real estate, venture capital, private equity and other investments [Member] | Cash balance plan [Member]
Investment Strategy and Asset Allocation Textuals [Abstract]
Target asset allocation	10.00%
Minimum [Member]
Assumed Health Care Cost Trend Rates Textuals [Abstract]
Decrease in assumed health care cost trend, rate, projected benefit obligation	0.50%
Decrease in assumed health care cost trend, rate, periodic benefit cost	0.40%
Minimum [Member] | Equity securities [Member] | Cash balance plan [Member]
Investment Strategy and Asset Allocation Textuals [Abstract]
Target asset allocation	25.00%
Minimum [Member] | Equity securities [Member] | 401(h) trust [Member]
Investment Strategy and Asset Allocation Textuals [Abstract]
Target asset allocation	40.00%
Minimum [Member] | Equity securities [Member] | VEBA [Member]
Investment Strategy and Asset Allocation Textuals [Abstract]
Target asset allocation	20.00%
Minimum [Member] | Fixed Income Funds [Member] | Cash balance plan [Member]
Investment Strategy and Asset Allocation Textuals [Abstract]
Target asset allocation	45.00%
Minimum [Member] | Fixed Income Funds [Member] | 401(h) trust [Member]
Investment Strategy and Asset Allocation Textuals [Abstract]
Target asset allocation	40.00%
Minimum [Member] | Fixed Income Funds [Member] | VEBA [Member]
Investment Strategy and Asset Allocation Textuals [Abstract]
Target asset allocation	60.00%
Maximum [Member]
Assumed Health Care Cost Trend Rates Textuals [Abstract]
Decrease in assumed health care cost trend, rate, projected benefit obligation	0.60%
Decrease in assumed health care cost trend, rate, periodic benefit cost	0.70%
Maximum [Member] | Equity securities [Member] | Cash balance plan [Member]
Investment Strategy and Asset Allocation Textuals [Abstract]
Target asset allocation	45.00%
Maximum [Member] | Equity securities [Member] | 401(h) trust [Member]
Investment Strategy and Asset Allocation Textuals [Abstract]
Target asset allocation	60.00%
Maximum [Member] | Equity securities [Member] | VEBA [Member]
Investment Strategy and Asset Allocation Textuals [Abstract]
Target asset allocation	40.00%
Maximum [Member] | Fixed Income Funds [Member] | Cash balance plan [Member]
Investment Strategy and Asset Allocation Textuals [Abstract]
Target asset allocation	65.00%
Maximum [Member] | Fixed Income Funds [Member] | 401(h) trust [Member]
Investment Strategy and Asset Allocation Textuals [Abstract]
Target asset allocation	60.00%
Maximum [Member] | Fixed Income Funds [Member] | VEBA [Member]
Investment Strategy and Asset Allocation Textuals [Abstract]
Target asset allocation	80.00%

Employee Benefits, Projected Be

Employee Benefits, Projected Benefits Payments (Details) $ in Millions	Dec. 31, 2018USD ($)
Pension benefits qualified [Member]
Future Benefit Payments:
2,019	$ 784
2,020	771
2,021	767
2,022	759
2,023	711
2024-2028	3,381
Pension benefits nonqualified [Member]
Future Benefit Payments:
2,019	52
2,020	50
2,021	49
2,022	46
2,023	44
2024-2028	199
Other benefits [Member]
Future Benefit Payments:
2,019	46
2,020	48
2,021	48
2,022	47
2,023	46
2024-2028	$ 198

