Regions Financial (RF) 10-Q 8 Nov 17 2017 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2017	Nov. 06, 2017
Document Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	Q3
Trading Symbol	RF
Entity Registrant Name	REGIONS FINANCIAL CORP
Entity Central Index Key	1,281,761
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		1,159,971,493

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Assets
Cash and due from banks	$ 1,829	$ 1,853
Interest-bearing deposits in other banks	1,932	3,583
Federal funds sold and securities purchased under agreements to resell	0	15
Trading account securities	193	124
Securities held to maturity	1,703	1,362
Securities available for sale	23,659	23,781
Loans held for sale	388	718
Loans, net of unearned income	79,356	80,095
Allowance for loan losses	(1,041)	(1,091)
Net loans	78,315	79,004
Other earning assets	1,421	1,644
Premises and equipment, net	2,057	2,096
Interest receivable	319	319
Goodwill	4,904	4,904
Residential mortgage servicing rights at fair value	335	324
Other identifiable intangible assets	187	221
Other assets	6,029	6,020
Total assets	123,271	125,968
Deposits:
Non-interest-bearing	37,293	36,046
Interest-bearing	60,298	62,989
Total deposits	97,591	99,035
Borrowed funds:
Other short-term borrowings	600	0
Total short-term borrowings	600	0
Long-term borrowings	6,102	7,763
Total borrowed funds	6,702	7,763
Other liabilities	2,354	2,506
Total liabilities	106,647	109,304
Stockholders’ equity:
Preferred stock	820	820
Common stock	12	13
Additional paid-in capital	16,344	17,092
Retained earnings	1,279	666
Treasury stock, at cost	(1,377)	(1,377)
Accumulated other comprehensive income (loss), net	(454)	(550)
Total stockholders’ equity	16,624	16,664
Total liabilities and stockholders’ equity	$ 123,271	$ 125,968

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Securities held to maturity, estimated fair value	$ 1,720	$ 1,369
Loans held for sale	$ 307	$ 447
Common Stock, Par or Stated Value Per Share (in dollars per share)	$ 0.01	$ 0.01
Common Stock, Shares Authorized	3,000,000,000	3,000,000,000
Common Stock, Shares, Issued	1,206,139,664	1,255,839,866
Treasury Stock, Shares	41,259,320	41,259,319
Preferred Stock, Shares Authorized	10,000,000	10,000,000
Preferred Stock, Par Value Per Share (in dollars per share)	$ 1	$ 1
Noncumulative Preferred Stock [Member]
Preferred Stock, liquidation preference per share (in dollars per share)	$ 1,000	$ 1,000
Preferred Stock, shares issued	1,000,000	1,000,000

CONSOLIDATED STATEMENTS OF INCO

CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Millions, $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Interest income, including other financing income on:
Loans, including fees		$ 827	$ 763	$ 2,401	$ 2,293
Securities - taxable		149	135	448	427
Loans held for sale		3	4	11	11
Trading account securities		1	0	3	4
Other earning assets		12	9	33	27
Operating lease assets		21	31	72	95
Total interest income, including other financing income		1,013	942	2,968	2,857
Interest expense on:
Deposits		42	31	114	86
Short-term Borrowings		2	0	4	0
Long-term borrowings		53	51	153	148
Total interest expense		97	82	271	234
Depreciation expense on operating lease assets		18	25	58	78
Total interest expense and depreciation expense on operating lease assets		115	107	329	312
Net interest income and other financing income		898	835	2,639	2,545
Provision for loan losses		76	29	194	214
Net interest income and other financing income after provision for loan losses		822	806	2,445	2,331
Non-interest income:
Service charges on deposit accounts		175	166	512	491
Card and ATM fees		103	105	311	299
Investment management and trust fee income		58	54	171	156
Mortgage income		32	46	113	130
Securities gains (losses), net		8	0	9	1
Other		139	228	434	554
Total non-interest income		515	599	1,550	1,631
Non-interest expense:
Salaries and employee benefits		483	486	1,458	1,441
Net occupancy expense		91	87	262	259
Furniture and equipment expense		84	80	249	237
Other		228	281	703	781
Total non-interest expense		886	934	2,672	2,718
Income from continuing operations before income taxes		451	471	1,323	1,244
Income tax expense		139	152	400	380
Income from continuing operations		312	319	923	864
Discontinued operations:
Income (loss) from discontinued operations before income taxes		(1)	2	9	7
Income tax expense (benefit)		0	1	4	3
Income (loss) from discontinued operations, net of tax		(1)	1	5	4
Net income		311	320	928	868
Net Income (Loss) from Continuing Operations Available to Common Shareholders, Basic		296	303	875	816
Net income available to common shareholders		$ 295	$ 304	$ 880	$ 820
Weighted-average number of shares outstanding:
Basic (in shares)		1,182	1,246	1,197	1,266
Diluted (in shares)		1,193	1,252	1,209	1,270
Earnings per common share from continuing operations:
Basic (in dollars per share)	[1]	$ 0.25	$ 0.24	$ 0.73	$ 0.64
Diluted (in dollars per share)	[1]	0.25	0.24	0.72	0.64
Earnings per common share:
Basic (in dollars per share)	[1]	0.25	0.24	0.74	0.65
Diluted (in dollars per share)	[1]	0.25	0.24	0.73	0.65
Cash dividends declared per common share (in dollars per share)		$ 0.09	$ 0.065	$ 0.225	$ 0.19
[1]	Certain per share amounts may not appear to reconcile due to rounding.

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 311	$ 320	$ 928	$ 868
Unrealized losses on securities transferred to held to maturity:
Unrealized losses on securities transferred to held to maturity during the period, net of tax	0	0	0	0
Less: Reclassification Adjustments for Amortization of Unrealized Losses on Securities Transferred to Held to Maturity, Net of Tax	(1)	(5)	(4)	(12)
Net change in unrealized losses on securities transferred to held to maturity, net of tax	1	5	4	12
Unrealized gains (losses) on securities available for sale:
Unrealized holding gains (losses) arising during the period on securities available for sale (net of tax)	23	(13)	75	295
Less: reclassification adjustments for securities gains (losses) realized in net income (net of tax)	2	0	3	1
Net change in unrealized gains (losses) on securities available for sale, net of tax	21	(13)	72	294
Unrealized gains (losses) on derivative instruments designated as cash flow hedges:
Unrealized holding gains (losses) on derivatives arising during the period (net of tax)	6	(18)	39	231
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax	10	22	43	68
Net change in unrealized gains (losses) on derivative instruments, net of tax	(4)	(40)	(4)	163
Defined benefit pension plans and other post employment benefits:
Net actuarial gains (losses) arising during the period (net of tax)	0	(1)	(1)	(1)
Less: reclassification adjustments for amortization of actuarial loss and settlements realized in net income (net of tax)	(7)	(6)	(25)	(17)
Net change from defined benefit pension plans and other post employment benefits, net of tax	7	5	24	16
Other comprehensive income (loss), net of tax	25	(43)	96	485
Comprehensive income	$ 336	$ 277	$ 1,024	$ 1,353

CONSOLIDATED STATEMENTS OF COM6

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Statement of Comprehensive Income [Abstract]
Unrealized losses on securities transferred to held to maturity during the period, tax	$ 0	$ 0	$ 0	$ 0
Amortization of unrealized losses on securities transferred to held to maturity, tax	(1)	(4)	(3)	(8)
Unrealized holding gains (losses) on available for sale securities, tax	16	(7)	47	180
Reclassification adjustments for securities gains (losses) realized in net income, tax	2	0	2	0
Unrealized holding gains (losses) on derivatives, tax	4	(12)	24	141
Reclassification adjustments for derivative gains (losses) realized in net income, tax	7	13	27	41
Net actuarial gains and losses arising during the period, tax	0	0	0	1
Reclassification adjustments for amortization of actuarial loss and settlements realized in net income, and other, tax	$ (4)	$ (3)	$ (14)	$ (9)

CONSOLIDATED STATEMENTS OF CHAN

CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) shares in Millions, $ in Millions	Total	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Treasury Stock, At Cost [Member]	Accumulated Other Comprehensive Income (Loss), Net [Member]
Beginning Balance Outstanding (in shares) at Dec. 31, 2015		1	1,297
Beginning Balance at Dec. 31, 2015	$ 16,844	$ 820	$ 13	$ 17,883	$ (115)	$ (1,377)	$ (380)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	868				868
Amortization of unrealized losses on securities transferred to held to maturity, net of tax	12						12
Net change in unrealized gains and losses on securities available for sale, net of tax and reclassification adjustment	294						294
Net change in unrealized gains and losses on derivative instruments, net of tax and reclassification adjustment	163						163
Net change from employee benefit plans, net of tax	16						16
Cash dividends declared	(240)				(240)
Preferred stock dividends	(48)				(48)
Impact of share repurchase, shares			(65)
Impact of share repurchases, value	(569)			(569)
Impact of stock transaction under compensation plans, net, shares			4
Impact of stock transaction under compensation plans, net	25			25
Ending Balance Outstanding (in shares) at Sep. 30, 2016		1	1,236
Ending Balance at Sep. 30, 2016	17,365	$ 820	$ 13	17,339	465	(1,377)	105
Beginning Balance Outstanding (in shares) at Dec. 31, 2016		1	1,214
Beginning Balance at Dec. 31, 2016	16,664	$ 820	$ 13	17,092	666	(1,377)	(550)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	928				928
Amortization of unrealized losses on securities transferred to held to maturity, net of tax	4						4
Net change in unrealized gains and losses on securities available for sale, net of tax and reclassification adjustment	72						72
Net change in unrealized gains and losses on derivative instruments, net of tax and reclassification adjustment	(4)						(4)
Net change from employee benefit plans, net of tax	24						24
Cash dividends declared	(267)				(267)
Preferred stock dividends	(48)				(48)
Impact of share repurchase, shares			(54)
Impact of share repurchases, value	(775)		$ (1)	(774)
Impact of stock transaction under compensation plans, net, shares			5
Impact of stock transaction under compensation plans, net	26			26
Ending Balance Outstanding (in shares) at Sep. 30, 2017		1	1,165
Ending Balance at Sep. 30, 2017	$ 16,624	$ 820	$ 12	$ 16,344	$ 1,279	$ (1,377)	$ (454)

CONSOLIDATED STATEMENTS OF CHA8

CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (Parenthetical) - $ / shares	3 Months Ended						9 Months Ended
	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Sep. 30, 2017	Sep. 30, 2016
Statement of Stockholders' Equity [Abstract]
Cash dividend declared (in dollars per share)	$ 0.09	$ 0.07	$ 0.065	$ 0.065	$ 0.065	$ 0.06	$ 0.225	$ 0.19

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Operating activities:
Net income	$ 928	$ 868
Adjustments to reconcile net income to net cash from operating activities:
Provision for loan losses	194	214
Depreciation, amortization and accretion, net	410	425
Securities (gains) losses, net	(9)	(1)
Deferred income tax expense	63	18
Originations and purchases of loans held for sale	(2,667)	(2,767)
Proceeds from sales of loans held for sale	3,074	2,711
(Gain) loss on sale of loans, net	(78)	(95)
Net change in operating assets and liabilities:
Trading account securities	(55)	23
Other earning assets	165	69
Interest receivable and other assets	(85)	28
Other liabilities	(9)	157
Other	36	104
Net cash from operating activities	1,967	1,754
Investing activities:
Proceeds from maturities of securities held to maturity	152	522
Proceeds from sales of securities available for sale	722	1,873
Proceeds from maturities of securities available for sale	2,747	3,325
Proceeds from trading account securities	37	0
Purchases of securities available for sale	(3,395)	(6,108)
Purchases of securities held to maturity	(494)	0
Proceeds from sales of loans	45	86
Purchases of loans	(153)	(779)
Purchases of mortgage servicing rights	(40)	(35)
Net change in loans	498	720
Net purchases of other assets	(81)	(107)
Net cash from investing activities	38	(503)
Financing activities:
Net change in deposits	(1,444)	859
Net change in short-term borrowings	600	(10)
Proceeds from long-term borrowings	2,844	1,607
Payments on long-term borrowings	(4,504)	(3,910)
Cash dividends on common stock	(346)	(236)
Cash dividends on preferred stock	(48)	(48)
Repurchases of common stock	(775)	(569)
Payments Related to Tax Withholding for Share-based Compensation	(22)	(14)
Proceeds from (Payments for) Other Financing Activities	0	(6)
Net cash from financing activities	(3,695)	(2,327)
Net change in cash and cash equivalents	(1,690)	(1,076)
Cash and cash equivalents at beginning of year	5,451	5,314
Cash and cash equivalents at end of period	$ 3,761	$ 4,238

Basis of Presentation

Basis of Presentation	9 Months Ended
	Sep. 30, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	BASIS OF PRESENTATION Regions Financial Corporation (“Regions” or the "Company”) provides a full range of banking and bank-related services to individual and corporate customers through its subsidiaries and branch offices located across the South, Midwest and Texas. The Company competes with other financial institutions located in the states in which it operates, as well as other adjoining states. Regions is subject to the regulations of certain government agencies and undergoes periodic examinations by certain regulatory authorities. The accounting and reporting policies of Regions and the methods of applying those policies that materially affect the consolidated financial statements conform with GAAP and with general financial services industry practices. The accompanying interim financial statements have been prepared in accordance with the instructions for Form 10-Q and, therefore, do not include all information and notes to the consolidated financial statements necessary for a complete presentation of financial position, results of operations, comprehensive income and cash flows in conformity with GAAP. In the opinion of management, all adjustments, consisting of normal and recurring items, necessary for the fair presentation of the consolidated financial statements have been included. These interim financial statements should be read in conjunction with the consolidated financial statements and notes thereto in Regions’ Annual Report on Form 10-K for the year ended December 31, 2016 . Regions has evaluated all subsequent events for potential recognition and disclosure through the filing date of this Form 10-Q. On January 11, 2012, Regions entered into an agreement to sell Morgan Keegan and related affiliates. The transaction closed on April 2, 2012. See Note 2 and Note 14 for further details. Results of operations for the entities sold are presented separately as discontinued operations for all periods presented on the consolidated statements of income. This presentation is consistent with the consolidated financial statements included in the Annual Report on Form 10-K for the year ended December 31, 2016 .

Discontinued Operations

Discontinued Operations	9 Months Ended
	Sep. 30, 2017
Discontinued Operations and Disposal Groups [Abstract]
Discontinued Operations	DISCONTINUED OPERATIONS On January 11, 2012, Regions entered into a stock purchase agreement to sell Morgan Keegan and related affiliates to Raymond James. The transaction closed on April 2, 2012. Regions Investment Management, Inc. (formerly known as Morgan Asset Management, Inc.) and Regions Trust were not included in the sale. In connection with the closing of the sale, Regions agreed to indemnify Raymond James for all litigation matters related to pre-closing activities. See Note 14 for related disclosure. The following table represents the condensed results of operations for discontinued operations: Three Months Ended Nine Months Ended 2017 2016 2017 2016 (In millions, except per share data) Non-interest expense: Professional and legal expenses/(recoveries) $ 1 $ (2 ) $ (10 ) $ (8 ) Other — — 1 1 Total non-interest expense 1 (2 ) (9 ) (7 ) Income (loss) from discontinued operations before income taxes (1 ) 2 9 7 Income tax expense (benefit) — 1 4 3 Income (loss) from discontinued operations, net of tax $ (1 ) $ 1 $ 5 $ 4 Earnings (loss) per common share from discontinued operations: Basic $ (0.00 ) $ 0.00 $ 0.00 $ 0.00 Diluted $ (0.00 ) $ 0.00 $ 0.00 $ 0.00

Securities

Securities	9 Months Ended
	Sep. 30, 2017
Investments, Debt and Equity Securities [Abstract]
Securities	SECURITIES The amortized cost, gross unrealized gains and losses, and estimated fair value of securities held to maturity and securities available for sale are as follows: September 30, 2017 Recognized in OCI (1) Not Recognized in OCI Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Carrying Value Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value (In millions) Securities held to maturity: Mortgage-backed securities: Residential agency $ 1,096 $ — $ (42 ) $ 1,054 $ 16 $ (3 ) $ 1,067 Commercial agency 653 — (4 ) 649 6 (2 ) 653 $ 1,749 $ — $ (46 ) $ 1,703 $ 22 $ (5 ) $ 1,720 Securities available for sale: U.S. Treasury securities $ 307 $ 1 $ — $ 308 $ 308 Federal agency securities 24 — — 24 24 Mortgage-backed securities: Residential agency 17,573 89 (178 ) 17,484 17,484 Residential non-agency 3 — — 3 3 Commercial agency 3,630 14 (18 ) 3,626 3,626 Commercial non-agency 803 7 (1 ) 809 809 Corporate and other debt securities 1,179 28 (5 ) 1,202 1,202 Equity securities 193 10 — 203 203 $ 23,712 $ 149 $ (202 ) $ 23,659 $ 23,659 December 31, 2016 Recognized in OCI (1) Not Recognized in OCI Amortized Gross Unrealized Gains Gross Unrealized Losses Carrying Value Gross Gross Estimated (In millions) Securities held to maturity: Mortgage-backed securities: Residential agency $ 1,249 $ — $ (49 ) $ 1,200 $ 12 $ (3 ) $ 1,209 Commercial agency 167 — (5 ) 162 — (2 ) 160 $ 1,416 $ — $ (54 ) $ 1,362 $ 12 $ (5 ) $ 1,369 Securities available for sale: U.S. Treasury securities $ 303 $ 1 $ (1 ) $ 303 $ 303 Federal agency securities 35 — — 35 35 Obligations of states and political subdivisions 1 — — 1 1 Mortgage-backed securities: Residential agency 17,531 95 (255 ) 17,371 17,371 Residential non-agency 4 — — 4 4 Commercial agency 3,486 9 (32 ) 3,463 3,463 Commercial non-agency 1,124 8 (3 ) 1,129 1,129 Corporate and other debt securities 1,272 19 (17 ) 1,274 1,274 Equity securities 194 7 — 201 201 $ 23,950 $ 139 $ (308 ) $ 23,781 $ 23,781 _________ (1) The gross unrealized losses recognized in OCI on securities held to maturity resulted from a transfer of securities available for sale to held to maturity in the second quarter of 2013. Securities with carrying values of $8.6 billion and $11.6 billion at September 30, 2017 and December 31, 2016 , respectively, were pledged to secure public funds, trust deposits and certain borrowing arrangements. Included within total pledged securities is approximately $50 million of encumbered U.S. Treasury securities at both September 30, 2017 and December 31, 2016 . The amortized cost and estimated fair value of securities held to maturity and securities available for sale at September 30, 2017 , by contractual maturity, are shown below. Expected maturities will differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. Amortized Cost Estimated Fair Value (In millions) Securities held to maturity: Mortgage-backed securities: Residential agency $ 1,096 $ 1,067 Commercial agency 653 653 $ 1,749 $ 1,720 Securities available for sale: Due in one year or less $ 37 $ 37 Due after one year through five years 761 771 Due after five years through ten years 570 581 Due after ten years 142 145 Mortgage-backed securities: Residential agency 17,573 17,484 Residential non-agency 3 3 Commercial agency 3,630 3,626 Commercial non-agency 803 809 Equity securities 193 203 $ 23,712 $ 23,659 The following tables present gross unrealized losses and the related estimated fair value of securities held to maturity and available for sale at September 30, 2017 and December 31, 2016 . For securities transferred to held to maturity from available for sale, the analysis in the tables below is comparing the securities' original amortized cost to its current estimated fair value. These securities are segregated between investments that have been in a continuous unrealized loss position for less than twelve months and for twelve months or more. September 30, 2017 Less Than Twelve Months Twelve Months or More Total Estimated Fair Value Gross Unrealized Losses Estimated Fair Value Gross Unrealized Losses Estimated Fair Value Gross Unrealized Losses (In millions) Securities held to maturity: Mortgage-backed securities: Residential agency $ 752 $ (18 ) $ 315 $ (11 ) $ 1,067 $ (29 ) Commercial agency — — 153 (6 ) 153 (6 ) $ 752 $ (18 ) $ 468 $ (17 ) $ 1,220 $ (35 ) Securities available for sale: U.S. Treasury securities $ 80 $ — $ 18 $ — $ 98 $ — Mortgage-backed securities: Residential agency 10,060 (139 ) 1,519 (39 ) 11,579 (178 ) Commercial agency 1,490 (15 ) 164 (3 ) 1,654 (18 ) Commercial non-agency 175 (1 ) 30 — 205 (1 ) All other securities 164 (1 ) 104 (4 ) 268 (5 ) $ 11,969 $ (156 ) $ 1,835 $ (46 ) $ 13,804 $ (202 ) December 31, 2016 Less Than Twelve Months Twelve Months or More Total Estimated Gross Estimated Gross Estimated Gross (In millions) Securities held to maturity: Mortgage-backed securities: Residential agency $ 850 $ (26 ) $ 359 $ (14 ) $ 1,209 $ (40 ) Commercial agency — — 160 (7 ) 160 (7 ) $ 850 $ (26 ) $ 519 $ (21 ) $ 1,369 $ (47 ) Securities available for sale: U.S. Treasury securities $ 112 $ (1 ) $ 18 $ — $ 130 $ (1 ) Mortgage-backed securities: Residential agency 12,071 (245 ) 570 (10 ) 12,641 (255 ) Commercial agency 2,199 (31 ) 45 (1 ) 2,244 (32 ) Commercial non-agency 402 (2 ) 176 (1 ) 578 (3 ) All other securities 382 (6 ) 218 (11 ) 600 (17 ) $ 15,166 $ (285 ) $ 1,027 $ (23 ) $ 16,193 $ (308 ) The number of individual positions in an unrealized loss position in the tables above decreased from 1,613 at December 31, 2016 to 1,392 at September 30, 2017 . The decrease in the number of securities and the total amount of unrealized losses from year-end 2016 was primarily due to changes in market interest rates. In instances where an unrealized loss existed, there was no indication of an adverse change in credit on the underlying positions in the tables above. As it relates to these positions, management believes no individual unrealized loss, other than those discussed below, represented an OTTI as of those dates. The Company does not intend to sell, and it is not more likely than not that the Company will be required to sell, the positions before the recovery of their amortized cost basis, which may be at maturity. As part of the Company's normal process for evaluating OTTI, management did identify a limited number of positions where an OTTI was believed to exist as of September 30, 2017 . For the nine months ended September 30, 2017 , such impairments were immaterial. Gross realized gains and gross realized losses on sales of securities available for sale, as well as OTTI losses, are shown in the table below. The cost of securities sold is based on the specific identification method. Three Months Ended September 30 Nine Months Ended September 30 2017 2016 2017 2016 (In millions) Gross realized gains $ 5 $ 1 $ 9 $ 30 Gross realized losses — (1 ) (3 ) (28 ) OTTI (1 ) — (1 ) (1 ) Securities available for sale gains (losses), net (1) $ 4 $ — $ 5 $ 1 ________ (1) The securities gains (losses), net balances above exclude net trading securities gains of $4 million recognized during the third quarter of 2017.

Loans and the Allowance for Cre

Loans and the Allowance for Credit Losses	9 Months Ended
	Sep. 30, 2017
Receivables [Abstract]
Loans and the Allowance for Credit Losses	LOANS AND THE ALLOWANCE FOR CREDIT LOSSES LOANS The following table presents the distribution of Regions' loan portfolio by segment and class, net of unearned income: September 30, 2017 December 31, 2016 (In millions, net of unearned income) Commercial and industrial $ 35,443 $ 35,012 Commercial real estate mortgage—owner-occupied 6,284 6,867 Commercial real estate construction—owner-occupied 335 334 Total commercial 42,062 42,213 Commercial investor real estate mortgage 3,999 4,087 Commercial investor real estate construction 1,936 2,387 Total investor real estate 5,935 6,474 Residential first mortgage 13,903 13,440 Home equity 10,276 10,687 Indirect—vehicles 3,489 4,040 Indirect—other consumer 1,318 920 Consumer credit card 1,214 1,196 Other consumer 1,159 1,125 Total consumer 31,359 31,408 $ 79,356 $ 80,095 During the three months ended September 30, 2017 , Regions purchased approximately $6 million in indirect-other consumer loans from third parties. During the three months ended September 30, 2016, Regions purchased approximately $200 million in indirect-vehicles and indirect-other consumer loans from third parties. During the nine months ended September 30, 2017 and 2016 , the comparable loan purchase amounts were approximately $153 million and $779 million , respectively. At September 30, 2017 , $21.7 billion in securities and net eligible loans held by Regions were pledged to secure current and potential borrowings from the FHLB. At September 30, 2017 , an additional $22.0 billion in net eligible loans held by Regions were pledged to the FRB for potential borrowings. ALLOWANCE FOR CREDIT LOSSES Regions determines the appropriate level of the allowance on a quarterly basis. Refer to Note 1 “Summary of Significant Accounting Policies” to the consolidated financial statements to the Annual Report on Form 10-K for the year ended December 31, 2016 , for a description of the methodology. ROLLFORWARD OF ALLOWANCE FOR CREDIT LOSSES The following tables present analyses of the allowance for credit losses by portfolio segment for the three and nine months ended September 30, 2017 and 2016 . The total allowance for loan losses and the related loan portfolio ending balances are disaggregated to detail the amounts derived through individual evaluation and collective evaluation for impairment. The allowance for loan losses related to individually evaluated loans is attributable to reserves for non-accrual commercial and investor real estate loans and all TDRs. The allowance for loan losses and the loan portfolio ending balances related to collectively evaluated loans is attributable to the remainder of the portfolio. Three Months Ended September 30, 2017 Commercial Investor Real Estate Consumer Total (In millions) Allowance for loan losses, July 1, 2017 $ 707 $ 82 $ 252 $ 1,041 Provision (credit) for loan losses 8 (8 ) 76 76 Loan losses: Charge-offs (43 ) — (63 ) (106 ) Recoveries 11 3 16 30 Net loan losses (32 ) 3 (47 ) (76 ) Allowance for loan losses, September 30, 2017 683 77 281 1,041 Reserve for unfunded credit commitments, July 1, 2017 63 4 — 67 Provision (credit) for unfunded credit losses (8 ) — — (8 ) Reserve for unfunded credit commitments, September 30, 2017 55 4 — 59 Allowance for credit losses, September 30, 2017 $ 738 $ 81 $ 281 $ 1,100 Three Months Ended September 30, 2016 Commercial Investor Real Estate Consumer Total (In millions) Allowance for loan losses, July 1, 2016 $ 825 $ 87 $ 239 $ 1,151 Provision (credit) for loan losses (15 ) (7 ) 51 29 Loan losses: Charge-offs (31 ) (1 ) (62 ) (94 ) Recoveries 19 5 16 40 Net loan losses (12 ) 4 (46 ) (54 ) Allowance for loan losses, September 30, 2016 798 84 244 1,126 Reserve for unfunded credit commitments, July 1, 2016 59 5 — 64 Provision (credit) for unfunded credit losses 8 — — 8 Reserve for unfunded credit commitments, September 30, 2016 67 5 — 72 Allowance for credit losses, September 30, 2016 $ 865 $ 89 $ 244 $ 1,198 Nine Months Ended September 30, 2017 Commercial Investor Real Estate Consumer Total (In millions) Allowance for loan losses, January 1, 2017 $ 753 $ 85 $ 253 $ 1,091 Provision (credit) for loan losses 41 (16 ) 169 194 Loan losses: Charge-offs (139 ) (2 ) (188 ) (329 ) Recoveries 28 10 47 85 Net loan losses (111 ) 8 (141 ) (244 ) Allowance for loan losses, September 30, 2017 683 77 281 1,041 Reserve for unfunded credit commitments, January 1, 2017 64 5 — 69 Provision (credit) for unfunded credit losses (9 ) (1 ) — (10 ) Reserve for unfunded credit commitments, September 30, 2017 55 4 — 59 Allowance for credit losses, September 30, 2017 $ 738 $ 81 $ 281 $ 1,100 Portion of ending allowance for loan losses: Individually evaluated for impairment $ 202 $ 19 $ 52 $ 273 Collectively evaluated for impairment 481 58 229 768 Total allowance for loan losses $ 683 $ 77 $ 281 $ 1,041 Portion of loan portfolio ending balance: Individually evaluated for impairment $ 898 $ 108 $ 727 $ 1,733 Collectively evaluated for impairment 41,164 5,827 30,632 77,623 Total loans evaluated for impairment $ 42,062 $ 5,935 $ 31,359 $ 79,356 Nine Months Ended September 30, 2016 Commercial Investor Real Estate Consumer Total (In millions) Allowance for loan losses, January 1, 2016 $ 758 $ 97 $ 251 $ 1,106 Provision (credit) for loan losses 108 (21 ) 127 214 Loan losses: Charge-offs (102 ) (2 ) (184 ) (288 ) Recoveries 34 10 50 94 Net loan losses (68 ) 8 (134 ) (194 ) Allowance for loan losses, September 30, 2016 798 84 244 1,126 Reserve for unfunded credit commitments, January 1, 2016 47 5 — 52 Provision (credit) for unfunded credit losses 20 — — 20 Reserve for unfunded credit commitments, September 30, 2016 67 5 — 72 Allowance for credit losses, September 30, 2016 $ 865 $ 89 $ 244 $ 1,198 Portion of ending allowance for loan losses: Individually evaluated for impairment $ 252 $ 19 $ 62 $ 333 Collectively evaluated for impairment 546 65 182 793 Total allowance for loan losses $ 798 $ 84 $ 244 $ 1,126 Portion of loan portfolio ending balance: Individually evaluated for impairment $ 1,119 $ 140 $ 785 $ 2,044 Collectively evaluated for impairment 41,625 6,624 30,590 78,839 Total loans evaluated for impairment $ 42,744 $ 6,764 $ 31,375 $ 80,883 PORTFOLIO SEGMENT RISK FACTORS The following describe the risk characteristics relevant to each of the portfolio segments. Commercial —The commercial loan portfolio segment includes commercial and industrial loans to commercial customers for use in normal business operations to finance working capital needs, equipment purchases or other expansion projects. Commercial also includes owner-occupied commercial real estate mortgage loans to operating businesses, which are loans for long-term financing of land and buildings, and are repaid by cash flow generated by business operations. Owner-occupied construction loans are made to commercial businesses for the development of land or construction of a building where the repayment is derived from revenues generated from the business of the borrower. Collection risk in this portfolio is driven by the creditworthiness of underlying borrowers, particularly cash flow from customers’ business operations, and the sensitivity to market fluctuations in commodity prices. Investor Real Estate —Loans for real estate development are repaid through cash flow related to the operation, sale or refinance of the property. This portfolio segment includes extensions of credit to real estate developers or investors where repayment is dependent on the sale of real estate or income generated from the real estate collateral. A portion of Regions’ investor real estate portfolio segment consists of loans secured by residential product types (land, single-family and condominium loans) within Regions’ markets. Additionally, these loans are made to finance income-producing properties such as apartment buildings, office and industrial buildings, and retail shopping centers. Loans in this portfolio segment are particularly sensitive to the valuation of real estate. Consumer —The consumer loan portfolio segment includes residential first mortgage, home equity, indirect-vehicles, indirect-other consumer, consumer credit card, and other consumer loans. Residential first mortgage loans represent loans to consumers to finance a residence. These loans are typically financed over a 15 to 30 year term and, in most cases, are extended to borrowers to finance their primary residence. Home equity lending includes both home equity loans and lines of credit. This type of lending, which is secured by a first or second mortgage on the borrower’s residence, allows customers to borrow against the equity in their home. Real estate market values as of the time the loan or line is secured directly affect the amount of credit extended and, in addition, changes in these values impact the depth of potential losses. Indirect-vehicles lending, which is lending initiated through third-party business partners, largely consists of loans made through automotive dealerships. Indirect-other consumer lending represents other point of sale lending through third parties. Consumer credit card includes Regions branded consumer credit card accounts. Other consumer loans include other revolving consumer accounts, direct consumer loans, and overdrafts. Loans in this portfolio segment are sensitive to unemployment and other key consumer economic measures. CREDIT QUALITY INDICATORS The following tables present credit quality indicators for the loan portfolio segments and classes, excluding loans held for sale, as of September 30, 2017 , and December 31, 2016 . Commercial and investor real estate loan portfolio segments are detailed by categories related to underlying credit quality and probability of default. Regions assigns these categories at loan origination and reviews the relationship utilizing a risk-based approach on, at minimum, an annual basis or at any time management becomes aware of information affecting the borrowers' ability to fulfill their obligations. Both quantitative and qualitative factors are considered in this review process. These categories are utilized to develop the associated allowance for credit losses. • Pass—includes obligations where the probability of default is considered low; • Special Mention—includes obligations that have potential weakness that may, if not reversed or corrected, weaken the credit or inadequately protect the Company’s position at some future date. Obligations in this category may also be subject to economic or market conditions that may, in the future, have an adverse effect on debt service ability; • Substandard Accrual—includes obligations that exhibit a well-defined weakness that presently jeopardizes debt repayment, even though they are currently performing. These obligations are characterized by the distinct possibility that the Company may incur a loss in the future if these weaknesses are not corrected; • Non-accrual—includes obligations where management has determined that full payment of principal and interest is in doubt. Substandard accrual and non-accrual loans are often collectively referred to as “classified.” Special mention, substandard accrual, and non-accrual loans are often collectively referred to as “criticized and classified.” Classes in the consumer portfolio segment are disaggregated by accrual status. September 30, 2017 Pass Special Mention Substandard Accrual Non-accrual Total (In millions) Commercial and industrial $ 33,323 $ 627 $ 1,000 $ 493 $ 35,443 Commercial real estate mortgage—owner-occupied 5,780 178 186 140 6,284 Commercial real estate construction—owner-occupied 315 6 8 6 335 Total commercial $ 39,418 $ 811 $ 1,194 $ 639 $ 42,062 Commercial investor real estate mortgage $ 3,729 $ 128 $ 137 $ 5 $ 3,999 Commercial investor real estate construction 1,888 2 46 — 1,936 Total investor real estate $ 5,617 $ 130 $ 183 $ 5 $ 5,935 Accrual Non-accrual Total (In millions) Residential first mortgage $ 13,858 $ 45 $ 13,903 Home equity 10,206 70 10,276 Indirect—vehicles 3,488 1 3,489 Indirect—other consumer 1,318 — 1,318 Consumer credit card 1,214 — 1,214 Other consumer 1,159 — 1,159 Total consumer $ 31,243 $ 116 $ 31,359 $ 79,356 December 31, 2016 Pass Special Mention Substandard Accrual Non-accrual Total (In millions) Commercial and industrial $ 32,619 $ 658 $ 1,112 $ 623 $ 35,012 Commercial real estate mortgage—owner-occupied 6,190 221 246 210 6,867 Commercial real estate construction—owner-occupied 308 8 15 3 334 Total commercial $ 39,117 $ 887 $ 1,373 $ 836 $ 42,213 Commercial investor real estate mortgage $ 3,766 $ 190 $ 114 $ 17 $ 4,087 Commercial investor real estate construction 2,192 129 66 — 2,387 Total investor real estate $ 5,958 $ 319 $ 180 $ 17 $ 6,474 Accrual Non-accrual Total (In millions) Residential first mortgage $ 13,390 $ 50 $ 13,440 Home equity 10,595 92 10,687 Indirect—vehicles 4,040 — 4,040 Indirect—other consumer 920 — 920 Consumer credit card 1,196 — 1,196 Other consumer 1,125 — 1,125 Total consumer $ 31,266 $ 142 $ 31,408 $ 80,095 AGING ANALYSIS The following tables include an aging analysis of DPD for each portfolio segment and class as of September 30, 2017 and December 31, 2016 : September 30, 2017 Accrual Loans 30-59 DPD 60-89 DPD 90+ DPD Total 30+ DPD Total Accrual Non-accrual Total (In millions) Commercial and industrial $ 26 $ 20 $ 5 $ 51 $ 34,950 $ 493 $ 35,443 Commercial real estate mortgage—owner-occupied 16 4 4 24 6,144 140 6,284 Commercial real estate construction—owner-occupied — — — — 329 6 335 Total commercial 42 24 9 75 41,423 639 42,062 Commercial investor real estate mortgage 7 — — 7 3,994 5 3,999 Commercial investor real estate construction 29 — — 29 1,936 — 1,936 Total investor real estate 36 — — 36 5,930 5 5,935 Residential first mortgage 90 59 174 323 13,858 45 13,903 Home equity 59 30 33 122 10,206 70 10,276 Indirect—vehicles 45 13 9 67 3,488 1 3,489 Indirect—other consumer 8 5 — 13 1,318 — 1,318 Consumer credit card 11 7 16 34 1,214 — 1,214 Other consumer 12 4 4 20 1,159 — 1,159 Total consumer 225 118 236 579 31,243 116 31,359 $ 303 $ 142 $ 245 $ 690 $ 78,596 $ 760 $ 79,356 December 31, 2016 Accrual Loans 30-59 DPD 60-89 DPD 90+ DPD Total 30+ DPD Total Accrual Non-accrual Total (In millions) Commercial and industrial $ 59 $ 11 $ 6 $ 76 $ 34,389 $ 623 $ 35,012 Commercial real estate mortgage—owner-occupied 29 7 2 38 6,657 210 6,867 Commercial real estate construction—owner-occupied 1 — — 1 331 3 334 Total commercial 89 18 8 115 41,377 836 42,213 Commercial investor real estate mortgage 6 8 — 14 4,070 17 4,087 Commercial investor real estate construction — — — — 2,387 — 2,387 Total investor real estate 6 8 — 14 6,457 17 6,474 Residential first mortgage 99 63 212 374 13,390 50 13,440 Home equity 60 22 33 115 10,595 92 10,687 Indirect—vehicles 56 14 10 80 4,040 — 4,040 Indirect—other consumer 5 3 — 8 920 — 920 Consumer credit card 9 7 15 31 1,196 — 1,196 Other consumer 13 5 5 23 1,125 — 1,125 Total consumer 242 114 275 631 31,266 142 31,408 $ 337 $ 140 $ 283 $ 760 $ 79,100 $ 995 $ 80,095 IMPAIRED LOANS The following tables present details related to the Company’s impaired loans as of September 30, 2017 and December 31, 2016 . Loans deemed to be impaired include all TDRs and all non-accrual commercial and investor real estate loans, excluding leases. Loans that have been fully charged-off do not appear in the tables below. Non-accrual Impaired Loans As of September 30, 2017 Book Value (3) Unpaid Principal Balance (1) Charge-offs and Payments Applied (2) Total Impaired Loans on Non-accrual Status Impaired Loans on Non-accrual Status with No Related Allowance Impaired Loans on Non-accrual Status with Related Allowance Related Allowance for Loan Losses Coverage % (4) (Dollars in millions) Commercial and industrial $ 599 $ 110 $ 489 $ 60 $ 429 $ 124 39.1 % Commercial real estate mortgage—owner-occupied 156 16 140 12 128 38 34.6 Commercial real estate construction—owner-occupied 6 — 6 — 6 2 33.3 Total commercial 761 126 635 72 563 164 38.1 Commercial investor real estate mortgage 6 1 5 1 4 2 50.0 Total investor real estate 6 1 5 1 4 2 50.0 Residential first mortgage 28 1 27 — 27 3 14.3 Home equity 11 1 10 — 10 — 9.1 Total consumer 39 2 37 — 37 3 12.8 $ 806 $ 129 $ 677 $ 73 $ 604 $ 169 37.0 % Accruing Impaired Loans As of September 30, 2017 Unpaid Principal Balance (1) Charge-offs and Payments Applied (2) Book Value (3) Related Allowance for Loan Losses Coverage % (4) (Dollars in millions) Commercial and industrial $ 207 $ 6 $ 201 $ 32 18.4 % Commercial real estate mortgage—owner-occupied 64 3 61 6 14.1 Commercial real estate construction—owner-occupied 1 — 1 — — Total commercial 272 9 263 38 17.3 Commercial investor real estate mortgage 77 2 75 12 18.2 Commercial investor real estate construction 29 1 28 5 20.7 Total investor real estate 106 3 103 17 18.9 Residential first mortgage 418 — 418 45 10.8 Home equity 263 1 262 4 1.9 Indirect—vehicles — — — — — Consumer credit card 1 — 1 — — Other consumer 9 — 9 — — Total consumer 691 1 690 49 7.2 $ 1,069 $ 13 $ 1,056 $ 104 10.9 % Total Impaired Loans As of September 30, 2017 Book Value (3) Unpaid Principal Balance (1) Charge-offs and Payments Applied (2) Total Impaired Loans Impaired Loans with No Related Allowance Impaired Loans with Related Allowance Related Allowance for Loan Losses Coverage % (4) (Dollars in millions) Commercial and industrial $ 806 $ 116 $ 690 $ 60 $ 630 $ 156 33.7 % Commercial real estate mortgage—owner-occupied 220 19 201 12 189 44 28.6 Commercial real estate construction—owner-occupied 7 — 7 — 7 2 28.6 Total commercial 1,033 135 898 72 826 202 32.6 Commercial investor real estate mortgage 83 3 80 1 79 14 20.5 Commercial investor real estate construction 29 1 28 — 28 5 20.7 Total investor real estate 112 4 108 1 107 19 20.5 Residential first mortgage 446 1 445 — 445 48 11.0 Home equity 274 2 272 — 272 4 2.2 Indirect—vehicles — — — — — — — Consumer credit card 1 — 1 — 1 — — Other consumer 9 — 9 — 9 — — Total consumer 730 3 727 — 727 52 7.5 $ 1,875 $ 142 $ 1,733 $ 73 $ 1,660 $ 273 22.1 % Non-accrual Impaired Loans As of December 31, 2016 Book Value (3) Unpaid Principal Balance (1) Charge-offs and Payments Applied (2) Total Impaired Loans on Non-accrual Status Impaired Loans on Non-accrual Status with No Related Allowance Impaired Loans on Non-accrual Status with Related Allowance Related Allowance for Loan Losses Coverage % (4) (Dollars in millions) Commercial and industrial $ 685 $ 72 $ 613 $ 126 $ 487 $ 138 30.7 % Commercial real estate mortgage—owner-occupied 231 21 210 39 171 53 32.0 Commercial real estate construction—owner-occupied 4 1 3 — 3 2 75.0 Total commercial 920 94 826 165 661 193 31.2 Commercial investor real estate mortgage 18 1 17 5 12 5 33.3 Total investor real estate 18 1 17 5 12 5 33.3 Residential first mortgage 41 12 29 — 29 4 39.0 Home equity 12 1 11 — 11 — 8.3 Total consumer 53 13 40 — 40 4 32.1 $ 991 $ 108 $ 883 $ 170 $ 713 $ 202 31.3 % Accruing Impaired Loans As of December 31, 2016 Unpaid Principal Balance (1) Charge-offs and Payments Applied (2) Book Value (3) Related Allowance for Loan Losses Coverage % (4) (Dollars in millions) Commercial and industrial $ 187 $ 1 $ 186 $ 33 18.2 % Commercial real estate mortgage—owner-occupied 60 4 56 5 15.0 Commercial real estate construction—owner-occupied 1 — 1 — — Total commercial 248 5 243 38 17.3 Commercial investor real estate mortgage 82 8 74 7 18.3 Commercial investor real estate construction 16 — 16 1 6.3 Total investor real estate 98 8 90 8 16.3 Residential first mortgage 435 10 425 51 14.0 Home equity 292 — 292 5 1.7 Indirect—vehicles 1 — 1 — — Consumer credit card 2 — 2 — — Other consumer 10 — 10 — — Total consumer 740 10 730 56 8.9 $ 1,086 $ 23 $ 1,063 $ 102 11.5 % Total Impaired Loans As of December 31, 2016 Book Value (3) Unpaid Principal Balance (1) Charge-offs and Payments Applied (2) Total Impaired Loans Impaired Loans with No Related Allowance Impaired Loans with Related Allowance Related Allowance for Loan Losses Coverage % (4) (Dollars in millions) Commercial and industrial $ 872 $ 73 $ 799 $ 126 $ 673 $ 171 28.0 % Commercial real estate mortgage—owner-occupied 291 25 266 39 227 58 28.5 Commercial real estate construction—owner-occupied 5 1 4 — 4 2 60.0 Total commercial 1,168 99 1,069 165 904 231 28.3 Commercial investor real estate mortgage 100 9 91 5 86 12 21.0 Commercial investor real estate construction 16 — 16 — 16 1 6.3 Total investor real estate 116 9 107 5 102 13 19.0 Residential first mortgage 476 22 454 — 454 55 16.2 Home equity 304 1 303 — 303 5 2.0 Indirect—vehicles 1 — 1 — 1 — — Consumer credit card 2 — 2 — 2 — — Other consumer 10 — 10 — 10 — — Total consumer 793 23 770 — 770 60 10.5 $ 2,077 $ 131 $ 1,946 $ 170 $ 1,776 $ 304 20.9 % ________ (1) Unpaid principal balance represents the contractual obligation due from the customer and includes the net book value plus charge-offs and payments applied. (2) Charge-offs and payments applied represents cumulative partial charge-offs taken, as well as interest payments received that have been applied against the outstanding principal balance. (3) Book value represents the unpaid principal balance less charge-offs and payments applied; it is shown before any allowance for loan losses. (4) Coverage % represents charge-offs and payments applied plus the related allowance as a percent of the unpaid principal balance. The following table presents the average balances of total impaired loans and interest income for the three and nine months ended September 30, 2017 and 2016 . Interest income recognized represents interest on accruing loans modified in a TDR. Three Months Ended September 30 Nine Months Ended September 30 2017 2016 2017 2016 Average Balance Interest Income Recognized Average Balance Interest Income Recognized Average Balance Interest Income Recognized Average Balance Interest Income Recognized (In millions) Commercial and industrial $ 748 $ 3 $ 816 $ 1 $ 804 $ 9 $ 670 $ 4 Commercial real estate mortgage—owner-occupied 209 2 296 1 234 4 313 3 Commercial real estate construction—owner-occupied 5 — 4 — 5 — 3 — Total commercial 962 5 1,116 2 1,043 13 986 7 Commercial investor real estate mortgage 93 1 117 1 87 3 128 4 Commercial investor real estate construction 40 1 36 1 42 2 31 1 Total investor real estate 133 2 153 2 129 5 159 5 Residential first mortgage 448 4 464 4 454 12 473 12 Home equity 275 4 317 3 285 11 328 12 Consumer credit card 2 — 2 — 2 — 2 — Other consumer 9 — 11 1 10 — 12 1 Total consumer 734 8 794 8 751 23 815 25 Total impaired loans $ 1,829 $ 15 $ 2,063 $ 12 $ 1,923 $ 41 $ 1,960 $ 37 TROUBLED DEBT RESTRUCTURINGS Regions regularly modifies commercial and investor real estate loans in order to facilitate a workout strategy. Similarly, Regions works to meet the individual needs of consumer borrowers to stem foreclosure through its CAP. Refer to Note 6 "Allowance For Credit Losses" in the 2016 Annual Report on Form 10-K for additional information regarding the Company's TDRs. None of the modified consumer loans listed in the following TDR disclosures were collateral-dependent at the time of modification. At September 30, 2017 , approximately $15 million in residential first mortgage TDRs were in excess of 180 days past due and were considered collateral-dependent. At September 30, 2017 , approximately $5 million in home equity first lien TDRs were in excess of 180 days past due and approximately $2 million in home equity second lien TDRs were in excess of 120 days past due, both of which were considered collateral-dependent. Further discussion related to TDRs, including their impact on the allowance for loan losses and designation of TDRs in periods subsequent to the modification is included in Note 1 "Summary of Significant Accounting Policies" in the 2016 Annual Report on Form 10-K. The following tables present the end of period balance for loans modified in a TDR during the periods presented by portfolio segment and class, and the financial impact of those modifications. The tables include modifications made to new TDRs, as well as renewals of existing TDRs. Loans first reported as TDRs during the nine months ended September 30, 2017 and 2016 totaled approximately $456 million and $347 million , respectively. Three Months Ended September 30, 2017 Financial Impact of Modifications Considered TDRs Number of Obligors Recorded Investment Increase in Allowance at Modification (Dollars in millions) Commercial and industrial 37 $ 157 $ 2 Commercial real estate mortgage—owner-occupied 33 32 1 Total commercial 70 189 3 Commercial investor real estate mortgage 8 45 2 Total investor real estate 8 45 2 Residential first mortgage 67 9 1 Home equity 10 1 — Consumer credit card 11 — — Indirect—vehicles and other consumer 38 1 — Total consumer 126 11 1 204 $ 245 $ 6 Three Months Ended September 30, 2016 Financial Impact of Modifications Considered TDRs Number of Obligors Recorded Investment Increase in Allowance at Modification (Dollars in millions) Commercial and industrial 47 $ 117 $ 2 Commercial real estate mortgage—owner-occupied 22 26 1 Total commercial 69 143 3 Commercial investor real estate mortgage 19 27 — Commercial investor real estate construction 3 25 1 Total investor real estate 22 52 1 Residential first mortgage 51 9 1 Home equity 57 2 — Consumer credit card 14 1 — Indirect—vehicles and other consumer 47 1 — Total consumer 169 13 1 260 $ 208 $ 5 Nine Months Ended September 30, 2017 Financial Impact Number of Recorded Increase in (Dollars in millions) Commercial and industrial 106 $ 449 $ 9 Commercial real estate mortgage—owner-occupied 94 97 3 Commercial real estate construction—owner-occupied 3 2 — Total commercial 203 548 12 Commercial investor real estate mortgage 33 93 3 Commercial investor real estate construction 5 70 2 Total investor real estate 38 163 5 Residential first mortgage 168 34 4 Home equity 101 8 — Consumer credit card 54 — — Indirect—vehicles and other consumer 125 2 — Total consumer 448 44 4 689 $ 755 $ 21 Nine Months Ended September 30, 2016 Financial Impact Number of Recorded Increase in (Dollars in millions) Commercial and industrial 142 $ 298 $ 8 Commercial real estate mortgage—owner-occupied 98 60 2 Total commercial 240 358 10 Commercial investor real estate mortgage 68 87 1 Commercial investor real estate construction 8 36 1 Total investor real estate 76 123 2 Residential first mortgage 189 38 5 Home equity 263 13 — Consumer credit card 65 1 — Indirect—vehicles and other consumer 148 2 — Total consumer 665 54 5 981 $ 535 $ 17 Defaulted TDRs The following table presents, by portfolio segment and class, TDRs that defaulted during the three and nine months ended September 30, 2017 and 2016 , and that were modified in the previous twelve months (i.e., the twelve months prior to the default). For purposes of this disclosure, default is defined as placement on non-accrual status for the commercial and investor real estate portfolio segments, and 90 days past due and still accruing for the consumer portfolio segment. Consideration of defaults in the calculation of the allowance for loan losses is described in detail in the consolidated financial statements included in the Annual Report on Form 10-K for the year ended December 31, 2016 . Three Months Ended September 30 Nine Months Ended September 30 2017 2016 2017 2016 (In millions) Defaulted During the Period, Where Modified in a TDR Twelve Months Prior to Default Commercial and industrial $ 1 $ 16 $ 9 $ 28 Commercial real estate mortgage—owner-occupied 1 1 1 2 Total commercial 2 17 10 30 Commercial investor real estate mortgage — 1 — 2 Commercial investor real estate construction — 1 — 1 Total investor real estate — 2 — 3 Residential first mortgage 1 7 6 18 Home equity — — 1 1 Total consumer 1 7 7 19 $ 3 $ 26 $ 17 $ 52 Commercial and investor real estate loans that were on non-accrual status at the time of the latest modification are not included in the default table above, as they are already considered to be in default at the time of the restructuring. At September 30, 2017 , approximately $93 million of commercial and investor real estate loans modified in a TDR during the three months ended September 30, 2017 were on non-accrual status. An immaterial amount was 90 days past due. At September 30, 2017 , Regions had restructured binding unfunded commitments totaling $20 million where a concession was granted and the borrower was in financial difficulty.