Employee Benefits, Pension and

Employee Benefits, Pension and Other Benefit Plan Assets (Details) $ in Millions	12 Months Ended
	Dec. 31, 2018USD ($)strategy	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)
Pension plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	$ 9,429	$ 10,656
Net receivables	43	51
Other benefits plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	511	565	$ 549
Net receivables	0	1
Level 3 [Member] | Pension plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	22	28	52
Level 3 [Member] | Other benefits plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	24	23	23
Fair Value Measured at Net Asset Value Per Share [Member] | Pension plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	566	594
Fair Value Measured at Net Asset Value Per Share [Member] | Other benefits plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	$ 0	0
Long duration fixed income [Member] | Pension plan assets [Member]
Investment Strategy and Asset Allocation Textuals [Abstract]
Duration target	10 years
Long duration fixed income [Member] | Level 3 [Member] | Pension plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets		0	19
Domestic large-cap stocks [Member] | Pension plan assets [Member]
Investment Strategy and Asset Allocation Textuals [Abstract]
Number of unique investment strategies | strategy	8
Global stocks [Member] | Pension plan assets [Member]
Investment Strategy and Asset Allocation Textuals [Abstract]
Number of unique investment strategies | strategy	5
International stocks [Member] | Pension plan assets [Member]
Investment Strategy and Asset Allocation Textuals [Abstract]
Number of unique investment strategies | strategy	4
Real estate [Member] | Level 3 [Member] | Pension plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	$ 14	20	25
Other [Member] | Level 3 [Member] | Pension plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	8	8	8
Other [Member] | Level 3 [Member] | Other benefits plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	$ 24	23	$ 23
Maximum [Member] | Global stocks [Member] | Pension plan assets [Member]
Investment Strategy and Asset Allocation Textuals [Abstract]
Target asset allocation	60.00%
Maximum [Member] | Investment Strategy [Member] | Defined Benefit Plan, Total Plan Assets [Member] | Domestic large-cap stocks [Member] | Pension plan assets [Member]
Investment Strategy and Asset Allocation Textuals [Abstract]
Concentration risk, percentage	2.00%
Maximum [Member] | Investment Strategy [Member] | Defined Benefit Plan, Total Plan Assets [Member] | Global stocks [Member] | Pension plan assets [Member]
Investment Strategy and Asset Allocation Textuals [Abstract]
Concentration risk, percentage	1.50%
Maximum [Member] | Investment Strategy [Member] | Defined Benefit Plan, Total Plan Assets [Member] | International stocks [Member] | Pension plan assets [Member]
Investment Strategy and Asset Allocation Textuals [Abstract]
Concentration risk, percentage	2.50%
Minimum [Member] | Global stocks [Member] | Pension plan assets [Member]
Investment Strategy and Asset Allocation Textuals [Abstract]
Target asset allocation	40.00%
Excluding NAV Investments [Member] | Pension plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	$ 8,868	10,022
Excluding NAV Investments [Member] | Other benefits plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	511	564
Excluding NAV Investments [Member] | Level 1 [Member] | Pension plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	2,615	3,062
Excluding NAV Investments [Member] | Level 1 [Member] | Other benefits plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	82	111
Excluding NAV Investments [Member] | Level 2 [Member] | Pension plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	6,231	6,932
Excluding NAV Investments [Member] | Level 2 [Member] | Other benefits plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	405	430
Excluding NAV Investments [Member] | Level 3 [Member] | Pension plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	22	28
Excluding NAV Investments [Member] | Level 3 [Member] | Other benefits plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	24	23
Excluding NAV Investments [Member] | Cash and cash equivalents [Member] | Pension plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	286	235
Excluding NAV Investments [Member] | Cash and cash equivalents [Member] | Other benefits plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	91	108
Excluding NAV Investments [Member] | Cash and cash equivalents [Member] | Level 1 [Member] | Pension plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	2	1
Excluding NAV Investments [Member] | Cash and cash equivalents [Member] | Level 1 [Member] | Other benefits plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	69	85
Excluding NAV Investments [Member] | Cash and cash equivalents [Member] | Level 2 [Member] | Pension plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	284	234
Excluding NAV Investments [Member] | Cash and cash equivalents [Member] | Level 2 [Member] | Other benefits plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	22	23
Excluding NAV Investments [Member] | Cash and cash equivalents [Member] | Level 3 [Member] | Pension plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	0	0
Excluding NAV Investments [Member] | Cash and cash equivalents [Member] | Level 3 [Member] | Other benefits plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	0	0
Excluding NAV Investments [Member] | Long duration fixed income [Member] | Pension plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	5,316	5,299
Excluding NAV Investments [Member] | Long duration fixed income [Member] | Other benefits plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	0	0
Excluding NAV Investments [Member] | Long duration fixed income [Member] | Level 1 [Member] | Pension plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	902	875
Excluding NAV Investments [Member] | Long duration fixed income [Member] | Level 1 [Member] | Other benefits plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	0	0
Excluding NAV Investments [Member] | Long duration fixed income [Member] | Level 2 [Member] | Pension plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	4,414	4,424
Excluding NAV Investments [Member] | Long duration fixed income [Member] | Level 2 [Member] | Other benefits plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	0	0
Excluding NAV Investments [Member] | Long duration fixed income [Member] | Level 3 [Member] | Pension plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	0	0
Excluding NAV Investments [Member] | Long duration fixed income [Member] | Level 3 [Member] | Other benefits plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	0	0
Excluding NAV Investments [Member] | Intermediate (core) fixed income [Member] | Pension plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	118	255
Excluding NAV Investments [Member] | Intermediate (core) fixed income [Member] | Other benefits plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	183	185
Excluding NAV Investments [Member] | Intermediate (core) fixed income [Member] | Level 1 [Member] | Pension plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	0	0
Excluding NAV Investments [Member] | Intermediate (core) fixed income [Member] | Level 1 [Member] | Other benefits plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	0	0
Excluding NAV Investments [Member] | Intermediate (core) fixed income [Member] | Level 2 [Member] | Pension plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	118	255
Excluding NAV Investments [Member] | Intermediate (core) fixed income [Member] | Level 2 [Member] | Other benefits plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	183	185
Excluding NAV Investments [Member] | Intermediate (core) fixed income [Member] | Level 3 [Member] | Pension plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	0	0
Excluding NAV Investments [Member] | Intermediate (core) fixed income [Member] | Level 3 [Member] | Other benefits plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	0	0
Excluding NAV Investments [Member] | High-yield fixed income [Member] | Pension plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	114	267
Excluding NAV Investments [Member] | High-yield fixed income [Member] | Other benefits plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	0	0
Excluding NAV Investments [Member] | High-yield fixed income [Member] | Level 1 [Member] | Pension plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	0	0
Excluding NAV Investments [Member] | High-yield fixed income [Member] | Level 1 [Member] | Other benefits plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	0	0
Excluding NAV Investments [Member] | High-yield fixed income [Member] | Level 2 [Member] | Pension plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	114	267
Excluding NAV Investments [Member] | High-yield fixed income [Member] | Level 2 [Member] | Other benefits plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	0	0
Excluding NAV Investments [Member] | High-yield fixed income [Member] | Level 3 [Member] | Pension plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	0	0
Excluding NAV Investments [Member] | High-yield fixed income [Member] | Level 3 [Member] | Other benefits plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	0	0
Excluding NAV Investments [Member] | International fixed income [Member] | Pension plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	241	283
Excluding NAV Investments [Member] | International fixed income [Member] | Other benefits plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	0	0
Excluding NAV Investments [Member] | International fixed income [Member] | Level 1 [Member] | Pension plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	55	60
Excluding NAV Investments [Member] | International fixed income [Member] | Level 1 [Member] | Other benefits plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	0	0
Excluding NAV Investments [Member] | International fixed income [Member] | Level 2 [Member] | Pension plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	186	223
Excluding NAV Investments [Member] | International fixed income [Member] | Level 2 [Member] | Other benefits plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	0	0
Excluding NAV Investments [Member] | International fixed income [Member] | Level 3 [Member] | Pension plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	0	0
Excluding NAV Investments [Member] | International fixed income [Member] | Level 3 [Member] | Other benefits plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	0	0
Excluding NAV Investments [Member] | Domestic large-cap stocks [Member] | Pension plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	820	1,125
Excluding NAV Investments [Member] | Domestic large-cap stocks [Member] | Other benefits plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	115	130
Excluding NAV Investments [Member] | Domestic large-cap stocks [Member] | Level 1 [Member] | Pension plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	582	825
Excluding NAV Investments [Member] | Domestic large-cap stocks [Member] | Level 1 [Member] | Other benefits plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	0	0
Excluding NAV Investments [Member] | Domestic large-cap stocks [Member] | Level 2 [Member] | Pension plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	238	300
Excluding NAV Investments [Member] | Domestic large-cap stocks [Member] | Level 2 [Member] | Other benefits plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	115	130
Excluding NAV Investments [Member] | Domestic large-cap stocks [Member] | Level 3 [Member] | Pension plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	0	0
Excluding NAV Investments [Member] | Domestic large-cap stocks [Member] | Level 3 [Member] | Other benefits plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	0	0
Excluding NAV Investments [Member] | Domestic mid-cap stocks [Member] | Pension plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	256	360
Excluding NAV Investments [Member] | Domestic mid-cap stocks [Member] | Other benefits plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	28	34
Excluding NAV Investments [Member] | Domestic mid-cap stocks [Member] | Level 1 [Member] | Pension plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	167	227
Excluding NAV Investments [Member] | Domestic mid-cap stocks [Member] | Level 1 [Member] | Other benefits plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	0	0
Excluding NAV Investments [Member] | Domestic mid-cap stocks [Member] | Level 2 [Member] | Pension plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	89	133
Excluding NAV Investments [Member] | Domestic mid-cap stocks [Member] | Level 2 [Member] | Other benefits plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	28	34
Excluding NAV Investments [Member] | Domestic mid-cap stocks [Member] | Level 3 [Member] | Pension plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	0	0
Excluding NAV Investments [Member] | Domestic mid-cap stocks [Member] | Level 3 [Member] | Other benefits plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	0	0
Excluding NAV Investments [Member] | Domestic small-cap stocks [Member] | Pension plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	148	236
Excluding NAV Investments [Member] | Domestic small-cap stocks [Member] | Other benefits plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	17	20
Excluding NAV Investments [Member] | Domestic small-cap stocks [Member] | Level 1 [Member] | Pension plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	141	224
Excluding NAV Investments [Member] | Domestic small-cap stocks [Member] | Level 1 [Member] | Other benefits plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	0	0
Excluding NAV Investments [Member] | Domestic small-cap stocks [Member] | Level 2 [Member] | Pension plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	7	12
Excluding NAV Investments [Member] | Domestic small-cap stocks [Member] | Level 2 [Member] | Other benefits plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	17	20
Excluding NAV Investments [Member] | Domestic small-cap stocks [Member] | Level 3 [Member] | Pension plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	0	0
Excluding NAV Investments [Member] | Domestic small-cap stocks [Member] | Level 3 [Member] | Other benefits plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	0	0
Excluding NAV Investments [Member] | Global stocks [Member] | Pension plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	429	480
Excluding NAV Investments [Member] | Global stocks [Member] | Other benefits plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	0	0
Excluding NAV Investments [Member] | Global stocks [Member] | Level 1 [Member] | Pension plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	72	89
Excluding NAV Investments [Member] | Global stocks [Member] | Level 1 [Member] | Other benefits plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	0	0
Excluding NAV Investments [Member] | Global stocks [Member] | Level 2 [Member] | Pension plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	357	391
Excluding NAV Investments [Member] | Global stocks [Member] | Level 2 [Member] | Other benefits plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	0	0
Excluding NAV Investments [Member] | Global stocks [Member] | Level 3 [Member] | Pension plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	0	0
Excluding NAV Investments [Member] | Global stocks [Member] | Level 3 [Member] | Other benefits plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	0	0
Excluding NAV Investments [Member] | International stocks [Member] | Pension plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	559	799
Excluding NAV Investments [Member] | International stocks [Member] | Other benefits plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	49	61
Excluding NAV Investments [Member] | International stocks [Member] | Level 1 [Member] | Pension plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	449	542
Excluding NAV Investments [Member] | International stocks [Member] | Level 1 [Member] | Other benefits plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	9	23
Excluding NAV Investments [Member] | International stocks [Member] | Level 2 [Member] | Pension plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	110	257
Excluding NAV Investments [Member] | International stocks [Member] | Level 2 [Member] | Other benefits plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	40	38
Excluding NAV Investments [Member] | International stocks [Member] | Level 3 [Member] | Pension plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	0	0
Excluding NAV Investments [Member] | International stocks [Member] | Level 3 [Member] | Other benefits plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	0	0
Excluding NAV Investments [Member] | Emerging market stocks [Member] | Pension plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	205	305
Excluding NAV Investments [Member] | Emerging market stocks [Member] | Other benefits plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	0	0
Excluding NAV Investments [Member] | Emerging market stocks [Member] | Level 1 [Member] | Pension plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	0	0
Excluding NAV Investments [Member] | Emerging market stocks [Member] | Level 1 [Member] | Other benefits plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	0	0
Excluding NAV Investments [Member] | Emerging market stocks [Member] | Level 2 [Member] | Pension plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	205	305
Excluding NAV Investments [Member] | Emerging market stocks [Member] | Level 2 [Member] | Other benefits plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	0	0
Excluding NAV Investments [Member] | Emerging market stocks [Member] | Level 3 [Member] | Pension plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	0	0
Excluding NAV Investments [Member] | Emerging market stocks [Member] | Level 3 [Member] | Other benefits plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	0	0
Excluding NAV Investments [Member] | Real estate [Member] | Pension plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	195	208
Excluding NAV Investments [Member] | Real estate [Member] | Other benefits plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	0	0
Excluding NAV Investments [Member] | Real estate [Member] | Level 1 [Member] | Pension plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	148	157
Excluding NAV Investments [Member] | Real estate [Member] | Level 1 [Member] | Other benefits plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	0	0
Excluding NAV Investments [Member] | Real estate [Member] | Level 2 [Member] | Pension plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	33	31
Excluding NAV Investments [Member] | Real estate [Member] | Level 2 [Member] | Other benefits plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	0	0
Excluding NAV Investments [Member] | Real estate [Member] | Level 3 [Member] | Pension plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	14	20
Excluding NAV Investments [Member] | Real estate [Member] | Level 3 [Member] | Other benefits plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	0	0
Excluding NAV Investments [Member] | Hedge funds [Member] | Pension plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	95	90
Excluding NAV Investments [Member] | Hedge funds [Member] | Other benefits plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	0	0
Excluding NAV Investments [Member] | Hedge funds [Member] | Level 1 [Member] | Pension plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	63	62
Excluding NAV Investments [Member] | Hedge funds [Member] | Level 1 [Member] | Other benefits plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	0	0
Excluding NAV Investments [Member] | Hedge funds [Member] | Level 2 [Member] | Pension plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	32	28
Excluding NAV Investments [Member] | Hedge funds [Member] | Level 2 [Member] | Other benefits plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	0	0
Excluding NAV Investments [Member] | Hedge funds [Member] | Level 3 [Member] | Pension plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	0	0
Excluding NAV Investments [Member] | Hedge funds [Member] | Level 3 [Member] | Other benefits plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	0	0
Excluding NAV Investments [Member] | Other [Member] | Pension plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	86	80
Excluding NAV Investments [Member] | Other [Member] | Other benefits plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	28	26
Excluding NAV Investments [Member] | Other [Member] | Level 1 [Member] | Pension plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	34	0
Excluding NAV Investments [Member] | Other [Member] | Level 1 [Member] | Other benefits plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	4	3
Excluding NAV Investments [Member] | Other [Member] | Level 2 [Member] | Pension plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	44	72
Excluding NAV Investments [Member] | Other [Member] | Level 2 [Member] | Other benefits plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	0	0
Excluding NAV Investments [Member] | Other [Member] | Level 3 [Member] | Pension plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	8	8
Excluding NAV Investments [Member] | Other [Member] | Level 3 [Member] | Other benefits plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	24	23
Including NAV Investments [Member] | Pension plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	9,477	10,667
Including NAV Investments [Member] | Other benefits plan assets [Member]
Balances of pension plan and other benefit plan assets measured at fair value [Abstract]
Total plan assets	$ 511	$ 565