Servicing of Financial Assets

Servicing of Financial Assets	9 Months Ended
	Sep. 30, 2017
Transfers and Servicing of Financial Assets [Abstract]
Servicing of Financial Assets	SERVICING OF FINANCIAL ASSETS RESIDENTIAL MORTGAGE BANKING ACTIVITIES The fair value of residential MSRs is calculated using various assumptions including future cash flows, market discount rates, expected prepayment rates, servicing costs and other factors. A significant change in prepayments of mortgages in the servicing portfolio could result in significant changes in the valuation adjustments, thus creating potential volatility in the carrying amount of residential MSRs. The Company compares fair value estimates and assumptions to observable market data where available, and also considers recent market activity and actual portfolio experience. The table below presents an analysis of residential MSRs under the fair value measurement method: Three Months Ended September 30 Nine Months Ended September 30 2017 2016 2017 2016 (In millions) Carrying value, beginning of period $ 346 $ 216 $ 324 $ 252 Additions 10 34 56 73 Increase (decrease) in fair value (1) : Due to change in valuation inputs or assumptions (9 ) (2 ) (12 ) (60 ) Economic amortization associated with borrower repayments (12 ) (10 ) (33 ) (27 ) Carrying value, end of period $ 335 $ 238 $ 335 $ 238 ________ (1) "Economic amortization associated with borrower repayments" includes both total loan payoffs as well as partial paydowns. On February 29, 2016, the Company purchased the rights to service approximately $2.6 billion in residential mortgage loans for approximately $24 million . On September 1, 2016, the Company purchased the rights to service approximately $2.8 billion in residential mortgage loans for approximately $22 million . On April 28, 2017, the Company purchased the rights to service approximately $2.7 billion in residential mortgage loans for approximately $30 million . Data and assumptions used in the fair value calculation, as well as the valuation’s sensitivity to rate fluctuations, related to residential MSRs (excluding related derivative instruments) are as follows: September 30 2017 2016 (Dollars in millions) Unpaid principal balance $ 32,586 $ 29,657 Weighted-average prepayment speed (CPR; percentage) 10.0 % 12.3 % Estimated impact on fair value of a 10% increase $ (22 ) $ (13 ) Estimated impact on fair value of a 20% increase $ (40 ) $ (24 ) Option-adjusted spread (basis points) 860 1,060 Estimated impact on fair value of a 10% increase $ (11 ) $ (9 ) Estimated impact on fair value of a 20% increase $ (23 ) $ (18 ) Weighted-average coupon interest rate 4.1 % 4.2 % Weighted-average remaining maturity (months) 282 280 Weighted-average servicing fee (basis points) 27.4 27.6 The sensitivity calculations above are hypothetical and should not be considered to be predictive of future performance. Changes in fair value based on adverse changes in assumptions generally cannot be extrapolated because the relationship of the change in assumption to the change in fair value may not be linear. Also, the effect of an adverse variation in a particular assumption on the fair value of residential MSRs is calculated without changing any other assumption, while in reality changes in one factor may result in changes in another, which may either magnify or counteract the effect of the change. The derivative instruments utilized by Regions would serve to reduce the estimated impacts to fair value included in the table above. The following table presents servicing related fees, which includes contractually specified servicing fees, late fees and other ancillary income resulting from the servicing of residential mortgage loans: Three Months Ended September 30 Nine Months Ended September 30 2017 2016 2017 2016 (In millions) Servicing related fees and other ancillary income $ 24 $ 21 $ 71 $ 63 Residential mortgage loans are sold in the secondary market with standard representations and warranties regarding certain characteristics such as the quality of the loan, the absence of fraud, the eligibility of the loan for sale and the future servicing associated with the loan. Regions may be required to repurchase these loans at par, or make-whole or indemnify the purchasers for losses incurred when representations and warranties are breached. Regions maintains an immaterial repurchase liability related to residential mortgage loans sold with representations and warranty provisions. This repurchase liability is reported in other liabilities on the consolidated balance sheets and reflects management’s estimate of losses based on historical repurchase and loss trends, as well as other factors that may result in anticipated losses different from historical loss trends. Adjustments to this reserve are recorded in other non-interest expense on the consolidated statements of income. COMMERCIAL MORTGAGE BANKING ACTIVITIES On July 18, 2014, Regions was approved as a Fannie Mae DUS lender and acquired a DUS servicing portfolio totaling approximately $1.0 billion . The Fannie Mae DUS program provides liquidity to the multi-family housing market. As part of the transaction, Regions recorded $12 million in commercial MSRs and $15 million in intangible assets associated with the DUS license purchased. Regions also assumed a loss share guarantee associated with the purchased portfolio and any future originations. Regions estimated the fair value of the loss share guarantee to be approximately $4 million . See Note 1 "Summary of Significant Accounting Policies" in the 2016 Annual Report on Form 10-K for additional information. Also see Note 14 herein for additional information related to the guarantee. As of September 30, 2017 and December 31, 2016 , the DUS servicing portfolio was approximately $2.6 billion and $1.8 billion , respectively. The related commercial MSRs were valued at approximately $42 million and $30 million at September 30, 2017 and December 31, 2016 , respectively. The estimated fair value of the loss share guarantee was valued at approximately $4 million at both September 30, 2017 and December 31, 2016 .

Goodwill

Goodwill	9 Months Ended
	Sep. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	GOODWILL Goodwill allocated to each reportable segment (each a reporting unit) is presented as follows: September 30, 2017 December 31, 2016 (In millions) Corporate Bank $ 2,474 $ 2,474 Consumer Bank 1,978 1,978 Wealth Management 452 452 $ 4,904 $ 4,904 Regions evaluates each reporting unit’s goodwill for impairment on an annual basis in the fourth quarter, or more often if events or circumstances change that would more likely than not reduce the fair value of a reporting unit below its carrying value. A detailed description of the Company’s methodology and valuation approaches used to determine the estimated fair value of each reporting unit is included in the consolidated financial statements of the Annual Report on Form 10-K for the year ended December 31, 2016. Adverse changes in the economic environment, declining operations, or other factors could result in a decline in the implied fair value of goodwill. During the third quarter of 2017, Regions assessed events and circumstances for all three reporting units as of September 30, 2017 , and through the date of the filing of this Quarterly Report on Form 10-Q that could potentially indicate goodwill impairment. The indicators assessed included: • Recent operating performance, • Changes in market capitalization, • Regulatory actions and assessments, • Changes in the business climate (including legislation, legal factors, and competition), • Company-specific factors (including changes in key personnel, asset impairments, and business dispositions), and • Trends in the banking industry. After assessing the indicators noted above, Regions determined that it was not more likely than not that the fair value of each of its reporting units had declined below their carrying value as of September 30, 2017 . Therefore, Regions determined that a test of goodwill impairment was not required for each of Regions’ reporting units for the September 30, 2017 interim period.

Stockholders' Equity and Accumu

Stockholders' Equity and Accumulated Other Comprehensive Income (Loss)	9 Months Ended
	Sep. 30, 2017
Equity [Abstract]
Stockholders' Equity and Accumulated Other Comprehensive Income (Loss)	STOCKHOLDERS’ EQUITY AND ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) PREFERRED STOCK The following table presents a summary of the non-cumulative perpetual preferred stock: September 30, 2017 December 31, 2016 Issuance Date Earliest Redemption Date Dividend Rate Liquidation Amount Carrying Amount Carrying Amount (Dollars in millions) Series A 11/1/2012 12/15/2017 6.375 % $ 500 $ 387 $ 387 Series B 4/29/2014 9/15/2024 6.375 % (1) 500 433 433 $ 1,000 $ 820 $ 820 _________ (1) Dividends, if declared, will be paid quarterly at an annual rate equal to (i) for each period beginning prior to September 15, 2024, 6.375% , and (ii) for each period beginning on or after September 15, 2024, three-month LIBOR plus 3.536% . For each preferred stock issuance listed above, Regions issued depositary shares, each representing a 1/40th ownership interest in a share of the Company's preferred stock, with a liquidation preference of $1,000.00 per share of preferred stock (equivalent to $25.00 per depositary share). Dividends on the preferred stock, if declared, accrue and are payable quarterly in arrears. The preferred stock has no stated maturity and redemption is solely at Regions' option, subject to regulatory approval, in whole, or in part, after the earliest redemption date or in whole, but not in part, within 90 days following a regulatory capital treatment event for the Series A preferred stock or at any time following a regulatory capital treatment event for the Series B preferred stock. The Board of Directors declared $24 million in cash dividends on Series A Preferred Stock during the first nine months of 2017 and 2016. Series B Preferred Stock dividends were also $24 million for the first nine months of 2017 and 2016. In the event Series A and Series B preferred shares are redeemed at the liquidation amounts, $113 million and $67 million excess of the redemption amount over the carrying amount will be recognized, respectively. Approximately $100 million of Series A preferred dividends that were recorded as a reduction of preferred stock, including related surplus, will be recorded as a reduction to retained earnings, and approximately $13 million of related issuance costs that were recorded as a reduction of preferred stock, including related surplus, will be recorded as a reduction to net income available to common shareholders. Approximately $52 million of Series B preferred dividends that were recorded as a reduction of preferred stock, including related surplus, will be recorded as a reduction to retained earnings, and approximately $15 million of related issuance costs that were recorded as a reduction of preferred stock, including related surplus, will be recorded as a reduction to net income available to common shareholders. COMMON STOCK On June 28, 2017, Regions received no objection from the Federal Reserve to its 2017 capital plan that was submitted as part of the CCAR process, which included the repurchase of common shares and a common stock dividend increase. As part of the Company's capital plan, the Board authorized a new $1.47 billion common stock repurchase plan, permitting repurchases from the beginning of the third quarter of 2017 through the second quarter of 2018. The capital plan also included a proposed increase of the quarterly common stock dividend to $0.09 per common share beginning in the third quarter of 2017, subject to quarterly Board approval. The Board declared a $0.07 per share and $0.09 per share cash dividend on common stock for the second and third quarters of 2017, respectively, as compared to $0.065 per common share for the first quarter of 2017, totaling $0.225 per common share for the first nine months of 2017. The Board declared a $0.065 per share cash dividend on common stock for the second and third quarters of 2016 as compared to $0.06 per common share for the first quarter of 2016, totaling $0.19 per common share for the first nine months of 2016. As of September 30, 2017, Regions had repurchased approximately 34.6 million shares of common stock at a total cost of approximately $500 million . The Company continued to repurchase shares under this plan in the fourth quarter of 2017, and as of November 7, 2017, Regions had additional repurchases of approximately 7.8 million shares of common stock at a total cost of approximately $122.4 million . All of these shares were immediately retired upon repurchase and, therefore, will not be included in treasury stock. ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) Activity within the balances in accumulated other comprehensive income (loss), net is shown in the following tables: Three Months Ended September 30, 2017 Unrealized losses on securities transferred to held to maturity Unrealized gains (losses) on securities available for sale Unrealized gains (losses) on derivative instruments designated as cash flow hedges Defined benefit pension plans and other post employment benefits Accumulated other comprehensive income (loss), net of tax (In millions) Beginning of period $ (30 ) $ (55 ) $ 11 $ (405 ) $ (479 ) Net change 1 21 (4 ) 7 25 End of period $ (29 ) $ (34 ) $ 7 $ (398 ) $ (454 ) Three Months Ended September 30, 2016 Unrealized losses on securities transferred to held to maturity Unrealized gains (losses) on securities available for sale Unrealized gains (losses) on derivative instruments designated as cash flow hedges Defined benefit pension plans and other post employment benefits Accumulated other comprehensive (In millions) Beginning of period $ (40 ) $ 297 $ 278 $ (387 ) $ 148 Net change 5 (13 ) (40 ) 5 (43 ) End of period $ (35 ) $ 284 $ 238 $ (382 ) $ 105 Nine Months Ended September 30, 2017 Unrealized losses on securities transferred to held to maturity Unrealized gains (losses) on securities available for sale Unrealized gains (losses) on derivative instruments designated as cash flow hedges Defined benefit pension plans and other post employment benefits Accumulated other comprehensive (In millions) Beginning of period $ (33 ) $ (106 ) $ 11 $ (422 ) $ (550 ) Net change 4 72 (4 ) 24 96 End of period $ (29 ) $ (34 ) $ 7 $ (398 ) $ (454 ) Nine Months Ended September 30, 2016 Unrealized losses on securities transferred to held to maturity Unrealized gains (losses) on securities available for sale Unrealized gains (losses) on derivative instruments designated as cash flow hedges Defined benefit pension plans and other post employment benefits Accumulated other comprehensive (In millions) Beginning of period $ (47 ) $ (10 ) $ 75 $ (398 ) $ (380 ) Net change 12 294 163 16 485 End of period $ (35 ) $ 284 $ 238 $ (382 ) $ 105 The following table presents amounts reclassified out of accumulated other comprehensive income (loss) for the three and nine months ended September 30, 2017 and 2016 : Three Months Ended September 30, 2017 Three Months Ended September 30, 2016 Details about Accumulated Other Comprehensive Income (Loss) Components Amount Reclassified from Accumulated Other Comprehensive Income (Loss) (1) Amount Reclassified from Accumulated Other Comprehensive Income (Loss) (1) Affected Line Item in the Consolidated Statements of Income (In millions) Unrealized losses on securities transferred to held to maturity: $ (2 ) $ (9 ) Net interest income and other financing income 1 4 Tax (expense) or benefit $ (1 ) $ (5 ) Net of tax Unrealized gains and (losses) on available for sale securities: $ 4 $ — Securities gains (losses), net (2 ) — Tax (expense) or benefit $ 2 $ — Net of tax Gains and (losses) on cash flow hedges: Interest rate contracts $ 17 $ 35 Net interest income and other financing income (7 ) (13 ) Tax (expense) or benefit $ 10 $ 22 Net of tax Amortization of defined benefit pension plans and other post employment benefits: Actuarial gains (losses) and settlements $ (11 ) $ (9 ) (2) (11 ) (9 ) Total before tax 4 3 Tax (expense) or benefit $ (7 ) $ (6 ) Net of tax Total reclassifications for the period $ 4 $ 11 Net of tax Nine Months Ended September 30, 2017 Nine Months Ended September 30, 2016 Details about Accumulated Other Comprehensive Income (Loss) Components Amount Reclassified from Accumulated Other Comprehensive Income (Loss) (1) Amount Reclassified from Accumulated Other Comprehensive Income (Loss) (1) Affected Line Item in the Consolidated Statements of Income (In millions) Unrealized losses on securities transferred to held to maturity: $ (7 ) $ (20 ) Net interest income and other financing income 3 8 Tax (expense) or benefit $ (4 ) $ (12 ) Net of tax Unrealized gains and (losses) on available for sale securities: $ 5 $ 1 Securities gains (losses), net (2 ) — Tax (expense) or benefit $ 3 $ 1 Net of tax Gains and (losses) on cash flow hedges: Interest rate contracts $ 70 $ 109 Net interest income and other financing income (27 ) (41 ) Tax (expense) or benefit $ 43 $ 68 Net of tax Amortization of defined benefit pension plans and other post employment benefits: Actuarial gains (losses) and settlements $ (39 ) $ (26 ) (2) (39 ) (26 ) Total before tax 14 9 Tax (expense) or benefit $ (25 ) $ (17 ) Net of tax Total reclassifications for the period $ 17 $ 40 Net of tax ________ (1) Amounts in parentheses indicate reductions to net income. (2) These accumulated other comprehensive income (loss) components are included in the computation of net periodic pension cost and are included in salaries and employee benefits on the consolidated statements of income (see Note 10 for additional details).

Earnings (Loss) Per Common Shar

Earnings (Loss) Per Common Share	9 Months Ended
	Sep. 30, 2017
Earnings Per Share [Abstract]
Earnings (Loss) Per Common Share	EARNINGS (LOSS) PER COMMON SHARE The following table sets forth the computation of basic earnings (loss) per common share and diluted earnings (loss) per common share: Three Months Ended September 30 Nine Months Ended September 30 2017 2016 2017 2016 (In millions, except per share amounts) Numerator: Income from continuing operations $ 312 $ 319 $ 923 $ 864 Preferred stock dividends (16 ) (16 ) (48 ) (48 ) Income from continuing operations available to common shareholders 296 303 875 816 Income (loss) from discontinued operations, net of tax (1 ) 1 5 4 Net income available to common shareholders $ 295 $ 304 $ 880 $ 820 Denominator: Weighted-average common shares outstanding—basic 1,182 1,246 1,197 1,266 Potential common shares 11 6 12 4 Weighted-average common shares outstanding—diluted 1,193 1,252 1,209 1,270 Earnings per common share from continuing operations available to common shareholders (1) : Basic $ 0.25 $ 0.24 $ 0.73 $ 0.64 Diluted 0.25 0.24 0.72 0.64 Earnings (loss) per common share from discontinued operations (1) : Basic $ (0.00 ) $ 0.00 $ 0.00 $ 0.00 Diluted (0.00 ) 0.00 0.00 0.00 Earnings per common share (1) : Basic $ 0.25 $ 0.24 $ 0.74 $ 0.65 Diluted 0.25 0.24 0.73 0.65 ________ (1) Certain per share amounts may not appear to reconcile due to rounding. The effect from the assumed exercise of 14 million and 15 million stock options, restricted stock units and awards and performance stock units for the three and nine months ended September 30, 2017 , respectively, was not included in the above computations of diluted earnings per common share because such amounts would have had an antidilutive effect on earnings per common share. The effect from the assumed exercise of 27 million and 29 million stock options for the three and nine months ended September 30, 2016 , respectively, was not included in the above computations of diluted earnings per common share because such amounts would have had an antidilutive effect on earnings per common share.

Share-Based Payments

Share-Based Payments	9 Months Ended
	Sep. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Share-Based Payments	SHARE-BASED PAYMENTS Regions administers long-term incentive compensation plans that permit the granting of incentive awards in the form of stock options, restricted stock awards, performance awards and stock appreciation rights. While Regions has the ability to issue stock appreciation rights, none have been issued to date. The terms of all awards issued under these plans are determined by the Compensation Committee of the Board; however, no awards may be granted after the tenth anniversary from the date the plans were initially approved by stockholders. Incentive awards usually vest based on employee service, generally within three years from the date of the grant. The contractual lives of options granted under these plans are typically ten years from the date of the grant. On April 23, 2015, the stockholders of the Company approved the Regions Financial Corporation 2015 LTIP , which permits the Company to grant to employees and directors various forms of incentive compensation. These forms of incentive compensation are similar to the types of compensation approved in prior plans. The 2015 LTIP authorizes 60 million common share equivalents available for grant, where grants of options and grants of full value awards (e.g., shares of restricted stock, restricted stock units and performance stock units) count as one share equivalent. Unless otherwise determined by the Compensation Committee of the Board, grants of restricted stock, restricted stock units, and performance stock units accrue dividends, or their notional equivalent, as they are declared by the Board, and are paid upon vesting of the award. Upon adoption of the 2015 LTIP, Regions closed the prior long-term incentive plan to new grants, and, accordingly, prospective grants must be made under the 2015 LTIP or a successor plan. All existing grants under prior long-term incentive plans are unaffected by adoption of the 2015 LTIP. The number of remaining share equivalents available for future issuance under the 2015 LTIP was approximately 45 million at September 30, 2017 . STOCK OPTIONS The following table summarizes the activity related to stock options: Nine Months Ended September 30 2017 2016 Number of Options Weighted-Average Exercise Price Number of Options Weighted-Average Exercise Price Outstanding at beginning of period 13,455,047 $ 19.37 19,350,157 $ 21.06 Exercised (1,114,766 ) 6.66 (568,882 ) 5.86 Forfeited or expired (2,727,357 ) 34.51 (3,840,704 ) 34.68 Outstanding at end of period 9,612,924 $ 16.55 14,940,571 $ 18.14 Exercisable at end of period 9,612,924 $ 16.55 14,940,571 $ 18.14 RESTRICTED STOCK AWARDS AND PERFORMANCE STOCK AWARDS Regions periodically grants restricted stock awards that vest upon service conditions. Regions also periodically grants restricted stock awards and performance stock awards that vest based upon service conditions and performance conditions. Incremental shares earned above the performance target associated with previous performance stock awards are included when and if performance targets are achieved. Dividend payments during the vesting period are deferred to the end of the vesting term. The fair value of these restricted shares, restricted stock units and performance stock units was estimated based upon the fair value of the underlying shares on the date of the grant. The valuation was not adjusted for the deferral of dividends. The following table summarizes the activity related to restricted stock awards and performance stock awards: Nine Months Ended September 30 2017 2016 Number of Shares Weighted-Average Grant Date Fair Value Number of Shares Weighted-Average Non-vested at beginning of period 16,558,942 $ 9.31 16,374,242 $ 9.51 Granted 3,976,193 14.57 6,840,385 7.92 Vested (4,623,917 ) 11.08 (5,735,271 ) 8.25 Forfeited (522,258 ) 10.00 (686,347 ) 9.18 Non-vested at end of period 15,388,960 $ 10.12 16,793,009 $ 9.31

Pension and Other Postretiremen

Pension and Other Postretirement Benefits	9 Months Ended
	Sep. 30, 2017
Defined Benefit Plan [Abstract]
Pension and Other Postretirement Benefits	PENSION AND OTHER POSTRETIREMENT BENEFITS Effective January 1, 2016, Regions separated its defined benefit pension plan qualified under the Internal Revenue Code into two plans. The new plan was created primarily for participants who were actively employed on January 1, 2016 and all other participants were retained in the existing plan. Regions' defined benefit pension plans cover only certain employees as the pension plans are closed to new entrants.The Company also sponsors a SERP, which is a non-qualified pension plan that provides certain senior executive officers defined benefits in relation to their compensation. Net periodic pension cost, which is recorded in salaries and employee benefits on the consolidated statements of income, included the following components: Qualified Plans Non-qualified Plans Total Three Months Ended September 30 2017 2016 2017 2016 2017 2016 (In millions) Service cost $ 8 $ 9 $ 1 $ 1 $ 9 $ 10 Interest cost 18 19 1 1 19 20 Expected return on plan assets (35 ) (36 ) — — (35 ) (36 ) Amortization of actuarial loss 8 8 1 1 9 9 Settlement charge — — 2 — 2 — Net periodic pension cost (credit) $ (1 ) $ — $ 5 $ 3 $ 4 $ 3 Qualified Plans Non-qualified Plans Total Nine Months Ended September 30 2017 2016 2017 2016 2017 2016 (In millions) Service cost $ 25 $ 26 $ 3 $ 3 $ 28 $ 29 Interest cost 54 55 3 4 57 59 Expected return on plan assets (106 ) (108 ) — — (106 ) (108 ) Amortization of actuarial loss 24 24 3 2 27 26 Settlement charge — — 12 — 12 — Net periodic pension cost (credit) $ (3 ) $ (3 ) $ 21 $ 9 $ 18 $ 6 The settlement charge during the third quarter of 2017 resulted from receiving the final actuarial valuation for the settlement of liabilities under the SERP for certain plan participants that occurred during the second quarter of 2017. Regions' funding policy for the qualified plans is to contribute annually at least the amount required by IRS minimum funding standards. Regions made a contribution of $75 million for the 2017 plan during the third quarter of 2017. Regions also provides other postretirement benefits such as defined benefit health care plans and life insurance plans that cover certain retired employees. There was no material impact from other postretirement benefits on the consolidated financial statements for the nine months ended September 30, 2017 or 2016 .

Derivative Financial Instrument

Derivative Financial Instruments and Hedging Activities	9 Months Ended
	Sep. 30, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments and Hedging Activities	DERIVATIVE FINANCIAL INSTRUMENTS AND HEDGING ACTIVITIES The following tables present the notional amount and estimated fair value of derivative instruments on a gross basis as of September 30, 2017 and December 31, 2016 . The variation margin payments made during 2017 for derivatives cleared through the Chicago Mercantile Exchange are legally characterized as settlements of the derivatives. As a result, these variation margin payments are netted against the fair value of the respective derivative contracts in the balance sheet and related disclosures. September 30, 2017 December 31, 2016 Notional Amount Estimated Fair Value Notional Amount Estimated Fair Value Gain (1) Loss (1) Gain (1) Loss (1) (In millions) Derivatives in fair value hedging relationships: Interest rate swaps $ 3,130 $ 1 $ 37 $ 2,257 $ 7 $ 40 Derivatives in cash flow hedging relationships: Interest rate swaps 7,150 21 153 9,000 19 269 Total derivatives designated as hedging instruments $ 10,280 $ 22 $ 190 $ 11,257 $ 26 $ 309 Derivatives not designated as hedging instruments: Interest rate swaps $ 40,124 $ 315 $ 352 $ 41,851 $ 412 $ 467 Interest rate options 3,787 20 10 3,877 24 12 Interest rate futures and forward commitments 27,944 4 7 18,605 11 6 Other contracts 5,551 53 46 5,813 106 93 Total derivatives not designated as hedging instruments $ 77,406 $ 392 $ 415 $ 70,146 $ 553 $ 578 Total derivatives $ 87,686 $ 414 $ 605 $ 81,403 $ 579 $ 887 _________ (1) Derivatives in a gain position are recorded as other assets and derivatives in a loss position are recorded as other liabilities on the consolidated balance sheets. HEDGING DERIVATIVES Derivatives entered into to manage interest rate risk and facilitate asset/liability management strategies are designated as hedging derivatives. Derivative financial instruments that qualify in a hedging relationship are classified, based on the exposure being hedged, as either fair value hedges or cash flow hedges. See Note 1 "Summary of Significant Accounting Policies" of the Annual Report on Form 10-K for the year ended December 31, 2016 , for additional information regarding accounting policies for derivatives. FAIR VALUE HEDGES Fair value hedge relationships mitigate exposure to the change in fair value of an asset, liability or firm commitment. Regions enters into interest rate swap agreements to manage interest rate exposure on the Company’s fixed-rate borrowings, which includes long-term debt and certificates of deposit. These agreements involve the receipt of fixed-rate amounts in exchange for floating-rate interest payments over the life of the agreements. Regions enters into interest rate swap agreements to manage interest rate exposure on certain of the Company's fixed-rate available for sale debt securities. These agreements involve the payment of fixed-rate amounts in exchange for floating-rate interest receipts. CASH FLOW HEDGES Cash flow hedge relationships mitigate exposure to the variability of future cash flows or other forecasted transactions. Regions enters into interest rate swap agreements to manage overall cash flow changes related to interest rate risk exposure on LIBOR-based loans. The agreements effectively modify the Company’s exposure to interest rate risk by utilizing receive fixed/pay LIBOR interest rate swaps. Regions issues long-term fixed-rate debt for various funding needs. Regions may enter into receive LIBOR/pay fixed forward starting swaps to hedge risks of changes in the projected quarterly interest payments attributable to changes in the benchmark interest rate (LIBOR) during the time leading up to the probable issuance date of the new long-term fixed-rate debt. Regions recognized an unrealized after-tax gain of $130 million and $179 million in accumulated other comprehensive income (loss) at September 30, 2017 and 2016 , respectively, related to terminated cash flow hedges of loan instruments, which will be amortized into earnings in conjunction with the recognition of interest payments through 2025. Regions recognized pre-tax income of $16 million and $22 million during the three months ended September 30, 2017 and 2016 , respectively, and pre-tax income of $53 million and $46 million during the nine months ended September 30, 2017 and 2016 , respectively, related to the amortization of discontinued cash flow hedges of loan instruments. Regions expects to reclassify out of accumulated other comprehensive income (loss) and into earnings approximately $52 million in pre-tax income due to the receipt or payment of interest payments on all cash flow hedges within the next twelve months. Included in this amount is $56 million in pre-tax net gains related to the amortization of discontinued cash flow hedges. The maximum length of time over which Regions is hedging its exposure to the variability in future cash flows for forecasted transactions is approximately eight years as of September 30, 2017 . The following tables present the effect of hedging derivative instruments on the consolidated statements of income: Gain or (Loss) Recognized in Income on Derivatives Location of Amounts Recognized in Income on Derivatives and Related Hedged Item Gain or (Loss) Recognized in Income on Related Hedged Item Three Months Ended September 30 Three Months Ended 2017 2016 2017 2016 (In millions) (In millions) Fair Value Hedges: Interest rate swaps on: Debt/CDs $ 1 $ 2 Interest expense $ — $ — Debt/CDs (6 ) (23 ) Other non-interest expense 6 24 Securities available for sale (1 ) (2 ) Interest income — — Securities available for sale — 2 Other non-interest expense — (5 ) Total $ (6 ) $ (21 ) $ 6 $ 19 Effective Portion (3) Gain or (Loss) Recognized in AOCI (1) Location of Amounts Reclassified from AOCI into Income Gain or (Loss) Reclassified from AOCI into Income (2) Three Months Ended September 30 Three Months Ended September 30 2017 2016 2017 2016 (In millions) (In millions) Cash Flow Hedges: Interest rate swaps $ (4 ) $ (40 ) Interest income on loans $ 17 $ 35 Total $ (4 ) $ (40 ) $ 17 $ 35 Gain or (Loss) Recognized in Income on Derivatives Location of Amounts Recognized in Income on Derivatives and Related Hedged Item Gain or (Loss) Recognized in Income on Related Hedged Item Nine Months Ended Nine Months Ended 2017 2016 2017 2016 (In millions) (In millions) Fair Value Hedges: Interest rate swaps on: Debt/CDs $ 2 $ 10 Interest expense $ — $ (2 ) Debt/CDs (1 ) 4 Other non-interest expense 2 (3 ) Securities available for sale (3 ) (7 ) Interest income — — Securities available for sale (2 ) (36 ) Other non-interest expense 1 32 Total $ (4 ) $ (29 ) $ 3 $ 27 Effective Portion (3) Gain or (Loss) Recognized in AOCI (1) Location of Amounts Reclassified from AOCI into Income Gain or (Loss) Reclassified from AOCI into Income (2) Nine Months Ended September 30 Nine Months Ended September 30 2017 2016 2017 2016 (In millions) (In millions) Cash Flow Hedges: Interest rate swaps $ (4 ) $ 163 Interest income on loans $ 70 $ 109 Total $ (4 ) $ 163 $ 70 $ 109 ______ (1) After-tax (2) Pre-tax (3) All cash flow hedges were highly effective for all periods presented, and the change in fair value attributed to hedge ineffectiveness was not material. DERIVATIVES NOT DESIGNATED AS HEDGING INSTRUMENTS The Company holds a portfolio of interest rate swaps, option contracts, and futures and forward commitments that result from transactions with its commercial customers in which they manage their risks by entering into a derivative with Regions. The Company monitors and manages the net risk in this customer portfolio and enters into separate derivative contracts in order to reduce the overall exposure to pre-defined limits. For both derivatives with its end customers and derivatives Regions enters into to mitigate the risk in this portfolio, the Company is subject to market risk and the risk that the counterparty will default. The contracts in this portfolio are not designated as accounting hedges and are marked-to market through earnings (in capital markets fee income and other) and included in other assets and other liabilities, as appropriate. Regions enters into interest rate lock commitments, which are commitments to originate mortgage loans whereby the interest rate on the loan is determined prior to funding and the customers have locked into that interest rate. At September 30, 2017 and December 31, 2016 , Regions had $289 million and $274 million , respectively, in total notional amount of interest rate lock commitments. Regions manages market risk on interest rate lock commitments and mortgage loans held for sale with corresponding forward sale commitments. Residential mortgage loans held for sale are recorded at fair value with changes in fair value recorded in mortgage income. Commercial mortgage loans held for sale are recorded at either the lower of cost or market or at fair value based on management's election. At September 30, 2017 and December 31, 2016 , Regions had $584 million and $786 million , respectively, in total notional amounts related to these forward sale commitments. Changes in mark-to-market from both interest rate lock commitments and corresponding forward sale commitments related to residential mortgage loans are included in mortgage income. Changes in mark-to-market from both interest rate lock commitments and corresponding forward sale commitments related to commercial mortgage loans are included in capital markets fee income and other. Regions has elected to account for residential MSRs at fair value with any changes to fair value being recorded within mortgage income. Concurrent with the election to use the fair value measurement method, Regions began using various derivative instruments, in the form of forward rate commitments, futures contracts, swaps and swaptions to mitigate the effect of changes in the fair value of its residential MSRs in its consolidated statements of income. As of September 30, 2017 and December 31, 2016 , the total notional amount related to these contracts was $6.4 billion and $7.2 billion , respectively. The following table presents the location and amount of gain or (loss) recognized in income on derivatives not designated as hedging instruments in the consolidated statements of income for the three and nine months ended September 30, 2017 and 2016 : Three Months Ended September 30 Nine Months Ended September 30 Derivatives Not Designated as Hedging Instruments 2017 2016 2017 2016 (In millions) Capital markets fee income and other (1) : Interest rate swaps $ 3 $ 4 $ 9 $ 7 Interest rate options 9 2 19 16 Interest rate futures and forward commitments 1 1 6 4 Other contracts 9 (11 ) (6 ) (9 ) Total capital markets fee income and other 22 (4 ) 28 18 Mortgage income: Interest rate swaps 1 (3 ) 7 45 Interest rate options (2 ) (1 ) (3 ) 7 Interest rate futures and forward commitments 2 8 (5 ) 9 Total mortgage income 1 4 (1 ) 61 $ 23 $ — $ 27 $ 79 ______ (1) Capital markets fee income and other is included in Other income on the consolidated statements of income. Credit risk, defined as all positive exposures not collateralized with cash or other assets or reserved for, at September 30, 2017 and December 31, 2016 , totaled approximately $253 million and $334 million , respectively. These amounts represent the net credit risk on all trading and other derivative positions held by Regions. CREDIT DERIVATIVES Regions has both bought and sold credit protection in the form of participations on interest rate swaps (swap participations). These swap participations, which meet the definition of credit derivatives, were entered into in the ordinary course of business to serve the credit needs of customers. Swap participations, whereby Regions has purchased credit protection, entitle Regions to receive a payment from the counterparty if the customer fails to make payment on any amounts due to Regions upon early termination of the swap transaction and have maturities between 2017 and 2024. Swap participations, whereby Regions has sold credit protection have maturities between 2017 and 2025. For contracts where Regions sold credit protection, Regions would be required to make payment to the counterparty if the customer fails to make payment on any amounts due to the counterparty upon early termination of the swap transaction. Regions bases the current status of the prepayment/performance risk on bought and sold credit derivatives on recently issued internal risk ratings consistent with the risk management practices of unfunded commitments. Regions’ maximum potential amount of future payments under these contracts as of September 30, 2017 was approximately $296 million . This scenario would only occur if variable interest rates were at zero percent and all counterparties defaulted with zero recovery. The fair value of sold protection at September 30, 2017 and 2016 was immaterial. In transactions where Regions has sold credit protection, recourse to collateral associated with the original swap transaction is available to offset some or all of Regions’ obligation. Regions has bought credit protection in the form of credit default indices. These indices, which meet the definition of credit derivatives, were entered into in the ordinary course of business to economically hedge credit spread risk in commercial mortgage loans held for sale whereby the fair value option has been elected. Credit derivatives, whereby Regions has purchased credit protection, entitle Regions to receive a payment from the counterparty if losses on the underlying index exceed a certain threshold, dependent upon the tranche rating of the capital structure. CONTINGENT FEATURES Certain of Regions’ derivative instrument contracts with broker-dealers contain credit-related termination provisions and/or credit-related provisions regarding the posting of collateral, allowing those broker-dealers to terminate the contracts in the event that Regions’ and/or Regions Bank’s credit ratings falls below specified ratings from certain major credit rating agencies. The aggregate fair values of all derivative instruments with any credit-risk-related contingent features that were in a liability position on September 30, 2017 and December 31, 2016 , were $102 million and $141 million , respectively, for which Regions had posted collateral of $104 million and $141 million , respectively, in the normal course of business. OFFSETTING Regions engages in derivatives transactions with dealers and customers. These derivatives transactions are subject to enforceable master netting agreements, which include a right of setoff by the non-defaulting or non-affected party upon early termination of the derivatives transaction. The following table presents the Company's gross derivative positions, including collateral posted or received, as of September 30, 2017 and December 31, 2016 . Offsetting Derivative Assets Offsetting Derivative Liabilities September 30, 2017 December 31, 2016 September 30, 2017 December 31, 2016 (In millions) Gross amounts subject to offsetting $ 259 $ 414 $ 347 $ 583 Gross amounts not subject to offsetting 155 165 258 304 Gross amounts recognized 414 579 605 887 Gross amounts offset in the consolidated balance sheets (1) 158 241 265 541 Net amounts presented in the consolidated balance sheets 256 338 340 346 Gross amounts not offset in the consolidated balance sheets: Financial instruments 3 4 50 50 Cash collateral received/posted — — 250 227 Net amounts $ 253 $ 334 $ 40 $ 69 ________ (1) At September 30, 2017 , gross amounts of derivative assets and liabilities offset in the consolidated balance sheets presented above include cash collateral received of $40 million and cash collateral posted of $148 million . At December 31, 2016 , gross amounts of derivative assets and liabilities offset in the consolidated balance sheets presented above include cash collateral received of $48 million and cash collateral posted of $349 million . Gross amounts of derivatives not subject to offsetting primarily consist of derivatives cleared through a Central Counterparty Clearing House and interest rate lock commitments to originate mortgage loans.