Employee Benefits, Fair Value L

Employee Benefits, Fair Value Level 3 Pension and Other Benefit Plan Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Defined Contribution Retirement Plans Textual [Abstract]
Defined contribution retirement plan expense	$ 1,200	$ 1,200	$ 1,200
Pension plan assets [Member]
Changes in Level 3 pension plan assets measured at fair value [Abstract]
Fair value of plan assets at beginning of year	10,656
Fair value of plan assets at end of year	9,429	10,656
Pension plan assets [Member] | Level 3 [Member]
Changes in Level 3 pension plan assets measured at fair value [Abstract]
Fair value of plan assets at beginning of year	28	52
Gross realized gain (loss)	(2)	(3)
Gross unrealized gain (loss)	(1)	5
Purchases, sales and settlements (net)	(3)	(4)
Transfers Into/ (Out of) Level 3	0	(22)
Fair value of plan assets at end of year	22	28	52
Other benefits plan assets [Member]
Changes in Level 3 pension plan assets measured at fair value [Abstract]
Fair value of plan assets at beginning of year	565	549
Fair value of plan assets at end of year	511	565	549
Other benefits plan assets [Member] | Level 3 [Member]
Changes in Level 3 pension plan assets measured at fair value [Abstract]
Fair value of plan assets at beginning of year	23	23
Gross realized gain (loss)	1	0
Gross unrealized gain (loss)	0	0
Purchases, sales and settlements (net)	0	0
Transfers Into/ (Out of) Level 3	0	0
Fair value of plan assets at end of year	24	23	23
Long duration fixed income [Member] | Pension plan assets [Member] | Level 3 [Member]
Changes in Level 3 pension plan assets measured at fair value [Abstract]
Fair value of plan assets at beginning of year	0	19
Gross realized gain (loss)		0
Gross unrealized gain (loss)		0
Purchases, sales and settlements (net)		0
Transfers Into/ (Out of) Level 3		(19)
Fair value of plan assets at end of year		0	19
Real estate [Member] | Pension plan assets [Member] | Level 3 [Member]
Changes in Level 3 pension plan assets measured at fair value [Abstract]
Fair value of plan assets at beginning of year	20	25
Gross realized gain (loss)	(2)	(3)
Gross unrealized gain (loss)	(1)	5
Purchases, sales and settlements (net)	(3)	(4)
Transfers Into/ (Out of) Level 3	0	(3)
Fair value of plan assets at end of year	14	20	25
Other [Member] | Pension plan assets [Member] | Level 3 [Member]
Changes in Level 3 pension plan assets measured at fair value [Abstract]
Fair value of plan assets at beginning of year	8	8
Gross realized gain (loss)	0	0
Gross unrealized gain (loss)	0	0
Purchases, sales and settlements (net)	0	0
Transfers Into/ (Out of) Level 3	0	0
Fair value of plan assets at end of year	8	8	8
Other [Member] | Other benefits plan assets [Member] | Level 3 [Member]
Changes in Level 3 pension plan assets measured at fair value [Abstract]
Fair value of plan assets at beginning of year	23	23
Gross realized gain (loss)	1	0
Gross unrealized gain (loss)	0	0
Purchases, sales and settlements (net)	0	0
Transfers Into/ (Out of) Level 3	0	0
Fair value of plan assets at end of year	$ 24	$ 23	$ 23
Domestic Plan [Member] | Wells Fargo And Company 401(k) Plan [Member]
Defined Contribution Retirement Plans Textual [Abstract]
Service period for employee to be eligible for 401(k) plan	1 month
Percentage of employee contribution (up to 50%)	50.00%
Service period for employee to be eligible for company matching contributions	1 year
Percentage of employer match (up to 6%)	6.00%
Matching contribution vesting percentage	100.00%
Service period for employee to be eligible for profit sharing contributions	1 year
Profit sharing contribution vesting period	3 years