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2017
Fair Value Disclosures [Abstract]
Fair Value Measurements	FAIR VALUE MEASUREMENTS See Note 1 “Summary of Significant Accounting Policies” to the consolidated financial statements of the Annual Report on Form 10-K for the year ended December 31, 2016 for a description of valuation methodologies for assets and liabilities measured at fair value on a recurring and non-recurring basis. Assets and liabilities measured at fair value rarely transfer between Level 1 and Level 2 measurements. There were no such transfers during the nine month periods ended September 30, 2017 and 2016 . Trading account securities and securities available for sale may be periodically transferred to or from Level 3 valuation based on management’s conclusion regarding the observability of inputs used in valuing the securities. Such transfers are accounted for as if they occur at the beginning of a reporting period. The following table presents assets and liabilities measured at estimated fair value on a recurring basis and non-recurring basis as of September 30, 2017 and December 31, 2016 : September 30, 2017 December 31, 2016 Level 1 Level 2 Level 3 Total Estimated Fair Value Level 1 Level 2 Level 3 Total Estimated Fair Value (In millions) Recurring fair value measurements Trading account securities $ 193 $ — $ — $ 193 $ 124 $ — $ — $ 124 Securities available for sale: U.S. Treasury securities $ 308 $ — $ — $ 308 $ 303 $ — $ — $ 303 Federal agency securities — 24 — 24 — 35 — 35 Obligations of states and political subdivisions — — — — — 1 — 1 Mortgage-backed securities (MBS): Residential agency — 17,484 — 17,484 — 17,371 — 17,371 Residential non-agency — — 3 3 — — 4 4 Commercial agency — 3,626 — 3,626 — 3,463 — 3,463 Commercial non-agency — 809 — 809 — 1,129 — 1,129 Corporate and other debt securities — 1,198 4 1,202 — 1,271 3 1,274 Equity securities 203 — — 203 201 — — 201 Total securities available for sale $ 511 $ 23,141 $ 7 $ 23,659 $ 504 $ 23,270 $ 7 $ 23,781 Loans held for sale $ — $ 307 $ — $ 307 $ — $ 414 $ 33 $ 447 Residential mortgage servicing rights $ — $ — $ 335 $ 335 $ — $ — $ 324 $ 324 Derivative assets: Interest rate swaps $ — $ 337 $ — $ 337 $ — $ 438 $ — $ 438 Interest rate options — 10 10 20 — 13 11 24 Interest rate futures and forward commitments — 4 — 4 — 11 — 11 Other contracts 2 51 — 53 2 104 — 106 Total derivative assets $ 2 $ 402 $ 10 $ 414 $ 2 $ 566 $ 11 $ 579 Derivative liabilities: Interest rate swaps $ — $ 542 $ — $ 542 $ — $ 776 $ — $ 776 Interest rate options — 10 — 10 — 12 — 12 Interest rate futures and forward commitments — 7 — 7 — 6 — 6 Other contracts 2 44 — 46 1 92 — 93 Total derivative liabilities $ 2 $ 603 $ — $ 605 $ 1 $ 886 $ — $ 887 Non-recurring fair value measurements Loans held for sale $ — $ — $ 5 $ 5 $ — $ — $ 7 $ 7 Foreclosed property and other real estate — 32 6 38 — 29 6 35 Assets and liabilities in all levels could result in volatile and material price fluctuations. Realized and unrealized gains and losses on Level 3 assets represent only a portion of the risk to market fluctuations in Regions’ consolidated balance sheets. Further, derivatives included in Levels 2 and 3 are used by the ALCO of the Company in a holistic approach to managing price fluctuation risks. The following tables illustrate rollforwards for all assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) for the three and nine months ended September 30, 2017 and 2016 . The tables do not reflect the change in fair value attributable to any related economic hedges the Company used to mitigate the interest rate risk associated with these assets and liabilities. The net changes in realized gains (losses) included in earnings related to Level 3 assets and liabilities held at September 30, 2017 and 2016 are not material. Three Months Ended September 30, 2017 Opening Total Realized / Unrealized Gains or Losses Purchases Sales Issuances Settlements Transfers Transfers Closing Included in Earnings Included in Other Compre- hensive Income (Loss) (In millions) Level 3 Instruments Only Securities available for sale: Residential non-agency MBS $ 3 — — — — — — — — $ 3 Corporate and other debt securities 4 — — — — — — — — 4 Total securities available for sale $ 7 — — — — — — — — $ 7 Commercial mortgage loans held for sale $ — — — — — — — — — $ — Residential mortgage servicing rights $ 346 (21 ) (1) — 10 — — — — — $ 335 Total derivatives, net $ 13 31 (2) — — — — (34 ) — — $ 10 Three Months Ended September 30, 2016 Opening Total Realized / Purchases Sales Issuances Settlements Transfers Transfers Closing Included Included (In millions) Level 3 Instruments Only Securities available for sale: Residential non-agency MBS $ 5 — — — — — — — — $ 5 Corporate and other debt securities 3 — — — — — — — — 3 Total securities available for sale $ 8 — — — — — — — — $ 8 Commercial mortgage loans held for sale $ 30 — — — — 60 — — — $ 90 Residential mortgage servicing rights $ 216 (12 ) (1) — 34 — — — — — $ 238 Total derivatives, net $ 17 32 (4) — — — — (33 ) — — $ 16 Nine Months Ended September 30, 2017 Opening Total Realized / Unrealized Gains or Losses Purchases Sales Issuances Settlements Transfers Transfers Closing Included in Earnings Included in Other Compre- hensive Income (Loss) (In millions) Level 3 Instruments Only Securities available for sale: Residential non-agency MBS $ 4 — — — — — (1 ) — — $ 3 Corporate and other debt securities 3 — — — — — — 1 — 4 Total securities available for sale $ 7 — — — — — (1 ) 1 — $ 7 Commercial mortgage loans held for sale $ 33 — — 7 (40 ) — — — — $ — Residential mortgage servicing rights $ 324 (45 ) (1) — 56 — — — — — $ 335 Total derivatives, net $ 11 87 (5) — — — — (88 ) — — $ 10 Nine Months Ended September 30, 2016 Opening Total Realized / Unrealized Gains or Losses Purchases Sales Issuances Settlements Transfers into Level 3 Transfers out of Level 3 Closing Included in Earnings Included in Other Compre- hensive Income (Loss) (In millions) Level 3 Instruments Only Trading account securities $ 33 (2 ) (3) — — (31 ) — — — — $ — Securities available for sale: Residential non-agency MBS $ 5 — — — — — — — — $ 5 Corporate and other debt securities 3 — — — — — — — — 3 Total securities available for sale $ 8 — — — — — — — — $ 8 Commercial mortgage loans held for sale $ — — — — — 90 — — — $ 90 Residential mortgage servicing rights $ 252 (87 ) (1) — 73 — — — — — $ 238 Total derivatives, net $ 10 105 (6) — — — — (99 ) — — $ 16 _________ (1) Included in mortgage income. (2) Approximately $8 million was included in capital markets fee income and other and $23 million was included in mortgage income. (3) Included in capitals markets fee income and other. (4) Approximately $3 million was included in capital markets fee income and other and $29 million was included in mortgage income. (5) Approximately $18 million was included in capital markets fee income and other and $69 million was included in mortgage income. (6) Approximately $16 million was included in capital markets fee income and other and $89 million was included in mortgage income. The following table presents the fair value adjustments related to non-recurring fair value measurements: Three Months Ended September 30 Nine Months Ended September 30 2017 2016 2017 2016 (In millions) Loans held for sale $ (1 ) $ (3 ) $ (8 ) $ (25 ) Foreclosed property and other real estate (6 ) (8 ) (21 ) (35 ) The following tables present detailed information regarding assets and liabilities measured at fair value using significant unobservable inputs (Level 3) as of September 30, 2017 , and December 31, 2016 . The tables include the valuation techniques and the significant unobservable inputs utilized. The range of each significant unobservable input as well as the weighted-average within the range utilized at September 30, 2017 , and December 31, 2016 , are included. Following the tables are descriptions of the valuation techniques and the sensitivity of the techniques to changes in the significant unobservable inputs. September 30, 2017 Level 3 Valuation Technique Unobservable Input(s) Quantitative Range of Unobservable Inputs and (Weighted-Average) (Dollars in millions) Recurring fair value measurements: Securities available for sale: Residential non-agency MBS $3 Discounted cash flow Spread to LIBOR 5.4% - 69.9% (22.9%) Weighted-average CPR (%) 3.8% - 29.3% (11.4%) Probability of default 1.3% Loss severity 88.0% Corporate and other debt securities $4 Market comparable Evaluated quote on same issuer/comparable bond 99.7% Residential mortgage servicing rights (1) $335 Discounted cash flow Weighted-average CPR (%) 8.1% - 26.5% (10.0%) OAS (%) 8.1% - 15.0% (8.6%) Derivative assets: Interest rate options $8 Interest rate lock commitments on the residential mortgage loans are valued using discounted cash flows Weighted-average CPR (%) 8.1% - 26.5% (10.0%) OAS (%) 8.1% - 15.0% (8.6%) Pull-through 8.6% - 99.0% (79.9%) $2 Interest rate lock commitments on the commercial mortgage loans are valued using discounted cash flows Internal rate of return 12.0% - 17.0% (12.0%) Nonrecurring fair value measurements: Loans held for sale $5 Commercial loans held for sale are valued based on multiple data points, including discount to appraised value of collateral based on recent market activity for sales of similar loans Appraisal comparability adjustment (discount) 28.3% - 72.7% (54.7%) Foreclosed property and other real estate $5 Property in foreclosure is valued by discount to appraised value of property based on recent market activity for sales of similar properties Appraisal comparability adjustment (discount) 25.0% - 35.0% (26.0%) $1 Bank owned property valuations are based on comparable sales and local broker network estimates provided by a third-party real estate services provider Estimated third-party valuations utilizing available sales data for similar transactions (discount) 3.4% _________ (1) See Note 5 for additional disclosures related to assumptions used in the fair value calculation for residential mortgage servicing rights. December 31, 2016 Level 3 Valuation Technique Unobservable Input(s) Quantitative Range of Unobservable Inputs and (Weighted-Average) (Dollars in millions) Recurring fair value measurements: Securities available for sale: Residential non-agency MBS $4 Discounted cash flow Spread to LIBOR 5.5% - 70.0% (23.0%) Weighted-average CPR (%) 3.5% - 29.5% (12.2%) Probability of default 3.1% Loss severity 63.6% Corporate and other debt securities $3 Market comparable Evaluated quote on same issuer/comparable bond 100.3% Commercial mortgage loans held for sale $33 Market comparable Credit spreads for bonds in the commercial MBS 0.4% - 5.8% (1.3%) Residential mortgage servicing rights (1) $324 Discounted cash flow Weighted-average CPR (%) 5.7% - 24.3% (7.6%) OAS (%) 8.2% - 13.6% (10.5%) Derivative assets: Interest rate options $8 Interest rate lock commitments on the residential mortgage loans are valued using discounted cash flows Weighted-average CPR (%) 5.7% - 24.3% (7.6%) OAS (%) 8.2% - 13.6% (10.5%) Pull-through 14.9% - 99.4% (78.3%) $3 Interest rate lock commitments on the commercial mortgage loans are valued using discounted cash flows Internal rate of return 7.0% - 17.0% (12.0%) Nonrecurring fair value measurements: Loans held for sale $7 Commercial loans held for sale are valued based on multiple data points, including discount to appraised value of collateral based on recent market activity for sales of similar loans Appraisal comparability adjustment (discount) 26.2% - 69.4% (48.1%) Foreclosed property and other real estate $1 Property in foreclosure is valued by discount to appraised value of property based on recent market activity for sales of similar properties Appraisal comparability adjustment (discount) 25.0% - 60.3% (37.0%) $5 Bank owned property valuations are based on comparable sales and local broker network estimates provided by a third-party real estate services provider Estimated third-party valuations utilizing available sales data for similar transactions (discount) 5.9% - 29.6% (15.8%) _________ (1) See Note 7 to the consolidated financial statements of the Annual Report on Form 10-K for the year ended December 31, 2016 for additional disclosures related to assumptions used in the fair value calculation for residential mortgage servicing rights. RECURRING FAIR VALUE MEASUREMENTS USING SIGNIFICANT UNOBSERVABLE INPUTS Securities available for sale Residential non-agency MBS —The fair value reported in this category relates to retained interests in legacy securitizations. Significant unobservable inputs include the spread to LIBOR, CPR, probability of default, and loss severity in the event of default. Significant increases in spread to LIBOR, probability of default and loss given default in isolation would result in significantly lower fair value. Corporate and other debt securities —Significant unobservable inputs include evaluated quotes on comparable bonds for the same issuer. Changes in the evaluated quote on comparable bonds would result in a directionally similar change in the fair value of the corporate and other debt securities. Commercial mortgage loans held for sale Commercial mortgage loans held for sale are valued based on traded market prices for comparable commercial mortgage-backed securitizations, into which the loans will be placed, adjusted for movements of interest rates and credit spreads. Significant unobservable inputs include credit spreads for bonds in commercial mortgage-backed securitizations. An increase in credit spreads would result in a decrease in fair value. Residential mortgage servicing rights The significant unobservable inputs used in the fair value measurement of residential MSRs are OAS and CPR. This valuation requires generating cash flow projections over multiple interest rate scenarios and discounting those cash flows at a risk-adjusted rate. Additionally, the impact of prepayments and changes in the OAS are based on a variety of underlying inputs such as servicing costs. Increases or decreases to the underlying cash flow inputs will have a corresponding impact on the value of the MSR asset. The net change in unrealized gains (losses) included in earnings related to MSRs held at period end are disclosed as the changes in valuation inputs or assumptions included in the MSR rollforward table in Note 5. See Note 5 for these amounts and additional disclosures related to assumptions used in the fair value calculation for MSRs. Derivative assets Residential mortgage interest rate options —These instruments are interest rate lock agreements made in the normal course of originating residential mortgage loans. Significant unobservable inputs in the fair value measurement are OAS, CPR, and pull-through. The impact of OAS and CPR inputs in the valuation of these derivative instruments are consistent with the MSR discussion above. Pull-through is an estimate of the number of interest rate lock commitments that will ultimately become funded loans. Increases or decreases in the pull-through assumption will have a corresponding impact on the value of these derivative assets. Commercial mortgage interest rate options —These instruments are interest rate lock agreements made in the normal course of originating commercial mortgage loans. The significant unobservable input in the fair value measurement using discounted cash flows is the internal rate of return. The Company's internal rates of return are compared against those of market competitors, and should those rates change the Company's rates would also change in a similar direction and the fair value of the option would change inversely. NON-RECURRING FAIR VALUE MEASUREMENTS USING SIGNIFICANT UNOBSERVABLE INPUTS Loans held for sale Commercial loans held for sale are valued based on multiple data points indicating the fair value for each loan. The primary data point for loans held for sale is a discount to the appraised value of the underlying collateral, which considers the return required by potential buyers of the loans. Management establishes this discount or comparability adjustment based on recent sales of loans secured by similar property types. As liquidity in the market increases or decreases, the comparability adjustment and the resulting asset valuation are impacted. These non-recurring fair value measurements are typically recorded on the date an updated appraisal is received. Foreclosed property and other real estate Property in foreclosure is valued based on offered quotes as available. If no sales contract is pending for a specific property, management establishes a comparability adjustment to the appraised value based on historical activity considering proceeds for properties sold versus the corresponding appraised value. Increases or decreases in realization for properties sold impact the comparability adjustment for similar assets remaining on the balance sheet. These non-recurring fair value measurements are typically recorded on the date an updated offered quote or appraisal is received. Bank owned property available for sale is valued based on estimated third-party valuations utilizing recent sales data from similar transactions. A broker's opinion of value is obtained to further support the asset valuations. Updated valuations along with actual sales results of similar properties can further impact these values. These non-recurring fair value measurements are typically recorded on the date an updated third-party valuation is received. FAIR VALUE OPTION Regions has elected the fair value option for all FNMA and FHLMC eligible residential mortgage loans and certain commercial mortgage loans originated with the intent to sell. These elections allow for a more effective offset of the changes in fair values of the loans and the derivative instruments used to economically hedge them without the burden of complying with the requirements for hedge accounting. Regions has not elected the fair value option for other loans held for sale primarily because they are not economically hedged using derivative instruments. Fair values of residential mortgage loans held for sale are based on traded market prices of similar assets where available and/or discounted cash flows at market interest rates, adjusted for securitization activities that include servicing values and market conditions, and are recorded in loans held for sale in the consolidated balance sheets. Fair values of commercial mortgage loans held for sale are based on traded market prices for comparable commercial mortgage-backed securitizations, into which the loans will be placed, adjusted for movements of interest rates and credit spreads. The following table summarizes the difference between the aggregate fair value and the aggregate unpaid principal balance for mortgage loans held for sale measured at fair value: September 30, 2017 December 31, 2016 Aggregate Fair Value Aggregate Unpaid Principal Aggregate Fair Value Less Aggregate Unpaid Principal Aggregate Fair Value Aggregate Unpaid Principal Aggregate Fair Value Less Aggregate Unpaid Principal (In millions) Mortgage loans held for sale, at fair value $ 307 $ 296 $ 11 $ 447 $ 443 $ 4 Interest income on mortgage loans held for sale is recognized based on contractual rates and is reflected in interest income on loans held for sale in the consolidated statements of income. The following table details net gains and losses resulting from changes in fair value of these loans, which were recorded in mortgage and capital markets income in the consolidated statements of income during the three and nine months ended September 30, 2017 and 2016 . These changes in fair value are mostly offset by economic hedging activities. An immaterial portion of these amounts was attributable to changes in instrument-specific credit risk. Net gains (losses) resulting from changes in fair value Three Months Ended September 30 Nine Months Ended September 30 2017 2016 2017 2016 (In millions) Mortgage loans held for sale, at fair value $ (3 ) $ — $ 5 $ 9 The carrying amounts and estimated fair values, as well as the level within the fair value hierarchy, of the Company’s financial instruments as of September 30, 2017 are as follows: September 30, 2017 Carrying Amount Estimated Fair Value (1) Level 1 Level 2 Level 3 (In millions) Financial assets: Cash and cash equivalents $ 3,761 $ 3,761 $ 3,761 $ — $ — Trading account securities 193 193 193 — — Securities held to maturity 1,703 1,720 — 1,720 — Securities available for sale 23,659 23,659 511 23,141 7 Loans held for sale 388 388 — 388 — Loans (excluding leases), net of unearned income and allowance for loan losses (2)(3) 77,351 74,002 — — 74,002 Other earning assets (4) 891 891 — 891 — Derivative assets 414 414 2 402 10 Financial liabilities: Derivative liabilities 605 605 2 603 — Deposits 97,591 97,630 — 97,630 — Short-term borrowings 600 600 — 600 — Long-term borrowings 6,102 6,447 — 4,878 1,569 Loan commitments and letters of credit 85 420 — — 420 Indemnification obligation 23 22 — — 22 _________ (1) Estimated fair values are consistent with an exit price concept. The assumptions used to estimate the fair values are intended to approximate those that a market participant would use in a hypothetical orderly transaction. In estimating fair value, the Company maintains a corporate governance program to make adjustments for estimated changes in interest rates, market liquidity and credit spreads in the periods they are deemed to have occurred. Historically, the Company has utilized the results of a third-party vendor model to support its primary valuation approach for loans. The Company is currently finalizing the development of an internally-supported loan valuation model which management expects to implement by March 31, 2018. (2) The estimated fair value of portfolio loans assumes sale of the loans to a third-party financial investor. Accordingly, the value to the Company if the loans were held to maturity is not reflected in the fair value estimate. In the current whole loan market, financial investors are generally requiring a higher rate of return than the return inherent in loans if held to maturity. The fair value discount at September 30, 2017 was $3.3 billion or 4.3 percent. (3) Excluded from this table is the capital lease carrying amount of $964 million at September 30, 2017 . (4) Excluded from this table is the operating lease carrying amount of $ 530 million at September 30, 2017 . The carrying amounts and estimated fair values, as well as the level within the fair value hierarchy, of the Company's financial instruments as of December 31, 2016 are as follows: December 31, 2016 Carrying Amount Estimated Fair Value (1) Level 1 Level 2 Level 3 (In millions) Financial assets: Cash and cash equivalents $ 5,451 $ 5,451 $ 5,451 $ — $ — Trading account securities 124 124 124 — — Securities held to maturity 1,362 1,369 — 1,369 — Securities available for sale 23,781 23,781 504 23,270 7 Loans held for sale 718 722 — 689 33 Loans (excluding leases), net of unearned income and allowance for loan losses (2)(3) 78,128 74,063 — — 74,063 Other earning assets (4) 956 956 — 956 — Derivative assets 579 579 2 566 11 Financial liabilities: Derivative liabilities 887 887 1 886 — Deposits 99,035 99,081 — 99,081 — Long-term borrowings 7,763 8,008 — 5,408 2,600 Loan commitments and letters of credit 102 484 — — 484 Indemnification obligation 28 26 — — 26 _________ (1) Estimated fair values are consistent with an exit price concept. The assumptions used to estimate the fair values are intended to approximate those that a market participant would use in a hypothetical orderly transaction. In estimating fair value, the Company maintains a corporate governance program to make adjustments for estimated changes in interest rates, market liquidity and credit spreads in the periods they are deemed to have occurred. Historically, the Company has utilized the results of a third-party vendor model to support its primary valuation approach for loans. The Company is currently finalizing the development of an internally-supported loan valuation model which management expects to implement by March 31, 2018. (2) The estimated fair value of portfolio loans assumes sale of the loans to a third-party financial investor. Accordingly, the value to the Company if the loans were held to maturity is not reflected in the fair value estimate. In the current whole loan market, financial investors are generally requiring a higher rate of return than the return inherent in loans if held to maturity. The fair value discount at December 31, 2016 was $4.1 billion or 5.2 percent. (3) Excluded from this table is the capital lease carrying amount of $876 million at December 31, 2016 . (4) Excluded from this table is the operating lease carrying amount of $688 million at December 31, 2016 .

Business Segment Information

Business Segment Information	9 Months Ended
	Sep. 30, 2017
Segment Reporting [Abstract]
Business Segment Information	BUSINESS SEGMENT INFORMATION Each of Regions’ reportable segments is a strategic business unit that serves specific needs of Regions’ customers based on the products and services provided. The segments are based on the manner in which management views the financial performance of the business. The Company has three reportable segments: Corporate Bank, Consumer Bank, and Wealth Management, with the remainder split between Discontinued Operations and Other. Additional information about the Company's reportable segments is included in Regions' Annual Report on Form 10-K for the year ended December 31, 2016. The application and development of management reporting methodologies is a dynamic process and is subject to periodic enhancements. As these enhancements are made, financial results presented by each reportable segment may be periodically revised. The following tables present financial information for each reportable segment for the period indicated. Three Months Ended September 30, 2017 Corporate Bank Consumer Bank Wealth Management Other Continuing Operations Discontinued Operations Consolidated (In millions) Net interest income and other financing income (loss) $ 362 $ 542 $ 50 $ (56 ) $ 898 $ — $ 898 Provision (credit) for loan losses 66 75 5 (70 ) 76 — 76 Non-interest income 112 275 110 18 515 — 515 Non-interest expense 214 511 117 44 886 1 887 Income (loss) before income taxes 194 231 38 (12 ) 451 (1 ) 450 Income tax expense (benefit) 74 88 15 (38 ) 139 — 139 Net income (loss) $ 120 $ 143 $ 23 $ 26 $ 312 $ (1 ) $ 311 Average assets $ 51,304 $ 34,988 $ 3,093 $ 34,048 $ 123,433 $ — $ 123,433 Three Months Ended September 30, 2016 Corporate Bank Consumer Bank Wealth Management Other Continuing Operations Discontinued Operations Consolidated (In millions) Net interest income and other financing income (loss) $ 352 $ 516 $ 43 $ (76 ) $ 835 $ — $ 835 Provision (credit) for loan losses 72 74 5 (122 ) 29 — 29 Non-interest income 130 291 107 71 599 — 599 Non-interest expense 225 530 120 59 934 (2 ) 932 Income (loss) before income taxes 185 203 25 58 471 2 473 Income tax expense (benefit) 70 77 10 (5 ) 152 1 153 Net income (loss) $ 115 $ 126 $ 15 $ 63 $ 319 $ 1 $ 320 Average assets $ 53,798 $ 34,843 $ 3,233 $ 33,955 $ 125,829 $ — $ 125,829 Nine Months Ended September 30, 2017 Corporate Bank Consumer Bank Wealth Management Other Continuing Operations Discontinued Operations Consolidated (In millions) Net interest income and other financing income (loss) $ 1,062 $ 1,593 $ 143 $ (159 ) $ 2,639 $ — $ 2,639 Provision (credit) for loan losses 199 220 16 (241 ) 194 — 194 Non-interest income 343 836 331 40 1,550 — 1,550 Non-interest expense 649 1,541 358 124 2,672 (9 ) 2,663 Income (loss) before income taxes 557 668 100 (2 ) 1,323 9 1,332 Income tax expense (benefit) 212 254 38 (104 ) 400 4 404 Net income (loss) $ 345 $ 414 $ 62 $ 102 $ 923 $ 5 $ 928 Average assets $ 51,896 $ 34,982 $ 3,130 $ 34,016 $ 124,024 $ — $ 124,024 Nine Months Ended September 30, 2016 Corporate Bank Consumer Bank Wealth Management Other Continuing Operations Discontinued Operations Consolidated (In millions) Net interest income and other financing income (loss) $ 1,088 $ 1,531 $ 131 $ (205 ) $ 2,545 $ — $ 2,545 Provision (credit) for loan losses 216 215 17 (234 ) 214 — 214 Non-interest income 380 831 321 99 1,631 — 1,631 Non-interest expense 662 1,544 351 161 2,718 (7 ) 2,711 Income (loss) before income taxes 590 603 84 (33 ) 1,244 7 1,251 Income tax expense (benefit) 224 229 32 (105 ) 380 3 383 Net income (loss) $ 366 $ 374 $ 52 $ 72 $ 864 $ 4 $ 868 Average assets $ 54,420 $ 34,373 $ 3,235 $ 33,706 $ 125,734 $ — $ 125,734

Commitments, Contingencies and

Commitments, Contingencies and Guarantees	9 Months Ended
	Sep. 30, 2017
Commitments and Contingencies Disclosure [Abstract]
Commitments, Contingencies and Guarantees	COMMITMENTS, CONTINGENCIES AND GUARANTEES COMMERCIAL COMMITMENTS Regions issues off-balance sheet financial instruments in connection with lending activities. The credit risk associated with these instruments is essentially the same as that involved in extending loans to customers and is subject to Regions’ normal credit approval policies and procedures. Regions measures inherent risk associated with these instruments by recording a reserve for unfunded commitments based on an assessment of the likelihood that the guarantee will be funded and the creditworthiness of the customer or counterparty. Collateral is obtained based on management’s assessment of the creditworthiness of the customer. Credit risk associated with these instruments is represented by the contractual amounts indicated in the following table: September 30, 2017 December 31, 2016 (In millions) Unused commitments to extend credit $ 45,378 $ 44,408 Standby letters of credit 1,356 1,425 Commercial letters of credit 63 46 Liabilities associated with standby letters of credit 25 34 Assets associated with standby letters of credit 26 34 Reserve for unfunded credit commitments 59 69 Unused commitments to extend credit —To accommodate the financial needs of its customers, Regions makes commitments under various terms to lend funds to consumers, businesses and other entities. These commitments include (among others) credit card and other revolving credit agreements, term loan commitments and short-term borrowing agreements. Many of these loan commitments have fixed expiration dates or other termination clauses and may require payment of a fee. Since many of these commitments are expected to expire without being funded, the total commitment amounts do not necessarily represent future liquidity requirements. Standby letters of credit —Standby letters of credit are also issued to customers, which commit Regions to make payments on behalf of customers if certain specified future events occur. Regions has recourse against the customer for any amount required to be paid to a third party under a standby letter of credit. Historically, a large percentage of standby letters of credit expire without being funded. The contractual amount of standby letters of credit represents the maximum potential amount of future payments Regions could be required to make and represents Regions’ maximum credit risk. Commercial letters of credit —Commercial letters of credit are issued to facilitate foreign or domestic trade transactions for customers. As a general rule, drafts will be drawn when the goods underlying the transaction are in transit. LEGAL CONTINGENCIES Regions and its subsidiaries are subject to loss contingencies related to litigation, claims, investigations and legal and administrative cases and proceedings arising in the ordinary course of business. Regions evaluates these contingencies based on information currently available, including advice of counsel. Regions establishes accruals for those matters when a loss contingency is considered probable and the related amount is reasonably estimable. Any accruals are periodically reviewed and may be adjusted as circumstances change. Some of Regions' exposure with respect to loss contingencies may be offset by applicable insurance coverage. In determining the amounts of any accruals or estimates of possible loss contingencies however, Regions does not take into account the availability of insurance coverage. To the extent that Regions has an insurance recovery, the proceeds are recorded in the period the recovery is received. In addition, as previously discussed, Regions has agreed to indemnify Raymond James for all legal matters resulting from pre-closing activities in conjunction with the sale of Morgan Keegan and recorded an indemnification obligation at fair value in the second quarter of 2012. The indemnification obligation had a carrying amount of approximately $23 million and an estimated fair value of approximately $22 million as of September 30, 2017 (see Note 12). When it is practicable, Regions estimates possible loss contingencies, whether or not there is an accrued probable loss. When Regions is able to estimate such possible losses, and when it is reasonably possible Regions could incur losses in excess of amounts accrued, Regions discloses the aggregate estimation of such possible losses. Regions currently estimates that any such losses in excess of amounts accrued, including legal contingencies that are subject to the indemnification agreement with Raymond James, would be immaterial to Regions' financial statements as a whole. However, as available information changes, the matters for which Regions is able to estimate, as well as the estimates themselves will be adjusted accordingly. Assessments of litigation and claims exposure are difficult because they involve inherently unpredictable factors including, but not limited to, the following: whether the proceeding is in the early stages; whether damages are unspecified, unsupported, or uncertain; whether there is a potential for punitive or other pecuniary damages; whether the matter involves legal uncertainties, including novel issues of law; whether the matter involves multiple parties and/or jurisdictions; whether discovery has begun or is not complete; whether meaningful settlement discussions have commenced; and whether the lawsuit involves class allegations. Assessments of class action litigation, which is generally more complex than other types of litigation, are particularly difficult, especially in the early stages of the proceeding when it is not known whether a class will be certified or how a potential class, if certified, will be defined. As a result, Regions may be unable to estimate reasonably possible losses with respect to some of the matters disclosed below, and the aggregated estimated amount discussed above may not include an estimate for every matter disclosed below. In July 2006, Morgan Keegan and a former Morgan Keegan analyst were named as defendants in a lawsuit filed by a Canadian insurance and financial services company and its American subsidiary in the Circuit Court of Morris County, New Jersey. Plaintiffs alleged civil claims under the RICO Act and claims for commercial disparagement, tortious interference with contractual relationships, tortious interference with prospective economic advantage and common law conspiracy. Plaintiffs allege that defendants engaged in a multi-year conspiracy to publish and disseminate false and defamatory information about plaintiffs to improperly drive down plaintiffs’ stock price, so that others could profit from short positions. Plaintiffs allege that defendants’ actions damaged their reputations and harmed their business relationships. Plaintiffs seek monetary damages for a number of categories of alleged damages, including lost insurance business, lost financings and increased financing costs, increased audit fees and directors and officers insurance premiums and lost acquisitions. In September 2012, the trial court dismissed the case with prejudice. Plaintiffs filed an appeal, and in April 2017, the appellate court affirmed the dismissal of the plaintiffs’ claims under the RICO Act. The appellate court reversed the trial court’s dismissal of the commercial disparagement and tortious interference claims and remanded those claims but limited the plaintiffs’ damages. Plaintiffs filed an appeal with the Supreme Court of New Jersey in May 2017, and in October 2017, that court denied the plaintiffs' petition. This matter is subject to the indemnification agreement with Raymond James. Regions is involved in formal and informal information-gathering requests, investigations, reviews, examinations and proceedings by various governmental regulatory agencies, law enforcement authorities and self-regulatory bodies regarding Regions’ business, Regions' business practices and policies, and the conduct of persons with whom Regions does business. Additional inquiries will arise from time to time. In connection with those inquiries, Regions receives document requests, subpoenas and other requests for information. The inquiries, including those described below, could develop into administrative, civil or criminal proceedings or enforcement actions that could result in consequences that have a material effect on Regions' consolidated financial position, results of operations or cash flows as a whole. Such consequences could include adverse judgments, findings, settlements, penalties, fines, orders, injunctions, restitution, or alterations in our business practices, and could result in additional expenses and collateral costs, including reputational damage. Regions is cooperating with an investigation by the United States Attorney’s Office for the Eastern District of New York pertaining to Regions' banking relationship with a former customer and accounts maintained by related entities and individuals affiliated with the customer who may be involved in criminal activity, as well as related aspects of Regions' Anti-Money Laundering and Bank Secrecy Act compliance program. While the final outcome of litigation and claims exposures or of any inquiries is inherently unpredictable, management is currently of the opinion that the outcome of pending and threatened litigation and inquiries will not have a material effect on Regions’ business, consolidated financial position, results of operations or cash flows as a whole. However, in the event of unexpected future developments, it is reasonably possible that an adverse outcome in any of the matters discussed above could be material to Regions’ business, consolidated financial position, results of operations or cash flows for any particular reporting period of occurrence. GUARANTEES INDEMNIFICATION OBLIGATION As discussed in Note 2, on April 2, 2012 (“Closing Date”), Regions closed the sale of Morgan Keegan and related affiliates to Raymond James. In connection with the sale, Regions agreed to indemnify Raymond James for all legal matters related to pre-closing activities, including matters filed subsequent to the Closing Date that relate to actions that occurred prior to closing. Losses under the indemnification include legal and other expenses, such as costs for judgments, settlements and awards associated with the defense and resolution of the indemnified matters. The maximum potential amount of future payments that Regions could be required to make under the indemnification is indeterminable due to the indefinite term of some of the obligations. As of September 30, 2017 , the carrying value of the indemnification obligation was approximately $23 million . FANNIE MAE DUS LOSS SHARE GUARANTEE Regions is a Fannie Mae DUS lender. The Fannie Mae DUS program provides liquidity to the multi-family housing market. Regions services loans sold to Fannie Mae and is required to provide a loss share guarantee equal to one-third of the majority of its DUS servicing portfolio. At September 30, 2017 and December 31, 2016 , the Company's DUS servicing portfolio totaled approximately $2.6 billion and $1.8 billion , respectively. Regions' maximum quantifiable contingent liability related to its loss share guarantee was approximately $834 million and $559 million at September 30, 2017 and December 31, 2016 , respectively. The Company would be liable for this amount only if all of the loans it services for Fannie Mae, for which the Company retains some risk of loss, were to default and all of the collateral underlying these loans was determined to be without value at the time of settlement. Therefore, the maximum quantifiable contingent liability is not representative of the actual loss the Company would be expected to incur. The estimated fair value of the associated loss share guarantee recorded as a liability on the Company's consolidated balance sheets was approximately $4 million at both September 30, 2017 and December 31, 2016 . Refer to Note 1 "Summary of Significant Accounting Policies" to the consolidated financial statements in the Annual Report on Form 10-K for the year ended December 31, 2016, for additional information.