Employee Benefits and Other E_3

Employee Benefits and Other Expenses, Expenses Not Otherwise Shown Separately In Financial Statements (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Expenses Not Otherwise Shown Separately In Financial Statement [Abstract]
Outside professional services	$ 3,306	$ 3,813	$ 3,138
Operating losses	3,124	5,492	1,608
Contract services	2,192	1,638	1,497
Operating leases	1,334	1,351	1,329
Outside data processing	660	891	888
Credit card rewards and rebates
Expenses Not Otherwise Shown Separately In Financial Statement [Abstract]
Credit card rewards and rebates	$ 1,401	$ 1,201	$ 1,047

Income Taxes, Components of Inc

Income Taxes, Components of Income Tax Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Effective Income Tax Rate Reconciliation, Tax Reform Act, Amount	$ 164	$ (3,713)	$ 0
Current:
Federal	2,382	3,507	6,712
State and local	1,140	561	1,395
Foreign	170	183	175
Total current	3,692	4,251	8,282
Deferred:
Federal	1,706	156	1,498
State and local	236	564	296
Foreign	28	(54)	(1)
Total deferred	1,970	666	1,793
Income tax expense	$ 5,662	$ 4,917	$ 10,075

Income Taxes, Net Deferred Tax

Income Taxes, Net Deferred Tax Asset (Liability) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Deferred tax assets
Allowance for loan losses		$ 2,644	$ 2,816
Deferred compensation and employee benefits		2,893	2,377
Accrued expenses		815	722
PCI loans		467	1,057
Net unrealized losses on investment securities		1,022	0
Net operating loss and tax credit carry forwards		366	341
Other		1,272	986
Total deferred tax assets		9,479	8,299
Deferred tax assets valuation allowance		(315)	(397)
Deferred tax liabilities
Mortgage servicing rights		(3,475)	(3,421)
Leasing		(4,271)	(4,084)
Basis difference in investments		(1,203)	(577)
Mark to market, net		(7,252)	(5,816)
Intangible assets		(427)	(539)
Net unrealized gains on debt securities		0	(55)
Insurance reserves		(696)	(750)
Other		(831)	(821)
Total deferred tax liabilities		(18,155)	(16,063)
Net deferred tax liability		(8,991)	(8,161)
Other comprehensive income, tax effect		1,144	(434)	$ 1,996
Deferred tax assets valuation allowance		315	$ 397
Net operating loss related to deferred tax assets		$ 366
Expiration date of tax credit carryforwards		Dec. 31, 2038
Undistributed Earnings of Foreign Subsidiaries		$ 0
Accounting Standards Update 2018-02 [Member]
Deferred tax liabilities
Adoption of accounting standard	[1]	0
Accounting Standards Update 2018-02 [Member] | Retained earnings [Member]
Deferred tax liabilities
Adoption of accounting standard	[1]	$ 400
[1]	(2)Represents the reclassification from other comprehensive income to retained earnings as a result of our 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.

Income Taxes, Effective Income

Income Taxes, Effective Income Tax Expense and Rate (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Statutory federal income tax expense	$ 5,892	$ 9,485	$ 11,204
Statutory federal income tax expense, rate	21.00%	35.00%	35.00%
Change in tax rate resulting from:
State and local taxes on income, net of federal income tax benefit	$ 1,076	$ 926	$ 1,004
State and local taxes on income, net of federal income tax benefit, rate	3.90%	3.40%	3.10%
Tax-exempt interest	$ (494)	$ (812)	$ (725)
Tax-exempt interest, rate	(1.80%)	(3.00%)	(2.20%)
Tax credits	$ (1,537)	$ (1,419)	$ (1,251)
Tax credits, rate	(5.50%)	(5.20%)	(3.90%)
Non-deductible accruals	$ 236	$ 1,320	$ 81
Non-deductible accruals, rate	0.80%	4.90%	0.30%
Tax reform	$ 164	$ (3,713)	$ 0
Tax reform, rate	0.60%	(13.70%)	0.00%
Other	$ 325	$ (870)	$ (238)
Other, rate	1.20%	(3.30%)	(0.80%)
Income tax expense	$ 5,662	$ 4,917	$ 10,075
Effective income tax rate	20.20%	18.10%	31.50%
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability		$ 3,900
Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Amount		$ 173

Income Taxes, Change in Unrecog

Income Taxes, Change in Unrecognized Tax Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at beginning of year	$ 5,167	$ 5,029
Additions:
For tax positions related to the current year	393	367
For tax positions related to prior years	503	158
Reductions:
For tax positions related to prior years	(262)	(319)
Lapse of statute of limitations	(7)	(48)
Settlements with tax authorities	(44)	(20)
Balance at end of year	5,750	5,167
Unrecognized Tax Benefits	5,167	5,029	$ 5,750	$ 5,167
Unrecognized Tax Benefits that Would Impact Effective Tax Rate			3,900
Unrecognized Tax Benefits Related To Income Tax Positions On Temporary Differences			1,900
Accrued interest and penalties			968	$ 726
Recognized Interest and Penalties Expense (Benefit)	$ 200	$ 96
Possible decrease in unrecognized tax benefits (up to $1 billion)			$ 700

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		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Earnings per Common Share, Basic and Diluted [Line Items]
Preferred stock redeemed, Value	[1]	$ 2,150
Earnings Per Common Share [Abstract]
Wells Fargo net income		22,393	$ 22,183	$ 21,938
Less: Preferred stock dividends and other		1,704	1,629	1,565
Wells Fargo net income applicable to common stock		$ 20,689	$ 20,554	$ 20,373
Earnings per common share
Average common shares outstanding (denominator) (in shares)		4,799.7	4,964.6	5,052.8
Per share (in dollars per share)		$ 4.31	$ 4.14	$ 4.03
Diluted earnings per common share
Average common shares outstanding (in shares)		4,799.7	4,964.6	5,052.8
Diluted average common shares outstanding (denominator) (in shares)		4,838.4	5,017.3	5,108.3
Per share (in dollars per share)		$ 4.28	$ 4.10	$ 3.99
Series J [Member]
Earnings per Common Share, Basic and Diluted [Line Items]
Preferred stock redeemed, Value		$ 155
Stock Options [Member]
Diluted earnings per common share
Weighted average number of diluted shares outstanding, adjustment (in shares)		8	17.1	18.9
Restricted Share Rights [Member]
Diluted earnings per common share
Weighted average number of diluted shares outstanding, adjustment (in shares)		26.3	24.7	25.9
Warrants [Member]
Diluted earnings per common share
Weighted average number of diluted shares outstanding, adjustment (in shares)		4.4	10.9	10.7
[1]	(3)Represents the impact of the redemption of preferred stock, series J, in third quarter 2018.