Recent Accounting Pronouncement

Recent Accounting Pronouncements	9 Months Ended
	Sep. 30, 2017
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Recent Accounting Pronouncements	RECENT ACCOUNTING PRONOUNCEMENTS Standard Description Required Date of Adoption Effect on Regions' financial statements or other significant matters Standards Adopted (or partially adopted) in 2017 ASU 2016-05, Effect of Derivative Contract Novations on Existing Hedge Accounting Relationships The ASU amends Topic 815, Derivatives and Hedging , and addresses how a change in the counterparty to a derivative contract affects a hedging relationship. The ASU may be adopted either prospectively or on a modified retrospective basis. January 1, 2017 Adopted on a prospective basis January 1, 2017. ASU 2016-06, Contingent Put and Call Options in Debt Instruments The ASU amends Topic 815, Derivatives and Hedging , and clarifies that entities should solely use the four-step decision sequence described in current derivatives accounting guidance. This sequence should be used when assessing whether contingent exercise provisions associated with a put or call option are clearly and closely related to their debt hosts. The ASU should be adopted on a modified retrospective basis. January 1, 2017 Adopted January 1, 2017. ASU 2016-07, Simplifying the Transition to the Equity Method of Accounting The ASU amends Topic 323, Investments-Equity Method and Joint Ventures , and eliminates the requirement for an investor to retrospectively apply the equity method to investments when its ownership interest (or degree of influence in an investee) increases to a level that triggers the equity method of accounting. This ASU should be adopted prospectively. January 1, 2017 Adopted on a prospective basis January 1, 2017. ASU 2016-09, Improvements to Employee Share-Based Payment Accounting This ASU amends Topic 718, Stock Compensation , and intends to improve and simplify accounting for employee share-based payments. The amendments update the accounting for income taxes, forfeitures, and statutory tax withholding requirements, as well as classification in the statement of cash flows. The transition method of accounting application (i.e. prospective, retrospective or modified retrospective application) differs by amendment and is defined in the guidance. January 1, 2017 Adopted on January 1, 2017. Additionally, the Company has no previously unrecognized excess tax benefits; therefore, there was no impact. The Company elected to retain its existing accounting policy election to estimate award forfeitures. ASU 2016-17, Interest Held through Related Parties That Are Under Common Control This ASU amends Topic 810, Consolidation , and prescribes that when determining whether a single decision maker is the primary beneficiary of a variable interest entity (VIE), a single decision maker will no longer be required to consider indirect interests held through related parties that are under common control with the single decision maker to be the equivalent of direct interests in their entirety. January 1, 2017 Adopted on January 1, 2017. No material impact. Standard Description Required Date of Adoption Effect on Regions' financial statements or other significant matters Standards Not Yet Adopted ASU 2014-09, Revenue from Contracts with Customers This ASU supersedes the revenue recognition requirements in ASC Topic 605, Revenue Recognition , and most industry-specific guidance throughout the Industry topics of the Codification. The core principle of the ASU is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The ASU may be adopted either retrospectively or on a modified retrospective basis. January 1, 2018 Regions has established a revenue recognition standard implementation team, led by the Corporate Controller’s group with assistance from the various lines of business and finance management to evaluate the potential impact of adopting this guidance. The implementation team has completed the scoping and determined that approximately $1.7 billion of 2016 non-interest income would be within the scope of the new revenue recognition standard, when adopted. Non-interest income streams that are out of scope of the new standard include mortgage income, securities gains (losses), bank-owned life insurance and certain other components within non-interest income. The implementation team has also completed its reviews of contracts related to in-scope non-interest income. Based on the completed contract reviews, any potential changes in revenue recognition for those contracts are not expected to result in a material impact to Regions upon adoption. The implementation team is in the process of developing additional quantitative and qualitative disclosures that will be required upon the adoption of the new revenue recognition standard. ASU 2017-01, Clarifying the Definition of a Business This ASU amends Topic 805, Business Combinations , and provides additional accounting guidance to better determine when a set of assets and activities is a business. The ASU should be adopted prospectively. January 1, 2018 Early adoption is permitted for certain transactions as described in the guidance. Regions is evaluating the impact upon adoption; however, the impact is not expected to be material. ASU 2017-04, Simplifying the Test for Goodwill Impairment This ASU amends Topic 350, Intangibles-Goodwill and Other , and eliminates Step 2 from the goodwill impairment test. January 1, 2020 Regions believes the adoption of this guidance will not have a material impact. Regions does not plan to early adopt. 2017-05, Other Income- Gains and Losses from the Derecognition of Nonfinancial Assets This ASU amends Subtopic 610-20, Other Income - Gains and Losses from the Derecognition of Nonfinancial Assets , to clarify the scope and to add guidance for partial sales of nonfinancial assets. The new standard adds a definition for in-substance nonfinancial assets and clarifies that nonfinancial assets within a legal entity are within the scope of ASC 606. This ASU should be adopted in conjunction with ASU 2014-09 using a retrospective or modified retrospective approach. January 1, 2018 Regions is evaluating the impact upon adoption; however, the impact is not expected to be material. 2017-07, Compensation- Retirement Benefits This ASU amends Topic 715, Retirement Benefits , and provides more prescriptive guidance around the presentation of net period pension and postretirement benefit cost in the income statement. The amendment requires that the service cost component be disaggregated from other components of net periodic benefit cost in the income statement. January 1, 2018 Early adoption is permitted. Regions is evaluating the impact upon adoption; however, the impact is not expected to be material. Regions does not plan to early adopt. 2017-08, Receivables- Nonrefundable Fees and Other Costs This ASU amends Subtopic 310-20, Receivables-Nonrefundable Fees and Other Costs , to shorten the amortization period for certain purchased callable debt securities held at a premium to the earliest call date. Current guidance generally requires entities to amortize a premium as a yield adjustment over the contractual life of the instrument. Shortening the amortization period is generally expected to more closely align the recognition of interest income with expectations incorporated into the pricing of the underlying securities. The amendments do not affect the accounting treatment of discounts. This ASU should be adopted on a modified retrospective basis. January 1, 2019 Regions is evaluating the impact upon adoption; however, the impact is not expected to be material. ASU 2016-15, Classification of Certain Cash Receipts and Cash Payments This ASU amends Topic 230, Statement of Cash Flows , and provides clarification with respect to classification within the statement on cash flows where current guidance is unclear or silent. The ASU should be adopted retrospectively. January 1, 2018 Early adoption is permitted. Regions is evaluating the impact upon adoption; however, the impact is not expected to be material. Regions does not plan to early adopt. Standard Description Required Date of Adoption Effect on Regions' financial statements or other significant matters Standards Not Yet Adopted (continued) ASU 2016-02, Leases This ASU creates ASU Topic 842, Leases , and supersedes Topic 840, Leases . The new guidance requires lessees to record a right-of-use asset and a corresponding liability equal to the present value of future rental payments on their balance sheets for all leases with a term greater than one year. There are not significant changes to lessor accounting; however, there were certain improvements made to align lessor accounting with the lessee accounting model and Topic 606, Revenue from Contracts with Customers . This guidance expands both quantitative and qualitative required disclosures. This ASU should be adopted on a modified retrospective basis. January 1, 2019 Early adoption is permitted. This ASU supersedes the lease accounting requirements in Topic 840, Leases . Regions has established a leasing standard implementation team comprised of the Corporate Controller’s group, Corporate Real Estate and other business and finance management to plan and execute the adoption of the new leasing standard. The implementation team has substantially completed the identification of Regions’ leases that will need to be measured and reported as a right-of-use asset and corresponding liability for future rental payments. The implementation team is currently working with a lease administration vendor to set up and test the accounting for the lease contracts on the lease administration system. Based on the December 31, 2016 lease portfolio, Regions has approximately $761 million of future lease obligations that would be measured and recognized when the new guidance is adopted (refer to Note 24 to the 2016 consolidated financial statements included in the Annual Report on Form 10-K for the year ended December 31, 2016). While this amount represents a large majority of the leases that are within the scope of the new leasing standard, the implementation team will continue reviewing service contracts up through the effective date and may identify additional leases embedded in those arrangements that will be within the scope of the new standard. Between now and January 1, 2019, Regions will likely have changes to the lease portfolio as the Company continues to evaluate and execute branch and occupancy optimization initiatives. In addition to final determination of the lease portfolio at the effective date, the initial measurement of the right-of-use asset and the corresponding liability will be affected by certain key assumptions such as expectations of renewals or extensions and the interest rate to be used to discount the future lease obligations. Up through the date of adoption, the evaluation of the impact of the standard will be adjusted based on new leases that are executed, leases that are terminated prior to the effective date, and any leases with changes to key assumptions or expectations such as renewals and extensions, and discount rates. While there will be some changes to income statement classification, the implementation team does not expect the adoption of the standard to have a material impact to pre-tax income. Regions does not anticipate early adoption of the new standard. ASU 2016-13, Measurement of Credit Losses on Financial Instruments This ASU amends Topic 326, Financial Instruments- Credit Losses to replace the current incurred loss accounting model with a current expected credit loss approach (CECL) for financial instruments measured at amortized cost and other commitments to extend credit. The amendments require entities to consider all available relevant information when estimating current expected credit losses, including details about past events, current conditions, and reasonable and supportable forecasts. The resulting allowance for credit losses is to reflect the portion of the amortized cost basis that the entity does not expect to collect. The amendments also eliminate the current accounting model for purchased credit impaired loans and debt securities. Additional quantitative and qualitative disclosures are required upon adoption. January 1, 2020 Early adoption permitted beginning January 1, 2019. Regions has formed a cross-functional implementation team co-led by Finance and Risk Management. The implementation team has developed a project plan and is keeping current with the broader industry’s perspective and insights, delivering educational and awareness sessions across the Company, identifying and researching key decision points, and evaluating the financial and operational implications of adoption. ASU 2017-09, Stock Compensation: Scope of Modification Accounting This ASU amends Topic 718, Compensation- Stock Compensation , and clarifies when modification accounting should be applied to changes in terms or conditions of share-based payment awards. The amendments narrow the scope of modification accounting by clarifying that modification accounting should be applied to awards if the change affects the fair value, vesting conditions, or classification of the award. The amendments do not impact current disclosure requirements for modifications, regardless of whether modification accounting is required under the new guidance. January 1, 2018 Regions is evaluating the impact upon adoption; however, the impact is not expected to be material. Standard Description Required Date of Adoption Effect on Regions' financial statements or other significant matters Standards Not Yet Adopted (continued) ASU 2016-01, Recognition and Measurement of Financial Assets and Liabilities This ASU amends ASC Topic 825, Financial Instruments-Overall , and addresses certain aspects of recognition, measurement, presentation, and disclosure of financial instruments. The main provisions require investments in equity securities to be measured at fair value with changes in the fair value recognized through net income (except for those accounted for under the equity method of accounting or those that result in consolidation of the investee) requires public business entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes and requires an entity to present separately in other comprehensive income, the portion of the total change in the fair value of a liability resulting from a change in the instrument-specific credit risk when the entity has elected to measure the liability at fair value. Except for disclosure requirements that will be adopted prospectively, the ASU must be adopted on a modified retrospective basis. January 1, 2018 Early adoption is permitted for certain provisions as described in the guidance. Regions is evaluating the impact upon adoption; however, the impact is not expected to be material. Regions does not plan to early adopt. ASU 2017-12, Targeted Improvements to Accounting for Hedging Activities This ASU amends ASC 815, Derivatives and Hedging to (1) improve the transparency and understandability of information conveyed to financial statement users about an entity’s risk management activities by better aligning the entity’s financial reporting for hedging relationships with those risk management activities and (2) reduce the complexity of and simplify the application of hedge accounting by preparers. January 1, 2019. Early adoption is permitted. Regions is evaluating the impact upon adoption; however, the impact is not expected to be material. Regions is considering early adoption.

Discontinued Operations (Tables

Discontinued Operations (Tables)	9 Months Ended
	Sep. 30, 2017
Discontinued Operations and Disposal Groups [Abstract]
Schedule of Disposal Groups, Including Discontinued Operations, Income Statement, Balance Sheet and Additional Disclosures	The following table represents the condensed results of operations for discontinued operations: Three Months Ended Nine Months Ended 2017 2016 2017 2016 (In millions, except per share data) Non-interest expense: Professional and legal expenses/(recoveries) $ 1 $ (2 ) $ (10 ) $ (8 ) Other — — 1 1 Total non-interest expense 1 (2 ) (9 ) (7 ) Income (loss) from discontinued operations before income taxes (1 ) 2 9 7 Income tax expense (benefit) — 1 4 3 Income (loss) from discontinued operations, net of tax $ (1 ) $ 1 $ 5 $ 4 Earnings (loss) per common share from discontinued operations: Basic $ (0.00 ) $ 0.00 $ 0.00 $ 0.00 Diluted $ (0.00 ) $ 0.00 $ 0.00 $ 0.00

Securities (Tables)

Securities (Tables)	9 Months Ended
	Sep. 30, 2017
Investments, Debt and Equity Securities [Abstract]
Schedule Of Amortized Cost, Gross Unrealized Gains and Losses, And Estimated Fair Value Of Securities Available For Sale And Securities Held To Maturity [Table Text Block]	The amortized cost, gross unrealized gains and losses, and estimated fair value of securities held to maturity and securities available for sale are as follows: September 30, 2017 Recognized in OCI (1) Not Recognized in OCI Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Carrying Value Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value (In millions) Securities held to maturity: Mortgage-backed securities: Residential agency $ 1,096 $ — $ (42 ) $ 1,054 $ 16 $ (3 ) $ 1,067 Commercial agency 653 — (4 ) 649 6 (2 ) 653 $ 1,749 $ — $ (46 ) $ 1,703 $ 22 $ (5 ) $ 1,720 Securities available for sale: U.S. Treasury securities $ 307 $ 1 $ — $ 308 $ 308 Federal agency securities 24 — — 24 24 Mortgage-backed securities: Residential agency 17,573 89 (178 ) 17,484 17,484 Residential non-agency 3 — — 3 3 Commercial agency 3,630 14 (18 ) 3,626 3,626 Commercial non-agency 803 7 (1 ) 809 809 Corporate and other debt securities 1,179 28 (5 ) 1,202 1,202 Equity securities 193 10 — 203 203 $ 23,712 $ 149 $ (202 ) $ 23,659 $ 23,659 December 31, 2016 Recognized in OCI (1) Not Recognized in OCI Amortized Gross Unrealized Gains Gross Unrealized Losses Carrying Value Gross Gross Estimated (In millions) Securities held to maturity: Mortgage-backed securities: Residential agency $ 1,249 $ — $ (49 ) $ 1,200 $ 12 $ (3 ) $ 1,209 Commercial agency 167 — (5 ) 162 — (2 ) 160 $ 1,416 $ — $ (54 ) $ 1,362 $ 12 $ (5 ) $ 1,369 Securities available for sale: U.S. Treasury securities $ 303 $ 1 $ (1 ) $ 303 $ 303 Federal agency securities 35 — — 35 35 Obligations of states and political subdivisions 1 — — 1 1 Mortgage-backed securities: Residential agency 17,531 95 (255 ) 17,371 17,371 Residential non-agency 4 — — 4 4 Commercial agency 3,486 9 (32 ) 3,463 3,463 Commercial non-agency 1,124 8 (3 ) 1,129 1,129 Corporate and other debt securities 1,272 19 (17 ) 1,274 1,274 Equity securities 194 7 — 201 201 $ 23,950 $ 139 $ (308 ) $ 23,781 $ 23,781 _________ (1) The gross unrealized losses recognized in OCI on securities held to maturity resulted from a transfer of securities available for sale to held to maturity in the second quarter of 2013.
Schedule Of Cost And Estimated Fair Value Of Securities Available For Sale And Securities Held To Maturity By Contractual Maturity	The amortized cost and estimated fair value of securities held to maturity and securities available for sale at September 30, 2017 , by contractual maturity, are shown below. Expected maturities will differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. Amortized Cost Estimated Fair Value (In millions) Securities held to maturity: Mortgage-backed securities: Residential agency $ 1,096 $ 1,067 Commercial agency 653 653 $ 1,749 $ 1,720 Securities available for sale: Due in one year or less $ 37 $ 37 Due after one year through five years 761 771 Due after five years through ten years 570 581 Due after ten years 142 145 Mortgage-backed securities: Residential agency 17,573 17,484 Residential non-agency 3 3 Commercial agency 3,630 3,626 Commercial non-agency 803 809 Equity securities 193 203 $ 23,712 $ 23,659
Schedule Of Gross Unrealized Losses And Estimated Fair Value Of Securities Available For Sale and Held to Maturity	The following tables present gross unrealized losses and the related estimated fair value of securities held to maturity and available for sale at September 30, 2017 and December 31, 2016 . For securities transferred to held to maturity from available for sale, the analysis in the tables below is comparing the securities' original amortized cost to its current estimated fair value. These securities are segregated between investments that have been in a continuous unrealized loss position for less than twelve months and for twelve months or more. September 30, 2017 Less Than Twelve Months Twelve Months or More Total Estimated Fair Value Gross Unrealized Losses Estimated Fair Value Gross Unrealized Losses Estimated Fair Value Gross Unrealized Losses (In millions) Securities held to maturity: Mortgage-backed securities: Residential agency $ 752 $ (18 ) $ 315 $ (11 ) $ 1,067 $ (29 ) Commercial agency — — 153 (6 ) 153 (6 ) $ 752 $ (18 ) $ 468 $ (17 ) $ 1,220 $ (35 ) Securities available for sale: U.S. Treasury securities $ 80 $ — $ 18 $ — $ 98 $ — Mortgage-backed securities: Residential agency 10,060 (139 ) 1,519 (39 ) 11,579 (178 ) Commercial agency 1,490 (15 ) 164 (3 ) 1,654 (18 ) Commercial non-agency 175 (1 ) 30 — 205 (1 ) All other securities 164 (1 ) 104 (4 ) 268 (5 ) $ 11,969 $ (156 ) $ 1,835 $ (46 ) $ 13,804 $ (202 ) December 31, 2016 Less Than Twelve Months Twelve Months or More Total Estimated Gross Estimated Gross Estimated Gross (In millions) Securities held to maturity: Mortgage-backed securities: Residential agency $ 850 $ (26 ) $ 359 $ (14 ) $ 1,209 $ (40 ) Commercial agency — — 160 (7 ) 160 (7 ) $ 850 $ (26 ) $ 519 $ (21 ) $ 1,369 $ (47 ) Securities available for sale: U.S. Treasury securities $ 112 $ (1 ) $ 18 $ — $ 130 $ (1 ) Mortgage-backed securities: Residential agency 12,071 (245 ) 570 (10 ) 12,641 (255 ) Commercial agency 2,199 (31 ) 45 (1 ) 2,244 (32 ) Commercial non-agency 402 (2 ) 176 (1 ) 578 (3 ) All other securities 382 (6 ) 218 (11 ) 600 (17 ) $ 15,166 $ (285 ) $ 1,027 $ (23 ) $ 16,193 $ (308 )
Schedule of Gross Realized Gains And Gross Realized Losses On Available For Sale Securities [Table Text Block]	Three Months Ended September 30 Nine Months Ended September 30 2017 2016 2017 2016 (In millions) Gross realized gains $ 5 $ 1 $ 9 $ 30 Gross realized losses — (1 ) (3 ) (28 ) OTTI (1 ) — (1 ) (1 ) Securities available for sale gains (losses), net (1) $ 4 $ — $ 5 $ 1 ________ (1) The securities gains (losses), net balances above exclude net trading securities gains of $4 million recognized during the third quarter of 2017.

Loans and the Allowance for C27

Loans and the Allowance for Credit Losses (Tables)	9 Months Ended
	Sep. 30, 2017
Receivables [Abstract]
Schedule of Accounts, Notes, Loans and Financing Receivable	The following table presents the distribution of Regions' loan portfolio by segment and class, net of unearned income: September 30, 2017 December 31, 2016 (In millions, net of unearned income) Commercial and industrial $ 35,443 $ 35,012 Commercial real estate mortgage—owner-occupied 6,284 6,867 Commercial real estate construction—owner-occupied 335 334 Total commercial 42,062 42,213 Commercial investor real estate mortgage 3,999 4,087 Commercial investor real estate construction 1,936 2,387 Total investor real estate 5,935 6,474 Residential first mortgage 13,903 13,440 Home equity 10,276 10,687 Indirect—vehicles 3,489 4,040 Indirect—other consumer 1,318 920 Consumer credit card 1,214 1,196 Other consumer 1,159 1,125 Total consumer 31,359 31,408 $ 79,356 $ 80,095
Analysis of the Allowance for Credit Losses by Portfolio Segment	The following tables present analyses of the allowance for credit losses by portfolio segment for the three and nine months ended September 30, 2017 and 2016 . The total allowance for loan losses and the related loan portfolio ending balances are disaggregated to detail the amounts derived through individual evaluation and collective evaluation for impairment. The allowance for loan losses related to individually evaluated loans is attributable to reserves for non-accrual commercial and investor real estate loans and all TDRs. The allowance for loan losses and the loan portfolio ending balances related to collectively evaluated loans is attributable to the remainder of the portfolio. Three Months Ended September 30, 2017 Commercial Investor Real Estate Consumer Total (In millions) Allowance for loan losses, July 1, 2017 $ 707 $ 82 $ 252 $ 1,041 Provision (credit) for loan losses 8 (8 ) 76 76 Loan losses: Charge-offs (43 ) — (63 ) (106 ) Recoveries 11 3 16 30 Net loan losses (32 ) 3 (47 ) (76 ) Allowance for loan losses, September 30, 2017 683 77 281 1,041 Reserve for unfunded credit commitments, July 1, 2017 63 4 — 67 Provision (credit) for unfunded credit losses (8 ) — — (8 ) Reserve for unfunded credit commitments, September 30, 2017 55 4 — 59 Allowance for credit losses, September 30, 2017 $ 738 $ 81 $ 281 $ 1,100 Three Months Ended September 30, 2016 Commercial Investor Real Estate Consumer Total (In millions) Allowance for loan losses, July 1, 2016 $ 825 $ 87 $ 239 $ 1,151 Provision (credit) for loan losses (15 ) (7 ) 51 29 Loan losses: Charge-offs (31 ) (1 ) (62 ) (94 ) Recoveries 19 5 16 40 Net loan losses (12 ) 4 (46 ) (54 ) Allowance for loan losses, September 30, 2016 798 84 244 1,126 Reserve for unfunded credit commitments, July 1, 2016 59 5 — 64 Provision (credit) for unfunded credit losses 8 — — 8 Reserve for unfunded credit commitments, September 30, 2016 67 5 — 72 Allowance for credit losses, September 30, 2016 $ 865 $ 89 $ 244 $ 1,198 Nine Months Ended September 30, 2017 Commercial Investor Real Estate Consumer Total (In millions) Allowance for loan losses, January 1, 2017 $ 753 $ 85 $ 253 $ 1,091 Provision (credit) for loan losses 41 (16 ) 169 194 Loan losses: Charge-offs (139 ) (2 ) (188 ) (329 ) Recoveries 28 10 47 85 Net loan losses (111 ) 8 (141 ) (244 ) Allowance for loan losses, September 30, 2017 683 77 281 1,041 Reserve for unfunded credit commitments, January 1, 2017 64 5 — 69 Provision (credit) for unfunded credit losses (9 ) (1 ) — (10 ) Reserve for unfunded credit commitments, September 30, 2017 55 4 — 59 Allowance for credit losses, September 30, 2017 $ 738 $ 81 $ 281 $ 1,100 Portion of ending allowance for loan losses: Individually evaluated for impairment $ 202 $ 19 $ 52 $ 273 Collectively evaluated for impairment 481 58 229 768 Total allowance for loan losses $ 683 $ 77 $ 281 $ 1,041 Portion of loan portfolio ending balance: Individually evaluated for impairment $ 898 $ 108 $ 727 $ 1,733 Collectively evaluated for impairment 41,164 5,827 30,632 77,623 Total loans evaluated for impairment $ 42,062 $ 5,935 $ 31,359 $ 79,356 Nine Months Ended September 30, 2016 Commercial Investor Real Estate Consumer Total (In millions) Allowance for loan losses, January 1, 2016 $ 758 $ 97 $ 251 $ 1,106 Provision (credit) for loan losses 108 (21 ) 127 214 Loan losses: Charge-offs (102 ) (2 ) (184 ) (288 ) Recoveries 34 10 50 94 Net loan losses (68 ) 8 (134 ) (194 ) Allowance for loan losses, September 30, 2016 798 84 244 1,126 Reserve for unfunded credit commitments, January 1, 2016 47 5 — 52 Provision (credit) for unfunded credit losses 20 — — 20 Reserve for unfunded credit commitments, September 30, 2016 67 5 — 72 Allowance for credit losses, September 30, 2016 $ 865 $ 89 $ 244 $ 1,198 Portion of ending allowance for loan losses: Individually evaluated for impairment $ 252 $ 19 $ 62 $ 333 Collectively evaluated for impairment 546 65 182 793 Total allowance for loan losses $ 798 $ 84 $ 244 $ 1,126 Portion of loan portfolio ending balance: Individually evaluated for impairment $ 1,119 $ 140 $ 785 $ 2,044 Collectively evaluated for impairment 41,625 6,624 30,590 78,839 Total loans evaluated for impairment $ 42,744 $ 6,764 $ 31,375 $ 80,883
Financing Receivable Credit Quality Indicators	September 30, 2017 Pass Special Mention Substandard Accrual Non-accrual Total (In millions) Commercial and industrial $ 33,323 $ 627 $ 1,000 $ 493 $ 35,443 Commercial real estate mortgage—owner-occupied 5,780 178 186 140 6,284 Commercial real estate construction—owner-occupied 315 6 8 6 335 Total commercial $ 39,418 $ 811 $ 1,194 $ 639 $ 42,062 Commercial investor real estate mortgage $ 3,729 $ 128 $ 137 $ 5 $ 3,999 Commercial investor real estate construction 1,888 2 46 — 1,936 Total investor real estate $ 5,617 $ 130 $ 183 $ 5 $ 5,935 Accrual Non-accrual Total (In millions) Residential first mortgage $ 13,858 $ 45 $ 13,903 Home equity 10,206 70 10,276 Indirect—vehicles 3,488 1 3,489 Indirect—other consumer 1,318 — 1,318 Consumer credit card 1,214 — 1,214 Other consumer 1,159 — 1,159 Total consumer $ 31,243 $ 116 $ 31,359 $ 79,356 December 31, 2016 Pass Special Mention Substandard Accrual Non-accrual Total (In millions) Commercial and industrial $ 32,619 $ 658 $ 1,112 $ 623 $ 35,012 Commercial real estate mortgage—owner-occupied 6,190 221 246 210 6,867 Commercial real estate construction—owner-occupied 308 8 15 3 334 Total commercial $ 39,117 $ 887 $ 1,373 $ 836 $ 42,213 Commercial investor real estate mortgage $ 3,766 $ 190 $ 114 $ 17 $ 4,087 Commercial investor real estate construction 2,192 129 66 — 2,387 Total investor real estate $ 5,958 $ 319 $ 180 $ 17 $ 6,474 Accrual Non-accrual Total (In millions) Residential first mortgage $ 13,390 $ 50 $ 13,440 Home equity 10,595 92 10,687 Indirect—vehicles 4,040 — 4,040 Indirect—other consumer 920 — 920 Consumer credit card 1,196 — 1,196 Other consumer 1,125 — 1,125 Total consumer $ 31,266 $ 142 $ 31,408 $ 80,095
Past Due Financing Receivables	The following tables include an aging analysis of DPD for each portfolio segment and class as of September 30, 2017 and December 31, 2016 : September 30, 2017 Accrual Loans 30-59 DPD 60-89 DPD 90+ DPD Total 30+ DPD Total Accrual Non-accrual Total (In millions) Commercial and industrial $ 26 $ 20 $ 5 $ 51 $ 34,950 $ 493 $ 35,443 Commercial real estate mortgage—owner-occupied 16 4 4 24 6,144 140 6,284 Commercial real estate construction—owner-occupied — — — — 329 6 335 Total commercial 42 24 9 75 41,423 639 42,062 Commercial investor real estate mortgage 7 — — 7 3,994 5 3,999 Commercial investor real estate construction 29 — — 29 1,936 — 1,936 Total investor real estate 36 — — 36 5,930 5 5,935 Residential first mortgage 90 59 174 323 13,858 45 13,903 Home equity 59 30 33 122 10,206 70 10,276 Indirect—vehicles 45 13 9 67 3,488 1 3,489 Indirect—other consumer 8 5 — 13 1,318 — 1,318 Consumer credit card 11 7 16 34 1,214 — 1,214 Other consumer 12 4 4 20 1,159 — 1,159 Total consumer 225 118 236 579 31,243 116 31,359 $ 303 $ 142 $ 245 $ 690 $ 78,596 $ 760 $ 79,356 December 31, 2016 Accrual Loans 30-59 DPD 60-89 DPD 90+ DPD Total 30+ DPD Total Accrual Non-accrual Total (In millions) Commercial and industrial $ 59 $ 11 $ 6 $ 76 $ 34,389 $ 623 $ 35,012 Commercial real estate mortgage—owner-occupied 29 7 2 38 6,657 210 6,867 Commercial real estate construction—owner-occupied 1 — — 1 331 3 334 Total commercial 89 18 8 115 41,377 836 42,213 Commercial investor real estate mortgage 6 8 — 14 4,070 17 4,087 Commercial investor real estate construction — — — — 2,387 — 2,387 Total investor real estate 6 8 — 14 6,457 17 6,474 Residential first mortgage 99 63 212 374 13,390 50 13,440 Home equity 60 22 33 115 10,595 92 10,687 Indirect—vehicles 56 14 10 80 4,040 — 4,040 Indirect—other consumer 5 3 — 8 920 — 920 Consumer credit card 9 7 15 31 1,196 — 1,196 Other consumer 13 5 5 23 1,125 — 1,125 Total consumer 242 114 275 631 31,266 142 31,408 $ 337 $ 140 $ 283 $ 760 $ 79,100 $ 995 $ 80,095
Impaired Financing Receivables	The following tables present details related to the Company’s impaired loans as of September 30, 2017 and December 31, 2016 . Loans deemed to be impaired include all TDRs and all non-accrual commercial and investor real estate loans, excluding leases. Loans that have been fully charged-off do not appear in the tables below. Non-accrual Impaired Loans As of September 30, 2017 Book Value (3) Unpaid Principal Balance (1) Charge-offs and Payments Applied (2) Total Impaired Loans on Non-accrual Status Impaired Loans on Non-accrual Status with No Related Allowance Impaired Loans on Non-accrual Status with Related Allowance Related Allowance for Loan Losses Coverage % (4) (Dollars in millions) Commercial and industrial $ 599 $ 110 $ 489 $ 60 $ 429 $ 124 39.1 % Commercial real estate mortgage—owner-occupied 156 16 140 12 128 38 34.6 Commercial real estate construction—owner-occupied 6 — 6 — 6 2 33.3 Total commercial 761 126 635 72 563 164 38.1 Commercial investor real estate mortgage 6 1 5 1 4 2 50.0 Total investor real estate 6 1 5 1 4 2 50.0 Residential first mortgage 28 1 27 — 27 3 14.3 Home equity 11 1 10 — 10 — 9.1 Total consumer 39 2 37 — 37 3 12.8 $ 806 $ 129 $ 677 $ 73 $ 604 $ 169 37.0 % Accruing Impaired Loans As of September 30, 2017 Unpaid Principal Balance (1) Charge-offs and Payments Applied (2) Book Value (3) Related Allowance for Loan Losses Coverage % (4) (Dollars in millions) Commercial and industrial $ 207 $ 6 $ 201 $ 32 18.4 % Commercial real estate mortgage—owner-occupied 64 3 61 6 14.1 Commercial real estate construction—owner-occupied 1 — 1 — — Total commercial 272 9 263 38 17.3 Commercial investor real estate mortgage 77 2 75 12 18.2 Commercial investor real estate construction 29 1 28 5 20.7 Total investor real estate 106 3 103 17 18.9 Residential first mortgage 418 — 418 45 10.8 Home equity 263 1 262 4 1.9 Indirect—vehicles — — — — — Consumer credit card 1 — 1 — — Other consumer 9 — 9 — — Total consumer 691 1 690 49 7.2 $ 1,069 $ 13 $ 1,056 $ 104 10.9 % Total Impaired Loans As of September 30, 2017 Book Value (3) Unpaid Principal Balance (1) Charge-offs and Payments Applied (2) Total Impaired Loans Impaired Loans with No Related Allowance Impaired Loans with Related Allowance Related Allowance for Loan Losses Coverage % (4) (Dollars in millions) Commercial and industrial $ 806 $ 116 $ 690 $ 60 $ 630 $ 156 33.7 % Commercial real estate mortgage—owner-occupied 220 19 201 12 189 44 28.6 Commercial real estate construction—owner-occupied 7 — 7 — 7 2 28.6 Total commercial 1,033 135 898 72 826 202 32.6 Commercial investor real estate mortgage 83 3 80 1 79 14 20.5 Commercial investor real estate construction 29 1 28 — 28 5 20.7 Total investor real estate 112 4 108 1 107 19 20.5 Residential first mortgage 446 1 445 — 445 48 11.0 Home equity 274 2 272 — 272 4 2.2 Indirect—vehicles — — — — — — — Consumer credit card 1 — 1 — 1 — — Other consumer 9 — 9 — 9 — — Total consumer 730 3 727 — 727 52 7.5 $ 1,875 $ 142 $ 1,733 $ 73 $ 1,660 $ 273 22.1 % Non-accrual Impaired Loans As of December 31, 2016 Book Value (3) Unpaid Principal Balance (1) Charge-offs and Payments Applied (2) Total Impaired Loans on Non-accrual Status Impaired Loans on Non-accrual Status with No Related Allowance Impaired Loans on Non-accrual Status with Related Allowance Related Allowance for Loan Losses Coverage % (4) (Dollars in millions) Commercial and industrial $ 685 $ 72 $ 613 $ 126 $ 487 $ 138 30.7 % Commercial real estate mortgage—owner-occupied 231 21 210 39 171 53 32.0 Commercial real estate construction—owner-occupied 4 1 3 — 3 2 75.0 Total commercial 920 94 826 165 661 193 31.2 Commercial investor real estate mortgage 18 1 17 5 12 5 33.3 Total investor real estate 18 1 17 5 12 5 33.3 Residential first mortgage 41 12 29 — 29 4 39.0 Home equity 12 1 11 — 11 — 8.3 Total consumer 53 13 40 — 40 4 32.1 $ 991 $ 108 $ 883 $ 170 $ 713 $ 202 31.3 % Accruing Impaired Loans As of December 31, 2016 Unpaid Principal Balance (1) Charge-offs and Payments Applied (2) Book Value (3) Related Allowance for Loan Losses Coverage % (4) (Dollars in millions) Commercial and industrial $ 187 $ 1 $ 186 $ 33 18.2 % Commercial real estate mortgage—owner-occupied 60 4 56 5 15.0 Commercial real estate construction—owner-occupied 1 — 1 — — Total commercial 248 5 243 38 17.3 Commercial investor real estate mortgage 82 8 74 7 18.3 Commercial investor real estate construction 16 — 16 1 6.3 Total investor real estate 98 8 90 8 16.3 Residential first mortgage 435 10 425 51 14.0 Home equity 292 — 292 5 1.7 Indirect—vehicles 1 — 1 — — Consumer credit card 2 — 2 — — Other consumer 10 — 10 — — Total consumer 740 10 730 56 8.9 $ 1,086 $ 23 $ 1,063 $ 102 11.5 % Total Impaired Loans As of December 31, 2016 Book Value (3) Unpaid Principal Balance (1) Charge-offs and Payments Applied (2) Total Impaired Loans Impaired Loans with No Related Allowance Impaired Loans with Related Allowance Related Allowance for Loan Losses Coverage % (4) (Dollars in millions) Commercial and industrial $ 872 $ 73 $ 799 $ 126 $ 673 $ 171 28.0 % Commercial real estate mortgage—owner-occupied 291 25 266 39 227 58 28.5 Commercial real estate construction—owner-occupied 5 1 4 — 4 2 60.0 Total commercial 1,168 99 1,069 165 904 231 28.3 Commercial investor real estate mortgage 100 9 91 5 86 12 21.0 Commercial investor real estate construction 16 — 16 — 16 1 6.3 Total investor real estate 116 9 107 5 102 13 19.0 Residential first mortgage 476 22 454 — 454 55 16.2 Home equity 304 1 303 — 303 5 2.0 Indirect—vehicles 1 — 1 — 1 — — Consumer credit card 2 — 2 — 2 — — Other consumer 10 — 10 — 10 — — Total consumer 793 23 770 — 770 60 10.5 $ 2,077 $ 131 $ 1,946 $ 170 $ 1,776 $ 304 20.9 % ________ (1) Unpaid principal balance represents the contractual obligation due from the customer and includes the net book value plus charge-offs and payments applied. (2) Charge-offs and payments applied represents cumulative partial charge-offs taken, as well as interest payments received that have been applied against the outstanding principal balance. (3) Book value represents the unpaid principal balance less charge-offs and payments applied; it is shown before any allowance for loan losses. (4) Coverage % represents charge-offs and payments applied plus the related allowance as a percent of the unpaid principal balance. The following table presents the average balances of total impaired loans and interest income for the three and nine months ended September 30, 2017 and 2016 . Interest income recognized represents interest on accruing loans modified in a TDR. Three Months Ended September 30 Nine Months Ended September 30 2017 2016 2017 2016 Average Balance Interest Income Recognized Average Balance Interest Income Recognized Average Balance Interest Income Recognized Average Balance Interest Income Recognized (In millions) Commercial and industrial $ 748 $ 3 $ 816 $ 1 $ 804 $ 9 $ 670 $ 4 Commercial real estate mortgage—owner-occupied 209 2 296 1 234 4 313 3 Commercial real estate construction—owner-occupied 5 — 4 — 5 — 3 — Total commercial 962 5 1,116 2 1,043 13 986 7 Commercial investor real estate mortgage 93 1 117 1 87 3 128 4 Commercial investor real estate construction 40 1 36 1 42 2 31 1 Total investor real estate 133 2 153 2 129 5 159 5 Residential first mortgage 448 4 464 4 454 12 473 12 Home equity 275 4 317 3 285 11 328 12 Consumer credit card 2 — 2 — 2 — 2 — Other consumer 9 — 11 1 10 — 12 1 Total consumer 734 8 794 8 751 23 815 25 Total impaired loans $ 1,829 $ 15 $ 2,063 $ 12 $ 1,923 $ 41 $ 1,960 $ 37
Troubled Debt Restructurings on Financing Receivables	The following tables present the end of period balance for loans modified in a TDR during the periods presented by portfolio segment and class, and the financial impact of those modifications. The tables include modifications made to new TDRs, as well as renewals of existing TDRs. Loans first reported as TDRs during the nine months ended September 30, 2017 and 2016 totaled approximately $456 million and $347 million , respectively. Three Months Ended September 30, 2017 Financial Impact of Modifications Considered TDRs Number of Obligors Recorded Investment Increase in Allowance at Modification (Dollars in millions) Commercial and industrial 37 $ 157 $ 2 Commercial real estate mortgage—owner-occupied 33 32 1 Total commercial 70 189 3 Commercial investor real estate mortgage 8 45 2 Total investor real estate 8 45 2 Residential first mortgage 67 9 1 Home equity 10 1 — Consumer credit card 11 — — Indirect—vehicles and other consumer 38 1 — Total consumer 126 11 1 204 $ 245 $ 6 Three Months Ended September 30, 2016 Financial Impact of Modifications Considered TDRs Number of Obligors Recorded Investment Increase in Allowance at Modification (Dollars in millions) Commercial and industrial 47 $ 117 $ 2 Commercial real estate mortgage—owner-occupied 22 26 1 Total commercial 69 143 3 Commercial investor real estate mortgage 19 27 — Commercial investor real estate construction 3 25 1 Total investor real estate 22 52 1 Residential first mortgage 51 9 1 Home equity 57 2 — Consumer credit card 14 1 — Indirect—vehicles and other consumer 47 1 — Total consumer 169 13 1 260 $ 208 $ 5 Nine Months Ended September 30, 2017 Financial Impact Number of Recorded Increase in (Dollars in millions) Commercial and industrial 106 $ 449 $ 9 Commercial real estate mortgage—owner-occupied 94 97 3 Commercial real estate construction—owner-occupied 3 2 — Total commercial 203 548 12 Commercial investor real estate mortgage 33 93 3 Commercial investor real estate construction 5 70 2 Total investor real estate 38 163 5 Residential first mortgage 168 34 4 Home equity 101 8 — Consumer credit card 54 — — Indirect—vehicles and other consumer 125 2 — Total consumer 448 44 4 689 $ 755 $ 21 Nine Months Ended September 30, 2016 Financial Impact Number of Recorded Increase in (Dollars in millions) Commercial and industrial 142 $ 298 $ 8 Commercial real estate mortgage—owner-occupied 98 60 2 Total commercial 240 358 10 Commercial investor real estate mortgage 68 87 1 Commercial investor real estate construction 8 36 1 Total investor real estate 76 123 2 Residential first mortgage 189 38 5 Home equity 263 13 — Consumer credit card 65 1 — Indirect—vehicles and other consumer 148 2 — Total consumer 665 54 5 981 $ 535 $ 17 Defaulted TDRs The following table presents, by portfolio segment and class, TDRs that defaulted during the three and nine months ended September 30, 2017 and 2016 , and that were modified in the previous twelve months (i.e., the twelve months prior to the default). For purposes of this disclosure, default is defined as placement on non-accrual status for the commercial and investor real estate portfolio segments, and 90 days past due and still accruing for the consumer portfolio segment. Consideration of defaults in the calculation of the allowance for loan losses is described in detail in the consolidated financial statements included in the Annual Report on Form 10-K for the year ended December 31, 2016 . Three Months Ended September 30 Nine Months Ended September 30 2017 2016 2017 2016 (In millions) Defaulted During the Period, Where Modified in a TDR Twelve Months Prior to Default Commercial and industrial $ 1 $ 16 $ 9 $ 28 Commercial real estate mortgage—owner-occupied 1 1 1 2 Total commercial 2 17 10 30 Commercial investor real estate mortgage — 1 — 2 Commercial investor real estate construction — 1 — 1 Total investor real estate — 2 — 3 Residential first mortgage 1 7 6 18 Home equity — — 1 1 Total consumer 1 7 7 19 $ 3 $ 26 $ 17 $ 52

Servicing of Financial Assets (

Servicing of Financial Assets (Tables)	9 Months Ended
	Sep. 30, 2017
Transfers and Servicing of Financial Assets [Abstract]
Schedule of Residential Mortgage Servicing Rights Under The Fair Value Measurement Method	The table below presents an analysis of residential MSRs under the fair value measurement method: Three Months Ended September 30 Nine Months Ended September 30 2017 2016 2017 2016 (In millions) Carrying value, beginning of period $ 346 $ 216 $ 324 $ 252 Additions 10 34 56 73 Increase (decrease) in fair value (1) : Due to change in valuation inputs or assumptions (9 ) (2 ) (12 ) (60 ) Economic amortization associated with borrower repayments (12 ) (10 ) (33 ) (27 ) Carrying value, end of period $ 335 $ 238 $ 335 $ 238 ________ (1) "Economic amortization associated with borrower repayments" includes both total loan payoffs as well as partial paydowns.
Data And Assumptions Used In The Fair Value Calculation As Well As The Valuation's Sensitivity To Rate Fluctuations Related To Residential Mortgage Servicing Rights	Data and assumptions used in the fair value calculation, as well as the valuation’s sensitivity to rate fluctuations, related to residential MSRs (excluding related derivative instruments) are as follows: September 30 2017 2016 (Dollars in millions) Unpaid principal balance $ 32,586 $ 29,657 Weighted-average prepayment speed (CPR; percentage) 10.0 % 12.3 % Estimated impact on fair value of a 10% increase $ (22 ) $ (13 ) Estimated impact on fair value of a 20% increase $ (40 ) $ (24 ) Option-adjusted spread (basis points) 860 1,060 Estimated impact on fair value of a 10% increase $ (11 ) $ (9 ) Estimated impact on fair value of a 20% increase $ (23 ) $ (18 ) Weighted-average coupon interest rate 4.1 % 4.2 % Weighted-average remaining maturity (months) 282 280 Weighted-average servicing fee (basis points) 27.4 27.6
Schedule Of Fees Resulting From The Servicing Of Residential Mortgage Loans	The following table presents servicing related fees, which includes contractually specified servicing fees, late fees and other ancillary income resulting from the servicing of residential mortgage loans: Three Months Ended September 30 Nine Months Ended September 30 2017 2016 2017 2016 (In millions) Servicing related fees and other ancillary income $ 24 $ 21 $ 71 $ 63

Goodwill (Tables)

Goodwill (Tables)	9 Months Ended
	Sep. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Goodwill	Goodwill allocated to each reportable segment (each a reporting unit) is presented as follows: September 30, 2017 December 31, 2016 (In millions) Corporate Bank $ 2,474 $ 2,474 Consumer Bank 1,978 1,978 Wealth Management 452 452 $ 4,904 $ 4,904

Stockholders' Equity and Accu30

Stockholders' Equity and Accumulated Other Comprehensive Income (Loss) (Tables)	9 Months Ended
	Sep. 30, 2017
Equity [Abstract]
Summary of the non-cumulative perpetual preferred stock	The following table presents a summary of the non-cumulative perpetual preferred stock: September 30, 2017 December 31, 2016 Issuance Date Earliest Redemption Date Dividend Rate Liquidation Amount Carrying Amount Carrying Amount (Dollars in millions) Series A 11/1/2012 12/15/2017 6.375 % $ 500 $ 387 $ 387 Series B 4/29/2014 9/15/2024 6.375 % (1) 500 433 433 $ 1,000 $ 820 $ 820 _________ (1) Dividends, if declared, will be paid quarterly at an annual rate equal to (i) for each period beginning prior to September 15, 2024, 6.375% , and (ii) for each period beginning on or after September 15, 2024, three-month LIBOR plus 3.536% .
Schedule of Accumulated Other Comprehensive Income (Loss)	Activity within the balances in accumulated other comprehensive income (loss), net is shown in the following tables: Three Months Ended September 30, 2017 Unrealized losses on securities transferred to held to maturity Unrealized gains (losses) on securities available for sale Unrealized gains (losses) on derivative instruments designated as cash flow hedges Defined benefit pension plans and other post employment benefits Accumulated other comprehensive income (loss), net of tax (In millions) Beginning of period $ (30 ) $ (55 ) $ 11 $ (405 ) $ (479 ) Net change 1 21 (4 ) 7 25 End of period $ (29 ) $ (34 ) $ 7 $ (398 ) $ (454 ) Three Months Ended September 30, 2016 Unrealized losses on securities transferred to held to maturity Unrealized gains (losses) on securities available for sale Unrealized gains (losses) on derivative instruments designated as cash flow hedges Defined benefit pension plans and other post employment benefits Accumulated other comprehensive (In millions) Beginning of period $ (40 ) $ 297 $ 278 $ (387 ) $ 148 Net change 5 (13 ) (40 ) 5 (43 ) End of period $ (35 ) $ 284 $ 238 $ (382 ) $ 105 Nine Months Ended September 30, 2017 Unrealized losses on securities transferred to held to maturity Unrealized gains (losses) on securities available for sale Unrealized gains (losses) on derivative instruments designated as cash flow hedges Defined benefit pension plans and other post employment benefits Accumulated other comprehensive (In millions) Beginning of period $ (33 ) $ (106 ) $ 11 $ (422 ) $ (550 ) Net change 4 72 (4 ) 24 96 End of period $ (29 ) $ (34 ) $ 7 $ (398 ) $ (454 ) Nine Months Ended September 30, 2016 Unrealized losses on securities transferred to held to maturity Unrealized gains (losses) on securities available for sale Unrealized gains (losses) on derivative instruments designated as cash flow hedges Defined benefit pension plans and other post employment benefits Accumulated other comprehensive (In millions) Beginning of period $ (47 ) $ (10 ) $ 75 $ (398 ) $ (380 ) Net change 12 294 163 16 485 End of period $ (35 ) $ 284 $ 238 $ (382 ) $ 105
Reclassification From Accumulated Other Comprehensive Income (Loss)	The following table presents amounts reclassified out of accumulated other comprehensive income (loss) for the three and nine months ended September 30, 2017 and 2016 : Three Months Ended September 30, 2017 Three Months Ended September 30, 2016 Details about Accumulated Other Comprehensive Income (Loss) Components Amount Reclassified from Accumulated Other Comprehensive Income (Loss) (1) Amount Reclassified from Accumulated Other Comprehensive Income (Loss) (1) Affected Line Item in the Consolidated Statements of Income (In millions) Unrealized losses on securities transferred to held to maturity: $ (2 ) $ (9 ) Net interest income and other financing income 1 4 Tax (expense) or benefit $ (1 ) $ (5 ) Net of tax Unrealized gains and (losses) on available for sale securities: $ 4 $ — Securities gains (losses), net (2 ) — Tax (expense) or benefit $ 2 $ — Net of tax Gains and (losses) on cash flow hedges: Interest rate contracts $ 17 $ 35 Net interest income and other financing income (7 ) (13 ) Tax (expense) or benefit $ 10 $ 22 Net of tax Amortization of defined benefit pension plans and other post employment benefits: Actuarial gains (losses) and settlements $ (11 ) $ (9 ) (2) (11 ) (9 ) Total before tax 4 3 Tax (expense) or benefit $ (7 ) $ (6 ) Net of tax Total reclassifications for the period $ 4 $ 11 Net of tax Nine Months Ended September 30, 2017 Nine Months Ended September 30, 2016 Details about Accumulated Other Comprehensive Income (Loss) Components Amount Reclassified from Accumulated Other Comprehensive Income (Loss) (1) Amount Reclassified from Accumulated Other Comprehensive Income (Loss) (1) Affected Line Item in the Consolidated Statements of Income (In millions) Unrealized losses on securities transferred to held to maturity: $ (7 ) $ (20 ) Net interest income and other financing income 3 8 Tax (expense) or benefit $ (4 ) $ (12 ) Net of tax Unrealized gains and (losses) on available for sale securities: $ 5 $ 1 Securities gains (losses), net (2 ) — Tax (expense) or benefit $ 3 $ 1 Net of tax Gains and (losses) on cash flow hedges: Interest rate contracts $ 70 $ 109 Net interest income and other financing income (27 ) (41 ) Tax (expense) or benefit $ 43 $ 68 Net of tax Amortization of defined benefit pension plans and other post employment benefits: Actuarial gains (losses) and settlements $ (39 ) $ (26 ) (2) (39 ) (26 ) Total before tax 14 9 Tax (expense) or benefit $ (25 ) $ (17 ) Net of tax Total reclassifications for the period $ 17 $ 40 Net of tax ________ (1) Amounts in parentheses indicate reductions to net income. (2) These accumulated other comprehensive income (loss) components are included in the computation of net periodic pension cost and are included in salaries and employee benefits on the consolidated statements of income (see Note 10 for additional details).

Earnings (Loss) Per Common Sh31

Earnings (Loss) Per Common Share (Tables)	9 Months Ended
	Sep. 30, 2017
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted	The following table sets forth the computation of basic earnings (loss) per common share and diluted earnings (loss) per common share: Three Months Ended September 30 Nine Months Ended September 30 2017 2016 2017 2016 (In millions, except per share amounts) Numerator: Income from continuing operations $ 312 $ 319 $ 923 $ 864 Preferred stock dividends (16 ) (16 ) (48 ) (48 ) Income from continuing operations available to common shareholders 296 303 875 816 Income (loss) from discontinued operations, net of tax (1 ) 1 5 4 Net income available to common shareholders $ 295 $ 304 $ 880 $ 820 Denominator: Weighted-average common shares outstanding—basic 1,182 1,246 1,197 1,266 Potential common shares 11 6 12 4 Weighted-average common shares outstanding—diluted 1,193 1,252 1,209 1,270 Earnings per common share from continuing operations available to common shareholders (1) : Basic $ 0.25 $ 0.24 $ 0.73 $ 0.64 Diluted 0.25 0.24 0.72 0.64 Earnings (loss) per common share from discontinued operations (1) : Basic $ (0.00 ) $ 0.00 $ 0.00 $ 0.00 Diluted (0.00 ) 0.00 0.00 0.00 Earnings per common share (1) : Basic $ 0.25 $ 0.24 $ 0.74 $ 0.65 Diluted 0.25 0.24 0.73 0.65 ________ (1) Certain per share amounts may not appear to reconcile due to rounding.

Share-Based Payments (Tables)

Share-Based Payments (Tables)	9 Months Ended
	Sep. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule of Share-based Compensation, Stock Options, Activity	The following table summarizes the activity related to stock options: Nine Months Ended September 30 2017 2016 Number of Options Weighted-Average Exercise Price Number of Options Weighted-Average Exercise Price Outstanding at beginning of period 13,455,047 $ 19.37 19,350,157 $ 21.06 Exercised (1,114,766 ) 6.66 (568,882 ) 5.86 Forfeited or expired (2,727,357 ) 34.51 (3,840,704 ) 34.68 Outstanding at end of period 9,612,924 $ 16.55 14,940,571 $ 18.14 Exercisable at end of period 9,612,924 $ 16.55 14,940,571 $ 18.14
Summary Of Activity Related To Restricted Stock Awards And Performance Stock Awards	The following table summarizes the activity related to restricted stock awards and performance stock awards: Nine Months Ended September 30 2017 2016 Number of Shares Weighted-Average Grant Date Fair Value Number of Shares Weighted-Average Non-vested at beginning of period 16,558,942 $ 9.31 16,374,242 $ 9.51 Granted 3,976,193 14.57 6,840,385 7.92 Vested (4,623,917 ) 11.08 (5,735,271 ) 8.25 Forfeited (522,258 ) 10.00 (686,347 ) 9.18 Non-vested at end of period 15,388,960 $ 10.12 16,793,009 $ 9.31

Pension and Other Postretirem33

Pension and Other Postretirement Benefits (Tables)	9 Months Ended
	Sep. 30, 2017
Defined Benefit Plan [Abstract]
Schedule of Net Periodic Pension Cost	Net periodic pension cost, which is recorded in salaries and employee benefits on the consolidated statements of income, included the following components: Qualified Plans Non-qualified Plans Total Three Months Ended September 30 2017 2016 2017 2016 2017 2016 (In millions) Service cost $ 8 $ 9 $ 1 $ 1 $ 9 $ 10 Interest cost 18 19 1 1 19 20 Expected return on plan assets (35 ) (36 ) — — (35 ) (36 ) Amortization of actuarial loss 8 8 1 1 9 9 Settlement charge — — 2 — 2 — Net periodic pension cost (credit) $ (1 ) $ — $ 5 $ 3 $ 4 $ 3 Qualified Plans Non-qualified Plans Total Nine Months Ended September 30 2017 2016 2017 2016 2017 2016 (In millions) Service cost $ 25 $ 26 $ 3 $ 3 $ 28 $ 29 Interest cost 54 55 3 4 57 59 Expected return on plan assets (106 ) (108 ) — — (106 ) (108 ) Amortization of actuarial loss 24 24 3 2 27 26 Settlement charge — — 12 — 12 — Net periodic pension cost (credit) $ (3 ) $ (3 ) $ 21 $ 9 $ 18 $ 6

Derivative Financial Instrume34

Derivative Financial Instruments and Hedging Activities (Tables)	9 Months Ended
	Sep. 30, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule Of Derivative Instruments Notional And Fair Values	The following tables present the notional amount and estimated fair value of derivative instruments on a gross basis as of September 30, 2017 and December 31, 2016 . The variation margin payments made during 2017 for derivatives cleared through the Chicago Mercantile Exchange are legally characterized as settlements of the derivatives. As a result, these variation margin payments are netted against the fair value of the respective derivative contracts in the balance sheet and related disclosures. September 30, 2017 December 31, 2016 Notional Amount Estimated Fair Value Notional Amount Estimated Fair Value Gain (1) Loss (1) Gain (1) Loss (1) (In millions) Derivatives in fair value hedging relationships: Interest rate swaps $ 3,130 $ 1 $ 37 $ 2,257 $ 7 $ 40 Derivatives in cash flow hedging relationships: Interest rate swaps 7,150 21 153 9,000 19 269 Total derivatives designated as hedging instruments $ 10,280 $ 22 $ 190 $ 11,257 $ 26 $ 309 Derivatives not designated as hedging instruments: Interest rate swaps $ 40,124 $ 315 $ 352 $ 41,851 $ 412 $ 467 Interest rate options 3,787 20 10 3,877 24 12 Interest rate futures and forward commitments 27,944 4 7 18,605 11 6 Other contracts 5,551 53 46 5,813 106 93 Total derivatives not designated as hedging instruments $ 77,406 $ 392 $ 415 $ 70,146 $ 553 $ 578 Total derivatives $ 87,686 $ 414 $ 605 $ 81,403 $ 579 $ 887 _________ (1) Derivatives in a gain position are recorded as other assets and derivatives in a loss position are recorded as other liabilities on the consolidated balance sheets.
Schedule Of Effect Of Hedging Derivative Instruments On Statements Of Operations	The following tables present the effect of hedging derivative instruments on the consolidated statements of income: Gain or (Loss) Recognized in Income on Derivatives Location of Amounts Recognized in Income on Derivatives and Related Hedged Item Gain or (Loss) Recognized in Income on Related Hedged Item Three Months Ended September 30 Three Months Ended 2017 2016 2017 2016 (In millions) (In millions) Fair Value Hedges: Interest rate swaps on: Debt/CDs $ 1 $ 2 Interest expense $ — $ — Debt/CDs (6 ) (23 ) Other non-interest expense 6 24 Securities available for sale (1 ) (2 ) Interest income — — Securities available for sale — 2 Other non-interest expense — (5 ) Total $ (6 ) $ (21 ) $ 6 $ 19 Effective Portion (3) Gain or (Loss) Recognized in AOCI (1) Location of Amounts Reclassified from AOCI into Income Gain or (Loss) Reclassified from AOCI into Income (2) Three Months Ended September 30 Three Months Ended September 30 2017 2016 2017 2016 (In millions) (In millions) Cash Flow Hedges: Interest rate swaps $ (4 ) $ (40 ) Interest income on loans $ 17 $ 35 Total $ (4 ) $ (40 ) $ 17 $ 35 Gain or (Loss) Recognized in Income on Derivatives Location of Amounts Recognized in Income on Derivatives and Related Hedged Item Gain or (Loss) Recognized in Income on Related Hedged Item Nine Months Ended Nine Months Ended 2017 2016 2017 2016 (In millions) (In millions) Fair Value Hedges: Interest rate swaps on: Debt/CDs $ 2 $ 10 Interest expense $ — $ (2 ) Debt/CDs (1 ) 4 Other non-interest expense 2 (3 ) Securities available for sale (3 ) (7 ) Interest income — — Securities available for sale (2 ) (36 ) Other non-interest expense 1 32 Total $ (4 ) $ (29 ) $ 3 $ 27 Effective Portion (3) Gain or (Loss) Recognized in AOCI (1) Location of Amounts Reclassified from AOCI into Income Gain or (Loss) Reclassified from AOCI into Income (2) Nine Months Ended September 30 Nine Months Ended September 30 2017 2016 2017 2016 (In millions) (In millions) Cash Flow Hedges: Interest rate swaps $ (4 ) $ 163 Interest income on loans $ 70 $ 109 Total $ (4 ) $ 163 $ 70 $ 109 ______ (1) After-tax (2) Pre-tax (3) All cash flow hedges were highly effective for all periods presented, and the change in fair value attributed to hedge ineffectiveness was not material.
Schedule of Gains (Losses) Recognized Related to Derivatives Not Designated as Hedging Instruments	The following table presents the location and amount of gain or (loss) recognized in income on derivatives not designated as hedging instruments in the consolidated statements of income for the three and nine months ended September 30, 2017 and 2016 : Three Months Ended September 30 Nine Months Ended September 30 Derivatives Not Designated as Hedging Instruments 2017 2016 2017 2016 (In millions) Capital markets fee income and other (1) : Interest rate swaps $ 3 $ 4 $ 9 $ 7 Interest rate options 9 2 19 16 Interest rate futures and forward commitments 1 1 6 4 Other contracts 9 (11 ) (6 ) (9 ) Total capital markets fee income and other 22 (4 ) 28 18 Mortgage income: Interest rate swaps 1 (3 ) 7 45 Interest rate options (2 ) (1 ) (3 ) 7 Interest rate futures and forward commitments 2 8 (5 ) 9 Total mortgage income 1 4 (1 ) 61 $ 23 $ — $ 27 $ 79 ______ (1) Capital markets fee income and other is included in Other income on the consolidated statements of income.
Schedule Of Gross Derivative Positions, Including Collateral Posted or Received	The following table presents the Company's gross derivative positions, including collateral posted or received, as of September 30, 2017 and December 31, 2016 . Offsetting Derivative Assets Offsetting Derivative Liabilities September 30, 2017 December 31, 2016 September 30, 2017 December 31, 2016 (In millions) Gross amounts subject to offsetting $ 259 $ 414 $ 347 $ 583 Gross amounts not subject to offsetting 155 165 258 304 Gross amounts recognized 414 579 605 887 Gross amounts offset in the consolidated balance sheets (1) 158 241 265 541 Net amounts presented in the consolidated balance sheets 256 338 340 346 Gross amounts not offset in the consolidated balance sheets: Financial instruments 3 4 50 50 Cash collateral received/posted — — 250 227 Net amounts $ 253 $ 334 $ 40 $ 69 ________ (1) At September 30, 2017 , gross amounts of derivative assets and liabilities offset in the consolidated balance sheets presented above include cash collateral received of $40 million and cash collateral posted of $148 million . At December 31, 2016 , gross amounts of derivative assets and liabilities offset in the consolidated balance sheets presented above include cash collateral received of $48 million and cash collateral posted of $349 million .

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2017
Fair Value Disclosures [Abstract]
Schedule Of Assets And Liabilities At Fair Value Measured On A Recurring Basis And Non-Recurring Basis	The following table presents assets and liabilities measured at estimated fair value on a recurring basis and non-recurring basis as of September 30, 2017 and December 31, 2016 : September 30, 2017 December 31, 2016 Level 1 Level 2 Level 3 Total Estimated Fair Value Level 1 Level 2 Level 3 Total Estimated Fair Value (In millions) Recurring fair value measurements Trading account securities $ 193 $ — $ — $ 193 $ 124 $ — $ — $ 124 Securities available for sale: U.S. Treasury securities $ 308 $ — $ — $ 308 $ 303 $ — $ — $ 303 Federal agency securities — 24 — 24 — 35 — 35 Obligations of states and political subdivisions — — — — — 1 — 1 Mortgage-backed securities (MBS): Residential agency — 17,484 — 17,484 — 17,371 — 17,371 Residential non-agency — — 3 3 — — 4 4 Commercial agency — 3,626 — 3,626 — 3,463 — 3,463 Commercial non-agency — 809 — 809 — 1,129 — 1,129 Corporate and other debt securities — 1,198 4 1,202 — 1,271 3 1,274 Equity securities 203 — — 203 201 — — 201 Total securities available for sale $ 511 $ 23,141 $ 7 $ 23,659 $ 504 $ 23,270 $ 7 $ 23,781 Loans held for sale $ — $ 307 $ — $ 307 $ — $ 414 $ 33 $ 447 Residential mortgage servicing rights $ — $ — $ 335 $ 335 $ — $ — $ 324 $ 324 Derivative assets: Interest rate swaps $ — $ 337 $ — $ 337 $ — $ 438 $ — $ 438 Interest rate options — 10 10 20 — 13 11 24 Interest rate futures and forward commitments — 4 — 4 — 11 — 11 Other contracts 2 51 — 53 2 104 — 106 Total derivative assets $ 2 $ 402 $ 10 $ 414 $ 2 $ 566 $ 11 $ 579 Derivative liabilities: Interest rate swaps $ — $ 542 $ — $ 542 $ — $ 776 $ — $ 776 Interest rate options — 10 — 10 — 12 — 12 Interest rate futures and forward commitments — 7 — 7 — 6 — 6 Other contracts 2 44 — 46 1 92 — 93 Total derivative liabilities $ 2 $ 603 $ — $ 605 $ 1 $ 886 $ — $ 887 Non-recurring fair value measurements Loans held for sale $ — $ — $ 5 $ 5 $ — $ — $ 7 $ 7 Foreclosed property and other real estate — 32 6 38 — 29 6 35
Rollforward For Assets And Liabilities Measured At Fair Value On A Recurring Basis With Level 3 Significant Unobservable Inputs	The following tables illustrate rollforwards for all assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) for the three and nine months ended September 30, 2017 and 2016 . The tables do not reflect the change in fair value attributable to any related economic hedges the Company used to mitigate the interest rate risk associated with these assets and liabilities. The net changes in realized gains (losses) included in earnings related to Level 3 assets and liabilities held at September 30, 2017 and 2016 are not material. Three Months Ended September 30, 2017 Opening Total Realized / Unrealized Gains or Losses Purchases Sales Issuances Settlements Transfers Transfers Closing Included in Earnings Included in Other Compre- hensive Income (Loss) (In millions) Level 3 Instruments Only Securities available for sale: Residential non-agency MBS $ 3 — — — — — — — — $ 3 Corporate and other debt securities 4 — — — — — — — — 4 Total securities available for sale $ 7 — — — — — — — — $ 7 Commercial mortgage loans held for sale $ — — — — — — — — — $ — Residential mortgage servicing rights $ 346 (21 ) (1) — 10 — — — — — $ 335 Total derivatives, net $ 13 31 (2) — — — — (34 ) — — $ 10 Three Months Ended September 30, 2016 Opening Total Realized / Purchases Sales Issuances Settlements Transfers Transfers Closing Included Included (In millions) Level 3 Instruments Only Securities available for sale: Residential non-agency MBS $ 5 — — — — — — — — $ 5 Corporate and other debt securities 3 — — — — — — — — 3 Total securities available for sale $ 8 — — — — — — — — $ 8 Commercial mortgage loans held for sale $ 30 — — — — 60 — — — $ 90 Residential mortgage servicing rights $ 216 (12 ) (1) — 34 — — — — — $ 238 Total derivatives, net $ 17 32 (4) — — — — (33 ) — — $ 16 Nine Months Ended September 30, 2017 Opening Total Realized / Unrealized Gains or Losses Purchases Sales Issuances Settlements Transfers Transfers Closing Included in Earnings Included in Other Compre- hensive Income (Loss) (In millions) Level 3 Instruments Only Securities available for sale: Residential non-agency MBS $ 4 — — — — — (1 ) — — $ 3 Corporate and other debt securities 3 — — — — — — 1 — 4 Total securities available for sale $ 7 — — — — — (1 ) 1 — $ 7 Commercial mortgage loans held for sale $ 33 — — 7 (40 ) — — — — $ — Residential mortgage servicing rights $ 324 (45 ) (1) — 56 — — — — — $ 335 Total derivatives, net $ 11 87 (5) — — — — (88 ) — — $ 10 Nine Months Ended September 30, 2016 Opening Total Realized / Unrealized Gains or Losses Purchases Sales Issuances Settlements Transfers into Level 3 Transfers out of Level 3 Closing Included in Earnings Included in Other Compre- hensive Income (Loss) (In millions) Level 3 Instruments Only Trading account securities $ 33 (2 ) (3) — — (31 ) — — — — $ — Securities available for sale: Residential non-agency MBS $ 5 — — — — — — — — $ 5 Corporate and other debt securities 3 — — — — — — — — 3 Total securities available for sale $ 8 — — — — — — — — $ 8 Commercial mortgage loans held for sale $ — — — — — 90 — — — $ 90 Residential mortgage servicing rights $ 252 (87 ) (1) — 73 — — — — — $ 238 Total derivatives, net $ 10 105 (6) — — — — (99 ) — — $ 16 _________ (1) Included in mortgage income. (2) Approximately $8 million was included in capital markets fee income and other and $23 million was included in mortgage income. (3) Included in capitals markets fee income and other. (4) Approximately $3 million was included in capital markets fee income and other and $29 million was included in mortgage income. (5) Approximately $18 million was included in capital markets fee income and other and $69 million was included in mortgage income. (6) Approximately $16 million was included in capital markets fee income and other and $89 million was included in mortgage income.
Schedule Of Fair Value Adjustments Related To Non-Recurring Fair Value Measurements	The following table presents the fair value adjustments related to non-recurring fair value measurements: Three Months Ended September 30 Nine Months Ended September 30 2017 2016 2017 2016 (In millions) Loans held for sale $ (1 ) $ (3 ) $ (8 ) $ (25 ) Foreclosed property and other real estate (6 ) (8 ) (21 ) (35 )
Summary Of Quantitative Information About Level 3 Measurements	The following tables present detailed information regarding assets and liabilities measured at fair value using significant unobservable inputs (Level 3) as of September 30, 2017 , and December 31, 2016 . The tables include the valuation techniques and the significant unobservable inputs utilized. The range of each significant unobservable input as well as the weighted-average within the range utilized at September 30, 2017 , and December 31, 2016 , are included. Following the tables are descriptions of the valuation techniques and the sensitivity of the techniques to changes in the significant unobservable inputs. September 30, 2017 Level 3 Valuation Technique Unobservable Input(s) Quantitative Range of Unobservable Inputs and (Weighted-Average) (Dollars in millions) Recurring fair value measurements: Securities available for sale: Residential non-agency MBS $3 Discounted cash flow Spread to LIBOR 5.4% - 69.9% (22.9%) Weighted-average CPR (%) 3.8% - 29.3% (11.4%) Probability of default 1.3% Loss severity 88.0% Corporate and other debt securities $4 Market comparable Evaluated quote on same issuer/comparable bond 99.7% Residential mortgage servicing rights (1) $335 Discounted cash flow Weighted-average CPR (%) 8.1% - 26.5% (10.0%) OAS (%) 8.1% - 15.0% (8.6%) Derivative assets: Interest rate options $8 Interest rate lock commitments on the residential mortgage loans are valued using discounted cash flows Weighted-average CPR (%) 8.1% - 26.5% (10.0%) OAS (%) 8.1% - 15.0% (8.6%) Pull-through 8.6% - 99.0% (79.9%) $2 Interest rate lock commitments on the commercial mortgage loans are valued using discounted cash flows Internal rate of return 12.0% - 17.0% (12.0%) Nonrecurring fair value measurements: Loans held for sale $5 Commercial loans held for sale are valued based on multiple data points, including discount to appraised value of collateral based on recent market activity for sales of similar loans Appraisal comparability adjustment (discount) 28.3% - 72.7% (54.7%) Foreclosed property and other real estate $5 Property in foreclosure is valued by discount to appraised value of property based on recent market activity for sales of similar properties Appraisal comparability adjustment (discount) 25.0% - 35.0% (26.0%) $1 Bank owned property valuations are based on comparable sales and local broker network estimates provided by a third-party real estate services provider Estimated third-party valuations utilizing available sales data for similar transactions (discount) 3.4% _________ (1) See Note 5 for additional disclosures related to assumptions used in the fair value calculation for residential mortgage servicing rights. December 31, 2016 Level 3 Valuation Technique Unobservable Input(s) Quantitative Range of Unobservable Inputs and (Weighted-Average) (Dollars in millions) Recurring fair value measurements: Securities available for sale: Residential non-agency MBS $4 Discounted cash flow Spread to LIBOR 5.5% - 70.0% (23.0%) Weighted-average CPR (%) 3.5% - 29.5% (12.2%) Probability of default 3.1% Loss severity 63.6% Corporate and other debt securities $3 Market comparable Evaluated quote on same issuer/comparable bond 100.3% Commercial mortgage loans held for sale $33 Market comparable Credit spreads for bonds in the commercial MBS 0.4% - 5.8% (1.3%) Residential mortgage servicing rights (1) $324 Discounted cash flow Weighted-average CPR (%) 5.7% - 24.3% (7.6%) OAS (%) 8.2% - 13.6% (10.5%) Derivative assets: Interest rate options $8 Interest rate lock commitments on the residential mortgage loans are valued using discounted cash flows Weighted-average CPR (%) 5.7% - 24.3% (7.6%) OAS (%) 8.2% - 13.6% (10.5%) Pull-through 14.9% - 99.4% (78.3%) $3 Interest rate lock commitments on the commercial mortgage loans are valued using discounted cash flows Internal rate of return 7.0% - 17.0% (12.0%) Nonrecurring fair value measurements: Loans held for sale $7 Commercial loans held for sale are valued based on multiple data points, including discount to appraised value of collateral based on recent market activity for sales of similar loans Appraisal comparability adjustment (discount) 26.2% - 69.4% (48.1%) Foreclosed property and other real estate $1 Property in foreclosure is valued by discount to appraised value of property based on recent market activity for sales of similar properties Appraisal comparability adjustment (discount) 25.0% - 60.3% (37.0%) $5 Bank owned property valuations are based on comparable sales and local broker network estimates provided by a third-party real estate services provider Estimated third-party valuations utilizing available sales data for similar transactions (discount) 5.9% - 29.6% (15.8%) _________ (1) See Note 7 to the consolidated financial statements of the Annual Report on Form 10-K for the year ended December 31, 2016 for additional disclosures related to assumptions used in the fair value calculation for residential mortgage servicing rights.
Fair Value Option, Fair Value and Unpaid Principal Balance	The following table summarizes the difference between the aggregate fair value and the aggregate unpaid principal balance for mortgage loans held for sale measured at fair value: September 30, 2017 December 31, 2016 Aggregate Fair Value Aggregate Unpaid Principal Aggregate Fair Value Less Aggregate Unpaid Principal Aggregate Fair Value Aggregate Unpaid Principal Aggregate Fair Value Less Aggregate Unpaid Principal (In millions) Mortgage loans held for sale, at fair value $ 307 $ 296 $ 11 $ 447 $ 443 $ 4 Interest income on mortgage loans held for sale is recognized based on contractual rates and is reflected in interest income on loans held for sale in the consolidated statements of income. The following table details net gains and losses resulting from changes in fair value of these loans, which were recorded in mortgage and capital markets income in the consolidated statements of income during the three and nine months ended September 30, 2017 and 2016 . These changes in fair value are mostly offset by economic hedging activities. An immaterial portion of these amounts was attributable to changes in instrument-specific credit risk. Net gains (losses) resulting from changes in fair value Three Months Ended September 30 Nine Months Ended September 30 2017 2016 2017 2016 (In millions) Mortgage loans held for sale, at fair value $ (3 ) $ — $ 5 $ 9
Schedule Of Carrying Amounts And Estimated Fair Values Of Financial Instruments	The carrying amounts and estimated fair values, as well as the level within the fair value hierarchy, of the Company’s financial instruments as of September 30, 2017 are as follows: September 30, 2017 Carrying Amount Estimated Fair Value (1) Level 1 Level 2 Level 3 (In millions) Financial assets: Cash and cash equivalents $ 3,761 $ 3,761 $ 3,761 $ — $ — Trading account securities 193 193 193 — — Securities held to maturity 1,703 1,720 — 1,720 — Securities available for sale 23,659 23,659 511 23,141 7 Loans held for sale 388 388 — 388 — Loans (excluding leases), net of unearned income and allowance for loan losses (2)(3) 77,351 74,002 — — 74,002 Other earning assets (4) 891 891 — 891 — Derivative assets 414 414 2 402 10 Financial liabilities: Derivative liabilities 605 605 2 603 — Deposits 97,591 97,630 — 97,630 — Short-term borrowings 600 600 — 600 — Long-term borrowings 6,102 6,447 — 4,878 1,569 Loan commitments and letters of credit 85 420 — — 420 Indemnification obligation 23 22 — — 22 _________ (1) Estimated fair values are consistent with an exit price concept. The assumptions used to estimate the fair values are intended to approximate those that a market participant would use in a hypothetical orderly transaction. In estimating fair value, the Company maintains a corporate governance program to make adjustments for estimated changes in interest rates, market liquidity and credit spreads in the periods they are deemed to have occurred. Historically, the Company has utilized the results of a third-party vendor model to support its primary valuation approach for loans. The Company is currently finalizing the development of an internally-supported loan valuation model which management expects to implement by March 31, 2018. (2) The estimated fair value of portfolio loans assumes sale of the loans to a third-party financial investor. Accordingly, the value to the Company if the loans were held to maturity is not reflected in the fair value estimate. In the current whole loan market, financial investors are generally requiring a higher rate of return than the return inherent in loans if held to maturity. The fair value discount at September 30, 2017 was $3.3 billion or 4.3 percent. (3) Excluded from this table is the capital lease carrying amount of $964 million at September 30, 2017 . (4) Excluded from this table is the operating lease carrying amount of $ 530 million at September 30, 2017 . The carrying amounts and estimated fair values, as well as the level within the fair value hierarchy, of the Company's financial instruments as of December 31, 2016 are as follows: December 31, 2016 Carrying Amount Estimated Fair Value (1) Level 1 Level 2 Level 3 (In millions) Financial assets: Cash and cash equivalents $ 5,451 $ 5,451 $ 5,451 $ — $ — Trading account securities 124 124 124 — — Securities held to maturity 1,362 1,369 — 1,369 — Securities available for sale 23,781 23,781 504 23,270 7 Loans held for sale 718 722 — 689 33 Loans (excluding leases), net of unearned income and allowance for loan losses (2)(3) 78,128 74,063 — — 74,063 Other earning assets (4) 956 956 — 956 — Derivative assets 579 579 2 566 11 Financial liabilities: Derivative liabilities 887 887 1 886 — Deposits 99,035 99,081 — 99,081 — Long-term borrowings 7,763 8,008 — 5,408 2,600 Loan commitments and letters of credit 102 484 — — 484 Indemnification obligation 28 26 — — 26 _________ (1) Estimated fair values are consistent with an exit price concept. The assumptions used to estimate the fair values are intended to approximate those that a market participant would use in a hypothetical orderly transaction. In estimating fair value, the Company maintains a corporate governance program to make adjustments for estimated changes in interest rates, market liquidity and credit spreads in the periods they are deemed to have occurred. Historically, the Company has utilized the results of a third-party vendor model to support its primary valuation approach for loans. The Company is currently finalizing the development of an internally-supported loan valuation model which management expects to implement by March 31, 2018. (2) The estimated fair value of portfolio loans assumes sale of the loans to a third-party financial investor. Accordingly, the value to the Company if the loans were held to maturity is not reflected in the fair value estimate. In the current whole loan market, financial investors are generally requiring a higher rate of return than the return inherent in loans if held to maturity. The fair value discount at December 31, 2016 was $4.1 billion or 5.2 percent. (3) Excluded from this table is the capital lease carrying amount of $876 million at December 31, 2016 . (4) Excluded from this table is the operating lease carrying amount of $688 million at December 31, 2016 .