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	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Stock Options [Member]
Earnings Per Common Share - Options and Warrants [Line Items]
Antidilutive Instruments	0.3	1.9	3.2

Earnings Per Common Share Earni

Earnings Per Common Share Earnings Per Common Share Dividends Declared Per Common Shares (Details) - $ / shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Earnings Per Share, Basic and Diluted, Other Disclosures [Abstract]
Common Stock, Dividends, Per Share, Declared	$ 1.640	$ 1.540	$ 1.515

Other Comprehensive Income, Com

Other Comprehensive Income, Components of Other Comprehensive Income (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Debt securities (1):
Net unrealized gains (losses) arising during the period, Before tax	[1]	$ (4,493)	$ 2,719	$ (3,458)
Net unrealized gains (losses) arising during the period, Tax effect		1,100	(1,056)	1,302
Net unrealized gains (losses) arising during the period, Net of tax		(3,393)	1,663	(2,156)
Reclassification of net (gains) losses to net income, Before tax	[1]	248	(737)	(1,240)
Reclassification of net (gains) losses to net income, Tax effect		(61)	278	467
Reclassification of net (gains) losses to net income, Net of tax		187	(459)	(773)
Net change, Before tax		(4,245)	1,982	(4,698)
Net change, Tax effect		1,039	(778)	1,769
Net change, Net of tax		(3,206)	1,204	(2,929)
Cash Flow Hedges:
Net unrealized gains (losses) arising during the period on cash flow hedges, Before Tax		(532)	(540)	177
Reclassification of net (gains) losses to net income on cash flow hedges, Before Tax		294	(543)	(1,029)
Net change, Before tax		(238)	(1,083)	(852)
Net change, Tax effect		58	408	321
Net change, Net of tax		(180)	(675)	(531)
Defined benefit plans adjustments:
Net actuarial and prior service gains (losses) rising during the period, Before tax		(434)	49	(52)
Net actuarial and prior service gains (losses) arising during the period, Tax effect		106	(12)	(40)
Net actuarial and prior service gains (losses) arising during the period, Net of tax		(328)	37	(92)
Amortization of net actuarial loss, Before tax		127	150	153
Amortization of net actuarial loss, Tax effect		(31)	(57)	(57)
Amortization of net actuarial loss, Net of tax		96	93	96
Settlements and other, Before tax		126	3	5
Settlements and other, Tax effect		(29)	2	(1)
Settlements and other, Net of tax		97	5	4
Subtotal reclassification of amounts to noninterest expense and employee benefits, Before tax		253	153	158
Subtotal reclassification of amounts to noninterest expense and employee benefits, Tax effect		(60)	(55)	(58)
Subtotal reclassification of amounts to noninterest expense and employee benefits, Net of tax		193	98	100
Net change, Before tax		(181)	202	106
Net change, Tax effect		46	(67)	(98)
Net change, Net of tax		(135)	135	8
Foreign currency translation adjustments:
Net unrealized gains (losses) arising during the period, Before tax		(156)	96	(3)
Net unrealized gains (losses) arising during the period, Tax effect		1	3	4
Net unrealized gains (losses) arising during the period, Net of tax		(155)	99	1
Net change, Before tax		(156)	96	(3)
Net change, Tax effect		1	3	4
Net change, Net of tax		(155)	99	1
Other comprehensive income (loss), Before tax		(4,820)	1,197	(5,447)
Other comprehensive income (loss), tax effect		1,144	(434)	1,996
Other comprehensive income (loss), net of tax		(3,676)	763	(3,451)
Less: Other comprehensive loss from noncontrolling interests		(2)	(62)	(17)
Wells Fargo other comprehensive income (loss), net of tax		(3,674)	825	(3,434)
Fair Value Hedging [Member]
Fair Value Hedges:
Change in fair value of excluded components on fair value hedges, Before Tax		(254)	(253)	0
Change in fair value of excluded components on fair value hedges, Tax		63	95	0
Change in fair value of excluded components on fair value hedges, Net of Tax		(191)	(158)	0
Cash Flow Hedging [Member]
Cash Flow Hedges:
Net unrealized gains (losses) arising during the period on cash flow hedges, Before Tax		(278)	(287)	177
Net unrealized gains (losses) arising during the period on cash flow hedges, Tax		67	108	(67)
Net unrealized gains (losses) arising during the period on cash flow hedges, Net of Tax		(211)	(179)	110
Reclassification of net (gains) losses to net income on cash flow hedges, Before Tax		294	(543)	(1,029)
Reclassification of net (gains) losses to net income on cash flow hedges, Tax		(72)	205	388
Reclassification of net (gains) losses to net income on cash flow hedges, Net of Tax		222	(338)	(641)
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		2	8	14
Reclassification of net (gains) losses to net income on cash flow hedges, Tax		0	(3)	(5)
Reclassification of net (gains) losses to net income on cash flow hedges, Net of Tax		2	5	9
Other noninterest income [Member]
Debt securities (1):
Reclassification of net (gains) losses to net income, Before tax		(1)	0	(5)
Reclassification of net (gains) losses to net income, Tax effect		0	0	2
Reclassification of net (gains) losses to net income, Net of tax		(1)	0	(3)
Debt securities [Member] | Interest income [Member]
Debt securities (1):
Reclassification of net (gains) losses to net income, Before tax		357	198	7
Reclassification of net (gains) losses to net income, Tax effect		(88)	(75)	(3)
Reclassification of net (gains) losses to net income, Net of tax		269	123	4
Debt securities [Member] | Net gains on debt securities [Member]
Debt securities (1):
Reclassification of net (gains) losses to net income, Before tax		(108)	(479)	(942)
Reclassification of net (gains) losses to net income, Tax effect		27	181	355
Reclassification of net (gains) losses to net income, Net of tax		(81)	(298)	(587)
Equity securities [Member] | Net gains from equity securities [Member]
Debt securities (1):
Reclassification of net (gains) losses to net income, Before tax		0	(456)	(300)
Reclassification of net (gains) losses to net income, Tax effect		0	172	113
Reclassification of net (gains) losses to net income, Net of tax		0	(284)	(187)
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		292	(551)	(1,043)
Reclassification of net (gains) losses to net income on cash flow hedges, Tax		(72)	208	393
Reclassification of net (gains) losses to net income on cash flow hedges, Net of Tax		$ 220	(343)	(650)
Accounting Standards Update 2016-01 [Member]
Debt securities (1):
Net unrealized gains (losses) arising during the period, Before tax			81	259
Reclassification of net (gains) losses to net income, Before tax			$ (456)	$ (300)
[1]	(1)The year ended December 31, 2017, and December 31, 2016, includes net unrealized gains (losses) arising during the period from equity securities of $81 million and $259 million and reclassification of net (gains) losses to net income related to equity securities of $(456) million and $(300) million, respectively. In connection with our adoption in first quarter 2018 of ASU 2016-01, the year ended December 31, 2018, reflects net unrealized gains (losses) arising during the period and reclassification of net (gains) losses to net income from only debt securities.