Business Segment Information (T

Business Segment Information (Tables)	9 Months Ended
	Sep. 30, 2017
Segment Reporting [Abstract]
Schedule Of Financial Information By Reportable Segment	The following tables present financial information for each reportable segment for the period indicated. Three Months Ended September 30, 2017 Corporate Bank Consumer Bank Wealth Management Other Continuing Operations Discontinued Operations Consolidated (In millions) Net interest income and other financing income (loss) $ 362 $ 542 $ 50 $ (56 ) $ 898 $ — $ 898 Provision (credit) for loan losses 66 75 5 (70 ) 76 — 76 Non-interest income 112 275 110 18 515 — 515 Non-interest expense 214 511 117 44 886 1 887 Income (loss) before income taxes 194 231 38 (12 ) 451 (1 ) 450 Income tax expense (benefit) 74 88 15 (38 ) 139 — 139 Net income (loss) $ 120 $ 143 $ 23 $ 26 $ 312 $ (1 ) $ 311 Average assets $ 51,304 $ 34,988 $ 3,093 $ 34,048 $ 123,433 $ — $ 123,433 Three Months Ended September 30, 2016 Corporate Bank Consumer Bank Wealth Management Other Continuing Operations Discontinued Operations Consolidated (In millions) Net interest income and other financing income (loss) $ 352 $ 516 $ 43 $ (76 ) $ 835 $ — $ 835 Provision (credit) for loan losses 72 74 5 (122 ) 29 — 29 Non-interest income 130 291 107 71 599 — 599 Non-interest expense 225 530 120 59 934 (2 ) 932 Income (loss) before income taxes 185 203 25 58 471 2 473 Income tax expense (benefit) 70 77 10 (5 ) 152 1 153 Net income (loss) $ 115 $ 126 $ 15 $ 63 $ 319 $ 1 $ 320 Average assets $ 53,798 $ 34,843 $ 3,233 $ 33,955 $ 125,829 $ — $ 125,829 Nine Months Ended September 30, 2017 Corporate Bank Consumer Bank Wealth Management Other Continuing Operations Discontinued Operations Consolidated (In millions) Net interest income and other financing income (loss) $ 1,062 $ 1,593 $ 143 $ (159 ) $ 2,639 $ — $ 2,639 Provision (credit) for loan losses 199 220 16 (241 ) 194 — 194 Non-interest income 343 836 331 40 1,550 — 1,550 Non-interest expense 649 1,541 358 124 2,672 (9 ) 2,663 Income (loss) before income taxes 557 668 100 (2 ) 1,323 9 1,332 Income tax expense (benefit) 212 254 38 (104 ) 400 4 404 Net income (loss) $ 345 $ 414 $ 62 $ 102 $ 923 $ 5 $ 928 Average assets $ 51,896 $ 34,982 $ 3,130 $ 34,016 $ 124,024 $ — $ 124,024 Nine Months Ended September 30, 2016 Corporate Bank Consumer Bank Wealth Management Other Continuing Operations Discontinued Operations Consolidated (In millions) Net interest income and other financing income (loss) $ 1,088 $ 1,531 $ 131 $ (205 ) $ 2,545 $ — $ 2,545 Provision (credit) for loan losses 216 215 17 (234 ) 214 — 214 Non-interest income 380 831 321 99 1,631 — 1,631 Non-interest expense 662 1,544 351 161 2,718 (7 ) 2,711 Income (loss) before income taxes 590 603 84 (33 ) 1,244 7 1,251 Income tax expense (benefit) 224 229 32 (105 ) 380 3 383 Net income (loss) $ 366 $ 374 $ 52 $ 72 $ 864 $ 4 $ 868 Average assets $ 54,420 $ 34,373 $ 3,235 $ 33,706 $ 125,734 $ — $ 125,734

Commitments, Contingencies an37

Commitments, Contingencies and Guarantees (Tables)	9 Months Ended
	Sep. 30, 2017
Commitments and Contingencies Disclosure [Abstract]
Credit Risk Of Financial Instruments By Contractual Amounts	Credit risk associated with these instruments is represented by the contractual amounts indicated in the following table: September 30, 2017 December 31, 2016 (In millions) Unused commitments to extend credit $ 45,378 $ 44,408 Standby letters of credit 1,356 1,425 Commercial letters of credit 63 46 Liabilities associated with standby letters of credit 25 34 Assets associated with standby letters of credit 26 34 Reserve for unfunded credit commitments 59 69

Discontinued Operations (Schedu

Discontinued Operations (Schedule of Discontinued Operations Income Statement) (Details) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Non-interest expense:
Other		$ 228	$ 281	$ 703	$ 781
Total non-interest expense		886	934	2,672	2,718
Income (loss) from discontinued operations before income taxes		(1)	2	9	7
Income tax expense (benefit)		0	1	4	3
Income (loss) from discontinued operations, net of tax		$ (1)	$ 1	$ 5	$ 4
Earnings (loss) per common share from discontinued operations:
Basic (in dollars per share)	[1]	$ 0	$ 0	$ 0	$ 0
Diluted (in dollars per share)	[1]	$ 0	$ 0	$ 0	$ 0
Discontinued Operations [Member]
Non-interest expense:
Professional and legal expenses/(recoveries)		$ 1	$ (2)	$ (10)	$ (8)
Other		0	0	1	1
Total non-interest expense		1	(2)	(9)	(7)
Income (loss) from discontinued operations before income taxes		(1)	2	9	7
Income tax expense (benefit)		0	1	4	3
Income (loss) from discontinued operations, net of tax		$ (1)	$ 1	$ 5	$ 4
Earnings (loss) per common share from discontinued operations:
Basic (in dollars per share)		$ 0	$ 0	$ 0	$ 0
Diluted (in dollars per share)		$ 0	$ 0	$ 0	$ 0
[1]	Certain per share amounts may not appear to reconcile due to rounding.

Securities (Schedule Of Amortiz

Securities (Schedule Of Amortized Cost, Gross Unrealized Gains And Losses, And Estimated Fair Value Of Securities Available For Sale And Securities Held To Maturity) (Details) - USD ($) $ in Millions		Sep. 30, 2017	Dec. 31, 2016
Schedule of Held-to-maturity Securities [Line Items]
Securities held to maturity, amortized cost		$ 1,749	$ 1,416
Held To Maturity Securities Gross Unrealized Gains	[1]	0	0
Held To Maturity Securities Gross Unrealized Losses	[1]	(46)	(54)
Securities held to maturity		1,703	1,362
Held-to-maturity Securities, Accumulated Unrecognized Holding Gain		22	12
Held-to-maturity Securities, Accumulated Unrecognized Holding Loss		(5)	(5)
Securities held to maturity, estimated fair value		1,720	1,369
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis		23,712	23,950
Available-for-Sale Securities, Accumulated Gross Unrealized Gain, before Tax		149	139
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax		(202)	(308)
Available-for-sale securities, net carrying value		23,659	23,781
Securities available for sale		23,659	23,781
US Treasury Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis		307	303
Available-for-Sale Securities, Accumulated Gross Unrealized Gain, before Tax		1	1
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax		0	(1)
Available-for-sale securities, net carrying value		308	303
Securities available for sale		308	303
Federal Agency Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis		24	35
Available-for-Sale Securities, Accumulated Gross Unrealized Gain, before Tax		0	0
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax		0	0
Available-for-sale securities, net carrying value		24	35
Securities available for sale		24	35
Obligations of States and Political Subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis			1
Available-for-Sale Securities, Accumulated Gross Unrealized Gain, before Tax			0
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax			0
Available-for-sale securities, net carrying value			1
Securities available for sale			1
Residential Agency [Member]
Schedule of Held-to-maturity Securities [Line Items]
Securities held to maturity, amortized cost		1,096
Securities held to maturity, estimated fair value		1,067
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis		17,573	17,531
Available-for-Sale Securities, Accumulated Gross Unrealized Gain, before Tax		89	95
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax		(178)	(255)
Available-for-sale securities, net carrying value		17,484	17,371
Securities available for sale		17,484	17,371
Residential Non-Agency [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis		3	4
Available-for-Sale Securities, Accumulated Gross Unrealized Gain, before Tax		0	0
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax		0	0
Available-for-sale securities, net carrying value		3	4
Securities available for sale		3	4
Commercial Agency [Member]
Schedule of Held-to-maturity Securities [Line Items]
Securities held to maturity, amortized cost		653
Securities held to maturity, estimated fair value		653
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis		3,630	3,486
Available-for-Sale Securities, Accumulated Gross Unrealized Gain, before Tax		14	9
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax		(18)	(32)
Available-for-sale securities, net carrying value		3,626	3,463
Securities available for sale		3,626	3,463
Commercial Non-Agency [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis		803	1,124
Available-for-Sale Securities, Accumulated Gross Unrealized Gain, before Tax		7	8
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax		(1)	(3)
Available-for-sale securities, net carrying value		809	1,129
Securities available for sale		809	1,129
Corporate and other debt securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis		1,179	1,272
Available-for-Sale Securities, Accumulated Gross Unrealized Gain, before Tax		28	19
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax		(5)	(17)
Available-for-sale securities, net carrying value		1,202	1,274
Securities available for sale		1,202	1,274
Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis		193	194
Available-for-Sale Securities, Accumulated Gross Unrealized Gain, before Tax		10	7
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax		0	0
Available-for-sale securities, net carrying value		203	201
Securities available for sale		203	201
Residential Agency [Member]
Schedule of Held-to-maturity Securities [Line Items]
Securities held to maturity, amortized cost		1,096	1,249
Held To Maturity Securities Gross Unrealized Gains	[1]	0	0
Held To Maturity Securities Gross Unrealized Losses	[1]	(42)	(49)
Securities held to maturity		1,054	1,200
Held-to-maturity Securities, Accumulated Unrecognized Holding Gain		16	12
Held-to-maturity Securities, Accumulated Unrecognized Holding Loss		(3)	(3)
Securities held to maturity, estimated fair value		1,067	1,209
Commercial Agency [Member]
Schedule of Held-to-maturity Securities [Line Items]
Securities held to maturity, amortized cost		653	167
Held To Maturity Securities Gross Unrealized Gains	[1]	0	0
Held To Maturity Securities Gross Unrealized Losses	[1]	(4)	(5)
Securities held to maturity		649	162
Held-to-maturity Securities, Accumulated Unrecognized Holding Gain		6	0
Held-to-maturity Securities, Accumulated Unrecognized Holding Loss		(2)	(2)
Securities held to maturity, estimated fair value		$ 653	$ 160
[1]	The gross unrealized losses recognized in OCI on securities held to maturity resulted from a transfer of securities available for sale to held to maturity in the second quarter of 2013.

Securities (Schedule Of Cost An

Securities (Schedule Of Cost And Estimated Fair Value Of Securities Available For Sale And Securities Held To Maturity By Contractual Maturity) (Details) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Securities held to maturity, amortized cost	$ 1,749	$ 1,416
Securities held to maturity, estimated fair value	1,720	1,369
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Amortized Cost Basis	37
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value	37
Available-for-sale Securities, Debt Maturities, Year Two Through Five, Amortized Cost Basis	761
Available-for-sale Securities, Debt Maturities, Year Two Through Five, Fair Value	771
Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Amortized Cost Basis	570
Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Fair Value	581
Available-for-sale Securities, Debt Maturities, after Ten Years, Amortized Cost Basis	142
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value	145
Available-for-sale Securities, Amortized Cost Basis	23,712	23,950
Securities available for sale	23,659	23,781
Residential Agency [Member]
Securities held to maturity, amortized cost	1,096
Securities held to maturity, estimated fair value	1,067
Available-for-sale Securities, Amortized Cost Basis	17,573	17,531
Securities available for sale	17,484	17,371
Residential Non-Agency [Member]
Available-for-sale Securities, Amortized Cost Basis	3	4
Securities available for sale	3	4
Commercial Agency [Member]
Securities held to maturity, amortized cost	653
Securities held to maturity, estimated fair value	653
Available-for-sale Securities, Amortized Cost Basis	3,630	3,486
Securities available for sale	3,626	3,463
Commercial Non-Agency [Member]
Available-for-sale Securities, Amortized Cost Basis	803	1,124
Securities available for sale	809	1,129
Equity Securities [Member]
Available-for-sale Securities, Amortized Cost Basis	193	194
Securities available for sale	$ 203	$ 201

Securities (Schedule Of Gross U

Securities (Schedule Of Gross Unrealized Losses And Estimated Fair Value Of Securities Available For Sale and Held to Maturity) (Details) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Unrealized Loss And Fair Value On Securities [Line Items]
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Estimated Fair Value	$ 752	$ 850
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(18)	(26)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Estimated Fair Value	468	519
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(17)	(21)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Estimated Fair Value	1,220	1,369
Held-to-maturity Securities, Continuous Unrealized Loss Position, Accumulated Loss	(35)	(47)
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Estimated Fair Value	11,969	15,166
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(156)	(285)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Estimated Fair Value	1,835	1,027
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(46)	(23)
Available-for-sale Securities, Continuous Unrealized Loss Position, Estimated Fair Value	13,804	16,193
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	(202)	(308)
US Treasury Securities [Member]
Unrealized Loss And Fair Value On Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Estimated Fair Value	80	112
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	0	(1)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Estimated Fair Value	18	18
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Estimated Fair Value	98	130
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	0	(1)
Residential Agency [Member]
Unrealized Loss And Fair Value On Securities [Line Items]
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Estimated Fair Value	752	850
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(18)	(26)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Estimated Fair Value	315	359
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(11)	(14)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Estimated Fair Value	1,067	1,209
Held-to-maturity Securities, Continuous Unrealized Loss Position, Accumulated Loss	(29)	(40)
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Estimated Fair Value	10,060	12,071
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(139)	(245)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Estimated Fair Value	1,519	570
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(39)	(10)
Available-for-sale Securities, Continuous Unrealized Loss Position, Estimated Fair Value	11,579	12,641
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	(178)	(255)
Commercial Agency [Member]
Unrealized Loss And Fair Value On Securities [Line Items]
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Estimated Fair Value	0	0
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	0	0
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Estimated Fair Value	153	160
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(6)	(7)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Estimated Fair Value	153	160
Held-to-maturity Securities, Continuous Unrealized Loss Position, Accumulated Loss	(6)	(7)
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Estimated Fair Value	1,490	2,199
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(15)	(31)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Estimated Fair Value	164	45
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(3)	(1)
Available-for-sale Securities, Continuous Unrealized Loss Position, Estimated Fair Value	1,654	2,244
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	(18)	(32)
Commercial Non-Agency [Member]
Unrealized Loss And Fair Value On Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Estimated Fair Value	175	402
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(1)	(2)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Estimated Fair Value	30	176
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	(1)
Available-for-sale Securities, Continuous Unrealized Loss Position, Estimated Fair Value	205	578
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	(1)	(3)
All Other Securities [Member]
Unrealized Loss And Fair Value On Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Estimated Fair Value	164	382
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(1)	(6)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Estimated Fair Value	104	218
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(4)	(11)
Available-for-sale Securities, Continuous Unrealized Loss Position, Estimated Fair Value	268	600
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	$ (5)	$ (17)

Securities (Schedule Of Gross R

Securities (Schedule Of Gross Realized Gains And Gross Realized Losses On Available For Sale Securities) (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Investments, Debt and Equity Securities [Abstract]
Gross realized gains		$ 5	$ 1	$ 9	$ 30
Gross realized losses		0	(1)	(3)	(28)
OTTI		(1)	0	(1)	(1)
Securities available for sale gains (losses), net	[1]	$ 4	$ 0	$ 5	$ 1
[1]	The securities gains (losses), net balances above exclude net trading securities gains of $4 million recognized during the third quarter of 2017.

Securities (Narrative) (Details

Securities (Narrative) (Details) $ in Millions	3 Months Ended
	Sep. 30, 2017USD ($)security	Dec. 31, 2016USD ($)security
Schedule of Available-for-sale Securities [Line Items]
Trading Securities, Realized Gain (Loss)	$ 4
Securities pledged as collateral	$ 8,600	$ 11,600
Number of individual positions in unrealized loss position | security	1,392	1,613
US Treasury Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities pledged as collateral	$ 50	$ 50

Loans and the Allowance for C44

Loans and the Allowance for Credit Losses (Schedule Of Loan Portfolio, Net Of Unearned Income) (Details) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	$ 79,356	$ 80,095	$ 80,883
Commercial And Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	35,443	35,012
Commercial Real Estate Mortgage - Owner-Occupied [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	6,284	6,867
Commercial Real Estate Construction - Owner-Occupied [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	335	334
Commercial Investor Real Estate Mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	3,999	4,087
Commercial Investor Real Estate Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	1,936	2,387
Residential First Mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	13,903	13,440
Home Equity [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	10,276	10,687
Indirect-vehicles [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	3,489	4,040
Indirect-other consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	1,318	920
Consumer Credit Card Financing Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	1,214	1,196
Other consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	1,159	1,125
Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	42,062	42,213	42,744
Total Investor Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	5,935	6,474	6,764
Consumer Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, net of unearned income	$ 31,359	$ 31,408	$ 31,375

Loans and the Allowance for C45

Loans and the Allowance for Credit Losses (Analysis of the Allowance for Credit Losses by Portfolio Segment) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Allowance for Loan and Lease Losses [Roll Forward]
Allowance for loan losses, beginning of period	$ 1,041	$ 1,151	$ 1,091	$ 1,106
Provision (credit) for loan and lease losses	76	29	194	214
Loan losses:
Charge-offs	(106)	(94)	(329)	(288)
Recoveries	30	40	85	94
Net loan losses	(76)	(54)	(244)	(194)
Total allowance for loan losses	1,041	1,126	1,041	1,126
Reserve For Unfunded Credit Commitments [Roll Forward]
Reserve For Unfunded Credit Commitments, beginning of period	67	64	69	52
Provision (credit) for unfunded credit losses	(8)	8	(10)	20
Reserve For Unfunded Credit Commitments, end of period	59	72	59	72
Allowance for Credit Losses, end of period	1,100	1,198	1,100	1,198
Portion of ending allowance for loan losses:
Allowance Individually Evaluated for Impairment	273	333	273	333
Allowance Collectively Evaluated for Impairment	768	793	768	793
Total allowance for loan losses	1,041	1,126	1,041	1,126
Portion of loan portfolio ending balance:
Loans Individually Evaluated for Impairment	1,733	2,044	1,733	2,044
Loans Collectively Evaluated for Impairment	77,623	78,839	77,623	78,839
Loans, net of unearned income	79,356	80,883	79,356	80,883	$ 80,095
Commercial Portfolio Segment [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Allowance for loan losses, beginning of period	707	825	753	758
Provision (credit) for loan and lease losses	8	(15)	41	108
Loan losses:
Charge-offs	(43)	(31)	(139)	(102)
Recoveries	11	19	28	34
Net loan losses	(32)	(12)	(111)	(68)
Total allowance for loan losses	683	798	683	798
Reserve For Unfunded Credit Commitments [Roll Forward]
Reserve For Unfunded Credit Commitments, beginning of period	63	59	64	47
Provision (credit) for unfunded credit losses	(8)	8	(9)	20
Reserve For Unfunded Credit Commitments, end of period	55	67	55	67
Allowance for Credit Losses, end of period	738	865	738	865
Portion of ending allowance for loan losses:
Allowance Individually Evaluated for Impairment	202	252	202	252
Allowance Collectively Evaluated for Impairment	481	546	481	546
Total allowance for loan losses	683	798	683	798
Portion of loan portfolio ending balance:
Loans Individually Evaluated for Impairment	898	1,119	898	1,119
Loans Collectively Evaluated for Impairment	41,164	41,625	41,164	41,625
Loans, net of unearned income	42,062	42,744	42,062	42,744	42,213
Total Investor Real Estate [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Allowance for loan losses, beginning of period	82	87	85	97
Provision (credit) for loan and lease losses	(8)	(7)	(16)	(21)
Loan losses:
Charge-offs	0	(1)	(2)	(2)
Recoveries	3	5	10	10
Net loan losses	3	4	8	8
Total allowance for loan losses	77	84	77	84
Reserve For Unfunded Credit Commitments [Roll Forward]
Reserve For Unfunded Credit Commitments, beginning of period	4	5	5	5
Provision (credit) for unfunded credit losses	0	0	(1)	0
Reserve For Unfunded Credit Commitments, end of period	4	5	4	5
Allowance for Credit Losses, end of period	81	89	81	89
Portion of ending allowance for loan losses:
Allowance Individually Evaluated for Impairment	19	19	19	19
Allowance Collectively Evaluated for Impairment	58	65	58	65
Total allowance for loan losses	77	84	77	84
Portion of loan portfolio ending balance:
Loans Individually Evaluated for Impairment	108	140	108	140
Loans Collectively Evaluated for Impairment	5,827	6,624	5,827	6,624
Loans, net of unearned income	5,935	6,764	5,935	6,764	6,474
Consumer Portfolio Segment [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Allowance for loan losses, beginning of period	252	239	253	251
Provision (credit) for loan and lease losses	76	51	169	127
Loan losses:
Charge-offs	(63)	(62)	(188)	(184)
Recoveries	16	16	47	50
Net loan losses	(47)	(46)	(141)	(134)
Total allowance for loan losses	281	244	281	244
Reserve For Unfunded Credit Commitments [Roll Forward]
Reserve For Unfunded Credit Commitments, beginning of period	0	0	0	0
Provision (credit) for unfunded credit losses	0	0	0	0
Reserve For Unfunded Credit Commitments, end of period	0	0	0	0
Allowance for Credit Losses, end of period	281	244	281	244
Portion of ending allowance for loan losses:
Allowance Individually Evaluated for Impairment	52	62	52	62
Allowance Collectively Evaluated for Impairment	229	182	229	182
Total allowance for loan losses	281	244	281	244
Portion of loan portfolio ending balance:
Loans Individually Evaluated for Impairment	727	785	727	785
Loans Collectively Evaluated for Impairment	30,632	30,590	30,632	30,590
Loans, net of unearned income	$ 31,359	$ 31,375	$ 31,359	$ 31,375	$ 31,408

Loans and the Allowance for C46

Loans and the Allowance for Credit Losses (Credit Quality Indicators) (Details) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2016
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income	$ 79,356	$ 80,095	$ 80,883
Commercial And Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income	35,443	35,012
Commercial Real Estate Mortgage - Owner-Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income	6,284	6,867
Commercial Real Estate Construction - Owner-Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income	335	334
Commercial Investor Real Estate Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income	3,999	4,087
Commercial Investor Real Estate Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income	1,936	2,387
Residential First Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income	13,903	13,440
Home Equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income	10,276	10,687
Indirect-vehicles [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income	3,489	4,040
Indirect-other consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income	1,318	920
Consumer Credit Card Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income	1,214	1,196
Other consumer
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income	1,159	1,125
Pass [Member] | Commercial And Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income	33,323	32,619
Pass [Member] | Commercial Real Estate Mortgage - Owner-Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income	5,780	6,190
Pass [Member] | Commercial Real Estate Construction - Owner-Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income	315	308
Pass [Member] | Commercial Investor Real Estate Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income	3,729	3,766
Pass [Member] | Commercial Investor Real Estate Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income	1,888	2,192
Special Mention [Member] | Commercial And Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income	627	658
Special Mention [Member] | Commercial Real Estate Mortgage - Owner-Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income	178	221
Special Mention [Member] | Commercial Real Estate Construction - Owner-Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income	6	8
Special Mention [Member] | Commercial Investor Real Estate Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income	128	190
Special Mention [Member] | Commercial Investor Real Estate Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income	2	129
Substandard [Member] | Commercial And Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income	1,000	1,112
Substandard [Member] | Commercial Real Estate Mortgage - Owner-Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income	186	246
Substandard [Member] | Commercial Real Estate Construction - Owner-Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income	8	15
Substandard [Member] | Commercial Investor Real Estate Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income	137	114
Substandard [Member] | Commercial Investor Real Estate Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income	46	66
Accrual [Member] | Residential First Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income	13,858	13,390
Accrual [Member] | Home Equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income	10,206	10,595
Accrual [Member] | Indirect-vehicles [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income	3,488	4,040
Accrual [Member] | Indirect-other consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income	1,318	920
Accrual [Member] | Consumer Credit Card Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income	1,214	1,196
Accrual [Member] | Other consumer
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income	1,159	1,125
Non Accrual [Member] | Commercial And Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income	493	623
Non Accrual [Member] | Commercial Real Estate Mortgage - Owner-Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income	140	210
Non Accrual [Member] | Commercial Real Estate Construction - Owner-Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income	6	3
Non Accrual [Member] | Commercial Investor Real Estate Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income	5	17
Non Accrual [Member] | Commercial Investor Real Estate Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income	0	0
Non Accrual [Member] | Residential First Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income	45	50
Non Accrual [Member] | Home Equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income	70	92
Non Accrual [Member] | Indirect-vehicles [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income	1	0
Non Accrual [Member] | Indirect-other consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income	0	0
Non Accrual [Member] | Consumer Credit Card Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income	0	0
Non Accrual [Member] | Other consumer
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income	0	0
Commercial Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income	42,062	42,213	42,744
Commercial Portfolio Segment [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income	39,418	39,117
Commercial Portfolio Segment [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income	811	887
Commercial Portfolio Segment [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income	1,194	1,373
Commercial Portfolio Segment [Member] | Non Accrual [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income	639	836
Total Investor Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income	5,935	6,474	6,764
Total Investor Real Estate [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income	5,617	5,958
Total Investor Real Estate [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income	130	319
Total Investor Real Estate [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income	183	180
Total Investor Real Estate [Member] | Non Accrual [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income	5	17
Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income	31,359	31,408	$ 31,375
Consumer Portfolio Segment [Member] | Accrual [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income	31,243	31,266
Consumer Portfolio Segment [Member] | Non Accrual [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of unearned income	$ 116	$ 142

Loans and the Allowance for C47

Loans and the Allowance for Credit Losses (Schedule of Aging Analysis Of Days Past Due (DPD) For Each Portfolio Class) (Details) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2016
Financing Receivable, Recorded Investment, Past Due [Line Items]
90 plus DPD, Accrual Loans	$ 245	$ 283
Total 30 plus DPD, Accrual Loans	690	760
Total Accrual	78,596	79,100
Nonaccrual	760	995
Loans, net of unearned income	79,356	80,095	$ 80,883
Commercial And Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
90 plus DPD, Accrual Loans	5	6
Total 30 plus DPD, Accrual Loans	51	76
Total Accrual	34,950	34,389
Nonaccrual	493	623
Loans, net of unearned income	35,443	35,012
Commercial Real Estate Mortgage - Owner-Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
90 plus DPD, Accrual Loans	4	2
Total 30 plus DPD, Accrual Loans	24	38
Total Accrual	6,144	6,657
Nonaccrual	140	210
Loans, net of unearned income	6,284	6,867
Commercial Real Estate Construction - Owner-Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
90 plus DPD, Accrual Loans	0	0
Total 30 plus DPD, Accrual Loans	0	1
Total Accrual	329	331
Nonaccrual	6	3
Loans, net of unearned income	335	334
Commercial Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
90 plus DPD, Accrual Loans	9	8
Total 30 plus DPD, Accrual Loans	75	115
Total Accrual	41,423	41,377
Nonaccrual	639	836
Loans, net of unearned income	42,062	42,213
Commercial Investor Real Estate Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
90 plus DPD, Accrual Loans	0	0
Total 30 plus DPD, Accrual Loans	7	14
Total Accrual	3,994	4,070
Nonaccrual	5	17
Loans, net of unearned income	3,999	4,087
Commercial Investor Real Estate Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
90 plus DPD, Accrual Loans	0	0
Total 30 plus DPD, Accrual Loans	29	0
Total Accrual	1,936	2,387
Nonaccrual	0	0
Loans, net of unearned income	1,936	2,387
Total Investor Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
90 plus DPD, Accrual Loans	0	0
Total 30 plus DPD, Accrual Loans	36	14
Total Accrual	5,930	6,457
Nonaccrual	5	17
Loans, net of unearned income	5,935	6,474
Residential First Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
90 plus DPD, Accrual Loans	174	212
Total 30 plus DPD, Accrual Loans	323	374
Total Accrual	13,858	13,390
Nonaccrual	45	50
Loans, net of unearned income	13,903	13,440
Home Equity [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
90 plus DPD, Accrual Loans	33	33
Total 30 plus DPD, Accrual Loans	122	115
Total Accrual	10,206	10,595
Nonaccrual	70	92
Loans, net of unearned income	10,276	10,687
Indirect-vehicles [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
90 plus DPD, Accrual Loans	9	10
Total 30 plus DPD, Accrual Loans	67	80
Total Accrual	3,488	4,040
Nonaccrual	1	0
Loans, net of unearned income	3,489	4,040
Indirect-other consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
90 plus DPD, Accrual Loans	0	0
Total 30 plus DPD, Accrual Loans	13	8
Total Accrual	1,318	920
Nonaccrual	0	0
Loans, net of unearned income	1,318	920
Consumer Credit Card Financing Receivable [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
90 plus DPD, Accrual Loans	16	15
Total 30 plus DPD, Accrual Loans	34	31
Total Accrual	1,214	1,196
Nonaccrual	0	0
Loans, net of unearned income	1,214	1,196
Other consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
90 plus DPD, Accrual Loans	4	5
Total 30 plus DPD, Accrual Loans	20	23
Total Accrual	1,159	1,125
Nonaccrual	0	0
Loans, net of unearned income	1,159	1,125
Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
90 plus DPD, Accrual Loans	236	275
Total 30 plus DPD, Accrual Loans	579	631
Total Accrual	31,243	31,266
Nonaccrual	116	142
Loans, net of unearned income	31,359	31,408
Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total 30 plus DPD, Accrual Loans	142	140
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial And Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total 30 plus DPD, Accrual Loans	20	11
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial Real Estate Mortgage - Owner-Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total 30 plus DPD, Accrual Loans	4	7
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial Real Estate Construction - Owner-Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total 30 plus DPD, Accrual Loans	0	0
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total 30 plus DPD, Accrual Loans	24	18
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial Investor Real Estate Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total 30 plus DPD, Accrual Loans	0	8
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial Investor Real Estate Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total 30 plus DPD, Accrual Loans	0	0
Financing Receivables, 60 to 89 Days Past Due [Member] | Total Investor Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total 30 plus DPD, Accrual Loans	0	8
Financing Receivables, 60 to 89 Days Past Due [Member] | Residential First Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total 30 plus DPD, Accrual Loans	59	63
Financing Receivables, 60 to 89 Days Past Due [Member] | Home Equity [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total 30 plus DPD, Accrual Loans	30	22
Financing Receivables, 60 to 89 Days Past Due [Member] | Indirect-vehicles [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total 30 plus DPD, Accrual Loans	13	14
Financing Receivables, 60 to 89 Days Past Due [Member] | Indirect-other consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total 30 plus DPD, Accrual Loans	5	3
Financing Receivables, 60 to 89 Days Past Due [Member] | Consumer Credit Card Financing Receivable [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total 30 plus DPD, Accrual Loans	7	7
Financing Receivables, 60 to 89 Days Past Due [Member] | Other consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total 30 plus DPD, Accrual Loans	4	5
Financing Receivables, 60 to 89 Days Past Due [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total 30 plus DPD, Accrual Loans	118	114
Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total 30 plus DPD, Accrual Loans	303	337
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial And Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total 30 plus DPD, Accrual Loans	26	59
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial Real Estate Mortgage - Owner-Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total 30 plus DPD, Accrual Loans	16	29
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial Real Estate Construction - Owner-Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total 30 plus DPD, Accrual Loans	0	1
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total 30 plus DPD, Accrual Loans	42	89
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial Investor Real Estate Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total 30 plus DPD, Accrual Loans	7	6
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial Investor Real Estate Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total 30 plus DPD, Accrual Loans	29	0
Financing Receivables, 30 to 59 Days Past Due [Member] | Total Investor Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total 30 plus DPD, Accrual Loans	36	6
Financing Receivables, 30 to 59 Days Past Due [Member] | Residential First Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total 30 plus DPD, Accrual Loans	90	99
Financing Receivables, 30 to 59 Days Past Due [Member] | Home Equity [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total 30 plus DPD, Accrual Loans	59	60
Financing Receivables, 30 to 59 Days Past Due [Member] | Indirect-vehicles [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total 30 plus DPD, Accrual Loans	45	56
Financing Receivables, 30 to 59 Days Past Due [Member] | Indirect-other consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total 30 plus DPD, Accrual Loans	8	5
Financing Receivables, 30 to 59 Days Past Due [Member] | Consumer Credit Card Financing Receivable [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total 30 plus DPD, Accrual Loans	11	9
Financing Receivables, 30 to 59 Days Past Due [Member] | Other consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total 30 plus DPD, Accrual Loans	12	13
Financing Receivables, 30 to 59 Days Past Due [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total 30 plus DPD, Accrual Loans	$ 225	$ 242

Loans and the Allowance for C48

Loans and the Allowance for Credit Losses (Impaired Financing Receivables) (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Unpaid Principal Balance	[1]	$ 1,875		$ 1,875		$ 2,077
Impaired Financing Receivable Chargeoffs And Payments Applied	[2]	142		142		131
Impaired Financing Receivable, Recorded Investment	[3]	1,733		1,733		1,946
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	[3]	73		73		170
Impaired Financing Receivable, with Related Allowance, Recorded Investment	[3]	1,660		1,660		1,776
Impaired Financing Receivable, Related Allowance		$ 273		$ 273		$ 304
Impaired Financing Receivable, Coverage Percentage	[4]	22.10%		22.10%		20.90%
Impaired Financing Receivable, Average Recorded Investment		$ 1,829	$ 2,063	$ 1,923	$ 1,960
Impaired Financing Receivable, Interest Income Recognized		15	12	41	37
Commercial And Industrial [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Unpaid Principal Balance	[1]	806		806		$ 872
Impaired Financing Receivable Chargeoffs And Payments Applied	[2]	116		116		73
Impaired Financing Receivable, Recorded Investment	[3]	690		690		799
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	[3]	60		60		126
Impaired Financing Receivable, with Related Allowance, Recorded Investment	[3]	630		630		673
Impaired Financing Receivable, Related Allowance		$ 156		$ 156		$ 171
Impaired Financing Receivable, Coverage Percentage	[4]	33.70%		33.70%		28.00%
Impaired Financing Receivable, Average Recorded Investment		$ 748	816	$ 804	670
Impaired Financing Receivable, Interest Income Recognized		3	1	9	4
Commercial Real Estate Mortgage - Owner-Occupied [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Unpaid Principal Balance	[1]	220		220		$ 291
Impaired Financing Receivable Chargeoffs And Payments Applied	[2]	19		19		25
Impaired Financing Receivable, Recorded Investment	[3]	201		201		266
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	[3]	12		12		39
Impaired Financing Receivable, with Related Allowance, Recorded Investment	[3]	189		189		227
Impaired Financing Receivable, Related Allowance		$ 44		$ 44		$ 58
Impaired Financing Receivable, Coverage Percentage	[4]	28.60%		28.60%		28.50%
Impaired Financing Receivable, Average Recorded Investment		$ 209	296	$ 234	313
Impaired Financing Receivable, Interest Income Recognized		2	1	4	3
Commercial Real Estate Construction - Owner-Occupied [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Unpaid Principal Balance	[1]	7		7		$ 5
Impaired Financing Receivable Chargeoffs And Payments Applied	[2]	0		0		1
Impaired Financing Receivable, Recorded Investment	[3]	7		7		4
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	[3]	0		0		0
Impaired Financing Receivable, with Related Allowance, Recorded Investment	[3]	7		7		4
Impaired Financing Receivable, Related Allowance		$ 2		$ 2		$ 2
Impaired Financing Receivable, Coverage Percentage	[4]	28.60%		28.60%		60.00%
Impaired Financing Receivable, Average Recorded Investment		$ 5	4	$ 5	3
Impaired Financing Receivable, Interest Income Recognized		0	0	0	0
Commercial Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Unpaid Principal Balance	[1]	1,033		1,033		$ 1,168
Impaired Financing Receivable Chargeoffs And Payments Applied	[2]	135		135		99
Impaired Financing Receivable, Recorded Investment	[3]	898		898		1,069
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	[3]	72		72		165
Impaired Financing Receivable, with Related Allowance, Recorded Investment	[3]	826		826		904
Impaired Financing Receivable, Related Allowance		$ 202		$ 202		$ 231
Impaired Financing Receivable, Coverage Percentage	[4]	32.60%		32.60%		28.30%
Impaired Financing Receivable, Average Recorded Investment		$ 962	1,116	$ 1,043	986
Impaired Financing Receivable, Interest Income Recognized		5	2	13	7
Commercial Investor Real Estate Mortgage [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Unpaid Principal Balance	[1]	83		83		$ 100
Impaired Financing Receivable Chargeoffs And Payments Applied	[2]	3		3		9
Impaired Financing Receivable, Recorded Investment	[3]	80		80		91
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	[3]	1		1		5
Impaired Financing Receivable, with Related Allowance, Recorded Investment	[3]	79		79		86
Impaired Financing Receivable, Related Allowance		$ 14		$ 14		$ 12
Impaired Financing Receivable, Coverage Percentage	[4]	20.50%		20.50%		21.00%
Impaired Financing Receivable, Average Recorded Investment		$ 93	117	$ 87	128
Impaired Financing Receivable, Interest Income Recognized		1	1	3	4
Commercial Investor Real Estate Construction [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Unpaid Principal Balance	[1]	29		29		$ 16
Impaired Financing Receivable Chargeoffs And Payments Applied	[2]	1		1		0
Impaired Financing Receivable, Recorded Investment	[3]	28		28		16
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	[3]	0		0		0
Impaired Financing Receivable, with Related Allowance, Recorded Investment	[3]	28		28		16
Impaired Financing Receivable, Related Allowance		$ 5		$ 5		$ 1
Impaired Financing Receivable, Coverage Percentage	[4]	20.70%		20.70%		6.30%
Impaired Financing Receivable, Average Recorded Investment		$ 40	36	$ 42	31
Impaired Financing Receivable, Interest Income Recognized		1	1	2	1
Total Investor Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Unpaid Principal Balance	[1]	112		112		$ 116
Impaired Financing Receivable Chargeoffs And Payments Applied	[2]	4		4		9
Impaired Financing Receivable, Recorded Investment	[3]	108		108		107
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	[3]	1		1		5
Impaired Financing Receivable, with Related Allowance, Recorded Investment	[3]	107		107		102
Impaired Financing Receivable, Related Allowance		$ 19		$ 19		$ 13
Impaired Financing Receivable, Coverage Percentage	[4]	20.50%		20.50%		19.00%
Impaired Financing Receivable, Average Recorded Investment		$ 133	153	$ 129	159
Impaired Financing Receivable, Interest Income Recognized		2	2	5	5
Residential First Mortgage [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Unpaid Principal Balance	[1]	446		446		$ 476
Impaired Financing Receivable Chargeoffs And Payments Applied	[2]	1		1		22
Impaired Financing Receivable, Recorded Investment	[3]	445		445		454
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	[3]	0		0		0
Impaired Financing Receivable, with Related Allowance, Recorded Investment	[3]	445		445		454
Impaired Financing Receivable, Related Allowance		$ 48		$ 48		$ 55
Impaired Financing Receivable, Coverage Percentage	[4]	11.00%		11.00%		16.20%
Impaired Financing Receivable, Average Recorded Investment		$ 448	464	$ 454	473
Impaired Financing Receivable, Interest Income Recognized		4	4	12	12
Home Equity [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Unpaid Principal Balance	[1]	274		274		$ 304
Impaired Financing Receivable Chargeoffs And Payments Applied	[2]	2		2		1
Impaired Financing Receivable, Recorded Investment	[3]	272		272		303
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	[3]	0		0		0
Impaired Financing Receivable, with Related Allowance, Recorded Investment	[3]	272		272		303
Impaired Financing Receivable, Related Allowance		$ 4		$ 4		$ 5
Impaired Financing Receivable, Coverage Percentage	[4]	2.20%		2.20%		2.00%
Impaired Financing Receivable, Average Recorded Investment		$ 275	317	$ 285	328
Impaired Financing Receivable, Interest Income Recognized		4	3	11	12
Indirect-vehicles [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Unpaid Principal Balance	[1]	0		0		$ 1
Impaired Financing Receivable Chargeoffs And Payments Applied	[2]	0		0		0
Impaired Financing Receivable, Recorded Investment	[3]	0		0		1
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	[3]	0		0		0
Impaired Financing Receivable, with Related Allowance, Recorded Investment	[3]	0		0		1
Impaired Financing Receivable, Related Allowance		$ 0		$ 0		$ 0
Impaired Financing Receivable, Coverage Percentage	[4]	0.00%		0.00%		0.00%
Consumer Credit Card Financing Receivable [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Unpaid Principal Balance	[1]	$ 1		$ 1		$ 2
Impaired Financing Receivable Chargeoffs And Payments Applied	[2]	0		0		0
Impaired Financing Receivable, Recorded Investment	[3]	1		1		2
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	[3]	0		0		0
Impaired Financing Receivable, with Related Allowance, Recorded Investment	[3]	1		1		2
Impaired Financing Receivable, Related Allowance		$ 0		$ 0		$ 0
Impaired Financing Receivable, Coverage Percentage	[4]	0.00%		0.00%		0.00%
Impaired Financing Receivable, Average Recorded Investment		$ 2	2	$ 2	2
Impaired Financing Receivable, Interest Income Recognized		0	0	0	0
Other consumer
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Unpaid Principal Balance	[1]	9		9		$ 10
Impaired Financing Receivable Chargeoffs And Payments Applied	[2]	0		0		0
Impaired Financing Receivable, Recorded Investment	[3]	9		9		10
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	[3]	0		0		0
Impaired Financing Receivable, with Related Allowance, Recorded Investment	[3]	9		9		10
Impaired Financing Receivable, Related Allowance		$ 0		$ 0		$ 0
Impaired Financing Receivable, Coverage Percentage	[4]	0.00%		0.00%		0.00%
Impaired Financing Receivable, Average Recorded Investment		$ 9	11	$ 10	12
Impaired Financing Receivable, Interest Income Recognized		0	1	0	1
Consumer Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Unpaid Principal Balance	[1]	730		730		$ 793
Impaired Financing Receivable Chargeoffs And Payments Applied	[2]	3		3		23
Impaired Financing Receivable, Recorded Investment	[3]	727		727		770
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	[3]	0		0		0
Impaired Financing Receivable, with Related Allowance, Recorded Investment	[3]	727		727		770
Impaired Financing Receivable, Related Allowance		$ 52		$ 52		$ 60
Impaired Financing Receivable, Coverage Percentage	[4]	7.50%		7.50%		10.50%
Impaired Financing Receivable, Average Recorded Investment		$ 734	794	$ 751	815
Impaired Financing Receivable, Interest Income Recognized		8	$ 8	23	$ 25
Non Accrual [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Unpaid Principal Balance	[1]	806		806		$ 991
Impaired Financing Receivable Chargeoffs And Payments Applied	[2]	129		129		108
Impaired Financing Receivable, Recorded Investment	[3]	677		677		883
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	[3]	73		73		170
Impaired Financing Receivable, with Related Allowance, Recorded Investment	[3]	604		604		713
Impaired Financing Receivable, Related Allowance		$ 169		$ 169		$ 202
Impaired Financing Receivable, Coverage Percentage	[4]	37.00%		37.00%		31.30%
Non Accrual [Member] | Commercial And Industrial [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Unpaid Principal Balance	[1]	$ 599		$ 599		$ 685
Impaired Financing Receivable Chargeoffs And Payments Applied	[2]	110		110		72
Impaired Financing Receivable, Recorded Investment	[3]	489		489		613
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	[3]	60		60		126
Impaired Financing Receivable, with Related Allowance, Recorded Investment	[3]	429		429		487
Impaired Financing Receivable, Related Allowance		$ 124		$ 124		$ 138
Impaired Financing Receivable, Coverage Percentage	[4]	39.10%		39.10%		30.70%
Non Accrual [Member] | Commercial Real Estate Mortgage - Owner-Occupied [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Unpaid Principal Balance	[1]	$ 156		$ 156		$ 231
Impaired Financing Receivable Chargeoffs And Payments Applied	[2]	16		16		21
Impaired Financing Receivable, Recorded Investment	[3]	140		140		210
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	[3]	12		12		39
Impaired Financing Receivable, with Related Allowance, Recorded Investment	[3]	128		128		171
Impaired Financing Receivable, Related Allowance		$ 38		$ 38		$ 53
Impaired Financing Receivable, Coverage Percentage	[4]	34.60%		34.60%		32.00%
Non Accrual [Member] | Commercial Real Estate Construction - Owner-Occupied [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Unpaid Principal Balance	[1]	$ 6		$ 6		$ 4
Impaired Financing Receivable Chargeoffs And Payments Applied	[2]	0		0		1
Impaired Financing Receivable, Recorded Investment	[3]	6		6		3
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	[3]	0		0		0
Impaired Financing Receivable, with Related Allowance, Recorded Investment	[3]	6		6		3
Impaired Financing Receivable, Related Allowance		$ 2		$ 2		$ 2
Impaired Financing Receivable, Coverage Percentage	[4]	33.30%		33.30%		75.00%
Non Accrual [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Unpaid Principal Balance	[1]	$ 761		$ 761		$ 920
Impaired Financing Receivable Chargeoffs And Payments Applied	[2]	126		126		94
Impaired Financing Receivable, Recorded Investment	[3]	635		635		826
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	[3]	72		72		165
Impaired Financing Receivable, with Related Allowance, Recorded Investment	[3]	563		563		661
Impaired Financing Receivable, Related Allowance		$ 164		$ 164		$ 193
Impaired Financing Receivable, Coverage Percentage	[4]	38.10%		38.10%		31.20%
Non Accrual [Member] | Commercial Investor Real Estate Mortgage [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Unpaid Principal Balance	[1]	$ 6		$ 6		$ 18
Impaired Financing Receivable Chargeoffs And Payments Applied	[2]	1		1		1
Impaired Financing Receivable, Recorded Investment	[3]	5		5		17
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	[3]	1		1		5
Impaired Financing Receivable, with Related Allowance, Recorded Investment	[3]	4		4		12
Impaired Financing Receivable, Related Allowance		$ 2		$ 2		$ 5
Impaired Financing Receivable, Coverage Percentage	[4]	50.00%		50.00%		33.30%
Non Accrual [Member] | Total Investor Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Unpaid Principal Balance	[1]	$ 6		$ 6		$ 18
Impaired Financing Receivable Chargeoffs And Payments Applied	[2]	1		1		1
Impaired Financing Receivable, Recorded Investment	[3]	5		5		17
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	[3]	1		1		5
Impaired Financing Receivable, with Related Allowance, Recorded Investment	[3]	4		4		12
Impaired Financing Receivable, Related Allowance		$ 2		$ 2		$ 5
Impaired Financing Receivable, Coverage Percentage	[4]	50.00%		50.00%		33.30%
Non Accrual [Member] | Residential First Mortgage [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Unpaid Principal Balance	[1]	$ 28		$ 28		$ 41
Impaired Financing Receivable Chargeoffs And Payments Applied	[2]	1		1		12
Impaired Financing Receivable, Recorded Investment	[3]	27		27		29
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	[3]	0		0		0
Impaired Financing Receivable, with Related Allowance, Recorded Investment	[3]	27		27		29
Impaired Financing Receivable, Related Allowance		$ 3		$ 3		$ 4
Impaired Financing Receivable, Coverage Percentage	[4]	14.30%		14.30%		39.00%
Non Accrual [Member] | Home Equity [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Unpaid Principal Balance	[1]	$ 11		$ 11		$ 12
Impaired Financing Receivable Chargeoffs And Payments Applied	[2]	1		1		1
Impaired Financing Receivable, Recorded Investment	[3]	10		10		11
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	[3]	0		0		0
Impaired Financing Receivable, with Related Allowance, Recorded Investment	[3]	10		10		11
Impaired Financing Receivable, Related Allowance		$ 0		$ 0		$ 0
Impaired Financing Receivable, Coverage Percentage	[4]	9.10%		9.10%		8.30%
Non Accrual [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Unpaid Principal Balance	[1]	$ 39		$ 39		$ 53
Impaired Financing Receivable Chargeoffs And Payments Applied	[2]	2		2		13
Impaired Financing Receivable, Recorded Investment	[3]	37		37		40
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	[3]	0		0		0
Impaired Financing Receivable, with Related Allowance, Recorded Investment	[3]	37		37		40
Impaired Financing Receivable, Related Allowance		$ 3		$ 3		$ 4
Impaired Financing Receivable, Coverage Percentage	[4]	12.80%		12.80%		32.10%
Accrual [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Unpaid Principal Balance	[1]	$ 1,069		$ 1,069		$ 1,086
Impaired Financing Receivable Chargeoffs And Payments Applied	[2]	13		13		23
Impaired Financing Receivable, Recorded Investment	[3]	1,056		1,056		1,063
Impaired Financing Receivable, Related Allowance		$ 104		$ 104		$ 102
Impaired Financing Receivable, Coverage Percentage	[4]	10.90%		10.90%		11.50%
Accrual [Member] | Commercial And Industrial [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Unpaid Principal Balance	[1]	$ 207		$ 207		$ 187
Impaired Financing Receivable Chargeoffs And Payments Applied	[2]	6		6		1
Impaired Financing Receivable, Recorded Investment	[3]	201		201		186
Impaired Financing Receivable, Related Allowance		$ 32		$ 32		$ 33
Impaired Financing Receivable, Coverage Percentage	[4]	18.40%		18.40%		18.20%
Accrual [Member] | Commercial Real Estate Mortgage - Owner-Occupied [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Unpaid Principal Balance	[1]	$ 64		$ 64		$ 60
Impaired Financing Receivable Chargeoffs And Payments Applied	[2]	3		3		4
Impaired Financing Receivable, Recorded Investment	[3]	61		61		56
Impaired Financing Receivable, Related Allowance		$ 6		$ 6		$ 5
Impaired Financing Receivable, Coverage Percentage	[4]	14.10%		14.10%		15.00%
Accrual [Member] | Commercial Real Estate Construction - Owner-Occupied [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Unpaid Principal Balance	[1]	$ 1		$ 1		$ 1
Impaired Financing Receivable Chargeoffs And Payments Applied	[2]	0		0		0
Impaired Financing Receivable, Recorded Investment	[3]	1		1		1
Impaired Financing Receivable, Related Allowance		$ 0		$ 0		$ 0
Impaired Financing Receivable, Coverage Percentage	[4]	0.00%		0.00%		0.00%
Accrual [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Unpaid Principal Balance	[1]	$ 272		$ 272		$ 248
Impaired Financing Receivable Chargeoffs And Payments Applied	[2]	9		9		5
Impaired Financing Receivable, Recorded Investment	[3]	263		263		243
Impaired Financing Receivable, Related Allowance		$ 38		$ 38		$ 38
Impaired Financing Receivable, Coverage Percentage	[4]	17.30%		17.30%		17.30%
Accrual [Member] | Commercial Investor Real Estate Mortgage [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Unpaid Principal Balance	[1]	$ 77		$ 77		$ 82
Impaired Financing Receivable Chargeoffs And Payments Applied	[2]	2		2		8
Impaired Financing Receivable, Recorded Investment	[3]	75		75		74
Impaired Financing Receivable, Related Allowance		$ 12		$ 12		$ 7
Impaired Financing Receivable, Coverage Percentage	[4]	18.20%		18.20%		18.30%
Accrual [Member] | Commercial Investor Real Estate Construction [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Unpaid Principal Balance	[1]	$ 29		$ 29		$ 16
Impaired Financing Receivable Chargeoffs And Payments Applied	[2]	1		1		0
Impaired Financing Receivable, Recorded Investment	[3]	28		28		16
Impaired Financing Receivable, Related Allowance		$ 5		$ 5		$ 1
Impaired Financing Receivable, Coverage Percentage	[4]	20.70%		20.70%		6.30%
Accrual [Member] | Total Investor Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Unpaid Principal Balance	[1]	$ 106		$ 106		$ 98
Impaired Financing Receivable Chargeoffs And Payments Applied	[2]	3		3		8
Impaired Financing Receivable, Recorded Investment	[3]	103		103		90
Impaired Financing Receivable, Related Allowance		$ 17		$ 17		$ 8
Impaired Financing Receivable, Coverage Percentage	[4]	18.90%		18.90%		16.30%
Accrual [Member] | Residential First Mortgage [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Unpaid Principal Balance	[1]	$ 418		$ 418		$ 435
Impaired Financing Receivable Chargeoffs And Payments Applied	[2]	0		0		10
Impaired Financing Receivable, Recorded Investment	[3]	418		418		425
Impaired Financing Receivable, Related Allowance		$ 45		$ 45		$ 51
Impaired Financing Receivable, Coverage Percentage	[4]	10.80%		10.80%		14.00%
Accrual [Member] | Home Equity [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Unpaid Principal Balance	[1]	$ 263		$ 263		$ 292
Impaired Financing Receivable Chargeoffs And Payments Applied	[2]	1		1		0
Impaired Financing Receivable, Recorded Investment	[3]	262		262		292
Impaired Financing Receivable, Related Allowance		$ 4		$ 4		$ 5
Impaired Financing Receivable, Coverage Percentage	[4]	1.90%		1.90%		1.70%
Accrual [Member] | Indirect-vehicles [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Unpaid Principal Balance	[1]	$ 0		$ 0		$ 1
Impaired Financing Receivable Chargeoffs And Payments Applied	[2]	0		0		0
Impaired Financing Receivable, Recorded Investment	[3]	0		0		1
Impaired Financing Receivable, Related Allowance		$ 0		$ 0		$ 0
Impaired Financing Receivable, Coverage Percentage	[4]	0.00%		0.00%		0.00%
Accrual [Member] | Consumer Credit Card Financing Receivable [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Unpaid Principal Balance	[1]	$ 1		$ 1		$ 2
Impaired Financing Receivable Chargeoffs And Payments Applied	[2]	0		0		0
Impaired Financing Receivable, Recorded Investment	[3]	1		1		2
Impaired Financing Receivable, Related Allowance		$ 0		$ 0		$ 0
Impaired Financing Receivable, Coverage Percentage	[4]	0.00%		0.00%		0.00%
Accrual [Member] | Other consumer
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Unpaid Principal Balance	[1]	$ 9		$ 9		$ 10
Impaired Financing Receivable Chargeoffs And Payments Applied	[2]	0		0		0
Impaired Financing Receivable, Recorded Investment	[3]	9		9		10
Impaired Financing Receivable, Related Allowance		$ 0		$ 0		$ 0
Impaired Financing Receivable, Coverage Percentage	[4]	0.00%		0.00%		0.00%
Accrual [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Unpaid Principal Balance	[1]	$ 691		$ 691		$ 740
Impaired Financing Receivable Chargeoffs And Payments Applied	[2]	1		1		10
Impaired Financing Receivable, Recorded Investment	[3]	690		690		730
Impaired Financing Receivable, Related Allowance		$ 49		$ 49		$ 56
Impaired Financing Receivable, Coverage Percentage	[4]	7.20%		7.20%		8.90%
[1]	Unpaid principal balance represents the contractual obligation due from the customer and includes the net book value plus charge-offs and payments applied.
[2]	Charge-offs and payments applied represents cumulative partial charge-offs taken, as well as interest payments received that have been applied against the outstanding principal balance.
[3]	Book value represents the unpaid principal balance less charge-offs and payments applied; it is shown before any allowance for loan losses.
[4]	Coverage % represents charge-offs and payments applied plus the related allowance as a percent of the unpaid principal balance.

Loans and the Allowance for C49

Loans and the Allowance for Credit Losses (Loans By Class Modified In TDR) (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017USD ($)obligor	Sep. 30, 2016USD ($)obligor	Sep. 30, 2017USD ($)obligor	Sep. 30, 2016USD ($)obligor
Financing Receivable, Modifications [Line Items]
Number of Obligors | obligor	204	260	689	981
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 245	$ 208	$ 755	$ 535
Increase in Allowance at Modification	$ 6	$ 5	$ 21	$ 17
Commercial And Industrial [Member]
Financing Receivable, Modifications [Line Items]
Number of Obligors | obligor	37	47	106	142
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 157	$ 117	$ 449	$ 298
Increase in Allowance at Modification	$ 2	$ 2	$ 9	$ 8
Commercial Real Estate Mortgage - Owner-Occupied [Member]
Financing Receivable, Modifications [Line Items]
Number of Obligors | obligor	33	22	94	98
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 32	$ 26	$ 97	$ 60
Increase in Allowance at Modification	$ 1	$ 1	$ 3	$ 2
Commercial Real Estate Construction - Owner-Occupied [Member]
Financing Receivable, Modifications [Line Items]
Number of Obligors | obligor			3
Financing Receivable, Modifications, Post-Modification Recorded Investment			$ 2
Increase in Allowance at Modification			$ 0
Commercial investor real estate mortgage [Member]
Financing Receivable, Modifications [Line Items]
Number of Obligors | obligor	8	19	33	68
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 45	$ 27	$ 93	$ 87
Increase in Allowance at Modification	$ 2	$ 0	$ 3	$ 1
Commercial Investor Real Estate Construction [Member]
Financing Receivable, Modifications [Line Items]
Number of Obligors | obligor		3	5	8
Financing Receivable, Modifications, Post-Modification Recorded Investment		$ 25	$ 70	$ 36
Increase in Allowance at Modification		$ 1	$ 2	$ 1
Residential First Mortgage [Member]
Financing Receivable, Modifications [Line Items]
Number of Obligors | obligor	67	51	168	189
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 9	$ 9	$ 34	$ 38
Increase in Allowance at Modification	$ 1	$ 1	$ 4	$ 5
Home Equity [Member]
Financing Receivable, Modifications [Line Items]
Number of Obligors | obligor	10	57	101	263
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 1	$ 2	$ 8	$ 13
Increase in Allowance at Modification	$ 0	$ 0	$ 0	$ 0
Consumer Credit Card Financing Receivable [Member]
Financing Receivable, Modifications [Line Items]
Number of Obligors | obligor	11	14	54	65
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0	$ 1	$ 0	$ 1
Increase in Allowance at Modification	$ 0	$ 0	$ 0	$ 0
Indirect-vehicles and other consumer [Member]
Financing Receivable, Modifications [Line Items]
Number of Obligors | obligor	38	47	125	148
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 1	$ 1	$ 2	$ 2
Increase in Allowance at Modification	$ 0	$ 0	$ 0	$ 0
Commercial Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Number of Obligors | obligor	70	69	203	240
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 189	$ 143	$ 548	$ 358
Increase in Allowance at Modification	$ 3	$ 3	$ 12	$ 10
Total Investor Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number of Obligors | obligor	8	22	38	76
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 45	$ 52	$ 163	$ 123
Increase in Allowance at Modification	$ 2	$ 1	$ 5	$ 2
Consumer Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Number of Obligors | obligor	126	169	448	665
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 11	$ 13	$ 44	$ 54
Increase in Allowance at Modification	$ 1	$ 1	$ 4	$ 5

Loans and the Allowance for C50

Loans and the Allowance for Credit Losses (Loans Modified In Past Twelve Months Which Subsequently Defaulted) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Financing Receivable, Modifications [Line Items]
Defaulted during period, where modified in a TDR twelve months prior to default	$ 3	$ 26	$ 17	$ 52
Commercial And Industrial [Member]
Financing Receivable, Modifications [Line Items]
Defaulted during period, where modified in a TDR twelve months prior to default	1	16	9	28
Commercial Real Estate Mortgage - Owner-Occupied [Member]
Financing Receivable, Modifications [Line Items]
Defaulted during period, where modified in a TDR twelve months prior to default	1	1	1	2
Commercial investor real estate mortgage [Member]
Financing Receivable, Modifications [Line Items]
Defaulted during period, where modified in a TDR twelve months prior to default	0	1	0	2
Commercial Investor Real Estate Construction [Member]
Financing Receivable, Modifications [Line Items]
Defaulted during period, where modified in a TDR twelve months prior to default	0	1	0	1
Residential First Mortgage [Member]
Financing Receivable, Modifications [Line Items]
Defaulted during period, where modified in a TDR twelve months prior to default	1	7	6	18
Home Equity [Member]
Financing Receivable, Modifications [Line Items]
Defaulted during period, where modified in a TDR twelve months prior to default	0	0	1	1
Commercial Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Defaulted during period, where modified in a TDR twelve months prior to default	2	17	10	30
Total Investor Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Defaulted during period, where modified in a TDR twelve months prior to default	0	2	0	3
Consumer Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Defaulted during period, where modified in a TDR twelve months prior to default	$ 1	$ 7	$ 7	$ 19

Loans and the Allowance for C51

Loans and the Allowance for Credit Losses (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount of loans first reported as new TDRs			$ 456	$ 347
Consumer Loans Default at 90 Days Past Due and Still Accruing			90 days
Re-Defaulted Commercial And Investor Real Estate Loans Modified In Tdr During Period And On Non Accrual Status	$ 93
Total Restructured Binding Unfunded Commitment	20		$ 20
Federal Home Loan Bank [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Pledged loans	21,700		21,700
Federal Reserve Bank [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Pledged loans	22,000		22,000
Indirect-other consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
loans purchased	$ 6		153
Indirect-vehicles and Indirect-other consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
loans purchased		$ 200		$ 779
Residential First Mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Troubled Debt Restructuring Modification Recorded Investment In Excess Of One Hundred Eighty Days Past Due And Collateral Dependent			$ 15
Residential Mortgage Period			180 days
Residential First Mortgage [Member] | Minimum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing period for consumer loans, in years			15 years
Residential First Mortgage [Member] | Maximum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing period for consumer loans, in years			30 years
Home Equity First Lien [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Troubled Debt Restructuring Modification Recorded Investment In Excess Of One Hundred Eighty Days Past Due And Collateral Dependent			$ 5
Residential Mortgage Period			180 days
Home Equity Second Lien [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Residential Mortgage Period			120 days
TDRs in excess of 120 days past due and collateral dependent			$ 2

Servicing of Financial Assets52

Servicing of Financial Assets (Analysis Of Residential Mortgage Servicing Rights Under The Fair Value Measurement Method) (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Servicing Asset at Fair Value, Amount [Roll Forward]
Carrying value, beginning of period		$ 346	$ 216	$ 324	$ 252
Additions		10	34	56	73
Increase (decrease) in fair value, due to change in valuation inputs or assumptions	[1]	(9)	(2)	(12)	(60)
Increase (decrease) in fair value, economic amortization associated with borrower repayments	[1]	(12)	(10)	(33)	(27)
Carrying value, end of period		$ 335	$ 238	$ 335	$ 238
[1]	"Economic amortization associated with borrower repayments" includes both total loan payoffs as well as partial paydowns.

Servicing of Financial Assets53

Servicing of Financial Assets (Data And Assumptions Used In The Fair Value Calculation As Well As The Valuation's Sensitivity To Rate Fluctuations Related To Residential Mortgage Servicing Rights) (Details) $ in Millions	9 Months Ended
	Sep. 30, 2017USD ($)basis_point	Sep. 30, 2016USD ($)basis_point
Servicing Assets at Fair Value [Line Items]
Unpaid principal balance	$ 32,586	$ 29,657
Weighted-average prepayment speed (CPR; percentage)	10.00%	12.30%
Estimated impact on fair value of a 10% increase in prepayment speed	$ (22)	$ (13)
Estimated impact on fair value of a 20% increase in prepayment speed	$ (40)	$ (24)
Option-adjusted spread (basis points) | basis_point	860	1,060
Estimated impact on fair value of a 10% increase in other assumptions	$ (11)	$ (9)
Estimated impact on fair value of a 20% increase in other assumptions	$ (23)	$ (18)
Weighted-average coupon interest rate	4.10%	4.20%
Weighted-average remaining maturity (months)	282 months	280 months
Weighted Average Servicing Fee Basis Points | basis_point	27.4	27.6

Servicing of Financial Assets54

Servicing of Financial Assets (Schedule Of Fees Resulting From The Servicing Of Mortgage Loans) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Transfers and Servicing of Financial Assets [Abstract]
Servicing related fees and other ancillary income	$ 24	$ 21	$ 71	$ 63

Servicing of Financial Assets55

Servicing of Financial Assets (Narrative) (Details) - USD ($) $ in Millions	Apr. 28, 2017	Sep. 01, 2016	Feb. 29, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016	Jul. 18, 2014
Servicing Assets at Fair Value [Line Items]
Unpaid Principal Balance of Outstanding Underlying MSRs Purchased	$ 2,700	$ 2,800	$ 2,600
Payments to Acquire Mortgage Servicing Rights (MSR)	$ 30	$ 22	$ 24	$ 40	$ 35
Unpaid principal balance				32,586	$ 29,657
Licensing Agreements [Member]
Servicing Assets at Fair Value [Line Items]
Other Intangible Assets, Net							$ 15
DUS Portfolio [Member]
Servicing Assets at Fair Value [Line Items]
Unpaid principal balance				2,600		$ 1,800	1,000
Commercial Real Estate [Member]
Servicing Assets at Fair Value [Line Items]
Servicing Asset at Amortized Cost				42		30	12
Loss Share Guarantee				$ 4		$ 4	$ 4

Goodwill (Schedule of Goodwill)

Goodwill (Schedule of Goodwill) (Details) $ in Millions	9 Months Ended
	Sep. 30, 2017USD ($)unit	Dec. 31, 2016USD ($)
Goodwill [Line Items]
Goodwill	$ 4,904	$ 4,904
Number of reporting units | unit	3
Corporate Bank [Member]
Goodwill [Line Items]
Goodwill	$ 2,474	2,474
Consumer Bank [Member]
Goodwill [Line Items]
Goodwill	1,978	1,978
Wealth Management [Member]
Goodwill [Line Items]
Goodwill	$ 452	$ 452

Preferred Stock Issuances (Deta

Preferred Stock Issuances (Details) - USD ($) $ in Millions		9 Months Ended	120 Months Ended
		Sep. 30, 2017	Sep. 15, 2024	Dec. 31, 2016
Class of Stock [Line Items]
Preferred Stock, Liquidation Preference, Value		$ 1,000
Preferred Stock, Carrying Amount		$ 820		$ 820
Series A Preferred Stock [Member]
Class of Stock [Line Items]
Preferred Stock, Dividend Rate, Percentage		6.375%
Preferred Stock, Liquidation Preference, Value		$ 500
Preferred Stock, Carrying Amount		$ 387		387
Series B Preferred Stock [Member]
Class of Stock [Line Items]
Preferred Stock, Dividend Rate, Percentage	[1]	6.375%
Preferred Stock, Liquidation Preference, Value		$ 500
Preferred Stock, Carrying Amount		$ 433		$ 433
Forecast [Member] | Series B Preferred Stock Dividend Scenario 1 [Member]
Class of Stock [Line Items]
Preferred Stock, Dividend Rate, Percentage			6.375%
Plus 3-Month LIBOR [Member] | Forecast [Member] | Series B Preferred Stock Dividend Scenario 2 [Member]
Class of Stock [Line Items]
Preferred Stock, Dividend Rate, Basis Spread on Variable Rate, Percentage			3.536%
[1]	Dividends, if declared, will be paid quarterly at an annual rate equal to (i) for each period beginning prior to September 15, 2024, 6.375%, and (ii) for each period beginning on or after September 15, 2024, three-month LIBOR plus 3.536%.

Schedule of Accumulated Other C

Schedule of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Accumulated Other Comprehensive Income (Loss), Net of Tax, Period Start	$ (479)	$ 148	$ (550)	$ (380)
Other comprehensive income (loss), net of tax	25	(43)	96	485
Accumulated Other Comprehensive Income (Loss), Net of Tax, Period End	(454)	105	(454)	105
Accumulated Net Unrealized Loss on Held To Maturity Securities [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Accumulated Other Comprehensive Income (Loss), Net of Tax, Period Start	(30)	(40)	(33)	(47)
Other comprehensive income (loss), net of tax	1	5	4	12
Accumulated Other Comprehensive Income (Loss), Net of Tax, Period End	(29)	(35)	(29)	(35)
Accumulated Net Unrealized Securities Available For Sale Gain (Loss) [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Accumulated Other Comprehensive Income (Loss), Net of Tax, Period Start	(55)	297	(106)	(10)
Other comprehensive income (loss), net of tax	21	(13)	72	294
Accumulated Other Comprehensive Income (Loss), Net of Tax, Period End	(34)	284	(34)	284
Accumulated Net Gain (Loss) from Derivative Instruments Designated as Cash Flow Hedges [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Accumulated Other Comprehensive Income (Loss), Net of Tax, Period Start	11	278	11	75
Other comprehensive income (loss), net of tax	(4)	(40)	(4)	163
Accumulated Other Comprehensive Income (Loss), Net of Tax, Period End	7	238	7	238
Accumulated Defined Benefit Plans Adjustment [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Accumulated Other Comprehensive Income (Loss), Net of Tax, Period Start	(405)	(387)	(422)	(398)
Other comprehensive income (loss), net of tax	7	5	24	16
Accumulated Other Comprehensive Income (Loss), Net of Tax, Period End	$ (398)	$ (382)	$ (398)	$ (382)

Reclassification from Accumulat

Reclassification from Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest Income (Expense), Net		$ 898	$ 835	$ 2,639	$ 2,545
Securities gains (losses), net		8	0	9	1
Salaries and employee benefits		(483)	(486)	(1,458)	(1,441)
Income tax (expense) benefit		(139)	(152)	(400)	(380)
Net income		311	320	928	868
Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income	[1]	4	11	17	40
Accumulated Net Unrealized Loss on Held To Maturity Securities [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest Income (Expense), Net	[1]	(2)	(9)	(7)	(20)
Income tax (expense) benefit	[1]	1	4	3	8
Net income	[1]	(1)	(5)	(4)	(12)
Accumulated Net Unrealized Securities Available For Sale Gain (Loss) [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Securities gains (losses), net	[1]	4	0	5	1
Income tax (expense) benefit	[1]	(2)	0	(2)	0
Net income	[1]	2	0	3	1
Accumulated Net Gain (Loss) from Derivative Instruments Designated as Cash Flow Hedges [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest Income (Expense), Net	[1]	17	35	70	109
Income tax (expense) benefit	[1]	(7)	(13)	(27)	(41)
Net income	[1]	10	22	43	68
Accumulated Defined Benefit Plans Adjustment, Net Unamortized Gain (Loss) [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Salaries and employee benefits	[1],[2]	(11)	(9)	(39)	(26)
Accumulated Defined Benefit Plans Adjustment [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Salaries and employee benefits	[1]	(11)	(9)	(39)	(26)
Income tax (expense) benefit	[1]	4	3	14	9
Net income	[1]	$ (7)	$ (6)	$ (25)	$ (17)
[1]	(1) Amounts in parentheses indicate reductions to net income.
[2]	(2) These accumulated other comprehensive income (loss) components are included in the computation of net periodic pension cost and are included in salaries and employee benefits on the consolidated statements of income (see Note 10 for additional details).

Stockholders' Equity And Accu60

Stockholders' Equity And Accumulated Other Comprehensive Income (Loss) (Narrative) (Details) - USD ($) $ / shares in Units, shares in Millions

Nov. 07, 2017

Sep. 30, 2017

Jun. 30, 2017

Mar. 31, 2017

Sep. 30, 2016

Jun. 30, 2016

Mar. 31, 2016

Sep. 30, 2017

Sep. 30, 2016

Sep. 15, 2024

Dec. 15, 2017

Jun. 28, 2017

Stockholders' Equity And Comprehensive Income (Loss) [Line Items]

Dividends, Preferred Stock

$ 48,000,000

$ 48,000,000

Cash dividend declared (in dollars per share)

$ 0.09

$ 0.07

$ 0.065

$ 0.065

$ 0.065

$ 0.06

$ 0.225

$ 0.19

Stock repurchase plan (in shares)

$ 1,470,000,000

Shares repurchased (in shares)

34.6

ValueofTotalCommonStockRepurchasedUnderCurrentRepurchaseProgram

$ 500,000,000

Payments for Repurchase of Common Stock

$ 775,000,000

$ 569,000,000

Subsequent Event [Member]

Stockholders' Equity And Comprehensive Income (Loss) [Line Items]

Shares repurchased (in shares)

7.8

Payments for Repurchase of Common Stock

$ 122,400,000

Series B Preferred Stock Dividend Scenario 1 [Member] | Forecast [Member]

Stockholders' Equity And Comprehensive Income (Loss) [Line Items]

Preferred Stock, Dividend Rate, Percentage

6.375%

Series B Preferred Stock Dividend Scenario 2 [Member] | Forecast [Member] | Plus 3-Month LIBOR [Member]

Stockholders' Equity And Comprehensive Income (Loss) [Line Items]

Preferred Stock, Dividend Rate, Basis Spread on Variable Rate, Percentage

3.536%

Series A Preferred Stock [Member]

Stockholders' Equity And Comprehensive Income (Loss) [Line Items]

Preferred Stock, Dividend Rate, Percentage

6.375%

Dividends, Preferred Stock

$ 24,000,000

24,000,000

Series A Preferred Stock [Member] | Subsequent Event [Member]

Stockholders' Equity And Comprehensive Income (Loss) [Line Items]

ExcessofRedemptionAmountOverCarryingAmount

$ 113,000,000

PreferredDividendsReductiontoRetainedEarningsatRedemption

100,000,000

PreferredStockIssuanceCostsReductiontoNetIncome

$ 13,000,000

Series A Preferred Stock [Member] | Debt Instrument, Redemption, Period One [Member]

Stockholders' Equity And Comprehensive Income (Loss) [Line Items]

Preferred Stock, Redemption Terms

90 days

Series B Preferred Stock [Member]

Stockholders' Equity And Comprehensive Income (Loss) [Line Items]

Preferred Stock, Dividend Rate, Percentage

[1]

6.375%

Dividends, Preferred Stock

$ 24,000,000

$ 24,000,000

Series B Preferred Stock [Member] | Subsequent Event [Member]

Stockholders' Equity And Comprehensive Income (Loss) [Line Items]

ExcessofRedemptionAmountOverCarryingAmount

$ 67,000,000

PreferredDividendsReductiontoRetainedEarningsatRedemption

52,000,000

PreferredStockIssuanceCostsReductiontoNetIncome

$ 15,000,000

Preferred Stock [Member]

Stockholders' Equity And Comprehensive Income (Loss) [Line Items]

Preferred Stock, liquidation preference per share (in dollars per share)

$ 1,000

$ 1,000

Preferred Stock [Member] | Depositary Shares [Member]

Stockholders' Equity And Comprehensive Income (Loss) [Line Items]

Preferred Stock, liquidation preference per share (in dollars per share)

$ 25

$ 25

[1]

Dividends, if declared, will be paid quarterly at an annual rate equal to (i) for each period beginning prior to September 15, 2024, 6.375%, and (ii) for each period beginning on or after September 15, 2024, three-month LIBOR plus 3.536%.

Earnings (Loss) Per Common Sh61

Earnings (Loss) Per Common Share (Computation Of Basic And Diluted Earnings (Loss) Per Common Share) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Numerator:
Income from continuing operations		$ 312	$ 319	$ 923	$ 864
Preferred stock dividends		(16)	(16)	(48)	(48)
Net Income (Loss) from Continuing Operations Available to Common Shareholders, Basic		296	303	875	816
Income (loss) from discontinued operations, net of tax		(1)	1	5	4
Net income available to common shareholders		$ 295	$ 304	$ 880	$ 820
Denominator:
Weighted-average common shares outstanding—basic (in shares)		1,182	1,246	1,197	1,266
Potential common shares (in shares)		11	6	12	4
Weighted-average common shares outstanding—diluted (in shares)		1,193	1,252	1,209	1,270
Earnings per common share from continuing operations:
Basic (in dollars per share)	[1]	$ 0.25	$ 0.24	$ 0.73	$ 0.64
Diluted (in dollars per share)	[1]	0.25	0.24	0.72	0.64
Earning (Loss) Per Common Share From Discontinued Operations:
Basic (in dollars per share)	[1]	0	0	0	0
Diluted (in dollars per share)	[1]	0	0	0	0
Earnings per common share:
Basic (in dollars per share)	[1]	0.25	0.24	0.74	0.65
Diluted (in dollars per share)	[1]	$ 0.25	$ 0.24	$ 0.73	$ 0.65
Antidilutive Securities Excluded from Computation of Earnings Per Share (in shares)		14	27	15	29
[1]	Certain per share amounts may not appear to reconcile due to rounding.

Share-Based Payments (Summary O

Share-Based Payments (Summary Of Activity Related To Stock Options) (Details) - $ / shares	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Number of Options, Outstanding at beginning of period	13,455,047	19,350,157
Number of Options, Exercised	(1,114,766)	(568,882)
Number of Options, Forfeited or Expired	(2,727,357)	(3,840,704)
Number of Options, Outstanding at end of period	9,612,924	14,940,571
Number of Options, Exercisable at end of period	9,612,924	14,940,571
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Weighted-Average Exercise Price, Outstanding at beginning of period (in dollars per share)	$ 19.37	$ 21.06
Weighted-Average Exercise Price, Exercised (in dollars per share)	6.66	5.86
Weighted-Average Exercise Price, Forfeited or Expired (in dollars per share)	34.51	34.68
Weighted-Average Exercise Price, Outstanding at end of period (in dollars per share)	16.55	18.14
Weighted-Average Exercise Price, Exercisable at end of period (in dollars per share)	$ 16.55	$ 18.14

Share-Based Payments (Summary63

Share-Based Payments (Summary Of Restricted Stock Award And Unit Activity) (Details) - $ / shares	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Number of Shares, Non-vested at beginning of period	16,558,942	16,374,242
Number of Shares, Granted	3,976,193	6,840,385
Number of Shares, Vested	(4,623,917)	(5,735,271)
Number of Shares, Forfeited	(522,258)	(686,347)
Number of Shares, Non-vested at end of period	15,388,960	16,793,009
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Weighted-Average Grant Date Fair Value, Non-vested at beginning of period (in dollars per share)	$ 9.31	$ 9.51
Weighted-Average Grant Date Fair Value, Granted (in dollars per share)	14.57	7.92
Weighted-Average Grant Date Fair Value, Vested (in dollars per share)	11.08	8.25
Weighted-Average Grant Date Fair Value, Forfeited (in dollars per share)	10	9.18
Weighted-Average Grant Date Fair Value, Non-vested at end of period (in dollars per share)	$ 10.12	$ 9.31

Share-Based Payments (Narrative

Share-Based Payments (Narrative) (Details) - shares shares in Millions	9 Months Ended
	Sep. 30, 2017	Apr. 23, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period of stock options and restricted stock (in years)	3 years
Contractual lives of options granted under long-term incentive compensation plans	10 years
Number of share equivalents authorized for issuance under the long term compensation plan		60
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	45

Pension and Other Postretirem65

Pension and Other Postretirement Benefits (Schedule of Net Periodic Pension Cost) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Defined Benefit Plan Disclosure [Line Items]
Service Cost	$ 9	$ 10	$ 28	$ 29
Interest Cost	19	20	57	59
Expected Return on Plan Assets	(35)	(36)	(106)	(108)
Amortization of Actuarial Loss	9	9	27	26
Settlement Charge	2	0	12	0
Net Periodic Pension Cost (Credit)	4	3	18	6
Contributions by Employer	75
Qualified Plan [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service Cost	8	9	25	26
Interest Cost	18	19	54	55
Expected Return on Plan Assets	(35)	(36)	(106)	(108)
Amortization of Actuarial Loss	8	8	24	24
Settlement Charge	0	0	0	0
Net Periodic Pension Cost (Credit)	(1)	0	(3)	(3)
Nonqualified Plan [Member] | Supplemental Employee Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service Cost	1	1	3	3
Interest Cost	1	1	3	4
Expected Return on Plan Assets	0	0	0	0
Amortization of Actuarial Loss	1	1	3	2
Settlement Charge	2	0	12	0
Net Periodic Pension Cost (Credit)	$ 5	$ 3	$ 21	$ 9

Derivative Financial Instrume66

Derivative Financial Instruments and Hedging Activities (Schedule of Derivative Instruments Notional and Fair Value) (Details) - USD ($) $ in Millions		Sep. 30, 2017	Dec. 31, 2016
Derivatives, Fair Value [Line Items]
Notional Amount		$ 87,686	$ 81,403
Estimated Fair Value, Gain	[1]	414	579
Estimated Fair Value, Loss	[1]	605	887
Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Notional Amount		10,280	11,257
Estimated Fair Value, Gain	[1]	22	26
Estimated Fair Value, Loss	[1]	190	309
Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Notional Amount		77,406	70,146
Estimated Fair Value, Gain	[1]	392	553
Estimated Fair Value, Loss	[1]	415	578
Interest Rate Swaps [Member] | Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Notional Amount		40,124	41,851
Interest Rate Swaps [Member] | Not Designated as Hedging Instrument [Member] | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Estimated Fair Value, Gain	[1]	315	412
Interest Rate Swaps [Member] | Not Designated as Hedging Instrument [Member] | Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Estimated Fair Value, Loss	[1]	352	467
Interest Rate Options [Member] | Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Notional Amount		3,787	3,877
Interest Rate Options [Member] | Not Designated as Hedging Instrument [Member] | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Estimated Fair Value, Gain	[1]	20	24
Interest Rate Options [Member] | Not Designated as Hedging Instrument [Member] | Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Estimated Fair Value, Loss	[1]	10	12
Interest Rate Futures And Forward Commitments [Member] | Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Notional Amount		27,944	18,605
Interest Rate Futures And Forward Commitments [Member] | Not Designated as Hedging Instrument [Member] | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Estimated Fair Value, Gain	[1]	4	11
Interest Rate Futures And Forward Commitments [Member] | Not Designated as Hedging Instrument [Member] | Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Estimated Fair Value, Loss	[1]	7	6
Other Contract [Member] | Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Notional Amount		5,551	5,813
Other Contract [Member] | Not Designated as Hedging Instrument [Member] | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Estimated Fair Value, Gain	[1]	53	106
Other Contract [Member] | Not Designated as Hedging Instrument [Member] | Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Estimated Fair Value, Loss	[1]	46	93
Fair Value Hedging [Member] | Interest Rate Swaps [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Notional Amount		3,130	2,257
Fair Value Hedging [Member] | Interest Rate Swaps [Member] | Designated as Hedging Instrument [Member] | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Estimated Fair Value, Gain	[1]	1	7
Fair Value Hedging [Member] | Interest Rate Swaps [Member] | Designated as Hedging Instrument [Member] | Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Estimated Fair Value, Loss	[1]	37	40
Cash Flow Hedging [Member] | Interest Rate Swaps [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Notional Amount		7,150	9,000
Cash Flow Hedging [Member] | Interest Rate Swaps [Member] | Designated as Hedging Instrument [Member] | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Estimated Fair Value, Gain	[1]	21	19
Cash Flow Hedging [Member] | Interest Rate Swaps [Member] | Designated as Hedging Instrument [Member] | Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Estimated Fair Value, Loss	[1]	$ 153	$ 269
[1]	Derivatives in a gain position are recorded as other assets and derivatives in a loss position are recorded as other liabilities on the consolidated balance sheets.