Other Comprehensive Income, Cum

Other Comprehensive Income, Cumulative OCI Balances (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Cumulative OCI balances [Abstract]
Balance, beginning of period		$ 208,079	$ 200,497	$ 193,891
Balance, beginning of period adjusted balance			208,055	200,284	$ 194,012
Net change, Other comprehensive income (loss), net of tax		(3,676)	763	(3,451)
Less: Other comprehensive income (loss) from noncontrolling interests		2	62	17
Balance, end of period		197,066	208,079	200,497
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Net unrealized gains (losses) arising during the period, Before tax	[1]	(4,493)	2,719	(3,458)
Reclassification of net (gains) losses to net income, Before tax	[1]	248	(737)	(1,240)
Accounting Standards Update 2017-12 [Member]
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Transition Adjustment	[2]			(213)
Accounting Standards Update 2016-01 [Member]
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Net unrealized gains (losses) arising during the period, Before tax			81	259
Reclassification of net (gains) losses to net income, Before tax			(456)	(300)
Cumulative other comprehensive income [Member]
Cumulative OCI balances [Abstract]
Balance, beginning of period		(2,144)	(3,137)	297
Balance, beginning of period adjusted balance			(2,262)	(2,969)	297
Reclassification of certain tax effects to retained earnings		(400)
Net unrealized gains (losses) arising during the period		(4,278)	1,462	(2,137)
Amounts reclassified from accumulated other comprehensive income		602	(699)	(1,314)
Net change, Other comprehensive income (loss), net of tax		(4,076)	763	(3,451)
Balance, end of period		(6,336)	(2,144)	(3,137)
Cumulative other comprehensive income [Member] | Accounting Standards Update 2017-12 [Member]
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Transition Adjustment	[2]			168
Cumulative other comprehensive income [Member] | Accounting Standards Update 2016-01 [Member]
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Transition Adjustment	[3]		(118)
Debt securities, parent [Member]
Cumulative OCI balances [Abstract]
Balance, beginning of period		171	(1,099)	1,813
Balance, beginning of period adjusted balance			53	(1,099)
Reclassification of certain tax effects to retained earnings		31
Net unrealized gains (losses) arising during the period		(3,393)	1,663	(2,156)
Amounts reclassified from accumulated other comprehensive income		187	(459)	(773)
Net change, Other comprehensive income (loss), net of tax		(3,175)	1,204	(2,929)
Balance, end of period		(3,122)	171	(1,099)
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		(418)	89	620
Balance, beginning of period adjusted balance			(418)	257
Reclassification of certain tax effects to retained earnings		(87)
Net unrealized gains (losses) arising during the period		(402)	(337)	110
Amounts reclassified from accumulated other comprehensive income		222	(338)	(641)
Net change, Other comprehensive income (loss), net of tax		(267)	(675)	(531)
Balance, end of period		(685)	(418)	89
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		(1,808)	(1,943)	(1,951)
Balance, beginning of period adjusted balance			(1,808)	(1,943)
Reclassification of certain tax effects to retained earnings		(353)
Net unrealized gains (losses) arising during the period		(328)	37	(92)
Amounts reclassified from accumulated other comprehensive income		193	98	100
Net change, Other comprehensive income (loss), net of tax		(488)	135	8
Balance, end of period		(2,296)	(1,808)	(1,943)
Foreign currency translation adjustments, parent [Member]
Cumulative OCI balances [Abstract]
Balance, beginning of period		(89)	(184)	(185)
Balance, beginning of period adjusted balance			(89)	(184)
Reclassification of certain tax effects to retained earnings		9
Net unrealized gains (losses) arising during the period		(155)	99	1
Amounts reclassified from accumulated other comprehensive income		0	0	0
Net change, Other comprehensive income (loss), net of tax		(146)	99	1
Balance, end of period		(233)	(89)	(184)
Noncontrolling interests [Member]
Cumulative OCI balances [Abstract]
Balance, beginning of period		1,143	916	893
Balance, beginning of period adjusted balance			1,143	916	$ 1,014
Less: Other comprehensive income (loss) from noncontrolling interests		(2)	(62)	(17)
Balance, end of period		900	1,143	916
AOCI Attributable to Noncontrolling Interest [Member]
Cumulative OCI balances [Abstract]
Less: Other comprehensive income (loss) from noncontrolling interests		(2)	(62)	(17)
Debt securities, noncontrolling interest [Member]
Cumulative OCI balances [Abstract]
Less: Other comprehensive income (loss) from noncontrolling interests		0	(66)	(17)
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		$ (2)	$ 4	$ 0
[1]	(1)The year ended December 31, 2017, and December 31, 2016, includes net unrealized gains (losses) arising during the period from equity securities of $81 million and $259 million and reclassification of net (gains) losses to net income related to equity securities of $(456) million and $(300) million, respectively. In connection with our adoption in first quarter 2018 of ASU 2016-01, the year ended December 31, 2018, reflects net unrealized gains (losses) arising during the period and reclassification of net (gains) losses to net income from only debt securities.
[2]	(3)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.
[3]	(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.

Operating Segments (Details)

Operating Segments (Details) $ in Millions	12 Months Ended
	Dec. 31, 2018USD ($)segment	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)	Dec. 31, 2014USD ($)
Financial Information of Operating Segment [Abstract]
Net interest income	$ 49,995	$ 49,557	$ 47,754
Provision (reversal of provision) for credit losses	1,744	2,528	3,770	$ 2,442	$ 1,395
Noninterest income	36,413	38,832	40,513
Noninterest expense	56,126	58,484	52,377
Income before income tax expense	28,538	27,377	32,120
Income tax expense (benefit)	5,662	4,917	10,075
Net income before noncontrolling interests	22,876	22,460	22,045
Less: Net income from noncontrolling interests	483	277	107
Wells Fargo net income	22,393	22,183	21,938
Average loans	945,200	956,100
Average assets	1,888,900	1,933,000
Average deposits	$ 1,275,900	1,304,600
Operating Segment (Textual) [Abstract]
Number of reportable operating segments | segment	3
Annual sales of small business community banking customers (up to $5 million)	$ 5
Annual sales of wholesale banking customers (in excess of $5 million)	5
Community Banking [Member]
Financial Information of Operating Segment [Abstract]
Net interest income	29,219	28,658	27,333
Provision (reversal of provision) for credit losses	1,783	2,555	2,691
Noninterest income	17,694	18,360	19,180
Noninterest expense	30,491	32,615	27,655
Income before income tax expense	14,639	11,848	16,167
Income tax expense (benefit)	3,784	634	5,213
Net income before noncontrolling interests	10,855	11,214	10,954
Less: Net income from noncontrolling interests	461	276	136
Wells Fargo net income	10,394	10,938	10,818
Average loans	463,700	475,700
Average assets	1,034,100	1,085,500
Average deposits	757,200	729,600
Wholesale Banking [Member]
Financial Information of Operating Segment [Abstract]
Net interest income	18,690	18,810	18,699
Provision (reversal of provision) for credit losses	(58)	(19)	1,073
Noninterest income	10,016	11,190	12,348
Noninterest expense	16,157	16,624	15,901
Income before income tax expense	12,607	13,395	14,073
Income tax expense (benefit)	1,555	3,496	4,159
Net income before noncontrolling interests	11,052	9,899	9,914
Less: Net income from noncontrolling interests	20	(15)	(28)
Wells Fargo net income	11,032	9,914	9,942
Average loans	465,700	465,600
Average assets	830,500	822,800
Average deposits	423,700	464,200
Wealth And Investment Management [Member]
Financial Information of Operating Segment [Abstract]
Net interest income	4,441	4,641	4,249
Provision (reversal of provision) for credit losses	(5)	(5)	(5)
Noninterest income	11,935	12,431	12,029
Noninterest expense	12,938	12,623	12,051
Income before income tax expense	3,443	4,454	4,232
Income tax expense (benefit)	861	1,668	1,596
Net income before noncontrolling interests	2,582	2,786	2,636
Less: Net income from noncontrolling interests	2	16	(1)
Wells Fargo net income	2,580	2,770	2,637
Average loans	74,600	71,900
Average assets	83,900	82,800
Average deposits	165,000	189,000
Other [Member]
Financial Information of Operating Segment [Abstract]
Net interest income	(2,355)	(2,552)	(2,527)
Provision (reversal of provision) for credit losses	24	(3)	11
Noninterest income	(3,232)	(3,149)	(3,044)
Noninterest expense	(3,460)	(3,378)	(3,230)
Income before income tax expense	(2,151)	(2,320)	(2,352)
Income tax expense (benefit)	(538)	(881)	(893)
Net income before noncontrolling interests	(1,613)	(1,439)	(1,459)
Less: Net income from noncontrolling interests	0	0	0
Wells Fargo net income	(1,613)	(1,439)	$ (1,459)
Average loans	(58,800)	(57,100)
Average assets	(59,600)	(58,100)
Average deposits	$ (70,000)	$ (78,200)