Derivative Financial Instrume67

Derivative Financial Instruments And Hedging Activities (Schedule Of The Effect Of Derivative Instruments On The Statements Of Operations) (Details) - Designated as Hedging Instrument [Member] - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Fair Value Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain or (Loss) Recognized in Income on Derivatives		$ (6)	$ (21)	$ (4)	$ (29)
Gain or (Loss) Recognized in Income on Related Hedged Item		6	19	3	27
Fair Value Hedging [Member] | Interest Rate Swaps [Member] | Debt/CDs [Member] | Interest Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain or (Loss) Recognized in Income on Derivatives		1	2	2	10
Gain or (Loss) Recognized in Income on Related Hedged Item		0	0	0	(2)
Fair Value Hedging [Member] | Interest Rate Swaps [Member] | Debt/CDs [Member] | Other Non-Interest Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain or (Loss) Recognized in Income on Derivatives		(6)	(23)	(1)	4
Gain or (Loss) Recognized in Income on Related Hedged Item		6	24	2	(3)
Fair Value Hedging [Member] | Interest Rate Swaps [Member] | Available-for-sale Securities [Member] | Other Non-Interest Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain or (Loss) Recognized in Income on Derivatives		0	2	(2)	(36)
Gain or (Loss) Recognized in Income on Related Hedged Item		0	(5)	1	32
Fair Value Hedging [Member] | Interest Rate Swaps [Member] | Available-for-sale Securities [Member] | Interest Income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain or (Loss) Recognized in Income on Derivatives		(1)	(2)	(3)	(7)
Gain or (Loss) Recognized in Income on Related Hedged Item		0	0	0	0
Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain or (Loss) Recognized in AOCI	[1],[2]	(4)	(40)	(4)	163
Gain or (Loss) Reclassified from AOCI into Income	[2],[3]	17	35	70	109
Cash Flow Hedging [Member] | Interest Rate Swaps [Member] | Interest Income On Loans [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain or (Loss) Recognized in AOCI	[1],[2]	(4)	(40)	(4)	163
Gain or (Loss) Reclassified from AOCI into Income	[2],[3]	$ 17	$ 35	$ 70	$ 109
[1]	After-tax
[2]	All cash flow hedges were highly effective for all periods presented, and the change in fair value attributed to hedge ineffectiveness was not material.
[3]	Pre-tax

Derivative Financial Instrume68

Derivative Financial Instruments and Hedging Activities (Schedule of Gains (Losses) Recognized Related to Derivatives Not Designated as Hedging Instruments) (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Derivative [Line Items]
Gain or (Loss) of Derivatives Not Designated as Hedging Instruments		$ 23	$ 0	$ 27	$ 79
Capital Markets Fee Income [Member]
Derivative [Line Items]
Gain or (Loss) of Derivatives Not Designated as Hedging Instruments	[1]	22	(4)	28	18
Capital Markets Fee Income [Member] | Interest Rate Swaps [Member]
Derivative [Line Items]
Gain or (Loss) of Derivatives Not Designated as Hedging Instruments	[1]	3	4	9	7
Capital Markets Fee Income [Member] | Interest Rate Options [Member]
Derivative [Line Items]
Gain or (Loss) of Derivatives Not Designated as Hedging Instruments	[1]	9	2	19	16
Capital Markets Fee Income [Member] | Interest Rate Futures And Forward Commitments [Member]
Derivative [Line Items]
Gain or (Loss) of Derivatives Not Designated as Hedging Instruments	[1]	1	1	6	4
Capital Markets Fee Income [Member] | Other Contract [Member]
Derivative [Line Items]
Gain or (Loss) of Derivatives Not Designated as Hedging Instruments	[1]	9	(11)	(6)	(9)
Mortgage Income [Member]
Derivative [Line Items]
Gain or (Loss) of Derivatives Not Designated as Hedging Instruments		1	4	(1)	61
Mortgage Income [Member] | Interest Rate Swaps [Member]
Derivative [Line Items]
Gain or (Loss) of Derivatives Not Designated as Hedging Instruments		1	(3)	7	45
Mortgage Income [Member] | Interest Rate Options [Member]
Derivative [Line Items]
Gain or (Loss) of Derivatives Not Designated as Hedging Instruments		(2)	(1)	(3)	7
Mortgage Income [Member] | Interest Rate Futures And Forward Commitments [Member]
Derivative [Line Items]
Gain or (Loss) of Derivatives Not Designated as Hedging Instruments		$ 2	$ 8	$ (5)	$ 9
[1]	Capital markets fee income and other is included in Other income on the consolidated statements of income.

Derivative Financial Instrume69

Derivative Financial Instruments and Hedging Activities (Offsetting Derivatives) (Details) - USD ($) $ in Millions		Sep. 30, 2017	Dec. 31, 2016
Offsetting Derivative Assets [Abstract]
Offsetting Derivative Assets, Gross amounts recognized	[1]	$ 414	$ 579
Offsetting Derivative Assets, Gross amounts offset in the consolidated balance sheets	[2]	158	241
Offsetting Derivative Assets, Net amounts presented in the consolidated balance sheets		256	338
Offsetting Derivative Assets, Gross amounts not offset in the consolidated balance sheets
Financial instruments		3	4
Cash collateral received/posted		0	0
Net amounts		253	334
Offsetting Derivative Liabilities [Abstract]
Offsetting Derivative Liabilities, Gross Amount Recognized	[1]	605	887
Offsetting Derivative Liabilities, Gross amounts offset in the consolidated balance sheets	[2]	265	541
Offsetting Derivative Liabilities, Net amounts presented in the consolidated balance sheets		340	346
Offsetting Derivative Liabilities, Gross amounts not offset in the consolidated balance sheets
Financial instruments		50	50
Cash collateral received/posted		250	227
Net amounts		40	69
Cash collateral received, offset		40	48
Cash collateral posted		148	349
Subject to offsetting [Member]
Offsetting Derivative Assets [Abstract]
Offsetting Derivative Assets, Gross amounts recognized		259	414
Offsetting Derivative Liabilities [Abstract]
Offsetting Derivative Liabilities, Gross Amount Recognized		347	583
Not subject to offsetting [Member]
Offsetting Derivative Assets [Abstract]
Offsetting Derivative Assets, Gross amounts recognized		155	165
Offsetting Derivative Liabilities [Abstract]
Offsetting Derivative Liabilities, Gross Amount Recognized		$ 258	$ 304
[1]	Derivatives in a gain position are recorded as other assets and derivatives in a loss position are recorded as other liabilities on the consolidated balance sheets.
[2]	At September 30, 2017, gross amounts of derivative assets and liabilities offset in the consolidated balance sheets presented above include cash collateral received of $40 million and cash collateral posted of $148 million. At December 31, 2016, gross amounts of derivative assets and liabilities offset in the consolidated balance sheets presented above include cash collateral received of $48 million and cash collateral posted of $349 million.

Derivative Financial Instrume70

Derivative Financial Instruments And Hedging Activities (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Terminated Cash Flow Hedge Unrealized Gain (Loss) To Be Reclassified From OCI, After Tax Amount			$ 130	$ 179
Cash Flow Hedge Pre Tax Income (Loss)	$ 16	$ 22	53	$ 46
Cash flow hedge gain expected to be reclassified from other comprehensive income into earnings within the next 12 months			52
Pre-tax net income related to amortization of discontinued cash flow hedges			$ 56
Maximum Length of Time Hedged in Cash Flow Hedge			8 years
Derivative, Notional Amount	87,686		$ 87,686		$ 81,403
Credit risk, defined as all positive exposures not collateralized	253		253		334
Maximum potential future exposure on swap participations	296		296
Aggregate fair value of all derivative instruments with credit risk	102		102		141
Posted collateral related to derivative instruments with credit risk	104		104		141
Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	10,280		10,280		11,257
Not Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	77,406		77,406		70,146
Interest Rate Swaps [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	40,124		40,124		41,851
Interest Rate Lock Commitments [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	289		289		274
Forward Sale Commitments [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	584		584		786
Forward Rate Commitments and Futures Contracts [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	6,400		6,400		7,200
Cash Flow Hedging [Member] | Interest Rate Swaps [Member] | Designated as Hedging Instrument [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	$ 7,150		$ 7,150		$ 9,000

Fair Value Measurements (Schedu

Fair Value Measurements (Schedule Of Assets And Liabilities At Fair Value Measured On A Recurring Basis And Non-Recurring Basis) (Details) - USD ($) $ in Millions	Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Dec. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Securities	$ 193		$ 124
Securities available for sale	23,659		23,781
Loans held for sale	307		447
Servicing Asset at Fair Value, Amount	335	$ 346	324	$ 238	$ 216	$ 252
Derivative Asset	256		338
Derivative Liabilities	340		346
Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Securities	193		124
Securities available for sale	23,659		23,781
Loans held for sale	307		447
Servicing Asset at Fair Value, Amount	335		324
Derivative Asset	414		579
Derivative Liabilities	605		887
Nonrecurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held for sale	5		7
Fair Value Foreclosed Property And Other Real Estate And Equipment Nonrecurring Basis	38		35
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Securities	193		124
Securities available for sale	511		504
Loans held for sale	0		0
Derivative Asset	2		2
Derivative Liabilities	2		1
Level 1 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Securities	193		124
Securities available for sale	511		504
Loans held for sale	0		0
Servicing Asset at Fair Value, Amount	0		0
Derivative Asset	2		2
Derivative Liabilities	2		1
Level 1 [Member] | Nonrecurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held for sale	0		0
Fair Value Foreclosed Property And Other Real Estate And Equipment Nonrecurring Basis	0		0
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Securities	0		0
Securities available for sale	23,141		23,270
Loans held for sale	388		689
Derivative Asset	402		566
Derivative Liabilities	603		886
Level 2 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Securities	0		0
Securities available for sale	23,141		23,270
Loans held for sale	307		414
Servicing Asset at Fair Value, Amount	0		0
Derivative Asset	402		566
Derivative Liabilities	603		886
Level 2 [Member] | Nonrecurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held for sale	0		0
Fair Value Foreclosed Property And Other Real Estate And Equipment Nonrecurring Basis	32		29
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Securities	0		0
Securities available for sale	7		7
Loans held for sale	0		33
Derivative Asset	10		11
Derivative Liabilities	0		0
Level 3 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Securities	0		0
Securities available for sale	7		7
Loans held for sale	0		33
Servicing Asset at Fair Value, Amount	335		324
Derivative Asset	10		11
Derivative Liabilities	0		0
Level 3 [Member] | Nonrecurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held for sale	5		7
Fair Value Foreclosed Property And Other Real Estate And Equipment Nonrecurring Basis	6		6
Interest Rate Swaps [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	337		438
Derivative Liabilities	542		776
Interest Rate Swaps [Member] | Level 1 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	0		0
Derivative Liabilities	0		0
Interest Rate Swaps [Member] | Level 2 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	337		438
Derivative Liabilities	542		776
Interest Rate Swaps [Member] | Level 3 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	0		0
Derivative Liabilities	0		0
Interest Rate Options [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	20		24
Derivative Liabilities	10		12
Interest Rate Options [Member] | Level 1 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	0		0
Derivative Liabilities	0		0
Interest Rate Options [Member] | Level 2 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	10		13
Derivative Liabilities	10		12
Interest Rate Options [Member] | Level 3 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	10		11
Derivative Liabilities	0		0
Interest Rate Futures And Forward Commitments [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	4		11
Derivative Liabilities	7		6
Interest Rate Futures And Forward Commitments [Member] | Level 1 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	0		0
Derivative Liabilities	0		0
Interest Rate Futures And Forward Commitments [Member] | Level 2 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	4		11
Derivative Liabilities	7		6
Interest Rate Futures And Forward Commitments [Member] | Level 3 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	0		0
Derivative Liabilities	0		0
Other Contract [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	53		106
Derivative Liabilities	46		93
Other Contract [Member] | Level 1 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	2		2
Derivative Liabilities	2		1
Other Contract [Member] | Level 2 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	51		104
Derivative Liabilities	44		92
Other Contract [Member] | Level 3 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	0		0
Derivative Liabilities	0		0
US Treasury Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	308		303
US Treasury Securities [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	308		303
US Treasury Securities [Member] | Level 1 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	308		303
US Treasury Securities [Member] | Level 2 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	0		0
US Treasury Securities [Member] | Level 3 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	0		0
Federal Agency Securities [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	24		35
Federal Agency Securities [Member] | Level 1 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	0		0
Federal Agency Securities [Member] | Level 2 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	24		35
Federal Agency Securities [Member] | Level 3 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	0		0
Obligations of States and Political Subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale			1
Obligations of States and Political Subdivisions [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	0		1
Obligations of States and Political Subdivisions [Member] | Level 1 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	0		0
Obligations of States and Political Subdivisions [Member] | Level 2 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	0		1
Obligations of States and Political Subdivisions [Member] | Level 3 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	0		0
Residential Agency [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	17,484		17,371
Residential Agency [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	17,484		17,371
Residential Agency [Member] | Level 1 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	0		0
Residential Agency [Member] | Level 2 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	17,484		17,371
Residential Agency [Member] | Level 3 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	0		0
Residential Non-Agency [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	3		4
Residential Non-Agency [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	3		4
Residential Non-Agency [Member] | Level 1 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	0		0
Residential Non-Agency [Member] | Level 2 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	0		0
Residential Non-Agency [Member] | Level 3 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	3		4
Commercial Agency [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	3,626		3,463
Commercial Agency [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	3,626		3,463
Commercial Agency [Member] | Level 1 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	0		0
Commercial Agency [Member] | Level 2 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	3,626		3,463
Commercial Agency [Member] | Level 3 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	0		0
Commercial Non-Agency [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	809		1,129
Commercial Non-Agency [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	809		1,129
Commercial Non-Agency [Member] | Level 1 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	0		0
Commercial Non-Agency [Member] | Level 2 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	809		1,129
Commercial Non-Agency [Member] | Level 3 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	0		0
Corporate and other debt securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	1,202		1,274
Corporate and other debt securities [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	1,202		1,274
Corporate and other debt securities [Member] | Level 1 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	0		0
Corporate and other debt securities [Member] | Level 2 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	1,198		1,271
Corporate and other debt securities [Member] | Level 3 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	4		3
Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	203		201
Equity Securities [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	203		201
Equity Securities [Member] | Level 1 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	203		201
Equity Securities [Member] | Level 2 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	0		0
Equity Securities [Member] | Level 3 [Member] | Recurring Fair Value Measurements [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	$ 0		$ 0

Fair Value Measurements (Rollfo

Fair Value Measurements (Rollforward For Assets And Liabilities Measured At Fair Value On A Recurring Basis With Level 3 Significant Unobservable Inputs) (Details) - USD ($) $ in Millions		3 Months Ended				9 Months Ended
		Sep. 30, 2017		Sep. 30, 2016		Sep. 30, 2017		Sep. 30, 2016
Trading Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Opening balance								$ 33
Gain (Loss) Included in Earnings	[1]							(2)
Gain (Loss) Included in Other Comprehensive Income (Loss)								0
Purchases								0
Sales								(31)
Issuances								0
Settlements								0
Transfers Into Level 3								0
Transfers Out Of Level 3								0
Closing balance				$ 0				0
Residential Non-Agency [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Opening balance		$ 3		5		$ 4		5
Gain (Loss) Included in Earnings		0		0		0		0
Gain (Loss) Included in Other Comprehensive Income (Loss)		0		0		0		0
Purchases		0		0		0		0
Sales		0		0		0		0
Issuances		0		0		0		0
Settlements		0		0		(1)		0
Transfers Into Level 3		0		0		0		0
Transfers Out Of Level 3		0		0		0		0
Closing balance		3		5		3		5
Corporate and other debt securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Opening balance		4		3		3		3
Gain (Loss) Included in Earnings		0		0		0		0
Gain (Loss) Included in Other Comprehensive Income (Loss)		0		0		0		0
Purchases		0		0		0		0
Sales		0		0		0		0
Issuances		0		0		0		0
Settlements		0		0		0		0
Transfers Into Level 3		0		0		1		0
Transfers Out Of Level 3		0		0		0		0
Closing balance		4		3		4		3
Available-for-sale Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Opening balance		7		8		7		8
Gain (Loss) Included in Earnings		0		0		0		0
Gain (Loss) Included in Other Comprehensive Income (Loss)		0		0		0		0
Purchases		0		0		0		0
Sales		0		0		0		0
Issuances		0		0		0		0
Settlements		0		0		(1)		0
Transfers Into Level 3		0		0		1		0
Transfers Out Of Level 3		0		0		0		0
Closing balance		7		8		7		8
Commercial mortgage loans held for sale [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Opening balance		0		30		33		0
Gain (Loss) Included in Earnings		0		0		0		0
Gain (Loss) Included in Other Comprehensive Income (Loss)		0		0		0		0
Purchases		0		0		7		0
Sales		0		0		(40)		0
Issuances		0		60		0		90
Settlements		0		0		0		0
Transfers Into Level 3		0		0		0		0
Transfers Out Of Level 3		0		0		0		0
Closing balance		0		90		0		90
Residential Mortgage Servicing Rights [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Opening balance		346		216		324		252
Gain (Loss) Included in Earnings	[2]	(21)		(12)		(45)		(87)
Gain (Loss) Included in Other Comprehensive Income (Loss)		0		0		0		0
Purchases		10		34		56		73
Sales		0		0		0		0
Issuances		0		0		0		0
Settlements		0		0		0		0
Transfers Into Level 3		0		0		0		0
Transfers Out Of Level 3		0		0		0		0
Closing balance		335		238		335		238
Derivative [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Opening balance		13		17		11		10
Gain (Loss) Included in Earnings		31	[3]	32	[4]	87	[5]	105	[6]
Gain (Loss) Included in Other Comprehensive Income (Loss)		0		0		0		0
Purchases		0		0		0		0
Sales		0		0		0		0
Issuances		0		0		0		0
Settlements		(34)		(33)		(88)		(99)
Transfers Into Level 3		0		0		0		0
Transfers Out Of Level 3		0		0		0		0
Closing balance		10		16		10		16
Capital Markets Fee Income [Member] | Derivative [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Gain (Loss) Included in Earnings		8		3		18		16
Mortgage Income [Member] | Derivative [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Gain (Loss) Included in Earnings		$ 23		$ 29		$ 69		$ 89
[1]	Included in capitals markets fee income and other.
[2]	Included in mortgage income.
[3]	Approximately $8 million was included in capital markets fee income and other and $23 million was included in mortgage income.
[4]	Approximately $3 million was included in capital markets fee income and other and $29 million was included in mortgage income.
[5]	Approximately $18 million was included in capital markets fee income and other and $69 million was included in mortgage income.
[6]	Approximately $16 million was included in capital markets fee income and other and $89 million was included in mortgage income.

Fair Value Measurements (Sche73

Fair Value Measurements (Schedule Of Fair Value Adjustments Related To Non-Recurring Fair Value Measurements) (Details) - Nonrecurring Fair Value Measurements [Member] - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Loans Held For Sale [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Adjustment	$ (1)	$ (3)	$ (8)	$ (25)
Foreclosed Property And Other Real Estate [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Adjustment	$ (6)	$ (8)	$ (21)	$ (35)

Fair Value Measurements (Summar

Fair Value Measurements (Summary Of Quantitative Information About Level 3 Fair Value Measurements) (Details) - USD ($) $ in Millions	9 Months Ended		12 Months Ended
	Sep. 30, 2017		Dec. 31, 2016
Residential Non-Agency [Member] | Discounted Cash Flow [Member] | Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, Fair Value Disclosure, Recurring	$ 3		$ 4
Corporate and other debt securities [Member] | Comparable Evaluated Quote [Member] | Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, Fair Value Disclosure, Recurring	4		3
Commercial mortgage loans held for sale [Member] | Comparable Evaluated Quote [Member] | Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, Fair Value Disclosure, Recurring			33
Mortgage Servicing Rights [Member] | Discounted Cash Flow [Member] | Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, Fair Value Disclosure, Recurring	335	[1]	324	[2]
Interest rate options on residential mortgage loans [Member] | Discounted Cash Flow [Member] | Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, Fair Value Disclosure, Recurring	8		8
Interest Rate Options on commercial morgage loans [Member] | Discounted Cash Flow [Member] | Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, Fair Value Disclosure, Recurring	2		3
Foreclosed Property And Other Real Estate [Member] | Property Appraisal [Member] | Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, Fair Value Disclosure, Nonrecurring	5		1
Foreclosed Property And Other Real Estate [Member] | Estimated Third-Party valuations [Member] | Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, Fair Value Disclosure, Nonrecurring	$ 1		$ 5
Recurring Fair Value Measurements [Member] | Residential Non-Agency [Member] | Minimum [Member] | Discounted Cash Flow [Member]
Fair Value Inputs [Abstract]
Spread to LIBOR	5.40%		5.50%
Fair Value Inputs, Prepayment Rate	3.80%		3.50%
Fair Value Inputs, Probability of Default	1.30%		3.10%
Fair Value Inputs, Loss Severity	88.00%		63.60%
Recurring Fair Value Measurements [Member] | Residential Non-Agency [Member] | Maximum [Member] | Discounted Cash Flow [Member]
Fair Value Inputs [Abstract]
Spread to LIBOR	69.90%		70.00%
Fair Value Inputs, Prepayment Rate	29.30%		29.50%
Fair Value Inputs, Probability of Default	1.30%		3.10%
Fair Value Inputs, Loss Severity	88.00%		63.60%
Recurring Fair Value Measurements [Member] | Residential Non-Agency [Member] | Weighted Average [Member] | Discounted Cash Flow [Member]
Fair Value Inputs [Abstract]
Spread to LIBOR	22.90%		23.00%
Fair Value Inputs, Prepayment Rate	11.40%		12.20%
Fair Value Inputs, Probability of Default	1.30%		3.10%
Fair Value Inputs, Loss Severity	88.00%		63.60%
Recurring Fair Value Measurements [Member] | Corporate and other debt securities [Member] | Minimum [Member] | Comparable Evaluated Quote [Member]
Fair Value Inputs [Abstract]
Evaluated Quote on Comparable Bonds	99.70%		100.30%
Recurring Fair Value Measurements [Member] | Corporate and other debt securities [Member] | Maximum [Member] | Comparable Evaluated Quote [Member]
Fair Value Inputs [Abstract]
Evaluated Quote on Comparable Bonds	99.70%		100.30%
Recurring Fair Value Measurements [Member] | Corporate and other debt securities [Member] | Weighted Average [Member] | Comparable Evaluated Quote [Member]
Fair Value Inputs [Abstract]
Evaluated Quote on Comparable Bonds	99.70%		100.30%
Recurring Fair Value Measurements [Member] | Commercial mortgage loans held for sale [Member] | Minimum [Member] | Comparable Evaluated Quote [Member]
Fair Value Inputs [Abstract]
Credit spreads for bonds in the commercial MBS			0.40%
Recurring Fair Value Measurements [Member] | Commercial mortgage loans held for sale [Member] | Maximum [Member] | Comparable Evaluated Quote [Member]
Fair Value Inputs [Abstract]
Credit spreads for bonds in the commercial MBS			5.80%
Recurring Fair Value Measurements [Member] | Commercial mortgage loans held for sale [Member] | Weighted Average [Member] | Comparable Evaluated Quote [Member]
Fair Value Inputs [Abstract]
Credit spreads for bonds in the commercial MBS			1.30%
Recurring Fair Value Measurements [Member] | Mortgage Servicing Rights [Member] | Minimum [Member] | Discounted Cash Flow [Member]
Fair Value Inputs [Abstract]
Fair Value Inputs, Prepayment Rate	8.10%	[1]	5.70%	[2]
Option-Adjusted Spread	8.10%	[1]	8.20%	[2]
Recurring Fair Value Measurements [Member] | Mortgage Servicing Rights [Member] | Maximum [Member] | Discounted Cash Flow [Member]
Fair Value Inputs [Abstract]
Fair Value Inputs, Prepayment Rate	26.50%	[1]	24.30%	[2]
Option-Adjusted Spread	15.00%	[1]	13.60%	[2]
Recurring Fair Value Measurements [Member] | Mortgage Servicing Rights [Member] | Weighted Average [Member] | Discounted Cash Flow [Member]
Fair Value Inputs [Abstract]
Fair Value Inputs, Prepayment Rate	10.00%	[1]	7.60%	[2]
Option-Adjusted Spread	8.60%	[1]	10.50%	[2]
Recurring Fair Value Measurements [Member] | Interest rate options on residential mortgage loans [Member] | Minimum [Member] | Discounted Cash Flow [Member]
Fair Value Inputs [Abstract]
Fair Value Inputs, Prepayment Rate	8.10%		5.70%
Option-Adjusted Spread	8.10%		8.20%
Pull-Through	8.60%		14.90%
Recurring Fair Value Measurements [Member] | Interest rate options on residential mortgage loans [Member] | Maximum [Member] | Discounted Cash Flow [Member]
Fair Value Inputs [Abstract]
Fair Value Inputs, Prepayment Rate	26.50%		24.30%
Option-Adjusted Spread	15.00%		13.60%
Pull-Through	99.00%		99.40%
Recurring Fair Value Measurements [Member] | Interest rate options on residential mortgage loans [Member] | Weighted Average [Member] | Discounted Cash Flow [Member]
Fair Value Inputs [Abstract]
Fair Value Inputs, Prepayment Rate	10.00%		7.60%
Option-Adjusted Spread	8.60%		10.50%
Pull-Through	79.90%		78.30%
Recurring Fair Value Measurements [Member] | Interest Rate Options on commercial morgage loans [Member] | Minimum [Member] | Discounted Cash Flow [Member]
Fair Value Inputs [Abstract]
Internal Rate of Return	12.00%		7.00%
Recurring Fair Value Measurements [Member] | Interest Rate Options on commercial morgage loans [Member] | Maximum [Member] | Discounted Cash Flow [Member]
Fair Value Inputs [Abstract]
Internal Rate of Return	17.00%		17.00%
Recurring Fair Value Measurements [Member] | Interest Rate Options on commercial morgage loans [Member] | Weighted Average [Member] | Discounted Cash Flow [Member]
Fair Value Inputs [Abstract]
Internal Rate of Return	12.00%		12.00%
Nonrecurring Fair Value Measurements [Member] | Foreclosed Property And Other Real Estate [Member] | Minimum [Member] | Property Appraisal [Member]
Fair Value Inputs [Abstract]
Fair Value Inputs, Comparability Adjustments	25.00%		25.00%
Nonrecurring Fair Value Measurements [Member] | Foreclosed Property And Other Real Estate [Member] | Minimum [Member] | Estimated Third-Party valuations [Member]
Fair Value Inputs [Abstract]
Fair Value Measurement Range Percentage	3.40%		5.90%
Nonrecurring Fair Value Measurements [Member] | Foreclosed Property And Other Real Estate [Member] | Maximum [Member] | Property Appraisal [Member]
Fair Value Inputs [Abstract]
Fair Value Inputs, Comparability Adjustments	35.00%		60.30%
Nonrecurring Fair Value Measurements [Member] | Foreclosed Property And Other Real Estate [Member] | Maximum [Member] | Estimated Third-Party valuations [Member]
Fair Value Inputs [Abstract]
Fair Value Measurement Range Percentage	3.40%		29.60%
Nonrecurring Fair Value Measurements [Member] | Foreclosed Property And Other Real Estate [Member] | Weighted Average [Member] | Property Appraisal [Member]
Fair Value Inputs [Abstract]
Fair Value Inputs, Comparability Adjustments	26.00%		37.00%
Nonrecurring Fair Value Measurements [Member] | Foreclosed Property And Other Real Estate [Member] | Weighted Average [Member] | Estimated Third-Party valuations [Member]
Fair Value Inputs [Abstract]
Fair Value Measurement Range Percentage	3.40%		15.80%
Commercial Loan [Member] | Loans Held For Sale [Member] | Activity For Sales Of Similar Loans [Member] | Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, Fair Value Disclosure, Nonrecurring	$ 5		$ 7
Commercial Loan [Member] | Nonrecurring Fair Value Measurements [Member] | Loans Held For Sale [Member] | Minimum [Member] | Activity For Sales Of Similar Loans [Member]
Fair Value Inputs [Abstract]
Fair Value Inputs, Comparability Adjustments	28.30%		26.20%
Commercial Loan [Member] | Nonrecurring Fair Value Measurements [Member] | Loans Held For Sale [Member] | Maximum [Member] | Activity For Sales Of Similar Loans [Member]
Fair Value Inputs [Abstract]
Fair Value Inputs, Comparability Adjustments	72.70%		69.40%
Commercial Loan [Member] | Nonrecurring Fair Value Measurements [Member] | Loans Held For Sale [Member] | Weighted Average [Member] | Activity For Sales Of Similar Loans [Member]
Fair Value Inputs [Abstract]
Fair Value Inputs, Comparability Adjustments	54.70%		48.10%
[1]	See Note 5 for additional disclosures related to assumptions used in the fair value calculation for residential mortgage servicing rights.
[2]	See Note 7 to the consolidated financial statements of the Annual Report on Form 10-K for the year ended December 31, 2016 for additional disclosures related to assumptions used in the fair value calculation for residential mortgage servicing rights.

Fair Value Measurements (Fair V

Fair Value Measurements (Fair Value Option, Fair Value and Unpaid Principal Balance) (Details) - Mortgage loans held for sale [Member] - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Fair Value, Option, Quantitative Disclosures [Line Items]
Mortgages Held-for-sale, Fair Value Disclosure	$ 307		$ 307		$ 447
Fair Value Option Mortgages Held For Sale Aggregate Unpaid Principal	296		296		443
Aggregate Fair Value Less Aggregate Unpaid Principal	11		11		$ 4
Net gains (losses) resulting from changes in fair value	$ (3)	$ 0	$ 5	$ 9

Fair Value Measurements (Sche76

Fair Value Measurements (Schedule Of Carrying Amounts And Estimated Fair Values Of Financial Instruments) (Details) - USD ($) $ in Millions		Sep. 30, 2017		Dec. 31, 2016
Financial Assets [Abstract]
Trading account securities		$ 193		$ 124
Held-to-maturity Securities		1,720		1,369
Securities available for sale		23,659		23,781
Loans held for sale		307		447
Other earning assets		1,421		1,644
Derivative Asset		256		338
Financial Liabilities [Abstract]
Derivative Liabilities		340		346
Fair Value Discount On Loan Portfolio Amount		$ 3,300		$ 4,100
Fair value discount on loan portfolio, rate		4.30%		5.20%
Leases, carrying amount excluded		$ 964		$ 876
Property Subject to or Available for Operating Lease, Net		530		688
Carrying Amount [Member]
Financial Assets [Abstract]
Cash and cash equivalents		3,761		5,451
Trading account securities		193		124
Held-to-maturity Securities		1,703		1,362
Securities available for sale		23,659		23,781
Loans held for sale		388		718
Net loans (excluding leases)		77,351	[1],[2]	78,128	[3],[4]
Other earning assets		891	[5]	956	[6]
Derivative Asset		414		579
Financial Liabilities [Abstract]
Derivative Liabilities		605		887
Deposits		97,591		99,035
Short-term borrowings		600
Long-term borrowings		6,102		7,763
Loan commitments and letters of credit		85		102
Indemnification obligation		23		28
Estimate of Fair Value [Member]
Financial Assets [Abstract]
Cash and cash equivalents		3,761	[7]	5,451	[8]
Trading account securities		193	[7]	124	[8]
Held-to-maturity Securities		1,720	[7]	1,369	[8]
Securities available for sale		23,659	[7]	23,781	[8]
Loans held for sale		388	[7]	722	[8]
Net loans (excluding leases)		74,002	[1],[2],[7]	74,063	[3],[4],[8]
Other earning assets		891	[5],[7]	956	[6],[8]
Derivative Asset		414	[7]	579	[8]
Financial Liabilities [Abstract]
Derivative Liabilities		605	[7]	887	[8]
Deposits		97,630	[7]	99,081	[8]
Short-term borrowings	[7]	600
Long-term borrowings		6,447	[7]	8,008	[8]
Loan commitments and letters of credit		420	[7]	484	[8]
Indemnification obligation		22	[7]	26	[8]
Level 1 [Member]
Financial Assets [Abstract]
Cash and cash equivalents		3,761		5,451
Trading account securities		193		124
Held-to-maturity Securities		0		0
Securities available for sale		511		504
Loans held for sale		0		0
Net loans (excluding leases)		0	[1],[2]	0	[3],[4]
Other earning assets		0	[5]	0	[6]
Derivative Asset		2		2
Financial Liabilities [Abstract]
Derivative Liabilities		2		1
Deposits		0		0
Short-term borrowings		0
Long-term borrowings		0		0
Loan commitments and letters of credit		0		0
Indemnification obligation		0		0
Level 2 [Member]
Financial Assets [Abstract]
Cash and cash equivalents		0		0
Trading account securities		0		0
Held-to-maturity Securities		1,720		1,369
Securities available for sale		23,141		23,270
Loans held for sale		388		689
Net loans (excluding leases)		0	[1],[2]	0	[3],[4]
Other earning assets		891	[5]	956	[6]
Derivative Asset		402		566
Financial Liabilities [Abstract]
Derivative Liabilities		603		886
Deposits		97,630		99,081
Short-term borrowings		600
Long-term borrowings		4,878		5,408
Loan commitments and letters of credit		0		0
Indemnification obligation		0		0
Level 3 [Member]
Financial Assets [Abstract]
Cash and cash equivalents		0		0
Trading account securities		0		0
Held-to-maturity Securities		0		0
Securities available for sale		7		7
Loans held for sale		0		33
Net loans (excluding leases)		74,002	[1],[2]	74,063	[3],[4]
Other earning assets		0	[5]	0	[6]
Derivative Asset		10		11
Financial Liabilities [Abstract]
Derivative Liabilities		0		0
Deposits		0		0
Short-term borrowings		0
Long-term borrowings		1,569		2,600
Loan commitments and letters of credit		420		484
Indemnification obligation		$ 22		$ 26
[1]	Excluded from this table is the capital lease carrying amount of $964 million at September 30, 2017.
[2]	The estimated fair value of portfolio loans assumes sale of the loans to a third-party financial investor. Accordingly, the value to the Company if the loans were held to maturity is not reflected in the fair value estimate. In the current whole loan market, financial investors are generally requiring a higher rate of return than the return inherent in loans if held to maturity. The fair value discount at September 30, 2017 was $3.3 billion or 4.3 percent.
[3]	Excluded from this table is the capital lease carrying amount of $876 million at December 31, 2016.
[4]	The estimated fair value of portfolio loans assumes sale of the loans to a third-party financial investor. Accordingly, the value to the Company if the loans were held to maturity is not reflected in the fair value estimate. In the current whole loan market, financial investors are generally requiring a higher rate of return than the return inherent in loans if held to maturity. The fair value discount at December 31, 2016 was $4.1 billion or 5.2 percent.
[5]	Excluded from this table is the operating lease carrying amount of $530 million at September 30, 2017.
[6]	Excluded from this table is the operating lease carrying amount of $688 million at December 31, 2016.
[7]	Estimated fair values are consistent with an exit price concept. The assumptions used to estimate the fair values are intended to approximate those that a market participant would use in a hypothetical orderly transaction. In estimating fair value, the Company maintains a corporate governance program to make adjustments for estimated changes in interest rates, market liquidity and credit spreads in the periods they are deemed to have occurred. Historically, the Company has utilized the results of a third-party vendor model to support its primary valuation approach for loans. The Company is currently finalizing the development of an internally-supported loan valuation model which management expects to implement by March 31, 2018.
[8]	Estimated fair values are consistent with an exit price concept. The assumptions used to estimate the fair values are intended to approximate those that a market participant would use in a hypothetical orderly transaction. In estimating fair value, the Company maintains a corporate governance program to make adjustments for estimated changes in interest rates, market liquidity and credit spreads in the periods they are deemed to have occurred. Historically, the Company has utilized the results of a third-party vendor model to support its primary valuation approach for loans. The Company is currently finalizing the development of an internally-supported loan valuation model which management expects to implement by March 31, 2018.

Fair Value Measurements (Narrat

Fair Value Measurements (Narrative) (Details) - USD ($)	Sep. 30, 2017	Sep. 30, 2016
Fair Value Disclosures [Abstract]
Fair Value, Assets, Level 1 to Level 2 Transfers, Amount	$ 0	$ 0

Business Segment Information (S

Business Segment Information (Schedule Of Financial Information By Reportable Segment) (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017USD ($)	Sep. 30, 2016USD ($)	Sep. 30, 2017USD ($)segment	Sep. 30, 2016USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | segment			3
Non-interest income	$ 515	$ 599	$ 1,550	$ 1,631
Non-interest expense	886	934	2,672	2,718
Income from continuing operations before income taxes	451	471	1,323	1,244
Income tax expense (benefit)	139	152	400	380
Corporate Bank [Member]
Segment Reporting Information [Line Items]
Net interest income and other financing income (loss)	362	352	1,062	1,088
Provision (Credit) for Loan Losses	66	72	199	216
Non-interest income	112	130	343	380
Non-interest expense	214	225	649	662
Income from continuing operations before income taxes	194	185	557	590
Income tax expense (benefit)	74	70	212	224
Net income	120	115	345	366
Average assets	51,304	53,798	51,896	54,420
Consumer Bank [Member]
Segment Reporting Information [Line Items]
Net interest income and other financing income (loss)	542	516	1,593	1,531
Provision (Credit) for Loan Losses	75	74	220	215
Non-interest income	275	291	836	831
Non-interest expense	511	530	1,541	1,544
Income from continuing operations before income taxes	231	203	668	603
Income tax expense (benefit)	88	77	254	229
Net income	143	126	414	374
Average assets	34,988	34,843	34,982	34,373
Wealth Management [Member]
Segment Reporting Information [Line Items]
Net interest income and other financing income (loss)	50	43	143	131
Provision (Credit) for Loan Losses	5	5	16	17
Non-interest income	110	107	331	321
Non-interest expense	117	120	358	351
Income from continuing operations before income taxes	38	25	100	84
Income tax expense (benefit)	15	10	38	32
Net income	23	15	62	52
Average assets	3,093	3,233	3,130	3,235
Other [Member]
Segment Reporting Information [Line Items]
Net interest income and other financing income (loss)	(56)	(76)	(159)	(205)
Provision (Credit) for Loan Losses	(70)	(122)	(241)	(234)
Non-interest income	18	71	40	99
Non-interest expense	44	59	124	161
Income from continuing operations before income taxes	(12)	58	(2)	(33)
Income tax expense (benefit)	(38)	(5)	(104)	(105)
Net income	26	63	102	72
Average assets	34,048	33,955	34,016	33,706
Continuing Operations [Member]
Segment Reporting Information [Line Items]
Net interest income and other financing income (loss)	898	835	2,639	2,545
Provision (Credit) for Loan Losses	76	29	194	214
Non-interest income	515	599	1,550	1,631
Non-interest expense	886	934	2,672	2,718
Income from continuing operations before income taxes	451	471	1,323	1,244
Income tax expense (benefit)	139	152	400	380
Net income	312	319	923	864
Average assets	123,433	125,829	124,024	125,734
Discontinued Operations [Member]
Segment Reporting Information [Line Items]
Net interest income and other financing income (loss)	0	0	0	0
Provision (Credit) for Loan Losses	0	0	0	0
Non-interest income	0	0	0	0
Non-interest expense	1	(2)	(9)	(7)
Income from continuing operations before income taxes	(1)	2	9	7
Income tax expense (benefit)	0	1	4	3
Net income	(1)	1	5	4
Average assets	0	0	0	0
Consolidated [Member]
Segment Reporting Information [Line Items]
Net interest income and other financing income (loss)	898	835	2,639	2,545
Provision (Credit) for Loan Losses	76	29	194	214
Non-interest income	515	599	1,550	1,631
Non-interest expense	887	932	2,663	2,711
Income from continuing operations before income taxes	450	473	1,332	1,251
Income tax expense (benefit)	139	153	404	383
Net income	311	320	928	868
Average assets	$ 123,433	$ 125,829	$ 124,024	$ 125,734

Commitments, Contingencies an79

Commitments, Contingencies and Guarantees (Credit Risk Of Financial Instruments By Contractual Amounts) (Details) - USD ($) $ in Millions	Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Dec. 31, 2015
Other Commitments [Line Items]
Unused commitments to extend credit	$ 45,378		$ 44,408
Standby Letters Of Credit Commitment	1,356		1,425
Commercial letters of credit	63		46
Liabilities associated with standby letters of credit	25		34
Assets associated with standby letters of credit	26		34
Reserve for unfunded credit commitments	$ 59	$ 67	$ 69	$ 72	$ 64	$ 52

Commitments, Contingencies an80

Commitments, Contingencies and Guarantees (Narrative) (Details) - USD ($) $ in Millions	Sep. 30, 2017		Dec. 31, 2016
Long-term Purchase Commitment [Line Items]
Fannie Mae DUS Servicing Portfolio, Amount	$ 2,600		$ 1,800
Maximum Quantifiable Fannie Mae DUS Loss Share Guarantee	834		559
Estimated Fair Value of the Fannie Mae DUS Loss Share Guarantee	4		4
Carrying Amount [Member]
Long-term Purchase Commitment [Line Items]
Indemnification obligation	23		28
Carrying Amount [Member] | Indemnification Agreement [Member]
Long-term Purchase Commitment [Line Items]
Indemnification obligation	23
Estimate of Fair Value [Member]
Long-term Purchase Commitment [Line Items]
Indemnification obligation	22	[1]	$ 26	[2]
Estimate of Fair Value [Member] | Indemnification Agreement [Member]
Long-term Purchase Commitment [Line Items]
Indemnification obligation	$ 22
[1]	Estimated fair values are consistent with an exit price concept. The assumptions used to estimate the fair values are intended to approximate those that a market participant would use in a hypothetical orderly transaction. In estimating fair value, the Company maintains a corporate governance program to make adjustments for estimated changes in interest rates, market liquidity and credit spreads in the periods they are deemed to have occurred. Historically, the Company has utilized the results of a third-party vendor model to support its primary valuation approach for loans. The Company is currently finalizing the development of an internally-supported loan valuation model which management expects to implement by March 31, 2018.
[2]	Estimated fair values are consistent with an exit price concept. The assumptions used to estimate the fair values are intended to approximate those that a market participant would use in a hypothetical orderly transaction. In estimating fair value, the Company maintains a corporate governance program to make adjustments for estimated changes in interest rates, market liquidity and credit spreads in the periods they are deemed to have occurred. Historically, the Company has utilized the results of a third-party vendor model to support its primary valuation approach for loans. The Company is currently finalizing the development of an internally-supported loan valuation model which management expects to implement by March 31, 2018.

Recent Accounting Pronounceme81

Recent Accounting Pronouncements (Narrative) (Details) $ in Millions	9 Months Ended
	Sep. 30, 2017USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Revenue Recognition Standard, Amount of 2016 Non-Interest Income Within Scope When Adopted	$ 1,700
New Leasing Standard, 2016 Amount within Scope when Adopted	$ 761