Parent-Only Financial Stateme_3

Parent-Only Financial Statements, Statement of Income (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income
Other		$ 2,473	$ 1,603	$ 1,289
Total income		86,408	88,389	88,267
Interest expense
Short-term borrowings		1,717	758	330
Long-term debt		6,703	5,157	3,830
Other		610	424	354
Noninterest expense		56,126	58,484	52,377
Income before income tax benefit and equity in undistributed income of subsidiaries		28,538	27,377	32,120
Income tax benefit		5,662	4,917	10,075
Wells Fargo net income		22,393	22,183	21,938
Parent Company [Member]
Income
Dividends from subsidiaries	[1]	22,427	20,746	12,776
Interest income from subsidiaries		3,298	1,984	1,615
Other interest income		49	146	155
Other		(424)	1,238	177
Total income		25,350	24,114	14,723
Interest expense
Indebtedness to nonbank subsidiaries		644	189	387
Short-term borrowings		2	0	0
Long-term debt		4,541	3,595	2,619
Other		3	5	19
Noninterest expense		286	1,888	1,300
Total expense		5,476	5,677	4,325
Income before income tax benefit and equity in undistributed income of subsidiaries		19,874	18,437	10,398
Income tax benefit		(544)	(319)	(1,152)
Equity in undistributed income of subsidiaries		1,975	3,427	10,388
Wells Fargo net income		22,393	22,183	21,938
Parent Company [Member] | Bank [Member]
Income
Dividends from subsidiaries		$ 20,800	$ 17,900	$ 12,500
[1]	(1) Includes dividends paid from indirect bank subsidiaries of $20.8 billion, $17.9 billion and $12.5 billion in 2018, 2017 and 2016, respectively.

Parent-Only Financial Stateme_4

Parent-Only Financial Statements, Statement of Comprehensive Income (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017		Dec. 31, 2016
Parent-Only Statement of Comprehensive Income [Abstract]
Net income	$ 22,393	$ 22,183		$ 21,938
Other comprehensive income (loss), net of tax:
Debt securities (1)	(3,206)	1,204		(2,929)
Derivatives and hedging activities	(180)	(675)		(531)
Defined benefit plans adjustment	(135)	135		8
Wells Fargo other comprehensive income (loss), net of tax	(3,674)	825		(3,434)
Wells Fargo comprehensive income	18,719	23,008		18,504
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Net unrealized gains (losses) arising during the period, Net of tax	(3,393)	1,663		(2,156)
Reclassification of net (gains) losses to net income, Net of tax	187	(459)		(773)
Parent Company [Member]
Parent-Only Statement of Comprehensive Income [Abstract]
Net income	22,393	22,183		21,938
Other comprehensive income (loss), net of tax:
Debt securities (1)	(12)	94	[1]	(76)	[1]
Derivatives and hedging activities	(198)	(158)		0
Defined benefit plans adjustment	(132)	118		(20)
Equity in other comprehensive income (loss) of subsidiaries	(3,332)	771		(3,338)
Wells Fargo other comprehensive income (loss), net of tax	(3,674)	825		(3,434)
Wells Fargo comprehensive income	$ 18,719	23,008		18,504
Parent Company [Member] | Accounting Standards Update 2016-01 [Member]
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Net unrealized gains (losses) arising during the period, Net of tax		3		7
Reclassification of net (gains) losses to net income, Net of tax		$ (21)		$ (30)
[1]	(1)The years ended December 31, 2017 and 2016, includes net unrealized gains arising during the period from equity securities of $3 million and $7 million and reclassification of net (gains) to net income related to equity securities of $(21) million and $(30) million, respectively. In connection with our adoption in first quarter 2018 of ASU 2016-01 – Financial Instruments – Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities, the year ended December 31, 2018, reflects net unrealized gains (losses) arising during the period and reclassification of net (gains) losses to net income from only debt securities.

Parent-Only Financial Stateme_5

Parent-Only Financial Statements, Balance Sheet (Details) - USD ($) $ in Millions		Dec. 31, 2018	Dec. 31, 2017		Dec. 31, 2016		Dec. 31, 2015
Assets
Cash, cash equivalents, and restricted cash		$ 173,287	$ 215,947	[1],[2]	$ 221,400	[2]	$ 239,520	[2]
Trading, at fair value (2)		69,989	57,624	[3]
Available-for-sale, at fair value (2)		269,912	276,407	[3]
Equity securities		55,148	62,497	[3]
Total assets	[4]	1,895,883	1,951,757
Liabilities and equity
Short-term borrowings		105,787	103,256		96,781
Accrued expenses and other liabilities		69,317	70,615
Long-term debt		229,044	225,020
Total liabilities	[5]	1,698,817	1,743,678
Stockholders’ equity		196,166	206,936
Total liabilities and equity		1,895,883	1,951,757
Parent Company [Member]
Assets
Cash, cash equivalents, and restricted cash		16,301	23,181	[6]	$ 36,660	[6]	$ 36,166	[6]
Trading, at fair value (2)		0	24	[7]
Available-for-sale, at fair value (2)		1	5	[7]
Investments in subsidiaries	[8]	202,695	206,367
Equity securities		2,164	2,414	[7]
Other assets (2)		4,639	4,731	[7]
Total assets		364,963	375,403
Liabilities and equity
Accrued expenses and other liabilities		6,986	7,902
Long-term debt		135,079	146,130
Indebtedness to nonbank subsidiaries		26,732	14,435
Total liabilities		168,797	168,467
Stockholders’ equity		196,166	206,936
Total liabilities and equity		364,963	375,403
Parent Company [Member] | Bank [Member]
Assets
Investments in subsidiaries		167,600	170,500
Parent Company [Member] | Nonbank [Member]
Assets
Loans to nonbank subsidiaries		139,163	138,681
Parent Company [Member] | Subsidiary Banks [Member]
Assets
Cash, cash equivalents, and restricted cash		16,301	23,180	[9]
Parent Company [Member] | Nonaffiliates [Member]
Assets
Cash, cash equivalents, and restricted cash		$ 0	$ 1	[9]
[1]	(1)Financial information has been revised to reflect the impact of our 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 has been revised to reflect the impact of our 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.
[3]	(2)Financial information for the prior period has been revised to reflect presentation changes in connection with our 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.
[4]	(4)Our consolidated assets at December 31, 2018 and 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, $139 million and $116 million; Interest-bearing deposits with banks, $8 million and $371 million; Debt securities, $45 million and $0 million; Net loans, $13.6 billion and $12.5 billion; Derivative assets, $0 million and $0 million; Equity securities, $85 million and $306 million; Other assets, $221 million and $342 million; and Total assets, $14.1 billion and $13.6 billion, respectively.
[5]	$221 million and $342 million; and Total assets, $14.1 billion and $13.6 billion, respectively.(5)Our consolidated liabilities at December 31, 2018 and 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, $191 million and $132 million; Long-term debt, $816 million and $1.5 billion; and Total liabilities, $1.0 billion and $1.6 billion, respectively.
[6]	(2)Financial information has been revised to reflect the impact of our 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 restricted cash. See Note 1 (Summary of Significant Accounting Policies) for more information.
[7]	(2)Financial information for the prior period has been revised to reflect presentation changes made in connection with our 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.
[8]	(3)The years ended December 31, 2018, and December 31, 2017, include indirect ownership of bank subsidiaries with equity of $167.6 billion and $170.5 billion, respectively.
[9]	(1)Financial information has been revised to reflect the impact of our 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 restricted cash. See Note 1 (Summary of Significant Accounting Policies) for more information.

Parent-Only Financial Stateme_6

Parent-Only Financial Statements, Statement of Cash Flows (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016
Cash flows from operating activities:
Net cash provided by operating activities (1)		$ 36,073		$ 18,619		$ 1,008
Available-for-sale debt securities:
Proceeds from sales		7,320		42,067	[1]	30,958	[1]
Prepayments and maturities (1)		36,725		45,688	[1]	40,998	[1]
Purchases		(60,067)		(103,656)	[1]	(120,978)	[1]
Equity securities, not held for trading:
Proceeds from sales and capital returns		6,242		5,451	[1]	3,711	[1]
Purchases		(6,433)		(3,735)	[1]	(5,383)	[1]
Loans:
Other, net		(769)		(709)	[2]	(508)	[2]
Net cash provided (used) by investing activities		(7,754)		(13,152)		(141,919)
Cash flows from financing activities:
Net increase (decrease) in short-term borrowings and indebtedness to subsidiaries		2,531		14,020		(1,198)
Long-term debt:
Proceeds from issuance		47,595		43,575		90,111
Repayment		(40,565)		(80,802)		(34,462)
Preferred stock:
Proceeds from issuance		0		677		2,101
Redeemed		(2,150)		0		0
Cash dividends paid		(1,622)		(1,629)		(1,566)
Common stock:
Proceeds from issuance		632		1,211		1,415
Stock tendered for payment of withholding taxes		(331)		(393)		(494)
Repurchased		(20,633)		(9,908)		(8,116)
Cash dividends paid		(7,692)		(7,480)		(7,472)
Other, net		(248)		(133)		(107)
Net cash provided (used) by financing activities		(70,979)		(10,920)		122,791
Net change in cash, cash equivalents, and restricted cash (2)		(42,660)		(5,453)	[2]	(18,120)	[2]
Cash, cash equivalents, and restricted cash at beginning of year (2)	[2]	215,947	[3]	221,400		239,520
Cash, cash equivalents, and restricted cash at end of year (2)		173,287		215,947	[2],[3]	221,400	[2]
Parent Company [Member]
Cash flows from operating activities:
Net cash provided by operating activities (1)		19,024		22,233	[4]	10,654	[4]
Equity securities, not held for trading:
Proceeds from sales and capital returns		355		743	[4]	583	[4]
Purchases		(220)		(215)	[4]	(314)	[4]
Loans:
Net repayments from (advances to) subsidiaries		(7)		(35,876)		3,174
Capital notes and term loans made to subsidiaries		(2,441)		(73,729)		(32,641)
Principal collected on notes/loans made to subsidiaries		756		69,286		15,164
Net decrease (increase) in investment in subsidiaries		2,407		(2,029)		(606)
Other, net		109		113		18
Net cash provided (used) by investing activities		959		(17,875)		(15,965)
Cash flows from financing activities:
Net increase (decrease) in short-term borrowings and indebtedness to subsidiaries		12,467		(8,685)		789
Long-term debt:
Proceeds from issuance		1,876		22,217		34,362
Repayment		(9,162)		(13,709)		(15,096)
Preferred stock:
Proceeds from issuance		0		677		2,101
Redeemed		(2,150)		0		0
Cash dividends paid		(1,622)		(1,629)		(1,566)
Common stock:
Proceeds from issuance		632		1,211		1,415
Stock tendered for payment of withholding taxes		(331)		(393)		(494)
Repurchased		(20,633)		(9,908)		(8,116)
Cash dividends paid		(7,692)		(7,480)		(7,472)
Other, net		(248)		(138)		(118)
Net cash provided (used) by financing activities		(26,863)		(17,837)		5,805
Net change in cash, cash equivalents, and restricted cash (2)		(6,880)		(13,479)	[5]	494	[5]
Cash, cash equivalents, and restricted cash at beginning of year (2)	[5]	23,181		36,660		36,166
Cash, cash equivalents, and restricted cash at end of year (2)		16,301		23,181	[5]	36,660	[5]
Parent Company [Member] | Subsidiary Banks [Member]
Available-for-sale debt securities:
Proceeds from sales		0		8,658		0
Prepayments and maturities (1)		0		10,250		15,000
Purchases		0		(3,900)		(15,000)
Common stock:
Cash, cash equivalents, and restricted cash at beginning of year (2)	[6]	23,180
Cash, cash equivalents, and restricted cash at end of year (2)		16,301		23,180	[6]
Parent Company [Member] | Nonaffiliates [Member]
Available-for-sale debt securities:
Proceeds from sales		0		8,824	[4]	5,201	[4]
Purchases		0		0		$ (6,544)
Common stock:
Cash, cash equivalents, and restricted cash at beginning of year (2)	[6]	1
Cash, cash equivalents, and restricted cash at end of year (2)		$ 0		$ 1	[6]
[1]	(1)Financial information for the prior periods has been revised to reflect presentation changes made in connection with our 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]	(2)Financial information has been revised to reflect the impact of our 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.
[3]	(1)Financial information has been revised to reflect the impact of our 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.
[4]	(1)Financial information for the prior period has been revised to reflect presentation changes made in connection with our 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]	(2)Financial information has been revised to reflect the impact of our 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 restricted cash. See Note 1 (Summary of Significant Accounting Policies) for more information.
[6]	(1)Financial information has been revised to reflect the impact of our 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 restricted cash. See Note 1 (Summary of Significant Accounting Policies) for more information.

Regulatory and Agency Capital_3

Regulatory and Agency Capital Requirements (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Wells Fargo & Company [Member] | Advanced Approach [Member]
Regulatory capital:
Common Equity Tier One Capital	$ 146,363	$ 154,765
Tier 1	167,866	178,209
Total	198,798	210,333
Assets:
Risk-weighted	1,177,350	1,199,545
Adjusted average	$ 1,850,299	$ 1,905,568
Regulatory capital ratios:
Common Equity Tier One Capital Ratio	12.43%	12.90%
Tier 1 capital	14.26%	14.86%
Total capital	16.89%	17.53%
Tier 1 leverage	9.07%	9.35%
Wells Fargo & Company [Member] | Standardized Approach [Member]
Regulatory capital:
Common Equity Tier One Capital	$ 146,363	$ 154,765
Tier 1	167,866	178,209
Total	207,041	220,097
Assets:
Risk-weighted	1,247,210	1,260,663
Adjusted average	$ 1,850,299	$ 1,905,568
Regulatory capital ratios:
Common Equity Tier One Capital Ratio	11.74%	12.28%
Tier 1 capital	13.46%	14.14%
Total capital	16.60%	17.46%
Tier 1 leverage	9.07%	9.35%
Wells Fargo Bank, NA [Member] | Advanced Approach [Member]
Regulatory capital:
Common Equity Tier One Capital	$ 142,685	$ 143,292
Tier 1	142,685	143,292
Total	155,558	156,661
Assets:
Risk-weighted	1,058,653	1,090,360
Adjusted average	$ 1,652,009	$ 1,708,828
Regulatory capital ratios:
Common Equity Tier One Capital Ratio	13.48%	13.14%
Tier 1 capital	13.48%	13.14%
Total capital	14.69%	14.37%
Tier 1 leverage	8.64%	8.39%
Wells Fargo Bank, NA [Member] | Standardized Approach [Member]
Regulatory capital:
Common Equity Tier One Capital	$ 142,685	$ 143,292
Tier 1	142,685	143,292
Total	163,380	165,734
Assets:
Risk-weighted	1,154,182	1,169,863
Adjusted average	$ 1,652,009	$ 1,708,828
Regulatory capital ratios:
Common Equity Tier One Capital Ratio	12.36%	12.25%
Tier 1 capital	12.36%	12.25%
Total capital	14.16%	14.17%
Tier 1 leverage	8.64%	8.39%

Regulatory and Agency Capital_4

Regulatory and Agency Capital Requirements Minimum Required Regulatory Capital Ratios – Transition Requirements (Details)	Dec. 31, 2018	Dec. 31, 2017
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Capital Conservation Buffer	1.875%
GSIB Surcharge	1.50%
Wells Fargo & 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%